JP3978912B2 - Solar cell cover material, sealing film, and solar cell - Google Patents
Solar cell cover material, sealing film, and solar cell Download PDFInfo
- Publication number
- JP3978912B2 JP3978912B2 JP34722698A JP34722698A JP3978912B2 JP 3978912 B2 JP3978912 B2 JP 3978912B2 JP 34722698 A JP34722698 A JP 34722698A JP 34722698 A JP34722698 A JP 34722698A JP 3978912 B2 JP3978912 B2 JP 3978912B2
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- Prior art keywords
- film
- solar cell
- cover material
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- solar
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Links
- 239000000463 material Substances 0.000 title claims description 49
- 238000007789 sealing Methods 0.000 title claims description 23
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 56
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 56
- 229920005989 resin Polymers 0.000 claims description 33
- 239000011347 resin Substances 0.000 claims description 33
- 239000000853 adhesive Substances 0.000 claims description 23
- 230000001070 adhesive effect Effects 0.000 claims description 23
- 230000001681 protective effect Effects 0.000 claims description 22
- 239000006097 ultraviolet radiation absorber Substances 0.000 claims description 13
- 239000011342 resin composition Substances 0.000 claims description 12
- 239000003431 cross linking reagent Substances 0.000 claims description 11
- -1 polyethylene terephthalate Polymers 0.000 claims description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 10
- 229910052809 inorganic oxide Inorganic materials 0.000 claims description 8
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 7
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 5
- 229920001577 copolymer Polymers 0.000 claims description 5
- 150000001451 organic peroxides Chemical group 0.000 claims description 5
- 239000000377 silicon dioxide Substances 0.000 claims description 5
- 239000002033 PVDF binder Substances 0.000 claims description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 4
- 229920000515 polycarbonate Polymers 0.000 claims description 4
- 239000004417 polycarbonate Substances 0.000 claims description 4
- 239000011112 polyethylene naphthalate Substances 0.000 claims description 4
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 4
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 4
- 229920002620 polyvinyl fluoride Polymers 0.000 claims description 4
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 4
- 238000010030 laminating Methods 0.000 claims description 3
- 229920003207 poly(ethylene-2,6-naphthalate) Polymers 0.000 claims description 3
- 229920001038 ethylene copolymer Polymers 0.000 claims description 2
- 125000000816 ethylene group Chemical group [H]C([H])([*:1])C([H])([H])[*:2] 0.000 claims description 2
- 239000002023 wood Substances 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 description 6
- 238000004132 cross linking Methods 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 239000011521 glass Substances 0.000 description 5
- AZQWKYJCGOJGHM-UHFFFAOYSA-N 1,4-benzoquinone Chemical compound O=C1C=CC(=O)C=C1 AZQWKYJCGOJGHM-UHFFFAOYSA-N 0.000 description 4
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 4
- 239000006087 Silane Coupling Agent Substances 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 150000001412 amines Chemical class 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 229920002799 BoPET Polymers 0.000 description 3
- 239000006096 absorbing agent Substances 0.000 description 3
- 230000003712 anti-aging effect Effects 0.000 description 3
- 239000003086 colorant Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- NWVVVBRKAWDGAB-UHFFFAOYSA-N p-methoxyphenol Chemical compound COC1=CC=C(O)C=C1 NWVVVBRKAWDGAB-UHFFFAOYSA-N 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- UWNADWZGEHDQAB-UHFFFAOYSA-N 2,5-dimethylhexane Chemical compound CC(C)CCC(C)C UWNADWZGEHDQAB-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 150000001565 benzotriazoles Chemical class 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 238000002845 discoloration Methods 0.000 description 2
