| 摘要 |
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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