Eva Ethylene Vinyl Acetate Properties

It is an extremely elastic and tough thermoplastic of excellent clarity and gloss and with little odor.

Eva ethylene vinyl acetate properties.

1 the ethylene portion provides miscibility with ethylene copolymers while the vinyl acetate portion increases the. Eva is used in several applications thanks to the varied properties it possesses. 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.

It shows good chemical resistance. 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. Ethylene vinyl acetate eva copolymers are random linear copolymers produced by the copolymerization of ethylene and vinyl acetate va either in a high temperature and high pressure free radical process or for high vinyl acetate materials in emulsion. It is the basis of many hot melt adhesives when blended with a petroleum wax and a resin tackifier.

Ethylene vinyl acetate or eva is a copolymer of ethylene and vinyl acetate with a structure as shown below. The properties are largely dependent on the molecular weight and the vinyl acetate content. Ethylene vinyl acetate copolymer eva properties and applications. Ethylene copolymers top all thermoplastics middle and the entire database bottom.

Ethylene vinyl acetate offers good low temperature flexibility. Eva ethylene vinyl acetate this copolymer resin can be used in adhesives sealants and coatings. The graph bars on the material properties cards further below compare eva to. Ethylene vinyl acetate eva is a random copolymer of ethylene and varying amounts of vinyl acetate va.

As the va content increases crystallinity decreases until at 50 the eva is. Eva shows good barrier and stretch properties. This page shows summary ranges across both of them. 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 properties ethylene vinyl acetate is a flexible and transparent thermoplastic. Ethylene vinyl acetate copolymer emulsion. Emblem in packaging technology 2012. Ethylene vinyl acetate terpolymers eva mah are random copolymers of ethylene vinyl acetate and maleic anhydride produced by high pressure polymerization in tubular reactors.