WO2013099564A1 - 赤外遮蔽フィルム、これを用いた熱線反射合わせガラス、および熱線反射合わせガラスの製造方法 - Google Patents
赤外遮蔽フィルム、これを用いた熱線反射合わせガラス、および熱線反射合わせガラスの製造方法 Download PDFInfo
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- WO2013099564A1 WO2013099564A1 PCT/JP2012/081828 JP2012081828W WO2013099564A1 WO 2013099564 A1 WO2013099564 A1 WO 2013099564A1 JP 2012081828 W JP2012081828 W JP 2012081828W WO 2013099564 A1 WO2013099564 A1 WO 2013099564A1
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- refractive index
- index layer
- film
- infrared shielding
- shielding film
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Definitions
- the present invention relates to an infrared shielding film, a heat ray reflective laminated glass using the same, and a method for producing the heat ray reflective laminated glass.
- heat insulating glass having an infrared shielding film has been employed in architectural glass and vehicle glass for the purpose of shielding solar radiation energy entering a room or in a vehicle and reducing temperature rise and cooling load.
- a dry process such as vacuum deposition or sputtering is well known, but it is said that it is difficult to form a film uniformly over a large area because of its principle and apparatus configuration.
- the film formation rate is very slow, the manufacturing cost is high and the manufacturing method is not suitable for mass production.
- the film-forming substrate often requires heat resistance.
- the film since the resin base material has a large coefficient of thermal expansion and contraction, the film may be peeled off or uneven due to stress caused by the difference in shrinkage rate between the substrate and the deposited film while the temperature drops from the deposition temperature to room temperature. May occur.
- a film formed by vapor deposition or sputtering generally has a hard property, when it is formed on a flexible substrate, cracks or scratches may occur in the bent portion.
- Patent Document 1 describes a method of forming a film in which the refractive index can be easily controlled by stretching the film.
- the infrared shielding film disclosed in Patent Document 1 is easy to control the refractive index, it uses the refractive index control by stretching the film, so that it reflects infrared light incident on the film perpendicularly. Although the rate is high, the refractive index difference is small for obliquely incident light, so that the infrared reflectance is lowered. Further, when a film is used for curved glass for vehicles or the like, color unevenness due to reflection of visible light may occur.
- an object of the present invention is to provide an infrared shielding film having a high infrared shielding effect at any incident angle of sunlight and a laminated glass using the same.
- Another object of the present invention is to provide a sufficient infrared shielding effect even when an infrared shielding film is used for curved glass, and an infrared shielding film having little color unevenness due to reflection of visible light. And it aims at providing the laminated glass using the same.
- an infrared shielding film reflecting one aspect of the present invention a heat ray reflective laminated glass and a method for producing the heat ray reflective laminated glass are as follows. .
- An infrared shielding film including at least one unit in which a high refractive index layer and a low refractive index layer are laminated, wherein the high refractive index layer is selected from the group consisting of polyester, polycarbonate and poly (meth) acrylate
- An infrared shielding film comprising at least one selected from the group consisting of metal oxide particles.
- the metal oxide particles are titanium oxide particles.
- a heat ray reflective laminated glass comprising: the infrared shielding film according to 1), a pair of intermediate films that sandwich the infrared shielding film, and a pair of plate glasses that sandwich the infrared shielding film and the intermediate film.
- composition for forming a high refractive index layer containing at least one selected from the group consisting of polyester, polycarbonate and poly (meth) acrylate and metal oxide particles, and a composition for forming a low refractive index layer
- a composition for forming a low refractive index layer Forming a high refractive index layer and a low refractive index layer by simultaneous extrusion to obtain an infrared shielding film, sandwiching the infrared shielding film between a pair of intermediate films, and further, the infrared shielding film and the intermediate film And a step of sandwiching the pair of glass plates with a pair of plate glasses.
- the infrared shielding film of the present invention includes a unit composed of a high refractive index layer and a low refractive index layer as a basic structure. And it has the characteristics in using a metal oxide particle and a polymer for a high refractive index layer.
- a conventional high refractive index layer particularly a high refractive index layer in which the refractive index is controlled by stretching a film, has a large birefringence derived from molecular orientation. The angle dependency was large.
- the infrared shielding film of the present invention can exhibit an infrared shielding effect without depending on the angle of incident light. This is presumably because the high refractive index layer contains metal oxide particles, and the molecular orientation of the polymer is suppressed by the metal oxide particles, so that birefringence is reduced.
- the refractive index of the high refractive index layer can be increased.
- a high infrared reflectance can be obtained even if the number of units in which the refractive index layers are stacked is reduced to form a thin film.
- the high refractive index layer includes at least one polymer of polyester, polycarbonate and poly (meth) acrylate and metal oxide particles.
- the metal constituting the metal oxide is Li, Na, Mg, Al, Si, K, Ca, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Rb, Sr, Y, Nb, Zr, Mo, Ag, Cd, In, Sn, Sb, Cs, Ba, La, Ta, Hf, W, Ir, Tl, Pb, Bi and a rare earth metal
- a metal oxide that is one kind or two or more kinds of metals can be used.
- rare earth oxides can also be used as the metal oxide particles. Specifically, scandium oxide, yttrium oxide, lanthanum oxide, cerium oxide, praseodymium oxide, neodymium oxide, samarium oxide, europium oxide, gadolinium oxide, and oxidation. Examples also include terbium, dysprosium oxide, holmium oxide, erbium oxide, thulium oxide, ytterbium oxide, and lutetium oxide.
- metal oxide particles used in the high refractive index layer metal oxide particles having a refractive index of 1.90 or more, more preferably 2.0 or more are preferable.
- metal oxide particles having a refractive index of 1.90 or more, more preferably 2.0 or more are preferable.
- the metal oxide particles used for the high refractive index layer may be used singly or in combination of two or more.
- the metal oxide particles preferably have an average primary particle size of 100 nm or less, more preferably 4 to 50 nm, from the viewpoint of film transparency.
- the average particle size of the metal oxide particles is determined by observing the particles themselves or the particles appearing on the cross section or surface of the layer with an electron microscope and measuring the particle size of 1,000 arbitrary particles. Average).
- the particle diameter of each particle is represented by a diameter assuming a circle equal to the projected area.
- titanium oxide particles are often used in a surface-treated state for the purpose of suppressing the photocatalytic activity of the particle surface and improving dispersibility in a solvent, etc.
- Silica, alumina, aluminum hydroxide, zirconia, and the like are preferably treated with one or more of them. More specifically, the surface of the titanium oxide particle is covered with a coating layer made of silica, and the surface of the particle is negatively charged, or the surface is positively charged at a pH of 8 to 10 where a coating layer made of aluminum oxide is formed.
- the titanium oxide particles are preferably monodispersed.
- the monodispersion here means that the monodispersity obtained by the following formula is 40% or less.
- the particles are more preferably 30% or less, and particularly preferably 0.1 to 20%.
- Monodispersity (standard deviation of particle size) / (average value of particle size) ⁇ 100
- the viewpoint of infrared shielding and the reduction of color unevenness when a film is applied to curved glass From the viewpoint, it is preferably 20 to 80% by mass, more preferably 30 to 70% by mass, and further preferably 40 to 60% by mass.
