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Principle of EVA foam
EVA foam is a kind of can improve the viscosity of polymer, in order to avoid bubbles contaminated, the stability of the degree of heat tolerance and enhanced bubbles burst, bubbles can make bubbles to generate stable growth, not broken, foaming agent to release the gas, at 100% for the general good of the plant increase the bridging agents EVA foam hardness increases, the proportion increase, whereas decreased, excessive foam resistance of bridge, bridge road, insufficient to bubble burst in the oxygen pressure or increase the antioxidant, helps to increase efficiency and surface quality of the foam foaming temperature air easy to foaming aspect cause surface decomposition or broken.
Generally, the formula is composed of the following raw materials: main material EVA or PE filling agent foaming agent bridging agent foaming promoter lubricant.
Principle of EVA foaming:
1. Through high-temperature chemical reaction, foaming agent generates a large amount of gas to make EVA expand due to heat.
2. Bridging agent: sulfur is added by peroxide.
Single-column hydraulic press--C frame hydraulic press