WO2014061497A1 - Miroir à film et appareil réfléchissant pour génération d'énergie thermique solaire - Google Patents

Miroir à film et appareil réfléchissant pour génération d'énergie thermique solaire Download PDF

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Publication number
WO2014061497A1
WO2014061497A1 PCT/JP2013/077274 JP2013077274W WO2014061497A1 WO 2014061497 A1 WO2014061497 A1 WO 2014061497A1 JP 2013077274 W JP2013077274 W JP 2013077274W WO 2014061497 A1 WO2014061497 A1 WO 2014061497A1
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Prior art keywords
layer
resin
metal
film
silver
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PCT/JP2013/077274
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English (en)
Japanese (ja)
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鈴木　利継
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コニカミノルタ株式会社
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Priority to JP2014542062A priority Critical patent/JPWO2014061497A1/ja
Publication of WO2014061497A1 publication Critical patent/WO2014061497A1/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
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal 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
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • 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
    • F24S23/82—Arrangements for concentrating solar-rays for solar heat collectors with reflectors characterised by the material or the construction of the reflector
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/08—Mirrors
    • G02B5/0816—Multilayer mirrors, i.e. having two or more reflecting layers
    • G02B5/085—Multilayer mirrors, i.e. having two or more reflecting layers at least one of the reflecting layers comprising metal
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/08—Mirrors
    • G02B5/0816—Multilayer mirrors, i.e. having two or more reflecting layers
    • G02B5/085—Multilayer mirrors, i.e. having two or more reflecting layers at least one of the reflecting layers comprising metal
    • G02B5/0858—Multilayer mirrors, i.e. having two or more reflecting layers at least one of the reflecting layers comprising metal the reflecting layers comprising a single metallic layer with one or more dielectric layers
    • G02B5/0866—Multilayer mirrors, i.e. having two or more reflecting layers at least one of the reflecting layers comprising metal the reflecting layers comprising a single metallic layer with one or more dielectric layers incorporating one or more organic, e.g. polymeric layers
    • 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
    • B32B2307/416—Reflective
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
    • 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
    • B32B2551/00—Optical elements
    • B32B2551/08—Mirrors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S25/00—Arrangement of stationary mountings or supports for solar heat collector modules
    • F24S25/60—Fixation means, e.g. fasteners, specially adapted for supporting solar heat collector modules
    • F24S2025/601—Fixation means, e.g. fasteners, specially adapted for supporting solar heat collector modules by bonding, e.g. by using adhesives
    • 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 film mirror and a solar power generation reflector.
  • Solar energy can be considered as one of the stable and abundant natural energies as alternative energy for fossil fuel.
  • the vast desert spreads near the equator which is called the world's sun belt, and the solar energy that falls down here is truly inexhaustible.
  • energy of as much as 7,000 GW can be obtained using only a few percent of the desert that extends to the southeastern United States.
  • using only a few percent of the Arabian peninsula and the deserts of North Africa can cover all the energy used by all centuries.
  • the condensing device Since the condensing device is exposed to ultraviolet rays, heat, wind and rain, sandstorms, etc. by sunlight, conventionally, a glass mirror has been used for the concentrating device. Glass mirrors are highly durable to the environment, but they are damaged during transportation and heavy, so that there is a problem that the construction cost of the plant is increased due to the strength of the mount on which the mirrors are installed.
  • Patent Document 1 and Patent Document 2 In order to solve the above problem, it has been considered to replace a glass mirror with a resin mirror (for example, Patent Document 1 and Patent Document 2).
  • a resin mirror for example, Patent Document 1 and Patent Document 2.
  • Oxygen, water vapor, hydrogen sulfide, etc. pass through the resin layer and corrode silver, and the resin layer deteriorates due to ultraviolet rays, causing discoloration and film peeling. Application was difficult.
  • Patent Document 3 and Patent Document 4 resin mirrors using an acrylic film that blocks ultraviolet rays and has excellent light resistance have been proposed (for example, Patent Document 3 and Patent Document 4).
  • the layer structure proposed in Patent Document 3 and Patent Document 4 since the pressure-sensitive adhesive layer easily transmits various substances, contaminants invade from the interface between the pressure-sensitive adhesive layer and the silver reflective layer, and silver corrosion occurs. There were problems such as easy progress. In particular, corrosion of the end face obtained by cutting the mirror is remarkable, and it has been desired to prevent corrosion of the cut end face.
  • an object of the present invention is to provide a film mirror and a solar power generation reflecting device having high corrosion resistance even at an end face after cutting (cut end face; cut end).
  • a film mirror in which a metal reflective layer is provided on a resin film-like support, having a pressure-sensitive adhesive layer on either the light incident side or the back side of the reflective layer, and the pressure-sensitive adhesive layer A film mirror comprising a corrosion inhibitor of the same kind of metal as the metal of the reflective layer.
  • the reflective layer has a pressure-sensitive adhesive layer on both the light incident side and the back side thereof, and contains a silver corrosion inhibitor in both or one side of the pressure-sensitive adhesive layer.
  • metal corrosion inhibitor is a silver corrosion inhibitor and is at least one of a mercapto compound and a benzotriazole compound.
  • a reflector for solar power generation wherein the film mirror according to any one of 1 to 6 is formed by being attached to a support base material.
  • a film mirror 20 for solar power generation according to an embodiment of the present invention includes, in order from the light incident side, an acrylic layer 5, an adhesive layer or an adhesive layer 4, a resin coating layer 8, a metal (silver) reflective layer 3, and a resin. It has a film-like support 1 and an adhesive layer 6. In addition, you may interpose another layer between these layers, and each layer may adjoin. Further, another layer may be provided on the acrylic layer 5 or the pressure-sensitive adhesive layer 6.
  • a gas barrier layer (not shown) may be provided somewhere on the light incident side of the metal (silver) reflective layer 3.
  • a transparent hard coat layer (not shown) may be provided on the light incident side of the acrylic layer 5.
  • An anchor layer 2 may be provided between the metal (silver) reflective layer 3 and the resin film-like support 1. Moreover, you may provide the peeling layer 7 which covers the adhesive layer 6.
  • the thickness of the entire film mirror according to the present invention is preferably 80 to 300 ⁇ m, more preferably 80 to 200 ⁇ m, and still more preferably 80 to 170 ⁇ m from the viewpoints of prevention of bending, regular reflectance, handling properties, and the like.
  • the adhesive is cured after bonding, whereas the adhesive keeps the viscosity after bonding, so when the film mirror is cut with a cutter or scissors (a cutting device or a cutting device at the time of mass production), Part of the adhesive moves to the cut surface, covers the metal reflective layer of the cut surface, and can prevent the metal reflective layer from being exposed.
  • a corrosion inhibitor for preventing corrosion of the metal reflection layer in the pressure-sensitive adhesive layer the effect can be exhibited particularly remarkably.
  • Acrylic layer> The purpose of providing the acrylic layer 5 is to absorb and block ultraviolet rays to prevent deterioration and discoloration of the lower resin layer (resin coat layer 8, adhesive layer 4, resin film support 1 and the like), and film peeling. It is to provide excellent light resistance and weather resistance. Therefore, the acrylic layer 5 contains an ultraviolet absorber.
  • the acrylic layer 5 may contain an antioxidant. Since the acrylic layer 5 is hard, it may contain plasticizer fine particles in order to obtain an acrylic layer 5 that is soft and difficult to break. Preferable examples of the plasticizer fine particles include butyl rubber and butyl acrylate fine particles.
  • the thickness of the acrylic layer 5 is preferably 20 to 150 ⁇ m. More preferably, it is 40 to 100 ⁇ m.
  • the thickness of the acrylic layer 5 is 20 ⁇ m or more, an appropriate amount of the ultraviolet absorber is contained, so that the ultraviolet blocking function to the lower resin layer can be sufficiently exhibited. If the thickness of the acrylic layer 5 is 150 ⁇ m or less, the flexibility can be sufficiently maintained, so that cracks and cracks can be effectively prevented.
  • the acrylic layer 5 is preferably composed of a methacrylic resin as a base resin.
  • the methacrylic resin is a polymer mainly composed of a methacrylic acid ester, and may be a homopolymer of a methacrylic acid ester.
  • the methacrylic acid ester is 50% by mass or more and the other monomer is 50% by mass or less.
  • a copolymer may also be used.
  • the methacrylic acid ester an alkyl ester of methacrylic acid is usually used.
  • a particularly preferred methacrylic resin is polymethyl methacrylate resin (PMMA).
  • the preferred monomer composition of the methacrylic resin is 50 to 100% by weight of methacrylic acid ester, 0 to 50% by weight of acrylic acid ester, and 0 to 49% by weight of other monomers based on the total monomers. More preferably, methacrylic acid ester is 50 to 99.9% by mass, acrylic acid ester is 0.1 to 50% by mass, and other monomers are 0 to 49% by mass.
