EP3549389B1 - Vitrage comprenant un réseau de fils chauffants, et son procédé de fabrication - Google Patents

Vitrage comprenant un réseau de fils chauffants, et son procédé de fabrication Download PDF

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Publication number
EP3549389B1
EP3549389B1 EP17807923.2A EP17807923A EP3549389B1 EP 3549389 B1 EP3549389 B1 EP 3549389B1 EP 17807923 A EP17807923 A EP 17807923A EP 3549389 B1 EP3549389 B1 EP 3549389B1
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EP
European Patent Office
Prior art keywords
busbar
array
glazing
conductive track
tape
Prior art date
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Active
Application number
EP17807923.2A
Other languages
German (de)
English (en)
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EP3549389A1 (fr
Inventor
Jonathan Barclay Dixon
Mark Andrew Chamberlain
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pilkington Group Ltd
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Pilkington Group Ltd
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Publication date
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Publication of EP3549389A1 publication Critical patent/EP3549389A1/fr
Application granted granted Critical
Publication of EP3549389B1 publication Critical patent/EP3549389B1/fr
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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/84—Heating arrangements specially adapted for transparent or reflecting areas, e.g. for demisting or de-icing windows, mirrors or vehicle windshields
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/02—Details
    • H05B3/06—Heater elements structurally combined with coupling elements or holders
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/011—Heaters using laterally extending conductive material as connecting means
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/014—Heaters using resistive wires or cables not provided for in H05B3/54
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/016—Heaters using particular connecting means
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/017—Manufacturing methods or apparatus for heaters

