WO2011096248A1 - Film réfléchissant la lumière permettant une production d'énergie solaire thermique, procédé de fabrication de ce dernier et dispositif de réflexion permettant une production d'énergie solaire thermique à l'aide de ce dernier - Google Patents

Film réfléchissant la lumière permettant une production d'énergie solaire thermique, procédé de fabrication de ce dernier et dispositif de réflexion permettant une production d'énergie solaire thermique à l'aide de ce dernier Download PDF

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Publication number
WO2011096248A1
WO2011096248A1 PCT/JP2011/050255 JP2011050255W WO2011096248A1 WO 2011096248 A1 WO2011096248 A1 WO 2011096248A1 JP 2011050255 W JP2011050255 W JP 2011050255W WO 2011096248 A1 WO2011096248 A1 WO 2011096248A1
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Prior art keywords
power generation
film
layer
solar power
light
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PCT/JP2011/050255
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English (en)
Japanese (ja)
Inventor
村上　修二
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コニカミノルタオプト株式会社
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Priority to JP2011552720A priority Critical patent/JPWO2011096248A1/ja
Publication of WO2011096248A1 publication Critical patent/WO2011096248A1/fr

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/08—Mirrors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
    • F24S23/70—Arrangements for concentrating solar-rays for solar heat collectors with reflectors
    • F24S23/81—Arrangements for concentrating solar-rays for solar heat collectors with reflectors flexible
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S40/00—Safety or protection arrangements of solar heat collectors; Preventing malfunction of solar heat collectors
    • F24S40/40—Preventing corrosion; Protecting against dirt or contamination
    • 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
    • Y02E10/40—Solar thermal energy, e.g. solar towers

Definitions

  • the present invention relates to a light reflective film for solar thermal power generation, a method for producing the same, and a solar power generation reflective apparatus using the same.
  • Natural energy such as coal energy, biomass energy, nuclear energy, wind energy, and solar energy is currently being considered as alternative energy to replace fossil fuel energy such as oil and natural gas.
  • fossil fuel energy such as oil and natural gas.
  • the most stable and abundant amount of natural energy is considered to be solar energy.
  • Patent Document 2 proposes a technique in which a surface layer of a reflective film is provided with a layer containing a benzotriazole-based ultraviolet absorber.
  • a surface layer of a reflective film is provided with a layer containing a benzotriazole-based ultraviolet absorber.
  • Patent Document 3 devises a mirror that multi-layers the reflection film itself including the resin film to the reflection layer and peels the reflection layer together. According to this technology, although the labor of redrawing when the reflective film is deteriorated can be reduced, it is necessary to make the reflective layer itself multi-layered. There was a problem that film peeling and film floating were likely to occur during handling, and the handling property, which is an advantage of the film mirror, was impaired.
  • the present invention has been made in view of the above-mentioned problems and situations, and the solution to the problem is a harsh environment as a light reflecting film for solar power generation (film mirror for solar power generation) while maintaining the handleability as a film mirror. Even when used under a long period of time, it is possible to maintain a high regular reflectance for a long period of time, and it is lightweight and flexible.
  • a method for producing the same, and a solar power generation reflecting device using the light reflecting film for solar power generation is.
  • the present inventor mainly caused a decrease in regular reflectance due to ultraviolet rays of sunlight due to resin discoloration on the film surface and unevenness due to resin deterioration rather than deterioration of the metal reflection layer.
  • the regular reflection function is impaired by the ultraviolet rays of sunlight by making the surface layer easily peelable without using multiple layers including the silver reflection layer as in the technique disclosed in Patent Document 2. Even in this case, it was found that the regular reflectance was recovered by peeling off the surface layer and could be used for a long time.
  • an adhesive layer On the resin base material, as a constituent layer, an adhesive layer, a metal reflective layer, and a solar reflective film light reflecting film provided with two or more protective layers on the light source side from the metal reflective layer, A light reflecting film for solar power generation, wherein at least one layer is peelable.
  • each of the two or more protective layers contains an ultraviolet absorber.
  • the said reflective layer contains inorganic oxide particle
  • the manufacturing method of the light reflective film for solar power generation which manufactures the light reflective film for solar power generation as described in any one of said 1st term
  • the said metal reflective layer is formed by vapor deposition of a metal.
  • the manufacturing method of the light reflection film for solar power generation characterized by having a process.
  • a solar power generation reflecting device which is formed by attaching a solar power generation light reflecting film on a metal base material through an adhesive layer coated on the opposite resin base material surface.
  • a light-reflective film for solar thermal power generation that is light and flexible, has excellent light resistance and weather resistance, and has a good regular reflectance with respect to solar heat, which can reduce the manufacturing cost and increase the area and mass production
  • a manufacturing method thereof can be provided.
  • the solar power generation reflective apparatus using the said solar power generation light reflection film can be provided.
  • the film surface can be easily peeled off even if the film surface is yellowed, clouded, or uneven due to the ultraviolet rays of sunlight or the impact of foreign matter, and the function of regular reflectance is impaired. It can be used to restore the regular reflectivity function and extend the life of the film.
