• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to a method of printing enamel on a glass sheet constituting a laminated glazing used in the automotive field and comprising a stack of functional thin layers sensitive to scratching. The method according to the invention makes it possible to deposit an enamel layer on a glass sheet coated with a stack of thin layers.
    公开号:FR3050730A1
    申请号:FR1653735
    申请日:2016-04-27
    公开日:2017-11-03
    发明作者:Camille Dassonville；Dieter Kleyer
    申请人:Saint Gobain Glass France SAS；
    IPC主号:
    专利说明:

    METHOD FOR PRINTING EMAIL FOR LAYERED SHEET GLAZING
    FUNCTIONAL
    The present invention relates to a method of printing enamel on a glass sheet constituting a laminated glazing unit and comprising a stack of functional thin layers sensitive to scratchability, used in particular in the automotive field.
    Automotive glazings, in particular used as a windshield are laminated glazing consisting of two sheets of glass associated with an intermediate sheet of thermoplastic polymer placed between the two sheets of glass. Each glass sheet thus has a side facing said intermediate sheet. Conventionally, for a glazing unit mounted in a motor vehicle, we speak of the faces 1 to 4 of a laminated glazing using the following conventions. The glass sheet in contact with the outside of the vehicle, still sometimes called the first sheet of glass, has a face 1 and a face 2. The face 1 is the outward facing one, while the face 2 is the facing one. the interlayer sheet. The other sheet of glass, or second sheet of glass, is in contact with the inside of the vehicle and has a face 3 and a face 4. The face 3 is that facing the intermediate sheet while the face 4 is that directed inwards.
    Automotive windows very often have opaque enamel strips that have a dual role: they both preserve the integrity of the adhesive under the glazing when the latter is mounted by gluing in the bodywork bay screw to screw solar radiation and particularly ultraviolet radiation and also to hide the connection elements, for example electrical type, which are located at the edges of the faces of the glazing. These strips may be peripheral or more central if they are for example intended to hide the connection elements of the mirrors. These enamel strips are usually deposited on the glass sheets by screen printing processes. On the other hand, many automotive windows are functionalized glazing in the sense that they allow solar and / or thermal control, or for example an electromagnetic shielding. In order to obtain these functionalities in the glazings, one of the constituent glass sheets of the glazing is coated with a stack of several thin layers, some of which are functional metallic layers, in particular based on silver and others on layers of dielectric material having very high resistivities of the order of 10® to 10 ^ ® Qm These stacks are very often fragile in the sense that they are easily scratched and damaging. By scratching the coating, the metal layers may be exposed and thus constitute entry points for corrosion problems. The stacks must therefore be deposited on the faces considered internal and therefore the least exposed of a laminated glazing, that is to say on the face 2 of the first glass sheet or the face 3 of the second sheet of glass. glass. In manufacturing processes of such laminated glasses, when the stacks are sensitive to scratching, the enamel tape is deposited on the glass sheet which is not coated with the stack. Thus, if the stack of functional layers is positioned on the first sheet of glass, the enamel band will be applied to the second sheet or vice versa. Most often, the stack is positioned in face 3 and the enamel band is therefore in front 1 or 2. In this way, the peripheral enamel band can be applied by conventional screen printing techniques, without worrying of any coating since it is deposited on the uncoated sheet. In most current functionalized automotive glazings, the stack of layers is therefore located on the face 3 and the enamel band is on the face 2, which makes it possible to mask the start of the stack of layers. However, in this configuration, the plastic elements such as mirrors or rain sensor supports are glued on the face 4, so directly on the glass, that is to say on a relatively smooth surface which can present difficulties at the time of the collage. Some manufacturers seek to avoid sticking these elements directly on the glass and wish to be able to stick them on an enamel tape, which thus facilitate bonding while keeping the UV protection of the glue and masking of the connectors. It is in this context that the present invention provides a method of manufacturing a laminated glass in which the enamel band is positioned on the glass sheet on which the stack of functional layers has been deposited. The method according to the invention advantageously makes it possible to obtain a laminated glazing unit in which the stack of functional layers is positioned in face 3 and the enamel strip is in front 4.