Definitions

  • the invention is concerned with a glazing comprising an array of heating wires.
  • the heating wires extend between and are in electrical contact with two opposing busbars, typically positioned at or near the upper and lower edges of the glazing.
  • EP 1680945 B1 discloses a wired heated automotive glazing where heating wires are applied across a first busbar, second busbar and third busbar, and are severed to prevent electrical connection between the second and third busbars.
  • EP 1393593 B1 discloses a wired heated automotive glazing where the busbars extend laterally relative to heating resistors.
  • US7180031B1 describes a power connection apparatus for an integrated heater in a glazing.
  • the present invention provides, in a first aspect, a laminated glazing for a vehicle according to claim 1.
  • the laminated glazing further comprises a connector for applying the voltage to the conductive track, wherein the first busbar is disposed between the second busbar and the connector.
  • the tape comprises a polyester, a polyamide or a polyimide.
  • the tape comprises an aromatic polyimide or poly(ethylene 2,6-napthalate) or plasticiser-free PVB.
  • shrinkage of the tape is less than 0.4% following oven heating at 200 °C for 2 hours.
  • the tape is 1 ⁇ m to 200 ⁇ m thick, preferably 12 ⁇ m to 130 ⁇ m thick, more preferably 20 ⁇ m to 80 ⁇ m thick, most preferably 22 ⁇ m to 55 ⁇ m thick.
  • the tape is of a width not more than 2 cm wider than that of the conductive track section to which it is attached.
  • the conductive track is between the first busbar and the lower edge of the glazing.
  • the present invention provides a process for manufacture of a laminated glazing according to claim 9.
  • the tape comprises a polyester, a polyamide or a polyimide.
  • the tape comprises an aromatic polyimide or poly(ethylene 2,6-napthalate) or plasticiser-free PVB.
  • the process further comprises a step of cutting the array of heating wires, preferably at a glazing edge.
  • the inventors have found that in a glazing with first and second busbars and with an array of heating wires extending over them, further comprising a conductive track in electrical connection with the second busbar and a connector, a polymer tape, bonded to the conductive track, eliminates a short circuit effect between the conductive track and the heating wires.
  • the said connector for the second busbar and a connector for the first busbar may be arranged adjacent to each other.
  • the inventors have additionally found that such a glazing eliminates short circuit effect throughout the lifetime of the glazing, allowing for heating and cooling cycles in use.
  • An additional advantage of the present invention is that it precludes the requirement to cut heating wires that connect the conductive track and a busbar of opposite polarity to the conductive track to prevent a short circuit effect. Cutting of such "shorting" heating wires may be difficult for the operator, reducing efficiency, or costly to perform in an automated manner. Where cutting of such "shorting" wires is carried out it is possible that, due to the aforementioned difficulties, a single or small number of such "shorting" wires remain. Such remaining “shorting" wires can be highly dangerous due to the concentration of current flow through a single wire or a small number of wires leading to a high temperature and a risk of fire.
  • Application of a polymer tape, as described by the invention is a low cost solution to a problem of "shorting" wires, and may be used with or without a "shorting" wire cutting step.
  • a further additional advantage of the present invention is that, in the event that the heating wires extend beyond the edge of the glazing proximate to the conductive track, the conductive track is protected from moisture that may wick into the laminate. Such moisture is known to cause corrosion and may cause failure over the lifetime of the glazing.
  • a short circuit occurs when electrical current flows along a path of least resistance, essentially bypassing the intended functionality of the circuit.
  • a short circuit may cause failure of the glazing unit by overheating, fire or explosion.
  • a laminated glazing comprises a ply of interlayer material arranged between two outer plies.
  • the outer plies may be glass, polycarbonate or another suitable material.
  • the interlayer may comprise polyvinyl butyral (PVB), polyethylene terephthalate (PET) or another suitable material.
  • PVB polyvinyl butyral
  • PET polyethylene terephthalate
  • a laminated glazing for a vehicle will generally have a major face orientated to the inside of the vehicle, a major face orientated to the outside of the vehicle, an upper edge, a lower edge and two vertical edges when viewed in the vehicle aperture.
  • the laminated glazing is preferably free of opaque objects that will obstruct the view of the vehicle operator within the vision area.
  • the vision area is the substantially transparent central portion of the laminated glazing through which vehicle operator will view the vehicle surroundings. Many jurisdictions have regulations preventing obstruction of the vision area.
  • Laminated glazings according to the invention are suitable for use in a range of vehicles, including automobiles, railway rolling stock, aircraft and marine craft.
  • the laminated glazing is furnished with an array of heating wires.
  • the array of heating wires provides resistive heating to the laminated glazing.
  • the array of heating wires is preferably configured to allow uniform heating of the glazing.
  • the array of heating wires is preferably configured to extend across a major face of the glazing.
  • the array of heating wires preferably comprises a series of parallel wires.
  • the array of heating wires comprises a series of wires at acute and obtuse angles to one another.
  • the array of heating wires comprises wires electrically connected in parallel.
  • the array of heating wires comprises wires electrically connected in series.
