BIAXIALLY ORIENTED ROUGH SURFACE POLYESTER FILM
PROBLEM TO BE SOLVED: To provide a rough surface biaxially oriented polyester film for an electric insulator and manufacturing a capacitor with excellent processability in addition to many excellent performances. SOLUTION: The biaxially oriented rough surface polyester film contains particles. Surfa...
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Zusammenfassung: | PROBLEM TO BE SOLVED: To provide a rough surface biaxially oriented polyester film for an electric insulator and manufacturing a capacitor with excellent processability in addition to many excellent performances. SOLUTION: The biaxially oriented rough surface polyester film contains particles. Surface roughness Rz of at least one surface of the film is larger than 1.0μm and Ra is larger than 0.1μm. A withstand voltage of AC is larger than 220kV/mm and a withstand voltage of DC is larger than 500kV/mm. Further, a partition transferring based on an added particle amount in a volume of 100cm of the polyester is 18μS/cm or less. |
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