Patent ID: 6524720
Filing Date: 2003-02-25
Classification: B29K,B32B,Y10S,Y10T

Abstract:
A thermoplastic multi-layer film comprising:(a) a core layer comprising high density polyethylene; (b) two intermediate layers, on opposite surfaces of the core layer, comprising a polymeric material selected from the group consisting of: i) polymeric adhesive; ii) ethylene/vinyl acetate copolymer; and iii) ethylene/alpha olefin copolymer; (c) two moisture barrier layers, each disposed on a respective intermediate layer, wherein the moisture barrier layers comprise a blend of propylene polymer or copolymer, and a hydrocarbon resin comprising a thermoplastic resin of low molecular weight made from relatively impure monomers that are derived from coal-tar fractions or petroleum distillates; and (d) two outer layers, each disposed on a respective moisture barrier layer, wherein the outer layers comprise propylene polymer or copolymer, polybutene, or blends thereof.