Patent ID: 6420046
Filing Date: 2002-07-16
Classification: B29C,B32B,Y10T

Abstract:
A multilayer film comprising:a) a core layer comprising a polymer selected from the group consisting of nylon 6, nylon 66, nylon 6,66, and polyamide elastomer; b) first and second intermediate layers, each disposed on a respective opposite side of the core layer, comprising polymeric adhesive; c) a first outer layer, disposed on the first intermediate layer, comprising ethylene/alpha olefin copolymer having a density less than 0.940 grams/cubic centimeter; and d) a second outer layer, disposed on the second intermediate layer, comprising a heat sealable polymer selected from the group consisting of i) ethylene/alpha olefin copolymer having a density less than 0.921 grams/cubic centimeter, ii) ethylene/vinyl acetate copolymer, iii) ethylene/alkyl (meth)acrylate copolymer, iv) ethylene/(meth)acrylic acid copolymer, and v) ionomer; wherein the film has i) a tear propagation/mil value (ASTM D 1938) of at least 0.45 pound-inches/mil in the longitudinal direction, and at least 0.45 pound-inches/mil in the transverse direction, and ii) an instrumented impact /mil value (ASTM D 3763-95a) of at least 0.5 joules/mil.