  • the light reflecting film for solar power generation of the present invention is for solar power generation in which two or more protective layers are provided on the resin substrate as a constituent layer on the light source side from an adhesive layer, a metal reflecting layer, and the metal reflecting layer.
  • each of the two or more protective layers contains an ultraviolet absorber from the viewpoint of manifesting the effects of the present invention.
  • at least one layer of the peelable protective layer contains an acrylate resin.
  • the protective layer contains inorganic oxide particles.
  • the main component of the metal constituting the metal reflective layer is silver.
  • the method for producing a light reflecting film for solar thermal power generation according to the present invention is preferably a production method of an embodiment having a step of forming the metal reflective layer by vapor deposition of metal.
  • the light reflecting film for solar power generation of the present invention can be suitably used for a solar power generation reflecting device.
  • a light reflecting film for solar power generation is attached on a metal substrate through an adhesive layer coated on the resin substrate surface opposite to the side having the metal reflection layer with the resin substrate interposed therebetween. It is preferable that it is a solar power generation reflective apparatus of the aspect formed.
  • the solar power generation reflecting device is preferably a mirror structure of a heliostat for tower solar power generation.
  • ⁇ is used to mean that the numerical values described before and after it are included as a lower limit value and an upper limit value.
  • an adhesive layer On the resin base material, as a constituent layer, an adhesive layer, a metal reflective layer, and a solar reflective film light reflecting film provided with two or more protective layers on the light source side from the metal reflective layer, At least one layer is peelable.
  • a metal corrosion prevention layer and other various functional layers may be provided depending on the purpose.
  • the protective layer according to the present invention has a laminated structure of at least two layers and is provided for preventing scratches. In the present invention, at least one of the protective layers is peelable.
  • the protective layer closest to the metal reflective layer does not need to be easily peeled off, but the protective layer placed on the sunlight incident side from the protective layer is placed so that it can be easily peeled off.
  • the outermost protective layer is deteriorated by ultraviolet rays or by scratches, the performance can be maintained for a long time by peeling the deteriorated protective layer and making the inner intact protective layer a resurface layer.
  • At least one protective layer is provided with an “easy peelable adhesive layer” described later.
  • the protective layer can be composed of an acrylic resin, urethane resin, melamine resin, epoxy resin, organic silicate compound, silicone resin, or the like.
  • silicone resins and acrylic resins are preferable in terms of hardness and durability.
  • an active energy ray-curable acrylic resin or a thermosetting acrylic resin is also preferably used.
  • an acrylic resin containing a rubber polymerization component having a glass transition temperature Tg of room temperature or lower is excellent in impact resistance.
  • the active energy ray-curable acrylic resin or the thermosetting acrylic resin is a composition containing a polyfunctional acrylate, an acrylic oligomer or a reactive diluent as a polymerization curing component.
  • Acrylic oligomers include polyester acrylates, urethane acrylates, epoxy acrylates, polyether acrylates, etc., including those in which a reactive acrylic group is bonded to an acrylic resin skeleton, and rigid materials such as melamine and isocyanuric acid. A structure in which an acrylic group is bonded to a simple skeleton can also be used.
  • the reactive diluent has a function of a solvent in the coating process as a medium of the coating agent, and has a group that itself reacts with a monofunctional or polyfunctional acrylic oligomer. It becomes a copolymerization component.
  • polyfunctional acrylic cured paints include Mitsubishi Rayon Co., Ltd. (trade name “Diabeam (registered trademark)” series, etc.), Nagase Sangyo Co., Ltd. (trade name “Denacol (registered trademark)” series, etc. ), Shin-Nakamura Co., Ltd. (trade name “NK Ester” series, etc.), DIC Corporation; (trade name “UNIDIC (registered trademark)” series, etc.), Toagosei Co., Ltd.
  • plastic films such as thermoplastic acrylic film, polycarbonate film, polyarylate film, polyethylene naphthalate film, polyethylene terephthalate film, fluorine film, or resin kneaded with titanium oxide, silica, aluminum powder, copper powder, etc.
  • a resin film subjected to surface processing such as metal vapor deposition is also used. It is preferable to use an acrylic film.
  • the thickness of the film is not particularly limited but is usually preferably in the range of 10 to 125 ⁇ m.
  • various additives can be further blended in the protective layer as necessary within the range where the effects of the present invention are not impaired.
  • stabilizers such as antioxidants and light stabilizers, surfactants, leveling agents and antistatic agents can be used.
  • an ultraviolet absorber in order to protect the reflective layer of resin, silver or the like from the ultraviolet rays of sunlight, and it is more preferred to contain it in the entire protective layer.
  • the leveling agent is effective in reducing surface irregularities, particularly when the functional layer is applied.
  • a dimethylpolysiloxane-polyoxyalkylene copolymer for example, SH190 manufactured by Toray Dow Corning Co., Ltd.
  • silicone leveling agent for example, SH190 manufactured by Toray Dow Corning Co., Ltd.
  • the easily peelable adhesive layer according to the present invention can be selected from a pressure-sensitive adhesive called a re-peeling type and a material called a re-peeling / reattaching type, but any adhesive material having a re-peelable function should be used. Can do.
