Multiple glazing for building window

Patent metadata

Field	Value
Publication number	US-2016017654-A1
Application number	US-201514870577-A
Country	US
Kind code	A1
Filing date	Sep 30, 2015
Priority date	Apr 3, 2013
Publication date	Jan 21, 2016
Grant date	—

Abstract

To provide multiple glazing for a building window, which is thin in thickness and light in weight and which is capable of suppressing scattering of fragments as much as possible when broken.
In multiple glazing 10 for a building window, a glass sheet 20 arranged on the indoor side has first and second main surfaces 21 a , 21 b , and an edge 22 , and has a surface compression stress formed at the main surfaces 21 a , 21 b by chemical tempering and has a tensile stress formed inside. The glass sheet 20 has a sheet thickness of from 1.0 to 2.5 mm; the value of the surface compression stress is from 400 to 900 MPa; the value of the tensile stress is from 1 to 25 MPa; and the thickness in the sheet thickness direction of the compression stress layer at the main surfaces 21 a , 21 b is from 7 to 25 μm.

First claim

What is claimed is:

1 . Multiple glazing for a building window, comprising a plurality of glass sheets and a spacer is placed for the periphery edges of the plurality of glass sheets to form an air space between adjacent glass sheets, wherein among the plurality of glass sheets, a glass sheet arranged on the indoor side has first and second main surfaces and an edge present between the first and second main surfaces, and is a glass sheet having a surface compression stress formed at both of the main surfaces by chemical tempering and having a tensile stress formed inside; said glass sheet has a sheet thickness of from 1.0 to 2.5 mm; the value of said surface compression stress formed at both of the main surfaces is from 400 to 900 MPa; the value of said tensile stress is from 1 to 25 MPa; and the thickness in the sheet thickness direction of the compression stress layer at both of the main surfaces is from 7 to 25 μm.

2 . The multiple glazing for a building window according to claim 1 , wherein the thickness of the glass sheet arranged on the indoor side is from 1.2 to 2.2 mm; the value of said surface compression stress is from 600 to 850 MPa; the value of said tensile stress is from 4 to 20 MPa; and the thickness in the sheet thickness direction of the compression stress layer at the main surfaces is from 15 to 25 μm.

3 . The multiple glazing for a building window according to claim 1 , wherein when the multiple glazing for a building window is subjected to a pendulum impact test in accordance with JIS R3206 from the side of said glass sheet arranged on the indoor side, it does not break at a drop height of 10 cm, and when it breaks at a drop height of at least 20 cm, the scattering distance of a fragment exceeding 0.15 g is at most 4.5 m.

4 . The multiple glazing for a building window according to claim 1 , wherein the area of each main surface is at least 5,000 cm 2 .

5 . The multiple glazing for a building window according to claim 1 , wherein said glass sheet arranged on the indoor side is made of glass comprising, as represented by mol percentage based on the following oxides, from 56 to 75% of SiO 2 , from 1 to 20% of Al 2 O 3 , from 8 to 22% of Na 2 O, from 0 to 10% of K 2 O, from 0 to 14% of MgO, from 0 to 5% of ZrO 2 , and from 0 to 10% of CaO.

6 . The multiple glazing for a building window according to claim 1 , wherein said glass sheet arranged on the indoor side is made of glass comprising, as represented by mol percentage based on the following oxides, from 56 to 75% of SiO 2 , from 5 to 20% of Al 2 O 3 , from 8 to 22% of Na 2 O, from 0 to 10% of K 2 O, from 0 to 14% of MgO, from 0 to 5% of ZrO 2 , and from 0 to 5% of CaO.

7 . The multiple glazing for a building window according to claim 1 , wherein the thickness of the air space is from 6 to 16 mm.

8 . Multiple glazing for a building window, comprising first, second and third glass sheets, and first and second spacers is placed for the periphery edges of the respective glass sheets to form a first air space between the first and second glass sheets, and a second air space between the second and third glass sheets, wherein the first glass sheet arranged on the indoor side has first and second main surfaces and an edge present between the first and second main surfaces, and is a glass sheet having a surface compression stress formed at both of the main surfaces by chemical tempering and having a tensile stress formed inside; said glass sheet has a sheet thickness of from 1.0 to 2.5 mm; the value of said surface compression stress formed at both of the main surfaces is from 400 to 900 MPa; the value of said tensile stress is from 1 to 25 MPa; and the thickness in the sheet thickness direction of the compression stress layer at both of the main surfaces is from 7 to 25 μm.

9 . The multiple glazing for a building window according to claim 8 , wherein the thickness of the first air space and the thickness of the second air space are from 6 to 16 mm.

10 . The multiple glazing for a building window according to claim 9 , wherein the thickness of the first air space and the thickness of the second air space are different.

11 . The multiple glazing for a building window according to claims 8 , wherein the sheet thickness of the glass sheet arranged on the indoor side is from 1.2 to 2.2 mm; the value of said surface compression stress is from 600 to 850 MPa; the value of said tensile stress is from 4 to 20 MPa; and the thickness in the sheet thickness direction of the compression stress layer at the main surfaces is from 15 to 25 μm.

12 . The multiple glazing for a building window according to claim 8 , wherein when the multiple glazing for a building window is subjected to a pendulum impact test in accordance with JIS R3206 from the side of said glass sheet arranged on the indoor side, it does not break at a drop height of 10 cm, and when it breaks at a drop height of at least 20 cm, the scattering distance of a fragment exceeding 0.15 g is at most 4.5 m.

13 . The multiple glazing for a building window according to claim 8 , wherein the area of each main surface is at least 5,000 cm 2 .

14 . The multiple glazing for a building window according to claim 8 , wherein the first glass sheet arranged on the indoor side is made of glass comprising, as represented by mol percentage based on the following oxides, from 56 to 75% of SiO 2 , from 1 to 20% of Al 2 O 3 , from 8 to 22% of Na 2 O, from 0 to 10% of K 2 O, from 0 to 14% of MgO, from 0 to 5% of ZrO 2 , and from 0 to 10% of CaO.

15 . The multiple glazing for a building window according to claim 8 , wherein the first glass sheet arranged on the indoor side is made of glass comprising, as represented by mol percentage based on the following oxides, from 56 to 75% of SiO 2 , from 5 to 20% of Al 2 O 3 , from 8 to 22% of Na 2 O, from 0 to 10% of K 2 O, from 0 to 14% of MgO, from 0 to 5% of ZrO 2 , and from 0 to 5% of CaO.

Assignees

• Asahi Glass Co Ltd

Inventors

• Kikuchi Satoshi
• Kojima Hiroshi
• Ichiyama Yasuko
• Ishida Hikaru

Classifications

• C03C27/10

  with the aid of adhesive specially adapted for that purpose · CPC title

• E06B3/67391

  Apparatus travelling around the periphery of the pane or the unit · CPC title

• E06B3/6775 Primary

  Evacuating or filling the gap during assembly · CPC title

• E06B3/66304

  Discrete spacing elements, e.g. for evacuated glazing units · CPC title

• E06B3/67326

  Assembling spacer elements with the panes · CPC title