    The method according to the present invention is a method for manufacturing a laminated glass for a motor vehicle comprising at least a first sheet of glass in contact with the outside of the vehicle, a second sheet of glass in contact with the interior of the vehicle, and a thermoplastic interlayer positioned between the two glass sheets, at least one of said sheets being provided with a stack of thin layers having a plurality of scratch-sensitive functional layers, said method comprising the steps of: a. depositing the stack of thin layers on one side of the first or second sheet of glass, b. positioning the coated face of the stack of thin layers resting on a support, c. depositing a liquid enamel, the composition of which has a viscosity of less than 10 Pa.s, on an area of the uncoated side of the glass sheet used in step a) d. heating the glass sheets for bending or forming to temperatures between 500 and 650 ° C, e. placing the thermoplastic interlayer between the first and second sheets of glass, f. vacuum degassing of the assembly, then g. sealing and autoclaving of the whole.
    For the purposes of the present invention, the first sheet of glass is the one whose side 1 is in contact with the outside of the vehicle and the second sheet of glass is in contact with the vehicle interior (passenger side).
    Preferably, the stack of thin functional layers is deposited on the face of the second glass sheet which will be, after manufacture, in contact with the thermoplastic interlayer. The stack is therefore advantageously in face 3. Step a) of the process is carried out using the usual deposition techniques for the deposition of thin functional layers.
    We can mention the magnetron sputtering commonly used. Preferably, at least one of the thin layers of the stack is a silver layer. Step b) consists of positioning the glass sheet coated with the thin-film stack in support on a support so that the face in contact with the support is the face on which the deposition of the thin-film stack functional was performed during step a). Advantageously, this support is a suction pad that supports the glass sheet without damaging the stack of thin layers sensitive to scratching. According to another embodiment, the support on the support can be achieved by an automated robot having support means of the suction cup type. Stage c) of the process corresponds to the step of depositing enamel on the same glass sheet as that on which the stack of thin functional layers has been deposited, but on the opposite side to that coated with the stack of thin layers. 3 the stack is advantageously in front 3, step b) consists in depositing the enamel in face 4 of the second glass sheet. Enamel deposition is done by spraying or curtain or roll coating. Preferably, the deposition of the enamel is carried out by brush or brush coating, fed continuously by the enamel composition. The shape, the size and the number of layers of enamel that one wishes to deposit depend on the use for which the glazing is intended. Conventionally, the deposit is made on the periphery of the glazing in the form of a band of variable width but sufficient to hide the elements located under the glazing such as electrical connection elements and / or heating. The viscosity of the enamel composition that is deposited on the glazing must be less than 10 Pa.s to be applied by brush or brush coating. Bi effect, if the viscosity is too high, the deposition technique used does not allow to obtain a homogeneous deposit. Even more preferably, the viscosity of the enamel composition applied during step c) is between 2 and 5 Pa.s. If the viscosity of the enamel composition is too low, for example less than 1 Pa.s, the product to be applied is too liquid and may leak during transport of the glazing between the different steps of the process.
    Any type of enamel composition known for automotive application; Most often black color, can be used in the process according to the present invention provided that its viscosity is compatible with the deposit method used.
    This c) enamel deposition step is preferably carried out by at least one automated robot applicator, provided with at least one brush or brush-type feed head fed continuously by the enamel composition. Instead of a brush, it is possible to equip the feed head with a felt or a foam also to achieve the deposition of the enamel. The applicator robot is also advantageously provided with means for maintaining the coated face bearing on the support. It can thus be the same automated robot as that used in step b) and having at least two different arms, one for the support and the other for the application of enamel. The enamel deposition step c) can also be carried out by one or more robots provided with at least two feed heads to perform simultaneously the printing of the enamel on the entire glazing, each of the heads of power supplies depositing on a part of the glazing. This configuration makes it possible to use robots whose arms are smaller. At the end of step c), one of the glass sheets thus has on one side a stack of thin functional layers and on the other side an enamel band.
