WO2015122337A1 - Miroir à film, et dispositif de réflexion pour la génération d'énergie solaire - Google Patents

Miroir à film, et dispositif de réflexion pour la génération d'énergie solaire Download PDF

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Publication number
WO2015122337A1
WO2015122337A1 PCT/JP2015/053146 JP2015053146W WO2015122337A1 WO 2015122337 A1 WO2015122337 A1 WO 2015122337A1 JP 2015053146 W JP2015053146 W JP 2015053146W WO 2015122337 A1 WO2015122337 A1 WO 2015122337A1
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layer
resin
hard coat
film mirror
film
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PCT/JP2015/053146
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English (en)
Japanese (ja)
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治加 増田
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コニカミノルタ株式会社
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/08—Mirrors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
    • F24S23/70—Arrangements for concentrating solar-rays for solar heat collectors with reflectors
    • F24S23/82—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
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G02B1/14—Protective coatings, e.g. hard coatings
    • 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 energy as an 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.
  • a glass mirror Since the light collecting device is exposed to ultraviolet rays, heat, wind and rain, sand storms, etc. by sunlight, conventionally, a glass mirror has been used for the light collecting device. Glass mirrors are highly durable to the environment, but they can be damaged during transportation, and the weight of the glass mirrors can increase the strength of the frame on which the mirrors are installed, which increases plant construction costs. was there.
  • International Publication No. 2011/096309 includes a resin base material, a silver reflective layer thereon, and a metalloxane skeleton on the outermost side on the light source side of the silver reflective layer
  • a film mirror that has an outermost layer made of a material having a contact angle of water and a coefficient of dynamic friction of the outermost layer made of a material having a metalloxane skeleton.
  • an object of the present invention is to provide a film mirror having excellent surface scratch resistance.
  • the present inventor conducted extensive research. As a result, it has been found that the above problem can be solved by a film mirror in which a hard coat adjacent layer having a Young's modulus in a specific range is provided adjacent to the outermost hard coat layer on the light incident side.
  • the invention has been completed.
  • the above-described problem of the present invention includes a resin base material and a light reflection layer, a hard coat layer located closest to the light incident side, and a hard coat adjacent layer provided adjacent to the hard coat layer, This is achieved by a film mirror in which the Young's modulus of the coat adjacent layer is 0.01 GPa or more and 1.0 GPa or less.
  • FIG. 10 It is a schematic sectional drawing which shows an example of a structure of the film mirror of this invention, 10 is a film mirror, 11 is a hard-coat layer, 12 is a hard-coat adjacent layer, 13 is a resin base material, 14 Is a light reflection layer, 15 is a resin coat layer (corrosion prevention layer), and 16 is an adhesive layer.
  • the present invention has a resin base material and a light reflection layer, a hard coat layer located closest to the light incident side, and a hard coat adjacent layer provided adjacent to the hard coat layer, and the hard coat adjacent layer
  • This film mirror has a Young's modulus of 0.01 GPa or more and 1.0 GPa or less.
  • the film mirror having such a configuration is excellent in surface scratch resistance (sandblast resistance).
  • film mirrors are installed outdoors, especially in vast deserts, they are frequently exposed to sandstorms. Therefore, the surface of the film mirror is damaged when fine particles such as sand collide at high speed. And the reflected light will be scattered by the damage
  • the film mirror of the present invention includes a hard coat adjacent layer having a Young's modulus of 0.01 GPa or more and 1.0 GPa or less adjacent to the hard coat layer provided on the outermost surface on the light incident side. .
  • scratch resistance sandblast resistance
  • the mechanism of improving the scratch resistance (sandblast resistance) is considered to be because the soft hard coat adjacent layer absorbs the impact of collision of particles such as sand. Moreover, this can suppress the fall of regular reflectance, and can prevent the fall of condensing efficiency.
  • X to Y indicating a range means “X or more and Y or less”.
  • operations and physical properties are measured under conditions of room temperature (20 to 25 ° C.) / Relative humidity 40 to 50% RH.
  • FIG. 1 is a diagram schematically showing a cross section of a film mirror according to an embodiment of the present invention.
  • the film mirror 10 shown in FIG. 1 has a hard coat layer 11, a hard coat adjacent layer 12, a resin base material 13, a light reflecting layer 14, a resin coat layer (corrosion prevention layer) 15, and an adhesive layer 16 in this order from the light incident side. Has been.
  • the total thickness of the film mirror according to the present invention is preferably from 80 to 300 ⁇ m, more preferably from 80 to 200 ⁇ m, and even more preferably from 80 to 170 ⁇ m from the viewpoints of prevention of bending, regular reflectance, handling properties, and the like.
  • the outermost surface layer on the light incident side of the film mirror, that is, the center line average roughness (Ra) of the hard coat layer is 3 nm or more and 20 nm or less, so that scattering of reflected light can be prevented and light collection efficiency is improved. It is preferable from the viewpoint.
  • the film containing conventionally well-known various resin can be used as a resin base material.
  • the resin include, for example, polycarbonate, polyarylate, polysulfone, polyethersulfone, polyethylene terephthalate, polyethylene naphthalate, polyester such as modified polyester, polyethylene, polypropylene, cellulose, diacetylcellulose, triacetylcellulose, cellulose acetate propionate.
