Nipoflex 631 Ethylene vinyl acetate copolymer Tosoh Ethylene co-terpolymers - solid (EVA, EMA) >> Ethylene Vinyl Acetate, EVA ADHESIVE >> Hot-melt Nipoflex 631. Ethylene vinyl acetate copolymer resin. Used in hot melt adhesive: Case and carton sealing, plywood labels. Having outstanding clarity, gloss and weather resistance, Nipoflex® resin offers flexibility over wide temperature ranges, as well as high impact strength, elasticity and resistance to flex and environmental stress cracking Ethylene vinyl acetate copolymer resin. Used in hot melt adhesives. Possesses clarity, gloss and weather resistance. Offers flexibility over wide temperature ranges, as well as high impact strength, elasticity and resistance to flex and environmental stress cracking.