Strengthened laminated glass structures

Patent metadata

Field	Value
Publication number	US-10131118-B2
Application number	US-201414759354-A
Country	US
Kind code	B2
Filing date	Jan 6, 2014
Priority date	Jan 7, 2013
Publication date	Nov 20, 2018
Grant date	Nov 20, 2018

Abstract

A laminated glass structure comprising a non-glass substrate and a glass sheet bonded to the non-glass substrate to form the laminated glass structure, wherein the laminated glass structure withstands a ball drop test wherein a 535 g stainless steel ball is dropped from a height of 0.8 m onto the laminated glass structure, with the glass sheet being impacted by the ball. The glass sheet has a thickness such that the glass sheet exhibits, without cracking, deformation to adapt to any shape change of the non-glass substrate as imparted by the ball of the ball drop test.

First claim

What is claimed is:

1. A laminated glass structure comprising:
a non-glass substrate having a thickness of from 0.1 mm to 5 mm; and
a glass sheet bonded to the non-glass substrate while the non-glass substrate is thermally expanded relative to the glass sheet and then controllably cooled to form the laminated glass structure, wherein the laminated glass structure withstands a ball drop test wherein a 535 g stainless steel ball is dropped from a height of 0.8 m onto the laminated glass structure, with the glass sheet being impacted by the ball;
wherein the glass sheet has a thickness such that the glass sheet exhibits, without cracking, deformation to adapt to any shape change of the non-glass substrate as imparted by the ball of the ball drop test;
wherein the glass sheet comprises a compressive stress of at least about 30 MPa across a thickness of the glass sheet due to a coefficient of thermal expansion (CTE) mismatch between the non-glass substrate and the glass sheet, the CTE of the non-glass substrate being more than two times a CTE of the glass sheet.

2. The laminated glass structure of claim 1 , wherein the glass sheet has a thickness of 300 μm or less.

3. The laminated glass structure of claim 1 , wherein the non-glass substrate is composed of a metal or metal alloy.

4. The laminated glass structure of claim 1 , wherein the glass sheet has a first CTE that is greater than or equal to about 2 ppm/C and less than or equal to about 5 ppm/C and the non-glass substrate has a second CTE greater than or equal to about 10 ppm/C.

5. A laminated glass structure comprising:
a glass sheet having a thickness of no more than about 300 μm; and
a metal substrate having a thickness of no more than 5 mm laminated to a surface of the glass sheet while the metal substrate is thermally expanded relative to the glass sheet and then controllably cooled, so as to achieve a compressive stress of at least about 30 MPa across the thickness of the glass sheet due to a coefficient of thermal expansion (CTE) mismatch between the glass sheet and the metal substrate, the CTE of the metal substrate being more than two times a CTE of the glass sheet.

6. The laminated glass structure of claim 1 or claim 5 , further comprising a layer of adhesive positioned between and in contact with the glass sheet and the substrate, the layer of adhesive cured while the non-glass or metal substrate is thermally expanded.

7. The laminated glass structure of claim 6 , wherein the layer of adhesive has a thickness of no more than about 1000 μm.

8. The laminated glass structure of claim 1 or claim 5 , wherein the substrate has a thickness of no more than about 5 mm.

9. The laminated glass structure of claim 1 or claim 4 , wherein the substrate has a Young's Modulus greater than or equal to about 30,000 MPa and less than or equal to about 500,000 MPa.

10. The laminated glass structure of claim 1 or claim 5 , comprising at least three layers including a first glass sheet layer, a second glass sheet layer, and the non-glass or metal substrate layer located between the first and second glass sheet layers.

11. The laminated glass structure of claim 1 or claim 5 , wherein the non-glass or metal substrate comprises one or more of stainless steel, aluminum, nickel, brass, bronze, titanium, tungsten, copper, cast iron and noble metals.

12. The laminated glass structure of claim 6 , wherein no air bubbles within the adhesive layer have a diameter of greater than or equal to 100 microns.

Assignees

• Corning Inc
• Kang Kiat Chyai
• Lewis Sue Camille
• Natarajan Govindarajan
• Xiao Yu
• Zhang Chunhe

Inventors

• Kang Kiat Chyai
• Lewis Sue Camille
• Natarajan Govindarajan
• Xiao Yu
• Zhang Chunhe

Classifications

• B32B17/061 Primary

  of metal · CPC title

• Y10T428/266

  of base or substrate · CPC title

• B32B15/20

  comprising aluminium or copper {(B32B15/016 and B32B15/017 take precedence)} · CPC title

• B32B7/10

  at least one layer having inter-reactive properties · CPC title

• B32B15/18

  comprising iron or steel {(B32B15/011, B32B15/012 and B32B15/013 take precedence)} · CPC title