Wired glazing and a process for manufacture thereof

Patent metadata

Field	Value
Publication number	US-10194490-B2
Application number	US-201515510568-A
Country	US
Kind code	B2
Filing date	Sep 10, 2015
Priority date	Sep 12, 2014
Publication date	Jan 29, 2019
Grant date	Jan 29, 2019

Abstract

A wired glazing is disclosed comprising a ply of interlayer material, having a first busbar and an auxiliary busbar and heating wires between them. An adhesive layer is arranged between the first busbar and the ply of interlayer material. An auxiliary adhesive layer is arranged where an edge of the auxiliary busbar extends beyond an edge of the first busbar. The auxiliary adhesive layer bonds the auxiliary busbar to the ply of interlayer material. A corresponding process for manufacturing a wired glazing is disclosed.

First claim

The invention claimed is:

1. A glazing, comprising:
a ply of interlayer material;
a first busbar laid over the ply of interlayer material;
an adhesive layer between the first busbar and the ply of interlayer material, the adhesive layer bonding together the first busbar and the ply of interlayer material;
at least one heating wire laid over the first busbar;
an auxiliary busbar at least partly laid over the heating wire and at least partly laid over the first busbar;
and an auxiliary adhesive layer arranged where an edge of the auxiliary busbar extends beyond an edge of the first busbar;
wherein a solder layer suitable for melting in an autoclave covers at least part of a surface of the first busbar or the auxiliary busbar and is arranged to contact the heating wire;
wherein the auxiliary adhesive layer bonds the auxiliary busbar to the ply of interlayer material; and
wherein the solder layer covers both a surface of the first busbar in contact with the heating wire and an opposite surface of the first busbar, or wherein the solder layer covers both a surface of the auxiliary busbar in contact with the heating wire and anopposite surface of the auxiliary busbar.

2. The glazing according to claim 1 , wherein a distance between the edge of the auxiliary busbar and the edge of the first busbar is in a range 2 mm to 5 mm.

3. The glazing according to claim 1 , wherein the first busbar has a width in a range 2 mm to 8 mm.

4. The glazing according to claim 1 , wherein the auxiliary busbar has a width in a range 4 mm to 12 mm.

5. The glazing according to claim 1 , wherein the first busbar is of metal of thickness in a range 50 um to 200 um.

6. The glazing according to claim 1 , wherein the solder layer covers substantially all of a surface of the first busbar in contact with the heating wire or wherein the solder layer covers substantially all of a surface of the auxiliary busbar in contact with the heating wire.

7. The glazing according to claim 1 , wherein the solder layer has thickness in a range 1 um to 50 um.

8. The glazing according to claim 1 , wherein the solder layer melting point is in a range 120 degrees C. to 150 degrees C.

9. The glazing according to claim 1 , wherein the adhesive layer has thickness in a range 10 um to 100 um.

10. The glazing according to claim 1 , wherein an array of heating wires extends between, and is in electrical contact with, first and second busbars for supplying electrical power to the array of heating wires.

11. The glazing according to claim 1 , wherein the ply of interlayer material is arranged between first and second plies of glazing material.

12. The glazing according to claim 1 , wherein the first busbar has a width in a range 4 mm to 5 mm.

13. The glazing according to claim 1 , wherein the auxiliary busbar has a width in a range 8 mm to 9 mm.

14. The glazing according to claim 1 , wherein the first busbar is made of copper with a thickness in a range 90 um to 100 um.

15. The glazing according to claim 1 , wherein the solder layer has thickness in a range 5 um to 20 um.

16. The glazing according to claim 1 , wherein the solder layer melting point is in a range 125 degrees C. to 135 degrees C.

17. The glazing according to claim 1 , wherein the adhesive layer has thickness in a range 20 um to 50 um.

18. A process for manufacture of a glazing, comprising:
providing a ply of interlayer material;
laying a first busbar over the a ply of interlayer material;
arranging an adhesive layer between the first busbar and the ply of interlayer material to bond together the first busbar and the ply of interlayer material;
laying at least one heating wire over the first busbar;
laying an auxiliary busbar at least partly over the heating wire and at least partly over the first busbar;
arranging an auxiliary adhesive layer where an edge of the auxiliary busbar extends beyond an edge of the first busbar;
laying a solder layer on at least part of a surface of the first busbar or the auxiliary busbar and arranging the solder layer to contact the heating wire;
arranging an adhesive layer between the first busbar and the ply of interlayer material for bonding them together;
arranging an auxiliary adhesive layer where an edge of the auxiliary busbar extends beyond an edge of the first busbar for bonding the auxiliary busbar to the ply of interlayer material by the auxiliary adhesive layer; and
wherein the solder layer covers both a surface of the first busbar in contact with the heating wire and an opposite surface of the first busbar or wherein the solder layer covers both a surface of the auxiliary busbar in contact with the heating wire and an opposite surface of the auxiliary busbar.

19. The process for manufacture of a glazing according to claim 18 , comprising positioning the edge of the auxiliary busbar and the edge of the first busbar such that the distance between them is in a range 2 mm to 5 mm.

Assignees

• Pilkington Group Ltd

Inventors

• Chamberlain Mark Andrew
• Mellor Leigh Francis

Classifications

• H05B3/84 Primary

  Heating arrangements specially adapted for transparent or reflecting areas, e.g. for demisting or de-icing windows, mirrors or vehicle windshields · CPC title

• H05B2203/011

  Heaters using laterally extending conductive material as connecting means · CPC title

• B32B17/10761

  containing vinyl acetal · CPC title

• B32B17/10302

  Edge sealing · CPC title

• B32B17/10293

  Edge features, e.g. inserts or holes · CPC title