EVA/POE supercritical foaming composite shoe material and preparation method thereof

Abstract

The invention belongs to the technical field of footwear products, and particularly relates to an EVA / POE supercritical foaming composite material for shoes and a preparation method thereof. The EVA / POE supercritical foaming composite shoe material in the invention at least comprises the following preparation raw materials in parts by weight: 30-40 parts of an ethylene-vinyl acetate copolymer, 20-30 parts of an ethylene-octene copolymer, 10-20 parts of a styrene-butadiene segmented copolymer, 1-3 parts of peroxide and 1.2-1.6 parts of a nucleating agent. Through a supercritical N2 foaming technology, a foaming temperature range is wide, foam holes are uniformly distributed, pore sizes are controllable, and the material has excellent mechanical properties and use performance such as light weight and high strength, and is high in tensile strength, large in elongation at break, good in tear resistance, low in density, extremely low in compression deformation and extremely good in wear resistance. The foaming process is environmentally friendly, a produced product has no odor of a foaming agent and a cross-linking agent, the same mechanical properties as the mechanical properties of achemical foaming material can be obtained, and the material has profound application prospects.

Description

technical field [0001] The invention belongs to the technical field of footwear products, and in particular relates to an EVA / POE supercritical foaming composite shoe material and a preparation method thereof. Background technique [0002] The cell diameter of ordinary foam plastics is generally greater than 50 microns, and the cell density is less than 106 / cm 3 , but ordinary foam plastics have large pore size cells inside, so that when the material is subjected to external force, it often becomes the birthplace of foam cracks, which reduces the mechanical properties of the material and affects its application field. [0003] EVA chemical foaming material is a relatively conventional foaming material in the application of shoe materials at present. It has soft texture, comfortable and light weight, good anti-slip effect, mechanical strength and rebound performance can meet the requirements of general shoe materials, so it is widely used by consumers. However, with the deve...

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Problems solved by technology

[0002] The cell diameter of ordinary foam plastics is generally greater than 50 microns, and the cell density is less than 106 / cm 3 , but ordinary foam plastics have larger pore size cells inside, so that when the material is subjected to external force, it often becomes the birthplace of foam cracks, which reduces the mechanical properties of the material and affects its application field

[0003] EVA chemical foaming material is a relatively conventional foaming material in the application of shoe materials at present. It has soft texture, comfortable and light weight, good anti-slip effect, mechanical strength and rebound performance can meet the requirements of general shoe materials, so it is widely used by consumers. However, with the development of society, people have higher and higher requirements on the environmental protection and smell of shoes. Because chemical foaming EVA contains chemical foaming agent and chemical cross-linking agent in its base material, it is easy to have foaming agent residue. The environment is not friendly, and there is a slight smell. The uneven foaming caused by the uneven mixing of the foaming agent affects the quality and other problems. The industry is beginning to look for better foaming methods to replace chemical foaming EVA

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