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WO2010116635A1 - Feuille de protection pour module de cellules solaires et module de cellules solaires la comprenant - Google Patents

Feuille de protection pour module de cellules solaires et module de cellules solaires la comprenant Download PDF

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Publication number
WO2010116635A1
WO2010116635A1 PCT/JP2010/002077 JP2010002077W WO2010116635A1 WO 2010116635 A1 WO2010116635 A1 WO 2010116635A1 JP 2010002077 W JP2010002077 W JP 2010002077W WO 2010116635 A1 WO2010116635 A1 WO 2010116635A1
Authority
WO
WIPO (PCT)
Prior art keywords
sheet
solar cell
cell module
syndiotactic polystyrene
polystyrene resin
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2010/002077
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English (en)
Japanese (ja)
Inventor
▲高▼梨誉也
加藤揮一郎
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Lintec Corp
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Lintec Corp
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Filing date
Publication date
Application filed by Lintec Corp filed Critical Lintec Corp
Publication of WO2010116635A1 publication Critical patent/WO2010116635A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • 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
    • B32B27/08—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 of synthetic resin
    • 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
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/302—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers
    • 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
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/304—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
    • 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
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B32B27/322—Layered products comprising a layer of synthetic resin comprising polyolefins comprising halogenated polyolefins, e.g. PTFE
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
    • H10F19/00—Integrated devices, or assemblies of multiple devices, comprising at least one photovoltaic cell covered by group H10F10/00, e.g. photovoltaic modules
    • H10F19/80—Encapsulations or containers for integrated devices, or assemblies of multiple devices, having photovoltaic cells
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
    • H10F19/00—Integrated devices, or assemblies of multiple devices, comprising at least one photovoltaic cell covered by group H10F10/00, e.g. photovoltaic modules
    • H10F19/80—Encapsulations or containers for integrated devices, or assemblies of multiple devices, having photovoltaic cells
    • H10F19/85—Protective back sheets
    • 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
    • B32B2250/00—Layers arrangement
    • B32B2250/24—All layers being polymeric
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/712—Weather resistant
    • 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
    • B32B2457/00—Electrical equipment
    • B32B2457/12—Photovoltaic modules
    • 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