  • the material constituting the adhesive layer can be selected from, for example, natural rubber, synthetic rubber, acrylic resin and silicone resin, polyolefin resin, polyvinyl ether resin, urethane resin, etc., but acrylic resin, Polyolefin and silicone resins are preferably used.
  • An emulsion system in which an adhesive component is dispersed in water can also be used, but an organic solvent system is preferably used from the viewpoint of transparency and reduction of the remaining adhesive.
  • Specific examples include, but are not limited to, single acrylates such as methyl acrylate, acrylic acid, ethyl acrylate, butyl acrylate, propyl acrylate, butyl methacrylate, acrylonitrile, hydroxyethyl acrylate, isononyl acrylate, and stearyl acrylate. Examples thereof include a copolymer or a copolymer.
  • Specific examples of the polyvinyl ether resin system include polyvinyl ether and polyvinyl isobutyl ether.
  • silicone dimethylpolysiloxane, fluorosilicone and the like can be used.
  • commercially available products of F5M, F6Q, and F2F manufactured by Oji Tac Co., Ltd. can also be used as acrylic.
  • the thickness of the adhesive layer is preferably from 0.01 to 5 ⁇ m, more preferably from 0.1 to 2.0 ⁇ m, from the viewpoints of adhesion, smoothness, reflectance of the reflecting material, and the like.
  • a conventionally known coating method such as a gravure coating method, a reverse coating method, a die coating method, a blade coater, a roll coater, an air knife coater, a screen coater, a bar coater, or a curtain coater can be used.
  • UV absorber In the present invention, an ultraviolet absorber can be added for the purpose of preventing deterioration due to sunlight or ultraviolet rays.
  • Each of the two or more protective layers preferably contains an ultraviolet absorber.
  • ultraviolet absorbers examples include benzophenone, benzotriazole, phenyl salicylate, and triazine.
  • benzophenone ultraviolet absorber examples include 2,4-dihydroxy-benzophenone, 2-hydroxy-4-methoxy-benzophenone, 2-hydroxy-4-n-octoxy-benzophenone, 2-hydroxy-4-dodecyloxy-benzophenone, 2- Hydroxy-4-octadecyloxy-benzophenone, 2,2'-dihydroxy-4-methoxy-benzophenone, 2,2'-dihydroxy-4,4'-dimethoxy-benzophenone, 2,2 ', 4,4'-tetra And hydroxy-benzophenone.
  • benzotriazole ultraviolet absorber examples include 2- (2′-hydroxy-5-methylphenyl) benzotriazole, 2- (2′-hydroxy-3 ′, 5′-di-t-butylphenyl) benzotriazole, 2 -(2'-hydroxy-3'-t-butyl-5'-methylphenyl) benzotriazole and the like.
  • phenyl salicylate ultraviolet absorber examples include phenylsalicylate, 2-4-di-t-butylphenyl-3,5-di-t-butyl-4-hydroxybenzoate, and the like.
  • hindered amine ultraviolet absorber examples include bis (2,2,6,6-tetramethylpiperidin-4-yl) sebacate.
  • triazine ultraviolet absorbers examples include 2,4-diphenyl-6- (2-hydroxy-4-methoxyphenyl) -1,3,5-triazine, 2,4-diphenyl-6- (2-hydroxy-4-). Ethoxyphenyl) -1,3,5-triazine, 2,4-diphenyl- (2-hydroxy-4-propoxyphenyl) -1,3,5-triazine, 2,4-diphenyl- (2-hydroxy-4-) Butoxyphenyl) -1,3,5-triazine, 2,4-diphenyl-6- (2-hydroxy-4-butoxyphenyl) -1,3,5-triazine, 2,4-diphenyl-6- (2- Hydroxy-4-hexyloxyphenyl) -1,3,5-triazine, 2,4-diphenyl-6- (2-hydroxy-4-octyloxyphenyl) -1,3,5-tria 2,4-diphenyl-6- (2-hydroxy-4-dodecyloxy
  • the ultraviolet absorber includes a compound having a function of converting the energy held by ultraviolet rays into vibrational energy in the molecule and releasing the vibrational energy as thermal energy. Furthermore, those that exhibit an effect when used in combination with an antioxidant, a colorant, or the like, or a light stabilizer that acts as a light energy conversion agent, called a quencher, can be used in combination. However, when using the above-mentioned ultraviolet absorber, it is necessary to select one in which the light absorption wavelength of the ultraviolet absorber does not overlap with the effective wavelength of the photopolymerization initiator.
  • the amount of the ultraviolet absorber used is 0.1 to 20% by mass, preferably 1 to 15% by mass, and more preferably 3 to 10% by mass. When the amount is more than 20% by mass, the adhesion is deteriorated.
  • resin base material Various conventionally known resin films can be used as the resin base material according to the present invention.
  • acrylate polyethylene terephthalate
  • the thickness of the resin base material is preferably an appropriate thickness depending on the type and purpose of the resin. For example, it is generally in the range of 10 to 300 ⁇ m. The thickness is preferably 20 to 200 ⁇ m, more preferably 30 to 100 ⁇ m.