  • An array of parallel wires may provide improved durability of the heating array, while an array of series wires may produce a system that has an alternative heating pattern.
  • the array of heating wires comprises wires extending substantially between the lower edge of the glazing and the upper edge of the glazing.
  • the array of heating wires comprises wires extending substantially between the vertical edges of the glazing. The orientation of the array of heating wires will be selected depending on the particular requirements of the aperture and the user.
  • the array of heating wires preferably comprises a series of parallel vertical wires electrically connected in parallel.
  • the array of heating wires comprises a series of parallel horizontal wires electrically connected in parallel.
  • the array of heating wires comprises parallel vertical wires and parallel horizontal wires.
  • the array of heating wires comprises wires of equal gauge.
  • the array of heating wires comprises wires of differing gauges.
  • the array of heating wires comprises equally spaced wires.
  • the array of heating wires comprises differing spacing between wires. Wires of differing gauge and spacing may be used to preserve the uniform heating of the glazing.
  • the array of heating wires comprises substantially straight wires.
  • the array of heating wires comprises wires with meandering, wavy or curved paths. Wires with meandering, wavy or curved paths may reduce influence of the heating array on the vision of the user, for example by controlling the diffraction of light by the array of heating wires.
  • the array of heating wires may comprise wires selected from the group comprising: printed wires, etched wires, extruded wires, or a combination thereof.
  • the laminated glazing is preferably furnished with busbars.
  • the busbars are in physical contact with the array of heating wires.
  • the busbars are of metal, more preferably copper, of a thickness (i.e. height from the substrate to which they are applied) in a range of 25 ⁇ m to 200 ⁇ m, more preferably 40 ⁇ m to 60 ⁇ m.
  • a thinner busbar will provide better lamination ability but reduced electrical conductivity, while a thicker busbar will provide improved electrical conductivity but reduced lamination ability.
  • the busbars are between 1 mm and 10 cm in width, more preferably between 9 mm and 3.5 cm in width.
  • the busbars are of a ceramic frit containing metal particles.
  • the metal particles are silver.
  • the ceramic frit busbars may be applied by screen printing, inkjet printing or the like.
  • a ceramic frit busbar may be preferable to a metal busbar by its reduced thickness, but may be more susceptible to damage than a metal busbar.
  • a first busbar and a second busbar are arranged to allow uniform heating of the glazing by the array of heating wires. More preferably the first busbar and the second busbar follow paths with sections that are substantially parallel to each other.
  • the first busbar has a section proximate to the lower edge of the glazing and the second busbar has a section proximate to the upper edge of the glazing.
  • the busbars may be in electrical communication with a connector.
  • the busbars may be furnished with a connector.
  • a conductive track is electrically connected to a busbar and to a connector to supply electrical power to the busbar from an external circuit.
  • the connectors are disposed proximate to a glazing edge. Even more preferably the connectors are disposed proximate to the lower edge of the glazing.
  • the connectors are disposed between the lower edge of the glazing and the first busbar.
  • the connectors are disposed in close proximity to each other.
  • the connector is soldered to the conductive track.
  • the connector is soldered to the busbar.
  • the solder is preferably of a lead-free type.
  • the connectors are attached to the busbar using a conductive adhesive.
  • the connectors are attached to the conductive track using a conductive adhesive.
  • a conductive adhesive may provide a more easily formed connection than the soldered connection.
  • a soldered connection may be of reduced resistance than a conductive adhesive connection.
  • the laminated glazing is preferably furnished with conductive tracks.
  • the conductive tracks are of metal, more preferably copper, of a thickness in a range of 25 ⁇ m to 200 ⁇ m, more preferably 40 ⁇ m to 60 ⁇ m.
  • a thinner conductive track will provide better lamination ability but reduced electrical conductivity, while a thicker conductive track will provide improved electrical conductivity but reduced lamination ability.
  • the conductive tracks are between 0.1 cm and 10 cm in width, more preferably between 0.9 mm and 3.5 cm in width.
  • the conductive tracks are of a ceramic frit containing metal particles.
  • the metal particles are silver.
  • the ceramic frit conductive track may be applied by screen printing, inkjet printing or the like.
  • a ceramic frit conductive track may be preferable to a metal conductive track by its reduced thickness, but may be more susceptible to damage than a metal conductive track.
  • a conductive track supplies electrical power to the second busbar.
  • the conductive track is in physical contact with the second busbar and a connector.
  • a first section of the conductive track is in close proximity to the first busbar and the lower edge of the glazing and a second section of the conductive track extends between the first section and the second busbar.
  • the first section is furnished with a tape for insulating the first section from the array of heating wires.
  • the first section is between the second busbar and the lower edge of the glazing.
  • the second section of the conductive track extends substantially parallel to a vertical glazing edge.
  • the second section extends within 30 cm of a vertical glazing edge.
