POLYESTER FILM AND METHOD FOR MANUFACTURING SAME, SOLAR BATTERY BACK SHEET, AND SOLAR BATTERY MODULE

WIPO Patent Application WO/2013/027543

A1

The present invention provides a polyester film which satisfies a stress heat resistant coefficient f(125)≥3, which has a wet thermo retention rate (= 100 × S(120)/S(0)) of at least 30%, which has excellent resistance to hydrolysis and also excellent heat resistance under dry thermo, and which has a mechanical strength that is maintained in a stable manner, and the present invention also provides a method for manufacturing the polyester film [f(125) is the value obtained by substituting t = 125°C in the approximation f(t); t is the thermo temperature [°C]; f(t) is an approximation to a straight line obtained by linear approximation by the least squares method of the values plotted from the relationship between the thermo temperature t and the logarithm log T(t) of the time T at which the breaking stress is 50% when t = 150, 160, 170 and 180; T(t) is the time (hr) at which the maximum stress in a tensile test after thermo processing (temperature t, 0% RH) is 50% prior to thermo processing; S(120) is the breaking elongation (%) after the elapse of 100 hours at 120°C, 100% RH; and S(0) is the breaking elongation (%) before the aforementioned elapse of time].

HASHIMOTO KIYOKAZU (JP)
ARITOSHI YOHEI (JP)

PCT/JP2012/069362

February 28, 2013

July 30, 2012

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FUJIFILM CORP (JP)
HASHIMOTO KIYOKAZU (JP)
ARITOSHI YOHEI (JP)

H01L31/042; C08J5/18; H01M14/00

JP2011207986A	2011-10-20
JP2011091303A	2011-05-06

NAKAJIMA, Jun et al. (JP)
Nakajima 淳 (JP)

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