Patent ID: 7569276

Claim:
A laminate comprising or produced from (a) a thermoformable film layer; (b) a second thermoformable structural film layer; (c) a heat sealable layer; and optionally (d) a barrier layer wherein the thermoformable film layer is disposed between the second thermoformable structural film layer and the heat sealable layer and comprises or is produced from a polymer composition, which comprises or is derived from at least 80% by weight polyethylene terephthalate polymer and wherein the thermoformable film layer has a first surface and a second surface and has less than 5% shrink factor upon exposure to boiling water for five seconds; the second thermoformable structural film layer has less than 5% shrink factor upon exposure to boiling water for five seconds and is disposed adjacent and substantially coextensive with the first surface; and the heat sealable layer is adjacent and substantially coextensive with the second surface and comprises or is made from a copolyester, ionomer, or an ethylene vinyl acetate copolymer, or coextruded combinations of two or more thereof.