LAMINATED GLASS
The present invention relates to a laminated glass including a first glass plate, a second glass plate and an intermediate layer provided between the first glass plate and the second glass plate, in which the first glass plate has a first face and a second face opposing the first face, the second glass plate has a third face and a fourth face opposing the third face, the intermediate layer is provided between the second face and the third face, the second glass plate is a chemically-strengthened glass, and in the second glass plate, when a compressive stress on the third face is denoted as CS (3) , a tensile stress generated in an interior of the second glass plate is denoted as CT, a thickness of the second glass plate is denoted as t, a depth of the compressive stress on a side of the third face is denoted as DOL (3) and a depth of a compressive stress on a side of the fourth face is denoted as DOL (4) , CS (3) /[CT 2 ×{t−(DOL (3) +DOL (4) )}] is greater than 1.1 MPa −1 ×mm −1 .
1 . A laminated glass comprising a first glass plate, a second glass plate and an intermediate layer provided between the first glass plate and the second glass plate,
wherein the first glass plate has a first face and a second face opposing the first face,
the second glass plate has a third face and a fourth face opposing the third face,
the intermediate layer is provided between the second face and the third face,
the second glass plate is a chemically-strengthened glass, and
in the second glass plate, when a compressive stress on the third face is denoted as CS (3) , a tensile stress generated in an interior of the second glass plate is denoted as CT, a thickness of the second glass plate is denoted as t, a depth of the compressive stress on a side of the third face is denoted as DOL (3) and a depth of a compressive stress on a side of the fourth face is denoted as DOL (4) , CS (3) /[CT 2 ×{t−(DOL (3) +DOL (4) )}] is greater than 1.1 MPa −1 ×mm −1 .
2 . The laminated glass according to claim 1 , wherein the CS (3) /[CT 2 ×{t−(DOL (3) +DOL (4) )}] of the second glass plate is greater than 1.6 MPa −1 ×mm −1 .
3 . The laminated glass according to claim 1 , wherein the CS (3) /[CT 2 ×{t−(DOL (3) +DOL (4) )}] of the second glass plate is greater than 2.1 MPa −1 ×mm −1 .
4 . The laminated glass according to claim 1 , wherein the CS (3) of the second glass plate is 300 MPa or greater.
5 . The laminated glass according to claim 1 , wherein the CT of the second glass plate is 50 MPa or smaller.
6 . The laminated glass according to claim 1 , wherein the DOL (4) of the second glass plate is 2 μm or greater.
7 . The laminated glass according to claim 1 , wherein the DOL (4) of the second glass plate is 5 μm or greater.
8 . The laminated glass according to claim 1 , wherein the DOL (3) of the second glass plate is smaller than 40 μm.
9 . The laminated glass according to claim 1 , wherein the DOL (3) of the second glass plate is smaller than 20 μm.
10 . The laminated glass according to claim 1 , wherein the thickness of the second glass plate is smaller than a thickness of the first glass plate.
11 . The laminated glass according to claim 1 , wherein the thickness of the second glass plate is from 0.2 mm to 1.0 mm.
12 . The laminated glass according to claim 1 , wherein the thickness of the first glass plate is from 1.5 mm to 4.0 mm.
13 . The laminated glass according to claim 1 , wherein a value obtained by dividing the thickness of the second glass plate by the thickness of the first glass plate is from 0.1 to 0.5.
14 . The laminated glass according to claim 1 , wherein the laminated glass is a windowpane,
the first glass plate is provided on a side exposed to an outside, and
the second glass plate is provided on an indoor side.
15 . The laminated glass according to claim 1 , wherein the second glass plate is bonded to the first glass plate via the intermediate layer in a state where the second glass plate is elastically deformed along a shape of the first glass plate.