- the high refractive index layer essentially includes a polymer material. If the refractive index layer is formed of a polymer material, a film forming method such as coating or spin coating can be selected. Since these methods are simple and do not ask the heat resistance of a base material, there are many choices, and it can be said that it is an effective film forming method particularly for a resin base material. For example, a mass production method such as a roll-to-roll method can be adopted for the coating type, which is advantageous in terms of cost and process time. Moreover, since the film
- the polymer contained in the high refractive index layer has at least one selected from the group consisting of polyester, polycarbonate, and poly (meth) acrylate because it has excellent mixing properties with metal oxide particles and good film formability. including.
- the polymer constituting the high refractive index layer may be one type or two or more types.
- the content of polyester, polycarbonate and poly (meth) acrylate in the polymer is preferably 60 to 100% by mass, more preferably 80 to 100% by mass with respect to the total mass of the polymer. preferable.
- Polyester has a structure obtained by polycondensation of a dicarboxylic acid component and a diol component.
- the polyester may be a copolymer.
- polyesters that can be used include polyethylene naphthalate (PEN) and its isomers (eg, 2,6-, 1,4-, 1,5-, 2,7-, and 2,3-PEN).
- polyalkylene naphthalates such as polyethylene terephthalate (for example, polyethylene terephthalate, polypropylene terephthalate, polybutylene terephthalate, and poly-1,4-cyclohexanedimethylene terephthalate), polyethylene diphenylate, and the like.
- polyalkylene terephthalate is preferably polyalkylene naphthalate, more preferably polyalkylene terephthalate, More preferred is polyethylene terephthalate.
- the poly (meth) acrylate is a polymer of acrylic acid ester or methacrylic acid ester, and examples thereof include polymethyl methacrylate, polyethyl methacrylate, polyisobutyl methacrylate, polypropyl methacrylate, polybutyl acrylate, and polymethyl acrylate. .
- polymethyl methacrylate is preferable because it has a high infrared shielding effect, is inexpensive, and can be used for a wide variety of applications.
- the weight average molecular weight of the polyester, polycarbonate and poly (meth) acrylate contained in the high refractive index layer is about 10,000 to 1,000,000, and preferably 50,000 to 800,000.
- the value measured by gel permeation chromatography (GPC) is employ
- the high refractive index layer may contain other polymers other than polyester, polycarbonate, and poly (meth) acrylate.
- examples of the other polymer include polymers listed as polymers used in the following low refractive index layer.
- the polymer content in the high refractive index layer is 20 to 80% by mass, more preferably 40 to 60% by mass, based on the total solid content of the high refractive index.
- the low refractive index layer preferably contains a polymer as described in the polymer section above.
- the polymer contained in the low refractive index layer is not particularly limited.
- polyethylene naphthalate (PEN) and its isomers for example, 2,6-, 1,4-, 1,5-, 2,7-, and 2,3-PEN
- polyalkylene terephthalates eg, polyethylene terephthalate, polypropylene terephthalate, polybutylene terephthalate, and poly-1,4-cyclohexanedimethylene terephthalate
- polyimides eg, polyacrylimide
- Polyetherimide atactic polystyrene
- polycarbonate polymethacrylate (eg, polyisobutyl methacrylate, polypropyl methacrylate, polyethyl methacrylate, and polymethyl methacrylate)
- polyacrylate eg, Polybutyl acrylate and polymethyl acrylate
- cellulose derivatives eg, ethyl cellulose, cellulose acetate, cellulose propionate, cellulose
- a copolymer for example a copolymer of PEN (for example 2,6-, 1,4-, 1,5-, 2,7- and / or 2,3-naphthalenedicarboxylic acid or an ester thereof; Acid or ester thereof, (b) isophthalic acid or ester thereof, (c) phthalic acid or ester thereof, (d) alkane glycol, (e) cycloalkane glycol (for example, cyclohexanedimethanol diol), (f) alkanedicarboxylic acid And / or (g) a copolymer with a cycloalkanedicarboxylic acid (eg, cyclohexanedicarboxylic acid), a copolymer of a polyalkylene terephthalate (eg, terephthalic acid or an ester thereof, (a) a naphthalenedicarboxylic acid or an ester thereof, (b ) Isophthalic acid too Or an ester
- Dicarboxylic acids eg, copolymers with cyclohexanedicarboxylic acid
- styrene copolymers eg, styrene-butadiene copolymers and styrene-acrylonitrile copolymers
- copolymers of 4,4′-dibenzoic acid and ethylene glycol can also be utilized.
- each individual layer may include a blend of two or more of the above polymers or copolymers (eg, a blend of sPS and atactic polystyrene).
- the polymer material contained in the low refractive index layer is preferably poly (meth) acrylate, polyalkylene polymer, cellulose derivative, etc. from the viewpoint of infrared shielding effect, more preferably poly (meth) acrylate, and polymethyl. More preferred is methacrylate.
- the weight average molecular weight of the polymer contained in the low refractive index layer is about 10,000 to 1,000,000, preferably 50,000 to 800,000.
- the value measured by gel permeation chromatography (GPC) is employ
- the polymer content in the low refractive index layer is 50 to 100% by mass, more preferably 70 to 100% by mass, based on the total solid content of the low refractive index.
- the low refractive index layer may contain metal oxide particles, and silicon dioxide is preferably used as the metal oxide particles, and colloidal silica is particularly preferably used.
- the metal oxide particles (preferably silicon dioxide) contained in the low refractive index layer preferably have an average particle size of 3 to 100 nm.
- the average particle size of primary particles of silicon dioxide dispersed in a primary particle state is more preferably 3 to 50 nm, and further preferably 3 to 40 nm. It is particularly preferably 3 to 20 nm, and most preferably 4 to 10 nm.
- grains it is preferable from a viewpoint with few hazes and excellent visible light transmittance
- the average particle size of the metal oxide in the low refractive index layer is determined by observing the particles themselves or the cross section or surface of the refractive index layer with an electron microscope and measuring the particle size of 1,000 arbitrary particles. The simple average value (number average) is obtained.
- the particle diameter of each particle is represented by a diameter assuming a circle equal to the projected area.
- Colloidal silica is obtained by heating and aging a silica sol obtained by metathesis of sodium silicate with an acid or the like or passing through an ion exchange resin layer.
- a silica sol obtained by metathesis of sodium silicate with an acid or the like or passing through an ion exchange resin layer for example, JP-A-57-14091 and JP-A-60- No.
- colloidal silica may be a synthetic product or a commercially available product.
- the surface of the colloidal silica may be cation-modified, or may be treated with Al, Ca, Mg, Ba or the like.
- the content of the metal oxide particles in the low refractive index layer is preferably 0 to 50% by mass from the viewpoint of infrared shielding with respect to 100% by mass of the solid content of the low refractive index layer, and preferably 0 to 30%. More preferably, it is mass%.
- various additives can be contained in the high refractive index layer and the low refractive index layer according to the present invention as necessary.
- optical brighteners sulfuric acid, phosphoric acid, acetic acid , PH adjusters such as citric acid, sodium hydroxide, potassium hydroxide and potassium carbonate, antifoaming agents, lubricants such as diethylene glycol, Preservative, an antistatic agent may contain various known additives such as a matting agent.
- Base material If necessary, a base material may be used for the infrared shielding film.
