Biaxially oriented polyester film
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United States of America Patent
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Jan 12, 1999
Grant Date -
N/A
app pub date -
Oct 29, 1996
filing date -
Oct 30, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A biaxially oriented polyester film consisting essentially of a polyester resin, polytetrafluoroethylene resin particles having an average particle diameter of 3 to 8 .mu.m in an amount ranging from 0.3 to 0.6% by weight based on the weight of the polyester resin, and a polyacrylate dispersant in the amount 0.05 to 5 wt % based on the weight of polytetrafluoroethylene particles. The film possesses excellent surface properties, e.g., abrasion resistance, scratch resistance, transparency, void resistance, surface smoothness, slurry stability, running property and dielectric strength.
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