Biaxially oriented polyester film
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United States of America Patent
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Oct 7, 1997
Grant Date -
N/A
app pub date -
Dec 12, 1996
filing date -
Dec 13, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A biaxially oriented polyester film which contains 0.01 to 5 wt % of zinc oxide having an average particle diameter ranging from 0.01 to 5 .mu.m has improved transparency, UV light shielding ability and surface properties, and it is especially useful as wrapping materials for food, labels, window coating films, photoresists and the like. The zinc oxide may be optionally pretreated with a silane coupling agent of formula (I): R.sup.1 --R.sup.2 --Si--(OR.sup.3).sub.3 (I) wherein, R.sup.1 is a methacryl ##STR1## an epoxy ##STR2## or an amino (--NR'.sub.2) group wherein each R' is independently a hydrogen or an alkyl radical; R.sup.2 is a C.sub.1-5 alkylene group; and R.sup.3 is a C.sub.1-3 alkyl group.
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