    The two constituent sheets of the glazing then undergo a heating step, for bending or forming, up to a temperature between 500 ° C and 650 ° C. This temperature corresponds to the softening point of the glass sheet which can then be curved.
    The glass sheets once curved can thus be directly assembled, without the need to perform a specific step of drying and pre-cooking the enamel deposited on the glass sheet having the stack of thin functional layers. Drying and baking are thus directly carried out during the bending step of the laminated glazing.
    Steps e) to g) of the method according to the invention correspond to the usual steps of assembling a laminated glass. The two sheets of glass are positioned so that the thermoplastic interlayer is placed between the two sheets of glass. The face of the glass sheet or sheets which comprises the stack of thin layers is that facing the thermoplastic interlayer (face 2 and / or face 3). The whole is degassed under vacuum before being sealed and autoclaved. The degassing, for example, takes place by placing all the laminated glazing in a silicone envelope, inside which the air is evacuated by a vacuum pump. In step g), the assembly placed in the vacuum bag is heated to a temperature of about 80 ° C, and the final adhesion of the assembly takes place during the autoclaving phase. The glazing, extracted from the vacuum bag, undergoes, for example, a hydrostatic pressure cycle of 12 bars and a temperature of 135 ° C., for a period of approximately 90 minutes to eliminate all of the remaining air.
    The present invention also relates to a laminated glazing unit comprising at least two glass sheets and a thermoplastic interlayer capable of being obtained by the process described above. The glazing according to the invention comprises a stack of functional layers positioned on the side facing the thermoplastic interlayer of at least one of the glass sheets and at least one enamel strip on the other side of the same glass sheet . Thus, by using the terminologies defined above, the coating is on the face 3 and the enamel on the face 4. The elements possibly necessary for the connection of the thin functional layers, for example the collector strips, also called bus bars (or "busbar >> according to the Anglosaxon terminology commonly used), are also positioned on the face 3 of the glazing. The glazing according to the present invention is such that it becomes possible to glue elements located inside the passenger compartment of the vehicle directly on the enamel which is on the face turned towards the inside ( face 4). The thermoplastic interlayer may for example be a polyvinyl butyral, polyurethane, ethylene vinyl acetate copolymer, polyvinyl chloride, silicone or resin film. The stack of functional thin layers can give the glazing anti-reflective, semi-reflective, conductive, and / or solar control properties etc.
    The glazing according to the present invention may also comprise an enamel strip on the face of the glass sheet which does not comprise the stack of thin functional layers and which is turned towards the thermoplastic interlayer. Thus, the face 2 of the glazing may comprise an enamel strip intended to hide the start of the stack of thin layers. This enamel tape can be deposited by spraying or curtain or roll coating.
    The figures below illustrate the invention without limiting its scope.
    Figure 1 is a sectional view of a glazing according to the present invention. This glazing comprises two F1 and F2 glass sheets. F1 sheet has a first face (1) intended to be turned towards the outside of the vehicle and a second face (2) facing the thermoplastic interlayer (5). The second sheet F2 has a face (3) facing the thermoplastic interlayer (5) and a face (4) intended to be turned towards the interior of the passenger compartment of the vehicle. The stack of thin functional layers represented by the reference (6) is positioned on the face (3) of the glazing. The method according to the invention makes it possible to deposit an enamel band, in the present case peripheral, represented by the reference (7) on the face (4) of the sheet F2. On the glazing shown in FIG. 1, another enamel strip (8) has been deposited on the periphery of the face (2) of the glass sheet (F1) to conceal the landing zones (9) situated on the edge of the stack of thin layers.
