METHOD TO PRODUCE A COMPOSITE GLASS WITH A FUNCTIONAL COATING PROTECTED AGAINST CORROSION, DEVICE TO

专利摘要:
the invention relates to a method for producing a composite glazing (100) having a functional coating (3), wherein (a) at least one functional coating (3) is applied to at least a portion of a surface (iii ) of a base glazing (1?); (b) a first glazing (1) is cut from the base glazing (1') and at least one region free from a frame-shaped circumferential coating (9.1, 9.2) is introduced to the functional coating (3) so that the region interior (11) is not bordering on a side edge (6) of the first pane (1); (c) the surface (iii) of the first glazing (1) is connected to the functional coating (3) of a surface (ii) of a second glazing (2) by means of a thermoplastic intermediate layer (4). the invention further relates to a device (30) for carrying out the method according to the invention.
公开号:BR112017011347B1
申请号:R112017011347-3
申请日:2015-12-02
公开日:2021-06-29
发明作者:Valentin Schulz；Irène CUCCHI
申请人:Saint-Gobain Glass France；
IPC主号:

专利说明:

[0001] The invention relates to a method for producing a composite glazing with a functional coating protected against corrosion, as well as a device for carrying out the method according to the invention.
[0002] Composite glazing comprising two or more polymeric or glass glazing is used in many ways in buildings, furniture or in transportation means for moving on land, in air or in water, in particular, in motor vehicles, for example , such as a windshield, rear window, side window and/or sunroof.
[0003] In general, a functional coating or a plurality of functional coatings, which have, for example, infrared reflection properties, anti-reflection properties, or low-E properties, or are electrically heatable by applying a voltage, are arranged on individual sides of the panes. Such composite glazings are known, for example, from US 2004/0146645 A1, US 2005/0238861 A1 or WO 2014/060203 A1 . Methods for processing and, in particular, for removing coating from glass panes with functional coatings are known, for example, from documents DE 34 03 682 C1, DE 10 2008 058 310 B3, DE 10 2011 075 328 A1, or EP 0 517 176 A1.
[0004] Furthermore, composite glazing that has an electrical heating layer produced from a transparent electrically conductive coating on an interior surface of one of the individual glazings are known. By means of an external voltage source, an electrical current that heats the cladding, and hence the glazing, can be conducted through the electrically conductive cladding.
[0005] The documents WO 2003/024155 A2, US 2007/0082219 A1, US 2007/0020465 A1 and WO2012/052315 A1 disclose, for example, such electrically conductive, heatable coating based on a metal and in particular with base in a layer structure of a silver-containing layer or a plurality of silver-containing layers.
[0006] Such functional coatings and, in particular, electrically conductive metal-based coatings are quite susceptible to corrosion and must therefore be hermetically sealed and protected from moisture. For this purpose, a functional inner liner has the liner removed along a peripheral frame-shaped region of the composite glazing. The width of the region in the shape of a peripheral frame is usually from 5 mm to 20 mm and ends at the lateral edge of the composite glazing. Typically, coating removal is carried out in a complicated and time-consuming process by mechanical abrasion, for example by grinding with a grinding wheel. The uncoated region is hermetically sealed within the composite glazing by the thermoplastic intermediate layer and/or an acrylic adhesive as a vapor diffusion barrier. Through the vapor diffusion barrier, the corrosion-sensitive functional coating is protected from atmospheric moisture and oxygen. If the composite glazing is supplied as a motor vehicle glazing, for example as an electrically heatable windshield, the region free of peripheral coating also affects electrical insulation between the voltage-carrying coating and the vehicle body.
[0007] The objective of the present invention is to provide an improved method to produce a composite glazing with a functional coating protected against corrosion that can be carried out simply, quickly and, consequently, economical.
[0008] The purpose of the present invention is achieved according to the invention by a method according to claim 1. Preferred embodiments emerge from the sub-claims.
[0009] The method according to the invention for producing a composite glazing with a functional coating comprises at least the following steps: (a) Applying a functional coating on at least part of a surface (III) of a base glazing, (b) Cutting a first glazing from the base glazing using a cutting tool and inserting at least one uncoated region into the functional coating using a coating removal tool, wherein the uncoated region surrounds completely an inner region of the functional coating, (c) Bonding the surface (III) of the first glazing with the functional coating to a surface (II) of a second glazing by means of a thermoplastic intermediate layer.
