Non-slip material and article with non-slip function

Abstract

To provide a non-slip material whose end portion is hard to be peeled off in a state of being stuck to the surface of an article and which can give an excellent non-slip effect to various slip resistant objects, and to provide an article with a non-slip function.SOLUTION: A non-slip material 14 comprises a grip layer 16 having a Shore A hardness of 25-55, a shape-retaining layer 18 having a Shore A hardness higher than that of the grip layer 16, and an adhesion layer 20. The shape-retaining layer 18 and an inner grip part 16a are overlapped on and bonded to the upper surface of an inner adhesion part 20a in this order, and an outer grip part 16b(1) is overlapped on and bonded to the upper surface of an outer adhesion part 20b(1). The upper surface of the shape-retaining layer 18 gently bulges toward a direction of the inner grip part 16a, and the upper surface of the inner grip part 16a bulges substantially parallel to the upper surface of the shape-retaining layer 18. The upper surface of the outer grip part 16b(1) is gently continuous with the upper surface of the inner grip part 16a to intersect the lower surface of the outer grip part 16b(1). The lower surface of the inner adhesion part 20a and the lower surface of the outer adhesion part 20b (1) are flush with each other.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to an anti-slip material that is attached to the surface of an article, and to an article with an anti-slip function to which this anti-slip material is attached. [Background technology]

[0002] Conventionally, there has been clothing (such as work clothes suitable for carrying luggage) with a non-slip piece having a convex cross section attached to the surface of the fabric, as disclosed in, for example, Patent Document 1. The non-slip piece shown in Fig. 10 of Patent Document 1 has a surface layer that comes into contact with the surface of the luggage formed from silicone ink, rubber-based ink, or the like, and an elastic core material made of hard or soft polyurethane foam or the like is disposed beneath the surface layer, and a heat-sensitive adhesive layer made of a hot melt adhesive sheet is disposed beneath the elastic core material.

[0003] In the finished state of the anti-slip piece formed by the mold, the elastic core is formed into a dome shape bulging upward, and the upper surface of the elastic core is covered with a thin surface layer. The border of the surface layer is disposed outward beyond the peripheral edge of the elastic core, the flat lower surface of the elastic member is flush with the lower surface of the border, and a flat heat-sensitive adhesive layer overlaps the lower surface of the elastic member and the lower surface of the border. The heat-sensitive adhesive layer of the anti-slip piece is then fused to the fabric of the garment to form a garment with an anti-slip function.

[0004] Also, as disclosed in Patent Document 2, there is a multi-layered anti-slip sheet for use around water that is attached to the floor of a bathroom or washroom. The anti-slip sheet for use around water described in claim 1 of Patent Document 2 has a resin film with an upper surface having a predetermined roughness as the outermost layer that comes into contact with the soles of the feet, a first reinforcing film harder than the resin film is provided below the resin film, and an adhesive layer is provided below the first reinforcing film. The resin film of the outermost layer is made of a material with a Shore A hardness of 60 to 82 so that it feels soft and smooth when touched by the soles of the feet, and gentle on the skin with little irritation. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2013-234403 A [Patent Document 2] JP 2015-30106 A Summary of the Invention [Problem to be solved by the invention]

[0006] The clothing of Patent Document 1 has a problem that the end of the anti-slip piece is easily peeled off from the fabric. In this clothing, the anti-slip material is attached to the fabric via a heat-sensitive adhesive, and a step is formed at the boundary between the end of the anti-slip material and the fabric. To explain in detail, as shown in FIG. 9, the end of the anti-slip material 1 is overlapped by the border 3a of the surface layer 3 on the heat-sensitive adhesive 2, and a step-like step is formed at the boundary between the border 3a and the fabric 4. Therefore, when a strong external force F is applied to the end surface 3b of the border 3a, a shear force or peel force greater than expected acts on the joint between the border 3a and the fabric 4, and the border 3a may peel off.

