Ethylene-vinyl acetate

Uncommon card · No. 150943

Ethylene-vinyl acetate (EVA), also known as poly(ethylene-vinyl acetate) (PEVA), is an elastomeric copolymer of ethylene and vinyl acetate that produces materials which are "rubber-like" in softness and flexibility. The material has good clarity and gloss, low-temperature toughness, stress-crack resistance, hot-melt adhesive waterproof properties, and resistance to UV radiation. EVA has a distinctive vinegar-like odor and is competitive with rubber and vinyl polymer products in many electrical applications. The types of EVA copolymers differ in the vinyl acetate (VA) content and the way the materials are used. The weight percent of vinyl acetate usually varies from 1 to 40%, with the remainder being ethylene. Many properties of the copolymer are determined by the VA content, although the glass transition temperature is relatively invariant at -25 to -30 °C. EVA copolymer which is based on a low proportion of VA (approximately up to 4%) may be referred to as vinyl acetate modified polyethylene...

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