- MCPKSFINULVDNX-UHFFFAOYSA-N drometrizole Chemical compound CC1=CC=C(O)C(N2N=C3C=CC=CC3=N2)=C1 MCPKSFINULVDNX-UHFFFAOYSA-N 0.000 description 2
- QUAMTGJKVDWJEQ-UHFFFAOYSA-N octabenzone Chemical compound OC1=CC(OCCCCCCCC)=CC=C1C(=O)C1=CC=CC=C1 QUAMTGJKVDWJEQ-UHFFFAOYSA-N 0.000 description 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 2
- 229920002493 poly(chlorotrifluoroethylene) Polymers 0.000 description 2
- 239000005023 polychlorotrifluoroethylene (PCTFE) polymer Substances 0.000 description 2
- CNHDIAIOKMXOLK-UHFFFAOYSA-N toluquinol Chemical compound CC1=CC(O)=CC=C1O CNHDIAIOKMXOLK-UHFFFAOYSA-N 0.000 description 2
- AFDFUQMUEYLSSW-UHFFFAOYSA-N (2-hydroxy-3-methoxyphenyl)-phenylmethanone Chemical class COC1=CC=CC(C(=O)C=2C=CC=CC=2)=C1O AFDFUQMUEYLSSW-UHFFFAOYSA-N 0.000 description 1
- QEQBMZQFDDDTPN-UHFFFAOYSA-N (2-methylpropan-2-yl)oxy benzenecarboperoxoate Chemical compound CC(C)(C)OOOC(=O)C1=CC=CC=C1 QEQBMZQFDDDTPN-UHFFFAOYSA-N 0.000 description 1
- BNBUGJUBWJUZQH-UHFFFAOYSA-N 1,1-bis(tert-butylperoxy)cyclohexane;1,1-bis(tert-butylperoxy)-3,3,5-trimethylcyclohexane Chemical compound CC(C)(C)OOC1(OOC(C)(C)C)CCCCC1.CC1CC(C)(C)CC(OOC(C)(C)C)(OOC(C)(C)C)C1 BNBUGJUBWJUZQH-UHFFFAOYSA-N 0.000 description 1
- ZNCDSAZBKYUMAB-UHFFFAOYSA-N 1,1-bis(tert-butylperoxy)octane Chemical compound CCCCCCCC(OOC(C)(C)C)OOC(C)(C)C ZNCDSAZBKYUMAB-UHFFFAOYSA-N 0.000 description 1
- KOMNUTZXSVSERR-UHFFFAOYSA-N 1,3,5-tris(prop-2-enyl)-1,3,5-triazinane-2,4,6-trione Chemical compound C=CCN1C(=O)N(CC=C)C(=O)N(CC=C)C1=O KOMNUTZXSVSERR-UHFFFAOYSA-N 0.000 description 1
- HQOVXPHOJANJBR-UHFFFAOYSA-N 2,2-bis(tert-butylperoxy)butane Chemical compound CC(C)(C)OOC(C)(CC)OOC(C)(C)C HQOVXPHOJANJBR-UHFFFAOYSA-N 0.000 description 1
- QWQNFXDYOCUEER-UHFFFAOYSA-N 2,3-ditert-butyl-4-methylphenol Chemical compound CC1=CC=C(O)C(C(C)(C)C)=C1C(C)(C)C QWQNFXDYOCUEER-UHFFFAOYSA-N 0.000 description 1
- ODBCKCWTWALFKM-UHFFFAOYSA-N 2,5-bis(tert-butylperoxy)-2,5-dimethylhex-3-yne Chemical compound CC(C)(C)OOC(C)(C)C#CC(C)(C)OOC(C)(C)C ODBCKCWTWALFKM-UHFFFAOYSA-N 0.000 description 1
- DMWVYCCGCQPJEA-UHFFFAOYSA-N 2,5-bis(tert-butylperoxy)-2,5-dimethylhexane Chemical compound CC(C)(C)OOC(C)(C)CCC(C)(C)OOC(C)(C)C DMWVYCCGCQPJEA-UHFFFAOYSA-N 0.000 description 1
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 description 1
- WXRQLBCBMKPTKI-UHFFFAOYSA-N 3-benzoyl-4-hydroxy-5-methoxybenzenesulfonic acid Chemical compound COC1=CC(S(O)(=O)=O)=CC(C(=O)C=2C=CC=CC=2)=C1O WXRQLBCBMKPTKI-UHFFFAOYSA-N 0.000 description 1
- MGVDSBGNZUMFRD-UHFFFAOYSA-N 3-benzoylbenzenesulfonic acid Chemical compound OS(=O)(=O)C1=CC=CC(C(=O)C=2C=CC=CC=2)=C1 MGVDSBGNZUMFRD-UHFFFAOYSA-N 0.000 description 1
- OXYZDRAJMHGSMW-UHFFFAOYSA-N 3-chloropropyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)CCCCl OXYZDRAJMHGSMW-UHFFFAOYSA-N 0.000 description 1
- SJECZPVISLOESU-UHFFFAOYSA-N 3-trimethoxysilylpropan-1-amine Chemical compound CO[Si](OC)(OC)CCCN SJECZPVISLOESU-UHFFFAOYSA-N 0.000 description 1
- UUEWCQRISZBELL-UHFFFAOYSA-N 3-trimethoxysilylpropane-1-thiol Chemical compound CO[Si](OC)(OC)CCCS UUEWCQRISZBELL-UHFFFAOYSA-N 0.000 description 1
- 239000004342 Benzoyl peroxide Substances 0.000 description 1
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 230000006750 UV protection Effects 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- NOZAQBYNLKNDRT-UHFFFAOYSA-N [diacetyloxy(ethenyl)silyl] acetate Chemical compound CC(=O)O[Si](OC(C)=O)(OC(C)=O)C=C NOZAQBYNLKNDRT-UHFFFAOYSA-N 0.000 description 1
- 239000011358 absorbing material Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000000981 basic dye Substances 0.000 description 1
- 150000008366 benzophenones Chemical class 0.000 description 1
- 235000019400 benzoyl peroxide Nutrition 0.000 description 1
- 229920006026 co-polymeric resin Polymers 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- LSXWFXONGKSEMY-UHFFFAOYSA-N di-tert-butyl peroxide Chemical compound CC(C)(C)OOC(C)(C)C LSXWFXONGKSEMY-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- FWDBOZPQNFPOLF-UHFFFAOYSA-N ethenyl(triethoxy)silane Chemical compound CCO[Si](OCC)(OCC)C=C FWDBOZPQNFPOLF-UHFFFAOYSA-N 0.000 description 1
