Polyester/copolyester coextruded packaging film
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United States of America Patent
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-
Aug 23, 1988
Grant Date -
N/A
app pub date -
Jul 26, 1985
filing date -
Jul 26, 1985
priority date (Note) -
Expired
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Abstract
Multiple layer nonoriented heat sealable films are disclosed having a base substrate layer of poly(ethylene terephthalate) (polyester) or polyester copolymer and at least one heat sealable surface layer of a copolyester. The films are prepared by conventional cast or blown film coextrusion techniques.
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