WO2015098627A1 - Miroir à film et dispositif réfléchissant pour génération de puissance thermique solaire l'utilisant - Google Patents

Miroir à film et dispositif réfléchissant pour génération de puissance thermique solaire l'utilisant Download PDF

Info

Publication number
WO2015098627A1
WO2015098627A1 PCT/JP2014/083301 JP2014083301W WO2015098627A1 WO 2015098627 A1 WO2015098627 A1 WO 2015098627A1 JP 2014083301 W JP2014083301 W JP 2014083301W WO 2015098627 A1 WO2015098627 A1 WO 2015098627A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
resin
film
acrylate
meth
Prior art date
Application number
PCT/JP2014/083301
Other languages
English (en)
Japanese (ja)
Inventor
鈴木　利継
Original Assignee
コニカミノルタ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by コニカミノルタ株式会社 filed Critical コニカミノルタ株式会社
Publication of WO2015098627A1 publication Critical patent/WO2015098627A1/fr

Links

Images

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/08—Mirrors
    • G02B5/0808—Mirrors having a single reflecting layer
    • 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
    • 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 using the film mirror.
  • Solar energy is considered to be the most stable and abundant amount of natural energy as an alternative energy to fossil fuels.
  • the vast desert spreads near the equator which is called the world's sun belt, and the solar energy that falls there is truly inexhaustible.
  • 7,000 GW of energy can be obtained if only a few percent of the desert that extends to the southeastern United States is used. It is also believed that 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 sunlight, ultraviolet rays, heat, wind and rain, sandstorms, etc., conventionally, a glass mirror having good weather resistance has been used.
  • the glass mirror has high environmental durability, but it is damaged during transportation, and because of its heavy mass, it is necessary to increase the strength of the frame on which the mirror is installed, which increases the construction cost of the plant. There was a problem.
  • film mirrors are required to have high durability like conventional glass mirrors. Moreover, since the film mirror used for solar thermal power generation usually has a parabolic shape, the film mirror is also required to have appropriate flexibility.
  • film mirrors usually do not have self-supporting properties, when mounting a film mirror on a solar power generation reflector, it is affixed to a supporting substrate having self-supporting properties via an adhesive layer or an adhesive layer. (For example, US 2012/0107609). Then, by controlling the composition and thickness of the adhesive layer and the pressure-sensitive adhesive layer, it is possible to impart appropriate flexibility to the film mirror.
  • the present invention has been made in view of the above problems, and in a film mirror in which an adhesive layer or a pressure-sensitive adhesive layer is disposed on the side opposite to the light incident side with respect to the metal reflection layer, its weather resistance and light resistance It is an object of the present invention to provide means capable of further improving the property and maintaining the regular reflectance over a long period of time.
  • the present inventor has intensively studied to solve the above problems. As a result, it has been found that the above problem can be solved by disposing a layer containing a cellulose resin (cellulose resin layer) under the adhesive layer or the pressure-sensitive adhesive layer (on the side opposite to the light incident side).
  • the invention has been completed.
  • the above-described problem has at least a translucent resin layer, a resin base material, a light reflecting layer, an adhesive layer or a pressure-sensitive adhesive layer, and a cellulose resin layer in order from the light incident side, or from the light incident side.
  • a film mirror comprising at least a light-transmitting resin layer, a light reflecting layer, a resin base material, an adhesive layer or a pressure-sensitive adhesive layer, and a cellulose resin layer.
  • the present invention in order from the light incident side, has (i) a translucent resin layer, a resin base material, a light reflecting layer, an adhesive layer or a pressure-sensitive adhesive layer, and a cellulose resin layer, or the light incident side. (Ii) It relates to the film mirror which has a translucent resin layer, a light reflection layer, a resin base material, an adhesive bond layer or an adhesive layer, and a cellulose resin layer at least.
  • a cellulose-based resin is disposed under the adhesive layer or the pressure-sensitive adhesive layer (on the side opposite to the light incident side).
  • the film mirror in which the adhesive layer and the pressure-sensitive adhesive layer are disposed on the side opposite to the light incident side with respect to the metal reflection layer, the film mirror is the adhesive layer / pressure-sensitive adhesive layer.
  • the weather resistance and light resistance can be further improved, and the regular reflectance can be maintained over a long period of time.
  • the mechanism for exerting the above-described effects by the configuration of the present invention is presumed as follows.
  • the decrease in durability in the technique described in Patent Document 1 described above is that the residual solvent contained in the adhesive layer and the pressure-sensitive adhesive layer foams under an outdoor exposure environment, and the film mirror This is considered to be due to a decrease in flatness and delamination at the interface adjacent to the adhesive layer / adhesive layer.
  • the adhesive layer / adhesive layer since the cellulose-based resin is excellent in solvent permeability, even when the film mirror is exposed to a harsh outdoor environment such as a desert, the adhesive layer / adhesive layer The residual solvent contained in is released from the cellulosic resin layer to the outside without foaming. As a result, the occurrence of problems such as deterioration in flatness and delamination due to foaming without residual solvent being released to the outside is suppressed, and the effect of the present invention of improving durability and maintaining regular reflectance is achieved. It is presumed to be played.
  • the present invention is not limited to such a mechanism.
  • the above-described effect exerted by the film mirror according to the present invention is remarkably exhibited particularly when exposed to a harsh outdoor environment for a long period (for example, 40 days or more, preferably about 20 years).
  • the film mirror which concerns on this invention can be used suitably for the reflective apparatus for solar thermal power generation.
  • X to Y indicating a range means “X or more and Y or less”. Unless otherwise specified, measurement of operation and physical properties is performed under conditions of room temperature (20 to 25 ° C.) / Relative humidity 40 to 50%.
  • FIG. 1 is a schematic cross-sectional view showing an embodiment of the configuration of the film mirror according to the present invention.
