WO2007148754A1 - 太陽電池裏面封止用シート - Google Patents
太陽電池裏面封止用シート Download PDFInfo
- Publication number
- WO2007148754A1 WO2007148754A1 PCT/JP2007/062501 JP2007062501W WO2007148754A1 WO 2007148754 A1 WO2007148754 A1 WO 2007148754A1 JP 2007062501 W JP2007062501 W JP 2007062501W WO 2007148754 A1 WO2007148754 A1 WO 2007148754A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- polyol
- compound
- solar cell
- adhesive
- back surface
- Prior art date
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- 239000007790 solid phase Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000004544 sputter deposition 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
- 230000035882 stress Effects 0.000 description 1
- 125000001273 sulfonato group Chemical class [O-]S(*)(=O)=O 0.000 description 1
- 125000000542 sulfonic acid group Chemical group 0.000 description 1
- 125000000472 sulfonyl group Chemical group *S(*)(=O)=O 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 150000003504 terephthalic acids Chemical class 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 229960001295 tocopherol Drugs 0.000 description 1
- 229930003799 tocopherol Natural products 0.000 description 1
- 235000010384 tocopherol Nutrition 0.000 description 1
- 239000011732 tocopherol Substances 0.000 description 1
- 150000004992 toluidines Chemical class 0.000 description 1
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 description 1
- UFTFJSFQGQCHQW-UHFFFAOYSA-N triformin Chemical compound O=COCC(OC=O)COC=O UFTFJSFQGQCHQW-UHFFFAOYSA-N 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- GVJHHUAWPYXKBD-IEOSBIPESA-N α-tocopherol Chemical compound OC1=C(C)C(C)=C2O[C@@](CCC[C@H](C)CCC[C@H](C)CCCC(C)C)(C)CCC2=C1C GVJHHUAWPYXKBD-IEOSBIPESA-N 0.000 description 1
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
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
-
- 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
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
-
- 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
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/44—Polycarbonates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/62—Polymers of compounds having carbon-to-carbon double bonds
- C08G18/6216—Polymers of alpha-beta ethylenically unsaturated carboxylic acids or of derivatives thereof
- C08G18/622—Polymers of esters of alpha-beta ethylenically unsaturated carboxylic acids
- C08G18/6225—Polymers of esters of acrylic or methacrylic acid
- C08G18/6229—Polymers of hydroxy groups containing esters of acrylic or methacrylic acid with aliphatic polyalcohols
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/721—Two or more polyisocyanates not provided for in one single group C08G18/73 - C08G18/80
- C08G18/725—Combination of polyisocyanates of C08G18/78 with other polyisocyanates
-
- 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
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
-
- 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
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
- C09J175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
- H01L31/048—Encapsulation of modules
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
- H01L31/048—Encapsulation of modules
- H01L31/049—Protective back sheets
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31511—Of epoxy ether
- Y10T428/31515—As intermediate layer
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31551—Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
Definitions
- the present invention relates to a solar cell back surface sealing sheet having excellent hydrolysis resistance, and more specifically, laminated using an adhesive having excellent hydrolysis resistance, and the deterioration of the material accompanying hydrolysis.
- Solar cell backside sealing that can maintain excellent barrier properties and electrical output characteristics of the solar cell, as well as preventing the appearance defects associated with delamination Related to the sheet.
- Solar cells constitute the heart of a photovoltaic power generation system that converts sunlight energy directly into electricity, and are made of single-crystal, polycrystalline, or amorphous silicon semiconductor power. In terms of its structure, it is not necessary to use a single solar cell element (cell) as it is. Generally, several to several tens of solar cell elements are wired in series and in parallel for a long time (about 20 years). In order to protect the cell, various packaging is performed and unitized. The unit built in this package is called a solar cell module.
- the solar electronic module generally covers the surface exposed to sunlight with glass A3, and the solar cell element alone with a filler made of thermoplastic plastic A-2, especially ethylene vinyl acetate copolymer. Covers the gap of A-1 and protects the back side with the sealing sheet B It has been configured.
- the backside sealing sheet is required to have a weather resistance and a low water vapor transmission rate (excellent moisture barrier property). This is because if the filler is peeled off or discolored due to the permeation of moisture or the wiring is corroded, the output of the module itself may be affected.
- this solar cell backside sealing sheet has excellent weather resistance and flame retardancy, and good adhesiveness with an ethylene-acetic acid copolymer which is often used as a filler for solar cell modules.
- “Fluorocarbon resins” having the above are used (Patent Documents 1 and 2, etc.).
- a sheet for sealing the back surface of a solar cell using a polyester film such as polyethylene terephthalate having excellent electrical insulation has been developed.
- the composition contains a UV absorber that improves the weather resistance, which is cited as a disadvantage of using polyester film (Patent Document 3, etc.) and the amount of cyclic oligomer in the polyester (Patent Document 4). And 5), and the molecular weight of polyester is defined (Patent Document 6 etc.), there are many disclosures.
- polyester polyol itself has a low molecular weight due to hydrolysis and adheres in an accelerated test environment. The problem emerged when the strength decreased significantly.
- hydrolysis resistance is also required for adhesives that bond not only the weather resistance (hydrolysis resistance) as a film substrate, but it is still a solution at present. The current situation is not reached.
- Patent Document 1 JP-T 8-500214
- Patent Document 2 Special Table 2002-520820
- Patent Document 3 Japanese Patent Application Laid-Open No. 2001-111073
- Patent Document 4 Japanese Patent Laid-Open No. 2002-100788
- Patent Document 5 Japanese Unexamined Patent Application Publication No. 2002-134771
- Patent Document 6 JP 2002-26354 A
- the present invention has been made in consideration of the above-mentioned technical background, and is considered at the time of evaluating a solar cell module that is used only in an environment that is actually used as a solar cell module. Even in accelerated evaluation under high humidity, the weather resistance (hydrolysis resistance) that can maintain the electrical output characteristics of the solar cell just by preventing the deterioration of the material due to the hydrolysis and the appearance failure due to the delamination.
