Eva Ethylene Vinyl Acetate

Ethylene vinyl acetate offers good low temperature flexibility.

Eva ethylene vinyl acetate.

Eva is the abbreviation for ethylene vinyl acetate eva films are a key material used for traditional solar panel lamination. It is the basis of many hot melt adhesives when blended with a petroleum wax and a resin tackifier. It shows good chemical resistance. Emblem in packaging technology 2012.

There are three different types of eva copolymer which differ in the vinyl acetate va content and the way the materials are used. As the va content increases crystallinity decreases until at 50 the eva is. With the help of a lamination machine the cells are laminated between films of eva in a vacuum which is under compression. In the solar industry the most common encapsulation is with cross linkable ethylene vinyl acetate eva.

Ethylene vinyl acetate is a type of plastic a polymer with a wide variety of uses both residential and industrial. The main advantages of eva is that it has good toughness flexibility clarity and gloss the ability to withstand low temperatures and good tear resistance. Eva shows good barrier and stretch properties. Eva ethylene vinyl acetate this copolymer resin can be used in adhesives sealants and coatings.

Ethylene vinyl acetate eva is a random copolymer of ethylene and varying amounts of vinyl acetate va. Eva has many attractive properties including low cost excellent. What are ethylene vinyl acetate eva films. Ethylene vinyl acetate properties ethylene vinyl acetate is a flexible and transparent thermoplastic.

Ethylene vinyl acetate or eva is a copolymer of ethylene and vinyl acetate with a structure as shown below. 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 is used in several applications thanks to the varied properties it possesses. Ethylene vinyl acetate copolymer eva properties and applications.

The va comonomer interferes with chain packing reducing crystallinity and thus lowering t m and improving transparency when compared with ldpe. Also it imparts plastic like properties that enable wax to compete effectively with high quality polymeric coatings.