JP2589642B2 - Molding method of anti-slip sole - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming an anti-slip sole.

[0002]

2. Description of the Related Art Conventionally, according to Japanese Utility Model Application Laid-open No. Sho 62-21904, glass fibers are mixed with unvulcanized rubber, and the resulting mixture is rolled. A shoe sole has been proposed in which a non-slip piece cut in a direction perpendicular to the rolling direction is embedded in a contact surface of a shoe sole so that a cut surface becomes a contact surface. Since the glass fibers interposed in the anti-slip piece in this shoe sole are arranged at right angles to the ground contact surface, a shoe sole with excellent slip resistance can be obtained, but the molding of the anti-slip piece is complicated and the anti-slip piece is used. There is a drawback that the cost has to be increased by embedding molding in the shoe sole.

[0003] In addition, a glass fiber module interposed in the sole of the shoe.
Since the hardness is very hard, such as 7 to 8, the floor surface of tiles, marble, granite and the like is easily damaged and slipped on a wet floor surface.

Conventionally, an unvulcanized rubber material mixed with a hard fiber such as glass fiber is set in a shoe sole forming die having a large number of independent protrusion forming recesses on the bottom surface, and this is heated and pressed. A method of forming a sole having a protrusion integrated with the sole by press-fitting a part of the material into the protrusion-formed recess is generally known, but a part of the unvulcanized rubber material is pressed into the protrusion-formed recess. When filling, the unvulcanized rubber material without the escape space and the air filled in the concave portion become turbulent in the concave portion, the flow direction is not determined, and the unvulcanized rubber material is filled in the concave portion, so the concave portion The hard fibers in the unvulcanized rubber dough filled in are irregularly scattered in a state in which the direction is not determined, so in the shoe sole having the protrusion thus formed, The slip resistance of the shoe sole by the dispersed hard fibers is It was not able throat expected.

[0005]

SUMMARY OF THE INVENTION The present invention provides a shoe sole which does not damage the floor surface at room temperature and has excellent slip resistance and durability under a freezing point such as an icy surface or a frozen surface. What you want to do.

[0006]

The present invention will be described below with reference to the accompanying drawings.
Acrylic fiber 12.1 mm thick and 1 to 30 denier thick
2 ... is mixed with 5 to 25 parts by weight with respect to 100 parts by weight of rubber, and the hardness after vulcanization according to JIS K6301 is 45 to 65.
Unvulcanized rubber fabric 1 for thin grounding bottom molding set at a suitable temperature
And the hardness according to JIS K6301 after vulcanization is 75 to 95.
The thick non-vulcanized rubber material 2 for forming the upper sole is set on the sole 3 and set in the shoe sole forming die 3, which is heated and pressurized by a conventional method to apply the ground sole 1 and the upper sole 2 to each other. After baking, the surface of the grounding bottom 1 is buffed and the acrylic fiber 1
It is an object of the present invention to provide a method of forming an anti-slip shoe sole characterized by exposing 2.12.

[0007] In the present invention, the unvulcanized rubber material 1 for forming the ground bottom is made of natural rubber, isoprene rubber, butadiene rubber, styrene butadiene rubber, high styrene rubber, acrylonitrile rubber, chloroprene rubber, ethylene propylene rubber, chlorinated polyethylene. And a mixture of two or more chlorosulfonated polyethylenes as main components, to which acrylic fibers are added.

In the present invention, the acrylic fibers 12.12 to be mixed with the unvulcanized rubber material 1 'for forming the ground bottom are acrylonitrile homopolymer, acrylonitrile and vinyl acetate copolymer, and acrylonitrile and vinyl chloride copolymer. Fibers formed by coalescence are used. These acrylic fibers 12.12... Have low rigidity and flexibility at room temperature as low as natural fibers, and have high rigidity at the freezing point like glass fibers. This often indicates that the temperature dependency of the elongation load of the acrylic fiber is large.
The acrylic fiber requires a load of 1.6 g / d at room temperature of 20 ° C. to pull 3% of 1-denier fiber, for example, but requires a load of 2.2 g / d at 0 ° C. If these acrylic fibers are surface-treated with a titanium-based coupling agent, a silane-based coupling agent, a fatty acid, a fatty acid metal salt, a fatty acid ester, or the like, the adhesion and dispersion of the rubber and the acrylic fibers in the grounding bottom 1 Performance can be improved.

In the present invention, the length of the acrylic fiber is limited to 0.1 mm to 1 mm, and the thickness is limited to 1 to 30 deniers. When the length and the thickness are larger, the acrylic fibers 12.12... In the unvulcanized rubber fabric 2 at the time of molding the sole tend to be oriented in the horizontal direction with respect to the ground contact surface. However, the resulting shoe sole may be less slippery. In the present invention, the addition amount of the acrylic fiber is limited to 5 to 25 parts by weight with respect to 100 parts by weight of the rubber, if the addition amount of the acrylic fiber 12.12. This is because if the amount of the acrylic fibers 12.12... Exceeds the above, the abrasion resistance of the ground contact bottom obtained is reduced. Further, in the present invention, the hardness according to JIS K6301 after vulcanization of the unvulcanized rubber material 1 for forming the grounding bottom is limited to 45 to 65 degrees because the grounding bottom is too soft when the hardness is lower than that, and the contacting is not performed. The wear resistance of the underground decreases,
On the other hand, if the hardness is higher than that, the grip of the ground contact surface with respect to the ground is deteriorated, and the slip resistance is reduced.

