What Is Ethylene Vinyl Acetate Copolymer

The food and drug administration fda has stated that ethylene vinyl acetate is safe when used in food production packaging or transportation and it s not an especially dangerous material.

What is ethylene vinyl acetate copolymer.

Ethylene vinyl acetate is a type of plastic a polymer with a wide variety of uses both residential and industrial. Since vinyl alcohol is highly unstable with respect to acetaldehyde the preparation of vinyl acetate is more complex than the synthesis of other acetate esters. On a weight basis ethylene is far more effective a fact that is reflected in the low tg of polyethylene homopolymer below 80 c. It is an extremely elastic and tough thermoplastic of excellent clarity and gloss and with little odor.

Many different grades are manufactured with the vinyl acetate content varying from 5 to 50 percent by weight. Vinyl acetate is the acetate ester of vinyl alcohol. In addition poly vinyl acetate ethylene vae copolymers possess enhanced toughness flexibility and serviceability. The food and drug administration fda has determined that.

The va comonomer interferes with chain packing reducing crystallinity and thus lowering t m and improving transparency when compared with ldpe. Ethylene vinyl acetate eva is a random copolymer of ethylene and varying amounts of vinyl acetate va. Ewg s skin deep rates thousands of personal care product ingredients culled from ingredient labels on products based on hazard information pulled from the scientific literature and industry academic and regulatory databases. The major industrial route involves the reaction of ethylene and acetic acid with oxygen in the presence of a palladium catalyst.

They are also used to make paints textiles and paper. Ethylene vinyl acetate or eva is a copolymer of ethylene and vinyl acetate with a structure as shown below. As the va content increases crystallinity decreases until at 50 the eva is. Vinyl acetate is used to make other industrial chemicals such as polyvinyl acetate polymers and ethylene vinyl acetate copolymers.

Ethylene vinyl acetate copolymer eva for instance is produced by the copolymerization of ethylene and vinyl acetate under pressure using free radical catalysts. Other articles where ethylene vinyl acetate is discussed. Emblem in packaging technology 2012. Ethylene vinyl acetate eva also known as poly ethylene vinyl acetate peva is the copolymer of ethylene and vinyl acetate the weight percent of vinyl acetate usually varies from 10 to 40 with the remainder being ethylene.

There are three different types of eva copolymer which differ in the vinyl acetate va content and the way the materials are used.