  • examples of the alkyl methacrylate include methyl methacrylate, ethyl methacrylate, butyl methacrylate, 2-ethylhexyl methacrylate and the like, and the alkyl group usually has 1 to 8 carbon atoms, preferably 1 to 4 carbon atoms. It is. Of these, methyl methacrylate is preferably used.
  • alkyl acrylates include methyl acrylate, ethyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, and the like.
  • the alkyl group usually has 1 to 8 carbon atoms, preferably 1 to 4 carbon atoms. is there.
  • the monomer other than alkyl methacrylate and alkyl acrylate may be a monofunctional monomer, that is, a compound having one polymerizable carbon-carbon double bond in the molecule, or a polyfunctional monofunctional monomer. Although it may be a monomer, that is, a compound having at least two polymerizable carbon-carbon double bonds in the molecule, a monofunctional monomer is preferably used.
  • the monofunctional monomer include aromatic alkenyl compounds such as styrene, ⁇ -methylstyrene, and vinyl toluene, and alkenyl cyan compounds such as acrylonitrile and methacrylonitrile.
  • polyfunctional monomers examples include polyunsaturated carboxylic acid esters of polyhydric alcohols such as ethylene glycol dimethacrylate, butanediol dimethacrylate, trimethylolpropane triacrylate, allyl acrylate, allyl methacrylate, and cinnamon.
  • Alkenyl esters of unsaturated carboxylic acids such as allyl acids
  • polyalkenyl esters of polybasic acids such as diallyl phthalate, diallyl maleate, triallyl cyanurate, triallyl isocyanurate
  • aromatic polyalkenyl compounds such as divinylbenzene, etc.
  • alkyl methacrylate alkyl methacrylate
  • alkyl acrylate and monomers other than these, respectively, you may use those 2 or more types as needed.
  • the glass transition temperature of the methacrylic resin is preferably 40 ° C. or higher, more preferably 60 ° C. or higher, from the viewpoint of heat resistance of the film. This glass transition temperature can be appropriately set by adjusting the type of monomer and the ratio thereof.
  • the methacrylic resin can be prepared by polymerizing the monomer component by a method such as suspension polymerization, emulsion polymerization, or bulk polymerization. At that time, in order to obtain a suitable glass transition temperature or to obtain a viscosity showing a formability to a suitable film, it is preferable to use a chain transfer agent during the polymerization.
  • the amount of the chain transfer agent may be appropriately determined according to the type of monomer and the ratio thereof.
  • UV absorber Details of the ultraviolet absorber contained in the acrylic layer 5 will be described below.
  • the purpose of adding the ultraviolet absorber is to give the acrylic layer 5 a function of absorbing and blocking ultraviolet rays.
  • an ultraviolet absorber As an organic type, a benzophenone type, a benzotriazole type, a phenyl salicylate type, a triazine type, a hindered amine type, a benzoate type, etc. are mentioned, Moreover, titanium oxide, zinc oxide, Examples include cerium oxide and iron oxide.
  • a high molecular weight ultraviolet absorber having a weight average molecular weight of 1000 or more. The weight average molecular weight is preferably 1000 or more and 3000 or less.
  • benzophenone ultraviolet absorbers 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' -Tetrahydroxy-benzophenone and the like.
  • benzotriazole ultraviolet absorbers 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, 2,2′-methylenebis [6- (2H-benzotriazol-2-yl) -4- (1, 1,3,3-tetramethylbutyl) phenol] (molecular weight 659; examples of commercially available products are LA31 from ADEKA Corporation), 2- (2H-benzotriazol-2-yl) -4,6-bis (1- Methyl-1-phenylethyl) phenol (molecular weight 447.6; examples of commercially available products include Tinuvin 234 from Ciba Specialty Chemicals)
  • phenyl salicylate UV absorber examples include phenylsulcylate, 2-4-di-t-butylphenyl-3,5-di-t-butyl-4-hydroxybenzoate, and the like.
  • hindered amine ultraviolet absorbers 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-to Azine, 2,4-diphenyl-6- (2-hydroxy-4-dodecyloxyphen
  • benzoate-based ultraviolet absorber examples include 2,4-di-tert-butylphenyl-3,5-di-tert-butyl-4-hydroxybenzoate (molecular weight 438.7; examples of commercially available products) Sumisorb 400) from Sumitomo Chemical Co., Ltd.
  • the ultraviolet absorber 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 heat energy or the like can be used. Furthermore, those that exhibit an effect when used in combination with an antioxidant or a colorant, or light stabilizers acting as a light energy conversion agent, called quenchers, can be used in combination.
  • quenchers light stabilizers acting as a light energy conversion agent
  • each of the above ultraviolet absorbers may be used in combination of two or more thereof as necessary.
  • an ultraviolet absorber other than the above-described ultraviolet absorber for example, a salicylic acid derivative, a substituted acrylonitrile, a nickel complex, or the like can be contained.
  • the content of the ultraviolet absorber in the acrylic layer is preferably 0.1 to 20% by mass, more preferably 1 to 15% by mass, and further preferably 3 to 10% by mass.
  • the content of the ultraviolet absorber in the acrylic layer is 0.17 to 2.28 g / m 2 per unit area of the film, more preferably 0.4 to 2.2. 28 g / m 2 .
  • the acrylic layer 5 may contain an antioxidant. Examples of preferred antioxidants are listed below.
  • antioxidant it is preferable to use organic antioxidants such as phenolic antioxidants, hindered amine antioxidants, thiol antioxidants, and phosphite antioxidants.
  • phenolic antioxidants 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) propionate
  • hindered amine antioxidant 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- Tetramethi Piperidine, tetrakis (2,2,6,6-tetramethyl-4-
  • the hindered amine-based antioxidant is preferably a hindered amine-based antioxidant containing only a tertiary amine, specifically, bis (1,2,2,6,6-pentamethyl-4-piperidyl) sebacate.
  • a condensate of 2,2,6,6-pentamethyl-4-piperidinol / tridecyl alcohol and 1,2,3,4-butanetetracarboxylic acid is preferred.
  • 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- Examples thereof include diphosphonite and 2,2′-methylenebis (4,6-di-t-butylphenyl) octyl phosphite.
  • the above antioxidant and the following light stabilizer can be used in combination.
  • a nickel-based ultraviolet stabilizer can be used.
  • the nickel-based ultraviolet stabilizer [2,2′-thiobis (4-t-octylphenolate)]-2-ethylhexylamine nickel ( II), nickel complex-3,5-di-t-butyl-4-hydroxybenzyl phosphate monoethylate, nickel dibutyl dithiocarbamate and the like.
  • the content of the antioxidant in the acrylic layer 5 is preferably 0.1 to 10% by mass, more preferably 0.5 to 3% by mass. When the content of the antioxidant in the acrylic layer 5 is within the above range, an excellent antioxidant function can be exhibited without impairing the function (the purpose) required for the acrylic layer 5.
  • the content of the light stabilizer in the acrylic layer 5 is preferably 0.1 to 10% by mass, more preferably 0.5 to 3% by mass.
  • the content of the light stabilizer in the acrylic layer 5 is within the above range, an excellent light stabilizing function can be effectively expressed without impairing the function (the purpose) required of the acrylic layer 5. .
  • the adhesive layer 4 is not particularly limited as long as it has a function of improving the adhesion between the layers. Adhesion or adhesion may be used. Preferably, it is a layer for bonding the acrylic layer 5 and the resin coat layer 8 together.
  • the adhesive layer 4 has an adhesion property that allows the layers to adhere to each other, heat resistance that can withstand heat when the metal (silver) reflective layer 3 is formed by a vacuum deposition method, and the metal (especially silver) reflective layer 3 is originally used. It is preferable to have smoothness to bring out the high reflection performance.
  • an adhesive layer containing a metal corrosion inhibitor of the same type as the metal of the reflective layer 3 is provided on the light incident side of the metal reflective layer 3, between the acrylic layer 5 and the metal (silver) reflective layer 3. It is desirable to provide an adhesive layer.
  • the adhesive layer 4 may be used as a pressure-sensitive adhesive layer as in the examples, or a new pressure-sensitive adhesive layer may be provided between the resin coat layer 8 and the metal (silver) reflective layer 3. Good.
  • the adhesive layer 4 is used as a pressure-sensitive adhesive layer containing the same type of metal corrosion inhibitor as the metal of the reflective layer 3, the same kind of metal (silver) as the metal of the reflective layer 3 is used for the adhesive layer 4 as well. Contains corrosion inhibitors.
  • Such a metal (silver) corrosion inhibitor will be described in detail in the explanation section of the resin coat layer 8 to be described later.