[0007] The anti-slip sheet for use around water in Patent Document 2 does not give careful consideration to the peeling off of the edges when it is attached to a floor, etc. Therefore, even if the technology in Patent Document 2 is applied to the clothing in Patent Document 1, the above problem (the problem that the edges of the anti-slip pieces are easily peeled off) will not be solved.

[0008] The present invention has been made in consideration of the above-mentioned background technology, and aims to provide an anti-slip material and an article with anti-slip function, which are unlikely to peel off at the ends when attached to the surface of an article and which provide excellent anti-slip effect on a variety of objects to be anti-slip. [Means for solving the problem]

[0009] The present invention provides an anti-slip material that is attached to the surface of an article, The grip layer is made of an elastomer having a Shore A hardness in the range of 25 to 55, a shape-retaining layer is made of an elastomer having a Shore A hardness higher than that of the grip layer, and an adhesive layer is made of an elastomer for adhesion, The grip layer has an inner grip portion having a size sufficient to cover an upper surface of the shape-retaining layer, and outer grip portions continuous with both sides of the inner grip portion, The adhesive layer has an inner adhesive portion having a size sufficient to cover the lower surface of the shape-retaining layer, and outer adhesive portions continuous with both sides of the inner adhesive portion, The shape-retaining layer and the inner grip portion are overlapped and bonded to each other on an upper surface of the inner adhesive portion, and the outer grip portion is overlapped and bonded to each other on an upper surface of the outer adhesive portion, an upper surface of the shape-retaining layer gently bulges toward the inner grip portion, an upper surface of the inner grip portion bulges approximately parallel to the upper surface of the shape-retaining layer, an upper surface of the outer grip portion smoothly continues to the upper surface of the inner grip portion and intersects with the lower surface of the outer grip portion, and a lower surface of the inner adhesive portion and a lower surface of the outer adhesive portion are flush with each other, The anti-slip material is attached to the surface of the article via the adhesive layer, and the upper surface of the grip layer is used as an anti-slip surface.

[0010] The thickness of the inner grip portion is in the range of 200 to 400 μm. The elastomer of the grip layer is preferably a polyurethane resin, an acrylic resin, a polyolefin resin, a polyamide resin, a polyester resin, a polyether resin, a natural rubber, or a synthetic rubber such as a silicone rubber, a styrene butadiene rubber, or a butadiene rubber. The elastomer of the grip layer and the shape-retaining layer is preferably a polyurethane resin. The boundary between the inner adhesive portion and the shape-retaining layer may be configured to gently bulge in the direction of the shape-retaining layer.

[0011] The present invention also provides an article with an anti-slip function, in which the above-mentioned anti-slip material is attached to a surface of an article body via the adhesive layer. The article body is, for example, an article of clothing. Effect of the Invention

[0012] The anti-slip material of the present invention provides an excellent anti-slip effect on various anti-slip objects. For example, when the surface of the anti-slip object has a predetermined roughness, the surface of the grip layer fits well to the surface of the anti-slip object, increasing the contact area and providing a higher grip performance than conventional methods.

[0013] The article with anti-slip function of the present invention can be easily manufactured by welding the adhesive layer of the anti-slip material to the surface of the article body. In addition, the anti-slip material has a unique structure that makes it difficult for the ends to peel off when attached to the surface of the article body, so it does not easily peel off even when the object to be anti-slip is strongly contacted or rubbed, or when the article body is handled a little roughly. Therefore, the article with anti-slip function of the present invention is very suitable for use as clothing such as sportswear and work clothes, and can also be used for purposes other than clothing. [Brief description of the drawings]

