Patent ID: 8178210

Claim:
A multilayer, biaxially oriented, thermoplastic film comprising: (A) a first outer layer comprising at least one member selected from the group consisting of polyester homopolymer and polyester copolymer; (B) a second outer layer comprising at least one member selected from the group consisting of ethylene homopolymer, ethylene copolymer, propylene homopolymer, and propylene copolymer; and (C) a first core layer comprising ethylene/vinyl alcohol copolymer; and wherein the multilayer film has a modulus, according to ASTM D882, of at least 6,000 kg/cm 2 in at least one direction, with the proviso that the multilayer film does not have a core layer containing at least 50 weight percent, based on layer weight, of at least one member selected from the group consisting of polyamide and polyester.