Motor vehicle roof glazing

Patent metadata

Field	Value
Publication number	US-11964903-B2
Application number	US-202118258740-A
Country	US
Kind code	B2
Filing date	Dec 22, 2021
Priority date	Dec 22, 2020
Publication date	Apr 23, 2024
Grant date	Apr 23, 2024

Abstract

A method for manufacturing a motor vehicle roof incorporating a glazing, in which at least one opacifying layer of ink(s), in particular at least one layer of colored ink(s), is applied by digital printing, in particular by inkjet, over at least 40% of the surface of one of the faces of at least one glass sheet, such that the composition of said ink(s) includes at least one glass frit, and where applicable one or more inorganic pigment(s), with a D90 value for the particle size distribution of less than 2 μm, and such that the ink(s) have a viscosity of between 1 and 50 mPa·s, the ink(s) further including a non-stick agent and/or a non-stick component and/or at least one non-stick agent and/or at least one non-stick layer being further applied to at least one layer of ink(s) and/or to at least one glass sheet.

First claim

The invention claimed is:

1. A method for manufacturing a motor vehicle roof incorporating a glazing, the method comprising applying by digital printing at least one opacifying layer of ink(s), over at least 40% of a surface of a face of at least one glass sheet, such that a composition of said ink(s) comprises at least one glass frit, and optionally one or more inorganic pigment(s), with a D90 value for a particle size distribution of less than 2 μm, and such that said ink(s) have a viscosity of between 1 and 50 mPa·s, said ink(s) further comprising a non-stick agent and/or a non-stick component and/or at least one non-stick agent and/or at least one non-stick layer being further applied to at least one layer of ink(s) and/or to at least one glass sheet.

2. The method according to claim 1 , wherein the digital printing is performed using a single-pass printing machine.

3. The method according to claim 1 , wherein a printer used to digitally print the at least one opacifying layer of ink(s) is equipped with six series of print heads to enable printing with a set of six colors.

4. The method according to claim 1 , wherein a surface tension of the ink(s) is between 20 and 40 mN/m.

5. The method according to claim 1 , wherein the at least one opacifying layer of ink(s) is applied by inkjet.

6. The method according to claim 1 , wherein the at least one opacifying layer of ink(s) is at least one layer of colored ink(s).

7. A motor vehicle roof able to be obtained by the method according to claim 1 , said vehicle roof incorporating a glazing comprising:
one or more glass sheets, at least one glass sheet being coated over at least 40% of the surface of at least one face with at least one opacifying layer of ink(s), such that the composition of said ink(s) comprises at least one glass frit, and
at least one layer of ink(s) and/or at least one glass sheet being coated with at least one non-stick agent and/or at least one non-stick layer, and/or
at least one layer of ink(s) comprising at least one non-stick agent and/or one non-stick component.

8. The motor vehicle roof according to claim 7 , wherein the opacifying layer of ink(s) is at least one layer of colored ink(s).

9. The motor vehicle roof according to claim 7 , wherein the composition of said ink(s) comprises one or more inorganic pigment(s).

10. The motor vehicle roof according to claim 7 , wherein said glazing is a monolithic glazing formed of a single glass sheet, said sheet being coated with at least one layer of said ink(s) on one face, or wherein said glazing is a laminated glazing formed of at least two glass sheets and an interlayer, at least one of said two glass sheets being coated with at least one layer of said ink(s) on one face.

11. The motor vehicle roof according to claim 7 , wherein said glazing has a light transmission TL of less than 10%, or an optical density of greater than or equal to 1.

12. The motor vehicle roof according to claim 7 , wherein two different decorations are printed, for a different effect on an outside and on an inside of a passenger compartment.

13. The motor vehicle roof according to claim 7 , wherein several layers of inks are overlayed on the same face in order to produce a double image.

14. The motor vehicle roof according to claim 7 , wherein said glazing is equipped, on the same face and/or on at least two different faces of glass sheet(s) of the glazing, with at least two different coatings or two different layers including at least one layer of said ink(s), a second layer of the two different layers or a second coating of the two different coatings being either a second mineral layer formed of digital printing ink(s), or a layer with a different decorative effect from said layer or layers of ink(s), or a layer or a coating or a film or a sheet with an additional functional effect.

15. The motor vehicle roof according to claim 10 , wherein said single glass sheet is coated with said at least one layer of said ink(s) on a face facing an interior of the vehicle.

16. The motor vehicle roof according to claim 10 , wherein said two glass sheets include an exterior glass sheet to be oriented toward an exterior of the vehicle and an interior glass glass to be oriented toward an interior of the vehicle, and wherein said at least one layer of said ink(s) is coated on a face of the exterior glass sheet facing the interlayer, or is coated on a face of the interior glass sheet facing the interlayer or is coated on a face of the interior glass sheet facing the interior of the vehicle.

17. The motor vehicle roof according to claim 11 , wherein said glazing has a light transmission TL of less than 0.1%, or an optical density of greater than or equal to 3.

18. The motor vehicle roof according to claim 13 , wherein the several layers of inks include a first layer or print forming a first image, a second layer or print being a white layer, and a third layer or print forming a second image.

19. The motor vehicle roof according to claim 14 , wherein the layer or the coating or the film or the sheet with an additional functional effect is a low-emissivity or solar control coating.

Assignees

• Saint Gobain

Inventors

• Chahboune Kamel
• Yon Alexia
• Jamart Juliette

Classifications

• C03C17/04 Primary

  by fritting glass powder · CPC title

• B32B17/10036

  comprising two outer glass sheets · CPC title

• B32B17/10339

  Specific parts of the laminated safety glass or glazing being colored or tinted (tinted glass sheet B32B17/1011; tinted interlayer B32B17/10651) · CPC title

• B32B17/1044

  Invariable transmission · CPC title

• B60J1/001

  Double glazing for vehicles · CPC title