Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Layered – stratified traversely of length – or multiphase...
Reexamination Certificate
2007-06-12
2007-06-12
Johnson, Christina (Department: 1732)
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Layered, stratified traversely of length, or multiphase...
C264S210100, C264S210700, C264S211120, C264S235800, C264S037320, C264S290200, C264S911000, C264S918000, C264S920000
Reexamination Certificate
active
10702945
ABSTRACT:
Invention relates to a process for producing a single-layer or multilayer film by extrusion or coextrusion, biaxial orientation, and heat setting based on crystallizable thermoplastics whose principal constituent is a crystallizable thermoplastic having a standard viscosity SV (DCA) of from 600 to 1000. The thermoplastic is mixed prior to extrusion or coextrusion with 50% by weight (based on the total weight of all thermoplastics) of a secondary thermoplastic having a standard viscosity SV (DCA) of more than 900 to 1500, the standard viscosity SV (DCA) of the two thermoplastics differing by at least 100 units. The secondary thermoplastic is a byproduct or waste product from the production of PET plastic bottles or originates from recycled PET bottles.
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Kern Ulrich
Kliesch Holger
Murschall Ursula
Mitsubishi Polyester Film GmbH
ProPat L.L.C.
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