Amorphous nylon copolymer and copolyamide films and blends
AssigneeViskase Corporation
InventorStephen J. Vicik
Life of this patent
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Abstract
Orientable single and multilayer thermoplastic flexible films utilizing blends comprising an amorphous nylon copolymer such as nylon 6I/6T and a nylon copolyamide having a melting point of at least about 145.degree. C. having improved processability, shrinkage and optical properties.
Claims12
A thermoplastic, heat shrinkable flexible film, comprising a blend of an amorphous nylon 6I,6T copolymer having no measurable melting point (less than 0.5 calories per gram) or no heat fusion as measured by differential scanning calorimetry, which is present in an amount of from about 10 to about 50 weight percent of said blend, and a copolyamide having a melting point of at least about 145.degree. C. which is selected from the group consisting of nylon 6/12 and nylon 6/66, wherein said film has a shrinkage value in at least one direction of at least 5% at 90.degree. C.
Dependencies are inferred from the claim text.