Item protected by a rough temporary protective cover

Patent metadata

Field	Value
Publication number	US-11465935-B2
Application number	US-201816608456-A
Country	US
Kind code	B2
Filing date	Apr 24, 2018
Priority date	Apr 28, 2017
Publication date	Oct 11, 2022
Grant date	Oct 11, 2022

Abstract

An article includes a glass substrate including two main faces defining two main surfaces separated by edges and a temporary protective layer comprising an organic polymer matrix deposited on at least one portion of a main surface of the glass substrate, wherein the temporary protective layer has a rough surface defined by a surface roughness parameter Sa, corresponding to the arithmetic mean height of the profile of the surface, of greater than 0.2 μm.

First claim

The invention claimed is:

1. An article comprising a glass substrate comprising two main faces defining two main surfaces separated by edges and a temporary protective layer comprising an organic polymer matrix deposited on at least one portion of a main surface of the glass substrate, wherein the temporary protective layer is obtained from a polymerizable composition comprising (meth)acrylate compounds and has a rough surface defined by a surface roughness parameter Sa, corresponding to the arithmetic mean height of the profile of the surface, of greater than 0.2 μm and less than 5.0 μm.

2. The article as claimed in claim 1 , wherein the rough surface has a surface roughness parameter Sz, corresponding to the maximum height of the profile of the surface, of greater than 1.0 μm.

3. The article as claimed in claim 1 , wherein the rough surface has a roughness parameter Rsm, corresponding to a mean width of the elements of the profile, of greater than 0.5 mm.

4. The article as claimed in claim 1 , wherein the surface roughness parameter Sa, corresponding to the arithmetic mean height of the profile of the surface, represents at least 1% of a mean thickness of the temporary protective layer.

5. The article as claimed in claim 1 , wherein the surface roughness parameter Sz, corresponding to the maximum height of the surface, represents at least 10% of a mean thickness of the temporary protective layer.

6. The article as claimed in claim 1 , wherein the substrate is coated with a functional coating deposited on at least one portion of a main surface and the temporary protective layer is deposited on at least one portion of the functional coating.

7. The article as claimed in claim 1 , wherein the functional coating comprises a stack of thin layers successively comprising, starting from the substrate, an alternation of n functional metallic layers based on silver or on a metal alloy containing silver, and of (n+1) antireflection coatings, each antireflection coating comprising at least one dielectric layer, so that each functional metallic layer is positioned between two antireflection coatings.

8. The article as claimed in claim 1 , wherein the roughness is in a form of wavelets.

9. The article as claimed in claim 8 , wherein said wavelets are formed by a deposition roll and the wavelets are parallel to an axis of rotation of the deposition roll.

10. The article as claimed in claim 1 , wherein the roughness is formed by stamping the polymerizable composition with a stamp having a predetermined pattern.

11. The article as claimed in claim 1 , wherein the glass substrate has at least one dimension of greater than 3 m.

12. The article as claimed in claim 11 , wherein the at least one dimension is greater than 6 m.

13. The article as claimed in claim 1 , wherein the glass substrate has at least two dimensions of greater than 3 m, or even one dimension of greater than 3 m and one dimension of greater than 6 m.

Assignees

• Saint Gobain

Inventors

• Devys Lucie
• Guillemot François

Classifications

• C03C2217/78

  Coatings specially designed to be durable, e.g. scratch-resistant · CPC title

• C03C17/3657

  the multilayer coating having optical properties · CPC title

• C03C17/42 Primary

  at least one coating of an organic material and at least one non-metal coating · CPC title

• C03C2218/156

  by magnetron sputtering · CPC title

• C03C17/3644

  the metal being silver · CPC title