Glass composition and laminated glass

a technology of glass and laminated glass, applied in the field of glass composition and laminated glass, can solve the problems of affecting the operation of the function system by transmitting and receiving radio waves with the outside of the automobile, affecting the transmission of radio waves, and affecting the communication of portable phones

a technology of glass and laminated glass, applied in the field of glass composition and laminated glass, can solve the problems of affecting the operation of the function system by transmitting and receiving radio waves with the outside of the automobile, affecting the transmission of radio waves, and affecting the communication of portable phones

US20040067835A1Inactive Publication Date: 2004-04-08NIPPON SHEET GLASS CO LTD
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0036] The invention will be hereunder described in detail with reference to the table.

[0037] Table 1 shows glass compositions and optical characteristic values of the Examples and Comparative Examples. In the table, all concentrations are expressed in terms of % by weight.

[0038] In the manufacture of glasses, silica sand, boric acid, dolomite, limestone, strontium carbonate, barium carbonate, soda ash, salt cake, potassium carbonate, lithium carbonate, carbon, and iron oxide were compounded and mixed so as to have the proportions as shown in the table, and the resulting batch was heated and melted at 1,450.degree. C. in an electric furnace. Thereafter, the molten glass was cast on a stainless steel plate and annealed to the room temperature. The resulting glass was cut into a proper size and polished for measuring various physical properties.

[0039] The glass sheet sample having a thickness of 2.1 mm was measured for visible light transmittance (YA) using the CIE Standard illuminant...

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PUM

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Abstract

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 SiO2, 0 to 5% of B2O3, 1.9 to 2.5% of Al2O3, 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 Li2O, 13 to 17% of Na2O, 0.5 to 5% of K2O, 0 to 0.40% of TiO2 and 0.3 to 2.0% of total iron oxide in terms of Fe2O3, on a weight basis, in which the sum of MgO, CaO, SrO and BaO is from 10 to 15% and the sum of Li2O, Na2O and K2O 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.

Description

[0001] The present invention relates to a laminated glass having an excellent infrared rays (IR rays) shield performance and to a glass composition that is suitable for use in the laminated glass. More specifically, the invention relates to a laminated glass that does not use a specific interlayer or heat ray reflecting film but exhibits an infrared rays shield performance substantially equal to those having an interlayer or heat ray reflecting film and to a glass composition that is suitable for use in the laminated glass.DESCRIPTION OF THE RELATED ART[0002] In recent years, for reducing loads of air conditioning of automobiles, glazings having an infrared rays shield performance are used as automobile window shields. For example, there are thin film-provided glass sheets in which a thin film made of a metal or a metal oxide is laminated on the surface of a glass sheet. However, since such metal or metal oxide-made thin films have a conductive capacity and shield radio waves, there...

Claims

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Application Information

Patent Timeline
08 Apr 2004
Publication
US20040067835A1
IPC
B32B17/10; B60J1/00; B60R11/02; C03C3/087; C03C4/08
CPC
B32B17/10036; B32B17/10339; B32B17/10761; C03C4/082; B60R11/02; C03C3/087; B60J1/00; Y10T428/31645
Inventors
SETO, HIROMITSU; YAMAMOTO, NOBUYUKI