  • the adhesive layer according to the present invention is not particularly limited as long as it has a function of improving the adhesion between the metal reflective layer and the resin base material (resin film), but is preferably made of a resin. Therefore, the adhesive layer has an adhesive property for closely adhering the resin base material (resin film) and the metal reflective layer, heat resistance that can withstand heat when the metal reflective layer is formed by a vacuum deposition method, and the metal reflective layer. Smoothness is required to bring out the high reflection performance inherent in
  • the resin used as the binder for the adhesive layer is not particularly limited as long as it satisfies the above conditions of adhesion, heat resistance, and smoothness, and polyester resin, acrylate resin, melamine resin, epoxy Resin, polyamide resin, vinyl chloride resin, vinyl chloride vinyl acetate copolymer resin, etc. can be used singly or as a mixed resin. From the point of weather resistance, acrylate resin, polyester resin and melamine resin are mixed. A resin is preferable, and a thermosetting resin in which a curing agent such as isocyanate is further mixed is more preferable.
  • an acrylate tree it is particularly preferable to use an acrylate tree.
  • Specific examples include polyacrylates and polymethacrylates such as poly (methyl methacrylate) (“PMMA”).
  • the thickness of the adhesive layer is preferably from 0.01 to 3 ⁇ m, more preferably from 0.1 to 1 ⁇ m, from the viewpoints of adhesion, smoothness, reflectance of the reflecting material, and the like.
  • a method for forming the adhesive layer conventionally known coating methods such as a gravure coating method, a reverse coating method, and a die coating method can be used.
  • the metal reflective layer according to the present invention is a layer made of a metal or the like having a function of reflecting sunlight.
  • the surface reflectance of the metal reflective layer is preferably 80% or more, more preferably 90% or more.
  • the metal reflective layer is preferably formed of a material containing any element selected from the element group consisting of Al, Ag, Cr, Cu, Ni, Ti, Mg, Rh, Pt, and Au.
  • Al or Ag is a main component from the viewpoint of reflectivity and corrosion resistance, and two or more such metal thin films may be formed.
  • a silver reflective layer mainly composed of silver it is particularly preferable to use.
  • a layer made of a metal oxide such as SiO 2 or TiO 2 may be provided in this order on the metal reflective layer to further improve the reflectance.
  • a metal reflection layer for example, a silver reflection layer
  • a wet method or a dry method can be used as a method for forming a metal reflection layer according to the present invention.
  • the wet method is a general term for a plating method, and is a method of forming a film by depositing a metal from a solution. Specific examples include silver mirror reaction.
  • the dry method is a general term for a vacuum film-forming method.
  • Specific examples include a resistance heating vacuum deposition method, an electron beam heating vacuum deposition method, an ion plating method, and an ion beam assisted vacuum deposition method.
  • sputtering method a vapor deposition method capable of a roll-to-roll method for continuously forming a film is preferably used in the present invention. That is, as a method for producing a solar power generation light reflecting film for producing the solar power generation light reflecting film of the present invention, production of an embodiment having a step of forming the metal reflecting layer (silver reflecting layer) by metal (silver) deposition. A method is preferred.
  • the thickness of the metal (silver) reflective layer is preferably 10 to 200 nm, more preferably 30 to 150 nm from the viewpoint of reflectivity and the like.
  • the metal (silver) reflective layer may be on the light incident side or on the opposite side with respect to the support.
  • the metal corrosion prevention layer is provided adjacent to the metal reflection layer, contains a corrosion inhibitor, prevents corrosion of the metal of the metal reflection layer, and contributes to prevention of scratches on the metal reflection layer. is there.
  • the resin used as the binder for the metal corrosion prevention layer can be a polyester resin, an acrylic resin, a melamine resin, an epoxy resin, or a mixture of these resins. From the viewpoint of weather resistance, a polyester resin, Acrylic resins are preferred, and more preferably thermosetting resins mixed with a curing agent such as isocyanate.
  • isocyanate various conventionally used isocyanates such as TDI (tolylene diisocyanate), XDI (xylene diisocyanate), MDI (methylene diisocyanate), and HMDI (hexamethylene diisocyanate) can be used. From the viewpoint of properties, XDI, MDI, and HMDI isocyanates are preferably used.
  • the thickness of the metal corrosion prevention layer is preferably from 0.01 to 3 ⁇ m, more preferably from 0.1 to 1 ⁇ m, from the viewpoints of adhesion, weather resistance and the like.
  • a conventionally known coating method such as a gravure coating method, a reverse coating method, or a die coating method can be used.
  • the corrosion inhibitor for the metal reflective layer used in the light reflecting film for solar power generation of the present invention is roughly classified into a corrosion inhibitor and an antioxidant having an adsorbing group for a metal.
  • corrosion refers to a phenomenon in which metal (silver) is chemically or electrochemically eroded or deteriorated by the environmental material surrounding it (see JIS Z0103-2004).
  • the light reflecting film for solar power generation of the present invention is an embodiment in which the adhesive layer contains an antioxidant and the upper adjacent layer contains a corrosion inhibitor having an adsorbing group for a metal.
  • the optimum amount of the corrosion inhibitor varies depending on the compound to be used, but generally it is preferably within the range of 0.1 to 1.0 g / m 2 .