- polyester films As the base material of the infrared shielding film, various resin films can be used, such as polyolefin films (polyethylene, polypropylene, etc.), polyester films (polyethylene terephthalate, polyethylene naphthalate, etc.), polyvinyl chloride, cellulose acetate, etc.
- a polyester film can be used.
- the polyester film (hereinafter referred to as “polyester”) is not particularly limited, but is preferably a polyester having film-forming properties having a dicarboxylic acid component and a diol component as main components.
- the main component dicarboxylic acid component includes terephthalic acid, isophthalic acid, phthalic acid, 2,6-naphthalenedicarboxylic acid, 2,7-naphthalenedicarboxylic acid, diphenylsulfone dicarboxylic acid, diphenyl ether dicarboxylic acid, diphenylethanedicarboxylic acid, Examples thereof include cyclohexane dicarboxylic acid, diphenyl dicarboxylic acid, diphenyl thioether dicarboxylic acid, diphenyl ketone dicarboxylic acid, and phenylindane dicarboxylic acid.
- diol component examples include ethylene glycol, propylene glycol, tetramethylene glycol, cyclohexanedimethanol, 2,2-bis (4-hydroxyphenyl) propane, 2,2-bis (4-hydroxyethoxyphenyl) propane, bis ( 4-Hydroxyphenyl) sulfone, bisphenol fluorene hydroxyethyl ether, diethylene glycol, neopentyl glycol, hydroquinone, cyclohexanediol and the like.
- polyesters having these as main components from the viewpoints of transparency, mechanical strength, dimensional stability, etc., dicarboxylic acid components such as terephthalic acid, 2,6-naphthalenedicarboxylic acid, diol components such as ethylene glycol and 1 Polyester having 1,4-cyclohexanedimethanol as the main constituent is preferred.
- polyesters mainly composed of polyethylene terephthalate and polyethylene naphthalate, copolymerized polyesters composed of terephthalic acid, 2,6-naphthalenedicarboxylic acid and ethylene glycol, and mixtures of two or more of these polyesters are mainly used. Polyester as a constituent component is preferable.
- the thickness of the film support used in the present invention is preferably 10 to 300 ⁇ m, particularly 20 to 150 ⁇ m.
- the film support of the present invention may be a laminate of two sheets. In this case, the type may be the same or different.
- the infrared shielding film of the present invention may have a configuration (laminated film) in which at least one unit composed of a high refractive index layer and a low refractive index layer is laminated, but the total number of high refractive index layers and low refractive index layers. Is preferably 100 layers or less, that is, 50 units or less. More preferably, it is 40 layers (20 units) or less, and more preferably 20 layers (10 units) or less. The lower limit of the total number of layers is not particularly limited, but is preferably 5 layers or more.
- the film of the present application contains metal oxide particles in the high refractive index layer, the number of laminations can be reduced and a thin film can be formed as compared with a conventional polymer lamination film.
- productivity can be improved and a decrease in transparency due to scattering at the lamination interface can be suppressed.
- the infrared shielding film of the present invention may have a configuration in which at least one of the above units is laminated, for example, a laminated film in which both the outermost layer and the lowermost layer of the laminated film are high refractive index layers or low refractive index layers. It may be a membrane.
- the high refractive index layer preferably has a refractive index of 1.70 to 2.50, more preferably 1.80 to 2.20, and even more preferably 1.90 to 2. .20.
- the low refractive index layer of the present invention preferably has a refractive index of 1.10 to 1.60, more preferably 1.30 to 1.55, and further preferably 1.30 to 1.50. preferable.
- the refractive index difference between the adjacent high refractive index layer and the low refractive index layer is preferably 0.1 or more, Preferably it is 0.3 or more, More preferably, it is 0.4 or more.
- the difference in refractive index between the adjacent high refractive index layer and the low refractive index layer is preferably 0.1 or more, but the high refractive index layer and the low refractive index layer are When each has a plurality of layers as described above, it is preferable that all refractive index layers satisfy the requirements defined in the present invention. However, the outermost layer and the lowermost layer may be configured outside the requirements defined in the present invention.
- the reflectance in a specific wavelength region is determined by the difference in refractive index between two adjacent layers (high refractive index layer and low refractive index layer) and the number of layers, and the larger the refractive index difference, the same reflectance can be obtained with a smaller number of layers. .
- the refractive index difference and the required number of layers can be calculated using commercially available optical design software. For example, in order to obtain an infrared shielding ratio of 90% or more, if the refractive index difference is smaller than 0.1, it is necessary to laminate more than 100 layers, which not only lowers productivity but also scattering at the lamination interface. Increases and transparency decreases. From the viewpoint of improving reflectivity and reducing the number of layers, there is no upper limit to the difference in refractive index, but the limit is substantially about 1.40.
- the refractive index difference is obtained by calculating the refractive index of the high refractive index layer and the low refractive index layer according to the following method, and the difference between the two is defined as the refractive index difference.
- each refractive index layer is produced as a single layer, and after cutting this sample into 10 cm ⁇ 10 cm, the refractive index is determined according to the following method. Using a U-4000 type (manufactured by Hitachi, Ltd.) as a spectrophotometer, the surface opposite to the measurement surface (back surface) of each sample is roughened, and then light absorption is performed with a black spray. Then, the reflection of light on the back surface is prevented, and the average value is obtained by measuring 25 points of reflectance in the visible light region (400 nm to 700 nm) under the condition of regular reflection at 5 degrees, and the average refractive index is determined from the measurement result. Ask.
- the high refractive index layer contains metal oxide particles, so the refractive index of the high refractive index layer can be increased, and the high and low refractive index It is possible to obtain a high infrared reflectivity even if a thin film is formed by reducing the number of units in which the rate layers are laminated.
- the total thickness of the infrared shielding film of the present invention is preferably 12 ⁇ m to 315 ⁇ m, more preferably 15 ⁇ m to 200 ⁇ m, and still more preferably 20 ⁇ m to 100 ⁇ m.
- the terms “high refractive index layer” and “low refractive index layer” refer to the refractive index layer having a higher refractive index when the refractive index difference between two adjacent layers is compared. This means that the lower refractive index layer is the lower refractive index layer. Therefore, the terms “high refractive index layer” and “low refractive index layer” are the same when each refractive index layer constituting the optical reflective film is focused on two adjacent refractive index layers. All forms other than those having a refractive index are included.
- the transmittance in the visible light region measured by JIS R3106-1998 is 50% or more, and the reflectance is 50% in the wavelength region of 900 nm to 1400 nm. It is preferable to have a region that exceeds.
- the thickness per layer of the refractive index layer is preferably 20 to 1000 nm, and more preferably 50 to 500 nm.
- Infrared shielding film has a conductive layer, an antistatic layer, a gas barrier layer, an easy adhesion layer (adhesion layer), an antifouling layer, a deodorizing layer, a droplet layer, an easy slip layer, and a hard layer for the purpose of adding further functions.
- one or more functional layers such as an infrared cut layer (metal layer, liquid crystal layer) and a colored layer (visible light absorption layer) other than the low refractive index layer may be included.
- the infrared shielding film of the present invention can be applied to a wide range of fields.
- film for window pasting such as heat ray reflecting film that gives heat ray reflection effect, film for agricultural greenhouses, etc. Etc., mainly for the purpose of improving the weather resistance.
