JP2005220180A - Adhesive tape or sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an adhesive tape or sheet excellent in reworkability and workability for correcting the position of application, and using only one release liner when it is a double-faced adhesive tape or sheet. <P>SOLUTION: The adhesive tape or sheet is an adhesive tape or sheet comprising a substrate and an adhesive layer formed on at least one surface of the substrate. The adhesive layer on at least one surface of the substrate partially comprises a fiber convex structure formed in a state where at least part of the fiber is positioned outside the surface of the adhesive layer, wherein the distal end portion of the fiber in the fiber convex structure positioned outside the surface of the adhesive layer at least has a release function. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a pressure-sensitive adhesive tape or sheet. More specifically, the present invention is excellent in reworkability and adhesion position correcting workability when an adherend is bonded using the pressure-sensitive adhesive tape or sheet, and moreover, double-sided pressure-sensitive adhesive tape or sheet. In this case, the present invention relates to an adhesive tape or sheet that can be easily rewound even if it is wound into a roll by a single release liner.

  When adhering the adhesive tape or sheet to various adherends, it is required to adhere easily and firmly to a predetermined position of the adherend. It is required to have a characteristic that allows re-sticking (so-called “reworkability”) and a characteristic that enables correction of the sticking position (sticking position correction workability). For example, an operation of bonding a flooring material to a floor can be given as an operation for bonding to a predetermined position. In the operation of laminating the flooring material to the floor, the flooring material must be inserted, and for that purpose, after the flooring material is inserted, the flooring material must be moved a considerable distance along the floor. . In such an operation, when a pressure-sensitive adhesive tape or sheet having a pressure-sensitive adhesive layer with a normal pressure-sensitive adhesive is used, the flooring material is inserted along the floor after insertion of the flooring material for tackiness and initial adhesiveness of the pressure-sensitive adhesive. It is impossible to move. Therefore, a method using a pressure-sensitive adhesive tape or sheet whose adhesive strength has been temporarily reduced using water or an organic solvent, a water-swelling granular material of a water-absorbing polymer interposed between the surface of the pressure-sensitive adhesive layer and the adherend A method (see Patent Document 1), a method of reducing an initial adhesion area using a pressure-sensitive adhesive tape or sheet having a concavo-convex structure on the surface of the pressure-sensitive adhesive layer (see Patent Document 2), A method of controlling the initial adhesive force using an adhesive tape or sheet in which a non-adhesive substance having a shape is formed in a convex shape has been proposed (see Patent Document 3).

Japanese Patent No. 3296769 JP 2002-121503 A JP-A-7-310057

  However, for example, as described in Japanese Patent No. 3296769, water is used in a method in which a water-swelling granular material of a water-absorbing polymer is interposed between the surface of the pressure-sensitive adhesive layer and the adherend. In addition, water essentially inhibits adhesion, and it is not desirable to use it from the reliability of adhesion.

  In addition, as described in JP-A No. 2002-121503, in the method of reducing the initial adhesion area using an adhesive tape or sheet having an uneven structure on the surface of the adhesive layer, the adhesive tape or sheet Since the pressure-sensitive adhesive layer is present on the surface, the width of the position that can be corrected from the temporarily placed position is limited, and it cannot be said that the workability for correcting the applied position is sufficient.

  Furthermore, as described in JP-A-7-310057, initial adhesion using a pressure-sensitive adhesive tape or sheet in which a solid non-adhesive substance is formed in a convex shape on the surface of the pressure-sensitive adhesive layer. In the method of controlling the force, the non-adhesive substance is only bonded to the surface of the adhesive layer, and the structure of the non-adhesive substance is not controlled. Inevitably, the amount of non-adhesive substance used is inevitably increased, which is not desirable in terms of adhesive properties.

  When the pressure-sensitive adhesive tape or sheet is a double-sided pressure-sensitive adhesive tape or sheet, the two pressure-sensitive adhesive surfaces are usually protected by a release liner. In this case, it is more costly to use a single release liner as the release liner. It can also be said that it is excellent also in environmental and resource saving. In particular, when a release liner (sometimes referred to as “process release liner”) is used when producing a double-sided pressure-sensitive adhesive tape or sheet, the process release liner is used in a double-sided pressure-sensitive adhesive tape or sheet as a product. If it can be used as a release liner (sometimes referred to as “product release liner”), the cost can be further reduced.

Therefore, the object of the present invention is excellent in reworkability and workability for correcting the attaching position, and in the case of a double-sided adhesive tape or sheet, only one release liner is used as a release liner for protecting the adhesive surface. It is to provide an adhesive tape or sheet and a method for producing the same.
Another object of the present invention is to provide a pressure-sensitive adhesive tape or sheet in which the process release liner can be used as a product release liner, and a method for producing the same.
Still another object of the present invention is to provide a pressure-sensitive adhesive tape or sheet useful as a pressure-sensitive adhesive tape or sheet for attaching a flooring material, and a method for producing the same.

  As a result of intensive studies to achieve the above object, the present inventors have provided a specific structure portion made of fibers on the surface of the pressure-sensitive adhesive layer of the pressure-sensitive adhesive tape or sheet. It has been found that when adhering to a position, temporary fixing and re-sticking can be performed, and the pasting position can also be corrected. Furthermore, the present inventors have found that by using a specific configuration, in the case of a double-sided pressure-sensitive adhesive tape or sheet, only one release liner can be used as a release liner for protecting the pressure-sensitive adhesive surface. The present invention has been completed based on these findings.

  That is, the present invention is a pressure-sensitive adhesive tape or sheet in which a pressure-sensitive adhesive layer is formed on at least one surface of a support, and is partially convex in the pressure-sensitive adhesive layer on at least one surface of the support. The structure part is formed in a form in which at least a part of the fiber is located outside the surface of the pressure-sensitive adhesive layer, and the fiber located outside the surface of the pressure-sensitive adhesive layer in the fiber convex structure part. The pressure-sensitive adhesive tape or sheet is characterized in that the tip portion has at least a mold release function.

  The surface of the pressure-sensitive adhesive layer is protected by a release liner having a hole, and the tip portion of the fiber located outside the surface of the pressure-sensitive adhesive layer is a hole of the release liner. After passing through, it is preferable that the fiber convex structure part is formed in the form located outside the outer surface of the release liner. The pressure-sensitive adhesive tape or sheet is preferably a double-sided pressure-sensitive adhesive tape or sheet, and the release liner having a hole is preferably a release liner whose both surfaces are release surfaces.

  Further, the fiber convex structure portion may be partially formed on the surface of the pressure-sensitive adhesive layer on at least one side of the support, or partially on the pressure-sensitive adhesive layer on at least one side of the support. The fiber convex structure portion may be formed on the wall surface of the recess in a form in which at least a part of the fiber protrudes outward from the surface of the pressure-sensitive adhesive layer. As such a fiber convex structure portion, a fiber raised portion having a structure in which fibers stand up from the formed surface is suitable.

In this invention, it is preferable that the fiber convex structure part is formed by the flocking of the fiber. The fiber forming the fiber convex structure portion may be a fiber having a release function by a surface release treatment, or a fiber having a solubility parameter of 21 ([MPa] ^1/2 ) or less. .

The present invention is also a method for producing the pressure-sensitive adhesive tape or sheet, wherein the pressure-sensitive adhesive is obtained by performing flocking on the surface of the pressure-sensitive adhesive layer on at least one surface of the support using a flocking method. After forming the fiber convex structure part in the agent layer in a form in which at least a part of the fiber is located outside the surface of the pressure-sensitive adhesive layer, the pressure-sensitive adhesive in the fiber convex structure part is further formed A method for producing an adhesive tape or sheet characterized in that at least the tip portion of the fiber located outside the surface of the layer is subjected to a release treatment with a release treatment agent, or as a fiber, it is released into a predetermined site in advance. The surface of the pressure-sensitive adhesive layer on at least one surface of the support using a flocking method using fibers having a function or fibers having a solubility parameter of 21 ([MPa] ^1/2 ) or less Applying flocking to The pressure-sensitive adhesive tape or sheet is characterized in that, in the pressure-sensitive adhesive layer, a fiber convex structure is partially formed in a form in which at least a part of the fiber is located outside the surface of the pressure-sensitive adhesive layer. It is a manufacturing method.

  In the production method of the pressure-sensitive adhesive tape or sheet in the present invention, the surface of the pressure-sensitive adhesive layer is subjected to flocking in a state where the release liner having a hole is overlapped on the surface of the pressure-sensitive adhesive layer, whereby the hole of the release liner is formed. It is preferable to form a fiber convex structure portion on the surface of the corresponding pressure-sensitive adhesive layer.

  The pressure-sensitive adhesive tape or sheet of the present invention is excellent in reworkability and workability for correcting the attachment position, and in the case of a double-sided pressure-sensitive adhesive tape or sheet, only one sheet of release liner is used as a release liner for protecting the pressure-sensitive adhesive surface. ing. Furthermore, the process release liner can be used as a product release liner. Therefore, the adhesive tape or sheet of the present invention is useful as an adhesive tape or sheet for attaching a flooring material.

  In the pressure-sensitive adhesive tape or sheet of the present invention, the pressure-sensitive adhesive layer is formed on at least one surface of the support, and the fiber convex structure part is partially formed on the pressure-sensitive adhesive layer on at least one surface of the support. At least a part of the fiber is formed in a form located outside the surface of the pressure-sensitive adhesive layer, and the fiber located outside (outer surface side) than the surface of the pressure-sensitive adhesive layer in the fiber convex structure portion. The tip portion has at least a mold release function. In this way, in the pressure-sensitive adhesive tape or sheet, since the fiber tip portion of the fiber convex structure portion has at least a releasing function, the fiber tip portion of the fiber convex structure portion is located outside. The adhesive side that is being used is used as a release surface (for example, its own back surface) when overlapping with another adhesive surface (for example, the other adhesive surface in the case of a double-sided adhesive tape or sheet). Can do. Therefore, even if the pressure-sensitive adhesive tape or sheet is a double-sided pressure-sensitive adhesive tape or sheet (particularly a double-sided pressure-sensitive adhesive tape or sheet with a substrate), the number of release liners protecting the pressure-sensitive adhesive surface may be one, reducing costs. Furthermore, since the number of release liners to be discarded can be reduced, it is excellent in terms of environment and resources. In the case of a double-sided adhesive tape or sheet, even if it is wound into a roll with a single release liner, the fibers of the fiber convex structure are not stuck to the other adhesive surface, so it can be easily rewound. It is.

  Specifically, for example, when the pressure-sensitive adhesive tape or sheet is a double-sided pressure-sensitive adhesive tape or sheet (particularly, a double-sided pressure-sensitive adhesive tape or sheet with a base material), the fiber is formed only on the outside of one pressure-sensitive adhesive surface (the surface of the pressure-sensitive adhesive layer). Even if it has a configuration in which a fiber convex structure portion in which the tip portion of the fiber is located is formed, when forming the fiber convex structure portion, the fiber using a release liner having a hole is used. By using the formation method by flocking, the release liner having the hole is used as it is as a release liner for protecting the adhesive surface where the fiber tip portion of the fiber convex structure portion is located outside. The surface on the adhesive surface side where the fiber tip portion of the fiber convex structure portion is located on the outside can be used as a release surface (such as a self-rear surface) when overlapping the other adhesive surface. Therefore, the process release liner can be used as a product release liner, the cost can be further reduced, and it can be said that it is further excellent in terms of environment and resources. Moreover, as the release liner having the hole portion, even if the thickness is thinner than the length of the fiber located outside the adhesive surface, the tip portion of the fiber in the fiber convex structure portion, Since it has a mold release function at least, the tip part of the fiber in the fiber convex structure part is not bonded to the other adhesive surface. Therefore, as the release liner, it is not necessary to use a thicker one according to the length of the fiber, so that a release liner having a generally used thickness can be used. It is advantageous and the handleability can be good.

  Therefore, as the pressure-sensitive adhesive tape or sheet of the present invention, the surface of the pressure-sensitive adhesive layer is protected by a release liner having a hole, and the fibers are located outside the surface of the pressure-sensitive adhesive layer. The convex part of the fiber may be formed in a form in which the tip part is positioned outside the outer surface of the release liner through the hole of the release liner, and in particular, a double-sided adhesive tape or sheet. In addition, it is preferable that the release liner having the hole portion has a configuration in which the release liner is a release surface on both sides.

(Fiber convex structure)
The fiber convex structure part is formed in a form (configuration) in which at least a part of the fiber is located outside the surface of the pressure-sensitive adhesive layer, and the fiber tip is located outside the surface of the pressure-sensitive adhesive layer. The part has at least a release function, and the surface on which the fiber convex structure part is formed is not particularly limited. For example, the part is formed on the surface of the pressure-sensitive adhesive layer or partially on the pressure-sensitive adhesive layer. The wall surface of the recessed part etc. are mentioned. Specifically, as a configuration of the fiber convex structure portion, for example, (1) a configuration in which the fiber convex structure portion is partially formed on the surface of the pressure-sensitive adhesive layer on at least one surface of the support. (2) A concave portion is partially formed in the pressure-sensitive adhesive layer on at least one surface of the support, and at least a part of the fiber is outside the surface of the pressure-sensitive adhesive layer on the wall surface of the concave portion (external side) And the like, in which the fiber convex structure is formed.

  In the configuration of such a fiber convex structure portion, in the above-described configuration (1), since the fiber convex structure portion is formed on the surface of the pressure-sensitive adhesive layer, all the fibers are more than the surface of the pressure-sensitive adhesive layer. It can be said that it has the structure located outside. In the above-described configuration (2), since the fiber convex structure portion is formed on the wall surface of the concave portion in the pressure-sensitive adhesive layer, at least a part of fibers (and a part of one fiber) is included. It can be said that it has the structure located outside the surface of the adhesive layer. As described above, in the fiber convex structure portion, it is not always necessary that all the fibers are located outside (outside) the surface of the pressure-sensitive adhesive layer, and at least a part of the fibers (for example, fiber convex shape). When the structure portion is formed on the wall surface of the concave portion of the pressure-sensitive adhesive layer, the fiber formed on the upper side of the wall surface of the concave portion of the pressure-sensitive adhesive layer may be positioned outside the surface of the pressure-sensitive adhesive layer.

  In addition, as the fibers located outside the surface of the pressure-sensitive adhesive layer, it is not necessary that the entire length of one fiber is located outside the surface of the pressure-sensitive adhesive layer, and at least a part of one fiber. Should just be located outside the surface of the pressure-sensitive adhesive layer.

  Furthermore, when the fiber convex structure portion is formed on the wall surface of the concave portion in the pressure-sensitive adhesive layer, it is not necessary to be formed on the entire surface of the wall surface of the concave portion of the pressure-sensitive adhesive layer. What is necessary is just to be formed in a part.

  In addition, the fiber convex structure part is formed in the wall surface of the recessed part in an adhesive layer, and the recessed part of an adhesive layer is a hole (through-hole part), and an adhesive tape or sheet | seat is shown below. However, as shown below, when it is a base-less type double-sided pressure-sensitive adhesive tape or sheet, the hole as a concave portion of the pressure-sensitive adhesive layer is an open portion on both surface sides of the pressure-sensitive adhesive layer. In addition, the surface of the pressure-sensitive adhesive layer in which the fibers of the fiber convex structure portion are positioned to protrude outward from the surface of the pressure-sensitive adhesive layer can be at least one surface of the pressure-sensitive adhesive layer, preferably Is the surface of one side of the adhesive layer. Of course, when the concave portion of the pressure-sensitive adhesive layer is a depressed portion as shown below, or when the pressure-sensitive adhesive tape or sheet is a pressure-sensitive adhesive tape or sheet with a substrate as shown below, Since the concave portion (such as a depressed portion or a hole portion) is an open portion only on one side of the pressure-sensitive adhesive layer, the fibers of the fiber convex structure portion are formed on the surface of the pressure-sensitive adhesive layer that is the open portion. The surface of the pressure-sensitive adhesive layer can be the surface of the pressure-sensitive adhesive layer that protrudes outward from the surface of the pressure-sensitive adhesive layer.

  As the fiber convex structure portion, the fiber is in a shape located outside the surface of the pressure-sensitive adhesive layer, formed in a convex shape by the fiber, and further, the tip of the fiber located outside the surface of the pressure-sensitive adhesive layer The part is at least a structure part having a releasing function, for example, a fiber raising part having a structure in which fibers stand up from the formed surface, or a lump of fibers is provided on the formed surface Examples thereof include a fiber convex structure having a structure as described above. Specifically, when the fiber convex structure portion is formed on the surface of the pressure-sensitive adhesive layer, the fiber raised portion having a structure in which the fibers stand up from the surface of the pressure-sensitive adhesive layer, and the lump of fibers is the pressure-sensitive adhesive. Examples thereof include a fiber convex structure having a structure as provided on the surface of the layer. Further, when the fiber convex structure portion is formed on the wall surface of the concave portion in the pressure-sensitive adhesive layer, the fiber protrudes from the wall surface of the concave portion of the pressure-sensitive adhesive layer to stand outside the surface of the pressure-sensitive adhesive layer (particularly, The fiber raised portion has a structure in which the end of the fiber protrudes, and the lump of the fiber is provided on the wall surface of the concave portion of the adhesive layer, and a part of the fiber protrudes outside the surface of the adhesive layer. Examples thereof include a fiber convex structure. The fiber convex structure portion may be composed of a single structure, or may be composed of a structure in which a plurality of structures are combined.

  In addition, one fiber convex structure part is normally comprised by the some fiber. The number and density of the fibers constituting one fiber convex structure portion are not particularly limited, and can be appropriately selected according to the intended reworkability, sticking position correction workability, the type of adherend, and the like.

  As the fiber convex structure portion, a fiber raised portion having a structure in which the fiber stands up from the formed surface (in particular, a fiber raised portion having a structure in which the fiber stands up from the surface of the adhesive layer) ) Is preferred.

  In particular, it is important for the fiber convex structure portion that at least the tip portion of the fiber located outside the surface of the pressure-sensitive adhesive layer has a release function. As the fiber having such a releasing function, it is sufficient that at least the fiber located outside the surface of the pressure-sensitive adhesive layer is included, for example, the fiber located outside the surface of the pressure-sensitive adhesive layer. Or only a part of the fibers that are located outside the surface of the pressure-sensitive adhesive layer and a part of the fibers that are not located outside the surface of the pressure-sensitive adhesive layer. Or all fibers.

