Polyester-containing biaxially-oriented polypropylene films
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United States of America Patent
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Aug 19, 2003
Grant Date -
Jan 24, 2002
app pub date -
Mar 7, 2001
filing date -
Jun 7, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Polyester-containing multilayer biaxially-oriented polypropylene films are provided. According to the invention, a two- or three-layer polyester-containing cap layer is bonded to a monoaxially oriented polypropylene core, followed by orientation of the resulting composite in a direction transverse to the direction of orientation of the core layer. At least one tie layer is interposed between the core and the polyester. Advantageously, the polyester contains silicone fluid as a processing aid.
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