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.
Eva ethylene vinyl acetate properties.
Emblem in packaging technology 2012.
Ethylene vinyl acetate copolymer emulsion.
There are three different types of eva copolymer which differ in the vinyl acetate va content and the way the materials are used.
Ethylene copolymers top all thermoplastics middle and the entire database bottom.
It is an extremely elastic and tough thermoplastic of excellent clarity and gloss and with little odor.
This page shows summary ranges across both of them.
Ethylene vinyl acetate terpolymers eva mah are random copolymers of ethylene vinyl acetate and maleic anhydride produced by high pressure polymerization in tubular reactors.
Ethylene vinyl acetate eva is a random copolymer of ethylene and varying amounts of vinyl acetate va.
Eva shows good barrier and stretch properties.
For more specific values follow the links immediately below.
It is the basis of many hot melt adhesives when blended with a petroleum wax and a resin tackifier.
Also it imparts plastic like properties that enable wax to compete effectively with high quality polymeric coatings.
The properties are largely dependent on the molecular weight and the vinyl acetate content.
As the va content increases crystallinity decreases until at 50 the eva is.
1 the ethylene portion provides miscibility with ethylene copolymers while the vinyl acetate portion increases the.
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.
Ethylene vinyl acetate offers good low temperature flexibility.
Eva is used in several applications thanks to the varied properties it possesses.
The properties of eva include two common variations.
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.
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.
Eva ethylene vinyl acetate this copolymer resin can be used in adhesives sealants and coatings.
