KR20130107157A - The outsole of a shoe having non-slip function and its manufacturing method - Google Patents

Abstract

PURPOSE: An outsole with a non-slip function is provided to prevent a slip and safety accidents. CONSTITUTION: A method for manufacturing an outsole with a non-slip function comprises the following steps: mixing 56 wt% of ethylene vinyl acetate, 6 wt% of natural rubber, 11 wt% of polyolefin resin, 11 wt% of styrene butadiene rubber, 2 wt% of polymer, 1 wt% of silicone rubber in a mixing vessel; putting 7 wt% of calcium carbonate into the mixture to prevent the generation of toxic gas; putting 2 wt% of zinc oxide into the mixture to generate a chemical reaction; putting 1 wt% of stearic acid into the mixture to prevent particles from cohering; putting 1 wt% of cross-linking agent into the mixture to form polymers; and putting 2 wt% of foaming agent into the mixture to foam the polymers. [Reference numerals] (AA) Step of producing a mixture; (BB) Step of injecting counteragent; (CC) Step of injecting acceleration promoter; (DD) Step of injecting dispersant; (EE) Step of injecting cross-linking agent; (FF) Step of injecting blowing agent; (GG) Composite

Description

The outsole of a shoe having non-slip function and its manufacturing method

The present invention relates to a shoe sole having a non-slip function and a method of manufacturing the same, and more particularly, to produce a sole that further improves the non-slip function by injection foam molding, thereby preventing slippage on a road surface having a high inclination angle. It is possible to prevent, and to provide a shoe sole having a non-slip function and a method of manufacturing the same to provide a stable upright walking and the effect of improving the comfort by walking in a state in which the bottom of the sole is in close contact with the bottom of the ground when walking.

Shoe soles provide the ability to absorb shocks or external shocks transmitted throughout the body, to hold the feet stable and to prevent slipping on industrial sites and road surfaces.

And as a background technology of the invention to provide an anti-slip function, the sole of the shoe is made, such as the Republic of Korea Patent Publication No. 10-1993-0002078 and the Republic of Korea Patent Publication No. 10-2011-0043554, the shoe sole is in close contact with the road surface There is a need for a manufacturing process for attaching the non-slip portion to prevent the sliding phenomenon, resulting in a number of problems, such as increased manufacturing process time and manufacturing cost.

And it is manufactured as a shoe or a sole of a shoe by foam molding using a foam as in Korea Patent Publication No. 10-0973375 to provide tensile strength, compressive deformation, tear strength, and non-slip protrusion at the bottom to provide a non-slip function of the shoe. Although manufactured integrally, there was a problem in that the surface of the non-slip protrusion is smooth and smooth, thereby reducing the non-slip function.

KR 10-1993-0002078 A 1993.02.22. KR 10-2011-0043554 A 2011.04.27. KR 10-0973375 B1 2010.07.30.

Therefore, the present inventors have devised to solve the problems of the shoe and the manufacturing method of the injection-foamed molding using the above-described conventional foam, in the present invention is close to the floor of the ground even in the place of high moisture or road surface and construction site of high inclination angle. The present invention has been completed with a technical problem in providing a shoe sole having a non-slip function and a method of manufacturing the same, which prevents the sliding phenomenon.

In the present invention as a solution to the problem in the manufacturing method of the shoe sole produced by injection foam molding, 56% by weight of ethylene vinyl acetate resin, 6% by weight of natural rubber and 11% by weight of polyolefin resin, 11% by weight of styrene-butadiene rubber, A mixture generation step made by mixing 2% by weight of polymer and 1% by weight of silicone rubber in a mixing container; Neutralizing agent inflow step of introducing 7% by weight of calcium carbonate into the mixture to reduce the generation of toxic gases harmful to the human body in the process of promoting vulcanization and crosslinking and bubbles; A promoter inflow step of introducing 2% by weight of zinc oxide into the mixture such that different polymers of the mixture undergo chemical reactions; A dispersant inlet step of pulverizing the particles agglomerated with the large particles into smaller mixtures and colloidal particles, and introducing 1% by weight of stearic acid to prevent agglomeration of the generated microparticles; A crosslinking agent input step of adding 1% by weight of a crosslinking agent to form a high molecular compound of a three-dimensional network by combining the polymers with each other through chemical bonding during the chemical reaction of the mixture; And a foaming agent input step of introducing 2% by weight of a foaming agent to foam molding after the polymer compound in which the polymers are bonded to each other by the compounding reaction is introduced into the foaming molding machine.