  • the film mirror 10 includes, in order from the light incident side, a hard coat layer 4, a translucent resin layer 3, a resin base material (for example, a resin film) 2, and a light reflection layer (for example, silver reflection).
  • Layer) 1 the pressure-sensitive adhesive layer 6 and the cellulose resin layer 7 are laminated.
  • another layer may be interposed between each of the above-mentioned layers, and each layer may be adjacent.
  • the resin base material 2 is disposed on the light incident side with respect to the light reflection layer 1, but the present invention is not limited to this form, and the light reflection layer 1 is the resin base material 2. May be arranged on the light incident side.
  • FIG. 2 is a schematic sectional view showing another embodiment of the configuration of the film mirror of the present invention.
  • the film mirror 10 includes, in order from the light incident side, a hard coat layer 4, a translucent resin layer 3, a light reflecting layer (for example, a silver reflecting layer) 1, a resin base material (for example, a resin).
  • Film) 2 adhesive layer 6 and cellulose resin layer 7 are laminated.
  • another layer may be interposed between each of the above-mentioned layers, and each layer may be adjacent.
  • the light reflection layer 1 does not contact
  • the resin base material 2 is provided between the pressure-sensitive adhesive layer 6 and the light reflecting layer 1, the unevenness of the pressure-sensitive adhesive layer 6 is not reflected on the light reflecting layer 1, and the light reflecting layer 1 with high flatness is obtained. And a higher reflectance can be achieved.
  • the hard coat layer 4 is an arbitrarily provided layer, and the other layers are indispensable layers for the film mirror according to the present invention.
  • the film mirror preferably further has a hard coat layer on the light incident side surface of the translucent resin layer. With this configuration, it is possible to effectively suppress or prevent the film mirror surface from being damaged or contaminated.
  • a light-transmitting resin layer to contain an ultraviolet absorber, it is also possible to prevent an increase in haze due to bleeding of the ultraviolet absorber to the surface.
  • a corrosion prevention layer is disposed between the light reflecting layer 1 and the pressure-sensitive adhesive layer 6; an anchor layer is disposed between the light reflecting layer 1 and the resin substrate 2; A configuration such as a combination of these can be applied.
  • the thickness of the portion excluding the adhesive layer / pressure-sensitive adhesive layer and the cellulose resin layer, which will be described later, is not particularly limited, but is 10 from the viewpoints of prevention of bending, regular reflectance, handling properties, and the like.
  • the thickness is preferably from 500 to 500 ⁇ m, more preferably from 25 to 300 ⁇ m, still more preferably from 50 to 150 ⁇ m.
  • the center line average roughness (Ra) of the outermost surface layer on the light incident side of the film mirror is 3 nm or more and 20 nm or less from the viewpoint of preventing scattering of reflected light and increasing the light collection efficiency.
  • the translucent resin layer is a resin layer made of a resin material having optical transparency, and preferably contains an ultraviolet absorber.
  • the resin material used for the translucent resin layer is not particularly limited, and various conventionally known synthetic resins that can maintain transparency when a thin film is formed can be used.
  • polyesters such as polyethylene terephthalate (PET) and polyethylene naphthalate (PEN), polyethylene, polypropylene, cellophane, and cellulose diacetate, cellulose triacetate (TAC), cellulose acetate butyrate, cellulose acetate propionate (CAP), cellulose Cellulose esters such as acetate phthalate and cellulose nitrate or their derivatives, polyvinylidene chloride, polyvinyl alcohol, polyethylene vinyl alcohol, syndiotactic polystyrene, polycarbonate, norbornene resin, polymethylpentene, polyether ketone, polyimide, polyether sulfone (PES), polysulfones, polyether ketone imide, polyamide, fluorine Fat, nylon, polymethyl methacrylate, acrylic or polyarylates, cyclo
  • the method for forming the translucent resin layer is not particularly limited, and examples thereof include a method by coating.
  • a coating film that becomes a translucent resin layer is applied by a coating method, various conventionally used coating methods such as spray coating, spin coating, and bar coating can be used. That is, the translucent resin layer can be formed by directly applying the material constituting the translucent resin layer on the light incident side surface of the urethane-modified acrylic resin layer.
  • the smoothness of the translucent resin layer can be improved.
  • the center line average roughness (Ra) of the translucent resin layer formed by the coating method can be 3 nm or more and 20 nm or less. In other words, if the center line average roughness satisfies this value, the translucent resin film produced by melt film formation is not a translucent resin layer provided by bonding with an adhesive layer, but the translucent resin film. It can be considered that the conductive resin layer is provided by coating.
  • the center line average roughness (Ra) which is an index of smoothness of the translucent resin layer, can be determined by a measuring method based on JIS B0601-1982.
  • the translucent resin layer may be formed by bonding a film-shaped translucent resin layer through an adhesive layer or an adhesive layer, regardless of the coating method.
  • the thickness (dry film thickness) of the translucent resin layer is not particularly limited, but is preferably 5 to 150 ⁇ m, more preferably 10 to 100 ⁇ m, and particularly preferably 20 to 80 ⁇ m. With such a thickness, sufficient translucency is secured, and the solvent can be sufficiently evaporated by drying during film formation, which is preferable in terms of productivity.
  • a (meth) acrylic material is preferably used as the material for forming the light-transmitting resin layer.
  • the translucent resin layer is formed of a (meth) acrylic material, since the (meth) acrylic material is hard, the plasticizer fine particles are added for the purpose of obtaining an acrylic translucent resin layer that is soft and difficult to break. You may make it contain.
  • the plasticizer include acrylic rubber, butyl rubber and butyl acrylate.
  • the addition amount of the plasticizer is not particularly limited, but is preferably about 10 to 25% by mass with respect to the resin (translucent resin) in consideration of desired flexibility and the like.
  • the translucent resin layer is formed with a methacrylic resin as a main component.
  • 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.
  • a commercially available product may be used as the resin material used for the translucent resin layer such as methacrylic resin.
  • the translucent resin layer preferably contains an ultraviolet absorber, but such an ultraviolet absorber is not particularly limited, and examples thereof include thiazolidone-based, benzotriazole-based, acrylonitrile-based, benzophenone-based, and aminobutadiene. , Triazine, phenyl salicylate, benzoate and other organic UV absorbers, fine powder UV absorbers such as cerium oxide and magnesium oxide, titanium oxide, zinc oxide, iron oxide, etc. Organic ultraviolet absorbers are preferred.
