JP2008127720A - Steel woven fabric for reinforcing rubber article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a steel woven fabric which is used for reinforcing rubber articles, stabilizes the thrusting property of a reinforcing material composed of steel, is excellent in dimensional stability, and can achieve higher rigidity than that of a conventional steel woven fabric, in the obtained rubber articles. <P>SOLUTION: The twilled steel woven fabric is used for reinforcing rubber articles and composed by weaving warps 1 and wefts 2. The warp 1 includes a steel wire material having a wire diameter of 0.15 to 0.38 mm or steel cords composed by twisting two or more steel wire material, and the weft 2 includes a steel wire material each having a wire diameter of 0.08-0.18 mm, or the warp 1 includes a flat steel wire satisfying: W/T≥2 and 0.15≤T≤0.38 mm, wherein W is the width of the warp 1, and T is the thickness of the warp, and the weft 2 includes steel wire material having a wire diameter of 0.08-0.18 mm. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to a steel fabric for reinforcing rubber articles (hereinafter also simply referred to as “steel fabric”), and more particularly to a steel fabric for reinforcing rubber articles used as a reinforcing material for rubber articles such as pneumatic tires and industrial belts. .

In a pneumatic tire that is a typical example of a rubber article, one of the factors that lowers the dimensional stability is a driving state of a reinforcing material such as a steel cord. As a method for driving such a reinforcing material, a method in which cords are unwound one by one from a reel and rubber is pressure-bonded in the vertical direction has been used.

As a technique related to the improvement of the reinforcing material of the rubber product, for example, Patent Document 1 discloses a steel containing a C amount of 0.6% by mass or more, and has a tensile strength of 3.0 GPa or more and a drawing of 30%. A flat wire satisfying W / t ≧ 2 when the cross-sectional shape has a width W and a thickness t, and a rubber product using this for reinforcing rubber are disclosed.
JP 2002-309347 A (Claims etc.)

  However, when the conventional driving method is used, there is a problem that the gaps between adjacent reinforcing materials are not uniform. Also, in recent years, due to performance requirements such as handling stability of pneumatic tires, it has been required to realize a composite sheet (treat) of rubber and reinforcing material with higher rigidity. There is no restriction between the adjacent reinforcing members, and since they are integrated only by rubber, there is a limit to obtaining high rigidity.

  Accordingly, an object of the present invention is to provide a rubber article that is excellent in dimensional stability by stabilizing the driving property of a reinforcing material made of steel, and can achieve higher rigidity than the conventional rubber article. The object is to provide a steel fabric for reinforcing articles.

  As a result of intensive studies, the present inventor has found that the above-mentioned problems can be solved by forming a steel fabric having a twill structure using predetermined steel strands or steel cords as warp and weft, and to complete the present invention. It came.

  That is, the steel fabric for reinforcing rubber articles of the present invention is a twill-woven steel fabric for reinforcing rubber articles in which warps and wefts are woven, wherein the warps have a wire diameter of 0.15 to 0.38 mm. It consists of a steel cord formed by twisting strands or two or more steel strands, and the weft is composed of a steel strand having a wire diameter of 0.08 to 0.18 mm. Is. In this case, preferably, the warp is composed of two or more steel strands or steel cords.

  Further, another steel fabric for reinforcing rubber articles according to the present invention is a twill-woven steel fabric for reinforcing rubber articles in which warps and wefts are woven, wherein the warps have a width W and a thickness T. When W / T ≧ 2 and 0.15 mm ≦ T ≦ 0.38 mm are satisfied, and the weft is made of a steel wire having a wire diameter of 0.08 to 0.18 mm. It is a feature. In this case, preferably, the warp consists of two or more flat steel wires.

  The steel fabric for reinforcing rubber articles of the present invention preferably has gaps between the adjacent warp and weft.

  The rubber article of the present invention is characterized in that the steel fabric for reinforcing a rubber article of the present invention is used as a rubber reinforcing material.

