WO2019224231A1 - Vitrage comprenant des pistes electroconductrices a base d'argent - Google Patents
Vitrage comprenant des pistes electroconductrices a base d'argent Download PDFInfo
- Publication number
- WO2019224231A1 WO2019224231A1 PCT/EP2019/063177 EP2019063177W WO2019224231A1 WO 2019224231 A1 WO2019224231 A1 WO 2019224231A1 EP 2019063177 W EP2019063177 W EP 2019063177W WO 2019224231 A1 WO2019224231 A1 WO 2019224231A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- glazing
- tracks
- electroconductive
- protective
- zone
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
- C03C17/36—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
- C03C17/36—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal
- C03C17/3602—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal the metal being present as a layer
- C03C17/3605—Coatings of the type glass/metal/inorganic compound
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
- C03C17/36—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal
- C03C17/3602—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal the metal being present as a layer
- C03C17/3644—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal the metal being present as a layer the metal being silver
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
- C03C17/36—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal
- C03C17/3602—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal the metal being present as a layer
- C03C17/3655—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal the metal being present as a layer the multilayer coating containing at least one conducting layer
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
- C03C17/36—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal
- C03C17/3602—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal the metal being present as a layer
- C03C17/3668—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal the metal being present as a layer the multilayer coating having electrical properties
- C03C17/3673—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal the metal being present as a layer the multilayer coating having electrical properties specially adapted for use in heating devices for rear window of vehicles
Definitions
- the invention relates to the field of glazing. It relates more particularly glazing, especially for motor vehicles, including electrically conductive tracks.
- Electroconductive tracks such as heating wires present in motor vehicle glazings, are made from a conductive paste, such as, for example, a screen printed silver paste on a sheet of glass, and are connected to a control system. power supply via connectors welded to the conductive paste. These tracks are often present on the rear windows of motor vehicles.
- the subject of the invention is a glazing unit having at least one transparent zone and at least one opaque zone, said glazing comprising a glass sheet coated on one of its electroconductive silver-based track surfaces in at least one a transparent zone and at least one opaque zone, said electroconductive tracks located in the at least one transparent zone being covered on their upper surface and on their lateral edges by transparent protective tracks based on an oxide.
- the invention also relates to a method for obtaining a glazing according to the invention. This process comprises the following successive steps:
- the glass sheet is typically made of soda-lime glass, but may be of other types of glass, for example borosilicate or aluminosilicate. It can be clear, or preferably tinted, for example in green, gray or blue.
- the light transmission (within the meaning of ISO 9050) of the glass sheet is preferably between 15 and 80%, especially between 30 and 70%.
- the thickness of the glass sheet is preferably between 1 and
- the glass sheet generally has a surface ranging from 1 to 3 m 2 .
- the glass sheet is preferably curved. However, it is preferably flat during the deposition of the electroconductive tracks and the protective tracks. After deposition of these tracks, in particular by screen printing, the glass sheet may undergo various treatments conventionally used in the field of the manufacture of automotive glazing, such as bending and / or tempering treatments intended to impart the shape and the resistance mechanics, and simultaneously conducting the firing of the electroconductive and protective tracks.
- opaque zone is meant an area in which the light transmittance (within the meaning of ISO 9050) is at most 5%, in particular 2% and even 1%, or even zero.
- the opaque areas are preferably located at least at the periphery of the glazing.
- the opaque zones preferably represent at most 40%, especially 30%, and even 20%, of the surface of the glazing. They preferably comprise an opaque mineral layer, in particular an enamel layer.
- the opaque areas then make it possible to protect against ultraviolet radiation polymeric joints for positioning and fixing the glazing on the bodywork of the motor vehicle. They also make it possible to conceal said seals as well as other elements located on the glazing, such as electrical connections or collector strips, intended to collect electricity.
- An enamel is a mineral layer formed by firing an enamel composition comprising a glass frit, especially bismuth borosilicate glass, and pigments. The enamel is preferably a black enamel.
- Transparent area means an area in which the light transmittance (as defined in ISO 9050) is at least 15%, in particular 20% and even 30% or 40%, or even 50% or 60%, or still 70%, measured in places without electroconductive tracks.
- the light transmission factor is generally at most 90%, especially 80%.
- the transparent area is usually located in the central area of the glazing. It preferably represents at least 60%, especially at least 70% and even at least 80%, of the surface of the glazing.
- “Tracks” means a plurality of coating portions having an elongated shape, such as strips or wires.
- the electroconductive tracks occupy preferably between 1 and 20%, especially between 2 and 10%, of the surface of the glazing.