  • the adhesive layer 4 is used as an adhesive layer containing the same type of metal corrosion inhibitor as the metal of the reflective layer 3, the metal (silver) of the adhesive layer provided at the position of the adhesive layer 4.
  • the corrosion inhibitor covers the cut surface of the metal (silver) reflective layer 3 at the time of cutting (cutting), prevents corrosion from the cut surface, and oxygen, water vapor, hydrogen sulfide through the resin layer (acrylic layer 5). Or the like can be transmitted, and the metal (silver) of the reflective layer 3 can be corroded.
  • the metal (silver) corrosion inhibitor of the resin coat layer 8 close to (adjacent to) the metal (silver) reflective layer 3 is mainly permeable to oxygen, water vapor, hydrogen sulfide, etc. through the resin layer (acrylic layer 5). And it can contribute to solving the problem of the prior art that the metal (silver) of the reflective layer 3 is corroded.
  • an adhesive layer containing a metal corrosion inhibitor is provided on the side (for example, when the cutter is inserted from the light incident side) at the time of cutting (cutting). Is desirable.
  • the adhesive containing the metal corrosion inhibitor protrudes due to the pressing force for fixing the film mirror, and the adhesive containing the metal corrosion inhibitor tends to cover the end face of the metal reflection layer on the cut section. It is. However, even if the pressure-sensitive adhesive layer containing the metal corrosion inhibitor is provided on the side opposite to the side where the cutting blade is inserted at the time of cutting (cutting), the effects of the present invention can be expressed (Table 1). (Refer to the comparison between Examples 4 to 7 (light incident side) and Examples 8 to 12 (on the side opposite to the light incident side)).
  • both the pressure-sensitive adhesive layers contain a metal (especially silver) corrosion inhibitor in that the above-described effects can be obtained more significantly (see Examples 13 to 16 in Table 1). )
  • the adhesive layer 4 may consist of only one layer or a plurality of layers.
  • the thickness of the adhesive layer 4 is preferably 1 to 10 ⁇ m, more preferably 3 to 8 ⁇ m, from the viewpoints of adhesion, smoothness, reflectance of the reflecting material, and the like.
  • the resin is not particularly limited as long as it satisfies the above conditions of adhesion, heat resistance, and smoothness, polyester resin, urethane resin, acrylic resin, Melamine-based resins, epoxy-based resins, polyamide-based resins, vinyl chloride-based resins, vinyl chloride-vinyl acetate copolymer-based resins, etc. can be used singly or as a mixed resin.
  • polyester-based resins and melamine-based resins or A mixed resin of a polyester-based resin and a urethane-based resin is preferable, and a thermosetting resin in which a curing agent such as isocyanate is mixed such that an isocyanate is mixed with an acrylic resin is more preferable.
  • a method for forming the adhesive layer 4 a conventionally known coating method such as a gravure coating method, a reverse coating method, a die coating method or the like can be used.
  • the adhesive layer 4 is a metal oxide or a metal nitride
  • silicon oxide It can be formed by various vacuum film forming methods such as aluminum oxide, silicon nitride, aluminum nitride, lanthanum oxide, and lanthanum nitride.
  • the adhesive layer 4 may be a single layer (film) of the above metal oxide or metal nitride, or may be a laminate (film) of two or more layers.
  • the resin coat layer 8 prevents intrusion of moisture and chemicals in the air into the metal reflective layer 3 (mirror surface) (and thus prevents corrosion of the metal material (for example, silver) of the reflective layer 3). It is provided for the purpose of protecting from external mechanical pressure, such as impact and scratching.
  • the resin coat layer 8 is provided between the acrylic layer 5 and the metal (preferably silver) reflective layer 3.
  • the resin coat layer 8 is the same type of metal as the metal of the reflective layer 3 (so that the resin coat layer 8 prevents corrosion of the metal (silver) ( It is preferable to contain a silver) corrosion inhibitor.
  • the metal (silver) reflection layer 3 may be provided apart from (without adjoining) the metal (silver) corrosion inhibitor. It is preferable to contain.
  • the resin coat layer 8 may consist of only one layer or a plurality of layers.
  • the thickness of the resin coat layer 8 is preferably 1 to 10 ⁇ m, more preferably 2 to 8 ⁇ m. If the thickness of the resin coating layer 8 is 1 ⁇ m or more, intrusion of moisture and chemicals in the air into the metal reflection layer 3 (mirror surface), and mechanical pressure from the outside, such as impact and scratching, etc. Can be protected from. If the thickness of the resin coat layer 8 is 10 ⁇ m or less, the flexibility can be sufficiently maintained, and cracks and cracks can be effectively prevented.
  • the resin coat layer 8 is mainly composed of a binder (resin) so as to maintain high film adhesion with the metal reflective layer 3 even when installed over a long period of time in an outdoor environment, and to achieve the above object. And a metal (silver) corrosion inhibitor of the same type as the metal of the reflective layer 3.
  • the binder (resin) of the resin coat layer for example, the following resins can be preferably used.
  • Cellulose ester polyester, polycarbonate, polyarylate, polysulfone (including polyethersulfone), polyethylene terephthalate, polyethylene naphthalate, polyester, polyethylene, polypropylene, cellophane, cellulose diacetate, cellulose triacetate, cellulose acetate propionate, cellulose Acetate butyrate, polyvinylidene chloride, polyvinyl alcohol, ethylene vinyl alcohol, syndiotactic polystyrene, norbornene, polymethylpentene, polyetherketone, polyetherketoneimide, polyamide, fluororesin, nylon (registered trademark), polymethyl A methacrylate, an acrylic resin, etc. can be mentioned. Among these, an acrylic resin is preferable.
  • Corrosion inhibitor As a metal (silver) corrosion inhibitor for the resin coat layer 8, from the viewpoint of preventing corrosion of the metal material of the reflective layer 3, the same type of metal as the metal of the reflective layer 3 (Al, Ag, Cr, Cu, Ni, Ti , Mg, Rh, Pt and Au, any element selected from the group of elements), preferably having an adsorptive group for silver.
  • 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 optimum content of the corrosion inhibitor varies depending on the compound used, but is generally preferably in the range of 0.001 to 0.1 g / m 2 .
  • silicone As a corrosion inhibitor for the same type of metal as the metal of the reflective layer (any element selected from the element group consisting of Al, Ag, Cr, Cu, Ni, Ti, Mg, Rh, Pt and Au), silicone It is desirable to be selected from a modified resin, a silane coupling agent, a compound containing a plurality of thiol groups, and a corrosion inhibitor having an adsorptive group for silver described below.
  • Corrosion inhibitors having an adsorptive group for silver include amines and derivatives thereof, compounds having a pyrrole ring, compounds having a triazole ring such as benzotriazole, compounds having a pyrazole ring, compounds having a thiazole ring, and imidazole rings. It is desirable that the compound be selected from a compound having an indazole ring, a copper chelate compound, a thiourea, a mercapto group-containing compound, a naphthalene-based compound, or a mixture thereof. In compounds such as benzotriazole, the ultraviolet absorber may also serve as a corrosion inhibitor. It is also possible to use a silicone-modified resin. The silicone-modified resin is not particularly limited.
  • 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, dicyclohexylamine
  • Examples of the compound 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- '-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 compounds 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.
  • Examples of the compound 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-ethy
  • 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
  • -1,2,4-triazole, 2-mercaptobenzothiazole, 2-mercaptobenzimidazole glycol dimercaptoacetate, 3-mercaptopropyltrimethoxysilane, trimethylolpropane tris ( ⁇ -thiopropionate) or the like Of the mixture.
  • naphthalene-based compounds examples include thionalide.
  • the metal reflective layer 3 formed on the film mirror 20 according to the present invention is a layer made of metal or the like having a function of reflecting sunlight.
  • the surface reflectance of the reflective layer 3 is preferably 80% or more, more preferably 90% or more.
  • the reflective layer 3 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. Among these, it is preferable that Al or Ag is a main component from the viewpoint of reflectance and corrosion resistance, and two or more such metal thin films may be formed. In the present invention, the silver reflective layer 3 containing silver as a main component is particularly preferable.
  • a layer made of a metal oxide such as SiO 2 or TiO 2 may be provided on the reflective layer 3 to further improve the reflectance.
  • the reflective layer 3 for example, a silver reflective layer
  • a wet method or a dry method can be used as a method for forming the reflective layer 3 (for example, a silver reflective layer) in the present invention.
  • the wet method is a general term for a plating method or a metal complex solution coating method, and is a method of forming a film by depositing a metal from a solution.
  • Specific examples include silver mirror reaction and silver layer formation by firing of a silver complex ink (specifically, firing of a coating film formed by applying a silver coating liquid composition containing a silver complex compound).