Definitions

  • the present invention relates to a protective sheet for a solar cell module used as a surface protective sheet or a back surface protective sheet of a solar cell module. Furthermore, this invention relates to a solar cell module provided with the said protection sheet for solar cell modules.
  • FIG. 4 is a schematic cross-sectional view showing an example of a general solar cell module.
  • the solar battery module 100 includes a solar battery cell 104 made of crystalline silicon, amorphous silicon, etc., a sealing material (filling layer) 103 made of an electrical insulator that seals the solar battery cell 104, and the surface of the sealing material 103.
  • stacked on the back surface of the sealing material 103 are roughly comprised.
  • the front sheet 101 may be a glass plate as a base material.
  • the surface protection sheet (front sheet) 101 and the back surface protection sheet (back sheet) 102 are collectively referred to as “protection sheet”.
  • the solar cell 104 and the sealing material 103 are protected from wind, rain, moisture, dust, mechanical impact, etc. It is necessary to keep the inside of the solar cell module sealed from the outside air. For this reason, it is calculated
  • a protective sheet for a solar cell module a protective sheet for a solar cell module using a polyester film such as polyethylene terephthalate having excellent electrical insulation has been developed, and weather resistance and durability mentioned as disadvantages using the polyester film Film containing an ultraviolet absorber (see Patent Document 1), a film defining the amount of cyclic oligomer in polyester (see Patent Documents 2 and 3), and a film defining the molecular weight of polyester (Patent Document 4)
  • Patent Document 1 A protective sheet using the reference is disclosed.
  • the solar cell module protective sheet disclosed in the prior art is improved in weather resistance and durability as compared with a protective sheet using polyethylene terephthalate, but a polyester film as a base sheet. Therefore, there has always been a problem of deterioration due to hydrolysis of the base sheet.
  • the present invention has been made in view of the above circumstances, and has a high weather resistance and durability, and a solar cell module protective sheet that can be used stably for a long period of time, and the solar cell module It aims at providing the solar cell module which uses a protection sheet.
  • the protective sheet for a solar cell module of the present invention is a laminate including a syndiotactic polystyrene resin sheet.
  • the solar cell module protective sheet of the present invention is preferably configured by laminating a fluororesin layer on at least one surface of a syndiotactic polystyrene resin sheet.
  • the solar cell module protective sheet of the present invention is preferably configured by laminating a support sheet on at least one surface of a syndiotactic polystyrene resin sheet.
  • the protective sheet for a solar cell module of the present invention is configured by laminating a fluororesin layer on one surface of a syndiotactic polystyrene resin sheet and laminating a support sheet on the other surface of the syndiotactic polystyrene resin sheet. It is preferable that
  • this invention provides a solar cell module provided with the said protection sheet for solar cell modules.
  • the protective sheet for a solar cell module of the present invention is a laminate including a syndiotactic polystyrene resin sheet, the solar cell does not deteriorate due to hydrolysis of the resin sheet itself, and is extremely excellent in weather resistance and durability.
  • a protective sheet for modules can be provided.
  • the solar cell module of the present invention is constructed by adhering the solar cell module protective sheet to one or both of the front surface and the back surface, the solar cell module has excellent weather resistance and durability, and stable long-term solar cells. Can be used.
  • FIG. 1 is a schematic sectional drawing which shows 1st embodiment of the protection sheet for solar cell modules of this invention, and the protection sheet for solar cell modules of Example 1.
  • FIG. is a schematic sectional drawing which shows 2nd embodiment of the protection sheet for solar cell modules of this invention.
  • It is a schematic sectional drawing which shows 3rd embodiment of the protection sheet for solar cell modules of this invention.
  • 3 is a schematic cross-sectional view showing a solar cell module protective sheet of Example 2.
  • the protective sheet for a solar cell module of the present invention is a laminate including a syndiotactic polystyrene resin sheet.
  • the syndiotactic polystyrene resin sheet in the present invention is not particularly limited as long as it is a sheet or film made of a polystyrene resin having a syndiotactic structure (may be abbreviated as “SPS” in the present specification).
  • the syndiotactic structure is a three-dimensional structure in which the three-dimensional structure is a syndiotactic structure, that is, a phenyl group or a substituted phenyl group that is a side chain with respect to the main chain formed from a carbon-carbon bond is alternately located in the opposite direction.
  • the tacticity is quantified by a nuclear magnetic resonance method ( 13 C-NMR method) using isotope carbon.
  • the tacticity measured by 13 C-NMR method is the abundance ratio of a plurality of consecutive structural units, for example, 2 dyads (2 doublings), 3 cases triads (3 doublings), 5 In the case of individual, it can be indicated by pentad (pentad), but as the polystyrene resin having a syndiotactic structure in the present invention, it is 75 mol% or more with racemic dyad, or 30 mol% or more with racemic pentad. Polystyrene resins having a syndiotacticity of
