SOLAR BATTERY ENCAPSULANT AND SOLAR BATTERY MODULE

摘要

The present invention is to provide an encapsulating material for solar cell excellent in a balance among general properties such as transparency, flexibility, adhesiveness, heat resistance, appearance, crosslinking properties, electrical properties and calender moldability. To achieve the above object, the encapsulating material for solar cell comprising an ethylene/±-olefin copolymer satisfying the following requirements (a1) to (a4): Disclosed is an encapsulating material for solar cell containing an ethylene/±-olefin copolymer satisfying the following requirements (a1) to (a4): (a1) the content ratio of structural units derived from ethylene is from 80 to 90 mol% and the content ratio of structural units derived from ±-olefin having 3 to 20 carbon atoms is from 10 to 20 mol%; (a2) MFR is equal to or more than 2 g/10 minutes and less than 10 g/10 minutes as measured under the conditions of a temperature of 190 degrees centigrade and a load of 2.16 kg in accordance with ASTM D1238; (a3) the density is from 0.865 to 0.884 g/cm 3 as measured in accordance with ASTM D1505; and (a4) the shore A hardness is from 60 to 85 as measured in accordance with ASTM D2240.