- it is suitable for a member in which the infrared shielding film according to the present invention is bonded to a glass substrate via an intermediate film.
- infrared shielding film formed by laminating conventional polymers when applied to curved glass, various visible light reflections occur due to nonuniformity of the refractive index difference. Since the infrared shielding film of the present invention has a small angle dependency of the refractive index, when applied to curved glass, a sufficient infrared shielding effect can be obtained and color unevenness due to reflection of visible light can be reduced. it can.
- Laminated glass can be used for architectural use, residential use, automobile use, and the like.
- FIG. 1 One embodiment of laminated glass is shown in FIG.
- the laminated glass of FIG. 1 has a structure in which an infrared shielding film 3 is sandwiched between two sheet glasses 1 using two intermediate films 2.
- the infrared shielding film 3 is the infrared shielding film of the present invention described above.
- Other constituent members of the laminated glass will be described below.
- any film can be used as long as it has a bonding performance for bonding an infrared shielding film and glass.
- the intermediate film preferably contains a resin material such as polyvinyl butyral resin or ethylene-vinyl acetate copolymer resin.
- a resin material such as polyvinyl butyral resin or ethylene-vinyl acetate copolymer resin.
- plastic polyvinyl butyral manufactured by Sekisui Chemical Co., Ltd., Mitsubishi Monsanto Co., Ltd.
- ethylene-vinyl acetate copolymer manufactured by DuPont, Takeda Pharmaceutical Co., Ltd., duramin
- modified ethylene-vinyl acetate copolymer [Mersen G manufactured by Tosoh Corporation] and the like are contained.
- These resin materials are preferably 80 to 100% by mass with respect to 100% by mass of the intermediate film.
- the intermediate film may be composed of a single layer of the resin film or may be used in a state where two or more layers are laminated.
- the two intermediate films may be made of the same type of resin, or may be made of different types of resin.
- the intermediate film preferably contains heat ray shielding fine particles having an average particle diameter of 0.2 ⁇ m or less having heat ray shielding absorption ability from the viewpoint of the heat ray shielding effect.
- heat ray shielding fine particles having an average particle diameter of 0.2 ⁇ m or less having heat ray shielding absorption ability from the viewpoint of the heat ray shielding effect.
- heat ray shielding fine particles examples include Sn, Ti, Si, Zn, Zr, Fe, Al, Cr, Co, Ce, In, Ni, Ag, Cu, Pt, Mn, Ta, W, V, and Mo metals.
- examples thereof include oxides, nitrides, sulfides, these Sb, Sn, or F dopants alone or a composite selected from at least two of these, from the viewpoint of the heat ray shielding effect.
- Is preferably antimony-doped tin oxide (ATO) or indium tin oxide (ITO).
- the average particle diameter of the heat ray shielding fine particles is 0.2 ⁇ m or less because the heat ray shielding effect can be secured while suppressing the reflection of visible light, and haze deterioration due to scattering does not occur and transparency can be secured. Preferably, it is 0.15 ⁇ m or less.
- the lower limit of the average particle diameter is not particularly limited, but is preferably 0.10 ⁇ m or more.
- the average particle size is determined by observing particles themselves or particles appearing on the cross section or surface of the refractive index layer with an electron microscope, measuring the particle size of 1,000 arbitrary particles, and calculating the simple average value (number average). As required.
- the particle diameter of each particle is represented by a diameter assuming a circle equal to the projected area.
- the content of the heat ray shielding fine particles is not particularly limited, but is preferably 0.5 to 10% by mass with respect to the total mass of the intermediate film from the viewpoint of the heat ray shielding effect, and preferably 0.5 to More preferably, it is 5 mass%.
- the film thickness of the intermediate layer is usually about 0.1 to 2 mm.
- Plate glass The kind of plate glass is not specifically limited, What is necessary is just to select according to the light transmission performance and heat insulation performance which are requested
- the inorganic glass plate is not particularly limited, and examples thereof include various types of inorganic glass such as float plate glass, polished plate glass, mold plate glass, netted plate glass, wire-containing plate glass, heat ray absorbing plate glass, and colored plate glass.
- examples of the organic glass include glass plates made of resins such as polycarbonates, polystyrenes, and polymethyl methacrylates. These organic glass plates may be a laminate formed by laminating a plurality of sheet-shaped ones made of the resin.
- the color not only the transparent glass plate but also glass plates of various colors such as general-purpose green, brown and blue used for vehicles and the like can be used. The same type may be sufficient as plate glass, and may use 2 or more types together.
- the thickness of the plate glass is preferably about 1 to 10 mm in consideration of the strength and the transmittance of infrared light in the visible light region.
- the curved plate glass preferably has a radius of curvature of 0.5 to 2.0 m. If the radius of curvature of the plate glass is within this range, the infrared shielding film can follow the curved shape of the glass.
- the unit comprising a high refractive index layer and a low refractive index layer is laminated.
- the metal oxide is contained in the high refractive index layer, a film can be produced by both the production methods (1) and (2).
- the method using the simultaneous extrusion step (2) is preferable because a thin film laminate having a uniform film thickness can be formed and the infrared shielding effect is increased without depending on the angle of incident light.
- Examples of the coating method in the method (1) include a roll coating method, a rod bar coating method, an air knife coating method, a spray coating method, a curtain coating method, or U.S. Pat. Nos. 2,761,419 and 2,
- the slide bead coating method using the hopper and the extrusion coating method described in Japanese Patent No. 761,791 are preferably used.
- Specific examples of the method (1) include the following forms: (1) A high refractive index layer coating solution is applied on a substrate and dried to form a high refractive index layer, followed by low refraction. A method of forming a film by forming a low refractive index layer by applying a refractive index coating solution and drying; (2) A low refractive index layer is formed by applying a low refractive index layer coating solution on a substrate and drying it.
- a high refractive index layer coating solution is applied and dried to form a high refractive index layer and a film is formed; (3) a high refractive index layer coating solution and a low refractive index layer coating on a substrate; A method of forming a film including a high refractive index layer and a low refractive index layer by alternately applying and drying a multilayer and alternately coating the solution; (4) a high refractive index layer coating solution and a low refractive index on a substrate; And a method of forming a film including a high refractive index layer and a low refractive index layer by simultaneously applying a multilayer coating solution with a layer coating solution and drying.
- the organic solvent for adjusting each refractive index layer coating solution is appropriately selected according to the type of polymer used. Specifically, for example, alcohols such as methanol, ethanol, 2-propanol and 1-butanol, esters such as ethyl acetate, 2-methoxyethyl acetate, butyl acetate, propylene glycol monomethyl ether acetate and propylene glycol monoethyl ether acetate And ethers such as diethyl ether, propylene glycol monomethyl ether and ethylene glycol monoethyl ether, amides such as dimethylformamide and N-methylpyrrolidone, and ketones such as acetone, methyl ethyl ketone, acetylacetone and cyclohexanone. These organic solvents may be used alone or in combination of two or more. Of these, ethyl acetate is preferable, and 2-methoxyethyl acetate is more preferable.
- the concentration of the solvent in each refractive index layer coating solution is preferably 80 to 100% by mass.
