POLYESTER FILM FOR PROTECTING REAR SURFACE OF SOLAR CELL
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United States of America Patent
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Issued Date -
May 2, 2013
app pub date -
Apr 4, 2011
filing date -
Jul 6, 2010
priority date (Note) -
Abandoned
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Abstract
A polyester film for protecting a rear surface of a solar cell contains a white polyester film layer containing a polyester composition containing 85 to 96% by weight of polyethylene terephthalate that is polymerized with an antimony compound and/or a titanium compound as a polycondensation catalyst and 4 to 15% by weight of rutile type titanium oxide particles, the polyester composition containing, based on the molar number of the total dicarboxylic acid component constituting the polyethylene terephthalate, 10 to 40 millimole % of a particular phosphoric acid compound and 2 to 50 millimole % in total in terms of metal elements of antimony element and/or titanium element derived from the polycondensation catalyst.
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