Novel formula of modified foamed ethylene-vinyl acetate (EVA) plastic

Abstract

The invention discloses a novel formula of modified foamed ethylene-vinyl acetate (EVA) plastic. The modified foamed EVA plastic comprises EVA plastic and additives, wherein the additives comprise silicon nitride serving as a wear-resistant agent, chlorinated polyethylene serving as a toughening agent, maleic anhydride graft serving as a compatilizer, diisopropyl azodicarboxylate serving as a foaming agent, mercaptopropyl triethoxysilane serving as a coupling agent and triethylenetetramine serving as a cross-linking agent. By the foaming agent, the EVA plastic can become soft; by the wear-resistant agent, the wear resistance of the product can be improved, and the product is difficult to damage; by the toughening agent, the mechanical strength of the product can be improved; and by the compatilizer, the coupling agent and the cross-linking agent, the internal molecular structure of the product can be tightly combined, the reaction rate in the production process is improved, and production cost is reduced.

Description

technical field [0001] The invention relates to a plastic formula, in particular to a novel modified foamed EVA plastic formula. Background technique [0002] Injection ethylene vinyl acetate copolymer (referred to as EVA) is a product obtained by plasticizing, granulating, and melting EVA raw materials at high temperature, injecting it into a mold through a pipeline, and then foaming outside the mold. The sole of general sports shoes is composed of foam midsole and wear-resistant rubber outsole. Since ethylene-vinyl acetate copolymer (EVA) has good plasticity, elasticity and processability, the foamed material has low density and good mechanical properties. Good, easy coloring and other advantages. At present, most sports shoes are made of EVA foam material in the middle or sole. [0003] Generally, injection EVA products have shortcomings such as serious shrinkage and compression deformation, which have great obstacles and limitations to subsequent production and use, an...

AI Technical Summary

Problems solved by technology

[0003] Generally, injection EVA products have shortcomings such as serious shrinkage and compression deformation, which have great obstacles and limitations to subsequent production and use, and the product wears severely during use. Therefore, a new type of modified foamed EVA is needed.