  • the dry method is a general term for a vacuum film forming method, and specifically includes a resistance heating vacuum deposition method, an electron beam heating vacuum deposition method, an ion plating method, an ion beam assisted vacuum deposition method, and a 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, in the manufacturing method of the film mirror 20 of this invention, it is preferable to form the reflection layer 3 by vapor deposition of silver.
  • the thickness of the reflective layer 3 is preferably 10 to 200 nm, more preferably 30 to 150 nm, from the viewpoint of reflectivity and the like.
  • a particularly suitable silver reflecting layer 3 is a layer mainly composed of silver (preferably a layer made of silver) having a function of reflecting sunlight well.
  • the surface reflectance of the silver reflective layer 3 is also preferably 80% or more, and more preferably 90% or more.
  • the thickness of the silver reflective layer 3 is also preferably 10 to 200 nm, more preferably 30 to 150 nm, from the viewpoint of reflectivity and the like.
  • the surface reflectance of the metal (silver) reflective layer 3 can be measured using a commercially available spectrophotometer.
  • Metal (silver) complex compound having a ligand that can be vaporized / desorbed is formed, the metal (silver) reflective layer 3 is formed by heating and baking a coating film containing a metal (silver) complex compound from which a ligand can be vaporized and desorbed. It may be.
  • Metal (silver) complex compound having a ligand that can be vaporized / desorbed means that the metal (silver) is dissolved in a solution in a stable manner, but the solvent is removed and the mixture is heated and fired. This means a metal (silver) complex compound in which a ligand is thermally decomposed to become CO 2 or a low molecular weight amine compound, which is vaporized / desorbed to leave only a metal simple substance (metal silver).
  • metal (silver) complex compound As for such a metal (silver) complex compound and a method for producing the same, for example, the silver complex compounds and methods for producing the same described in paragraphs “0064” to “0089” of JP-A-2012-137579 are appropriately used. be able to.
  • Nitrogen-containing cyclic compound that can be used in adjacent layer of metal (silver) reflective layer > When forming the metal (silver) reflective layer 3 by heating and baking a coating film containing a metal (silver) complex compound from which a ligand can be vaporized and desorbed when forming the metal (silver) reflective layer 3 It is preferable that the adjacent layer (resin coat layer 8, anchor layer 2, etc.) of the metal (silver) reflective layer 3 contains a nitrogen-containing cyclic compound.
  • the content of the nitrogen-containing cyclic compound in the adjacent layer of the metal (silver) reflective layer 3 is preferably 0.001 to 5% by mass, more preferably 0.01 to 1% by mass.
  • the rust prevention and corrosion prevention functions of the metal (silver) can be effectively expressed.
  • the content of the nitrogen-containing cyclic compound in the adjacent layer of the metal (silver) reflective layer 3 is 5% by mass or less, the embrittlement preventing function of the adjacent layer can be effectively expressed without coloring.
  • a corrosion inhibitor and an antioxidant having an adsorptive group for metal (silver) are preferably used.
  • a desired corrosion prevention effect can be obtained by using a nitrogen-containing cyclic compound.
  • the content of the corrosion inhibitor having an adsorptive group for the metal (silver) in the adjacent layer of the metal (silver) reflective layer 3 is preferably 0.001 to 5% by mass, more preferably 0.01%. To 1% by mass. If the content of the corrosion inhibitor having an adsorptive group for the metal (silver) in the adjacent layer of the metal (silver) reflective layer 3 is 0.001% by mass or more, the corrosion prevention function of the metal (silver) is effective. Can be expressed.
  • the content of the corrosion inhibitor having an adsorptive group for the metal (silver) in the adjacent layer of the metal (silver) reflective layer 3 is 5% by mass or less, the function of preventing the embrittlement of the adjacent layer is achieved without coloring. It can be expressed effectively.
  • Examples of the compound having a pyrrole ring include ⁇ 4-2.
  • compounds listed as corrosion inhibitors having an adsorptive group for silver among the metal (silver) corrosion inhibitors of the resin coating layer 8 of the corrosion inhibitor> compounds specifically exemplified as “compounds having a pyrrole ring” Can be used.
  • Examples of the compound having a triazole ring include ⁇ 4-2.
  • compounds listed as corrosion inhibitors having an adsorptive group for silver among the metal (silver) corrosion inhibitors of the resin coating layer 8 of the corrosion inhibitor> compounds specifically exemplified as “compound having a triazole ring” Can be used.
  • 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 an imidazole ring include ⁇ 4-2.
  • compounds listed as corrosion inhibitors having an adsorptive group for silver among the metal (silver) corrosion inhibitors of the resin coating layer 8 of the corrosion inhibitor> compounds specifically exemplified as “compounds having an imidazole ring” Can be used.
  • Examples of the compound having an indazole ring include 4-chloroindazole, 4-nitroindazole, 5-nitroindazole, 4-chloro-5-nitroindazole, and a mixture thereof.
  • an antioxidant may be used as the nitrogen-containing cyclic compound contained in the adjacent layer (for example, the resin coat layer 8 or the anchor layer 2) of the metal (silver) reflective layer 3 used in the film mirror 20 according to the present invention. It can. When the content of the antioxidant in the adjacent layer of the metal (silver) reflective layer 3 is 0.001% by mass or more, the antioxidant function of the metal (silver) can be effectively expressed. When the content of the antioxidant in the adjacent layer of the metal (silver) reflective layer 3 is 5% by mass or less, the embrittlement preventing function of the adjacent layer can be effectively expressed without coloring.
  • the antioxidant it is preferable to use a phenol-based antioxidant, a thiol-based antioxidant, and a phosphite-based antioxidant.
  • the phenolic antioxidant ⁇ 2-2.
  • various antioxidants listed as antioxidants to be contained in order to prevent deterioration of the acrylic layer 5 of antioxidant> compounds specifically exemplified as “phenolic antioxidants” can be used.
  • the phenolic antioxidant preferably has a molecular weight of 550 or more.
  • thiol-based antioxidant examples include distearyl-3,3′-thiodipropionate, pentaerythritol-tetrakis- ( ⁇ -lauryl-thiopropionate), and the like.
  • phosphite-based antioxidant ⁇ 2-2.
  • various antioxidants listed as antioxidants to be included in order to prevent deterioration of the acrylic layer 5 of the antioxidant> compounds specifically exemplified as “phosphite antioxidants” can be used.
  • the above antioxidant and the following light stabilizer can be used in combination.
  • the content of the light stabilizer in the adjacent layer of the metal (silver) reflective layer 3 is 0.001% by mass or more, the light stabilizing function can be effectively expressed. If the content of the light stabilizer in the adjacent layer of the metal (silver) reflective layer 3 is 5% by mass or less, the embrittlement preventing function of the adjacent layer can be effectively expressed without coloring.
  • hindered amine light stabilizers 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 -Tetramethi Piperidine, tetrakis (2,2,6,6-te
  • nickel-based UV stabilizers include [2,2′-thiobis (4-t-octylphenolate)]-2-ethylhexylamine nickel (II), nickel complex-3,5-di-t-butyl-4- 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. Sebacate, bis (1,2,2,6,6-pentamethyl-4-piperidyl) -2- (3,5-di-t-butyl-4-hydroxybenzyl) -2-n-butyl malonate, or 1 2,2,6,6-pentamethyl-4-piperidinol / tridecyl alcohol and 1,2,3,4-butanetetracarboxylic acid are preferred.
  • Resin Film Support As the resin film-like support (film substrate) 1, various conventionally known resin films can be used. For example, cellulose ester film, polyester film, polycarbonate film, polyarylate film, polysulfone (including polyethersulfone) film, polyethylene terephthalate, polyethylene naphthalate polyester film, polyethylene film, polypropylene film, cellophane, Cellulose diacetate film, cellulose triacetate film, cellulose acetate propionate film, cellulose acetate butyrate film, polyvinylidene chloride film, polyvinyl alcohol film, ethylene vinyl alcohol film, syndiotactic polystyrene film, norbornene resin film, polymethyl Penten film, polyetherketone Irumu, polyether ketone imide film, a polyamide film, a fluororesin film, a nylon film, polymethyl methacrylate film, and acrylic films.
  • At least one selected from the group consisting of polycarbonate films, polyester films such as polyethylene terephthalate, norbornene resin films, cellulose ester films, and acrylic films is preferable.
  • a polyester film such as polyethylene terephthalate or an acrylic film, and it may be a film manufactured by melt casting film formation or a film manufactured by solution casting film formation.