  • the second section extends within 15 cm of a vertical glazing edge. Yet more preferably the second section extends within 12 cm of a vertical glazing edge. Preferably the second section does not impinge on the vision area of the laminated glazing. Preferably the second section extends no closer than 0.5 cm from a glazing edge. Yet more preferably the second section extends no closer than 3 cm from a glazing edge. A second section closer to a glazing edge may be at risk of corrosion or other negative effects from the ingress of water or damage to the edge of the glazing. A further conductive track may supply electrical connector to the first busbar.
  • the tape comprises polymer, preferably a polyester, polyamide or polyimide, more preferably an aromatic polyimide or poly(ethylene 2,6-napthalate) (PEN).
  • the tape may comprise PVB, preferably a plasticiser-free PVB.
  • a plasticiser-free PVB contains less 5% plasticiser, preferably less than 1% plasticiser.
  • a suitable plasticiser-free PVB is Mowital® or Trosifol® Thin Film, available from Kuraray Europe GmbH, Hattersheim, Germany. Plasticiser-free PVB may be a preferred tape composition due strong bonding to other components following lamination.
  • the tape is of a thickness in a range of 1 ⁇ m to 200 ⁇ m, preferably 12 ⁇ m to 130 ⁇ m, more preferably 20 ⁇ m to 80 ⁇ m, most preferably 22 ⁇ m to 55 ⁇ m.
  • a thicker tape will provide improved insulating properties and handling ability with reduced lamination ability, while a thinner tape will provide improved lamination ability with reduced insulating properties and handling ability.
  • the tape is of a width a least as great as that of the conductive track section to which it is attached.
  • the tape is of a width not more than 2 cm wider than that of the conductive track section to which it is attached.
  • a tape not more than 2 cm wider than the conductive track avoids lamination faults associated with the tape, and reduces cost.
  • the tape is arranged within the laminate such that it is completely overlapped with an area of the laminate outside the vision area of the laminate.
  • shrinkage of the tape is less than 0.4% following oven heating at 200 °C for 2 hours, more preferably less than 0.15%.
  • a tape with a high shrinkage property may have reduced lamination ability, and may not sufficiently insulate the conductive track from the array of heating wires.
  • dielectric strength of the tape is greater than 80 kV/mm.
  • peel strength of the tape from copper is greater than 1.2 N/cm.
  • the tape is preferably applied as a single piece. Alternatively the tape is applied in multiple sections. The tape may be applied from a roll or applied as a pre-shaped layer.
  • the tape is preferably transparent. Alternatively the tape is opaque.
  • the tape may be tinted, coloured or dyed.
  • the process further comprises the steps of providing a first ply of interlayer material, positioning a conductive track alongside the ply of interlayer material, configuring an arrangement such that the ply of interlayer material is interleaved between a first rigid ply and a second rigid ply, and the conductive track and the array of heating wires are between the ply of interlayer material and the first rigid ply, and forming a laminated glazing.
  • the conductive track is provided with a tape for insulating the conductive track from the array of heating wires.
  • the conductive track is laid over the first ply of interlayer material and adhered to the ply of interlayer material using a soldering iron, either in discrete places along a length of the conductive track or by running the soldering iron along a length of the conductive track.
  • the conductive track is adhered to the ply of interlayer material using heated air, vibrations or other common means.
  • a further ply of interlayer material may be configured in the arrangement such that it is interleaved between the ply of interlayer material and the first rigid ply.
  • the process further comprises a step of cutting the array of heating wires.
  • the array of heating wires may be cut at a glazing edge, to ensure that the array of heating wires does not extend beyond the glazing. Cutting the array of heating wires at a glazing edge is an efficient method of cutting.
  • the array of heating wires may be cut between the conductive track and the glazing edge. Cutting the array of heating wires between the conductive track and the glazing edge may reduce the amount of moisture wicked in to the glazing by the array of heating wires compared to cutting the array of heating wires at a glazing edge.
  • the array of heating of heating wires may be cut between the conductive track and the first busbar. Cutting the array of heating wires between the conductive track and the first busbar may reduce the incidence of "shorting" wires.
  • the tape is of polymer, preferably a polyester, polyamide or polyimide, more preferably an aromatic polyimide or poly(ethylene 2,6-napthalate) (PEN).
  • the tape may comprise PVB, preferably a plasticiser-free PVB.
  • a plasticiser-free PVB contains less 5% plasticiser, preferably less than 1% plasticiser.
  • a suitable plasticiser-free PVB is Mowital® or Trosifol® Thin Film, available from Kuraray Europe GmbH, Hattersheim, Germany.
  • Plasticiser-free PVB may be a preferred tape composition due to strong bonding to other components following lamination.
  • the tape is of a thickness in a range of 1 ⁇ m to 200 ⁇ m, preferably 12 ⁇ m to 130 ⁇ m, more preferably 20 ⁇ m to 80 ⁇ m, most preferably 22 ⁇ m to 55 ⁇ m.
  • a thicker tape will provide improved insulating properties and handling ability with reduced lamination ability, while a thinner tape will provide improved lamination ability with reduced insulating properties and handling ability.
  • the tape is of a width a least as great as that of the conductive track section to which it is attached.
  • the tape is of a width not more than 2 cm wider than that of the conductive track section to which it is attached.
  • a tape not more than 2 cm wider than the conductive track avoids lamination faults associated with the tape, and reduces cost.
  • the shrinkage of the tape is less than 0.4% following oven heating at 200 °C for 2 hours, more preferably less than 0.15%.
  • a tape with a high shrinkage property may have reduced lamination ability, and may not sufficiently insulate the conductive track from the array of heating wires.