In the present invention, in the shoe sole manufactured by injection-foaming molding, 56% by weight of ethylene vinyl acetate resin, 6% by weight of natural rubber, 11% by weight of polyolefin resin, 11% by weight of styrene-butadiene rubber, 2% by weight of polymer, silicone rubber 1% by weight of the mixture in a mixing vessel to form a mixture, the mixture is mixed with 7% by weight of calcium carbonate, a neutralizing agent that reduces the generation of toxic gases harmful to the human body in the process of vulcanization, crosslinking, bubbles 2% by weight of zinc oxide, an accelerator, and a mixture in which the chemical reaction was carried out to pulverize the different polymers of the different polymers were formed into smaller particles and colloidal particles, 1% by weight of stearic acid, a dispersant that prevents agglomeration, is introduced into the mixture. 1% by weight of a crosslinking agent is added to form a polymer compound having a three-dimensional network structure by combining with a chemical bond, and 2% by weight of a blowing agent, which is a foaming agent, is injected to form a polymer compound in which polymers are bonded to each other by a compounding reaction. Was injected into an injection foam molding machine and foamed to constitute a molding.

The shoe sole having a non-slip function in the present invention prevents the phenomenon that the lower surface is in close contact with the slip even on the road surface having a high inclination angle, thereby providing an effect that can prevent the safety accident in advance.

And the upper surface of the sole and the sole of the foot is in close contact with each other can provide a stable upright walking and the effect of further improving the fit of the shoe.

1 is a block diagram showing a method for producing a composition which is a blowing agent provided in the present invention.
Figure 2 is a bottom perspective view of a shoe sole prepared by injection foam molding with a composition of the present invention

Hereinafter, the present invention will be described.

The present invention is a composition that is made for manufacturing a shoe sole 10 formed in the lower portion of the shoe or the upper and the sole integrally, the composition is injected into a foam injection molding machine that is separated up and down and foamed to form a shoe or Shoe sole 10 is manufactured.

Looking at the step of producing the composition with reference to Figure 1,

1) Mixture Generation Step

: 56% by weight of ethylene vinyl acetate resin, 6% by weight of natural rubber, 11% by weight of polyolefin resin, 11% by weight of styrene-butadiene rubber, 2% by weight of polymer, 1% by weight of silicone rubber are mixed to mix evenly. Produces a mixture.

Ethylene Vinyl Acetate (EVA) resin is determined by polymerization degree and content of vinyl acetate, and has excellent flexibility and impact strength, weather resistance, tear strength, stress crack resistance, and ozone resistance. It is improved, it is lighter than rubber, and when the content of vinyl acetate is high, flexibility is improved and melting point is improved, and it is compatible with PE (Polyethylene), PP (Polypropylene), PVC (Poly Vinyl Chloride) and rubber. Since it is satisfactory, it is mixed and used for improving impact resistance and workability.

Natural rubber is generally a chain-like polymer material obtained from plants, and cuts latex (latex) of sap by wounding Para rubber tree to solidify and dry to make raw rubber. Raw rubber has many defects to be used as it is in everyday life because it has high adhesiveness and severe elastic change. Therefore, it is a bond formed by bridges between atoms and atoms that are connected in a chain form by reacting sulfur with raw rubber. It is produced and used by the vulcanization method to form a.

Polyolefine resin is a polymer compound produced by the polymerization of olefin, a chain-shaped hydrocarbon compound having one double bond. It is the lightest among plastics and has excellent transparency. It has a melting point of 350 ° C and a heat deformation temperature of 200. It has a heat resistance of ℃.