- An object of the present invention is to provide a sheet for sealing the back surface of a solar cell, which is excellent in properties.
- seat for solar cell backside sealing has a gas barrier layer
- the present invention provides a sheet for sealing a back surface of a solar cell comprising a laminate in which at least two layers of substrates are bonded together with a polyurethane-based adhesive.
- Adhesive is condition 1: HAST chain which is an accelerated evaluation device using pressurized steam 105 (Highly Accelerated Stress Test Systems).
- C 1. 05atm, laminate strength after 168 hours storage is at least IN / 15mm,
- Condition 2 Hydrolysis resistance that satisfies the following conditions: no storage floats due to delamination after storage at 105 ° C and 1.05 atm for 168 hours in a HAST chamber, which is an accelerated evaluation device using pressurized steam
- the polyurethane-based adhesive is a calposimide compound, an oxazoline compound, and an epoxy with respect to 100 parts by weight of the composition containing polyol A and a crosslinking agent.
- An adhesive composition comprising 1 to 50 parts by weight of at least one compound of the group of compound strength,
- the polyol A strength is preferably at least one of a polyester polyol and a polyester urethane polyol chain-extended with an isocyanate compound having two or more functional groups.
- the polyurethane adhesive is an adhesive composition containing a polyol B and a crosslinking agent
- Polyol B force It is preferably at least one of a polycarbonate polyol and a polycarbonate urethane polyol chain-extended with an isocyanate H compound having two or more functional groups.
- the polyurethane-based adhesive is a calposimide compound, an oxazoline compound, and an epoxy compound with respect to 100 parts by weight of the composition containing the polyol B and the crosslinking agent. It is preferable that the adhesive composition is formed by adding 1 to 50 parts by weight of at least one compound of the group consisting of:
- the polyurethane adhesive is an adhesive composition containing polyol C and a crosslinking agent
- the above-mentioned polyol C force S and an acrylic polyol having a hydroxyl group introduced in the side chain are preferred.
- the polyurethane-based adhesive is a calpositimide compound with respect to 100 parts by weight of the composition containing the polyol C and the crosslinking agent.
- An adhesive composition comprising 1 to 50 parts by weight of at least one compound selected from the group consisting of an oxazoline compound and an epoxy compound is preferred.
- the polyurethane adhesive is an adhesive composition containing polyol D and a crosslinking agent.
- the polyol D preferably contains the polyol A:! To 50% by weight and at least one of the polyol B and the polyol C 50 to 99% by weight.
- the polyurethane-based adhesive is a calpositimide compound, an oxazoline compound, and an epoxy with respect to 100 parts by weight of the composition containing polyol D and a crosslinking agent.
- An adhesive composition comprising 1 to 50 parts by weight of at least one compound of the group of compound strength,
- the polyol D preferably contains the polyol A:! To 50% by weight and at least one of the polyol B and the polyol C 50 to 99% by weight.
- the polyurethane-based adhesive contains a polyol E and a crosslinking agent
- the above-mentioned polyol E force 1-50% by weight of the above polyol A, 50-99% by weight of at least one of the above polyol B and the above polyol C, and a co-stretched chain with an isocyanate H compound having two or more functional groups A polymerization type polyol is preferable.
- the polyurethane-based adhesive is a calposimide compound, an oxazoline compound, and an epoxy with respect to 100 parts by weight of a composition containing polyol E and a crosslinking agent. It is an adhesive composition formed by adding 1 to 50 parts by weight of at least one compound of gnoleop composed of a compound,
- the polyol E is chained by an isocyanate compound in which 1 to 50% by weight of the polyol A and 50 to 99% by weight of at least one of the polyol B and the polyol C have two or more functional groups. It is preferable that the copolymerized polyol is elongated.
- the polyurethane-based adhesive is a calposimide compound, an oxazoline compound, and an epoxy with respect to 100 parts by weight of the composition containing polyol F and a crosslinking agent.
- An adhesive composition comprising 1 to 50 parts by weight of at least one compound of the group of compound strength,
- the polyol F force is preferably at least one of a polyether polyol and a polyether urethane polyol chain-extended with an isocyanate H compound having two or more functional groups.
- the cross-linking agent is 2,4_tolylene diisocyanate, 2,6_tolylene diisocyanate, xylylene diisocyanate, 4,4'-diphenylmethane diisocyanate, methylene diisocyanate.
- the base material is a polyester base material selected from polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polybutylene terephthalate (PBT), and polycyclohexanedimethanol-terephthalate (PCT); Materials: Polyvinyl fluoride (PVF), Polyvinylidene fluoride (PVDF), Polychlorotrifluoroethylene (PCTFE), Polyethylenetetrafluoroethylene (ETFE), Polytetrafluoroethylene (PTFE), Tetrafluoro A group consisting of a polyethylene perfluoroalkyl vinyl ether copolymer (PFA) and a tetrafluoroethylene monohexafluoropropylene copolymer (FEP) force selected a fluorine-based substrate; and an acrylic substrate It is preferable that the substrate is selected from the following.
- PFA polyethylene perfluoroalkyl vinyl ether copolymer
- FEP tetrafluoroethylene monohe
- the base material has a number average molecular weight of 18,000-40,000, a cyclic oligomer content of 1.5% by weight or less, an intrinsic viscosity of 0.5 dlZg or more, and A polyester base material having hydrolysis resistance is preferred.
- the laminate further includes an aluminum foil base material, an aluminum vapor deposition base material, a silica vapor deposition base material, or an alumina vapor deposition base material.