  • organic ultraviolet absorbers for example, JP-A-46-3335, JP-A-55-152776, JP-A-5-197004, JP-A-5-232630, JP-A-5-307232, JP-A-6-2111813, -53427, 8-234364, 8-239368, 9-310667, 10-115898, 10-147777, 10-182621, German Patent No. 19739797A, Europe Japanese Patent No. 711804A and Japanese Patent Publication No. 8-501291, US Patent No. 1,023,859, No. 2,685,512, No. 2,739,888, No. 2,784, No. 087, No. 2,748,021, No. 3,004,896, No. 3,052,636, No.
  • UV absorbers having a molecular weight of 400 or more are less likely to volatilize at a high boiling point and are difficult to disperse even during high temperature molding, so that the weather resistance can be effectively improved with a relatively small amount of addition. it can.
  • the ultraviolet absorber having a molecular weight of 400 or more has little transferability from the thin translucent resin layer 4 to other constituent layers and hardly deposits on the surface of the laminate, the amount of the ultraviolet absorber contained is small. It is preferable from the viewpoints of being maintained for a long time and being excellent in the durability of the weather resistance improving effect.
  • Examples of the ultraviolet absorber having a molecular weight of 400 or more include 2- [2-hydroxy-3,5-bis ( ⁇ , ⁇ -dimethylbenzyl) phenyl] -2-benzotriazole, 2,2-methylenebis [4- (1, 1,3,3-tetrabutyl) -6- (2H-benzotriazol-2-yl) phenol], 2- (2H-benzotriazol-2-yl) -6- (1-methyl-1-phenylethyl)- Benzotriazoles such as 4- (1,1,3,3-tetramethylbutyl) phenol, bis (2,2,6,6-tetramethyl-4-piperidyl) sebacate, bis (1,2,2,6) , 6-pentamethyl-4-piperidyl) sebacate and other hindered amines, and 2- (3,5-di-t-butyl-4-hydroxybenzyl) -2-n-butylmalonate bis (1 , 2,2,6,6-pentamethyl-4-piperidy
  • 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 (in terms of solid content) of the ultraviolet absorber in the translucent resin layer is not particularly limited, but is preferably from 0.1 to 25% by mass, more preferably based on the translucent resin layer. 0.5 to 20% by mass, more preferably 1 to 15% by mass. Further, the content (content per unit area of the film) of the ultraviolet absorber in the translucent resin layer is not particularly limited, but preferably 0.17 to 2.28 g / m 2 , more preferably 0.4. To 2.28 g / m 2 .
  • the light-transmitting resin layer may further contain an antioxidant in order to prevent deterioration.
  • an antioxidant in order to prevent deterioration.
  • it does not restrict
  • the phenol-based antioxidant, the thiol-based antioxidant, and the phosphite-based antioxidant known antioxidants described in International Publication No. 2012/165460, respectively, can be used.
  • resin base material Various conventionally known resin films can be used as the resin base material.
  • PET polyethylene terephthalate
  • polyethylene naphthalate
  • the resin base material may be manufactured by any method, and may be, for example, a film manufactured by melt casting film formation or a film manufactured by solution casting film formation. .
  • the thickness of the resin substrate is not particularly limited, but is preferably an appropriate thickness depending on the type and purpose of the resin.
  • the thickness of the resin substrate is preferably in the range of 10 to 250 ⁇ m, for example, and more preferably 20 to 200 ⁇ m.
  • the light reflecting layer is a layer made of metal or the like having a function of reflecting sunlight.
  • the surface reflectance of the light reflecting layer is preferably 80% or more, more preferably 90% or more.
  • This light reflecting layer is preferably formed of a material containing any element selected from the 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.
  • a light reflecting layer mainly composed of silver is used.
  • the thickness of the light reflecting layer is preferably 10 to 200 nm, more preferably 30 to 150 nm, from the viewpoint of reflectivity and the like.
  • a layer made of a metal oxide such as SiO 2 or TiO 2 may be provided on the light reflecting layer to further improve the reflectance.
  • a wet method or a dry method can be used as a method for forming this light reflecting layer.
  • 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. And 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.
  • the adhesive layer / adhesive layer has adhesiveness / adhesiveness, so that the laminate including the above-described translucent resin layer, resin base material, and light reflection layer is attached to the cellulose resin layer described later. It is a constituent layer that enables
  • the adhesive layer / adhesive layer is more preferably an adhesive layer.
  • the pressure-sensitive adhesive contained in the pressure-sensitive adhesive layer 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 for example, silicone resin, 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 100 ⁇ m from the viewpoints of the pressure-sensitive adhesive effect, the drying speed, and the like.
  • a cellulose resin layer is a layer containing a cellulose resin.
  • a cellulose resin a conventionally known cellulose resin can be used.
  • the cellulose resin include a cellulose ester resin and a cellulose ether resin.
  • Cellulose nanofibers which are fibers (fibers) having an average fiber diameter of nano-order and having cellulose constituent units, may be used as the cellulose-based resin in the present invention.
  • the cellulose ester resin and the cellulose ether resin will be described in detail.
  • cellulose ester resin examples include cellulose triacetate (TAC), cellulose diacetate (DAC), cellulose acetate propionate (CAP), cellulose acetate butyrate, cellulose acetate benzoate, cellulose propionate, and cellulose butyrate.
  • a cellulose ester resin that is particularly preferable is cellulose triacetate (TAC) or cellulose diacetate (DAC).
  • TAC cellulose triacetate
  • DAC cellulose diacetate
  • two or more kinds of cellulose ester resins can be mixed and used.
  • the part which is not substituted by the acyl group of the cellulose skeleton which comprises cellulose-ester resin exists normally as a hydroxyl group. These can be synthesized by known methods.
  • the mass average molecular weight (Mw) of the cellulose ester resin is not particularly limited, but is particularly preferably 75000 or more from the viewpoint of improving brittleness, more preferably in the range of 75,000 to 300,000, and in the range of 100,000 to 24,000. More preferably, it is more preferably from 160000 to 240,000.
  • a cellulose ether resin has an ether bond in the at least 1 substituent of the 2, 3, 6 position in a cellulose molecule.
  • the “ether bond” is a carbon-oxygen-carbon bond.
  • the cellulose ether resin include, but are not limited to, methyl cellulose, ethyl cellulose, carboxymethyl cellulose, carboxymethyl ethyl cellulose, hydroxyethyl cellulose, hydroxyethyl methyl cellulose, and hydroxypropyl methyl cellulose.
