Title:
POLYPROPYLENE FILM FOR CAPACITOR
Document Type and Number:
Japanese Patent JPH11162779
Kind Code:
A
Abstract:
To provide a polypropylene film for supplying a capacitor with high maintenance, by reducing electrical insulation defect, making dielectric breakdown strength excellent, and reducing the change of an electrostatic capacity with lapse of time.
A two-axial orientation polypropylene film having at least one resin layer in which more than one kind of resin selected from oil resin which does not substantially include any double bond or polar group, and terpene resin which does not substantially include any double bond or polar group which is 5-50 by weight is mixed with polypropylene resin which is 100 by weight, is provided. The center line mean surface roughness of at least one face of the film is more than 0.03 μm and 0.5 μm or less.
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Inventors:
UEDA TAKASHI
TANAKA SHIGERU
NAGAI ITSUO
TANAKA SHIGERU
NAGAI ITSUO
Application Number:
JP32583097A
Publication Date:
June 18, 1999
Filing Date:
November 27, 1997
Export Citation:
Assignee:
TORAY INDUSTRIES
International Classes:
C08J5/18; B29C55/14; B29D7/01; B32B27/32; H01G4/18; B29K23/00; B29L7/00; (IPC1-7): H01G4/18; B29C55/14; B32B27/32; C08J5/18
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