WO2013051661A1 - Film de polyester blanc destiné à des cellules solaires, feuille d'étanchéité arrière de cellule solaire et module de cellule solaire qui utilisent celui-ci - Google Patents

Film de polyester blanc destiné à des cellules solaires, feuille d'étanchéité arrière de cellule solaire et module de cellule solaire qui utilisent celui-ci Download PDF

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Publication number
WO2013051661A1
WO2013051661A1 PCT/JP2012/075835 JP2012075835W WO2013051661A1 WO 2013051661 A1 WO2013051661 A1 WO 2013051661A1 JP 2012075835 W JP2012075835 W JP 2012075835W WO 2013051661 A1 WO2013051661 A1 WO 2013051661A1
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Prior art keywords
polyester film
film
solar cell
layer
white polyester
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PCT/JP2012/075835
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English (en)
Japanese (ja)
Inventor
池畠　良知
清水　亮
潤 稲垣
澤崎　真治
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東洋紡株式会社
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Priority to JP2012554545A priority Critical patent/JP5288068B1/ja
Publication of WO2013051661A1 publication Critical patent/WO2013051661A1/fr

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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
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
    • 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
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/08—Mirrors
    • G02B5/0808—Mirrors having a single reflecting layer
    • 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
    • H01L31/0481—Encapsulation of modules characterised by the composition of the encapsulation material
    • 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
    • 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
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/402—Coloured
    • B32B2307/4026—Coloured within the layer by addition of a colorant, e.g. pigments, dyes
    • 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 white polyester film for solar cells that has high whiteness and good light reflectivity and is excellent in light resistance and hydrolysis resistance, a solar cell back surface sealing sheet and a solar cell module using the same. .
  • a constituent member such as a back surface sealing sheet for sealing the back surface is used for the solar cell module, and a base film is used for these constituent members. Since solar cells are used outdoors for a long period of time, durability to the natural environment is required for these components and the base films used for these components.
  • a fluorine-based film, a polyethylene-based film, or a polyester-based film to which a white pigment or the like is added has been used for the purpose of improving UV resistance, concealment, and the like ( Patent Documents 1 to 9).
  • an object of the present invention is a white polyester film for solar cells, which has high whiteness and good light reflectivity, and is excellent in environmental durability represented by light resistance and hydrolysis resistance. It is providing the solar cell backside sealing sheet and solar cell module which used this.
  • the white polyester film for a solar cell according to the present invention that can solve the above problems has a whiteness of 50 or more, an average reflectance of 50 to 95% in a wavelength range of 400 to 800 nm, and an acid value of 1 to 50 eq / ton, a polyester film for solar cells having a thickness of 30 to 380 ⁇ m, and has a multilayer structure in which an inorganic fine particle concentration containing layer containing 10 to 35% by mass of inorganic fine particles is disposed as at least one outermost layer.
  • the thickness of the concentrated inorganic fine particle layer is 5 to 30% with respect to the total thickness of the polyester film, and the content of the inorganic fine particles in the entire polyester film is 2 to 10% by mass.
  • the inorganic fine particles are preferably titanium dioxide mainly composed of rutile type.
  • the white polyester film for solar cells of the present invention preferably has a thermal shrinkage rate of 0.2 to 3.0% at 150 ° C. in the longitudinal direction.
  • the breaking elongation retention after the accelerated hydrolysis test is preferably 60 to 100% under the conditions of 105 ° C., 100% RH, 0.03 MPa, and 200 hours treatment.
  • the white polyester film for solar cells of the present invention has a breaking elongation retention ratio of 35% or more after the accelerated light deterioration test under the conditions of 63 ° C., 50% RH, UV irradiation intensity of 100 mW / cm 2 , and irradiation for 100 hours. Is preferred.
  • the change in the color b * value after the accelerated light deterioration test is preferably 12 or less.
  • a coating layer containing a polyurethane resin containing an aliphatic polycarbonate polyol as a constituent component may be disposed on at least one surface of the polyester film.
  • this invention embeds in the solar cell backside sealing sheet using the said white polyester film for solar cells, and the filler layer adjacent to a solar cell backside sealing sheet and a solar cell backside sealing sheet, and a filler layer.
  • a solar cell module including the solar cell element thus formed is also included.
  • the white polyester film for solar cells of the present invention has both light reflectivity and environmental durability.
  • the white polyester film for a solar cell of the present invention it is possible to provide an inexpensive and lightweight solar cell backside sealing sheet and a solar cell module having excellent light reflectivity and excellent environmental durability. It has become possible.
  • the white polyester film for solar cells according to the present invention has a whiteness of 50 or more, an average reflectance in the wavelength range of 400 to 800 nm, 50 to 95%, an acid value of 1 to 50 eq / ton, and a thickness of 30 to 380 ⁇ m.
  • a polyester film for solar cells having a multilayer structure in which an inorganic fine particle concentration-containing layer containing 10 to 35% by mass of inorganic fine particles is disposed as at least one outermost layer, and the thickness of the inorganic fine particle concentration content layer Is 5 to 30% of the total thickness of the polyester film, and the content of inorganic fine particles in the entire polyester film is 2 to 10% by mass.
  • the polyester resin used in the white polyester film for solar cells of the present invention includes aromatic dicarboxylic acids or esters thereof such as terephthalic acid, isophthalic acid, naphthalenedicarboxylic acid, ethylene glycol, butylene glycol, diethylene glycol, 1,4- It is produced by polycondensation with glycols such as butanediol and neopentyl glycol, and may be a homopolymer or a copolymer obtained by copolymerizing a third component.
  • aromatic dicarboxylic acids or esters thereof such as terephthalic acid, isophthalic acid, naphthalenedicarboxylic acid, ethylene glycol, butylene glycol, diethylene glycol, 1,4- It is produced by polycondensation with glycols such as butanediol and neopentyl glycol, and may be a homopolymer or a copolymer obtained by copolymerizing a third component
  • polyester resins include polyethylene terephthalate, polybutylene terephthalate, polyethylene-2,6-naphthalate, and the like.
