Low Shrink Polyester Films and Method of Making

Abstract: a method for making low shrink polyester films wherein the films are arranged in stacks, tentered, heat treated, and relaxed in unison. also, polyester films produced by such method.

Inventor(s): John P. Purcell, James B. Svacha, Stephen A. Johnson, Timothy J. Lindquist, Grant F. Tiefenbruck, Chad R. Wold

CPC Classification: B29C55/16 (SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms ; making laminated products by combining previously unconnected layers which become one product whose layers will remain together - ))

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