KR20210024847A - A composite adhesive film for photovoltaic cell - Google Patents
A composite adhesive film for photovoltaic cell Download PDFInfo
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- KR20210024847A KR20210024847A KR1020190104548A KR20190104548A KR20210024847A KR 20210024847 A KR20210024847 A KR 20210024847A KR 1020190104548 A KR1020190104548 A KR 1020190104548A KR 20190104548 A KR20190104548 A KR 20190104548A KR 20210024847 A KR20210024847 A KR 20210024847A
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- adhesive film
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- ethylene
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- 239000002313 adhesive film Substances 0.000 title claims abstract description 56
- 239000002131 composite material Substances 0.000 title claims abstract description 15
- -1 carbodiimide compound Chemical class 0.000 claims abstract description 30
- 239000000203 mixture Substances 0.000 claims abstract description 28
- 239000004711 α-olefin Substances 0.000 claims abstract description 24
- 229920000089 Cyclic olefin copolymer Polymers 0.000 claims abstract description 22
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 12
- 239000004611 light stabiliser Substances 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims description 9
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 claims description 3
- MMCOUVMKNAHQOY-UHFFFAOYSA-L oxido carbonate Chemical group [O-]OC([O-])=O MMCOUVMKNAHQOY-UHFFFAOYSA-L 0.000 claims description 3
- 125000000219 ethylidene group Chemical group [H]C(=[*])C([H])([H])[H] 0.000 claims description 2
- 125000003386 piperidinyl group Chemical group 0.000 abstract 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 23
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 23
- 238000003490 calendering Methods 0.000 description 6
- 238000002156 mixing Methods 0.000 description 5
- BRQMAAFGEXNUOL-UHFFFAOYSA-N 2-ethylhexyl (2-methylpropan-2-yl)oxy carbonate Chemical compound CCCCC(CC)COC(=O)OOC(C)(C)C BRQMAAFGEXNUOL-UHFFFAOYSA-N 0.000 description 4
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 4
- 239000005977 Ethylene Substances 0.000 description 4
- 229920001577 copolymer Polymers 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 230000014759 maintenance of location Effects 0.000 description 4
- 229940116351 sebacate Drugs 0.000 description 4
- CXMXRPHRNRROMY-UHFFFAOYSA-L sebacate(2-) Chemical compound [O-]C(=O)CCCCCCCCC([O-])=O CXMXRPHRNRROMY-UHFFFAOYSA-L 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 150000001451 organic peroxides Chemical class 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- 238000004383 yellowing Methods 0.000 description 3
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 2
- AFFLGGQVNFXPEV-UHFFFAOYSA-N 1-decene Chemical compound CCCCCCCCC=C AFFLGGQVNFXPEV-UHFFFAOYSA-N 0.000 description 2
- CRSBERNSMYQZNG-UHFFFAOYSA-N 1-dodecene Chemical compound CCCCCCCCCCC=C CRSBERNSMYQZNG-UHFFFAOYSA-N 0.000 description 2
- LIKMAJRDDDTEIG-UHFFFAOYSA-N 1-hexene Chemical compound CCCCC=C LIKMAJRDDDTEIG-UHFFFAOYSA-N 0.000 description 2
- KWKAKUADMBZCLK-UHFFFAOYSA-N 1-octene Chemical compound CCCCCCC=C KWKAKUADMBZCLK-UHFFFAOYSA-N 0.000 description 2
- WSSSPWUEQFSQQG-UHFFFAOYSA-N 4-methyl-1-pentene Chemical compound CC(C)CC=C WSSSPWUEQFSQQG-UHFFFAOYSA-N 0.000 description 2
- IAQRGUVFOMOMEM-UHFFFAOYSA-N but-2-ene Chemical compound CC=CC IAQRGUVFOMOMEM-UHFFFAOYSA-N 0.000 description 2
- 150000001718 carbodiimides Chemical class 0.000 description 2
- 238000007334 copolymerization reaction Methods 0.000 description 2
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 2
- YWAKXRMUMFPDSH-UHFFFAOYSA-N pentene Chemical compound CCCC=C YWAKXRMUMFPDSH-UHFFFAOYSA-N 0.000 description 2
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 125000005916 2-methylpentyl group Chemical group 0.000 description 1
- PKXHXOTZMFCXSH-UHFFFAOYSA-N 3,3-dimethylbut-1-ene Chemical compound CC(C)(C)C=C PKXHXOTZMFCXSH-UHFFFAOYSA-N 0.000 description 1
- YHQXBTXEYZIYOV-UHFFFAOYSA-N 3-methylbut-1-ene Chemical compound CC(C)C=C YHQXBTXEYZIYOV-UHFFFAOYSA-N 0.000 description 1
- LDTAOIUHUHHCMU-UHFFFAOYSA-N 3-methylpent-1-ene Chemical compound CCC(C)C=C LDTAOIUHUHHCMU-UHFFFAOYSA-N 0.000 description 1
- 229920002799 BoPET Polymers 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- SNRUBQQJIBEYMU-UHFFFAOYSA-N Dodecane Natural products CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000012986 chain transfer agent Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 125000002704 decyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- XNMQEEKYCVKGBD-UHFFFAOYSA-N dimethylacetylene Natural products CC#CC XNMQEEKYCVKGBD-UHFFFAOYSA-N 0.000 description 1
- 229940069096 dodecene Drugs 0.000 description 1
- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 125000003187 heptyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 125000001972 isopentyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])C([H])([H])* 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 125000002960 margaryl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- TVMXDCGIABBOFY-UHFFFAOYSA-N n-Octanol Natural products CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 1
- 125000001400 nonyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000000913 palmityl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229920000307 polymer substrate Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 125000004079 stearyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 238000009281 ultraviolet germicidal irradiation Methods 0.000 description 1
- 150000003682 vanadium compounds Chemical class 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J131/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, of carbonic acid, or of a haloformic acid; Adhesives based on derivatives of such polymers
- C09J131/02—Homopolymers or copolymers of esters of monocarboxylic acids
- C09J131/04—Homopolymers or copolymers of vinyl acetate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
- C08K5/0025—Crosslinking or vulcanising agents; including accelerators
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
- C08K5/005—Stabilisers against oxidation, heat, light, ozone
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/14—Peroxides
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/29—Compounds containing one or more carbon-to-nitrogen double bonds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
- C08L23/0807—Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
- C08L23/0815—Copolymers of ethene with aliphatic 1-olefins
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
- C09J2203/322—Applications of adhesives in processes or use of adhesives in the form of films or foils for the production of solar panels
Abstract
Description
본 발명은 에틸렌-α-올레핀 공중합체와 에틸렌-비닐 아세테이트 공중합체 (EVA)의 블렌드를 기본으로 하는 광전지 용 복합 접착 필름 및 상기 접착 필름을 사용하여 밀봉 된 광전지에 관한 것이다.The present invention relates to a composite adhesive film for photovoltaic cells based on a blend of an ethylene-α-olefin copolymer and an ethylene-vinyl acetate copolymer (EVA) and a photovoltaic cell sealed using the adhesive film.
금세기 초 화석 연료를 대신해 재생 가능한 대체 에너지 원으로서 태양 에너지는 광범위한 관심을 받아왔다. 특히, 최근, 환경 보호 목적으로 제조된 광전지(photovoltatic cell) 어셈블리는 다양한 분야에서 빠르게 확산되고 있다.At the beginning of this century, solar energy has received widespread attention as a renewable alternative energy source for fossil fuels. In particular, recently, photovoltaic cell assemblies manufactured for environmental protection purposes are rapidly spreading in various fields.
광전지는 일반적으로 유리 기판 표면 투명 보호 부재, 광전지용 표면 측 접착 필름, 실리콘 발전 소자와 같은 광전지 유닛, 광전지용 후면 접착 필름 및 후면 보호 부재를 순차적으로 적층하여 제조된다.Photovoltaic cells are generally manufactured by sequentially laminating a glass substrate surface transparent protective member, a surface-side adhesive film for a photovoltaic cell, a photovoltaic unit such as a silicon power generation device, a rear adhesive film for a photovoltaic cell, and a rear protective member.
이러한 광전지에서 밀봉을 위한 접착 필름으로서는, 유기 과산화물 등의 가교제를 배합하는 주성분으로서, 접착성 및 투명성이 우수한 에틸렌-아세트산 비닐 공중합체를 취하여 제조한 접착 필름이 일반적이다. 발전 효율을 향상시키는 관점에서, 광전지에 입사된 광을 가능한 효율적으로 광전지 셀 유닛으로 포획하는 것이 강하게 요구된다. 따라서, 밀봉용 EVA 박막은 가능한 한 높은 투명도를 갖는 EVA 박막이 바람직하고, 입사되는 햇빛을 흡수 또는 반사하지 않으며, 모든 햇빛이 실질적으로 투과하게 할 것이다.As an adhesive film for sealing in such a photovoltaic cell, an adhesive film prepared by taking an ethylene-vinyl acetate copolymer having excellent adhesion and transparency as a main component containing a crosslinking agent such as an organic peroxide is generally used. From the viewpoint of improving the power generation efficiency, it is strongly required to capture the light incident on the photovoltaic cell into the photovoltaic cell unit as efficiently as possible. Therefore, the EVA thin film for sealing is preferably an EVA thin film having as high transparency as possible, and does not absorb or reflect incident sunlight, and will allow all sunlight to be substantially transmitted.
종래 기술의 상기 문제점을 고려하여, 본 발명은 부식을 피하고 황변화를 효과적으로 억제할 수 있고 우수한 절연 특성을 갖는 광전지 밀봉용 접착 필름을 제공하고자 한다. 또한, 본 발명은 접착 필름을 사용함으로써 발전 효율을 향상시키고 외관 및 절연성이 우수한 광전지를 제공하는 것을 목적으로 한다.In view of the above problems of the prior art, the present invention is to provide an adhesive film for sealing a photovoltaic cell, which can avoid corrosion, effectively suppress the yellow change, and have excellent insulating properties. In addition, it is an object of the present invention to improve power generation efficiency by using an adhesive film and to provide a photovoltaic cell having excellent appearance and insulation properties.
