Bridgestone Corporation

Kyocera Corporation

Hisataka Kataoka

Yoshihiko Inoue

Norihiko Kaga

Yasunori Tarutani

Takato Inamiya

Tetsuro Ikeda

Tokuo Okada

Ichiro Aoki

Makiko Shimada

Makiko Tomiyama

Akira Yoshitake

Naoya Ito

Katsumi Asano

The present invention provides a composition for a solar cell sealing film prepared by mixing an ethylene-&#x3b1;-olefin copolymer a metallocene catalyst (m-LLDPE) and another polymer as resin components, wherein the composition has the same processability as a composition containing m-LLDPE alone as a resin component and provides a solar cell sealing film having the same transparency as the composition containing m-LLDPE alone as resin component. A composition for a solar cell sealing film comprising m-LLDPE and low-density polyethylene (LDPE), wherein the weight average molecular weight of m-LLDPE (M) is 200,000 or less, the weight average molecular weight of LDPE (M) is 250,000 or less, and the mass ratio of m-LLDPE to LDPE (m-LLDPE:LDPE) is in a range of 80:20 to 30:70, and a solar cell sealing film prepared using the same.

Composition for solar cell sealing film, method for producing same and solar cell sealing film

The object of the present invention is to provide a solar cell sealing film obtained from a composition comprising chiefly ethylene-vinyl acetate copolymer and organic peroxides for giving crosslinked structure, which suppresses the occurrence of blisters without reduction of crosslink rate, even if the film contains silane-coupling agents for improving adhesive strength. The solar cell sealing film comprises ethylene-vinyl acetate copolymer, an organic peroxide, a silane-coupling agent, and a phosphite compound represented by formula (I):P(OR)&#x2003;&#x2003;(I)wherein, Ris a branched-chain aliphatic alkyl group having 8 to 14 carbon atoms, and three Rs are the same as or different from each other and further wherein the content of the vinyl acetate recurring unit of the ethylene-vinyl acetate copolymer is in the range of 20 to 35% by weight.

Solar cell sealing film and solar cell using the sealing film

The present invention provides a solar cell sealing film whereby generation of gas is decreased. The solar cell sealing film comprises a resin mixture of an ethylene-vinyl acetate copolymer and a polyethylene, and an organic peroxide. The mass ratio (EVA:PE) of the ethylene-vinyl acetate copolymer (EVA) to the polyethylene (PE) is 8:2 to 3:7, the content of the organic peroxide is 0.1 to 1.0 parts by mass based on 100 parts by mass of the resin mixture, and the gel rate after crosslinking is 20 to 80% by mass.

Solar cell sealing film and solar cell using the same

The present invention provides a solar cell sealing film in which the shrinkage is prevented when heated. The solar cell sealing filmA,B comprises a resin mixture of an ethylene-vinyl acetate copolymer and polyethylene, and an organic peroxide. The mass ratio (EVA:PE) of the ethylene-vinyl acetate copolymer (EVA) to the polyethylene (PE) is 8:2 to 3:7 and the melting point of the resin mixture (temperature at a viscosity of 30,000 Pa&#xb7;s) is 80 to 105&#xb0; C.

The solar cell sealing film according to the present invention includes ethylene-methyl methacrylate copolymer, a crosslinker and a silane coupling agent, wherein the crosslinker is contained in an amount of 0.05 to 0.7 part by weight, based on 100 parts by weight of the ethylene-methyl methacrylate copolymer, and the silane coupling agent is contained in an amount of 0.1 to 0.7 part by weight based on 100 parts by weight of the ethylene-methyl methacrylate copolymer, and wherein the ethylene-methyl methacrylate copolymer has a methyl methacrylate content of 25 to 35% by weight.