  Further, in the fiber having a mold release function, the part having a mold release function in the fiber is not particularly limited as long as it includes at least the tip part. Examples include the entire portion located outside the surface of the layer, the portion including at least the portion, and only the tip portion of the fiber. In addition, the surface of the adhesive layer is protected by a release liner having a hole. In this case, the entire portion located outside the outer surface of the release liner having a hole portion protecting the surface of the pressure-sensitive adhesive layer or a portion including at least the portion may be used. In addition, when the surface of the pressure-sensitive adhesive layer is protected by a release liner having a hole, the surface of the pressure-sensitive adhesive layer is protected as a part having a release function in the fiber having a release function. It is preferable that it is the whole part located outside the outer surface of the release liner having the hole portion.

  Thus, in the present invention, the fiber having a release function is at least a fiber located outside the surface of the pressure-sensitive adhesive layer, and a part having a release function in the fiber. As at least the tip portion of the fiber.

  Specific examples of the pressure-sensitive adhesive tape or sheet of the present invention are shown in FIGS. FIG. 1 is a schematic view partially showing an example of the pressure-sensitive adhesive tape or sheet of the present invention, FIG. 1 (a) is a schematic plan view seen from the top surface of the pressure-sensitive adhesive tape or sheet, and FIG. It is a schematic sectional drawing of the XY line in a). In FIG. 1, 1 is a pressure-sensitive adhesive tape or sheet, 2 is a pressure-sensitive adhesive layer, 2a is the surface of the pressure-sensitive adhesive layer 2, 3 is a pressure-sensitive adhesive tape or sheet substrate (sometimes simply referred to as "base material"), 4 is The release liner 4 a is a hole of the release liner 4, 5 is a fiber raising portion, and 5 a is a portion having a releasing function in the fiber raising portion 5. The pressure-sensitive adhesive tape or sheet 1 has a structure in which a pressure-sensitive adhesive layer 2 is formed on one side of a base material 3 as a support and the pressure-sensitive adhesive layer 2 is protected by a release liner 4. On the surface 2a, a fiber raised portion 5 is provided as a fiber convex structure portion at a portion corresponding to the hole 4a of the release liner 4. The fiber raising part 5 has a part 5a having a releasing function on the tip part side, and the part 5a having the releasing function is obtained by a release treatment with a release treatment agent. Is formed. The part 5 a having a releasing function in the fiber raising part 5 is a part located outside the outer surface of the release liner 4 through the hole 4 a of the release liner 4. That is, the fiber raised portion 5 is formed in a form in which the tip portion is located outside the outer surface of the release liner 4 through the hole 4 a of the release liner 4, and from the outer surface of the release liner 4. Further, the tip portion of the fiber located outside has a structure in which the release treatment is performed with the release treatment agent.

  FIG. 2 is a schematic view partially showing another example of the pressure-sensitive adhesive tape or sheet of the present invention. FIG. 2 (a) is a schematic plan view seen from the top surface of the pressure-sensitive adhesive tape or sheet. FIG. FIG. 3 is a schematic sectional view taken along line X′-Y ′ in FIG. In FIG. 2, 11 is an adhesive tape or sheet, 21 is an adhesive layer, 21a is a recess of the adhesive layer 21, 21a1 is a wall surface of the recess 21a of the adhesive layer 21, 21b is a surface of the adhesive layer 21, and 31 is an adhesive. Release liner 41 for tape or sheet (sometimes referred to simply as “release liner”), 41 is a release liner having a hole, 41 a is a hole in the release liner 41, 51 is a fiber raising portion, and 51 a is a fiber raising portion 51. This is a part having a mold release function. The pressure-sensitive adhesive tape or sheet 11 has a pressure-sensitive adhesive layer 21 formed on one side of a release liner 31 as a support, and the pressure-sensitive adhesive layer 21 has a recess 21a in the form of a through hole. The recess 21 a is partially formed in the pressure-sensitive adhesive layer 21. That is, the opening of the recess 21 a is partially formed on the surface of the pressure-sensitive adhesive layer 21. The pressure-sensitive adhesive layer 21 has a structure in which the surface 21b is protected by a release liner 41 having a hole 41a. The hole 41a of the release liner 41 and the recess 21a of the pressure-sensitive adhesive layer 21 are provided. And have a corresponding positional relationship. Specifically, the wall surface of the hole 41a and the wall surface of the recess 21a are configured to be continuously formed. Further, a fiber raised portion 51 is provided as a fiber convex structure portion on the wall surface 21a1 of the concave portion 21a of the pressure-sensitive adhesive layer 21, and the fiber raised portion 51 is formed from the wall surface 21a1 of the concave portion 21a on the pressure-sensitive adhesive layer 21. It has a structure in which fibers stand up and protrude outward from the surface 21b (that is, on the side of the release liner 41 having the hole 41a). Moreover, the said fiber raising part 51 has the site | part 51a which has a mold release function in the front-end | tip part side, and the site | part 51a which has this mold release function is mold release by a peeling process agent. It is formed by processing. The part 51 a having a releasing function in the fiber raising part 51 is a part located outside the outer surface of the release liner 41 through the hole 41 a of the release liner 41. That is, the fiber raised portion 51 is formed in such a form that the tip portion is located outside the outer surface of the release liner 41 through the hole 41 a of the release liner 41, and from the outer surface of the release liner 41. Further, the tip portion of the fiber located outside has a structure in which the release treatment is performed with the release treatment agent.

  In addition, in FIG. 1, the said fiber raising part 5 is provided in the shape which forms a some line as a whole. On the other hand, in FIG. 2, in the pressure-sensitive adhesive layer 21, the concave portion 21 a is provided in a shape that forms a plurality of lines as a whole, and thus the fiber raised portion 51 also has a plurality of lines as a whole. It has a shape to form. Thus, in the pressure-sensitive adhesive tape or sheet of the present invention, the fiber convex structure portion such as the fiber raised portion may be provided in a shape that forms a plurality of lines as a whole.

In the pressure-sensitive adhesive tape or sheet 1 according to FIG. 1, the interval between the lines in the fiber raising portion 5 (interval at the center of each line) is 10 mm, and the interval between the fiber raising portions included in one line. (Distance between the center portions of the fiber raised portions) is 10 mm. Further, the shape of one fiber raising portion on the surface of the pressure-sensitive adhesive layer is a substantially circular shape having an radius of about 0.5 mm (area is about 0.8 mm ² ). Further, the adjacent lines have a configuration in which each fiber raised portion in the other line is formed in a portion located in the central portion between each fiber raised portion in one line.

On the other hand, in the pressure-sensitive adhesive tape or sheet 11 according to FIG. 2, the interval between the lines in the recess 21a (interval between the central portions of each line) is 10 mm, and the interval between each recess included in one line (each The distance between the central portions of the recesses) is 10 mm. Moreover, the shape of the opening part in the adhesive layer surface of one recessed part is a substantially circular shape (area is about 0.8 mm < ² >) whose radius is about 0.5 mm. Furthermore, the adjacent lines have a configuration in which the respective concave portions in the other line are formed in a portion located in the central portion between the concave portions in one line. The fiber raising part 51 is formed in the wall surface of such a recessed part 21a.

  As the structure of such a fiber raising portion, for example, (1) one end of one fiber is bonded and fixed to a predetermined surface (surface, concave wall surface, etc.) of the pressure-sensitive adhesive layer, and the other end A structure in which fibers stand up in a substantially I-shape and protrude outside the adhesive layer surface in a state where the portion is not fixed (free) (structure shown in FIGS. 1 and 2) (2) Adhering in a state where the center of one fiber is bonded to a predetermined surface (surface, concave wall surface, etc.) of the pressure-sensitive adhesive layer, and both ends of the fiber are not fixed (free) A structure in which the fibers stand up and protrude in a substantially V shape outside the surface of the adhesive layer, and (3) both ends of one fiber are bonded to a predetermined surface (surface, concave wall surface, etc.) of the adhesive layer In the state where the center part of the fiber is not fixed (free), the fiber is outside the adhesive layer surface. In addition to a structure that stands up and protrudes in a substantially U-shape, the fibers are substantially W-shaped and substantially M-shaped from a predetermined surface (surface, concave wall surface, etc.) of the adhesive layer to the outside of the adhesive layer surface. , A structure that stands up and protrudes in a shape such as a substantially N-shape or a substantially O-shape, and a structure in which these structures are combined. As the structure of the fiber raising portion, the structure described in (1) above (the fiber stands up from the predetermined surface such as the surface of the pressure-sensitive adhesive layer or the wall surface of the concave portion on the outer side of the surface of the pressure-sensitive adhesive layer and protrudes in a substantially I shape. Structure) is preferred.

  Of course, the fiber raised portion is such that the fibers stand up straight from the predetermined surface (surface, concave wall surface, etc.) of the pressure-sensitive adhesive tape or the pressure-sensitive adhesive layer for the sheet, such as an I-shape, than the surface of the pressure-sensitive adhesive layer. It may be in a state of protruding outward, in a state of having a jagged shape, a wavy shape, a loop shape, etc., and may be in a state of standing up overall and protruding outward from the adhesive layer surface. .

  The fiber convex structure part is partially provided in the pressure-sensitive adhesive layer, and the shape thereof as a whole is not particularly limited, and may have a predetermined pattern shape. In addition, when the fiber convex structure part is formed in the wall surface of the recessed part in an adhesive layer, the shape as a whole in a fiber convex structure part respond | corresponds to the shape as a whole of a recessed part.

  For example, when the fiber convex structure portion is formed in a pattern shape as shown in FIG. 1 as a whole, that is, the fiber convex structure portion as a whole forms a plurality of lines. When provided, the interval between the lines can be selected from a range of about 1 to 100 mm (preferably 3 to 50 mm, more preferably 5 to 40 mm), for example. Moreover, the space | interval between each fiber convex-shaped structure part contained in one line can be selected from the range of about 1-100 mm (preferably 3-50 mm, more preferably 5-40 mm), for example. Furthermore, the positional relationship between the fiber convex structures in adjacent lines is not particularly limited, and may be a positional relationship that is a lattice shape as a whole, or a positional relationship that is an indefinite shape as a whole. Good.

  In addition, about one fiber convex-shaped structure part, it does not restrict | limit especially as a shape in the adhesive layer surface, For example, a substantially circular shape, a substantially polygonal shape, and an indefinite shape may be sufficient. Moreover, the number of the fiber convex structure part currently formed in the adhesive layer is not restrict | limited.

  On the surface of the pressure-sensitive adhesive layer, the total area of the portion where the fiber convex structure portion is provided (the area of the total fiber convex structure portion) is not particularly limited. The area is desirably 0.001 to 20% (preferably 0.005 to 15%, more preferably 0.01 to 10%). If the area on the pressure-sensitive adhesive layer surface of all fiber convex structures is less than 0.001% with respect to the total surface area of the pressure-sensitive adhesive layer, the effect of reducing the initial adhesive strength is reduced, and reworkability and pasting position correction work are reduced. Sex is reduced. On the other hand, when the area of the adhesive layer surface of the all-fiber convex structure part exceeds 20% with respect to the total surface area of the adhesive layer, the rework property and the pasting position correction workability are improved. Adhesive strength to the adherend is reduced.

Moreover, it does not restrict | limit especially as an area in the adhesive layer surface of each fiber convex structure part, For example, 0.1-10 mm < ² > (preferably 0.3-5 mm < ² >, More preferably, 0.5-3 mm < ² >. ) Is preferably selected from a range of about, but may be less than 0.1 mm ^{2 or more} than 10 mm ² .

Furthermore, for example, when a plurality of fiber convex structure portions are provided so that the area of each fiber convex structure portion on the pressure-sensitive adhesive layer surface is 0.1 to 10 mm ² , between the fiber convex structure portions The shortest interval may be, for example, about 1 to 100 mm (preferably 3 to 50 mm, more preferably 5 to 40 mm).

  In addition, as an area in the adhesive layer surface of a fiber convex structure part, it can be set as the area of the part enclosed by the fiber convex structure part. That is, when the fiber convex structure portion is formed on the wall surface of the concave portion in the pressure-sensitive adhesive layer, the area of the fiber convex structure portion on the pressure-sensitive adhesive layer surface corresponds to the area of the opening on the pressure-sensitive adhesive layer surface of the concave portion. ing.

  As such a fiber convex structure part, as shown in FIGS. 1-2, the front-end | tip part of the fiber located outside the surface of an adhesive layer has a mold release function at least. This is very important. The fiber has a mold release function, even if the surface of the pressure-sensitive adhesive layer is superimposed on the tip part having the fiber release function of the fiber convex structure part in the adhesive tape or sheet, This means that the pressure-sensitive adhesive layer can be easily peeled off from the tip portion having a fiber release function. Specifically, the pressure-sensitive adhesive tape or sheet is a double-sided pressure-sensitive adhesive tape or sheet, and only on one surface side of the pressure-sensitive adhesive layer, the fiber convex structure part is at least partially adhesive. Formed in a form located outside the surface of the layer, and at least the tip portion of the fiber located outside the surface of the pressure-sensitive adhesive layer in the fiber convex structure portion has a mold release function In addition, the surface of the pressure-sensitive adhesive layer on the side where the fiber having a releasing function at the tip portion is located outside the surface of the pressure-sensitive adhesive layer has a hole and both surfaces become release surfaces. Of two test pieces prepared from the same adhesive tape or sheet when the protective liner is protected by the release liner, the fiber having a release function at the tip of one test piece is more than the surface of the adhesive layer. The side surface that is located outside The portion where the fiber having the part releasing function is not formed is the surface of the release liner) and the surface of the pressure-sensitive adhesive layer in the other test piece is superimposed on the 2 kg roller 1 After pasting by reciprocating, 180 ° peel adhesive strength after 30 minutes (adhesive tape or sheet width: 25 mm, tensile speed: 300 mm / min, temperature: 23 ± 2 ° C., humidity: 50 ± 5% RH ), The 180 ° peel adhesive strength is less than 3 N / 25 mm (preferably less than 2 N / 25 mm, more preferably less than 1 N / 25 mm).

  The part having a release function at least at the tip part of the fiber has a release function by adding the release function to the fiber by a release process (release process) with a release treatment agent. Or may be a part having a mold release function because the fiber itself has a mold release function, or a combination of the two. Also good. In addition, when adding a release function to a fiber with a release treatment agent, the release treatment with the release treatment agent may be performed either before or after the formation of the fiber convex structure portion. That is, when forming the fiber convex structure portion, as the fiber, a fiber that has been subjected to a release treatment with a release treatment agent in advance on a predetermined portion (a portion including at least a tip portion) of the fiber may be used, or After forming the fiber convex structure portion, a predetermined portion (a portion including at least the tip portion) of the fiber may be subjected to a release treatment with a release treatment agent.

The fiber itself having a release function (sometimes referred to as “release fiber”) is not particularly limited as long as the fiber itself has a release function. As the pressure-sensitive adhesive forming the pressure-sensitive adhesive layer, a rubber-based pressure-sensitive adhesive or an acrylic pressure-sensitive adhesive (particularly an acrylic pressure-sensitive adhesive) is preferably used. As the release fiber, a rubber-based pressure-sensitive adhesive or an acrylic pressure-sensitive adhesive is used. Those that can exhibit good releasability with respect to (especially acrylic pressure-sensitive adhesive) can be suitably used. As such a release fiber (that is, a fiber having a release function with respect to a rubber adhesive or an acrylic adhesive, and the fiber itself has a release function), the solubility parameter is A fiber that is 21 ([MPa] ^1/2 ) or less can be suitably used. When the solubility parameter of the release fiber exceeds 21 ([MPa] ^1/2 ), the releasability of the pressure-sensitive adhesive layer formed by the rubber-based pressure-sensitive adhesive or the acrylic pressure-sensitive adhesive is lowered, and the release function is lowered. . The solubility parameter of such a release fiber is not particularly limited as long as it is 21 ([MPa] ^1/2 ) or less, preferably 20 ([MPa] ^1/2 ) or less, and more preferably 18 ([MPa] ^1/2 ). [MPa] ^1/2 ) or less. The lower limit of the solubility parameter of the release fiber is not particularly limited, and is, for example, 1 ([MPa] ^1/2 ) or more, preferably 5 ([MPa] ^1/2 ) or more, and more preferably 10 ([MPa). ] ^1/2 ) or more.

Fibers with a release fiber solubility parameter of 21 ([MPa] ^1/2 ) or less [for example, as shown below, fibers made of polyolefin resin (polyolefin fibers), fibers made of silicone compounds (silicone fibers) , Fibers made of fluorine compounds (fluorine fibers, etc.) are adhesives other than rubber adhesives and acrylic adhesives (for example, polyester adhesives, urethane adhesives, polyamide adhesives, epoxy adhesives) , Vinyl alkyl ether pressure-sensitive adhesives, silicone pressure-sensitive adhesives, and fluorine-based pressure-sensitive adhesive layers). In the case of the same kind of polymer as the base polymer of the pressure-sensitive adhesive that forms, the releasability may not be exhibited effectively. Specifically, this corresponds to the case where the release fiber is a silicone-based fiber or a fluorine-based fiber, and the pressure-sensitive adhesive forming the pressure-sensitive adhesive layer is a silicone-based pressure-sensitive adhesive or a fluorine-based pressure-sensitive adhesive. Therefore, it is important to select the release fiber appropriately according to the type of pressure-sensitive adhesive forming the pressure-sensitive adhesive layer.

The solubility parameter (sometimes referred to as “SP value”) is represented by the square root of the cohesive energy density of the molecule as represented by the following formula (1), and the surface tension is represented by the following formula (2). It has the relationship represented by.
δ = (E / V) ^1/2 (1)
[In Formula (1), δ is a solubility parameter (cal / cm ³ ), E is a molecular cohesive energy (cal / mol), and V is a molecular molar volume (cm ³ / mol)]
δ = 4.1 × ([γ / V] ^1/3 ) ^0.43 (2)
[In formula (2), δ is a solubility parameter (cal / cm ³ ), γ is a surface tension (cal / mol), and V is a molecular molar volume (cm ³ / mol)]

  Thus, the solubility parameter has a close relationship with the surface tension. In addition, it is well known that the surface tension is an index representing the ease of adhesion of a substance. Therefore, the solubility parameter can also be used as an index representing the ease of adhesion of the substance.

As the SP value, if the structure of the target substance is clarified by analysis or the like, it can be easily obtained by calculation according to the formula (1a) proposed by Fedors.
δ = (E / V) ^1/2 = (Σe _i / Σv _i ) ^1/2 (1a)
[In the formula (1a), e _i and v _i are the cohesive energy (cal / mol) of the atomic group and the molar volume (cm ³ / mol) of the atomic group, respectively. δ, E and V are the same as above. Note that e _i and v _i are the cohesive energy E, the molar volume V, and the following relational expressions (1a1) and (1a2), respectively.
Σe _i = E (cal / mol) (1a1)
Σv _i = V (cm ³ / mol) (1a2)
It has the relationship represented by. ]

Specifically, as the polymer substance having an SP value calculated by the formula (1a) of 21 ([MPa] ^1/2 ) or less, polyethylene (SP value) is obtained by the following SP value calculation method. : 17.6 [MPa] ^1/2 ), polypropylene (SP value: 16.4 [MPa] ^1/2 ), polytetrafluoroethylene (SP value: 13.7 [MPa] ^1/2 ), polydimethylsiloxane (SP value: 15.4 [MPa] ^1/2 ) and the like. Any of these polymer substances is a known polymer substance as an acrylic adhesive or a rubber adhesive that is difficult to adhere (a polymer that can exhibit low adhesion).

