Process for the preparation of biaxially extended polyester film
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United States of America Patent
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May 26, 1998
Grant Date -
N/A
app pub date -
Dec 12, 1996
filing date -
Dec 13, 1995
priority date (Note) -
Expired
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Abstract
A biaxially extended polyester film comprising light calcium carbonate particles, spherical silica particles and .gamma.- or .delta.-alumina particles or a mixture thereof treated with a silane coupling agent prepared by the inventive process possesses excellent surface and physical properties.
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