  • the molar ratio of the ethylene terephthalate unit, butylene terephthalate unit or ethylene-2,6-naphthalate unit is preferably 70 mol% or more, more preferably 80 mol% or more, and more preferably 90 mol% or more. Further preferred.
  • the above polyester resin is a method of polycondensation after transesterification of alkyl ester of aromatic dicarboxylic acid and glycol, diglycol of aromatic dicarboxylic acid It can be produced by a method in which an ester is polycondensed.
  • Examples of the polycondensation catalyst include antimony compounds, titanium compounds, germanium compounds, tin compounds, aluminum and / or aluminum compounds, phosphorus compounds having an aromatic ring in the molecule, and aluminum salts of phosphorus compounds.
  • the thermal stability of the polyester resin can be further enhanced by removing the catalyst from the polyester resin or deactivating the catalyst by adding a phosphorus compound or the like. Further, an appropriate amount of the polycondensation catalyst may coexist within a range in which no problem occurs in the characteristics, processability, and color tone of the polyester resin.
  • dialkylene glycol is by-produced during the esterification reaction of terephthalic acid or the transesterification reaction of dimethyl terephthalate.
  • the resulting film may have reduced heat resistance when exposed to a high temperature environment. Therefore, the content of dialkylene glycol in the polyester resin used in the present invention is preferably suppressed within a certain range.
  • the content of diethylene glycol in the polyester resin is preferably 2.3 mol% or less, more preferably 2.0 mol% or less, and 1.8 mol%.
  • the following is more preferable.
  • the content of diethylene glycol is 2.3 mol% or less, the thermal stability can be increased, and an increase in acid value due to decomposition during drying and molding can be suppressed.
  • the lower limit of the content is realistically 1.0 mol%, Furthermore, 1.2 mol%.
  • the intrinsic viscosity of the polyester resin used is preferably 0.65 dl / g or more, more preferably 0.67 dl / g or more, preferably 0.90 dl / g or less, 0 .75 dl / g or less is more preferable.
  • the intrinsic viscosity of the polyester resin within the above range, good productivity can be obtained, and the hydrolysis resistance and heat resistance of the formed film can be enhanced.
  • the intrinsic viscosity is lower than 0.65 dl / g, the formed film may have poor hydrolysis resistance and heat resistance.
  • it is higher than 0.90 dl / g the productivity may decrease.
  • the carboxyl terminal of the polyester resin represented by the acid value has an action of promoting hydrolysis by autocatalysis.
  • the acid value of the white polyester film for solar cell of the present invention is in the range of 1 to 50 eq / ton relative to the polyester.
  • the acid value is preferably 2 eq / ton or more, more preferably 3 eq / ton or more, preferably 40 eq / ton or less, more preferably 30 eq / ton or less with respect to the polyester.
  • an acid value is larger than 50 eq / ton, the hydrolysis resistance of a film falls and early deterioration tends to occur.
  • the acid value of the polyester resin used as the raw resin is preferably less than 50 eq / ton, more preferably 25 eq / ton or less, and further preferably 20 eq / ton or less.
  • the acid value of the polyester resin or film can be measured by a titration method described later.
  • the polymerization conditions of the resin specifically, the production equipment factors such as the structure of the esterification reactor, and the dicarboxylic acid and glycol of the slurry supplied to the esterification reactor
  • esterification reaction conditions such as composition ratio, esterification reaction temperature, reaction pressure, and reaction time, or solid layer polymerization conditions.
  • It is also effective to control the moisture content of the polyester chip supplied to the extruder or to control the resin temperature in the melting step.
  • the moisture content of the polyester chip is preferably 100 ppm or less, more preferably 50 ppm or less, and even more preferably 30 ppm or less.
  • the heating temperature is preferably from 100 to 200 ° C, more preferably from 120 to 180 ° C.
  • the drying time is preferably 1 hour or longer, more preferably 3 hours or longer, and even more preferably 6 hours or longer.
  • the melting temperature is preferably 280 to 310 ° C, more preferably 290 to 300 ° C.
  • the back pressure during filtration in the extruder can be reduced, and good productivity can be achieved.
  • the melting temperature is higher than 310 ° C., thermal degradation of the resin proceeds, Since an acid value rises, the hydrolysis resistance of the obtained film may fall.
  • the polyester resin contains one or many kinds of various additives such as a fluorescent brightening agent, an ultraviolet ray inhibitor, an infrared absorbing dye, a heat stabilizer, a surfactant, and an antioxidant depending on the purpose of use. It can also be made.
  • various additives such as a fluorescent brightening agent, an ultraviolet ray inhibitor, an infrared absorbing dye, a heat stabilizer, a surfactant, and an antioxidant depending on the purpose of use. It can also be made.
  • Antioxidants such as aromatic amines and phenols can be used as antioxidants, and thermal stabilizers such as phosphoric acid and phosphoric acid esters such as phosphorous, sulfur esters, and amines can be used.
  • the agent can be used.
  • the inorganic fine particles used for the white polyester film for solar cells of the present invention are not particularly limited, and are titanium dioxide, barium sulfate, silica, kaolinite, talc, calcium carbonate, zeolite, alumina, carbon black, oxidation. Examples thereof include zinc and zinc sulfide. From the viewpoint of improving whiteness and productivity, titanium dioxide or barium sulfate which is a white pigment is preferable, and titanium dioxide is more preferable.
  • the average particle size of the inorganic fine particles is preferably 0.1 ⁇ m or more, more preferably 0.5 ⁇ m or more, preferably 3 ⁇ m or less, and more preferably 2.5 ⁇ m or less.
  • the average particle size of the inorganic fine particles can be determined by the following electron microscope method. Specifically, the inorganic fine particles are observed with a scanning electron microscope, the magnification is appropriately changed according to the size of the particles, a photograph is taken, and the photographed photograph is enlarged and at least 100 or more randomly selected. The outer circumference of each particle is traced, and the equivalent circle diameter of the particle is measured from these trace images with an image analyzer, and the average value thereof is taken as the average particle diameter.
