Patent ID: 6214477
Filing Date: 2001-04-10
Classification: B32B,Y10S,Y10T

Abstract:
A heat shrinkable multilayer film comprisinga) a first layer, having two major surfaces, comprising polyvinyl chloride; andb) a second layer, adhered to a first major surface of the first layer, comprising a material selected from the group consisting of:i) anhydride functionalized polyolefin,ii) ethylene/vinyl acetate copolymer having a vinyl acetate content of between 10% and 35% by weight of the ethylene/vinyl acetate copolymer,iii) ethylene/alkyl acrylate copolymer having an alkyl acrylate content of between 10% and 30% by weight of the ethylene/alkyl acrylate copolymer,iv) ethylene/alkyl methacrylate copolymer having an alkyl methacrylate content of between 10% and 30% by weight of the ethylene/alkyl methacrylate copolymer,v) ethylene/acrylic acid copolymer having an acrylic acid content of between 10% and 30% by weight of the ethylene/acrylic acid copolymer,vi) ethylene/methacrylic acid copolymer having a methacrylic acid content of between 10% and 30% by weight of the ethylene/methacrylic acid copolymer, andvii) ionomer;wherein the film has a shrink tension of between 100 and 300 psi in at least one of the machine and transverse directions at 200.degree. F., and a free shrink of between 25% and 65% in at least one of the machine and transverse directions at 220.degree. F.