상기 목적을 달성하기 위해, 본 발명의 발명자는 집중적인 연구를 수행하였고, 그 결과 EVA와 에틸렌-α-올레핀 공중합체의 블렌드를 중합체 기재로서 사용하고 여기에 가교제, 특정량의 카르보디이미드 화합물 및 특정 구조를 갖는 광안정제를 첨가함으로써 외관이 양호하고 절연성이 우수한 광전지를 얻을 수 있고, 산 부식을 피할 수 있고 황변화를 효과적으로 억제 할 수 있었다.In order to achieve the above object, the inventors of the present invention conducted intensive research, as a result of which a blend of EVA and an ethylene-α-olefin copolymer was used as a polymer substrate, and a crosslinking agent, a specific amount of a carbodiimide compound, and By adding a light stabilizer having a specific structure, a photovoltaic cell having good appearance and excellent insulation can be obtained, acid corrosion can be avoided, and sulfur change can be effectively suppressed.
구체적으로, 본 발명의 광전지용 복합 접착 필름은 EVA와 에틸렌-α-올레핀 공중합체의 블렌드, 가교제, 광안정제 및 카르보디이미드 화합물을 포함한다.Specifically, the composite adhesive film for photovoltaic cells of the present invention includes a blend of EVA and an ethylene-α-olefin copolymer, a crosslinking agent, a light stabilizer, and a carbodiimide compound.
에틸렌-α-올레핀 공중합체는 EVA와 에틸렌-α-올레핀 공중합체의 블렌드 100 중량부를 기준으로 50 내지 90 중량부의 양으로 함유된다.The ethylene-α-olefin copolymer is contained in an amount of 50 to 90 parts by weight based on 100 parts by weight of the blend of EVA and the ethylene-α-olefin copolymer.
본 발명에 따른 광전지 용 복합 접착 필름은 EVA 공중합체에 특정 함량의 카르보디이미드 화합물을 배합함으로써, 광전지 내부에서 생성된 산을 충분히 흡수 할 수 있고, 전도성 와이어 및 전극의 부식을 방지하면서 황변화를 피할 수 있다. 또한, 특정 구조의 광안정제를 배합함으로써, 장기간 사용시 황변화 발생을 효과적으로 억제하고 내광성 및 내열성을 향상시킬 수 있다.The composite adhesive film for a photovoltaic cell according to the present invention can sufficiently absorb the acid generated inside the photovoltaic cell by mixing a specific content of a carbodiimide compound in the EVA copolymer, and prevents the corrosion of the conductive wire and electrode while preventing the yellow change. Can be avoided. In addition, by blending a light stabilizer having a specific structure, it is possible to effectively suppress the occurrence of yellowing during long-term use and improve light resistance and heat resistance.
이하, 본 발명의 광전지(photovoltatic cell) 용 접착 필름에 대하여 상세하게 설명한다.Hereinafter, the adhesive film for a photovoltatic cell of the present invention will be described in detail.
본 발명에 사용되는 EVA 공중합체(copolymer)는 특별히 제한되지 않으며, 당 업계에 공지된 임의의 EVA 공중합체가 사용될 수 있다. 예로서, 본 발명에서 사용되는 EVA 공중합체는, 예를 들어, 용매 또는 연쇄 이동제(chain transfer agent)의 존재 또는 부재하에 100 내지 300℃의 온도에서 라디칼 개시제(radical initiator)의 존재하에 공중합에 의해 제조될 수 있다.The EVA copolymer used in the present invention is not particularly limited, and any EVA copolymer known in the art may be used. As an example, the EVA copolymer used in the present invention is, for example, by copolymerization in the presence or absence of a solvent or a chain transfer agent at a temperature of 100 to 300°C in the presence of a radical initiator. Can be manufactured.
본 발명의 에틸렌-α-올레핀 공중합체로서는 에틸렌과 C3-20α-올레핀의 공중합에 의해 얻을 수 있다. C3-20 α-올레핀으로서, 프로필렌, 1-부텐, 2-부텐, 1-펜텐, 3-메틸-1-부텐, 3,3-디메틸-1-부텐, 1-헥센, 4-메틸-1-펜텐, 3-메틸-1-펜텐, 1-옥텐, 1-데센, 1-도데센 등이 전형적으로 사용될 수 있다.The ethylene-α-olefin copolymer of the present invention can be obtained by copolymerization of ethylene and C 3-20 α-olefin. As C 3-20 α-olefin, propylene, 1-butene, 2-butene, 1-pentene, 3-methyl-1-butene, 3,3-dimethyl-1-butene, 1-hexene, 4-methyl-1 -Pentene, 3-methyl-1-pentene, 1-octene, 1-decene, 1-dodecene and the like can typically be used.
에틸렌-α-올레핀 공중합체는 당업계에 공지된 임의의 방법에 의해 제조될 수 있다. 예로서, 촉매로서 지글러 촉매, 바나듐 화합물, 메탈로센(metallocene) 화합물 등의 존재하에 중합하여 얻은 생성물을 사용할 수 있다.The ethylene-α-olefin copolymer can be prepared by any method known in the art. For example, as a catalyst, a product obtained by polymerization in the presence of a Ziegler catalyst, a vanadium compound, a metallocene compound, or the like can be used.
EVA와 에틸렌-α-올레핀 공중합체의 블렌드(blend) 100 중량부를 기준으로, 에틸렌-α-올레핀 공중합체는 50-90 중량부, 바람직하게는 50-88 중량부, 보다 바람직하게는 50-85 중량부, 특히 바람직하게는 70-80 중량부로 포함된다.Based on 100 parts by weight of the blend of EVA and ethylene-α-olefin copolymer, the ethylene-α-olefin copolymer is 50-90 parts by weight, preferably 50-88 parts by weight, more preferably 50-85 parts by weight. It is included in parts by weight, particularly preferably 70-80 parts by weight.