- each refractive index layer material is melted at 100 to 400 ° C. so as to have an appropriate viscosity for extrusion, and various additives are added as necessary, so that both polymers are alternately formed into two layers. Can be extruded by an extruder.
- the polymer and other additives added as necessary are preferably mixed before melting.
- Mixing may be performed by a mixer or the like.
- the mixture may be directly melted and formed into a film using an extruder, but once the mixture is pelletized, the pellet may be melted with an extruder to form a film.
- extruder various extruders available on the market can be used, but a melt-kneading extruder is preferable, and a single-screw extruder or a twin-screw extruder may be used.
- twin-screw extruder when forming a film directly without producing pellets from the mixture, it is preferable to use a twin-screw extruder because an appropriate degree of kneading is required.
- the screw shape is a Maddock type. By changing to a kneading type screw such as unimelt or dull mage, moderate kneading can be obtained, so that it can be used.
- a single screw extruder or a twin screw extruder can be used.
- the extruded laminated film is cooled and solidified by a cooling drum or the like to obtain a laminated body.
- the laminated body is heated and then stretched in two directions to obtain an infrared shielding film.
- the unstretched film obtained by peeling from the above-mentioned cooling drum is subjected to a glass transition temperature (Tg) of ⁇ 50 ° C. to Tg + 100 ° C. via a plurality of roll groups and / or a heating device such as an infrared heater. It is preferable that the film is heated inside and stretched in one or more stages in the film conveying direction (also referred to as the longitudinal direction). Next, it is also preferable to stretch the stretched film obtained as described above in a direction perpendicular to the film transport direction (also referred to as the width direction). In order to stretch the film in the width direction, it is preferable to use a tenter device.
- Tg glass transition temperature
- the film When stretching in the film transport direction or the direction perpendicular to the film transport direction, the film is preferably stretched at a magnification of 1.5 to 5.0 times, more preferably in the range of 2.0 to 4.0 times.
- heat processing can be performed subsequent to stretching.
- the thermal processing is preferably carried out in the range of Tg-100 ° C. to Tg + 50 ° C., usually for 0.5 to 300 seconds.
- the heat processing means is not particularly limited and can be generally performed with hot air, infrared rays, a heating roll, microwaves, or the like, but is preferably performed with hot air in terms of simplicity.
- the heating of the film is preferably increased stepwise.
- the heat-processed film is usually cooled to Tg or less, and the clip gripping portions at both ends of the film are cut and wound.
- the cooling is gradually performed from the final heat processing temperature to Tg at a cooling rate of 100 ° C. or less per second.
- the means for cooling is not particularly limited, and can be performed by a conventionally known means. In particular, it is preferable to perform these treatments while sequentially cooling in a plurality of temperature ranges from the viewpoint of improving the dimensional stability of the film.
- the cooling rate is a value obtained by (T1 ⁇ Tg) / t, where T1 is the final heat processing temperature and t is the time until the film reaches Tg from the final heat processing temperature.
- a preferred embodiment of the laminated glass of the present invention comprises a composition for forming a high refractive index layer comprising at least one selected from the group consisting of polyester, polycarbonate and poly (meth) acrylate and metal oxide particles, And forming a high refractive index layer and a low refractive index layer by simultaneous extrusion using a composition for forming a refractive index layer, and sandwiching the infrared shielding film between a pair of intermediate films And a step of sandwiching the infrared shielding film and the intermediate film with a pair of plate glasses.
- a composition for forming a high refractive index layer comprising at least one selected from the group consisting of polyester, polycarbonate and poly (meth) acrylate and metal oxide particles, And forming a high refractive index layer and a low refractive index layer by simultaneous extrusion using a composition for forming a refractive index layer, and sandwiching the infrared shielding film between a pair of intermediate films And a step of sandwich
- the method for producing laminated glass is not particularly limited, and a conventional method for producing laminated glass can be used.
- a conventional method for producing laminated glass can be used.
- an interlayer film, an infrared shielding film, and an interlayer film are sandwiched between two sheets of glass, and the stacked ones are handled through a pressing roll, or preferably placed in a rubber bag and sucked under reduced pressure. Then, the air remaining between the glass plate and the interlayer film is degassed, and if necessary, pre-adhered at about 70 to 110 ° C. to form a laminate, and then the degassed laminate is put into an autoclave or pressed. It can be produced by performing the main bonding at a pressure of about 1 to 1.5 MPa at about 120 to 150 ° C.
- a mixer: KF70, a rotor: a high shear type is installed in a kneading apparatus Laboplast Mill C type (manufactured by Toyo Seiki Seisakusho Co., Ltd.), kneading is performed at a preset temperature of 150 ° C. and 300 rpm, and resin pellets 1 containing zinc oxide fine particles are obtained. Produced. The following materials were added all at once to the mixer so that the content of the metal oxide particles was 50% by mass, and kneaded in a nitrogen atmosphere.
- Resin PMMA resin acrypet VH (Mitsubishi Rayon Co., Ltd.)
- Metal oxide particles Zinc oxide (Taika Co., Ltd., MZ-500, average primary particle size 25 nm, refractive index 1.95) (Preparation of resin pellet 2)
- Resin pellets 2 containing titanium oxide fine particles were produced using the following materials in the same manner as the production method of resin pellets 1. The following materials were added all at once to the mixer so that the content of the metal oxide particles was 50% by mass, and kneaded in a nitrogen atmosphere.
- Resin PMMA resin acrypet VH (Mitsubishi Rayon Co., Ltd.)
- Metal oxide particles Rutile titanium oxide (Ishihara Sangyo Co., Ltd., aluminum hydroxide surface treatment, TTO-55A, particle size 30-50 nm, refractive index 2.60) (Preparation of resin pellet 3)
- Resin pellets 3 containing titanium oxide fine particles were produced using the following materials in the same manner as the production method of resin pellets 1. The following materials were added all at once to the mixer so that the content of the metal oxide particles was 50% by mass, and kneaded in a nitrogen atmosphere.
- Resin PET resin TRN-8580FC (manufactured by Teijin Chemicals Ltd.)
- Metal oxide particles rutile titanium oxide (Ishihara Sangyo Co., Ltd., TTO-55A, aluminum hydroxide surface treatment, particle size 30-50 nm, refractive index 2.60) (Preparation of resin pellet 4)
- Resin pellets 4 containing titanium oxide fine particles were produced using the following materials in the same manner as the resin pellet 1 production method. The following materials were added all at once to the mixer so that the content of the metal oxide particles was 50% by mass, and kneaded in a nitrogen atmosphere.
- Resin Polycarbonate resin Iupilon HL-4000 (Mitsubishi Engineering Plastics)
- Metal oxide particles rutile titanium oxide (Ishihara Sangyo Co., Ltd., TTO-55A, aluminum hydroxide surface-treated product, particle size 30 to 50 nm, refractive index 2.60) (formation of optical film) (infrared shielding film 1 Production)
- PEN polyethylene naphthalate
- PMMA polymethyl methacrylate
- (PMMA (152 nm) / PEN (137 nm)) 64 means that 64 units each having a PMMA having a thickness of 152 nm and a PEN having a thickness of 137 nm stacked in this order are stacked. It is.
- infrared shielding film 2 On a 50 ⁇ m-thick polyethylene terephthalate (PET) film (A4300: double-sided easy-adhesion layer, manufactured by Toyobo Co., Ltd.), the following coating solution for a low refractive index layer and coating solution for a high refractive index layer have a high refractive index.