  • Corrosion inhibitors having an adsorptive group for metals include amines and derivatives thereof, compounds having a pyrrole ring, compounds having a triazole ring, compounds having a pyrazole ring, compounds having a thiazole ring, compounds having an imidazole ring, indazole Desirably, the compound is selected from a compound having a ring, copper chelate compounds, thioureas, a compound having a mercapto group, at least one naphthalene-based compound, or a mixture thereof.
  • amines and derivatives thereof include ethylamine, laurylamine, tri-n-butylamine, O-toluidine, diphenylamine, ethylenediamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, monoethanolamine, diethanolamine, triethanolamine, 2N- Dimethylethanolamine, 2-amino-2-methyl-1,3-propanediol, acetamide, acrylamide, benzamide, p-ethoxychrysoidine, dicyclohexylammonium nitrite, dicyclohexylammonium salicylate, monoethanolamine benzoate, dicyclohexylammonium benzoate, diisopropyl Ammonium benzoate, diisopropylammonium nitrite Cyclohexylamine carbamate, nitronaphthalene nitrite, cyclohexylamine benzoate, dicyclohexylammonium
  • Examples of compounds having a pyrrole ring include N-butyl-2,5-dimethylpyrrole, N-phenyl-2,5-dimethylpyrrole, N-phenyl-3-formyl-2,5-dimethylpyrrole, and N-phenyl-3. , 4-diformyl-2,5-dimethylpyrrole, etc., or a mixture thereof.
  • Examples of the compound having a triazole ring include 1,2,3-triazole, 1,2,4-triazole, 3-mercapto-1,2,4-triazole, 3-hydroxy-1,2,4-triazole, 3- Methyl-1,2,4-triazole, 1-methyl-1,2,4-triazole, 1-methyl-3-mercapto-1,2,4-triazole, 4-methyl-1,2,3-triazole, Benzotriazole, tolyltriazole, 1-hydroxybenzotriazole, 4,5,6,7-tetrahydrotriazole, 3-amino-1,2,4-triazole, 3-amino-5-methyl-1,2,4- Triazole, carboxybenzotriazole, 2- (2'-hydroxy-5'-methylphenyl) benzotriazole, 2- (2'-hydroxy) -5'-tert-butylphenyl) benzotriazole, 2- (2'-hydroxy-3 ', 5'-di-tert-butylphenyl) benzotriazole
  • Examples of the compound having a pyrazole ring include pyrazole, pyrazoline, pyrazolone, pyrazolidine, pyrazolidone, 3,5-dimethylpyrazole, 3-methyl-5-hydroxypyrazole, 4-aminopyrazole, and a mixture thereof.
  • Examples of the compound having a thiazole ring include thiazole, thiazoline, thiazolone, thiazolidine, thiazolidone, isothiazole, benzothiazole, 2-N, N-diethylthiobenzothiazole, P-dimethylaminobenzallodanine, 2-mercaptobenzothiazole, etc. Or a mixture thereof.
  • Compounds having an imidazole ring include imidazole, histidine, 2-heptadecylimidazole, 2-methylimidazole, 2-ethyl-4-methylimidazole, 2-phenylimidazole, 2-undecylimidazole, 1-benzyl-2-methyl.
  • Imidazole 2-phenyl-4-methylimidazole, 1-cyanoethyl-2-methylimidazole, 1-cyanoethyl-2-phenylimidazole, 1-cyanoethyl-2-ethyl-4-methylimidazole, 1-cyanoethyl-2-undecyl Imidazole, 2-phenyl-4-methyl-5-hydromethylimidazole, 2-phenyl-4,5-dihydroxymethylimidazole, 4-formylimidazole, 2-methyl-4-formylimidazole, 2-phenyl-4 Formylimidazole, 4-methyl-5-formylimidazole, 2-ethyl-4-methyl-5-formylimidazole, 2-phenyl-4-methyl-4-formylimidazole, 2-mercaptobenzimidazole, etc., or These mixtures are mentioned.
  • Examples of the compound having an indazole ring include 4-chloroindazole, 4-nitroindazole, 5-nitroindazole, 4-chloro-5-nitroindazole, and a mixture thereof.
  • copper chelate compounds include acetylacetone copper, ethylenediamine copper, phthalocyanine copper, ethylenediaminetetraacetate copper, hydroxyquinoline copper, and the like, or a mixture thereof.
  • thioureas examples include thiourea, guanylthiourea, and the like, or a mixture thereof.
  • mercaptoacetic acid thiophenol, 1,2-ethanediol, 3-mercapto-1,2,4-triazole, 1-methyl-3-mercapto
  • naphthalene-based compounds examples include thionalide.
  • An antioxidant can also be used as the corrosion inhibitor for the metal reflective layer used in the light reflecting film for solar power generation of the present invention.
  • the antioxidant it is preferable to use a phenol-based antioxidant, a thiol-based antioxidant, and a phosphite-based antioxidant.
