WO2021206025A1

WO2021206025A1 - Film attaching set, film attaching liquid, and method for using film attaching set

Info

Publication number: WO2021206025A1
Application number: PCT/JP2021/014358
Authority: WO
Inventors: 勇輝室井
Original assignee: 凸版印刷株式会社
Priority date: 2020-04-09
Filing date: 2021-04-02
Publication date: 2021-10-14
Also published as: JP2021166575A

Abstract

This film attaching set comprises a thin film with a thickness of 50 nm to 3 μm, and a film attaching liquid. The weight of the film attaching liquid after said film attaching liquid has been dried for 10 minutes at 40°C is treated as the post-short drying period weight. The difference between the pre-drying weight of the film attaching liquid and said post-short drying period weight, expressed as a percentage in relation to the pre-drying weight, is 10% to 35%.

Description

How to use the film sticking set, the film sticking liquid, and the film sticking set

The present disclosure relates to a film sticking set used for sticking a thin film to a sticking body, a film sticking liquid material, and a method of using the film sticking set.

A thin film having a thickness of several tens of nm to several μm has high followability to the surface shape of skin and organs, and therefore sticks to the surface. Therefore, it has been proposed to use the thin film for medical applications such as wound treatment and cosmetic applications such as skin care and makeup (see, for example, Patent Documents 1 to 3).

When using a thin film, for example, a sticking sheet, which is a laminate of a thin film and a supporting base material that supports the thin film, is placed on a sticking body, which is a skin or an organ, of the thin film and the sticking body. Arrange so that it is in contact with the surface. Then, by peeling off the supporting base material, the thin film is attached to the object to be attached.

JP-A-2017-19116 Japanese Patent No. 6495656 Japanese Patent No. 5572263

Patent Documents 1 to 3 describe that a liquid material such as water, a lotion, or a milky lotion is used when the thin film is attached to the object to be attached. There are various purposes for using the liquid material, such as to moisturize the skin and to make it easier to peel off the supporting base material, but in any case, the liquid material is interposed between the thin film and the adherend. , The effect of making it difficult for air to enter between the thin film and the object to be attached can be obtained. Then, as the liquid material between the thin film and the object to be attached evaporates and decreases, the surface of the thin film comes into close contact with the object to be attached.

Here, if a large amount of the liquid material remains between the thin film and the material to be attached without vaporizing, the thin film cannot come into contact with the material to be attached, so that the contact area between the thin film and the material to be attached is reduced. , The adhesion of the thin film to the object to be attached is reduced. Further, if the vaporization rate of the liquid material is slow, the thin film is deformed such as wrinkles due to the movement of the user or the like before the liquid material disappears and the thin film comes into contact with the object to be attached. As a result, a gap is formed between the thin film and the object to be attached, and sufficient adhesion cannot be obtained.
Therefore, there is still room for improvement in what kind of liquid material is used when the thin film is attached.

An object of the present disclosure is to provide a film sticking set, a film sticking liquid, and a method of using the film sticking set, which can enhance the adhesion of the thin film to the sticking body.

The film sticking set for solving the above problems includes a thin film having a thickness of 50 nm or more and 3 μm or less and a film sticking liquid, and after the film sticking liquid is dried at 40 ° C. for 10 minutes. The weight of the film-pasting liquid is the weight after short-term drying, and the ratio of the difference between the pre-drying weight of the film-pasting liquid and the short-term drying weight to the pre-drying weight is 10% or more and 35%. It is as follows.

The film-pasting liquid that solves the above problems is a film-pasting liquid that is used when a thin film is attached to an object to be attached, and the thin film has a thickness of 50 nm or more and 3 μm or less. The ratio of suppressing the evaporation amount of water having a temperature equal to the human body temperature at the place where the thin film is arranged to the evaporation amount when the thin film is not arranged is 5% or more and 70% or less. The weight of the film-pasting liquid after drying the film-pasting liquid at 40 ° C. for 10 minutes is the weight after short-term drying, and the weight before drying and the weight after short-term drying of the film-pasting liquid The ratio of the difference to the weight before drying is 10% or more and 35% or less.

According to each of the above configurations, the vaporization of the liquid material for film attachment proceeds accurately. Therefore, it is possible to prevent the liquid material for film attachment from remaining between the thin film and the object to be attached. Further, the vaporization of the liquid material for film attachment is too fast to form a gap between the thin film and the object to be attached, and the vaporization of the liquid material for film attachment is too slow to cause deformation such as wrinkles on the thin film. Is generated, and the formation of a gap between the thin film and the object to be attached is suppressed. Therefore, the adhesion of the thin film to the object to be attached is enhanced.

The method of using the film sticking set that solves the above problems includes supplying the film sticking liquid on the sticking body and arranging the thin film on the sticking body.

According to the above method, the supply of the liquid material for attaching the film suppresses the entry of air between the thin film and the object to be attached. Then, the vaporization of the liquid material for attaching the film proceeds accurately, so that the adhesion of the thin film to the object to be attached is enhanced.

According to the present disclosure, it is possible to improve the adhesion of the thin film to the object to be attached.

The figure which shows an example of the cross-sectional structure of a thin film about one Embodiment of a film sticking set. The figure which shows another example of the cross-sectional structure of the thin film of one Embodiment. The figure which shows an example of the cross-sectional structure of the sticking sheet of one Embodiment. The figure which shows another example of the cross-sectional structure of the sticking sheet of one Embodiment. The figure which shows the liquid material for film sticking supplied on the sticking body in the method of using the film sticking set of one Embodiment. The figure which shows the sticking sheet arranged on the sticking body in the usage of the film sticking set of one Embodiment. The figure which shows the thin film which the support base material was peeled off in the method of using the film sticking set of one Embodiment. The figure which shows the thin film which adhered to the sticking body in the method of using the film sticking set of one Embodiment.

An embodiment of a film sticking set, a film sticking liquid, and a method of using the film sticking set will be described with reference to the drawings.
The film sticking set of the present embodiment includes a thin film and a liquid material for sticking a film. The thin film may form a sticking sheet by being supported by a supporting base material. The film sticking set is used for sticking a thin film to a sticking body. The material to be attached is not particularly limited, but the film application set of the present embodiment is preferably used when the object to be attached is a living body such as skin or an organ.

[Thin film]
As shown in FIG. 1, the thin film 10 has a first surface 10F and a second surface 10R which is a surface opposite to the first surface 10F. When the thin film 10 is attached to the affixed body, the first surface 10F faces the affixed body, and the second surface 10R faces the side opposite to the affixed body.

The thickness of the thin film 10 is 50 nm or more and 3 μm or less. When the thickness of the thin film 10 is 3 μm or less, the thin film 10 can easily follow the surface shape of the object to be attached, so that the thin film 10 can be easily attached to the object to be attached. Further, the liquid material for attaching the film easily penetrates the thin film 10. Further, when the body to be attached is skin, if the thickness of the thin film 10 is 3 μm or less, it is difficult for the user to remember the feeling that the skin is pulled at the portion where the thin film 10 is attached. From the viewpoint of enhancing these effects, the thickness of the thin film 10 is more preferably 1000 nm or less, and further preferably 600 nm or less. Further, when the thickness of the thin film 10 is 50 nm or more, the strength of the thin film 10 can be obtained satisfactorily, so that the thin film 10 can be easily manufactured and handled. In order to enhance such an effect, the thickness of the thin film 10 is more preferably 100 nm or more, and further preferably 150 nm or more.

The thickness of the thin film 10 may be a thickness obtained by measurement using a film thickness meter or measurement by cross-sectional observation with a scanning electron microscope, or may be the weight per unit area of the thin film 10. It may be the average thickness converted from the density. When the thin film 10 has irregularities or a gradient in thickness, the average thickness obtained from the weight and density per unit area of the thin film 10 is adopted. The weight per unit area of the thin film 10 is, for example, ^{a region having an area of 100 cm 2 on} the surface of the thin film 10 as a measurement region, and 10 or more measurement regions are randomly cut out from the thin film 10 and each measurement region. It is obtained by averaging the weights of. When the density of the thin film 10, for example, is 1.0 g / cm ³ or more 1.5 g / cm ³ or less, a weight per unit area of the thin film 10, 0.05 g / ^{m 2} or more 4.5 g / ^{m 2} It is preferable that it is as follows.