  • ethyl cellulose is optimal for ensuring transparency and durability as a film mirror.
  • the degree of ethoxyl substitution is preferably in the range of 1.9 to 2.9, and in the range of 2.2 to 2.9 from the balance between the viscosity at the time of melting and the stability of the moist heat resistant environment. Particularly preferred.
  • the degree of ether substitution can be quantified by the method described in ASTM D4794-94.
  • the molecular weight of the cellulose ether is not particularly limited as long as it can be formed into a film by itself. Specifically, the number average molecular weight Mn may be in the range of 30,000 to 300,000, preferably 50,000 to 200,000. If the molecular weight is 30000 or more, the brittleness of the film is improved, and if it is 300000 or less, the increase in viscosity can be suppressed, and the molding stability during molding can be improved.
  • the cellulose-based resin layer may further contain an additive as long as the above-described cellulose-based resin is a main component.
  • the content of the cellulose resin in the cellulose resin layer is preferably 50% by mass or more, more preferably 80% by mass or more, and further preferably 90% by mass or more.
  • additives that can be contained in the cellulose resin layer include conventionally known plasticizers, antioxidants, matting agents, ultraviolet absorbers, and the like.
  • the hard coat layer is provided for the purpose of preventing damage to the surface of the film mirror and adhesion of dirt.
  • the transparent hard coat layer is preferably provided on the outermost layer on the light incident side, or on the second or third layer from the light incident side.
  • Another thin layer (preferably 1 ⁇ m or less) may be provided on the hard coat layer. More preferably, the hard coat layer is particularly preferably provided on the light incident side surface of the translucent resin layer as shown in FIGS. 1 and 2.
  • Examples of methods for producing the hard coat layer include conventionally known coating methods such as a gravure coating method, a reverse coating method, and a die coating method. In addition to applying and coating a predetermined material, various surface treatments and the like may be combined.
  • 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 from warping while obtaining sufficient scratch resistance. More preferably, they are 1 micrometer or more and 10 micrometers or less.
  • the material for forming the hard coat layer is not particularly limited as long as transparency, weather resistance, hardness, mechanical strength, and the like can be obtained.
  • the hard coat layer can be composed of acrylic resin, urethane resin, melamine resin, epoxy resin, organic silicate compound, silicone resin, or the like.
  • silicone resin and acrylic resin are preferable in terms of hardness and durability.
  • an active energy ray-curable acrylic resin or a thermosetting acrylic resin is preferable, but there is a concern about weather resistance, and the hard coat layer There is a concern that the reflectance will decrease due to the occurrence of discoloration over time and an increase in haze. Therefore, metalloxane (organic silicate compound, silicone resin) is preferably used in terms of high surface protection and weather resistance. That is, the hard coat layer is preferably a metalloxane-based hard coat layer.
  • the active energy ray-curable acrylic resin or 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. Those having an acrylic group bonded to the skeleton may 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.
  • 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 hard coat layer an aqueous colloidal silica-containing acrylic resin (Japanese Patent Laid-Open No. 2005-66824), a polyurethane-based resin composition (Japanese Patent Laid-Open No.
  • Resin film used Japanese Patent Laid-Open No. 2004-142161
  • photocatalytic oxide-containing silica film such as titanium oxide or alumina
  • photocatalytic film such as titanium oxide or niobium oxide having a high aspect ratio
  • photocatalyst Examples thereof include a fluorine-containing resin coating (Pierex Technologies), an organic / inorganic polysilazane film, and a film using a hydrophilization accelerator (AZ Electronics) in organic / inorganic polysilazane.
  • AZ Electronics hydrophilization accelerator
  • thermosetting silicone 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
  • 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. And this is apply
  • a hydrophilic property by subjecting the hard coat layer to a surface treatment.
  • the treatment for imparting hydrophilicity 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), surface fine processing treatment, and the like. Can be mentioned.
  • the hard coat layer is made of an inorganic material
  • silicon oxide, aluminum oxide, silicon nitride, aluminum nitride, lanthanum oxide, lanthanum nitride, or the like can be formed by vacuum film formation.
  • 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 hard coat layer is made of an inorganic material, it is preferably made of a film obtained by coating polysilazane and heat-curing it.
  • the precursor of the hard coat layer contains polysilazane, for example, after applying a solution with a catalyst added to an organic solvent containing polysilazane represented by the following general formula (1) as necessary, the solvent is evaporated. Thereby leaving a polysilazane layer having a layer thickness of 0.05 to 3.0 ⁇ m on the film mirror. Then, a glass-like transparent hard coat film is formed on the film mirror by locally heating the polysilazane layer in the presence of oxygen, active oxygen, and in some cases nitrogen in an atmosphere containing water vapor. It is preferable to adopt the method.
  • R 1 , R 2 and R 3 are the same or different and are independently of each other hydrogen, or an optionally substituted alkyl group, aryl group, vinyl group or (trialkoxysilyl).
  • alkyl group preferably hydrogen, methyl, ethyl, propyl, iso-propyl, butyl, iso-butyl, tert-butyl, phenyl, vinyl or 3- (triethoxysilyl) propyl, 3- (trimethoxysilylpropyl)
  • catalysts preferably basic catalysts, in particular N, N-diethylethanolamine, N, N-dimethylethanolamine, triethanolamine, triethylamine, 3-morpholinopropylamine or N-heterocyclic compounds are used.
  • the catalyst concentration is usually in the range of 0.1 to 10 mol%, preferably 0.5 to 7 mol%, based on polysilazane.
  • a solution containing perhydropolysilazane in which all of R 1 , R 2 and R 3 in the general formula (1) are hydrogen atoms is used.
  • the hard coat layer contains at least one polysilazane represented by the following general formula (2).
  • R 1 , R 2 , R 3 , R 4 , R 5 and R 6 are independently of each other hydrogen, optionally substituted alkyl group, aryl group, vinyl group or ( Represents a trialkoxysilyl) alkyl group;
  • n and p are integers, and in particular, n is determined so that polysilazane has a number average molecular weight of 150 to 150,000 g / mol.
  • R 1 , R 3 and R 6 represent hydrogen and R 2 , R 4 and R 5 represent methyl.
  • the transparent hard coat layer contains at least one polysilazane represented by the following general formula (3).