  • the molecular weight of the SPS is not particularly limited, but the weight average molecular weight is preferably 10,000 or more and 1,500,000 or less, more preferably 50,000 or more and 500,000 or less. Furthermore, the molecular weight distribution is not particularly limited in its width, and SPS having various molecular weight distributions can be used.
  • the glass transition temperature (Tg) of the SPS is not particularly limited, but is preferably 80 to 120 ° C. from the viewpoint of film forming properties.
  • the melting point (Tm) of the SPS is not particularly limited, but is preferably 230 to 350 ° C., more preferably 240 to 330 ° C., and further preferably 250 to 320 ° C. from the viewpoint of film forming properties.
  • the thickness of the syndiotactic polystyrene resin sheet in the present invention may be adjusted based on the electrical insulation required by the solar cell system, and the thickness of the sheet is usually in the range of 10 to 300 ⁇ m.
  • the thickness is preferably in the range of 20 to 200 ⁇ m from the viewpoint of light weight and electrical insulation.
  • syndiotactic polystyrene resin sheet in the present invention examples include, for example, XAREC (trade name) manufactured by Idemitsu Kosan Co., Ltd.
  • the syndiotactic polystyrene resin sheet in the present invention can be subjected to a surface modification treatment for improving weather resistance, moisture resistance and the like.
  • a surface modification treatment for improving weather resistance, moisture resistance and the like.
  • silica (SiO 2 ), aluminum (Al), alumina (Al 2 O 3 ), etc. on a syndiotactic polystyrene resin sheet
  • the weather resistance, moisture resistance, etc. of the solar cell module protection sheet Can be increased.
  • the vapor deposition process of the said silica, aluminum, an alumina, etc. may be performed on both surfaces of a syndiotactic polystyrene-type resin sheet, and may be performed only on any one surface.
  • the protective sheet for a solar cell module of the present invention is a laminate including the syndiotactic polystyrene resin sheet.
  • first embodiment, the second embodiment, and the third embodiment will be described in order to specifically describe the configuration of the protective sheet for a solar cell module of the present invention. This embodiment is specifically described for better understanding of the gist of the invention and does not limit the present invention unless otherwise specified.
  • FIG. 1 is a schematic sectional drawing which shows 1st embodiment of the protection sheet for solar cell modules of this invention.
  • the solar cell module protective sheet 10 of this embodiment forms a laminated structure in which a fluororesin layer 21 is laminated on a syndiotactic polystyrene resin sheet 22.
  • examples of the syndiotactic polystyrene resin sheet 22 include the same as those mentioned in the syndiotactic polystyrene resin sheet in the present invention.
  • the fluororesin layer 21 is not particularly limited as long as it does not impair the effects of the present invention and contains a fluorine atom.
  • seat which has a fluorine-containing polymer may be sufficient
  • coated the coating material which has a fluorine-containing polymer may be sufficient. From the viewpoint of making the fluororesin layer thinner in order to reduce the weight of the protective sheet for solar cell module, a coating film coated with a paint having a fluorine-containing polymer is preferable.
  • the sheet having the fluorine-containing polymer for example, a sheet obtained by processing a polymer mainly composed of polyvinyl fluoride (PVF), ethylene chlorotrifluoroethylene (ECTFE), or ethylene tetrafluoroethylene (ETFE) into a sheet shape is preferable.
  • PVF polyvinyl fluoride
  • ECTFE ethylene chlorotrifluoroethylene
  • ETFE ethylene tetrafluoroethylene
  • the thickness of the sheet having a fluorine-containing polymer is generally preferably in the range of 5 to 200 ⁇ m, more preferably in the range of 10 to 100 ⁇ m, and most preferably in the range of 10 to 50 ⁇ m from the viewpoint of weather resistance and weight reduction.
  • the paint having a fluorine-containing polymer is not particularly limited as long as it can be applied by being dissolved in a solvent or dispersed in water.
  • the fluorine-containing polymer which may be contained in the paint is not particularly limited as long as it is a polymer containing a fluorine atom without impairing the effects of the present invention.
  • the fluorine-containing polymer is soluble in the paint solvent (organic solvent or water). Those that can be crosslinked are preferred.
  • fluorine-containing polymer examples include chlorotrifluoroethylene (CTFE) such as LUMIFLON (trade name) manufactured by Asahi Glass Co., Ltd., CEFLAR COAT (trade name) manufactured by Central Glass Co., Ltd., and FLUONATE (trade name) manufactured by DIC Corporation.
  • CTFE chlorotrifluoroethylene
  • TFE tetrafluoroethylene
  • ZEFFLE trade name
  • Zonyl trade name
  • DuPont Unidine manufactured by Daikin Industries, Ltd.
  • examples thereof include polymers having a fluoroalkyl group such as (trade name) and polymers having a fluoroalkyl unit as a main component.
  • a polymer containing CTFE as a main component and a polymer containing TFE as a main component are more preferable.
  • the LUMIFLON (trade name) and the ZEFFLE (trade name) are preferable. Most preferred.
  • the LUMIFLON (trade name) is an amorphous polymer containing CTFE and several kinds of specific alkyl vinyl ethers and hydroxyalkyl vinyl ethers as main structural units.
