Ethylene-vinyl acetate copolymer (EVA) is a general-purpose polymer with the molecular formula (C2H4)x.(C4H6O2)y. It is flammable and has a non-irritating burning smell.

The chemical Chinese name of EVA is ethylene-vinyl acetate copolymer, the abbreviation of ethylene-vinyl acetate copo. EVA has many uses, and is generally used in the manufacture of antifreeze food bags, various stretched films, sandwich panels (extruded films), greenhouse films and various agricultural production films, high-strength rupture-resistant bags, etc.