What is eva?

What kind of material is eva foam? Eva is the abbreviation of ethylene-vinyl acetate copolymer in English. Eva foam is a kind of copolymer, which is foamed from ethylene and vinyl acetate, also called eva foam. Generally, the content of vinyl acetate (eva) is between 5% and 40%. Compared with polyethylene, eva material is widely used in foaming due to the introduction of vinyl acetate monomer in the molecular chain, thereby reducing high crystallinity, improving flexibility, impact resistance, filler compatibility and heat sealing performance. Shoes materials, functional shed films, packaging films, hot melt adhesives, wires and cables, toys and other fields.

It is a relatively common midsole material. It is usually called a foam and has a certain cushioning effect, but this material is very slippery, so it is generally mixed with hard rubber. The eva material is a common material, which is used in many sports. It is available on shoes, but it is difficult to compare with AIR in terms of effect.