  • R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 and R 9 are independently of one another hydrogen or optionally substituted alkyl.
  • n, p and q are integers, and in particular, n is determined so that polysilazane has a number average molecular weight of 150 to 150,000 g / mol.
  • R 1 , R 3 and R 6 represent hydrogen and R 2 , R 4 , R 5 and R 8 represent methyl, R 9 represents (triethoxysilyl) propyl and R 7 Is a compound in which represents alkyl or hydrogen.
  • the proportion of polysilazane in the solvent is generally 1 to 80% by mass, preferably 5 to 50% by mass, and particularly preferably 10 to 40% by mass.
  • an organic solvent which does not contain water and a reactive group (for example, a hydroxy group or an amine group) and is inert to polysilazane preferably an aprotic solvent is suitable.
  • aprotic solvent preferably an organic solvent which does not contain water and a reactive group (for example, a hydroxy group or an amine group) and is inert to polysilazane.
  • binders such as those conventionally used in the production of paints can be used.
  • cellulose ethers and cellulose esters such as ethyl cellulose, nitrocellulose, cellulose acetate or cellulose acetobutyrate, natural resins such as rubber or rosin resins, or synthetic resins such as polymerized resins or condensed resins such as aminoplasts, in particular Urea resins and melamine formaldehyde resins, alkyd resins, acrylic resins, polyesters or modified polyesters, epoxides, polyisocyanates or blocked polyisocyanates, or polysiloxanes.
  • an additive that affects the viscosity, wettability of the preparation, film forming property, lubricating action or exhaust property, or inorganic nanoparticles such as SiO 2 TiO 2 , ZnO, ZrO 2 or Al 2 O 3 can be used.
  • the transparent hard coat layer of polysilazane thus formed can also be used as an oxygen / water vapor barrier film.
  • a hard coat layer containing a polyfunctional acrylic monomer and a silicone resin can be given.
  • a 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 1,000 to 10,000 are also 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 polyfunctional acrylic monomer “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 silicone resin contains 1 to 50% by mass of the monomer (a) having a radically polymerizable double bond and a polyorganosiloxane chain, and other than (a) having a radically polymerizable double bond and a reactive functional group.
  • a monomer containing 10 to 95% by mass of the monomer (b) and 0 to 89% by mass of the monomer (c) having a radical polymerizable double bond other than (a) and (b) is polymerized.
  • a vinyl copolymer having a number average molecular weight of 5,000 to 100,000 obtained by reacting the polymer ( ⁇ ) with a functional group capable of reacting with the reactive functional group and a compound ( ⁇ ) having a radical polymerizable double bond.
  • An active energy ray-curable resin that is a coalescence is preferable.
  • 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 Toagosei Co., Ltd., POSS (Polyhydrogen Oligomeric Silsesquioxane) series acrylates 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 polymerization ratio is preferably such that the monomer (a) is 1 to 50% by mass, more preferably 10 to 35% by mass, based on the total mass of monomers constituting the polymer. %.
  • the copolymerization ratio of the “B” component is less than 1% by mass, it becomes difficult to impart antifouling properties and weather resistance to the upper surface of the cured product, and when it exceeds 50% by mass, scratch resistance is obtained.
  • the coating composition performance such as compatibility with other components contained in the active energy ray-curable composition, adhesion to the substrate, toughness, and solubility of the polymer in the solvent are obtained. It becomes difficult.
  • An appropriate amount of polysiloxane can also be contained in the above components, and depending on the chemical structure and quantitative ratio of the “B” component, the durability can be improved by adding polysiloxane.
  • This 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, so the film may be bent or it may be prone to cracking due to lack of flexibility and handling. It becomes difficult. 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 hard coat layer composition.
  • the hard coat layer may contain an ultraviolet absorber or an antioxidant.
  • the ultraviolet absorber or antioxidant the ultraviolet absorber or antioxidant used in the above-described translucent resin layer can be used.
  • the antioxidant used in the hard coat layer it is preferable to use 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.
  • the light stabilizer is not particularly limited, but the same light stabilizer as described in the above-mentioned section of the light transmissive resin layer can be used. Description is omitted.
  • 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 effect of lowering the falling 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 mass that has been 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 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.
  • the 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 initiator or photosensitizer is used in an amount of 0.1 to 15 parts by weight, preferably 1 to 10 parts by weight, more preferably 2 to 5 parts by weight, based on 100 parts by weight of the composition.
  • Two types of initiators can be used in combination.
  • 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.
  • the anchor layer can be disposed between the resin substrate and the light reflecting layer.
  • An anchor layer consists of resin and makes a resin base material and a light reflection layer closely_contact
  • the material (resin material) used for the anchor layer and the method for forming the anchor layer are not particularly limited.
  • publicly known documents such as International Publication No. 2012/165460 (particularly, paragraphs “0209” to “0212”) Materials and methods similar to those described in can be used.
  • the corrosion prevention layer is a resin layer containing a corrosion inhibitor and is preferably adjacent to the light reflection layer. For example, it can be provided between the light reflecting layer and the adhesive / adhesive layer.
  • the corrosion prevention layer may consist of only one layer or a plurality of layers.
  • the thickness of the corrosion prevention layer is preferably 1 to 10 ⁇ m, more preferably 2 to 8 ⁇ m.
  • the resin and corrosion inhibitor used in the corrosion prevention layer are not particularly limited, but are similar to those described in known documents such as International Publication No. 2012/165460 (particularly, paragraphs “0079” to “0095”). Can be used.
  • the corrosion prevention layer can be formed by applying and coating these resin materials (binders) on the light reflection layer or the like.
  • the corrosion inhibitor it is preferable to have 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 0.1 to 1.0 g / m 2 .
  • the gas barrier layer is preferably provided on the light incident side with respect to the light reflecting layer. In particular, it is preferable to provide a gas barrier layer between the resin substrate and the light reflecting layer.
