Title:
太陽電池裏面保護膜用積層ポリエステルフィルム
Document Type and Number:
Japanese Patent JP5102392
Kind Code:
B2
Abstract:
In a laminated polyester film for solar cell backsheets, which includes a surface layer (A) and a substrate layer (B), the surface layer (A) is made of a polyester composition including 10 to 30 wt% of rutile-type titanium dioxide particles and 70 to 90 wt% of a polyester, the substrate layer (B) is made of a polyester composition including 0.1 to 4 wt% of rutile-type titanium dioxide particles and 96 to 99.9 wt% of a polyester, the substrate layer (B) has a thickness of 70% to 97% of the total film thickness, the weight average molecular weight and COOH end group concentration of polyester in the laminated film are 47000 to 65000 and 6 to 25 eq/ton, respectively, and the average content of rutile-type titanium dioxide particles in all layers of the laminated film is 3 to 8 wt%. As a result, a laminated polyester film for solar cell backsheets, which has excellent weatherability and hydrolysis resistance and is capable of maintaining strength over a long period of time, is provided.
Inventors:
Naoko Matsumura
Atsushi Koyamamatsu
Atsushi Koyamamatsu
Application Number:
JP2011507200A
Publication Date:
December 19, 2012
Filing Date:
March 30, 2010
Export Citation:
Assignee:
Teijin DuPont Films Co., Ltd.
International Classes:
H01L31/042; B32B27/36
Domestic Patent References:
| JP2009012454A | 2009-01-22 | |||
| JP2008036823A | 2008-02-21 | |||
| JP2009046630A | 2009-03-05 | |||
| JP2002100788A | 2002-04-05 | |||
| JP2007129204A | 2007-05-24 |
Foreign References:
| WO2005026241A1 | 2005-03-24 | |||
| WO2007063860A1 | 2007-06-07 | |||
| WO2007007882A1 | 2007-01-18 |
Attorney, Agent or Firm:
Taro Tameyama