  • the resin film-like support 1 Since the resin film-like support 1 is located farther from the light incident side than the metal (particularly silver) reflective layer 3, it is difficult for ultraviolet rays to reach the resin film-like support 1. In particular, when an ultraviolet absorber is contained in the acrylic layer 5 or the like that is closer to the light incident side than the resin film-like support 1, ultraviolet rays are less likely to reach the resin film-like support 1. Therefore, the resin film-like support 1 can be used even if it is a resin that easily deteriorates with respect to ultraviolet rays. From such a viewpoint, a polyester film such as polyethylene terephthalate can be used as the resin film-like support 1.
  • the thickness of the resin film-like support 1 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 250 ⁇ m. The thickness is preferably 20 to 200 ⁇ m.
  • the pressure-sensitive adhesive layer 6 of the film mirror 20 is a layer for attaching the film mirror 20 to a supporting substrate with the pressure-sensitive adhesive layer 6 to form a solar light reflecting mirror.
  • the film mirror 20 may have a release layer 7 on the side opposite to the light incident side of the pressure-sensitive adhesive layer 6. In the case where the film mirror 20 has the release layer 7, the film mirror 20 can be attached to the support substrate via the pressure-sensitive adhesive layer 6 after the release layer 7 is peeled from the pressure-sensitive adhesive layer 6.
  • the corrosion inhibitor described in the section ⁇ Corrosion inhibitor> it is at least one selected from the group consisting of a mercapto compound and a benzotriazole compound, and a mercapto compound is particularly preferable.
  • the content of the same kind of metal (silver) corrosion inhibitor as the metal of the reflective layer 3 in the pressure-sensitive adhesive layer 6 is preferably 0.01% by mass or more and 10% by mass or less, more preferably 0.1% by mass. % Or more and 3% by mass or less.
  • a desired corrosion prevention function can be effectively exhibited. If the content of the metal (silver) corrosion inhibitor in the pressure-sensitive adhesive layer 6 is 10% by mass or less, the embrittlement prevention function that can prevent the pressure-sensitive adhesive layer 6 from becoming brittle without being colored is effective. Can be expressed.
  • the pressure-sensitive adhesive layer 6 is not particularly limited, and for example, any of a dry laminating agent, a wet laminating agent, a pressure-sensitive adhesive, a heat seal agent, a hot melt agent, and the like is used.
  • the adhesive include polyester resin, urethane resin, polyvinyl acetate resin, acrylic resin, silicone resin (for example, addition reaction type silicone adhesive), nitrile rubber, and silicone rubber. It is done.
  • the pressure-sensitive adhesive layer 6 may contain a curing accelerator such as a platinum-based catalyst.
  • the method for producing the pressure-sensitive adhesive layer 6 is not particularly limited, and a laminating method (for example, a pressure-sensitive adhesive composition is applied on the film of the resin film-like support 1 and the film of the release layer 7 and heated for adhesion.
  • the adhesive layer 6 is formed, and the film of the resin film-like support 1 and the film of the release layer 7 are laminated through the adhesive layer 6 and bonded to each other.
  • the method can be applied.
  • 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 6 is usually preferably in the range of about 1 to 100 ⁇ m from the viewpoint of the pressure-sensitive adhesive effect, the drying speed, and the like.
  • the hardness of the pressure-sensitive adhesive layer 6 is the effect of the present invention (the pressure-sensitive adhesive of the pressure-sensitive adhesive layer 6 protrudes to the side (cut) at the time of cutting, and covers the metal reflective layer 3 at the end (cut). 3 can be effectively prevented), and is not particularly limited, but is preferably 10 7 dyn / cm 2 or less, more preferably 1 ⁇ 10 6. It is in the range of 4 to 10 6 dyn / cm 2 . If the hardness of the pressure-sensitive adhesive layer 6 is within the above range, the pressure-sensitive adhesive that protrudes to the side (cut end face) at the time of cutting is then applied to a solar power generation reflector for a long period of time during solar operation. Even when exposed, the metal reflective layer 3 at the end (cut end; end face of the cut) can be continuously covered without lowering (deteriorating) the viscosity.
  • Transparent hard coat layer A transparent hard coat layer (not shown) may be provided on the light incident side of the acrylic layer 5.
  • the transparent hard coat layer is provided for the purpose of preventing scratches on the surface of the film mirror 20 and adhesion of dirt.
  • the transparent hard coat layer is preferably either the outermost layer, the second layer, or the third layer from the light incident side.
  • Another thin layer (preferably 1 ⁇ m or less) may be provided on the transparent hard coat layer.
  • the thickness of the hard coat layer is preferably 0.05 ⁇ m or more and 10 ⁇ m or less from the viewpoint of preventing the film mirror 20 from being warped while obtaining sufficient scratch resistance. More preferably, they are 1 micrometer or more and 10 micrometers or less.
  • the material for forming the transparent hard coat layer is not particularly limited as long as transparency, weather resistance, hardness, mechanical strength, and the like can be obtained.
  • the transparent hard coat layer can be composed of acrylic resin, urethane resin, melamine resin, epoxy resin, organic silicate compound, silicone resin, and the like.
  • silicone resins and acrylic resins are preferable in terms of hardness and durability. Further, in terms of curability, flexibility, and productivity, those made of an active energy ray-curable acrylic resin or a thermosetting acrylic resin are preferable.
  • the active energy ray-curable acrylic resin or thermosetting acrylic resin is a composition containing a polyfunctional acrylate, an acrylic oligomer, a reactive diluent, and the like 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 oligomer has a molecular weight that is somewhat large, for example, a weight average molecular weight of 1000 or more and less than 10,000.
  • 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.), Dainippon Ink and Chemicals Co., Ltd. (trade name “UNIDIC (registered trademark)” series, etc.), Toa Gosei Chemical Industry Co., Ltd.
  • thermosetting resin composed of a partially hydrolyzed oligomer of an alkoxysilane compound, a heat A hard coat made of a curable polysiloxane resin, an ultraviolet curable acrylic hard coat made of an acrylic compound having an unsaturated group, and a thermosetting inorganic material are preferable.
  • materials that can be used for the transparent hard coat layer include an aqueous colloidal silica-containing acrylic resin (Japanese Patent Laid-Open No. 2005-66824), a polyurethane resin composition (Japanese Patent Laid-Open No.
  • aqueous silicone compound as a binder.
  • a resin film Japanese Patent Laid-Open No. 2004-142161
  • a photocatalytic oxide-containing silica film such as titanium oxide or alumina
  • a photocatalytic film such as titanium oxide or niobium oxide having a high aspect ratio
  • a photocatalyst-containing fluororesin coating film (Pierex Technologies), an organic / inorganic polysilazane film, a film using a hydrophilization accelerator (AZ Electronics Co., Ltd.) for organic / inorganic polysilazane, and the like.
  • thermosetting silicone-based transparent hard coat layer a partially hydrolyzed oligomer of an alkoxysilane compound synthesized by a known method can be used.
  • An example of the synthesis method is as follows. First, tetramethoxysilane or tetraethoxysilane is used as an alkoxysilane compound, and a predetermined amount of water is added to the alkoxysilane compound in the presence of an acid catalyst such as hydrochloric acid or nitric acid to remove by-produced alcohol from room temperature to 80 ° C. React with.
  • an acid catalyst such as hydrochloric acid or nitric acid
  • the alkoxysilane is hydrolyzed, and further, a partially hydrolyzed oligomer of the alkoxysilane compound having an average polymerization degree of 4 to 8 having two or more silanol groups or alkoxy groups in one molecule is obtained by the condensation reaction.
  • a curing catalyst such as acetic acid or maleic acid is added to this and dissolved in an alcohol or glycol ether organic solvent to obtain a thermosetting silicone hard coat liquid. And this is apply
  • an acrylic compound having an unsaturated group such as pentaerythritol di (meth) acrylate, diethylene glycol di (meth) acrylate, trimethylolpropane tri (meth) acrylate, tetramethyloltetra
  • an acrylic compound having an unsaturated group such as pentaerythritol di (meth) acrylate, diethylene glycol di (meth) acrylate, trimethylolpropane tri (meth) acrylate, tetramethyloltetra
  • a polyfunctional (meth) acrylate mixture such as (meth) acrylate can be used, and a photopolymerization initiator such as benzoin, benzoin methyl ether, or benzophenone is blended and used.
  • a hydrophilic property by subjecting the transparent hard coat layer to a surface treatment.
  • a surface treatment examples thereof include corona treatment (Japanese Patent Laid-Open No. 11-172028), plasma surface treatment, ultraviolet / ozone treatment, surface protrusion formation (Japanese Patent Laid-Open No. 2009-226613), and surface fine processing.
  • the transparent hard coat layer As a method for producing the transparent hard coat layer, conventionally known coating methods such as a gravure coating method, a reverse coating method, and a die coating method can be used.
