CN-116751419-B - Anti-skid foaming sole material and preparation method thereof

Abstract

The application relates to the field of polymer foaming materials, and particularly discloses an anti-skid foaming sole material and a preparation method thereof. The anti-skid foamed sole material comprises, by weight, 40-60 parts of an ethylene-vinyl acetate copolymer, 1-3 parts of a foaming agent, 1-3 parts of a cross-linking agent, 10-20 parts of nitrile rubber, 1-3 parts of glass fiber, 0.5-1 part of nano silicon dioxide and 0.3-0.5 part of a coupling agent, wherein the vinyl acetate content in the ethylene-vinyl acetate copolymer is 20-30%. According to the anti-skid foaming sole material, the friction force between the sole material and the ground is improved by adding the glass fiber and the nano silicon dioxide, so that the sole material is promoted to have excellent anti-skid performance.

Inventors

• CHEN QUQIAO
• DING HUAXIONG

Assignees

• 三斯达（江苏）环保科技有限公司

Dates

Publication Date

20260505

Application Date

20230630

Claims (5)

1. 1. The anti-skid foaming sole material is characterized by comprising the following raw materials, by weight, 40-60 parts of an ethylene-vinyl acetate copolymer, 1-3 parts of a foaming agent, 1-3 parts of a cross-linking agent, 10-20 parts of nitrile rubber, 1-3 parts of glass fiber, 0.5-1 part of nano silicon dioxide, 0.3-0.5 part of a coupling agent and 0.5-2 parts of beta-cyclodextrin, wherein the content of vinyl acetate in the ethylene-vinyl acetate copolymer is 20-30%; The foaming agent is an azodicarbonamide master batch, and the azodicarbonamide master batch comprises, by weight, 20-30 parts of azodicarbonamide powder, 15-20 parts of ethylene-vinyl acetate copolymer and 0.5-1 part of polyethylene glycol.
2. 2. The anti-slip foam sole material of claim 1, wherein the sole material further comprises 0.3-0.5 parts of zinc stearate.
3. 3. The non-slip foam sole material of claim 1, wherein the glass fibers have a length of 4-8mm.
4. 4. A method for preparing the anti-slip foaming sole material as claimed in any one of claims 1 to 3, which is characterized by comprising the following specific steps: mixing and banburying an ethylene-vinyl acetate copolymer, nitrile rubber, glass fiber, silicon dioxide and a coupling agent to obtain a mixture, adding a foaming agent and a cross-linking agent into the mixture, mixing and banburying, discharging and foaming to obtain the anti-skid foaming sole material.
5. 5. The method for producing an anti-slip foamed sole material according to claim 4, wherein the foaming temperature is 150 to 160 ℃.

Description

Anti-skid foaming sole material and preparation method thereof Technical Field The application relates to the field of polymer foaming materials, in particular to an anti-skid foaming sole material and a preparation method thereof. Background The ethylene-vinyl acetate copolymer EVA sole material has good softness and elasticity and good chemical stability, so the EVA sole is widely applied to soles and interior decoration materials of sneakers, mountain climbing shoes and the like. The EVA sole material with certain elasticity plays a certain role in damping by foaming the EVA material so that the sole is lighter. However, after the EVA material is foamed, the physical properties are greatly reduced, the dimensional stability is poor, the shoe sole is easy to denature, the anti-skid property of the shoe sole is poor, and the service life of the shoe sole is seriously shortened. Disclosure of Invention The application provides an anti-skid foaming sole material and a preparation method thereof in order to improve the anti-skid performance of a foaming EVA sole material. In a first aspect, the present application provides an anti-slip foamed sole material, which adopts the following technical scheme: The anti-skid foamed sole material comprises, by weight, 40-60 parts of an ethylene-vinyl acetate copolymer, 1-3 parts of a foaming agent, 1-3 parts of a cross-linking agent, 10-20 parts of nitrile rubber, 1-3 parts of glass fiber, 0.5-1 part of nano silicon dioxide and 0.3-0.5 part of a coupling agent, wherein the vinyl acetate content in the ethylene-vinyl acetate copolymer is 20-30%. By adopting the technical scheme, the nitrile rubber and the ethylene-vinyl acetate copolymer are compounded to be used as the sole material matrix, the nitrile rubber can improve the wear resistance and the waterproof performance of the sole material, the glass fiber can improve the roughness, the tensile strength and the elongation at break of the sole material, the friction between the sole material and the ground is improved, and the prepared sole material is anti-skid and wear-resistant. The nano silicon dioxide can improve the roughness of the sole material, enhance the friction between the manufactured sole material product and the ground, and improve the anti-skid property of the sole. Meanwhile, the nano silicon dioxide has larger specific surface area, can be fully contacted with a polymer matrix in a sole material system, and can uniformly improve the anti-skid property of the sole material. The nano silicon dioxide surface is also provided with a certain micropore, so that the foaming agent can be loaded and activated, the dispersibility of the foaming agent in the sole material is improved, uniform and stable cells are formed in the sole material system, and the foaming efficiency is improved. The coupling agent can promote the combination of nano silicon dioxide and glass fiber with other components, and improve the crosslinking degree among the components of the sole material system, thereby improving the strength and the anti-skid performance of the sole product. Controlling the vinyl acetate content of the ethylene-vinyl acetate copolymer within a suitable range promotes the ethylene-vinyl acetate copolymer matrix to have suitable elasticity and tensile strength, and if the vinyl acetate content of the ethylene-vinyl acetate copolymer is too low, the prepared sole material is reduced in elasticity and flexibility, resulting in stiffening of the sole product, and reduced friction between the sole material and the ground, further affecting the wear resistance and slip resistance of the sole product. Preferably, the foaming agent is azodicarbonamide master batch. Through adopting above-mentioned technical scheme, use azodicarbonamide master batch better than the dispersibility of conventional foamer powder in sole material system, the cell that azodicarbonamide master batch formed in sole material system is fine and uniform to for closed cell structure, when sole goods received external force to strike, the gas in the cell can expand and resume sole deformation, and azodicarbonamide master batch can improve sole material's elasticity and tear strength. Preferably, the raw materials of the azodicarbonamide master batch comprise, by weight, 20-30 parts of azodicarbonamide, 15-20 parts of ethylene-vinyl acetate copolymer and 0.5-1 part of polyethylene glycol. By adopting the technical scheme, the azodicarbonamide master batch prepared by taking the ethylene-vinyl acetate copolymer as a matrix can promote the azodicarbonamide foaming agent to have better compatibility in a sole material system. The polyethylene glycol can improve the dispersibility of the azodicarbonamide in the ethylene-vinyl acetate copolymer matrix, can further promote the uniform and stable foaming of the sole material, and promotes the sole product to have better elasticity and deformation resistance. Meanwhile, polyethylene glycol can react with s