Laminated glazing for vehicles, particularly motor vehicles

Patent metadata

Field	Value
Publication number	US-11890834-B2
Application number	US-202118252635-A
Country	US
Kind code	B2
Filing date	Nov 9, 2021
Priority date	Nov 12, 2020
Publication date	Feb 6, 2024
Grant date	Feb 6, 2024

Abstract

A laminated glazing for a vehicle, in particular a motor vehicle, includes an exterior glass sheet adhesively bonded to an interior glass sheet by a lamination interlayer, wherein the exterior glass sheet carries a layer of a first enamel, of black color, on the periphery of its face in contact with the lamination interlayer, known as face 2 , and the interior glass sheet carries on its face in contact with the lamination interlayer, known as face 3 , a layer of a second enamel forming a marking and having a color other than black, located opposite the layer of the first enamel, the laminated glazing further including a polymeric seal on the face of the interior glass sheet, called face 4 , opposite face 3 , the seal concealing the marking.

First claim

The invention claimed is:

1. A laminated glazing for a vehicle, comprising an exterior glass sheet adhesively bonded to an interior glass sheet by means of a lamination interlayer, wherein the exterior glass sheet includes a first face and carries a layer of a first enamel, of black color, on a periphery of a second face in contact with the lamination interlayer, the second face being opposite the first face, and the interior glass sheet carries on a third face in contact with the lamination interlayer, a layer of a second enamel forming a marking and having a color other than black, located opposite the layer of the first enamel, said laminated glazing further comprising a polymeric seal on a fourth face of the interior glass sheet, which is opposite the third face, said polymeric seal concealing said marking.

2. The laminated glazing according to claim 1 , wherein the marking comprises at least one line or a plurality of patterns, located at a periphery of the interior glass sheet.

3. The laminated glazing according to claim 1 , wherein the marking is adapted to form a reference point for the deposition of the polymeric seal on the fourth face.

4. The laminated glazing according to claim 1 , wherein the first enamel has a colorimetric coordinate L* in reflection on the glass side lower than 10.

5. The laminated glazing according to claim 1 , wherein the second enamel is white in color.

6. The laminated glazing according to claim 1 , wherein the layer of second enamel coats between 0.05% and 5% of the third face of the interior glass sheet.

7. The laminated glazing according to claim 1 , wherein the first and second enamels comprise a bismuth borosilicate-based glass or glass-crystalline binder.

8. The laminated glazing according to claim 7 , wherein the first and second enamels comprise a same glass or glass-crystalline binder.

9. The laminated glazing according to claim 1 , wherein a low-emissive or solar control coating is disposed on the third face, under the layer of the second enamel.

10. The laminated glazing according to claim 1 , wherein the polymeric seal is in the form of a bead deposited on at least part of the periphery of the glazing.

11. The laminated glazing according to claim 1 , wherein the polymeric seal is polyurethane-based.

12. The laminated glazing according to claim 1 , which is a windshield, a roof, a rear window, or a side window, of the vehicle.

13. The laminated glazing according to claim 1 , wherein the vehicle is a motor vehicle.

14. The laminated glazing according to claim 6 , wherein the layer of second enamel coats between 0.1% and 3% of the third face of the interior glass sheet.

15. A method for manufacturing the laminated glazing according to claim 1 , comprising:
depositing a layer of a first enamel, of black color, on the periphery of one face of a glass sheet forming an exterior glass sheet,
depositing a layer of a second enamel forming a marking and having a color other than black on one face of a glass sheet forming an interior glass sheet, then,
pre-firing of the first and second enamel layers, then,
bending the exterior and interior glass sheets together, said interior glass sheet being disposed on top of said exterior glass sheet, the layer of the first enamel and the layer of the second enamel facing each other, and then,
laminating the exterior and interior glass sheets by means of a lamination interlayer.

16. The method according to claim 15 , wherein the layer of the first enamel and the layer of the second enamel are deposited by screen-printing an enamel composition or by a digital printing technique.

17. The method according to claim 15 , comprising depositing, with the help of an industrial robot, a seal on a face of the interior glass sheet opposite a face bearing the layer of the second enamel.

Assignees

• Saint Gobain

Inventors

• Bacharouche Jalal

Classifications

• B32B17/10247 Primary

  Laminated safety glass or glazing containing decorations or patterns for aesthetic reasons (containing metal wires for aesthetic reasons B32B17/10422) · CPC title

• B32B17/10036 Primary

  comprising two outer glass sheets · CPC title

• B32B17/10174

  Coatings of a metallic or dielectric material on a constituent layer of glass or polymer · CPC title

• B32B17/10302

  Edge sealing · CPC title

• B32B17/10348

  comprising an obscuration band · CPC title