Patent ID: 7981474

Claim:
A process for making a multilayer film having comprising: a) providing an intermediate layer of a polyester having at least two planar directions and a first and second surface, wherein the intermediate layer has a shrinkage of less than about 1% in each planar direction when held for 15 minutes at 150° C. measured in accordance with ASTM 2305-02; b) applying a first outer layer of semi-crystalline fluoropolymer, the first outer layer capable of bonding to the first surface of the intermediate layer and having a tensile modulus of less than 100,000 psi; c) applying a second outer layer of an olefinic polymer to the second surface, the olefinic polymer capable of bonding to the second surface of the intermediate layer; and d) bonding the layers to form the multilayer film through the application of energy, mechanical forces or both.