본 발명의 가교제로(crosslinking agent)는 유기 과산화물계(organic peroxide-based) 가교제를 사용할 수 있다.As the crosslinking agent of the present invention, an organic peroxide-based crosslinking agent may be used.
유기 과산화물 계 가교제로서, 퍼옥시카보네이트(peroxycarbonate)가 전형적으로 사용된다.As the organic peroxide-based crosslinking agent, peroxycarbonate is typically used.
예로서, 퍼옥시카보네이트는 2-메틸아밀 메틸퍼옥시카보네이트(2-methylamyl methylperoxycarbonate), 3-메틸아밀 메틸퍼옥시카보네이트, 2-에틸헥실 메틸퍼옥시카보네이트, 2-메틸펜틸 에틸퍼옥시카보네이트, 3-메틸펜틸 에틸퍼옥시카보네이트, 2-에틸헥실 에틸퍼옥시카보네이트, 2-메틸펜틸 프로필퍼옥시카보네이트, 3-메틸아밀 프로필퍼옥시카보네이트, 2-에틸헥실 프로필퍼옥시카보네이트, 2-메틸펜틸 tert-부틸퍼옥시카보네이트, 3-메틸펜틸 tert- 부틸퍼옥시카보네이트 및 2-에틸 헥실 tert-부틸퍼옥시카보네이트로 이루어진 군에서 선택될 수 있다.As an example, peroxycarbonate is 2-methylamyl methylperoxycarbonate, 3-methylamyl methylperoxycarbonate, 2-ethylhexyl methylperoxycarbonate, 2-methylpentyl ethylperoxycarbonate, 3 -Methylpentyl ethylperoxycarbonate, 2-ethylhexyl ethylperoxycarbonate, 2-methylpentyl propylperoxycarbonate, 3-methylamyl propylperoxycarbonate, 2-ethylhexyl propylperoxycarbonate, 2-methylpentyl tert- It may be selected from the group consisting of butyl peroxy carbonate, 3-methylpentyl tert-butyl peroxy carbonate, and 2-ethyl hexyl tert-butyl peroxy carbonate.
가교제는 전형적으로 EVA와 에틸렌-α-올레핀 공중합체의 블렌드 100 중량부를 기준으로 0.3 내지 1.5 중량부, 바람직하게는 0.35 내지 1.1 중량부, 보다 바람직하게는 0.4 내지 0.55 중량부의 양으로 사용된다.The crosslinking agent is typically used in an amount of 0.3 to 1.5 parts by weight, preferably 0.35 to 1.1 parts by weight, more preferably 0.4 to 0.55 parts by weight, based on 100 parts by weight of the blend of EVA and ethylene-α-olefin copolymer.
본 발명의 광안정제는 일반적으로 하기 화학식 1로 표시되는 구조를 갖는 화합물이다:The light stabilizer of the present invention is a compound having a structure generally represented by the following formula (1):
여기서 R은 수소 원자를 나타내고, R1, R2, R3 및 R4는 각각 C1-5 알킬을 나타낸다.Wherein R represents a hydrogen atom, and R 1 , R 2 , R 3 and R 4 each represent C 1-5 alkyl.
구체적으로, R1, R2, R3 및 R4는 각각 독립적으로 메틸, 에틸, 프로필 및 부틸로 이루어진 군으로부터 선택된다. R은 메틸, 에틸, 프로필, 이소프로필, 부틸, sec-부틸, tert-부틸, 펜틸, 이소펜틸, 헥실, 헵틸, n-옥틸, 이소-옥틸, tert-옥틸, 노닐, 이소-노닐, 데실, 도데실, 헥사데실, 헵타데실 및 옥타데실로 이루어진 군에서 선택된다. Specifically, R 1 , R 2 , R 3 and R 4 are each independently selected from the group consisting of methyl, ethyl, propyl and butyl. R is methyl, ethyl, propyl, isopropyl, butyl, sec-butyl, tert-butyl, pentyl, isopentyl, hexyl, heptyl, n-octyl, iso-octyl, tert-octyl, nonyl, iso-nonyl, decyl, It is selected from the group consisting of dodecyl, hexadecyl, heptadecyl and octadecyl.
광안정제는 EVA와 에틸렌-α-올레핀 공중합체의 블렌드 100 중량부를 기준으로 0.2 내지 2.0 중량부, 바람직하게는 0.5 내지 1.5 중량부, 보다 바람직하게는 0.7 내지 1.2 중량부의 양으로 함유된다. 광안정제가 0.2 중량부 미만으로 함유되면, 충분한 내광성 및 내열성을 얻는 것이 어렵다. 광안정제가 0.2 중량부를 초과하여 함유되면, 접착 필름 황변화가 발생할 수 있다.The light stabilizer is contained in an amount of 0.2 to 2.0 parts by weight, preferably 0.5 to 1.5 parts by weight, more preferably 0.7 to 1.2 parts by weight, based on 100 parts by weight of the blend of EVA and ethylene-α-olefin copolymer. When the light stabilizer is contained in an amount of less than 0.2 parts by weight, it is difficult to obtain sufficient light resistance and heat resistance. When the light stabilizer is contained in an amount exceeding 0.2 parts by weight, yellowing of the adhesive film may occur.
