What Is Ethylene Vinyl Acetate

Ethylene vinyl acetate eva is a random copolymer of ethylene and varying amounts of vinyl acetate va.

What is ethylene vinyl acetate. Ethylene vinyl acetate copolymer eva for instance is produced by the copolymerization of ethylene and vinyl acetate under pressure using free radical catalysts. Many different grades are manufactured with the vinyl acetate content varying from 5 to 50 percent by weight. 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. Biodegradable ethylene vinyl acetate eva plastic is the copolymer of ethylene and vinyl acetate polymers.

The weight percent vinyl acetate usually varies from 10 to 40 with the remainder being ethylene. Ethylene vinyl acetate is a type of plastic a polymer with a wide variety of uses both residential and industrial. The weight percent of vinyl acetate usually varies from 10 to 40 with the remainder being ethylene. Eva copolymers are more permeable to.

Ethylene vinyl acetate also known as eva is the copolymer of ethylene and vinyl acetate. The va comonomer interferes with chain packing reducing crystallinity and thus lowering t m and improving transparency when compared with ldpe. Vinyl acetate is the acetate ester of vinyl alcohol. It is a polymer that approaches elastomeric materials in softness and flexibility yet can be processed like other thermoplastics.

There are three different types of eva copolymer which differ in the vinyl acetate va content and the way the materials are used. 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. The major industrial route involves the reaction of ethylene and acetic acid with oxygen in the presence of a palladium catalyst.