Encapsulating material for solar cell and solar cell module

US8772625B2 · kind B2 · utility

Assignees

• MITSUI CHEMICALS, INC. · JP
• MITSUI CHEMICALS TOHCELLO, INC. · JP

Inventors

• Shigenobu Ikenaga · Ichihara, JP
• Fumito Takeuchi · Chiba, JP
• Keiji Watanabe · Tokyo, JP
• Jun TOKUHIRO · Mobara, JP
• Takanobu Murofushi · Hitachinaka, JP
• Kazuhiro Yarimizu · Fujisawa, JP
• Tomoaki Ito · Ichihara, JP
• Nobuhiro Maruko · Sodegaura, JP

Key dates

• Filing date: Oct 7, 2011
• Grant date: Jul 8, 2014
• Expiry date: Oct 7, 2031

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E10/50
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Disclosed is an encapsulating material for solar cell containing an ethylene/α-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 α-olefin having 3 to 20 carbon atoms is from 10 to 20 mol %; (a2) MFR is from 10 to 50 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/cm3 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.