Method for producing rubber winding liners

Abstract

To provide a rubber take-up liner having a low possibility of foreign matter being mixed into a rubber member even when a damage or the like is caused.SOLUTION: A rubber take-up liner 1 is used for take-up of an un-vulcanized rubber and contains an amorphous film 7. The amorphous film 7 is, for example, a material in which an amorphous resin is formed into a film shape. The amorphous film 7 may be a material in which an embossing processing is performed on a surface thereof. A rubber take-up liner 3 may be a material in which many other materials 5 and 9 are laminated with the amorphous film 7 as a core material.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a liner for winding rubber. [Background technology]

[0002] When winding up rubber materials, a cushioning material called a liner is used to prevent the rubber from sticking together (see Patent Document 1, etc.). The liner can be made of, for example, cloth or a laminated film. Here, a laminated film is a film made by combining multiple materials in multiple layers. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2019-026964 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the case of a cloth liner, the threads of the cloth may break, and in the case of a laminated film, the surface of the film may crack or the base material inside may peel off, which may cause problems such as foreign matter becoming mixed into the rubber component.

[0005] Figure 4 shows an example of a laminated film used in a conventional liner. Figure 4(a) shows a film made by combining multiple materials into many layers. Figures 4(b) and (c) show films made by laminating composite materials (urethane, cloth, film, etc.) onto the laminated film shown in Figure 4(a) as the core material.

[0006] FIG. 5 shows a tear experiment of the laminated film of FIG. 4(a).

[0007] Figures 5(a) and (b) show the case where the tear direction is horizontal. One of the materials that composes the laminated film has a biaxial (vertical and horizontal) or triaxial (vertical and both diagonal) structure, and is in a lattice or mesh shape. Three experiments were conducted with the cuts on the intersections of the lattice, and three experiments were conducted with the cuts between the lattice. The average tear strength (N) was 57.0N at the maximum convex point and 29.0N averaged over all the concaves and convexes.

[0008] Figure 5(c) shows the case where the tear direction was vertical. Three experiments were conducted with the cuts on the intersections of the lattice, and three experiments were conducted with the cuts between the lattice. The average tear strength (N) at the maximum convex point was 45.5N, and the average for all concaves and convexes was 27.0N.

[0009] Furthermore, the base material of the laminated film peeled off at the torn area (see Figure 5(b)). Also, the surface of the film was cracked at the torn area (see Figure 5(c)). This may cause foreign matter to get into the rubber component. 。

[0010] Therefore, an object of the present invention is to propose a rubber winding liner that is unlikely to cause foreign matter to become mixed into the rubber member even if damage or the like occurs. [Means for solving the problem]

[0011] A first aspect of the present invention is a rubber winding liner comprising an amorphous film.

[0012] A second aspect of the present invention is a rubber winding device according to the first aspect. for The liner has a single structure of the amorphous film, and the amorphous film is made of an amorphous resin formed into a film shape.

[0013] The third aspect of the present invention is the rubber winding device according to the second aspect. for The liner, the amorphous film, has a unitary structure in which an amorphous resin is formed into a film shape and the surface is embossed.

[0014] A fourth aspect of the present invention is a rubber winding device according to any one of the first to third aspects. for The liner is made of a plurality of materials with the amorphous film as a core material. Paste It is a combination of the above.

[0015] A fifth aspect of the present invention is a rubber winding device according to any one of the first to fourth aspects. for A liner used for winding unvulcanized rubber. Effect of the Invention

[0016] According to each aspect of the present invention, by using an amorphous film, even if it is damaged, it will tear gradually without cracking or peeling off, thereby reducing the possibility of foreign matter being mixed into the rubber member. [Brief description of the drawings]

[0017] [Figure 1] FIG. 1 is a diagram showing an example of the configuration of a rubber winding liner according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a diagram showing a specific example of the configuration of the rubber winding liner of FIG. 1. [Diagram 3] A tearing experiment of the amorphous film in FIG. 2(a) is shown. [Figure 4] An example of a laminated film used in a conventional liner is shown below. [Diagram 5] A tear experiment of the laminated film in FIG. 4(a) is shown. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Hereinafter, an embodiment of the present invention will be described with reference to the drawings, however, the present invention is not limited to this embodiment. EXAMPLES