  • a polymer having a monomer unit of hydroxyalkyl vinyl ether, such as LUMIFLON (trade name) is preferable because it is excellent in solvent solubility, crosslinking reactivity, substrate adhesion, pigment dispersibility, hardness, and flexibility.
  • the ZEFFLE (trade name) is a copolymer of TFE and an organic solvent-soluble hydrocarbon olefin. Among them, the copolymer having a hydrocarbon olefin having a highly reactive hydroxyl group is a solvent-soluble, cross-linking reaction. This is preferable because of its excellent properties, substrate adhesion, and pigment dispersibility.
  • fluorine-containing polymer examples include fluoroolefin polymers having a curable functional group. Specific examples include TFE, isobutylene, vinylidene fluoride (VdF), and hydroxybutyl. Preferred examples include copolymers composed of vinyl ether and other monomers, and copolymers composed of TFE, VdF, hydroxybutyl vinyl ether and other monomers.
  • Examples of the copolymerizable monomer in the fluorine-containing polymer that may be contained in the paint include, for example, vinyl acetate, vinyl propionate, butyl butyrate, vinyl isobutyrate, vinyl pivalate, vinyl caproate, vinyl versatate, Examples include vinyl esters of carboxylic acids such as vinyl laurate, vinyl stearate, vinyl cyclohexylcarboxylate, and vinyl benzoate, and alkyl vinyl ethers such as methyl vinyl ether, ethyl vinyl ether, butyl vinyl ether, and cyclohexyl vinyl ether.
  • the coating material may contain a crosslinking agent, a catalyst, and a solvent, and may further contain an inorganic compound such as a pigment and a filler, if necessary.
  • the solvent contained in the paint is not particularly limited as long as it does not impair the effects of the present invention.
  • methyl ethyl ketone (MEK), cyclohexanone, acetone, methyl isobutyl ketone (MIBK), toluene, xylene, methanol, isopropanol, ethanol , Heptane, ethyl acetate, isopropyl acetate, n-butyl acetate, or n-butyl alcohol can be preferably used.
  • the said solvent has any 1 or more types among MIBK or MEK from a soluble viewpoint of the component contained in a coating material.
  • the pigment that may be contained in the paint is not particularly limited as long as the effect of the present invention is not impaired.
  • titanium dioxide, carbon black, silica and the like can be mentioned.
  • Ti-Pure R105 (trade name; manufactured by DuPont), which is a rutile type titanium dioxide that has been coated and surface-treated in order to impart durability, and the surface treatment of dimethylsilicone to form hydroxyl groups on the silica surface.
  • a preferable example is CAB-O-SIL TS 720 (trade name; manufactured by Cabot), which is a modified hydrophobic silica.
  • the coating film is preferably cured with a crosslinking agent in order to improve weather resistance and scratch resistance.
  • the crosslinking agent is not particularly limited as long as it does not impair the effects of the present invention, and examples thereof preferably include metal chelates, silanes, isocyanates, and melamines. When it is assumed that the solar cell module protective sheet is used outdoors for 30 years or more, aliphatic isocyanates are preferable as the cross-linking agent from the viewpoint of weather resistance.
  • the composition of the paint is not particularly limited as long as the effects of the present invention are not impaired.
  • LUMIFLON trade name
  • a pigment a crosslinking agent, a solvent, and a catalyst are mixed.
  • LUMIFLON trade name
  • the composition ratio when the entire coating is 100 mass%, LUMIFLON (trade name) is preferably 3 to 80 mass%, more preferably about 10 to 60 mass%, and the pigment and filler are 5 to 60 mass%.
  • % By mass is preferable, and about 10 to 40% by mass is more preferable, and the organic solvent is preferably 20 to 80% by mass.
  • Examples of the organic solvent include a mixed solvent of MEK, xylene, and cyclohexanone.
  • examples of the catalyst include tin dibutyl dilaurate and tin dioctyl dilaurate, which are used to promote crosslinking between LUMIFLON (trade name) and isocyanate.
  • the paint As a method of applying the paint to one or the other surface of the syndiotactic polystyrene resin sheet 22, it can be performed by a known method, and for example, it may be applied so as to have a desired film thickness with a rod coater.
  • the film thickness of the fluororesin layer 21 formed by curing the paint is not particularly limited, and may be, for example, a film thickness of 5 ⁇ m or more. From the viewpoint of water vapor barrier properties, weather resistance, and light weight, the thickness of the fluororesin layer 21 is preferably 5 to 100 ⁇ m, more preferably 8 to 50 ⁇ m, and even more preferably 10 to 30 ⁇ m.
  • the temperature in the drying process of the applied paint may be any temperature that does not impair the effects of the present invention, and promotes crosslinking of the paint forming the fluororesin layer 21 and causes thermal damage to the syndiotactic polystyrene resin sheet 22. From the viewpoint of reduction, it is preferably in the range of about 50 to 150 ° C.
  • the fluororesin layer 21 is laminated on the syndiotactic polystyrene resin sheet 22. Furthermore, durability and weather resistance can be improved.
  • FIG. 2 is a schematic cross-sectional view showing a second embodiment of the solar cell module protective sheet of the present invention.
  • the same components as those of the solar cell module protection sheet 10 shown in FIG. 2 are identical components as those of the solar cell module protection sheet 10 shown in FIG.
  • the solar cell module protective sheet 20 of this embodiment forms a laminated structure in which a support sheet 24 is laminated on a syndiotactic polystyrene resin sheet 22.