[0010] In other words, the region free of coating is arranged in a frame shape peripherally around the inner region and the inner region is not adjacent to a side edge of the first pane.
[0011] For the method according to the invention, it is particularly important that the cutting of the first glazing and the removal of coating from the region free from coating are carried out in one process step and, consequently, simultaneously.
[0012] In prior art methods, first, the first glazing is cut from the base glazing and, in a second process step, a wide area has edge coating removed by mechanical abrasion. This second process step is very time-consuming and requires its own process station and is therefore very expensive.
[0013] In the method according to the invention, a process station is eliminated as a result of simultaneous cutting and coating removal and the process is thereby accelerated. It is particularly advantageous that the coating removal tool and the cutting tool are coordinated with each other: Thereby, the coating removal process must be adapted in its speed to the movement speed of the cutting tool. Particularly good results were obtained for a cutting wheel, preferably produced from a carbide as a cutting tool and a laser beam as a coating removal tool. In particular, through the proper choice of laser power and the width of the removed coating region, a desired speed adaptation can easily be achieved.
[0014] The cutting tools and preferably the cutting wheel or diamond tip are advantageously cooled with a coolant. The coolant is preferably a known cutting oil common on the market. Cooling fluid is typically introduced, injected or sprayed between the cutting edge or cutting tip of the cutting tool and the surface of the base glazing and wets a region of the surface of the base glazing.
[0015] In an advantageous embodiment of the method according to the invention, in step (b), the region free of coating is designed so that the inner region is partially or completely surrounded by at least one outer region of the functional coating and is separated from it by the region free of coating.
[0016] Hereinafter, "base pane" refers to a pane that is larger in dimensions than the first pane and from which the first pane is formed after being cut.
[0017] Cutting the first pane of the base pane in step (b) may also consist of cutting or carving a surface of the base pane, wherein the first pane is subsequently separated from the base pane, for example , by a light mechanical load. With brittle materials such as glass, this can be done particularly accurately and quickly.
[0018] The application of the functional coating in process step (a) can be carried out by methods known per se, preferably by magnetic field enhanced sputtering. This is particularly advantageous over the simple, fast, economical and uniform coating of the first glazing. However, the functional coating can also be applied, for example, by vapor deposition, chemical vapor deposition (CVD), plasma enhanced chemical vapor deposition (PECVD) or by wet chemical methods.
[0019] The first glazing can be subjected to a temperature treatment after the process step (a) and/or the process step (b). The first glazing with the functional coating is heated to a temperature of at least 200°C, preferably at least 300°C. Temperature treatment can serve to increase transmittance and/or to reduce the blade strength of the functional coating.
[0020] The first glazing can be bent after process step (a) or after process step (b), typically at a temperature of 500 °C to 700 °C. Since it is technically simpler to coat a flat pane, this approach is advantageous if the first pane is bent. However, alternatively, the base glazing can also be bent prior to process step (a), for example when the functional coating is not suitable to support a bending process without damage.
[0021] The coating removal of individual coating-free regions in the functional coating in process step (b) should preferably be performed by a laser beam. Methods for standardizing thin metal films are known, for example, from documents in EP 2 200 097 A1 or EP 2 139 049 A1.
[0022] The introduction of energy to remove coating from the region free from coating can be carried out in accordance with the invention with any suitable laser. Particularly preferably, YAG lasers are used, in particular Nd:YAG lasers (neodymium-doped yttrium-aluminum-garnet solid state lasers) with a wavelength in the range of 1,047 to 1,079 nm (nanometers), preferably , 1064 nm. Additionally preferred is a Yb:YAG laser (yttrium-aluminum-garne solid state laser doped with ytterbium) with a wavelength in the range of 1030 nm. In beneficial enhancements, both laser types can be used with frequency doubling (doubled) or frequency tripling (triple).
[0023] In an alternative embodiment according to the invention, YAG lasers are used to remove coating from the functional coating, in particular with a high pulse repetition frequency in the pico- and nanosecond range. The coating removal quality is very good and the functional coating is substantially completely removed. In particular, with the use of a glass substrate as a first glazing, the surface is free from microcracks and has low optical dispersion as well as high strength in the two-point bending test.