The material of the thin film 10 is not particularly limited as long as it is a material capable of forming the thin film 10 to the above thickness. The main components of the thin film 10 include, for example, polylactic acid, polyglycolic acid, polycaprolactone, polyester such as polydioxanone, polyolefin such as polyethylene and polypropylene, polyvinyl alcohol, polyamide, polyimide, polyethylene glycol (polyethylene oxide), polypropylene glycol ( Polypropylene oxide), polyvinylpyrrolidone, polytetrafluoroethylene, polystyrene, poly (meth) acrylic acid, polyurethane, polyvinyl acetate, polyvinyl chloride, polyvinylidene chloride, polysiloxane, cellulose, hyaluronic acid, polysaccharides such as chitosan, gelatin , Collagen, casein, fibroin and other proteins, and modified products and copolymers of these polymer materials can be used. One type of these materials may be used alone, or two or more types may be used in combination.

The material of the thin film 10 can be selected in consideration of the affinity with the liquid material for film attachment, the permeability of the liquid material for film attachment, and the like. Further, when the adherend is a living body, the material of the thin film 10 preferably has biocompatibility.

The thin film 10 contains a compound having at least one functional group of a hydroxy group, a carboxy group, an amide bond, an imide bond, a urethane bond, an amino group, a carbonyl group, an ester bond, and an ether bond in the material thereof. Is preferable. Among them, the thin film 10 preferably contains a compound having at least one functional group of a hydroxy group, a carboxy group, an amide bond, and a urethane bond.

Since the thin film 10 contains the above functional groups, interactions such as hydrogen bonds are likely to occur between the thin film 10 and the material to be attached or the liquid material for attaching the film. Therefore, the adhesion of the thin film 10 to the object to be attached is likely to be improved.

For example, when the attached body is a living body such as skin, mucous membrane, nail, organ, etc., the attached body is composed of a protein and has a hydroxy group, a carboxy group, an amino group, etc. in its molecule. When the thin film 10 contains the above functional groups, an interaction such as a hydrogen bond occurs between the functional groups of the thin film 10 and the functional groups of the adherend, so that the adhesion between the thin film 10 and the adherend is adhered to. Is enhanced.

Examples of the compound having a hydroxy group include polyvinyl alcohol and polysaccharides. Examples of the compound having a carboxy group include poly (meth) acrylic acid and the like. Examples of the compound having an amide bond include polyamide and protein. Further, the amide bond may be a cyclic amide, and a compound having a lactam structure such as polyvinylpyrrolidone can easily obtain the same effect as that of a polyamide or the like. Examples of the compound having an imide bond include polyimide and the like. Examples of the material having a urethane bond include polyurethane and the like. Examples of the compound having an amino group include proteins and the like. Examples of the compound having an ester bond include polyester, poly (meth) acrylic acid ester, polyvinyl acetate, polysaccharide and the like. Examples of the compound having an ether bond include polyethers such as polyethylene glycol and polypropylene glycol. The functional group may be contained in the main skeleton of the compound or in the side chain. Further, as a modified product, the functional group may be introduced into the material of the thin film 10.

The functional group may be contained in a polymer material which is a main component of the thin film 10, or a compound containing the functional group may be added to the material of the thin film 10 in addition to the main component. good. The main component of the thin film 10 is the material having the highest content ratio in the thin film 10. Further, the functional group may be contained at least in the material constituting the first surface 10F in contact with the object to be attached. Therefore, the functional group may be introduced into the thin film 10 by the surface treatment on the first surface 10F. Examples of the surface treatment include corona treatment, plasma treatment, frame treatment, primer treatment, ultraviolet irradiation treatment and the like.

The thin film 10 may contain various additives. The additive is, for example, an adjusting agent for adjusting the characteristics of the thin film or a functional substance that exerts a predetermined function on the adherend. The adjusting agent is, for example, a high refractive index material, a low refractive index material, a light absorber, a dye for adjusting the optical characteristics of the thin film 10, a modifier for adjusting the wettability, a conductive material, or the like. be. Functional substances are, for example, cosmetics or cosmetic ingredients used for skin care such as moisturizing creams and beauty essences, fragrances, pigments, drugs, enzymes and the like. One type of additive may be used alone, or two or more types may be used in combination.

The thin film 10 may have a single-layer structure composed of a single layer as shown in FIG. 1, or may have a multi-layer structure composed of two or more layers as shown in FIG. You may. Since the thin film 10 has a multi-layer structure, a plurality of layers included in the thin film 10 can share different functions with each other, so that the functions of the thin film 10 can be improved and the functions can be increased.

In the example shown in FIG. 2, the thin film 10 includes a contact layer 11 and a functional layer 12. The contact layer 11 includes the first surface 10F and faces the attached body when the thin film 10 is attached to the attached body. The functional layer 12 includes the second surface 10R, and when the thin film 10 is attached to the attached body, covers the contact layer 11 on the opposite side to the attached body.

As the main components of the contact layer 11 and the functional layer 12, the above-mentioned polymer material exemplified as the main component of the thin film 10 may be used. The main components of the contact layer 11 and the functional layer 12 may be the same or different.

The contact layer 11 is composed of a material that is less affected by irritation or the like on the material to be attached and a material that exerts a predetermined function on the material to be attached. For example, the contact layer 11 may contain a cosmetic component, a drug, an enzyme, or the like that exerts a predetermined function on the adherend.

When it is desired to include an additive in the thin film 10 that does not like contact with the adherend, the action of the additive can be extended to the adherend by including the additive in the functional layer 12. The function of the additive can be imparted to the thin film 10 while being suppressed. Examples of such additives include compounds having corrosive, irritating and sensitizing properties. Specific examples of cosmetic applications include antioxidants, preservatives, oils, surfactants, ultraviolet absorbers, fragrances, pigments and the like.

Further, it is preferable that the material containing the functional group for the above-mentioned interaction is contained in the contact layer 11. Alternatively, as described above, the functional group may be introduced into the contact layer 11 by surface treatment on the first surface 10F, which is the surface of the contact layer 11.

The blockage rate Rb of the thin film 10 is a parameter indicating the degree of gas permeability in the thin film 10. The occlusion rate Rb is a ratio that suppresses the transpiration amount of water having a temperature equal to the human body temperature at the place where the thin film 10 is placed with respect to the transpiration amount when the thin film 10 is not placed. A low blockage rate Rb means that there are many permeable pathways for gas molecules in the thin film 10. That is, it means that when the thin film 10 is attached to the object to be attached, the liquid material for attaching the film is easily vaporized through the thin film 10.

The blockage rate Rb is determined by using a reference transpiration amount corresponding to the transpiration amount when the thin film 10 is not arranged and a target water transpiration amount corresponding to the transpiration amount when the thin film 10 is arranged. It is calculated by the following (Equation 1).

Blockage rate Rb (%) = (standard water evaporation amount-target water evaporation amount) / standard water evaporation amount x 100 ... (Equation 1)

The reference water transpiration amount and the target water transpiration amount are measured by the following methods.
(1) Hot water in a water bath maintained at 37 ° C. is circulated in a container having an arbitrary volume. A glass bottle is placed in the container, and warm water at 37 ° C. is placed in the glass bottle up to a position 4 cm vertically away from the opening of the glass bottle.

(2) A plastic plate with a hole with a diameter of 10 mm is placed in the opening of the glass bottle after the operation of (1) above, and a PTFE membrane filter (manufactured by Merck Millipore, pore diameter: 10 μm, diameter: 25 mm, white) is placed in the hole. Cover with plain) and leave for 5 minutes.

(3) Using a percutaneous moisture transpiration measuring device (ASCH JAPAN: VAPO SCAN AS-VT100RS), adjust the probe to a diameter of 10 mm, and adjust the probe to the diameter of 10 mm, and the moisture at the position of the hole in the plastic plate after the operation of (2) above. The amount of transpiration is measured on a membrane filter, and the measured value is used as the reference amount of transpiration.

(4) Stick the thin film 10 on the membrane filter after the operation of (2) above, and leave it for 5 minutes. A sticking sheet provided with the thin film 10 is used for sticking the thin film 10.

(5) Using the percutaneous water evaporation amount measuring device, the water evaporation amount at the position of the hole of the plastic plate after the operation of the above (4) is measured on the thin film 10 in the same manner as the above (3). , Let the measured value be the target transpiration amount.

The blockage rate Rb of the thin film 10 is preferably 5% or more and 70% or less. When the blockage rate Rb is within the above range, vaporization of the liquid material for film attachment through the thin film 10 is likely to proceed moderately. That is, when the blockage rate Rb is 70% or less, it is easy to prevent the liquid material for film sticking from vaporizing and excessively remaining between the thin film 10 and the sticking body, and the blockage rate Rb is 5%. With the above, it is easy to prevent the vaporization of the liquid material for film attachment from progressing rapidly and the formation of voids between the thin film 10 and the object to be attached. Therefore, the adhesion of the thin film 10 to the object to be attached is likely to be improved.