The SP value calculated by the above formula (1a) is a value expressed in units of [cal / cm ³ ] ^1/2 , converted to an SI unit system, and the unit is [MPa] ^1/2. It is necessary to enlarge 2.05 times. In other words, the SP value can be expressed in units of [MPa] ^1/2 that is an SI unit system by multiplying the value calculated by the formula (1a) by 2.05.

(SP value calculation method)
(A) Polyethylene: structural unit (monomer unit) "- CH ₂ -CH ₂ -"
The atomic group has _two “CH ₂ ”.
Σe _i = 1180 (CH ₂ ) +1180 (CH ₂ ) = 2360 (cal / mol)
Σv _i = 16.1 (CH ₂ ) +16.1 (CH ₂ ) = 32.2 (cm ³ / mol)
δ = (2360 / 32.2) ^1/2 = 8.6 [cal / cm ³ ] ^1/2 = 17.6 [MPa] ^1/2

(B) Polypropylene: Structural unit “—CH ₂ —CH (CH ₃ ) —”
The atomic groups are “CH ₂ ”, “CH”, and “CH ₃ ”.
Σe _i = 1180 (CH ₂ ) +820 (CH) +1125 (CH ₃ ) = 3125 (cal / mol)
Σv _i = 16.1 (CH ₂ ) −1.0 (CH) +33.5 (CH ₃ ) = 48.6 (cm ³ / mol)
δ = (3125 / 48.6) ^1/2 = 8.0 [cal / cm ³ ] ^1/2 = 16.4 [MPa] ^1/2

(C) Polytetrafluoroethylene: structural unit “—CF ₂ —CF ₂ —”
The atomic group has _two “CF ₂ ”.
Σe _i = 1020 (CF ₂ ) +1020 (CF ₂ ) = 2040 (cal / mol)
Σv _i = 23.0 (CF ₂ ) +23.0 (CF ₂ ) = 46.0 (cm ³ / mol)
δ = (2040 / 46.0) ^1/2 = 6.7 [cal / cm ³ ] ^1/2 = 13.7 [MPa] ^1/2

(D) Polydimethylsiloxane: Structural unit “—Si (CH ₃ ) ₂ —O—”
The atomic group is two “CH ₃ ”, “Si” and “O”.
Σe _i = 1125 (CH ₃ ) +1125 (CH ₃ ) +1120 (Si) +800 (O) = 4070 (cal / mol)
Σv _i = 33.5 (CH ₃ ) +33.5 (CH ₃ ) +0 (Si) +3.8 (O) = 70.8 (cm ³ / mol)
^{δ = (4070 / 70.8) 1/2} = 7.5 [cal / cm 3] 1/2 = 15.4 [MPa] 1/2

On the other hand, as a high molecular substance whose SP value obtained by the above formula (1a) exceeds 21 ([MPa] ^1/2 ), polystyrene (SP value: 21. 7 [MPa] ^1/2 ) and polyvinyl chloride (SP value: 22.6 [MPa] ^1/2 ). These high molecular substances are known high molecular substances that are well bonded with acrylic adhesives and rubber adhesives.

(SP value calculation method)
(E) Polystyrene: Structural unit “—CH (C ₆ H ₅ ) —CH ₂ —”
The atomic group is “C ₆ H ₅ ”, “CH”, “CH ₂ ”.
Σe _i = 7630 (C ₆ H ₅ ) +820 (CH) +1180 (CH ₂ ) = 9630 (cal / mol)
Σv _i = 71.4 (C ₆ H ₅ ) -1 (CH) +16.1 (CH ₂ ) = 86.5 (cm ³ / mol)
δ = (9630 / 86.5) ^1/2 = 10.6 [cal / cm ³ ] ^1/2 = 21.7 [MPa] ^1/2

(F) Polyvinyl chloride: Structural unit “—CH ₂ —CH (Cl) —”
The atomic groups are “CH ₂ ”, “CH”, and “Cl”.
Σe _i = 1180 (CH ₂ ) +820 (CH) +2760 (Cl) = 4760 (cal / mol)
Σv _i = 16.1 (CH ₂ ) -1 (CH) +24.0 (Cl) = 39.1 (cm ³ / mol)
δ = (4760 / 39.1) ^1/2 = 11.0 [cal / cm ³ ] ^1/2 = 22.6 [MPa] ^1/2

Thus, the SP value obtained by the formula (1a) can be an index of the ease of adhesion of the pressure-sensitive adhesive layer. The SP value of the polymer substance capable of exhibiting good releasability with respect to the pressure-sensitive adhesive layer can be appropriately selected according to the type of pressure-sensitive adhesive forming the pressure-sensitive adhesive layer. For example, when the pressure-sensitive adhesive forming the pressure-sensitive adhesive layer is a pressure-sensitive adhesive such as an acrylic pressure-sensitive adhesive or a rubber pressure-sensitive adhesive (excluding silicone pressure-sensitive adhesives and fluorine-based pressure-sensitive adhesives), the pressure-sensitive adhesive layer is good. As described above, the SP value of the polymer substance capable of exhibiting a good releasability is 21 ([MPa] ^1/2 ) or less.

The polymer substance in the release fiber (that is, the fiber having a solubility parameter of 21 ([MPa] ^1/2 ) or less) is particularly limited as long as the SP value is 21 ([MPa] ^1/2 ) or less. In addition, there is no obstacle even if it is a polymer substance other than the polymer, but from the viewpoint of easy fiberization, polyolefin resin, silicone compound, and fluorine compound are preferable. That is, as the release fiber, a fiber made of polyolefin resin (polyolefin fiber), a fiber made of silicone compound (silicone fiber), and a fiber made of fluorine compound (fluorine fiber) can be preferably used. The release fibers can be used alone or in combination of two or more.

  In the present invention, polyolefin fibers can be particularly preferably used as the release fiber. Examples of the polyolefin resin constituting the polyolefin fiber include polyethylene (for example, low density polyethylene, linear low density polyethylene, metallocene catalyzed polyethylene, medium density polyethylene, high density polyethylene, etc.), polypropylene, polybutene [for example, polybutene (1-butene) and the like], poly (4-methyl-1-pentene), α-olefin copolymer [for example, a copolymer of ethylene and an α-olefin having 3 to 10 carbon atoms (“ethylene-α- An olefin copolymer), a copolymer of propylene and an α-olefin having 4 to 10 carbon atoms (sometimes referred to as a “propylene-α-olefin copolymer”), etc.], ethylene and Examples include copolymers with components other than α-olefins. In the ethylene-α-olefin copolymer, the α-olefin having 3 to 10 carbon atoms is a group consisting of propylene, 1-butene, 1-hexene, 4-methyl-1-pentene, and 1-octene. At least one α-olefin (comonomer) selected from can be preferably used. In the propylene-α-olefin copolymer, the α-olefin having 4 to 10 carbon atoms is selected from the group consisting of 1-butene, 1-hexene, 4-methyl-1-pentene, and 1-octene. Further, at least one α-olefin (comonomer) can be preferably used. Accordingly, examples of the ethylene-α-olefin copolymer include an ethylene-propylene copolymer and an ethylene- (1-butene) copolymer. As the polyolefin fiber, a fiber (polyethylene fiber) made of polyethylene (particularly linear low-density polyethylene or low-density polyethylene) is suitable.

  In the release fiber, the silicone compound constituting the silicone fiber is, for example, a polysiloxane polymer (for example, polydimethylsiloxane or polysiloxane in an addition reaction type polysiloxane release treatment agent shown below). And silicone resins such as a polymer). Examples of the fluorine-based compound constituting the fluorine-based fiber include polytetrafluoroethylene, polychlorotrifluoroethylene, polyvinyl fluoride, polyvinylidene fluoride, tetrafluoroethylene / hexafluoropropylene copolymer, chlorofluoroethylene / Examples thereof include fluorine resins such as vinylidene fluoride copolymers.

  The fiber having a release function by the release treatment of the surface (sometimes referred to as “release treatment fiber”) is not particularly limited as long as the fiber is subjected to the release treatment. As described above, any of a fiber that has been subjected to a release treatment before the formation of the fiber convex structure portion and a fiber that has been subjected to a release treatment after the formation of the fiber convex structure portion may be used. In such a release treatment fiber, the release treatment agent (release treatment agent) used when adding a release function to the fiber by release treatment (release treatment) with a release treatment agent is not particularly limited, For example, a silicone release treatment agent, a fluorine release treatment agent, a long-chain alkyl release treatment agent, or the like can be used. The release treatment agents can be used alone or in combination of two or more. The release treatment agent may be any form of release treatment agent such as a solvent type, a solventless type, or an emulsion type.

  As the release treatment agent, a silicone release treatment agent is suitable from the viewpoint of releasability and cost. The silicone release treatment agent can be appropriately selected from known polysiloxane release treatment agents (silicone release treatment agents) having a polysiloxane polymer as a main component. As the silicone release treatment agent, among them, an addition reaction type polysiloxane release treatment agent can be suitably used. The addition reaction type polysiloxane-based release treatment agent can be cured by addition reaction type crosslinking (curing reaction) to form a peelable film, and can exhibit useful release characteristics. As such an addition reaction type polysiloxane release treatment agent, an addition reaction type polysiloxane release treatment agent shown below [that is, reacts with a group having a Si-H bond in a molecule] A polysiloxane polymer having two or more groups having a property and a polysiloxane polymer having two or more hydrogen atoms bonded to a silicon atom in the molecule (in particular, Si-- And a polysiloxane release treatment composition containing a polysiloxane polymer having two or more silicon atoms having H bonds), and among the polysiloxane release treatment agents, Si A polydimethylsiloxane-based polymer having two or more groups (in particular, vinyl groups) reactive to a group having —H bond, and “-S as a monomer unit in the molecule” (R) (H) O - "(R is a hydrocarbon group) are preferred polydimethylsiloxane release agents according to the polydimethyl siloxane polymer having two or more. The polysiloxane release treatment agent contains known or conventional additives (for example, fillers, antistatic agents, antioxidants, ultraviolet absorbers, plasticizers, colorants (dyes, pigments, etc.)). May be.

  Although it does not restrict | limit especially as a mold release processing method by a peeling processing agent, For example, the peeling processing method by apply | coating a peeling processing agent and performing drying and hardening as needed can be used suitably. In such a mold release treatment method using a release treatment agent, the application method of the release treatment agent is not particularly limited. The method etc. are mentioned. Further, when drying or curing, heat treatment can be performed, and by this heat treatment, an addition reaction type curing reaction occurs, a peelable film is formed, and excellent peeling characteristics are exhibited.

  In addition, the mold release process by a peeling treatment agent is a fiber (fiber before forming a fiber convex structure part) for forming a fiber convex structure part, or a fiber in an already formed fiber convex structure part ( It can be applied to the fiber after forming the fiber convex structure. That is, the fiber convex structure portion may be formed, for example, by using a fiber that has been subjected to a release treatment with a release treatment agent at least at the tip portion as a fiber for forming the fiber convex structure portion. After forming the convex structure portion of the fiber that has not been subjected to the release treatment with the release treatment agent, at least the release portion with the release treatment agent is applied to the tip portion of the fiber located outside the surface of the adhesive layer. It may be formed by performing mold processing.

Further, the coating amount (solid content) of the release treatment agent is not particularly limited as long as it exhibits a good releasability, but it is preferably as small as possible within a range that does not impair the releasability. Specifically, the coating amount (solid content) of the release treatment agent is, for example, 0.01 to 5 g / m ² (preferably 0.05 to ³ g / m ² , more preferably 0.2 to 1 g / m). It can be appropriately selected from the range of ² ). In the release treated fiber, the thickness of the release treatment layer by the release treatment agent is not particularly limited, and is, for example, 0.01 to 5 μm (preferably 0.05 to 3 μm, more preferably 0.2 to 1 μm). ) Is preferable.

  On the other hand, the fiber (fiber material) before the release treatment with the release treatment agent is not particularly limited, and may be any of natural fiber, semi-synthetic fiber, and synthetic fiber. More specifically, examples of the fiber material include cotton fibers, rayon fibers, polyamide fibers [aliphatic polyamide fibers, aromatic polyamide fibers (so-called aramid fibers), etc.], polyester fibers (trade name “Tetron”, etc.) ), Polyacrylonitrile fiber, carbon fiber (carbon fiber), acrylic fiber, polyvinyl alcohol fiber (so-called vinylon fiber), polyethylene fiber, polyimide fiber, polyolefin fiber, silicone fiber, fluorine fiber, etc. It is done. Examples of fiber materials include fibers that have a release function (release fibers; for example, polyolefin fibers, silicone fibers, fluorine fibers, etc.), and fibers that do not have release properties. Any of these may be used, but fibers that do not have a release function are suitable. Specifically, cotton fibers, rayon fibers, polyamide fibers, and polyester fibers can be suitably used as the fiber material. Only one type of fiber material may be used, or two or more types may be used in combination.

  As such fibers (or fiber materials), short fibers can be suitably used. If the length of the fiber is increased, the adhesive force of the adhesive tape or sheet to the adherend is reduced, which is not preferable. The length of the fiber (or fiber material) is desirably about 0.1 to 5 mm (preferably 0.3 to 5 mm, more preferably 0.3 to 2 mm). If the length of the fiber is too short, the pressure applied when the pressure-sensitive adhesive layer is adhered to the adherend may be low, which is not preferable because reworkability and workability for correcting the attachment position are reduced. Further, if the length of the fiber is too short, it is difficult to manufacture and expensive, which is not preferable from the viewpoint of cost.

  The thickness of the fiber (or fiber material) is not particularly limited, but is selected from a range of, for example, about 0.1 to 20 denier (preferably 0.5 to 15 denier, more preferably 1 to 6 denier). can do. If the thickness of the fiber is too large, the pressure applied when the pressure-sensitive adhesive layer is adhered to the adherend is increased due to a decrease in flexibility, which is not preferable. On the other hand, if the thickness of the fiber is too thin, the effect of reducing the initial adhesive strength is lowered, and the reworkability and the workability for correcting the attachment position are lowered.

  The method for forming the fiber convex structure portion (particularly, the fiber raised portion) is not particularly limited, but as shown below, a flocking method (particularly, an electrostatic flocking method) is preferably used. it can. As the electrostatic flocking processing method, any of an up method, a down method, and a side method may be used. In addition, when forming a fiber convex structure part in the predetermined site | part of the surface of an adhesive layer by the flocking processing method, it is in the position corresponding to the predetermined site | part which forms the fiber convex structure part in the surface of an adhesive layer. It is preferable to use a release substrate (particularly a release film) having a hole. Moreover, when forming a fiber convex-shaped structure part in the wall surface of the recessed part of an adhesive layer by a flocking processing method, a hole is provided in the position corresponding to the recessed part (recessed part which forms a fiber convex-shaped structure part) of an adhesive layer. It is preferable to use a release substrate (particularly a release film) that has the same. Such a release substrate can also be used as a release liner.

(Adhesive layer)
The pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer is not particularly limited, and examples thereof include rubber-based pressure-sensitive adhesives, acrylic pressure-sensitive adhesives, polyester-based pressure-sensitive adhesives, urethane-based pressure-sensitive adhesives, polyamide-based pressure-sensitive adhesives, epoxy-based pressure-sensitive adhesives, and vinyl alkyls. Known pressure-sensitive adhesives such as ether pressure-sensitive adhesives, silicone pressure-sensitive adhesives, and fluorine-based pressure-sensitive adhesives can be used. Further, the adhesive may be a hot melt adhesive. An adhesive can be used individually or in combination of 2 or more types. The pressure-sensitive adhesive may be any type of pressure-sensitive adhesive such as an emulsion-based pressure-sensitive adhesive, a solvent-based pressure-sensitive adhesive, an oligomer-based pressure-sensitive adhesive, and a solid pressure-sensitive adhesive.

  In addition to the polymer component such as an adhesive component (base polymer), the adhesive is a crosslinking agent (for example, a polyisocyanate-based crosslinking agent, an alkyl etherified melamine compound-based crosslinking agent, etc.) depending on the type of the adhesive. ), Tackifiers (for example, rosin derivative resins, polyterpene resins, petroleum resins, phenol resins, etc.), plasticizers, fillers, anti-aging agents, and other suitable additives may be included. When the pressure-sensitive adhesive layer is cross-linked when forming the pressure-sensitive adhesive layer, a heat-crosslinking method by heating, a UV-crosslinking method by UV irradiation (UV cross-linking method), an electron beam cross-linking method by electron beam irradiation (EB cross-linking method), room temperature, etc. Any of the natural curing methods of curing naturally with

  Adhesives include natural rubber and various synthetic rubbers (eg polyisoprene rubber, styrene / butadiene rubber, styrene / isoprene / styrene block copolymer rubber, styrene / butadiene / styrene block copolymer rubber, recycled rubber, butyl rubber) , Polyisobutylene, etc.) based rubber-based adhesive; acrylic polymer (homopolymer or copolymer) using one or more (meth) acrylic acid alkyl esters as monomer components An acrylic pressure-sensitive adhesive having a base polymer can be preferably used.

Examples of the (meth) acrylic acid alkyl ester in the acrylic pressure-sensitive adhesive include, for example, methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, isopropyl (meth) acrylate, (meth ) Butyl acrylate, isobutyl (meth) acrylate, s-butyl (meth) acrylate, t-butyl (meth) acrylate, pentyl (meth) acrylate, hexyl (meth) acrylate, heptyl (meth) acrylate , Octyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, isooctyl (meth) acrylate, nonyl (meth) acrylate, isononyl (meth) acrylate, decyl (meth) acrylate, (meth) acrylic acid Isodecyl, undecyl (meth) acrylate, dodecyl (meth) acrylate, (Meth) acrylic acid tridecyl, (meth) acrylic acid tetradecyl, (meth) acrylic acid pentadecyl, (meth) acrylic acid hexadecyl, (meth) acrylic acid heptadecyl, (meth) acrylic acid octadecyl, (meth) acrylic acid nonadecyl, (meta And (meth) acrylic acid C _1-20 alkyl ester such as eicosyl acrylate [preferably (meth) acrylic acid C _4-18 alkyl (linear or branched alkyl) ester]. The (meth) acrylic acid alkyl ester can be appropriately selected according to the intended tackiness and the like. The (meth) acrylic acid alkyl ester can be used alone or in combination of two or more.