  • the method for laminating the syndiotactic polystyrene resin sheet 22 and the support sheet 24 is not particularly limited as long as the effects of the present invention are not impaired. As shown in FIG. 2, the syndiotactic polystyrene resin sheet is used.
  • An adhesive layer 23 is further provided between the support sheet 24 and the support sheet 24, and the syndiotactic polystyrene resin sheet 22 and the support sheet 24 can be laminated via the adhesive layer 23.
  • the adhesive layer 23 preferably includes an adhesive having adhesiveness to the syndiotactic polystyrene resin sheet 22 and the support sheet 24.
  • the adhesive is not particularly limited as long as it does not impair the effects of the present invention, and examples thereof include acrylic adhesives, urethane adhesives, epoxy adhesives, ester adhesives, and silicone adhesives. . Of these, urethane adhesives are preferable from the viewpoint of adhesiveness.
  • the surface of the syndiotactic polystyrene resin sheet 22 and the support sheet 24 on the adhesive layer 23 side may be subjected to corona treatment and / or chemical treatment.
  • Examples of the support sheet 24 in the solar cell module protective sheet 20 of the present invention include a thermal adhesive sheet, a resin sheet, and an aluminum sheet.
  • the solar cell module protective sheet 20 is not used as the front sheet 101 and is used as the back sheet 102 because it does not have optical transparency.
  • thermal adhesive sheet is not particularly limited as long as it is a resin sheet having thermal adhesiveness without impairing the effects of the present invention.
  • thermal adhesiveness is a property that develops adhesiveness by heat treatment.
  • the temperature in the heat treatment is usually in the range of 50 to 200 ° C.
  • the heat-adhesive sheet for example, a resin sheet made of a polymer mainly composed of ethylene vinyl acetate (EVA), polyvinyl butyral (PVB), ethylene methacrylic acid copolymer or polyolefin is preferable. More preferably, it is a resin sheet.
  • the sealing material 103 is often a resin made of EVA, and in that case, the thermal adhesive sheet is a resin sheet made of a polymer mainly composed of EVA, so that the sealing material 103 and the heat Compatibility with the adhesive sheet and adhesion can be improved.
  • the thickness of the heat-adhesive sheet may be appropriately adjusted depending on the type of the heat-adhesive sheet, and is preferably in the range of 5 to 200 ⁇ m. More specifically, when the thermal adhesive sheet is a sheet made of EVA, the thickness of the EVA sheet is preferably in the range of 10 to 200 ⁇ m from the viewpoints of light weight and electrical insulation. The range of 50 to 150 ⁇ m is more preferable, and the range of 80 to 120 ⁇ m is most preferable.
  • the method for laminating the heat-adhesive sheet on the syndiotactic polystyrene resin sheet 22 is not particularly limited as long as the effect of the present invention is not impaired, and the heat-adhesive resin is dissolved in a solvent or dispersed in water. May be applied to the syndiotactic polystyrene resin sheet 22 to form a coating film. As shown in FIG. 2, a sheet of heat adhesive resin and a syndiotactic polystyrene resin sheet 22 may be used. Further, an adhesive layer 23 may be further provided, and the thermal adhesive sheet and the syndiotactic polystyrene resin sheet 22 may be laminated via the adhesive layer 23.
  • resin sheet used for the support sheet 24 those generally used as a resin sheet in a protective sheet for a solar cell module can be used.
  • resin sheets include polyethylene, polypropylene, non-syndiotactic polystyrene, polymethyl methacrylate, polyamide (nylon 6, nylon 66), polyacrylonitrile, polyvinyl chloride, polyethylene terephthalate (PET), polybutylene terephthalate.
  • PET polyethylene terephthalate
  • PET polybutylene terephthalate
  • sheets made of polymers such as (PBT), polyethylene naphthalate (PEN), polyoxymethylene, polycarbonate, polyphenylene oxide, polyester urethane, poly m-phenylene isophthalamide, poly p-phenylene terephthalamide.
  • the thickness of the resin sheet may be adjusted based on the electrical insulation required by the solar cell system, and the thickness of the sheet is usually preferably in the range of 10 to 300 ⁇ m.
  • the resin sheet can be subjected to a surface modification treatment for improving weather resistance, moisture resistance and the like.
  • a surface modification treatment for improving weather resistance, moisture resistance and the like.
  • silica (SiO 2 ), aluminum (Al), alumina (Al 2 O 3 ), and the like on the PET sheet the weather resistance, moisture resistance, and the like of the solar cell module protection sheet can be improved.
  • the vapor deposition process of the said silica, aluminum, an alumina, etc. may be performed on both surfaces of a resin sheet, and may be performed only on either one surface.
  • the aluminum sheet used for the support sheet 24 is not particularly limited as long as it does not impair the effects of the present invention, but an aluminum-iron alloy containing iron in the range of 0.7 to 5.0% by mass is made into a sheet form. Those are preferred. Specific examples include those classified into alloy number 8021 defined in JIS H4160. For example, PACAL21 (trade name) manufactured by Nihon Foil Co., Ltd. can be preferably used as the aluminum-iron alloy in the form of a sheet. Also, BESPA (trade name) manufactured by Sumi Light Aluminum Foil Co., Ltd. can be preferably used.
  • the water vapor barrier property and lightness of the solar cell module protective sheet 20 when used as a back sheet can be achieved rather than using a pure aluminum sheet. Can be increased.