  • the dielectric strength of the tape is greater than 80 kV/mm.
  • a peel strength of the tape from copper is greater than 1.2 N/cm.
  • the tape is preferably applied as a single piece. Alternatively the tape is applied in multiple sections.
  • the tape may be applied from a roll or applied as a pre-shaped layer.
  • the tape is preferably transparent. Alternatively the tape is opaque.
  • the tape may be tinted, coloured or dyed.
  • the laminated glazing may be formed by a lamination process using elevated temperature and, usually, high pressure e.g. in an autoclave.
  • the laminated glazing may be formed by methods involving a first step using a vacuum bag around the laid-up laminate, and wherein a vacuum is applied at approximately room temperature to de-gas the interlayer ply or plies.
  • a vacuum is applied at approximately room temperature to de-gas the interlayer ply or plies.
  • the first and second glass plies are heated to a temperature in the range 80 °C to 110 °C, such that the interlayer ply softens sufficiently to bond with the first and second glass plies.
  • the first and second glass plies are laminated together in an autoclave in the pressure range 6 bar to 14 bar and in the temperature range 120 °C to 150 °C.
  • electrically insulating describes the retarded or prevented flow of electrons between discrete physical elements.
  • Fig. 1 and Fig. 2 depict a first embodiment of the invention as applied to a glazing with an array of wires suitable for heating the glazing.
  • Fig. 1 shows a glazing 101 comprising a lower edge 111, an upper edge 112 and a side edge 113 wherein a first busbar 121 is proximate and substantially parallel to the lower edge 111 of the glazing 101.
  • a second busbar 122 is disposed in a position proximate to the upper edge 112 and is substantially parallel to the first busbar 121.
  • a first connector 141 and a second connector 142 are disposed at the lower edge 111 of the glazing 101.
  • the first busbar 121 is in electrical communication with the first electrical connector 141
  • the second busbar 122 is in electrical communication with the second electrical connector 142.
  • a conductive track 130 serves to provide electrical power to the second busbar 122 from the second connector 142.
  • the conductive track 130 comprises a first section 131 between and substantially parallel to the first busbar 121 and the lower edge 111, and a second section 132 in a position proximate and substantially parallel to the side edge 113.
  • An array 160 of heating wires is laid over the glazing 101.
  • the array 160 extends vertically over the first section 131 and the second busbar 122.
  • the first section 131 is furnished with a tape 150.
  • the tape 150 extends across the width of, and along the length of, the first section 131 sufficiently that the first section 131 is not in electrical communication with the array 160.
  • Fig. 2 is a cross-section of the glazing 101 on line A-A of Fig. 1 proximate to the glazing lower edge 111, comprising a first ply of glass 171 and a second ply of glass 172, with first interlayer ply 181 and second interlayer ply 182 between them. Between the interlayer plies 181 and 182 is the heating wire array 160. The first section 131 of the conductive track 130 and the first busbar 121 are embedded in the first interlayer ply 181. The first section 131 is furnished with the tape 150 such that the first section 131 is not in electrical communication with the heating wire array 160.
  • Fig. 2 depicts a heating wire array 160 that terminates inside the glazing 101. This may be advantageous, in order to reduce the likelihood of moisture wicking into the glazing 101. Alternatively the heating wire array 160 may terminate outside the glazing 101. In this case the tape 150 protects the conductive track 130 from moisture that may wick into the glazing 101.
  • heating of the first interlayer ply 181 may cause the first interlayer ply 181 to flow around the heating wire array 160.
  • the flow of the first interlayer ply 181 embeds the heating wire array 160 within first interlayer ply 181 and forms a second interlayer ply 182. This process may reduce the cost of the glazing unit.
  • Fig. 3 shows a glazing 301 comprising a lower edge 311, an upper edge 312 and a side edge 313 wherein a first busbar 321 is proximate and substantially parallel to the lower edge 311 of the glazing 301.
  • a second busbar 322 is disposed in a position proximate to the upper edge 312 and is substantially parallel to the first busbar 321.
  • a first connector 341 and a second connector 342 are disposed at the lower edge 311 of the glazing 301.
  • the first busbar 321 is in electrical communication with the first electrical connector 341, and the second busbar 322 is in electrical communication with the second electrical connector 342.
  • a first conductive track 330 serves to provide electrical power to the second busbar 322 from the second connector 342.
  • a first section 331 of the first conductive track 330 is positioned at an angle to the lower edge 311 of the glazing 301.
  • a second conductive track 332 serves to provide electrical power to the first busbar from the first connector 341.
  • An array 360 of heating wires is laid over the glazing 301.
  • the array 360 extends over the first busbar 321, the second busbar 322, the first section 331 of the first conductive track 330, and the second conductive track 332.
  • the first section 331 of the conductive track 330 is furnished with a first section of tape 351.
  • the first section of tape 351 extends across the width of, and along the length of, the first section 331 sufficiently that the first section 331 is not in electrical communication with the array 360.
  • the second conductive track 332 is furnished with a second section of tape 352.
  • the second section of tape 352 extends across the width of, and along the length of, the second conductive track 332 sufficiently that the second conductive track 332 is not in electrical communication with the array 360.