본 발명의 카르보디이미드(carbodiimide) 화합물은 전형적으로 하기 화학식으로 표시되는 구조를 갖는다:The carbodiimide compounds of the present invention typically have a structure represented by the following formula:
R5-N = C = N-(R6-N = C = N-)nR7,R 5 -N = C = N-(R 6 -N = C = N-) n R 7 ,
여기서, R5가 이소 프로필이고, R7이 3차 부틸(tertiary butyl)이고, R6이 에틸리덴(ethylidene)이고, n이 500 미만의 양의 정수이고, 보다 바람직하게는 1 내지 50의 정수이다.Here, R 5 is isopropyl, R 7 is tertiary butyl, R 6 is ethylidene, n is a positive integer less than 500, more preferably an integer of 1 to 50 to be.
상기 구조를 갖는 카르보디이미드 화합물을 EVA 공중합체에 배합함으로써, 광전지 셀에서 발생하는 산성 물질을 충분히 흡수 할 수 있어 우수한 내구성을 달성할 수 있다.By blending the carbodiimide compound having the above structure into the EVA copolymer, it is possible to sufficiently absorb acidic substances generated in the photovoltaic cell, thereby achieving excellent durability.
상기 카르보디이미드 화합물은 당업계에 공지된 방법에 의해 제조될 수 있다. 예로서, 유기 인계 촉매의 존재하에 케톤 용매 중에서 원료로서 디이소시아네이트(diisocynate) 화합물을 사용하여 탈탄 축합(decarbonation condensation)에 의해 제조 될 수 있다.The carbodiimide compound can be prepared by a method known in the art. For example, it can be prepared by decarbonation condensation using a diisocynate compound as a raw material in a ketone solvent in the presence of an organic phosphorus catalyst.
본 발명의 필름은 EVA 및 에틸렌-α-올레핀 공중합체의 블렌드 100 중량부를 기준으로 카르보디이미드 화합물을 0.1 내지 0.35 중량부, 바람직하게는 0.1 내지 0.25 중량부, 더욱 바람직하게는 0.15 내지 0.22 중량부로 함유한다. 카르보디이미드가 0.1 중량부 미만으로 함유되면, 생성된 산이 충분히 흡수되지 않아 전도성 와이어 및 전극의 부식이 야기될 수 있다. 카르보디이미드가 0.35 중량부를 초과하여 함유되면, 황변화가 야기 될 수 있다.The film of the present invention contains 0.1 to 0.35 parts by weight of the carbodiimide compound, preferably 0.1 to 0.25 parts by weight, more preferably 0.15 to 0.22 parts by weight, based on 100 parts by weight of the blend of EVA and ethylene-α-olefin copolymer. Contains. If the carbodiimide is contained in an amount of less than 0.1 part by weight, the generated acid is not sufficiently absorbed, which may cause corrosion of the conductive wire and electrode. If carbodiimide is contained in an amount exceeding 0.35 parts by weight, yellow change may be caused.
본 발명의 광전지 접착 필름은 일반적으로 사용되는 방법에 의해 제조될 수 있으며, 바람직하게는 캘린더 롤(calender roll), 반죽기(kneader), 밴버리 믹서(Banbury mixer), 압출기 등을 통한 용융-블렌딩(melt-blending)에 의해 제조된다. 연속 생산을 수행할 수 있는 압출기로 제조하는 것이 특히 바람직하다.The photovoltaic adhesive film of the present invention can be prepared by a method generally used, and preferably melt-blending through a calender roll, a kneader, a Banbury mixer, an extruder, and the like. -blending). It is particularly preferred to manufacture with an extruder capable of carrying out continuous production.
압출 온도 범위는 바람직하게는 110-140℃이다. 압출 온도가 110℃ 미만이면, 광전지 접착 필름의 생산성이 저하될 수 있다. 압출 온도가 140℃를 초과하면, 광전지 용 복합 접착 필름을 얻기 위해 블렌드가 압출기에 의해 압출될 때 겔화가 발생할 수 있다.The extrusion temperature range is preferably 110-140°C. If the extrusion temperature is less than 110° C., the productivity of the photovoltaic adhesive film may be lowered. If the extrusion temperature exceeds 140° C., gelation may occur when the blend is extruded by an extruder to obtain a composite adhesive film for photovoltaic cells.
본 발명의 광전지를 위한 복합 접착 필름을 제조하는 예시적인 방법에서, 예를 들어 에틸렌-α-올레핀 공중합체 및 EVA 공중합체를 헨쉘 믹서(Henschel mixter) 또는 회전 드럼 믹서로 상술한 첨가제들과 혼합하고 압출기에 공급하여 시트형(sheet-like) 생성물을 형성 할 수 있다.In an exemplary method of preparing a composite adhesive film for a photovoltaic cell of the present invention, for example, an ethylene-α-olefin copolymer and an EVA copolymer are mixed with the additives described above with a Henschel mixer or a rotary drum mixer, and It can be fed to an extruder to form a sheet-like product.
본 발명의 광전지 용 접착 필름의 두께는 특별히 제한되지 않지만, 바람직하게는 30μm-3mm이다.The thickness of the adhesive film for photovoltaic cells of the present invention is not particularly limited, but is preferably 30 μm-3 mm.