  • phenolic antioxidants examples include 1,1,3-tris (2-methyl-4-hydroxy-5-tert-butylphenyl) butane, 2,2′-methylenebis (4-ethyl-6-t- Butylphenol), tetrakis- [methylene-3- (3 ', 5'-di-t-butyl-4'-hydroxyphenyl) propionate] methane, 2,6-di-t-butyl-p-cresol, 4,4 '-Thiobis (3-methyl-6-t-butylphenol), 4,4'-butylidenebis (3-methyl-6-t-butylphenol), 1,3,5-tris (3', 5'-di-t -Butyl-4'-hydroxybenzyl) -S-triazine-2,4,6- (1H, 3H, 5H) trione, stearyl- ⁇ - (3,5-di-t-butyl-4-hydroxyphenyl) propi , Triethylene glycol bis [3- (3-
  • thiol-based antioxidant examples include distearyl-3,3′-thiodipropionate, pentaerythritol-tetrakis- ( ⁇ -lauryl-thiopropionate), and the like.
  • phosphite antioxidant examples include tris (2,4-di-t-butylphenyl) phosphite, distearyl pentaerythritol diphosphite, di (2,6-di-t-butylphenyl) pentaerythritol.
  • Diphosphite bis- (2,6-di-t-butyl-4-methylphenyl) -pentaerythritol diphosphite, tetrakis (2,4-di-t-butylphenyl) 4,4'-biphenylene-diphosphonite 2,2'-methylenebis (4,6-di-t-butylphenyl) octyl phosphite and the like.
  • the above antioxidant and the following light stabilizer can be used in combination.
  • hindered amine light stabilizer examples include bis (2,2,6,6-tetramethyl-4-piperidyl) sebacate, bis (1,2,2,6,6-pentamethyl-4-piperidyl) sebacate, Bis (1,2,2,6,6-pentamethyl-4-piperidyl) -2- (3,5-di-t-butyl-4-hydroxybenzyl) -2-n-butylmalonate, 1-methyl- 8- (1,2,2,6,6-pentamethyl-4-piperidyl) -sebacate, 1- [2- [3- (3,5-di-t-butyl-4-hydroxyphenyl) propionyloxy] ethyl ] -4- [3- (3,5-di-t-butyl-4-hydroxyphenyl) propionyloxy] -2,2,6,6-tetramethylpiperidine, 4-benzoyloxy-2,2,6 6-Tetrame Lupiperidine, tetrakis (2,2,6,6
  • [2,2′-thiobis (4-t-octylphenolate)]-2-ethylhexylamine nickel (II), nickel complex-3,5-di-t-butyl-4 as a nickel-based UV stabilizer -Hydroxybenzyl phosphate monoethylate, nickel dibutyl dithiocarbamate, etc. can also be used.
  • a hindered amine light stabilizer containing only a tertiary amine is preferable.
  • bis (1,2,2,6,6-pentamethyl-4-piperidyl) is preferable.
  • a condensate of 1,2,2,6,6-pentamethyl-4-piperidinol / tridecyl alcohol and 1,2,3,4-butanetetracarboxylic acid is preferred.
  • Gas barrier layer It is also preferable to provide a gas barrier layer in the present invention. This is to prevent deterioration of the humidity, in particular, deterioration of the resin base material and various functional elements protected by the resin base material due to high humidity.
  • the moisture barrier property of the gas barrier layer is preferably adjusted so that the water vapor permeability at 40 ° C. and 90% RH is preferably 1 g / m 2 ⁇ day / ⁇ m or less.
  • the gas barrier layer according to the present invention is not particularly limited in its formation method, but an inorganic film layer may be formed by vapor deposition. After coating the ceramic precursor of the inorganic oxide film, the coating film is heated and / or Alternatively, it is also preferable to form an inorganic oxide film by ultraviolet irradiation.
  • the gas barrier layer according to the present invention can be formed by applying a general heating method after applying a ceramic precursor that forms an inorganic oxide film by heating, but is preferably formed by local heating.
  • the ceramic precursor is preferably a sol-like organometallic compound or polysilazane.
  • the protective layer of the present invention can preferably contain an inorganic oxide. Silicon (Si), aluminum (Al), zirconium (Zr), titanium (Ti), tantalum (Ta), zinc (Zn), barium (Ba), indium (In), tin (Sn), niobium (Nb), etc. It is characterized by being an oxide of the element.
  • silicon oxide aluminum oxide, zirconium oxide and the like.
  • silicon oxide is preferable, and particles having an average particle diameter of less than 50 nm are preferably used.
  • the total thickness of the light reflecting film for solar power generation according to the present invention is preferably from 75 to 250 ⁇ m, more preferably from 90 to 230 ⁇ m, still more preferably from 100 to 100 ⁇ m, from the viewpoints of mirror deflection prevention, regular reflectance, handling properties, and the like. 220 ⁇ m.
  • the light reflecting film for solar power generation of the present invention can be preferably used for the purpose of concentrating sunlight.
  • the light reflecting film for solar power generation can be used alone as a solar light collecting mirror, but more preferably, the adhesive coated on the surface of the resin base opposite to the side having the metal reflective layer across the resin base.
  • the light reflecting film for solar power generation is stuck on another base material, particularly on a metal base material, through a layer, and used as a solar power generation reflecting device.
  • the reflecting device When used as a solar power generation reflecting device, the reflecting device is shaped like a bowl (semi-cylindrical), and a cylindrical member having fluid inside is provided at the center of the semicircle, and sunlight is condensed on the cylindrical member.
  • the form for example, trough type solar thermal power generation
  • flat reflectors were installed at multiple locations, and the sunlight reflected by each reflector was collected on one reflector (central reflector) and reflected by the reflector.