  Moreover, in the said acrylic adhesive, even if the (meth) acrylic-acid alkylester and the other monomer (copolymerizable monomer) copolymerizable with the said (meth) acrylic-acid alkylester as needed are used together Good. Examples of such copolymerizable monomers include (meth) acrylic acid, itaconic acid, maleic acid, fumaric acid, crotonic acid, isocrotonic acid and other carboxyl group-containing monomers or anhydrides thereof; sodium vinyl sulfonate, etc. Sulfonic acid group-containing monomers of styrene; aromatic vinyl compounds such as styrene and substituted styrene; cyano group-containing monomers such as acrylonitrile; olefins such as ethylene, propylene and butadiene; vinyl esters such as vinyl acetate; Amide group-containing monomers such as acrylamide, methacrylamide, N-vinylpyrrolidone, N, N-dimethyl (meth) acrylamide; hydroxyl group-containing monomers such as hydroxyalkyl (meth) acrylate and glycerol dimethacrylate; ) Aminoethyl acrylate, (meth) a Amino group-containing monomers such as liloylmorpholine; Imido group-containing monomers such as cyclohexylmaleimide and isopropylmaleimide; Epoxy group-containing monomers such as glycidyl (meth) acrylate and methyl glycidyl (meth) acrylate; 2 -Isocyanate group-containing monomers such as methacryloyloxyethyl isocyanate. Examples of the copolymerizable monomer include triethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, ethylene glycol di (meth) acrylate, tetraethylene glycol di (meth) acrylate, and neopentyl glycol di Multifunctional such as (meth) acrylate, 1,6-hexanediol di (meth) acrylate, trimethylolpropane tri (meth) acrylate, pentaerythritol tri (meth) acrylate, dipentaerythritol hexa (meth) acrylate, divinylbenzene And a copolymerizable monomer (polyfunctional monomer). A copolymerizable monomer can be used individually or in combination of 2 or more types.

  As a method for forming the pressure-sensitive adhesive layer, a known or conventional forming method can be employed. For example, in the case of a pressure-sensitive adhesive tape or sheet having a pressure-sensitive adhesive tape or a base material for sheet, A method of applying an adhesive on a base material (adhesive tape or base material for sheet) (application method), an adhesive is applied on a release film such as a release liner, and an adhesive layer is formed. Examples thereof include a method (transfer method) of transferring the agent layer onto the substrate. In the case of a substrate-less pressure-sensitive adhesive tape or sheet that does not have a pressure-sensitive adhesive tape or sheet substrate, the pressure-sensitive adhesive layer is formed by applying a pressure-sensitive adhesive on the release surface of a release liner as a support. Examples thereof include a method (application method).

  It does not restrict | limit especially as thickness of an adhesive layer, For example, it can select from the range of about 1-1000 micrometers (preferably 10-500 micrometers).

  In addition, the adhesive layer may be partially formed with a recess. Such a recess may be a depression, but is preferably a hole (through hole), and a hole is particularly preferable among the holes. In such a recess, the shape of the entire recess, the shape of the opening on the surface of the adhesive layer of each recess, the total area of the opening on the surface of the adhesive layer of the recess, the area of the opening on the surface of the adhesive layer of each recess For example, it can correspond to the fiber convex structure. In addition, when a recessed part is a depression part, the depth in particular is not restrict | limited, The depth corresponds to 1% or more (for example, 1-99%, preferably 30-90%) of the thickness of an adhesive layer. It can select suitably from the range.

  In addition, as shown below, when the adhesive tape or sheet is a base-less double-sided adhesive tape or sheet, a depressed portion as a recess is formed on at least one surface of the adhesive layer. Preferably, it is the surface of one side of an adhesive layer. Furthermore, when the pressure-sensitive adhesive tape or sheet is a double-coated pressure-sensitive adhesive tape or sheet with a base material as shown below, the recess (such as a depressed portion or a hole) is at least one of the pressure-sensitive adhesive layers. It can be formed on the surface, and is preferably the surface of the pressure-sensitive adhesive layer on one side.

  In the case where the concave portion is a hole portion, a method for forming the hole portion is, for example, a known or conventional hole portion forming machine [in particular, a convex structure (protruding structure) of various shapes and relative to the convex structure. Punching method using a drilling machine having a concave structure to be formed], a punching method using heat or light (for example, a method using a thermal head, a halogen lamp, a xenon lamp, a flash lamp, a laser beam, etc.), a mold ( For example, a molding method using a mold having a convex portion or the like may be used. In addition, when a recessed part is a depression part, as a method of forming a depression part, the formation method similar to a hole part is employable.

  As described above, when forming the fiber convex structure portion in the concave portion of the pressure-sensitive adhesive layer, the hole portion is provided at a position corresponding to the predetermined portion where the fiber convex structure portion is formed on the surface of the pressure-sensitive adhesive layer. When using the peeling base material (especially peeling film) which is carrying out, it is preferable to form the recessed part of an adhesive layer with the hole of the said peeling base material. For example, on the surface of the pressure-sensitive adhesive layer where no recess is formed, a peeling base material having no holes is stacked and laminated, and punching processing such as perforation is performed from the side of the peeling base material using a hole forming machine. By carrying out the above, it is possible to simultaneously produce a concave portion (particularly, a hole portion by perforation) of the pressure-sensitive adhesive layer and a hole portion of the peeling substrate. In such a method, it can form easily so that the recessed part of an adhesive layer and the hole of a peeling base material may have a corresponding positional relationship. In other words, the wall surface of the concave portion of the pressure-sensitive adhesive layer and the wall surface of the hole portion of the release substrate can be produced in a continuously formed configuration. Therefore, the wall surface of the concave portion of the pressure-sensitive adhesive layer is opened (opened) through the hole of the release substrate, and, for example, from the side of the release substrate through the hole of the release substrate, By performing flocking on the wall surface of the recess, fibers protrude from the wall surface to the outside of the surface of the pressure-sensitive adhesive layer (the surface on the side of the peeling substrate having holes) from the wall surface. It is possible to efficiently form a fiber convex structure having a structure.

  In the punching process when forming a hole as a concave portion of the pressure-sensitive adhesive layer, the pressure-sensitive adhesive tape or sheet is a substrate-less type pressure-sensitive adhesive tape or sheet, and both surfaces of the pressure-sensitive adhesive layer are protected by a release liner. In this case, the base-less type double-sided pressure-sensitive adhesive tape or the entire sheet may be punched, but a half-cut type punching process is performed so that a cut line is not formed only on one release liner. It is preferable.

(Support)
As the support for supporting the pressure-sensitive adhesive layer, the pressure-sensitive adhesive tape or sheet is a base material (the pressure-sensitive adhesive tape or the base material for the sheet) when the pressure-sensitive adhesive tape or sheet is a pressure-sensitive adhesive tape or sheet having a pressure-sensitive adhesive layer on one or both sides On the other hand, in the case of a double-sided pressure-sensitive adhesive tape or sheet of a base material-less type, a release liner (separator) can be used. In the case where the pressure-sensitive adhesive tape or sheet is a pressure-sensitive adhesive tape or sheet having a base material type on one or both surfaces, the pressure-sensitive adhesive layer is formed on one or both surfaces of the base material as a support. In addition, a fiber convex structure is formed on the surface of the pressure-sensitive adhesive layer formed on one side or both sides of the base material and the wall surface of the concave portion, and the surface of the pressure-sensitive adhesive layer is a release surface on the back side of the base material, It may be protected by a release liner. On the other hand, when the pressure-sensitive adhesive tape or sheet is a substrate-less double-sided pressure-sensitive adhesive tape or sheet, the release liner serves as a support for the pressure-sensitive adhesive layer, and the fiber convex structure is formed on the surface of the pressure-sensitive adhesive layer or on the concave wall surface. Is formed. In this case, when the recessed part formed in an adhesive layer is a depression part, the depression part as a recessed part can be formed in any one adhesive surface of an adhesive layer. Note that the release liner as the support supports the pressure-sensitive adhesive layer and protects the surface of the pressure-sensitive adhesive layer until the pressure-sensitive adhesive tape or sheet is used.

(Base material)
Examples of the base material (adhesive tape or base material for sheet) include plastic base materials such as plastic films and sheets; metal base materials such as metal foils and metal plates; paper (quality paper, Japanese paper, craft paper) Paper base materials such as glassine paper, synthetic paper, top coat paper, etc .; fiber base materials such as cloth, nonwoven fabric, and net; rubber base materials such as rubber sheets; foams such as foam sheets, etc. Thin leaves can be used. The substrate may have a single layer form or may have a laminated form. For example, as the base material, a plastic base material and another base material (paper base material, etc.) are laminated (2-3 layers composite) by lamination or coextrusion. Also good.

  The substrate is preferably a plastic film or sheet. Examples of such a plastic film or sheet material (plastic material) include α-polyethylene (PE), polypropylene (PP), ethylene-propylene copolymer, ethylene-vinyl acetate copolymer (EVA), and the like. Olefin resins containing olefin as a monomer component; polyester resins such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polybutylene terephthalate (PBT); polyvinyl chloride (PVC); vinyl acetate resin; polyphenylene sulfide ( PPS); amide resins such as polyamide (nylon) and wholly aromatic polyamide (aramid); polyimide resins; polyether ether ketone (PEEK) and the like. The plastic material may be used alone, or may be used in a mixed state in which two or more kinds are combined. The plastic film or sheet may be an unstretched type or a stretched type subjected to a uniaxial or biaxial stretching process.

  In addition, for the base material, if necessary, an inorganic filler (for example, titanium oxide, zinc oxide, etc.), an anti-aging agent (for example, an amine-based anti-aging agent, a quinoline-based anti-aging agent, a hydroquinone-based anti-aging agent, Phenolic antioxidants, phosphorus antioxidants, phosphite antioxidants, antioxidants, UV absorbers (eg salicylic acid derivatives, benzophenone UV absorbers, benzotriazole UV absorbers, hindered amines) And other additives such as lubricants, plasticizers, and colorants (for example, pigments, dyes, etc.).

  One or both sides of the base material are subjected to appropriate surface treatments such as physical treatment such as corona treatment and plasma treatment, and chemical treatment such as primer for the purpose of improving adhesion with the adhesive layer. It may be.

  As thickness of a base material, it can select from the range of about 10-300 micrometers, for example, Preferably about 30-200 micrometers.

(Release liner)
Examples of the release liner (adhesive tape or release liner for sheet) include, in addition to a substrate having a release treatment layer (release treatment layer) with a release treatment agent on at least one surface, a fluorine-based polymer (eg, polytetrafluoroethylene). Low adhesive substrates made of fluoroethylene, polychlorotrifluoroethylene, polyvinyl fluoride, polyvinylidene fluoride, tetrafluoroethylene / hexafluoropropylene copolymer, chlorofluoroethylene / vinylidene fluoride copolymer, etc. A low-adhesive substrate made of an adhesive polymer (for example, an olefin resin such as polyethylene or polypropylene) can be used.

  As the release liner, for example, a release liner in which a release treatment layer is formed on at least one surface of the release liner substrate can be suitably used. Examples of such release liner substrates include polyester films (polyethylene terephthalate films, etc.), olefin resin films (polyethylene films, polypropylene films, etc.), polyvinyl chloride films, polyimide films, polyamide films (nylon films), rayon films. In addition to plastic base film (synthetic resin film) such as paper, paper (quality paper, Japanese paper, kraft paper, glassine paper, synthetic paper, topcoat paper, etc.), these can be laminated and co-extruded. Examples include layered materials (2 to 3 layer composites).

  On the other hand, the release treatment agent constituting the release treatment layer is not particularly limited, and for example, a silicone release treatment agent, a fluorine release treatment agent, a long-chain alkyl release treatment agent, or the like can be used. The release treatment agents can be used alone or in combination of two or more.

  As the release treatment agent, a silicone release treatment agent is suitable from the viewpoint of releasability and cost. The silicone release treatment agent can be appropriately selected from known polysiloxane release treatment agents (silicone release treatment agents) having a polysiloxane polymer as a main component. As the silicone release treatment agent, among them, an addition reaction type polysiloxane release treatment agent can be suitably used. The addition reaction type polysiloxane-based release treatment agent can be cured by addition reaction type crosslinking (curing reaction) to form a peelable film, and can exhibit useful release characteristics.

  The addition reaction type polysiloxane-based release treatment agent includes a group having reactivity with a group having a Si—H bond (specifically, an alkenyl group such as a vinyl group or a hexenyl group). A polysiloxane polymer having two or more “groups having reactivity with a group having a Si—H bond” may be simply referred to as an “alkenyl group”) and a molecule; Polysiloxane polymer having 2 or more hydrogen atoms bonded to silicon atoms (particularly, polysiloxane polymer having 2 or more silicon atoms having Si-H bonds in the molecule) Can be used.

  In the present invention, “Si—H bond” means “bond between silicon atom (Si) and hydrogen atom (H)”.

  In addition, in the polysiloxane polymer having two or more alkenyl groups, examples of the polysiloxane polymer forming the main chain or skeleton include polydimethylsiloxane polymer, polydiethylsiloxane polymer, polymethyl Polyalkylalkylsiloxane polymers such as ethylsiloxane-based polymers, polyalkylarylsiloxane-based polymers, and copolymers in which a plurality of silicon atom-containing monomer components are used [for example, poly (dimethylsiloxane-diethylsiloxane), etc. And the like, and polydimethylsiloxane polymers are preferred.

  On the other hand, in a polysiloxane polymer having two or more silicon atoms having Si-H bonds in the molecule, the silicon atoms having Si-H bonds include silicon atoms in the main chain and silicon in the side chain. Any of the atoms may be included, that is, it may be included as a constituent unit of the main chain, or may be included as a constituent unit of the side chain. Note that the number of Si-H bond silicon atoms (silicon atoms to which hydrogen atoms are bonded) is not particularly limited as long as it is two or more.

  As a polysiloxane polymer having two or more silicon atoms having Si—H bonds in the molecule, “—Si (R) (H) O—” (R is a hydrocarbon group) as a monomer unit in the molecule. ) Is preferable, and polydimethylhydrogensiloxane polymers [for example, poly (dimethylsiloxane-methylsiloxane) and the like] are preferable.

  In the polysiloxane release treatment agent, a polysiloxane polymer having two or more silicon atoms having Si—H bonds in the molecule has a function as a crosslinking agent.

  The amount of the polysiloxane polymer having two or more Si-H bonded silicon atoms in the molecule is not particularly limited. For example, the polysiloxane polymer having two or more Si-H bonded silicon atoms in the molecule is used. The number of moles of silicon atoms of the Si—H bond in the polymer (sometimes referred to as “number of moles (X)”) and the number of moles of alkenyl groups in the polysiloxane polymer having two or more alkenyl groups (“number of moles ( Y) ”may be referred to as the ratio of mole number (X)> number of moles (Y), but the number of moles (X) / number of moles (Y) is 0.8 to 3.0 ( You may select from the range of the ratio used as about 1.1-1.8) preferably.

  When curing a polysiloxane polymer having two or more alkenyl groups in the molecule with a polysiloxane polymer (crosslinking agent) having two or more silicon atoms having Si-H bonds in the molecule A catalyst can be used as the catalyst, and as the catalyst, a platinum-based catalyst (for example, platinum-based compounds such as platinum fine particles, chloroplatinic acid, or a derivative thereof) can be preferably used. The amount of the catalyst used is not particularly limited. For example, the catalyst may be selected from a range of 0.1 to 1000 ppm (preferably 1 to 100 ppm) based on a polysiloxane polymer having two or more alkenyl groups in the molecule. it can.

  In the present invention, the polysiloxane release treatment agent includes a polydimethylsiloxane polymer having two or more vinyl groups as alkenyl groups in the molecule, and “—Si (R) (H) as a monomer unit in the molecule. A polydimethylsiloxane-based release agent based on a polydimethylhydrogensiloxane-based polymer having two or more “O—” (R is a hydrocarbon group) can be suitably used.

  The polysiloxane-based release treating agent has the above-described constituent components (for example, a polydimethylsiloxane-based polymer having two or more alkenyl groups in the molecule, and two or more silicon atoms having Si—H bonds in the molecule). Can be prepared by mixing an organic solvent as required. The polysiloxane release treatment agent can be used in a state where a polymer component such as a polysiloxane polymer is dissolved in an organic solvent. The polysiloxane release treatment agent contains known or conventional additives (for example, fillers, antistatic agents, antioxidants, ultraviolet absorbers, plasticizers, colorants (dyes, pigments, etc.)). May be.

  Examples of such a polysiloxane release treatment agent include a trade name “TPR6600” (manufactured by GE Toshiba Silicone), a trade name “KS-778” (manufactured by Shin-Etsu Chemical Co., Ltd.), and a trade name “KS-837” (Shin-Etsu). Chemical Co., Ltd.) are commercially available.

  The release treatment layer can be formed by applying a release treatment agent to a predetermined surface (at least one surface) of the release liner base material and then performing a heating process for drying, curing reaction, or the like. In the heating step for drying, curing reaction, etc., a known or conventional heating method (for example, a method using a hot air dryer) can be used. The addition reaction type polysiloxane release treatment agent is applied to a predetermined surface of a release liner substrate, and then subjected to an addition reaction type curing reaction in a drying process or a curing reaction process to form a release film. By forming, excellent peeling characteristics can be exhibited.

Moreover, it is important to apply the release treatment agent in an appropriate application amount. If the coating amount of the release treatment agent is too small, the peeling force (force required for peeling) becomes large and causes a practical problem. On the other hand, if it is too much, the cost becomes high and it is economically disadvantageous. The appropriate coating amount (solid content) of the release treatment agent can be appropriately selected according to the type of pressure-sensitive adhesive to be used, and is, for example, 0.01 to 5 g / m ² (preferably 0.05 to ³ g). / M ² , more preferably 0.2 to 1 g / m ² ).

  The thickness of the release liner, the thickness of the release liner substrate, the thickness of the release treatment layer, and the like are not particularly limited, and can be appropriately selected according to the shape of the fiber convex structure.