- WOXXJEVNDJOOLV-UHFFFAOYSA-N ethenyl-tris(2-methoxyethoxy)silane Chemical compound COCCO[Si](OCCOC)(OCCOC)C=C WOXXJEVNDJOOLV-UHFFFAOYSA-N 0.000 description 1
- SBRXLTRZCJVAPH-UHFFFAOYSA-N ethyl(trimethoxy)silane Chemical compound CC[Si](OC)(OC)OC SBRXLTRZCJVAPH-UHFFFAOYSA-N 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000001023 inorganic pigment Substances 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000012860 organic pigment Substances 0.000 description 1
- QRMPKOFEUHIBNM-UHFFFAOYSA-N p-dimethylcyclohexane Natural products CC1CCC(C)CC1 QRMPKOFEUHIBNM-UHFFFAOYSA-N 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical compound N1C(N=C2C3=CC=CC=C3C(N=C3C4=CC=CC=C4C(=N4)N3)=N2)=C(C=CC=C2)C2=C1N=C1C2=CC=CC=C2C4=N1 IEQIEDJGQAUEQZ-UHFFFAOYSA-N 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 229940116351 sebacate Drugs 0.000 description 1
- CXMXRPHRNRROMY-UHFFFAOYSA-L sebacate(2-) Chemical compound [O-]C(=O)CCCCCCCCC([O-])=O CXMXRPHRNRROMY-UHFFFAOYSA-L 0.000 description 1
- GQIUQDDJKHLHTB-UHFFFAOYSA-N trichloro(ethenyl)silane Chemical compound Cl[Si](Cl)(Cl)C=C GQIUQDDJKHLHTB-UHFFFAOYSA-N 0.000 description 1
- HQYALQRYBUJWDH-UHFFFAOYSA-N trimethoxy(propyl)silane Chemical compound CCC[Si](OC)(OC)OC HQYALQRYBUJWDH-UHFFFAOYSA-N 0.000 description 1
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 239000005050 vinyl trichlorosilane Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
- B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
- B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
- B32B17/10788—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer containing ethylene vinylacetate
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- Photovoltaic Devices (AREA)
Description
【０００１】
【発明の属する技術分野】
本発明は、太陽電池用セルの透明保護部材として用いられるカバー材、このカバー材を用いた封止膜及び太陽電池に係り、特に、防湿性と耐光性を兼備する透明フィルムよりなり、太陽電池の軽量化、耐衝撃性及び耐久性の向上に有効な太陽電池用カバー材及び太陽電池用カバー材兼用封止膜並びにこの太陽電池用カバー材を表面側及び／又は裏面側透明保護部材として用いた、軽量、高耐衝撃性、高耐久性の太陽電池に関する。
【０００２】
【従来の技術】
近年、資源の有効利用や環境汚染の防止等の面から、太陽光を直接電気エネルギーに変換する太陽電池が注目され、開発が進められている。
【０００３】
太陽電池は、一般に、図６に示す如く、受光面側の表面側透明保護部材としてのガラス基板１１と裏面側保護部材（バックカバー）１２との間にエチレン−酢酸ビニル共重合体（ＥＶＡ）フィルム１３Ａ，１３Ｂの封止膜により、太陽電池用セル、即ち、シリコン等の発電素子１４を封止した構成とされている。
【０００４】
このような太陽電池は、ガラス基板１１、封止膜用ＥＶＡフィルム１３Ａ、シリコン発電素子１４、封止膜用ＥＶＡフィルム１３Ｂ及びバックカバー１２をこの順で積層し、ＥＶＡを加熱溶融して架橋硬化させることにより接着一体化することで製造される。
【０００５】
ところで、太陽電池の表面側透明保護部材としては、紫外線に対する耐久性に優れることがまず第一に要求されるが、加えて、湿気ないし水の透過による内部の導線や電極の発錆を防止するために、防湿性に優れることが極めて重要な要件となる。このため、従来においては、表面側透明保護部材としてはガラス板が用いられている。
【０００６】
【発明が解決しようとする課題】
しかし、ガラス板は耐光性、防湿性に優れる反面、重量が重く、また、衝撃に弱く割れ易いという欠点がある。
【０００７】
透明樹脂フィルムであれば、軽く、衝撃による破損の問題はないが、現状では耐光性、防湿性がともに良好な樹脂フィルムは提供されていない。即ち、例えば、耐光性に優れる透明樹脂フィルムとして２−エチレン−４−フッ化エチレン共重合体（ＥＴＦＥ）等のフッ素樹脂フィルムが知られているが、このものは、透湿性があるため太陽電池の表面側透明保護部材として適用することはできない。
【０００８】
本発明は上記従来の問題点を解決し、太陽電池用セルの透明保護部材として用いられるカバー材であって、防湿性と耐光性を兼備する透明フィルムよりなり、太陽電池の軽量化、耐衝撃性及び耐久性の向上に有効な太陽電池用カバー材及び太陽電池用カバー材兼用封止膜並びにこの太陽電池用カバー材を表面側及び／又は裏面側透明保護部材として用いた、軽量、高耐衝撃性、高耐久性の太陽電池を提供することを目的とする。
【０００９】
【課題を解決するための手段】
本発明の太陽電池用カバー材は、太陽電池用セルの透明保護部材として用いられるカバー材であって、透明高耐光フィルムと透明高防湿フィルムとを、紫外線吸収剤及び架橋剤を配合したエチレン−酢酸ビニル共重合体樹脂系接着剤で積層一体化してなり、前記透明高防湿フィルムが、無機酸化物をコーティングした透明フィルムの２枚を該コーティング面同士を貼り合わせてなる積層フィルムよりなり、前記透明高耐光フィルムが、フッ素樹脂フィルムであるか、又は、アクリル、ポリカーボネート、ポリエチレンテレフタレート及びポリエチレンナフタレートよりなる１種又は２種以上の樹脂に紫外線吸収剤を練り込んだ樹脂組成物を成膜してなることを特徴とする。
【００１０】
本発明の太陽電池用カバー材であれば、太陽電池の透明保護部材に要求される防湿性を透明高防湿フィルムにより、また、耐光性を透明高耐光フィルムとＥＶＡ樹脂系接着剤中の紫外線吸収剤により確保することができる。なお、このＥＶＡ樹脂系接着剤であれば、それ自体防湿性が高く、また、架橋剤を含むＥＶＡ樹脂系接着剤は耐候性にも優れるため、カバー材の特性向上に有効である。このＥＶＡ樹脂系接着剤に配合する架橋剤としては、有機過酸化物が挙げられる。
【００１１】
本発明において、透明高防湿フィルムとしては、ポリエチレンテレフタレート（ＰＥＴ）フィルム等に、シリカ又はアルミナ等の無機酸化物をコーティングした透明フィルム２枚をコーティング面同士を貼り合わせてなる積層フィルムが好適である。
【００１２】
また、透明高耐光フィルムとしては、ポリテトラフルオロエチレン（ＰＴＦＥ）、４−フッ化エチレン−パークロロアルコキシ共重合体（ＰＦＡ）、４−フッ化エチレン−６−フッ化プロピレン共重合体（ＦＥＰ）、２−エチレン−４−フッ化エチレン共重合体（ＥＴＦＥ）、ポリ３−フッ化塩化エチレン（ＰＣＴＦＥ）、ポリフッ化ビニリデン（ＰＶＤＦ）及びポリフッ化ビニル（ＰＶＦ）等のフッ素樹脂フィルム、或いは、アクリル、ポリカーボネート、ＰＥＴ、ポリエチレンナフタレート（ＰＥＮ）等の樹脂に紫外線吸収剤を練り込んだ樹脂組成物を成膜したものが好適である。
【００１３】
本発明の太陽電池用カバー材兼用封止膜は、太陽電池用セルの透明保護部材を兼ねた封止膜であって、上記本発明の太陽電池用カバー材とＥＶＡフィルムとを積層一体化してなるものである。
