JPH09276002A - Antistatic shoes and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a stable conducting effect in the soles and bottoms of shoes by a method wherein conductive pieces using carbon fibers or the like having an electric resistance below a specified value are mounted at one point or more in each layer of insole, inner sole and core and successively arranged to partly or wholly overlap in position between layers for reducing changes in electric resistance. SOLUTION: Insoles 6, inner soles 5 and cores 4 are produced from a regenerated leather, a pulp material, an unwoven cloth or the like mixed with metallic fibers, metallic powder, carbon fibers or the like and conductive pieces 8 made up of carbon fibers, aluminum foils, copper plated fabrics or the like with the resistance thereof of below 0.1MΩ are stuck, sewn and welded being folded back on upper and lower sides of the insoles 6, the inner soles and the cores 4 at one point or more in respective same positions where the conductive pieces overlap. This can reduce changes in the electric resistance to yield a stable conducting effect in the soles and the bottoms of the shoes thereby easing impact on the soles with improved wearing touch during walking.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a low electric resistance and is stable, allows static electricity charged on the body to be safely and surely leaked to the ground, and is comfortable to wear. TECHNICAL FIELD The present invention relates to a method for manufacturing an antistatic shoe, which reduces the impact on shoes.

[0002]

2. Description of the Related Art In petroleum plants, paint manufacturing plants, gas stations, etc., various antistatic devices and antistatic shoes are used to prevent human bodies from being charged with static electricity and sparks from the body to prevent ignition and explosion. Has been. Conventionally, antistatic shoes with various structures have been worn, but normally, metal studs are attached to the insole or insole to contact the conductive outsole, and the static electricity charged to the human body is charged. To the ground, or by contacting the non-woven fabric or fiberboard with an insole mixed with, coated with, or mixed with an antistatic agent or antistatic paint, or by contacting the insole with a conductive outsole to leak charged static electricity. ing.

[0003]

When metal studs are attached to the insole or the insole, the metal studs may fall off due to the bending of the walking during wearing, and the antistatic performance may be impaired. When the insole or the insole of the fiberboard is impregnated with the antistatic paint, the conductive effect may be reduced due to the influence of temperature change and moisture. Even when a carbon fiber strip or a copper-plated fiber is mixed with a nonwoven fabric plate or a fiber plate, the mixing may not be uniform, so that the conductive effect may be reduced. In these conventional antistatic shoes, there are many instability factors due to poor contact of the soles, insoles, midsoles, and outsoles, and prevention of these, improvement of comfort during walking, foot It was desired to reduce the impact on the bottom.

[0004]

According to the present invention, a shoe insole (6), an insole (5), and an insole (in which a metal fiber, a metal powder, a carbon fiber, etc. are mixed with recycled leather, pulp material, non-woven fabric, etc. 4) Carbon fiber cloth of 0.1 MΩ or less, aluminum foil,
A conductive piece (8) made of copper-plated cloth or the like is attached at one or more places for each layer of the insole (6), insole (5), and middle shin (4), and the position of each conductive piece is the whole or The outer soles are antistatic shoes which are continuously arranged so that they overlap each other, and the outer soles have conductivity, and the outer soles (9) are made of urethane resin with a foaming agent, an antistatic agent, a crosslinking agent, and a catalyst. A method for producing an antistatic shoe in which an outsole material mixed with a colorant and an isocyanate is injection-molded on an instep cover (7) produced by a usual production method or a shoe sole is joined by an adhesive molding method. . The outsole (9) is also configured as a midsole (3), an inner outsole (1), an outer outsole (2), or a midsole (3) and an outer outsole (2). Furthermore, the conductive piece (8) is attached to the insole (6), the insole (5),
It is also an antistatic shoe that is folded back and attached to the upper and lower surfaces of the arch of each instep of the middle shin (4).

[0005]

In the antistatic shoe of the present invention, the insole (6), the insole (5) and the shin (4) are mixed with regenerated leather, pulp material, non-woven fabric, etc. And a conductive piece (8) made of carbon fiber of 0.1 MΩ or less, aluminum foil, copper-plated cloth, etc., at the same position where the insole (6), the insole (5), and the middle shin (4) overlap. By folding back to the upper and lower surfaces and attaching, sewn, and welding at each place or more to ensure contact with each other, change in electrical resistance is small and stabilized. Generally, the urethane resin outsole has a smaller electric resistance value when the amount of the antistatic agent is increased, but the strength against abrasion and the abrasion resistance are reduced, and it becomes brittle and easily cracked. Not suitable.
Further, since the inner outsole (1) wears particularly quickly, it is difficult to use a large amount of antistatic agent, and it is difficult to reduce the electric resistance value. In the antistatic shoe of the present invention, the midsole (3) and the outer outsole (2) have a urethane resin mixed with a foaming agent, an antistatic agent, a cross-linking agent, a catalyst, a colorant, and an isocyanate, and 0.1 to 10. 100
The conductivity is improved by using the bottom material adjusted to MΩ, and the foaming agent, antistatic agent, cross-linking agent, catalyst and coloring are applied to the urethane resin considering the cushioning property and abrasion resistance of the inner outsole (1). Mixing agent and isocyanate, 0.1-10
An insole (7) manufactured by a normal manufacturing method is manufactured by an injection molding method or an adhesive method to manufacture a surface sole agent having a resistance of 0 MΩ. The wear resistance of can be improved.

