JPH0618737B2 - Manufacturing method of anti-slip rubber sheet with mosaic pattern - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a method for producing an anti-slip rubber sheet having a mosaic pattern, and in particular, it has anti-slip properties in all directions, and is not easily scratched even when it comes into contact with thyme, Moreover, the present invention relates to a method for producing an anti-slip rubber sheet having a mosaic pattern having an excellent appearance.

<Prior Art> A method for producing a rubber product having a mosaic pattern in appearance is disclosed in, for example, Japanese Utility Model Publication No. 34-18648.

The above-mentioned publication relates to the sole of footwear, and is formed by randomly mixing various kinds of natural rubber, synthetic rubber, or synthetic resin, which are colored appropriately, into amorphous shapes, that is, pressurizing / heating with a sheet molding mold. A method of obtaining a footwear sole by vulcanizing the whole and forming a variety of sheets having a variety of colors such as wood grain, cloud shape and other amorphous shapes, streamlines, etc., and making them into footwear sole shapes is disclosed. is doing.

<Problems to be Solved by the Invention> According to the publication, although a footwear sole having a mosaic pattern having an excellent appearance is certainly obtained, when the use is diversified as in the present, for example, a floor surface in a gymnasium. However, it has the drawback that it is dangerous to slip or fall because it does not have anti-slip properties on the bottom of footwear used on the ice surface in cold regions.

In view of such circumstances, the present invention has a mosaic pattern on the surface, and further aims to produce a rubber sheet that does not slip even on the floor in a gymnasium or on an ice surface in cold regions. To do.

<Means for Solving the Problems> The problems are an appropriately colored rubber kneaded product containing organic or inorganic short fibers and an appropriately colored rubber kneaded product not containing the short fibers, respectively. Rolled to a suitable thickness in a separate step, crushed each of the rolled products into pellets, mixing both crushed products in an appropriate ratio, and then filling in mold cavity, heating and pressing to vulcanize the whole A non-slip rubber sheet having a mosaic pattern is manufactured by peeling the surface.

As the short fiber contained in one of the rubber kneaded materials, for example, glass fiber, metal fiber, ceramic fiber, aromatic amide fiber, whisker fiber and the like are used.

These fibers have a length of 5 mm or less at the longest, and generally 3 mm or less so that they can be easily mixed with natural rubber or synthetic rubber. If necessary, the surface is treated to improve the adhesion with the rubber. . The tensile modulus of the fiber is preferably 10 ² to 10 ⁴ kg for glass fiber, aromatic amide fiber, metal fiber, etc.
f / mm ^{2 and} 10 ⁵ kgf / mm ² are used for whiskers. Generally, fibers that belong to a material with high elastic modulus are used, so there is a risk of scratching the contacted object, and the diameter of the fiber is 0.1 mm or less. Is preferred.

Each of the short fibers as described above has a slip resistance on ice or the like, and the diameter of the fiber is not too large in order to prevent slipping while exhibiting the slip resistance to other contacted objects, and ,
The preferable range is limited based on the finding that it is desirable to bend to a certain extent so as not to bend.

Each rubber kneaded product, i.e., an appropriately colored rubber kneaded product containing organic or inorganic short fibers and an appropriately colored rubber kneaded product not containing the short fibers are rolled into appropriate thicknesses by separate steps. However, in order to secure the rolled product in the form of pellets, it is not preferable that the tackiness is too large, and it is preferable that the product has non-blocking properties and is easily cut by a blade.

Therefore, synthetic rubbers such as styrene-butadiene copolymer rubbers and polybutadiene rubbers are preferable to natural rubbers, and in the case of a blended rubber of both, it is preferable that the ratio of the synthetic rubber is large.

Further, each of the short fibers also acts to reduce the tackiness and increase the non-blocking property when the mixing ratio increases.

<Working> The pelletized crushed materials are randomly stirred and mixed, and heating and pressurization in the mold cavity are also performed in a very natural state. A pattern appears, and by peeling off the surface of the vulcanized product in the sea or island, the mixed fibers appear on the surface, and the slip resistance is surely given in combination with the physical properties of each fiber. .

<Example> [Compound A] Natural rubber 50 parts by weight Styrene-butadiene copolymer rubber 50 〃 Vulcanization accelerator M 0.5 〃 Vulcanization accelerator D 0.2 〃 Sulfur yellow 3 〃 Zinc carbonate 4 〃 Stearic acid 1 〃 Wax 1 〃 White Carbon 30 〃 Diethylene glycol 1.5 〃 Chroman resin 10 〃 Glass fiber ^* 40 〃 Blue pigment 0.5 〃 *: Nippon Electric Glass Co., Ltd. fiber diameter 13 μm, strand length 3.0 mm Ignition loss 0.70 [Compound B] Styrene Butadiene copolymer rubber 100 parts by weight Vulcanization accelerator M 0.5 〃 Vulcanization accelerator DM 1 〃 Vulcanization accelerator TS 0.1 〃 Sulfur yellow 3 〃 Zinc white 5 〃 Stearic acid 1 〃 Wax 4 〃 White carbon ● Carbon 20 〃 Carbonate Calcium 40 〃 Diethylene glycol 1.5 〃 White pigment 3 〃 Compound A and Compound B are kneaded with a roll machine and left to stand at room temperature for one day for aging. The former is 1350 x 2
60mm, thickness 4mm, the latter is rolled by a calender machine so that the width is 1350 x 260mm and the thickness is 2mm. This rolled sheet was cut by a pelletizer to have a thickness of about 4 mm and a pellet-like crushed material was obtained. Weigh this so that the weight ratio becomes the former 2 and the latter 1, stir it sufficiently, put it in the mold cavity, and heat and pressurize (temperature 125
℃, gauge pressure 2.5 kg / cm ² , 6 minutes), area 295 × 395
A vulcanized product with a thickness of 18 mm and a thickness of 18 mm was obtained, and the surface was peeled off so that the glass fiber was exposed.

As a control example, a mixture obtained by removing glass fibers from the above-mentioned formulation A was used as the formulation A ′, and the formulation B was used as it was. Then, a sample was obtained by the same method as the above-mentioned production method, and each physical property was measured.

<Effects> It was possible to obtain a rubber sheet having a mosaic pattern, having slip resistance in all directions even on ice, and not scratching the smooth surface by a simple manufacturing method.

If this rubber sheet is used, for example, on a part of the foot contacting part of the bottom of the footwear, the heel part, etc., the anti-slip property can be greatly improved and at the same time, the footwear can be given a fashionable property to enhance the commercial value. did it.

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Claims (1)

[Claims] 1. An appropriately colored rubber kneaded product containing organic or inorganic short fibers and an appropriately colored rubber kneaded product not containing the short fibers are rolled into respective appropriate thicknesses in separate steps. Characterized in that the rolled material is each crushed into pellets, both crushed materials are mixed in an appropriate ratio, then filled in a mold cavity, heated and pressed to vulcanize the whole, and then the surface is peeled off. Manufacturing method of anti-slip rubber sheet having mosaic pattern.