【００１４】
本発明の太陽電池は、表面側保護部材と裏面側保護部材との間に太陽電池用セルを封止してなる太陽電池において、表面側及び／又は裏面側保護部材として上記本発明の太陽電池用カバー材を用いたものである。
【００１５】
【発明の実施の形態】
以下に図面を参照して本発明の実施の形態を詳細に説明する。
【００１６】
なお、以下においては、本発明の太陽電池用カバー材を表面側透明保護部材として用いた場合を例示するが、本発明の太陽電池カバー材は、裏面側透明保護部材として用いても良く、また、表面側と裏面側の両保護部材として用いても良い。
【００１７】
図１は本発明の太陽電池用カバー材の実施の形態を示す断面図、図２，３は本発明に係る透明高防湿フィルムの実施の形態を示す断面図、図４は本発明の太陽電池用カバー材兼用封止膜の実施の形態を示す断面図、図５は本発明の太陽電池の実施の形態を示す断面図である。
【００１８】
図１に示す太陽電池用カバー材１は、透明高防湿フィルム２と透明高耐光フィルム３とを紫外線吸収剤及び架橋剤を配合したＥＶＡ樹脂系接着剤のシート（以下「紫外線吸収ＥＶＡ接着シート」と称す。）４を介して積層し、接着一体化したものである。
【００１９】
透明高防湿フィルム２としては、図２に示す如く、ＰＥＴフィルム等の透明基材フィルム２ＡにＣＶＤ（化学蒸着）、ＰＶＤ（反応蒸着）法等により、シリカ、アルミナ等の無機酸化物のコーティング膜よりなる防湿膜２Ｂを形成したものがある。即ち、防湿フィルムとしては、基材フィルムにアルミニウム等の金属のコーティング膜を形成したものも知られているが、アルミニウム等の金属では、太陽電池に適用した場合、電流がリークする恐れがあるため、防湿膜としては、無機酸化物のコーティング膜が好ましい。
【００２０】
ところで、図２に示す如く、基材フィルム２Ａの表面に形成したシリカ、アルミナ等の無機酸化物よりなる防湿膜２Ｂは、取り扱い時等に剥離し易い。このため、透明高防湿フィルム２としては、図３に示す如く、上述のＰＥＴフィルム等の基材フィルム２Ａの表面にシリカ、アルミナ等の無機酸化物よりなる防湿膜２Ｂを形成したフィルムを２枚用い、これらを防湿膜２Ｂ，２Ｂ側を内側にして接着シート２Ｃで貼り合わせることにより、防湿膜２Ｂが表面に露出しないようにしたものを用いる。この接着シート２Ｃとしては、後述の透明高防湿フィルム２と透明高耐光フィルム３の接着に用いられる紫外線吸収接着シート４と同様のものを用いることができ（ただし、紫外線吸収剤は配合されていなくても良いが、配合されていることが望ましい。）、その接着条件で接着処理すれば良い。
【００２１】
なお、図３に示すような貼り合せタイプの透明高防湿フィルムの場合、基材フィルム２Ａとしては厚さ６〜２５０μｍのＰＥＴフィルムが好適であり、防湿膜２Ｂは５μｍ以下程度の厚さに形成するのが好ましい。また、接着シート２Ｃの厚さは５〜５０μｍ程度とするのが好ましい。
【００２２】
透明高耐光フィルム３としては、耐紫外線性に優れたフッ素樹脂フィルム又は、紫外線吸収剤を練り込んだ樹脂フィルムが挙げられる。
【００２３】
このうち、フッ素樹脂フィルムとしては、ＰＴＦＥ、ＰＦＡ、ＦＥＰ、ＥＴＦＥ、ＰＣＴＦＥ、ＰＶＤＦ、ＰＶＦフィルム等が挙げられる。
【００２４】
また、紫外線吸収剤を練り込んだ樹脂フィルムとしては、アクリル、ポリカーボネート、ＰＥＴ、ＰＥＮフィルム等が挙げられ、その紫外線吸収剤としては、２−ヒドロキシ−４−オクトキシベンゾフェノン、２−ヒドロキシ−メトキシ−５−スルフォベンゾフェノン等のベンゾフェノン系；２−（２’−ヒドロキシ−５−メチルフェニル）ベンゾトリアゾール等のベンゾトリアゾール系；フェニルサルシレート、ｐ−ｔ−ブチルフェニルサルシレート等のヒンダートアミン系紫外線吸収材が挙げられ、通常の場合、基材樹脂に対して１〜２０重量％程度配合される。
【００２５】
このような透明高耐光フィルム３の厚さは、６〜２００μｍ程度であることが好ましい。
【００２６】
紫外線吸収ＥＶＡ接着シート４としては、ＥＶＡ樹脂に、紫外線吸収剤及び架橋剤、必要に応じてその他の添加剤を配合してなるＥＶＡ樹脂組成物を成膜したものを用いることができる。
【００２７】
以下に本発明に係る紫外線吸収ＥＶＡ接着シート４の成膜原料として好適なＥＶＡ樹脂組成物について以下に説明する。
【００２８】
このＥＶＡ樹脂組成物には、耐候性の向上のために架橋剤を配合して架橋構造を持たせるが、この架橋剤としては、一般に、１００℃以上でラジカルを発生する有機過酸化物が用いられ、特に、配合時の安定性を考慮に入れれば、半減期１０時間の分解温度が７０℃以上であるものが好ましい。このような有機過酸化物としては、例えば２，５−ジメチルヘキサン；２，５−ジハイドロパーオキサイド；２，５−ジメチル−２，５−ジ（ｔ−ブチルパーオキシ）ヘキサン；３−ジ−ｔ−ブチルパーオキサイド；ｔ−ジクミルパーオキサイド；２，５−ジメチル−２，５−ジ（ｔ−ブチルパーオキシ）ヘキシン；ジクミルパーオキサイド；α，α’−ビス（ｔ−ブチルパーオキシイソプロピル）ベンゼン；ｎ−ブチル−４，４−ビス（ｔ−ブチルパーオキシ）ブタン；２，２−ビス（ｔ−ブチルパーオキシ）ブタン；１，１−ビス（ｔ−ブチルパーオキシ）シクロヘキサン；１，１−ビス（ｔ−ブチルパーオキシ）３，３，５−トリメチルシクロヘキサン；ｔ−ブチルパーオキシベンゾエート；ベンゾイルパーオキサイド等を用いることができる。これらの有機過酸化物の配合量は、一般にＥＶＡ樹脂１００重量部に対して５重量部以下、好ましくは１〜３重量部である。
【００２９】
また、このＥＶＡ樹脂組成物には、紫外線吸収ＥＶＡ接着シート４に耐光性を付与するために紫外線吸収剤を配合するが、この、紫外線吸収剤としては、２−ヒドロキシ−４−オクトキシベンゾフェノン、２−ヒドロキシ−メトキシ−５−スルフォベンゾフェノン等のベンゾフェノン系；２−（２’−ヒドロキシ−５−メチルフェニル）ベンゾトリアゾール等のベンゾトリアゾール系；フェニルサルシレート、ｐ−ｔ−ブチルフェニルサルシレート等のヒンダートアミン系紫外線吸収剤が挙げられ、通常の場合、ＥＶＡ樹脂１００重量部に対して１〜５０重量部程度配合される。
【００３０】
このＥＶＡ樹脂組成物には、透明高防湿フィルム２及び透明高耐光フィルム３との接着力向上の目的で、ＥＶＡ樹脂にシランカップリング剤を添加することができる。この目的に供されるシランカップリング剤としては公知のもの、例えばγ−クロロプロピルトリメトキシシラン；ビニルトリクロロシラン；ビニルトリエトキシシラン；ビニル−トリス−（β−メトキシエトキシ）シラン；γ−メタクリロキシプロピルトリメトキシシラン；β−（３，４−エトキシシクロヘキシル）エチルトリメトキシシラン；γ−グリシドキシプロピルトリメトキシシラン；ビニルトリアセトキシシラン；γ−メルカプトプロピルトリメトキシシラン；γ−アミノプロピルトリメトキシシラン；Ｎ−β−（アミノエチル）−γ−アミノプロピルトリメトキシシラン等を挙げることができる。これらのシランカップリング剤の配合量は、一般にＥＶＡ樹脂１００重量部に対して５重量部以下、好ましくは０．１〜２重量部である。
【００３１】
更に、ＥＶＡ樹脂のゲル分率を向上させ、耐久性を向上するためにＥＶＡ樹脂に架橋助剤を添加することができる。この目的に供される架橋助剤としては、公知のものとしてトリアリルイソシアヌレート；トリアリルイソシアネート等の３官能の架橋助剤の他、ＮＫエステル等の単官能の架橋助剤等も挙げることができる。これらの架橋助剤の配合量は、一般にＥＶＡ樹脂１００重量部に対して１０重量部以下、好ましくは１〜５重量部である。
【００３２】
更に、ＥＶＡ樹脂の安定性を向上する目的でハイドロキノン；ハイドロキノンモノメチルエーテル；ｐ−ベンゾキノン；メチルハイドロキノンなどを添加することができ、これらの配合量は、一般にＥＶＡ樹脂１００重量部に対して５重量部以下である。
【００３３】
このＥＶＡ樹脂組成物には、更に必要に応じ、上記以外に着色剤、老化防止剤、変色防止剤等を添加することができる。着色剤の例としては、金属酸化物、金属粉等の無機顔料、アゾ系、フタロシアニン系、アヂ系、酸性又は塩基染料系レーキ等の有機顔料がある。老化防止剤としては、アミン系；フェノール系；ビスフェニル系；ヒンダートアミン系があり、例えばジ−ｔ−ブチル−ｐ−クレゾール；ビス（２，２，６，６−テトラメチル−４−ピペラジル）セバケート等がある。
【００３４】
このようなＥＶＡ樹脂組成物よりなる紫外線吸収ＥＶＡ接着シート４の厚さは５〜５０μｍ程度であることが好ましい。
【００３５】
本発明の太陽電池用カバー材１は、上述の透明高防湿フィルム２と透明高耐光フィルム３との間に紫外線吸収ＥＶＡ接着シート４を介在させて、当該紫外線吸収ＥＶＡ接着シート４の接着条件で加熱加圧するなどして接着一体化することにより、容易に製造することができる。
【００３６】
なお、本発明のカバー材は透明高耐光フィルム３が表面側に、透明高防湿フィルム２が内面側に配置されるのが好ましい。
【００３７】
このような太陽電池用カバー材を用いて本発明の太陽電池を製造するには、図６に示す従来の太陽電池のガラス板の代りに本発明のカバー材を用いて封止を行えば良いが、その際、本発明のカバー材を予め封止用ＥＶＡフィルムと積層一体化して用いるのが好適である。
【００３８】