[0014] [Figure 1] 1 is a perspective view showing one embodiment of an anti-slip material and an article with anti-slip function of the present invention. [Diagram 2] (a) is an enlarged plan view of one of the anti-slip materials in Figure 1, (b) is a cross-sectional view taken along line AA showing the internal structure of the anti-slip material and its surrounding area, and (c) is a diagram showing the three layers of the anti-slip material separated. [Diagram 3] 1 is a table showing the dimensions and materials of each part of a prototype produced for testing the anti-slip effect of the anti-slip material of this embodiment. [Figure 4] FIG. 1 is a table showing two comparative examples prepared for testing the anti-slip effect, with FIG. 1(a) showing the materials, etc. of the first comparative example, and FIG. 1(b) showing the dimensions, materials, etc. of each part of the second comparative example. [Diagram 5] These are surface photographs of three anti-slip objects prepared for testing the anti-slip effect: (a) surface photograph of a rugby ball α, (b) surface photograph of a rugby ball β, and (c) surface photograph of the fabric of a motorcycle seat. [Figure 6] 1 is a graph showing test results of the anti-slip effect of a prototype and first and second comparative examples, in which graph (a) shows measurement data of frictional resistance when the anti-slip object is a rugby ball α, and graph (b) shows measurement data of frictional resistance when the anti-slip object is a rugby ball β. [Figure 7] 1 is a graph showing test results of the anti-slip effect of the prototype and the first and second comparative examples, and showing measurement data of friction resistance when the anti-slip object is the fabric of a motorcycle seat. [Figure 8] 13A to 13D are plan views showing modified examples (modified external shapes) of the anti-slip material of this embodiment. [Figure 9] 1 is a vertical cross-sectional view showing the internal structure of the end portion of an anti-slip piece and its surrounding area of ​​a conventional garment disclosed in Patent Document 1. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] An embodiment of the anti-slip material and article with anti-slip function of the present invention will be described below with reference to Figs. 1 to 7. The article with anti-slip function of this embodiment is a rugby jacket 10, and as shown in Fig. 1, a plurality of anti-slip materials 14 of this embodiment are attached to the surface of fabric 12, which is the main body of the article. Each anti-slip material 14 is formed into a long and narrow strip-like shape in a plan view. In the case of the jacket 10 and the anti-slip material 14, the object to be prevented from slipping is a rugby ball. Rugby wear is required to grip the rugby ball firmly around the chest area so that the ball is unlikely to drop even when the wearer performs vigorous movements when the rugby ball is held under one arm. Therefore, in this jacket 10, multiple anti-slip materials 14 are attached to the surface of the fabric 12 around the chest area on both sides. The external shape and layout of the anti-slip materials 14 were determined after repeated consideration based on the opinions of rugby players and related parties, and each anti-slip material 14 has an elongated strip-like external shape, and is laid out so that each anti-slip material 14 is arranged horizontally with a certain distance between them in the vertical direction.

[0016] As shown in Figs. 2(b) and (c), the inside of the anti-slip material 14 has a multi-layer structure in which a grip layer 16, a shape-retaining layer 18 and an adhesive layer 20 are stacked and integrated.

[0017] First, the materials of each layer will be described. The grip layer 16 is made of an elastomer having a Shore A hardness in the range of 25 to 55. For example, synthetic resins such as polyurethane resins, polyolefin resins, polyamide resins, polyester resins, and polyether resins, or synthetic rubbers such as natural rubber, silicone rubber, styrene butadiene rubber, and butadiene rubber, are preferably used as the elastomer, and it is more preferable to use polyurethane resins that are inexpensive and easily available. As an example of polyurethane resin, it is more preferable to use a two-liquid mixed polyurethane resin obtained by mixing an aliphatic or alicyclic compound polyisocyanate with a polyester polyol, and further adding 0.01 to 2.0% of a hindered amine light stabilizer, 0.01 to 2.0% of a phenolic antioxidant, a phosphorus antioxidant, or a blend thereof, and 0.01 to 2.0% of a benzotriazole, benzophenone, or triazine ultraviolet absorber. By using this two-component mixed polyurethane resin, it is possible to obtain a grip layer 16 that is resistant to ultraviolet rays and has excellent abrasion resistance and mechanical strength, and it is possible to improve the bonding strength between the grip layer 16 and the adhesive layer 20 described later.