Further, the higher the blockage rate Rb within the above range, the more the evaporation of water from the surface of the adherend is suppressed. For example, when the thin film 10 is used for beauty purposes and the thin film 10 is attached to the skin, if the obstruction rate Rb is 5% or more, the thin film 10 can be attached to obtain a good moisturizing effect on the skin. Be done. Further, in medical applications, when the thin film 10 is used for a moisturizing therapy that improves the wound healing environment by moistening or a closed sealing method that enhances the penetration of a drug into the skin, if the occlusion rate Rb is 30% or more, the thin film. By attaching 10 to the surface of a living tissue such as skin or an organ, a state of excess water can be suitably formed on the surface of the living tissue. Therefore, the healing promoting effect in a moist environment and the penetration promoting effect of the drug can be satisfactorily obtained. The higher the blockage rate Rb, the easier it is to obtain the moisturizing effect, but on the other hand, the liquid material for film attachment tends to remain between the thin film 10 and the object to be attached. It is preferable to select the magnitude of the occlusion rate Rb.

The blockage rate Rb of the thin film 10 can be adjusted by adjusting the thickness and material of the thin film 10. For example, the thinner the thin film 10, the easier it is for gas to permeate the thin film 10, so that the blockage rate Rb becomes lower. The thinner the thin film 10, the higher the followability of the thin film 10 with respect to the surface shape of the object to be attached, while the strength of the thin film 10 decreases, so that the operability of the thin film 10 decreases. The thickness of the thin film 10 is preferably selected in consideration of such followability and operability.

Further, in order to adjust the blockage rate Rb, a through hole or a gap may be provided in the thin film 10. By providing the through holes and voids, the gas easily permeates through the thin film 10, so that the blockage rate Rb becomes low. When the thin film 10 includes a plurality of layers, through holes and voids may be formed only in a part of the layers, or may be formed in the entire thin film 10.

Further, the thin film 10 may contain an additive for adjusting the blockage rate Rb. For example, when the thin film 10 contains additives such as layered inorganic compounds, inorganic compound particles, organic compound particles, and organic-inorganic hybrid materials, such additives hinder the permeation of gas in the thin film 10. Therefore, the blockage rate Rb becomes high. When the thin film 10 includes a plurality of layers, the additive may be contained in only a part of the layers or may be contained in all the layers.

As the layered inorganic compound, fine pieces of clay minerals such as mica, montmorillonite, saponite, hectorite, fluorohectorite and other smectites, kaolinite and other kaolins, macadiaite, kenyaite and kanemite can be used. These clay minerals are mainly composed of layered silicate minerals. The layered inorganic compound can also be used as an organic-inorganic hybrid material by performing organic modification between layers. In addition, as the organic-inorganic hybrid material, various silicones and various silane coupling agents can be used. As the inorganic material constituting the inorganic compound particles, metals such as Si, Al, Cu, and Ag and oxides thereof can be used. As the organic material constituting the organic compound particles, polyester, polypropylene, polyethylene, polystyrene, polyurethane, acrylic resin, copolymers thereof, blended resin and the like can be used. The shape of the particles is not particularly limited.

[Attachment sheet]
As shown in FIG. 3, the sticking sheet 20 includes a thin film 10 and a supporting base material 21 that supports the thin film 10. The second surface 10R of the thin film 10 is in contact with the support base material 21.

The support base material 21 suppresses scratches and tears caused by contact with an external article on the thin film 10 during the manufacture, distribution, and use of the sticking sheet 20. Further, when the thin film 10 is moved onto the body to be attached when the thin film 10 is attached, the thin film 10 is supported by the supporting base material 21, which makes the thin film 10 easier to handle.

The support base material 21 preferably has a liquid absorbing property for a liquid material for attaching a film. When the thin film 10 is attached, the support base material 21 preferably absorbs the liquid material for attaching the film, causing a volume change or the like and easily peeling off from the thin film 10.

The liquid absorption rate Ra of the support base material 21 is a parameter indicating the degree of liquid absorption of the support base material 21 with respect to the liquid material for film attachment. The liquid absorption rate Ra of the support base material 21 is a ratio of the liquid absorption state weight of the support base material 21 to the standard state weight, and is calculated by the following (Equation 2).

Liquid absorption rate Ra (%) = weight in liquid absorption state / weight in standard state x 100 ... (Equation 2)

The standard state weight and the liquid absorption state weight are measured by the following methods.
The standard state weight is the weight of the supporting base material 21 in the standard state specified in JIS L 0105-2006. That is, in the standard state, the supporting base material 21 is placed in an environment of 20 ± 2 ° C. and a relative humidity of 65 ± 4%, and its mass is measured at intervals of 1 hour or more, and the mass is measured at intervals of 1 hour or more, and the mass is measured from the time of the previous measurement. It is the weight in a state where the amount of change in mass is 0.1% or less of the subsequent mass.

The weight in the liquid absorbing state is such that the supporting base material 21 in the standard state is immersed in a liquid material to be absorbed at 20 ± 2 ° C. for 15 minutes or more, and then the supporting base material 21 is taken out from the liquid material with tweezers. It is the weight of the supporting base material 21 in a state where the liquid material is dropped for 1 minute.
The standard state weight and the liquid absorption state weight are measured using a support base material 21 formed into a predetermined shape such as a square shape having a side of 10 cm.

The liquid absorption rate Ra of the support base material 21 with respect to the liquid material for film attachment is preferably 150% or more. When the liquid absorption rate Ra is 150% or more, the liquid material for film attachment on the support base material 21 can sufficiently absorb the liquid. Therefore, when the thin film 10 is attached, the thin film 10 and the object to be attached are used. The liquid material for sticking the film between the two is easily absorbed by the sticking sheet 20. Therefore, the thin film 10 and the object to be attached are easily brought into close contact with each other at an early stage. The upper limit of the liquid absorption rate Ra of the support base material 21 is not particularly limited, but for example, when the liquid absorption rate Ra is 500% or less, the support base material 21 is prevented from excessively absorbing the liquid material for film attachment. Therefore, the support base material 21 can be easily handled.

The material of the support base material 21 is not particularly limited. In order to accurately develop the above-mentioned liquid absorbency in the support base material 21, at least a part of the support base material 21 is one of a liquid absorbable film, a woven fabric, a knitted fabric, a non-woven fabric, and paper. It is preferably composed of.

Various materials for the liquid-absorbent film include polyester, polyolefin, polyamide, polyimide, polyvinyl alcohol, polyurethane, polyvinyl acetate, polyvinyl chloride, polyvinylidene chloride, polycarbonate, acrylic resin, polysiloxanes, cellulose, casein and the like. Examples include proteins, rubbers, modified products of these polymer compounds, copolymers and mixtures. The liquid-absorbent film may be a film that has been subjected to processing such as embossing, drilling, and porosity by foaming or the like.

The fibers constituting the woven fabric, knitted fabric, and non-woven fabric include, for example, natural fibers such as cotton, linen, silk, and hair, recycled fibers such as rayon and cupra, semi-synthetic fibers such as acetate, polyamide, polyester, polyethylene, and polypropylene. , Polyurethane, synthetic fibers such as polyacrylic acid and the like. When the support base material 21 is made of a fiber material, the support base material 21 may be made of one kind of fiber or may be made of two or more kinds of fibers.

When the support base material 21 is made of a fiber material, the weight of the support base material 21 per unit area ^{is preferably 3 g / m 2} or more and 200 g / m ² or less, and 10 g / m ² or more and 100 g. More preferably, it is / m ^{2 or less.} When the basis weight is within the above range, the support base material 21 has good liquid absorbency, and the volume and fiber diameter of the support base material 21 are likely to change due to the liquid absorption. Therefore, the support base material 21 is made of a thin film. It becomes easy to peel off from 10. Further, when the basis weight is 3 g / m ² or more, the strength of the support base material 21 is satisfactorily obtained, and the support base material 21 becomes easy to handle. Further, when the basis weight is 200 g / m ² or less, the liquid absorption to the supporting base material 21 can easily proceed smoothly.

As shown in FIG. 4, the sticking sheet 20 may include a protective layer 22 that covers the first surface 10F of the thin film 10. By providing the protective layer 22, it is possible to prevent the first surface 10F of the thin film 10 from being scratched or torn due to contact with an external article.

As the protective layer 22, a resin film or a metal foil can be used in addition to the various base materials exemplified as the material of the support base material 21. As the resin film, for example, a resin film composed of polyester, polyamide, polyimide, polyolefin, polystyrene, poly (meth) acrylic acid, polyurethane, polyvinyl alcohol, and a copolymer thereof can be used. The resin film may be a stretched film or an unstretched film. As the material of the metal foil, aluminum, aluminum alloy, stainless steel, oxygen-free copper, tough pitch copper, phosphorus deoxidized copper, brass, phosphor bronze, electrolytic copper, nickel, iron-nickel alloy, titanium and the like can be used. The protective layer 22 may be composed of a single layer or may be composed of a plurality of layers.

