| 摘要 |
PROBLEM TO BE SOLVED: To provide a metallized polypropylene film which has improved dielectric breakdown resistance can be made a capacitor which controlled the decrease in electrostatic capacity and the increase in dielectric loss tangent caused by the generation of corona during the use for a long period at high temperatures without using an insulating oil. SOLUTION: In a metallized polypropylene film in which a metal layer is formed at least on one side, the thermal dimensional change rate in the longitudinal direction of the film generated during a temperature increasing process from 30 deg.C is regulated to be 0-2% at 120 deg.C), the isotacticity of polypropylene of the film is kept 98-98.5%, and an isotactic pentad ratio is controlled to be at least 99%. |
