| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a backsheet for a solar cell that is excellent in heat resistance, steam barrier properties, and weatherability, and is less apt to undergo hydrolysis even when used outdoors for long. <P>SOLUTION: The backsheet for a solar cell comprises a resin layer (B) as a base material layer, a resin layer (A) laminated on one side of the resin layer (B), a resin layer (C) laminated on the other side of the resin layer (B), and a steam barrier layer D laminated on an external surface of the resin layer A or C, between the resin layers A, B, or between the resin layers B, C, the thickness (H<SB>A</SB>) of the resin layer A, the thickness (H<SB>B</SB>) of the resin layer B, and the thickness (H<SB>C</SB>) of the resin layer C satisfying the following expressions (1) and (2). The backsheet for the solar cell has a dimensional change ratio of±1% or below through 30-minute standing at 150°C and has a reflectance of 50% or higher as measured with light having wavelengths of 400-1,400 nm. expression (1): 0.5≤H<SB>A</SB>/H<SB>C</SB>≤1.3, expression (2): 0.4≤(H<SB>A</SB>+H<SB>C</SB>)/H<SB>B</SB>≤2.4. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