- the present invention provides a solar cell module using the solar cell back surface sealing sheet. By providing this, the above object is achieved.
- the solar cell back surface sealing sheet of the present invention comprises a laminate that is laminated using an adhesive that is particularly excellent in hydrolysis resistance. For this reason, not only in the environment where solar cell modules are actually used, but also in high-temperature and high-humidity environments, and in the evaluation environment for solar cell modules, it is also effective in material deterioration and delamination due to hydrolysis. It is possible to maintain excellent NORA characteristics and solar cell electric output characteristics as a sheet for backside sealing that only prevents the appearance defects involved.
- the solar cell module of the present invention can maintain excellent electric output characteristics.
- FIG. 1 is a schematic diagram showing an example of a solar cell module.
- FIG. 2 is a schematic cross-sectional view showing an example of the solar cell back surface sealing sheet of the present invention.
- FIG. 3 is another example of the solar cell backside sealing sheet of the present invention, and is a schematic cross-sectional view with a barrier layer interposed.
- FIG. 4 is a schematic explanatory view showing an example of a manufacturing process of a solar cell module.
- the polyurethane adhesive used when bonding two or more base materials constituting the solar cell backside sealing sheet has excellent hydrolysis resistance. It is in the form of an agent or an adhesive composition.
- Excellent hydrolysis resistance refers to the effect of hydrolysis of the adhesive as an index. Accelerated evaluation under pressurized steam (105 ° C, 1.05 atm, 168 hours storage) (IEC— 60 068— 2— 66 JIS 60068— 2— 66)) This is a laminar strength of 1 N / I 5 mm or more, and there is no floating between substrates due to delamination. . In other words, excellent hydrolysis resistance is based on the influence of hydrolysis of the adhesive as an index, and is described in the accelerated evaluation by the HAST chamber (accelerated evaluation by pressurized steam), for example, in IEC 60068-2-66. In the way of 105. C, 1. 05 atm, laminating strength after storage for 168 hours is 1N / I 5mm or more, and the laminating power without lifting between substrates due to delamination.
- the polyurethane adhesive used for the solar cell backside sealing sheet of the present invention is composed of a carpositimide compound, an oxazoline compound, and an epoxy compound with respect to 100 parts by weight of the composition containing Polyol A and a crosslinking agent.
- an adhesive composition containing 1 to 50 parts by weight of at least one compound of the group can be mentioned.
- polyol A is at least one of polyester urethane polyol and chain extension of isocyanate polyol compound having two or more functional groups.
- the polyol A contained in the adhesive composition is excellent in the initial laminate strength between the substrates, and further has heat resistance enough to withstand an accelerated test in a high-temperature environment.
- polyol A has a urethane bond having excellent hydrolysis resistance. However, it also has an ester bond having hydrolyzability.
- the ester bond site that has undergone hydrolysis in an accelerated environment under high temperature and high humidity has the ability to cleave into a carboxyl group and a hydroxyl group. This carboxyl group acts as an acid catalyst and further hydrolyzes other ester bond sites. Promote.
- a composition in which at least one compound of a group consisting of a carpositimide compound, an oxazoline compound, and an epoxy compound is added to polyol A with a crosslinking agent. 1 to 50 parts by weight per 100 parts by weight of the product.
- the polyester polyol used in the present invention includes aliphatic carboxylic acids such as succinic acid, gnoretaric acid, adipic acid, pimelic acid, spellic acid, azelaic acid, sebacic acid, and brassic acid; isophthalic acid, terephthalic acid Acids and aromatic dicarboxylic acids such as naphthalenedicarboxylic acid; ethylene glycol, propylene glycol, butanediol, neopentyl glycol, methylpentanediol, hexanediol, heptanediol, octanediol, nonanediol, decanediol, and dodecane Can be obtained by using one or more of aliphatic diols such as diols; cyclohexane diols and alicyclic diols such as hydrogenated xylylene diols;
- Polyester urethane polyols that are chain-extended with an isocyanate compound having two or more functional groups are hydroxyl groups at both ends of the polyester polyol, such as 2,4-tolylene diisocyanate, 2 , 6-tolylene diisocyanate, xylylene diisocyanate, 4,4'-diphenylmethane diisocyanate, methylene diisocyanate, isopropylene diisocyanate, lysine diisocyanate, 2, 2 , 4-trimethylhexamethylene diisocyanate, 2, 4, 4_trimethylhexamethylene diisocyanate, 1,6_hexamethylene diisocyanate, methylcyclohexane diisocyanate, isophorone diisocyanate 4, 4'—Diisocyanate, etc.
- an isocyanate compound having two or more functional groups are hydroxyl groups at both ends of the polyester polyol, such as 2,4-tolylene diisocyanate, 2
- Both Adakuto body consisting of the iso Xia sulfonates I arsenide compound selected from one or more, biuret body, or the like polyester Le urethane polyol chain extension with Isoshianureto products thereof.
- the cross-linking agent for cross-linking these polyols A the above-mentioned isocyanate compound can be used with a force S, but is not limited to these, and has a reactive hydrogen group and reactivity. If so, the type is not questioned.