  In particular, when the release liner is used to protect the surface of the pressure-sensitive adhesive layer on the side where at least a part of the fibers of the fiber convex structure portion is located outside the surface of the pressure-sensitive adhesive layer, as the release liner, Since the surface of the pressure-sensitive adhesive layer is partially formed with a fiber convex structure part, or a portion or part where at least a part of the fiber of the fiber convex structure part protrudes, the fiber on the surface of the pressure-sensitive adhesive layer A release liner having recesses (holes, depressions, etc.) at the site corresponding to the site where the is located can be suitably used, and in particular, the surface of the pressure-sensitive adhesive layer as shown in FIG. A release liner having a hole (particularly a perforated part) in a part corresponding to the fiber convex structure part, or a part in a part corresponding to a concave part of the pressure-sensitive adhesive layer as shown in FIG. A release liner having a perforated portion is preferred. As a release liner having such a hole, in order to protect the fibers of the fiber convex structure portion from falling down, at least the thickness of the outer peripheral region of the hole (particularly the perforated portion) is such that the fiber convex structure portion However, the tip of the fiber located outside the surface of the pressure-sensitive adhesive layer is at least separated by the release treatment agent. Since the mold has been processed, the thickness is such that the tip portion of the fiber located outside the surface of the pressure-sensitive adhesive layer is located outside the outer surface of the release liner through the recess of the release liner It may be.

  As a method for forming a concave portion (particularly a perforated portion) of a release liner, for example, a well-known or conventional concave portion forming machine [among others, a convex structure (protruded structure) of various shapes and a relative to the convex structure. A method using a punching machine having a concave structure], a method using heat or light (for example, a method using a thermal head, a halogen lamp, a xenon lamp, a flash lamp, a laser beam, etc.), a mold (particularly, having a convex part). And a method by molding using a mold).

(Adhesive tape or sheet)
As the pressure-sensitive adhesive tape or sheet, when the fiber convex structure is formed on the surface of the pressure-sensitive adhesive layer, (1a) the pressure-sensitive adhesive layer is formed on both surfaces of the base material as a support, The surface of the pressure-sensitive adhesive layer on at least one side of the fiber partially has a fiber convex structure portion, and the fiber tip portion located outside the surface of the pressure-sensitive adhesive layer in the fiber convex structure portion, At least a double-sided pressure-sensitive adhesive tape or sheet with a base material having a release function, (1b) an adhesive layer is formed on one side of the base material as a support, and the adhesive layer A fiber convex structure part is partially formed on the surface, and the tip part of the fiber located outside the surface of the pressure-sensitive adhesive layer in the fiber convex structure part has at least a release function. Type of adhesive tape or sheet with a base material (single-sided adhesive tape) (1c) The pressure-sensitive adhesive layer partially has a fiber convex structure portion on at least one surface, and is located outside the surface of the pressure-sensitive adhesive layer in the fiber convex structure portion. A base-less type double-sided pressure-sensitive adhesive tape or sheet having a structure in which the tip portion of the fiber has at least a releasing function and both surfaces of the pressure-sensitive adhesive layer are protected by one or two release liners It can be illustrated.

  In addition, as the pressure-sensitive adhesive tape or sheet, when a fiber convex structure is formed on the concave wall surface of the pressure-sensitive adhesive layer (side surface on the concave side of the pressure-sensitive adhesive layer), (2a) the pressure-sensitive adhesive layer is a base as a support. Formed on both sides of the material, and a recess is partially formed in the pressure-sensitive adhesive layer on at least one side of the base material, and fibers protrude from the surface of the pressure-sensitive adhesive layer to the outside of the wall surface of the recess. A fiber convex structure portion having a structure (form) that is present, and a fiber tip portion located outside the surface of the pressure-sensitive adhesive layer in the fiber convex structure portion has at least a release function. A double-sided pressure-sensitive adhesive tape or sheet with a base material having a configuration, (2b) a pressure-sensitive adhesive layer is formed on one side of the base material as a support, and a concave portion is partially formed in the pressure-sensitive adhesive layer, and The fiber protrudes outside the surface of the adhesive layer on the wall of the recess. A structure having a fiber convex structure portion having a structure (form), and at least a tip portion of the fiber located outside the surface of the pressure-sensitive adhesive layer in the fiber convex structure portion has a release function. Type of adhesive tape or sheet with a base material (single-sided adhesive tape or sheet), (2c) a recess is partially formed in the adhesive layer, and fibers are formed on the wall surface of the recess outside the surface of the adhesive layer. Has a fiber convex structure part with a protruding structure (form), and the fiber tip portion located outside the surface of the adhesive layer in the fiber convex structure part has at least a release function. Furthermore, a base-less type double-sided pressure-sensitive adhesive tape or sheet having a configuration in which both surfaces of the pressure-sensitive adhesive layer are protected by one or two release liners can be exemplified.

  Thus, the pressure-sensitive adhesive tape or sheet may have a form of a pressure-sensitive adhesive tape or sheet in which only one surface is a pressure-sensitive adhesive surface, and has a form of a pressure-sensitive adhesive tape or sheet in which both surfaces are pressure-sensitive adhesive surfaces. It may be. Further, in the case of a double-sided pressure-sensitive adhesive tape or sheet, as described above, the front end portion of the fiber where only at least a part of the fiber is located on the outer side of the pressure-sensitive adhesive layer on the outer side, At least a fiber convex structure having a releasing function may be formed on the surface of the pressure-sensitive adhesive layer or on the wall surface of the concave portion, and at least a part of the fiber is positioned outside both the pressure-sensitive adhesive surfaces. And the fiber convex structure part of the form in which the tip part of the fiber located outside the surface of the pressure-sensitive adhesive layer has at least a release function is formed on the surface of the pressure-sensitive adhesive layer or the concave wall surface. May be.

  The pressure-sensitive adhesive tape or sheet of the present invention is preferably a double-sided pressure-sensitive adhesive tape or sheet. In particular, as shown in FIGS. Is preferred. 3 to 4 are schematic sectional views partially showing other examples of the pressure-sensitive adhesive tape or sheet of the present invention. In FIG. 3, 12 is an adhesive tape or sheet, 22 is an adhesive layer, 22a is the surface of the adhesive layer 22, 32 is an adhesive tape or sheet substrate (substrate), 42 is a release liner, 42a is a release liner 42. , 52 is a fiber raising part, 52a is a part having a releasing function in the fiber raising part 52, and 62 is an adhesive layer. The pressure-sensitive adhesive tape or sheet 12 shown in FIG. 3 has a pressure-sensitive adhesive layer 22 and a pressure-sensitive adhesive layer 62 formed on both surfaces of a base material 32 as a support, respectively, and the pressure-sensitive adhesive layer 22 is protected by a release liner 42. The surface 22a of the pressure-sensitive adhesive layer 22 is provided with a fiber raising portion 52 as a fiber convex structure portion at a portion corresponding to the hole portion 42a of the release liner 42. The fiber raising part 52 has a part 52a having a release function on the tip part side, and the part 52a having the release function is obtained by a release treatment with a release treatment agent. Is formed. The part 52 a having a releasing function in the fiber raising part 52 is a part located outside the outer surface of the release liner 42 through the hole 42 a of the release liner 42. That is, the fiber raised portion 52 is formed in a form in which the tip portion is located outside the outer surface of the release liner 42 through the hole 42 a of the release liner 42, and from the outer surface of the release liner 42. Further, the tip portion of the fiber located outside has a structure in which the release treatment is performed with the release treatment agent.

  4, 13 is an adhesive tape or sheet, 23 is an adhesive layer, 23a is a recess of the adhesive layer 23, 23a1 is a wall surface of the recess 23a of the adhesive layer 23, 23b is a surface of the adhesive layer 23, 33 Is a base material for adhesive tape or sheet (base material), 43 is a release liner having a hole, 43a is a hole in the release liner 43, 53 is a fiber raising portion, and 53a has a release function in the fiber raising portion 53. , 63 is an adhesive layer. The pressure-sensitive adhesive tape or sheet 13 shown in FIG. 4 has a pressure-sensitive adhesive layer 23 and a pressure-sensitive adhesive layer 63 formed on both surfaces of a base material 33 as a support, respectively, and the pressure-sensitive adhesive layer 23 is in the form of a through hole. It has a recess 23a (however, the opening on the base material side is closed by the base material 33). The recess 23 a is partially formed in the pressure-sensitive adhesive layer 23. That is, the opening of the recess 23 a is partially formed on the surface of the pressure-sensitive adhesive layer 23. The pressure-sensitive adhesive layer 23 has a structure in which the surface 23b is protected by a release liner 43 having a hole 43a, and the hole 43a of the release liner 43 and the recess 23a of the pressure-sensitive adhesive layer 23. And have a corresponding positional relationship. Specifically, the wall surface of the hole 43a and the wall surface of the recess 23a are configured to be continuously formed. Furthermore, a fiber raised portion 53 is provided as a fiber convex structure portion on the wall surface 23a1 of the concave portion 23a of the pressure-sensitive adhesive layer 23. The fiber raised portion 53 is formed from the wall surface 23a1 of the concave portion 23a. It has a structure in which fibers stand up and protrude outward from the surface 23b (that is, the side of the release liner 43 having the hole 43a). Moreover, the said fiber raising part 53 has the site | part 53a which has a mold release function in the front-end | tip part side, and the site | part 53a which has this mold release function is mold release by a peeling process agent. It is formed by processing. The portion 53 a having a releasing function in the fiber raising portion 53 is a portion located outside the outer surface of the release liner 43 through the hole 43 a of the release liner 43. That is, the fiber raised portion 53 is formed in such a form that the tip portion is located outside the outer surface of the release liner 43 through the hole 43 a of the release liner 43, and from the outer surface of the release liner 43. Further, the tip portion of the fiber located outside has a structure in which the release treatment is performed with the release treatment agent.

  The pressure-sensitive adhesive tape or sheet may be a pressure-sensitive adhesive tape (rolled body or wound body) wound in a roll shape, or may be a pressure-sensitive adhesive sheet in the form of a single layer or laminated sheets. In the present invention, in particular, since the fiber tip portion located outside the surface of the pressure-sensitive adhesive layer in the fiber convex structure portion has at least a release function, for example, as shown in FIGS. Thus, even if there is only one release liner that protects the adhesive surface, it can be made into an adhesive tape that is wound into a roll, and its rewinding property is good. In this case, the self-rear surface is a surface on the release liner side laminated on the pressure-sensitive adhesive layer surface on the pressure-sensitive adhesive surface side where the fiber tip portion of the fiber convex structure portion is located outside.

  As described above, in the pressure-sensitive adhesive tape or sheet, the fiber convex structure portion is formed on the pressure-sensitive adhesive layer on at least one side of the support body in a form in which at least a part of the fiber is located outside the surface of the pressure-sensitive adhesive layer. Therefore, the pressure-sensitive adhesive layer surface (adhesive surface) on the side where at least a part of the fiber is located outside the surface is bonded to the adherend with a small load. At this time, temporary bonding can be performed, and after applying a large load after reapplying or correcting the pasting position, it can be firmly bonded. The size of the load applied during temporary bonding is not particularly limited, and the height of the fiber located on the outer side of the pressure-sensitive adhesive layer surface (length from the pressure-sensitive adhesive layer surface to the tip), fiber It can be controlled by the fiber thickness of the convex structure part, the type of material, and the like. That is, the adhesive force immediately after the adhesive tape or sheet is attached can be controlled to a desired size by the fiber convex structure.

  The pressure-sensitive adhesive tape or sheet of the present invention has a predetermined portion in the pressure-sensitive adhesive layer on at least one surface of the support (a predetermined portion on the surface of the pressure-sensitive adhesive layer or a concave portion formed in a predetermined portion of the pressure-sensitive adhesive layer). It can be manufactured by forming the fiber convex structure on a wall surface or the like. Specifically, using a flocking method, by applying flocking to a predetermined part of the pressure-sensitive adhesive layer on at least one surface of the support, at least a part of the fiber is applied to the predetermined part of the pressure-sensitive adhesive layer. A fiber convex structure part in which a part of the fiber is located outside the surface of the pressure-sensitive adhesive layer and the tip portion of the fiber located outside the surface of the pressure-sensitive adhesive layer has at least a releasing function. Can be produced to produce a pressure-sensitive adhesive tape or sheet partially having a fiber convex structure in the pressure-sensitive adhesive layer. In the flocking process, as a fiber, a predetermined part (for example, a full length, a tip part, at least a tip part, etc.) is previously subjected to a release treatment with a release treatment agent, or the fiber itself has a release function. By performing flocking processing using the fibers that are used, the fiber convex structure portion may have at least a mold release function at the tip portion of the fiber located outside the surface of the pressure-sensitive adhesive layer. However, after the fiber convex structure part is partially formed on the pressure-sensitive adhesive layer by performing flocking using fibers that have not been subjected to the release treatment with the release treatment agent, A fiber in which the fiber convex structure portion is located outside the surface of the pressure-sensitive adhesive layer by subjecting a predetermined portion (at least the tip portion) of the predetermined fiber in the shaped structure portion to a release treatment with a release treatment agent At least the tip of And a type function (has a release-treated structure with a release treatment agent) is preferred. That is, as a method for producing the pressure-sensitive adhesive tape or sheet of the present invention, using the flocking method, by applying flocking to the surface of the pressure-sensitive adhesive layer on at least one surface of the support, Partially after the fiber convex structure portion is formed in a form in which at least a part of the fiber is located outside the surface of the pressure-sensitive adhesive layer, further, from the surface of the pressure-sensitive adhesive layer in the fiber convex structure portion Also suitable is a method for producing an adhesive tape or sheet in which the tip portion of the fiber located outside is at least subjected to a release treatment with a release treatment agent. Of course, as a fiber, using a fiber having a release function at a predetermined site in advance, a flocking process is performed on the surface of the pressure-sensitive adhesive layer on at least one surface of the support. The adhesive tape or sheet is formed by partially forming a fiber convex structure portion on the pressure-sensitive adhesive layer in a form in which at least a part of the fiber is located outside the surface of the pressure-sensitive adhesive layer. May be.

  As such a flocking method, an electrostatic flocking method is particularly suitable. In addition, as an electrostatic flocking processing method, for example, a flocked object having an adhesive layer is set to one electrode so as to be a counter electrode, a DC high voltage is applied thereto, and a gap between the electrodes is set. Flock (fiber) is supplied, and coulomb force causes the flock to fly along the lines of electric force so that it strikes the surface of the object to be transplanted (such as the surface of the pressure-sensitive adhesive layer or the wall surface of the concave portion of the pressure-sensitive adhesive layer). The processing method etc. which perform flocking by this are mentioned. Such an electrostatic flocking method is not particularly limited as long as it is a known electrostatic flocking method. For example, in “Fiber” Vol. 34, No. 6 (1982-6) Any of the up method, the down method, and the side method as described in "."

  When a fiber convex structure is formed on a predetermined part of the pressure-sensitive adhesive layer (a predetermined part on the surface, a wall surface of a concave part, etc.) by a flocking method (particularly, electrostatic flocking method), as described above. In addition, it is preferable to use a release substrate having at least one surface as a release surface and having a hole (sometimes referred to as a “release substrate having a hole”). When a release substrate having a hole is used, the fiber convex structure can be efficiently and easily formed at a predetermined site such as the surface of the pressure-sensitive adhesive layer or the wall surface of the recess. Specifically, in a state where a peeling substrate having a hole at a position corresponding to a predetermined portion forming a fiber convex structure portion in the pressure-sensitive adhesive layer is superimposed on the surface of the pressure-sensitive adhesive layer, By applying a flocking process (especially electrostatic flocking process) to a predetermined part of the agent layer, a fiber convex structure can be formed at a predetermined part of the pressure-sensitive adhesive layer corresponding to the hole of the release substrate. it can.

  In addition, as a peeling base material which has a hole part, the above-mentioned release liner which has a hole part (especially perforation part) can be used, Especially the hole whose base material for release liners is a plastic-type base material. A release film having a portion (particularly a perforated portion) is suitable. In addition, the thickness of the release substrate having the hole is such that the tip portion of the fiber located outside the surface of the pressure-sensitive adhesive layer is located outside the outer surface of the release substrate having the hole, Any of the non-positioned lengths may be used, but in the same manner as described above, the tip portion of the fiber located outside the surface of the pressure-sensitive adhesive layer passes through the hole of the release substrate having a hole, It is preferable that the thickness is such that it is located on the outer side of the outer surface of the release substrate having a hole.

  As described above, in the method for producing a pressure-sensitive adhesive tape or sheet partially having a fiber convex structure portion at a predetermined portion (particularly the surface) of the pressure-sensitive adhesive layer using a peeling base material having a hole portion, The position where the fiber convex structure part is formed on the pressure-sensitive adhesive layer surface, the size and number of the fiber convex structure part, depending on the position where the hole part of the material is formed, the size and number of the hole part of the release substrate, The recessed part etc. for forming a fiber convex-shaped structure part can be controlled.

  In addition, when the pressure-sensitive adhesive layer is already protected by a release liner that does not have a hole, after peeling off the release liner, a release substrate having a hole is bonded to the surface of the pressure-sensitive adhesive layer, and flocking is performed. Can be applied.

  The release substrate having the hole may be peeled after the fiber convex structure is formed, but is preferably used as it is as a release liner. As described above, in the present invention, the process release liner (release liner used when producing an adhesive tape or sheet) is suitably used as a product release liner (release liner used in an adhesive tape or sheet as a product). Can be used. That is, as a method for producing a pressure-sensitive adhesive tape or sheet having a fiber convex structure portion at a predetermined portion of the pressure-sensitive adhesive layer, for example, a release liner having a hole (particularly a perforated portion) is stacked on the surface of the pressure-sensitive adhesive layer. A method of flocking the pressure-sensitive adhesive layer in a combined state is preferable.

  In addition, when the peeling base material which has a hole part is peeled and removed after forming a fiber convex structure part, the surface from which the fiber of the fiber convex structure part in an adhesive layer protrudes has a recessed part. It can be protected by a liner (particularly, a release liner having a recess at a portion or a portion where the fiber of the fiber convex structure portion in the pressure-sensitive adhesive layer protrudes).

  In the pressure-sensitive adhesive tape or sheet of the present invention, the fiber convex structure is formed in a predetermined part (a predetermined part of the surface, a wall surface of the concave part, etc.) of the pressure-sensitive adhesive layer. After the superposition, temporary attachment can be performed by applying a small load, and after temporary attachment, re-attachment and correction of the attachment position can be performed sufficiently and easily. That is, the pressure-sensitive adhesive tape or sheet of the present invention is excellent in reworkability and adhesion position correction workability when adhering adherends.

