Title:
POLYPROPYLENE-BASED BIAXIALLY ORIENTATED FILM FOR CONDENSER
Document Type and Number:
Japanese Patent JPH08157613
Kind Code:
A
Abstract:
PURPOSE: To prepare a film providing an oil impregnated condenser having a low whole ash content, a low element content of Mg, etc., surface roughness in a fixed range, excellent in oil impregnation properties and low in reduction of electrical insulating performances.
CONSTITUTION: This polypropylene-based biaxially orientated film has ≤50ppm whole ash content contained in the film, ≤20ppm total of Mg, Ca, Al, Ti and Cl, surface roughness at least one side shown by central line average roughness Ra of ≥0.08μm and ≤0.08μm. The film comprises at least two layers and has ≥50ppm content of total of Mg, Ca, Al, Ti and Cl contained in the rough face layer, and has a ratio of the thickness of a rough face layer to the whole thickness of 2-30%.
Inventors:
KATO HIROYUKI
KOTANI YOSHINORI
TANAKA MEGUMI
KOTANI YOSHINORI
TANAKA MEGUMI
Application Number:
JP33126694A
Publication Date:
June 18, 1996
Filing Date:
December 07, 1994
Export Citation:
Assignee:
TORAY INDUSTRIES
International Classes:
C08J5/18; B29C55/12; B32B27/00; B32B27/20; H01G4/18; B29K23/00; B29K105/16; B29L7/00; B29L31/34; (IPC1-7): C08J5/18; B29C55/12; B32B27/00; B32B27/20; H01G4/18
Attorney, Agent or Firm:
Ban Toshimitsu