図４に示す通り、本発明の太陽電池用カバー材兼用封止膜５は、透明高防湿フィルム２と透明高耐光フィルム３とを紫外線吸収剤及び架橋剤を配合したＥＶＡ樹脂系接着剤で接着してなる本発明のカバー材１と、ＥＶＡフィルム６とを積層一体化してなるものである。
【００３９】
この太陽電池用カバー材兼用封止膜５はＥＶＡフィルム６の製造に当り、予め透明高防湿フィルム２と透明高耐光フィルム３とを接着した本発明の太陽電池用カバー材１を積層一体化することにより容易に製造することができる。この場合のラミネート温度としては、７５〜９０℃程度が適当である。
【００４０】
本発明の太陽電池１０は、図５に示す如く、この太陽電池用カバー材兼用封止膜５を用いて、バックカバー７、ＥＶＡフィルム８、シリコン発電素子９等の太陽電池用セル及び太陽電池用カバー材兼用封止膜５の積層体を、常法に従って、真空ラミネーターで温度１２０〜１５０℃、脱気時間２〜１５分、プレス圧力０．５〜１ａｔｍ、プレス時間８〜４５分で加熱加圧圧着することにより容易に製造することができる。
【００４１】
なお、本発明の太陽電池に用いられる封止膜としてのＥＶＡフィルムの成膜原料として好適なＥＶＡ樹脂組成物は前述の紫外線吸収ＥＶＡ接着シート４の成膜原料として好適なＥＶＡ樹脂組成物と同様である。
【００４２】
この封止膜用ＥＶＡ樹脂組成物もまた、耐久性の向上のために前述と同様の架橋剤をＥＶＡ樹脂１００重量部に対して５重量部以下、好ましくは１〜３重量部配合して架橋構造を持たせる。
【００４３】
また、太陽電池の封止膜として、発電素子との接着力向上の目的で、ＥＶＡ樹脂に前述のシランカップリング剤をＥＶＡ樹脂１００重量部に対して５重量部以下、好ましくは０．１〜２重量部配合することができる。
【００４４】
更に、ＥＶＡ樹脂のゲル分率を向上させ、耐久性を向上するためにＥＶＡ樹脂に前述の架橋助剤をＥＶＡ樹脂１００重量部に対して１０重量部以下、好ましくは１〜５重量部添加することができる。
【００４５】
更に、ＥＶＡ樹脂の安定性を向上する目的でハイドロキノン；ハイドロキノンモノメチルエーテル；ｐ−ベンゾキノン；メチルハイドロキノンなどをＥＶＡ樹脂１００重量部に対して５重量部以下添加することができる。
【００４６】
更に、必要に応じ、上記以外に前述と同様の着色剤、紫外線吸収剤、老化防止剤、変色防止剤等を添加することができる。
【００４７】
【発明の効果】
以上詳述した通り、本発明の太陽電池用カバー材は防湿性と耐光性とが共に良好な透明樹脂フィルムであるため、この太陽電池用カバー材を太陽電池の透明保護部材として用いることにより、軽量で耐衝撃性に優れ、紫外線劣化や発錆の問題もなく耐久性に優れた太陽電池を提供することができる。
【００４８】
本発明の太陽電池用カバー材兼用封止膜は、このような本発明の太陽電池用カバー材とＥＶＡフィルムとを一体化してなるものであるため、この太陽電池用カバー材兼用封止膜を用いることで、軽量で耐衝撃性、耐久性に優れた太陽電池を良好な作業性のもとに効率的に製造することができる。
【００４９】
本発明の太陽電池は、本発明の太陽電池用カバー材を表面側及び／又は裏面側透明保護部材として用いたものであり、軽量で耐衝撃性、耐久性に優れる。
【図面の簡単な説明】
【図１】本発明の太陽電池用カバー材の実施の形態を示す断面図である。
【図２】本発明に係る透明高防湿フィルムの実施の形態を示す断面図である。
【図３】本発明に係る透明高防湿フィルムの実施の形態を示す断面図である。
【図４】本発明の太陽電池用カバー材兼用封止膜の実施の形態を示す断面図である。
【図５】本発明の太陽電池の実施の形態を示す断面図である。
【図６】従来の太陽電池を示す断面図である。
【符号の説明】
１ 太陽電池用カバー材
２ 透明高防湿フィルム
３ 透明高耐光フィルム
４ 紫外線吸収ＥＶＡ接着シート
５ 太陽電池用カバー材兼用封止膜
６ ＥＶＡフィルム
７ バックカバー
８ ＥＶＡフィルム
９ シリコン発電素子
１０ 太陽電池[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cover material used as a transparent protective member of a cell for solar cells, a sealing film using the cover material, and a solar cell, and more particularly a transparent film having both moisture resistance and light resistance. Solar cell cover material and solar cell cover material sealing film effective for weight reduction, impact resistance and durability improvement, and this solar cell cover material are used as a front and / or back side transparent protective member The present invention relates to a lightweight, high impact resistance, high durability solar cell.
[0002]
[Prior art]
In recent years, solar cells that directly convert sunlight into electric energy have attracted attention and are being developed from the viewpoint of effective use of resources and prevention of environmental pollution.
[0003]
As shown in FIG. 6, a solar cell generally has an ethylene-vinyl acetate copolymer (EVA) between a glass substrate 11 as a surface-side transparent protective member on the light-receiving surface side and a back-side protective member (back cover) 12. It is set as the structure which sealed the cells for solar cells, ie, the electric
[0004]
In such a solar cell, the glass substrate 11, the sealing
[0005]
By the way, as a surface-side transparent protective member of a solar cell, first of all, it is required to be excellent in durability against ultraviolet rays. In addition, it prevents rusting of internal conductors and electrodes due to moisture or water permeation. Therefore, it is an extremely important requirement to have excellent moisture resistance. For this reason, conventionally, a glass plate is used as the surface-side transparent protective member.
[0006]
[Problems to be solved by the invention]
However, the glass plate is excellent in light resistance and moisture resistance, but has a drawback that it is heavy and weak against impact and easily cracked.
[0007]
If it is a transparent resin film, it is light and there is no problem of damage due to impact, but at present, no resin film having both good light resistance and moisture resistance has been provided. That is, for example, a fluororesin film such as 2-ethylene-4-fluorinated ethylene copolymer (ETFE) is known as a transparent resin film excellent in light resistance. It cannot be applied as a surface side transparent protective member.