[0006]

[Examples] Next, the insole (6), the insole (5), and the midsole (4) were attached to the same position of the conductive piece (8) by folding back and forth one or more places on the midsole (3). ), An inner outsole (1), and an outer outsole (2), an embodiment of the present invention for a method of manufacturing an antistatic shoe will be described with reference to the drawings shown in FIGS. For the insole (6), the insole (5), and the inner shin (4), carbon fibers are mixed with a non-woven fabric, adjusted to 10 MΩ, and manufactured by an ordinary method. The conductive piece is adjusted to 0.1 MΩ with copper-plated fabric and manufactured by a conventional method, and is attached to the upper and lower surfaces of the instep of the insole (6), insole (5) and shin (4). , Wrap and paste. For the midsole (3) and the outer outsole (2), a urethane resin is mixed with a foaming agent, an antistatic agent, a cross-linking agent, a catalyst, a colorant, and an isocyanate, and a bottom sole material adjusted to 0.1 to 100 MΩ is used. The inner outsole (1) has cushioning properties,
To improve abrasion resistance, urethane resin is mixed with foaming agent, antistatic agent, cross-linking agent, catalyst, and colorant, and isocyanate is used. The shoe sole is joined to the instep (7) by an injection molding method to prepare an antistatic shoe.

[0007]

According to the present invention, the conductive piece (8) is provided by folding back the upper and lower surfaces at one or more positions in the same position where the insole (6), the insole (5) and the shin (4) are stacked. )
By ensuring the contact of each, and by providing the midsole (3), the inner outsole (1), and the outer outsole (2), there is little change in electrical resistance and a stable conductive effect of the sole and sole is obtained. It is possible to improve the wearing comfort while walking and to reduce the impact on the sole of the foot. Moreover, when the conductive piece (8) is folded back and attached to the upper and lower surfaces of the arch of the instep of the insole (6), insole (5) and shin (4), there is no discomfort to the foot and it is extremely Comfortable to wear.

[Brief description of drawings]

FIG. 1 is an external view of an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of the embodiment of the present invention.

FIG. 3 is a sectional view taken along line BB of the embodiment of the present invention.

[Fig. 4] Appearance of insole, insole, and middle shin

[Figure 5] Mounting of conductive piece

[Explanation of symbols]

 1 Inner outsole 2 Outer outsole 3 Midsole 4 Middle shin 5 Insole 6 Insole 7 Instep 8 Conductive piece 9 Outsole

Claims (5)

[Claims] 1. Metal fiber, metal powder, carbon fiber, etc.
Carbon fiber of 0.1 MΩ or less, aluminum foil, copper-plated cloth, etc. were used for the insole (6), insole (5), and shin (4) of shoes mixed with recycled leather, pulp material, non-woven fabric, etc. The conductive piece (8) is attached to each layer of the insole (6), the insole (5), and the shin (4) at one or more places, and the conductive pieces are continuously or partially overlapped with each other. Anti-static shoes whose outer soles have conductivity. 2. Metal fiber, metal powder, carbon fiber, etc.
Carbon fiber of 0.1 MΩ or less, aluminum foil, copper-plated cloth, etc. were used for the insole (6), insole (5), and shin (4) of shoes mixed with recycled leather, pulp material, non-woven fabric, etc. The conductive piece (8) is attached to one or more layers of the insole (6), the insole (5), and the shin (4) by folding back and attaching, sewing, or welding to the upper and lower surfaces, and attached. The pieces (8) are continuously arranged so that all or part of them overlap, and urethane foam is mixed with a foaming agent, an antistatic agent, a cross-linking agent, a catalyst, a colorant, and an isocyanate on the outsole (9). A method for producing an antistatic shoe, in which the shoe sole is joined to the instep (7) produced by a usual production method using the above-mentioned outer sole material by an injection molding method or an adhesive molding method. 3. The antistatic shoe according to claim 1, wherein the outsole comprises a midsole (3) and an outsole (2). 4. The antistatic shoe according to claim 1, wherein the outsole comprises a midsole (3), an inner outsole (1) and an outer outsole (2). 5. A conductive piece (8) is attached by folding it back to the upper and lower surfaces of the instep (6), the insole (5) and the shin (4) of the instep of each instep. range,
Antistatic shoes according to the first, third and fourth aspects.