  • the resin base material may have a single layer structure or a multilayer structure of two or more layers.
  • the resin contained in each layer may be the same or different.
  • the resin substrate may be a film manufactured by melt casting film formation or a film manufactured by solution casting film formation.
  • the resin substrate may be an unstretched film or a stretched film.
  • the resin substrate When the resin substrate is located farther from the light incident side than the light reflecting layer, it is difficult for ultraviolet rays to reach the resin substrate.
  • an ultraviolet absorber when an ultraviolet absorber is contained in a layer or the like closer to the light incident side than the resin base material, the ultraviolet light hardly reaches the resin base material. Therefore, the resin base material 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 base material.
  • the resin substrate may contain an ultraviolet absorber.
  • an ultraviolet absorber is not particularly limited, and examples of the organic type include ultraviolet absorbers such as benzophenone type, benzotriazole type, phenyl salicylate type, triazine type, benzoate type, etc. Examples thereof include titanium oxide, zinc oxide, cerium oxide, and iron oxide.
  • a polymeric ultraviolet absorber having a molecular weight of 1000 or more.
  • the molecular weight is 1000 or more and 3000 or less.
  • These ultraviolet absorbers can be used alone or in combination of two or more.
  • the compounds described in paragraphs “0038” to “0042” of JP2012-232538A can be used.
  • the thickness of the resin base material can be appropriately selected according to the type and purpose of the resin. For example, it is generally in the range of 10 to 250 ⁇ m, preferably 20 to 200 ⁇ m.
  • the light reflecting layer 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 light reflection layer is preferably 80% or more, more preferably 90% or more.
  • the light reflecting layer is preferably formed of a material containing at least one element selected from the element group consisting of aluminum, silver, chromium, copper, nickel, titanium, magnesium, rhodium, platinum and gold.
  • aluminum or silver is preferably the main component from the viewpoint of reflectance, corrosion resistance, etc., more preferably aluminum or silver, and particularly preferably silver.
  • Two or more such metal thin films may be formed. Further, a layer made of a metal oxide such as SiO 2 and TiO 2 may be provided in this order on the light reflecting layer to further improve the reflectance.
  • a metal oxide such as SiO 2 and TiO 2
  • a wet method or a dry method can be used as a method for forming the light reflecting layer according to the present invention.
  • the wet method is a general term for a plating method, and is a method of forming a film by depositing a metal from a solution. Specific examples include silver mirror reaction.
  • the dry method is a general term for a vacuum film forming method, 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.
  • Etc As a manufacturing method of the film mirror of this invention, it is preferable to form a light reflection layer by a vapor deposition method.
  • the light reflecting layer is preferably formed on a resin film.
  • the resin film include, for example, polyesters such as polycarbonate, polyarylate, polysulfone, polyethersulfone, polyethylene terephthalate, and polyethylene naphthalate, polyethylene, polypropylene, cellulose, diacetylcellulose, triacetylcellulose, and cellulose acetate propio.
  • the resin contained in each layer may be the same or different.
  • the resin film may be an unstretched film or a stretched film.
  • the resin film may be a resin substrate constituting the film mirror of the present invention. That is, a light reflection layer may be formed on the resin base material described above by a dry method to form the resin base material and the light reflection layer according to the present invention.
  • 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.
  • the light reflecting layer is made of silver
  • the light reflecting layer is formed by heating and baking a coating film containing a silver complex compound from which a ligand can be vaporized / desorbed. May be.
  • “Silver complex compound having a ligand that can be vaporized / desorbed” has a ligand for stably dissolving silver in a solution, but the ligand is removed by removing the solvent and heating and firing. Is a silver complex compound that can be thermally decomposed into CO 2 or a low molecular weight amine compound, vaporized / desorbed, and only metallic silver remains.
  • the silver complex compound is contained in the silver coating liquid composition, and a coating film containing the complex according to the present invention is formed on the resin film by coating the silver complex compound. That is, it is preferable to form a silver reflective layer by forming a coating film on a resin film using a silver complex compound and then baking the coating film at a temperature in the range of 80 to 250 ° C. More preferably, it is within the range of 100 to 220 ° C, and further preferably within the range of 120 to 200 ° C. There is no restriction
  • the light reflecting layer may be on the light incident side with respect to the resin base material, or may be on the side opposite to the light incident side.
  • the hard coat layer is provided on the outermost surface on the light incident side for the purpose of preventing the film mirror surface from being damaged or adhering to the surface.
  • the thickness of the hard coat layer is preferably 0.05 to 10 ⁇ m, preferably 1 to 10 ⁇ m, from the viewpoint of preventing the film mirror from warping while obtaining sufficient scratch resistance. More preferred.
  • 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.
  • resin materials such as acrylic resin, urethane resin, melamine resin, epoxy resin, organic silicate compound, and silicone resin; inorganic such as silicon oxide, aluminum oxide, silicon nitride, aluminum nitride, lanthanum oxide, lanthanum nitride, and polysilazane It can be composed of materials and the like.
  • silicone resin and acrylic resin are preferable in terms of hardness and durability.