[Liquid for film application]
The viscosity of the liquid material for film attachment is not particularly limited as long as it has a fluidity that allows it to be applied to the material to be attached. The components contained in the liquid material for film attachment may be uniformly dissolved in the solvent or may be dispersed in the solvent. Examples of the form of dispersion include emulsions, sol, gels, suspensions, foams and the like.

The liquid material for film sticking may be divided into small amounts according to the amount required for sticking one thin film 10 and packed in a bag or the like, and may form a film sticking set together with the thin film 10. Alternatively, a film sticking set may be formed together with the thin film 10 in a state where an amount of a film sticking liquid material that can be used for sticking a plurality of thin films 10 is filled in a container such as a bottle.

Hereinafter, the components contained in the liquid material for attaching the film will be described in detail.
The liquid material for attaching a film contains organic components such as hydrocarbons, alcohols, ketones, esters and ethers, and water-based components such as water. The liquid material for film attachment may contain only one type of component, or may be a combination of a plurality of types. When the object to be attached is a living body, a component having a small effect on the living body such as irritation and toxicity is used as a component contained in the liquid material for film attachment.

Hydrocarbon components include pentane, hexane, heptane, octane, nonane, decane, undecane, dodecane, icosan, 2-methylbutane, 2-methylhexane, 3-methylhexane, 2,2-dimethylbutane, 2,3. -Saturated hydrocarbons such as dimethylbutane, 2,2,4,6,6-pentamethylheptane, 2,2,4,4,6,6,8-heptamethylnonane, cyclohexane, 1-dodecene, 1-tetradecene , 1-Hexadecene, limonene, pinene, mildene and other unsaturated hydrocarbons, toluene, xylene and other aromatic compounds and the like.

Examples of alcohol components include monovalent compounds having a hydroxy group and divalent or higher compounds having a hydroxy group. Monovalent compounds having a hydroxy group include, for example, methanol, ethanol, propanol, isopropanol, butanol, tert-butyl alcohol, 2-butyloctanol, 9-octadeceno-1-ol, benzyl alcohol, 3-phenyl-1-propanol. Monohydric alcohols such as 2-methoxyethanol, 2-ethoxyethanol, 1-methoxy-2-propanol, 2-butoxy-1-propanol, 1- (tert-butoxy) -2-propanol, 1-phenoxy-2 -Propanol, 2- (benzyloxy) ethanol, diethylene glycol monomethyl ether, diethylene glycol monobutyl ether, polyethylene glycol monomethyl ether, polypropylene glycol monomethyl ether, monoether of a divalent compound having a hydroxy group, and the like. Divalent compounds having a hydroxy group include, for example, ethylene glycol, 1,2-propanediol, 1,3-propanediol, 1,2-butanediol, 1,3-butanediol, 1,2-pentanediol, and the like. Divalents such as 1,2-hexanediol, 1,10 decanediol, 2-methyl-1,3-propanediol, 2-methyl-2,4-pentanediol, 2-ethyl-1,3-hexanediol It is an ether compound of a dihydric alcohol such as alcohol, diethylene glycol, dipropylene glycol, triethylene glycol, tripropylene glycol, polyethylene glycol, polypropylene glycol, polyethylene glycol / polypropylene glycol copolymer and the like. Trivalent compounds having a hydroxy group include, for example, glycerin, 1,2,3-butanetriol, 1,2,4-butanetriol, 1,2,3-pentanetriol, 1,2,3-hexanetriol, 1,2,6-hexanetriol, trimethylolpropane and the like. The tetravalent compound having a hydroxy group is, for example, erythritol, pentaerythritol, diglycerin and the like.

The components of ketones include acetone, 2-butanone, 2-pentanone, 3-pentanone, 4-methyl-2-pentanone, 2,6-dimethyl-4-heptanone, 4,6-dimethyl-2-heptanone, and cyclohexanone. , Isophorone, acetylacetone, diacetone alcohol and the like.

The components of the esters include acetates such as ethyl acetate, propyl acetate, isopropyl acetate, butyl acetate, isobutyl acetate, pentyl acetate, isopentyl acetate, ethoxyethyl acetate, glycerin diacetate, and glycerin triacetate, methyl benzoate, and isobutyl benzoate. , Satyl benzoate such as -2-ethylhexyl benzoate, stearyl benzoate, benzyl benzoate, salicylate ester such as -2-butyloctyl salicylate, dimethyl succinate, bis succinate (2-ethylhexyl), bis succinate (2) -Ethoxyethyl), succinates such as bis succinate (3,6-dioxa-1-octyl), dimethyl adipate, dibutyl adipate, diisobutyl adipate, diisooctyl adipate, bis adipate (2-ethylhexyl), Diisodecyl adipate, ditridecyl adipate, bis (2-heptylundecyl) adipate, glutarate ester such as dimethyl glutarate, diethyl sebacate, diisopropyl sebacate, bis sebacate (2-ethylhexyl), Sebasic acid esters such as bis sevacinate (2-butyloctyl), bis sevacinate (2-hexyldecyl), bis sevacinate (2-octyldodecyl), maleic acid esters such as bis maleate (2-ethylhexyl), phthal Phtrate esters such as dimethyl acid, diethyl phthalate, dibutyl phthalate, bis (2-ethylhexyl) phthalate, glycolic acid esters such as dimethyl glycolate, lactic acid esters such as methyl lactate, ethyl lactate and butyl lactate, butyrolactone and the like. Examples thereof include lactones (cyclic esters) and ester compounds of two or more of these carboxylic acids and polyhydric alcohols.

Examples of the components of the ethers include diethyl ether, dimethoxymethane, diethylene glycol diethyl ether, dipropylene glycol dimethyl ether and the like.
Other organic components include amides such as N, N-dimethyldecaneamide, imides such as isopropylphthalimide and butylphthalimide, lactams such as methylpyrrolidone and ethylpyrrolidone, dimethylsulfone, ethylene carbonate, propylene carbonate and the like. Examples thereof include halogenated hydrocarbons such as carbonate ester, chlorinated paraffin, pentafluoropropane, perfluorohexane and perfluorodimethylcyclohexane.
Further, as the aqueous component, a phosphate buffered saline solution or an aqueous solution in which various inorganic salts and organic salts are dissolved such as seawater can be used.

In this embodiment, the evaporation rate Rv of the liquid material at 40 ° C. is specified as a parameter indicating the ease of vaporization of the liquid material for film attachment. The evaporation ratio Rv is the ratio of the difference between the weight after short-term drying, which is the weight of the liquid after drying at 40 ° C. for 10 minutes, and the weight before drying of the liquid, with respect to the weight before drying, and is described in the following formula (Equation 3). Calculated by.

Evaporation ratio Rv (%) = (weight before drying-weight after short-term drying) / weight before drying x 100 ... (Equation 3)

The weight before drying and the weight after short-term drying are measured by the following methods.
(1) Weigh about 2 g of the liquid material to be measured on an aluminum pan having a radius of about 20 ± 5 mm. The weight of the weighed liquid is defined as the weight before drying.
(2) The liquid material is dried by arranging the aluminum pan after the operation of (1) above for 10 minutes in an environment of 40 ± 2 ° C. For drying, a dryer equipped with a forced exhaust mechanism capable of maintaining the temperature within ± 2 ° C. can be used. The weight of the liquid remaining on the aluminum pan after drying is measured and used as the weight after short-term drying.

The evaporation rate Rv of the liquid material for film attachment is 10% or more and 35% or less. When the evaporation ratio Rv is 10% or more, the liquid material for film attachment supplied at the time of attaching the thin film is easily vaporized, so that the adhesion of the thin film to the object to be attached is enhanced. On the other hand, when the evaporation ratio Rv is 35% or less, the vaporization rate of the liquid material for film sticking is suppressed to be excessively high, so that the thin film 10 is caused by the rapid disappearance of the liquid material for film sticking. It is possible to prevent the formation of a gap between the affixed body and the affixed body.

The evaporation rate Rv of the liquid material for film sticking can be adjusted by the composition of the liquid material for film sticking. The more the compound having a high vapor pressure is contained in the liquid material for attaching a film, the larger the evaporation ratio Rv tends to be. Compounds with high vapor pressure include lower hydrocarbons such as pentane, hexane, heptane and cyclohexane, monohydric alcohols such as methanol, ethanol and 2-propanol, ketones such as acetone and 2-butanone, ethyl acetate and acetic acid. Examples thereof include esters such as propyl and isopropyl acetate, and ethers such as diethyl ether and dimethoxymethane. When the liquid material for film attachment contains a compound having a vapor pressure of about 3.5 kPa or more at 25 ° C., the evaporation ratio Rv tends to increase. By adjusting the type and amount of the compound contained in the liquid material for film sticking, the evaporation rate Rv of the liquid material for film sticking can be adjusted.

