LAMINATED GLASS STRUCTURES WITH BOW RESISTANCE

• US 20190160789A1
• Filed: 05/02/2017
• Published: 05/30/2019
• Est. Priority Date: 05/02/2016
• Status: Active Application

• Current Assignee: Corning Incorporated
• Original Assignee: Corning Incorporated
• Inventors: Mattos Jr., Louis, Price, Michael William, Webb, James Ernest
• Application Number:
  US16/098,301
• Publication Number:
  US 20190160789A1
• Time in Patent Office: Days
• CPC Class Codes: B32B 15/12 of paper or cardboard
• CPC Class Codes: B32B 15/20 comprising aluminium or copper B32B15/016 and B32B15/017 take precedence
• CPC Class Codes: B32B 17/062 of wood
• CPC Class Codes: B32B 17/065 of paper or cardboard
• CPC Class Codes: B32B 2260/028 Paper layer
• CPC Class Codes: B32B 2260/046 Synthetic resin
• CPC Class Codes: B32B 2307/546 Flexural strength; Flexion stiffness
• CPC Class Codes: B32B 2307/7246 Water vapor barrier
• CPC Class Codes: B32B 2451/00 Decorative or ornamental articles wall paper B32B2607/02
• CPC Class Codes: B32B 29/005 next to another layer of paper or cardboard layer
• CPC Class Codes: B32B 7/12 using interposed adhesives or interposed materials with bonding properties
• CPC Class Codes: B44C 5/0407 containing glass elements
• CPC Class Codes: B44F 1/066 comprising at least two transparent elements, e.g. sheets, layers layered products of glass and synthetic resin containing decorations or patterns B32B17/10247; window units comprising two or more parallel glass panes E06B3/66

Abstract

A laminated glass structure is provided that includes a non-glass substrate, a flexible glass sheet, and an adhesive. The non-glass substrate includes one or more layers of polymer-impregnated paper, an upper primary surface and a lower primary surface. The non-glass substrate also comprises a lower moisture barrier at a selected depth from the lower primary surface. The flexible glass sheet has a thickness of no greater than 0.3 mm and is laminated to the upper primary surface of the non-glass substrate with the adhesive. An optional upper moisture barrier can also be included within the non-glass substrate at a selected depth from the upper primary surface.

Claims

1. A laminated glass structure, comprising:

a non-glass substrate comprising one or more layers of polymer-impregnated paper, an upper primary surface and a lower primary surface; and

a flexible glass sheet having a thickness of no greater than 0.3 mm laminated to the upper primary surface of the non-glass substrate with an adhesive,

wherein the non-glass substrate comprises a lower moisture barrier at a selected depth from the lower primary surface.

2. The structure according to claim 1, wherein the structure exhibits a change in bow of no more than ±

10 mm upon exposure to a drying evolution at 70°

C. for 24 hours.

3. The structure according to claim 1, wherein the structure exhibits a change in bow of no more than ±

10 mm upon exposure to a high humidity evolution at 23°

C. with a 90% relative humidity for 7 days.

4. The structure according to claim 1, wherein the structure exhibits a change in bow of no more than ±

10 mm upon exposure to a high humidity and temperature evolution at 40°

C. with a 95% relative humidity for 96 hours.

5. The structure according to claim 1, wherein the lower moisture barrier comprises an aluminum foil having a thickness from about 20 to about 60 microns.

6. The structure according to claim 1, wherein:

the lower moisture barrier has a thickness from about 20 to about 60 microns;

the lower moisture barrier comprises a material selected from the group consisting of a glass, a polymer, a metal, a ceramic, and a combination thereof; and

the lower moisture barrier exhibits a moisture diffusivity of no more than 10,000 times the moisture diffusivity of the flexible glass sheet at 45°

C.

7. The structure according to claim 1, wherein the non-glass substrate further comprises a plurality of polymer-impregnated papers.

8. The structure according to claim 1, wherein a total thickness of the non-glass substrate, the flexible glass sheet and the adhesive is from about 4 mm to about 25 mm.

10. The structure according to claim 1, wherein the non-glass substrate further comprises an upper portion in proximity to the upper primary surface and a lower portion in proximity to the lower primary surface, and the lower portion exhibits lower moisture diffusivity than the moisture diffusivity of the upper portion.

11. The structure according to claim 1, wherein the non-glass substrate comprises an upper moisture barrier at a selected depth from the upper primary surface.

12. The structure according to claim 11, wherein each of the upper moisture barrier and the lower moisture barrier comprises an aluminum foil having a thickness from about 20 to about 60 microns.

13. The structure according to claim 11, wherein:

each of the upper moisture barrier and the lower moisture barrier has a thickness from about 20 to about 60 microns;

each of the upper moisture barrier and the lower moisture barrier comprises a material selected from the group consisting of a glass, a polymer, a metal, a ceramic, and a combination thereof; and

each of the upper moisture barrier and lower moisture barrier exhibits a moisture diffusivity of no more than 10,000 times the moisture diffusivity of the flexible glass sheet at 45°

C.

14. A laminated glass structure, comprising:

a non-glass substrate comprising a high pressure laminate (HPL), an upper primary surface and a lower primary surface; and

a flexible glass sheet having a thickness of no greater than 0.3 mm laminated to the upper primary surface of the non-glass substrate with an adhesive,

wherein the non-glass substrate comprises a lower moisture barrier at a selected depth from the lower primary surface, the moisture barrier having a thickness from about 20 microns to about 60 microns,

wherein a total thickness of the non-glass substrate, the flexible glass sheet and the adhesive is from about 4 mm to about 25 mm, and

further wherein the structure exhibits a change in bow of no more than ±

10 mm upon exposure to (a) a drying evolution at 70°

C. for 24 hours;

(b) a high humidity evolution at 23°

C. with a 90% relative humidity for 7 days; and

(c) a high humidity and temperature evolution at 40°

C. with a 95% relative humidity for 96 hours.

9. The structure according to claim 14, wherein the upper and lower primary surfaces each comprise a melamine-impregnated decorative layer.

15. The structure according to claim 14, wherein the lower moisture barrier comprises an aluminum foil.

16. The structure according to claim 14, wherein:

the lower moisture barrier comprises a material selected from the group consisting of a glass, a polymer, a metal, a ceramic, and a combination thereof; and

the lower moisture barrier exhibits a moisture diffusivity of no more than 110% of the moisture diffusivity of the flexible glass sheet between 23°

C. and 70°

C.

17. The structure according to claim 14, wherein each of the upper primary surface and the lower primary surface comprises a melamine-impregnated decorative layer.

18. The structure according to claim 14, wherein the non-glass substrate further comprises an upper portion in proximity to the upper primary surface and a lower portion in proximity to the lower primary surface, and the lower portion exhibits lower moisture diffusivity than the moisture diffusivity of the upper portion.