- the electroconductive tracks preferably comprise heating son located at least in a transparent area of the glazing and collector strips (also called “bus bars") located in an opaque area of the glazing.
- the collector strips are generally located parallel to the height of the glazing, on the side edges, and are electrically powered so as to circulate the electric current in the heating son, to which they are connected.
- the heating wires generally extend in the direction of the width of the glazing, between two collector strips.
- the heating wires preferably have a width (in the plane of the glazing) ranging from 0.1 to 1 mm, in particular from 0.25 to 0.7 mm.
- the heating son preferably have, in the final glazing, so after baking, a thickness (according to a normal glazing) ranging from 2 to 30 ym, especially 2 to 20 ym.
- the electroconductive tracks are preferably deposited by serigraphy of a silver paste.
- the silver paste preferably comprises, in the wet state, between 60 and 98% of silver by weight.
- the weight content of silver is preferably at most 90%, especially 80% and even 75%. It is preferably in a range from 66 to 75%, especially from 68 to 70%.
- Low silver grades are particularly suitable for lead-free solder alloys.
- the rest includes typically glass frit and an organic medium, the latter being removed during cooking.
- a screen printing method comprises the deposition, in particular with the aid of a doctor blade, of a pasty liquid on a substrate through mesh of a screen printing screen.
- the meshes of the screen are closed in the portion corresponding to the areas of the substrate which must remain bare, so that the paste can pass through the screen in the areas to be printed, in a predefined pattern.
- the selective sealing of the stitches is therefore made according to the negative of the pattern to be printed.
- This selective sealing is generally performed by applying on the screen a photocurable resin and then by insolation, by means of ultraviolet radiation, the parts of the screen to be sealed. Selective insolation is for example achieved through a slide comprising a transparent support, typically polyester, coated with an ultraviolet opaque ink deposited according to the pattern to be printed.
- the mesh of the screen is chosen according to the viscosity and the surface tension of the paste as well as the thickness of the desired tracks.
- the screens used for the screen printing of the electroconductive tracks preferably comprise 77 wires per cm for a wire diameter of 48 ⁇ m or 77 wires per cm for a wire diameter of 55 ⁇ m, or 90 wires per cm for a wire diameter of 48 ym.
- Protective tracks cover the upper surface and the lateral edges of the electroconductive tracks located in the transparent zone.
- the visible electroconductive tracks are therefore totally protected from the environment: their lower surface is in contact with the glass sheet and the parts likely to be in contact with the environment, namely, the upper surface (parallel to the glass sheet) and the side edges (in the direction of the thickness of the tracks, substantially normal to the glass sheet) are covered by the protective tracks.
- the protective tracks only the electroconductive tracks located in a transparent zone of the glazing are covered by the protective tracks.
- the electroconductive tracks located in the opaque areas of the glazing are indeed not visible so that their fading is not inconvenient from an aesthetic point of view.
- at least some or all of the electrically conductive tracks are covered by the protective tracks.
- the thickness of the protective tracks is preferably in a range from 0.1 to 5 ⁇ m, especially 0.2 to 3 ⁇ m. Low thicknesses have indeed been found to be sufficient to prevent tarnishing of the silver-based tracks. In addition, high thicknesses increase the visibility of the protective tracks, which is detrimental to the aesthetics of the glazing.
- the protective tracks preferably have a width, always in the plane of the glazing, (slightly) greater than that of the electroconductive tracks that they protect. This width is typically 0.2 to 1.1 mm, especially 0.3 to 0.8 mm.
- the protective tracks are transparent and are based on an oxide.
- the protective tracks are preferably colorless.
- the light transmittance, according to ISO 9050, of the material constituting the protective tracks is preferably at least 90% for a thickness of 1 mm.
- the term "base" means that the material constituting the protective tracks preferably contains at least 50% by weight of an oxide. This content is preferably at least 60%, especially 70% and even 80% or 90%, or even 95 or 99%.
- the material may especially consist of an oxide.
- the transparent tracks are preferably based on an oxide of at least one element chosen from silicon, titanium, zirconium and tin. Tracks based or even made of silicon oxide are preferred. Silicon oxide combines several advantages, namely a high transparency, low reflection and lack of color that makes the tracks completely invisible to the user, and a great ability to withstand sulfur pollution.
- Protective tracks are preferably deposited by screen printing a sol-gel solution.
- sol-gel solution is meant a solution, preferably aqueous, containing precursors of the material forming the protective tracks.
