EVA foam material taking four components as base material and preparation method of EVA foam material

Abstract

The invention provides an EVA foam material taking four components as base materials and a preparation method of the EVA foam material. The foam material comprises the following substances in parts by mass: 70-90 parts of ethylene-vinyl acetate copolymer, 10-30 parts of rubber, 1-9 parts of starch, 1-9 parts of calcium carbonate, and 4.6-7.3 parts of an additive, wherein the additive comprises a foaming agent, a cross-linking agent and a combined foaming aid. The foam material has the characteristics of being excellent in mechanical property, uniform in foam hole distribution, capable of realizing natural degradation, and the like, can be widely applied to shoe materials, jigsaw puzzle for kids, foamed floors, precise electronic instruments, electrical equipment, packing materials of medical instruments, and the like.

Description

technical field [0001] The invention relates to an EVA foam material with a quaternary component as a matrix and a preparation method thereof, belonging to the field of polymer materials. Background technique [0002] EVA foaming material refers to the foaming material made of ethylene-vinyl acetate copolymer (EVA) as raw material, and after adding other foaming aids, foaming by molding or injection molding. [0003] EVA-based foaming materials, as an important member of polymer-based foaming materials, are widely used in shoe materials, luggage linings, toy materials, sporting goods, building materials, electronic accessories, and automotive interiors. However, traditional EVA foam materials have disadvantages such as uneven distribution of cells, poor mechanical strength, poor elasticity, large compression set, poor weather resistance, and poor aging resistance, which will cause greater obstacles to subsequent production and use. limited. [0004] Patent CN103756111A d...

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Problems solved by technology

[0008] Most of the above-mentioned patent documents involve binary or ternary composite material foaming systems, and the involved quaternary composite material foaming systems also have deficiencies, which cannot meet the requirements of uniform cell distribution, low density, and high resilience at the same time. , excellent aging resistance, low cost, and environmental friendliness have limited its application.

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