Resin for packaging adhesives film forming and molding resins hot.
Ethylene vinyl acetate copolymer resin.
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.
On a weight basis ethylene is far more effective a fact that is reflected in the low tg of polyethylene homopolymer below 80 c.
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 copolymer resins.
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.
These material are used when a combination of softness toughness flexibility and polarity are needed.
As the va content increases crystallinity decreases until at 50 the eva is.
Also it imparts plastic like properties that enable wax to compete effectively with high quality polymeric coatings.
It is the basis of many hot melt adhesives when blended with a petroleum wax and a resin tackifier.
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 or eva is a copolymer of ethylene and vinyl acetate with a structure as shown below.
24937 78 8 ethylene vinyl acetate eva ethylene vinyl acetate copolymer ethylene vinyl acetate polymer 1 2.
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.
It is an extremely elastic and tough thermoplastic of excellent clarity and gloss and with little odor.
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.
Both effects result in a lowering of the tg of the final copolymer.
Eva ethylene vinyl acetate this copolymer resin can be used in adhesives sealants and coatings.
Ethylene vinyl acetate copolymer eva properties and applications.
Relevant identified uses of the substance or mixture and uses advised against.
Ethylene vinyl acetate eva is a random copolymer of ethylene and varying amounts of vinyl acetate va.
Chemical formula diagram.
In addition poly vinyl acetate ethylene vae copolymers possess enhanced toughness flexibility and serviceability.
Eva offers good bondability and adhesion to polar substrates in extrusion coating and multi layer film applications.
Ethylene vinyl acetate eva copolymer cas no.