  • the transparent hard coat layer is made of an inorganic material
  • it can be formed, for example, by depositing silicon oxide, aluminum oxide, silicon nitride, aluminum nitride, lanthanum oxide, lanthanum nitride, or the like by a vacuum film forming method.
  • the vacuum film forming method include a resistance heating vacuum deposition method, an electron beam heating vacuum deposition method, an ion plating method, an ion beam assisted vacuum deposition method, and a sputtering method.
  • the transparent hard coat layer for example, the “layer for preventing adhesion of dirt” described in paragraph “0105” of JP-A-2012-137579 and the paragraphs “0110” to “0113” described in publicly known JP-A-2012-137579.
  • a “scratch prevention layer” can be applied.
  • what is described in paragraphs “0015” to “0031” of JP2011-128501A can also be applied.
  • a hard coat layer containing a polyfunctional acrylic monomer and a silicone resin can be given.
  • the polyfunctional acrylic monomer is hereinafter referred to as “A” component
  • the silicone resin is hereinafter referred to as “B” component.
  • the polyfunctional acrylic monomer “A” component preferably has an unsaturated group, particularly an active energy ray-reactive unsaturated group.
  • the active energy ray referred to in this specification preferably means an electron beam or an ultraviolet ray.
  • a radical polymerization monomer is used, preferably a bifunctional or higher functional monomer having an ⁇ , ⁇ -unsaturated double bond in the molecule.
  • a certain polyfunctional acrylate type or polyfunctional methacrylate type monomer may be mentioned.
  • a vinyl monomer, an allyl monomer, or a monofunctional monomer may be included.
  • the radical polymerization monomer can be used alone or in combination of two or more kinds of monomers in order to adjust the crosslinking density.
  • the “A” component in addition to these relatively low molecular weight compounds, for example, so-called narrowly-defined monomers having a molecular weight of less than 1000, oligomers and prepolymers having a somewhat high molecular weight, for example, a weight average molecular weight of 1000 or more and less than 10,000 may be used. Is possible.
  • monofunctional (meth) acrylate monomers include 2- (meth) acryloyloxyethyl phthalate, 2- (meth) acryloyloxyethyl-2-hydroxyethyl phthalate, and 2- (meth) acryloyloxyethyl.
  • polyfunctional (meth) acrylate monomer examples include 1,3-butylene glycol di (meth) acrylate, 1,4-butanediol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, 1,9-nonanediol di (meth) acrylate, bisphenol A di (meth) acrylate, bisphenol F di (meth) acrylate, diethylene glycol di (meth) acrylate, hexahydrophthalic acid di (meth) acrylate, neopentyl hydroxypivalate Glycol di (meth) acrylate, neopentyl glycol di (meth) acrylate, hydroxypivalate ester neopentyl glycol di (meth) acrylate, pentaerythritol di (meth) acrylate, di (meth) acrylate phthalate Rate, polyethylene glycol di (meth) acrylate
  • Examples of such commercially available “A” component that is a polymerizable organic compound include Aronix M-400, M-408, M-450, M-305, M-309, M-manufactured by Toagosei Co., Ltd. 310, M-315, M-320, M-350, M-360, M-208, M-210, M-215, M-220, M-225, M-233, M-240, M-245, M-260, M-270, M-1100, M-1200, M-1210, M-1310, M-1600, M-221, M-203, TO-924, TO-1270, TO-1231, TO- 595, TO-756, TO-1343, TO-902, TO-904, TO-905, TO-1330, KAYARAD D-310, D-330, DPHA, DPCA-20, DP manufactured by Nippon Kayaku Co., Ltd.
  • the content of the polymerizable organic compound “A” component is 10 to 90% by mass with the total composition of “A” + “B” being 100% by mass from the viewpoint of improving antifouling properties and light resistance. It is preferably 15 to 80% by mass.
  • the silicone resin “B” component is preferably a silicone resin having an active energy ray-reactive unsaturated group.
  • the silicone resin contains a polyorganosiloxane, and is preferably a compound having a polyorganosiloxane chain having an active energy ray-curable unsaturated bond in the molecule.
  • the monomer (a) having 1 to 50% by mass of a radically polymerizable double bond and a polyorganosiloxane chain, and a monomer other than (a) having a radically polymerizable double bond and a reactive functional group ( b) a polymer obtained by polymerizing a monomer containing 10 to 95% by mass and a monomer having a radical polymerizable double bond other than (a) and (b) (c) 0 to 89% by mass Activity which is a vinyl copolymer having a number average molecular weight of 5000 to 100,000, which is obtained by reacting ( ⁇ ) with a functional group capable of reacting with the above-mentioned reactive functional group and a compound ( ⁇ ) having a radical polymerizable double bond It is preferable that it is an energy beam curable resin composition.
  • the number average molecular weight of the active energy ray-curable resin composition can be measured by a chromatography method (GPC method), a terminal group determination method, or the like.
  • the monomer (a) having a radical polymerizable double bond and a polyorganosiloxane chain include, for example, one end of Silaplane FM-0711, FM-0721, FM-0725, etc. manufactured by Chisso Corporation.
  • Examples include (meth) acryloxy group-containing polyorganosiloxane compounds, AC-SQ SI-20 manufactured by Toa Gosei Co., Ltd., POSS (Polyhydrogen Oligomeric Silsesquioxane) series acrylate and methacrylate-containing compounds manufactured by Hybrid Plastics.
  • the “B” component can be used alone or in combination of two or more depending on the required performance.
  • the copolymerization ratio of the “B” component is determined based on the monomer constituting the polymer (the copolymer of the “A” component and the “B” component) (the “A” component of the polyfunctional acrylic monomer and the silicone resin “ It is preferably 1 to 50% by mass, more preferably 10 to 35% by mass, based on the total weight of component “B”. If the copolymerization ratio of the “B” component is 1% by mass or more, antifouling properties and weather resistance can be sufficiently imparted to the upper surface of the cured product, and if it is 50% by mass or less, scratch resistance is obtained.
  • This transparent hard coat layer is preferably flexible and does not warp.
  • the transparent hard coat layer on the outermost surface layer of the film mirror may form a dense cross-linked structure, which may cause the film to warp or bend easily and may be difficult to handle. become. In such a case, it is preferable to design so as to obtain flexibility and flatness by adjusting the amount of the inorganic substance in the transparent hard coat layer composition.
  • the transparent hard coat layer may contain an ultraviolet absorber or an antioxidant.
  • the ultraviolet absorber and the antioxidant include those described in ⁇ 2-2. UV absorber> and ⁇ 2-3. Antioxidants> can be used.
  • a preferred UV absorber in a hard coat layer containing a polyfunctional acrylic monomer and a silicone resin is a benzotriazole UV absorber.
  • a benzotriazole-based ultraviolet absorber in the hard coat layer, it is possible to obtain an excellent effect that not only the weather resistance is further improved, but also the falling angle can be further reduced.
  • the compound represented by the following general formula (9) when the compound represented by the following general formula (9) is contained in the hard coat layer, the effect of lowering the sliding angle is remarkable.
  • the falling angle refers to a value obtained by dropping a water drop on a horizontal mirror, and then gradually increasing the tilt angle of the mirror, and measuring the minimum angle at which the water drop of a predetermined weight that was stationary falls. Say. It can be said that the smaller the tumbling angle, the easier the water droplets to roll off the surface, and the surface to which the water droplets hardly adhere.
  • the amount of the UV absorber used in the transparent hard coat layer is preferably 0.1 to 20% by mass in order to improve the weather resistance while maintaining good adhesion. More preferably, it is 0.25 to 15% by mass, and more preferably 0.5 to 10% by mass.
  • an organic antioxidant such as a phenol-based antioxidant, a thiol-based antioxidant, and a phosphite-based antioxidant.
  • the falling angle can also be reduced by including an organic antioxidant in the hard coat layer.
  • An antioxidant and a light stabilizer may be used in combination.
  • a light stabilizer that can be used in combination with an antioxidant a nickel-based ultraviolet stabilizer can be used in addition to the hindered amine light stabilizer exemplified below.
  • hindered amine light stabilizers 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 -Tetramethi Piperidine, tetrakis (2,2,6,6-te
  • 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.
  • nickel-based UV stabilizers can also be used as light stabilizers
  • [2,2′-thiobis (4-t-octylphenolate)]-2-ethylhexylamine nickel (II) can be used as a nickel-based UV stabilizer.
  • the transparent hard coat layer particularly the hard coat layer containing a polyfunctional acrylic monomer and a silicone resin, preferably contains an initiator for initiating polymerization.
  • Photoinitiators of active energy ray-curable resins such as ultraviolet rays are preferably used. Examples include benzoin and derivatives thereof, acetophenone, benzophenone, hydroxybenzophenone, Michler's ketone, ⁇ -amyloxime ester, thioxanthone, and the like.