  • the inorganic fine particles used in the film of the present invention are preferably titanium dioxide fine particles mainly composed of rutile type.
  • titanium dioxide two crystal forms, mainly rutile type and anatase type, are known.
  • the anatase type has a characteristic that the spectral reflectance of ultraviolet rays is very large
  • the rutile type has a characteristic that the absorption rate of ultraviolet rays is large (that is, the spectral reflectance is small).
  • Paying attention to the difference in spectral characteristics of titanium dioxide crystal form it is possible to improve the light resistance of the film suitably by using the rutile UV absorption performance, and to reduce the coloration due to light deterioration of the film. Is possible.
  • it is excellent in light resistance, even if it does not add another ultraviolet absorber substantially. For this reason, problems such as contamination due to bleeding out of the ultraviolet absorber and a decrease in adhesion are unlikely to occur.
  • the “main body” here means that the content of rutile titanium dioxide in all titanium dioxide fine particles exceeds 50 mass%. Further, the content of anatase-type titanium dioxide in all the titanium dioxide fine particles is preferably 10% by mass or less, more preferably 5% by mass or less, and most preferably 0% by mass. If the content of anatase-type titanium dioxide exceeds 10% by mass, the content of rutile-type titanium dioxide in the total fine titanium dioxide particles will be reduced, resulting in insufficient UV absorption performance. Titanium has a strong photocatalytic action, and this action also tends to reduce light resistance. Rutile titanium dioxide and anatase titanium dioxide can be distinguished by X-ray structure diffraction and spectral absorption characteristics.
  • the surface of the titanium dioxide fine particles mainly composed of the rutile type of the present invention may be subjected to inorganic treatment with alumina or silica, or organic treatment with silicone or alcohol.
  • the film of the present invention can exhibit excellent light resistance even under light irradiation. Specifically, when UV irradiation is performed for 100 hours at 63 ° C., 50% RH and irradiation intensity of 100 mW / cm 2 , the elongation at break of the film is preferably maintained at 35% or more, more preferably 40% or more. Can do. As described above, the film of the present invention is also suitable as a back surface sealing sheet for solar cells used outdoors because the photodecomposition and deterioration are suppressed by light irradiation.
  • a known method can be used to add inorganic fine particles to the film.
  • a master batch method in which a polyester resin and inorganic fine particles are previously mixed with an extruder.
  • a polyester resin that has not been dried in advance and inorganic fine particles are put into an extruder, and a method of preparing a master batch while degassing moisture and air can be adopted. It is preferable to prepare a masterbatch by using it because an increase in the acid value of the polyester resin can be suppressed.
  • a method of producing a masterbatch while degassing or a method of producing a masterbatch without deaeration using a sufficiently dried polyester resin can be mentioned.
  • the acid value of the polyester resin can be suitably kept low while containing high concentrations of inorganic fine particles, so that high whiteness and light reflectance are achieved. While having it, it is easy to obtain a film having both light resistance and hydrolysis resistance.
  • the drying conditions are preferably 100 to 200 ° C., more preferably 120 to 180 ° C., preferably 1 hour or more, more preferably 3 hours or more, and further preferably 6 hours or more. Thereby, it is sufficiently dried so that the moisture content of the polyester resin is preferably 50 ppm or less, more preferably 30 ppm or less.
  • premixing method is not particularly limited, and may be a batch method or a single-screw or twin-screw kneading extruder.
  • an inorganic fine particle concentration containing layer containing 10 to 35% by mass of inorganic fine particles is disposed as at least one outermost layer. Moreover, 11 mass% or more is preferable, as for content of the inorganic fine particle in an inorganic fine particle concentration containing layer, 28 mass% or less is preferable, and 21 mass% or less is more preferable.
  • the content of inorganic fine particles in the entire film is 2 to 10% by mass. Preferably, they are 3 mass% or more and 8 mass% or less.
  • the white polyester film for solar cells of the present invention has a laminated structure of at least two layers, and may have a multilayer structure higher than that, but at least one of the layers containing a large amount of inorganic fine particles (inorganic fine particle concentration containing layer) is present.
  • the structure is the outermost layer.
  • the layer containing inorganic fine particles is the A layer and the other layer having a smaller content of inorganic fine particles than the layer containing the inorganic fine particles is the B layer, the A layer / B layer, A layer / B layer / A layer, etc. Configuration can be taken.
  • Preferred configurations include a two-layer configuration, and when the back sheet is formed, the film itself and the inner layer constituting the back sheet are arranged by arranging a layer containing a large amount of inorganic particles in the outermost layer on the side in direct contact with sunlight. It effectively prevents deterioration of member films, sheets and adhesive layers due to ultraviolet rays.
  • inorganic fine particles having a certain high concentration are added to the layer, so that the surface roughness increases and it becomes difficult to obtain adhesion between the layers.
  • concentration of inorganic fine particles on the opposite surface can be kept low.
  • the thickness of the skin layer (A layer) that is the outermost layer with respect to the entire film layer (one side, or The total thickness of the double-sided skin layers is 5-30%.
  • the thickness ratio of the skin layer (A layer) is preferably 8% or more, more preferably 10% or more, and further preferably 15% or more. Moreover, 28% or less is preferable, 25% or less is more preferable, and 25% or less is further more preferable.
  • the thickness ratio of the skin layer is lower than the lower limit, film light deterioration may gradually progress in the thickness direction. Moreover, when the thickness ratio of a skin layer is higher than the said upper limit, it exists in the tendency for the hydrolysis resistance of the whole film to be inferior.
  • the white polyester film for solar cells of the present invention preferably has a two-layer structure that satisfies the above thickness ratio. Photodegradation progresses gradually in the thickness direction from the outermost layer where sunlight directly enters. Therefore, the concentration of the inorganic fine particle concentration layer is provided in the outermost layer on the side where sunlight directly enters rather than being divided into several layers, thereby concentrating the function of efficiently preventing light deterioration on this layer. be able to.
