| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a polymer sheet which controls a drop of white pigment powder, shows a high reflectance, controls a separation between each respective layers of back sheets with time under wet heat environment, and controls a separation from a sealing material with time under wet heat environment when stuck on the solar cell module. <P>SOLUTION: The polymer sheet has a transparent polymer support 16; a first polymer layer 1 arranged on one surface of the transparent polymer support 16 and containing the white pigment; a third polymer layer 3 arranged on the opposite surface of the transparent polymer support and containing a silicone-based polymer and the pigment; and a fourth polymer layer 4 arranged on the third polymer layer and containing a silicone-based polymer or a fluoropolymer wherein the volume ratios of the white pigment in the first polymer layer 1 and the third polymer layer 3 are 15-50% and 15-30% respectively, and the first polymer layer 1 and the third polymer layer 3 are 5-10 μm thick respectively. <P>COPYRIGHT: (C)2013,JPO&INPIT |