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  • Surface Heating Bodies (AREA)

Claims (12)

  1. Vitrage feuilleté (101, 301) pour un véhicule comprenant
    - un réseau (160, 360) de fils chauffants ;
    - une première barre collectrice (121, 321) et une seconde barre collectrice (122, 322) en connexion électrique avec le réseau (160, 360) de fils chauffants et disposées de sorte qu'une tension appliquée entre la première barre collectrice (121, 321) et la seconde barre collectrice (122, 322) permet le chauffage du vitrage (101, 301) ; et
    - un circuit conducteur (130, 330) électriquement connecté à la seconde barre collectrice (122, 322) pour fournir de l'énergie électrique à la seconde barre collectrice (122, 322) ;
    caractérisé en ce que
    - le réseau (160, 360) de fils chauffants s'étend sur la première barre collectrice et une première section (121, 321) du circuit conducteur (130, 330) ; et
    - une bande (150, 351) comprenant un polymère est positionnée entre la première section (131, 331) du circuit conducteur (130, 330) et le réseau (160, 360) de fils chauffants pour isoler électriquement la première section (131, 331) du circuit conducteur (130, 330) du réseau (160, 360) de fils chauffants.
  2. Vitrage feuilleté (101, 301) selon la revendication 1, comprenant de plus un connecteur (142) pour appliquer la tension au circuit conducteur (130, 330), dans lequel la première barre collectrice (121, 321) est disposée entre la seconde barre collectrice (122, 322) et le connecteur (141).
  3. Vitrage feuilleté (101, 301) selon l'une quelconque des revendications précédentes, dans lequel la bande (150, 351) comprend un polyester, un polyamide ou un polyimide.
  4. Vitrage feuilleté (101, 301) selon l'une quelconque des revendications précédentes, dans lequel la bande (150, 351) comprend un polyimide aromatique ou poly(éthylène 2,6-naphtalate) ou PVB exempt de plastifiant.
  5. Vitrage feuilleté (101, 301) selon l'une quelconque des revendications précédentes, dans lequel le retrait de la bande (150, 351) est inférieur à 0,4 % après un chauffage dans un four à 200°C pendant 2 heures.
  6. Vitrage feuilleté (101, 301) selon l'une quelconque des revendications précédentes, dans lequel la bande (150, 351) est d'une épaisseur de 1 µm à 200 µm, de préférence d'une épaisseur de 12 µm à 130 µm, encore mieux d'une épaisseur de 20 µm à 80 µm, bien mieux encore d'une épaisseur de 22 µm à 55 µm.
  7. Vitrage feuilleté (101, 301) selon l'une quelconque des revendications précédentes, dans lequel la bande (150, 351) est d'une largeur d'au plus 2 cm plus large que la section de circuit conducteur à laquelle elle est fixée.
  8. Vitrage feuilleté (101, 301) selon l'une quelconque des revendications précédentes, dans lequel le circuit conducteur se trouve entre la première barre collectrice et le bord inférieur du vitrage.
  9. Procédé pour la fabrication d'un vitrage feuilleté (101, 301) selon la revendication 1, comprenant les étapes de :
    a. fourniture d'un premier pli de matériau de couche intermédiaire (181) ;
    b. fourniture d'un réseau (160, 360) de fils chauffants sur le pli de matériau de couche intermédiaire (181) ;
    c. fourniture d'une première barre collectrice (121, 321) et d'une seconde barre collectrice (122, 322) en connexion électrique avec le réseau (160, 360) de fils chauffants et disposées de sorte qu'une tension appliquée entre la première barre collectrice (121, 321) et la seconde barre collectrice (122, 322) permet le chauffage du vitrage (101, 301) ;
    d. fourniture d'un circuit conducteur (130, 330) électriquement connecté à la seconde barre collectrice (122, 322) pour fournir de l'énergie électrique à la seconde barre collectrice (122, 322) ;
    e. disposition du pli de matériau de couche intermédiaire (181) entre un premier pli rigide (171) et un second pli rigide (172), dans lequel le circuit conducteur (130, 330), les première et seconde barres collectrices (121, 321 ; 122, 322), et le réseau (160, 360) de fils chauffants se trouvent entre le pli de matériau de couche intermédiaire (181) et le premier pli rigide (171) ;
    f. formation d'un vitrage feuilleté (101, 301),
    caractérisé en ce qu'avant la formation du vitrage feuilleté (101, 301), le réseau (160, 360) de fils chauffants s'étend sur la première barre collectrice (121, 321) et une première section (131, 331) du circuit conducteur (130, 330), et le circuit conducteur (130, 330) est muni d'une bande (150, 351) comprenant un polymère positionné entre la première section (131, 331) du circuit conducteur (130, 330) et le réseau (160, 360) de fils chauffants pour isoler la première section (131, 331) du circuit conducteur (130, 330) du réseau (160, 360) de fils chauffants.
  10. Procédé selon la revendication 9, dans lequel la bande (150, 351) comprend un polyester, un polyamide ou un polyimide.
  11. Procédé selon la revendication 9, dans lequel la bande (150, 351) comprend un polyimide aromatique ou poly(éthylène 2,6-naphtalate) ou PVB exempt de plastifiant.
  12. Procédé selon la revendication 9, comprenant de plus une étape de découpe du réseau (160, 360) de fils chauffants, de préférence sur un bord de vitrage (111, 112).
EP17807923.2A 2016-11-29 2017-11-28 Vitrage comprenant un réseau de fils chauffants, et son procédé de fabrication Active EP3549389B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB1620244.2A GB201620244D0 (en) 2016-11-29 2016-11-29 Glazing comprising a heating element and a method of producing the same
PCT/GB2017/053568 WO2018100348A1 (fr) 2016-11-29 2017-11-28 Vitrage comprenant un réseau de fils chauffants, et son procédé de fabrication