  • what consists of an active energy ray hardening-type acrylic resin or a thermosetting type acrylic resin is preferable at the point of sclerosis
  • 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.
  • the active energy ray curable acrylic resin and the thermosetting acrylic resin are included in the hard coat layer in the form of a cured product after the curing treatment.
  • Acrylic oligomers include polyester acrylates, urethane acrylates, epoxy acrylates, polyether acrylates, etc., including those in which a reactive acrylic group is bonded to an acrylic resin skeleton, and rigid materials such as melamine and isocyanuric acid. A structure in which an acrylic group is bonded to a simple skeleton can also be used.
  • the reactive diluent has a function of a solvent in the coating process as a medium of the coating agent, and has a group that itself reacts with a monofunctional or polyfunctional acrylic oligomer. It becomes a copolymerization component.
  • polyfunctional acrylic cured paints are manufactured by Mitsubishi Rayon Co., Ltd. (trade name “Diabeam (registered trademark)” series, etc.), Nagase Sangyo Co., Ltd. (trade name “Denacol (registered trademark)” Series, etc.), Shin-Nakamura Chemical Co., Ltd .; (trade name “NK Ester” series, etc.), DIC Corporation; (trade name “UNIDIC®” series, etc.), Toagosei Co., Ltd. (trade name) "Aronix (registered trademark)” series, etc.), manufactured by NOF Corporation; (trade name “Blemmer (registered trademark)” series, etc.), Nippon Kayaku Co., Ltd. (trade name "KAYARAD (registered trademark)” series, etc.) , Kyoeisha Chemical Co., Ltd .; (product name “light ester” series, “light acrylate” series, etc.) can be used.
  • thermosetting resin a resin curable by electron beam or ultraviolet irradiation, a thermosetting resin, or the like
  • a thermosetting silicone hard coat material composed of a partially hydrolyzed oligomer of an alkoxysilane compound
  • a hard coat material composed of a thermosetting polysiloxane resin, an ultraviolet curable acrylic hard coat material composed of an acrylic compound having an unsaturated group, or a thermosetting inorganic material is preferred.
  • 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
  • photocatalytic film such as alumina, titanium oxide or niobium oxide having a high aspect ratio
  • Photocatalyst-containing fluororesin coating material Pierex Technologies Co., Ltd.
  • organic / inorganic polysilazane film organic / inorganic polysilazane using a hydrophilization promoter
  • AZ Electronics Materials Co., Ltd. etc. it can.
  • Resins that are cured by irradiation with electron beams or ultraviolet rays or thermosetting resins are included in the hard coat layer in the form of a cured product after being subjected to a curing treatment.
  • various additives can be further blended as necessary within the range where the effects of the present invention are not impaired.
  • stabilizers such as antioxidants, light stabilizers, ultraviolet absorbers, surfactants, leveling agents, antistatic agents, and the like can be used.
  • the dynamic friction coefficient of the hard coat layer is preferably 0.4 or less, and more preferably 0.25 or less. Within this range, the scratch resistance (sandblast resistance) of the film mirror surface is further improved.
  • the dynamic friction coefficient can be controlled by controlling the material for forming the hard coat layer, the addition of particles, the addition of a surfactant, and the like. Moreover, this dynamic friction coefficient can be measured by the method as described in an Example.
  • the center line average roughness (Ra) of the hard coat layer is preferably 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 centerline average roughness (Ra) can be determined by a measurement method based on JIS B0601: 1982.
  • the film mirror of the present invention has a hard coat adjacent layer adjacent to the hard coat layer on the side opposite to the light incident side of the hard coat layer.
  • the Young's modulus of the hard coat adjacent layer is 0.01 GPa or more and 1.0 GPa or less. By providing the hard coat adjacent layer having such a Young's modulus, the film mirror of the present invention is excellent in scratch resistance (sandblast resistance).
  • the resin material used for the hard coat adjacent 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 and polyethylene naphthalate, polyethylene esters, polyethylene, polypropylene, cellophane, cellulose diacetate, cellulose triacetate, cellulose acetate butyrate, cellulose acetate propionate, cellulose esters such as cellulose acetate phthalate, cellulose nitrate, or the like
  • These resin materials can be used alone or in combination of two or more. These resin materials may be commercially available products or synthetic products. Examples of commercially available products include: Nippon Synthetic Chemical Industry Co., Ltd .; Polyester (registered trademark) series (LP-033, LP-035, LP-050, etc.), Mitsubishi Rayon Co., Ltd .; EMB457, JSR Co., Ltd .; Products such as Arton (registered trademark), Mitsui Chemicals, Inc .; Apel (registered trademark) can be used. Among these resin materials, polyester and acrylic resin are preferable. The content of the resin material in the hard coat adjacent layer is preferably 60 to 100% by mass with respect to the mass of the entire hard coat adjacent layer.
  • the hard coat adjacent layer may contain a fluorine-based surface modifier.
  • a fluorine-based surface modifier By including the fluorine-based surface modifier, there is an advantage that the dynamic friction coefficient of the hard coat layer can be controlled.
  • the fluorine-based surface modifier a commercially available product or a synthetic product may be used. Examples of commercially available products include Megafac (registered trademark) RS-76E, F-552, F-554 (manufactured by DIC Corporation), and the like. These fluorine-based surface modifiers can be used alone or in admixture of two or more.
