Ethylene/vinyl acetate copolymer, hereinafter referred to as EVA. The content of vinyl acetate (VA) from 5% to 40%, compared with polyethylene (PE), EVA due to the introduction of vinyl acetate monomer in the molecular chain, which reduces the high crystallinity, improved the toughness and impact resistance, heat intermiscibility of filling and sealing performance, are widely used in foaming material, functional films, packaging mould, hot melt adhesive, wire and cable and toys, and other fields
EVA foam foaming process usually can be divided into two stages: the first is in the plastic melt or liquid form in a large number of uniform, fine bubbles, the plastic bubble continues to swell as required by the body structure, the final curing finalize the design fixed will bubble structure, get the foam. EVA foam plastic molding methods mainly such as extrusion, injection and molding.
The extrusion,injection and molding are commonly in EVA foam plastic molding
EVA foam common enquipment
Open mixing machine, internal mixing machine and vulcanizing machine