  • an inorganic fine particle concentration-containing layer is disposed in the intermediate layer, there is a risk of film peeling due to resin deterioration. From such a viewpoint, the inorganic fine particle concentration-containing layer is the most on the side where sunlight directly enters.
  • the film of the present invention has a two-layer structure, and the concentration of inorganic fine particles is concentrated in the outermost layer on the side where sunlight directly enters, and the entire film is kept low in inorganic fine particle content, resulting in high whiteness and light reflection. Rate, UV resistance, and hydrolysis resistance can be made highly compatible.
  • ⁇ Other layers with low content of inorganic fine particles> In the white polyester film for solar cells of the present invention, another layer having a smaller content of inorganic fine particles than the above-mentioned concentration layer containing inorganic fine particles may be included.
  • the content of the inorganic fine particles in the other layer should be less than the content of the inorganic fine particles in the inorganic fine particle concentration-containing layer, but for the above reason, the difference from the content of the inorganic fine particles in the inorganic fine particle concentration-containing layer is different. 10 mass% or more is preferable.
  • ⁇ Functional layer> When various functions such as easy adhesion, insulation, and scratch resistance are required for the white polyester film for solar cell of the present invention, the surface thereof may be coated with a polymer resin by coating or the like. Moreover, when slipperiness is requested
  • the coating layer is formed on at least one surface of the film using an aqueous coating solution containing at least one of water-soluble or water-dispersible copolymer polyester resin, acrylic resin and polyurethane resin. It is preferable to provide it.
  • these coating liquids include aqueous coating liquids disclosed in Japanese Patent No. 3567927, Japanese Patent No. 3589232, Japanese Patent No. 3589233, and the like.
  • a polyurethane resin is included in the aqueous coating liquid in order to exhibit easy adhesion to the filler layer.
  • a polyurethane resin which uses aliphatic polycarbonate polyol as a structural component from the point of yellowing prevention by sunlight.
  • Examples of the aliphatic polycarbonate polyol include aliphatic polycarbonate diol and aliphatic polycarbonate triol.
  • the number average molecular weight of the aliphatic polycarbonate diol is preferably 1500 to 4000, more preferably 2000 to 3000. If the number average molecular weight of the aliphatic polycarbonate diol is less than 1500, a hard urethane component increases, stress due to thermal contraction of the substrate cannot be relieved, and adhesiveness may decrease. Moreover, when a number average molecular weight exceeds 4000, the adhesiveness and the intensity
  • the molar ratio of the aliphatic polycarbonate polyol is preferably 3 mol% or more, more preferably 5 mol% or more, preferably 60 mol% or less, when the total polyisocyanate component of the polyurethane resin is 100 mol%, preferably 40 mol% or less. % Or less is more preferable. If the molar ratio is less than 3 mol%, water dispersibility may be difficult. On the other hand, if it exceeds 60 mol%, the water resistance is lowered and the heat and moisture resistance is lowered.
  • the glass transition temperature of the polyurethane resin is not particularly limited, but is preferably less than 0 ° C, more preferably less than -5 ° C. As a result, the viscosity is close to that of partially melted olefin resin such as EVA or PVB at the time of pressure bonding, and the adhesiveness is improved by partial mixing, and suitable flexibility is easily achieved.
  • the manufacturing method of the white polyester film for solar cells of this invention is not restrict
  • a polyester chip containing a large amount of inorganic fine particles (resin chip for a layer containing inorganic fine particles) and a polyester chip containing less inorganic fine particles
  • they may be laminated in a molten state and extruded from the same die.
  • the moisture content of the polyester chip is preferably 100 ppm or less, more preferably 50 ppm or less, and even more preferably 30 ppm or less.
  • the heating temperature is preferably from 100 to 200 ° C, more preferably from 120 to 180 ° C.
  • the drying time is preferably 1 hour or longer, more preferably 3 hours or longer, and even more preferably 6 hours or longer.
  • the melting temperature of the polyester chip in the extruder is preferably 280 to 310 ° C, more preferably 290 to 300 ° C.
  • the melting temperature is preferably 280 to 310 ° C, more preferably 290 to 300 ° C.
  • polyester resin for forming each layer melted in separate extruders is laminated in a molten state, extruded from the same die into a sheet, and taken out with a cooling roll to form an unstretched film.
  • the obtained unstretched film is stretched by biaxial orientation treatment.
  • the stretching method the obtained unstretched film is heated with a heating roll or a non-contact heater, then stretched between rolls having a speed difference (roll stretching), and then uniaxially stretched with a clip.
  • It is equipped with a sequential biaxial stretching method that stretches in the width direction (tenter stretching) after heating in the oven and then heat-sets by applying higher heat, and a mechanism that can simultaneously stretch in the vertical and horizontal directions
  • Examples thereof include a simultaneous biaxial stretching method in which stretching is performed with a tenter (tenter simultaneous biaxial stretching), and an inflation stretching method in which stretching is performed by expanding with air pressure.
  • a method of the longitudinal relaxation treatment a known method, for example, a method of performing longitudinal relaxation treatment by gradually narrowing the clip interval of the tenter (Japanese Patent Publication No. 4-0221818), a razor in the tenter, An example is a method in which the longitudinal relaxation treatment is performed by cutting the portion to avoid the influence of the clip (Japanese Patent Publication No. 57-54290). Further, a method of relaxing by applying heat off-line may be used. Furthermore, in the said extending process, high thermal dimensional stability can also be provided to a film by controlling extending
  • the surface of the film can be coated with a polymer resin by coating or the like, and inorganic and / or organic particles can be included in the coating layer.
  • the method of providing is not particularly limited.
  • the coating layer may be provided after film formation (off-line coating method), or film formation It may be provided inside (in-line coating method). From the viewpoint of productivity, it is preferably provided during film formation.