  • the addition amount of the fluorine-based surface modifier is not particularly limited, but is preferably 0.03 to 1% by mass with respect to the resin material contained in the hard coat adjacent layer.
  • the hard coat adjacent layer may contain fine particles.
  • the fine particles contained in the hard coat adjacent layer include metal powders such as gold, silver, nickel, copper, lead, aluminum, iron powder, iron oxide, and iron sand; aluminum oxide, zinc oxide, magnesium oxide, silicon oxide (silica) ), Silicate, aluminum nitride, boron nitride, silicon nitride, aluminum hydroxide, magnesium hydroxide, metal compound particles with aluminum oxynitride; polyolefin resin such as polyethylene and polypropylene; (meth) acryl such as polymethyl methacrylate And particles made of a resin such as a resin, an epoxy resin, or a polyimide resin. These fine particles can be used alone or in combination of two or more. Of these, silica and acrylic particles are preferable.
  • the hard coat adjacent layer may contain an ultraviolet absorber in order to prevent deterioration due to ultraviolet rays.
  • an ultraviolet absorber such as thiazolidone, benzotriazole, acrylonitrile, benzophenone, aminobutadiene, triazine, phenyl salicylate, benzoate, etc.
  • fine powder type ultraviolet blocking agents such as cerium oxide and magnesium oxide, titanium oxide, zinc oxide, iron oxide and the like can be mentioned, and organic ultraviolet absorbers are particularly preferable.
  • the hard coat adjacent layer may contain an antioxidant in order to prevent deterioration.
  • the antioxidant is not particularly limited, and examples thereof include phenolic antioxidants, hindered amine antioxidants, thiol antioxidants, and phosphite antioxidants. More specifically, compounds described in paragraphs “0048” to “0052” of JP2012-232538A can be used.
  • the antioxidant and the light stabilizer may be used in combination.
  • the light stabilizer include nickel-based ultraviolet light stabilizers. More specifically, compounds described in paragraph “0053” of JP2012-232538A can be used.
  • an antistatic agent to the hard coat adjacent layer to impart antistatic performance.
  • additives such as a surfactant, a leveling agent and an antistatic agent can be added to the hard coat adjacent layer as long as the effects of the present invention are not impaired.
  • the method for forming the hard coat adjacent layer is not particularly limited. For example, after preparing the coating liquid for forming the hard coat adjacent layer by mixing the above resin material, fine particles and other components as required in an organic solvent. And a method of applying and drying the coating solution. As a specific method of coating, various conventionally used coating methods such as spray coating, spin coating, bar coating, gravure coating, reverse coating, and die coating can be used.
  • organic solvent used in the coating solution examples include methyl acetate, ethyl acetate, propyl acetate, isopropyl acetate, butyl acetate, methyl propionate, ethyl propionate, butyl propionate, methyl lactate, ethyl lactate, butyl lactate, 3- Esters such as methyl methoxypropionate, ethyl 3-methoxypropionate, methyl 3-ethoxypropionate, ethyl 3-ethoxypropionate, methyl acetoacetate and ethyl acetoacetate; ketones such as acetone, methyl ethyl ketone, methyl isobutyl ketone and cyclohexanone Aromatic hydrocarbons such as benzene, toluene, xylene and ethylbenzene; Aliphatic hydrocarbons such as hexane, cyclohexane and octan
  • the smoothness of the hard coat adjacent layer can be improved.
  • the center line average roughness (Ra) of the hard coat adjacent layer formed by the coating method is preferably 3 nm or more and 20 nm or less. In other words, if the center line average roughness satisfies this value, it can be considered that the hard coat adjacent layer, not the hard coat adjacent layer produced by melt film formation, is provided by coating.
  • the thickness (dry film thickness) of the hard coat adjacent layer is not particularly limited, but is preferably 5 to 150 ⁇ m, more preferably 10 to 100 ⁇ m, and further preferably 20 to 80 ⁇ m. If it is such thickness, sufficient translucency can be ensured, and a solvent can fully evaporate by drying at the time of film formation, and it is preferable from a viewpoint of productivity.
  • the Young's modulus of the hard coat adjacent layer is 0.01 GPa or more and 1.0 GPa or less. When the Young's modulus is smaller than 0.01 GPa or larger than 1.0 GPa, the scratch resistance (sandblast resistance) of the film mirror surface is lowered.
  • the Young's modulus is preferably 0.1 GPa or more and 1.0 GPa or less, and more preferably 0.4 GPa or more and 1.0 GPa or less.
  • the Young's modulus of the hard coat adjacent layer can be controlled by controlling the type of resin material, the type and addition amount of the surfactant, and the type and addition amount of the fine particles.
  • the Young's modulus of the hard coat adjacent layer can be measured by the method described in the examples.
  • the film mirror of the present invention may have various layers such as an adhesive layer, a resin coat layer, a gas barrier layer, an anchor layer, an adhesive layer, and a release layer as necessary.
  • these layers will be described.
  • the adhesive layer 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 adhering the hard coat layer and the resin coat layer. Adhesive layer has adhesion to adhere layers, heat resistance that can withstand heat when forming light reflection layer by vacuum deposition method, etc., and smoothness to bring out high reflection performance inherent to light reflection layer It is preferable to have.
