| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a front surface protective sheet for a solar battery, used as a protective member of a cell for a solar battery, having a resin layer with good balance between flexibility, heat resistance and transparency to prevent deterioration in moisture proof performance of the front surface protective sheet due to a falling object or the like, having transparency and high long-term moisture resistance and weather resistance at the same time, and effective in reduction in weight and improvement in durability of a solar battery. <P>SOLUTION: The front surface protective sheet for a solar battery is obtained by laminating a weather resistant layer (A) and a moisture proof layer (B) with a flexible layer (C) interposed therebetween, the flexible layer containing an ethylene-α-olefin random copolymer (C-1) satisfying the following condition (1) and an ethylene-α-olefin block copolymer (C-2) satisfying the following condition (2). (1) A crystal melting enthalpy measured at a heating rate of 10°C/min by differential scanning calorimetry is 0 to 70 J/g. (2) A crystal melting peak temperature and a crystal melting enthalpy, which are measured at a heating rate of 10°C/min by differential scanning calorimetry, are 100°C or more and 5 to 70 J/g, respectively. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