  Therefore, the pressure-sensitive adhesive tape or sheet of the present invention can be suitably used as a pressure-sensitive adhesive tape or sheet for applications where it is required to re-apply or modify the attachment position after temporary bonding. It is useful as an adhesive tape or sheet (adhesive tape or sheet for attaching a flooring material) to be used for bonding to the floor. In addition, when using as an adhesive tape or sheet for flooring material sticking, as an adhesive tape or sheet, it has an adhesive layer on both surfaces of a base material, and the predetermined site | part (surface) of the adhesive layer of one side of a base material Or a concave wall surface) has a fiber convex structure portion, and the tip portion of the fiber located outside the surface of the pressure-sensitive adhesive layer in the fiber convex structure portion has at least a releasing function. Double-sided pressure-sensitive adhesive tape or sheet with a base material [that is, a pressure-sensitive adhesive layer (fiber convex structure forming pressure-sensitive adhesive) having a fiber convex structure portion at a predetermined site (surface, concave wall surface, etc.) on one surface of the base material Double-sided type with base material in which a pressure-sensitive adhesive layer that does not have a fiber convex structure portion (fiber convex structure non-forming pressure-sensitive adhesive layer) is formed on the other surface of the base material Adhesive tape or sheet] can be suitably used

The method of bonding the flooring material to the floor using the pressure-sensitive adhesive tape or sheet of the present invention is not particularly limited as long as it is a method of bonding the flooring material to the floor via the pressure-sensitive adhesive tape or sheet. A suitable laminating method is suitable.
[Method of bonding flooring material to the floor]
As an adhesive tape or sheet, for example, it has a fiber convex structure part-forming pressure-sensitive adhesive layer on one side of the base material, and a fiber convex structure part non-forming pressure-sensitive adhesive layer on the other side of the base material. Using a double-sided pressure-sensitive adhesive tape or sheet with a base material, and sticking the adhesive surface on the fiber convex structure non-forming pressure-sensitive adhesive layer side of the pressure-sensitive adhesive tape or sheet to the flooring material, the flooring material is put in place Inserting, sticking the adhesive surface of the fiber convex structure forming adhesive layer to the floor and temporarily adhering them, and then moving the flooring material along the floor to a predetermined place, and then pressing the adhesive tape or sheet The flooring material is firmly bonded to the floor via

  Hereinafter, the present invention will be described in more detail based on examples, but the present invention is not limited to these examples. In the following examples and comparative examples, the fibers can be sprayed in a state of being charged to a positive charge, and a long belt-like sheet is charged to a negative charge from one side to the other side. Using a box (size: length in the flow direction of the line: 2.5 m x width: 1.3 m x height: 1.4 m) provided with a line that can flow in a state, electrostatic flocking is performed. did. Specifically, in a state where the fibers are sprayed from the upper part (one place) in the box and sprayed at an applied voltage of 30 kV, a long belt-like sheet is placed in the box, and the surface on which the hair is planted is the upper surface. Then, electrostatic flocking was performed by introducing the line at a speed of 5 m / min and moving it on the line.

(Example 1)
A polydimethylsiloxane-based silicone release treatment (trade name “KS-778” (manufactured by Shin-Etsu Chemical Co., Ltd.) is applied on both sides of a long belt-like polyester film (trade name “Lumirror # 38” manufactured by Toray Industries, Inc .; thickness 38 μm). A 1% by weight heptane solution was applied and then dried at 120 ° C. for 2 minutes to prepare a release liner (release paper; sometimes referred to as “release liner A1”). The amount of the silicone release treatment agent applied was 0.05 g / m ² .

The release liner A1 has a convex structure and a concave structure (300W test) designed so that the area of one perforated portion is 0.8 mm ² and can be perforated at intervals of 10 mm. A release liner A1 having a pattern shape of a perforated portion as shown in FIG. 5 (may be referred to as “release liner A1 having a perforated portion”) Was made. In the release liner A1 having the perforated part, the average perforated area of each perforated part was 0.8 mm ² and the total perforated area of the perforated part was 0.8% with respect to the total surface area of the release liner. FIG. 5 is a schematic view showing a release liner having a perforated portion. In FIG. 5, 7 is a release liner having a perforated portion, and 7a is a perforated portion.

  On the other hand, on a kraft paper laminated with polyethylene, a 1% by weight heptane solution of a polydimethylsiloxane silicone release agent (trade name “TPR6600” manufactured by GE Toshiba Silicones) was applied to a release liner (“ After preparing a release liner A2 ”, an acrylic pressure-sensitive adhesive (the base polymer is a butyl acrylate-acrylic acid copolymer) is formed on the release treatment surface (release treatment surface) of the release liner A2. Acrylic pressure-sensitive adhesive) was applied so that the thickness after drying was 20 μm to form a pressure-sensitive adhesive layer (sometimes referred to as “pressure-sensitive adhesive layer A1”). After a polyester nonwoven fabric (sometimes referred to as “base material A”) is bonded to the surface of the pressure-sensitive adhesive layer A1, an acrylic pressure-sensitive adhesive (base polymer) is applied to the surface of the base material A (polyester nonwoven fabric). (Acrylic pressure-sensitive adhesive which is a butyl acrylate-acrylic acid copolymer) was applied so that the thickness after drying was 20 μm, to prepare a pressure-sensitive adhesive layer (“pressure-sensitive adhesive layer A2”). Then, release liner A1 which has the said perforated part was bonded together on the surface of this adhesive layer A2. Next, using a polyamide-based fiber (fiber thickness: 3.0 denier, fiber length: 0.3 mm), electrostatic flocking is performed from the surface on the release liner A1 side having a perforated portion, and the perforated portion in the adhesive layer A2 The polyamide-based fiber was planted on the surface of the release liner A1 having a surface located at the perforated part. Further, a polydimethylsiloxane-based silicone release treatment agent passes through the perforated portion of the release liner A1 having a perforated portion, and is applied to the polyamide fiber portion located outside the surface of the release liner A1 having the perforated portion. (After applying a 1% by weight heptane solution of a trade name “KS-837” (manufactured by Shin-Etsu Chemical Co., Ltd.), drying is performed at 120 ° C. for 2 minutes, and a release treatment (peeling property is applied to the tip portion of the polyamide fiber. 6), a double-sided pressure-sensitive adhesive sheet (“both surfaces”) having a fiber raised portion on the surface of one pressure-sensitive adhesive layer and having a tip-end portion of the fiber raised portion as shown in FIG. In other words, the double-sided pressure-sensitive adhesive sheet A has “release liner A2 / adhesive layer A1 / base material A / fiber raised portion on the surface and the fiber raised portion”. The tip of the mold is released It has a layer structure of release liner A1 "having an adhesive layer A2 / perforations being.

In addition, in the mold release treatment for the tip portion of the polyamide fiber, the coating amount of the silicone release treatment agent was an average of 0.05 g / m ² with respect to the planted area.

  FIG. 6 is a schematic cross-sectional view showing a double-sided pressure-sensitive adhesive sheet partially having a fiber raising portion whose tip portion has been release-treated on the surface of one pressure-sensitive adhesive layer. In FIG. 6, 8 is a double-sided pressure-sensitive adhesive sheet, 8a is a release liner, 8b is a pressure-sensitive adhesive layer, 8c is a base material, and 8d has a fiber raised portion whose tip is partly treated on the surface. 8e is a release liner having a perforated portion, 8f is a perforated portion of the release liner 8e, 8g is a fiber raising portion formed on the surface of the pressure-sensitive adhesive layer 8d and the tip portion is subjected to a release treatment, and 8h is This is a tip portion of the fiber raising portion 8g that has been subjected to a mold release process.

(Example 2)
A polydimethylsiloxane-based silicone release treatment (trade name “KS-837” (manufactured by Shin-Etsu Chemical Co., Ltd.) 8 on both sides of a long strip-like polyethylene film (trade name “NSO” manufactured by Okura Kogyo Co., Ltd .; thickness 60 μm). A 0.0 wt% heptane solution was applied and then dried at 120 ° C. for 2 minutes to prepare a release liner (release paper; may be referred to as “release liner B1”). The coating amount of the silicone-based release treatment agent was 0.6 g / m ² .

The release liner B1 has a convex structure and a concave structure similar to those in Example 1 designed so that the area of one perforated portion is 1.0 mm ² and can be perforated at intervals of 5 mm. A perforating process was performed using a perforating machine having a release liner B1 having a perforated portion having the same pattern shape as in Example 1 (sometimes referred to as “release liner B1 having a perforated portion”). In the release liner B1 having the perforated portion, the average perforated area of each perforated portion was 1.0 mm ² , and the total perforated area of the perforated portion was 4% with respect to the total surface area of the release liner.

  On the other hand, on a kraft paper laminated with polyethylene, a 1% by weight heptane solution of a polydimethylsiloxane silicone release agent (trade name “TPR6600” manufactured by GE Toshiba Silicone Co., Ltd.) was applied to a release liner (“ After preparing a release liner B2 ”, a rubber-based pressure-sensitive adhesive (natural rubber and styrene-butadiene rubber is natural rubber / styrene-butadiene rubber = 50) on the release treatment surface of the release liner B2. The rubber-based pressure-sensitive adhesive compounded at a ratio of / 50 (weight ratio) is applied so that the thickness after drying is 20 μm, and may be referred to as a pressure-sensitive adhesive layer (“pressure-sensitive adhesive layer B1”). ) Was formed. A polyester-based non-woven fabric (sometimes referred to as “base material B”) is bonded to the surface of the pressure-sensitive adhesive layer B1, and then a rubber-based pressure-sensitive adhesive (natural rubber) is applied to the surface of the base material B (polyester-based non-woven fabric). And rubber-adhesive in which styrene-butadiene rubber is blended in a ratio of natural rubber / styrene-butadiene rubber = 50/50 (weight ratio), so that the thickness after drying is 20 μm. Thus, a pressure-sensitive adhesive layer (“pressure-sensitive adhesive layer B2”) was produced. Then, release liner B1 which has the said perforated part was bonded together on the surface of this adhesive layer B2. Next, using a cotton fiber (fiber thickness: 3.0 denier, fiber length: 1.0 mm), electrostatic flocking is performed from the surface on the release liner B1 side having the perforated portion, and the perforated portion in the adhesive layer B2 is formed. The cotton fiber was planted on the surface of the release liner B1 having the perforated portion. Further, a polydimethylsiloxane-based silicone release treatment agent (on a cotton fiber portion located outside the surface of the release liner B1 having a perforated portion through the perforated portion of the release liner B1 having a perforated portion ( After applying a 1% by weight heptane solution of the trade name “KS-837” (manufactured by Shin-Etsu Chemical Co., Ltd.), drying is performed at 120 ° C. for 2 minutes, and a release treatment (peeling treatment) is applied to the tip of the cotton fiber. ), And a double-sided pressure-sensitive adhesive sheet (“double-sided pressure-sensitive adhesive sheet”) having a fiber raised portion on the surface of one pressure-sensitive adhesive layer and a release portion of the tip portion of the fiber raised portion as shown in FIG. In other words, the double-sided pressure-sensitive adhesive sheet B has “release liner B2 / adhesive layer B1 / substrate B / surface having a fiber raised portion and the tip of the fiber raised portion”. Adhesive layer B where part has been released / Has a layer structure of release liner B1 "having a perforated portion.

  The photograph regarding the double-sided adhesive sheet B is shown in FIGS. FIG. 7 is a view showing a photograph relating to the shape of the fiber raised portion formed on the double-sided pressure-sensitive adhesive sheet B in Example 2, and has a fiber raised portion on the surface, and the tip portion of the fiber raised portion is a mold release treatment. It is the figure seen from the upper surface of adhesive layer B2 made. FIG. 8 is a view showing a photograph relating to the shape of the fiber raised portion formed in the double-sided pressure-sensitive adhesive sheet B in Example 2, and is an enlarged side view of the main part showing the fiber raised portion according to FIG. 7. The photographs shown in FIGS. 7 to 8 are photographs taken using a trade name “VH-6200” (manufactured by KEYENCE) as a digital microscope under a magnification ratio of 10 to 175 times.

In the mold release treatment for the tip portion of the cotton fiber, the coating amount of the silicone-based release treatment agent was an average of 0.05 g / m ² with respect to the planted area.

(Example 3)
A polydimethylsiloxane-based silicone release treatment (trade name “KS-778” (manufactured by Shin-Etsu Chemical Co., Ltd.) is applied on both sides of a long belt-like polyester film (trade name “Lumirror # 38” manufactured by Toray Industries, Inc .; thickness 38 μm). A 1% by weight heptane solution was applied and then dried at 120 ° C. for 2 minutes to prepare a release liner (release paper; sometimes referred to as “release liner C1”). The coating amount of the silicone-based release treatment agent was 0.1 g / m ² .

The release liner C1 has a convex structure and a concave structure similar to those in Example 1 designed so that the area of one perforated portion is 1.5 mm ² and can be perforated at intervals of 20 mm. A perforating process was performed using a perforating machine having a release liner C1 having a perforated portion having a pattern shape similar to that of Example 1 (sometimes referred to as “release liner C1 having a perforated portion”). In the release liner C1 having the perforated part, the average perforated area of each perforated part was 1.5 mm ² , and the total perforated area of the perforated part was 0.4% with respect to the total surface area of the release liner.

  On the other hand, a 2% by weight heptane solution of a polydimethylsiloxane-based silicone release treating agent (trade name “TPR6600” manufactured by GE Toshiba Silicone Co., Ltd.) is applied onto a kraft paper laminated with polyethylene, and a release liner (“ After preparing a release liner C2), an acrylic pressure-sensitive adhesive (an acrylic pressure-sensitive adhesive in which the base polymer is a butyl acrylate-acrylic acid copolymer) is formed on the release treatment surface of the release liner C2. Was coated so that the thickness after drying was 20 μm to form an adhesive layer (sometimes referred to as “adhesive layer C1”). After bonding a polyester-based non-woven fabric (sometimes referred to as “base material C”) to the surface of the pressure-sensitive adhesive layer C1, an acrylic pressure-sensitive adhesive (base polymer) is applied to the surface of the base material C (polyester-based non-woven fabric). (Acrylic pressure-sensitive adhesive which is a butyl acrylate-acrylic acid copolymer) was applied so that the thickness after drying was 20 μm, to prepare a pressure-sensitive adhesive layer (“pressure-sensitive adhesive layer C2”). Thereafter, a release liner C1 having the perforated portion was bonded to the surface of the pressure-sensitive adhesive layer C2. Next, using a polyamide fiber (fiber thickness: 3.0 denier, fiber length: 1.0 mm), electrostatic flocking is applied from the surface on the release liner C1 side having a perforated portion, and the perforated portion in the pressure-sensitive adhesive layer C2 The polyamide-based fiber was planted on the surface of the release liner C1 having the surface of the release liner C1. Further, a polydimethylsiloxane-based silicone release treatment agent passes through the perforated portion of the release liner C1 having a perforated portion and is applied to a portion of the polyamide fiber located outside the surface of the release liner C1 having the perforated portion. (After applying a 1% by weight heptane solution of a trade name “KS-837” (manufactured by Shin-Etsu Chemical Co., Ltd.), drying is performed at 120 ° C. for 2 minutes, and a release treatment (peeling property is applied to the tip of the polyamide fiber 6), a double-sided pressure-sensitive adhesive sheet (“both surfaces”) having a fiber raised portion on the surface of one pressure-sensitive adhesive layer and having a tip-end portion of the fiber raised portion as shown in FIG. In other words, the double-sided PSA sheet C has “release liner C2 / adhesive layer C1 / base material C / fiber raised portion on the surface and the fiber raised portion”. The tip of the mold is released It has a layer structure of release liner C1 "having an adhesive layer C2 / perforations being.

In addition, in the mold release treatment for the tip portion of the polyamide fiber, the coating amount of the silicone release treatment agent was an average of 0.05 g / m ² with respect to the planted area.

Example 4
A polydimethylsiloxane-based silicone release treatment (trade name “KS-778” (manufactured by Shin-Etsu Chemical Co., Ltd.) is applied on both sides of a long belt-like polyester film (trade name “Lumirror # 38” manufactured by Toray Industries, Inc .; thickness 38 μm). A 1% by weight heptane solution was applied and then dried at 120 ° C. for 2 minutes to produce a release liner (release paper; sometimes referred to as “release liner D1”). The coating amount of the silicone-based release treatment agent was 0.1 g / m ² .

  On one release-treated surface of the release liner D1, an acrylic pressure-sensitive adhesive (an acrylic pressure-sensitive adhesive whose base polymer is a butyl acrylate-acrylic acid copolymer) is applied so that the thickness after drying is 30 μm. To form a pressure-sensitive adhesive layer (sometimes referred to as “pressure-sensitive adhesive layer D”), and on the surface of the pressure-sensitive adhesive layer D, a release liner (release paper; The adhesive sheet (may be referred to as “adhesive sheet D”) is superposed so that one of the release treatment surfaces is in contact with the surface of the adhesive layer D. Got. That is, the pressure-sensitive adhesive sheet D has a layer configuration of “release liner D1 / adhesive layer D / release liner D2”.

  Furthermore, the pressure-sensitive adhesive sheet D is cut by half-cutting using a die having a 1 mmφ (diameter of 1 mm) shape at intervals of 10 mm (the punching process is performed on the release liner D2 and the pressure-sensitive adhesive layer D). To obtain a pressure-sensitive adhesive sheet D having a layer structure of “release liner D1 / pressure-sensitive adhesive layer D partially formed with a perforated portion / release liner D2 partially formed with a perforated portion”. .

  Electrostatic flocking is performed from the release liner D2 side where the perforated portion is formed using polyamide fibers (fiber thickness: 3.0 denier, fiber length: 0.3 mm) on the punched pressure-sensitive adhesive sheet D. The polyamide fiber was planted on the wall surface of the perforated part of the pressure-sensitive adhesive layer D. Furthermore, a polydimethylsiloxane-based silicone system is formed on the portion of the polyamide fiber located outside the surface of the release liner D2 having the perforated portion through the perforated portion of the release liner D2 in which the perforated portion is formed. After applying a 1% by weight heptane solution of a release treatment agent (trade name “KS-837” (manufactured by Shin-Etsu Chemical Co., Ltd.)), drying is performed at 120 ° C. for 2 minutes to release the polyamide fiber at the tip portion. (Peeling treatment) is performed, and as shown in FIG. 2 (b), there is a fiber raised portion on the wall surface of the perforated portion partially formed in one adhesive layer, and the fiber raised portion A double-sided pressure-sensitive adhesive sheet (which may be referred to as “double-sided pressure-sensitive adhesive sheet D”) having a release portion at the front end portion thereof was prepared, that is, the double-sided pressure-sensitive adhesive sheet D was “release liner D1 / partially formed perforations”. Raised fiber on the wall of the part And the tip portion of the fiber napping section having a has a layer structure of release liner D2 "having releasability treated adhesive layer D / perforations are.

In addition, in the mold release treatment for the tip portion of the polyamide fiber, the coating amount of the silicone release treatment agent was an average of 0.05 g / m ² with respect to the planted area.

