Patent ID: 6858313

Claim:
A multilayer film comprising: a) a core layer comprising an amorphous polyamide; b) two intermediate layers, disposed on opposite surfaces of the core layer, comprising a semicrystalline polyamide; C) two adhesive layers, each disposed on a surface of the respective intermediate layer, comprising a polymeric adhesive; and d) two outer layers, each disposed on a surface of a respective adhesive layer, comprising a material selected from the group consisting of amorphous polyamide, semicrystalline polyamide, ethylene/alpha olefin co-polymer, propylene homopolymer, and propylene/alpha olefin copolymer; wherein the film has a total thickness of between 0.5 and 10 mils; wherein the film exhibits a free shrink of less 5% than the longitudinal direction, and less than 5% in the transverse direction, at 180° F., and wherein said multilayer film further comprises an additive selected from the group consisting of anti-oxidants, processing aids, fillers, radiation stabilizers, anti-static agents, slip agents, anti-block agents, pigments, dyes and elastomers.