[0018] The shape-retaining layer 18 is made of an elastomer having a Shore A hardness higher than that of the grip layer 16, and is preferably made of, for example, a polyurethane-based resin which is inexpensive and easily available. The adhesive layer 20 is made of an elastomer for adhesion, and is preferably made of, for example, a thermoplastic polyurethane-based adhesive which is commonly used in the field of clothing.

[0019] Next, the structure of each layer will be described. The grip layer 16 has an inner grip portion 16a large enough to cover the upper surface of the shape-retaining layer 18, and outer grip portions 16b(1), 16b(2) continuous with both sides of the inner grip portion 16a. The adhesive layer 20 has an inner adhesive portion 20a large enough to cover the lower surface of the shape-retaining layer 18, and outer adhesive portions 20b(1), 20b(2) continuous with both sides of the inner adhesive portion 20a.

[0020] The three layers are joined to each other in the following order: shape-retaining layer 18 and inner grip portion 16a are overlapped and bonded to each other on the upper surface of inner adhesive portion 20a, outer grip portion 16b(1) is overlapped and bonded to each other on the upper surface of outer adhesive portion 20a(1), and outer grip portion 16b(2) is overlapped and bonded to each other on the upper surface of outer adhesive portion 20a(2).

[0021] The upper surface of the shape-retaining layer 18 gently bulges toward the inner grip portion 16a, and the upper surface of the inner grip portion 16a bulges approximately parallel to the upper surface of the shape-retaining layer 18. The upper surface of the outer grip portion 16a(1) smoothly continues to the upper surface of the inner grip portion 16a and intersects with the lower surface of the outer grip portion 16a(1). Similarly, the upper surface of the outer grip portion 16a(2) smoothly continues to the upper surface of the inner grip portion 16a and intersects with the lower surface of the outer grip portion 16a(2). The lower surface of the inner adhesive portion 20a and the lower surfaces of the outer adhesive portions 20b(1) and 20b(2) are flush with each other, and the boundary between the inner adhesive portion 20a and the shape-retaining layer 18 gently bulges toward the shape-retaining layer 18.

[0022] The jacket 10 is formed by adhering a plurality of anti-slip materials 14 to the surface of the fabric 12 via an adhesive layer 20, with the upper surface of each grip layer 16 being used as the anti-slip surface.

[0023] To briefly explain the function of the anti-slip material 14, when an object to be prevented from slipping comes into contact with the surface of the anti-slip material 14, the grip layer 16 sinks in appropriately to fit the surface of the object to be prevented from slipping, and the shape-retaining layer 16 supports the grip layer 16 so that the lower surface of the grip layer 16 maintains approximately its original shape, and exerts a predetermined resistance on the object to be prevented from slipping. As a result, strong frictional resistance is generated between the grip layer 16 and the object to be prevented from slipping, allowing the object to be firmly gripped.

[0024] Furthermore, when the anti-slip material 14 is attached to the surface of the fabric 12, no sharp step as shown in Fig. 9 is generated at the boundary between the outer grip portions 16b(1), 16b(2) of the anti-slip material 14 and the fabric 12. Therefore, even if a strong external force F is applied to this boundary, it is difficult for a large shear force or peel force to act on the joint between the outer grip portions 16b(1), 16b(2) and the fabric 12, and therefore the material does not easily peel off.

[0025] Next, we will explain the tests conducted to confirm the anti-slip effect of the anti-slip material 14 and the results thereof. For this test, a member in which the anti-slip material 14 was attached to the fabric 12 (hereinafter referred to as prototype 10S) and two members for comparison (hereinafter referred to as first and second comparative examples 22, 24) were prepared, and the frictional resistance of each against the anti-slip object was measured.

