US Patent 8079470 Heat sealable laminating film

A themolaminating film for receiving a blister portion in the construction of a reusable package is described. A base blister portion configured to receive some form of media or material is molded from a formable heat sealable polymer such as PETG. A film consisting of a first layer of an amorphous polyester such as APET for heat sealing to the PETG, a second layer of a polyester such as PET, and an adhesive layer is used to laminate a graphical paper based cover thereby allowing the laminated cover to be heat sealed to the blister portion. In a preferred embodiment, the PET and APET are preferably coextruded.