FILM FOR FILM CAPACITORS, METAL LAMINATE, FILM CAPACITOR, POWER CONTROL UNIT, ELECTRIC VEHICLE, AND ELECTRIC AIRCRAFT

WIPO Patent Application WO/2023/042905

A1

This film for film capacitors has two resin layers of different thicknesses, wherein, letting resin layer A be the layer with the smaller thickness and resin layer B be the layer with the larger thickness, the resin layer A is present on at least one side of the resin layer B. In addition, the film for film capacitors has an XA, which is determined using formula (i) from the atomic fractions for H, C, S, Si, N, and O in the resin layer A, of 0.050-0.80; has a loss tangent measured at 10 kHz and 23°C of not more than 0.50%; and satisfies at least one of conditions 1 and 2. Formula (i) XA = (atomic fraction for C + atomic fraction for N + atomic fraction for S + atomic fraction for Si)/(atomic fraction for H + atomic fraction for O). Condition 1: The melting point measured by DSC is at least 180°C. Condition 2: The glass transition temperature measured by DSC is at least 130°C and not more than 370°C.　Provided is a film for film capacitors that has a high heat resistance and self-healing performance and that can reduce the decline in properties induced by heating when used in a capacitor.

TATSUKI TOSHIUMI (JP)
OHKURA MASATOSHI (JP)

PCT/JP2022/034715

March 23, 2023

September 16, 2022

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TORAY INDUSTRIES (JP)

B32B27/00; B32B15/08; C08J7/04; H01G4/32

WO2010004700A1	2010-01-14
WO2007080757A1	2007-07-19

JPH04219236A	1992-08-10
JP2004090551A	2004-03-25
JP2014118417A	2014-06-30
JP2021154734A	2021-10-07
JP2007300126A	2007-11-15
JP2018163950A	2018-10-18

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