Biaxially oriented polyester film
AssigneeSkc Co., Ltd.
InventorsKwang-Hyung Lee, Seung-Soo Woo
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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.
Claims2
A biaxially oriented polyester film consisting essentially of a polyester resin, polytetrafluoroethylene resin particles having an average particle diameter ranging from 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 employed for the preparation of the polyester film and a polyacrylate dispersant having the formula of R.sub.1 --(CH.sub.2 CHCOOM).sub.n in an amount ranging from 0.05 to 5.0 wt % based on the weight of the polytetrafluoroethylene resin employed, wherein R.sub.1 represents a C.sub.9-32 alkyl group, M is an alkali metal or an ammonium group and n is 5-20.
Dependencies are inferred from the claim text.