[0008]
The present invention solves the above-mentioned conventional problems, and is a cover material used as a transparent protective member for a solar cell, comprising a transparent film having both moisture resistance and light resistance. The solar cell cover material and the solar cell cover material sealing film effective for improving the durability and durability, and the solar cell cover material as a transparent protective member for the front side and / or the back side are used. An object is to provide an impact-resistant and highly durable solar cell.
[0009]
[Means for Solving the Problems]
The cover material for a solar cell of the present invention is a cover material used as a transparent protective member of a cell for a solar cell, and is an ethylene-containing a transparent high light-resistant film and a transparent high moisture-proof film mixed with an ultraviolet absorber and a crosslinking agent. Ri Na laminated integrally with vinyl acetate copolymer resin-based adhesive, the transparent high moisture barrier film, two sheets of transparent film coated with an inorganic oxide consists of laminated film made by laminating the coating faces, The transparent high light resistance film is a fluororesin film, or a resin composition in which an ultraviolet absorber is kneaded into one or more kinds of resins made of acrylic, polycarbonate, polyethylene terephthalate and polyethylene naphthalate is formed into a film. It is characterized by becoming .
[0010]
If it is the cover material for solar cells of this invention, the moisture-proof property requested | required of the transparent protective member of a solar cell will be UV absorption in a transparent high-light-proof film and EVA resin adhesive for light resistance. It can be ensured by the agent. Note that this EVA resin-based adhesive itself has high moisture resistance, and an EVA resin-based adhesive containing a cross-linking agent is also excellent in weather resistance, and is effective in improving the characteristics of the cover material. An organic peroxide is mentioned as a crosslinking agent mix | blended with this EVA resin adhesive.
[0011]
In the present invention, the transparent high-moisture barrier films, polyethylene terephthalate (PET) film, laminated film two coated transparent fill beam silica or inorganic oxides such as alumina made by bonding coating faces is suitable is there.
[0012]
Moreover, as a transparent high light resistance film, polytetrafluoroethylene (PTFE), 4-fluorinated ethylene-perchloroalkoxy copolymer (PFA), 4-fluorinated ethylene-6-fluorinated propylene copolymer (FEP) , Fluororesin films such as 2-ethylene-4-fluoroethylene copolymer (ETFE), poly-3-fluoroethylene chloride (PCTFE), polyvinylidene fluoride (PVDF) and polyvinyl fluoride (PVF), or acrylic A resin composition obtained by kneading a UV absorber in a resin such as polycarbonate, PET, or polyethylene naphthalate (PEN) is preferable.
[0013]
The solar cell cover material sealing film of the present invention is a sealing film that also functions as a transparent protective member for solar cell cells, and is formed by laminating and integrating the solar cell cover material of the present invention and an EVA film. It will be.
[0014]
The solar cell of the present invention is a solar cell in which a solar cell is sealed between a front surface side protective member and a back surface side protective member, and the solar cell of the present invention as a front surface side and / or back surface side protective member. Cover material is used.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0016]
In the following, the case where the solar cell cover material of the present invention is used as a front surface side transparent protective member will be exemplified, but the solar cell cover material of the present invention may be used as a back surface side transparent protective member. Further, it may be used as both protective members on the front side and the back side.
[0017]
FIG. 1 is a cross-sectional view showing an embodiment of a cover material for a solar cell of the present invention, FIGS. 2 and 3 are cross-sectional views showing an embodiment of a transparent high moisture-proof film according to the present invention, and FIG. 4 is a solar cell of the present invention. FIG. 5 is a sectional view showing an embodiment of the solar cell of the present invention.
[0018]
The cover material 1 for solar cells shown in FIG. 1 is a sheet of an EVA resin adhesive in which a transparent high moisture-proof film 2 and a transparent high light resistant film 3 are blended with an ultraviolet absorber and a crosslinking agent (hereinafter referred to as “ultraviolet absorbing EVA adhesive sheet”). 4) are laminated via 4 and bonded and integrated.
[0019]
As shown in FIG. 2, the transparent high moisture-proof film 2 is a coating film of an inorganic oxide such as silica or alumina on a
[0020]
By the way, as shown in FIG. 2, the moisture-proof film 2B made of an inorganic oxide such as silica or alumina formed on the surface of the
[0021]
In the case of a laminated high moisture-proof film as shown in FIG. 3, a PET film having a thickness of 6 to 250 μm is suitable as the
[0022]
Examples of the transparent high light-resistant film 3 include a fluororesin film excellent in ultraviolet resistance or a resin film kneaded with an ultraviolet absorber.
[0023]
Among these, examples of the fluororesin film include PTFE, PFA, FEP, ETFE, PCTFE, PVDF, and PVF film.
[0024]
Examples of the resin film kneaded with an ultraviolet absorber include acrylic, polycarbonate, PET, and PEN films. Examples of the ultraviolet absorber include 2-hydroxy-4-octoxybenzophenone, 2-hydroxy-methoxy- Benzophenone series such as 5-sulfobenzophenone; benzotriazole series such as 2- (2′-hydroxy-5-methylphenyl) benzotriazole; hindered amines such as phenyl salsylate and pt-butylphenyl salsylate An ultraviolet ray absorbing material is used, and in a normal case, about 1 to 20 wt% is blended with respect to the base resin.
[0025]
The thickness of such a transparent high light-resistant film 3 is preferably about 6 to 200 μm.
[0026]
As the ultraviolet absorbing EVA adhesive sheet 4, an EVA resin composition formed by blending an EVA resin with an ultraviolet absorber, a crosslinking agent, and other additives as required can be used.
[0027]
Below, the EVA resin composition suitable as a film-forming raw material of the ultraviolet-absorbing EVA adhesive sheet 4 according to the present invention will be described below.
[0028]
In order to improve weather resistance, this EVA resin composition is blended with a crosslinking agent to have a crosslinked structure. As this crosslinking agent, an organic peroxide that generates radicals at 100 ° C. or higher is generally used. In particular, in consideration of stability at the time of blending, those having a decomposition temperature with a half-life of 10 hours are preferably 70 ° C. or higher. Examples of such an organic peroxide include 2,5-dimethylhexane; 2,5-dihydroperoxide; 2,5-dimethyl-2,5-di (t-butylperoxy) hexane; -T-butyl peroxide; t-dicumyl peroxide; 2,5-dimethyl-2,5-di (t-butylperoxy) hexyne; dicumyl peroxide; α, α'-bis (t-butylperoxide Oxyisopropyl) benzene; n-butyl-4,4-bis (t-butylperoxy) butane; 2,2-bis (t-butylperoxy) butane; 1,1-bis (t-butylperoxy) cyclohexane 1,1-bis (t-butylperoxy) 3,3,5-trimethylcyclohexane; t-butylperoxybenzoate; benzoyl peroxide, etc. Kill. The compounding amount of these organic peroxides is generally 5 parts by weight or less, preferably 1 to 3 parts by weight with respect to 100 parts by weight of the EVA resin.