[0024] Alternatively, particularly suitable for removing coating from the functional coating are CO2 lasers, in particular CO2 lasers with a wavelength in the range of 9.2 µm to 11.4 µm, preferably of, 10.6 µm or a frequency doubled CO2 laser. It can be a pulsed CO2 laser or a continuous wave CO2 laser (cw laser).
[0025] To carry out the method according to the invention, with the use of a CO2 laser, in particular, in relation to the coating removal speed, an average laser power PAV of less than 500 W, preferably of less than 300 W, particularly preferably less than 200 W is suitable. With regard to the coating removal quality, an average laser power of less than 100 W, which is conducive to the formation of good coating removal quality, is preferred; but the coating removal speed therein is low.
[0026] To carry out the method according to the invention, with the use of a pulsed CO2 laser, an average frep laser pulse repetition frequency of 5 to 12 kHz (kilohertz) is preferred, in particular a frequency of 8 to 10 kHz average frep laser pulse repetition. Furthermore, with the use of a pulsed CO2 laser, a laser pulse duration tp of 0.1 to 500 µs (microseconds) is preferred, in particular a laser pulse duration tp of 1 to 100 µs.
[0027] Furthermore, an excimer laser, in particular an F2 laser (157 nm), an ArF laser (193 nm), a KrF laser (248 nm) or an Ar laser (351 nm) is preferred. Such types of lasers can, depending on the modality of the invention, be used as pulsed or continuous wave lasers.
[0028] In an advantageous embodiment of the method according to the invention, in step (b), a laser beam is guided directly on the coated surface III of the first pane for laser ablation. This has the advantage that a cutting tool for cutting the first glazing out of a larger base glazing can be arranged close to the laser and can be simultaneously moved therein. This significantly simplifies the device for producing the composite glazing according to the invention.
[0029] In an advantageous alternative embodiment of the method according to the invention, in step (b), for laser ablation, a laser beam is launched into the first pane through the surface that faces away from the coated surface III of the first pane and thus guided through the first pane into the functional coating. This has the particular advantage that material that has been ablated or vaporized cannot enter the path of the laser beam and thus cannot deflect, diffuse or attenuate it. This results in greater precision in the ablation process.
[0030] In a particularly advantageous embodiment of the method according to the invention, the cutting tool and the laser beam are moved simultaneously. The cutting tool is guided over the surface of the base glazing, on which the functional coating is arranged. The laser beam is launched into the base glazing through the surface that faces away from the coated surface of the base glazing and guided through the base glazing into the functional coating. Particularly preferably, the laser beam is guided in a region of the functional coating covered by the coolant. This has the particular advantage that material vaporized from the functional coating cannot move freely through the device and thus also cannot precipitate into adjacent regions of the base glazing. The material removed from the surface is bound to the coolant and can be removed from the coated surface of the first pane with the coolant, for example, in a typically following washing step. With such a process, particularly high quality glazing can be produced.
[0031] In process step (c), the first glazing is arranged so that one of its surfaces that is provided with the functional coating is facing the thermoplastic intermediate layer. The surface thus becomes the inner surface of the first pane.
[0032] The thermoplastic intermediate layer can be formed by a single intermediate layer or even by two or more intermediate layers that are laminarly arranged one over the other.
[0033] The connection of the first and second panes in process step (c) is preferably carried out by the action of heat, vacuum and/or pressure. Methods known per se for producing a composite glazing can be used.
[0034] For example, so-called autoclave methods can be carried out at an elevated pressure of approximately 1 MPa to 1.5 MPa (10 bar to 15 bar) and temperatures of 130 °C to 145 °C for approximately 2 hours. Vacuum bag or vacuum ring methods known per se operate, for example, at approximately 0.02 MPa (200 mbar) and 80 °C to 110 °C. The first glazing, the thermoplastic intermediate layer and the second glazing can also be pressed in a calender between at least one pair of rollers to form a composite glazing. Systems of this type for producing composite glazing are known and usually have at least one heating tunnel upstream before a pressing plant. The temperature during the pressing operation is, for example, 40 °C to 150 °C. Combinations of calendering and autoclaving methods have proven to be particularly effective in practice. Alternatively, vacuum laminators can be used. They consist of one or a plurality of heatable and evacuable chambers in which the first glazing and the second glazing are laminated within, for example, approximately 60 minutes at reduced pressures from 1 Pa to 0.08 mPa (0.01 mbar to 800 mbar) and temperatures from 80 °C to 170 °C.
[0035] The invention further includes a device for carrying out the method according to the invention. The device according to the invention comprises at least: - a cutting tool for cutting out or notching a first glazing out of a base glazing, - a coating removal tool for introducing a coating freed region into a functional coating on the base glazing, and - a mobile device for moving the cutting tool and the coating removal tool.
[0036] In an advantageous embodiment, the cutting tool includes a cutting wheel, preferably produced from a carbide, a diamond tip or a carbide tip. Particularly preferably, the cutting tool is cooled with a coolant, in particular in the region in contact with the base glazing. In an alternative advantageous embodiment, the cutting tool includes a laser beam.
[0037] It is also understood that in the case of a base glazing produced from a brittle material such as glass, the cutting tool only cuts into or notches in it and the first glazing is subsequently broken from the base glazing, by example, by a light mechanical load.
[0038] In another advantageous embodiment, the coating removal tool includes a laser beam. A laser beam is particularly advantageous in order to affect complete, fast and, consequently, economical coating removal.
[0039] In another advantageous modality, the mobile device includes a robot or a manipulation device with multiple geometric axes and, preferably, an X-Y positioning table. In an advantageous embodiment, the coating removal tool and the cutting tool are connected to each other or are moved simultaneously with each other by the same mobile device. This makes the device according to the invention particularly simple and economical.
[0040] In an advantageous embodiment of the device according to the invention, the coating removal tool includes a laser beam. The coating removal tool and the cutting tool are disposed on opposite sides of a plane in which the base glazing is disposed. The device is thus constituted so that the cutting tool can process a surface of the base glazing and the laser beam enters through the opposite surface of the base glazing into the base glazing and reach the functional coating therethrough. The base glazing is rotated with the surface on which the functional coating is disposed facing the cutting tool so that the laser beam can penetrate through the surface opposite the coated surface on the base glazing. The cutting tool and laser beam are guided so that the laser beam, after passing through the base glazing, emerges in a region of the functional coating that is covered by the coolant. The laser beam hits the boundary between the base glazing and the functional coating, while the side of the functional coating that faces away from the boundary is covered with coolant. This has - as already indicated above - the particular advantage that components removed from the functional coating are bound in the coolant and can be washed later.
[0041] The invention further includes a composite glazing with a functional coating produced with the method according to the invention, wherein the composite glazing comprises at least the following characteristics: - a first glazing with a surface III, a second glazing with a surface II and a thermoplastic intermediate layer, wherein the surface III of the first pane is laminarly bonded by means of the thermoplastic interlayer to the surface II of the second pane. - at least one functional coating, which is applied on at least part of the inner surface III of the first pane, - at least one region free of coating, which completely surrounds an inner region of the functional coating.
[0042] This results in the fact that the inner region is not adjacent to the side edge of the first pane.
[0043] In an advantageous embodiment, the region free of coating is at least partially or preferably completely surrounded by an outer region of the functional coating. In other words, the inner region and the uncoated region are disposed at least partially and preferably completely within the outer region of the functional coating.
[0044] Herein, "completely encircled" means that the uncoated region is completely encircled by an outer frame-shaped peripheral region of the functional cladding.
[0045] The outer region of the functional coating may, in turn, be at least partially and preferably completely surrounded by another region free from coating and it may, in turn, be partially and preferably completely surrounded by another outer region of the functional coating.
[0046] In the context of the invention, there is no material connection of the functional coating material between the inner region and the side edge of the first pane or between the inner region and an outer region or a plurality of outer regions. The uncoated region and the functional coating in the inner region are hermetically sealed by the intermediate layer during the lamination operation to produce the composite glazing. In this way, moisture from around the composite glazing can no longer reach the inner region of the functional coating, and the functional coating in the inner region is effectively protected against corrosion.