  • the thickness of the white polyester film for solar cells of the present invention is 30 to 380 ⁇ m. 35 ⁇ m or more is preferable, 40 ⁇ m or more is more preferable, 250 ⁇ m or less is preferable, and 230 ⁇ m or less is more preferable.
  • the thickness of the film is excellent in electrical insulation, and is easily reduced in weight and thickness.
  • the thickness of the film is larger than 380 ⁇ m, it is difficult to cope with the reduction in weight and thickness.
  • an electrical insulation effect is hard to show
  • the whiteness degree of the white polyester film for solar cells of the present invention is 50 or more, preferably 60 or more. When the whiteness is less than 50, the concealability is inferior, and it is difficult to visually check the film when processing the solar cell module, which may reduce the processing efficiency.
  • the average reflectance of the white polyester film for solar cells of the present invention in the wavelength range of 400 to 800 nm is 50% or more, preferably 60% or more. Further, the higher the average reflectance, the better. However, in reality, the upper limit is about 95%. When the reflectance is less than 50%, the film itself and the solar cell internal member are deteriorated by light, which is not preferable.
  • the thermal shrinkage rate at 150 ° C. of the white polyester film for solar cell of the present invention is preferably 0.2% or more, more preferably 0.4% or more, and preferably 3.0% or less in the longitudinal direction, 1.8 % Or less is more preferable. This suppresses the occurrence of curling during heat processing or in a laminated state. On the other hand, if the heat shrinkage rate is less than 0.2%, the film may bend during processing. Moreover, when larger than 3.0%, the shrinkage
  • As a method of setting the heat shrinkage rate at 150 ° C. within the above range it can be carried out by controlling stretching conditions or by applying longitudinal relaxation treatment and transverse relaxation treatment in the heat setting step.
  • the white polyester film for solar cells of the present invention preferably has a vertical and horizontal orientation balance. That is, the MOR value (MOR-C) when the film thickness is converted to 50 ⁇ m is preferably 1.0 or more, more preferably 1.3 or more, preferably 2.0 or less, and more preferably 1.8 or less. Thereby, the vertical and horizontal orientation balance of the film is adjusted, and the mechanical strength and durability are easily maintained. Further, curling during the lamination is suppressed, and adhesion is improved.
  • the method of setting MOR-C within the above range can be carried out by controlling the ratio of the longitudinal and lateral stretching ratios in the stretching step.
  • the white polyester film for solar cells of the present invention can exhibit high hydrolysis resistance that can withstand long-term use outdoors.
  • the breaking elongation retention of the film after accelerated hydrolysis test (105 ° C., 100% RH, 0.03 MPa, treatment for 200 hours) is preferably 60% or more, preferably It can be maintained at 70% or more and 100% or less.
  • the white polyester film for solar cells of the present invention is suppressed from photolysis and deterioration even under light irradiation, it can exhibit excellent light resistance that can withstand long-term use outdoors.
  • the breaking elongation retention of the film after the accelerated light deterioration test (63 ° C., 50% RH, UV irradiation intensity 100 mW / cm 2 , irradiation for 100 hours) is 35% or more, Preferably, it can be maintained at 40% or more.
  • the change in the color b * value after the accelerated light deterioration test of the white polyester film for solar cell of the present invention is preferably 12 or less, and more preferably 10 or less.
  • the change in the color b * value is greater than 12, the appearance deteriorates due to secular change, which is not preferable.
  • the film surface is preferably smooth.
  • the three-dimensional surface roughness (SRa) of the white polyester film for solar cells of the present invention is preferably 0.1 ⁇ m or less.
  • the white polyester film for solar cells of the present invention has both environmental durability represented by light resistance and hydrolysis resistance, whiteness and light reflectivity, and excellent electrical insulation. Therefore, the conventional durable layer (hydrolysis-resistant layer), white layer and insulating layer can be integrated. Therefore, it can respond to weight reduction and thin film by using the white polyester film for solar cells of this invention for a solar cell backside sealing sheet.
  • the white polyester film for solar cells of the present invention can be used as a base film (base film) for a solar cell backside sealing sheet or a bonding material for flexible electronic members.
  • base film for a solar cell backside sealing sheet or a bonding material for flexible electronic members.
  • it is suitable as a base film for a solar cell backside sealing sheet that requires high environmental durability.
  • the solar cell backside sealing sheet referred to in the present invention is a sheet that protects the solar cell module on the back side of the solar cell by being used on the surface in contact with the filler layer of the solar cell module and / or the outermost surface of the solar cell module. It is characterized by using the white polyester film for solar cells of the present invention.
  • the white polyester film for a solar cell of the present invention can be used as a solar cell back surface sealing sheet alone or in combination of two or more.
  • a water vapor barrier layer such as a water vapor barrier film or an aluminum foil can be laminated on the white polyester film for solar cells of the present invention.
  • steam barrier layer it can laminate
  • a polyvinylidene fluoride coating film As the water vapor barrier film, a polyvinylidene fluoride coating film, a silicon oxide vapor deposition film, an aluminum oxide vapor deposition film, an aluminum vapor deposition film, or the like can be used.
  • the solar cell module in the present invention refers to a system that takes in incident light such as sunlight and room light, converts it into electricity, and stores the electricity.
  • the solar cell back surface sealing sheet and the solar cell back surface sealing sheet And a solar cell element embedded in the filler layer.
  • Resin used for the filler layer is not particularly limited, and examples thereof include olefin resins such as EVA and PVB.
  • the solar cell module of the present invention may include a surface protection sheet, a high light transmission material, and the like, and may have a flexible property depending on the application.
  • ⁇ Average particle size of inorganic fine particles The inorganic fine particles were observed with a scanning electron microscope, and the magnification was appropriately changed according to the size of the particles, and photographs were taken. An enlarged copy of the photograph was taken, and the circumference of each particle was traced for at least 100 fine particles selected at random, and the equivalent circle diameters of the particles were measured from these trace images with an image analysis device. The average value was defined as the average particle size.
