BIAXIALLY ORIENTED POLYPROPYLENE FILM

Title:

BIAXIALLY ORIENTED POLYPROPYLENE FILM

Document Type and Number:

WIPO Patent Application WO/2015/146894

Kind Code:

A1

Abstract:

[Problem] To provide a biaxially oriented polypropylene film exhibiting superior voltage resistance and reliability at high temperatures when used in a high voltage capacitor, and having a storage elastic modulus that is optimal for use in said capacitor and has low temperature dependence. [Solution] A biaxially oriented polypropylene film in which, in a solid viscoelasticity measurement, the relationship of the storage elastic modulus (E'23) at 23˚C in the film width direction and the storage elastic modulus (E'125) at 125˚C satisfies (E'125)/(E'23)>0.2.

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Inventors:

IMANISHI YASUYUKI (JP)
OKADA KAZUMA (JP)
OHKURA MASATOSHI (JP)
KUMA TAKUYA (JP)

Application Number:

PCT/JP2015/058699

Publication Date:

October 01, 2015

Filing Date:

March 23, 2015

Export Citation:

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Assignee:

TORAY INDUSTRIES (JP)

International Classes:

C08J5/18; B29C55/12; B32B15/085; H01G4/18; B29K23/00; B29L7/00

Foreign References:

JPS4856281A	1973-08-07
JPH0873529A	1996-03-19
JPH10156940A	1998-06-16

Other References: