Nippon Sheet Glass Company, Limited

Hiromitsu Seto

Yukihito Nagashima

Shigekazu Yoshii

Koichi Sakaguchi

Isamu Kuroda

Hiroyuki Tanaka

Nobuyuki Yamamoto

Akihiro Koyama

Harunori Murakami

Shigeki Nakagaki

Kosuke Fujiwara

Nbuyuki Yamamoto

Daisuke Miyabe

The present invention relates to an ultraviolet-shielding glass sheet including a glass composition based on soda-lime glass, the glass composition containing iron oxide and TiOas coloring components. The glass sheet has a thickness of 1 to 5 mm, and an ultraviolet transmittance (Tuv 380) as determined at the thickness according to ISO 9050:1990 is 1.5% or less.

Glass composition, glass sheet, and vehicle window including glass sheet

The present invention provides a glass sheet having a good property of blocking transmission of ultraviolet light, having a low to moderate visible transmittance, being relatively thin, being capable of substantially blocking transmission of solar ultraviolet light, and also having a good solar shielding property. The glass sheet of the present invention has a thickness of 1 to 5 mm, a Tuv 380 of 1.5% or less, a Tuv 400 of 2.5% or less, a visible transmittance (YA) of 5 to 40%, and a solar transmittance (TG) of 5 to 45%, and is formed from a glass composition, wherein the glass composition includes: 1.0 to 5.0 wt % T-FeO; 1.0 to 5.0 wt % TiO; and 50 to 600 wt. ppm CoO as coloring components in addition to predetermined base composition, a FeO ratio is 5 to 40%, and the sum of T-FeOmultiplied by 2 and TiOis 7.0% or more.

Ultraviolet-shielding glass sheet and vehicle window pane using the glass sheet

The glass substrate of the present invention includes, in terms of mass %: 58.5-69.5% SiO, 2.5-9.9% AlO, 0-2.5% LiO, 0%&#x2266;NaO&#x3c;6%, 0%&#x2266;KO&#x3c;6%, 0% &#x3c;MgO&#x2266;5.2%, 3%&#x3c;CaO&#x2266;13%, 10-27% SrO, 0%&#x2266;BaO&#x3c;5%, 0-3% TiO, and 0-9.8% ZrO. SiO+AlO&#x2266;73%, LiO+NaO+KO&#x3c;6%, 3%&#x3c;MgO+CaO&#x2266;16%, SrO+BaO 10-27%, MgO+CaO+SrO+BaO 21-33%, and MgO/CaO 0.2-1.0 in molar fraction. The glass substrate is substantially free from BO. Glass transition point &#x3e;555&#xb0; C., liquidus temperature &#x2266;1200&#xb0; C., and average thermal expansion coefficient &#x2266;75&#xd7;10/&#xb0; C. The present invention can provide a glass substrate having a thermal expansion coefficient close to those of a semi conductor film, etc. and a high strain point, and suitable for continuous production by a float process.

Glass substrate

The present invention provides a glass article using a glass composition including a base glass composition and colorants. The base glass composition includes, expressed in mass %: 65 to 80% of SiO; 0 to 5% of AlO; 0 to 10% of MgO; 0 to 15% of CaO; 5 to 15% of MgO+CaO; 10 to 18% of NaO; 0 to 5% of KO; 10 to 20% of NaO+KO; and 0 to 5% of BO, and the colorants consist essentially of, expressed in mass %: 0.6% to 1.0% of T-FeO; 0.026 to 0.8% of TiO; 0 to 2.0% of CeO; 0.01 to 0.03% of CoO; 0 to 0.0008% of Se; and 0.06 to 0.20% of NiO. The glass article has a grayish color tone, and has a visible light transmittance in a range of 15% to 40%, which is measured with the illuminant A at a thickness of 3.1 mm.

Glass article and method of producing the same

The present invention provides a near-infrared absorbent green glass composition which contains basic glass components and 0.6 to 1.3% total iron oxide amount in terms of FeO(T-FeO), 0 to 2.0% CeOand, 300 ppm or less MnO expressed in units of mass and wherein a mass ratio (FeO ratio) of FeO converted into FeOrelative to the T-FeOis from 0.21 to 0.35. Further the glass composition satisfies at least one of the following a) and b): a) when the glass composition is formed to have a thickness in the range of 1.3 to 2.4 mm, a visible light transmittance is at least 80%, a total solar energy transmittance is 62% or less, a dominant wavelength is from 500 to 540 nm, and an integrated value obtained by integrating transmittance of every 1 nm in the wavelength from 1100 to 2200 nm is 62000 or less;b) when the glass composition is formed to have a thickness in the range of 3 to 5 mm, a visible light transmittance is at least 70%, a total solar energy transmittance is 45% or less, a dominant wavelength is from 495 to 540 nm, and an integrated value obtained as above is 62000 or less.

Near infrared absorbent green glass composition, and laminated glass using the same

A laminated glass having a low haze ratio and an excellent infrared rays shield performance and a glass composition suitable for use in a laminated glass and easy with respect to melting and molding works, which is a glass composition comprising 65 to 74% of SiO, 0 to 5% of BO, 1.9 to 2.5% of AlO, 1.0 to 3.0% of MgO, 5 to 10% of CaO, 0 to 10% of SrO, 0 to 10% of BaO, 0 to 5% of LiO, 13 to 17% of NaO, 0.5 to 5% of KO, 0 to 0.40% of TiOand 0.3 to 2.0% of total iron oxide in terms of FeO, on a weight basis, in which the sum of MgO, CaO, SrO and BaO is from 10 to 15% and the sum of LiO, NaO and KO is from 14 to 20%, wherein the glass composition has a visible light transmittance of 80% or more as measured with the CIE Standard illuminant A and a total solar energy transmittance of not more than 62% at a thickness of 2.1 mm, and a laminated glass using a glass sheet made of that glass composition.

Glass composition and laminated glass

An ultraviolet/infrared absorbent low transmittance glass is formed of base glass containing 65 to 80 wt. % SiO; 0 to 5 wt. % AlO; greater than 2.1 to less than or equal to 10 wt. % MgO; 5 to 15 wt. % CaO wherein a total amount of MgO and CaO is 7 to 15 wt. %; 10 to 18 wt. % NaO; 0 to 5 wt. % KO wherein a total amount of NaO and KO is 10 to 20 wt. %; and 0 to 5 wt. % BO, and colorants including 1.25 to 2.2 wt. % total iron oxide (T-FeO) expressed as FeO; 0.001 to 0.018 wt. % CoO; 0 to 0.0004 wt. % Se; and 0.028 to 0.2 wt. % NiO, wherein the glass has a turquoise blue or deep green color.

Ultraviolet/infrared absorbent low transmittance glass

A glass composition having excellent reinforcing capability and excellent solar control performance includes not smaller than 65 wt. % and smaller than 74 wt. % SiO, 0-5 wt. % BO, 0.1-2.5 wt. % AlO, not smaller than 0 wt. % and smaller than 2 wt. % MgO, 5-15 wt. % CaO, 0-10 wt. % SrO, 0-10 wt. % BaO wherein a total amount of MgO, CaO, SrO and BaO is greater than 10 wt. % and not greater than 15 wt. %, 0-5 wt. % LiO, 10-18 wt. % NaO, 0-5 wt. % KO wherein a total amount of LiO, NaO, and KO is 10-20 wt. % and 0-0.40 TiO.

Glass composition

A glass has greenish color shade, a medium visible light transmittance, a low solar energy transmittance, and a low ultraviolet transmittance, and is suitable for a rear window of a vehicle arranged next to an ultraviolet/infrared absorbent glass with high light transmittance. The glass is formed of a base glass including 65 to 80 wt. % SiO, 0 to 5 wt. %, AlO; 2 to 10 wt. % MgO, 5 to 15 wt. % CaO wherein a total amount of MgO and CaO is 7 to 15 wt. % (excluding 7 wt. %), 10 to 18 wt. % NaO, 0 to 5 wt. % KO wherein a total amount of NaO and KO is 10 to 20 wt. %, and 0 to 5 wt. % BO; and colorants including 1.0 to 1.35 wt. % total iron oxide as FeO, 0.001 to 0.05 wt. % NiO, and 0 to 0.006 wt. % CoO (excluding 0.006 wt. %).

Ultraviolet/infrared absorbent green glass with medium light transmittance

The ultraviolet/infrared absorbent low transmittance glass has a grayish green color shade, low visible light transmittance, low total solar energy transmittance, and low ultraviolet transmittance, and is suitable for a rear window of a vehicle and capable of protecting privacy. The glass is formed of a base glass including: 65 to 80 wt. % SiO ; 0 to 5 wt. % Al O ; 0 to 10 wt. % MgO; 5 to 15 wt. % CaO, wherein a total amount of MgO and CaO is between 5 and 15 wt. %; 10 to 18 wt. % Na O; 0 to 5 wt. % K O, wherein a total amount of Na O and K O is between 10 and 20 wt. %; and 0 to 5 wt. % B O , and colorants including: more than 0.95 wt. % and less than 1.2 wt. % total iron oxide (T-Fe O ) expressed as Fe O ; 0.001 to 0.0180 wt. % CoO; and 0.003 to 0.2 wt. % NiO.

The ultraviolet/infrared absorbent low transmittance glass consists of base glass including: 65 to 80 wt. % SiO ; 0 to 5 wt. % Al O ; 0 to 10 wt. % MgO; 5 to 15 wt. % CaO (a total amount of MgO and CaO is between 5 to 15 wt. %); 10 to 18 wt. % Na O; 0 to 5 wt. % K O (a total amount of Na O and K O is between 10 to 20 wt. %); and 0 to 5 wt. % B O ; and colorants including: 1.2 to 2.2 wt. % total iron oxide (T-Fe O ) expressed as Fe O ; greater than 0.03 wt. % CoO; less than 0.0001 wt. % Se; and 0 to 0.2 wt. % NiO. The glass has a visible light transmittance measured by the illuminant A of not greater than 12% in case that the glass has a thickness of 4 mm. The glass has almost neutral color such as bluish green shade or deep green shade, low visible light transmittance, low solar energy transmittance and low ultraviolet transmittance, so that it is useful for windows of vehicles or buildings particularly for thickness and weight reduction of a privacy preventing glass.

Ultraviolet/infrared absorbent green glass is composed of soda-lime-silica glass including 0.001 to 2 wt. % Li O and, as colorant, 0.4 to 2 wt. % total iron oxide expressed as Fe O (T-Fe O ) wherein FeO expressed as Fe O is 15 to 60% of T-Fe O . The glass has visible light transmittance (YA) of not less than 70%, measured by using the CIE illuminant A, and total solar radiation transmittance (TG) of not greater than 60%, when the glass has a thickness between 2.1 mm and 6 mm.

Ultraviolet/infrared absorbent green glass

An ultraviolet and infrared radiation absorbing green glass comprises: in % by weight, as coloring components, 0.5 to 1.1%, excluding 0.5%, total iron oxide in terms of Fe O ; 0 to 2.0% CeO , 0 to 1.0% TiO ; 0.0005 to 0.01% NiO; and 0.0001 to 0.001% CoO; wherein, when the glass has a thickness of 4 mm, the glass has a visible light transmittance of 70% or more, a total solar energy transmittance of 60% or less, and an ultraviolet transmittance defined by ISO 9050 of 25% or less.

Ultraviolet and infrared radiation absorbing green glass

A method for shifting the absorption peak wavelength in the wavelength range 900-1600 nm of an infrared radiation absorbing glass from less than 1100 nm to 1100 nm or longer without substantially changing the tint of the glass, comprising the step of irradiating with ultraviolet light of 400 nm or shorter at an energy density of 1.0&times;10 J/m /hr or more to increase the content of FeO in the irradiated glass by reducing Fe (III) to Fe (II), the ultraviolet light irradiated glass thereby comprising 0.02 wt. % or more FeO in terms of Fe O . The glass to be irradiated comprises, in % by weight: 65 to 80% SiO , 0 to 5% Al O , 0 to 10% MgO, 5 to 15% CaO, 10 to 18% Na O, 0 to 5% K O, 5 to 15% MgO&plus;CaO, 10 to 20% Na O&plus;K O, and 0 to 5% B O ; 0.02% or more total iron oxide (T-Fe O ) in terms of Fe O , 0 to 2.0% CeO , 0 to 1.0% TiO , 0 to 0.005% CoO, and 0 to 0.005% Se.

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Osaka, Japan

Hiromitsu Seto