실시 예 1(Example 1)Example 1
에틸렌-1-부텐 공중합체 75 중량부 (에틸렌 함량: 86mol%, MFR = 20g/10분, 밀도: 0.870g/cm3), EVA 25 중량부 (비닐 아세테이트 함량: 26 mass%, MFR = 4.4g/10분)), 2-에틸헥실 tert-부틸퍼옥시카보네이트 0.55 중량부, 카르보디이미드 화합물 0.2 중량부 (CARBODILITE V-05, Nisshinbo Chemical Inc.) 및 1.0 중량부의 비스(1,2,2,6,6-펜타메틸-4-피페리딘)세바케이트를 롤 밀에 공급하고 75℃에서 혼합하여 광전지 용 접착 필름 조성물을 제조하였다. 접착 필름 조성물을 75℃에서 캘린더 압착하고(calendered) 냉각시켜 접착 필름 두께가 0.7mm 인 광전지 용 접착 필름을 수득 하였다.75 parts by weight of ethylene-1-butene copolymer (ethylene content: 86 mol%, MFR = 20 g/10 min, density: 0.870 g/cm 3 ), 25 parts by weight of EVA (vinyl acetate content: 26 mass%, MFR = 4.4 g /10 min)), 2-ethylhexyl tert-butylperoxycarbonate 0.55 parts by weight, carbodiimide compound 0.2 parts by weight (CARBODILITE V-05, Nisshinbo Chemical Inc.) and 1.0 parts by weight bis(1,2,2, 6,6-pentamethyl-4-piperidine) sebacate was fed to a roll mill and mixed at 75° C. to prepare an adhesive film composition for photovoltaic cells. The adhesive film composition was calendered at 75° C. and cooled to obtain an adhesive film for photovoltaic cells having an adhesive film thickness of 0.7 mm.
실시 예 2(Example 2)Example 2
에틸렌-1-옥틸렌 공중합체 81 중량부 (에틸렌 함량: 89mol%, MFR = 48g/10분, 밀도: 0.884g/cm3), EVA 19 중량부 (비닐 아세테이트 함량: 26 mass%, MFR =4.4g/10분)), 2- 에틸헥실 tert-부틸퍼옥시카보네이트 0.4 중량부, 카르보디이미드 화합물 0.13 중량부 (CARBODILITE V-05, Nisshinbo Chemical Inc.) 및 1.7 중량부의 비스(1,2,2,6,6-펜타메틸-4-피페리딘)세바케이트를 롤 밀에 공급하고 75℃에서 혼합하여 광전지 용 접착 필름 조성물을 제조하였다. 접착 필름 조성물을 75℃에서 캘린더 압착하고 냉각시켜 접착 필름 두께 1.1mm의 광전지 용 접착 필름을 수득하였다.81 parts by weight of ethylene-1-octylene copolymer (ethylene content: 89 mol%, MFR = 48 g/10 min, density: 0.884 g/cm 3 ), 19 parts by weight of EVA (vinyl acetate content: 26 mass%, MFR = 4.4 g/10min)), 2-ethylhexyl tert-butylperoxycarbonate 0.4 parts by weight, carbodiimide compound 0.13 parts by weight (CARBODILITE V-05, Nisshinbo Chemical Inc.) and 1.7 parts by weight bis(1,2,2) ,6,6-pentamethyl-4-piperidine) sebacate was fed to a roll mill and mixed at 75° C. to prepare an adhesive film composition for a photovoltaic cell. The adhesive film composition was calendered at 75° C. and cooled to obtain an adhesive film for photovoltaic cells having an adhesive film thickness of 1.1 mm.
실시 예 3(Example 3)Example 3
에틸렌-1-옥틸렌 공중합체 84 중량부 (에틸렌 함량: 89 mol%, MFR = 48g/10분, 밀도: 0.884g/cm3), EVA 16 중량부 (비닐 아세테이트 함량: 26 mass%, MFR =4.4g/10분)), 2-에틸헥실 tert-부틸퍼옥시카보네이트 0.51 중량부, 카르보디이미드 화합물 0.25 중량부 (CARBODILITE V-05, Nisshinbo Chemical Inc.) 및 1.0 중량부의 비스(1,2,2,6,6-펜타메틸-4-피페리딘)세바케이트를 롤 밀에 공급하고 75℃에서 광전지 용 접착 필름 조성물을 제조한다. 접착 필름 조성물을 75℃에서 캘린더 압착하고 냉각시켜 접착 필름 두께 2.0mm의 광전지 용 접착 필름을 수득 하였다.84 parts by weight of ethylene-1-octylene copolymer (ethylene content: 89 mol%, MFR = 48 g/10 min, density: 0.884 g/cm 3 ), 16 parts by weight of EVA (vinyl acetate content: 26 mass%, MFR = 4.4 g/10 min)), 2-ethylhexyl tert-butylperoxycarbonate 0.51 parts by weight, carbodiimide compound 0.25 parts by weight (CARBODILITE V-05, Nisshinbo Chemical Inc.) and 1.0 parts by weight bis(1,2, 2,6,6-pentamethyl-4-piperidine) sebacate was fed to a roll mill and an adhesive film composition for photovoltaic cells was prepared at 75°C. The adhesive film composition was calendered at 75° C. and cooled to obtain an adhesive film for photovoltaic cells having an adhesive film thickness of 2.0 mm.
