SOLAR CELL REAR SURFACE PROTECTIVE SHEET

WIPO Patent Application WO/2015/068849

A1

The present invention provides a solar cell rear surface protective sheet that uses a fluorine resin film in the outermost layer thereof and that minimizes the occurrence of yellowing and cracking in the fluorine resin film. Specifically, the present invention is a solar cell rear surface protective sheet that is arranged on the rear surface side of a solar battery cell and that is characterized in that: (1) the solar cell rear surface protective sheet comprises at least a first resin layer and a second layer that are stacked in this order from the outermost layer, and an innermost layer that is on the opposite side from the outermost layer is attached to a solar battery cell when attaching the solar cell rear surface protective sheet to the solar battery cell; and (2) the first resin layer contains polyvinylidene fluoride, and the crystal structure within the polyvinylidene fluoride as determined from the absorbance observed in the infrared absorption spectrum comprises 30-70% of an α-type crystal and a remainder of a β-type crystal when the total of the α-type crystal and the β-type crystal is 100%.

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MORI KEITA (JP)
SARUWATARI MASATAKA (JP)
MAEDA DAISUKE (JP)

PCT/JP2014/079849

May 14, 2015

November 11, 2014

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TOYO ALUMINIUM KK (JP)

H01L31/049; B32B27/30; C08L27/16

WO2012172876A1	2012-12-20
WO2013069493A1	2013-05-16
WO2010122936A1	2010-10-28

SAEGUSA & PARTNERS (JP)
Patent business corporation 3 Edakuni [Hajime] patent firm (JP)

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