Patent ID: 6964816

Claim:
A multilayered structure comprising: a) a first layer of polyester, wherein said polyester is selected from the group consisting of a homopolymer or copolymer of ethylene terephthalate, ethylene naphthalate and blends thereof; b) a second layer of an adhesive; c) a third layer comprising a nylon or nylon blend, wherein said third layer is a bend between about 100% (wt.) to about 71% (wt.) of a nylon selected from the group consisting of nylon 4,6 (poly(tetramethylene adipamide)), nylon 6 (polycaprolactam), nylon 6,6 (poly(hexamethylene adipamide)), nylon 6.9 (poly(hexamethylene nonanediamide)), nylon 6,10 (poly(hexamethylene sebacamide)), nylon 6,12 (poly(hexamethylene dodecanediamide)), nylon 6/12 (poly(caprolactam-co- dodecanediamide)), nylon 6,6/6 (poly(hexamethylene adipamide-co-caprolactam)), nylon 11(polyundecanolactam), nylon 12 (polyauryllactam) and alloys or mixtures thereof; and between about 0% (wt.) to about 29% (wt.) of an amorphous nylon; said first layer, said second layer and said third layer are formed into a flexible film by a coextrusion process such that said first layer, said second layer and said third layer have a combined thickness of 10 mils or less; and wherein said film is nonoriented and has a heat shrinkage value of less than about 5% in the machine direction at 90° C. and less than about 5% in the transverse direction at 90° C.