비교 예 1(Comparative example 1)Comparative example 1
EVA 공중합체 100 중량부를 기재(basic material)로 사용하고 에틸렌-1-부텐 공중합체를 사용하지 않은 것 이외에는 실시 예 1과 동일한 방식으로 광전지 용 접착 필름 조성물을 제조하였다. 얻어진 접착 필름 조성물을 75℃에서 캘린더 압착하고 냉각하여 2.6mm의 접착 필름 두께를 갖는 광전지 용 접착 필름을 수득 하였다.An adhesive film composition for a photovoltaic cell was prepared in the same manner as in Example 1, except that 100 parts by weight of the EVA copolymer was used as a basic material and the ethylene-1-butene copolymer was not used. The obtained adhesive film composition was calendered at 75° C. and cooled to obtain an adhesive film for photovoltaic cells having an adhesive film thickness of 2.6 mm.
비교 예 2(Comparative example 2)Comparative example 2
비스 (1,2,2,6,6-펜타메틸-4-피페리딘)세바케이트를 사용하지 않은 것을 제외하고는, 실시 예 1과 유사한 방식으로 광전지 용 접착 필름 조성물을 제조하였다. 얻어진 접착 필름 조성물을 75℃에서 캘린더 압착하고 냉각하여 접착 필름 두께가 1.5mm 인 광전지 용 접착 필름을 수득 하였다.A photovoltaic adhesive film composition was prepared in a similar manner to Example 1, except that bis (1,2,2,6,6-pentamethyl-4-piperidine) sebacate was not used. The obtained adhesive film composition was calendered and cooled at 75° C. to obtain an adhesive film for a photovoltaic cell having an adhesive film thickness of 1.5 mm.
비교 예 3(Comparative example 3)Comparative example 3
카르보디이미드 화합물을 사용하지 않은 것을 제외하고는, 실시 예 1과 유사한 방식으로 광전지 용 접착 필름 조성물을 제조하였다. 얻어진 접착 필름 조성물을 75℃에서 캘린더 압착하고 냉각하여 접착 필름 두께가 1.9mm 인 광전지 용 접착 필름을 수득 하였다.A photovoltaic adhesive film composition was prepared in a similar manner to Example 1, except that the carbodiimide compound was not used. The obtained adhesive film composition was calendered and cooled at 75° C. to obtain an adhesive film for a photovoltaic cell having an adhesive film thickness of 1.9 mm.
평가 방법Assessment Methods
1. 파손 시간(breakage time)1. Breakage time
얻어진 EVA 박막은 태양 노화 시험기 (흑판(blackboard) 온도: 63℃, 물분무(water mist) 없음)에 의해 열화 되었고, 파손 시간 (파손에 필요한 시간)은 120시간마다 1회 측정되었다.The obtained EVA thin film was deteriorated by a solar aging tester (blackboard temperature: 63°C, no water mist), and the breakage time (time required for breakage) was measured once every 120 hours.
2. PID 평가2. PID evaluation
상기 얻어진 광전지 용 접착 필름을 표면 측 접착 필름 및 후면 측 접착 필름으로서 사용하였고, 4개의 광전지 셀 유닛이 연결된 광전지 셀 마이크로 어셈블리를 제조하기 위해 광전지 셀용 유닛들을 표면 측 투명 보호 부재(유리판) 및 후면 보호 부재 (PET 필름) 사이에 개재하여 가열 및 가압이 수행되었다. PID 현상을 발생시키기 위한 모델 테스트를 위해, 제조된 각각의 광전지 마이크로 어셈블리를 수광 측을 하부로 하여 물 탱크에 침지시키고, 단락된 모듈의 출력 단자를 음극 (-) 전극에 연결시키고 양극 (+) 전극을 구리판에 연결하고 85℃의 온도 및 85%의 상대 습도에서 1500V의 전압을 24 시간 동안인가 하였다.The obtained photovoltaic adhesive film was used as a surface-side adhesive film and a rear-side adhesive film, and to prepare a photovoltaic cell micro-assembly to which four photovoltaic cell units are connected, the surface-side transparent protective member (glass plate) and the backside protection Heating and pressing were performed between the members (PET film). For the model test to generate the PID phenomenon, each manufactured photovoltaic micro-assembly was immersed in a water tank with the light receiving side down, and the output terminal of the shorted module was connected to the negative (-) electrode and positive (+) The electrode was connected to the copper plate and a voltage of 1500V was applied for 24 hours at a temperature of 85°C and a relative humidity of 85%.
상기 시험 전후에, 각각의 광전지 마이크로 어셈블리의 최대 출력 (Pmax)을 측정하고, 출력 유지율 ((시험 후 Pmax/시험 전 Pmax) x 100 (%))을 계산하였다. 95% 이상의 출력 유지율을 갖는 광전지 마이크로 어셈블리는 '◎'로 평가되었고, 90% 이상 및 95% 미만의 출력 유지율을 갖는 광전지 마이크로 어셈블리는 '○'로 평가되었고, 90% 미만 및 85% 이상의 광전지 출력 유지율을 갖는 광전지 마이크로 어셈블리는 '△'로 평가 되었다.Before and after the test, the maximum power (Pmax) of each photovoltaic micro-assembly was measured, and the power retention ((Pmax after test/Pmax before test) x 100 (%)) was calculated. Photovoltaic micro-assemblies with an output retention rate of 95% or more were evaluated as'◎', and photovoltaic micro-assemblies with an output retention rate of 90% or more and less than 95% were evaluated as'○', and photovoltaic cell outputs of less than 90% and 85% or more The photovoltaic micro-assembly with retention rate was evaluated as'△'.