Styrene-butadiene rubber (abbreviated as SBR) is a polymer obtained by emulsifying polymerizing so that the ratio of styrene and butadiene is about 1: 3. It is a representative synthetic rubber and has excellent wear resistance, aging resistance, and heat resistance. Its properties are almost the same as those of natural rubber and can be vulcanized with sulfur.

Polymer is a compound in which one or several kinds of structural units are polymerized and connected to each other by a large number of chemical bonds, and include vinyl chloride and nylon.

Silicon rubber, also called silicon rubber, is a colorless or faint yellow elastic solid with slight fluidity even at room temperature. It has good heat resistance and does not lose rubber elasticity. It has good heat resistance and is stable even at -65 ~ 260 ℃. It is excellent in oxidation resistance, ozone resistance, and weather resistance, and is used for sealing windows of aircraft and in places requiring water repellency.

2) Neutralizer inflow stage

: 7% by weight of calcium carbonate, a neutralizing agent, is introduced into the mixture to reduce the generation of toxic gases harmful to the human body in the process of promoting vulcanization, crosslinking, and bubbles.

Calcium carbonate (CaCO3) is produced by dissolving carbonic acid ions in water or hydrogen carbonate and calcium ions, which produce calcium carbonate.It is included in toothpaste, paints and building materials. It is one of industrial materials and used as various neutralizing agents, and it is used for increasing weight, impact resistance, dimensional stability, smoothness, wear resistance, surface activity, workability improvement and toxic gas concentration reduction.

3) Promoter Inflow Stage

: Different polymers in the mixture are introduced with 2% by weight of zinc oxide, an accelerator, to enable chemical reaction.

Zinc oxide (ZnO) is called zincation and zinc white, and the compound of oxygen and zinc is a light white powder, naturally produced as red zincite, and industrially zinc metal is heated to vaporize and burned with air, It is made by burning zinc sulfate or zinc nitrate, and is used as medicine, pigment, cosmetic raw materials.

4) Dispersant input stage

: A mixture of chemical reactions is pulverized and the particles are agglomerated into smaller particles and colloidal particles, and 1% by weight of stearic acid, a dispersant, is introduced to prevent aggregation of the produced fine particles.

Stearic acid (Stearic Acid) is a white leaf-shaped crystalline mass, used as a bone or dispersant in rubber or plastics, and is a solid fatty acid obtained from fats. Used as

5) Crosslinking agent input step

: 1% by weight of crosslinking agent is added to make polymer compound of 3D network structure by combining polymers with each other during chemical reaction of mixture.

Cross-linking agent (Corss-linking agent) is a material that plays a role of cross-linking between the chain-like polymer chain, giving the resin mechanical strength and chemical stability, such as hardness and elasticity.

6) Foaming step

: A mixture of polymers bonded to each other by chemical reaction is introduced into a foam molding machine, and then 2% by weight of a foaming agent is added to foam molding to form a composition of the present invention.

Blowing agent (Blowing agent) is a substance that generates bubbles during the polymer reaction that causes the reaction of a very large molecular weight of a large number of small molecules repeatedly combined with plastic or rubber, also called an expansion agent or foaming agent, and largely with a chemical blowing agent Two kinds of physical blowing agents are divided, and the chemical blowing agent is used as a blowing agent because it foams in carbon dioxide generated by reaction with water using the activity of isocyanate group, and the physical blowing agent is mixed with gas or decomposed type Alternatively, evaporative blowing agents are used to generate heat of reaction to form bubbles.

When the composition formed in the above step is injected into the injection foam molding machine, the foam is molded into a shape and a pattern formed in the mold by the foaming agent to complete the shoe sole 10 as shown in FIG.

Looking in detail as a comparison chart of the physical properties of the present inventors compared and tested the existing product and the developed product of the present invention,

Hardness, Tensile Strength, Tear Strength, and Specific Gravity are not different from the existing products, as shown above. Split tear (Strength)) and elongation, compression set, shrinkage, and abrasion, which test the rate of increase, are further improved than the existing products, and in particular, the present invention Provides better wear resistance than the product.