  • polyester (IV) ⁇ Intrinsic viscosity of polyester (IV)>
  • the polyester was dissolved in a 6/4 (mass ratio) mixed solvent of phenol / 1,1,2,2-tetrachloroethane, and the intrinsic viscosity was measured at a temperature of 30 ° C.
  • the solid content was removed by centrifugation, and then the measurement was performed.
  • the acid value of the film or the raw material polyester resin was measured by the following method.
  • the whiteness of the film was measured by using JIS L 1015-1981 method using Z-1001DP manufactured by Nippon Denshoku Industries Co., Ltd.
  • ⁇ Average reflectance of film> An integrating sphere is attached to a spectrophotometer (manufactured by Shimadzu Corporation, self-recording spectrophotometer “UV-3150”), and the reflectance of a standard white plate (manufactured by SphereOptics, white standard plate “ZRS-99-010-W”) was calibrated as 100%, and the spectral reflectance was measured. The measurement was performed in 1 nm increments in the wavelength range of 400 to 800 nm, and the average value was obtained. In the case of a single film, measurement was performed by placing a non-reflective black mount on the back of the sample film. Measurement was performed by applying light from the concentrated inorganic fine particle containing layer side.
  • HAST Highly Accelerated Temperature and Humidity Stress Test
  • JIS C 60068-2-66 JIS C 60068-2-66
  • the sample film was cut into a size of 70 mm ⁇ 190 mm, and a jig was used to keep the distance where they did not contact each other.
  • EHS-221 manufactured by ESPEC CORP. Treatment was performed at 105 ° C., 100% RH, 0.03 MPa, 200 hours.
  • Breaking elongation retention ratio (%) [(breaking elongation after treatment) ⁇ 100] / (breaking elongation before treatment)
  • Breaking elongation retention ratio (%) [(breaking elongation after treatment) ⁇ 100] / (breaking elongation before treatment)
  • x is less than 60%, o is 60% or more and less than 80%, and o is 80% or more.
  • ⁇ Heat shrinkage at 150 ° C. in the longitudinal direction (HS150)> The sample film was cut into 10 mm ⁇ 250 mm, and the long side was aligned in the direction in which measurement was desired, and marks were made at intervals of 200 mm, and the mark interval A was measured under a constant tension of 5 g. Subsequently, the sample film was allowed to stand in an oven at 150 ° C. under no load for 30 minutes, and then removed from the oven and cooled to room temperature. Thereafter, the mark interval B was determined under a constant tension of 5 g, and the thermal shrinkage (%) was determined by the following formula.
  • ⁇ MOR-C> The obtained film was divided into 5 equal parts in the width direction, 100 mm square samples were taken at the respective positions in the longitudinal direction and the width direction, and a microwave transmission type molecular orientation meter (manufactured by Oji Scientific Instruments, MOA-6004) was used. And measured. The thickness correction was 50 ⁇ m, MOR-C was determined, and an average value of 5 points was used.
  • peeling When the surface of the sample film is peeled off at 50% or more of the peeled area of the adhesive tape B, it is defined as “peeling”. When the frequency of “peeling” is less than half after 5 or more repetitions, “ ⁇ ” (excellent surface strength) The case of more than half was evaluated as “ ⁇ ” (poor surface strength).
  • ⁇ Adhesiveness> Prepare the film obtained in Example 13 to 100 mm ⁇ 100 mm and the following EVA sheet cut out to 70 mm ⁇ 90 mm, and prepare a film / EVA sheet / film (all films have the coating layer surface facing the EVA sheet)
  • the sample was prepared by stacking with the structure of 2) and thermocompression bonding under the following adhesion conditions.
  • the produced sample was cut out to 20 mm ⁇ 100 mm, and then attached to a SUS plate, and the peel strength between the film layer and the EVA sheet layer was measured using a tensile tester under the following conditions.
  • the peel strength was determined as the average value of the parts that were stably peeled after exceeding the maximum point.
  • the ranking was based on the following criteria.
  • PET resin pellet I (PET-I)
  • a slurry comprising 86.4 parts by mass of terephthalic acid and 64.4 parts by mass of ethylene glycol was prepared.
  • 0.017 parts by mass of antimony trioxide and 0.16 parts by mass of triethylamine were added as catalysts.
  • the pressure was increased and the pressure esterification reaction was performed under the conditions of a gauge pressure of 3.5 kgf / cm 2 (343 kPa) and 240 ° C.
  • the inside of the esterification reaction vessel was returned to normal pressure, and 0.071 part by mass of magnesium acetate tetrahydrate and then 0.014 part by mass of trimethyl phosphate were added. Furthermore, the temperature was raised to 260 ° C. over 15 minutes, and 0.012 part by mass of trimethyl phosphate and then 0.0036 part by mass of sodium acetate were added. After 15 minutes, the resulting esterification reaction product was transferred to a polycondensation reaction can, gradually heated from 260 ° C. to 280 ° C. under reduced pressure, and subjected to a polycondensation reaction at 285 ° C.
  • PET resin pellet (PET-I) had an intrinsic viscosity of 0.616 dl / g, an acid value of 15.1 eq / ton, and contained substantially no inert particles and internally precipitated particles.
  • PET resin pellet II PET resin pellet I (PET-I) was pre-crystallized in advance at 160 ° C. and then solid-phase polymerized in a nitrogen atmosphere at 220 ° C. to obtain intrinsic viscosity.
  • PET resin pellet III (PET-III) Except for changing the polycondensation reaction time, the same method as PET resin pellet I (PET-I) was used, and the intrinsic viscosity was 0.51 dl / g, and the acid value was 39 eq. / Ton PET resin pellet III (PET-III) was obtained.
  • PET resin pellet IV (Preparation of polycondensation catalyst solution)
  • ethylene glycol phosphorus compound
  • 200 g of Irganox (registered trademark) 1222 manufactured by Ciba Specialty Chemicals (currently BASF) was added.