[0029]
In addition, this EVA resin composition is blended with an ultraviolet absorber for imparting light resistance to the ultraviolet absorbing EVA adhesive sheet 4, and as this ultraviolet absorber, 2-hydroxy-4-octoxybenzophenone, Benzophenone series such as 2-hydroxy-methoxy-5-sulfobenzophenone; benzotriazole series such as 2- (2′-hydroxy-5-methylphenyl) benzotriazole; phenyl salsylate, pt-butylphenyl salsi A hindered amine-based ultraviolet absorber such as a rate may be mentioned. In a normal case, about 1 to 50 parts by weight is blended with 100 parts by weight of the EVA resin.
[0030]
A silane coupling agent can be added to the EVA resin for the purpose of improving the adhesive strength between the transparent high moisture-proof film 2 and the transparent high light-resistant film 3. Known silane coupling agents for this purpose are, for example, γ-chloropropyltrimethoxysilane; vinyltrichlorosilane; vinyltriethoxysilane; vinyl-tris- (β-methoxyethoxy) silane; γ-methacryloxy. Propyltrimethoxysilane; β- (3,4-ethoxycyclohexyl) ethyltrimethoxysilane; γ-glycidoxypropyltrimethoxysilane; vinyltriacetoxysilane; γ-mercaptopropyltrimethoxysilane; γ-aminopropyltrimethoxysilane N-β- (aminoethyl) -γ-aminopropyltrimethoxysilane and the like can be mentioned. The amount of these silane coupling agents is generally 5 parts by weight or less, preferably 0.1 to 2 parts by weight, based on 100 parts by weight of the EVA resin.
[0031]
Furthermore, a crosslinking aid can be added to the EVA resin in order to improve the gel fraction of the EVA resin and improve the durability. Examples of crosslinking aids provided for this purpose include trifunctional crosslinking aids such as triallyl isocyanurate; triallyl isocyanate as well as monofunctional crosslinking aids such as NK esters. it can. The amount of these crosslinking aids is generally 10 parts by weight or less, preferably 1 to 5 parts by weight with respect to 100 parts by weight of the EVA resin.
[0032]
Furthermore, hydroquinone; hydroquinone monomethyl ether; p-benzoquinone; methyl hydroquinone, etc. can be added for the purpose of improving the stability of the EVA resin, and the blending amount thereof is generally 5 parts by weight with respect to 100 parts by weight of the EVA resin. It is as follows.
[0033]
In addition to the above, a coloring agent, an anti-aging agent, a discoloration preventing agent, and the like can be further added to the EVA resin composition as necessary. Examples of the colorant include inorganic pigments such as metal oxides and metal powders, and organic pigments such as azo-based, phthalocyanine-based, additive-based, acidic or basic dye-based lakes. Antiaging agents include amines; phenols; bisphenyls; hindered amines, such as di-t-butyl-p-cresol; bis (2,2,6,6-tetramethyl-4-piperazyl). ) Sebacate.
[0034]
The thickness of the ultraviolet absorbing EVA adhesive sheet 4 made of such an EVA resin composition is preferably about 5 to 50 μm.
[0035]
The cover material 1 for solar cells of the present invention has an ultraviolet absorbing EVA adhesive sheet 4 interposed between the transparent high moisture-proof film 2 and the transparent high light resistant film 3 described above, and the bonding conditions of the ultraviolet absorbing EVA adhesive sheet 4 are as follows. It can be easily manufactured by heat-pressing or the like by bonding and integrating.
[0036]
In addition, as for the cover material of this invention, it is preferable that the transparent highly light-resistant film 3 is arrange | positioned at the surface side, and the transparent highly moisture-proof film 2 is arrange | positioned at the inner surface side.
[0037]
In order to manufacture the solar cell of the present invention using such a cover material for solar cells, sealing may be performed using the cover material of the present invention instead of the glass plate of the conventional solar cell shown in FIG. However, in that case, it is preferable that the cover material of the present invention is laminated and integrated with the sealing EVA film in advance.
[0038]
As shown in FIG. 4, the solar cell cover
[0039]
This solar cell cover material /
[0040]
As shown in FIG. 5, the solar cell 10 of the present invention uses a solar cell cover material /
[0041]
Note that the EVA resin composition suitable as a raw material for forming an EVA film as a sealing film used in the solar cell of the present invention is the same as the EVA resin composition suitable as a raw material for forming the ultraviolet absorbing EVA adhesive sheet 4 described above. It is.
[0042]
This EVA resin composition for a sealing film is also crosslinked by adding 5 parts by weight or less, preferably 1 to 3 parts by weight of the same crosslinking agent as described above to 100 parts by weight of the EVA resin in order to improve durability. Give structure.
[0043]
Moreover, as a sealing film of a solar cell, for the purpose of improving the adhesive force with a power generating element, 5 parts by weight or less, preferably 0.1 to 10 parts by weight of the above-mentioned silane coupling agent with respect to 100 parts by weight of EVA resin is used. 2 parts by weight can be blended.
[0044]
Furthermore, in order to improve the gel fraction of EVA resin and improve durability, the above-mentioned crosslinking aid is added to EVA resin in an amount of 10 parts by weight or less, preferably 1 to 5 parts by weight based on 100 parts by weight of EVA resin. be able to.
[0045]
Furthermore, for the purpose of improving the stability of the EVA resin, 5 parts by weight or less of hydroquinone; hydroquinone monomethyl ether; p-benzoquinone;
[0046]
Furthermore, if necessary, in addition to the above, the same colorant, ultraviolet absorber, anti-aging agent, anti-discoloration agent and the like as described above can be added.
[0047]
【The invention's effect】
As described above in detail, the solar cell cover material of the present invention is a transparent resin film having both good moisture resistance and light resistance, and therefore, by using this solar cell cover material as a transparent protective member for solar cells, It is possible to provide a solar cell that is lightweight and excellent in impact resistance, and that has no problem of ultraviolet light deterioration and rusting and excellent durability.
[0048]
Since the solar cell cover material combined sealing film of the present invention is formed by integrating the solar cell cover material of the present invention and the EVA film, the solar cell cover material combined sealing film is By using it, it is possible to efficiently produce a light-weight, impact-resistant and durable solar cell with good workability.
[0049]
The solar cell of the present invention uses the solar cell cover material of the present invention as a front side and / or back side transparent protective member, and is lightweight and excellent in impact resistance and durability.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an embodiment of a solar cell cover material of the present invention.
FIG. 2 is a cross-sectional view showing an embodiment of a transparent high moisture-proof film according to the present invention.
FIG. 3 is a cross-sectional view showing an embodiment of a transparent high moisture-proof film according to the present invention.
FIG. 4 is a cross-sectional view showing an embodiment of a sealing film for a solar cell cover material according to the present invention.
FIG. 5 is a cross-sectional view showing an embodiment of the solar cell of the present invention.
