Diaphragm sheet, and method for manufacturing solar cell module using diaphragm sheet

Abstract

The performances and durability of a diaphragm sheet of a solar cell laminator are enhanced, and a favorable lamination work is stably performed over a long period of time. In addition, by stably performing sufficient and uniform lamination over a long period of time, a high-quality module is stably manufactured over a long period of time. A solar cell module is manufactured by using a diaphragm sheet formed of a composition containing an ethylene-propylene-diene rubber (EPDM), which is low in creep deformation and high in durability against an organic peroxide and a silane coupling agent.

1 . A diaphragm sheet to be used in a laminator for solar cell module manufacture using an ethylene vinyl acetate resin as an encapsulant, which comprises a composition containing an ethylene-propylene-diene rubber and which satisfies the following requirements (1) and (2):
 (1) swelling ratios with respect to an organic peroxide and a silane coupling agent contained in the encapsulant are not more than 20%; and   (2) a creep deformation of the diaphragm sheet at a hot plate temperature of 130° C. is not more than 3 mm.   
     
     
         2 . A diaphragm sheet to be used in a laminator for solar cell module manufacture using an ethylene vinyl acetate resin as an encapsulant, which comprises a composition containing an ethylene-propylene-diene rubber and which satisfies the following requirements (1) and (2):
 (1) a swelling ratio to tertiary-butyl peroxy-2-ethylhexyl carbonate and vinyl triethoxysilane contained in the encapsulant is not more than 20%; and   (2) a creep deformation of the diaphragm sheet at a hot plate temperature of 130° C. is not more than 3 mm.   
     
     
         3 . A method for manufacturing a solar cell module using an ethylene vinyl acetate resin as an encapsulant, which comprises
 a step of laminating solar cells with the encapsulant by a laminator using a diaphragm sheet,   the diaphragm sheet comprising a composition containing an ethylene-propylene-diene rubber and satisfying the following requirements (1) and (2):   (1) swelling ratios with respect to an organic peroxide and a silane coupling agent contained in the encapsulant are not more than 20%; and   (2) a creep deformation of the diaphragm sheet at a hot plate temperature of 130° C. is not more than 3 mm.