Mitsui Chemicals Tohcello, Inc.

Mitsui Chemicals, Inc.

Kazuhiro Yarimizu

Shigenobu Ikenaga

Fumito Takeuchi

Tomoaki Ito

Nobuhiro Maruko

Takanobu Murofushi

Jun Tokuhiro

Masaaki Odoi

Kaoru Ohshimizu

Takashi Hakuta

Hiroshi Mori

Keiji Watanabe

Hirofumi Zenkoh

A sheet set for encapsulating a solar battery including a first encapsulating sheet and a second encapsulating sheet which are disposed between a light-incident surface protective member and a back surface protective member, and are used to encapsulate solar battery elements is provided. When the first encapsulating sheet and the second encapsulating sheet are subjected to a heating and pressurization treatment in which the first encapsulating sheet and the second encapsulating sheet are heated and depressurized under defined conditions, a volume resistivity of the first encapsulating sheet measured under defined conditions, is higher than a volume resistivity of the second encapsulating sheet. The first encapsulating sheet is disposed between the light-incident surface protective member and the solar battery elements. The second encapsulating sheet has at least one polar group selected from a carboxyl group, an ester group, a hydroxyl group, an amino group, and an acetal group.

Sheet set for encapsulating solar battery

The encapsulating material for solar cell is an encapsulating material for solar cell including an ethylene/&#x3b1;-olefin copolymer and an organic peroxide having a one-minute half-life temperature in a range of 100&#xb0; C. to 170&#xb0; C. In addition, the complex viscosity of the encapsulating material for solar cell has the minimum value (&#x3b7;) of the complex viscosity at a temperature in a range of 100&#xb0; C. to lower than 135&#xb0; C., the minimum value (&#x3b7;) of the complex viscosity is in a range of 6.0&#xd7;10Pa&#xb7;s to 4.0&#xd7;10Pa&#xb7;s, the complex viscosity (&#x3b7;) of the encapsulating material for solar cell at 150&#xb0; C. is in a range of 2.0&#xd7;10Pa&#xb7;s to 1.0&#xd7;10Pa&#xb7;s, and the content of the organic peroxide in the encapsulating material for solar cell is in a range of 0.1 parts by weight to 3 parts by weight with respect to 100 parts by weight of the ethylene/&#x3b1;-olefin copolymer.

Encapsulating material for solar cell and solar cell module

An ethylene resin composition is provided which has excellent properties including adhesion properties, electrically insulating properties, transparency, moldability and process stability and can be produced without requiring any cross-linking procedure if necessary to improve productivity; and others. The ethylene resin composition contains a modified product produced by modifying an ethylene polymer (A) that meets all of the requirements a) to e) mentioned below with an ethylenically unsaturated silane compound (B). a) The density is 900 to 940 kg/m. b) The melting peak temperature is 90 to 125 &#xb0; C. as determined by DSC. c) The melt flow rate (MFR2) is 0.1 to 100 g/10 minutes as measured at 190 &#xb0; C. and a load of 2.16 kg in accordance with JIS K-6721. d) The Mw/Mn ratio is 1.2 to 3.5. e) The content of metal residues is 0.1 to 50 ppm.

Ethylene resin composition, sealing material for solar cell, and solar cell module utilizing the sealing material

Disclosed is an encapsulating material for solar cell containing an ethylene/&#x3b1;-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 &#x3b1;-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/cmas measured in accordance with ASTM D1505; and (a4) the shore A hardness is from 60 to 85 as measured in accordance with ASTM D2240.

Growing community of inventors

Fujisawa, Japan

Kazuhiro Yarimizu