Tempered glass sheet
AssigneeAsahi Glass Company, Limited
InventorsYasumasa Kato, Kazushige Yoda, Jiro Nishihama
Life of this patent
Estimating the term…
Abstract
To provide a tempered glass sheet having a thickness of from 1.8 to less than 2.5 mm, which is capable of satisfying the fragmentation quality and impact strength quality required for windowpanes for automobiles. A tempered glass sheet having a first surface, a second surface opposed to the first surface and a side surface connecting the first and second surfaces, and having a thickness of from 1.8 to less than 2.5 mm, wherein at the first surface, the average value of the surface compressive stress is within a range of from 100 to 160 MPa, and the average value of the surface strength is within a range of from 220 to 400 MPa.
Claims20
An air-quenched tempered glass sheet having a first surface, a second surface opposed to the first surface and a side surface connecting the first and second surfaces, and having a thickness of from 1.8 to less than 2.5 mm,
- wherein the average value of the surface compressive stress at the first surface is within a range of from 100 to 160 MPa,
- the average value of the surface strength at the first surface is within a range of from 220 to 400 MPa,
- the Weibull distribution of the surface strength at the first surface is at least 7.5,
- the average value of the surface compressive stress at the second surface is at least the average value of the surface compressive stress at the first surface, and
- the average value of the surface strength at the second surface is at least the average value of the surface strength at the first surface.
Dependencies are inferred from the claim text.