  • the gas barrier layer is intended to prevent the deterioration of humidity, especially the deterioration of the resin base material and each component layer supported by the resin base material due to high humidity, but with special functions and applications. As long as it has a function of preventing deterioration, a gas barrier layer of various modes can be provided.
  • the moisture resistance of the gas barrier layer the water vapor permeability at 40 ° C. and 90% RH is preferably 1 g / m 2 ⁇ day or less, more preferably 0.5 g / m 2 ⁇ day or less, still more preferably It is 0.2 g / m 2 ⁇ day or less.
  • the oxygen permeability of the gas barrier layer is preferably 0.6 ml / m 2 / day / atm or less under the conditions of a measurement temperature of 23 ° C. and a humidity of 90% RH.
  • the material used for the gas barrier layer and the method for forming the gas barrier layer are not particularly limited, but are described in known documents such as International Publication No. 2012/165460 (particularly, paragraphs “0188” to “0209”). Similar materials and methods can be used.
  • a film mirror for solar power generation can be manufactured by appropriately laminating the above-described constituent layers.
  • this invention is not limited to the following form.
  • a resin base material for example, a polyethylene terephthalate film manufactured by melt film formation
  • an anchor layer is formed by applying a predetermined resin material on the resin substrate (after application, drying if necessary).
  • a light reflecting layer for example, a silver reflecting layer
  • a method such as vacuum deposition is used to form the resin substrate (or an anchor layer when an anchor layer is provided on the resin substrate) by a method such as vacuum deposition.
  • a translucent resin layer is formed on the surface of the resin substrate opposite to the surface on which the light reflecting layer is formed.
  • the translucent resin layer can be formed by applying a resin film constituting the layer through an adhesive layer / adhesive layer or by applying a translucent resin layer forming liquid containing a resin material (after application). , Drying if necessary).
  • a hard coat layer coating solution containing a hard coat material is applied onto the thus formed translucent resin layer (after application, dried if necessary, and further cured as necessary).
  • a hard coat layer can be formed.
  • an adhesive material / adhesive material is applied to the back side of the light reflecting layer or the resin base (the side on which the resin base and the light reflecting layer are not formed respectively) to form an adhesive layer / adhesive layer
  • a film mirror is manufactured by sticking a cellulose resin layer to the adhesive layer / adhesive layer.
  • a film is prepared by preparing an adhesive layer / adhesive layer formed on the surface of a cellulose-based resin layer, and affixing the adhesive layer / adhesive layer to the light reflecting layer or the back side of the resin substrate. You may get a mirror.
  • the desired film mirrors are manufactured by laminating the constituent layers necessary for each film mirror in a predetermined order on the resin base material or light reflecting layer.
  • a predetermined resin material an anchor coat layer forming liquid containing a predetermined resin material if necessary
  • Is applied after application, it is dried if necessary
  • a resin material containing a corrosion inhibitor on the light reflection layer if necessary, a predetermined resin material and corrosion.
  • the film mirror has a gas barrier layer
  • the gas barrier layer can be formed by subjecting a predetermined layer to a sol-gel method and heating / UV treatment.
  • the film mirror described above can be used as a constituent member of a solar power generation reflecting device. According to this invention, the following two are assumed as a form in which a film mirror is used for the solar power generation reflective apparatus.
  • the film mirror according to the present invention is usually bonded to the self-supporting support substrate via an adhesive layer / adhesive layer.
  • self-supporting of the support substrate means that the support substrate supports the edge portion of the film mirror in a state of being cut to a size that can be used as a support substrate for a solar power generation reflector. This indicates that the film mirror has sufficient rigidity to be held.
  • the support base material of the solar power generation reflecting device has self-supporting properties, so that it is easy to handle when installing the solar power generation reflecting device, and the holding member for holding the solar power generation reflecting device has a simple configuration. Therefore, it is possible to reduce the weight of the reflection device itself, and it is possible to suppress power consumption during solar tracking.
  • the self-supporting support substrate prepared as a separate component from the film mirror has a pair of metal flat plates and an intermediate layer interposed between the metal flat plates (Type A) or those made of a resin material having a hollow structure (type B) are preferred.
  • Type A metal flat plates
  • type B those made of a resin material having a hollow structure
  • the self-supporting substrate A or the self-supporting substrate B described in International Publication No. 2011/162154 or US Patent Application Publication No. 2013/0114155 is adopted. Can do.
  • the cellulose resin layer does not function as a supporting substrate, and therefore the cellulose resin layer does not need to have self-supporting properties.
  • the thickness of the cellulose resin layer in the form (i) is preferably 20 to 500 ⁇ m, more preferably 50 to 300 ⁇ m.
  • the cellulose resin layer has a self-supporting function, thereby functioning as a support base material for the solar power generation reflecting device.
  • the thickness of the cellulose resin layer in the form (ii) is larger than that in the form (i), preferably 150 to 1000 ⁇ m, and more preferably 200 to 300 ⁇ m.
  • the solar power generation reflection device has a holding member that holds the reflection device itself.
  • the holding member holds the reflecting surface (film mirror) of the solar power generation reflecting device in a state where the sun can be tracked.
  • the form of the holding member is not particularly limited, but for example, a plurality of places on the support base on the back side of the solar power generation reflecting device are formed in a bar shape so that the solar power generating reflection device can hold a desired shape and posture.
  • the form held by a columnar member or a beam-like member is preferable.
  • the holding member has a configuration for holding the solar power generation reflecting device in a state in which the sun can be tracked.
  • the holding member may be driven manually, or a separate driving device may be provided to automatically track the sun. It is good also as composition to do.