  • the above initiator can also be used as a photosensitizer.
  • a sensitizer such as n-butylamine, triethylamine, tri-n-butylphosphine can be used.
  • the amount of the initiator or photosensitizer used is 0.1 to 15 parts by mass with respect to 100 parts by mass of the composition (material for forming a transparent hard coat layer containing a polyfunctional acrylic monomer and a silicone resin), preferably Is 1 to 10 parts by mass, more preferably 2 to 5 parts by mass.
  • Two or more kinds of initiators can be used in combination, and particularly in the case of radical initiators, at least two kinds of initiators, preferably radical initiators that absorb different wavelengths, are used. More preferably, two kinds of initiators having different ultraviolet absorption wavelengths are used.
  • the polymerization reaction of all the monomers may not be performed by the initiator.
  • the initiator that absorbs longer wavelengths improves the reactivity, but the initiator may be colored during long-term use. Therefore, it is preferable to use radical initiators that absorb different wavelengths in order to improve the weather resistance and also the polymerization reactivity without coloring even during long-term use.
  • various additives can be further blended as necessary.
  • a surfactant for example, a surfactant, a leveling agent and an antistatic agent can be used.
  • ⁇ Leveling agents are effective in reducing surface irregularities.
  • a dimethylpolysiloxane-polyoxyalkylene copolymer for example, SH190 manufactured by Toray Dow Corning Co., Ltd.
  • SH190 manufactured by Toray Dow Corning Co., Ltd. is suitable as the silicone leveling agent.
  • a gas barrier layer may be provided on the light incident side of the metal (particularly silver) reflective layer.
  • a gas barrier layer is preferably provided between the acrylic layer and the metal (especially silver) reflective layer.
  • the gas barrier layer is intended to prevent the deterioration of the humidity, especially the resin film-like support and the constituent layers supported by the resin film-like support due to high humidity, but it has special functions and applications. As long as it has the function of preventing deterioration, a gas barrier layer of various modes can be provided. For details of the gas barrier layer, for example, paragraphs “0044” to “0096” of the publicly known international publication number WO2011 / 096151 A1 can be applied.
  • Anchor layer> The anchor layer 2 is made of a resin, and is a layer provided to bring the resin film-like support 1 and the metal (particularly silver) reflective layer 3 into close contact. Accordingly, the anchor layer 2 is resistant to the adhesion between the resin film-like support 1 and the metal (especially silver) reflective layer 3, and can withstand heat when the metal (especially silver) reflective layer 3 is formed by vacuum deposition or the like. The heat resistance to obtain and the smoothness for extracting the high reflective performance which the metal (especially silver) reflective layer 3 originally has are required.
  • the resin used for the anchor layer 2 is not particularly limited as long as it satisfies the above adhesiveness, heat resistance, and smoothness conditions, and is a polyester resin, an acrylic resin, a melamine resin, an 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 viewpoint of weather resistance, polyester resin and melamine resin mixed resin or polyester resin and acrylic resin can be used. A mixed resin of a resin is preferable, and a thermosetting resin in which a curing agent such as isocyanate is further mixed is more preferable.
  • the thickness of the anchor layer 2 is preferably 0.01 to 3 ⁇ m, more preferably 0.1 to 2 ⁇ m. By satisfying this range, it is possible to cover the unevenness of the surface of the resin film-like support 1 while maintaining the adhesion, to improve the smoothness and to sufficiently cure the anchor layer 2, and as a result, the film The reflectance of the mirror 20 can be increased.
  • the anchor layer 2 has the above ⁇ 4-2. It is preferable to contain the corrosion inhibitor described in ⁇ Corrosion inhibitor>.
  • the formation method of the anchor layer 2 can use conventionally well-known coating methods, such as a gravure coat method, a reverse coat method, and a die coat method.
  • the film mirror 20 according to the present invention may have a release layer 7 on the side opposite to the light incident side of the pressure-sensitive adhesive layer 6.
  • the film is shipped with the release layer 7 attached to the pressure-sensitive adhesive layer 6, and the film mirror 20 having the pressure-sensitive adhesive layer 6 is peeled off from the release layer 7 and bonded to another substrate.
  • a mirror for reflecting sunlight and a reflecting device for solar thermal power generation can be formed.
  • the release layer 7 may be any layer that can impart protection to the metal (particularly silver) reflective layer 3, such as an acrylic film or sheet, a polycarbonate film or sheet, a polyarylate film or sheet, a polyethylene naphthalate film or sheet. , Polyethylene terephthalate film or sheet, plastic film or sheet such as fluorine film, or resin film or sheet kneaded with titanium oxide, silica, aluminum powder, copper powder, etc. A resin film or sheet in which a metal is subjected to surface processing such as metal deposition is used.
  • the thickness of the release layer 7 is not particularly limited but is usually preferably in the range of 12 to 250 ⁇ m.
  • a concave portion or a convex portion may be provided before the release layer 7 is bonded to the film mirror 20 (excluding the release layer 7), and may be pasted. Molding may be performed, and bonding and molding so as to have a concave portion or a convex portion may be performed at the same time.
  • the pressure-sensitive adhesive layer 6 is further cut (by a shear stress at the time of cutting) by further cutting the film mirror 20 described above (to a predetermined size, for example, a size to be attached to a supporting substrate).
  • a predetermined size for example, a size to be attached to a supporting substrate.
  • adhesive layer 4 using an adhesive containing a metal (especially silver) corrosion inhibitor The metal (especially silver) of the cut end face (cut edge) by extending the adhesive containing the metal (especially silver) corrosion inhibitor It is good also as a film mirror formed by covering the reflective layer.
  • the intended object of the present invention providing a film mirror having high corrosion resistance even at the cut end face after cutting) can be achieved.
  • Such a form is usually used by cutting the film mirror 20 (product) into a predetermined size at the production stage of the solar reflective mirror, but a film mirror product obtained by cutting the film mirror 20 into a predetermined size in advance. This is because it may be sold (provided).
  • the solar reflective mirror has a film mirror and a self-supporting base material (supporting base material), and the film mirror is bonded to the self-supporting base material (supporting base material) via an adhesive layer. ing.
  • the film mirror is cut into a predetermined size (for example, a size for attaching to a support base material). Specifically, the film mirror is cut to a predetermined size, and the metal reflective layer on the cut end face (cut edge) is covered with an adhesive containing a metal corrosion inhibitor. Thereby, the intended object of the present invention can be achieved.
  • the self-supporting base material preferably has one of the following configurations A and B.
  • A It has a pair of metal flat plates and an intermediate layer provided between the metal flat plates, and the intermediate layer is a layer having a hollow structure or a layer made of a resin material.
  • a resin material layer having a hollow structure A resin material layer having a hollow structure.
  • self-supporting base material means the opposite edge when cut to a size used as a base material (support base material) for a mirror for sunlight reflection By supporting the portion, it indicates that the substrate has rigidity enough to support the substrate. Since the base material (support base material) of the mirror for sunlight reflection has self-supporting properties, it is excellent in handleability when installing the mirror for sunlight reflection, and a holding member for holding the mirror for sunlight reflection Therefore, it is possible to reduce the weight of the solar power generation reflecting device, and it is possible to suppress power consumption during solar tracking.
  • the self-supporting base material is composed of a pair of metal flat plates and an intermediate layer provided between the metal flat plates, and the intermediate layer is a layer having a hollow structure.
  • the metal flat plate has high flatness
  • the intermediate layer is a layer having a hollow structure or a layer composed of a resin material.
  • the base material can be significantly reduced in weight, and the rigidity can be increased by the relatively lightweight intermediate layer. It becomes possible to do. Even in the case where a layer made of a resin material is used as the intermediate layer, it is possible to further reduce the weight by using a resin material layer having a hollow structure.
  • the intermediate layer when the intermediate layer has a hollow structure, the intermediate layer functions as a heat insulating material, so that the temperature change of the metal flat plate on the back side is prevented from being transmitted to the film mirror, preventing condensation and deterioration due to heat. Can be suppressed.
  • metal flat plate forming the surface layer of the configuration A
  • steel plate copper plate, aluminum plate, aluminum plated steel plate, aluminum alloy plated steel plate, copper plated steel plate, tin plated steel plate, chrome plated steel plate, stainless steel plate, etc.
  • a high metal material can be preferably used.
  • the intermediate layer of the configuration A has a hollow structure
  • a material such as a metal, an inorganic material (glass or the like), or a resin
  • a hollow structure a cellular structure made of a foamed resin, a three-dimensional structure having a wall surface made of a metal, an inorganic material, or a resin material (such as a honeycomb structure), a resin material to which hollow fine particles are added, or the like can be used.
