[Hot Item] EVA Bio Color Thick Style Factory Price Sneaker Shoe Sole

EVA is the English abbreviation of ethylene-vinyl acetate copolymer. It is a random copolymer composed of non-polar, crystalline ethylene monomer and highly polar, non-crystalline vinyl acetate monomer (also known as VA).

Compared with PE, EVA reduces the crystallinity, improves flexibility, impact resistance, filler mixability and heat sealability due to the introduction of vinyl acetate monomer into the molecular chain. The general density is between 0.91 and 0.93. , good transparency and gloss.

EVA is a thermoplastic polymer, so it can be used in injection molding, extrusion, blow molding, calendering, rotational vacuum thermoforming, foaming, coating, heat sealing, welding and other processing and forming processes.

EVA materials have always been widely used in shoe materials. Its blended foam shoe materials have properties such as softness, good elasticity, shock absorption, and chemical resistance. They are widely used in medium and high-end travel shoes, hiking shoes, slippers, and sandals. soles, etc.

In terms of shoe materials, there are generally three EVA foaming processes: traditional flat plate large foaming, in-mold small foaming and injection cross-linked foaming. Among them, molded foaming and injection cross-linked foaming are most commonly used. In recent years, with the development of supercritical foaming process, EVA materials can also realize the foaming application of this process.