    FIG. 2 represents an embodiment of the method according to the invention. The sheet of glass F2 comprising the stack of functional thin layers (6) deposited on the face (3) is held in abutment by an arm (11) of the robot (10) for supporting the glass sheet F2 via a support (12) provided with suction cups (13). An arm (14) of an applicator robot (15) is equipped with an application head (16) fed continuously by the enamel composition to be deposited on the face (4).
    权利要求:
    Claims (8)
    [1" id="c-fr-0001]
    A method of manufacturing a laminated glass for a motor vehicle comprising at least a first sheet of glass in contact with the outside of the vehicle, a second sheet of glass in contact with the interior of the vehicle, and a thermoplastic interlayer positioned between the two sheets of glass, at least one of said glass sheets being provided with a stack of thin layers comprising a plurality of scratch-sensitive functional layers, said method comprising the following steps: a. depositing the stack of thin layers on one side of the first or second sheet of glass, b. face positioning coated with the stack resting on a support, c. depositing a liquid enamel, the composition of which has a viscosity of less than 10 Pa.s, on an area of the uncoated side of the glass sheet used in step a), d. heating the glass sheets for bending or forming to temperatures between 500 and 650 ° C, e. placing the thermoplastic interlayer between the first and second sheets of glass, so that the coated face of the stack of thin layers is facing said interlayer, f. vacuum degassing of the assembly, then g. sealing and autoclaving of the whole.
    [2" id="c-fr-0002]
    2. Method according to claim 1 characterized in that step c) is performed by at least one automated robot applicator provided with at least one feed head of the brush or brush type fed continuously by the enamel composition.
    [3" id="c-fr-0003]
    3. Method according to claim 2 characterized in that said robot is also provided with means for maintaining the coated face bearing on the support.
    [4" id="c-fr-0004]
    4. Method according to one of claims 1 to 3 characterized in that step c) is carried out by one or more robots provided with au me ns two feed heads to simultaneously perform the printing of enamel on the entire glazing, each of the feed heads performing the deposit on a portion of the glazing.
    [5" id="c-fr-0005]
    5. Method according to one of the preceding claims characterized in that the enamel deposited in step c) is a liquid composition whose viscosity is between 2 and 5 Pa.
    [6" id="c-fr-0006]
    6. Method according to one of the preceding claims characterized in that the stack of thin functional layers deposited in step a) comprises at least one layer of silver.
    [7" id="c-fr-0007]
    7. laminated glass comprising at least two sheets of glass and a thermoplastic interlayer capable of being obtained by the method according to one of the preceding claims characterized in that it comprises a stack of functional layers positioned on the side facing the thermoplastic interlayer of at least one of the glass sheets and at least one enamel strip on the other side of the same glass sheet.
    [8" id="c-fr-0008]
    8. Glazing according to claim 7 characterized in that it has anti-reflective properties, solar control, semi-reflective, and / or conductive.