- Monooxazoline compounds such as 2oxazoline, 2 phenol-2-oxazoline, 2,5 dimethyl-2-oxazoline, 2,4 diphenyl-2-oxazoline, 2, 2 '— (1,
- epoxy compounds include 1,6 hexanediol, neopentyl darconol, and diglycidyl ethers of aliphatic diols such as polyalkylene glycol; recbitonore, sonorebitan, polyglycerone, pentaerythritole Polyglycidyl ethers of aliphatic polyols such as diglycerone, glycerol, and trimethylolpropane; polyglycidyl ethers of alicyclic polyols such as cyclohexanedimethanol; terephthalic acid, isophthalic acid, naphthalenedicarboxylic acid, triglyceride Diglycidyl esters or polyglycidyl esters of aliphatic or aromatic polycarboxylic acids such as meritic acid, adipic acid, and sebacic acid; resorcinol, bis (p-hydroxyphenyl) methane,
- the compound capable of blocking the carboxyl group is blended in an amount of 1 to 50 parts by weight with respect to 100 parts by weight of the composition in which a polyol is blended with a crosslinking agent. If it is less than 1 part by weight, the hydrolysis resistance is poor. A larger amount is preferable from the viewpoint of blocking the carboxyl group produced by hydrolysis, but the polyurethane component that apparently contributes to adhesion is reduced, and the adhesion function may be lowered. In consideration of the coating handleability of the polyurethane adhesive, it is preferably 50 parts by weight or less.
- a compound that forms a crosslinking reaction starting from a hydroxyl group generated by hydrolysis may be added.
- Examples of such compounds include phosphorus compounds, such as tris (2,4 di-t-butylphenol) phosphite, tetrakis (2,4-di-tert-butylphenol), 4,4'-biphenylen phosphonite, bis (2,4 di-t-butylphenol) pentaerythritol-diphosphite, bis (2,6-di-tert-butyl-4-methylphenyl) pentaerythritol di-phosphite, 2,2-methylenebis (4,6 di-t-butylphenol) Ninore) octyl phosphite, 4,4'-butylidene-bis (3-methyl-6-t butylphenol tridecyl) phosphite, 1,1,3-tris (2-methyl-4-ditridecyl phosphite-1 5-t —Butyl monophenyl) butane, tris (mixed mono and di non
- the hydroxyl group generated by the hydrolysis is used as an acid catalyst for hydrolysis rather than further crosslinking with a phosphorus compound. Since it is essential to block the acting carboxyl group, A positive imide compound, an oxazoline compound, and an epoxy compound are preferable. Among them, the most preferred compound is a carpositimide compound.
- the polyol component as a polyol component considered as a polyurethane-based material is considered as a polyurethane-based material
- polyol B means at least one of polycarbonate urethane and a polycarbonate urethane polyol chain-extended with an isocyanate compound having two or more functional groups.
- Polyol C means an acrylic polyol having a hydroxyl group introduced in the side chain.
- Polyol F means at least one of polyether polyol and polyether urethane polyol that has been chain-extended with isocyanate H compound having two or more functional groups.
- polyol B and polyol C are preferred in view of heat resistance.
- the polycarbonate polyol that can be used as the polyol B can be obtained, for example, by reacting a carbonate compound with a diol.
- carbonate compound dimethyl carbonate, diphenyl carbonate, ethylene carbonate and the like can be used.
- Diols include aliphatic diols such as ethylene glycol, propylene glycol, butanediol, neopentyl diol, methylpentanediol, hexanediol, heptanediol, octanediol, nonanediol, decanediol, and dodecanediol; cyclohexanediol And alicyclic diols such as hydrogenated xylylene glycol; aromatic diols such as xylylene glycol and the like. These can be used alone or as compounds. [0042] Further, polycarbonate urethane polyol obtained by reacting these carbonate compound and diol compound is subjected to chain extension with an isocyanate compound having two or more functional groups, Yes, it can be used as polyol B.
- polycarbonate urethane polyol obtained by reacting these carbonate compound
- aliphatic polycarbonate polyol is preferable in consideration of performance as an adhesive.
- the acrylic polyol having a hydroxyl group introduced into the side chain used as polyol C is composed of a hydroxyl group-containing monomer such as 2-hydroxyxetyl (meth) acrylate and 2-hydroxypropyl (meth) acrylate and (meth) acrylic.
- Acid and Z or alkyl (meth) acrylate monomers alkyl groups include methinole group, ethyl group, n-propyl group, i-propyl group, n_butyl group, i_butyl group, t_butyl group, 2_ Ethylhexyl group and cyclohexyl group) may be used.
- (meth) acrylamide, N-alkyl (meth) acrylamide, N, N dialkyl (meth) acrylamide (alkyl groups include methyl, ethyl, n-propyl, i-open pill, and n-butyl.
- N-alkoxy (meth) acrylamide N, N dialkoxy (meth) acrylamide, (the alkoxy group is methoxy Group, ethoxy group, butoxy group, isobutoxy group, etc.), N methylol (meth) acrylamide, N phenyl (meth) acrylamide and other glycidinole group-containing monomers such as amylidene group-containing monomers can also be used.
- a polymer obtained by copolymerizing monomers such as fumaric acid monoester, itaconic acid, alkylitaconic acid monoester, (meth) acrylonitrile, vinylidene chloride, ethylene, propylene, butyl chloride, butyl acetate and butadiene can also be used.
- polyols ⁇ and C can also be used as a blend with polyol ⁇ .
- a composition containing polyol A and polyol B, polyol A and polyol It may be a composition containing Reol C, or a composition containing polyol A, polyol B and polyol C.
- the polyurethane adhesive used in the present invention may be polyol D.
- the proportion of polyol B and / or C having a hydrolysis-resistant skeleton in polyol D is 50 to 99% by weight, and the proportion of polyol A having a hydrolyzable skeleton is 1 to 50% by weight.
- polyurethane-based adhesive at least one of polyols B and C and polyol A are co-stretched using the above-described bifunctional or higher isocyanate compound.
- Polymers can be used.
- the polyurethane adhesive used in the present invention may be polyol E.
- main chain block copolymer of polyol B_polyol A and the side chain block copolymer of polyol C-polyol A can be exemplified.
- the ratio of polyol B and / or C having a hydrolysis-resistant skeleton in polyol E is 50 to 99% by weight, and the ratio of polyol A having a hydrolyzable skeleton is 1 to 50% by weight.