  • an aluminum-iron alloy containing iron within the above range is generally superior in rolling processability compared to pure aluminum, and therefore, even when processed into a sheet having a thickness of 20 ⁇ m or less, pinholes are less likely to occur. It is considered that the gas flow through the pinhole can be suppressed, and as a result, the water vapor barrier property of the solar cell module protective sheet 20 when used as a back sheet can be enhanced.
  • it since it is excellent in rolling processability, it can be processed into a sheet thinner than a pure aluminum sheet while maintaining the water vapor barrier property. As a result, the back sheet using the aluminum-iron alloy sheet is lightweight. Can be increased.
  • the aluminum-iron alloy sheet may contain an element other than iron as long as the effects of the present invention are not impaired.
  • an element other than iron for example, magnesium, manganese, copper, silicon, zinc, titanium, etc. are mentioned. These elements may be inevitably contained in the production process of the aluminum-iron alloy, but generally it is considered that the effect of the present invention is not impaired if the content is very small.
  • a trace amount content the case where each element is 0.5 mass% or less respectively, More preferably, it is the case where it is 0.3 mass% or less.
  • the thickness of the aluminum-iron alloy sheet is not particularly limited as long as the effects of the present invention are not impaired. From the viewpoint of low pinhole occurrence frequency (high water vapor barrier property), light weight, etc., preferably It is 30 ⁇ m or less, more preferably 20 ⁇ m or less, and most preferably 5 to 10 ⁇ m.
  • the solar cell module protective sheet 20 can be easily thermally bonded to the sealing material 103 constituting the solar cell module. it can.
  • the support sheet 24 in the solar cell module protective sheet 20 is an aluminum sheet, weather resistance and water vapor barrier properties as a back sheet of the solar cell module protective sheet 20 can be improved.
  • the support sheet 24 in the solar cell module protective sheet 20 is a resin sheet, the electrical insulation of the solar cell module protective sheet 20 can be further improved.
  • the support sheet 24 is laminated on the syndiotactic polystyrene resin sheet 22, so that in addition to the effects of the syndiotactic polystyrene resin sheet 22, further The effect of the support sheet 24 can be imparted.
  • FIG. 3 is a schematic cross-sectional view showing a third embodiment of the solar cell module protective sheet of the present invention.
  • the solar cell module protective sheet 30 of the present embodiment includes a surface of the syndiotactic polystyrene resin sheet 22 on which the support sheet 24 is laminated. Forms a laminated structure in which the fluororesin layer 21 is laminated on the opposite surface (back surface).
  • the same effects as those of the solar cell module protective sheet 20 of the second embodiment described above can be obtained, and further, the fluororesin layer 21 is laminated. , Durability and weather resistance can be improved.
  • the support sheet 24 is preferably a thermal adhesive sheet.
  • the protective sheet for a solar cell module of the present invention can be used as a solar cell module by combining conventionally known materials for forming a solar cell module.
  • the solar cell module of the present invention includes a solar cell 104 made of crystalline silicon, amorphous silicon, and the like, and a sealing material (filling layer) made of an electrical insulator that seals the solar cell 104. ) 103, a surface protection sheet (front sheet) 101 laminated on the surface of the sealing material 103, and a back surface protection sheet (back sheet) 102 laminated on the back surface of the sealing material 103.
  • the sealing material 103 is mainly composed of a transparent resin such as vinyl acetate-ethylene copolymer (EVA), polyvinyl butyral, silicone resin, epoxy resin, fluorinated polyimide resin, acrylic resin, polyester resin, and ionomer resin. Resin can be used.
  • a transparent resin such as vinyl acetate-ethylene copolymer (EVA), polyvinyl butyral, silicone resin, epoxy resin, fluorinated polyimide resin, acrylic resin, polyester resin, and ionomer resin. Resin can be used.
  • the solar cell module protective sheets 10, 20 and 30 according to the present invention are used as the front sheet 101 and / or the back sheet 102 in FIG.
  • the solar battery cell 104 and the sealing material 103 in the solar battery module are protected from wind and rain, moisture, dust, mechanical shock, etc. Can be kept sealed from the outside air.
  • the protective sheet for a solar cell module of the present invention is laminated on the sealing surface (the front surface and / or the back surface of the sealing material), a known method can be applied.
  • a protective sheet for a solar cell module in which 0 to 1 layers of syndiotactic polystyrene resin sheet 22, fluororesin layer 21, support sheet 24, and adhesive layer 23 are laminated is illustrated.
  • the protective sheet for a solar cell module of the present invention is not limited to this.
  • the protective sheet for a solar cell module of the present invention may have a structure in which a plurality of syndiotactic polystyrene resin sheets, support sheets, adhesive layers and / or fluororesin layers are laminated.
  • Fluororesin coating solution 1 by mixing 10 parts by weight, 0.0001 part by weight tin dioctyl dilaurate as a catalyst, and 30 parts by weight Taipure R-105 (trade name; manufactured by DuPont) which is titanium dioxide as a pigment Was prepared.
  • Example 1 1 is a schematic cross-sectional view showing a protective sheet 10 for a solar cell module of Example 1.
