What is the difference between EVA and PVC?

EVA is 30% lighter than PVC – This gives the film a better yield and reduces shipping costs. EVA has excellent RF sealing properties – The same RF sealing equipment can be used with PVC and EVA, so there are no extra costs for re-tooling.

Is ethylene vinyl acetate strong?

Ethylene-vinyl acetate (EVA), also known as poly (ethylene-vinyl acetate) (PEVA), is the copolymer of ethylene and vinyl acetate. Both filled and unfilled EVA materials have good low temperature properties and are tough. The materials with approximately 11% VA are used as hot melt adhesives.

Is EVA hydrophilic?

Controlled release of APIs can be designed by the thickness of the ethylcellulose film which alters the diffusion path. EVA is a hydrophobic polymer which does not require the use of solvents or plasticizers for drug delivery. EVA has been used in a wide variety of applications and administration routes.

Is EVA a polyolefin?

EVA is a step up from straight polyethylene. They are both in the polyolefin family. Broadly speaking, there are three different types of EVA copolymer, which differ in the vinyl acetate (VA) content and the way the materials are used.

What’s the percentage of ethylene in vinyl acetate?

The weight percent of vinyl acetate usually varies from 10 to 40%, with the remainder being ethylene. There are three different types of EVA copolymer, which differ in the vinyl acetate (VA) content and the way the materials are used.

How is ethylene vinyl acetate ( EVA ) copolymer safety data sheet?

Ethylene Vinyl Acetate (EVA) Copolymer Safety Data Sheet International Polymers Company SAFETY DATA SHEET according to Regulation (EC) No. 1272/2008, Regulation (EC) No.1907/2006 Ethylene vinyl acetate copolymer, rev.1 01/2013 Page 2 Classification according to Regulation 1272/2008/EC (CLP)

How are vinyl acetate copolymers used in adhesives?

Ethylene–vinyl acetate copolymers (EVA), containing from 25 to 50% vinyl acetate, are used in adhesives. The vinyl acetate contributes tack, solubility, improved adhesion to polar surfaces and low temperature flexibility. The copolymers are produced in a wide range of molecular weights and corresponding melt indices (< 10 to 500).

Which is more flexible PVC or vinyl acetate?

EVA is low-density polyethylene polymerised with vinyl acetate. It has high mechanical strength, and flexibility at low temperatures, greater resilience than PVC and greater flexibility than LDPE, with higher permeability to water vapour and gases.