- the polyurethane adhesive used in the present invention is a copolymer obtained by combining polyol A having hydrolysis properties and polyol B and / or polyol C having a hydrolysis-resistant skeleton. Or a mixture containing them.
- These polyols B to E can be obtained by combining at least one compound of the above-described carposimide compound, oxazoline compound, and epoxy compound, preferably a carpositimide compound.
- the blending ratio may be about 1 to 50 parts by weight with respect to 100 parts by weight of the composition obtained by blending polyols B to E with a crosslinking agent.
- Preferred substrates include polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polybutylene terephthalate (PBT), and Polycyclohexanedimethanol monoterephthalate (PCT) force Polyester material selected; Polycarbonate base material; Polyvinyl fluoride (PVF), Polyvinylidene fluoride (PVDF), Polychlorinated trifluoroethylene (PCTFE), Polyethylene tetrafluoro Polyethylene (ET FE), Polytetrafluoroethylene (PTFE), Tetrafluoroethylene perfluoroalkyl butyl ether copolymer (PFA), and Tetrafluoroethylene-hexafluoropropylene copolymer ( Examples thereof include a fluorine-based substrate selected from FEP); or an acrylic substrate.
- FEP polyethylene terephthalate
- PEN polyethylene naphthalate
- PBT polybutylene terephthalate
- PCT Polycyclohexaned
- the present invention is not limited to these, and it is possible to appropriately select a polyolefin resin, a polyamide resin, a polyarylate resin, and the like in consideration of heat resistance, strength physical properties, electrical insulation, and the like.
- the polyester base is a base obtained using a polybasic acid or an ester-forming derivative thereof and a polyol or an ester-forming derivative thereof.
- polybasic acid component examples include terephthalic acid, isophthalic acid, phthalic acid, phthalic anhydride, 2,6 naphthalenedicarboxylic acid, 1,4-cyclohexanedicarboxylic acid, adipic acid, sebacic acid, trimellitic acid, pyromellitic acid , Dimer acid, maleic acid, and itaconic acid. Two or more of these are used.
- polyol component examples include ethylene glycol, 1,4 butanediol, ethylene glycol, dipropylene glycol, 1,6-hexanediol, 1,4-cyclohexanediethanolol, trimethylolpropane, pentaerythritol, and xylene.
- polyester As the polyester constituting the base material, the above-mentioned polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polybutylene terephthalate (PBT), and polycyclohexane dimethanol monoterephthalate (PCT) are generally used.
- PET polyethylene terephthalate
- PEN polyethylene naphthalate
- PBT polybutylene terephthalate
- PCT polycyclohexane dimethanol monoterephthalate
- a polyester substrate particularly a substrate containing polyethylene terephthalate
- a polyester base material such as polyethylene terephthalate
- the number average molecular weight is in the range of 18,000 to 40,000
- the cyclic oligomer content is 1.5% by weight or less
- the intrinsic viscosity is A polyester substrate having hydrolysis resistance of 0.5 dl / g or more is preferred.
- the polyester has a carboxylic acid group at the molecular end, it easily reacts with heat, water, and acid, so it is susceptible to hydrolysis. Therefore, it is preferable to obtain a substrate-required polyester by using a solid phase polymerization method capable of increasing the number average molecular weight without increasing the amount of terminal carboxylic acid.
- the terminal carboxylic acid group can be sealed with a carpositimide compound, an epoxy compound, or an oxazoline compound.
- a polyester having a heat shrinkage rate of 1% or less, preferably 0.5% or less, by annealing treatment is also preferable to use a base material.
- UV absorbers such as benzophenone, benzotriazole, and triazine, hindered phenols, phosphorus, io, and tocopherol antioxidants, hindered amine light stabilizers It is also possible to mix them as appropriate.
- the polyester base material used for the solar cell back surface sealing sheet may be transparent, but it is preferable to use a white polyester film from the viewpoint of improving the power generation efficiency of the solar cell element.
- a white polyester film it is preferable to use a white polyester film as a base material to be bonded to the filler.
- the white polyester film used here is a “pigment dispersion type” in which white additives such as titanium oxide, silica, alumina, calcium carbonate and barium sulfate are added, or polymers and fine particles which are incompatible with polyester.
- white additives such as titanium oxide, silica, alumina, calcium carbonate and barium sulfate are added, or polymers and fine particles which are incompatible with polyester.
- a “fine foaming type” that whitens by forming voids at the blend interface during biaxial stretching.
- polymers that are incompatible with polyester are preferred.
- polyolefin resins such as polyethylene, polypropylene, polybutene, and polymethylpentene are preferred.
- polyalkylene glycol or a copolymer thereof can be used as a compatibilizing agent.
- fine particles include organic particles and inorganic particles, and silicon particles, polyimide particles, cross-linked styrene-dibutylbenzene copolymer particles, cross-linked polyester particles, fluorine-based particles, and the like are used.
- inorganic particles calcium carbonate, silicon dioxide, barium sulfate or the like is used.
- Fig. 2 shows a structure in which the above base material is bonded with a polyurethane adhesive using polyols A to E.
- Figure 2 shows a simple structure, in which two base materials B_l are bonded with polyurethane adhesive B-2.
- Examples of such a gas layer rear layer B-3 include a metal foil base material, a metal vapor deposition film base material aluminum foil base material, or an inorganic compound vapor deposition film base material.
- metal foil is aluminum foil.
- Typical examples of the metal vapor-deposited film include a polyester-based stretched film and an aluminum-deposited film obtained by depositing aluminum on a polyolefin-based stretched film.
