Patent ID: 6479138
Filing Date: 2002-11-12
Classification: B32B,Y10S,Y10T

Abstract:
A multilayer oriented heat shrinkable film comprising:a) a core layer comprising a linear random ethylene/styrene copolymer; and b) a first and second outer layer, comprising an olefinic polymer; wherein the film has:i) a Young's modulus of between 50,000 and 200,000 pounds per square inch in at least one of the longitudinal and transverse directions; ii) a free shrink of between 40% and 80% at 240Â° F. in at least one of the longitudinal and transverse directions; iii) a shrink tension of between 50 and 400 pounds per square inch at 240Â° F. in at least one of the longitudinal and transverse directions; and iv) a haze of less than 6; wherein the ethylene/styrene copolymer comprises between 65% and 85%, by weight of the copolymer, of styrene; andwherein the first and second outer layer each comprise an olefinic polymer selected from the group consisting of ethylene/alpha olefin copolymer, ethylene/vinyl acetate copolymer, ethylene/alkyl acrylate copolymer, ethylene/acrylic acid copolymer, ionomer, butylene homopolymer and butylene copolymer, multicomponent ethylene/alpha-olefin interpenetrating network resin, high density polyethylene, a blend of high density polyethylene and ethylene/vinyl acetate copolymer, and a blend of high density polyethylene and low density polyethylene.