  • a corrosion prevention layer 1 an amount adjusted to 0.3 g / m 2 after applying glycol dimercaptoacetate as a corrosion inhibitor was added, and coating was carried out to a thickness of 0.1 ⁇ m by a gravure coating method to obtain a corrosion prevention layer 1. Further, a water-dispersed emulsion type benzotriazole polymer type UV absorbing coating solution UVA-1383MG (manufactured by BASF) is coated by a gravure coating method, dried at 55 ° C. for 4 minutes, and a corrosion prevention layer having a thickness of 3 ⁇ m. 2 was formed. Corrosion prevention layers 1 and 2 were combined to form a corrosion prevention layer.
  • the pressure-sensitive adhesive layer side of a transparent acrylic film (manufactured by Mitsubishi Rayon, Acryprene HBS010P, thickness 100 ⁇ m; equivalent to “translucent resin layer”) is formed on the above-mentioned corrosion prevention layer by a dry lamination process. Were laminated at a laminating temperature of 60 ° C.
  • a diacetyl cellulose (DAC) film having a thickness of 30 ⁇ m was used as a supporting substrate.
  • 100 parts of an addition reaction type silicone pressure-sensitive adhesive having a mass average molecular weight of 500,000 was added with 1 part of a platinum catalyst to form a 35 mass% toluene solution, which was applied to one side of the diacetylcellulose film, and 5 ° C. at 110 ° C.
  • the laminate was obtained by heating for 25 minutes to form a silicone adhesive layer (Si system) having a thickness of 25 ⁇ m. Thereafter, the silicone-based adhesive layer side of the laminate was laminated on the opposite side of the PET film from the corrosion prevention layer and the silver reflection layer to produce a solar thermal power generation reflection device 1.
  • a solar power generation reflection device 2 was manufactured in the same manner as the solar power generation reflection device 1 except that a 400 ⁇ m-thick diacetylcellulose (DAC) film was used as the support substrate.
  • DAC diacetylcellulose
  • a solar power generation reflecting device 3 was manufactured in the same manner as the solar power generation reflecting device 1 except that a triacetyl cellulose (TAC) film having a thickness of 30 ⁇ m was used as the support substrate.
  • TAC triacetyl cellulose
  • the solar power generation reflective device 4 was manufactured in the same manner as the solar power generation reflection device 1 except that a 400 ⁇ m thick triacetylcellulose (TAC) film was used as the support substrate.
  • TAC triacetylcellulose
  • a solar power generation reflecting device 5 was prepared in the same manner as the solar power generation reflecting device 1 except that a 50 ⁇ m thick triacetylcellulose (TAC) film was used as the support substrate.
  • TAC triacetylcellulose
  • a solar power generation reflection device 6 was prepared in the same manner as the solar power generation reflection device 1 except that a 200 ⁇ m thick triacetylcellulose (TAC) film was used as the support substrate.
  • TAC triacetylcellulose
  • a solar power generation reflection device 7 was manufactured in the same manner as the solar power generation reflection device 1 except that a 300 ⁇ m thick triacetylcellulose (TAC) film was used as the support substrate.
  • TAC triacetylcellulose
  • a hard coat layer coating solution having the following composition is prepared, and the coating solution is cured on the translucent resin layer so that the layer thickness after curing is 3 ⁇ m. It was applied using a micro gravure coater, and after evaporating and drying the solvent, it was cured by ultraviolet irradiation at 0.2 J / cm 2 using a high-pressure mercury lamp to form a hard coat layer. Thereby, a hard-coat layer is laminated
  • ⁇ Coating liquid for hard coat layer Dipentaerythritol hexaacrylate 70 parts by weight Trimethylolpropane triacrylate 30 parts by weight Photoinitiator (Irgacure 184 (manufactured by BASF Japan)) 4 parts by weight Ethyl acetate 150 parts by weight Propylene glycol monomethyl ether 150 parts by weight Metalloxane-based silicon compound ( BYK-307 (manufactured by Big Chemie Japan Co., Ltd.)) 0.4 parts by mass
  • the above solar heat except that the hard coat layer formed on the translucent resin layer as described above was bonded to the supporting substrate.
  • the solar power generation reflection device 8 was manufactured in the same manner as the generation of the power generation reflection device 6.
  • a solar thermal power generation reflector 9 was prepared in the same manner as the solar power generator reflector 8 except that a 300 ⁇ m thick triacetylcellulose (TAC) film was used as the support substrate.
  • TAC triacetylcellulose
  • the solar power generation reflector 10 is the same as the solar power generation reflector 8 except that a biaxially stretched polyester film (polyethylene naphthalate (PEN) film, thickness 25 ⁇ m) is used as the resin substrate.
  • PEN polyethylene naphthalate
  • a solar power generation reflection device 11 was prepared in the same manner as the solar power generation reflection device 8 except that a polyvinyl chloride (PVC) film having a thickness of 200 ⁇ m was used as the support substrate.
  • PVC polyvinyl chloride
  • a solar thermal power generation reflection device 12 was manufactured in the same manner as the solar power generation reflection device 8 except that a 200 ⁇ m-thick polymethylmethacrylate (PMMA) film was used as the support substrate.
  • PMMA polymethylmethacrylate
  • a solar power generation reflection device 13 was manufactured in the same manner as the solar power generation reflection device 8 except that a polyethylene terephthalate (PET) film having a thickness of 200 ⁇ m was used as the support substrate.
  • PET polyethylene terephthalate
  • a solar thermal power generation reflection device 14 was manufactured in the same manner as the solar power generation reflection device 8 except that an aluminum plate having a thickness of 1.5 mm was used as the support substrate.
  • the regular reflectance of each solar power generation reflector was measured before and after the cycle test, and the amount of decrease in regular reflectance before and after the cycle test was calculated. The results are shown in Table 1 below.
  • the specular reflectance of the solar power generation reflector is measured as a relative reflectance measurement with respect to a reference sample having an incident angle of 5 degrees using a spectrophotometer U-4100 (solid sample measurement system, manufactured by Hitachi High-Technologies Corporation). went.
  • the wavelength range was measured at 250 to 2500 nm, and the average reflectance of each wavelength was taken as the regular reflectance.
  • Film peeling is 0 square 4: Film peeling is 1 square or more and 5 squares or less 3: Film peeling is 6 square or more and 10 squares or less 2: Film peeling is 11 square or more and 14 squares or less 1: Film peeling is 15 squares or more (Hard Evaluation of appearance of coat layer) About each solar power generation reflective apparatus after the said cycle test, generation
  • the film mirrors 8 to 10 of the present invention having a hard coat layer maintain good appearance after the weather resistance test / light resistance test.