In the present invention, the unvulcanized rubber material 1 for molding a ground bottom further contains common chemicals for compounding rubber, such as a crosslinking agent, a crosslinking aid, a crosslinking accelerator, a filler, a pigment and a stabilizer.
Further, if necessary, a foaming agent or the like is added, and a Banbury mixer, a Henschel mixer, a mixing glass, a needle,
Mix uniformly with a mixer such as a Dar
It is a sheet that has been sieved to m to 3.0 mm and cut into a grounded bottom shape.

In the present invention, the unvulcanized rubber material 2 for forming the upper bottom is the same as the unvulcanized rubber material 1 for forming the ground bottom.
The main component is natural rubber, isoprene rubber, butadiene rubber, styrene butadiene rubber, high styrene rubber, acrylonitrile rubber, chloroprene rubber, ethylene propylene rubber, chlorinated polyethylene, chlorosulfonated polyethylene, or a mixture of two or more of these. To a rubber compounding agent such as a crosslinking agent, a crosslinking assistant, a crosslinking accelerator, a filler, a pigment, a stabilizer, etc., and, if necessary, a foaming agent, etc., are added, and a Banbury mixer, a Henschel mixer,
The mixture is uniformly mixed by a mixing machine such as a mixer, kneader or the like, and the mixture is sheeted to a thickness of 2.0 mm to 7.0 mm and cut into an upper bottom shape.

The unvulcanized rubber material 1 for forming the ground bottom and the unvulcanized rubber material 2 for forming the upper bottom prepared as above are placed on a molding die, and the upper die is formed by a conventional method. Then, the ground bottom 1 and the upper bottom 2 are vulcanized and integrated, and the surface of the ground bottom 10 is buffed by a grinder or the like to expose the acrylic fiber to the ground plane.

[0013]

According to the present invention, the acrylic fiber can be easily exposed on the ground plane 11 of the ground floor 1 as described above.
In addition, at room temperature, acrylic fiber has the same flexibility as natural fiber, so it does not damage the floor surface.Acrylic fiber has high rigidity like glass fiber below freezing, and the ground bottom is laminated on the upper surface. It is compressed and deformed along the ground by the weight pressure through the upper bottom, and the acrylic fiber pierces the frozen surface, thereby exhibiting excellent anti-slip properties. In the present invention, the shoe sole obtained by foam-forming the upper sole can be reduced in weight.

[0014]

EXAMPLE A mixture of natural rubber and styrene-butadiene rubber having a mixing ratio of 70:30, 100 parts by weight of rubber and a length of 0.5 mm
Acrylic fibers 12.12...
1 part by weight of kneading roll was added by weight and other rubber compounding chemicals, and those having a hardness after vulcanization limited to 55 degrees were kneaded with a kneading roll.
The sheet was sheeted to a thickness of m and cut into a shoe sole shape to prepare an unvulcanized rubber material 2 for forming the upper sole. The unvulcanized rubber material 1 for forming the ground bottom and the unvulcanized rubber material 2 for forming the upper bottom are superimposed and set on a molding die 3.
After heating and pressurizing for 8 minutes, the ground bottom 1 and the upper bottom 2 are vulcanized and integrated, taken out of the mold, and the ground surface 11 of the ground bottom 1 is buffed with a grinder, so that the acrylic fiber 1
Exposure 2.12... Was obtained to obtain an anti-slip sole according to the present invention.

[Brief description of the drawings]

FIG. It is principal part sectional drawing which shows the molded state of the slip resistant shoe sole by this description. B. FIG. 1 is a sectional view of a main part of an anti-slip sole formed according to the present invention.

[Explanation of symbols]

1. Grounding bottom 1 '. 1. Unvulcanized rubber cloth for forming ground bottom 11: ground plane 12: acrylic fiber Top bottom 2 '. 2. Unvulcanized rubber fabric for upper and bottom molding Shoe sole mold

Claims (1)

(57) [Claims] 1. A length of 0.1 mm to 1 mm and a thickness of 1 to 1 mm.
30 denier acrylic fiber 12.12 ... rubber 100
5 to 25 parts by weight per part by weight, JIS after vulcanization
A thin unvulcanized rubber material 1 for molding a ground contact bottom having a hardness of 45 to 65 degrees according to K6301, and JISK after vulcanization
A thick unvulcanized rubber base material 2 for forming an upper sole having a hardness set at 75 to 95 degrees according to 6301 is set on a shoe sole forming die 3, which is heated and pressurized by a conventional method to form a ground sole. 1
And vulcanizing the upper sole 2 and then buffing the surface of the ground sole 1 to expose the acrylic fibers 12.12... To the ground plane 11.