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EP3549389B1 true EP3549389B1 (fr) 2021-02-24

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11773011B1 (en) 2022-07-08 2023-10-03 Agc Automotive Americas Co. Glass assembly including a conductive feature and method of manufacturing thereof
US12071365B2 (en) 2022-07-08 2024-08-27 Agc Automotive Americas Co. Glass assembly including a performance-enhancing feature and method of manufacturing thereof
US12090729B2 (en) 2022-07-08 2024-09-17 Agc Automotive Americas Co. Glass assembly including an opaque boundary feature and method of manufacturing thereof

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3947618A (en) * 1972-10-31 1976-03-30 General Electric Company Electrically heated transparent panel
US5089687A (en) * 1990-10-02 1992-02-18 Ppg Industries, Inc. Bus bar jumper for heatable windshield
US7180031B1 (en) * 2005-09-19 2007-02-20 Automotive Components Holdings, Llc Electrical connection in glazing operations

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11773011B1 (en) 2022-07-08 2023-10-03 Agc Automotive Americas Co. Glass assembly including a conductive feature and method of manufacturing thereof
US12071365B2 (en) 2022-07-08 2024-08-27 Agc Automotive Americas Co. Glass assembly including a performance-enhancing feature and method of manufacturing thereof
US12090729B2 (en) 2022-07-08 2024-09-17 Agc Automotive Americas Co. Glass assembly including an opaque boundary feature and method of manufacturing thereof

Also Published As

Publication number Publication date
EP3549389A1 (fr) 2019-10-09
WO2018100348A1 (fr) 2018-06-07
GB201620244D0 (en) 2017-01-11

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