  • An in-line mixer having a high-speed stirrer was installed in the transfer line from the third esterification reaction tank to the first polycondensation reaction tank, comprising three continuous esterification reaction tanks and three polycondensation reaction tanks.
  • 0.75 part by mass of ethylene glycol was continuously supplied to the slurry preparation tank with respect to 1 part by mass of high-purity terephthalic acid.
  • the first esterification reaction tank is 250 ° C. and 110 kPa
  • the second esterification reaction tank is 260 ° C. and 105 kPa
  • the third esterification reaction tank is 260 ° C.
  • the prepared slurry is continuously supplied to the polyester oligomer.
  • 0.025 mass part of ethylene glycol was continuously thrown into the 2nd esterification reaction tank.
  • the obtained oligomer was continuously transferred to a continuous polycondensation apparatus consisting of three reaction vessels, and an ethylene glycol solution of an aluminum compound and an ethylene glycol of a phosphorus compound prepared by the above method in an in-line mixer installed in a transfer line.
  • the initial polycondensation reaction was carried out by continuously adding the solution while stirring with a continuous mixer so as to be 0.015 mol% and 0.036 mol% as aluminum atoms and phosphorus atoms, respectively, with respect to the acid component in the polyester.
  • the polycondensation was conducted at 265 ° C. and 9 kPa, the medium-term polycondensation reaction vessel at 265 to 268 ° C. and 0.7 kPa, the final polycondensation reaction vessel at 273 ° C. and 13.3 Pa, an intrinsic viscosity of 0.63 dl / g, and an acid value of 10 PET resin pellet IV (PET-IV) of 5 eq / ton was obtained.
  • PET-IV PET resin pellet IV
  • PET resin pellet V (PET-V) Using the obtained PET resin pellet IV (PET-IV), solid phase polymerization was performed at 220 ° C. under a reduced pressure of 0.5 mmHg using a rotary vacuum polymerization apparatus. As a result, PET resin pellets V (PET-V) having an intrinsic viscosity of 0.73 dl / g and an acid value of 5.0 eq / ton were obtained.
  • Example 1 The raw material of the fine particle concentration containing layer (A layer) in which 60% by mass of PET-II and 40% by mass of MB-II are mixed, and another layer in which 86% by mass of PET-II and 14% by mass of MB-II are mixed ( The raw materials of layer B) were put into separate extruders, mixed and melted at 285 ° C., and then joined in a molten state to form layer A / layer B using a feed block. At this time, the discharge rate ratio of the A layer and the B layer was controlled using a gear pump. Next, it was extruded onto a cooling drum adjusted to 30 ° C. using a T-die to produce an unstretched sheet.
  • the obtained unstretched sheet was uniformly heated to 75 ° C. using a heating roll, and heated to 100 ° C. with a non-contact heater to perform 3.3-fold roll stretching (longitudinal stretching).
  • the resulting uniaxially stretched film is guided to a tenter, heated to 140 ° C, stretched 4.0 times, fixed in width, heat treated at 215 ° C for 5 seconds, and further relaxed 4% in the width direction at 210 ° C. By doing so, a white polyester film roll for solar cells having a thickness of 80 ⁇ m was obtained.
  • Example 2 The white polyester film roll for solar cells was obtained by the same method as Example 1 except having changed the raw material composition of A layer and B layer as shown in Table 1.
  • Example 3 The white polyester film roll for solar cells was obtained by the same method as Example 1 except having changed the raw material composition of A layer and B layer as shown in Table 1.
  • Example 4 The white polyester film roll for solar cells was obtained by the same method as Example 1 except having changed the raw material composition of A layer and B layer as shown in Table 1.
  • Example 5 The white polyester film roll for solar cells was obtained by the same method as Example 4 except having changed the discharge amount and speed so that film roll thickness might be set to 50 micrometers.
  • Example 6 A white polyester film roll for solar cells was obtained in the same manner as in Example 5 except that the raw material compositions of the A layer and the B layer were changed as shown in Table 1.
  • Example 7 A white polyester film roll for solar cells was obtained in the same manner as in Example 5 except that the raw material compositions of the A layer and the B layer were changed as shown in Table 1.
  • Example 8 A white polyester film roll for solar cells was obtained in the same manner as in Example 5 except that the longitudinal draw ratio was 3.1 times and the discharge rate and speed were changed so that the film roll thickness was 188 ⁇ m.
  • Example 9 A white color for solar cells was obtained in the same manner as in Example 5 except that the longitudinal draw ratio was 3.0 times, the transverse draw ratio was 3.7 times, and the discharge amount and speed were changed so that the film roll thickness was 350 ⁇ m. A polyester film roll was obtained.
  • Example 10 A white polyester film roll for solar cells was obtained in the same manner as in Example 5 except that the raw material compositions of the A layer and the B layer were changed as shown in Table 1.
  • Example 11 The film roll obtained in Example 1 was passed through an offline coater set to a temperature of 160 ° C., and the relaxation treatment was performed by adjusting the speed and tension to obtain a white polyester film roll for solar cells.
  • Example 12 A white polyester film roll for solar cells was obtained in the same manner as in Example 1 except that the feed block was changed to have a configuration of A layer / B layer / A layer.
  • Example 13 Apply the coating solution prepared above on the B layer side of the uniaxially stretched film after longitudinal stretching by the roll coating method so that the final (after biaxial stretching) coating amount after drying is 0.15 g / m 2. After that, a white polyester film roll for a solar cell was obtained in the same manner as in Example 1 except that it was dried at 80 ° C. for 20 seconds.
  • Table 2 shows the physical properties of the film rolls obtained in Examples 1 to 13.
  • Comparative Examples 3-5 A white polyester film roll for solar cells in the same manner as in Example 1 except that the composition of the A layer and the B layer was changed as shown in Table 3 and the discharge rate and speed were changed so that the film roll thickness was 50 ⁇ m. Got.