  According to the steel fabric for reinforcing rubber articles of the present invention, the above configuration makes it possible to improve the dimensional stability of the rubber article. Further, since the rigidity of the rubber article can be increased as compared with the conventional case, the steering stability of the tire can be improved by applying the steel fabric of the present invention to the tire.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic plan view of a steel fabric for reinforcing rubber articles according to the present invention. As shown in the figure, a steel fabric 10 for reinforcing rubber articles according to the present invention is a twill weave in which warps 1 and wefts 2 are woven.

  In the steel fabric 10 of the present invention, the warp 1 is made of a steel wire having a wire diameter of 0.15 to 0.38 mm, or a steel cord in which two or more steel wires are twisted together. If the wire diameter of the steel strand constituting the warp 1 is less than 0.15 mm, the strength is insufficient. On the other hand, if it exceeds 0.38 mm, the bending stiffness in the out-of-plane direction of the composite of rubber and steel becomes too high. It lacks flexibility and adversely affects durability.

  FIG. 2 is a cross-sectional view (a-a cross section in FIG. 1) of the steel fabric 10 when the warp 1 is made of a single steel wire, and FIG. 3 is a cross-sectional view of the warp 1 made of a 1 × 3 steel cord. Sectional drawing (aa cross section in FIG. 1) of the steel fabric 10 in the case is shown, respectively. Reference numeral 3 in the figure indicates a steel strand.

  The warp 1 may be made of a flat steel wire that satisfies W / T ≧ 2 and 0.15 mm ≦ T ≦ 0.38 mm, where W is the width and T is the thickness. . FIG. 4 shows a sectional view of the steel fabric 10 in this case (a-a section in FIG. 1). When the flat wire applied to the warp 1 does not satisfy W / T ≧ 2, that is, when W / T is less than 2, the thickness of the composite sheet is reduced while the strength is ensured to reduce the weight of the rubber article. Cannot be achieved. Further, when the thickness T is less than 0.15 mm, the strength is insufficient, while when it exceeds 0.38 mm, the bending rigidity in the out-of-plane direction of the composite sheet of rubber and cord becomes too high, and lacks flexibility. It will adversely affect durability.

  In addition, it is more preferable to bundle two or more steel strands, steel cords, and flat steel wires used for the warp yarn 1 in order to reduce the thickness of the composite sheet and reduce the weight of the rubber article. .

  Further, the weft 2 is made of a steel strand having a wire diameter of 0.08 to 0.18 mm, regardless of whether the warp 1 is the steel strand, the steel cord or the flat steel wire. If the wire diameter of the weft 2 is less than 0.08 mm, the effect of improving the rigidity is small. On the other hand, if it exceeds 0.18 mm, the contact pressure between the warp and the weft becomes large, which adversely affects the durability of the rubber article. Become.

  Moreover, as shown in FIG. 1, it is preferable that the steel fabric 10 of this invention has a clearance gap between the adjacent warp 1 and the weft 2, respectively. If there is no gap between the adjacent warp yarns 1 and weft yarns 2, when a bending input is generated in the in-plane direction in the composite sheet in the rubber article, the rigidity is too high to be flexibly deformed and durable. May adversely affect sex.

  The steel fabric 10 of the present invention may be a twill fabric composed of the warp yarn 1 and the weft yarn 2. With this, in a rubber article using the steel fabric 10 as a rubber reinforcing material, the steel fabric 10 according to the present invention is intended. An effect is obtained. There is no restriction | limiting in particular in the kind of twill, It can select and use suitably, such as 1 * 2, 1 * 3, 1 * 4. Twill weaves can be woven by skipping any number of yarns (two or more), so the curvature is milder than that of plain weaves in which warp yarns and weft yarns are alternately woven, and the manufacturing ease is excellent. In addition, when using the steel fabric 10 of this invention for reinforcement of rubber | gum, it is also possible to use it by laminating | stacking in multiple layers. Moreover, it is also possible to cut and use it diagonally with respect to the direction of weaving, and when applied to rubber products such as pneumatic tires and industrial belts, there are no restrictions on the embedding method.

