Ethylene Vinyl Acetate Copolymer Resin

Ethylene vinyl acetate eva copolymer resins.

Ethylene vinyl acetate copolymer resin.

Ethylene vinyl acetate eva copolymer cas no. As the va content increases crystallinity decreases until at 50 the eva is. Eva copolymers are used in molded caps and seals footwear and car interiors. Ethylene vinyl acetate copolymer resins sealing the deal our elvax ethylene vinyl acetate eva copolymer resins offer a variety of solutions for your sealants in meat and dairy packaging structures footwear wire and cable insulation as well as photovoltaic encapsulants and sheets.

Ethylene vinyl acetate eva is a random copolymer of ethylene and varying amounts of vinyl acetate va. Eva ethylene vinyl acetate this copolymer resin can be used in adhesives sealants and coatings. These material are used when a combination of softness toughness flexibility and polarity are needed. 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.

On a weight basis ethylene is far more effective a fact that is reflected in the low tg of polyethylene homopolymer below 80 c. Chemical formula diagram. Resin for packaging adhesives film forming and molding resins hot. Ethylene vinyl acetate copolymer eva properties and applications.

Ethylene vinyl acetate eva copolymers are used in extrusion film processes for applications including packaging surface protection and greenhouse covers and in photovoltaic cell encapsulation. It is an extremely elastic and tough thermoplastic of excellent clarity and gloss and with little odor. Having outstanding clarity gloss and weather resistance our nipoflex resins offer flexibility over wide temperature ranges as well as high impact strength elasticity and resistance to flex and environmental stress cracking. Both effects result in a lowering of the tg of the final copolymer.

It is the basis of many hot melt adhesives when blended with a petroleum wax and a resin tackifier. The va comonomer interferes with chain packing reducing crystallinity and thus lowering t m and improving transparency when compared with ldpe. Relevant identified uses of the substance or mixture and uses advised against. Eva offers good bondability and adhesion to polar substrates in extrusion coating and multi layer film applications.

Emblem in packaging technology 2012. 24937 78 8 ethylene vinyl acetate eva ethylene vinyl acetate copolymer ethylene vinyl acetate polymer 1 2. In addition poly vinyl acetate ethylene vae copolymers possess enhanced toughness flexibility and serviceability. Also it imparts plastic like properties that enable wax to compete effectively with high quality polymeric coatings.