EVA | Extrusion
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EVA Full Form:
What is EVA?
The copolymer of ethylene and vinyl acetate is called ethylene-vinyl acetate (EVA), also known as poly (ethylene-vinyl acetate) (PEVA). Vinyl acetate typically makes up 10 to 40% of the total weight, with the rest being ethylene. EVA copolymer comes in three varieties, each with a unique vinyl acetate (VA) composition and intended application. It is a very elastic substance that may be used in the same ways as other thermoplastics. The substance is UV radiation resistant, stress-crack resistant, and tough at low temperatures.
A thermoplastic elastomeric material with a medium proportion of vinyl acetate (VA) (between 4 and 30%), the thermoplastic ethylene-vinyl acetate copolymer, or EVA copolymer, is based on this principle. It is not vulcanized, although it does resemble rubber or plasticized polyvinyl chloride, especially at the higher end of the range. EVA polymers, whether filled or unfilled, are robust and exhibit favorable low temperature properties. Materials with about 11% VA are used to make hot melt adhesives.
The EVA copolymer with a high VA content (above 60%) is referred to as "ethylene-vinyl acetate rubber."EVA is one of the materials that is usually referred to as foam rubber or expanded rubber. Ski boots and bicycles, among other pieces of sporting equipment, both use EVA foam as padding. There are many other uses of EVA as well.
How EVA is made?
For instance, the ethylene-vinyl acetate copolymer is produced when ethylene and vinyl acetate are copolymerized together using free radical catalysts under pressure (EVA). Many different grades are manufactured using vinyl acetate with a weight percentage between 5 and 50%. The copolymer of ethylene and vinyl acetate is called ethylene-vinyl acetate (EVA). EVA is an improvement over pure polyethylene.
The EVA is used for padding various sports material. Here are some of them-