SOLAR BATTERY ENCAPSULANT AND SOLAR BATTERY MODULE

摘要

The purpose of the present invention is to provide a solar battery encapsulant excellent in characteristics such as transparency, flexibility, adhesiveness, heat resistance, appearance, crosslink characteristics, electrical characteristics, and calender formability. In order to achieve the purpose described above, provided is a solar battery encapsulant containing an ethylene-a-olefin copolymer that satisfies requirements (a1) to (a4). (a1) The content ratio of a constitutional unit derived from ethylene is 80 to 90 mol% while the content ratio of a constitutional unit derived from a-olefin having 3 to 20 carbon atoms is 10 to 20 mol%. (a2) MFR measured at 190°C under 2.16 kg load in accordance with ASTM D1238 is 2 g/10 min. to 10 g/10 min. (a3) Density measured in accordance with ASTM D1505 is 0.865 to 0.884 g/cm3. (a4) Shore A hardness measured in accordance with ASTM D2240 is 60 to 85.