(Example 5)
A polydimethylsiloxane-based silicone release treatment (trade name “KS-837” (manufactured by Shin-Etsu Chemical Co., Ltd.) 8 on both sides of a long strip-like polyethylene film (trade name “NSO” manufactured by Okura Kogyo Co., Ltd .; thickness 60 μm). A 0.0 wt% heptane solution was applied and then dried at 120 ° C. for 2 minutes to produce a release liner (release paper; sometimes referred to as “release liner E1”). The coating amount of the silicone-based release treatment agent was 0.6 g / m ² .

  On one release-treated surface of the release liner E1, a rubber-based adhesive (natural rubber and styrene-butadiene rubber is blended in a ratio of natural rubber / styrene-butadiene rubber = 50/50 (weight ratio). (Rubber adhesive) is applied so that the thickness after drying is 30 μm to form an adhesive layer (sometimes referred to as “adhesive layer E”). A release liner having the same configuration as the release liner E1 (release paper; sometimes referred to as “release liner E2”) is disposed on the surface so that one of the release treatment surfaces is in contact with the surface of the pressure-sensitive adhesive layer E. By overlapping, a pressure-sensitive adhesive sheet (sometimes referred to as “pressure-sensitive adhesive sheet E”) was obtained. That is, the pressure-sensitive adhesive sheet E has a layer configuration of “release liner E1 / pressure-sensitive adhesive layer E / release liner E2”.

  Further, the pressure-sensitive adhesive sheet E was cut by half-cutting using a mold having punches with a shape of 1.5 mmφ (diameter: 1.5 mm) at intervals of 5 mm (release liner E2, adhesive layer E, and In the same manner as in Example 4, the layer configuration of “release liner E1 / adhesive layer E with partially perforated portions / release liner E2 with partially perforated portions” is the same as in Example 4. A pressure-sensitive adhesive sheet E having

  Electrostatic flocking processing is performed from the release liner E2 side where the perforated portion is formed using cotton fibers (fiber thickness: 3.0 denier, fiber length: 1.0 mm) on the punched pressure-sensitive adhesive sheet E. The cotton fibers were planted on the wall surface of the perforated part of the pressure-sensitive adhesive layer E. Further, after passing through the perforated portion of the release liner E2 in which the perforated portion is formed, the polydimethylsiloxane-based silicone-based release is applied to the cotton fiber portion positioned outside the surface of the release liner E2 having the perforated portion. After applying a 1 wt% heptane solution of a treating agent (trade name “KS-837” (manufactured by Shin-Etsu Chemical Co., Ltd.), drying is performed at 120 ° C. for 2 minutes, and a release treatment (peeling) is applied to the tip of the cotton fiber. 2 (b), and has a fiber raised portion on the wall surface of the perforated part partially formed in one pressure-sensitive adhesive layer as shown in FIG. 2 (b), and the tip portion of the fiber raised portion A double-sided pressure-sensitive adhesive sheet (which may be referred to as “double-sided pressure-sensitive adhesive sheet E”) was produced, that is, the double-sided pressure-sensitive adhesive sheet E was composed of “peeling liner E1 / partially formed perforated part”. A fiber raising portion on the wall surface and the fiber raising portion; The tip portion of the part has a layer structure of release liner E2 "having a release treated adhesive layer E / perforations are.

In the mold release treatment for the tip portion of the cotton fiber, the coating amount of the silicone-based release treatment agent was an average of 0.05 g / m ² with respect to the planted area.

(Example 6)
A polydimethylsiloxane-based silicone release treatment (trade name “KS-778” (manufactured by Shin-Etsu Chemical Co., Ltd.) is applied on both sides of a long belt-like polyester film (trade name “Lumirror # 38” manufactured by Toray Industries, Inc .; thickness 38 μm). A 1% by weight heptane solution was applied and then dried at 120 ° C. for 2 minutes to prepare a release liner (release paper; sometimes referred to as “release liner F1”). The coating amount of the silicone-based release treatment agent was 0.1 g / m ² .

  On one release-treated surface of the release liner F1, an acrylic pressure-sensitive adhesive (an acrylic pressure-sensitive adhesive in which the base polymer is a butyl acrylate-acrylic acid copolymer) is applied so that the thickness after drying becomes 30 μm. To form a pressure-sensitive adhesive layer (sometimes referred to as “pressure-sensitive adhesive layer F”), and on the surface of the pressure-sensitive adhesive layer F, a release liner (release paper; similar to the release liner F1). The adhesive sheet (may be referred to as “adhesive sheet F”) is overlapped so that one of the release treatment surfaces is in contact with the surface of the adhesive layer F. Got. That is, the adhesive sheet F has a layer configuration of “release liner F1 / adhesive layer F / release liner F2”.

  Further, the pressure-sensitive adhesive sheet F is cut by half-cutting using a die having a 1 mmφ (diameter is 1 mm) shape at intervals of 20 mm (a punching process is performed on the release liner F2 and the pressure-sensitive adhesive layer F). In the same manner as in Example 4, it has a layer structure of “release liner F1 / adhesive layer F with partially perforated portions / release liner F2 with partially perforated portions”. An adhesive sheet F was obtained.

  Electrostatic flocking is performed from the release liner F2 side where the perforated portion is formed using polyamide fibers (fiber thickness: 3.0 denier, fiber length: 1.0 mm) on the punched adhesive sheet F. The polyamide fiber was planted on the wall surface of the perforated part of the pressure-sensitive adhesive layer F. Furthermore, a polydimethylsiloxane-based silicone system is formed on the portion of the polyamide fiber located outside the surface of the release liner F2 having the perforated portion through the perforated portion of the release liner F2 in which the perforated portion is formed. After applying a 1% by weight heptane solution of a release treatment agent (trade name “KS-837” (manufactured by Shin-Etsu Chemical Co., Ltd.)), drying is performed at 120 ° C. for 2 minutes to release the polyamide fiber at the tip portion. (Peeling treatment) is performed, and as shown in FIG. 2 (b), there is a fiber raised portion on the wall surface of the perforated portion partially formed in one adhesive layer, and the fiber raised portion A double-sided pressure-sensitive adhesive sheet (which may be referred to as “double-sided pressure-sensitive adhesive sheet F”) whose tip portion was subjected to a release treatment was produced. Raised fiber on the wall surface And the tip portion of the fiber napping section having a has a layer structure of release liner F2 "having releasability treated adhesive layer F / perforations are.

In addition, in the mold release treatment for the tip portion of the polyamide fiber, the coating amount of the silicone release treatment agent was an average of 0.05 g / m ² with respect to the planted area.

(Example 7)
A polydimethylsiloxane-based silicone release treatment (trade name “KS-778” (manufactured by Shin-Etsu Chemical Co., Ltd.) is applied on both sides of a long belt-like polyester film (trade name “Lumirror # 38” manufactured by Toray Industries, Inc .; thickness 38 μm). A 0.5 wt% heptane solution was applied and then dried at 120 ° C. for 2 minutes to prepare a release liner (release paper; sometimes referred to as “release liner G1”). In G1, the coating amount of the silicone-based release treatment agent was 0.05 g / m ² .

The release liner G1 is provided with a convex structure and a concave structure similar to those of Example 1 designed so that the area of one perforated portion is 0.8 mm ² and can be perforated at intervals of 10 mm. A perforating process was performed using a perforating machine having a release liner G1 having a perforated portion having the same pattern shape as in Example 1 (sometimes referred to as “release liner G1 having a perforated portion”). In the release liner G1 having the perforated part, the average perforated area of each perforated part was 0.8 mm ² , and the total perforated area of the perforated part was 0.8% with respect to the total surface area of the release liner.

  On the other hand, a 0.5% by weight heptane solution of a polydimethylsiloxane-based silicone release treatment agent (trade name “TPR6600” manufactured by GE Toshiba Silicone Co., Ltd.) is coated on a kraft paper laminated with polyethylene to release a release liner. (May be referred to as “release liner G2”), and then an acrylic adhesive (an acrylic adhesive whose base polymer is a butyl acrylate-acrylic acid copolymer) is formed on the release treatment surface of the release liner G2. The adhesive was applied so that the thickness after drying was 80 μm to form an adhesive layer (sometimes referred to as “adhesive layer G1”). After bonding a polyester nonwoven fabric (sometimes referred to as “base material G”) to the surface of the pressure-sensitive adhesive layer G1, an acrylic pressure-sensitive adhesive (base polymer) is applied to the surface of the base material G (polyester nonwoven fabric). (Acrylic pressure-sensitive adhesive which is a butyl acrylate-acrylic acid copolymer) was applied so that the thickness after drying was 80 μm, to prepare a pressure-sensitive adhesive layer (“pressure-sensitive adhesive layer G2”). Thereafter, a release liner G1 having the perforated part was bonded to the surface of the pressure-sensitive adhesive layer G2.

  Further, a polyamide fiber (fiber thickness 1.5 denier, fiber length 0.3 mm) was added to a polydimethylsiloxane-based silicone release agent (trade name “KS-778” (manufactured by Shin-Etsu Chemical Co., Ltd.)). After dipping in a 5% by weight heptane solution, drying was performed at 120 ° C. for 2 minutes, and the entire polyamide fiber was subjected to a release treatment (peeling treatment), and the entire fiber was subjected to a release treatment. In the release treatment for the entire polyamide fiber, the thickness of the release treatment with the silicone release treatment agent was 0.05 μm.

  Next, using the polyamide-based fiber that has been subjected to the above-described mold release treatment, electrostatic flocking is performed from the surface on the side of the release liner G1 having the perforated portion, and the release liner having the perforated portion in the pressure-sensitive adhesive layer G2. A fiber raised portion is formed on the surface of one pressure-sensitive adhesive layer as shown in FIG. 6 by flocking the polyamide-based fiber having the release treatment applied to the entire surface on the surface located in the perforated portion of G1. And a double-sided pressure-sensitive adhesive sheet (sometimes referred to as a “double-sided pressure-sensitive adhesive sheet G”) in which the entire fiber of the fiber raised portion was subjected to a release treatment. In other words, the double-sided pressure-sensitive adhesive sheet G has “peeling liner G2 / adhesive layer G1 / base G / having a fiber raised portion on the surface, and the entire fiber of the fiber raised portion is subjected to a release treatment. / A layer structure of a release liner G1 "having a perforated portion.

(Example 8)
A polydimethylsiloxane-based silicone release treatment (trade name “KS-837” (manufactured by Shin-Etsu Chemical Co., Ltd.) 8 on both sides of a long strip-like polyethylene film (trade name “NSO” manufactured by Okura Kogyo Co., Ltd .; thickness 60 μm). A 0.0 wt% heptane solution was applied and dried at 120 ° C. for 2 minutes to prepare a release liner (release paper; sometimes referred to as “release liner H1”). The coating amount of the silicone-based release treatment agent was 0.6 g / m ² .

The release liner H1 has a convex structure and a concave structure similar to those in Example 1 designed so that the area of one perforated portion is 1.0 mm ² and can be perforated at intervals of 5 mm. A perforating process was performed using a perforating machine having a release liner H1 having a perforated portion having the same pattern shape as in Example 1 (sometimes referred to as “release liner H1 having a perforated portion”). In the release liner H1 having the perforated part, the average perforated area of each perforated part was 1.0 mm ² , and the total perforated area of the perforated part was 4% with respect to the total surface area of the release liner.

  On the other hand, a 0.5% by weight heptane solution of a polydimethylsiloxane-based silicone release treatment agent (trade name “TPR6600” manufactured by GE Toshiba Silicone Co., Ltd.) is coated on a kraft paper laminated with polyethylene to release a release liner. (Sometimes referred to as “release liner H2”), a rubber-based adhesive (natural rubber and styrene-butadiene rubber are natural rubber / styrene-butadiene rubber is formed on the release-treated surface of the release liner H2. = Rubber pressure-sensitive adhesive compounded at a ratio of 50/50 (weight ratio) is applied so that the thickness after drying is 80 μm, and the pressure-sensitive adhesive layer (referred to as “pressure-sensitive adhesive layer H1”) Formed). After bonding a polyester-based non-woven fabric (sometimes referred to as “base material H”) to the surface of this pressure-sensitive adhesive layer H1, a rubber-based pressure-sensitive adhesive (natural rubber and A styrene-butadiene rubber and a rubber-based pressure-sensitive adhesive in which a ratio of natural rubber / styrene-butadiene rubber = 50/50 (weight ratio) is applied so that the thickness after drying is 80 μm. A pressure-sensitive adhesive layer (“pressure-sensitive adhesive layer H2”) was prepared. Thereafter, a release liner H1 having the perforated part was bonded to the surface of the pressure-sensitive adhesive layer H2.

  Further, cotton fiber (fiber thickness 1.5 denier, fiber length 1.0 mm) was added to a polydimethylsiloxane silicone release agent (trade name “KS-837” (manufactured by Shin-Etsu Chemical Co., Ltd.)). After dipping in a weight% heptane solution, drying is performed at 120 ° C. for 2 minutes to perform a release treatment (peeling treatment) on the entire cotton fiber, and the release treatment is applied to the entire fiber. In addition, in the mold release treatment for the entire fibers of the cotton fiber, the thickness of the mold release treatment with the silicone-based release treatment agent was 0.05 μm.

  Next, electrostatic flocking is performed from the surface of the release liner H1 side having the perforated portion using the cotton fiber subjected to the above-described release treatment on the entire fiber, and the release liner H1 having the perforated portion in the pressure-sensitive adhesive layer H2. A cotton fiber having the release treatment applied to the entire fiber is planted on the surface located at the perforated portion of the fiber, and a fiber raised portion is provided on the surface of one adhesive layer as shown in FIG. And the double-sided adhesive sheet (it may be called "double-sided adhesive sheet H") by which the whole fiber of this fiber raising part was mold-release-processed was produced. In other words, the double-sided pressure-sensitive adhesive sheet H is “adhesive layer H2 having a release liner H2 / adhesive layer H1 / base material H / fiber raising portion on the surface and the entire fibers of the fiber raising portion being subjected to release treatment. / A layer structure of a release liner H1 "having a perforated portion.

Example 9
A polydimethylsiloxane-based silicone release treatment (trade name “KS-778” (manufactured by Shin-Etsu Chemical Co., Ltd.) is applied on both sides of a long belt-like polyester film (trade name “Lumirror # 38” manufactured by Toray Industries, Inc .; thickness 38 μm). A 1.0 wt% heptane solution was applied and then dried at 120 ° C. for 2 minutes to prepare a release liner (release paper; sometimes referred to as “release liner I1”). In I1, the coating amount of the silicone-based release treatment agent was 0.1 g / m ² .

The release liner I1 has a convex structure and a concave structure similar to those in Example 1 designed so that the area of one perforated portion is 1.5 mm ² and can be perforated at intervals of 20 mm. A perforating process was performed using a perforating machine having a release liner I1 having a perforated portion having the same pattern shape as in Example 1 (sometimes referred to as “release liner I1 having a perforated portion”). In the release liner I1 having the perforated part, the average perforated area of each perforated part was 1.5 mm ² , and the total perforated area of the perforated part was 0.4% with respect to the total surface area of the release liner.

  On the other hand, a 2.0% by weight heptane solution of a polydimethylsiloxane-based silicone release agent (trade name “TPR6600” manufactured by GE Toshiba Silicones) is applied onto a kraft paper laminated with polyethylene to release a release liner. (It may be referred to as “release liner I2”), and then an acrylic adhesive (an acrylic adhesive whose base polymer is a butyl acrylate-acrylic acid copolymer) is formed on the release treatment surface of the release liner I2. The adhesive was applied so that the thickness after drying was 80 μm to form an adhesive layer (sometimes referred to as “adhesive layer I1”). After a polyester nonwoven fabric (sometimes referred to as “base material I”) is bonded to the surface of this pressure-sensitive adhesive layer I1, an acrylic pressure-sensitive adhesive (base polymer) is applied to the surface of the base material I (polyester nonwoven fabric). (Acrylic pressure-sensitive adhesive which is a butyl acrylate-acrylic acid copolymer) was applied so that the thickness after drying was 80 μm, to prepare a pressure-sensitive adhesive layer (“pressure-sensitive adhesive layer I2”). Thereafter, a release liner I1 having the perforated portion was bonded to the surface of the pressure-sensitive adhesive layer I2.

  In addition, polyamide fiber (fiber thickness 1.5 denier, fiber length 1.0 mm) was added to a polydimethylsiloxane silicone release agent (trade name “KS-778” (manufactured by Shin-Etsu Chemical Co., Ltd.)). After dipping in a 5% by weight heptane solution, drying was performed at 120 ° C. for 2 minutes, and the entire polyamide fiber was subjected to a release treatment (peeling treatment), and the entire fiber was subjected to a release treatment. In the release treatment for the entire polyamide fiber, the thickness of the release treatment with the silicone release treatment agent was 0.05 μm.

  Next, using the polyamide-based fiber that has been subjected to the above-described mold release treatment, electrostatic flocking is performed from the surface of the release liner I1 having a perforated portion, and the release liner having the perforated portion in the pressure-sensitive adhesive layer I2 A fiber raised portion is formed on the surface of one pressure-sensitive adhesive layer as shown in FIG. 6 by flocking the surface of the I1 perforated portion with a polyamide-based fiber having the release treatment applied to the entire fiber. And a double-sided pressure-sensitive adhesive sheet (sometimes referred to as “double-sided pressure-sensitive adhesive sheet I”) in which the entire fibers of the fiber raised portion were subjected to a release treatment. In other words, the double-sided pressure-sensitive adhesive sheet I is “a pressure-sensitive adhesive layer I2 having a release liner I2 / adhesive layer I1 / base material I / a fiber raised portion on the surface and the entire fiber of the fiber raised portion is subjected to a release treatment. / A layer structure of a release liner I1 "having a perforated portion.

(Example 10)
A polydimethylsiloxane-based silicone release treatment (trade name “KS-778” (manufactured by Shin-Etsu Chemical Co., Ltd.) is applied on both sides of a long belt-like polyester film (trade name “Lumirror # 38” manufactured by Toray Industries, Inc .; thickness 38 μm). A 0.5 wt% heptane solution was applied and then dried at 120 ° C. for 2 minutes to prepare a release liner (release paper; sometimes referred to as “release liner J1”). In J1, the coating amount of the silicone release treatment agent was 0.05 g / m ² .

The release liner J1 has a convex structure and a concave structure similar to those in Example 1 designed so that the area of one perforated portion is 1.5 mm ² and can be perforated at intervals of 20 mm. A perforating process was performed using a perforating machine having a release liner J1 having a perforated portion having the same pattern shape as in Example 1 (sometimes referred to as “release liner J1 having a perforated portion”). In the release liner J1 having the perforated part, the average perforated area of each perforated part was 1.5 mm ² , and the total perforated area of the perforated part was 0.4% with respect to the total surface area of the release liner.

