Process Economics Program Report 155A
Ethylene/Vinyl Acetate Copolymers
Published: January 1992
Ethylene-vinyl acetate copolymers (EVAs) contain 5-40 weight percent vinyl acetate. Their uses include film production, hot melt adhesive formulation, coatings, extrusion and coextrusion, blow molding, lamination, injection molding, wire and cable, and resin modification. They are produced by the high-pressure continuous bulk copolymerization processes using either autoclave or tubular reactors.
This report reviews the technology and evaluates the process economics for producing EVAs with a high-pressure autoclave reactor process and a high-pressure tubular reactor process. It also indicates the properties of the various grades of EVAs and the effect of the copolymerization processes on product properties.
Besides present and future EVA producers, this report can assist high-pressure polyethylene manufacturers in their evaluation to include EVAs in their product mix. EVA users can also benefit from the discussion on the economics of manufacturing the various grades of EVAs.