  • the adhesive layer may consist of only one layer or may consist of a plurality of layers.
  • the thickness of the adhesive layer 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 material is not particularly limited, and a single material such as polyester resin, polyurethane resin, acrylic resin, melamine resin, epoxy resin, polyamide resin, polyvinyl chloride, vinyl chloride-vinyl acetate copolymer resin, etc.
  • these mixed resins can be used.
  • a mixed resin of a polyester resin and a melamine resin or a mixed resin of a polyester resin and a urethane 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. This is more preferable.
  • a method for forming the adhesive layer conventionally known coating methods such as a gravure coating method, a reverse coating method, and a die coating method can be used.
  • the adhesive layer when it is made of a metal oxide, it can be formed by various vacuum film forming methods such as silicon oxide, aluminum oxide, silicon nitride, aluminum nitride, lanthanum oxide, and lanthanum nitride.
  • various vacuum film forming methods such as silicon oxide, aluminum oxide, silicon nitride, aluminum nitride, lanthanum oxide, and lanthanum nitride.
  • the film mirror of the present invention may have a resin coat layer (corrosion prevention layer) so as to be adjacent to the light reflection layer.
  • the resin coat layer preferably contains a corrosion inhibitor so as to prevent corrosion of the light reflecting layer.
  • the resin coat layer may consist of only one layer or a plurality of layers.
  • the thickness of the resin coat layer is preferably 1 to 10 ⁇ m, more preferably 2 to 8 ⁇ m.
  • binder for the resin coating layer examples include cellulose esters, polycarbonates, polyarylate, polysulfone (including polyethersulfone), polyethylene terephthalate, polyethylene naphthalate and other polyesters, polyethylene, polypropylene, cellophane, cellulose diacetate, cellulose triacetate, Cellulose acetate propionate, cellulose acetate butyrate, polyvinylidene chloride, polyvinyl alcohol, ethylene-vinyl alcohol copolymer, syndiotactic polystyrene, polycarbonate, polynorbornene, polymethylpentene, polyether ketone, polyether ketone imide, polyamide Fluorine resin, nylon, polymethyl methacrylate, or acrylic resin It can gel. Among these, an acrylic resin is preferable. Further, the resin coat layer may contain a curing agent such as 2.4-tolylene diisocyanate. When the curing agent is included, the resin coat layer includes a cured product of the cu
  • corrosion inhibitor As a corrosion inhibitor, it is preferable to have an adsorptive group with respect to the metal which comprises a light reflection layer.
  • corrosion refers to a phenomenon in which a metal is chemically or electrochemically eroded or deteriorated in material by an environmental substance 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 .
  • Examples of the corrosion inhibitor having an adsorptive group for metals 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 preferable to be selected from at least one of a compound having an indazole ring, a compound having an indazole ring, a copper chelate compound, a thiourea, a compound having a mercapto group, a naphthalene compound, or a mixture of two or more thereof.
  • the ultraviolet absorber may also serve as a corrosion inhibitor. It is also possible to use a silicone-modified resin. More specifically, the corrosion inhibitors described in paragraphs “0063” to “0072” of JP2012-232538A can be used.
  • a gas barrier layer may be provided on the light incident side of the silver reflective layer.
  • the gas barrier layer is intended to prevent deterioration of the humidity, especially the deterioration of the resin base material and each component layer supported by the resin base material 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.
  • the moisture-proof barrier layer, 40 ° C., the water vapor permeability at 90% RH is preferably not more than 1g / m 2 ⁇ day, more preferably at most 0.5g / m 2 ⁇ day, 0 More preferably, it is 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 90% RH.
  • Examples of the method for forming the gas barrier layer include a method of forming an inorganic oxide by a method such as a vacuum deposition method, a sputtering method, an ion beam assist method, a chemical vapor deposition method, etc., but a precursor of an inorganic oxide by a sol-gel method.
  • a method of forming an inorganic oxide film by applying a heat treatment and / or ultraviolet irradiation treatment to the coating film after coating the body is also preferably used.
  • the inorganic oxide is formed by local heating from a sol using an organometallic compound as a raw material.
  • an organometallic compound for example, oxides of elements such as silicon, aluminum, zirconium, titanium, tantalum, zinc, barium, indium, tin, and niobium contained in the organometallic compound, such as silicon oxide, aluminum oxide, zirconium oxide, etc. is there. Of these, silicon oxide is preferred.
  • the inorganic oxide As a method for forming the inorganic oxide, it is preferable to use a so-called sol-gel method or a polysilazane method.
  • the sol-gel method is a method of forming an inorganic oxide from an organometallic compound that is a precursor of an inorganic oxide
  • the polysilazane method is a method of forming an inorganic oxide from a polysilazane that is a precursor of an inorganic oxide.
  • the compounds and methods described in paragraphs “0174” to “0191” of JP2012-232538A can be appropriately employed.
  • the anchor layer is made of a resin, and is a layer provided for closely attaching the resin base material and the light reflection layer, or the support base material (resin film) of the light reflection layer and the light reflection layer. Therefore, the anchor layer has an adhesion property for closely adhering the resin base material (support base material) and the light reflection layer, heat resistance that can withstand heat when the light reflection layer is formed by a vacuum deposition method, and the light reflection layer. It is preferable to have smoothness to bring out the high reflection performance inherent in the.
