Expanded Vinyl Acetate
Vinyl acetate is the acetate ester of vinyl alcohol.
Expanded vinyl acetate. Dot id guide. While the eva foam does not contain any rubber is is commonly referred to as expanded rubber or foam rubber. The weight percent of vinyl acetate usually varies from 10 to 40 with the remainder being ethylene. Polyvinyl acetate pvac a synthetic resin prepared by the polymerization of vinyl acetate.
The eva copolymer which is based on a low proportion of va may be referred to as vinyl acetate modified polyethylene. Tests of its resilience elasticity under iso 8307 the ball rebound test show thatinfinergy achieves a rebound of over 57. Eva foam is used as padding in equipment for various sports such as ski boots hockey boxing mixed martial arts wakeboard boots and waterski boots. It also is used in adhesives.
In its most important application polyvinyl acetate serves as the film forming ingredient in water based latex paints. Eva is one of the materials popularly known as expanded rubber or foam rubber. Eva foam is a great option for cooler lids personal water craft surfboards stand up paddleboards or anywhere else you might want cushioned wet traction. Ethylene vinyl acetate also known as poly is the copolymer of ethylene and vinyl acetate.
Eva expanded vinyl acetate foam decking products have been become wildly popular due to the low cost great looks simple installation and comfort. Read more on this topic major industrial polymers. 1 acetoxyethylene ethenyl acetate ethenyl ethanoate vac vinyl acetate monomer vinyl ethanoate cas no. With softness and flexibility approaching elastomeric materials eva has good clarity and gloss barrier properties low temperature toughness stress crack resistance and ultraviolet uv resistance.
Ethylene vinyl acetate or eva material is an elasticized closed cell foam with rubber like softness and flexibility. This is therefore significantly higher than comparable particle foams such as expanded polypropylene epp at 30 ethylene vinyl acetate eva at 37 or expanded polyethylene epe at 50. Westlake specializes in ethylene vinyl acetate eva formulations with vinyl acetate content that has expanded up to 28 appropriate for use in thermoplastic extrusion film compounds and foam molding. Eva foam is also waterproof.
Eva mats will have a glossy appearance and are resistant to uv radiation and cracking. Since vinyl alcohol is highly unstable with respect to acetaldehyde the preparation of vinyl acetate is more complex than the synthesis of other acetate esters. Vinyl acetate c4h6o2 cid 7904 structure chemical names physical and chemical properties classification patents literature biological activities safety. The major industrial route involves the reaction of ethylene and acetic acid with oxygen in the presence of a palladium catalyst.