- Said precursors preferably comprise organometallic compounds of said material and / or nanoparticles of said material and / or the products of chemical reactions that may occur between said organometallic compounds and other constituents of the solution, for example water.
- the organometallic compounds are in fact capable of undergoing hydrolysis and / or condensation reactions during the formation of the solution, therefore before application.
- the screen used for the screen printing step of the protective tracks has a pattern similar to that of the screen used for the screen printing stage of the tracks electrically.
- the protective tracks cover only the electroconductive tracks located in the transparent areas of the glazing, however, the meshes of the screen corresponding to the opaque areas are closed.
- the width of the patterns is slightly higher than those of the patterns of the screen of the electroconductive tracks.
- the protective tracks will have a lower thickness than the electroconductive tracks.
- the serigraphy screen of the protective tracks will therefore have a higher number of threads per centimeter, for example 120 threads / cm, and therefore a smaller mesh.
- the glazing according to the invention is preferably a rear window of a motor vehicle.
- the method according to the invention preferably comprises a drying step at the end of each step of depositing tracks.
- the drying is preferably carried out at a temperature between 100 and 200 ° C.
- the firing step of the electroconductive and protective tracks is preferably carried out simultaneously with a bending of the glass sheet.
- the firing temperature is preferably between 600 and 800 ° C, in particular between 620 and 750 ° C.
- Figure 1 is a representation of a glazing unit according to the invention.
- FIG. 2 is a schematic sectional representation of a glazing unit according to the invention, in part of the transparent zone.
- the glazing 1 is a rear window of a motor vehicle. It comprises a glass sheet 2 and has a central transparent zone 3 and a peripheral opaque zone 4, the opaque zone 4 comprising, deposited on the glass sheet 2 a layer of black enamel.
- the glazing 1 further comprises electroconductive tracks located in the opaque zone 4, and not visible, and electrically conductive tracks 5, located in the transparent zone 3, in the form of heating son.
- the heating son 5 extend here in the width of the glazing and are for example deposited by screen printing of a silver paste.
- the heating wires are electrically connected to other electroconductive tracks, in this case non-visible collector strips, located on the lateral edges of the pane 1, and which are for example also deposited by screen printing of a silver paste.
- Transparent protective tracks 6 protect, in the transparent zone 3 of the pane 1, the heating wires 5, covering both their upper surface 50 and their lateral edges 51.
- the protective tracks 6 are for example made of silica and deposited by screen printing. a sol-gel solution.
- a 4.85 mm thick glass sheet was screen-printed with silver electroconductive tracks.
- a silver paste containing 80% silver was screen printed in a known manner using a screen containing 77 threads / cm and then dried at 150 ° C. for 2 minutes. The silver paste was then fired at 710 ° C for 3 minutes.
- the example according to the invention differs from the comparative example in that protective tracks have been deposited on the electroconductive tracks based on silver.
- the protective tracks were deposited by screen printing a sol-gel solution containing silica precursors using a screen containing 120 threads / cm and then dried at 150 ° C. for 2 minutes.
- the tarnish resistance was measured as follows: in a desiccator containing 500 ml of deionized water is disposed a cup containing 10 g of sulfur flower. The samples to be studied are introduced vertically into the desiccator, the latter being then sealed and placed at a temperature of 70 ° C for 2 days. The optical appearance of the samples is then evaluated qualitatively.
- the tracks presented tasks and an iridescent appearance characterized by a reflection aspect ranging from orange to brown.
- the tracks have a homogeneous gray appearance.