  • FIG. The above fluororesin coating solution 1 is applied on a XAREC-C122 (trade name; manufactured by Idemitsu Kosan Co., Ltd., thickness 30 ⁇ m) as a syndiotactic polystyrene resin sheet 22 with a rod coater and dried at 120 ° C. for 1 minute.
  • a fluororesin layer 21 having a thickness of 15 ⁇ m was formed, and thus the solar cell module protective sheet 10 was produced.
  • FIG. 5 is a schematic cross-sectional view showing the solar cell module protective sheet 40 of Example 2.
  • the above-mentioned adhesive 1 was coated on a XAREC-C122 (trade name; Idemitsu Kosan Co., Ltd., thickness 30 ⁇ m) as a first syndiotactic polystyrene resin sheet 22 with a rod coater and dried at 80 ° C. for 1 minute.
  • an adhesive layer 23 having a thickness of 10 ⁇ m was formed.
  • the formed adhesive layer 23 and a silica vapor-deposited surface of Tech Barrier LX (trade name; manufactured by Mitsubishi Plastics, Inc., 12 ⁇ m thick), which is a silica vapor-deposited polyester film, are laminated at normal temperature as a support sheet 24 to produce syndiotactic polystyrene. / A silica-deposited polyester film laminate was produced. Further, the adhesive 1 was applied on a XAREC-C122 (trade name; manufactured by Idemitsu Kosan Co., Ltd., thickness 30 ⁇ m) as a second syndiotactic polystyrene resin sheet 22 with a rod coater, and then at 80 ° C. for 1 minute.
  • XAREC-C122 (trade name; manufactured by Idemitsu Kosan Co., Ltd., thickness 30 ⁇ m) as a second syndiotactic polystyrene resin sheet 22 with a rod coater, and then at 80 ° C. for 1 minute.
  • the adhesive layer 23 having a thickness of 10 ⁇ m was formed by drying.
  • the formed adhesive layer surface and the polyester surface of the syndiotactic polystyrene / silica vapor-deposited polyester film laminate prepared above were laminated at room temperature to prepare a protective sheet 40 for a solar cell module.
  • Comparative Example 1 Except that the syndiotactic polystyrene resin sheet XAREC-C122 (trade name; manufactured by Idemitsu Kosan Co., Ltd., thickness 30 ⁇ m) was changed to a polyester film, Melinex S (trade name; manufactured by Teijin DuPont Films, Inc., thickness 50 ⁇ m). A protective sheet for a solar cell module was prepared in the same manner as in Example 1.
  • Comparative Example 2 Except for changing the syndiotactic polystyrene resin sheet XAREC-C122 (trade name; manufactured by Idemitsu Kosan Co., Ltd., thickness 30 ⁇ m) to the polyester film Melinex S (trade name; manufactured by Teijin DuPont Films Co., Ltd., thickness 50 ⁇ m), A protective sheet for a solar cell module was prepared in the same manner as in Example 2.
  • Adhesion evaluation In accordance with JIS K5600-5-6, 10 ⁇ 10 squares of 1 mm square grids were produced on the fluororesin layer of the back protective sheet for solar cell modules produced in Example 1 and Comparative Example 1, and cellophane tape (Nichiban Co., Ltd.). Made; CT24) was attached, and the degree of peeling of the fluororesin layer when the tape was peeled off was evaluated. Judgment is represented by the number of squares that do not peel out of 100 squares. The result of this adhesion evaluation is shown in Table 1 as “0 hours” of adhesion.
  • the protective sheet for solar cell module produced in Example 2 and Comparative Example 2 was cut into 90 mm ⁇ 90 mm, and this test piece was used with a water vapor transmission rate measuring device (manufactured by MOCON; trade name: PERMATRAN-W3 / 33).
  • the water vapor barrier property of the solar cell module protective sheet was evaluated under the conditions of 40 ° C. and 90% RH. The result of this water vapor barrier property evaluation is shown in Table 1 as “0 hour” of the water vapor barrier property.
  • the solar cell module protective sheets prepared in Examples 1 and 2 and Comparative Examples 1 and 2 were cut into 15 mm ⁇ 150 mm, and in accordance with JIS K7127-1999, at a test speed of 200 mm / min, 23 ° C., 50% RH.
  • the strength (breaking strength) at the breaking point of the protective sheet for a solar cell module before the acceleration test was conducted: A (0) (N / 15 mm) was measured.
  • the solar cell module protective sheets produced in Examples 1 and 2 and Comparative Examples 1 and 2 were subjected to an accelerated test for 48 hours under the same conditions as in the durability test 1, and the breaking strength: A ( In the same manner as in (0), the breaking strength after the acceleration test is measured: A (1) (N / 15 mm), and the maintenance ratio of the breaking strength before and after the acceleration test is performed (A (1) / A (0) ⁇ 100 (%)) was calculated and shown in Table 1. The closer the fracture strength maintenance rate is to 100%, the better the durability.
  • Examples 1 and 2 relating to the protective sheet for solar cell module of the present invention have better adhesion and water vapor barrier even after the accelerated test which is hot and humid as compared with Comparative Examples 1 and 2. It was confirmed that the strength maintenance rate at the breaking point was high. From this result, it is clear that the protective sheet for a solar cell module of the present invention has excellent weather resistance and durability.
  • the protective sheet for a solar cell module of the present invention is a laminate including a syndiotactic polystyrene resin sheet, the solar cell does not deteriorate due to hydrolysis of the resin sheet itself, and is extremely excellent in weather resistance and durability.
  • a protective sheet for modules can be provided.
  • the solar cell module of the present invention is provided with the solar cell module protective sheet adhered to one or both of the front surface and the back surface, so that it has excellent weather resistance and durability, and stable long-term solar cells. Can be used.