In the present embodiment, the amount of components that are difficult to vaporize in the liquid material for film attachment, in other words, the liquid material is used as a parameter indicating the ease with which the liquid material for film attachment remains between the thin film 10 and the material to be attached. The ratio of difficult-to-volatile components Rr at 40 ° C. is specified. The non-volatile component ratio Rr is the ratio of the weight after long-term drying, which is the weight of the liquid after drying at 40 ° C. for 2 hours or more, to the weight before drying of the liquid, and is calculated by the following (Equation 4). ..

Percentage of non-volatile components Rr (%) = Weight after long-term drying / Weight before drying x 100 ... (Equation 4)

The weight before drying and the weight after long-term drying are measured by the following methods.
(1) Weigh about 2 g of the liquid material to be measured on an aluminum pan having a radius of about 20 ± 5 mm. The weight of the weighed liquid is defined as the weight before drying.
(2) The liquid material is dried by arranging the aluminum pan after the operation of (1) above in an environment of 40 ± 2 ° C. for 2 hours or more. For drying, a dryer equipped with a forced exhaust mechanism capable of maintaining the temperature within ± 2 ° C. can be used. After that, the weight of the liquid material on the aluminum pan is measured at intervals of 30 minutes or more, and the weight of the liquid material when the amount of change in weight from the previous measurement is 1% or less of the subsequent weight is determined. Weight after long-term drying.

The ratio Rr of the poorly volatile component of the liquid material for film attachment is preferably 10% or less. When the non-volatile component ratio Rr is 10% or less, the amount of the liquid material for film attachment that remains between the thin film 10 and the object to be attached for a long period of time can be reduced. Therefore, the adhesion of the thin film to the object to be attached is enhanced. The lower limit of the low volatile component ratio Rr is not particularly limited, and for example, the low volatile component ratio Rr may be 0.1% or more.

The non-volatile component ratio Rr of the liquid material for film attachment can be adjusted by the composition of the liquid material for film application. As a component (volatilization suppressing component) that increases the non-volatile component ratio Rr, a compound that is liquid at room temperature with a low vapor pressure, an organic polymer compound, an inorganic compound, or the like and is a solid compound that is dissolved or dispersed in the liquid material. Can be mentioned. The volatilization inhibitor is added to the liquid material for the purpose of moisturizing, thickening, etc., for example, in cosmetic applications. For example, creams and emulsions for the purpose of moisturizing tend to contain a large amount of volatilization-suppressing components. The higher the content of the volatilization inhibitor, the larger the amount of the liquid material for film sticking remaining between the thin film 10 and the sticking body, and as a result, the adhesion of the thin film to the sticking body tends to decrease. Become. Therefore, it is preferable to adjust the content of the volatilization suppressing component in the liquid material for film sticking while balancing the purpose of containing the volatilization suppressing component and the adhesion between the thin film 10 and the object to be attached. ..

Among the volatilization-suppressing components, compounds that are liquid at room temperature with low vapor pressure include higher-grade hydrocarbons, alcohols, esters, ketones, ethers, etc., in addition to the polyfunctional compounds described later.

Among the volatilization-suppressing components, the solid compounds include polyester, polypropylene, polyethylene, polystyrene, polyurethane, acrylic resin, organic polymer compounds such as copolymers and blended resins thereof, silica, titanium oxide and oxidation. Examples thereof include metal oxides such as iron, nitrides such as boron nitride, sulfides, organic metal compounds, and inorganic minerals. As the inorganic mineral, for example, smectites such as mica, montmorillonite, saponite, hectorite, and fluorohectorite, kaolins such as kaolinite, micadiaite, kenyaite, and kanemite can be used.

Here, the liquid material for attaching a film has one or more functional groups selected from the group consisting of a hydroxy group, a carboxy group, an amide bond, an imide bond, an amino group, a carbonyl group, an ester bond, and an ether bond. However, it is preferable to contain a polyfunctional compound which is a compound having a valence of divalent or higher due to the functional group. The polyfunctional compound may be a compound containing two or more kinds of functional groups, or may be a compound containing two or more kinds of functional groups. Since the liquid material for film sticking contains a polyfunctional compound, an interaction is likely to occur between the liquid material for film sticking and the thin film 10 or the sticking body. Therefore, even if the liquid material for film attachment remains between the thin film 10 and the object to be attached, it is possible to prevent the adhesion between the thin film 10 and the object to be attached from being lowered.

The polyfunctional compound may be contained in the component measured as the weight after long-term drying at the time of calculating the non-volatile component ratio Rr, or may be contained in other components. However, since the polyfunctional compound is often a poorly volatile organic compound, it is often contained in a component measured as a weight after long-term drying. Further, if the polyfunctional compound is contained in the component measured as the weight after long-term drying, the polyfunctional compound is contained in the liquid material for film attachment remaining between the thin film 10 and the object to be attached. Become. Therefore, the polyfunctional compound is preferable because it causes an interaction between each of the thin film 10 and the adherend and functions to bond the thin film 10 and the adherend.

However, if the amount of the polyfunctional compound contained in the film-sticking liquid is large, the amount of the film-sticking liquid remaining between the thin film 10 and the film-attached body increases, leading to a decrease in adhesion. As described above, the non-volatile component ratio Rr is preferably 10% or less, and the mass ratio of the polyfunctional compound in the liquid material for film attachment is also preferably 10% or less.

Specific examples of the polyfunctional compound include a compound having two or more hydroxy groups, a compound having two or more carboxy groups, a compound having two or more amino groups, and a compound having a hydroxy group and a carboxy group (hydroxylic acid). ), Compounds having a hydroxy group and an amino group (alkanolamines), and ester compounds, ether compounds, amide compounds, imide compounds, etc. of these compounds can be mentioned.

Compounds having two or more hydroxy groups include, for example, ethylene glycol, 1,2-propanediol, 1,3-propanediol, 1,2-butanediol, 1,3-butanediol, 1,2-pentanediol, and the like. 1,2-Hexanediol, 1,10 decanediol, 2-methyl-1,3-propanediol, 2-methyl-2,4-pentanediol, 2-ethyl-1,3-hexanediol, diethylene glycol, dipropylene Divalent alcohols such as glycol, triethylene glycol, tripropylene glycol, polyethylene glycol, polypropylene glycol, polyethylene glycol / polypropylene glycol copolymer, glycerin, 1,2,3-butanetriol, 1,2,4-butanetriol, 1 , 2,3-Pentanetriol, 1,2,3-hexanetriol, 1,2,6-hexanetriol, trihydric alcohols such as trimethylolpropane, tetrahydric alcohols such as erythritol, pentaerythritol, diglycerin, etc. Monosaccharides, disaccharides, polysaccharides, etc.

Compounds having two or more carboxy groups include, for example, oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, sebacic acid, maleic acid, fumaric acid, 1,4-cyclohexanedicarboxylic acid, phthalic acid, 2,6. -Divalent carboxylic acids such as naphthalenedicarboxylic acid, 1,2,3-propanetricarboxylic acid, 1,3,5-benzenetricarboxylic acid, ethylenediaminetetraacetic acid and the like. The compound may be a salt of sodium, potassium, calcium or the like.

Compounds having two or more amino groups include, for example, divalent amines such as 1,2-ethylenediamine, 1,6-hexanediamine, and phenylenediamine, and trivalent amines such as 3,3'-diaminodipropylamine. Is.

Compounds having a hydroxy group and a carboxy group (hydroxy acids) include, for example, glycolic acid, lactic acid, 2-hydroxybutyric acid, 3-hydroxybutyric acid, γ-hydroxybutyric acid, 3-hydroxypentanoic acid, 5-hydroxypentanoic acid, 3 -Hydroxy-2-phenylpropanoic acid, 2-hydroxy-2,2-diphenylacetic acid, glyceric acid, 2-hydroxypropanediic acid, 2-hydroxybutanediic acid, tartaric acid, citric acid, salicylic acid, gallic acid and the like. The compound may be a salt of sodium, potassium, calcium or the like.

Compounds having a hydroxy group and an amino group (alkanolamines) include, for example, 2-ethanol, 2,2'-dihydrodiethylamine, 2-amino-2-ethyl-1,3-propanediol, and tris (2-hydroxyethyl). Amine and the like.