[0047] In an advantageous embodiment of the composite glazing according to the invention, the region free of coating is strip-shaped and is arranged substantially parallel to the lateral edges of the first glazing. This has special advantages from a process technology standpoint as the coating removal tool can be guided parallel to the cutting tool and thus parallel to the side edge and along the entire first pane. Reliable separation of material from the inner region of the composite glazing surroundings is ensured by crossing uncoated regions in the corner regions of the first glazing.
[0048] This means that the coating-free region is substantially completely surrounded by a frame-shaped peripheral region of the functional coating of the outer region. In addition, there are strip-shaped coating-free region extension elements connecting the frame-shaped peripheral coating-free region within the outer region to the side edges of the first pane. Since these extension elements are also hermetically sealed by the intermediate layer in the finished composite glazing, this has no effect on the corrosion resistance of the functional coating.
[0049] In another advantageous embodiment of the composite glazing according to the invention, the width b of the external area or areas is from 0.5 mm to 30 mm and preferably from 3 mm to 11 mm. Width is defined in this document as the dimension orthogonal to the edge of the inner region. Such widths b are particularly advantageous since, on the one hand, they provide reliable corrosion protection and, on the other hand, they can be hidden by a black or decorative print or by the vehicle body.
[0050] In a particularly advantageous embodiment of the composite glazing according to the invention, the outer region surrounds the inner region by more than 70% and preferably by more than 90% of the length of the perimeter of the inner region. In other words, the outer region is excluded only in some zones, such as uncoated communication windows or in the region of feed lines to the busbars.
[0051] In another advantageous embodiment of the composite glazing according to the invention, a first region free of coating is completely surrounded by a second region free of coating. The outer region with a functional coating is thereby disposed between the first and second regions free from the coating. Particularly preferably, the second uncoated region is completely surrounded by a third uncoated region. In other words, another second outer region with a functional coating is disposed between the second and third regions without the coating. By means of such coating-free second or third regions, particularly good moisture protection and hence particularly good corrosion protection are obtained.
[0052] In another advantageous embodiment of the composite glazing according to the invention, the width d of the region free from coating is from 30 µm to 30 mm, preferably from 100 µm to 2 mm and particularly preferably from 250 µm to 1.5 mm and in particular from 250 μm to 500 μm. This has the particular advantage that uncoated regions with such a small width can be produced very quickly and simply.
[0053] Coating-free regions can be produced by any suitable technical method. Coating removal by laser ablation is particularly preferred. This has the particular advantage that it can be carried out cost-effectively, quickly and accurately. Due to its precision laser ablation is particularly suitable for narrow widths d.
[0054] In principle, all electrical insulation substrates that are thermally or chemically stable, as well as dimensionally stable under the conditions of production and use of the glazing according to the invention are suitable as the first and second glazing.
[0055] The first glazing and/or the second glazing preferably contain glass, particularly preferably flat glass, float glass, quartz glass, borosilicate glass, soda-lime glass or transparent plastics, preferably rigid transparent plastics in particular polyethylene, polypropylene, polycarbonate, methyl methacrylate, polystyrene, polyamide, polyester, polyvinyl chloride and/or mixtures thereof. The first glazing and/or the second glazing are preferably transparent, in particular for use of the glazing as a windshield or a rear window of a vehicle or other uses in which high light transmittance is desired. In the context of the invention, "transparent" means a glazing that has a transmittance greater than 70% in the visible spectral range. For glazing that are not in the driver's traffic-relevant field of vision, eg for roof glazing, the transmittance can however also be much lower, eg greater than 5%.
[0056] The thickness of the individual glazings can vary widely and thus be ideally adapted to the requirements of the individual case. Preferably, glazing with standard thickness from 1.0 mm to 25 mm, preferably from 1.4 mm to 2.5 mm, are used for motor vehicle glass and preferably from 4 mm to 25 mm for furniture, devices and buildings, in particular, for electric heaters. The size of the glazing can vary widely and is determined by the size of use according to the invention. The first glazing and, optionally, the second glazing have, for example, in the automobile industry and in the architectural sector, usual areas of 200 cm2 up to 20 m2.