- Examples of the inorganic compound vapor-deposited film base material include a film base material obtained by vapor-depositing aluminum oxide, silicon oxide, tin oxide, magnesium oxide, indium oxide, or a composite oxide thereof on a polyester base material. If the substrate is transparent and has a gas barrier property such as oxygen and water vapor, it can be used as the gas barrier layer B-3. S, especially a film substrate obtained by depositing aluminum oxide on a polyester substrate or silicon oxide on a polyester substrate. Vapor deposited film substrate is preferred.
- the optimum condition of the thickness varies depending on the kind of the inorganic oxide to be used, but the desired value is generally selected within the range of 5 to 300 nm.
- the film thickness is less than 5 nm, and a uniform film cannot be obtained, and the film thickness is not sufficient to develop the NORA function. If the film thickness is greater than 300 nm, the film may be subjected to flexibility and cracks may occur due to external stress. Preferably, the range is from 10 to 150 nm.
- a method of providing these vapor deposition layers there is a force that can be formed by a normal vacuum vapor deposition method, and other thin film formation methods such as sputtering, ion plating, and plasma vapor deposition (CVD). Etc. can also be used.
- an overcoat containing a part of ethylene monoacetate butyl copolymer or a completely saponified product and a silane compound is formed on the vapor deposition layer of the inorganic compound.
- a coat layer may be provided.
- the base material forming the gas barrier layer B-3 are taken into consideration.
- an inorganic compound vapor deposited film base material is preferable.
- the gas noble layer B_3 when used for a solar cell backside sealing sheet, the gas noble layer B_3 must also have excellent hydrolysis resistance.
- the gas barrier layer B_3 is particularly preferably an inorganic compound vapor-deposited film using a polyester base material. Among them, an inorganic compound vapor-deposited film using a polyethylene terephthalate film having a thickness of about 10 to 150 ⁇ m as a base material is preferred.
- a polyethylene terephthalate film having a thickness in the above range is manufactured by forming a film of a polyester resin melted by a T-die casting method, and simultaneously heat-fixing it in-line simultaneously or sequentially. At this time, in order to improve workability, it is preferable to use a polyester resin having an intrinsic viscosity in the range of 0.2 to 0.5 dl / g.
- polyester is used as the base material of the inorganic compound vapor-deposited film forming the gas rear layer B-3.
- the gas barrier layer B-3 may be hydrolyzed.
- a urethane adhesive that does not contain a hydrolyzable main agent (polyol A) and contains a polyol that is excellent in hydrolysis resistance, such as polyols B and C, also contains a carpositimide compound that suppresses hydrolysis. Added.
- the added carpositimide compound or the like suppresses hydrolysis of the gas barrier layer B_3 rather than suppressing hydrolysis of the adhesive.
- moisture passes through the polyurethane adhesive containing polyols B and Z or C.
- the gas reaches the rear layer B-3 and usually causes hydrolysis in the gas barrier layer B-3.
- the hydrolysis in the gas barrier layer B-3 can be suppressed because the calpositimide compound or the like is added to the adhesive layer.
- the hydrolyzable main agent is The water that hydrolyzes the base material of the gas barrier layer B_3 is hydrolyzed and consumed.
- the adhesive layer can maintain its adhesive function. That is, the function of the gas noble layer B_3 can be maintained while maintaining the function as the adhesive B_2.
- the added carpositimide compound or the like suppresses hydrolysis of the ester group in the polyol A and hydrolysis of a further ester bond. Therefore, the function as the adhesive B-2 can be maintained at a higher level while maintaining the function of the gas barrier layer B-3.
- Apply the above polyurethane adhesive in the range of ⁇ 10g / m 2 and dry laminate It is possible to use a known method such as lamination. Further, not limited to the above dry process, for example, an easy adhesion coating layer made of polyester, polyurethane, acrylic, or a mixture thereof may be provided on the substrate side.
- the substrate side is preferably subjected to a surface treatment for improving adhesion, such as corona treatment, flame treatment, or plasma treatment, if necessary.
- a surface treatment for improving adhesion such as corona treatment, flame treatment, or plasma treatment, if necessary.
- plasma treatment or the like is preferable.
- a laminate obtained as described above is used as a solar cell back surface sealing sheet, and a solar cell module is manufactured. This process is the following (1) to (4) and will be described with reference to FIG.
- filler A-2 is melted by the heat / pressure to embed cell A-1. Further, the glass plate 8-3, the cell 8-1, and the back surface sealing sheet B are bonded together, and the filler A-2 is cross-linked and solidified.
- the step (4) is classified into a case where a cross-linking reaction is performed in an oven provided in a separate line after lamination and a case where a cross-linking reaction is performed inside the laminator.
- the former is a standard cure type, and the latter is a fast cure type.
- an ethylene vinyl acetate copolymer having a butyl acetate content of 10 to 40% by weight is preferably used as the filler for the solar cell module.
- the ethylene-vinyl acetate copolymer is crosslinked by heat or light.
- thermal crosslinking an organic peroxide that decomposes at a temperature of 70 ° C or higher to generate radicals is used.
- a crosslinking agent having a half-life of about 10 hours and a decomposition temperature of 50 ° C or higher is used.
- a photosensitizer When performing photocuring, a photosensitizer is used.
- the hydrogen abstraction type (bimolecular reaction type) photosensitizer benzophenone, methyl orthobenzoylbenzoate, 4_benzoyl-4'-methyldiphenylsulfide, isopropyl thixanthone and the like are preferably used.
- benzoin ether pendinole dimethyl ketal and the like can be used.
- 2-hydroxy _ 2 -methinole 1 _phenyl propane 1 1 _one 2-hydroxycyclohexyl phenyl ketone, alkyl phenyl daloxylate, jetoxy Setofone can be preferably used.
- ⁇ -aminoalkylphenone type includes 2-methyl 1- [4 (methylthio) phenyl] —2-morpholinopropane-1, 2-benzyl-1-2-dimethylamino-1- (4-morpholino). Phenol) 1 butanone 1 or the like can be preferably used.
