Central Glass Company, Limited

Naoki Mitamura

Tatsuya Tsuzuki

Naoya Hirata

Hiroki Nakamura

Tadashi Muramoto

Yu Matsuda

An automotive laminated glass includes a thermoplastic interlayer film, a curved first glass sheet, and a curved second glass sheet. The thermoplastic interlayer film is disposed between the first and second glass sheets. The first glass sheet is a 0.7- to 3-mm thick non-chemically strengthened glass sheet including a convex-side first main surface and a concave-side second main surface facing the thermoplastic interlayer film. The second glass sheet is an ion-exchanged, 0.3- to 1.5-mm thick chemically strengthened glass sheet including a convex-side third main surface facing the thermoplastic interlayer film and a concave-side fourth main surface. The second glass sheet is thinner than the first glass sheet, and is adjusted to have a curvature equal to the curvature of the first glass sheet. A compressive stress layer on the concave-side fourth main surface is thicker than a compressive stress layer on the convex-side third main surface.

Automotive laminated glass, and production method therefor

An automotive laminated glass includes a thermoplastic interlayer film, a curved first glass sheet, and a curved second glass sheet. The thermoplastic interlayer film is disposed between the first and second glass sheets. The first glass sheet is a 0.7- to 3-mm thick non-chemically strengthened glass sheet including a convex-side first main surface and a concave-side second main surface facing the thermoplastic interlayer film. The second glass sheet is an ion-exchanged, 0.3- to 1.5-mm thick chemically strengthened glass sheet including a convex-side third main surface facing the thermoplastic interlayer film and a concave-side fourth main surface. The second glass sheet is thinner than the first glass sheet. The convex-side third main surface has a compressive stress layer thicker than that on the concave-side fourth main surface, and the second glass sheet is adjusted to fit the curvature of the first glass sheet.

Disclosed is an ultraviolet and infrared absorptive glass characterized by that its coloring component contains, based on mass of the ultraviolet and infrared absorptive glass, 0.05-0.9 mass % of CeO, 0.50-1.20 mass % of of total iron oxide in terms of FeO, 0.08-0.30 mass % of FeO, 0.1-1.5 mass % of TiO, 10-25 mass ppm of CoO, and 0.1-50 mass ppm of CrO, that mass ratio (Fe/Fe) of divalent iron to trivalent iron is 0.20-0.45, and that dominant wavelength measured by using illuminant Dof JIS Z 8701 is 510-560 nm. This glass has satisfactory optical characteristics, even though the content of CeOhas been reduced.

Ultraviolet and infrared absorptive glass

The present invention aims to provide a chemically strengthened glass plate which has a good yield in a cutting process of the chemically strengthened glass plate and has sufficient strength. The chemically strengthened glass plate has a surface compressive stress of not less than 600 MPa at a surface of the chemically strengthened glass plate, and a compressive stress layer containing two types of stress patterns A and B. The stress pattern A is a stress pattern of a surface portion of the glass plate, and the stress pattern B is a stress pattern of an inside of the glass plate. The stress patterns satisfy the formula S&#x3e;Swhere Srepresents a slope of the stress pattern A and Srepresents a slope of the stress pattern B when the stress patterns A and B are each approximated by a linear function.

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Matsusaka, Japan

Naoki Mitamura