[0057] The composite glazing can have any three-dimensional shape. Preferably, the three-dimensional shape has no shadow areas so that it can, for example, be coated by sputtering. Preferably, the substrates are flat or slightly or broadly curved in one or a plurality of spatial directions. In particular, flat substrates are used. Glazing can be colorless or colored.
[0058] Multiple individual panes are bonded together by means of at least one intermediate layer. The intermediate layer preferably contains at least one thermoplastic plastic, preferably polyvinyl butyral (PVB), ethylene vinyl acetate (EVA) and/or polyethylene terephthalate (PET). However, the thermoplastic intermediate layer can also contain, for example, polyurethane (PU), polypropylene (PP), polyacrylate, polyethylene (PE), polycarbonate (PC), methyl methacrylate, polyvinyl chloride, polyacetate resin, resins. foundry, acrylates, fluorinated ethylene-propylene, polyvinyl fluoride and/or ethylene tetrafluoroethylene or copolymers or mixtures thereof. Intermediate layers with relatively poor adhesion properties can also be arranged and laminated between intermediate layers with better adhesion properties, eg PVB/PET/PVB. The thermoplastic intermediate layer can be formed from one or even a plurality of thermoplastic films arranged one on the other, wherein the thickness of a thermoplastic film is preferably from 0.25 mm to 1 mm, typically from 0.38 mm or 0.76 mm.
[0059] In a composite glazing according to the invention composed of a first glazing, a thermoplastic intermediate layer and a second glazing, the functional coating is applied directly on the first glazing. The first pane and the second pane in each case have an inner surface and an outer surface. The inner surfaces of the first and second panes are rotated towards each other and bonded together by means of the thermoplastic intermediate layer. The outer surfaces of the first and second panes are rotated in the opposite direction to each other and to the thermoplastic intermediate layer. The functional coating is applied to the inner surface of the first pane. In fact, another functional coating can also be applied to the interim surface of the second pane. Even the outer surfaces of the windows can have coatings. The terms "first pane" and "second pane" are selected to distinguish between the two panes in a composite pane according to the invention. No information regarding the geometric arrangement is associated with the terms. If, for example, the glazing according to the invention is provided in an opening, for example, of a motor vehicle or a building, to separate the internal from the external environment, the first glazing may face the internal or external environment .
[0060] The functional coating is preferably transparent. Herein, "transparent" means permeable to electromagnetic radiation, preferably electromagnetic radiation of a wavelength of 300 nm to 1,300 nm and, in particular, visible light. Thus, in the context of the invention, a composite glazing with a functional coating that has a transmittance greater than 70% in the visible spectrum is understood to be "transparent". For panes that are not located in the driver's traffic-relevant field of vision, eg for sunroofs, the transmittance can however also be much lower, eg greater than 5%.
[0061] If the functional coating is used for electrically heating the composite glazing, it is implemented as an electrically conductive functional coating and preferably as a transparent, electrically conductive functional coating.
[0062] Electrically conductive functional coatings according to the invention are known, for example, from documents DE 20 2008 017 611 U1, EP 0 847 965 B1 or WO2012/052315 A1. They typically include a functional layer or a plurality of, for example, two, three or four electrically conductive functional layers. The functional layers preferably include at least one metal, for example silver, gold, copper, nickel and/or chromium or a metal alloy. Functional layers particularly preferably comprise at least 90% by weight of metal, in particular at least 99.9% by weight of metal. Functional layers can be produced from metal or metal alloy. Functional layers particularly preferably include silver or a silver-containing alloy. Such functional layers have a particularly advantageous electrical conductivity with, at the same time, high transmittance in the visible spectral range. The thickness of a functional layer is preferably from 5 nm to 50 nm, particularly preferably from 8 nm to 25 nm. In this range, for the thickness of the functional layer, an advantageously high transmittance in the visible spectral range and a particularly advantageous electrical conductivity are obtained.
[0063] Typically, at least one dielectric layer is disposed in each case between two adjacent functional layers of the functional coating. Preferably, another dielectric layer is disposed below the first and/or above the last functional layer. A dielectric layer includes at least one individual layer produced from a dielectric material, for example, which includes a nitride such as silicon nitride or an oxide such as aluminum oxide. However, the dielectric layer can also comprise multiple individual layers, for example, individual layers of a dielectric material, smoothing layers, adaptive layers, blocking layers and/or anti-reflective layers. The thickness of a dielectric layer is, for example, 10 nm to 200 nm.