[0026] Prototype 10S is a product in which a plurality of anti-slip materials 14 shown in FIG. 3 are aligned and attached to the surface of fabric 12. The cross-sectional size of anti-slip material 14 is approximately 3 mm in width and approximately 0.67 mm in height. Grip layer 16 is made of polyurethane resin with Shore A hardness of 50 and is approximately 270 μm in thickness. Shape-retaining layer 18 is made of polyurethane resin with Shore A hardness higher than 50 and is approximately 200 μm in thickness. Adhesive layer 20 is made of thermoplastic polyurethane adhesive, and the thickness of inner adhesive portion 20a is approximately 200 μm. Fabric 12 is a knitted fabric made of polyester fiber.

[0027] 4(a), the first comparative example 22 is a fabric 12 to which no anti-slip material is attached. The fabric 12 is similar to the fabric 12 of the prototype 10S.

[0028] In the second comparative example 24, a plurality of existing anti-slip materials 26 shown in FIG. 4(b) are arranged on the surface of the same fabric 12 as the prototype 10S. The anti-slip material 26 has a single-layer structure consisting of only a grip layer 28 (no shape-retaining layer or adhesive layer), and the cross-sectional size is approximately 3 mm in width and approximately 400 μm in height. The grip layer 28 is formed by applying a liquid silicone rubber material to the fabric 12 and drying it, and is firmly fixed to the surface of the fabric 12. The silicone rubber has a Shore A hardness of 70 in the finished state.

[0029] The anti-slip objects prepared were rugby balls α and β made of synthetic leather. Rugby ball α has a large number of dome-shaped convex parts (approximately 100 μm high) surrounded by gently curved surfaces formed at a high density on its surface, as shown in Figure 5(a). Rugby ball β is a new ball, and has a large number of X-shaped convex parts (approximately 200 μm high) surrounded by slightly steep slopes formed at a relatively low density on its surface, as shown in Figure 5(b).

[0030] 6(a) and (b) are graphs showing measurement data of the frictional resistance of the first and second comparative examples 22 and 24 and the prototype 10S against the rugby balls α and β. The frictional resistance is a value measured when the rugby balls α and β are pressed against the surface of the fabric with a constant force in a direction perpendicular to the fabric surface.

[0031] In the case where the anti-slip object is a rugby ball α, as shown in FIG. 6(a), if the value of the frictional resistance of the first comparative example 22 [without anti-slip material] is taken as the initial value (reference value), in a dry environment, the frictional resistance of the second comparative example 24 [existing anti-slip material 28] increases to a certain degree, and the frictional resistance of the prototype 10S [anti-slip material 14] increases significantly. In addition, in a wet environment, the frictional resistance of the second comparative example 24 [existing anti-slip material 28] hardly changes, and the frictional resistance of the prototype 10S [anti-slip material 14] increases to a certain degree. In other words, in the case where the anti-slip object is a rugby ball α, it was confirmed that the anti-slip material 14 provides a better anti-slip effect than the existing anti-slip material 28 in both dry and wet environments.

[0032] In the case where the anti-slip object is a rugby ball β, as shown in the graph of FIG. 6(b), if the value of the frictional resistance of the first comparative example 22 [without anti-slip material] is taken as the initial value (reference value), in a dry environment, the frictional resistance of the second comparative example 24 [existing anti-slip material 28] is reduced to a certain degree, and the frictional resistance of the prototype 10S [anti-slip material 14] is increased to a certain degree. Similarly, in a wet environment, the frictional resistance of the second comparative example 24 [existing anti-slip material 28] is reduced to a certain degree, and the frictional resistance of the prototype 10S is increased to a certain degree. In other words, in the case where the anti-slip object is a rugby ball β, attaching the existing anti-slip material 28 has the opposite effect (becoming more slippery), and it was confirmed that the anti-slip material 14 provides an excellent anti-slip effect in both dry and wet environments.