FIG. 6 is a cross-sectional view showing a conventional solar cell.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cover material for solar cells 2 Transparent high moisture-proof film 3 Transparent high light-resistant film 4 UV absorption EVA
Claims (6)
前記透明高防湿フィルムが、無機酸化物をコーティングした透明フィルムの２枚を該コーティング面同士を貼り合わせてなる積層フィルムよりなり、
前記透明高耐光フィルムが、フッ素樹脂フィルムであるか、又は、アクリル、ポリカーボネート、ポリエチレンテレフタレート及びポリエチレンナフタレートよりなる１種又は２種以上の樹脂に紫外線吸収剤を練り込んだ樹脂組成物を成膜してなることを特徴とする太陽電池用カバー材。A cover material used as a transparent protective member for a solar cell, comprising a transparent high light-resistant film and a transparent high moisture-proof film, an ethylene-vinyl acetate copolymer resin adhesive containing an ultraviolet absorber and a crosslinking agent. Ri name was laminated and integrated,
The transparent high moisture-proof film is a laminated film formed by laminating two coated transparent films coated with an inorganic oxide.
The transparent high light resistance film is a fluororesin film, or a resin composition in which an ultraviolet absorber is kneaded into one or more kinds of resins made of acrylic, polycarbonate, polyethylene terephthalate and polyethylene naphthalate is formed into a film. solar cells cover member, characterized in that to become to.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34722698A JP3978912B2 (en) | 1998-12-07 | 1998-12-07 | Solar cell cover material, sealing film, and solar cell |
| PCT/JP1999/006725 WO2000035025A1 (en) | 1998-12-07 | 1999-12-01 | Cover material for solar cell, sealing film and solar cell |
| ES99973354T ES2238877T3 (en) | 1998-12-07 | 1999-12-01 | SOLAR CELL COATING. |
| DE69924025T DE69924025T2 (en) | 1998-12-07 | 1999-12-01 | COVER MATERIAL FOR SOLAR CELL |
| EP99973354A EP1150357B1 (en) | 1998-12-07 | 1999-12-01 | Cover material for solar cell |
| US09/800,526 US6441299B2 (en) | 1998-12-07 | 2001-03-08 | Covering member for solar battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34722698A JP3978912B2 (en) | 1998-12-07 | 1998-12-07 | Solar cell cover material, sealing film, and solar cell |
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| Publication Number | Publication Date |
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| JP2000174298A JP2000174298A (en) | 2000-06-23 |
| JP3978912B2 true JP3978912B2 (en) | 2007-09-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34722698A Expired - Fee Related JP3978912B2 (en) | 1998-12-07 | 1998-12-07 | Solar cell cover material, sealing film, and solar cell |
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| Country | Link |
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| JP (1) | JP3978912B2 (en) |
Cited By (1)
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| WO2012118160A1 (en) | 2011-03-03 | 2012-09-07 | 旭硝子株式会社 | Adhesive composition, laminated body, and solar battery module |
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| JP3978911B2 (en) * | 1998-12-07 | 2007-09-19 | 株式会社ブリヂストン | Solar cell cover material, sealing film, and solar cell |
| JP2004247390A (en) * | 2003-02-12 | 2004-09-02 | Dainippon Printing Co Ltd | Rear face protecting sheet for solar cell module, and solar cell module using it |
| JP2004288677A (en) * | 2003-03-19 | 2004-10-14 | Sharp Corp | Solar cell module subassembly and double-glazed solar cell module |
| JP4526022B2 (en) * | 2004-12-03 | 2010-08-18 | 三井・デュポンポリケミカル株式会社 | Laminate and its use |
| KR20150052338A (en) * | 2006-08-04 | 2015-05-13 | 아르끄마 프랑스 | Photovoltaic modules having a polyvinylidene fluoride surface |
| CN100505367C (en) * | 2007-01-22 | 2009-06-24 | 铼德科技股份有限公司 | organic solar cell and manufacturing method thereof |
| US20120097220A1 (en) | 2009-04-30 | 2012-04-26 | Mitsubishi Plastics, Inc. | Sheet for solar cell, and solar cell module |
| DE102009003225A1 (en) * | 2009-05-19 | 2010-11-25 | Evonik Degussa Gmbh | Transparent, weather-resistant barrier film, production by lamination, extrusion lamination or extrusion coating |
| US20130206214A1 (en) * | 2010-08-31 | 2013-08-15 | Mitsubishi Plastics, Inc. | Solar battery cover film for and solar battery module manufactured using same |
| JP5719726B2 (en) * | 2010-08-31 | 2015-05-20 | 三菱樹脂株式会社 | Front protective sheet for solar cell and solar cell module produced using the same |
| WO2012029465A1 (en) * | 2010-08-31 | 2012-03-08 | 三菱樹脂株式会社 | Front surface protective sheet for solar cell and solar cell module produced using same |
| JP2013537001A (en) * | 2010-08-31 | 2013-09-26 | グローバル ソーラー エネルギー、インク． | Flexible building-integrated photovoltaic power generation structure |
| CN101982886A (en) * | 2010-09-13 | 2011-03-02 | 东莞市华源光电科技有限公司 | A kind of manufacturing process of PET laminated solar panel |
| JP5719727B2 (en) * | 2010-09-29 | 2015-05-20 | 三菱樹脂株式会社 | Solar cell front protective sheet / sealing material laminate and solar cell module produced using the same |
| JP5673936B2 (en) * | 2011-01-06 | 2015-02-18 | 大日本印刷株式会社 | Front sheet for solar cell module, solar cell module using the same, and method for producing front sheet for solar cell module |
| WO2012157962A2 (en) | 2011-05-16 | 2012-11-22 | 주식회사 엘지화학 | Protection film for solar cell application and solar cell having same |
| KR101278916B1 (en) | 2011-10-07 | 2013-06-26 | 한국철강 주식회사 | Thin film solar module |
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| JPS60201652A (en) * | 1984-03-26 | 1985-10-12 | Toppan Printing Co Ltd | Back protection sheet for solar cell module |
| JP3267738B2 (en) * | 1993-05-07 | 2002-03-25 | キヤノン株式会社 | Solar cell module |
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| JPH0774378A (en) * | 1993-09-01 | 1995-03-17 | Mitsui Toatsu Chem Inc | Solar cell sheet |
| US5650019A (en) * | 1993-09-30 | 1997-07-22 | Canon Kabushiki Kaisha | Solar cell module having a surface coating material of three-layered structure |
| JP3135477B2 (en) * | 1994-04-28 | 2001-02-13 | キヤノン株式会社 | Solar cell module |
| JP2756082B2 (en) * | 1994-04-28 | 1998-05-25 | キヤノン株式会社 | Method of manufacturing solar cell module |
| JP2915327B2 (en) * | 1995-07-19 | 1999-07-05 | キヤノン株式会社 | Solar cell module and method of manufacturing the same |
| JP3701398B2 (en) * | 1996-07-12 | 2005-09-28 | 大日本印刷株式会社 | Transparent composite film |
| JP3978911B2 (en) * | 1998-12-07 | 2007-09-19 | 株式会社ブリヂストン | Solar cell cover material, sealing film, and solar cell |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2012118160A1 (en) | 2011-03-03 | 2012-09-07 | 旭硝子株式会社 | Adhesive composition, laminated body, and solar battery module |
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