    类似技术:
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    EP3723982A1|2020-10-21|Heating glazing made of a structural plastic material
    FR3063676A1|2018-09-14|GLAZING FOR A VEHICLE COMPRISING A HYBRID MASKING AREA
    EP2046610A1|2009-04-15|Capacitive rain detector
    同族专利:
    公开号 | 公开日
    WO2017187054A1|2017-11-02|
    PT3448819T|2020-04-22|
    FR3050730B1|2018-04-13|
    BR112018069590A2|2019-01-22|
    RU2734794C2|2020-10-23|
    ES2783883T3|2020-09-18|
    CN108025961A|2018-05-11|
    MA44765B1|2020-06-30|
    RU2018141387A3|2020-08-24|
    US20190091972A1|2019-03-28|
    KR20190003604A|2019-01-09|
    CN108025961B|2021-02-19|
    MX2018013078A|2019-01-24|
    CA3020218A1|2017-11-02|
    PL3448819T3|2020-06-29|
    JP2019520290A|2019-07-18|
    RU2018141387A|2020-05-27|
    EP3448819B1|2020-03-04|
    US11207875B2|2021-12-28|
    JP6944468B2|2021-10-06|
    EP3448819A1|2019-03-06|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    WO2007080186A1|2006-01-16|2007-07-19|Agc Flat Glass Europe Sa|Glazing with an enamelled pattern|
    WO2013189798A1|2012-06-19|2013-12-27|Agc Glass Europe|Vehicle roof|
    WO2014174308A1|2013-04-25|2014-10-30|Pilkington Group Limited|Laminated glazing|
    DE1680001C2|1968-01-29|1974-06-12|Saint-Gobain, Neuilly-Sur-Seine |Windshield for automobiles|
    JPS5928526U|1982-08-17|1984-02-22|
    EP0106628B1|1982-10-08|1987-01-07|Johnson Matthey Public Limited Company|Printing ink|
    US4959090A|1988-09-28|1990-09-25|Ciba-Geigy Corporation|Glass enamel coating compositions|
    ZW13689A1|1988-11-19|1989-12-12|Johnson Matthey Plc|Glass composition for use in glazes or enamels|
    US4954153A|1989-07-03|1990-09-04|Ppg Industries, Inc.|Processing glass sheets with ceramic enamel bands|
    FR2652037B1|1989-09-18|1992-04-03|Saint Gobain Vitrage Int|HEATING SHEET GLAZING.|
    JPH0717407B2|1989-10-09|1995-03-01|旭硝子株式会社|Method for producing glass with functional thin film|
    US5431966A|1991-01-25|1995-07-11|Saint-Gobain Vitrage|Process for enamelling a glass substrate|
    US5370905A|1992-03-23|1994-12-06|Nordson Corporation|Method of applying priming coating materials onto glass elements of vehicles|
    FR2693558B1|1992-07-09|1994-08-19|Commissariat Energie Atomique|Method for manufacturing thin layers having optical properties.|
    JPH0731910A|1993-07-20|1995-02-03|Nippon Sheet Glass Co Ltd|Method for coating sheet glass coating solution and device therefor|
    DE19718303C1|1997-04-30|1998-07-16|Ver Glaswerke Gmbh|Multicoloured decoration of glass pane|
    US6103011A|1998-05-20|2000-08-15|T. L. International, Inc.|Brush applicator|
    JP4277376B2|1999-08-16|2009-06-10|旭硝子株式会社|Electric heating glass and its manufacturing method|
    US6598426B2|2001-04-11|2003-07-29|Guardian Industries Corp.|Method of making a vehicle window with opaque layer|
    JP3849533B2|2002-01-25|2006-11-22|日本板硝子株式会社|Laminated glass for windshield|
    EP1348673A1|2002-03-25|2003-10-01|Glaverbel|Method of forming a coating film|
    US7125462B2|2002-06-18|2006-10-24|Centre Luxembourgeois De Recherches Pour Le Verre Et Al Ceramique S.A. |Method of making vehicle windshield using coating mask|
    BE1015700A3|2003-10-03|2005-07-05|Glaverbel|Bending glass laminated.|
    GB0401918D0|2004-01-30|2004-03-03|Johnson Matthey Plc|Improved glass compositions|
    DE102005016087A1|2005-04-08|2006-10-12|GM Global Technology Operations, Inc., Detroit|Motor vehicle and laminated glass pane for it|
    US7832233B2|2005-05-18|2010-11-16|Ferro Corporation|Method of making staged burnout enamels for second surface firing of multilayer glass structures|
