Formable films, laminate structures, and related methods
Formable films are provided that include one or more biaxially-oriented polyethylene terephthalate layers. The formable films include a metaphase with a metaphase transition of about 180° C. to 200° C. as measured by differential scanning calorimetry (DSC). The formable films further include a molded volume of greater than 200%. Laminate structures including the formable films and processes for producing and using the formable films and laminate structures are also provided.
1. A process for producing a packaging, comprising:
providing a laminate structure including
a film having one or more biaxially-oriented polyethylene terephthalate homopolymer layers, the film including a metaphase configured to increase a property of the film selected from the group consisting of tensile strength, drawability, thermoformability, and combinations thereof, and
one or more additional layers laminated to the one or more biaxially-oriented polyethylene terephthalate layers; and
cold forming the laminate structure into a desired shape.
2. The process of claim 1 , wherein the one or more biaxially-oriented polyethylene terephthalate layers of the laminate structure comprises a single biaxially-oriented polyethylene terephthalate layer, and wherein the one or more additional layers of the laminate structure comprises an aluminum foil layer laminated to the single biaxially-oriented polyethylene terephthalate layer and a polyvinyl chloride layer laminated to the aluminum foil layer.
3. The process of claim 1 , wherein the one or more biaxially-oriented polyethylene terephthalate layers of the laminate structure comprises a first biaxially-oriented polyethylene terephthalate layer and a second biaxially-oriented polyethylene terephthalate layer, and wherein the one or more additional layers of the laminate structure comprises an aluminum foil layer interposed between the first biaxially-oriented polyethylene terephthalate layer and the second biaxially-oriented polyethylene terephthalate layer.
4. The process of claim 1 , further comprising the step of sealing the laminate structure to a lid subsequent to cold forming the laminate structure.
5. The process of claim 4 , wherein the lid is comprised of an aluminum foil.