In addition, when the existing product and the development product were placed on the glass surface for sliding test, the angle at which these products slipped downward when one side of the glass surface was raised was measured. As a result, both the dry and wet conditions of the present invention were dried. It can be seen that the developed product of.

In addition, when the existing product and the development product is placed on the glass surface and the force is pulled from one side, the bottom of the shoe sole 10 slides off the glass surface and the sliding resistance test results show that both dry and wet are excellent.

And as a result of requesting the slip resistance test of the existing product and the developed product made of the composition of the present invention to a specialized institution, it can be confirmed that the product of the present invention is improved as described in the test report.

In the above test report, ①NO. 1 is a developed product of the present invention, ②NO. 2 is an existing product, and it can be seen that in the sliding resistance test, both dry and wet are improved.

As described above, the present invention closely adheres to the surface of the shoe sole 10 when walking at a high inclination angle such as a road surface or a construction site, thereby preventing slippage and thus preventing a safety accident in advance. The wear resistance is excellent without being worn out, and the wearability of the shoes is improved by walking upright with the upper surface of the shoes and the soles of the shoes being closely adhered to each other.

The detailed description of the present invention has been provided for specific embodiments, and various modifications may be made without departing from the scope of the present invention. Therefore, the scope of protection of the present invention is not limited to the embodiments described in the above specification, and the scope of the equivalent means of the following claims is to be covered.

10: shoe sole

Claims (2)

In the manufacturing method of a shoe sole manufactured by injection foam molding,
Step of producing a mixture made by mixing 56% by weight of ethylene vinyl acetate resin, 6% by weight of natural rubber, 11% by weight of polyolefin resin, 11% by weight of styrene-butadiene rubber, 2% by weight of polymer, and 1% by weight of silicone rubber ;
Neutralizing agent inflow step of introducing 7% by weight of calcium carbonate into the mixture to reduce the generation of toxic gases harmful to the human body in the process of promoting vulcanization and crosslinking and bubbles;
A promoter inflow step of introducing 2% by weight of zinc oxide into the mixture such that different polymers of the mixture undergo chemical reactions;
A dispersant inlet step of pulverizing the particles agglomerated with the large particles into smaller mixtures and colloidal particles, and introducing 1% by weight of stearic acid to prevent agglomeration of the generated microparticles;
A crosslinking agent input step of adding 1% by weight of a crosslinking agent to form a high molecular compound of a three-dimensional network by combining the polymers with each other through chemical bonding during the chemical reaction of the mixture;
And a foaming agent injecting step of adding 2% by weight of a foaming agent to foam molding after the polymer compound in which the polymers are bonded to each other by a compounding reaction is introduced into the foaming molding machine.
For shoe soles made by injection foam molding,
56% by weight of ethylene vinyl acetate resin, 6% by weight of natural rubber, 11% by weight of polyolefin resin, 11% by weight of styrene-butadiene rubber, 2% by weight of polymer and 1% by weight of silicone rubber were mixed in a mixing container to form a mixture.
7% by weight of calcium carbonate, which is a neutralizing agent that reduces the generation of toxic gases harmful to the human body in the process of promoting vulcanization, crosslinking, and foaming, and zinc oxide, which is an accelerator of activating a chemical reaction between different polymers of the mixture. 2% by weight and a mixture of chemical reactions are pulverized into large particles and agglomerated particles into smaller particles and colloidal particles, and 1% by weight of stearic acid, a dispersant which prevents agglomeration of the produced fine particles, is introduced into the mixture. ,
1% by weight of a crosslinking agent is added to form a three-dimensional network compound by combining the polymers with each other during chemical reaction of the mixture.
A shoe sole having a non-slip function, characterized in that the compound formed by adding 2% by weight of a blowing agent as a foaming agent so as to foam-molded a polymer compound in which the polymers are bonded to each other by foaming it by injection into a injection molding machine.

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