POLYESTR FILM FOR CAPACITORS

Title:

POLYESTR FILM FOR CAPACITORS

Document Type and Number:

WIPO Patent Application WO/2002/045105

Kind Code:

A1

Abstract:

A polyester film for capacitors which is a biaxially oriented film made mainly of polyethylene-2,6-naphthalene- dicarboxylate and satisfying the relationship: -1.5% $m(F) RMD(150) $m(F) 0.0% wherein RMD(150) represents the rate of thermal strain of the film in machine direction (MD) at 150°C as defined based on the length of the film in MD at t°C, LMD(t), by the formula: RMD(T) = {[LMD(T) LMD(35)]/LMD(35)} x 100 (%) wherein RMD(T) is the rate of thermal strain of the film in MD at T°C. This film is excellent in insulating characteristics and is not lowered in the quality in fabricating, particularly hot pressing, thus being useful as a dielectric for capacitors.

Inventors:

FURUYA KOJI (JP)
KUSUME HIROSHI (JP)
HANDA MAKOTO (JP)

Application Number:

PCT/JP2001/010405

Publication Date:

June 06, 2002

Filing Date:

November 28, 2001

Export Citation:

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Assignee:

TEIJIN LTD (JP)
FURUYA KOJI (JP)
KUSUME HIROSHI (JP)
HANDA MAKOTO (JP)

International Classes:

H01G4/18; (IPC1-7): H01G4/18

Foreign References:

JPH11135358A

1999-05-21

Other References: