Title:
BIAXIALLY STRETCHED POLYPROPYLENE FILM FOR CAPACITORS, METALLIZED FILM, AND FILM CAPACITOR
Document Type and Number:
WIPO Patent Application WO/2013/146367
Kind Code:
A1
Abstract:
A biaxially stretched polypropylene film for capacitors, which has projections on both surfaces and has a thickness (t1) of 1-3 μm. This biaxially stretched polypropylene film for capacitors satisfies all of the formulae (1)-(4) described below, if one surface of the film is taken as a surface A and the other surface of the film is taken as a surface B. Provided are: a biaxially stretched polypropylene film which exhibits excellent withstand voltage properties, security and reliability in applications as capacitors for high voltage, while ensuring stable element processability; a metallized film; and a film capacitor.
|Pa - Pb| ≥ 200 (1)
0.350 ≤ Pa/SRzA ≤ 0.700 (2)
500 nm ≤ SRzA ≤ 1,200 nm (3)
50 nm ≤ SRzB< 500 nm (4)
In this connection, Pa represents the number of projections per 0.1 mm2 of the surface A; Pb represents the number of projections per 0.1 mm2 of the surface B; SRzA represents the ten-point average roughness of the surface A; and SRzB represents the ten-point average roughness of the surface B.
Inventors:
NAKATSUKA TAKANORI (JP)
ASANO TETSUYA (JP)
SUGATA MASAMI (JP)
ASANO TETSUYA (JP)
SUGATA MASAMI (JP)
Application Number:
PCT/JP2013/057465
Publication Date:
October 03, 2013
Filing Date:
March 15, 2013
Export Citation:
Assignee:
TORAY INDUSTRIES (JP)
International Classes:
C08J5/18; B29C55/12; B32B15/085; H01G4/015; H01G4/18
Domestic Patent References:
WO2012002123A1 | 2012-01-05 |
Foreign References:
JP2011122142A | 2011-06-23 | |||
JP2011122143A | 2011-06-23 | |||
JPS5163500A | 1976-06-01 | |||
JP2001324607A | 2001-11-22 | |||
JP2011122143A | 2011-06-23 | |||
JP2011122142A | 2011-06-23 | |||
JP2007308604A | 2007-11-29 | |||
JP2008133446A | 2008-06-12 | |||
JPS62121704A | 1987-06-03 | |||
JP2869606B2 | 1999-03-10 | |||
JP2009542872A | 2009-12-03 |
Other References:
M. FUJIYAMA, JOURNAL OF APPLIED POLYMER SCIENCE, vol. 36, 1988, pages 985 - 1048
"New edition of Polymer Analysis Handbook", 1995, pages: 609 - 611
"New edition of Polymer Analysis Handbook", 1995, pages: 609 - 611
Attorney, Agent or Firm:
BAN Toshimitsu et al. (JP)
Toshimitsu Ban (JP)
Toshimitsu Ban (JP)
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