  • the resin used for the anchor layer is not particularly limited as long as it satisfies the above conditions of adhesion, heat resistance, and smoothness.
  • polyester resin, polyurethane resin, acrylic resin, melamine resin, epoxy resin, Polyamide resin, polyvinyl chloride, vinyl chloride-vinyl acetate copolymer resin, etc. can be used alone or in combination.
  • a mixed resin of a polyester resin and a melamine resin or a mixed resin of a polyester resin and a urethane resin is preferable, and a thermosetting resin in which a curing agent such as isocyanate is further mixed is more preferable.
  • curing agent is mixed, an anchor layer becomes a form containing the hardened
  • the thickness of the anchor layer is preferably 0.01 to 3 ⁇ m, more preferably 0.1 to 2 ⁇ m.
  • the anchor layer can contain the corrosion inhibitor described in the above section [Resin coat layer].
  • a method for forming the anchor layer conventionally known coating methods such as a gravure coating method, a reverse coating method, and a die coating method can be used.
  • the adhesive layer of a film mirror is a layer for attaching a film mirror to a support by the adhesive layer to form a solar power generation reflective device.
  • the film mirror may have a release layer on the side opposite to the light incident side of the adhesive layer.
  • the adhesive layer is not particularly limited, and for example, any of a dry laminate agent, a wet laminate agent, an adhesive agent, a heat seal agent, a hot melt agent, and the like is used.
  • the adhesive include polyester resin, polyurethane resin, polyvinyl acetate resin, acrylic resin, and nitrile rubber.
  • 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.
  • the film mirror of the present invention may have a release layer on the side opposite to the light incident side of the adhesive layer.
  • a film mirror when a film mirror is shipped, it is shipped with the release layer attached to the adhesive layer, the film mirror having the adhesive layer is peeled off from the release layer, and is bonded to another substrate to form a solar reflective mirror. be able to.
  • the release layer is not particularly limited as long as it can provide protection of the light reflecting layer.
  • a resin film or sheet that has been subjected to surface treatment is used.
  • the thickness of the release layer is not particularly limited, but is usually preferably in the range of 12 to 250 ⁇ m.
  • the film mirror may be bonded after providing a recess or projection before bonding these release layers to the film mirror, or may be molded to have a recess or projection after bonding, You may simultaneously shape
  • the solar power generation reflecting device of the present invention has the film mirror of the present invention and a self-supporting support, and the film mirror is bonded to the support through an adhesive layer. That is, this invention also provides the solar power generation reflective apparatus which has the film mirror of this invention, and a support body.
  • the self-supporting support 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 means supporting the opposite edge portions when cut to a size used as a support for a solar power generation reflector.
  • the support body of the solar power generation reflection device has self-supporting properties, so that it is easy to handle when installing the solar power generation reflection device, and the holding member for holding the solar power generation reflection device has a simple configuration. Therefore, it is possible to reduce the weight of the reflection device, and it is possible to suppress power consumption during solar tracking.
  • the self-supporting support is composed of a pair of metal flat plates and an intermediate layer provided between the metal flat plates, and the intermediate layer is formed of a layer having a hollow structure or a resin material.
  • the intermediate layer is a layer having a hollow structure or a layer made of a resin material, so that the weight of the support can be significantly reduced compared to the case where the support is made of only a metal flat plate.
  • the rigidity can be increased by the relatively lightweight intermediate layer, it is possible to provide a lightweight and self-supporting support. Even when 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 foamed resin, a three-dimensional structure (honeycomb structure or the like) having a wall surface made of metal, an inorganic material or a resin material, a resin material to which hollow fine particles are added, or the like can be used.
  • the cellular structure of the foamed resin refers to a gas that is finely dispersed in the resin material and formed into a foamed or porous shape.
  • the material a known foamed resin material can be used, but a polyolefin resin, Polyurethane, polyethylene, polystyrene and the like are preferably 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.
  • Polyolefin eg, polypropylene, high density polyethylene
  • polyamide polystyrene, polyvinyl chloride, polyacrylonitrile, acrylic derivatives such as ethylene-ethyl acrylate copolymer, polycarbonate, vinyl acetate copolymer such as ethylene-vinyl acetate copolymer
  • Polymers, ionomers, terpolymers such as 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.
  • thermoplastic resins polyolefin resins or resins mainly composed of polyolefin resins are preferable, and polypropylene resins or resins mainly composed of polypropylene resins are more preferable because of excellent balance between mechanical strength and moldability.
  • 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 can be a layer made of a resin plate.
  • the resin material constituting the intermediate layer is preferably the same as the material constituting the support for the film mirror described above. Can do.
  • the intermediate layer need not be provided in all regions of the substrate, and may be provided in a part of the region as long as the flatness of the metal flat plate and the self-supporting property as the support can be ensured.
  • 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 support may be a layer made of a resin material having a hollow structure.
  • the support is made of a resin-only layer, the thickness required to obtain rigidity sufficient to provide self-supporting properties increases, and as a result, the mass of the support becomes heavy. By providing the weight, it is possible to reduce the weight while providing a self-supporting property.