In addition, as the polyfunctional compound, a compound having an ether bond between a hydroxy group contained in the above-exemplified compound and a substance having a hydroxy group, and a substance having a hydroxy group and a carboxy group contained in the above-exemplified compound. Depends on a compound having an ester bond due to, a compound having an ester bond due to a substance having a carboxy group and a hydroxy group contained in the compound exemplified above, and a substance having a carboxy group and an amino group contained in the compound exemplified above. Examples thereof include compounds having an amide bond or an imide bond, compounds having an amide bond or an imide bond due to a substance having an amino group and a substance having a carboxy group contained in the compounds exemplified above, derivatives of polysaccharides such as cellulose derivatives, proteins and the like. ..

Further, the liquid material for attaching the film may contain various additives. Additives include, for example, surfactants, fragrances, deodorants, refreshing agents, anti-inflammatory active ingredients, beauty active ingredients, moisturizing ingredients, UV absorbers, pigments, antioxidants, preservatives, chelating agents, thickening agents. Agents, pH adjusters and the like. One type of additive may be used alone, or two or more types may be used in combination.

[Manufacturing method of thin film and sticking sheet]
The method for manufacturing the thin film 10 and the sticking sheet 20 described above will be described. The method for producing the sticking sheet 20 is a first step of forming the thin film 10 on the surface of the film-forming base material and a second step of transferring the formed thin film 10 from the film-forming base material to the supporting base material 21. And include.

The first process will be explained. As a method for forming the thin film 10, a thin film forming method such as a melt extrusion method or a solution casting method is used. In the melt extrusion method, the melted material is extruded by an inflation method, a T-die extrusion method, or the like to form a thin film. In the solution casting method, the solvent of the coating liquid is removed from the coating film after the coating film is formed from the coating liquid containing the material. Of these, the solution casting method is preferably used for forming an extremely thin film such as the thin film 10.

When the solution casting method is used, in detail, a coating liquid obtained by dissolving or dispersing the material of the thin film 10 is applied onto a film-forming substrate to form a coating film. Then, the thin film 10 is formed by drying the coating film and removing the solvent of the coating liquid. When the thin film 10 includes a plurality of layers, the coating liquid is applied and the coating film is dried for each layer.

As the base material for film formation, a resin sheet made of a thermoplastic resin, a thermosetting resin, or the like is used. Further, as the base material for film formation, a resin sheet made of a material that can be released or dissolved by water or a solvent may be used. The application method of the coating liquid is not particularly limited, and for example, application methods such as gravure coat, reverse gravure coat, roll coat, reverse roll coat, die coat, bar coat, kiss coat, comma coat, curtain coat, spin coat, and spray coat can be used. Used.

The second process will be explained. The support base material 21 is arranged on the upper surface of the thin film 10 on the film-forming base material, and the thin film 10 is transferred from the film-forming base material to the support base material 21. As the transfer method, a known transfer method such as a method using peeling by suction or a method using a sacrificial film is used. As a result, a sticking sheet 20 which is a laminate of the thin film 10 and the supporting base material 21 can be obtained.

When the sticking sheet 20 includes the protective layer 22, the protective layer 22 is laminated on the first surface 10F, which is the upper surface of the thin film 10 on the support base material 21, after the second step. Further, after the second step, if necessary, the outer shape of the sticking sheet 20 may be adjusted to a desired shape by a method such as die cutting.

The thin film 10 and the sticking sheet 20 may be manufactured by a method different from the above-mentioned manufacturing method. For example, when the thin film 10 is used alone without using the support base material 21, the thin film 10 is peeled off from the film-forming base material after the first step, and the film-forming base material is dissolved to dissolve the thin film 10. The thin film 10 can be obtained as a single film by taking out the film as a single film or by peeling off the support base material 21 after the second step.

[How to use the film sticking set]
A method of using the film sticking set, that is, a method of sticking the thin film 10 will be described. The method of using the film sticking set includes a supply step of supplying a liquid material for film sticking on the sticking body and an arrangement step of arranging the thin film 10 on the sticking body. Further, when the sticking sheet 20 is used, the method of using the film sticking set includes a peeling step of peeling the support base material 21 from the thin film 10.

In the following, a case where the placement step is performed after the supply step will be described with reference to FIGS. 5 to 8.
As shown in FIG. 5, in the supply step, for example, the liquid material Lq for film attachment is supplied to the place where the thin film 10 is to be attached on the skin to be attached Sk. The amount of the liquid Lq for film attachment is preferably adjusted according to the size of the thin film 10. The supply amount is preferably 10 μL or more and 50 μL or less with respect to an area of 1 cm ^{2 of the thin film 10.} When the supply amount of the liquid material Lq for film sticking is equal to or more than the above lower limit value, the liquid material Lq for film sticking is easily distributed so as to come into contact with the entire thin film 10, and therefore, between the thin film 10 and the sticking body Sk. The ingress of air is accurately suppressed. Further, when the supply amount of the liquid material Lq for film sticking is equal to or less than the above upper limit value, the increase in the amount of the liquid material Lq for film sticking interposed between the thin film 10 and the sticking body Sk can be suppressed, so that the film It is possible to shorten the time required for drying the liquid Lq for application.

As shown in FIG. 6, in the arrangement step, the thin film 10 is arranged on the application body Sk in the region to which the film-attaching liquid Lq is supplied. At this time, the first surface 10F of the thin film 10 is directed to the attachment body Sk. When the sticking sheet 20 is used, the sticking sheet 20 is arranged so that the first surface 10F of the thin film 10 is in contact with the film sticking liquid Lq on the sticking body Sk. When the sticking sheet 20 includes the protective layer 22, the placement step is performed after the protective layer 22 is peeled off. By pressing the thin film 10 toward the attached body Sk after the arrangement step, the contact between the thin film 10 and the attached body Sk and the permeation of the film-attached liquid Lq into the thin film 10 are promoted. You may.

As shown in FIG. 7, when the sticking sheet 20 is used, a peeling step is performed after the placement step, and the supporting base material 21 is peeled from the thin film 10. If the support base material 21 has liquid absorbency, the liquid material Lq for film sticking penetrates to the support base material 21, and the liquid material Lq for film sticking between the thin film 10 and the sticking body Sk Removal is promoted. Further, since the volume and fiber diameter of the support base material 21 are changed by the liquid absorption of the support base material 21, the support base material 21 is easily peeled off from the thin film 10, so that the support base material 21 can be easily peeled off from the thin film 10. Can be peeled off.

As shown in FIG. 8, by vaporizing the film-attaching liquid Lq between the thin film 10 and the attached body Sk, the thin film 10 is moved along the surface shape of the attached body Sk. Close to. The liquid Lq for film attachment permeates through the thin film 10 and vaporizes, and also vaporizes from the vicinity of the end portion of the thin film 10.

In the film-attached liquid Lq of the present embodiment, since the evaporation ratio Rv is 10% or more and 35% or less, the vaporization of the film-attached liquid Lq proceeds accurately. Therefore, it is possible to prevent the liquid Lq for film attachment from remaining between the thin film 10 and the attached body Sk, so that the adhesion of the thin film 10 to the attached body Sk can be improved. Further, the vaporization of the liquid material Lq for film attachment is too fast to form a gap between the thin film 10 and the body Sk to be attached, and the vaporization of the liquid material Lq for film attachment is too slow to vaporize the thin film 10 It is possible to prevent the film from being deformed such as wrinkles and forming a gap between the film and the Sk to be attached. This also enhances the adhesion between the thin film 10 and the attached body Sk.

The method of using the film sticking set is not limited to the method of performing the placement step after the supply step. For example, the supply step may be performed after the placement step. In this case, the liquid Lq for film attachment is supplied to the thin film 10 arranged on the attachment body Sk. When the sticking sheet 20 is used, a supply step is performed after the placement step and before the peeling step, and the film sticking liquid Lq is applied to the support base material 21 from the opposite side to the thin film 10. It is supplied to the sheet 20. The thin film 10 penetrates between the thin film 10 and the attached body Sk, and the film-attached liquid Lq enters, and the film-attached liquid Lq enters from the vicinity of the end of the thin film 10. In order to prevent air bubbles from entering between the thin film 10 and the attached body Sk, the thin film 10 may be pressed against the thin film 10 from the side opposite to the attached body Sk after the supply step. preferable.

Further, the placement step may be performed after the supply step, and then the liquid material Lq for film sticking may be further supplied to the thin film 10 placed on the sticking body Sk. Further, after the placement step or the peeling step, the excess liquid Lq for attaching the film existing around the thin film 10 may be removed by wiping or the like. As a result, the removal of the film-pasting liquid Lq between the thin film 10 and the film-attached body Sk is promoted, and high adhesion can be obtained at an early stage.