[0033] The main factors that make anti-slip material 14 superior to existing anti-slip material 28 are that grip layer 16 of anti-slip material 14 is appropriately soft (Shore A hardness is approximately 50) and that the thickness of soft grip layer 16 is appropriately thick (approximately 300 μm), which is thought to enable the surface of grip layer 16 to fit well with the uneven surfaces of rugby balls α and β.

[0034] In addition, for the anti-slip material 14, similar tests were conducted on prototypes in which the Shore A hardness of the grip layer 16 was varied in the range of 25 to 55, and on prototypes in which the thickness of the grip layer 16 was varied in the range of 200 to 400 μm, and it was confirmed that equivalent anti-slip effects were obtained.

[0035] As described above, the anti-slip material 14 of this embodiment provides an excellent anti-slip effect on the object to be anti-slipped. In particular, since the surface of a rugby ball is formed with a predetermined roughness, the surface of the grip layer 16 fits well to the surface of the rugby ball, increasing the contact area and providing a higher grip performance than conventional materials.

[0036] Moreover, the jacket 10 of this embodiment can be easily manufactured by welding the adhesive layer 20 of the anti-slip material 14 to the surface of the fabric 12. Furthermore, the anti-slip material 14 has a unique structure that makes it difficult for the ends to peel off when attached to the surface of the fabric 12, so it does not easily peel off even when a rugby ball makes strong contact or rubs against it, or when the fabric 12 is handled roughly, making it very suitable for use as rugby wear.

[0037] The anti-slip material and the article with anti-slip function of the present invention are not limited to the above embodiment. For example, the above-mentioned anti-slip material 14 is suitable for use in rugby wear, but can also be used for purposes other than rugby wear.

[0038] The inventors conducted tests to confirm the anti-slip effect of the above-mentioned prototype 10 and comparative examples 22 and 24 on objects other than rugby balls α and β. The prepared anti-slip object was a synthetic leather motorcycle seat fabric, and as shown in Fig. 5(c), the surface of the fabric had a large number of L-shaped convex parts (height about 400 μm) surrounded by a slightly steep slope formed at a high density.

[0039] In the case of the fabric of a motorcycle seat, as shown in FIG. 7, the frictional resistance was measured in the same manner as the frictional resistance for the rugby balls α and β. If the value of the frictional resistance of the first comparative example 22 [without anti-slip material] is taken as the initial value (reference value), in a dry environment, the frictional resistance of the second comparative example 24 [existing anti-slip material 28] increased stepwise, and the frictional resistance of the prototype 10S [anti-slip material 14] increased even more. Similarly, in a wet environment, the frictional resistance of the second comparative example 24 [existing anti-slip material 28] increased stepwise, and the frictional resistance of the prototype 10S [anti-slip material 14] increased even more. In other words, even when the anti-slip object is the fabric of a motorcycle seat, it was confirmed that the anti-slip material 14 has a better anti-slip effect than the existing anti-slip material 28 in both dry and wet environments. Therefore, it can be said that the anti-slip material 14 is also suitable for use in motorcycle jackets.

[0040] In addition, the anti-slip material of the present invention has the characteristics that the ends are not easily peeled off when attached to the surface of an article, and that the anti-slip effect can be obtained in both dry and wet environments, so various applications are conceivable other than clothing items such as clothes and gloves. For example, the anti-slip material is suitable for applications such as attaching the anti-slip material to the back surface or belt of a backpack bag body to prevent it from slipping off the user's body (or clothes), and attaching the anti-slip material to bathroom shelves or kitchen worktops to prevent cups, dishes, etc. from slipping when placed on them.

[0041] The planar outer shape of the anti-slip material of the present invention can be freely changed according to the application. In the case of the above-mentioned anti-slip material 14, the planar outer shape is a straight, elongated strip shape in order to optimize it as an anti-slip material for rugby wear, but when used for another application, it may be a curved (or bent) strip shape as in the anti-slip material 30(1) of FIG. 8(a), or an endless ring shape as in the anti-slip material 30(2) of FIG. 8(b). In addition, it may be a shape that represents letters as in the anti-slip material 30(3) of FIG. 8(c), or an approximately rectangular (or polygonal) shape with an aspect ratio close to 1 as in the anti-slip material 30(4) of FIG. 8(d).