- Infrared shielding film 2 in which a total of 20 layers were alternately laminated was obtained by sequentially applying multiple layers so as to be a layer (120 nm) / a low refractive index layer (157 nm).
- Coating solution for low refractive index layer a solution prepared by dissolving 10 parts by mass of PMMA Acrypet VH (manufactured by Mitsubishi Rayon Co., Ltd.) in 90 parts by mass of 2-methoxyethyl acetate.
- Coating solution for high refractive index layer 5 parts by mass of resin pellet 1 Liquid dissolved in 95 parts by mass of 2-methoxyethyl acetate (Preparation of infrared shielding film 3)
- the following coating liquid and low refractive index layer for a low refractive index layer are formed on a 50 ⁇ m thick polyethylene terephthalate (PET) film (A4300: double-sided easy adhesion layer, manufactured by Toyobo Co., Ltd.).
- Infrared shielding film 3 having a total thickness of 20 layers was obtained by sequentially applying the coating solution for coating with a high refractive index layer (120 nm) / low refractive index layer (157 nm).
- Low refractive index layer coating solution PMMA Acrypet VH (Mitsubishi Rayon Co., Ltd.) 10 parts by mass dissolved in 2-methoxyethyl acetate 90 parts by mass
- High refractive index layer coating solution Resin pellet 2 5 parts by mass Solution dissolved in 95 parts by mass of 2-methoxyethyl acetate (Preparation of infrared shielding film 4)
- PMMA Acrypet VH manufactured by Mitsubishi Rayon Co., Ltd.
- the layers were stacked and stretched three times in length and three times in width so as to be a high refractive index layer (120 nm) / low refractive index layer (157 nm), and then heat setting and cooling were performed, and a total of 20 layers were alternately laminated.
- An outer shielding film 4 was obtained.
- laminated glass 1 (Comparative Example 1) and laminated glasses 2 to 4 (Examples 1 to 3) were produced by the following method.
- PVB interlayer film 1 mm glass plate with a thickness of 2 mm, polyvinyl butyral (ESLEC B manufactured by Sekisui Chemical Co., Ltd.) interlayer film (0.4 mm) (hereinafter referred to as PVB interlayer film), infrared shielding film, PVB interlayer film, 2 mm thickness
- the inside of the autoclave is returned to atmospheric pressure and room temperature, the laminated body is taken out from the vacuum bag, heated and pressurized to 130 ° C for 30 minutes in the autoclave again, and then returned to room temperature and normal pressure to produce laminated glass. did.
- a 500 W halogen lamp was installed as a light source in a direction perpendicular to the glass surface of the opening (size: 23 ⁇ 26 cm) of this box and in a direction of 30 degrees, and the temperature was increased after 30 minutes. The results are shown in Table 1.
- a 500 W halogen lamp was installed as a light source in a direction perpendicular to the glass surface of the opening (size 23 ⁇ 26 cm) of the box, and the temperature rise after 30 minutes was measured. The results are shown in Table 2.
- the laminated glass of Examples 1 to 3 had a smaller temperature rise than oblique laminated light compared to the laminated glass of Comparative Example 1.
- the curved laminated glasses of Examples 4 to 8 had less temperature rise and less color unevenness than the curved laminated glasses of Comparative Examples 2 and 3.
- the infrared shielding film of the present invention has a high infrared shielding effect independent of the angle of incident light, and is sufficient even when the infrared shielding film of the present invention is used for curved glass. It can be seen that a good infrared shielding effect is obtained, and color unevenness due to reflection of visible light is small.
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Description
高屈折率層は、ポリエステル、ポリカーボネートおよびポリ(メタ)アクリレートの少なくとも1種のポリマーならびに金属酸化物粒子を含む。