[Example]
The above-mentioned film sticking set, film sticking liquid, and how to use the film sticking set will be described with reference to specific examples and comparative examples.

(Material for sticking sheet and film sticking liquid)
By making the thickness of the thin film, the material of the thin film, the composition of the liquid material for film sticking, and the supply amount of the liquid material for film sticking different, the film sticking set of 22 Examples and 4 Comparative Examples can be obtained. Made. The materials used in the examples and comparative examples are shown below.

<Thin film>
In each Example and each Comparative Example, the material of the thin film was selected from the following six types. In each example and each comparative example, the thin film is composed of a single layer.
Material X-1: Poly-DL-Lactic Acid Material X-2: Polyvinyl Alcohol Material X-3: Polyvinylpyrrolidone Material X-4: Sodium Polyacrylate Material X-5: Cellulose Propionate Acetate Material X-6: Polyethylene-Norbornene Copolymer

In the above materials, poly-DL-lactic acid has an ester bond. Polyvinyl alcohol has a hydroxy group. Polyvinylpyrrolidone has a lactam (cyclic amide). Sodium polyacrylate has a carboxy group in the salt state. Cellulose propionate acetate has a hydroxy group, an ester bond, and an ether bond. The polyethylene-norbornene copolymer is composed of chain hydrocarbons and cyclic hydrocarbons and does not contain functional groups.

<Supporting base material>
In all of Examples and Comparative Examples, a pulp-based non-woven fabric was used as the supporting base material. The basis weight of the pulp-based non-woven fabric is 35 g / m ² .

<Liquid for film attachment>
In each Example and each Comparative Example, the composition of the liquid material for film attachment was selected from the following 13 types. The mixing ratios described below are mass ratios.

Composition Y-1: Mixing solution of 90% water and 10% ethanol Composition Y-2: Mixing solution of 90% water, 5% ethanol and 5% glycerin Composition Y-3: 50% water and 50% ethanol Mixture composition Y-4: Mixture of 80% water, 10% ethanol and 10% glycerin Composition Y-5: Mixture of 90% water, 5% ethanol and 5% 1,3-butylene glycol Composition Y- 6: Mixed solution of 90% water, 5% ethanol and 5% ethylene glucol Composition Y-7: Mixed solution of 90% water, 5% ethanol and 5% dipropylene glycol Composition Y-8: 90% water Mixture of 5% ethanol and 5% sodium citrate Composition Y-9: Mixage of 90% water, 5% ethanol and 5% polyethylene glycol (weight average molecular weight 600) Composition Y-10: 90% water and 2 -Mixed solution with 10% propanol Composition Y-11: Mixed solution with 90% water and 10% acetone Composition Y-12: Mixed solution with 20% water and 80% glycerin Composition Y-13: 20% water and ethanol Mixture with 80%

Of the above materials, ethanol and 2-propanol are monohydric alcohols, and acetone is a compound having a ketone group. These compounds have a high vapor pressure and are easily vaporized.
Among the above materials, ethylene glycol and 1,3-butylene glycol are divalent alcohols, glycerin is a trihydric alcohol, and dipropylene glycol is a divalent compound having a hydroxy group and an ether bond. Polyethylene glycol is a compound having an ether bond in its repeating skeleton and having hydroxy groups at both ends, and sodium citrate is a trivalent compound having a carboxy group and a hydroxy group. These compounds are, in other words, polyfunctional compounds, have a low vapor pressure, and tend to remain as a liquid.

(Making a sticking sheet)
A coating liquid was prepared by dissolving the selected material from the above materials X-1 to X-6 in a solvent corresponding to the resin which is the material.

The coating liquid is applied onto a polypropylene film as a base material for film formation by using a gravure coat, and is applied so that the thickness after drying becomes the thickness set for each Example and each Comparative Example. A film was formed. A thin film was formed by drying the coating film. Next, the supporting base material was laminated on the thin film on the film-forming base material, and the film-forming base material was peeled off to prepare a sticking sheet.

(Analysis of the characteristics of thin films and liquids for film attachment)
For the thin films of each Example and each Comparative Example, the blockage rate Rb was calculated according to the method described in the above embodiment. Further, for the liquid material for film attachment of each Example and each Comparative Example, the evaporation ratio Rv and the poorly volatile component ratio Rr were calculated according to the method described in the above embodiment.

(Evaluation method)
For the film sticking sets of each Example and each comparative example, the operability of the thin film and the adhesion of the thin film to the sticking body when the thin film was stuck to the sticking body were evaluated.

<Operability>
For each Example and each Comparative Example, a sticking sheet was cut out into a square shape having a side of 4 cm to prepare a test piece. The liquid material for film attachment was supplied to the human skin to be attached, and the liquid material for film attachment was lightly stretched with a finger. Then, the test piece of the sticking sheet was placed on the skin so that the thin film and the skin faced each other. Next, the test piece was pressed from above the support base material with a load of 2N for 3 seconds, and then the support base material was pinched with fingers and peeled off from the corners of the square. After the support base material was peeled off, it was visually confirmed whether the thin film on the skin was deformed by tearing, wrinkling, or twisting.

The above test for evaluation of operability was performed on 5 test pieces for each Example and each Comparative Example. In the test, the fact that the thin film is deformed immediately after the support base material is peeled off means that the thin film is placed on the object to be attached without being deformed due to the strength of the thin film, or the thin film is formed. It means that it was difficult to peel off the supporting base material without deforming. In the evaluation of operability, among the five test pieces, the case where the test piece with deformation is 0 is "A", and the case where the test piece with deformation is one or two is "B". "C" was given when there were three or more test pieces in which deformation was observed, or when there was one or more test pieces in which the thin film could not be attached to the skin. Then, the evaluations A and B were evaluated as having good operability, and the evaluation C was evaluated as having insufficient operability.

<Adhesion>
Similar to the test for evaluation of operability, a test piece of a sticking sheet is prepared, a liquid material for sticking a film is supplied to human skin as a sticking body, and then the test piece is stuck to a support base. The material was peeled off. Sixty minutes after the supporting base material was peeled off, the thin film was touched with a finger to check whether the thin film was peeled off from the skin or moved on the skin.

The above test for evaluation of adhesion was performed on 5 test pieces for each Example and each Comparative Example. In the evaluation of adhesion, among the five test pieces, "A" is the case where the test piece in which peeling or movement is recognized is 0, and "A" is the case where one test piece is found to be peeled or moved. "B", "C" when there were two test pieces in which peeling or movement was observed, and "D" when there were three or more test pieces in which peeling or movement was observed. Then, the evaluations A, B, and C were evaluated as having good adhesion, and the evaluation D was evaluated as having insufficient adhesion.

(Evaluation results)
Table 1 shows the material, thickness, and blockage rate Rb of the thin film for each Example and each Comparative Example, and the composition, evaporation ratio Rv, refractory component ratio Rr, and supply of the liquid material for film attachment. Indicates the amount. The blockage rate Rb, the evaporation rate Rv, and the refractory component ratio Rr are rounded off to the first decimal place. The blockage rate Rb has not been calculated for some examples. In addition, Table 1 shows the evaluation results of operability and adhesion for each Example and each Comparative Example.

As shown in Table 1, in Examples 1 to 22, the evaluation of operability and adhesion was good. Of these, in Examples 1 to 5, the thicknesses of the thin films are different from each other. It was confirmed that the thicker the thin film, the higher the blockage rate Rb and the better the operability. It is considered that this is because the thicker the thin film, the more difficult it is for the thin film to pass gas, and the higher the strength of the thin film. On the other hand, it was confirmed that the thinner the thin film, the higher the adhesion. It is considered that this is because the thinner the thin film, the easier it is for the thin film to follow the surface shape of the skin, and the liquid material for attaching the film easily permeates the thin film and vaporizes.

In Examples 3, 6 to 8, the compositions of the liquids for film attachment are different from each other, and the evaporation ratio Rv and the refractory component ratio Rr are different from each other. Good adhesion was obtained in all of the examples, but in Example 8 in which the non-volatile component ratio Rr was 10%, which was higher than the others, the adhesion was slightly low.

In Examples 3, 9 and 10, the supply amounts of the liquid material for attaching the film are different from each other. Good adhesion was obtained in both Example 9 in which the supply amount was reduced and Example 10 in which the supply amount was large, but in Example 10 where the supply amount was large, the adhesion was slightly low. There is.

In Examples 3, 11 to 15, the materials of the thin films are different from each other. Of these, in Examples 3 and 11 to 14 using a material having a functional group capable of interacting with the adherend, higher adhesion was obtained as compared with Example 15 using a material not having the functional group. ing.

