| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a multi-layer back sheet for a photovoltaic module with improved permeation suppression effect against steam and oxygen. <P>SOLUTION: A multi-layer back sheet 1 for a photovoltaic module has a first outer layer 2, a second outer layer 3, and at least one of inner layers 4 and 5 which are positioned between the outer layers 2 and 3 to form a barrier against steam and/or oxygen. All the layers 2, 3, 4, and 5 consist of high molecules. In the multi-layer back sheet 1 for the photovoltaic module, at least one of the two outer layers 2 and 3 includes polyamide, and at least one of the inner layers 4 and 5 is made of high molecules which are not fluorine high molecules and do not include polyethylene. The inner layers 4 and 5 part of which is made of polyester which is aromatic are used only by being combined with at least one outer adhesive acceleration layer 6 made of an ester amide block copolymer. <P>COPYRIGHT: (C)2012,JPO&INPIT |