Hereinafter, the present invention will be described more specifically based on examples.
(Examples and Comparative Examples)
As a twill-woven steel fabric 10 composed of warp yarns 1 and weft yarns 2 as shown in FIG. 1, reinforcing materials of each example and comparative example were manufactured according to the conditions shown in Table 1 below. The warp and weft materials are all steel. 2 to 5 are cross-sectional views taken along the line aa in FIG. FIG. 2 shows a case where the warp 1 is made of a single steel wire. FIG. 3 shows a case where the warp 1 is made of one steel cord having a 1 × 3 structure. Furthermore, FIG. 4 is a case where the warp 1 consists of one flat wire. FIG. 5 shows a case where two steel single wires are arranged in parallel in the width direction to form a warp 1 and a weft 2 is passed therethrough.

(Conventional example 1)
As shown in FIG. 7 which is a cross-sectional view taken along line bb in FIGS. 6 and 6, steel cords having a 1 × 3 structure are arranged in parallel, and according to the conditions shown in Table 1 below, A reinforcement was produced.

  The obtained reinforcing materials of Examples, Comparative Examples and Conventional Examples were embedded in rubber to produce composite sheets, and dimensional stability and rigidity were evaluated. The dimensional stability was evaluated by observing the warped thread in the composite sheet with X-rays. In addition, regarding the rigidity, when the composite sheet is bent in the in-plane direction and the out-of-plane direction with the conventional example 1 as a reference, the in-plane rigidity ratio with respect to the out-of-plane is larger than the conventional example 1 Was marked with ◯, and small when x. These results are also shown in Table 1 below.

  As shown in Table 1 above, it was confirmed that each of the steel fabrics of each example was excellent in dimensional stability when used as a composite sheet, and improved in rigidity as compared with Conventional Example 1. On the other hand, the steel woven fabric of Comparative Example 1 has an out-of-plane rigidity because the wire diameter is too thick, resulting in inferior rigidity compared to Conventional Example 1, and Conventional Example 1 has no weft. The result was inferior in dimensional stability.

It is a schematic plan view which shows the steel fabric for rubber article reinforcement of this invention. It is an expanded sectional view (aa cross section in FIG. 1) which shows the steel fabric in case a warp consists of a steel single wire. It is an expanded sectional view (aa cross section in FIG. 1) which shows the steel fabric in case a warp consists of a steel cord of 1x3 structure. It is an expanded sectional view (aa cross section in FIG. 1) which shows the steel fabric in case a warp consists of a flat wire. It is an expanded sectional view (aa cross section in FIG. 1) which shows the steel fabric in case a warp is formed by arranging two steel single wires. It is a schematic plan view which shows the reinforcing material which arranges the 1x3 structure steel cord of the prior art example 1 in parallel. It is an expanded sectional view which follows the bb line in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Warp 2 Weft 3 Steel strand 10 Steel fabric for rubber article reinforcement

Claims (6)

  A twill-woven steel fabric for reinforcing rubber articles, in which warp and weft are woven, wherein the warp is a steel strand having a wire diameter of 0.15 to 0.38 mm, or two or more steel strands. A steel fabric for reinforcing rubber articles, characterized in that the steel yarn is made of a steel cord twisted together and the weft yarn is made of a steel strand having a wire diameter of 0.08 to 0.18 mm.   A twill-woven steel fabric reinforcing steel woven fabric in which warp and weft are woven, and the warp is W / T ≧ 2 and 0.15 mm ≦ T ≦ 0, where W is the width and T is the thickness. A steel fabric for reinforcing rubber articles, characterized by comprising a flat steel wire satisfying .38 mm and the weft yarn comprising a steel strand having a wire diameter of 0.08 to 0.18 mm.   The steel fabric for reinforcing rubber articles according to claim 1, wherein the warp yarn comprises two or more steel strands or steel cords.   The steel fabric for reinforcing rubber articles according to claim 2, wherein the warp yarn comprises two or more flat steel wires.   The steel fabric for reinforcing rubber articles according to any one of claims 1 to 4, wherein there are gaps between the adjacent warps and wefts.   A rubber article comprising the steel fabric for reinforcing a rubber article according to any one of claims 1 to 5 as a rubber reinforcing material.

Images