[0019] FIG. 1 is a diagram showing a rubber winding device according to an embodiment of the present invention. forFIG. 1(a) and FIG. 1(b) are diagrams showing an example of a liner configuration. for The liner 1 is a film made of an amorphous material, and has a single structure of an amorphous film. Also, Figs. 1(c) and (d) show the rubber winding of Figs. 1(a) and (b). for A rubber roll made by bonding composite materials (urethane, cloth, film, etc.) to a liner as the core material. for In FIG. 1(c) and (d), the amorphous film 7 made of an amorphous material is used as the core material, and the other materials 5 and 9 are used as the core material. Paste The core material may be untreated or may be surface treated, for example by blasting or atmospheric plasma treatment.

[0020] Figure 2 shows the rubber winding in Figure 1. for 2(a) is a diagram showing a specific example of the structure of a liner according to the present invention. for An example of the liner is a film of amorphous resin, which is a single-piece structure of amorphous film. Specifically, NC-PET (registered trademark) was used. Also, Fig. 2(b) and (c) show a composite material (urethane, cloth, film, etc.) made of the amorphous film 11 of Fig. 2(a) as a core material. Paste It was created by combining

[0021] If wrinkles or scratches occur in the liner when the rubber member is wound up, the rubber member will adhere to the liner from those wrinkles or scratches, causing problems such as tearing or breaking the base material or causing foreign matter to become mixed into the rubber member.

[0022] FIG. 3 shows a tear experiment of the amorphous film of FIG. 2(a).

[0023] Figure 3(a) shows the case where the tear direction is horizontal. When an experiment was performed three times with a cut, the tear strength (N) was 84N, 55N, and 66N at the maximum convex point, averaging 68.3N, and 44N, 34N, and 40N for the total unevenness average, averaging 39.3N.

[0024] Figure 3(b) shows the case where the tear direction is vertical. When an experiment was performed three times with a cut, the tear strength (N) was 47N, 48N, and 49N at the maximum convex point, with an average of 48.0N, and 37N, 38N, and 39N for the total unevenness average, with an average of 38.0N.

[0025] The tear strength is greater in both the vertical and horizontal directions than in Figure 5, and it has the ability to be used as a liner. Note that the tear strength (N) in the diagonal direction was 37.3 N on average for the maximum convex point and 17.5 N on average for all concaves and convexes in Figure 4(a), whereas it was 102.3 N on average for the maximum convex point and 55.3 N on average for all concaves and convexes in Figure 2(a).

[0026] Furthermore, the amorphous film is flexible and suitable for the core material, and since it is amorphous, it gradually breaks at the torn portion, the torn section is smooth, and it does not peel off or crack, so that it is possible to reduce the possibility of foreign matter being mixed into the rubber member.

[0027] The amorphous film in Figure 2(a) shows at least the same performance in evaluation tests such as peelability evaluation (rubber adhesion test), water / gasoline impregnation evaluation (change in performance when impregnated with water / gasoline), and bending resistance evaluation (resistance when the sample is made into a loop and compressed). Therefore, it is not destroyed by water resistance or solvent resistance, and it is not destroyed by rubber cement used in tire manufacturing. Furthermore, when used as a core material, the adhesive strength without surface treatment is 1.42 (N / 25mm) for the ones in Figures 2(b) and (c), while it is 1.27 (N / 25mm) for the ones in Figures 4(b) and (c), and the adhesive strength can be improved. Furthermore, when the surface is treated by blasting + atmospheric plasma treatment, the adhesive strength is 3.09 (N / 25mm) for the ones in Figures 2(b) and (c), while it is 2.63 (N / 25mm) for the ones in Figures 4(b) and (c), and the adhesive strength can be greatly improved. [Explanation of symbols]

[0028] 1,3 Rubber winding forLiners, 5, 9 Other materials, 7, 11 Amorphous films

Claims

[Claim 1] A method for producing a rubber winding liner, comprising the steps of: The method for producing the rubber winding liner comprises laminating another material to an amorphous film formed by forming an amorphous material into a film shape, which is used as a core material.

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