金属酸化物粒子としては、金属酸化物を構成する金属が、Li、Na、Mg、Al、Si、K、Ca、Sc、Ti、V、Cr、Mn、Fe、Co、Ni、Cu、Zn、Rb、Sr、Y、Nb、Zr、Mo、Ag、Cd、In、Sn、Sb、Cs、Ba、La、Ta、Hf、W、Ir、Tl、Pb、Bi及び希土類金属からなる群より選ばれる1種または2種以上の金属である金属酸化物を用いることができ、具体的には、例えば、酸化チタン、酸化亜鉛、酸化アルミニウム(アルミナ)、酸化ジルコニウム、酸化ハフニウム、酸化ニオブ、酸化タンタル、酸化マグネシウム、酸化バリウム、酸化インジウム、酸化錫、酸化鉛、これら酸化物より構成される複酸化物であるニオブ酸リチウム、ニオブ酸カリウム、タンタル酸リチウム、アルミニウム・マグネシウム酸化物(MgAl2O4)等の粒子および複合粒子の中で、屈折率が1.6を満たす(屈折率が1.6以上である)ものが挙げられる。
一般的に、酸化チタン粒子は、粒子表面の光触媒活性の抑制や、溶媒等への分散性を向上する目的で、表面処理が施された状態で使用されることが多く、表面処理としては、シリカ、アルミナ、水酸化アルミニウム、ジルコニア等、1種またその2種類以上で処理されているものが好ましい。より具体的には、酸化チタン粒子表面をシリカからなる被覆層で覆われ、粒子表面が負電荷を帯びたものや、アルミニウム酸化物からなる被覆層が形成されたpH8~10で表面が正電荷を帯びたものが知られている。
高屈折率層における金属酸化物粒子の含有量としては、高屈折率層の固形分100質量%に対して、赤外遮蔽の観点および曲面形状のガラスにフィルムを適用した場合の色ムラ低減の観点から、20~80質量%であることが好ましく、30~70質量%であることがより好ましく、40~60質量%であることがさらに好ましい。
高屈折率層は必須にポリマー材料を含む。屈折率層を形成するのがポリマー材料であれば、塗布やスピンコートなどの成膜方法が選択可能となる。これらの方法は簡便であり、基材の耐熱性を問わないので選択肢が広く、特に樹脂基材に対して有効な成膜方法といえる。たとえば塗布型ならばロール・ツー・ロール法などの大量生産方式が採用できて、コスト面でもプロセス時間面でも有利になる。また、ポリマー材料を含む膜はフレキシブル性が高いため、生産時や運搬時に巻き取りを行っても、これらの欠陥が発生しづらく、取扱性に優れているという長所がある。
低屈折率層は、上記ポリマーの欄で記載したように、好適にはポリマーを含む。
赤外遮蔽フィルムには必要により基材を用いてもよい。
本発明の赤外遮蔽フィルムは、高屈折率層と低屈折率層とからなるユニットを少なくとも1つ積層した構成(積層膜)であればよいが、高屈折率層および低屈折率層の総数の上限としては、100層以下、すなわち50ユニット以下であることが好ましい。より好ましくは40層(20ユニット)以下であり、さらに好ましくは20層(10ユニット)以下である。総層数の範囲の下限は特に限定されるものではないが、5層以上であることが好ましい。上述したように、本願のフィルムは高屈折率層に金属酸化物粒子を含むため、従来のポリマー積層形態のフィルムと比較して、積層数が低減され、薄膜とすることができる。層数を減らすことで、生産性が向上し、積層界面での散乱による透明性の減少を抑制することができる。
本発明の赤外遮蔽フィルムは、幅広い分野に応用することができる。例えば、建物の屋外の窓や自動車窓等長期間太陽光に晒らされる設備(基体)に貼り合せ、熱線反射効果を付与する熱線反射フィルム等の窓貼用フィルム、農業用ビニールハウス用フィルム等として、主として耐候性を高める目的で用いられる。特に、本発明に係る赤外遮蔽フィルムが中間膜を介してガラスの基体に貼合されている部材には好適である。
中間膜は、赤外遮蔽フィルムとガラスとを張り合わせる接着性能を有する膜であればいずれの膜も用いることができる。
板ガラスの種類は特に限定されるものではなく、用途に要求される光透過性能や断熱性能によって選択すればよく、無機ガラスであっても有機ガラスであってもよい。
本発明の赤外遮蔽フィルムの製造方法について特に制限はなく、高屈折率層と低屈折率層とから構成されるユニットを少なくとも1つ形成することができるのであれば、いかなる方法でも用いられうる。
本発明の合わせガラスの好適な一実施形態は、ポリエステル、ポリカーボネートおよびポリ(メタ)アクリレートからなる群から選択される少なくとも1種および金属酸化物粒子を含む高屈折率層形成用組成物と、低屈折率層形成用組成物と、を用いて同時押し出しにより高屈折率層および低屈折率層を形成して赤外遮蔽フィルムを得る工程と、前記赤外遮蔽フィルムを一対の中間膜で挟持させ、さらに前記赤外遮蔽フィルムおよび前記中間膜を一対の板ガラスで挟持させる工程と、を含む。赤外遮蔽フィルムを得る工程については、上述のとおりである。
混練装置ラボプラストミルC型(東洋精機製作所社製)に、ミキサー:KF70、ロータ:高せん断型を装着し、設定温度150℃、300rpmで混練を行ない、酸化亜鉛微粒子を含有した樹脂ペレット1を作製した。金属酸化物粒子の含有量が50質量%になるように下記の素材を一括でミキサーに添加し、窒素雰囲気下で混練を行なった。
金属酸化物粒子:酸化亜鉛(テイカ社製、MZ-500、平均一次粒径25nm、屈折率1.95)
(樹脂ペレット2の作製)
樹脂ペレット1の作製方法と同様にして下記の材料を用いて、酸化チタン微粒子を含有した樹脂ペレット2を作製した。金属酸化物粒子の含有量が50質量%になるように下記の材料を一括でミキサーに添加し、窒素雰囲気下で混練を行なった。
金属酸化物粒子:ルチル型酸化チタン(石原産業社製、水酸化アルミニウム表面処理、TTO-55A、粒径30~50nm、屈折率2.60)
(樹脂ペレット3の作製)
樹脂ペレット1の作製方法と同様にして下記の材料を用いて、酸化チタン微粒子を含有した樹脂ペレット3を作製した。金属酸化物粒子の含有量が50質量%になるように下記の材料を一括でミキサーに添加し、窒素雰囲気下で混練を行なった。
金属酸化物粒子:ルチル型酸化チタン(石原産業社製、TTO-55A、水酸化アルミニウム表面処理、粒径30~50nm、屈折率2.60)(樹脂ペレット4の作製)
樹脂ペレット1の作製方法と同様にして下記の材料を用いて、酸化チタン微粒子を含有した樹脂ペレット4を作製した。金属酸化物粒子の含有量が50質量%になるように下記の材料を一括でミキサーに添加し、窒素雰囲気下で混練を行なった。
金属酸化物粒子:ルチル型酸化チタン(石原産業社製、TTO-55A、水酸化アルミニウム表面処理品、粒径30~50nm、屈折率2.60)(光学フィルムの形成)(赤外遮蔽フィルム1の作製)
米国特許第6049419号に記載の溶融押し出し方法に従い、ポリエチレンナフタレート(PEN)TN8065S(帝人化成社製)とポリメチルメタクリレート(PMMA)樹脂アクリペットVH(三菱レイヨン社製)とを、300℃に溶融し、押出しにより積層し、(PMMA(152nm)/PEN(137nm))64/(PMMA(164nm)/PEN(148nm))64/(PMMA(177nm)/PEN(160nm))64/(PMMA(191m)/PEN(173nm))64となるように縦横約3倍に延伸した後、熱固定、冷却を行って、計256層交互積層した赤外遮蔽フィルム1を得た。ここで、上記層構成において、「(PMMA(152nm)/PEN(137nm))64」とは、膜厚152nmのPMMA、膜厚137nmのPENをこの順に積層したユニットを64個積層させたという意味である。
50μm厚みのポリエチレンテレフタレート(PET)フィルム(A4300:両面易接着層、東洋紡社製)上に、下記の低屈折率層用塗布液および高屈折率層用塗布液を、乾燥膜厚が高屈折率層(120nm)/低屈折率層(157nm)となるように逐次重層塗布し、計20層交互積層した赤外遮蔽フィルム2を得た。
高屈折率層用塗布液:樹脂ペレット1 5質量部を酢酸2-メトキシエチル95質量部に溶解させた液
(赤外遮蔽フィルム3の作製)
赤外遮蔽フィルム2と同様の方法で、50μm厚みのポリエチレンテレフタレート(PET)フィルム(A4300:両面易接着層、東洋紡株式会社製)上に、下記の低屈折率層用塗布液および高屈折率層用塗布液を、乾燥膜厚が、高屈折率層(120nm)/低屈折率層(157nm)で逐次重層塗布し、計20層交互積層した赤外遮蔽フィルム3を得た。
高屈折率層用塗布液:樹脂ペレット2 5質量部を酢酸2-メトキシエチル95質量部に溶解させた液
(赤外遮蔽フィルム4の作製)
米国特許第6049419号に記載の溶融押し出し方法に従い、低屈折率層に用いるPMMAアクリペットVH(三菱レイヨン社製)と、高屈折率層に用いるペレット2とを、300℃に溶融し、押出しにより積層し、高屈折率層(120nm)/低屈折率層(157nm)となるように、縦3倍、横3倍に延伸した後、熱固定、冷却を行って、計20層交互積層した赤外遮蔽フィルム4を得た。