[0042] The manufacturing method of the anti-slip material of the present invention is not particularly limited. Incidentally, in the prototype of the above-mentioned anti-slip material 14, a method was used in which a plurality of independent elastomers were stacked and integrally bonded by high-frequency welder processing. At this time, if the finished state of the anti-slip material 14 is manufactured so that the boundary between the inner adhesive portion 20a and the shape-retaining layer 18 is gently bulged toward the shape-retaining layer 18, the bonding strength between the shape-retaining material 18 and the adhesive layer 20 can be improved. Therefore, in FIG. 2(b) and the like, the inner adhesive portion 20a of the anti-slip material 14 is thicker than the outer adhesive portions 20b(1), 20(b). However, if a predetermined bonding strength can be obtained without bulging the boundary between the inner adhesive portion 20a and the shape-retaining layer 18, or if it is manufactured by a different manufacturing method, it is considered that the entire adhesive layer 20 can be made to have a uniform thickness. [Explanation of symbols]

[0043] 10,10S Rugby wear jacket (with anti-slip function) 12 Fabric (item body) 14,30(1)~30(4) Anti-slip material 16 Grip Layer 16a Inner grip part 16b(1), 16(2) Outer grip part 18 Shape-retaining layer 20 Adhesive layer 20a Inner adhesive part 20b(1),20b(2) Outside adhesive part

Claims

1. An anti-slip material that is attached to the surface of an article, The gripping layer is made of an elastomer having a Shore A hardness in the range of 25 to 55, the shape-retaining layer is made of an elastomer having a Shore A hardness higher than that of the gripping layer, and the adhesive layer is made of an elastomer for adhesion, The grip layer has an inner grip portion having a size sufficient to cover an upper surface of the shape-retaining layer, and outer grip portions continuous with both sides of the inner grip portion, The adhesive layer has an inner adhesive portion having a size sufficient to cover the lower surface of the shape-retaining layer, and outer adhesive portions continuous with both sides of the inner adhesive portion, The shape-retaining layer and the inner grip portion are overlapped and bonded to each other on an upper surface of the inner adhesive portion, and the outer grip portion is overlapped and bonded to each other on an upper surface of the outer adhesive portion, an upper surface of the shape-retaining layer gently bulges toward the inner grip portion, an upper surface of the inner grip portion bulges approximately parallel to the upper surface of the shape-retaining layer, an upper surface of the outer grip portion smoothly continues to the upper surface of the inner grip portion and intersects with the lower surface of the outer grip portion, and a lower surface of the inner adhesive portion and a lower surface of the outer adhesive portion are flush with each other, An anti-slip material which is attached to the surface of the article via the adhesive layer, and the upper surface of the grip layer is used as an anti-slip surface.

2. 2. The anti-slip material according to claim 1, wherein the thickness of the inner gripping portion is in the range of 200 to 400 μm.

3. 2. The anti-slip material according to claim 1, wherein the elastomer of the grip layer is a polyurethane resin, an acrylic resin, a polyolefin resin, a polyamide resin, a polyester resin, a polyether resin, a natural rubber, or a synthetic rubber.

4. 2. The anti-slip material according to claim 1, wherein the elastomer of said grip layer and said shape-retaining layer is a polyurethane resin.

5. 2. The anti-slip material according to claim 1, wherein the boundary between the inner adhesive portion and the shape-retaining layer gently bulges in the direction of the shape-retaining layer.

6. 6. An article with an anti-slip function, comprising the anti-slip material according to claim 1 attached to the surface of the article body via the adhesive layer.

7. 7. The article with anti-slip function according to claim 6, wherein the article body is an article of clothing.

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