WO2010098287A1 - 断熱合わせガラス - Google Patents
断熱合わせガラス Download PDFInfo
- Publication number
- WO2010098287A1 WO2010098287A1 PCT/JP2010/052637 JP2010052637W WO2010098287A1 WO 2010098287 A1 WO2010098287 A1 WO 2010098287A1 JP 2010052637 W JP2010052637 W JP 2010052637W WO 2010098287 A1 WO2010098287 A1 WO 2010098287A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- film
- laminated glass
- glass
- infrared
- plastic film
- Prior art date
Links
- 239000005340 laminated glass Substances 0.000 title claims abstract description 91
- 239000011521 glass Substances 0.000 claims abstract description 129
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- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 1
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Images
Classifications
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- B32B17/10807—Making laminated safety glass or glazing; Apparatus therefor
- B32B17/10816—Making laminated safety glass or glazing; Apparatus therefor by pressing
- B32B17/10825—Isostatic pressing, i.e. using non rigid pressure-exerting members against rigid parts
- B32B17/10834—Isostatic pressing, i.e. using non rigid pressure-exerting members against rigid parts using a fluid
- B32B17/10844—Isostatic pressing, i.e. using non rigid pressure-exerting members against rigid parts using a fluid using a membrane between the layered product and the fluid
- B32B17/10853—Isostatic pressing, i.e. using non rigid pressure-exerting members against rigid parts using a fluid using a membrane between the layered product and the fluid the membrane being bag-shaped
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- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
Definitions
- the present invention relates to a laminated glass in which two glass plates are bonded with an intermediate film, and more particularly to a laminated glass having excellent heat insulation.
- heat insulating laminated glass in which conductive ultrafine particles are dispersed in an interlayer film of laminated glass is excellent in heat insulating properties, ultraviolet shielding properties, visible light transmission properties, radio wave transmission properties, etc., for example, at least two transparent sheets
- a laminated glass having an intermediate layer between glass plates a laminated glass in which fine particles having functions such as conductivity of 0.2 ⁇ m or less are dispersed in the intermediate film layer is disclosed in Patent Document 1. Yes.
- an infrared reflection film made of a hologram is bonded to glass, and the film is integrated using an intermediate film in which conductive fine particles are dispersed so that the infrared film is positioned between two glass plates.
- Laminated glass is also disclosed.
- Patent Document 3 discloses a laminated glass in which a first glass plate / intermediate film portion / second glass plate is laminated, and the intermediate film portion has a refractive index between a clear intermediate film and an intermediate film in which fine particles are dispersed.
- a heat insulating laminated glass comprising an optical interference film obtained by laminating a large number of two types of polymer thin films having different types is disclosed. Furthermore, what uses an ultraviolet absorption green glass for the 2nd glass plate is disclosed.
- Patent Document 4 an infrared reflective film made of a dielectric multilayer film is formed on a polymer resin sheet, and the polymer resin sheet is laminated between two plate glasses using an intermediate film. It is disclosed. Furthermore, what uses an infrared rays absorption film for a polymer resin sheet is disclosed.
- Patent Document 5 and Patent Document 6 disclose optical filters produced using infrared absorbing pigments.
- the present invention provides a laminated glass having a high visible light transmittance and a good heat insulating effect against solar radiation.
- the intermediate film portion has a functionality between the two intermediate films.
- a heat insulating laminated glass first glass characterized in that a plastic film is sandwiched and the functional plastic film is composed of an infrared reflecting layer and an infrared absorbing layer.
- the infrared reflection layer is a multilayer film in which high-refractive index oxide films and low-refractive index oxide films are alternately laminated, or two types of polymer thin films having different refractive indexes. It may be a heat insulating laminated glass (second glass) characterized by being a multilayer film formed by lamination or a metal film.
- the first or second glass is a plastic film in which an infrared absorption layer has conductive fine particles dispersed therein, a plastic film in which a resin film in which conductive fine particles are dispersed is formed on the surface of the plastic film, or infrared absorption Even a heat insulating laminated glass (third glass) characterized in that it is a plastic film in which a pigment is dispersed or a plastic film in which a resin film in which an infrared absorbing pigment is dispersed is formed on the surface of a plastic film Good.
- any one of the first to third glasses includes a heat-insulated laminated glass (first glass) characterized in that the intermediate film disposed in contact with the infrared absorbing layer contains conductive fine particles as an infrared absorbing material. 4 glass).
- any one of the first to fourth glasses is characterized in that an intermediate film disposed in contact with the infrared absorbing layer contains a pigment or a dye as an infrared absorbing material, and is characterized by a heat insulating laminated glass (fifth glass). ).
- any one of the first to fifth glasses may be heat-insulated laminated glass (sixth glass) having a visible light transmittance of 70% or more and used for a vehicle window.
- a heat insulating laminated glass used for a vehicle window in which an outdoor glass plate, an intermediate film, a plastic film with an infrared reflecting film, an intermediate film, and an indoor glass plate are laminated in this order.
- the solar radiation transmittance of the outdoor glass plate is 85% or more
- the solar radiation transmittance of the intermediate film used between the outdoor glass plate and the plastic film with the infrared reflective film is 85% or more
- the solar reflectance of the plastic film with an infrared reflective film is 20% or more
- the solar radiation transmittance of the intermediate film used between the plastic film with the infrared reflective film and the indoor side glass plate is 75% or less
- the solar radiation transmittance of the indoor side glass plate is 75% or less
- Insulated laminated glass (seventh glass) is provided.
- the seventh glass may be a heat insulating laminated glass (eighth glass) characterized by having a visible light transmittance of 70% or more.
- the infrared reflective film is a conductive thin film, a multilayer film formed by alternately laminating a high refractive index oxide film and a low refractive index oxide film, or has a different refractive index. It may be a heat insulating laminated glass (9th glass) characterized in that a large number of two types of polymer thin films are alternately laminated.
- any one of the seventh to ninth glasses is a functional ultrafine particle in which an intermediate film disposed on the indoor side of the plastic film with an infrared reflecting film absorbs infrared rays having a particle size of 0.2 ⁇ m or less in the resin film.
- any one of the seventh to ninth glasses may be a heat insulating laminated glass (11th glass) characterized in that the indoor side glass is colored glass.
- any one of the seventh to ninth glasses may be heat insulating laminated glass (twelfth glass) characterized in that the indoor intermediate film is colored.
- the heat-insulated laminated glass according to the first feature of the present invention can provide a window glass having a high visible light transmittance, a low solar light transmittance, and a very good heat insulating performance.
- the heat-insulated laminated glass according to the second feature of the present invention makes it possible to provide a window member that is effective in suppressing the increase in indoor heat caused by solar radiation and reducing the cooling load.
- this glass is a heat insulating laminated glass in which at least two glass plates 1 and 5 are integrated with an intermediate film portion 6.
- the glass plate 1 (outdoor glass plate) has good smoothness, little distortion of the fluoroscopic image, little rigidity and little distortion due to wind and external force, excellent transmission in the visible light region, and relatively low cost. It is easy to use soda lime glass called a transparent type or a clear type with a reduced amount of coloring components such as metal oxides by the float method obtained in (1). Further, it is preferable to use a solar radiation transmittance of 85% or more because a higher performance heat insulating laminated glass can be obtained.
- a soda lime glass called a transparent type or a clear type with a reduced coloring component such as metal oxide by a float method may be used.
- a heat ray absorbing glass colored with a metal oxide or the like whose transmission color is green, blue, bronze, gray or the like is preferably used.
- the glass plate is bent into a curved shape, a plastic film is inserted between the two intermediate films, and the glass plate is integrated in the matching process. Sometimes the plastic film is prone to wrinkles. In some cases, the reflective film peels off.
- a curved glass plate having a curvature radius of 0.9 m to 3 m.
- the range of curvature is 0.9m to 3m because it is difficult to eliminate wrinkles if the curvature is smaller than 0.9m, and if the curvature exceeds 3m, there is no difference from a flat glass plate. It is.
- the intermediate film portion has a functional plastic film 3 sandwiched between two intermediate films 2 and 4, and ethylene vinyl acetate (EVA) or polyvinyl butyral (PVB) is suitably used for the intermediate film.
- EVA ethylene vinyl acetate
- PVB polyvinyl butyral
- the solar transmittance of the intermediate film 2 on the infrared reflecting layer side is set to 85% or more and the solar transmittance of the intermediate film 4 on the infrared absorbing layer side to less than 75%, a higher performance heat insulating laminated glass can be obtained. Therefore, it is preferable.
- the functional plastic film 3 is composed of an infrared reflecting layer 7 and an infrared absorbing layer 8.
- the infrared reflecting layer 7 includes an oxide film having a high refractive index and an oxide film having a low refractive index.
- a multilayer film formed by alternately laminating layers, a multilayer film formed by alternately laminating two types of polymer thin films having different refractive indexes, or a metal film is preferable.
- the multilayer film formed by alternately laminating high refractive index oxide films and low refractive index oxide films includes TiO 2 , Nb 2 O 5 , Ta 2 O 5 , SiO 2 , Al 2 O 3 , ZrO. 2. Two or more kinds of oxides selected from MgF 2 and alternately and repeatedly formed can be used.
- the film formation can be performed by a PVD method, a sputtering method, a CVD method, or the like.
- oxides in particular, a layer having a total of 4 to 11 layers using Nb 2 O 5 or TiO 2 for the high refractive index film and SiO 2 for the low refractive index film is necessary for the heat insulation effect. Infrared reflectance is achieved and transparency is not impaired, which is preferable.
- Multi-layer films made by alternately laminating two types of polymer thin films with different refractive indexes include polymethyl methacrylate, polyethylene, polystyrene, polycarbonate, blends of polyvinylidene fluoride and polymethyl methacrylate, ethylene and unsaturated monocarboxylic acid And a copolymer of styrene and methyl methacrylate, and the like.
- the polymer thin film can be formed by a roll coating method, a flow coating method, a dipping method, or the like.
- a metal film is used for the infrared reflective layer, a metal such as gold, silver, copper, or aluminum can be used, and the film is formed by a sputtering method or the like.
- the infrared absorption layer 8 constituting the functional plastic film 3 includes a plastic film in which conductive fine particles are dispersed, a plastic film in which a resin film in which conductive fine particles are dispersed is formed on the surface, and an infrared absorbing pigment dispersed therein. Or a plastic film having a resin film in which an infrared absorbing pigment is dispersed formed on the surface thereof can be suitably used.
- conductive fine particles fine particles of metal fine particles such as Ag, Al, and Ti, fine particles of metal nitride and metal oxide, and one or more kinds of conductive transparent oxide fine particles such as ITO, ATO, AZO, GZO, and IZO Can be selected and dispersed in a resin that forms a plastic film to form a plastic film in which conductive fine particles are dispersed.
- metal fine particles such as Ag, Al, and Ti
- fine particles of metal nitride and metal oxide fine particles of metal nitride and metal oxide
- conductive transparent oxide fine particles such as ITO, ATO, AZO, GZO, and IZO
- a resin selected from polyethylene terephthalate, polyethylene naphthalate, polycarbonate, polymethyl methacrylate, polyether sulfone, nylon, polyarylate, cycloolefin polymer, and the like is preferable.
- a plastic film is formed using a resin selected from polyethylene terephthalate, polyethylene naphthalate, polycarbonate, polymethyl methacrylate, polyether sulfone, nylon, polyarylate, cycloolefin polymer, and the like, and Ag, Al, Disperse one or more kinds of conductive fine particles selected from metal fine particles such as Ti, metal nitride, metal oxide fine particles, and conductive transparent oxide fine particles such as ITO, ATO, AZO, GZO, and IZO.
- An infrared absorption layer 8 may be formed by forming a thin resin film.
- those using conductive transparent oxide fine particles such as ITO, ATO, AZO, GZO, IZO and the like are desirable because of high visible light transmittance.
- the resin for dispersing the conductive fine particles and the resin forming the plastic film may be the same resin or different resins.
- an acrylic resin may be used as the resin for dispersing the conductive fine particles to form a hard coat layer.
- a plastic film in which a pigment or dye is dispersed or a plastic film in which a resin film in which a pigment or dye is dispersed is formed on the surface can be suitably used.
- pigment or dye known various pigments or various dyes that are generally used can be used, and as various dyes, anthraquinone dyes, azo dyes, acridine dyes, indigoid dyes, etc. Carbon black, red iron oxide, phthalocyanine blue, phthalocyanine green, bitumen, zinc white, azo pigment, selenium pigment, and the like can be used.
- a plastic film is formed by dispersing one or more of the above-mentioned various pigments and various dyes in a resin selected from polyethylene terephthalate, polyethylene naphthalate, polycarbonate, polymethyl methacrylate, polyether sulfone, nylon, polyarylate, cycloolefin polymer, etc.
- the functional plastic 3 is manufactured by forming the infrared reflection layer 7 on the infrared absorption layer 8 using the infrared absorption layer 8 as a substrate. Can do.
- the thickness of the infrared absorption layer 8 is less than 30 ⁇ m, it is difficult to handle the film, and the film tends to curl due to the stress of the infrared reflection film layer 7 and a hard coat film described later, while the thickness of the infrared absorption layer 8 is 200 ⁇ m. If it is thicker, an appearance defect due to poor deaeration occurs at the time of bonding processing, so the thickness of the infrared absorbing layer 8 is preferably 30 ⁇ m to 200 ⁇ m.
- the intermediate film 4 used between the infrared absorption layer 8 and the glass 5, that is, the intermediate film 4 disposed in contact with the infrared absorption layer 8, contains conductive fine particles as an infrared absorbing material, further heat insulating laminated glass. This is preferable because it improves the heat insulation property.
- an intermediate film 4 colored by selecting one or more of the various pigments and dyes described above, since the heat insulation is improved.
- the visible light transmittance specified in JIS R3212: 1998 can be used for a window required for driving an automobile, which is preferable.
- Example 1 As shown in FIG. 1, a flat heat insulating laminated glass 10 in which a glass plate 1, an intermediate film 2, a functional plastic film 3, an intermediate film 4, and a glass plate 5 were sequentially laminated was produced.
- the glass plate 1 was a transparent float glass having a thickness of 2 mm, and the glass plate 5 was a green heat ray absorbing glass having a thickness of 2 mm.
- As the intermediate films 2 and 4 a colorless and transparent PVB film having a thickness of 0.38 mm was used.
- the functional plastic film 3 was produced as follows.
- ITO tin-doped indium oxide
- an infrared reflecting layer 7 made of a dielectric multilayer film having a different refractive index was formed on the surface of the plastic film where the hard coat film was not formed.
- a heat-insulated laminated glass was produced by the following procedure.
- Procedure 1 The glass plate 1, the intermediate film 2, the functional plastic film 3, the intermediate film 4, and the glass plate 5 were laminated
- the surface of the functional plastic film on which the hard coat film mainly composed of an acrylic resin in which ITO fine particles are dispersed that is, the infrared absorption layer 8 is refracted toward the glass plate 5 made of green heat-absorbing glass.
- the functional plastic film 3 was arranged so that the infrared reflection layer 7 composed of dielectric multilayer films having different rates was on the glass plate 1 side.
- Procedure 2 Glass plate 1, intermediate film 2, functional plastic film 3, intermediate film 4 and glass plate 5 are laminated in this order in step 1, and the stacked ones are put in a vacuum bag and vacuum bag is used with a vacuum pump. The inside was evacuated and decompressed.
- Procedure 3 The vacuum bag whose pressure was reduced in Procedure 2 was placed in an autoclave and heated and pressurized at 90 ° C. for 30 minutes.
- Step 4 Return the autoclave to atmospheric pressure and room temperature, take out the vacuum bag from the autoclave, return the vacuum bag to atmospheric pressure, and from the vacuum bag, glass plate 1, intermediate film 2, functional plastic film 3, intermediate film 4. The laminated glass integrated with the glass plate 5 was taken out.
- Step 5 Place this laminated glass in the autoclave again, heat and press at 130 ° C. for 30 minutes, then return the inside of the autoclave to atmospheric pressure and room temperature, take out the laminated glass from the autoclave, and insulate the heat of the present invention Glass was used.
- the solar radiation transmittance of the heat insulating laminated glass of this example was 45.7%, and the visible light transmittance was 76.7%.
- Example 2 A transparent float glass with a thickness of 2 mm and a green heat-absorbing glass with a thickness of 2 mm are cut into the shape of an automotive windshield (upper side about 1000 mm, lower side about 1500 mm, height about 900 mm), and heated above the softening point.
- a bent glass having the same shape was produced by bending the glass plate 1, a bent glass made of transparent float glass was used for the glass plate 1, and a bent glass made of green heat-absorbing glass was used for the glass plate 5.
- Example 2 a colorless and transparent PVB film having the same thickness of 0.38 mm as in Example 1 was used for the intermediate film 2, and a thickness of 0. 0 in which tin oxide (ATO) fine particles doped with antimony were dispersed in the intermediate film 4.
- a 76 mm transparent PVB membrane was used.
- the infrared ray absorbing layer 8 of the functional plastic film 3 has a thickness of 5 ⁇ m after curing a hard coat film mainly composed of an acrylic resin in which ATO fine particles are dispersed on the surface of a transparent PET film having a thickness of 80 ⁇ m. It was applied by a roll coating method.
- a dielectric multilayer film having a different refractive index was formed on the hard coat film to form the infrared reflective layer 7.
- the dielectric multilayer films having different refractive indexes are NbO film (thickness 115 nm), SiO 2 film (thickness 175 nm), NbO film (thickness 115 nm), SiO 2 film (thickness 175 nm), Nb 2 O 5 film. (Thickness: 115 nm) was formed by sequential sputtering.
- the infrared absorbing layer 8 is on the side of the glass plate 5 made of green heat-absorbing glass, and the infrared reflecting layer 7 made of a dielectric multilayer film having a different refractive index is on the side of the glass plate 1.
- the functional plastic film 3 was arrange
- the solar radiation transmittance of the heat insulating laminated glass of this example was 44.0%, and the visible light transmittance was 75.6%.
- Example 3 The glass 1, the intermediate film 2, the functional plastic film 3, the intermediate film 4, and the glass 5 are the same as in Example 1 except that a PET film in which ITO fine particles are dispersed as a filler is used for the infrared absorption layer 8.
- the produced heat-insulating laminated glass had a solar transmittance of 44.2% and a visible light transmittance of 74.5%.
- the heat insulation laminated glass of this invention is a laminated glass laminated
- FIG. 3 schematically shows the structure of the laminated glass of the present invention.
- the solar radiation transmittance is a value calculated based on JIS R3106: 1998.
- a soda lime glass plate manufactured by a float process having a solar transmittance of 85% or more, a tempered glass plate reinforced with them, and a bent glass plate bent are preferably used.
- ethylene vinyl acetate (EVA) or polyvinyl butyral (PVB) is preferably used.
- EVA ethylene vinyl acetate
- PVB polyvinyl butyral
- the solar radiation transmittance of the outdoor intermediate film is desirably 85% or more.
- the plastic film with an infrared reflecting film is formed by forming an infrared reflecting film on a transparent plastic film, and the solar reflectance of the plastic film with an infrared reflecting film is preferably 20% or more.
- a plastic film made of a resin selected from polyethylene terephthalate, polyethylene naphthalate, polycarbonate, polymethyl methacrylate, polyether sulfone, nylon, polyarylate, cycloolefin polymer, and the like is suitably used as the plastic film of the infrared reflective plastic film. It is done.
- the thickness of the plastic film is less than 30 ⁇ m, it is difficult to handle the film, and it is easy to curl due to the stress of the infrared reflecting film or the hard coat film described later. In order to come out, the thickness is desirably 30 ⁇ m to 200 ⁇ m.
- the glass plate In the laminated glass of curved shape used for windows of automobiles, etc., the glass plate is bent into a curved shape, so when a plastic film is inserted between two intermediate films and the glass plate is integrated in the matching process Wrinkles tend to occur on plastic films. In some cases, the reflective film peels off.
- the plastic film satisfies any of the following conditions (A), (B), (C): It is preferable to satisfy.
- the range of curvature is 0.9m to 3m. If the curvature is less than 0.9m, it will be difficult to eliminate wrinkles. If the curvature exceeds 3m, there will be no difference from a flat glass plate. This is because it is not necessary to satisfy the conditions (A), (B), and (C).
- the thermal shrinkage of the plastic film with an infrared reflecting film is in the range of 0.5 to 3% in the temperature range of 90 to 150 ° C.
- the elastic modulus of the plastic film is in the range of 30 MPa to 2000 MPa in the temperature range of 90 to 150 ° C.
- the plastic film with an infrared reflective film has a thermal shrinkage rate of less than 0.5% at 90 to 150 ° C, the film with the infrared reflective film will bump around the curved glass and cause wrinkled appearance defects. To do.
- the thermal shrinkage rate is greater than 3%, the infrared reflective film cannot withstand the shrinkage of the film, and an appearance defect that cracks and becomes a crack occurs.
- the thermal contraction rate of the plastic film with the infrared reflective film is in the temperature range of 90 to 150 ° C.
- the thermal shrinkage rate at 90 to 150 ° C. of the plastic film with an infrared reflecting film is preferably in the range of 0.5 to 2%.
- a plastic film produced by a stretching method such as a sequential biaxial stretching method is preferably used because stress at the time of film formation remains in the film and the stress is relaxed and easily contracted by heat treatment. be able to.
- the plastic film has an elastic modulus in a temperature range of 90 to 150 ° C. 30 MPa to 2000 MPa, more preferably 30 MPa to 500 MPa.
- the elastic modulus of the plastic film can be obtained from a stress-strain curve in a temperature range of 90 to 150 ° C. using a viscoelasticity measuring device. If the elastic modulus of the plastic film is less than 30 MPa, the film is easily deformed by a slight external force, and a wrinkled appearance defect is likely to occur on the entire surface of the laminated glass. Also, if the elastic modulus of the plastic film is greater than 2000 MPa, when applied to three-dimensionally curved glass, the air between the intermediate film and the plastic film is not completely removed in the high-temperature and high-pressure treatment by the autoclave, and deaeration It tends to be defective.
- the elongation rate of the plastic film is in a high temperature range of 90 to 150 ° C.
- the elongation is preferably 0.3% or less.
- the tensile force of 10N applied per 1m width of the plastic film is such that when the plastic film sandwiched between the intermediate films is made high temperature and high pressure by an autoclave and the plastic film and the glass plate are thermally fused by the intermediate film, the plastic film This corresponds to the tensile force that is generated to cause the plastic film to stretch.
- the elongation percentage of the plastic film is measured by the following procedures 1 to 5.
- Procedure 1 Cut out a plastic film into a length of 15 mm and a width of 5 mm to obtain a measurement sample.
- Fixing jigs are attached to both ends of the measurement sample, and the length of the measurement sample exposed between the both-end fixing jigs is set to 10 mm.
- Procedure 2 A load of 10 N tensile force is applied to a 1 m width of the plastic film on the sample for measurement. In the case of the measurement sample shown in Procedure 1, a load of 0.05 N is applied.
- Procedure 3 Measure the length L0 of the measurement sample between the jigs for fixing.
- Procedure 4 Heat to a predetermined measurement temperature between 90 and 150 ° C. at 5 ° C./min, and measure the length L between the fixing jigs of the measurement sample at the measurement temperature.
- Procedure 5 Calculate the percent elongation (%) by (L0-L) / L ⁇ 100.
- membrane of the silane coupling agent is formed in the surface in which the infrared reflective film of the plastic film with an infrared reflective film is not formed.
- the silane coupling agent is used to improve the adhesion between the plastic film surface of the plastic film with an infrared reflective film and the intermediate film, and a silane coupling agent having an amino group, an isocyanate group, an epoxy group, or the like is used. Can do.
- a hard coat film is formed between the plastic film of the plastic film with the infrared reflective film and the infrared reflective film.
- the conductive thin film is a metal or alloy such as Ag, Au, Cu, Al, Pd, Pt, Sn, In, Zn, Ti, Cd, Fe, Co, Cr, or Ni.
- a metal film or an alloy film made of, etc., or a conductive metal oxide made of antimony-doped tin oxide, tin-doped indium oxide, or the like is preferably used.
- a dielectric multilayer film having a different refractive index or a resin multilayer film having a different refractive index as an infrared reflecting film laminated on the plastic film because it transmits electromagnetic waves used in broadcasting and communication.
- a dielectric multilayer film having a different refractive index or a resin multilayer film having a different refractive index is a multilayer film in which a laminated film having a refractive index n1 and a laminated film having a refractive index n2 are alternately laminated.
- a multilayer film formed by alternately stacking a high refractive index oxide film and a low refractive index oxide film is used as the infrared reflective film
- a film made of at least one dielectric selected from Al 2 O 3 , ZrO 2 , and MgF 2 is preferably used.
- SiO 2 is used for a film having a low refractive index and one or more kinds of dielectrics selected from TiO 2 , Nb 2 O 5 , and Ta 2 O 5 are used for a film having a high refractive index
- 4 to 11 A multilayer film of layers is preferable because a suitable infrared reflection film that reflects near infrared rays can be formed.
- the infrared reflective film made of a dielectric film has a dielectric film of 4 layers or more and 11 layers or less so as to satisfy the following conditions (1) and (2). It is desirable to have a maximum value of reflection exceeding 50% in a wavelength range of 900 nm to 1400 nm.
- the maximum value of the refractive index of the even-numbered layer is n emax
- the minimum value is n emin
- the maximum value of the refractive index of the odd-numbered layer is no max
- the minimum value is when the n omin, n emax ⁇ n omin or n omax ⁇ n emin.
- a multilayer film consisting of two types of polymer thin films with different refractive indexes alternately laminated is used as a heat ray reflective film
- polyethylene terephthalate, polyethylene naphthalate, polycarbonate, polymethyl methacrylate, polyether sulfone, nylon, polyarylate, cycloolefin A polymer or the like is preferably used, and the total number of multilayer films in which two types of polymer layers are alternately laminated is preferably 50 to 200 layers.
- the indoor interlayer film is a film made of ethylene vinyl acetate (EVA) or polyvinyl butyral (PVB), which contains fine particles that absorb various types of infrared rays within the range that does not impair the visible light transmittance, or contains pigments. It is preferable that the solar transmittance is 75% or less by coloring.
- EVA ethylene vinyl acetate
- PVB polyvinyl butyral
- fine particles that absorb infrared rays include fine metal particles such as Ag, Al, and Ti, fine particles of metal nitride and metal oxide, and conductive transparent oxide fine particles such as ITO, ATO, AZO, GZO, and IZO. One or more of these can be selected and contained in the indoor intermediate film 16 to improve the heat insulation performance.
- conductive transparent oxide fine particles such as ITO, ATO, AZO, GZO, and IZO are desirable.
- EVA or PVB When coloring EVA or PVB, known various pigments or various dyes that are generally used can be used as the colorant.
- Various dyes include anthraquinone dyes, azo dyes, acridine dyes, indigoid dyes, and various pigments include carbon black, red iron oxide, phthalocyanine blue, phthalocyanine green, bitumen, zinc white, azo pigments, selenium pigments. Etc. can be used.
- a laminate of a colored polyvinyl acetal film obtained by coloring a polyvinyl acetal film with the dye or pigment and EVA or PVB may be used as the indoor intermediate film.
- heat ray absorbing glass having a solar radiation transmittance of less than 75%, such as a green color, a blue color, a bronze color, and a gray color, can be suitably used.
- the said heat ray absorption glass is produced by including metals, such as Ce, Co, Ti, Fe, Se, and Cr, in clear glass.
- green glass is particularly preferable because it has an effect of shielding ultraviolet rays harmful to the human body.
- the surface of the intermediate film is embossed in a concavo-convex shape so as not to cause devitrification and bubble defects due to poor deaeration during the alignment process.
- Such an intermediate film having an embossed surface is difficult to perform optical measurement because light is scattered on the surface.
- the embossed interlayer film is sandwiched between PET films, and both sides are sandwiched between flat glass plates, packed in a bag, and the air in the bag is sucked in the same way as in the production of laminated glass.
- the PET film is peeled off from the intermediate film to prepare a sample with a flat intermediate film.
- the visible light transmittance The solar radiation transmittance is calculated in the same manner as the glass plate by a method based on JIS R3106: 1998.
- the visible light transmittance of JIS R3106 is 70% or more, a bright room is obtained and good visibility is obtained, which is preferable. Furthermore, by setting the visible light transmittance specified in JIS R3212: 1998 to 70% or more, it can be used for a window required for driving an automobile, which is preferable.
- Example 1 A flat heat insulating laminated glass 11 having the configuration shown in FIG. 3 was produced.
- the outdoor glass plate 13 was a transparent float glass having a thickness of 3 mm. This glass plate has a solar transmittance Te of 85.8% and a visible light transmittance Tv of 90.4%. Met.
- the room side glass plate 17 was made of green heat ray absorbing glass having a thickness of 3 mm. This glass plate has a solar transmittance Te of 62.7% and a visible light transmittance Tv of 81.2%. Met.
- the outdoor intermediate film 14 a colorless and transparent PVB film having a thickness of 0.38 mm was used.
- the interlayer film had a solar transmittance Te of 90.8% and a visible light transmittance Tv of 94.3%.
- the indoor intermediate film 16 is a PVB film having a thickness of 0.76 mm in which ITO fine particles are dispersed in the film.
- the interlayer film had a solar transmittance Te of 64.3% and a visible light transmittance Tv of 82.5%.
- the surface of the PVB film used for the outdoor side intermediate film 14 and the indoor side intermediate film 16 before the production of the laminated glass is embossed in a concavo-convex shape, so the PVB film is sandwiched between PET films Then, both sides were sandwiched between glass plates with a thickness of 3 mm, packed in a bag, and while the air in the bag was sucked, the autoclave was pressed and heated in the same manner as in the production of laminated glass. Thereafter, the PET film was peeled off from the PVB film to prepare a sample of an intermediate film having a flat surface so that optical measurement was possible.
- the visible light transmittance and the solar radiation transmittance of the PVB film were calculated by a method based on JIS R3106: 1998.
- the plastic film 15 with an infrared reflective film includes an TiO 2 film (thickness 105 nm), an SiO 2 film (thickness 175 nm), and a TiO 2 film (thickness) as an infrared reflective film composed of dielectric multilayer films having different refractive indexes.
- 105 nm), a SiO 2 film (thickness 175 nm), and a TiO 2 film (thickness 105 nm) were sequentially formed by sputtering.
- the solar reflectance of this plastic film with an infrared reflective film was 35.5%.
- the outdoor intermediate film, the plastic film with an infrared reflecting film, the indoor intermediate film, and the indoor glass was produced by the following procedure.
- Procedure 1 The plastic film 15 with a heat ray reflective film was placed between the outdoor intermediate film 14 and the indoor intermediate film 16 and laminated.
- Procedure 2 The three-layer film laminated in Procedure 1 is passed between two heat rolls, heated and pressurized, and the outdoor intermediate film 14, the plastic film 15 with a heat ray reflective film, and the indoor intermediate film 16 are integrated. Thus, an intermediate film having a three-layer structure was produced.
- Step 3 The intermediate film of the three-layer structure prepared in Step 2 is overlaid on the outdoor glass plate 13, and the indoor side glass plate 17 is overlaid on the intermediate film of the three-layer structure, put in a vacuum bag,
- the vacuum bag was evacuated using a vacuum pump connected to the vacuum bag with a tube.
- Procedure 4 The evacuated vacuum bag was placed in an autoclave, heated to 90 ° C. for 30 minutes, pressure degassed and combined.
- Procedure 5 The inside of the autoclave was returned to atmospheric pressure and room temperature, the vacuum bag was taken out from the autoclave, the inside of the vacuum bag was returned to atmospheric pressure, and the heat insulating laminated glass was taken out from the vacuum bag.
- Procedure 7 The inside of the autoclave was returned to atmospheric pressure and room temperature, and the heat insulating laminated glass of the present invention was taken out from the autoclave.
- the heat-insulated laminated glass thus produced had a solar transmittance of 37.8% and a visible light transmittance of 70.1%.
- Example 2 A curved heat insulating laminated glass 12 having the configuration shown in FIG. 4 was produced.
- the outdoor glass plate 20 was a transparent float glass having a thickness of 2 mm. This glass plate has a solar transmittance Te of 87.8% and a visible light transmittance Tv of 90.8%. Met.
- the indoor side glass plate 24 was made of green heat ray absorbing glass having a thickness of 2 mm.
- the solar transmittance Te of this glass plate was 70.7%, and the visible light transmittance Tv was 84.6%.
- the two glass plates were cut into a substantially trapezoidal shape (upper side: about 1000 mm, lower side: about 1500 mm, height: about 900 mm), heated above the softening point, and bent to produce bent glass 20, 24 having the same shape.
- the curvature radius of the curved surface shape was a minimum value of 0.9 m and a maximum value of 1 m.
- an infrared reflecting film made of a dielectric multilayer film similar to that of Example 1 was formed on a PET film having a thickness of 50 ⁇ m to obtain a plastic film 22 with an infrared reflecting film. ⁇
- the thermal shrinkage of this plastic film 22 with an infrared reflecting film was 1.5% in the MD direction and 1% in the TD direction.
- a heat-insulated laminated glass was produced in the same manner as in Example 2 except that this plastic film 22 with an infrared reflecting film and bent glasses 20 and 24 were used.
- reference numerals 21 and 23 denote an outdoor intermediate film and an indoor intermediate film, respectively.
- the heat shrinkage rate was measured as follows according to JIS C2318.
- a strip-shaped film 30 having a length of 150 mm and a width of 40 mm was cut out, and a marked line was marked with a diamond pen at a distance of about 100 mm in the vicinity of the center of each width direction. After marking the marked line, the strip-shaped film 30 was divided into two equal parts of 150 mm ⁇ 20 mm.
- One of the two test pieces was suspended vertically in a hot air circulating thermostat, heated to a measurement temperature of 130 ° C. at a temperature increase rate of about 5 ° C./min, and held at a measurement temperature of 130 ° C. for about 30 minutes. .
- the hot air circulating thermostat was opened to the atmosphere, naturally cooled at about 20 ° C./min, and further maintained at room temperature for 30 minutes.
- thermocouple thermometer was used to measure the temperature, and the temperature distribution in the hot air circulating thermostat was set within ⁇ 1 ° C.
- the distances L1 and L2 between the marked lines were determined using a scanning laser microscope 1LM21D manufactured by Lasertec Corporation. It was measured.
- the thermal shrinkage rate (%) was calculated by (L1-L2) / L1 ⁇ 100.
- the produced heat-insulated laminated glass 12 was free from wrinkles of the plastic film with a heat ray reflective film and cracks in the infrared reflective film, and a heat-insulated laminated glass having a good appearance was obtained. Moreover, the solar radiation transmittance of the produced heat-insulated laminated glass was 42.2%, and the visible light transmittance was 79.5%.
- Example 3 The elongation measured in a state where a plastic film with a heat ray reflective film was loaded with a tensile force of 10 N per 1 m of the film width at a measurement temperature of 130 ° C. was 0.02% in the MD direction and 0.13 in the TD direction.
- a heat-insulated laminated glass was produced in the same manner as in Example 2 except that a PET film having a thickness of 100 ⁇ m was used.
- a curved heat-insulated laminated glass having a good appearance without a wrinkle of a plastic film with a heat ray reflective film or a crack of an infrared reflective film was obtained.
- Example 4 A PET film having a thickness of 100 ⁇ m is used as the plastic film, an acrylic hard coat layer is laminated on both sides of the plastic film at a thickness of 5 ⁇ m, and the plastic film having the hard coat layer is formed on one side.
- a heat-insulated laminated glass was produced in the same manner as in Example 2 except that the same heat ray reflective film was formed.
- the elastic modulus at 130 ° C. of the infrared film-coated plastic film on which the hard coat layer was formed was 1000 MPa.
- a curved heat-insulated laminated glass having a good appearance without a wrinkle of a plastic film with a heat ray reflective film or a crack of an infrared reflective film was obtained.
- Comparative Example 1 Laminated glass was produced in the same manner as in Example 1 except that a PET film without an infrared reflecting film was used instead of the plastic film 15 with an infrared reflecting film.
- the solar radiation transmittance of this laminated glass was 47.2%, and the solar radiation transmittance was large and the heat insulating performance was inferior compared with Example 1 using the plastic film with an infrared reflecting film.
- the indoor side glass plate 17 is made of the same 3 mm-thick transparent float glass as the outdoor side glass plate 13 (the solar transmittance Te is 85.8% and the visible light transmittance Tv is 90.4%).
- a laminated glass was produced in the same manner as in Example 1 except that the same transparent and colorless PVB as that of the outdoor intermediate film 14 was used for the intermediate film 16.
- the solar transmittance of this laminated glass was 60.8%, which was larger than that of Example 1 and inferior in heat insulation performance.
- Comparative Example 3 A heat-insulated laminated glass was produced in the same manner as in Example 2 except that the infrared reflective film made of a dielectric multilayer film was not used.
- the solar transmittance of this laminated glass was 50.2%, which was higher than that of Example 2 and inferior in heat insulation performance.
- Comparative Example 4 A heat-insulated laminated glass was produced in the same manner as in Example 2 except that the same glass plate as the bent glass 20 was used as the bent glass 24.
- the solar transmittance of this laminated glass was 53.0%, which was higher than that of Example 2 and inferior in heat insulation performance.
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Abstract
Description
(1)室外側ガラス板の日射透過率が85%以上であり、
(2)室外側ガラス板と赤外線反射膜付きプラスチックフィルムとの間に用いられる中間膜の日射透過率が85%以上であり、
(3)赤外線反射膜付きプラスチックフィルムの日射反射率が20%以上であり、
(4)赤外線反射膜付きプラスチックフィルムと室内側ガラス板との間に用いられる中間膜の日射透過率が75%以下であり、
(5)室内側ガラス板の日射透過率が75%以下であること、
を特徴とする断熱合わせガラス(第7ガラス)が提供される。
図1に示すような、ガラス板1、中間膜2、機能性プラスチックフィルム3、中間膜4、ガラス板5を順次積層した、平らな断熱性合わせガラス10を作製した。
厚さ2mmの透明なフロートガラスと厚さ2mmのグリーン系の熱線吸収ガラスを、自動車のフロントガラスの形状(上辺約1000mm、下辺約1500mm、高さ約900mm)に切り出し、軟化点以上に加熱して曲げ加工して、同じ形状の曲げガラスを作製し、透明なフロートガラスでなる曲げガラスをガラス板1に用い、グリーン系の熱線吸収ガラスでなる曲げガラスをガラス板5に用いた。
赤外線吸収層8に、ITO微粒子をフィラーとして分散させたPETフィルムを用いた他は、全て実施例1と同様にして、ガラス1、中間膜2、機能性プラスチックフィルム3、中間膜4、ガラス5を順次積層した、平らな断熱性合わせガラスを作製した。
図3に示す構成の、平らな断熱合わせガラス11を作製した。
作製した断熱合わせガラスの日射透過率は37.8%、可視光線透過率は70.1%であった。
図4に示す構成の曲面形状の断熱合わせガラス12を作製した。室外側ガラス板20には、厚さ2mmの透明なフロートガラスを用いた。このガラス板の日射透過率Teは87.8%、可視光透過率Tvは90.8%。であった。
熱線反射膜付きプラスチックフィルムに、測定温度130℃で、フィルムの幅1mあたりに10Nの引張力を負荷した状態で測定された伸び率が、MD方向で0.02%、TD方向で0.13%の、厚さ100μmのPETフィルムを用いた他は、すべて実施例2と同様にして、断熱合わせガラスを作製した。
プラスチックフィルムに厚さ100μmのPETフィルムを用い、プラスチックフィルムの両面に、アクリル系のハードコート層を厚さ5μmで積層し、さらに、ハードコート層を形成したプラスチックフィルムの片面に、実施例1と同様の熱線反射膜を形成した他は、すべて実施例2と同様にして、断熱合わせガラスを作製した。
赤外線反射膜付きプラスチックフィル15の代わりに、赤外線反射膜の形成されていないPETフィルムを用いた他は、全て実施例1と同様にして合わせガラスを作製した。
室内側ガラス板17に、室外側ガラス板13と同じ、厚さ3mmの透明なフロートガラス(日射透過率Teは85.8%、可視光透過率Tvは90.4%)を用い、室内側中間膜16に室外側中間膜14と同じ無色透明のPVBを用いた他は、全て実施例1と同様にして合わせガラスを作製した。
誘電体多層膜でなる赤外線反射膜を用いない他は、全て実施例2と同様にして、断熱合わせガラスを作製した。
曲げガラス24を曲げガラス20と同じガラス板を用いたほかは全て実施例2と同様にして、断熱合わせガラスを作製した。この合わせガラスの日射透過率は53.0%で、実施例2に比較し、日射透過率が大きく、断熱性能の劣るものであった。
Claims (6)
- 少なくとも2枚のガラスを熱可塑性の樹脂でなる中間膜部で積層されてなる合わせガラスにおいて、中間膜部が2枚の中間膜の間に機能性プラスチックフィルムを挟持してなり、該機能性プラスチックフィルムが赤外線反射層と赤外線吸収層とでなることを特徴とする断熱合わせガラス。
- 赤外線反射層が、高屈折率の酸化物膜と低屈折率の酸化物膜とを交互に積層してなる多層膜、もしくは屈折率の異なる2種類のポリマー薄膜を交互に多数積層してなる多層膜、 もしくは金属膜であることを特徴とする請求項1に記載の断熱合わせガラス。
- 赤外線吸収層が、導電性微粒子を分散させてなるプラスチックフィルム、もしくは導電性微粒子を分散させた樹脂膜が表面に形成されてなるプラスチックフィルム、もしくは赤外線吸収顔料が分散されてなるプラスチックフィルム、もしくは赤外線吸収顔料を分散させた樹脂膜が表面に形成されてなるプラスチックフィルムであることを特徴とする請求項1又は請求項2に記載の断熱性合わせガラス。
- 赤外線吸収層に接して配置される中間膜が、赤外線の吸収材として導電性微粒子を含有してなることを特徴とする請求項1乃至請求項3のいずれか1つに記載の断熱合わせガラス。
- 赤外線吸収層に接して配置される中間膜が、赤外線の吸収材として顔料または染料を含有してなることを特徴とする請求項1乃至請求項4のいずれか1つに記載の断熱合わせガラス。
- 可視光線透過率が70%以上であり、車両用窓に使用されることを特徴とする請求項1乃至請求項5のいずれか1つに記載の断熱合わせガラス。
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Also Published As
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CN102333739A (zh) | 2012-01-25 |
JP2010222233A (ja) | 2010-10-07 |
US20110300356A1 (en) | 2011-12-08 |
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