In Examples 3, 16 to 22, the compositions of the liquid materials for attaching the film are different from each other. Of these, in Examples 16 to 20, the liquid material for attaching the film contains a polyfunctional compound. In Examples 3, 21 and 22, the liquid material for attaching the film contains any of ethanol, 2-propanol, and acetone, which are compounds having a high vapor pressure, and the evaporation ratio Rv exceeds 10%. In all of these Examples 3, 16 to 22, high adhesion is obtained. In Examples 16 to 20, it is considered that the adhesion is enhanced by the interaction between the polyfunctional compound and the thin film and the adherend, and in Examples 3, 21 and 22, the vaporization of the liquid material for film attachment is carried out. It is considered that the adhesion is enhanced by proceeding at an accurate speed.

On the other hand, in Comparative Example 1, the operability was poor, and there were many test pieces in which the thin film was torn when the thin film was attached. It is considered that this is because the thin film is too thin to obtain sufficient strength. Comparative Examples 2 to 4 had poor adhesion. Of these, in Comparative Example 2, it is considered that the thin film was too thick, so that the thin film did not easily follow the surface shape of the skin and the adhesion was low. Further, in Comparative Example 3, since the evaporation ratio Rv of the liquid material for film attachment is extremely low and the ratio of the non-volatile component Rr is extremely high, the amount of the liquid material for film attachment remaining between the thin film and the material to be attached is large. It is considered that the adhesion was low in many cases. Further, in Comparative Example 4, since the evaporation ratio Rv of the liquid material for film sticking was too high, the liquid material for film sticking disappeared rapidly due to vaporization, and a gap was formed between the thin film and the sticky body. It is probable that the adhesion was low.

As described above in the embodiments and examples, the effects listed below can be obtained by using the film sticking set, the film sticking liquid material, and the film sticking set.

(1) Since the evaporation ratio Rv of the liquid material for film attachment is 10% or more and 35% or less, the vaporization of the liquid material for film attachment proceeds accurately. Therefore, it is possible to prevent the liquid material for film attachment from remaining between the thin film 10 and the object to be attached. Further, the vaporization of the liquid material for film attachment is too fast to form a gap between the thin film 10 and the object to be attached, and the vaporization of the liquid material for film attachment is too slow to cause wrinkles or the like on the thin film 10. It is possible to prevent the deformation of the film and the formation of a gap between the film and the object to be attached. Therefore, the adhesion of the thin film 10 to the object to be attached is enhanced.

(2) When the non-volatile component ratio Rr of the liquid material for film sticking is 10% or less, it is possible to reduce the amount of the liquid material for film sticking that remains between the thin film 10 and the sticking body for a long period of time. be. Therefore, the adhesion of the thin film 10 to the object to be attached is further enhanced.

(3) When the blockage rate Rb of the thin film 10 is 5% or more and 70% or less, the vaporization of the liquid material for film attachment through the thin film 10 is likely to proceed appropriately. Therefore, the improvement of the adhesion of the thin film 10 to the object to be attached is promoted.

(4) At least one of a hydroxy group, a carboxy group, an amide bond, an imide bond, a urethane bond, an amino group, a carbonyl group, an ester bond, and an ether bond is added to the material constituting the first surface 10F of the thin film 10. Contains compounds that have. According to this, an interaction such as a hydrogen bond is likely to occur between the thin film 10 and the material to be attached or the liquid material for attaching the film, so that the improvement of the adhesion of the thin film 10 to the material to be attached is promoted. ..

(5) The liquid material for attaching a film has one or more functional groups selected from the group consisting of a hydroxy group, a carboxy group, an amide bond, an imide bond, an amino group, a carbonyl group, an ester bond, and an ether bond. However, it includes a compound having a valence of divalent or higher due to the functional group. According to this, an interaction such as a hydrogen bond is likely to occur between the thin film sticking liquid and the thin film 10 or the sticking body, so that the film sticking liquid is between the thin film 10 and the sticking body. Even if the film remains, it is possible to prevent the thin film 10 from being deteriorated in adhesion to the object to be attached.

(6) Since the thin film 10 is supported by the supporting base material 21, deformation of the thin film 10 is suppressed, and the thin film 10 becomes easy to handle. Further, if at least a part of the supporting base material 21 is composed of any of a liquid absorbing film, a woven fabric, a knitted fabric, a non-woven fabric, and paper, it is used for attaching a film between the thin film 10 and the object to be attached. The liquid material is easily absorbed by the sticking sheet 20. Therefore, the thin film 10 and the object to be attached are easily brought into close contact with each other at an early stage. Further, when the support base material 21 absorbs the liquid material for attaching the film, the volume and the fiber diameter of the support base material 21 change, and the support base material 21 easily peels off from the thin film 10.

(7) In the method of using the film sticking set, the liquid material for film sticking is supplied on the sticking body, and the thin film 10 is arranged on the sticking body. By supplying the liquid material for attaching the film, it is possible to prevent air from entering between the thin film 10 and the object to be attached. Then, the adhesion of the thin film 10 to the object to be attached is enhanced by the accurate vaporization of the liquid material for attaching the film.

(8) If the method of supplying the liquid material for film attachment to the affixed body before arranging the thin film 10 on the affixed body, air may enter between the thin film 10 and the affixed body. It can be suppressed accurately.

(9) The supply amount of the liquid material for attaching the film is 10 μL or more and 50 μL or less per ^{1 cm 2 of the area of the thin film 10.} According to this, since the liquid material for attaching the film is easily distributed so as to come into contact with the entire thin film 10, air can be accurately suppressed from entering between the thin film 10 and the object to be attached. Further, since it is possible to suppress an increase in the amount of the liquid material for film attachment interposed between the thin film 10 and the liquid material to be attached, it is possible to shorten the time required for drying the liquid material for film attachment.

Claims

A thin film having a thickness of 50 nm or more and 3 μm or less,
With a liquid material for film attachment,
The weight of the film-sticking liquid after drying the film-sticking liquid at 40 ° C. for 10 minutes is the weight after short-term drying, and the weight of the film-sticking liquid before drying and the weight after short-term drying A film sticking set in which the ratio of the difference to the weight before drying is 10% or more and 35% or less.
The weight of the film-sticking liquid after drying the film-sticking liquid at 40 ° C. for 2 hours or more is the weight after long-term drying, which is the weight after long-term drying with respect to the weight of the film-sticking liquid before drying. The film sticking set according to claim 1, wherein the ratio is 10% or less.
The ratio of suppressing the transpiration amount of water having a temperature equal to the human body temperature at the place where the thin film is placed to the transpiration amount when the thin film is not placed is 5% or more and 70% or less. The film sticking set according to claim 1 or 2.
The thin film has a first surface configured to be attached to the body to be attached.
The material constituting the first surface includes a compound having at least one of a hydroxy group, a carboxy group, an amide bond, an imide bond, a urethane bond, an amino group, a carbonyl group, an ester bond, and an ether bond. The film sticking set according to any one of 1 to 3.
The liquid material for attaching a film is a compound having one or more functional groups selected from the group consisting of a hydroxy group, a carboxy group, an amide bond, an imide bond, an amino group, a carbonyl group, an ester bond, and an ether bond. The film-attaching set according to any one of claims 1 to 4, which comprises the compound having a valence of divalent or higher due to the functional group.
A support base material for supporting the thin film is provided.
The film sticking set according to any one of claims 1 to 5, wherein at least a part of the supporting base material is composed of any one of a liquid-absorbent film, a woven fabric, a knitted fabric, a non-woven fabric, and paper.
A liquid material for film attachment used when attaching a thin film to an object to be attached.
The thin film has a thickness of 50 nm or more and 3 μm or less, and has a thickness of 50 nm or more and 3 μm or less.
The ratio of suppressing the transpiration amount of water having a temperature equal to the human body temperature at the place where the thin film is placed to the transpiration amount when the thin film is not placed is 5% or more and 70% or less. ,
The weight of the film-sticking liquid after drying the film-sticking liquid at 40 ° C. for 10 minutes is the weight after short-term drying, and the weight of the film-sticking liquid before drying and the weight after short-term drying A liquid material for film attachment in which the ratio of the difference to the weight before drying is 10% or more and 35% or less.
The method for using the film sticking set according to any one of claims 1 to 6.
Supplying the liquid material for film attachment onto the object to be attached, and
Placing the thin film on the adherend and
How to use the film sticking set including.
The method for using the film sticking set according to claim 8, wherein the supply amount of the film sticking liquid is 10 μL or more and 50 μL or less per 1 cm 2 of the thin film area.
The method for using the film sticking set according to claim 8 or 9, wherein the film sticking liquid material is supplied to the sticking body before the thin film is placed on the sticking body.