Landscapes

  • Photovoltaic Devices (AREA)
  • Laminated Bodies (AREA)

Abstract

L'invention concerne une feuille de protection pour un module de cellules solaires qui comprend un stratifié contenant une feuille de résine polystyrène syndiotactique. La feuille de protection pour un module de cellules solaires comprend de préférence un stratifié composé d'une feuille de résine de polystyrène syndiotactique et d'une couche de fluororésine disposée sur au moins une surface de la feuille de résine de polystyrène syndiotactique. La feuille de protection pour un module de cellules solaires comprend de préférence un stratifié composé d'une feuille de résine de polystyrène syndiotactique et d'une feuille de support disposée sur au moins une surface de la feuille de résine de polystyrène syndiotactique.
PCT/JP2010/002077 2009-03-30 2010-03-24 Feuille de protection pour module de cellules solaires et module de cellules solaires la comprenant Ceased WO2010116635A1 (fr)

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JP2009081038A JP2010232589A (ja) 2009-03-30 2009-03-30 太陽電池モジュール用保護シートおよびそれを用いてなる太陽電池モジュール
JP2009-081038 2009-03-30

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8507029B2 (en) 2007-02-16 2013-08-13 Madico, Inc. Backing sheet for photovoltaic modules
JP5783384B2 (ja) * 2010-12-02 2015-09-24 日産化学工業株式会社 膜形成材料
US9735298B2 (en) 2007-02-16 2017-08-15 Madico, Inc. Backing sheet for photovoltaic modules

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022108483A1 (de) 2022-04-07 2023-10-12 Schott Ag Vorderseitensubstrat für ein Solarmodul

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004281976A (ja) * 2003-03-19 2004-10-07 Dainippon Printing Co Ltd 透明カバーフィルム
JP2004288693A (ja) * 2003-03-19 2004-10-14 Dainippon Printing Co Ltd 透明基板フィルム

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004281976A (ja) * 2003-03-19 2004-10-07 Dainippon Printing Co Ltd 透明カバーフィルム
JP2004288693A (ja) * 2003-03-19 2004-10-14 Dainippon Printing Co Ltd 透明基板フィルム

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8507029B2 (en) 2007-02-16 2013-08-13 Madico, Inc. Backing sheet for photovoltaic modules
US9735298B2 (en) 2007-02-16 2017-08-15 Madico, Inc. Backing sheet for photovoltaic modules
JP5783384B2 (ja) * 2010-12-02 2015-09-24 日産化学工業株式会社 膜形成材料

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