    JP2008057274A|2006-09-01|2008-03-13|Tostem Corp|Decorative glass or window attached with the same|
    GB0720268D0|2007-10-17|2007-11-28|Pilkington Group Ltd|Glazing|
    US8895899B2|2007-10-26|2014-11-25|Philippe Marquet|Glazing comprising a network of conducting wires|
    CN101939114A|2008-02-08|2011-01-05|中央硝子株式会社|Device and method for applying application liquid|
    BE1020191A3|2011-08-12|2013-06-04|Agc Glass Europe|AUTOMOTIVE GLAZING WITH ENAMEL PATTERNS.|
    JP6223425B2|2012-04-24|2017-11-01|フエロ コーポレーション|Heavy metal-free, ion-exchangeable glass enamel|
    FR2994190B1|2012-07-31|2014-08-08|Saint Gobain|COLORED SERIGRAPIABLE COMPOSITION ON A SHEET OF POLYMERIC MATERIAL|
    PL3022164T3|2013-07-17|2019-03-29|Ferro Corporation|Method of forming durable glass enamel|CN109986934A|2017-12-29|2019-07-09|法国圣戈班玻璃公司|Vehicle windscreen and its preparation process with two dimensional code|
    US10981358B2|2018-04-03|2021-04-20|AGC Inc.|Laminated glass|
    FR3111290A1|2020-06-16|2021-12-17|Saint-Gobain Glass France|Laminated glazing|
    法律状态:
    2017-04-21| PLFP| Fee payment|Year of fee payment: 2 |
    2017-11-03| PLSC| Publication of the preliminary search report|Effective date: 20171103 |
    2018-04-25| PLFP| Fee payment|Year of fee payment: 3 |
    2019-04-26| PLFP| Fee payment|Year of fee payment: 4 |
    2020-04-29| PLFP| Fee payment|Year of fee payment: 5 |
    2021-04-30| PLFP| Fee payment|Year of fee payment: 6 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1653735A|FR3050730B1|2016-04-27|2016-04-27|ENAMEL PRINTING METHOD FOR FUNCTIONAL LAYERED SHEET GLAZING|
    FR1653735|2016-04-27|FR1653735A| FR3050730B1|2016-04-27|2016-04-27|ENAMEL PRINTING METHOD FOR FUNCTIONAL LAYERED SHEET GLAZING|
    CA3020218A| CA3020218A1|2016-04-27|2017-04-20|Enamel printing method for laminated glazing having functional layers|
    BR112018069590A| BR112018069590A2|2016-04-27|2017-04-20|laminate glaze printing process with functional layers|
    EP17725296.2A| EP3448819B1|2016-04-27|2017-04-20|Enamel printing method for laminated glazing having functional layers|
    KR1020187033850A| KR20190003604A|2016-04-27|2017-04-20|Enamel printing method for laminate glazing with functional layer|
    MA44765A| MA44765B1|2016-04-27|2017-04-20|Enamel printing process for laminated glass with functional layers.|
    MX2018013078A| MX2018013078A|2016-04-27|2017-04-20|Enamel printing method for laminated glazing having functional layers.|
    PCT/FR2017/050938| WO2017187054A1|2016-04-27|2017-04-20|Enamel printing method for laminated glazing having functional layers|
    JP2018556322A| JP6944468B2|2016-04-27|2017-04-20|Enamel printing method for laminated glazing with functional layers|
    PT177252962T| PT3448819T|2016-04-27|2017-04-20|Enamel printing method for laminated glazing having functional layers|
    PL17725296T| PL3448819T3|2016-04-27|2017-04-20|Enamel printing method for laminated glazing having functional layers|
    RU2018141387A| RU2734794C2|2016-04-27|2017-04-20|Method of enamel printing for laminated glazing, having functional layers|
    US16/096,934| US11207875B2|2016-04-27|2017-04-20|Enamel printing process for a laminated glazing having functional layers|
    ES17725296T| ES2783883T3|2016-04-27|2017-04-20|Enamel impression procedure for laminated glazing with functional layers|
    CN201780001044.8A| CN108025961B|2016-04-27|2017-04-20|Enamel printing method for laminated glazing with functional layer|
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