Encapsulating material for solar cell and solar cell module

  • US 8,772,625 B2
  • Filed: 10/07/2011
  • Issued: 07/08/2014
  • Est. Priority Date: 10/08/2010
  • Status: Active Grant
First Claim
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1. An encapsulating material for solar cell comprising an ethylene/α

  • -olefin copolymer satisfying the following requirements (a1) to (a4) and (a6);

    (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;

    (a4) the shore A hardness is from 60 to 85 as measured in accordance with ASTM D2240; and

    (a6) the content of aluminum element in said ethylene/α

    -olefin copolymer is from 10 to 500 ppm.

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