Polyester packaging films producing a peelable seal
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United States of America Patent
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-
Sep 9, 2003
Grant Date -
Aug 9, 2001
app pub date -
Apr 2, 2001
filing date -
Feb 2, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A heat sealable packaging film producing a peelable seal is formed from a blend of 99 to 75 weight percent of a copolyester and 1 to 25 weight percent of an epoxy-containing impact modifying polymer. The copolyester has a diacid component of at least 50 mole percent terephthalic acid, naphthalenedicarboxylic acid, 1,4-cyclohexanedicarboxylic acid, or mixtures thereof and diol component of about 90 to 35 mole percent ethylene glycol and 10 to 65 mole percent of at least one of diethylene glycol or 1,4-cyclohexanedimethanol.
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