[0064] This layer structure is, in general, obtained by a succession of deposition operations that are carried out using a vacuum method, such as magnetic field enhanced sputtering.
[0065] Other suitable functional coatings preferably include indium tin oxide (ITO), fluorine-doped tin oxide (SnO2:F) or aluminum-doped zinc oxide (ZnO:Al).
[0066] A functional coating used as an electrical heating layer can, in principle, be any coating that can be electrically contacted. If the glazing, according to the invention, is intended to enable vision through it, as is, for example, the case with glazing in the window sector, the functional coating is preferably transparent.
[0067] In an advantageous embodiment, the functional coating is a layer or a layer structure of a plurality of individual layers with a total thickness less than or equal to 2 µm, particularly preferably less than or equal to 1 µm.
[0068] An advantageous functional coating according to the invention, which is used as an electrical heating layer, has a blade resistance of 0.4 ohm/square to 10 ohm/square. In a particularly preferred embodiment, the functional coating according to the invention has a blade resistance of 0.5 ohm/square to 1 ohm/square. Coatings with such blade resistors are particularly suitable for heating motor vehicle window panes at typical built-in voltages from 12 V to 48 V or in electric vehicles with typical built-in voltages up to 500 V.
[0069] In an advantageous embodiment, the composite glazing according to the invention has at least two collector bars provided to connect to a voltage source, which are connected to an electrically conductive functional coating and preferably to a functional coating electrically conductive, transparent so that a current path for a heating current is formed between the collector bars.
[0070] The collector bars are preferably arranged along the upper and lower side edges of the inner region of the electrically conductive functional coating. The length of the busbar is typically substantially the same as the length of the inner region, but it can also be shorter. Furthermore, more than two collector bars can be arranged in the electrically conductive functional coating, preferably in the edge region along two opposite side edges of the inner region. In addition, more than two collector bars can be arranged in the functional coating, for example, to form two or more independent heating fields in a functional coating or when the collector bar is interrupted or displaced by one or more uncoated zones.
[0071] In an advantageous modality, the collector bar according to the invention is deployed as an activated and printed conductive structure. The printed collector bar preferably contains at least one metal, a metal alloy, a metal and/or carbon compound, particularly preferably a noble metal, in particular silver. The printing paste preferably contains metallic particles, metal and/or carbon particles and, in particular, noble metal particles such as silver particles. Electrical conductivity is preferably achieved through electrically conductive particles. The particles can be situated in an organic and/or inorganic matrix, such as pastes or inks, preferably, as printing paste with glass frits.
[0072] The width of the first and second collector bars is preferably from 2 mm to 30 mm, particularly preferably from 4 mm to 20 mm and in particular from 10 mm to 20 mm. Thinner pick-up bars result in excessively high electrical resistance and hence excessively high pick-up bar heat during operation. Furthermore, thinner collector bars can only be produced with difficulty using printing techniques such as screen printing. Thinner collector bars require undesirably high material usage. Furthermore, they result in an unaesthetic and excessively large restriction of the glazing region of transparency. The length of the collector bar is driven by the dimensions of the electrical heating layer. With a collector bar that is typically deployed in the form of a strip, the largest of its dimensions is called its length and the smallest of its dimensions is called its width. The third collector bars or additional collector bars can be designed even thinner, preferably from 0.6 mm to 5 mm.
[0073] The layer thickness of the printed collector bar is preferably from 5 μm to 40 μm, particularly preferably from 8 μm to 20 μm and particularly more preferably from 8 μm to 12 μm. Printed bus bars in these thicknesses are technically simple to produce and have an advantageous current-carrying capacity.
[0074] The specific resistance pa of the collector bars is preferably from 0.8 µohm^cm to 7.0 µohm^cm and particularly preferably from 1.0 µohm^cm to 2.5 µohm^cm. Collector bars with specific resistances in this range are technically simple to produce and have an advantageous current-carrying capacity.
