Flat type capacitor-use polypropylene film and flat type capacitor using it
AssigneeToray Industries, Inc.
InventorsKimitake Uematsu, Isamu Moriguchi, Masahito Iwashita, Akira Oda
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Abstract
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 μm and a lengthwise shrinkage dimensional change rate of 3% or less, or a flat type capacitor-use polypropylene film having a Δd of 0.1-0.3 μm 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.
Claims6
A flat type capacitor-use polypropylene film comprising a resin with a melting point of 164 to 167° C. and having 1) a Δd, which is a difference between a thickness of said film determined by micrometer method and a thickness of said film determined by weighing method, of 0.1-0.3μm and 2) a lengthwise F5 value of 50 MPa or more, wherein the thickness of the film determined by the micrometer method is 4μm or less.
Dependencies are inferred from the claim text.