  • a layer made of a resin material having a hollow structure 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 substrate 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 structure can be used.
  • the same resin material as that used can be preferably used.
  • the solar power generation reflecting device may have a holding member.
  • the holding member preferably holds the film mirror and the support in a state where the sun can be tracked.
  • the holding member has a configuration for holding the film mirror and the support in a state where the sun can be tracked.
  • it may be driven manually, or a separate drive device may be provided to automatically track the sun. It is good also as a structure.
  • Example 1 A biaxially stretched polyester film (polyethylene terephthalate film (PET), thickness 25 ⁇ m) was used as the resin substrate.
  • a polyester resin Polyyester (registered trademark) LP-050 S50TO, manufactured by Nippon Synthetic Chemical Industry Co., Ltd.) was diluted with methyl ethyl ketone so that the solid content was 20% by mass as a coating solution for forming a hard coat adjacent layer.
  • the obtained coating solution was coated on one surface of the PET film by a bar coating method and dried at 80 ° C. for 1 minute to form a hard coat adjacent layer having a thickness of 25 ⁇ m.
  • an acrylic silicone-based thermosetting resin Surcoat BP-16N (manufactured by Kinken Co., Ltd., 45 mass% methanol solution) is added with 1-propanol to a solid content of 30 mass%.
  • a coating solution was prepared as described above. This coating solution is coated on the hard coat adjacent layer by the bar coating method, and is cured by drying at 80 ° C. for 1 minute, and a thickness of 3 ⁇ m including the cured product of the acrylic silicone thermosetting resin is applied. A hard coat layer was formed.
  • a light reflecting layer made of aluminum having a thickness of 100 nm was formed on the opposite surface of the resin base material on which the hard coat adjacent layer was formed by a vacuum deposition method.
  • 2-Mercaptobenzothiazole as an aluminum corrosion inhibitor is 10% by mass with respect to the above mixture of polyester resin and 2,4-tolylene diisocyanate mixed at a mass ratio of 10: 2.
  • a coating solution for forming a corrosion prevention layer was prepared such that the solid content concentration in methyl ethyl ketone was 5% by mass. This coating solution is coated on the light reflecting layer opposite to the side where the resin substrate of the light reflecting layer is provided by the gravure coating method, and cured at 80 ° C. for 1 minute to perform a curing treatment. A corrosion prevention layer having a thickness of 3 ⁇ m including the cured product was formed.
  • Example 2 A film mirror was produced in the same manner as in Example 1 except that the polyester resin used for the hard coat adjacent layer was changed to Polyester (registered trademark) LP-033 S30TM (manufactured by Nippon Synthetic Chemical Industry Co., Ltd.).
  • Example 3 The polyester resin used in the hard coat adjacent layer was changed to Polyester (registered trademark) LP-035 S50TO (manufactured by Nippon Synthetic Chemical Industry Co., Ltd.), and the coating liquid for forming the hard coat adjacent layer was manufactured by DIC Corporation.
  • a film mirror was produced in the same manner as in Example 1 except that 0.05% by mass of Megafac (registered trademark) RS-76E, which is a UV reactive surface modifier, was added to the polyester resin.
  • Example 4 A film mirror was produced in the same manner as in Example 3, except that the amount of MegaFac (registered trademark) RS-76E was changed to 0.1% by mass with respect to the polyester resin.
  • MegaFac registered trademark
  • the polyester resin used for the hard coat adjacent layer is Polyester (registered trademark) LP-033 S30TM (manufactured by Nippon Synthetic Chemical Industry Co., Ltd.), and MegaFac (registered trademark), a UV reactive surface modifier manufactured by DIC Corporation. ) Implemented except that 0.1% by mass of RS-76E was added to the polyester resin, and 1% by mass of silica particles (Silicia (registered trademark) 470 manufactured by Fuji Silysia Chemical Co., Ltd.) was added to the polyester resin. A film mirror was produced in the same manner as in Example 1.
  • Example 6 Example 5 except that 0.125% by mass of RS-76E was added without adding silica particles, and the light reflection layer was changed to a layer made of silver having a thickness of 100 nm formed by vacuum deposition. In the same manner, a film mirror was produced.
  • Example 1 As a coating solution for forming a hard coat adjacent layer, polymethyl methacrylate (PMMA) resin (EMB457, manufactured by Mitsubishi Rayon Co., Ltd.), acrylic rubber (Delpet SRB215, manufactured by Asahi Kasei Chemicals Co., Ltd.), and 1,6-hexamethylene diisocyanate Further, 3% by mass of silica particles (Silicia (registered trademark) 470 manufactured by Fuji Silysia Chemical Co., Ltd.) is added to the PMMA resin so that the solid content ratio is 17: 3: 2 (mass ratio).
  • a film mirror was produced in the same manner as in Example 1 except that a mixture of the above components in methyl ethyl ketone was prepared so that the concentration of the entire component was 22% by mass.
  • Example 2 A film mirror was produced in the same manner as in Example 1 except that the polyester resin used for the hard coat adjacent layer was changed to LP-011 S50TO (manufactured by Nippon Synthetic Chemical Industry Co., Ltd.).