3. 황변화(Yellowness)3. Yellowness
얻어진 광전지 용 접착 필름을 두 개의 유리 (두께 3.0 mm) 사이에 끼우고, 진공 라미네이터(vacuum laminator)를 사용하여 100℃에서 10분 동안 일시적으로 크림핑(crimping)하였으며, 오븐에 넣고 가교를 위해 150℃에서 30분간 가열하여 라미네이트(laminate)를 얻었다.The obtained adhesive film for photovoltaic cells was sandwiched between two glasses (thickness 3.0 mm), and temporarily crimped at 100° C. for 10 minutes using a vacuum laminator, placed in an oven, and 150 for crosslinking. It was heated at °C for 30 minutes to obtain a laminate.
라미네이트는 자외선으로 150시간 동안 조사된 후 황변화에 대해서 색차 계(color difference meter)를 사용하여 측정되었다. 자외선 조사는 온도 63℃의 환경에서 100mW/cm2의 강도로 295-400nm의 자외선을 조사한 s-UV 조사 시험기를 사용하여 수행하였다. 4.0 미만의 황변화는 '○' 로 평가되었고, 4.0 이상의 황변화는 'x' 로 평가되었다.The laminate was irradiated with ultraviolet rays for 150 hours, and then the yellow change was measured using a color difference meter. Ultraviolet irradiation was performed using an s-UV irradiation tester irradiated with ultraviolet rays of 295-400nm at an intensity of 100mW/cm 2 in an environment at a temperature of 63°C. A yellow change of less than 4.0 was evaluated as'○', and a yellow change of 4.0 or more was evaluated as'x'.
결과는 하기 표 1에 나타내었다:The results are shown in Table 1 below:
<표 1><Table 1>
표 1에서 알 수 있는 바와 같이, 본 발명의 광전지 용 접착 필름은 파손 시간, PID 성능 및 황변화 저항성 측면에서 더 우수한 효과를 달성 하였다.As can be seen from Table 1, the adhesive film for photovoltaic cells of the present invention achieved more excellent effects in terms of breakage time, PID performance, and resistance to yellowing.
Claims (6)
상기 에틸렌-α-올레핀 공중합체는, 상기 EVA와 에틸렌-α-올레핀 공중합체의 블렌드 100 중량부를 기준으로 50 내지 90 중량부의 양으로 함유되고,
상기 카르보디이미드 화합물은 하기 화학식으로 표시되는 구조를 가지며,
R5-N = C = N- (R6-N = C = N-)nR7, 여기서, R5는 이소프로필이고, R7은 3 차 부틸이고, R6은 에틸리덴이고, n은 500 미만의 양의 정수인,
광전지 용 복합 접착 필름.A composite adhesive film for photovoltaic cells comprising a blend of EVA and an ethylene-α-olefin copolymer, a crosslinking agent, a light stabilizer and a carbodiimide compound,
The ethylene-α-olefin copolymer is contained in an amount of 50 to 90 parts by weight based on 100 parts by weight of the blend of the EVA and the ethylene-α-olefin copolymer,
The carbodiimide compound has a structure represented by the following formula,
R 5 -N = C = N- (R 6 -N = C = N-) n R 7 , where R 5 is isopropyl, R 7 is tertiary butyl, R 6 is ethylidene, n is Which is a positive integer less than 500,
Composite adhesive film for photovoltaic cells.
상기 가교제는, 상기 EVA와 에틸렌-α-올레핀 공중합체의 블렌드 100 중량부를 기준으로 0.3 내지 1.5 중량부의 양으로 포함되는,
광전지 용 복합 접착 필름.The method of claim 1,
The crosslinking agent is included in an amount of 0.3 to 1.5 parts by weight based on 100 parts by weight of the blend of the EVA and ethylene-α-olefin copolymer,
Composite adhesive film for photovoltaic cells.
상기 광안정제는, 상기 EVA와 에틸렌-α-올레핀 공중합체의 블렌드 100 중량부를 기준으로 0.2 내지 2.0 중량부의 양으로 포함되는,
광전지 용 복합 점착 필름.The method of claim 1,
The light stabilizer is included in an amount of 0.2 to 2.0 parts by weight based on 100 parts by weight of the blend of the EVA and ethylene-α-olefin copolymer,
Composite adhesive film for photovoltaic cells.
상기 카르보디이미드 화합물은, 상기 EVA와 에틸렌-α-올레핀 공중합체의 블렌드 100 중량부를 기준으로 0.1 내지 0.25 중량부의 양으로 함유되는,
광전지 용 복합 접착 필름.The method of claim 1,
The carbodiimide compound is contained in an amount of 0.1 to 0.25 parts by weight based on 100 parts by weight of the blend of the EVA and ethylene-α-olefin copolymer,
Composite adhesive film for photovoltaic cells.
상기 가교제가 퍼옥시카보네이트 계 가교제 인,
광전지 용 복합 점착 필름.The method of claim 1,
The crosslinking agent is a peroxycarbonate-based crosslinking agent,
Composite adhesive film for photovoltaic cells.
A photovoltaic cell assembly obtained by sealing a photovoltaic cell device with the composite adhesive film for photovoltaic cells according to claim 1.
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