  • the form (for example, tower type solar power generation) which generates electric power by converting thermal energy in a power generation part is also mentioned as one form.
  • the reflection device mirror structure of the heliostat
  • the light reflecting film for solar power generation of the present invention is particularly preferably used.
  • the adhesive layer is not particularly limited, and for example, any of a dry laminating agent, a wet laminating agent, an adhesive, a heat seal agent, a hot melt agent, and the like is used.
  • polyester resin urethane resin, polyvinyl acetate resin, acrylic resin, nitrile rubber and the like are used.
  • the laminating method is not particularly limited, and for example, it is preferable to carry out the roll method continuously from the viewpoint of economy and productivity.
  • the thickness of the pressure-sensitive adhesive layer is usually preferably in the range of about 1 to 50 ⁇ m from the viewpoint of the pressure-sensitive adhesive effect, the drying speed, and the like.
  • the other base material to be bonded to the solar power generation light reflecting film of the present invention may be any material that can impart the protective property of the metal reflective layer, for example, an acrylic film or sheet, polycarbonate Film or sheet, polyarylate film or sheet, polyethylene naphthalate film or sheet, polyethylene terephthalate film or sheet, plastic film or sheet such as fluorine film, or resin film kneaded with titanium oxide, silica, aluminum powder, copper powder, etc.
  • a sheet or a resin film or sheet coated with a resin kneaded with these or subjected to surface processing such as metal deposition is used.
  • the thickness of the laminated film or sheet is not particularly limited but is preferably in the range of 12 to 250 ⁇ m.
  • these other base materials may be bonded together after being provided with recesses or protrusions before being bonded to the solar power generation light reflecting film of the present invention, and after bonding, they are formed to have recesses or protrusions.
  • the bonding and the molding so as to have a concave portion or a convex portion may be performed at the same time.
  • the metal substrate of the solar collector mirror according to the present invention includes a steel plate, a copper plate, an aluminum plate, an aluminum plated steel plate, an aluminum alloy plated steel plate, a copper plated steel plate, a tin plated steel plate, a chrome plated steel plate, a stainless steel plate, etc.
  • a metal material having a high rate can be used.
  • a plated steel plate In the present invention, it is particularly preferable to use a plated steel plate, a stainless steel plate, an aluminum plate or the like having good corrosion resistance.
  • thermoplastic polymethyl methacrylate resin film weight average molecular weight 100,000, number average molecular weight 50000; hereinafter simply referred to as “acrylic film”
  • an ultraviolet absorber (Comparative Compound 1, TINUVIN 928, manufactured by BASF Japan Ltd.) is acrylic.
  • a resin base film (film A) that was used as a first protective layer having a thickness of 50 ⁇ m was prepared by containing 5% by mass in the film.
  • F5M manufactured by Oji Tac Co., Ltd. was applied in a thickness of 1 ⁇ m as an easily peelable adhesive layer, and film A serving as a second protective layer was laminated and adhered to produce film B.
  • a third protective layer was installed on the film B in the same manner as the second protective layer to produce a film C.
  • polyester resin Polyethylene SP-181, manufactured by Nippon Synthetic Chemical Co., Ltd.
  • melamine resin Super Becamine J-820, manufactured by DIC
  • TDI isocyanate (2,4-tolylene diisocyanate
  • HDMI isocyanate (1,6-hexamethylene diisocyanate) was adjusted to a resin solid content ratio of 20: 1: 1: 2 and a solid content concentration of 10% by mass, and an antioxidant (1,2,2′-methylenebis) was added.
  • the film mirror 3 of the present invention was prepared in the same manner as the film mirror 2 except that 3% by mass of silica oxide particles having an average particle diameter of 20 nm were contained in each protective layer in the production of the film mirror 2.
  • the film mirrors 1 to 5 prepared above are pasted on a stainless steel (SUS304) plate with a thickness of 0.1 mm and a length of 4 cm and a width of 5 cm, with an acrylic film side as the top and an adhesive layer with a thickness of 3 ⁇ m. Reflector devices 1 to 5 for solar thermal power generation were produced.
  • SUS304 stainless steel
  • Table 1 shows the contents of film mirrors 1 to 5 (Examples 1 to 4 and Comparative Example 5).
  • Test A Moisture-resistant light test
  • I-Super UV tester manufactured by Iwasaki Electric.
  • the regular reflectance was measured by the same method as the light reflectance measurement.
  • the reduction rate of the regular reflectance of the film mirror before and after the forced deterioration test was calculated and evaluated according to the following criteria. After the evaluation, the product of the present invention from which the first protective layer can be peeled off is peeled off from the first protective layer and evaluated for regular reflectance. After that, the second test A was conducted.
  • Spraying was performed for 1 minute, and a test for scratching the film resurface was conducted. After the test, the regular reflectance was measured and evaluated according to the following criteria. After the evaluation, the product of the present invention from which the first protective layer can be peeled off is peeled off from the first protective layer and evaluated for regular reflectance. After that, the second test B was conducted. After the evaluation, the product of the present invention from which the second protective layer can be peeled is peeled off the second protective layer and evaluated for regular reflectance. Thereafter, a third test B was performed and evaluated in the same manner.