  • Comparative Example 3 A film mirror was produced in the same manner as in Comparative Example 1, except that no silica particles were added and 0.075% by mass of MegaFac® RS-76E was added to the PMMA resin.
  • Comparative Example 4 A film mirror was produced in the same manner as in Comparative Example 3 except that the amount of MegaFac (registered trademark) RS-76E was changed to 0.125 mass% with respect to the PMMA resin.
  • the obtained film mirror was evaluated by the following dynamic friction coefficient measurement, initial reflectance measurement, and reflectance measurement after sandblasting.
  • Table 1 shows the configurations and evaluation results of the film mirrors of Examples and Comparative Examples.
  • the “ ⁇ reflectance” in Table 1 indicates the difference between the reflectance after sandblasting and the initial reflectance. The closer to 0, the less the regular reflectance after sandblasting decreases, and the scratch resistance (sandblast resistance). ).
  • the film mirror of the present invention has little decrease in regular reflectance after surface sandblasting and is excellent in surface sandblast resistance, that is, scratch resistance.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Sustainable Energy (AREA)
  • Sustainable Development (AREA)
  • Life Sciences & Earth Sciences (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)
  • Laminated Bodies (AREA)

Abstract

La présente invention concerne un miroir à film présentant une excellente résistance aux rayures superficielles. Ce miroir à film comporte : un matériau de base en résine et une couche réfléchissant la lumière ; une couche de revêtement dur positionnée sur le côté le plus exposé à la lumière ; et une couche adjacente au revêtement dur adjacente à la couche de revêtement dur. Le module de Young de la couche adjacente au revêtement dur est de 0,01 à 1,0 GPa.
PCT/JP2015/053146 2014-02-13 2015-02-04 Miroir à film, et dispositif de réflexion pour la génération d'énergie solaire WO2015122337A1 (fr)

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JP2014025933A JP2017067797A (ja) 2014-02-13 2014-02-13 フィルムミラーおよび太陽熱発電用反射装置

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WO2019230895A1 (fr) * 2018-05-30 2019-12-05 タキロンシーアイ株式会社 Feuille de durcissement s'utilisant dans le cadre d'un décapage par abrasif

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JPH09127301A (ja) * 1995-10-27 1997-05-16 Nikon Corp プラスチックレンズ
JPH11255827A (ja) * 1998-03-12 1999-09-21 Sekisui Chem Co Ltd ポリビニルアセタール樹脂及びこれを用いた合わせガラス用中間膜
JP2003227902A (ja) * 2002-02-05 2003-08-15 Fuji Photo Film Co Ltd 反射防止ハードコートフィルム及びこれを用いる画像表示装置
JP2003311540A (ja) * 2002-04-30 2003-11-05 Sony Corp 電解研磨液、電解研磨方法及び半導体装置の製造方法
JP2004029240A (ja) * 2002-06-24 2004-01-29 Fuji Photo Film Co Ltd 防眩性反射防止フィルムの製造方法
WO2006135105A1 (fr) * 2005-06-17 2006-12-21 Jsr Corporation Composition de résine photodurcissable et feuille formant lentille prismatique
WO2011096309A1 (fr) * 2010-02-03 2011-08-11 コニカミノルタオプト株式会社 Film miroir, son procédé de production et miroirs réfléchissant la lumière solaire
WO2013094633A1 (fr) * 2011-12-21 2013-06-27 コニカミノルタ株式会社 Miroir à film pour réfléchir la lumière solaire et dispositif réfléchissant pour produire de l'énergie solaire
US20130335840A1 (en) * 2011-03-31 2013-12-19 Konica Minolta, Inc. Mirror and reflective device for generating solar power

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Publication number Priority date Publication date Assignee Title
JPH09127301A (ja) * 1995-10-27 1997-05-16 Nikon Corp プラスチックレンズ
JPH11255827A (ja) * 1998-03-12 1999-09-21 Sekisui Chem Co Ltd ポリビニルアセタール樹脂及びこれを用いた合わせガラス用中間膜
JP2003227902A (ja) * 2002-02-05 2003-08-15 Fuji Photo Film Co Ltd 反射防止ハードコートフィルム及びこれを用いる画像表示装置
JP2003311540A (ja) * 2002-04-30 2003-11-05 Sony Corp 電解研磨液、電解研磨方法及び半導体装置の製造方法
JP2004029240A (ja) * 2002-06-24 2004-01-29 Fuji Photo Film Co Ltd 防眩性反射防止フィルムの製造方法
WO2006135105A1 (fr) * 2005-06-17 2006-12-21 Jsr Corporation Composition de résine photodurcissable et feuille formant lentille prismatique
WO2011096309A1 (fr) * 2010-02-03 2011-08-11 コニカミノルタオプト株式会社 Film miroir, son procédé de production et miroirs réfléchissant la lumière solaire
US20130335840A1 (en) * 2011-03-31 2013-12-19 Konica Minolta, Inc. Mirror and reflective device for generating solar power
WO2013094633A1 (fr) * 2011-12-21 2013-06-27 コニカミノルタ株式会社 Miroir à film pour réfléchir la lumière solaire et dispositif réfléchissant pour produire de l'énergie solaire

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