Landscapes

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

Abstract

La présente invention vise à proposer un moyen pour améliorer davantage la résistance aux intempéries et la résistance à la lumière d'un miroir à film, une couche adhésive ou une couche d'agent de liaison étant agencée sur le côté opposé au côté d'incidence de lumière par rapport à une couche réfléchissante métallique, ledit moyen permettant au miroir à film de maintenir une réflectance spéculaire pendant une longue période temporelle. À cet effet, la présente invention porte sur un miroir à film qui est caractérisé en ce qu'il comprend en séquence depuis le côté d'incidence de lumière, au moins une couche de résine de transmission de lumière, une base de résine, une couche de réflexion de lumière, une couche adhésive ou une couche d'agent de liaison, et une couche de résine de cellulose, ou en variante comprenant, en séquence depuis le côté d'incidence de lumière, au moins une couche de résine de transmission de lumière, une couche de réflexion de lumière, une base de résine, une couche adhésive ou une couche d'agent de liaison et une couche de résine de cellulose.
PCT/JP2014/083301 2013-12-25 2014-12-16 Miroir à film et dispositif réfléchissant pour génération de puissance thermique solaire l'utilisant WO2015098627A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2013-267310 2013-12-25
JP2013267310A JP2017040669A (ja) 2013-12-25 2013-12-25 フィルムミラーおよびこれを用いた太陽熱発電用反射装置

Publications (1)

Publication Number Publication Date
WO2015098627A1 true WO2015098627A1 (fr) 2015-07-02

Family

ID=53478491

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2014/083301 WO2015098627A1 (fr) 2013-12-25 2014-12-16 Miroir à film et dispositif réfléchissant pour génération de puissance thermique solaire l'utilisant

Country Status (2)

Country Link
JP (1) JP2017040669A (fr)
WO (1) WO2015098627A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011215445A (ja) * 2010-04-01 2011-10-27 Konica Minolta Opto Inc 太陽熱発電用反射装置
JP2012137546A (ja) * 2010-12-24 2012-07-19 Dainippon Printing Co Ltd 光学フィルム、偏光板及び画像表示装置
JP2012181301A (ja) * 2011-03-01 2012-09-20 Konica Minolta Advanced Layers Inc フィルムミラーの製造方法、フィルムミラー及び太陽熱発電用反射装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011215445A (ja) * 2010-04-01 2011-10-27 Konica Minolta Opto Inc 太陽熱発電用反射装置
JP2012137546A (ja) * 2010-12-24 2012-07-19 Dainippon Printing Co Ltd 光学フィルム、偏光板及び画像表示装置
JP2012181301A (ja) * 2011-03-01 2012-09-20 Konica Minolta Advanced Layers Inc フィルムミラーの製造方法、フィルムミラー及び太陽熱発電用反射装置

Also Published As

Publication number Publication date
JP2017040669A (ja) 2017-02-23

Similar Documents

Publication Publication Date Title
WO2012133517A1 (fr) Miroir et dispositif réfléchissant permettant de produire de l'énergie solaire
JP5741586B2 (ja) 太陽熱発電用フィルムミラー、太陽熱発電用フィルムミラーの製造方法及び太陽熱発電用反射装置
WO2012090987A1 (fr) Pellicule fonctionnelle, miroir pelliculaire et dispositif réfléchissant permettant de produire une puissance thermique solaire
KR101272984B1 (ko) 내마모성 및 내오염성이 우수한 눈부심 방지 코팅 조성물 및 눈부심 방지 코팅 필름
JP4742825B2 (ja) 積層体の製造方法
WO2012165460A1 (fr) Dispositif réfléchissant pour la génération d'énergie thermique solaire, miroir pelliculaire, et procédé de fabrication de miroir pelliculaire
JP5691811B2 (ja) フィルムミラー、太陽光反射用ミラー及び太陽熱発電用反射装置
JP2006231316A (ja) 積層体の製造方法
WO2013094633A1 (fr) Miroir à film pour réfléchir la lumière solaire et dispositif réfléchissant pour produire de l'énergie solaire
JP2007076297A (ja) 光学物品の表面コート用積層体
JP2006231317A (ja) 積層体の製造方法
JP2006257379A (ja) 硬化性樹脂組成物、それからなる硬化膜及び積層体
KR101220567B1 (ko) 경화성 수지 조성물 및 이를 포함하는 경화막 및 적층체
KR101213367B1 (ko) 경화성 수지 조성물, 이를 포함하는 경화막 및 적층체
JP5672071B2 (ja) フィルムミラーの製造方法、フィルムミラー及び太陽熱発電用反射装置
WO2012057003A1 (fr) Miroir à film pour la production d'énergie solaire et dispositif de réflexion pour la production d'énergie solaire
WO2014061497A1 (fr) Miroir à film et appareil réfléchissant pour génération d'énergie thermique solaire
WO2015098627A1 (fr) Miroir à film et dispositif réfléchissant pour génération de puissance thermique solaire l'utilisant
JPWO2014061497A6 (ja) フィルムミラー及び太陽熱発電用反射装置
JP2006231900A (ja) 積層体の製造方法
JPWO2012043606A1 (ja) 太陽熱発電用フィルムミラー、太陽熱発電用フィルムミラーの製造方法及び太陽熱発電用反射装置
CN111741999B (zh) 含有功能性微粒的带硬涂层的基材的制造方法
WO2015079803A1 (fr) Miroir à couches
JP2016057419A (ja) 太陽光反射ミラー及び太陽熱発電用反射装置
WO2013054869A1 (fr) Miroir pour réflexion de lumière solaire, et dispositif de réflexion pour génération d'énergie thermique solaire

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 14873627

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 14873627

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP