WO2018221359A1 - 波長選択透過性ガラス物品 - Google Patents

波長選択透過性ガラス物品 Download PDF

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Publication number
WO2018221359A1
WO2018221359A1 PCT/JP2018/019911 JP2018019911W WO2018221359A1 WO 2018221359 A1 WO2018221359 A1 WO 2018221359A1 JP 2018019911 W JP2018019911 W JP 2018019911W WO 2018221359 A1 WO2018221359 A1 WO 2018221359A1
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WIPO (PCT)
Prior art keywords
glass
wavelength
less
selective transmission
wavelength selective
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Application number
PCT/JP2018/019911
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English (en)
French (fr)
Japanese (ja)
Inventor
久美子 諏訪
学 西沢
小池　章夫
伯人 中沢
奈緒子 岡田
一男 坪田
Original Assignee
Ａｇｃ株式会社
株式会社坪田ラボ
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Application filed by Ａｇｃ株式会社, 株式会社坪田ラボ filed Critical Ａｇｃ株式会社
Publication of WO2018221359A1 publication Critical patent/WO2018221359A1/ja

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    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
    • C03C17/36—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C27/00—Joining pieces of glass to pieces of other inorganic material; Joining glass to glass other than by fusing
    • C03C27/06—Joining glass to glass by processes other than fusing
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/083—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound
    • C03C3/085—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/083—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound
    • C03C3/085—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal
    • C03C3/087—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal containing calcium oxide, e.g. common sheet or container glass
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/089—Glass compositions containing silica with 40% to 90% silica, by weight containing boron
    • C03C3/091—Glass compositions containing silica with 40% to 90% silica, by weight containing boron containing aluminium
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/095—Glass compositions containing silica with 40% to 90% silica, by weight containing rare earths
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C4/00—Compositions for glass with special properties
    • C03C4/08—Compositions for glass with special properties for glass selectively absorbing radiation of specified wave lengths
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/24—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/22—Absorbing filters
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/26—Reflecting filters

Definitions

  • the present invention relates to a wavelength-selective transmissive glass article that transmits light in a wavelength region of 360 to 400 nm (hereinafter referred to as “specific wavelength light”) and has excellent heat shielding properties.
  • the wavelength-selective transmissive glass article of the present invention has three types of forms: a single plate glass, a laminated glass, and a multi-layer glass, depending on the application.
  • General window glass transmits ultraviolet rays to some extent. Therefore, in the room where direct sunlight enters, it gradually tans.
  • an ultraviolet absorbing glass containing ions that absorb ultraviolet rays or a glass having a film containing an ultraviolet absorber is used.
  • Patent Document 1 describes a glass plate with an ultraviolet shielding layer in which an ultraviolet shielding layer is provided on glass having a light transmittance of 61% at a wavelength of 400 nm so that the transmittance of light at a wavelength of 400 nm is 3% or less. .
  • UV rays are considered harmful because they cause sunburn on the skin, inflammation of the eyes, deterioration of the polymer material, and the like, but the above-mentioned specific wavelength light is also said to be effective in suppressing myopia progression.
  • conventional UV-absorbing glass has been designed to absorb the entire light having a wavelength of 400 nm or less.
  • Myopia includes refractive myopia and axial myopia, and many are axial myopia.
  • myopia progresses with the extension of the axial length, and the extension is irreversible.
  • children's outdoor activities that is, outdoor activities under long-term sunlight, can be a factor that suppresses the progress of myopia.
  • eyes receive various damages by receiving ultraviolet rays.
  • UVB ultraviolet light having a wavelength of 280 to 315 nm
  • UVB ultraviolet light having a wavelength of 280 to 315 nm
  • the present invention has been made in view of the above problems, and transmits specific wavelength light that has an effect of suppressing the extension of the axial length, has low transmittance of ultraviolet light other than the specific wavelength light, and is shielded.
  • An object of the present invention is to provide a wavelength selective transmission glass article having excellent thermal properties.
  • the present invention provides a light transmittance T of 315 nm to 400 nm or less represented by the following formula : 1% or more of a wavelength of 315 nm or more and 400 nm or less; Provided is a wavelength selective transmission glass article having a T 315 nm or less of 60% or less, a solar transmittance determined by JIS-R3106 (1998) of 65% or less, and a solar heat acquisition rate of 0.70 or less.
  • a k is a weighting coefficient at a wavelength k (nm) for calculating T (light transmittance) defined by ISO-9050: 2003, and T k is a wavelength k (nm). The transmittance at.
  • the wavelength selective transmission glass article of the present invention preferably has a light transmittance T 360-400 nm of a wavelength of 360 to 400 nm represented by the following formula of 3% or more. (A k and T k in the above formula are the same as above.)
  • the wavelength selective transmission glass article of the present invention preferably has a light transmittance T 400-760 nm of a wavelength of 400 to 760 nm represented by the following formula of 1% or more.
  • a ′ k is a weighting coefficient at the wavelength k (nm) for calculating the light transmittance (D65 light source) Tv_D65 defined by ISO-9050: 2003, and T k is the same as above. .
  • the wavelength-selective transmissive glass article of the present invention preferably has a light transmittance of 30% or more at a wavelength of 380 nm, a light transmittance of a wavelength of 350 nm of 30% or less, and a light transmittance of a wavelength of 315 nm of 10% or less.
  • a first embodiment of the wavelength selective transmission glass article of the present invention is a single plate glass, and the single plate glass has a light transmittance T of 315 nm to 400 nm or less and a wavelength of 315 nm or more and a wavelength of 315 nm or less. It is a wavelength selective transmission single plate glass having a transmittance T of 315 nm or less of 60% or less, a solar transmittance determined by JIS-R3106 (1998) of 65% or less, and a solar heat gain of 0.70 or less.
  • the wavelength selective transmission single plate glass preferably has a light transmittance T 360-400 nm of 3% or more.
  • the wavelength selective transmission single plate glass preferably has a light transmittance T 400-760 nm of 1% or more.
  • the wavelength selective transmission single plate glass is a glass plate, and a Low-E film provided on either main surface of the glass plate Consists of The glass plate has a total iron content expressed as Fe 2 O 3 of 0.001 to 10% by mass and a Fe-Redox value of 5 to 80%.
  • the glass plate includes Au, Ag, Sn, rare earth elements (excluding La and Y), Ti, W, Mn, As, Sb, and It is preferable to contain at least one element selected from the group consisting of U in a total amount of 0.1 to 5% by mass in terms of oxide.
  • the glass plate has an oxide conversion total amount of at least one element selected from the group consisting of Ce, Sn, and Ti. It is preferable to contain 1 mass ppm or more and 5 mass% or less.
  • the glass plate is made of Au, Ag, Sn, rare earth elements (excluding La and Y), W, Mn, As, Sb, and U. It is preferable to contain at least one element selected from the group consisting of 0.1 mass ppm or more and 5 mass% or less in terms of the total amount in terms of oxide.
  • the glass plate is expressed by mass% based on oxide, and has a glass matrix composition of SiO 2 : 60 to 80%, Al 2 O 3. : 0-7%, MgO: 0-10%, CaO: 4-20%, Na 2 O: 7-20%, K 2 O: 0-10% are preferable.
  • the glass plate is expressed by mass% based on oxide, and has a glass matrix composition of SiO 2 : 45 to 80%, Al 2 O 3. 7 percent less than 30%, B 2 O 3: 0 ⁇ 15%, MgO: 0 ⁇ 15%, CaO: 0 ⁇ 6%, Na 2 O: 7 ⁇ 20%, K 2 O: 0 ⁇ 10%, ZrO 2 : It is preferable to contain 0 to 10%.
  • the glass plate is expressed by mass% on the basis of oxide and has a glass matrix composition of SiO 2 : 45 to 70%, Al 2 O 3. : 10-30%, B 2 O 3 : 0-15%, at least one selected from the group consisting of MgO, CaO, SrO and BaO: 5-30%, from Li 2 O, Na 2 O and K 2 O It is preferable to contain at least one selected from the group consisting of 0% to 7%.
  • the second aspect of the wavelength selective transmission glass article of the present invention of the first aspect is the wavelength selective transmission film in which the wavelength selective transmission single plate glass is provided on either the main surface of the glass plate or the glass plate. , And a Low-E film provided on one main surface of the glass plate.
  • the single plate glass has a light transmittance of 380 nm and a light transmittance of 350 nm.
  • the transmittance of light with a wavelength of 315 nm or less is 30% or less and 10% or less.
  • the wavelength selective transmission film and the Low-E film are preferably provided on different main surfaces of the glass plate. .
  • At least one of the glass plate and the wavelength selective transmission film contains a component that emits light having a wavelength of 380 nm.
  • the glass plate preferably has a light transmittance of a wavelength of 360 nm of 50% or more.
  • the wavelength selective transmission film preferably contains a component that absorbs light having a wavelength of less than 360 nm.
  • the wavelength selective transmission film preferably contains a component that reflects light having a wavelength of less than 360 nm.
  • a second embodiment of the wavelength selective transmission glass article of the present invention is a laminated glass in which a pair of glass plates are bonded via an adhesive layer, and the laminated glass has a light transmittance T 315 nm of a wavelength greater than 315 nm and not greater than 400 nm.
  • Ultra-400 nm or less is 3% or more
  • light transmittance T of 315 nm or less is T 315 nm or less is 60% or less
  • solar transmittance determined by JIS-R3106 (1998) is 65% or less
  • solar heat acquisition rate is 0 .70 or less wavelength selective transmission laminated glass.
  • the wavelength selective transmission laminated glass preferably has a light transmittance T 360-400 nm of 3% or more.
  • the wavelength selective transmission laminated glass preferably has a light transmittance T 400-760 nm of 1% or more.
  • the 1st aspect of the wavelength selective transmission glass article of the present invention of the 2nd form is in any one main surface of any one glass plate among the pair of glass plates which constitutes the wavelength selective transmission laminated glass.
  • a Low-E film is provided.
  • the adhesive layer constituting the wavelength selective transmission laminated glass has a light transmittance T of more than 315 nm and not more than 400 nm of 3% or more,
  • the light transmittance T 315 nm or less is 60% or less, and the adhesive layer has a heat ray absorbing ability.
  • the adhesive layer contains a heat ray absorbing material.
  • At least one of the pair of glass plates constituting the wavelength selective transmission laminated glass has a light transmittance of more than 315 nm and not more than 400 nm.
  • T 315nm ultra 400nm or less in thickness 6mm terms least 3%, and the wavelength 315nm or less following the light transmittance T 315nm is a wavelength selective permeable glass 1 of 60% or less in thickness 6mm terms.
  • the Low-E film when a Low-E film is formed on the main surface of one of the pair of glass plates, the Low- It is preferable that E film
  • the wavelength selective transmission glass 1 preferably has a light transmittance T 360-400 nm of 3% or more in terms of a plate thickness of 6 mm.
  • the wavelength selective transmission glass 1 preferably has a light transmittance T 400-760 nm of 1% or more in terms of a plate thickness of 6 mm.
  • the wavelength-selective transmissive glass 1 has a total iron content represented by Fe 2 O 3 of 0.001 to 10% by mass, Fe—
  • the Redox value is preferably 5 to 80%.
  • the wavelength selective transmission glass 1 includes Au, Ag, Sn, rare earth elements (excluding La and Y), Ti, W, Mn, It is preferable to contain at least one element selected from the group consisting of As, Sb and U in a total amount of 0.1 to 5% by mass in terms of oxide.
  • the wavelength selective transmission glass 1 includes at least one element selected from the group consisting of Ce, Sn, and Ti in combination of oxides. It is preferable to contain 0.1 mass ppm or more and 5 mass% or less by quantity.
  • the wavelength selective transmission glass 1 includes Au, Ag, Sn, rare earth elements (excluding La and Y), W, Mn, As, It is preferable to contain at least one element selected from the group consisting of Sb and U in a total amount of 0.1 to 5% by mass in terms of oxide.
  • the wavelength selective transmission glass 1 is expressed by mass% on an oxide basis, and the glass matrix composition is SiO 2 : 60-80%, Al 2 O 3 : 0-7%, MgO: 0-10%, CaO: 4-20%, Na 2 O: 7-20%, K 2 O: 0-10% are preferable.
  • the wavelength selective transmission glass 1 is expressed by mass% on an oxide basis, and the glass matrix composition is SiO 2 : 45-80%, Al 2 O 3 : more than 7% and 30% or less, B 2 O 3 : 0 to 15%, MgO: 0 to 15%, CaO: 0 to 6%, Na 2 O: 7 to 20%, K 2 O: 0 It is preferable to contain ⁇ 10% and ZrO 2 : 0 ⁇ 10%.
  • the wavelength selective transmission glass 1 is expressed by mass% on an oxide basis, and has a glass matrix composition of SiO 2 : 45 to 70%, Al 2 O 3 : 10-30%, B 2 O 3 : 0-15%, at least one selected from the group consisting of MgO, CaO, SrO and BaO: 5-30%, Li 2 O, Na 2 O and It is preferable to contain at least one selected from the group consisting of K 2 O: 0% or more and 7% or less.
  • wavelength selective transmission glass article of this invention of 2nd form is at least one of the pair of glass plates which comprise the said wavelength selective transmission laminated glass, a glass plate and the main surface of this glass plate
  • the wavelength-selective transmissive glass 2 having a light transmittance T of more than 315 nm and not more than 400 nm is 3% or more and the light transmittance T 315 nm or less is 60% or less.
  • the Low-E film when a Low-E film is formed on the main surface of one of the pair of glass plates, the Low- It is preferable that E film
  • the wavelength selective transmission glass 2 has a light transmittance of a wavelength of 380 nm of 80% or more and a light transmittance of a wavelength of 350 nm of 30%.
  • the transmittance of light having a wavelength of 315 nm is preferably 10% or less.
  • the wavelength selective transmission glass 2 contains a component that emits light having a wavelength of 380 nm in at least one of the glass plate and the film. Is preferred.
  • the glass plate of the wavelength selective transmission glass 2 preferably has a light transmittance of 50% or more at a wavelength of 360 nm.
  • the film of the wavelength selective transmission glass 2 contains a component that absorbs light having a wavelength of less than 360 nm.
  • the film of the wavelength selective transmission glass 2 preferably contains a component that reflects light having a wavelength of less than 360 nm.
  • the adhesive layer constituting the wavelength-selective transparent laminated glass has a light transmittance T of more than 315 nm and not more than 400 nm of 3% or more, and The light transmittance T of 315 nm or less is 60% or less.
  • the wavelength-selective transparent laminated glass has a light transmittance of a wavelength of 380 nm of 80% or more and a light transmittance of a wavelength of 350 nm of 30%.
  • the transmittance of light having a wavelength of 315 nm is preferably 10% or less.
  • the adhesive layer constituting the wavelength-selective transmissive laminated glass preferably contains a component that emits light having a wavelength of 380 nm.
  • the adhesive layer constituting the wavelength selective transmission laminated glass has a light transmittance of 50% or more at a wavelength of 360 nm. .
  • the adhesive layer constituting the wavelength selective transmission laminated glass contains a component that absorbs light having a wavelength of less than 360 nm.
  • the adhesive layer constituting the wavelength-selective transmissive laminated glass preferably contains a component that reflects light having a wavelength of less than 360 nm.
  • the wavelength selective transmission glass article of the second aspect of the present invention at least part of light transmitted from one surface to the other surface is interposed between the pair of glass plates constituting the wavelength selective transmission laminated glass.
  • a light redirecting sheet that redirects and transmits the light, and one of the pair of glass plates and the light redirecting sheet are joined together by a first adhesive layer; Of the glass plates, the other glass plate and the light redirecting sheet may be joined by a second adhesive layer.
  • a third embodiment of the wavelength selective transmission glass article of the present invention is a multi-layer glass having a plurality of glass plates arranged at intervals, and the multi-layer glass transmits light having a wavelength greater than 315 nm and not greater than 400 nm.
  • the transmittance T of over 315 nm and 400 nm or less is 3% or more in terms of the plate thickness 6 mm
  • the light transmittance T 315 nm or less of the wavelength 315 nm or less is 60% or less in terms of the plate thickness 6 mm
  • the solar transmittance determined by JIS-R3106 (1998) Is a wavelength-selective transmissive multilayer glass having a solar heat gain of 0.70 or less.
  • the wavelength selective transmission multilayer glass preferably has a light transmittance T 360-400 nm of 3% or more.
  • the wavelength selective transmission multilayer glass preferably has a light transmittance T 400-760 nm of 1% or more.
  • At least one of the glass plates constituting the wavelength selective transmission multilayer glass has a light transmittance T of more than 315 nm and less than 400 nm.
  • the wavelength selective transmission glass 3 having a wavelength of 315 nm or more and 400 nm or less in terms of a plate thickness of 6 mm and a light transmittance T of 315 nm or less and a wavelength of 315 nm or less is 60% or less in terms of a plate thickness of 6 mm.
  • a Low-E film is provided on one main surface of any one of the glass plates constituting the layer glass.
  • the Low-E film is the wavelength selective transmission glass 3 of the glass plates constituting the wavelength selective transmission multilayer glass. It is preferable to be provided on the main surface of the glass plate other than the above.
  • the wavelength selective transmission glass 3 preferably has a light transmittance T 360-400 nm of 3% or more in terms of a plate thickness of 6 mm.
  • the wavelength selective transmission glass 3 preferably has a light transmittance T 400-760 nm of 1% or more in terms of a plate thickness of 6 mm.
  • the wavelength selective transmission glass 3 has a total iron content represented by Fe 2 O 3 of 0.001 to 10% by mass, Fe—
  • the Redox value is preferably 5 to 80%.
  • the wavelength selective transmission glass 3 includes Au, Ag, Sn, rare earth elements (excluding La and Y), Ti, W, Mn, It is preferable to contain at least one element selected from the group consisting of As, Sb and U in a total amount of 0.1 to 5% by mass in terms of oxide.
  • the wavelength selective transmission glass 3 includes at least one element selected from the group consisting of Ce, Sn, and Ti as a compound in terms of oxide. It is preferable to contain 0.1 mass ppm or more and 5 mass% or less by quantity.
  • the wavelength selective transmission glass 3 includes Au, Ag, Sn, rare earth elements (excluding La and Y), W, Mn, As, It is preferable to contain at least one element selected from the group consisting of Sb and U in a total amount of 0.1 to 5% by mass in terms of oxide.
  • the wavelength selective transmission glass 3 is expressed in terms of mass% based on oxide, and has a glass matrix composition of SiO 2 : 60 to 80%, Al 2 O 3 : 0-7%, MgO: 0-10%, CaO: 4-20%, Na 2 O: 7-20%, K 2 O: 0-10% are preferable.
  • the wavelength selective transmission glass 3 is expressed by mass% based on oxide, and has a glass matrix composition of SiO 2 : 45-80%, Al 2 O 3 : more than 7% and 30% or less, B 2 O 3 : 0 to 15%, MgO: 0 to 15%, CaO: 0 to 6%, Na 2 O: 7 to 20%, K 2 O: 0 It is preferable to contain ⁇ 10% and ZrO 2 : 0 ⁇ 10%.
  • the wavelength selective transmission glass 3 is expressed in terms of mass% on the basis of oxide, and has a glass matrix composition of SiO 2 : 45 to 70%, Al 2 O 3 : 10-30%, B 2 O 3 : 0-15%, at least one selected from the group consisting of MgO, CaO, SrO and BaO: 5-30%, Li 2 O, Na 2 O and It is preferable to contain at least one selected from the group consisting of K 2 O: 0% or more and 7% or less.
  • At least one of the glass plates constituting the wavelength selective transmission multilayer glass is provided on the main surface of the glass plate and the glass plate.
  • a wavelength-selective transmissive glass 4 having a light transmittance T 315 nm of 400 nm or less of 3% or more and a light transmittance T 315 nm or less of 60% or less.
  • a Low-E film is provided on one main surface of any one glass plate constituting the glass.
  • the Low-E film is the wavelength selective transmission among any one glass plate constituting the wavelength selective transmission multilayer glass. It is preferable that it is provided on the main surface of the glass plate other than the porous glass 4.
  • the wavelength selective transmission glass 4 has a light transmittance of a wavelength of 380 nm of 80% or more and a light transmittance of a wavelength of 350 nm of 30%.
  • the transmittance of light having a wavelength of 315 nm is preferably 10% or less.
  • the wavelength selective transmission glass 4 contains a component that emits light having a wavelength of 380 nm in at least one of the glass plate and the film. Is preferred.
  • the glass plate of the wavelength selective transmission glass 4 preferably has a light transmittance of 50% or more at a wavelength of 360 nm.
  • the film of the wavelength selective transmission glass 4 preferably contains a component that absorbs light having a wavelength of less than 360 nm.
  • the film of the wavelength selective transmission glass 4 preferably contains a component that reflects light having a wavelength of less than 360 nm.
  • the present invention provides a building in which any one of the above-mentioned wavelength selective transmission glass articles is installed as a window member in an opening formed in a wall.
  • a wavelength-selective transmissive glass article that transmits light of a specific wavelength but hardly transmits ultraviolet light having a shorter wavelength and has excellent heat shielding properties can be obtained.
  • FIG. 1 is a cross-sectional view of a configuration example of a wavelength selective transmission glass article according to the first aspect of the first embodiment.
  • FIG. 2 is a cross-sectional view of a configuration example of the wavelength selective transmission glass article according to the second aspect of the first embodiment.
  • FIG. 3 is a cross-sectional view of one configuration example of the wavelength selective transmission glass article of the second embodiment.
  • FIG. 4 is a cross-sectional view of one configuration example of the wavelength selective transmission glass article of the third embodiment.
  • FIG. 5 is a transmission spectrum of an oxalic anilide ultraviolet absorber and a hydroxyphenyltriazine ultraviolet absorber and a benzotriazole ultraviolet absorber widely used as an ultraviolet absorber.
  • FIG. 5 is a transmission spectrum of an oxalic anilide ultraviolet absorber and a hydroxyphenyltriazine ultraviolet absorber and a benzotriazole ultraviolet absorber widely used as an ultraviolet absorber.
  • FIG. 6 is a transmission spectrum of a PVB layer (thickness 0.76 mm) to which 0.2% by mass of a hydroxyphenyltriazine-based UV absorber or 5% by mass of a benzotriazole-based UV absorber is added.
  • FIG. 7 is a diagram illustrating transmission spectrum examples of wavelength selective transmission glasses of Example 1A, Comparative Example 1B, Comparative Example 1C, and Comparative Example 1D.
  • FIG. 8 is a view showing a transmission spectrum of the wavelength selective transmission glass article of Example 2-1.
  • FIG. 9 is a view showing a transmission spectrum of the wavelength selective transmission glass article of Example 2-2.
  • FIG. 10 is a diagram showing the transmission spectra of the wavelength selective transmission glass article and glass plate of Example 2-3.
  • FIG. 11 is a diagram showing the transmission spectra of the wavelength selective transmission glass article and the glass plate of Example 2-4.
  • FIG. 12 is a diagram showing a transmission spectrum example of the wavelength selective transmission glass article and glass plate of Example 2-5.
  • FIG. 13 is a diagram showing a transmission spectrum example of the wavelength selective transmission laminated glass of Examples 3-1, 3-2, 3-3, 3-4.
  • FIG. 14 is a graph showing the light distribution characteristics of the wavelength selective transmission laminated glass of Example 3-1.
  • FIG. 15 is a diagram showing the light distribution characteristics of the wavelength selective transmission laminated glass of Example 3-2.
  • FIG. 16 is a diagram showing the light distribution characteristics of the wavelength selective transmission laminated glass of Example 3-3.
  • FIG. 17 is a graph showing the light distribution characteristics of the wavelength selective transmission laminated glass of Example 3-4.
  • FIG. 18 is a diagram showing an example of a transmission spectrum of the wavelength selective transmission multilayer glass of Examples 4-1, 4-2 and 4-3.
  • light transmittance at a wavelength of 380 nm and the like are transmittances at that wavelength
  • light transmittance T 315 nm to 400 nm and below “light transmittance T 400 to 760 nm ” and the like are ISO-9050: It is assumed that the transmittance includes a weighting coefficient for each wavelength specified in 2003.
  • the “specific short wavelength light absorbing component” refers to a component that absorbs light having a wavelength of less than 360 nm
  • the “specific short wavelength light reflecting component” refers to a component that reflects light having a wavelength of less than 360 nm.
  • the solar radiation transmittance refers to the solar radiation transmittance determined by JIS-R3106 (1998).
  • Solar heat acquisition rate ( ⁇ value) is the total solar heat incident from the first surface (outside of the glass) of the glass article, the heat directly transmitted to the second surface (inside of the room), and the glass It is expressed as a ratio of the sum of heat absorbed by the article and then released from the second surface. That is, it is determined by (radiant flux of solar radiation transmitted through the glass article + heat flux absorbed by the glass article and transmitted to the indoor side) / radiant flux of incident solar radiation.
  • the light transmittance T of 315 nm to 400 nm or less represented by the following formula is 1% or more.
  • a k is a weighting coefficient at the wavelength k (nm) for calculating T (light transmittance) defined by ISO-9050: 2003, and T k is at the wavelength k (nm). Transmittance.
  • the above formula uses only the weighting coefficient in the wavelength range of more than 315 nm and not more than 400 nm among the weighting coefficients for calculating T (light transmittance) defined in ISO-9050: 2003, and in this wavelength range, ,
  • a k is the wavelength k at 2003 is defined for each 5 nm
  • a k during k 315 nm than in the above formula of Sigma
  • the wavelength selective transmission glass article of the present invention is expected to have an effect of suppressing the progress of myopia when the light transmittance T 315 nm and 400 nm or less is 1% or more.
  • the light transmittance T 315 nm to 400 nm is preferably 3% or more, more preferably 5% or more, and more preferably 10% or more. % Or more, more preferably 30% or more, and particularly preferably 40% or more.
  • the wavelength selective transmission glass article of the present invention may have a light transmittance T of more than 315 nm and not more than 400 nm of 100%.
  • the light transmittance T 315 nm or less having a wavelength of 315 nm or less represented by the following formula is 60% or less.
  • a k and T k are the same as described above. Therefore, the above formula uses only the weighting coefficient in the wavelength range of 300 to 315 nm among the weighting coefficients for calculating T (light transmittance) defined by ISO-9050: 2003, and in the wavelength range, It is a value obtained by dividing the sum of the products of the weighting coefficient (A k ) and the transmittance (T k ) by the sum of the weighting coefficients in the wavelength range, and is an average value of the weighted transmittance.
  • the value of the weighting coefficient (A k ) defined by ISO-9050: 2003 is set to 0 when the wavelength is less than 300 nm. .
  • the light transmittance T 315 nm or less is 60% or less, whereby various damages to the eye due to light in the wavelength range can be suppressed.
  • the light transmittance T 315 nm or less is preferably 45% or less, more preferably 30% or less, further preferably 15% or less, and more preferably 5% or less. Particularly preferred is 1% or less, and most preferred is 0.8% or less.
  • the wavelength selective transmission glass article of the present invention may have a light transmittance T 315 nm or less of 0%.
  • the wavelength selective transmission glass article of the present invention has a solar transmittance of 65% or less, and a solar heat acquisition rate of 0.70 or less.
  • the heat shielding property is excellent.
  • the wavelength selective transmission glass article of the present invention preferably has a light transmittance T 360-400 nm of a wavelength of 360 to 400 nm represented by the following formula of 3% or more.
  • T light transmittance
  • a k and T k are the same as above. Therefore, the above formula uses only the weighting coefficient in the wavelength range of 360 to 400 nm among the weighting coefficients for calculating T (light transmittance) defined in ISO-9050: 2003, and in this wavelength range, This is a value obtained by dividing the sum of the products of the weighting coefficient (A k ) and the transmittance (T k ) by the sum of the weighting coefficients in this wavelength range, and is an average value of the weighted transmittance.
  • the effect of suppressing the progression of myopia can be particularly expected if the light transmittance T 360-400 nm is 3% or more.
  • the wavelength selective transmission glass article of the present invention preferably has a light transmittance T 360-400 nm of 5% or more, more preferably 10% or more, more preferably 20% or more, and 30%. More preferably, it is 40% or more, more preferably 60% or more, and particularly preferably 80% or more.
  • the wavelength selective transmission glass article of the present invention may have a light transmittance T 360-400 nm of 100%.
  • the wavelength selective transmission glass article of the present invention is not particularly limited in light transmittance outside the above-described specific wavelength range, and may be appropriately selected according to the application.
  • the wavelength selective transmission glass article of the present invention preferably has a light transmittance T 400-760 nm of a wavelength of 400 to 760 nm represented by the following formula of 1% or more.
  • T k is the same as above.
  • a ′ k is a weighting coefficient at the wavelength k (nm) for calculating the light transmittance T 400-760 nm (D65 light source) Tv_D65 defined by ISO-9050: 2003.
  • the above formula uses only the weighting coefficient in the wavelength range of 400 to 760 nm among the weighting coefficients for calculating the light transmittance T 400-760 nm (D65 light source) Tv_D65 defined by ISO-9050: 2003. , The product of weighting coefficient (A k ) and transmittance (T k ) in the wavelength range divided by the sum of the weighting coefficient in the wavelength range, and the average value of the weighted transmittance It is.
  • the wavelength selective transmission glass article of the present invention has a light transmittance T 400-760 nm of 1% or more, it is easy to obtain the visibility of the back surface of the glass. It becomes easy to recognize the unique luster and texture, and the design can be improved.
  • the more preferable range of the light transmittance T 400-760 nm varies depending on the use of the wavelength selective transmission glass article of the present invention. However, in the case where the light transmission of 400 to 760 nm is required, the light transmittance T 400- 760 nm is more preferably 10% or more, more preferably 20% or more, more preferably 40% or more, more preferably 60% or more, and 80% or more. More preferably, it is particularly preferably 90% or more.
  • the wavelength selective transmission glass article of the present invention may have a light transmittance T 400-760 nm of 100%.
  • the wavelength selective transmission glass article of the present invention preferably has a light transmittance of 40% or more at a wavelength of 380 nm. Such a wavelength selective transmission glass article sufficiently transmits light having a high myopia progression suppressing effect.
  • the transmittance of light having a wavelength of 380 nm is more preferably 50% or more.
  • the transmittance of light having a wavelength of 380 nm may be 100%.
  • the wavelength selective transmission glass article of the present invention has a light transmittance of 350 nm, preferably 30% or less, more preferably 20% or less, and particularly preferably 10% or less.
  • the transmittance of light having a wavelength of 350 nm may be 0%. Since such a wavelength selective transmission glass article can reduce the intensity of light having a wavelength of 350 nm or less, when the wavelength selective transmission glass article of the present invention is used for a window glass of a building or an automobile, sunburn is caused by light in the wavelength range. Etc. can be suppressed.
  • the wavelength selective transmission glass article of the present invention preferably has a light transmittance of a wavelength of 315 nm of 10% or less, more preferably 5% or less, and particularly preferably 1% or less.
  • the transmittance of light having a wavelength of 315 nm may be 0%. Since this glass article hardly transmits light of 315 nm or less, when this glass article is used for a window glass of a building or an automobile, intense sunburn or the like due to light in the wavelength range can be prevented.
  • the first form of the wavelength selective transmission glass article of the present invention is a single plate glass.
  • the single plate glass in the present invention refers to one in which a predetermined functional film is formed on at least one main surface of a glass plate.
  • the single plate glass of the first form of the wavelength selective transmission glass article of the present invention (hereinafter referred to as the single plate glass of the present invention in the present specification) is a wavelength selective transmission single plate glass that satisfies the conditions described later.
  • the single plate glass of the present invention has a light transmittance T of more than 315 nm and not more than 400 nm of 3% or more, more preferably 5% or more, more preferably 10% or more, and further preferably 20% or more. Preferably, it is 30% or more, more preferably 40% or more.
  • the single plate glass of the present invention may have a light transmittance T of more than 315 nm and not more than 400 nm of 100%.
  • the light transmittance T 315 nm or less is 60% or less, preferably 45% or less, more preferably 30% or less, and further preferably 15% or less. % Or less is particularly preferable, 1% or less is more preferable, and 0.8% or less is most preferable.
  • the single plate glass of the present invention may have a light transmittance T 315 nm or less of 0%.
  • the single plate glass of the present invention has a solar transmittance of 65% or less.
  • the solar transmittance is more preferably 60% or less, and still more preferably 50% or less.
  • the single plate glass of the present invention has a solar heat gain rate of 0.70 or less.
  • the single plate glass of the present invention preferably has a light transmittance T 360-400 nm of 3% or more, more preferably 5% or more, more preferably 10% or more, and more preferably 20% or more. Is more preferably 30% or more, more preferably 40% or more, more preferably 60% or more, and particularly preferably 80% or more.
  • the single glass plate of the present invention may have a light transmittance T 360-400 nm of 100%.
  • the single plate glass of the present invention preferably has a light transmittance T 400-760 nm of 1% or more, more preferably 10% or more, more preferably 20% or more, and 40% or more. Is more preferably 60% or more, more preferably 80% or more, and particularly preferably 90% or more.
  • the single glass plate of the present invention may have a light transmittance T 400-760 nm of 100%.
  • the single plate glass of the present invention preferably has a solar heat gain of 0.70 or less, more preferably 0.60 or less, and particularly preferably 0.50 or less.
  • FIG. 1 is a diagram showing a configuration example of a first aspect of a single glass sheet according to the present invention.
  • a single glass plate 10 shown in FIG. 1 includes a glass plate 11 and a Low-E film 12 provided on one main surface of the glass plate 11.
  • the configuration of the heat ray shielding film (also referred to as a heat ray reflective film, a heat ray absorbing film, or a low radiation film (Low-E film)) in the present invention is not particularly limited as long as it has a function of reflecting (shielding) heat rays.
  • the content of metal elements other than Ag is preferably 10% by mass or less, more preferably 5% by mass or less, and further preferably 3% by mass or less in the entire silver alloy.
  • the Ag-containing layer is arranged between the dielectric layers, that is, a laminated structure such as the first dielectric layer, the Ag-containing layer, and the second dielectric layer.
  • Examples of the constituent material of the dielectric layer include various metal oxides and metal nitrides.
  • the metal oxide examples include those containing as a main component an oxide of at least one metal element selected from Zn, Ti, Sn, Si, Al, Ta and Zr.
  • Other examples include zinc oxide containing Al (Aluminum-doped Zinc Oxide: AZO) and zinc oxide containing Sn (Tin-doped Zinc Oxide: TZO).
  • the zinc oxide containing Al is preferably such that the ratio of Al to the total amount of Zn and Al is 1 to 10 atomic%, more preferably 3 to 7 atomic%.
  • the zinc oxide containing Sn preferably has a ratio of Sn to the total amount of Zn and Sn of 10 to 90% by mass, more preferably 20 to 80% by mass.
  • examples of the metal nitride include those containing as a main component a nitride of at least one metal selected from Si and Al.
  • the first dielectric layer and the second dielectric layer may be composed of different materials. good.
  • the Low-E film may have a structure in which a plurality of Ag-containing layers are stacked so as to include a plurality of Ag-containing layers. In this case, the dielectric layer can be similarly laminated in a plurality of layers.
  • a barrier layer can be disposed between the Ag-containing layer and the dielectric layer.
  • the barrier layer is provided in order to suppress oxidation or the like of the Ag-containing layer. That is, when another layer such as a second dielectric layer is formed on the Ag-containing layer, the Ag-containing layer may be oxidized, but by providing a barrier layer, the oxidation of the Ag-containing layer is suppressed. Thus, it becomes easy to obtain desired optical characteristics.
  • the barrier layer is at least one selected from, for example, Ti, Zn, Cr, Ni, Cr, Al, Zn, W, Pd, Au, Pt, Si, Sn, Nb, Ta, Hf, and Zr.
  • a metal-based material or the like can be arranged. Further, it is possible to arrange the TiO 2, ZnO, SnO 2, In 2 O 3, Nb 2 O 5 as a main component at least one metal oxide selected from the like.
  • the thickness of the Low-E film is not particularly limited, and can be selected depending on the required heat shielding performance (heat ray reflection performance), film configuration, etc., but is 0.05 ⁇ m or more and 0.4 ⁇ m or less. It is preferable that it is 0.1 ⁇ m or more and 0.3 ⁇ m or less. Moreover, in this invention, it becomes possible to make thicker the thickness of Ag layer with large visible light absorption (when there are two or more Ag layers), it is thicker than the prior art.
  • each dielectric layer is preferably 15 to 85 nm.
  • the thickness of each Ag-containing layer is preferably 10 to 17 nm.
  • the thickness of each barrier layer is preferably 2 to 10 nm.
  • the barrier layer and the third dielectric layer in this order.
  • the dielectric layer zinc oxide containing Al (AZO) is used for the dielectric layer, two layers of Ag are provided, and titanium oxide is used for the barrier layer (glass plate / first AZO layer / first Ag layer / first
  • the barrier layer glass plate / first AZO layer / first Ag layer / first
  • the desired heat shielding performance heat reflection performance
  • the Low-E film can realize not only heat shielding properties but also wavelength selective transmittance in the ultraviolet region at the same time, which is most preferable. Further, this Low-E film is preferable in terms of appearance since the color tone of reflected light and transmitted light of visible light is close to that of the existing Low-E film.
  • the thickness of each layer is preferably in the following range.
  • a film having a metal oxide film having low radiation performance is preferable, and a tin oxide layer or a film made of tin oxide containing a metal element such as F or Sb is used. There may be.
  • the Low-E film may be provided on any main surface of the glass plate. However, when the single plate glass of the present invention is used, the Low-E film is provided on the main surface on the indoor side to prevent deterioration of the film surface. Is preferable from the viewpoint of not impairing the heat shielding property.
  • the light transmittance T 315 nm to 400 nm or less and the light transmittance T 315 nm or less include the iron content of the glass plate and divalent iron (Fe in the iron contained in the glass plate). 2+ ) and trivalent iron (Fe 3+ ) are affected. That is, the iron content of the glass plate affects the light transmittance T 315 nm to 400 nm or less and the light transmittance T 315 nm or less . On the other hand, the ratio of divalent iron (Fe 2+ ) to trivalent iron (Fe 3+ ) in the iron contained in the glass plate affects the light transmittance T 315 nm or less .
  • Fe-Redox is used as an index of the ratio of divalent iron (Fe 2+ ) to trivalent iron (Fe 3+ ) in iron contained in the glass plate.
  • the Fe-Redox a ratio of Fe 2+ content in terms of Fe 2 O 3 to the total iron content in terms of Fe 2 O 3.
  • the glass plate according to the first aspect of the single plate glass of the present invention has a total iron content expressed as Fe 2 O 3 of 0.001 to 10% by mass and a value of Fe-Redox of 5 to 80%. preferable.
  • the total iron content represented by Fe 2 O 3 is 0.001% by mass or more, the solubility and defoaming property of glass in a large kiln are improved. It is more preferably 0.01% by mass or more, further preferably 0.03% by mass or more, further preferably 0.04% by mass or more, and most preferably 0.05% by mass or more. preferable.
  • the total iron content represented by Fe 2 O 3 is 10% by mass or less, there is an effect of facilitating light in the near ultraviolet wavelength region.
  • the visibility of the back surface of the glass is easily obtained, it becomes easier to recognize gloss and texture peculiar to glass as compared with resins, metals, and wall materials, and the design can be improved. More preferably, it is 7 mass% or less, More preferably, it is 5 mass% or less, Most preferably, it is 2 mass% or less. Furthermore, it is preferably 0.5% by mass or less, more preferably 0.3% by mass or less, and still more preferably 0.15% by mass or less in terms of mass% based on oxide. When Fe-Redox is 5% or more, the defoaming property in the large kiln is improved, and the heat shielding property of the glass is improved.
  • Fe-Redox is 80% or less, which facilitates the passage of light with a wavelength of more than 315 nm and less than 400 nm, improves the solubility of glass raw materials during production in large kilns, and reduces the fuel used during melting. Can do. More preferably, it is 75% or less, more preferably 70% or less, more preferably 65% or less, and most preferably 60% or less.
  • the glass plate in the first aspect of the single plate glass of the present invention preferably contains a trace component having an action of absorbing light having a wavelength of 315 nm or less.
  • the trace component having an action of absorbing light having a wavelength of 315 nm or less include Au, Ag, Sn, rare earth elements (excluding La and Y), Ti, W, Mn, As, Sb, and U.
  • the wavelength selective transmission glass of the present invention oxidizes at least one element selected from the group consisting of Au, Ag, Sn, rare earth elements (excluding La and Y), Ti, W, Mn, As, Sb, and U. It is preferable to contain 0.1 mass ppm or more and 5 mass% or less by the total amount of product conversion.
  • the above components are contained in a total amount of 1 mass ppm or more, and more preferably 5 mass ppm or more.
  • the stability of the glass represented by water resistance and chemical resistance is not deteriorated, and the raw material cost in a large kiln increases. This makes it difficult to control and stabilize the color of the glass during production.
  • the above components are contained in a total amount of 2% by mass or less, and more preferably 1% by mass or less.
  • the glass plate according to the first aspect of the single glass sheet of the present invention preferably contains at least one element selected from the group consisting of Ce, Sn, and Ti in a total amount of 0.1 mass ppm or more in terms of oxide, The content is more preferably 1 ppm by mass or more, and further preferably 5 ppm by mass or more.
  • the above components are preferably contained in a total amount of 5% by mass or less, more preferably 2% by mass or less, and further preferably 1% by mass or less. preferable.
  • CeO 2 is 0.1 to 0.8%, TiO 2 is 0 to 0.6%, and SnO 2 is 0 to 0.6% in terms of mass% based on oxide.
  • CeO 2 is 0.2 to 0.6%, TiO 2 is 0 to 0.4%, SnO 2 is more preferably 0 to 0.4%, and CeO 2 is 0.35 to More preferably, it is 0.45%, TiO 2 is 0 to 0.2%, and SnO 2 is 0 to 0.2%.
  • CeO 2 / (CeO 2 + TiO 2 + Fe 2 O 3 ) (CeO 2 , TiO 2 , and Fe 2 O 3 in the formulas represent values of mass% of the respective oxides) is 0. .2 or more, preferably 0.3 or more, more preferably 0.4 or more, and even more preferably 0.5 or more, while maintaining a light transmittance T 360-400 nm that has a high effect of suppressing myopia progression, It is preferable because it has an effect of absorbing light having a wavelength of 315 nm or less and maintaining light transmittance T 400-760 nm. Further, 0.95 or less, preferably 0.90 or less, and more preferably 0.85 or less is preferable because coloring can be suppressed.
  • the total iron content represented by Fe 2 O 3 in terms of mass% on the oxide basis is 0.04 to 0.15%, CeO 2 is 0.35 to 0.45%, TiO 2 is 0 to 0.2%, SnO 2 is 0 to 0.2%, CeO 2 + 3 ⁇ TiO 2 + 6 ⁇ SnO 2 is 0.41 to 1.2%, and Fe-Redox is Most preferred is 25-65%.
  • the wavelength selective transmission glass is at least selected from the group consisting of Au, Ag, Sn, rare earth elements (excluding La and Y), W, Mn, As, Sb, and U.
  • One element is preferably contained in an amount of 0.1 mass ppm or more, more preferably 1 mass ppm or more, and even more preferably 5 mass ppm or more in terms of the total mass in terms of oxide.
  • the total amount of the above components is preferably 5% by mass or less, more preferably 2% by mass or less, and even more preferably 1% by mass or less.
  • the glass plate in the first embodiment of the single glass of the present invention contains a colloid of at least one metal element selected from the group consisting of Group 1 to Group 14 from the viewpoint of causing surface plasmon absorption by the metal colloid.
  • the colloid to be contained for this purpose is preferably a colloidal particle having a particle size of 1 ⁇ m or less, more preferably 800 nm or less, more preferably 600 nm or less, more preferably 400 nm or less, and particularly preferably 300 nm or less.
  • the particle size of the colloidal particles in the glass is determined by image analysis using a transmission electron microscope (TEM).
  • the metal element is preferably at least one selected from the group consisting of Ag, Au, and Cu.
  • the glass plate in the first aspect of the sheet glasses of the present invention SO 3, Cl as a fining agent, 1 wt% in total of F or less, preferably may contain 0.5 mass%.
  • the wavelength selective transmission glass may contain Se, Co, Cr, V, other transition metal elements, etc. as a colorant in a total amount of 1% by mass or less, preferably 0.5% by mass or less.
  • the glass plate in the first embodiment of the single glass plate of the present invention preferably has a moisture content in the glass of 90 to 800 ppm by mass.
  • the glass forming zone temperature is lowered and bending is facilitated.
  • the infrared absorption intensity is increased and the heat shielding performance is improved.
  • the content is 800 ppm by mass or less, the stability of glass represented by water resistance and chemical resistance does not decrease, and resistance to cracks and scratches does not decrease.
  • the glass plate in the 1st aspect of the single plate glass of this invention can select the glass mother composition suitably according to the use.
  • the use of the first aspect of the single glass sheet of the present invention is a window glass for building materials, interior glass, automobile window glass, etc., SiO 2 : 60 to 80%, Al 2 O 3 : 0-7%, MgO: 0-10%, CaO: 4-20%, Na 2 O: 7-20%, K 2 O: 0-10% .
  • the glass matrix composition is expressed in terms of mass% on the basis of oxide, and SiO 2 : 45 to 80%, Al 2 O 3 : more than 7% and 30% or less, B 2 O 3 : 0-15%, MgO: 0-15%, CaO: 0-6%, Na 2 O: 7-20%, K 2 O: 0-10%, ZrO 2 : 0-10% It is preferable to perform chemical strengthening by ion exchange.
  • the glass matrix composition is expressed in terms of mass% based on oxides, and SiO 2 : 45 to 70%, Al 2 O 3 : 10 to 30%.
  • B 2 O 3 0 to 15%, at least one selected from the group consisting of MgO, CaO, SrO and BaO: 5 to 30%, selected from the group consisting of Li 2 O, Na 2 O and K 2 O It is preferable to contain at least one kind: 0% or more and 7% or less, particularly in terms of adjustment of an expansion coefficient for high weather resistance and a low expansion coefficient.
  • the heat shielding property is achieved by the Low-E film provided on one main surface of the glass plate, but the heat shielding property is achieved by the composition of the glass plate. Good.
  • an infrared absorbing ion is added to the glass substrate.
  • the glass substrate is made of soda lime silica, and it is possible to increase the absorption of divalent iron in the infrared region by adding a reducing agent, etc., and to impart heat ray absorbing ability.
  • a method of forming an application liquid in which an infrared shielding powder is dispersed in a matrix, and applying the application liquid on a glass substrate to form a film may be used.
  • This feature can be realized by highly dispersing the conductive oxide fine particles without aggregating them in the infrared shielding film, and plasma due to free electrons in the conductive oxide fine particles while maintaining a high visible light transmittance. It is possible to shield infrared rays by vibration.
  • the conductive oxide fine particles 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, and fine particles made of a dope doped with Sb or F.
  • these materials one kind selected from the group consisting of ATO (antimony-doped tin oxide) fine particles, zinc oxide fine particles, ITO (tin-doped indium oxide), and ITO containing fluorine (fluorine-containing ITO) fine particles
  • ATO antimony-doped tin oxide
  • ITO tin-doped indium oxide
  • ITO containing fluorine fluorine-containing ITO
  • the silicon oxide precursor examples include those obtained by hydrolysis and polycondensation of a silane compound, unmodified silicone resin, water glass, polysilazane, and the like.
  • the organic resin any material that does not impair transparency, such as an epoxy resin or an acrylic resin, can be used.
  • a method of forming an infrared ray shielding property by forming a heat ray reflective film on the glass surface instead of the Low-E film is also mentioned.
  • FIG. 2 is a diagram showing a configuration example of the second aspect of the single glass sheet of the present invention.
  • a single plate glass 20 shown in FIG. 2 is provided on any one main surface of the glass plate 21, the wavelength selective transmission film 22 provided on one main surface of the glass plate 21, and the glass plate 21.
  • the Low-E film 23 is used.
  • the wavelength selective transmission film 22 and the Low-E film 23 are provided on different main surfaces of the glass plate 21, but both are provided on the same main surface. May be. In this case, it is preferable that the Low-E film and the wavelength selective transmission film are provided in this order from the glass plate 21 side, from the viewpoint of heat shielding.
  • the Low-E film 23 may be provided on any main surface of the glass plate, but it is preferable to provide the Low-E film on the main surface which is the indoor side when the single plate glass of the present invention is used from the viewpoint of heat shielding properties.
  • the Low-E film is the same as described for the first aspect of the single glass sheet of the present invention.
  • the heat shielding property is achieved by the Low-E film provided on one main surface of the glass sheet.
  • the first aspect of the single glass sheet of the present invention has been described.
  • the heat shielding property may be achieved by the composition of the glass plate, or the heat shielding property may be achieved by providing a heat ray shielding film on one main surface of the glass plate.
  • At least one of the glass plate 21 and the wavelength selective transmission film 22 contains a component that emits light having a wavelength of 380 nm, since the effect of suppressing myopia progression is enhanced.
  • the light emitting component preferably emits light by absorbing light having a wavelength of less than 360 nm.
  • the wavelength at which light emission is maximum is preferably 360 nm or more, and more preferably in the range of 360 to 400 nm.
  • the thickness of the glass plate 21 is not particularly limited as long as a predetermined transmittance is obtained.
  • the use of the single plate glass of the present invention is a window glass of a building, it is generally 20 mm or less, 15 mm or less, 10 mm or less, 8 mm or less, 2 mm or more, 3 mm or more, 4 mm or more, and usually 6 mm.
  • the plate thickness is 1 to 5 mm.
  • the glass plate 21 preferably transmits 50% or more of light having a wavelength of 360 nm. This is because such a glass plate transmits light with a high myopia progression suppressing effect well and is easy to handle. This will be described below.
  • glass that does not contain a specific short wavelength light absorption component in the glass composition transmits light of 400 nm or less to some extent.
  • b in FIG. 10 shows an example of a transmission spectrum of a general window glass plate containing a small amount of Fe 2 O 3 .
  • b in FIG. 11 shows an example of a transmission spectrum of a glass plate for display that hardly contains a specific short wavelength light absorption component.
  • These general glass plates are preferable as the glass plate 21 because they transmit 50% or more of light having a wavelength of 360 nm and 80% or more of light having a wavelength of 380 nm.
  • Fe 2 O 3 contained in the ordinary window glass is a component contained as an impurity in the color tone adjusting agent, in the feedstock, and also functions as a specific short wavelength light absorbing component.
  • glass containing various specific short wavelength light absorbing components has been developed as an ultraviolet absorbing glass.
  • ultraviolet absorbing glasses contain metal ions as specific short wavelength light absorbing components. Since metal ions usually exhibit a relatively broad light absorption characteristic, many ultraviolet absorbing glasses absorb light in a wide wavelength range. In that case, a glass having a low transmittance of light having a wavelength of 360 nm also has a low transmittance of light having a wavelength of 380 nm. Therefore, it is necessary to appropriately blend these ultraviolet absorbing components.
  • an ultraviolet absorbing glass a glass that absorbs only a specific wavelength by, for example, precipitation of fine particles in the glass is also known.
  • such glasses are difficult to handle because they are thermally or chemically unstable.
  • the light transmittance T 400-760 nm of the glass plate 21 is not particularly limited and can be appropriately set according to the application of the glass article.
  • the glass composition of the glass plate 21 is not particularly limited as long as a desired transmittance can be obtained.
  • a glass composition of the glass plate 21 for example, soda lime glass used for general window glass, (no alkali) aluminoborosilicate glass used for a display substrate, alkali aluminosilicate glass used for chemical strengthening, It is preferable because it is excellent in strength and durability.
  • the glass plate is more preferably glass containing the aforementioned specific short wavelength light absorbing component.
  • the wavelength selective transmission film 22 preferably includes a component that absorbs light having a wavelength of less than 360 nm or a component that reflects or scatters light having a wavelength of less than 360 nm. In that case, the light transmittance of the single plate glass 20 is lower than the light transmittance of the glass plate 21.
  • the thickness of the wavelength selective transmission film 22 is not particularly limited as long as a desired transmittance can be obtained. However, in order to obtain more preferable light transmission characteristics, for example, the thickness is 1 ⁇ m or more, preferably 2 ⁇ m or more, and preferably 5 ⁇ m or more. More preferred. The thickness of the film is usually 100 ⁇ m or less.
  • the material of the wavelength selective transmission film 22 is not particularly limited, and may be an organic substance such as a resin or an inorganic substance.
  • the wavelength selective transmission film 22 preferably contains a specific short wavelength light absorbing component that absorbs light having a wavelength of less than 360 nm or a specific short wavelength light reflecting component that reflects light having a wavelength of less than 360 nm.
  • the entire wavelength selective transmission film 22 may be composed of a specific short wavelength light absorption component or a specific short wavelength light reflection component, and the specific short wavelength light absorption component or the specific short wavelength light reflection component in the matrix. May be dispersed or dissolved.
  • the specific short wavelength light reflection component may act as a component that scatters light having a wavelength of less than 360 nm (hereinafter also referred to as a specific short wavelength light scattering component).
  • the surface of the film is preferably composed of the specific short wavelength light reflection component from the viewpoint of stability of optical characteristics. Further, the specific short wavelength light reflection component is preferably arranged so that light having a wavelength of less than 360 nm is appropriately scattered.
  • the wavelength selective transmission film 22 is composed of a specific short wavelength light reflection component
  • the wavelength selective transmission film 22 is preferably composed of a dielectric laminated film. In that case, by appropriately designing the number of layers constituting the laminated film, the material of each layer, the arrangement order, and the like, it is possible to cause the laminated film to exhibit reflection characteristics of light having a wavelength of less than 360 nm (specific short wavelength light). .
  • the laminated film is formed by sequentially laminating a first layer, a second layer, a third layer, and a fourth layer from the side close to the first surface of the transparent substrate.
  • a configuration in which high “high refractive index layers” and low refractive index layers “low refractive index layers” are alternately laminated is preferable.
  • the first layer and the third layer have a higher refractive index than the second layer and the fourth layer.
  • the refractive index of the first layer and the third layer is preferably 2.0 or more, and more preferably 2.1 or more.
  • Examples of the material constituting such a “high refractive index layer” include titania, niobium oxide, zirconia, ceria, and tantalum oxide.
  • the thickness of the first layer is preferably 5 nm to 20 nm.
  • the thickness of the third layer is preferably 45 nm to 125 nm.
  • the third layer may be made of the same material as the first layer.
  • the refractive index of the second layer and the fourth layer is preferably 1.4 to 1.8.
  • Examples of the material constituting such a “low refractive index layer” include silica and alumina. Silica may be doped with other elements such as aluminum.
  • the thickness of the second layer is preferably 15 nm to 45 nm.
  • the thickness of the fourth layer is preferably 0 nm to 110 nm.
  • n is an integer of 5 or more.
  • the layer just below the outermost layer is a low refractive index layer, and the layer just below the outermost layer may be a high refractive index layer.
  • Each layer constituting the laminated film may be installed by any method.
  • Each layer can be formed by, for example, vapor deposition, sputtering, CVD (chemical vapor deposition), or the like.
  • the specific short wavelength light absorption component is dispersed with small particles that are uniformly dissolved or do not scatter light. Preferably it is. In such a case, the haze value becomes small.
  • the haze value of the film is preferably 20% or less, more preferably 10% or less, and still more preferably 1% or less.
  • the haze value is measured with a C light source using a haze measuring device (manufactured by Big Gardner, Hazeguard Plus).
  • the matrix component of the wavelength selective transmission film 22 preferably transmits light having a wavelength of more than 315 nm and not more than 400 nm.
  • an inorganic matrix such as silicon dioxide, an organic resin such as an epoxy resin, an acrylic resin, a polycarbonate resin, and a melamine resin. Examples thereof include a matrix and an organic / inorganic matrix in which an organic compound and an inorganic compound are combined.
  • the organic matrix is preferably a fluororesin from the viewpoint of transmitting light having a wavelength of more than 315 nm and not more than 400 nm.
  • the matrix component is preferably a compound that does not have absorption in the visible light range (400 to 760 nm; the same applies hereinafter), but may have absorption in the visible light range if coloring is allowed.
  • the specific short wavelength light absorption component is preferably a component that absorbs light having a wavelength of 315 nm or less.
  • the specific short wavelength light absorbing component may be a powder or a liquid.
  • a so-called ultraviolet absorber containing at least one selected from a benzotriazole compound, a triazine compound, a benzophenone compound, a malonic ester compound, and an oxalic anilide compound What is called.
  • benzotriazole compounds examples include 2- [5-chloro (2H) -benzotriazol-2-yl] -4-methyl-6- (tert-butyl) phenol, octyl-3- [3-tert-4 -Hydroxy-5- [5-chloro-2H-benzotriazol-2-yl] propionate, 2- (2H-benzotriazol-2-yl) -4,6-di-tert-pentylphenol, 2- (2- Hydroxy-5-methylphenyl) benzotriazole, 2- [2-hydroxy-3- (3,4,5,6-tetrahydrophthalimido-methyl) -5-methylphenyl] benzotriazole, 2- (2-hydroxy-5 -Tert-octylphenyl) benzotriazole, 2- (2-hydroxy-5-tert-butylphenyl) -2 -Benzotriazole, methyl 3- (3- (2H-benzotriazol-2-yl) -5-
  • triazine compound examples include 2- [4-[(2-hydroxy-3-dodecyloxypropyl) oxy] -2-hydroxyphenyl] -4,6-bis (2,4-dimethylphenyl) -1 , 3,5-triazine, 2- [4 - [(2-hydroxy-3- (2 '- ethyl) hexyl) oxy] -2-hydroxyphenyl] -4,6-bis (2,4-dimethylphenyl) 1,3,5-triazine, 2,4-bis (2-hydroxy-4-butoxyphenyl) -6- (2,4-bis-butoxyphenyl) -1,3,5-triazine and 2- (2 -Hydroxy-4- [1-octylcarbonylethoxy] phenyl) -4,6-bis (4-phenylphenyl) -1,3,5-triazine and the like.
  • benzophenone compounds include 2,4-dihydroxybenzophenone, 2,2 ′, 3-trihydroxybenzophenone, 2,2 ′, 4,4′-tetrahydroxybenzophenone, and 2,4-dihydroxy-2 ′, 4.
  • examples include '-dimethoxybenzophenone and 2-hydroxy-4-n-octoxybenzophenone.
  • malonic acid ester compound examples include [(4-methoxyphenyl) -methylene] -propanedioic acid dimethyl ester.
  • oxalic acid anilide compounds examples include N- (2-ethoxyphenyl) -N ′-(2-ethoxyphenyl) -ethanediamine, N- (4-dodecylphenyl) -N ′-(2-ethoxyphenyl). -Ethanediamine and the like.
  • these specific short-wavelength light absorbing components can be used alone or in combination of two or more.
  • the wavelength selective transmission film 22 contains a component that generates light emission.
  • the specific short wavelength light absorption component is more preferably a component that absorbs light having a wavelength of less than 360 nm and generates light having a wavelength of around 380 nm. By including such a component, it is possible to effectively transmit light having a high myopia suppression effect and block light in a harmful wavelength range.
  • fluorescent brighteners such as acid derivatives and bisstyryl biphenyl derivatives.
  • the specific short wavelength light-absorbing component and the light-emitting component are preferably compounds that do not have absorption at wavelengths in the visible light range, but if coloring is allowed, they may have absorption at wavelengths in the visible light range. Good.
  • a second form of the wavelength selective transmission glass article of the present invention is a laminated glass.
  • the laminated glass in this invention points out what a pair of glass plate joined through the contact bonding layer.
  • the laminated glass of the second form of the wavelength selective transmission glass article of the present invention (hereinafter referred to as the laminated glass of the present invention in the present specification) is a wavelength selective transmission laminated glass that satisfies the conditions described later.
  • the light transmittance T of more than 315 nm and 400 nm or less is 3% or more, more preferably 5% or more, more preferably 10% or more, and further preferably 20% or more. Preferably, it is 30% or more, more preferably 40% or more. In the laminated glass of the present invention, the light transmittance T 315 nm and 400 nm or less may be 100%.
  • the light transmittance T 315 nm or less is 60% or less, preferably 45% or less, more preferably 30% or less, and further preferably 15% or less. % Or less is particularly preferable, 1% or less is more preferable, and 0.8% or less is most preferable.
  • the laminated glass of the present invention may have a light transmittance T 315 nm or less of 0%.
  • the laminated glass of the present invention has a solar transmittance of 65% or less.
  • the laminated glass of the present invention has a solar heat gain rate of 0.70 or less.
  • the laminated glass of the present invention preferably has a light transmittance T 360-400 nm of 3% or more, more preferably 5% or more, more preferably 10% or more, and more preferably 20% or more. Is more preferably 30% or more, more preferably 40% or more, more preferably 60% or more, and particularly preferably 80% or more.
  • the laminated glass of the present invention may have a light transmittance T 360-400 nm of 100%.
  • the laminated glass of the present invention preferably has a solar heat gain of 0.70 or less, more preferably 0.60 or less, and particularly preferably 0.50 or less.
  • the laminated glass of the present invention preferably has a light transmittance T 400-760 nm of 1% or more, more preferably 10% or more, more preferably 20% or more, and 40% or more. Is more preferably 60% or more, more preferably 80% or more, and particularly preferably 90% or more.
  • the laminated glass of the present invention may have a light transmittance T 400-760 nm of 100%.
  • FIG. 3 is a cross-sectional view of one structural example of the laminated glass of the present invention.
  • the left side is the outdoor side
  • the right side is the indoor side.
  • the laminated glass 30 shown in FIG. 3 is attached to an opening such as a window or an interior building material, and transmits outdoor light such as sunlight to the room.
  • the window may be, for example, a building window or a vehicle window.
  • the laminated glass 30 shown in FIG. 3 transmits outdoor light such as sunlight into the room.
  • the laminated glass 30 has a first glass plate 31, a first adhesive layer 33, a light redirecting sheet 35, a second adhesive layer 34, and a second glass plate 32 in this order from the outdoor side toward the indoor side.
  • the light redirecting sheet has an arbitrary configuration.
  • the first glass plate and the second glass plate are directly bonded via an adhesive layer.
  • the first glass plate 31 is disposed on the outdoor side with respect to the light direction changing sheet 33.
  • the first glass plate 31 is untempered glass, chemically tempered glass, heat tempered glass, or the like.
  • Untempered glass is obtained by forming molten glass into a plate shape and slowly cooling it. Examples of the molding method include a float method and a fusion method.
  • Chemically tempered glass is obtained by strengthening the glass surface by generating a compressive stress on the glass surface by an ion exchange method or the like.
  • Thermally tempered glass strengthens the glass surface by rapidly cooling a uniformly heated glass plate from a temperature near the softening point and generating a compressive stress on the glass surface due to the temperature difference between the glass surface and the inside of the glass. .
  • the 1st glass plate 31 may be comprised with the wavelength selective transmission glass 1 or the wavelength selective transmission glass 2.
  • the first adhesive layer 33 bonds the light redirecting sheet 35 and the first glass plate 31.
  • the first adhesive layer 33 is made of a thermoplastic resin, a thermosetting resin, an ultraviolet curable resin, or the like.
  • the first adhesive layer 33 is preferably composed of at least one selected from a vinyl polymer, an ethylene-vinyl monomer copolymer, a styrene copolymer, a polyurethane resin, a fluororesin, and an acrylic resin.
  • a typical example of the thermoplastic resin is polyvinyl butyral resin (PVB).
  • a typical thermosetting resin is an ethylene-vinyl acetate copolymer resin (EVA).
  • the first adhesive layer 33 may contain an ultraviolet absorber.
  • an ultraviolet absorber a general thing can be used, for example, a benzotriazole type, a benzophenone type, a salicylate type, a cyanoacrylate type, a triazine type, an oxanilide type, a nickel complex type, an inorganic type, etc. can be used.
  • an inorganic type for example, particles of zinc oxide, titanium oxide, cerium oxide, zirconium oxide, mica, kaolin, sericite and the like can be used.
  • the second adhesive layer 34 may contain an ultraviolet absorber, like the first adhesive layer 33.
  • the material of the second adhesive layer 34 and the material of the first adhesive layer 33 can be shared, and the management cost and the manufacturing cost can be reduced.
  • the light redirecting sheet 35 redirects and transmits at least a part of the light traveling from the outdoor to the indoor, in other words, the light transmitted from one surface to the other surface. Since the light direction changing sheet 35 changes the direction of light from, for example, diagonally downward to diagonally upward, outdoor light such as sunlight can be taken into the interior of the room, and the feeling of brightness in the room can be improved.
  • the light redirecting sheet 35 redirects and transmits at least part of the light traveling from the outside to the room.
  • the light redirecting sheet 35 may be a general one, and is composed of, for example, a transparent sheet having a plurality of prism structures (uneven structure) formed on the surface, a transparent sheet having concave grooves formed in the sheet, or the like.
  • the light redirecting sheet 35 has a light redirecting surface having an uneven structure, and light is redirected on the light redirecting surface.
  • the light redirecting sheet 35 is disposed between the first glass plate 31 and the second glass plate 32 and is disposed inside the laminated glass 30. Therefore, damage to the light redirecting sheet 35 can be prevented, the penetration resistance of the laminated glass 30 is improved, and the crime prevention effect is improved.
  • the concave portion of the concavo-convex structure may be filled with a filler.
  • the refractive index of the filler is different from the refractive index of the transparent sheet. As the refractive index difference is larger on both sides of the light redirecting surface, total reflection is more likely to occur on the light redirecting surface.
  • the filler is selected so that total reflection is likely to occur. In other words, the filler is selected so that the refractive index difference becomes larger when the filler is filled in the recess than when the filler is not filled.
  • the light redirecting sheet 35 can be flattened by filling the concave portions of the concave-convex structure of the light redirecting sheet 35 with the filler.
  • the second adhesive layer 34 bonds the light redirecting sheet 35 and the second glass plate 32. Similar to the first adhesive layer 33, the second adhesive layer 34 is made of a thermoplastic resin, a thermosetting resin, an ultraviolet curable resin, or the like.
  • the second glass plate 32 is disposed on the indoor side with respect to the light redirecting sheet 35. Similar to the first glass plate 31, the second glass plate 32 is untempered glass, chemically tempered glass, heat tempered glass, or the like. Although described in detail later, the second glass plate 32 may be composed of the wavelength selective transmission glass 1 or the wavelength selective transmission glass 2.
  • the second glass plate 32 may be a template glass, frosted glass, or the like, and may have an uneven surface. In this case, the second glass plate 32 may be untempered glass excellent in workability.
  • the template glass is obtained by transferring a template pattern of a roll onto the surface of a glass plate.
  • the frosted glass is obtained by blasting the surface of a glass plate and further chemically treating it.
  • the indoor-side surface of the second glass plate 32 may be an uneven surface, and the uneven surface may form a light scattering surface. Since the refractive index is different between the left and right sides of the uneven surface, light is scattered when passing through the uneven surface, and glare caused by the uneven structure of the light redirecting sheet 35 can be alleviated.
  • the light scattering surface may be obtained by forming a film containing light scattering fine particles on the indoor surface of the second glass plate 32.
  • spherical particles As the shape of the light scattering fine particles, spherical particles, rod-shaped particles, flake shaped particles, needle shaped particles, etc. can be used. Of these, spherical particles and flake shaped particles have the effect of reducing glare. It is preferable because it is high.
  • silica As the light scattering fine particles, silica, titania, alumina, zirconia and the like can be used, but silica is preferable from the viewpoint of suppressing an increase in the refractive index of the film.
  • the particle diameter of the light scattering fine particles is preferably 0.3 to 2 ⁇ m, more preferably 0.5 to 1.5 ⁇ m. If the particle diameter is 0.3 ⁇ m or more, the light scattering effect is sufficiently exhibited. When the particle diameter is 2 ⁇ m or less, the dispersion stability in the coating solution is good. By setting it as such a particle size, optimal light scattering is obtained and the glare resulting from the uneven structure of the light redirecting sheet 35 can be reduced.
  • the particle diameter of the light-scattering fine particles is measured by a laser diffraction / scattering method.
  • An example of the measuring device is a laser diffraction / scattered particle size distribution measuring device (manufactured by Horiba, Ltd., trade name: LA-950). When it cannot measure well with the said method with flake shaped particle
  • the content of the light-scattering fine particles is preferably 0.3 to 30% by mass when the solid content of the film is 100% by mass because the light scattering effect can be sufficiently exhibited. Further, 0.5 to 5% by mass is preferable from the viewpoint of wear resistance.
  • the thickness of the film containing the light scattering fine particles can be appropriately prepared in the range of 0.3 ⁇ m to 10 ⁇ m. If the film thickness is thin, it is economical, and if the film thickness is thick, it is possible to impart wavelength selective transmission by adding an ultraviolet absorber.
  • the uneven surface as the light scattering surface may be disposed on the outdoor side with respect to the light redirecting sheet 35. Incident light on the light redirecting sheet 35 can be scattered, and glare caused by the uneven structure of the light redirecting sheet 35 can be reduced.
  • the first glass plate 31 may be a template glass, a frosted glass, or the like
  • the outdoor surface of the first glass plate 31 may be an uneven surface
  • the uneven surface may form a light scattering surface.
  • the laminated glass 30 shown in FIG. 3 has two glass plates, but may have three or more.
  • the laminated glass may have a third glass plate that is bonded to the first glass plate 31 on the outdoor side of the first glass plate 31.
  • the laminated glass 30 may have a 4th glass plate adhere
  • a 3rd glass plate and / or a 4th glass plate may be comprised with the wavelength selective transmission glass 1 or the wavelength selective transmission glass 2 mentioned later.
  • the color tone of the laminated glass of this invention can be suitably selected according to the use.
  • the main wavelength Dw measured using the A light source is used as an index of the color tone of the glass.
  • the main wavelength Dw measured using the A light source is 380 to 700 nm because it includes glasses of various colors according to the application.
  • a glass having a main wavelength Dw of 380 to 480 nm is a violet glass
  • a glass having a main wavelength Dw of 460 to 510 nm is a blue glass
  • a glass having a main wavelength Dw of 500 to 570 nm is a green glass.
  • the glass having a main wavelength Dw of 580 to 700 nm is a red glass.
  • the heat shielding property is achieved by providing a Low-E film on one of the main surfaces of the pair of glass plates.
  • the Low-E film is the same as described for the first aspect of the single glass sheet of the present invention.
  • the glass plate on which the Low-E film is provided and the main surface on which the Low-E film is provided are not particularly limited. Therefore, in the case of the laminated glass 30 shown in FIG. 3, the Low-E film may be provided on the first glass plate 31, or the Low-E film may be provided on the second glass plate 32.
  • a Low-E film may be provided on the main surface on the outdoor side of these glass plates, or a Low-E film may be provided on the main surface on the indoor side.
  • a Low-E film may be provided on the second glass plate. In this case, it may be provided on the main surface on the outdoor side or on the main surface on the indoor side.
  • the adhesive layer has heat-absorbing ability to achieve heat shielding properties.
  • the first adhesive layer 33 may be provided with a heat ray absorbing ability or the second adhesive layer 34 may be provided with a heat ray absorbing ability.
  • FIG. Specifically, it is preferable to mix ITO fine particles in the adhesive layer as an infrared shielding powder.
  • the third aspect of the laminated glass of the present invention is such that at least one of the pair of glass plates has a light transmittance T of more than 315 nm and not more than 400 nm of 3% or more when converted to a plate thickness of 6 mm, and a light transmittance of T 315 nm or less converted to a plate thickness of 6 mm
  • the wavelength selective transmission glass 1 is 60% or less.
  • either one of the pair of glass plates may be the wavelength selective transmission glass 1 or both may be the wavelength selective transmission glass 1.
  • the glass plate located on the outdoor side when the laminated glass is used is the wavelength selective transmission glass 1, and in the case of the laminated glass 30 shown in FIG. 3, the first glass plate 31 is preferably the wavelength selective transmission glass 1 for the following reason. If the first glass plate 31 located on the outdoor side is the wavelength selective transmission glass 1 having a light transmittance T 315 nm or less of 60% or less in terms of a plate thickness of 6 mm, the first glass plate 31 is located on the indoor side with respect to the first glass plate 31.
  • the 1st glass plate 31 is wavelength selective transmission glass 1 also from a viewpoint on manufacture of a glass plate. It is preferable that
  • the Low-E film is preferably provided on the main surface of the glass plate other than the wavelength selective transmission glass 1.
  • the wavelength selective transmission glass 1 has a light transmittance T of more than 315 nm and not more than 400 nm, preferably 5% or more, more preferably 10% or more, and more preferably 20%. More preferably, it is more preferably 30% or more, and particularly preferably 40% or more.
  • the wavelength selective transmission glass 1 may have a light transmittance T of more than 315 nm and not more than 400 nm of 100% in terms of a plate thickness of 6 mm.
  • the wavelength selective transmission glass 1 has a light transmittance T of 315 nm or less, preferably 45% or less, more preferably 30% or less, and more preferably 15% or less in terms of a plate thickness of 6 mm. More preferably, it is particularly preferably 5% or less, more preferably 1% or less, and most preferably 0.8% or less.
  • the wavelength selective transmission glass 1 may have a light transmittance T 315 nm or less of 0% in terms of a plate thickness of 6 mm.
  • the wavelength selective transmission glass 1 has a light transmittance T 360-400 nm of preferably 3% or more, more preferably 10% or more, more preferably 20% or more in terms of a plate thickness of 6 mm. More preferably, it is 30% or more, more preferably 40% or more, more preferably 60% or more, and particularly preferably 80% or more.
  • the wavelength selective transmission glass 1 may have a light transmittance T 360-400 nm of 100% in terms of a plate thickness of 6 mm.
  • the wavelength selective transmission glass 1 has a light transmittance T 400-760 nm of preferably 1% or more, more preferably 10% or more, more preferably 20% or more in terms of a plate thickness of 6 mm. More preferably, it is 40% or more, more preferably 60% or more, more preferably 80% or more, and particularly preferably 90% or more.
  • the wavelength selective transmission glass 1 may have a light transmittance T 400-760 nm of 100% in terms of a plate thickness of 6 mm.
  • the wavelength selective transmission glass 1 preferably has a main wavelength Dw measured using an A light source of 380 to 700 nm in terms of a plate thickness of 6 mm.
  • the glass plate shown in the first aspect of the single plate glass can be used.
  • At least one of the pair of glass plates includes a glass plate and a film provided on the main surface of the glass plate, and a light transmittance T of 315 nm to 400 nm or less is 3 % Is a wavelength selective transmission glass 2 having a light transmittance T of 315 nm or less of 60% or less.
  • either one of the pair of glass plates may be the wavelength selective transmission glass 2 or both may be the wavelength selective transmission glass 2.
  • the glass plate located on the outdoor side when the laminated glass is used is the wavelength selective transmission glass 2.
  • the first glass The plate 31 is preferably the wavelength selective transmission glass 2 for the following reason. If the first glass plate 31 located on the outdoor side is the wavelength selective transmission glass 2 having a light transmittance T 315 nm or less of 60% or less, the first adhesive layer 33 located on the indoor side with respect to the first glass plate 31. The light deterioration of the light redirecting sheet 35 and the second adhesive layer 34 can be suppressed.
  • the 1st glass plate 31 is also considered as a wavelength selective glass article also from a viewpoint on manufacture of a glass plate. It is preferable to do.
  • the Low-E film is preferably provided on the main surface of the glass plate other than the wavelength selective transmissive glass 2.
  • the wavelength selective transmission glass 2 preferably has a light transmittance T of more than 315 nm and not more than 400 nm of 5% or more, more preferably 10% or more, and more preferably 20% or more. More preferably, it is more preferably 30% or more, and particularly preferably 40% or more.
  • the wavelength selective transmission glass 2 may have a light transmittance T of more than 315 nm and less than 400 nm of 100%.
  • the wavelength selective transmission glass 2 preferably has a light transmittance T of 315 nm or less of 45% or less, more preferably 30% or less, and even more preferably 15% or less. It is particularly preferably 5% or less, more preferably 1% or less, and most preferably 0.8% or less.
  • the wavelength selective transmission glass 2 may have a light transmittance T 315 nm or less of 0%.
  • the wavelength selective transmission glass 2 has a light transmittance T 360-400 nm of preferably 3% or more, more preferably 10% or more, and more preferably 20% or more. Preferably, it is 30% or more, more preferably 40% or more, more preferably 60% or more, and particularly preferably 80% or more.
  • the wavelength selective transmission glass 2 may have a light transmittance T 360-400 nm of 100%.
  • the wavelength selective transmission glass 2 preferably has a light transmittance T 400-760 nm of 1% or more, more preferably 10% or more, and more preferably 20% or more. Preferably, it is 40% or more, more preferably 60% or more, more preferably 80% or more, and particularly preferably 90% or more.
  • the wavelength selective transmission glass 2 may have a light transmittance T 400-760 nm of 100%.
  • the wavelength selective transmission glass 2 preferably has a light transmittance of a wavelength of 380 nm of 60% or more, and more preferably 80% or more.
  • the wavelength selective transmissive glass 2 may have a transmittance of light having a wavelength of 380 nm of 100%.
  • the wavelength-selective transmissive glass 2 preferably has a light transmittance of a wavelength of 350 nm of 30% or less, more preferably 20% or less, and more preferably 10% or less. preferable.
  • the wavelength selective transmission glass 2 may have a transmittance of light having a wavelength of 350 nm of 0%.
  • the wavelength selective transmission glass 2 preferably has a light transmittance of 315 nm at a wavelength of 10% or less, more preferably 5% or less, and particularly preferably 1% or less. preferable.
  • the wavelength selective transmissive glass 2 may have a transmittance of light having a wavelength of 315 nm of 0%.
  • the combination of the glass plate and the wavelength selective transmission film shown in the second aspect of the single plate glass can be used.
  • the fifth aspect of the laminated glass of the present invention achieves wavelength selective transparency of the laminated glass by making the adhesive layer wavelength selective transparent. Thereby, the choice of a pair of glass plate spreads, and it is possible to provide the designability to a laminated glass.
  • the light transmittance T 315 nm to 400 nm or less of the adhesive layer is 3% or more, preferably 5% or more, more preferably 10% or more, and more preferably 20% or more. Is more preferably 30% or more, and particularly preferably 40% or more.
  • the adhesive layer may have a light transmittance T of more than 315 nm and not more than 400 nm of 100%.
  • the light transmittance T 315 nm or less of the adhesive layer is 60% or less, preferably 45% or less, more preferably 30% or less, and 15% or less. More preferably, it is particularly preferably 5% or less, further preferably 1% or less, and most preferably 0.8% or less.
  • the light transmittance T 315 nm or less of the adhesive layer may be 0%.
  • the adhesive layer preferably has a light transmittance T 360-400 nm of 3% or more, more preferably 10% or more, more preferably 20% or more, and 30%. More preferably, it is 40% or more, more preferably 60% or more, and particularly preferably 80% or more.
  • the adhesive layer may have a light transmittance T 360-400 nm of 100%.
  • the adhesive layer preferably has a light transmittance T 400-760 nm of 1% or more, more preferably 10% or more, more preferably 20% or more, and 40% More preferably, it is 60% or more, more preferably 80% or more, and particularly preferably 90% or more.
  • the adhesive layer may have a light transmittance T 400-760 nm of 100%.
  • the adhesive layer preferably has a transmittance of light having a wavelength of 380 nm of 60% or more, and more preferably 80% or more.
  • the adhesive layer may have a light transmittance of 100% at a wavelength of 380 nm.
  • the adhesive layer preferably has a light transmittance of a wavelength of 350 nm of 30% or less, more preferably 20% or less, and even more preferably 10% or less.
  • the adhesive layer may have a transmittance of light having a wavelength of 350 nm of 0%.
  • the adhesive layer preferably has a light transmittance of 315 nm at a wavelength of 10% or less, more preferably 5% or less, and particularly preferably 1% or less.
  • the adhesive layer may have a light transmittance of 0% at a wavelength of 315 nm.
  • Adhesive layer examples of the material for the adhesive layer include ethylene-vinyl acetate copolymer, polyvinyl butyral (hereinafter referred to as “PVB”), an acrylic pressure-sensitive adhesive, and a thermoplastic resin composition.
  • the material of each adhesive layer may be the same or different.
  • the thermoplastic resin contained in the thermoplastic resin composition include plasticized polyvinyl acetal, plasticized polyvinyl chloride, saturated polyester, plasticized saturated polyester, polyurethane, plasticized polyurethane, ethylene-vinyl acetate copolymer, ethylene -Ethyl acrylate copolymer and the like.
  • the thickness of the adhesive layer is not particularly limited as long as the function as the adhesive layer is maintained. For example, 0.01 to 1.5 mm is preferable, and 0.05 to 1 mm is more preferable.
  • the adhesive layer can impart wavelength selective transparency by adding a predetermined ultraviolet absorber. Specifically, wavelength selective transparency can be imparted by adding an ultraviolet absorber having a high action of absorbing ultraviolet rays having a wavelength of less than 360 nm.
  • Examples of the ultraviolet absorber having a high action of absorbing ultraviolet rays having a wavelength of less than 360 nm include benzophenone ultraviolet absorbers, oxalic anilide ultraviolet absorbers, hydroxyphenyltriazine ultraviolet absorbers, and inorganic ultraviolet absorbers.
  • examples of inorganic ultraviolet absorbers that can be used include particles of zinc oxide, titanium oxide, cerium oxide, zirconium oxide, mica, kaolin, sericite, and the like. When the ultraviolet absorber is selected, light harmful to the eyes can be absorbed, and light useful for suppressing the progression of myopia can be transmitted.
  • benzophenone ultraviolet absorbers, oxalic anilide ultraviolet absorbers, and hydroxyphenyltriazine ultraviolet absorbers are preferable because they can efficiently absorb ultraviolet rays having a wavelength of less than 360 nm.
  • FIG. 5 is a transmission spectrum of an oxalic anilide ultraviolet absorber and a hydroxyphenyltriazine ultraviolet absorber and a benzotriazole ultraviolet absorber widely used as an ultraviolet absorber.
  • the transmission spectrum shown in FIG. 5 was measured under the following conditions. Cell length: 10mm Solvent: Cyclohexanone concentration: 10 mg / 1 L
  • the oxalic acid anilide UV absorber and hydroxyphenyltriazine UV absorber have lower transmittance on the shorter wavelength side than benzotriazole UV absorbers widely used as UV absorbers. It can be confirmed that the action of absorbing ultraviolet rays having a wavelength of less than 360 nm is high.
  • FIG. 6 is a transmission spectrum of a PVB layer (thickness 0.76 mm) to which 0.2% by mass of a hydroxyphenyltriazine-based UV absorber or 5% by mass of a benzotriazole-based UV absorber is added.
  • the PVB layer to which the hydroxyphenyltriazine-based UV absorber is added has an ultraviolet light wavelength of 360 nm or more as compared with the PVB layer to which a benzotriazole-based UV absorber widely used as an UV absorber is added. It can be confirmed that the transmittance is high and the specific wavelength selective transparency is exhibited.
  • the amount of the UV absorber added to the adhesive layer is preferably 0.1 to 10% by mass, although it depends on the thickness of the adhesive layer.
  • the addition amount is 0.1 to 10% by mass, it is possible to transmit useful light and absorb harmful light. If it is 0.1% by mass or less, harmful light cannot be sufficiently absorbed, and if it is more than 10% by mass, it may bleed out from the adhesive layer, resulting in poor adhesion.
  • These may use 1 type and can also use 2 or more types together.
  • the ultraviolet absorbent may be added to only one of the first adhesive layer 33 and the second adhesive layer 34, or may be added to both.
  • the constituent materials of the first adhesive layer 33 and the second adhesive layer 34 can be shared, and the management cost and manufacturing Cost can be reduced.
  • the laminated glass of the present invention may achieve the wavelength selective transparency of the laminated glass by making the components other than those described above wavelength selective, in the case of the laminated glass 30 shown in FIG.
  • the wavelength selective transparency of the laminated glass 30 may be achieved by making the conversion sheet 35 have wavelength selective transparency.
  • the laminated glass may be formed using the wavelength selective transmission glass having the specific composition shown in the first mode of the single plate glass, and in the second mode of the single plate glass.
  • a laminated glass may be formed using the combination of the glass plate and the wavelength selective transmission film shown, and an infrared shielding powder and an ultraviolet absorber may be added to the adhesive layer.
  • the 3rd form of the wavelength selective transmission glass article of the present invention is a double layer glass.
  • the multilayer glass in the present invention has a plurality of glass plates arranged at intervals.
  • the multi-layer glass of the third form of the wavelength selective transmission glass article of the present invention (hereinafter referred to as the multi-layer glass of the present invention in the present specification) is a wavelength selective transmission multi-layer glass that satisfies the conditions described later. It is.
  • the multilayer glass of the present invention has a light transmittance T of more than 315 nm and not more than 400 nm of 3% or more in terms of a plate thickness of 6 mm, more preferably 5% or more, more preferably 10% or more, and more preferably 20% More preferably, it is more preferably 30% or more, and particularly preferably 40% or more.
  • the light transmittance T 315 nm and 400 nm or less may be 100% in terms of a plate thickness of 6 mm.
  • the light transmittance T 315 nm or less is 60% or less in terms of plate thickness 6 mm, preferably 45% or less, more preferably 30% or less, and more preferably 15% or less. Is more preferably 5% or less, still more preferably 1% or less, and most preferably 0.8% or less.
  • the multilayer glass of the present invention may have a light transmittance T 315 nm or less of 0% in terms of a plate thickness of 6 mm.
  • the multi-layer glass of the present invention has a solar transmittance of 65% or less.
  • the multi-layer glass of the present invention has a solar heat gain rate of 0.70 or less.
  • the multi-layer glass of the present invention has a light transmittance T 360-400 nm of preferably 3% or more, more preferably 5% or more, more preferably 10% or more, and more preferably 20% or more. More preferably, it is 30% or more, more preferably 40% or more, more preferably 60% or more, and particularly preferably 80% or more.
  • the multilayer glass of the present invention may have a light transmittance T 360-400 nm of 100%.
  • the multi-layer glass of the present invention preferably has a light transmittance T 400-760 nm of 1% or more, more preferably 10% or more, more preferably 20% or more, and more than 40%. More preferably, it is 60% or more, more preferably 80% or more, and particularly preferably 90% or more.
  • the multilayer glass of the present invention may have a light transmittance T 400-760 nm of 100%.
  • the multilayer glass of the present invention preferably has a solar heat gain of 0.70 or less, more preferably 0.60 or less, and particularly preferably 0.50 or less.
  • FIG. 4 is a cross-sectional view of one structural example of the multilayer glass of the present invention.
  • two glass plates 41 and 42 are arranged so as to face each other with a spacer 43 interposed therebetween.
  • the multi-layer glass 40 shown in FIG. 4 has a gas layer 44 defined by two glass plates 41 and 42 and a spacer 43.
  • Glass plate It does not specifically limit as the glass plates 41 and 42 which comprise a multilayer glass, A well-known various glass plate can be used. Specifically, float plate glass, polished plate glass, mold plate glass, wire-inserted plate glass, heat-absorbing plate glass, laminated glass using them, tempered glass (air-cooled tempered glass, chemically tempered glass) and the like can be mentioned.
  • the material of the glass plates 41 and 42 is not particularly limited, and for example, various glasses such as soda lime glass and non-alkali glass can be used.
  • the thickness of the glass plates 41 and 42 is not particularly limited, and can be selected according to the strength, size, heat insulation performance, etc. required for the multi-layer glass, but is preferably 1 mm to 10 mm. .
  • the multilayer glass is composed of a plurality of glass plates, but the thickness of each glass plate may be the same or a combination of glass plates having different thicknesses may be used.
  • the gas layer 44 is a layer (space) provided between the glass plates, and can be an air layer without performing replacement with gas. Moreover, it can be set as the layer replaced with various gas, for example, the heat insulation gas layer substituted with heat insulation gas, such as Ar and Kr, or it can also be set as the pressure_reduction
  • the thickness (width) of the gas layer 44 is not particularly limited, and can be selected according to the required thickness of the multilayer glass, heat insulation performance, and the like. Specifically, for example, the thickness is preferably 2 mm to 20 mm, and more preferably 3 mm to 16 mm.
  • the thickness of the gas layer 44 referred to here is the distance from the surface of the film when a low-E film, a wavelength selective transmission film, or the like is provided on the inner main surface of the glass plates 41, 42. means.
  • the spacer 43 is not particularly limited as long as it can hold and seal between glass plates at a predetermined interval. Specifically, it can be made of, for example, resin, glass, or metal. Further, a desiccant may be disposed in the spacer in order to reduce the humidity in the gas layer 44 so that condensation does not occur on the main surfaces of the glass plates 41 and 42 on the gas layer 44 side.
  • At least one of the glass plates constituting the multilayer glass has a light transmittance of more than 315 nm and not more than 400 nm of 3% or more in terms of a plate thickness of 6 mm, and a light transmittance of T 315 nm or less.
  • a wavelength-selective transmissive glass 3 having a thickness of 60 mm or less in terms of a plate thickness of 6 mm
  • a Low-E film is provided on any one main surface of any one glass plate constituting the multilayer glass.
  • the Low-E film is the same as described for the first aspect of the single glass sheet of the present invention.
  • the Low-E film is preferably provided on the main surface of the glass plate other than the wavelength selective transmission glass 3.
  • the main surface on which the Low-E film is provided is not particularly limited.
  • the Low-E film generally has low scratch resistance and is easily damaged, and the film is corroded by moisture in the atmosphere due to low moisture resistance. Since there is a possibility, in order to reduce the chance of contact with dust or the like that causes outside air or scratches, the surfaces of the glass plates constituting the multilayer glass facing each other, that is, in the sealed region (the gas layer 44). In).
  • the multi-layer glass 40 of FIG. 4 it is preferably provided on the main surface of the glass plate 41 facing the gas layer 44 or the main surface of the glass plate 42 facing the gas layer 44. About this point, it is the same also about the 2nd aspect of the multilayer glass mentioned later.
  • any one of the plurality of glass plates may be the wavelength selective transmission glass 3, and the two or more glass plates may be the wavelength selective transmission glass 3.
  • the wavelength selective transmission glass 3 has a light transmittance T of more than 315 nm and not more than 400 nm, preferably 5% or more, more preferably 10% or more in terms of a plate thickness of 6 mm, 20 % Or more, more preferably 30% or more, and particularly preferably 40% or more.
  • the wavelength selective transmission glass 3 may have a light transmittance T of more than 315 nm and not more than 400 nm of 100% in terms of a plate thickness of 6 mm.
  • the wavelength selective transmission glass 3 has a light transmittance T of 315 nm or less, preferably 45% or less, more preferably 30% or less, and more preferably 15% or less in terms of a plate thickness of 6 mm. Is more preferably 5% or less, still more preferably 1% or less, and most preferably 0.8% or less.
  • the wavelength selective transmission glass 3 may have a light transmittance T 315 nm or less of 0% in terms of a plate thickness of 6 mm.
  • the wavelength selective transmission glass 3 has a light transmittance T 360-400 nm of preferably 3% or more, more preferably 10% or more, more preferably 20% in terms of a plate thickness of 6 mm. More preferably, it is 30% or more, more preferably 40% or more, more preferably 60% or more, and particularly preferably 80% or more.
  • the wavelength selective transmission glass 3 may have a light transmittance T 360-400 nm of 100% in terms of a plate thickness of 6 mm.
  • the wavelength selective transmission glass 3 has a light transmittance T 400-760 nm of preferably 1% or more, more preferably 10% or more, more preferably 20% in terms of a plate thickness of 6 mm. More preferably, it is 40% or more, more preferably 60% or more, more preferably 80% or more, and particularly preferably 90% or more.
  • the wavelength selective transmission glass 3 may have a light transmittance T 400-760 nm of 100% in terms of a plate thickness of 6 mm.
  • the wavelength selective transmission glass 3 preferably has a main wavelength Dw measured using an A light source of 380 to 700 nm in terms of a plate thickness of 6 mm.
  • the glass plate shown in the first aspect of the single plate glass can be used.
  • At least one of the plurality of glass plates includes a glass plate and a film provided on the main surface of the glass plate, and has a light transmittance T of 315 nm to 400 nm or less.
  • a wavelength selective transmission glass 4 having a transmittance of 3% or more and a light transmittance T of 315 nm or less of 60% or less, and a Low-E film is provided on any one main surface of any one glass plate constituting the multilayer glass. It has been.
  • the Low-E film is the same as described for the first aspect of the single glass sheet of the present invention.
  • the Low-E film is preferably provided on the main surface of the glass plate other than the wavelength selective transmission glass 4.
  • any one of the plurality of glass plates may be the wavelength selective transmission glass 4, and the two or more glass plates may be the wavelength selective transmission glass 4.
  • the wavelength selective transmission glass 4 has a light transmittance T of more than 315 nm and not more than 400 nm, preferably 5% or more, more preferably 10% or more, and 20% or more. Is more preferably 30% or more, and particularly preferably 40% or more.
  • the wavelength selective transmission glass 4 may have a light transmittance T of more than 315 nm and less than 400 nm of 100%.
  • the wavelength selective transmission glass 4 preferably has a light transmittance T 315 nm or less of 45% or less, more preferably 30% or less, and further preferably 15% or less. It is preferably 5% or less, more preferably 1% or less, and most preferably 0.8% or less.
  • the wavelength selective transmission glass 4 may have a light transmittance T 315 nm or less of 0%.
  • the wavelength selective transmission glass 4 preferably has a light transmittance T 360-400 nm of 3% or more, more preferably 10% or more, and more preferably 20% or more. More preferably, it is more preferably 30% or more, more preferably 40% or more, more preferably 60% or more, and particularly preferably 80% or more.
  • the wavelength selective transmission glass 4 may have a light transmittance T 360-400 nm of 100%.
  • the wavelength selective transmission glass 4 preferably has a light transmittance T 400-760 nm of 1% or more, more preferably 10% or more, and more preferably 20% or more. More preferably, it is 40% or more, more preferably 60% or more, more preferably 80% or more, and particularly preferably 90% or more.
  • the wavelength selective transmission glass 4 may have a light transmittance T 400-760 nm of 100%.
  • the wavelength selective transmission glass 4 preferably has a light transmittance of 380 nm at a wavelength of 60% or more, more preferably 80% or more.
  • the wavelength selective transmissive glass 4 may have a transmittance of light having a wavelength of 380 nm of 100%.
  • the wavelength selective transmission glass 4 preferably has a light transmittance of a wavelength of 350 nm of 30% or less, more preferably 20% or less, and more preferably 10% or less. More preferred.
  • the wavelength selective transmission glass 4 may have a transmittance of light having a wavelength of 350 nm of 0%.
  • the wavelength selective transmission glass 4 preferably has a light transmittance of 315 nm at a wavelength of 10% or less, more preferably 5% or less, and preferably 1% or less. Particularly preferred.
  • the wavelength selective transmission glass 4 may have a light transmittance of 315 nm of 0%.
  • wavelength selective transmission glass 2 in the second aspect of the multilayer glass a combination of the glass plate and the wavelength selective transmission film shown in the second aspect of the single plate glass can be used.
  • Example 1-1 to 1-29 the wavelength selective transmission glass 1 used in the first aspect of the laminated glass of the present invention was produced by the following procedure.
  • glass materials such as oxides are appropriately selected so that the glass compositions shown in the following Tables 1 to 6 are obtained, and the mixture is put into a platinum crucible and put into a resistance heating electric furnace at 1600 ° C. Melted for 3 hours, defoamed and homogenized, poured into mold material, kept at a temperature about 30 ° C higher than the glass transition point for 1 hour or longer, and then cooled at a cooling rate of 0.3-1 ° C per minute The plate-like glass samples (thickness 6 mm) of Examples 1-1 to 1-29 were produced.
  • Fe-Redox was calculated from the spectrum curve of the glass sample measured with a spectrophotometer, using the following formula (1).
  • Fe-Redox (%) -log e (T 1000 nm /91.4)/(Fe 2 O 3 amount ⁇ t ⁇ 20.79) ⁇ 100 (1).
  • T 1000 nm is the transmittance (%) at a wavelength of 1000 nm measured by a spectrophotometer (Perkin Elmer, Lambda 950).
  • t is the thickness (cm) of the glass sample;
  • the light transmittance T of 315 nm to 400 nm or less is 3% or more and the light transmittance T 315 nm or less of wavelength 315 nm or less is 60% or less. there were.
  • the glass of Examples 1-1 to 1-29 is used as the wavelength selective transmission glass 1 of the first aspect of the laminated glass of the present invention, the light transmittance T of the single plate exceeds 315 nm and not more than 400 nm is 3% or more.
  • the light transmittance T 315 nm or less is considered to be 60% or less.
  • Example 1A A glass article of Example 1A was prepared by replacing the base plate of “trade name: Suncut ⁇ Clear” glass with a heat ray reflective film manufactured by Asahi Glass Co., Ltd. with a glass having the composition of Example 1-22. The glass thickness was 6 mm.
  • the glass article of Example 1A has a heat ray shielding film and has wavelength selective transmission useful for suppressing the progression of myopia.
  • Comparative Example 1B A glass plate having a composition of Example 1-22 and having a thickness of 6 mm was used as a glass article of Comparative Example 1B.
  • the glass article of Comparative Example 1B does not have a heat ray shielding film and has wavelength selective transparency useful for suppressing the progression of myopia.
  • Comparative Example 1C Asahi Glass Co., Ltd. glass with heat ray reflective film “trade name: Suncut ⁇ Clear” was designated as Comparative Example 1C.
  • the glass is a 6 mm thick soda lime glass plate (manufactured by Asahi Glass Co., Ltd., trade name: transparent float plate glass).
  • the glass article of Comparative Example 1C has a heat ray shielding film and does not have wavelength selective transmission useful for suppressing the progression of myopia.
  • Comparative Example 1D A soda-lime glass plate (trade name: transparent float plate glass manufactured by Asahi Glass Co., Ltd.) having a thickness of 6 mm was used as Comparative Example 1D. Comparative Example 1D does not have both heat shielding properties and wavelength selective transparency useful for suppressing the progression of myopia.
  • Example 1A With respect to the glass articles of Example 1A, Comparative Example 1B, Comparative Example 1C, and Comparative Example 1D, spectral transmittance was measured using JIS R3106-1998. A transmission spectrum at a wavelength of 300 to 400 nm is shown in FIG.
  • the glass of Example 1A transmits light (T 380 nm ) useful for suppressing the progression of myopia while suppressing the transmittance of short-wavelength light harmful to the eyes (T 350 nm ), in addition to the transmission of solar radiation and solar heat. It can be seen that the acquisition is suppressed and a heat shielding effect is provided.
  • the glass of Comparative Example 1B can transmit light (T 380 nm ) useful for suppressing the progression of myopia while suppressing the transmittance (T 350 nm ) of short-wavelength light harmful to the eyes. High solar radiation acquisition rate and poor heat insulation.
  • the glass of Comparative Example 1C has a certain heat shielding effect, it has a high transmittance (T 350 nm ) of light having a short wavelength harmful to eyes. Further, the glass of Comparative Example 1D has poor heat-shielding properties, and has a high light transmittance (T 350 nm ) that is harmful to the eyes.
  • Example 2-1 the wavelength selective transmission glass 2 used for the second aspect of the laminated glass of the present invention was produced by the following procedure.