  On the other hand, a 0.5% by weight heptane solution of a polydimethylsiloxane-based silicone release treatment agent (trade name “TPR6600” manufactured by GE Toshiba Silicone Co., Ltd.) is applied onto a kraft paper laminated with polyethylene to release a release liner. (It may be referred to as “release liner J2”), and then an acrylic adhesive (an acrylic adhesive whose base polymer is a butyl acrylate-acrylic acid copolymer) is formed on the release treatment surface of the release liner J2. The pressure-sensitive adhesive layer was coated so that the thickness after drying was 80 μm to form a pressure-sensitive adhesive layer (sometimes referred to as “pressure-sensitive adhesive layer J1”). After bonding a polyester nonwoven fabric (sometimes referred to as “base material J”) to the surface of this pressure-sensitive adhesive layer J1, an acrylic pressure-sensitive adhesive (base polymer) is applied to the surface of the base material J (polyester nonwoven fabric). (Acrylic pressure-sensitive adhesive which is a butyl acrylate-acrylic acid copolymer) was applied so that the thickness after drying was 80 μm, to prepare a pressure-sensitive adhesive layer (“pressure-sensitive adhesive layer J2”). Thereafter, a release liner J1 having the perforated part was bonded to the surface of the pressure-sensitive adhesive layer J2.

  Next, electrostatic flocking is applied from the surface on the release liner J1 side having a perforated portion using polyethylene fibers (fiber thickness: 3.0 denier, fiber length: 1.5 mm), and the perforated portion in the pressure-sensitive adhesive layer J2 The above-mentioned polyethylene-based fiber is planted on the surface of the release liner J1 having a perforated part, and the fiber has a fiber raised part on the surface of one pressure-sensitive adhesive layer as shown in FIG. A double-sided pressure-sensitive adhesive sheet (sometimes referred to as “double-sided pressure-sensitive adhesive sheet J”) in which the fibers of the raised portions themselves have a release function was produced. That is, the double-sided pressure-sensitive adhesive sheet J is “a pressure-sensitive adhesive having a release liner J2 / adhesive layer J1 / base material J / a fiber raised portion on the surface and the fiber itself of the fiber raised portion has a releasing function. It has a layer configuration of “layer J2 / release liner J1 having perforated portions”.

The implanted polyethylene fibers are made of polyethylene having a solubility parameter (SP value) of 17.6 [MPa] ^1/2 .

(Comparative Example 1)
A double-sided pressure-sensitive adhesive sheet (sometimes referred to as “double-sided pressure-sensitive adhesive sheet K”) was prepared in the same manner as in Example 1 except that the perforation to the release liner and the flocking process to the pressure-sensitive adhesive layer were not performed. That is, the double-sided pressure-sensitive adhesive sheet K is “release liner A2 / adhesive layer A1 / base material A / adhesive layer A2 (having no fiber raised portion on the surface) / release liner A1 (having a perforated portion). Not)).

(Comparative Example 2)
A polydimethylsiloxane-based silicone release treatment agent is applied to a portion of the polyamide fiber located outside the surface of the release liner A1 having the perforated portion through the perforated portion of the release liner A1 having the perforated portion. A double-sided pressure-sensitive adhesive sheet (sometimes referred to as “double-sided pressure-sensitive adhesive sheet L”) was prepared in the same manner as in Example 1 except that the release treatment was not performed. That is, the double-sided pressure-sensitive adhesive sheet L has a layer configuration of “release liner A2 / adhesive layer A1 / base material A / pressure-sensitive adhesive layer A2 / having a fiber raised portion on the surface / release liner A1 having a perforated portion”. Yes. Further, the tip of the fiber raised portion formed in the pressure-sensitive adhesive layer A2 is located outside the surface of the release liner A1 having the perforated part through the perforated part of the release liner A1 having the perforated part, The tip portion is not subjected to mold release treatment.

(Comparative Example 3)
A polydimethylsiloxane-based silicone release treatment agent is applied to the polyamide fiber portion located outside the surface of the release liner D2 having the perforated portion through the perforated portion of the release liner D2 having the perforated portion. A double-sided pressure-sensitive adhesive sheet (sometimes referred to as “double-sided pressure-sensitive adhesive sheet M”) was prepared in the same manner as in Example 4 except that the release treatment was not performed. That is, the double-sided pressure-sensitive adhesive sheet M has a layer configuration of “release liner D1 / adhesive layer D having a fiber raised portion on the wall surface of a partially formed perforated portion / release liner D2 having a perforated portion”. Yes. The tip of the fiber raised portion formed in the pressure-sensitive adhesive layer D is located outside the surface of the release liner D2 having the perforated portion through the perforated portion of the release liner D2 having the perforated portion, The tip portion is not subjected to mold release treatment.

(Comparative Example 4)
As fibers to be planted, polystyrene fibers (fiber thickness: 3.0 denier, fiber length: 1.5 mm) were used instead of polyethylene fibers (fiber thickness: 3.0 denier, fiber length: 1.5 mm). A double-sided pressure-sensitive adhesive sheet (sometimes referred to as “double-sided pressure-sensitive adhesive sheet N”) was prepared in the same manner as in Example 10 except that. That is, the double-sided pressure-sensitive adhesive sheet N is “release liner J2 / adhesive layer J1 / base material J / having a fiber raised portion on the surface and fibers of the fiber raised portion are polystyrene fibers (having a release function). (Not) adhesive layer J2 / release liner J1 having a perforated portion ”.

The implanted polystyrene fibers are made of polystyrene having a solubility parameter (SP value) of 21.7 [MPa] ^1/2 .

(Evaluation)
From the double-sided pressure-sensitive adhesive sheets (double-sided pressure-sensitive adhesive sheet A to double-sided pressure-sensitive adhesive sheet N) obtained by Examples and Comparative Examples, release liners A1 to C1 (Examples 1 to 3) having perforated portions and release liner D2 having perforated portions. F2 (Examples 4 to 6), release liners G1 to J1 having a perforated part (Examples 7 to 10), release liner A1 (Comparative Example 1), release liner A1 having a perforated part (Comparative Example 2), perforated part After peeling off the release liner D2 (Comparative Example 3) having a perforated portion or the release liner J1 (Comparative Example 4) having a perforated portion, 25 g / 22.5 cm ² from the other release liner side to the acrylic plate. After temporary bonding with a load of 6mm, move 6mm from the position where the double-sided PSA sheet was pasted, and then press it firmly. Depending on whether this movement is easy or not, the pasting position is corrected. It was evaluated.

Moreover, after pasting, it was allowed to stand at room temperature (23 ° C.) for 24 hours, and then was attached to an acrylic plate using a Tensilon tensile tester (180 ° peel adhesive strength; tensile speed 300 mm / min, 23 ° C. × 55). % RH) was measured, and the adhesive force due to the pressure-sensitive adhesive layer having the fiber raised portion on the surface was evaluated as the adhesive strength recovery rate (%) by the ratio to the adhesive force of the double-sided pressure-sensitive adhesive sheet of Comparative Example 1. The adhesive strength recovery rate (%) is represented by the following formula.
Adhesive strength recovery rate (%) = [(Adhesive strength of double-sided PSA sheet of each Example or Comparative Example) / (Adhesive strength of double-sided PSA sheet of Comparative Example 1)] × 100

  Furthermore, from the double-sided pressure-sensitive adhesive sheets (double-sided pressure-sensitive adhesive sheet A to double-sided pressure-sensitive adhesive sheet N) obtained in Examples and Comparative Examples, in Examples 1 to 3, release liners (release liners A2 to C2) that do not have a perforated portion. In Examples 4 to 6, release liners having no perforated part (release liners D1 to F1), in Examples 7 to 10 release liners having no perforated part (release liners G2 to J2), Comparative Example 1 Is a release liner A2, a release liner A2 that does not have a perforated portion in Comparative Example 2, a release liner D1 that does not have a perforated portion in Comparative Example 3, and a release liner that does not have a perforated portion in Comparative Example 4 (release) Each of the liners J2) is peeled off, and the other surface [the surface on the side of the release liner (release liners A1 to C1 having a perforated part) in Examples 1-3], Examples 4 to The surface on the side of the release liner having the perforated part (release liners D2 to F2 having the perforated part), the surface on the side of the release liner having the perforated part (release liners G1 to J1 having the perforated part) in Examples 7 to 10, comparison In Example 1, the surface on the release liner A1 side, in Comparative Example 2, the surface on the release liner A1 side having a perforated portion, in Comparative Example 3, the surface on the release liner D2 side having a perforated portion, and in Comparative Example 4, the surface on the release liner J1 side A self-back surface was wound into a roll shape to produce a pressure-sensitive adhesive tape (rolled body) wound in a roll shape. That is, the surface of the pressure-sensitive adhesive layer exposed by peeling of the release liner [the surface of the pressure-sensitive adhesive layers A1 to C1 in Examples 1 to 3, the side of the release liner D1 to F1 in the pressure-sensitive adhesive layers D to F in Examples 4 to 6 Surface (surface on the side where the fiber tip of the fiber raising portion is not located outside the surface, the surface of the adhesive layer G1 to J1 in Examples 7 to 10, the surface of the adhesive layer A1 in Comparative Example 1, comparison In Example 2, the surface of the pressure-sensitive adhesive layer A1, in Comparative Example 3, the surface on the release liner D1 side of the pressure-sensitive adhesive layer D (the surface on the side where the fiber tip of the fiber raised portion is not located outside the surface), Comparative Example 4, the surface of the pressure-sensitive adhesive layer J <b> 1, and the back side surface (the other side) [In Examples 1 to 3, the surface on the side of the release liner having the perforated part (release liners A <b> 1 to C <b> 1 having the perforated part). In Examples 4 to 6, a release liner having a perforated portion (perforated A release liner D2 to F2) side surface, a release liner having a perforated portion (release liner G1 to J1 having a perforated portion) side in Examples 7 to 10, a release liner A1 side surface in Comparative Example 1, In Comparative Example 2, the surface on the side of the release liner A1 having a perforated portion, in Comparative Example 3, the surface on the side of the release liner D2 having a perforated portion, in Comparative Example 4, the release liner having the perforated portion (release liner J1 having a perforated portion) side Are wound in a roll shape to produce a wound body.

  Furthermore, after storing this wound body at 50 ° C. for one day, it is rewound, and at this time, it is sensuously confirmed whether or not it can be easily rewound. If it could not be easily rewound, it was evaluated as “bad”.

  These evaluation results are shown in the columns of “Attachment position correction workability”, “Adhesive strength recovery rate (%)”, and “Rewinding property” in Table 1 or Table 2, respectively.

  As is clear from Table 1, the pressure-sensitive adhesive sheet according to the example (the pressure-sensitive adhesive sheet in which the fibers of the fiber raised portion protrude from the surface of the pressure-sensitive adhesive layer and the release treatment is applied to the tip portion of the fiber) Later position correction was easy, and it was confirmed that the adhesive strength after strong attachment was good. In addition, the release liner is laminated only on the pressure-sensitive adhesive layer surface on the pressure-sensitive adhesive surface side where the fiber tip portion of the fiber convex structure portion is located on the outside, and the surface on the release liner side is used as the back surface in a roll shape. It was confirmed that even if a wound body was produced by winding, the rewinding property was good and it could be easily rewound.

Further, when the fiber convex structure part is formed of a fiber made of a material or a material (polymer substance) having a solubility parameter of 21 ([MPa] ^1/2 ) or less, the adhesive having the fiber convex structure part formed therein It was confirmed that the surface of the agent layer can be used as the back surface.

FIG. 1 is a schematic view partially showing an example of the pressure-sensitive adhesive tape or sheet of the present invention, FIG. 1 (a) is a schematic plan view seen from the top surface of the pressure-sensitive adhesive tape or sheet, and FIG. It is a schematic sectional drawing of the XY line in a). FIG. 2 is a schematic view partially showing another example of the pressure-sensitive adhesive tape or sheet of the present invention, FIG. 2 (a) is a schematic plan view seen from the top surface of the pressure-sensitive adhesive tape or sheet, and FIG. It is a schematic sectional drawing of the X'-Y 'line | wire in 2 (a). FIG. 3 is a schematic cross-sectional view partially showing another example of the pressure-sensitive adhesive tape or sheet of the present invention. FIG. 4 is a schematic sectional view partially showing another example of the pressure-sensitive adhesive tape or sheet of the present invention. FIG. 5 is a schematic view showing a release liner having a perforated portion. FIG. 6 is a schematic cross-sectional view showing a double-sided pressure-sensitive adhesive sheet partially having a fiber raising portion whose tip portion has been release-treated on the surface of one pressure-sensitive adhesive layer. FIG. 7 is a view showing a photograph relating to the shape of the fiber raised portion formed on the double-sided pressure-sensitive adhesive sheet B in Example 2, and has a fiber raised portion on the surface, and the tip portion of the fiber raised portion is a mold release treatment. It is the figure seen from the upper surface of adhesive layer B2 made. FIG. 8 is a view showing a photograph relating to the shape of the fiber raised portion formed in the double-sided pressure-sensitive adhesive sheet B in Example 2, and is an enlarged side view of the main part showing the fiber raised portion according to FIG. 7.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Adhesive tape or sheet 2 Adhesive layer 2a The surface of the adhesive layer 2 3 Adhesive tape or base material for sheets 4 Release liner 4a Hole part of the release liner 4 5 Fiber raising part 5a It has a mold release function in the fiber raising part 5 11 Adhesive tape or sheet 21 Adhesive layer 21a Recessed portion of adhesive layer 21 21a1 Wall surface of recessed portion 21a of adhesive layer 21 21b Surface of adhesive layer 21 31 Adhesive tape or release liner for sheet 41 Peeling with holes Liner 41a Hole part of release liner 41 51 Fiber raising part 51a Site having release function in fiber raising part 51 12 Adhesive tape or sheet 22 Adhesive layer 22a Surface of adhesive layer 22 32 Adhesive tape or sheet base Material (base material)
42 Release liner 42a Hole portion of release liner 42 Fiber raised portion 52a Site having release function in fiber raised portion 52 62 Adhesive layer 13 Adhesive tape or sheet 23 Adhesive layer 23a Recessed portion of adhesive layer 23 23a1 Wall surface 23b of concave portion 23a of adhesive layer 23 Surface of adhesive layer 23 33 Adhesive tape or base material for sheet (base material)
43 Release liner having a hole portion 43a Hole portion of the release liner 43 53 Fiber raising portion 53a Site having a releasing function in the fiber raising portion 53 63 Adhesive layer 7 Release liner having a perforated portion 7a Perforated portion 8 Double-sided adhesive Sheet 8a Release liner 8b Adhesive layer 8c Substrate 8d Adhesive layer 8e having a fiber raised portion whose tip is partly treated on the surface 8e Release liner 8f having a perforated portion 8f Release liner 8e Perforated part 8g Fiber raising part formed on the surface of the pressure-sensitive adhesive layer 8d and the tip part is subjected to release treatment 8h Tip part of the fiber raising part 8g subjected to release treatment

Claims (11)

A pressure-sensitive adhesive tape or sheet in which a pressure-sensitive adhesive layer is formed on at least one surface of a support, wherein the fiber convex structure part is partially formed on the pressure-sensitive adhesive layer on at least one surface of the support. Is formed in a form that is located outside the surface of the pressure-sensitive adhesive layer, and at least the tip portion of the fiber located outside the surface of the pressure-sensitive adhesive layer in the fiber convex structure portion, A pressure-sensitive adhesive tape or sheet having a release function. The surface of the pressure-sensitive adhesive layer is protected by a release liner having a hole, and the tip portion of the fiber located outside the surface of the pressure-sensitive adhesive layer has a hole in the release liner. The pressure-sensitive adhesive tape or sheet according to claim 1, wherein the fiber convex structure is formed in a form located outside the outer surface of the release liner. The pressure-sensitive adhesive tape or sheet according to claim 2, wherein the pressure-sensitive adhesive tape or sheet is a double-sided pressure-sensitive adhesive tape or sheet, and the release liner having a hole is a release liner whose both surfaces are release surfaces. The pressure-sensitive adhesive tape or sheet according to any one of claims 1 to 3, wherein the fiber convex structure is partially formed on the surface of the pressure-sensitive adhesive layer on at least one surface of the support. A concave portion is partially formed in the pressure-sensitive adhesive layer on at least one surface of the support, and the fiber convex structure portion is formed on the wall surface of the concave portion, and at least a part of the fibers is more than the surface of the pressure-sensitive adhesive layer. The pressure-sensitive adhesive tape or sheet according to any one of claims 1 to 3, wherein the pressure-sensitive adhesive tape or sheet is formed in a form protruding outward. The pressure-sensitive adhesive tape or sheet according to any one of claims 1 to 5, wherein the fiber convex structure portion is a fiber raised portion having a structure in which the fibers are erected from the formed surface. The pressure-sensitive adhesive tape or sheet according to any one of claims 1 to 6, wherein the fiber convex structure is formed by fiber implantation. The fiber which forms a fiber convex structure part is a fiber which has a mold release function by the mold release process of a surface, or a fiber whose solubility parameter is 21 ([MPa] < ^1/2 >) or less. Adhesive tape or sheet. A method for producing the pressure-sensitive adhesive tape or sheet according to any one of claims 1 to 8, wherein a flocking process is performed on the surface of the pressure-sensitive adhesive layer on at least one surface of the support using a flocking process. By applying, the fiber convex structure part is partially formed on the pressure-sensitive adhesive layer in such a form that at least a part of the fiber is located outside the surface of the pressure-sensitive adhesive layer, and then the fiber convexity A method for producing a pressure-sensitive adhesive tape or sheet, comprising subjecting at least a tip portion of a fiber located outside the surface of the pressure-sensitive adhesive layer in the shaped structure portion to a release treatment with a release treatment agent. A method for producing the adhesive tape or sheet according to any one of claims 1 to 8, wherein the fiber has a release function at a predetermined site in advance, or the solubility parameter is 21 ([ MPa] ^1/2 ) Using the fiber below, the flocking method is used to perform flocking on the surface of the pressure-sensitive adhesive layer on at least one side of the support, thereby partially applying the pressure-sensitive adhesive layer to the pressure-sensitive adhesive layer. The method for producing a pressure-sensitive adhesive tape or sheet is characterized in that at least a part of the fiber is formed on the outside of the surface of the pressure-sensitive adhesive layer. In a state where a release liner having a hole is superposed on the surface of the pressure-sensitive adhesive layer, the surface of the pressure-sensitive adhesive layer is subjected to flocking treatment, whereby fibers are formed on the surface of the pressure-sensitive adhesive layer corresponding to the hole of the release liner. The manufacturing method of the adhesive tape or sheet | seat of Claim 9 or 10 which forms a convex structure part.

Images