- acyl phosphine oxide is also used.
- the urethane-based adhesive preferably contains a silane coupling agent.
- Silane coupling agents include bitriethoxysilane, vinyltrismethoxymethoxy) silane, ⁇ -methacryloxypropyltrimethoxysilane, butyltrioxysilasilane, ⁇ _ (3,4-epoxycyclohexyl) ethyltrimethoxy Examples include silane, ⁇ -chloropropyl methoxysilane, butyltrichlorosilane, ⁇ -mercaptopropyltrimethoxysilane, ⁇ -aminopropyltriethoxysilane, and __ ⁇ (aminoethyl) - ⁇ -aminopropyltrimethoxysilane it can.
- a veg epoxy group-containing compound that promotes adhesion and curing.
- the epoxy group-containing compound that is preferably used include triglycidinoretris (2-hydrochetchinole) isocyanurate, neopentyl glycol diglycidyl ether, 1, 6 1-hexanediol diglycidyl ether, acrylic glycidyl ether, 2-ethynole hexyl glycidyl ether, phenyl daricidyl ether, phenol glycidyl etherenole, p-t petit / refeninoreglycidino reetenole, adipic acid diglycidino leste Compounds such as Nole, o-phthalic acid diglycidyl ester, glycidyl metatalylate, and butyl daricidyl ether, and oligomers containing an epoxy
- an talyloxy group, methacryloxy group or allyl group-containing compound may be added.
- talyloxy group, methacryloxy group or allyl group-containing compound may be added.
- Most preferred are (meth) acrylic acid derivatives such as their alkyl esters and amides.
- alkyl group in addition to alkyl groups such as methinole, ethyl, dodecyl, stearyl, lauryl, cyclohexyl group, tetrahydrofurfuryl group, aminoethyl group, 2-hydroxyethyl group, 3- Examples thereof include a hydroxypropyl group and a 3_chloro 2-hydroxypropyl group.
- esters of (meth) acrylic acid with multifunctional alcohols such as ethylene glycol, triethylene glycol, polyethylene glycolol, glycerin, trimethylolpropane, or pentaerythritol are also used.
- a typical amide is acrylamide.
- the aryl group-containing compound is preferably triaryl cyanurate, triallyl isocyanurate, diaryl phthalate, diaryl isophthalate, or diaryl maleate.
- the ethylene vinyl acetate copolymer constituting the solar cell module is a resin composition in which various additives that satisfy the functions required for the solar cell module are blended.
- the adhesion between the filler containing the ethylene-vinyl acetate copolymer composition obtained by blending such various additives and the solar cell back surface sealing sheet is improved.
- the surface of the base material B-1 to be bonded with the filler is acrylic, epoxy, phenolic, polyester, urethane, styrenic resin or a modification thereof. It is also preferable to provide an easy-adhesion coat layer made of a natural material.
- the obtained solar cell module can maintain excellent electrical output characteristics over a long period of time.
- the following base materials 1 and 2 were used as the base material of the solar cell back surface sealing sheet.
- the following base material 3 was used as a base material for the gas barrier layer.
- a “fine foam type” white polyethylene terephthalate film with a thickness of 188 / im was used.
- Polyethylene terephthalate This is the oligomer content of 0.5 wt 0/0, the number average molecular weight of 19, a 500, an inherent viscosity of 0. 7 dl / g.
- This substrate is a two-layer, three-layer multilayer film with a fine foam layer in the intermediate layer. The thickness of the intermediate layer accounts for 80%.
- This white polyethylene terephthalate film was not subjected to any treatment on the bonded surface in contact with the adhesive.
- PVDF polyvinylidene fluoride
- This material is an alloy composed of PVDF and acrylic resin.
- a normal biaxially stretched polyethylene terephthalate film with a thickness of 12 / im was provided with an alumina deposition layer with a thickness of 20 nm by the PVD method. Further, a hydrolyzate of alkoxysilane was subjected to a sol-gel reaction with a complete saponified product of ethylene-vinyl acetate copolymer to a thickness of 0.5 / im. The coating layer was provided. This base material was used as a gas base substrate.
- the following adhesives 1 to 8 were used as adhesives for attaching the substrate.
- a hardener consisting of a mixture of xylylene diisocyanate (adduct) and hexamethylene diisocyanate (burette) was blended with the main component consisting of polyester polyol so that the solid content ratio was 3: 1.
- a polyurethane-based adhesive Adhesive 1 was obtained.
- a polyurethane-based adhesive (Adhesive 2) was obtained by blending 10 parts by weight of N, N′-diphenylcarboximide with 100 parts by weight of Adhesive 1.
- Polyurethane based by mixing an aliphatic resin based on polycarbonate with chain extension with isophorone diisocyanate (monomer) and a curing agent composed of isophorone diisocyanate (trimer) in a solid content ratio of 3: 1.
- An adhesive (adhesive 3) was obtained.
- a polyurethane-based adhesive (adhesive 4) was obtained by blending 30 parts by weight of N, '-diphenyl carpositimide with 100 parts by weight of adhesive 3.
- the main component of acrylic polyol which is copolymerized with hydroxyethyl methacrylate, is mixed with a curing agent consisting of hexamethylene diisocyanate (burette) so that the solid content ratio is 3: 1.
- a polyurethane-based adhesive Adhesive 5
- polyurethane adhesive by adding 30 parts by weight of ⁇ , N'-divinylcarbodiimide to 100 parts by weight of polyurethane adhesive with a solid content ratio of 3: 1. 6) was obtained.
- a curing agent consisting of xylylene diisocyanate is added to the main component consisting of polyether polyol.