Landscapes
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Surface Treatment Of Glass (AREA)
- Joining Of Glass To Other Materials (AREA)
- Laminated Bodies (AREA)
- Surface Heating Bodies (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201980002164.9A CN110770187A (zh) | 2018-05-22 | 2019-05-22 | 包括基于银的导电轨道的玻璃制品 |
BR112020021997-5A BR112020021997A2 (pt) | 2018-05-22 | 2019-05-22 | vidraça que compreende pistas eletrocondutoras à base de prata |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1870582A FR3081460B1 (fr) | 2018-05-22 | 2018-05-22 | Vitrage comprenant des pistes electroconductrices a base d'argent |
FR1870582 | 2018-05-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2019224231A1 true WO2019224231A1 (fr) | 2019-11-28 |
Family
ID=63834306
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2019/063177 WO2019224231A1 (fr) | 2018-05-22 | 2019-05-22 | Vitrage comprenant des pistes electroconductrices a base d'argent |
Country Status (4)
Country | Link |
---|---|
CN (1) | CN110770187A (fr) |
BR (1) | BR112020021997A2 (fr) |
FR (1) | FR3081460B1 (fr) |
WO (1) | WO2019224231A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2021105422A1 (fr) * | 2019-11-29 | 2021-06-03 | Saint-Gobain Glass France | Procede d'obtention de vitrages munis de motifs electroconducteurs |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2385529A1 (fr) * | 1977-03-28 | 1978-10-27 | Teijin Ltd | Stratifie conducteur transparent |
FR2601194A1 (fr) * | 1986-07-04 | 1988-01-08 | Central Glass Co Ltd | Antenne de glace de fenetre de vehicule utilisant un film conducteur transparent |
FR2709911A1 (fr) * | 1993-09-07 | 1995-03-17 | Splintex Sa | Vitrage feuilleté, et procédé et dispositif pour la fabrication d'un tel vitrage. |
EP1577133A2 (fr) * | 2004-03-05 | 2005-09-21 | Inova GmbH Technische Entwicklungen | Vitres de véhicule automobile, feuilles de protection et images imprimée et procédé de fabrication des mêmes |
US20110174796A1 (en) * | 2010-01-21 | 2011-07-21 | Toyota Motor Engineering & Manufacturing North America, Inc. | Vehicles Including Rear Defroster Assemblies with Protective Barriers |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4786784A (en) * | 1987-02-17 | 1988-11-22 | Libbey-Owens-Ford Co. | Method for producing an electrically heated window assembly and resulting article |
CN102795793B (zh) * | 2012-09-11 | 2014-09-24 | 福耀玻璃工业集团股份有限公司 | 一种可电加热的低辐射镀膜夹层玻璃 |
FR3054771B1 (fr) * | 2016-07-27 | 2020-11-06 | Saint Gobain | Vitrage muni d'un dispositif conducteur electrique avec zones de soudure ameliorees |
CN107097489A (zh) * | 2017-06-06 | 2017-08-29 | 成都固泰电子有限责任公司 | 汽车前车门加热玻璃及加热方法 |
-
2018
- 2018-05-22 FR FR1870582A patent/FR3081460B1/fr active Active
-
2019
- 2019-05-22 WO PCT/EP2019/063177 patent/WO2019224231A1/fr active Application Filing
- 2019-05-22 CN CN201980002164.9A patent/CN110770187A/zh active Pending
- 2019-05-22 BR BR112020021997-5A patent/BR112020021997A2/pt not_active Application Discontinuation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2385529A1 (fr) * | 1977-03-28 | 1978-10-27 | Teijin Ltd | Stratifie conducteur transparent |
FR2601194A1 (fr) * | 1986-07-04 | 1988-01-08 | Central Glass Co Ltd | Antenne de glace de fenetre de vehicule utilisant un film conducteur transparent |
FR2709911A1 (fr) * | 1993-09-07 | 1995-03-17 | Splintex Sa | Vitrage feuilleté, et procédé et dispositif pour la fabrication d'un tel vitrage. |
EP1577133A2 (fr) * | 2004-03-05 | 2005-09-21 | Inova GmbH Technische Entwicklungen | Vitres de véhicule automobile, feuilles de protection et images imprimée et procédé de fabrication des mêmes |
US20110174796A1 (en) * | 2010-01-21 | 2011-07-21 | Toyota Motor Engineering & Manufacturing North America, Inc. | Vehicles Including Rear Defroster Assemblies with Protective Barriers |
Non-Patent Citations (1)
Title |
---|
XU ZHANG ET AL: "Large-size graphene microsheets as a protective layer for transparent conductive silver nanowire film heaters", CARBON, vol. 69, 19 December 2013 (2013-12-19), pages 437 - 443, XP055201050, ISSN: 0008-6223, DOI: 10.1016/j.carbon.2013.12.046 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2021105422A1 (fr) * | 2019-11-29 | 2021-06-03 | Saint-Gobain Glass France | Procede d'obtention de vitrages munis de motifs electroconducteurs |
FR3103809A1 (fr) * | 2019-11-29 | 2021-06-04 | Saint-Gobain Glass France | Procédé d’obtention de vitrages munis de motifs électroconducteurs |
CN113226780A (zh) * | 2019-11-29 | 2021-08-06 | 法国圣戈班玻璃厂 | 用于获得配有导电图案的玻璃窗的方法 |
Also Published As
Publication number | Publication date |
---|---|
FR3081460B1 (fr) | 2024-04-26 |
BR112020021997A2 (pt) | 2021-01-26 |
CN110770187A (zh) | 2020-02-07 |
FR3081460A1 (fr) | 2019-11-29 |
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