Ethylene Vinyl Acetate Copolymer Allergy

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

Ethylene vinyl acetate copolymer allergy.

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. Search results for ethylene vinyl acetate at sigma aldrich. Many different grades are manufactured with the vinyl acetate content varying from 5 to 50. In addition poly vinyl acetate ethylene vae copolymers possess enhanced toughness flexibility and serviceability.

It is an extremely elastic and tough thermoplastic of excellent clarity and gloss and with little odor. Disclosed are ethylene vinyl acetate eva copolymer waxes comprising at least about 10 by weight of moieties derived from vinyl acetate the copolymer having a polydispersity mw mn of at least about 6 and a molecular weight mw of from about 15 000 to about 40 000. 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. Eva has many attractive properties including low cost excellent adhesion to many polar and nonporous substrates good flex crack and.

Both effects result in a lowering of the tg of the final copolymer. Ingredients linked to harm to the immune system a class of health problems that manifest as allergic reactions or an impaired capacity to fight disease and repair damaged tissue in the body. Also disclosed are coatings and films comprising the present eva waxes that exhibit sufficient adherence to and. Us3509115a us3509115da us3509115a us 3509115 a us3509115 a us 3509115a us 3509115d a us3509115d a us 3509115da us 3509115 a us3509115 a us 3509115a authority us united states prior art keywords ethylene vinyl acetate pressure reaction mixture temperature prior art date 1968 12 11 legal status the legal status is an assumption and is not a legal conclusion.

Ethylene vinyl acetate copolymer eva for instance is produced by the copolymerization of ethylene and vinyl acetate under pressure using free radical catalysts. Ethylene vinyl acetate or eva is a copolymer of ethylene and vinyl acetate with a structure as shown below. On a weight basis ethylene is far more effective a fact that is reflected in the low tg of polyethylene homopolymer below 80 c.