  • the rate of decrease in regular reflectance is less than 5% 4: The rate of decrease in regular reflectance is 5% or more and less than 10% 3: The rate of decrease in regular reflectance is 10% or more but less than 15% 2: The rate of decrease in regular reflectance 15% or more and less than 20% 1: The rate of decrease in regular reflectance is 20% or more. Tables 2 and 3 show the evaluation results.
  • the film mirror using the light reflecting film for solar power generation according to the present invention can maintain the regular reflectance at a high level for a long time. It can be seen that it can also be used for a mirror structure of a tower solar power generation heliostat requiring higher specular reflectance.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Thermal Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Laminated Bodies (AREA)
  • Photovoltaic Devices (AREA)

Abstract

La présente invention se rapporte à un film réfléchissant la lumière permettant une production d'énergie solaire thermique, qui présente une bonne réflexion spéculaire de la lumière solaire et qui ne peut pas diminuer la réflexion spéculaire en raison de la détérioration d'une couche de protection, ou analogue. Le film réfléchissant la lumière permettant une production d'énergie solaire thermique est léger, présente une flexibilité, une excellente résistance à la lumière et une excellente résistance aux conditions météorologiques, et peut être produit en masse à un coût de production réduit tout en ayant une superficie accrue. La présente invention se rapporte également à un procédé permettant de fabriquer le film réfléchissant la lumière permettant une production d'énergie solaire thermique et à un dispositif de réflexion permettant une production d'énergie solaire thermique à l'aide du film réfléchissant la lumière permettant une production d'énergie solaire thermique. Le film réfléchissant la lumière permettant une production d'énergie solaire thermique comprend, comme couches constituantes sur une base en résine, une couche adhésive, une couche de réflexion en métal et deux couches de protection ou plus qui sont disposées plus près de la source de lumière que la couche de réflexion en métal, et est caractérisé en ce qu'au moins une des couches de protection peut être retirée.
PCT/JP2011/050255 2010-02-02 2011-01-11 Film réfléchissant la lumière permettant une production d'énergie solaire thermique, procédé de fabrication de ce dernier et dispositif de réflexion permettant une production d'énergie solaire thermique à l'aide de ce dernier WO2011096248A1 (fr)

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JP2010-021057 2010-08-31

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2796904A4 (fr) * 2011-12-21 2015-08-19 Konica Minolta Inc Miroir à film pour réfléchir la lumière solaire et dispositif réfléchissant pour produire de l'énergie solaire
JP2015206024A (ja) * 2014-04-08 2015-11-19 三菱レイヨン株式会社 アクリル系フィルム、積層フィルム及び積層シート
WO2016167149A1 (fr) * 2015-04-13 2016-10-20 三菱樹脂株式会社 Film réfléchissant, et dispositif d'affichage à cristaux liquides, dispositif d'éclairage, et produit décoratif le comprenant

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JPS61154942A (ja) * 1984-12-24 1986-07-14 ミネソタ　マイニング　アンド　マニユフアクチユアリング　コンパニー 耐腐食性反射鏡
JP2002154179A (ja) * 2000-11-21 2002-05-28 Kobe Steel Ltd アルミニウム合金薄板材及びそれを用いたヘリオスタット用凹面反射鏡並びにその製造方法
JP2004286943A (ja) * 2003-03-20 2004-10-14 Ricoh Co Ltd 樹脂反射鏡およびその製造方法
JP2005003137A (ja) * 2003-06-13 2005-01-06 Hitachi Metals Ltd 多層樹脂管およびその製造方法
JP2006326971A (ja) * 2005-05-25 2006-12-07 Toray Ind Inc 耐候性樹脂フィルム

Patent Citations (5)

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Publication number Priority date Publication date Assignee Title
JPS61154942A (ja) * 1984-12-24 1986-07-14 ミネソタ　マイニング　アンド　マニユフアクチユアリング　コンパニー 耐腐食性反射鏡
JP2002154179A (ja) * 2000-11-21 2002-05-28 Kobe Steel Ltd アルミニウム合金薄板材及びそれを用いたヘリオスタット用凹面反射鏡並びにその製造方法
JP2004286943A (ja) * 2003-03-20 2004-10-14 Ricoh Co Ltd 樹脂反射鏡およびその製造方法
JP2005003137A (ja) * 2003-06-13 2005-01-06 Hitachi Metals Ltd 多層樹脂管およびその製造方法
JP2006326971A (ja) * 2005-05-25 2006-12-07 Toray Ind Inc 耐候性樹脂フィルム

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2796904A4 (fr) * 2011-12-21 2015-08-19 Konica Minolta Inc Miroir à film pour réfléchir la lumière solaire et dispositif réfléchissant pour produire de l'énergie solaire
JP2015206024A (ja) * 2014-04-08 2015-11-19 三菱レイヨン株式会社 アクリル系フィルム、積層フィルム及び積層シート
WO2016167149A1 (fr) * 2015-04-13 2016-10-20 三菱樹脂株式会社 Film réfléchissant, et dispositif d'affichage à cristaux liquides, dispositif d'éclairage, et produit décoratif le comprenant

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