  • Example 2-1 On a 2 mm-thick alkali aluminosilicate glass plate (Asahi Glass Co., Ltd., trade name: Dragontrail), a laminated film composed of a total of four layers consisting of a first layer to a fourth layer was formed by sputtering. This laminated film is made of a specific short wavelength light reflection component.
  • the laminated film has the following layer structure from the side close to the glass plate: First layer: Nb 2 O 5 layer, thickness 29.0 nm, Second layer: SiO 2 layer, thickness 22.3 nm, Third layer: Nb 2 O 5 layer, thickness 102.1 nm, Fourth layer: SiO 2 layer, thickness 96.1 nm.
  • the first and third layers were formed by sputtering using an NbO x target (x ⁇ 2) as a target under an Ar + O 2 atmosphere (oxygen 8 vol%).
  • the sputtering pressure was 0.37 Pa.
  • the second and fourth layers were formed by sputtering using an Si target as a target under an Ar + O 2 atmosphere (oxygen 60 vol%).
  • the sputtering pressure was 0.17 Pa.
  • Table 8 summarizes the transmittance T 380 nm of light having a wavelength of 400 to 760 nm, the wavelength 380 nm , the transmittance T 350 nm of light having a wavelength of 350 nm , and the transmittance T 315 nm of light having a wavelength of 315 nm .
  • Table 8 shows the transmittance of light having a wavelength of 350 nm of the glass plate.
  • Example 2-2 In the same manner as in Example 2-1, on the alkali aluminosilicate glass plate (made by Asahi Glass Co., Ltd., trade name: Dragonrail) having a thickness of 2 mm, a total of the first to eighth layers was formed by sputtering. A laminated film consisting of 8 layers was formed. This laminated film is made of a specific short wavelength light reflection component.
  • the laminated film has the following layer structure from the side close to the glass plate: First layer: Nb 2 O 5 layer, thickness 0.6 nm, Second layer: SiO 2 layer, thickness 87.2 nm, Third layer: Nb 2 O 5 layer, thickness 13.8 nm, Fourth layer: SiO 2 layer, thickness 45.6 nm, Fifth layer: Nb 2 O 5 layer, thickness 34.1 nm, Sixth layer: SiO 2 layer, thickness 23.4 nm, Seventh layer: Nb 2 O 5 layer, thickness 31.0 nm, Eighth layer: SiO 2 layer, thickness 98.1 nm.
  • Nb 2 O 5 and SiO 2 films were formed on the back surface to obtain a wavelength selective transmission glass article.
  • the laminated film on the back surface has the following layer structure from the side close to the glass plate: First layer: Nb 2 O 5 layer, thickness 6.6 nm, Second layer: SiO 2 layer, thickness 79.0 nm, Third layer: Nb 2 O 5 layer, thickness 20.0 nm, Fourth layer: SiO 2 layer, thickness 38.6 nm, Fifth layer: Nb 2 O 5 layer, thickness 39.1 nm, Sixth layer: SiO 2 layer, thickness 20.4 nm, Seventh layer: Nb 2 O 5 layer, thickness 35.0 nm, Eighth layer: SiO 2 layer, thickness 101.0 nm.
  • FIG. 9 shows a transmission spectrum at a wavelength of 300 nm to 400 nm of a glass article in which a laminated film is formed on both sides. Further, the transmittance is shown in Table 8 in the same manner as in Example 2-1.
  • Example 2-3 50 g of alcohol solvent (manufactured by Nippon Alcohol Sales Co., Ltd., trade name: Solmix AP-1), 12 g of tetramethoxysilane, 3.8 g of 3-glycidoxypropyltrimethoxysilane, 2- [4-[(2-hydroxy- 3- (2′-ethyl) hexyl) oxy] -2-hydroxyphenyl] -4,6-bis (2,4-dimethylphenyl) -1,3,5-triazine (10 g), acetic acid (11 g), and ion-exchanged water (11 g) A coating solution was obtained by mixing.
  • This coating solution has 2- [4-[(2-hydroxy-3- (2′-ethyl) hexyl) oxy] -2-hydroxyphenyl] -4,6-bis (2,4) as a specific short wavelength light absorbing component.
  • 2- [4-[(2-hydroxy-3- (2′-ethyl) hexyl) oxy] -2-hydroxyphenyl] -4,6-bis (2,4) as a specific short wavelength light absorbing component.
  • -Dimethylphenyl) -1,3,5-triazine, and tetramethoxysilane and 3-glycidoxypropyltrimethoxysilane as matrix components.
  • the above-mentioned coating liquid is applied with an applicator on a 2 mm thick soda lime glass plate (trade name: transparent float plate glass, manufactured by Asahi Glass Co., Ltd.) and dried at 150 ° C. for 30 minutes to obtain a wavelength selective transmission glass article. It was.
  • the transmission spectrum is shown by a in FIG. Further, the transmittance is shown in Table 8 in the same manner as in Example 2-1.
  • the broken line b in FIG. 10 is a transmission spectrum of the 2 mm-thick soda-lime glass plate (reference example) in which the above-mentioned film is not formed.
  • Example 2-4 A wavelength selective transmission glass article was obtained in the same manner as in Example 2-3 except that an alkali aluminosilicate glass plate having a thickness of 0.5 mm (Asahi Glass Co., Ltd., trade name: Dragontrail) was used.
  • the transmission spectrum is shown in a in FIG. Further, the transmittance is shown in Table 8 in the same manner as in Example 2-1.
  • the broken line b in FIG. 11 is a transmission spectrum of the alkali aluminosilicate glass plate (reference example) of thickness 0.5mm which does not form the above-mentioned film
  • Example 2-5 54.6 g of butyl acetate (manufactured by Junsei Kagaku Co., Ltd.), 45.4 g of a silicone acrylic resin solution (manufactured by DIC: BZ-1160) as a matrix component, [(4-methoxyphenyl) -methylene] -propanedioic acid 0.02 g of dimethyl ester (manufactured by Clariant Japan, trade name: PR25) was mixed to obtain a coating solution.
  • This coating solution contains [(4-methoxyphenyl) -methylene] -propanedioic acid dimethyl ester as a specific short wavelength light absorbing component, and a silicon / acrylic resin as a matrix component.
  • a wavelength having a 6 ⁇ m thick film by applying the above coating solution on a 2 mm thick soda lime glass plate (trade name: transparent float plate glass, manufactured by Asahi Glass Co., Ltd.) with an applicator and drying at 100 ° C. for 30 minutes. A selectively permeable glass article was obtained.
  • soda lime glass plate trade name: transparent float plate glass, manufactured by Asahi Glass Co., Ltd.
  • the transmission spectrum is shown as a in FIG. Further, the transmittance is shown in Table 8 in the same manner as in Example 2-1.
  • the broken line b in FIG. 12 is a transmission spectrum of the 2 mm-thick soda-lime glass plate (reference example) in which the above-mentioned film is not formed.
  • the light transmittance T of 315 nm to 400 nm is 3% or more.
  • the light transmittance T 315 nm or less at a wavelength of 315 nm or less was 60% or less.
  • the light transmittance T of the laminated glass is more than 3% and more than 315 nm and less than 400 nm.
  • the light transmittance T 315 nm or less is considered to be 60% or less.
  • Example 3-1 the wavelength selective transmission laminated glass of the present invention having a light redirecting sheet was produced by the following procedure.
  • Examples 3-1 and 3-4 are examples, and examples 3-2 and 3-3 are comparative examples.
  • the first glass plate, 1 is a diagram in which polyvinyl butyral (hereinafter referred to as PVB, thickness 0.76 mm) as an adhesive layer, a light redirecting sheet, PVB (thickness 0.76 mm) as a second adhesive layer, and a second glass plate are sequentially laminated.
  • PVB polyvinyl butyral
  • the heat-pressure bonding was performed using an autoclave to obtain a laminated glass of Example 3-1.
  • the light redirecting sheet has a visible light transmittance of 92.6%, and detects light other than light (detection angle 0 degree) detected when the light is incident perpendicularly to the sheet. A film in which light was detected in the vicinity of an angle of 20 degrees was used.
  • Example 3-1 a soda lime glass plate (made by Asahi Glass Co., Ltd., trade name: transparent float plate glass) having a thickness of 2 mm was used as the first glass plate, and benzoate was used as the first adhesive layer and the second adhesive layer.
  • a laminated glass of Example 3-2 was obtained by pressure bonding in the same manner as in Example 3-1, except that PVB (thickness 0.76 mm) containing a triazole-based ultraviolet absorber was used.
  • a laminated glass of Example 3-3 was obtained by pressure bonding in the same manner as in Example 3-1, except that the light redirecting sheet and the second adhesive layer were not used in Example 3-1.
  • Example 3-4 (Example)
  • a soda lime glass plate made by Asahi Glass Co., Ltd., trade name: transparent float plate glass
  • the wavelength selective transmission adhesive layer is used as the first adhesive layer.
  • a laminated glass of Example 3-4 is obtained by pressure bonding in the same manner as in Example 3-1, except that PVB (thickness 0.76 mm) containing 0.2% by mass of a hydroxytriazine-based ultraviolet absorber is used. It was.
  • FIG. 13 shows the transmission spectra of Examples 3-1, 3-2, 3-3 and 3-4.
  • Table 9 shows the light transmittance in each wavelength region.
  • curve a is the transmission spectrum of Example 3-1
  • curve b is the transmission spectrum of Example 3-2
  • curve c is the transmission spectrum of Example 3-3
  • curve d is the transmission spectrum of Example 3-4. Represents the spectrum.
  • Examples 3-1, 3-2, 3-3 and 3-4 the incident light is incident at an angle of 0 ° with respect to the vertical direction of the laminated glass, and the transmitted light transmitted through the laminated glass is perpendicular to the substrate.
  • the detection position is changed at an angle of 0 to ⁇ 90 °, and the transmittance value for each angle is measured.
  • the transmittance light having a wavelength of 555 nm is measured as a representative of visible light, and light having a wavelength of 380 nm is measured as a representative of the specific wavelength light.
  • FIG. 14 Example 3-1
  • FIG. 15 Example 3-2
  • FIG. 16 Example 3-3
  • Example 3-4 show the results of measuring the transmittance at different angles as light distribution characteristics. ). 14 to 17, the broken line indicates the transmittance of light having a wavelength of 555 nm, and the solid line indicates the transmittance of light having a wavelength of 380 nm.
  • the wavelength selective transmission laminated glass of Examples 3-1 and 3-4 diffuses both light with a wavelength of 555 nm and light with a wavelength of 380 nm, whereas the laminated glass of Example 3-2 diffuses light with a wavelength of 555 nm. However, it can be seen that light having a wavelength of 380 nm is not diffused. It can be seen that the laminated glass of Example 3-3 transmits light with a wavelength of 555 nm and light with a wavelength of 380 nm linearly with respect to the incident direction, but does not diffuse light in other directions.
  • Example 4-1 Example
  • a multilayer glass of the present invention was produced by the following procedure.
  • soda lime glass plate made by Asahi Glass Co., Ltd., trade name: transparent float plate glass
  • the following laminated film consisting of a total of 7 layers was formed by sputtering. This laminated film is made of a specific short wavelength light reflection component.
  • the laminated film has the following layer structure from the side close to the glass plate.
  • first AZO layer, second AZO layer, and third AZO layer the mass ratio of aluminum oxide to zinc oxide is 5:95.
  • Second Ag-containing layer first Ag layer
  • second titanium oxide layer second titanium oxide layer
  • Multilayer glass was obtained using the glass plate with a laminated film.
  • a soda-lime glass plate (made by Asahi Glass Co., Ltd., trade name: transparent float plate glass) having a thickness of 3 mm was used as the other glass of the multi-layer glass, and the space between the two glasses was opened by 12 mm, and the space between the glasses was an air layer. .
  • Example 4-2 is a multilayer glass of a comparative example having a heat ray shielding film and having no wavelength selective transmission useful for suppressing the progress of myopia.
  • Sun Balance Pure Clear (trade name), which is a multilayer glass with Low-E film manufactured by Asahi Glass Co., Ltd., was used.
  • the double-layer glass of Example 4-2 uses two 3 mm thick soda lime glass plates (product name: transparent float plate glass, manufactured by Asahi Glass Co., Ltd.), with a space of 12 mm between the two glasses, and the space between the glasses is air. Layered.
  • Example 4-3 is a comparative example that does not have both heat shielding properties and wavelength selective transparency useful for suppressing the progress of myopia.
  • two sheets of soda lime glass plate product name: transparent float plate glass manufactured by Asahi Glass Co., Ltd.
  • the space between the two glasses is opened by 12 mm
  • the space between the glasses is an air layer. It is made of glass.
  • Example 4-1 The transmission spectra of Example 4-1, Example 4-2, and Example 4-3 are shown in FIG. Table 10 shows the light transmittance in each wavelength region.
  • the multilayer glass of Example 4-1 transmits light (T 380 nm ) useful for suppressing the progress of myopia while suppressing the transmittance (T 350 nm ) of short-wavelength light harmful to the eyes. It can be seen that it has a heat shielding effect by suppressing the transmission of solar radiation and the acquisition of solar heat.
  • the double-glazed glass of Example 4-2 (Comparative Example) has a certain heat shielding effect, but has a high transmittance (T 350 nm ) of light having a short wavelength harmful to eyes.
  • the double-glazed glass of Example 4-3 (Comparative Example) has poor heat-shielding properties, and has a high light transmittance (T 350 nm ) that is harmful to the eyes.
  • Wavelength selective transmission glass article (single glass) 11 Glass plate 12 Low-E film 20 Wavelength selective transmission glass article (single plate glass) 21 Glass plate 22 Low-E film 23 Wavelength selective transmission film 30 Wavelength selective transmission glass article (laminated glass) 31, 32 Glass plate 33, 34 Adhesive layer 35 Light redirecting sheet 40 Wavelength selective transmission glass article (multi-layer glass) 41, 42 Glass plate 43 Spacer 44 Gas layer

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PCT/JP2018/019911 2017-05-30 2018-05-23 波長選択透過性ガラス物品 WO2018221359A1 (ja)

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WO2023189365A1 (ja) * 2022-03-31 2023-10-05 Hoya株式会社 近赤外線カットフィルタ

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WO2023189365A1 (ja) * 2022-03-31 2023-10-05 Hoya株式会社 近赤外線カットフィルタ

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