| 摘要 |
A flat type capacitor-use polypropylene film having a Ad(thickness determined by micrometer method-thickness determined by weighing method) of 0.05-0.2 mum and a lengthwise shrinkage dimensional change rate of 3% or less, or a flat type capacitor-use polypropylene film having a Deltad of 0.1-0.3 mum and a lengthwise F5 value of 50 MPa or more, and a flat type capacitor using it. A film excellent in handling ability in a capacitor element winding process is obtained, and a small, a large-capacity flat type capacitor excellent in withstand voltage characteristics such as self-recovering property, and used suitably under a high rated voltage, is obtained.
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