A sealing film having excellent adhesive characteristics for a solar cell is provided, which contains an inorganic filler in the sealing film. The sealing film for a solar cell contains ethylene-polar monomer copolymer, a crosslinking agent, and an inorganic filler. The sealing film is characterized by further containing a phosphite compound represented by formula (I): P(OR)(I) (wherein R1 is a hydrocarbon group having 1 to 20 carbon atoms).

Sealing film for solar cell and solar cell obtained by use of the sealing film

The object of the present invention to provide a solar cell sealing film, which has superior durability that maintains adhesive performance for a long duration under the circumstances of a high temperature and high humidity, exerts high crosslink rate at production of the solar cells, and suppresses occurrence of blister, and a solar cell using the sealing film. The solar cell sealing film includes: ethylene-polar monomer copolymer, an organic peroxide, and a silane-coupling agent, wherein the silane-coupling agent is represented by formula (I): in which Rrepresents alkyl group having 1 to 3 carbon atoms, three Rs are the same as or different from each other, and 'n' is an integer of 1 to 8; and the silane-coupling agent is contained in the range of 0.02 to 1.0 parts by weight based on 100 parts by weight of the ethylene-polar monomer copolymer.

A solar cell sealing film contains an ethylene-unsaturated ester copolymer, a crosslinker, and crosslinking auxiliary agents, wherein the solar cell sealing film contains a polyfunctional (meth)acrylate having 5 or more (meth)acryloyl groups in the molecule and triallyl isocyanurate as the crosslinking auxiliary agents, and a mass ratio of the polyfunctional (meth)acrylate to the triallyl isocyanurate is 0.06 to 0.3 parts of polyfunctional (meth)acrylate per 1 part of triallyl isocyanurate.

Solar cell sealing film and solar cell

Sealing film for solar cell which prevents conducting wires and electrodes of the solar cell from rusting and thereby enable the solar cell to retain its high photovoltaic performance for a long period. A light receiving surface sealing film for solar cell comprising ethylene-vinyl acetate copolymer, a cross-linking agent and an acid acceptor. A rear surface sealing film for solar cell comprising ethylene-vinyl acetate copolymer, a cross-linking agent and an acid acceptor, wherein the acid acceptor is contained in the range of not less than 0.5 parts by weight based on 100 parts by weight of ethylene-vinyl acetate copolymer.

Sealing film for solar cell

The present invention provides a sealing film for a solar cell having the improved heat resistance and light resistance and a solar cell made by using the same. A sealing film for a solar cell including ethylene/vinyl acetate copolymer and an organic peroxide, which includes a specific peroxycarbonate as the organic peroxide, and which includes a dihydroxydimethoxybenzophenone ultraviolet absorber without substantially including a hindered amine light stabilizer to prevent yellowing. A sealing film for a solar cell including ethylene/vinyl acetate copolymer and an organic peroxide, which includes a specific dialkylperoxide as the organic peroxide, and which includes dihydroxydimethoxybenzophenone ultraviolet absorber without substantially including monohydroxyalkoxybenzophenone ultraviolet absorber to prevent yellowing.

Sealing film for solar cell and solar cell prepared by using the same

The present invention provides a solar cell sealing film having enhanced transparency. A composition for a solar cell sealing film contains an ethylene-polar monomer copolymer, a crosslinker and a compound having an alkyleneoxy group. Thereby a solar cell sealing film having excellent all light beam transmittance and enhanced transparency can be formed.

Composition for solar cell sealing film, solar cell sealing film and solar cell using the sealing film

The object of the present invention is to provide a sealing film having excellent productivity, and improved light resistance and heat resistance, and a solar cell provided with the sealing film. A sealing film for a solar cell comprising ethylene-vinyl acetate copolymer and an organic peroxide, wherein the organic peroxide comprises an organic peroxide A having a 10 hour half-life in the range of 110 to 130&#xb0; C. in and an organic peroxide B having a 10 hour half-life in the range of 80 to 100&#xb0; C.; and a solar cell having the sealing film.

Growing community of inventors

Yokohama, Japan

Hisataka Kataoka