米国特許第6049419号に記載の溶融押し出し方法に従い、低屈折率層に用いるPMMAアクリペットVH(三菱レイヨン社製)と、高屈折率層に用いるペレット3とを、300℃に溶融し、押出しにより積層し、高屈折率層(120nm)/低屈折率層(157nm)となるように、縦3倍、横3倍に延伸した後、熱固定、冷却を行って、計20層交互積層した赤外遮蔽フィルム5を得た。
米国特許第6049419号に記載の溶融押し出し方法に従い、低屈折率層に用いるPMMAアクリペットVH(三菱レイヨン社製)と、高屈折率層に用いるペレット4とを、300℃に溶融し、押出しにより積層し、高屈折率層(120nm)/低屈折率層(157nm)となるように、縦3倍、横3倍に延伸した後、熱固定、冷却を行って、計20層交互積層した赤外遮蔽フィルム6を得た。
作製した赤外遮蔽フィルム1~4を用いて、下記の方法により合わせガラス1(比較例1)および合わせガラス2~4(実施例1~3)を作製した。
<遮熱性試験>
作製した合わせガラス1~4を1つの面に取り付けた縦×横×高さ=30×30×33cmの木製の箱の内部に熱電対を設置した。この箱の開口部(サイズ23×26cm)のガラス面に対し垂直方向、および30度方向に光源として500Wハロゲンランプを設置して点灯し、30分後の温度上昇幅を測定した。結果を表1に示す。
(曲面合わせガラス5の作製)
(比較例2)
厚さ2mmの板ガラスを加熱成形した曲率半径0.9mのガラスを用いて、第1ガラス板、PVB中間膜、赤外遮蔽フィルム1、PVB中間膜、第2ガラス板の構成で積層し、実施例1と同様にして曲面合わせガラス5を作製した。
(実施例4)
赤外遮蔽フィルム4を用いた以外は曲面合わせガラス5の作製方法と同様にして、曲面合わせガラス6を作製した。
(実施例5)
赤外遮蔽フィルム5を用いた以外は曲面合わせガラス5の作製方法と同様にして、曲面合わせガラス7を作製した。
(実施例6)
赤外遮蔽フィルム6を用いた以外は曲面合わせガラス5の作製方法と同様にして、曲面合わせガラス8を作製した。
(比較例3)
曲面合わせガラス5の作製において、第2ガラス板側のPVB中間膜に代えてアンチモンドープした平均粒径0.15μmの酸化錫(ATO)微粒子を分散したPVB膜(膜の全質量に対して酸化錫(ATO)微粒子含有量1.0質量%)を用い、それ以外は曲面合わせガラス5と同様の方法で曲面合わせガラス9を作製した。なお、ATO微粒子を分散したPVB膜は、特開平8-259279号の実施例1の記載の方法により製造した。
(実施例7)
曲面合わせガラス6の作製において、第2ガラス側のPVB中間膜に代えてアンチモンドープした平均粒径0.15μmの酸化錫(ATO)微粒子を分散したPVB膜(膜の全質量に対して酸化錫(ATO)微粒子含有量1.0質量%)を用い、それ以外は曲面合わせガラス6と同様の方法で曲面合わせガラス10を作製した。
(実施例8)
曲面合わせガラス8の作製において、第2ガラス側のPVB中間膜に代えてアンチモンドープした平均粒径0.15μmの酸化錫(ATO)微粒子を分散したPVB膜(膜の全質量に対して酸化錫(ATO)微粒子含有量1.0質量%)を用い、それ以外は曲面合わせガラス8と同様の方法で曲面合わせガラス11を作製した。
<色ムラ>
作製した合わせガラス5~11を、目視により表面の色ムラを以下の評価にしたがって評価した。結果を表2に示す。
<遮熱性試験>
作製した合わせガラス5~11を1つの面に取り付けた縦×横×高さ=30×30×33cmの木製の箱の内部に熱電対を設置した。この箱の開口部(サイズ23×26cm)のガラス面に対し垂直方向、に光源として500Wハロゲンランプを設置して点灯し、30分後の温度上昇幅を測定した。結果を表2に示す。
2 中間膜、
3 赤外遮蔽フィルム、
10 熱線反射合わせガラス。
Claims (6)
- 高屈折率層と低屈折率層とを積層したユニットを少なくとも1つ含む赤外遮蔽フィルムであって、
前記高屈折率層が、ポリエステル、ポリカーボネートおよびポリ(メタ)アクリレートからなる群から選択される少なくとも1種ならびに金属酸化物粒子を含むことを特徴とする赤外遮蔽フィルム。 - 前記金属酸化物粒子が酸化チタン粒子である、請求項1に記載の赤外遮蔽フィルム。
- 請求項1または2に記載の赤外遮蔽フィルムと、
前記赤外遮蔽フィルムを挟持する一対の中間膜と、
前記赤外遮蔽フィルムおよび前記中間膜を挟持する一対の板ガラスと、を有する、熱線反射合わせガラス。 - 前記板ガラスが曲面形状である、請求項3に記載の熱線反射合わせガラス。
- 前記中間膜が、平均粒径が0.2μm以下の熱線遮蔽性微粒子を含有する、請求項3または4に記載の熱線反射合わせガラス。
- ポリエステル、ポリカーボネートおよびポリ(メタ)アクリレートからなる群から選択される少なくとも1種および金属酸化物粒子を含む高屈折率層形成用組成物と、低屈折率層形成用組成物と、を用いて同時押し出しにより高屈折率層および低屈折率層を形成して赤外遮蔽フィルムを得る工程と、
前記赤外遮蔽フィルムを一対の中間膜で挟持させ、さらに前記赤外遮蔽フィルムおよび前記中間膜を一対の板ガラスで挟持させる工程と、を含むことを特徴とする、熱線反射合わせガラスの製造方法。
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| EP12863482.1A EP2799917A4 (en) | 2011-12-28 | 2012-12-07 | INFRARED PROTECTIVE FILM, THERMOREFLECTIVE LAMINATED GLASS USING THE SAME, AND PROCESS FOR PRODUCING THE THERMOREFLECTIVE LAMINATE GLASS |
| CN201280063394.4A CN104040384A (zh) | 2011-12-28 | 2012-12-07 | 红外屏蔽膜、使用其的热线反射夹层玻璃、及热线反射夹层玻璃的制造方法 |
| US14/369,486 US20140355107A1 (en) | 2011-12-28 | 2012-12-07 | Infrared shielding film, heat reflective laminated glass using same, and method for producing heat reflective laminated glass |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015151460A1 (ja) * | 2014-03-31 | 2015-10-08 | セーレン株式会社 | 積層シート |
| JP2017179659A (ja) * | 2016-03-30 | 2017-10-05 | 株式会社谷沢製作所 | 遮熱ヘルメット |
| WO2018158914A1 (ja) * | 2017-03-02 | 2018-09-07 | マクセルホールディングス株式会社 | 合わせガラス及びそれに用いる合わせガラス用光学フィルム |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015151460A1 (ja) * | 2014-03-31 | 2015-10-08 | セーレン株式会社 | 積層シート |
| JP5922312B2 (ja) * | 2014-03-31 | 2016-05-24 | セーレン株式会社 | 積層シート |
| JP2017179659A (ja) * | 2016-03-30 | 2017-10-05 | 株式会社谷沢製作所 | 遮熱ヘルメット |
| WO2018158914A1 (ja) * | 2017-03-02 | 2018-09-07 | マクセルホールディングス株式会社 | 合わせガラス及びそれに用いる合わせガラス用光学フィルム |
| JPWO2018158914A1 (ja) * | 2017-03-02 | 2019-12-19 | マクセルホールディングス株式会社 | 合わせガラス及びそれに用いる合わせガラス用光学フィルム |
| JP6618233B1 (ja) * | 2018-02-27 | 2019-12-11 | 日本化薬株式会社 | 熱線遮蔽構造体およびそれを含む合わせガラスならびにそれらの製造方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2799917A4 (en) | 2015-09-02 |
| JPWO2013099564A1 (ja) | 2015-04-30 |
| US20140355107A1 (en) | 2014-12-04 |
| CN104040384A (zh) | 2014-09-10 |
| EP2799917A1 (en) | 2014-11-05 |
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