- Polyurethane adhesive (adhesive 7) is obtained by blending 30 parts by weight of ⁇ , ⁇ '-diphenyl carpositimide with 100 parts by weight of polyurethane adhesive blended to a solid content ratio of 4: 1. It was.
- An aliphatic polycarbonate main agent and a main component comprising a polyester polyol were blended so as to be 70-30, and then an isophorone diisocyanate (monomer) was added to perform chain extension to obtain a copolymer type main agent.
- the polyurethane adhesive (Adhesive 8) was obtained by blending 30 parts by weight of ⁇ , ⁇ '-diphenyl carpositimide with 100 parts by weight of this polyurethane adhesive.
- Substrates 1 to 3 were laminated by the dry laminating method using the adhesives 1 to 8 described above.
- the amount of adhesive applied was adjusted to 5 g / m 2 on a dry basis. Aging temperature is 50 ° C-5 days.
- the actual prototype configurations are the following configurations 1-4.
- Composition 1 Base 1 / Adhesive / Base 1
- Composition 2 Substrate 2 / Adhesive / Substrate 2
- composition 3 Substrate 1 / Adhesive / Substrate 3 / (Adhesive) / Substrate 1
- Composition 4 Substrate 2 / Adhesive / Substrate 3 / (Adhesive) / Substrate 2
- the (adhesive) in configurations 3 and 4 is in contact with the vapor deposition layer of the substrate 3.
- the obtained solar cell back surface sealing sheet was evaluated by an accelerated evaluation test using pressurized steam.
- a sample of the above configuration was cut to A4 size and set in a HAST chamber (accelerated evaluation device using pressurized steam), and the laminate strength and peeling behavior over time were evaluated at 105 ° C and 1.05 atm.
- the laminate strength was measured using a T-type peeling method with Tensilon, and the strength was measured at a 15 mm wide crosshead speed of 300 mm / min.
- Solar cell backside sealing sheet is usually required to be stored for more than 2, OOOh in 85 ° C_85% RH environment for accelerated evaluation. Required force Using this evaluation method, it is possible to shorten the time required for accelerated evaluation.
- Interface field field 3 ⁇ 4 interface field [ ⁇ field t ⁇ 0
- Adhesive Laminate strength (N / 15mm)
- the solar cell back surface sealing sheet having the configuration of the present invention has been studied when evaluating a solar cell module that is used only in an environment actually used as a solar cell module. Even in the accelerated evaluation under high temperature and high humidity, it prevents the deterioration of the material due to hydrolysis, and the barrier characteristics as a backside sealing sheet and the electrical output characteristics as a solar cell, which are not only poor appearance due to delamination. Can be maintained.
- the present invention prevents the deterioration of the material due to hydrolysis under high temperature and high humidity in the environment actually used as the solar cell module and the accelerated evaluation of the solar cell module, and the electric output characteristics as the solar cell.
- a sheet for sealing the back surface of a solar cell that is excellent in weather resistance.
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Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA2658010A CA2658010C (en) | 2006-06-21 | 2007-06-21 | Sheet for sealing rear surface of solar cell |
CN2007800242371A CN101479855B (zh) | 2006-06-21 | 2007-06-21 | 太阳能电池背面密封用薄片 |
KR1020097001003A KR101365781B1 (ko) | 2006-06-21 | 2007-06-21 | 태양 전지 이면 밀봉용 시트 |
EP07767327.5A EP2040306A4 (en) | 2006-06-21 | 2007-06-21 | REAR SURFACE SEALING SHEET OF A SOLAR CELL |
US12/308,572 US8507791B2 (en) | 2006-06-21 | 2007-06-21 | Sheet for sealing rear surface of solar cell |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2006171534A JP2008004691A (ja) | 2006-06-21 | 2006-06-21 | 太陽電池裏面封止用シート |
JP2006-171534 | 2006-06-21 |
Publications (1)
Publication Number | Publication Date |
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WO2007148754A1 true WO2007148754A1 (ja) | 2007-12-27 |
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Application Number | Title | Priority Date | Filing Date |
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PCT/JP2007/062501 WO2007148754A1 (ja) | 2006-06-21 | 2007-06-21 | 太陽電池裏面封止用シート |
Country Status (7)
Country | Link |
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US (1) | US8507791B2 (ja) |
EP (1) | EP2040306A4 (ja) |
JP (1) | JP2008004691A (ja) |
KR (1) | KR101365781B1 (ja) |
CN (1) | CN101479855B (ja) |
CA (1) | CA2658010C (ja) |
WO (1) | WO2007148754A1 (ja) |
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WO2010087684A3 (ko) * | 2009-02-02 | 2010-10-21 | 주식회사 엘지화학 | 태양전지 백시트 및 이의 제조방법 |
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CN102459393A (zh) * | 2009-06-15 | 2012-05-16 | 东洋油墨Sc控股株式会社 | 聚氨酯树脂、活性能量线固化性粘合剂及太阳能电池用背面保护片 |
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- 2007-06-21 EP EP07767327.5A patent/EP2040306A4/en not_active Withdrawn
- 2007-06-21 US US12/308,572 patent/US8507791B2/en not_active Expired - Fee Related
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Also Published As
Publication number | Publication date |
---|---|
CA2658010C (en) | 2015-05-19 |
CN101479855B (zh) | 2012-03-28 |
US20100229945A1 (en) | 2010-09-16 |
US8507791B2 (en) | 2013-08-13 |
JP2008004691A (ja) | 2008-01-10 |
CA2658010A1 (en) | 2007-12-27 |
CN101479855A (zh) | 2009-07-08 |
EP2040306A1 (en) | 2009-03-25 |
EP2040306A4 (en) | 2015-12-16 |
KR20090034883A (ko) | 2009-04-08 |
KR101365781B1 (ko) | 2014-02-21 |
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