COMPOSITION FOR SEALING FILMS FOR SOLAR CELLS, METHOD FOR PRODUCING SAME, AND SEALING FILM FOR SOLAR CELLS

WIPO Patent Application WO/2014/189132

A1

Provided is a composition for sealing films for solar cells, which is obtained by mixing, as a resin component, an ethylene/α-olefin copolymer (m-LLDPE) with another polymer, said ethylene/α-olefin copolymer being polymerized using a metallocene catalyst. This composition for sealing films for solar cells has processing characteristics equivalent to those of a composition that uses an m-LLDPE by itself, and a sealing film for solar cells obtained from this composition for sealing films for solar cells has transparency equivalent to that of a sealing film obtained using an m-LLDPE by itself. A composition for sealing films for solar cells, which contains an m-LLDPE and a low-density polyethylene (LDPE), and which is characterized in that: the weight average molecular weight (Mw(m-LLDPE)) of the m-LLDPE is 200,000 or less; the weight average molecular weight (Mw(LDPE)) of the LDPE is 250,000 or less; and the mass ratio of the m-LLDPE to LDPE (m-LLDPE:LDPE) is within the range from 80:20 to 30:70. A sealing film for solar cells, which is obtained using this composition for sealing films for solar cells.

TARUTANI YASUNORI (JP)
KAGA NORIHIKO (JP)
KATAOKA HISATAKA (JP)
INAMIYA TAKATO (JP)
YOSHITAKE AKIRA (JP)

PCT/JP2014/063713

November 27, 2014

May 23, 2014

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BRIDGESTONE CORP (JP)

H01L31/048; C08F110/02; C08F210/16; C08J3/22; C08K5/14; C08L23/06; C08L23/08

WO2012056687A1

2012-05-03

JP2013021082A	2013-01-31
JP2006210906A	2006-08-10
JP2012015204A	2012-01-19
JP2011003783A	2011-01-06
JP2013008980A	2013-01-10

See also references of EP 3007235A4

ETOH TOSHIAKI (JP)
Toshiaki Eto (JP)

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