  • Table 4 shows the physical properties of the film rolls obtained in Comparative Examples 1 to 5.
  • the white polyester film for solar cells of the present invention has excellent whiteness and light reflectivity while having excellent environmental durability and good electrical insulation.
  • a solar cell back surface sealing sheet and a solar cell module that are excellent in environmental durability, are inexpensive and lightweight.

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  • General Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Optics & Photonics (AREA)
  • Photovoltaic Devices (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Laminated Bodies (AREA)

Abstract

L'objet de la présente invention est de fournir : un film de polyester blanc destiné à des cellules solaires qui est doté d'une excellente durabilité environnementale caractérisée par une solidité à la lumière et une résistance à l'hydrolyse, tout en étant pourvu d'un bon pouvoir réfléchissant ; et une feuille d'étanchéité arrière de cellule solaire ainsi qu'un module de cellule solaire qui utilisent ledit film de polyester blanc. Le film de polyester blanc destiné à des cellules solaires selon la présente invention, au moyen duquel l'objet susmentionné est atteint, est caractérisé en ce que la blancheur est au moins égale à 50, le facteur de réflexion moyen à une longueur d'onde de 400 à 800 nm est de 50 à 95 %, l'indice d'acidité est de 1 à 50 eq/tonne, et l'épaisseur est de 30 à 380 μm. Le film de polyester blanc destiné à des cellules solaires est en outre caractérisé en ce qu'il est doté d'une structure multicouche dans laquelle une couche contenant une concentration de fines particules inorganiques, qui contient de fines particules inorganiques à hauteur de 10 à 35 % en masse, est positionnée en tant qu'au moins une des couches extérieures, l'épaisseur de la couche contenant une concentration de fines particules inorganiques est de 5 à 30 % de l'épaisseur de la totalité du film de polyester et la teneur en fines particules inorganiques est de 2 à 10 % en masse de la totalité du film de polyester.
PCT/JP2012/075835 2011-10-07 2012-10-04 Film de polyester blanc destiné à des cellules solaires, feuille d'étanchéité arrière de cellule solaire et module de cellule solaire qui utilisent celui-ci WO2013051661A1 (fr)

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WO2016152638A1 (fr) * 2015-03-20 2016-09-29 東洋紡株式会社 Film de polyester blanc pour une cellule solaire, feuille d'étanchéité arrière comprenant ce dernier pour une cellule solaire et module de cellule solaire
JPWO2016009755A1 (ja) * 2014-07-14 2017-04-27 富士フイルム株式会社 太陽熱発電用反射板

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JP6096135B2 (ja) * 2014-02-05 2017-03-15 富士フイルム株式会社 白色ポリエステルフィルム及びその製造方法、並びに太陽電池モジュール及びその製造方法
TWI746359B (zh) * 2021-01-29 2021-11-11 南亞塑膠工業股份有限公司 聚酯薄膜及其製造方法

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JP2011097012A (ja) * 2009-09-29 2011-05-12 Toyobo Co Ltd 太陽電池裏面保護膜用ポリエステルフィルム
JP2011140124A (ja) * 2010-01-05 2011-07-21 Toyobo Co Ltd 太陽電池用易接着性白色ポリエステルフィルム

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WO2010079798A1 (fr) * 2009-01-07 2010-07-15 東洋紡績株式会社 Film polyester pour couche de protection de surface arrière de cellule solaire
CN102668116A (zh) * 2009-12-03 2012-09-12 东丽株式会社 太阳能电池背面密封片材用膜
JP5352839B2 (ja) * 2012-01-27 2013-11-27 隆志 矢野 自動車のドア装置

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JP2011097012A (ja) * 2009-09-29 2011-05-12 Toyobo Co Ltd 太陽電池裏面保護膜用ポリエステルフィルム
WO2011040161A1 (fr) * 2009-09-30 2011-04-07 東洋紡績株式会社 Film polyester pour protéger les surfaces arrières des cellules photovoltaïques
JP2011140124A (ja) * 2010-01-05 2011-07-21 Toyobo Co Ltd 太陽電池用易接着性白色ポリエステルフィルム

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JPWO2016009755A1 (ja) * 2014-07-14 2017-04-27 富士フイルム株式会社 太陽熱発電用反射板
WO2016152638A1 (fr) * 2015-03-20 2016-09-29 東洋紡株式会社 Film de polyester blanc pour une cellule solaire, feuille d'étanchéité arrière comprenant ce dernier pour une cellule solaire et module de cellule solaire
KR20170128773A (ko) 2015-03-20 2017-11-23 도요보 가부시키가이샤 태양전지용 백색 폴리에스테르 필름, 이를 사용한 태양전지 이면 봉지 시트 및 태양전지 모듈
CN107408595A (zh) * 2015-03-20 2017-11-28 东洋纺株式会社 太阳能电池用白色聚酯薄膜、使用其的太阳能电池背面密封片材及太阳能电池组件
US20180062013A1 (en) * 2015-03-20 2018-03-01 Toyobo Co., Ltd. White polyester film for a solar cell, sealing sheet for back surface of solar cell using same, and solar cell module
EP3273488A4 (fr) * 2015-03-20 2018-10-31 Toyobo Co., Ltd. Film de polyester blanc pour une cellule solaire, feuille d'étanchéité arrière comprenant ce dernier pour une cellule solaire et module de cellule solaire
US10475943B2 (en) * 2015-03-20 2019-11-12 Toyobo Co., Ltd. White polyester film for a solar cell, sealing sheet for back surface of solar cell using same, and solar cell module
CN107408595B (zh) * 2015-03-20 2020-03-10 东洋纺株式会社 太阳能电池用白色聚酯薄膜、使用其的太阳能电池背面密封片材及太阳能电池组件
KR102434140B1 (ko) * 2015-03-20 2022-08-18 도요보 가부시키가이샤 태양전지용 백색 폴리에스테르 필름, 이를 사용한 태양전지 이면 봉지 시트 및 태양전지 모듈

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