  • the cell structure of the foamed resin refers to a material in which a gas is finely dispersed in a resin material and formed into a foamed or porous shape.
  • a known foamed resin material can be used, but polyethylene or the like can be used.
  • the honeycomb structure represents a general three-dimensional structure composed of a plurality of small spaces surrounded by side walls.
  • the resin material constituting the wall surface is a homopolymer or copolymer of olefins such as ethylene, propylene, butene, isoprene pentene, and methylpentene.
  • Acrylic derivatives such as polyolefin (for example, polypropylene, high density polyethylene), polyamide, polystyrene, polyvinyl chloride, polyacrylonitrile, ethylene-ethyl acrylate copolymer, vinyl acetate copolymers such as polycarbonate, ethylene-vinyl acetate copolymer Terpolymers such as ionomers and ethylene-propylene-dienes, and thermoplastic resins such as ABS resins, polyolefin oxides and polyacetals are preferably used. In addition, these may be used individually by 1 type, or may mix and use 2 or more types.
  • polypropylene resins or resins mainly composed of polypropylene resins such as olefin resins or resins mainly composed of olefin resins
  • the resin material may contain an additive.
  • the additive include silica, mica, talc, calcium carbonate, glass fiber, carbon fiber and other inorganic fillers, plasticizers, stabilizers, colorants, charging agents.
  • An inhibitor, a flame retardant, a foaming agent, etc. are mentioned.
  • the intermediate layer may be a layer made of a resin plate as a layer made of a resin material.
  • the resin material forming the intermediate layer the above-described resin film support (for a film mirror)
  • the same material as that constituting the (film substrate) can be preferably used.
  • the intermediate layer need not be provided in all regions of the base material (support base material), and provided in a part of the region as long as the flatness of the metal flat plate and the self-supporting property as the base material can be ensured. It may be.
  • the intermediate layer has the above-described three-dimensional structure, it is preferable to provide the three-dimensional structure in a region of about 90 to 95% with respect to the area of the metal flat plate. It is preferable to provide it.
  • the self-supporting base material can be a layer made of a resin material having a hollow structure.
  • the base material is made of a resin-only layer, the thickness required to obtain rigidity sufficient to provide self-supporting properties increases, resulting in an increase in the weight of the base material.
  • a resin sheet having a smooth surface is provided as a surface layer, and the resin material having a hollow structure is used as an intermediate layer from the viewpoint of increasing the regular reflectance of the film mirror. preferable.
  • the same material as that constituting the resin film-like support of the above-mentioned film mirror can be preferably used, and as the resin material constituting the hollow structure, the above-mentioned foamed material or three-dimensional material can be used.
  • the same resin material as that used for the structure can be preferably used.
  • the solar power generation reflecting device includes a solar light reflecting mirror and a holding member that holds the solar light reflecting mirror.
  • the holding member preferably holds the sunlight reflecting mirror in a state where the sun can be tracked.
  • the holding member has a configuration for holding the sunlight reflecting mirror in a state in which the sun can be tracked.
  • it may be driven manually, or a separate driving device is provided to automatically track the sun. It is good also as a structure.
  • Comparative Example 17 (Production of film mirror) An outline of the layer structure of Comparative Example 17 is shown in FIG.
  • the resin film-like support 1 a biaxially stretched polyester film (polyethylene terephthalate film, thickness 25 ⁇ m) was used.
  • polyester resin Polyethylene terephthalate film
  • melamine resin Super Becamine J-820, manufactured by DIC Corporation
  • TDI isocyanate (2,4-tolylene) Isocyanate TDI isocyanate (2,4-tolylene) Isocyanate
  • HDMI-based isocyanate (1,6-hexamethylene diisocyanate) in a resin solid content ratio of 20: 1: 1: 2 (mass ratio) and a solid content concentration of 10% by mass in toluene.
  • a transparent acrylic film (Acryprene HBS010P, thickness 100 ⁇ m, manufactured by Mitsubishi Rayon Co., Ltd.) is laminated on the resin coat layer 8 by a dry lamination process as an acrylic layer 5 at a lamination temperature of 60 ° C. did.
  • the formation method of the adhesive layer 4 is as follows.
  • Polyester resin (Polyester SP-181, manufactured by Nippon Synthetic Chemical Industry Co., Ltd.), Melamine resin (Super Becamine J-820, manufactured by DIC Corporation), TDI isocyanate (2,4-tolylene diisocyanate), HDMI isocyanate
  • a resin in which (1,6-hexamethylene diisocyanate) is mixed in toluene at a resin solid content ratio of 20: 1: 1: 2 (mass ratio) to a solid content concentration of 10% by mass is added to the resin coating layer 8.
  • Comparative Examples 18 and 19, Examples 1 to 16, 20, and 21 (Production of film mirror) In Comparative Examples 18 and 19, and Examples 1 to 16, 20, and 21, the film mirror was formed in the same manner as Comparative Example 17 except that the adhesive layer 4 and the pressure-sensitive adhesive layer 6 in FIG. Produced.
  • an addition reaction type silicone pressure-sensitive adhesive X-40- having a weight average molecular weight of 500,000 is used. 3103 (trade name, manufactured by Shin-Etsu Chemical Co., Ltd.) and 1 part by weight of platinum catalyst, CAT-PL-50T (trade name, manufactured by Shin-Etsu Chemical Co., Ltd.), 100 parts by weight, and “Adhesion” in Table 1 as necessary.
  • a predetermined amount of the silver corrosion inhibitor described in the column “Change the agent layer 4 to the following content” was added to form a 35 mass% toluene solution on the resin coating layer 8, and the coating was applied at 80 ° C. for 30 seconds.
  • a silicone pressure-sensitive adhesive layer (Si-based) having a thickness of 18 ⁇ m was formed by heating.
  • polyester resin Polyethylene SP-181, manufactured by Nippon Synthetic Chemical Industry Co., Ltd.
  • melamine resin Super Becamine J-820 (manufactured by DIC Corporation)
  • TDI isocyanate (2,4-tolylene diisocyanate) HDMI isocyanate (1,6-hexamethylene diisocyanate) in a resin solid content ratio of 20: 1: 1: 2 (Mass ratio) and a predetermined amount of silver corrosion inhibitor described in the column of “Change the pressure-sensitive adhesive layer 6 to the following content” in Table 1 is added, so that the solid content concentration is 10% by mass in toluene.
  • the visual evaluation criteria for damage (particularly corrosion from the cut end face) of the silver reflecting surface in the evaluation test (1) are as follows.
  • the visual evaluation criteria for damage (particularly corrosion from the cut end face) of the silver reflecting surface in the evaluation test (2) are as follows.
  • Table 1 shows the contents and evaluation results of each comparative example and example.
  • 1 resin film-like support 2 anchor layer, 3 Metal (silver) reflective layer, 4 Adhesive layer or adhesive layer, 5 Acrylic layer (with UV absorber), 6 adhesive layer, 7 release layer, 8 resin coating layer, 20 Film mirror.

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Abstract

Selon la présente invention, afin de proposer un miroir à film, qui a une résistance à la corrosion élevée même sur une surface d'extrémité découpée après découpe, et un appareil réfléchissant pour génération d'énergie thermique solaire, le miroir à film de la présente invention ayant une couche réfléchissante métallique disposée sur un corps de support de type film de résine est caractérisé en ce qu'il a une couche adhésive sur le côté entrée de lumière de la couche réfléchissante ou sur le côté arrière de la couche réfléchissante, et en ce qu'il a la couche adhésive contenant un inhibiteur de corrosion pour un même genre de métal avec lequel la couche réfléchissante est formée.
PCT/JP2013/077274 2012-10-16 2013-10-07 Miroir à film et appareil réfléchissant pour génération d'énergie thermique solaire WO2014061497A1 (fr)

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KR20200042933A (ko) * 2017-09-29 2020-04-24 니뽄 도쿠슈 도교 가부시키가이샤 광파장 변환 장치 및 광복합 장치
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JP2020100623A (ja) * 2015-01-06 2020-07-02 セリックス バイオ プライヴェート リミテッドＣｅｌｌｉｘ Ｂｉｏ Ｐｒｉｖａｔｅ Ｌｉｍｉｔｅｄ 炎症及び疼痛の治療のための組成物及び方法
JP2018036604A (ja) * 2016-09-02 2018-03-08 コニカミノルタ株式会社 光反射フィルム及び液晶表示装置用バックライトユニット
KR20200042933A (ko) * 2017-09-29 2020-04-24 니뽄 도쿠슈 도교 가부시키가이샤 광파장 변환 장치 및 광복합 장치
KR102470285B1 (ko) * 2017-09-29 2022-11-23 니뽄 도쿠슈 도교 가부시키가이샤 광파장 변환 장치 및 광복합 장치

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