[0075] Alternatively, the collector bar can be deployed as a strip of an electrically conductive film. The collector bar then includes, for example, at least aluminium, copper, tinned copper, gold, silver, zinc, tungsten and/or tin or alloys thereof. The strip preferably has a thickness of 10 µm to 500 µm, particularly preferably 30 µm to 300 µm. Collector bars produced from electrically conductive metal sheets of these thicknesses are technically easy to produce and have an advantageous current-carrying capacity. The strip can be electrically conductively connected to the electrically conductive structure, for example, via a soldering compound, via an electrically conductive adhesive or by direct placement.
[0076] The functional coating can extend over the entire surface of the first pane. However, alternatively, the functional coating may extend over only part of the surface of the first pane. The functional coating preferably extends over at least 50%, particularly preferably over at least 70% and particularly more preferably over at least 90% of the inner surface of the first pane. The functional coating can have one or a plurality of uncoated regions in the inner region and/or in the outer region. These zones can be permeable to electromagnetic radiation and are, for example, known as data transmission windows or communication windows.
[0077] The power supply line is preferably deployed as a flexible metal sheet (smooth conductor, ribbon cable conductor). This means an electrical conductor whose width is significantly greater than its thickness. Such a foil conductor is, for example, a strip or a band which contains or is produced from copper, tinned copper, aluminum, silver, gold or alloys thereof. The sheet metal conductor has, for example, a width of 2 mm to 16 mm and a thickness of 0.03 mm to 0.1 mm. The foil conductor may have a polymeric sheath, preferably insulating, for example based on polyimide. Sheet metal conductors that are suitable for contacting electrically conductive coatings on glass panes have a total thickness of, for example, only 0.3 mm. Such a thin sheet metal conductor can be incorporated without difficulty between the individual glazings in the thermoplastic intermediate layer. A plurality of electrically insulated conductive layers may be situated on a sheet metal conductor band.
[0078] Alternatively, thin metal wires can also be used as the electrical supply line. Metal wires contain, in particular, copper, tungsten, gold, silver or aluminum or alloys of at least two of these metals. Alloys can also contain molybdenum, rhenium, osmium, indium, palladium or platinum.
[0079] The invention further includes the use of composite glazing with the functional coating produced according to the method, according to the invention, in buildings, in particular, in the access area, window area, ceiling area or facade area , as a part incorporated in furniture and devices, in means of transport for travel by land, by air or by water, in particular, in trains, ships and motor vehicles, for example, as a windshield, rear window, side window and/or sunroof.
[0080] In the following, the invention is explained in detail with reference to the drawings and exemplary embodiments. The drawings are a schematic representation and are not faithful to scale. The drawings in no way restrict the invention.
[0081] They portray:
[0082] Figure 1A is a perspective view of a schematic representation of a device according to the invention for carrying out the method according to the invention;
[0083] Figure 1B is a cross-sectional view along section line E-E' of a base glazing in Figure 1A,
[0084] Figure 1C is a cross-sectional view of an alternative device according to the invention for carrying out the method according to the invention along section line EE' of a base glazing 1' based on Figure 1A ;
[0085] Figure 2 is a detailed flowchart of an embodiment of the method according to the invention.
[0086] Figure 3A is a cross-sectional view along the section line F-F' of a first pane 1 of Figure 1A after step (b) of the method according to the invention;
[0087] Figure 3B is a cross-sectional view along the section line F-F' of a first pane 1 of Figure 1A after step (c) of the method according to the invention;
[0088] Figure 4A is a plan view of an embodiment of a composite glazing according to the invention,
[0089] Figure 4B is a cross-sectional view along section line B-B' of the composite glazing according to the invention of Figure 4A,
[0090] Figure 5A is a plan view of an alternative embodiment of a composite glazing with a functional coating according to the invention,
[0091] Figure 5B is a cross-sectional view along section line A-A' of the composite glazing in Figure 5A,
[0092] Figure 6A is a plan view of another embodiment of composite glazing with a functional coating according to the invention,
[0093] Figure 6B is a cross-sectional view along section line B-B' of the composite glazing according to the invention of Figure 6A,
[0094] Figure 7A is a plan view of another embodiment of composite glazing with a functional coating according to the invention,
[0095] Figure 7B is a cross-sectional view along section line C-C' of the composite glazing according to the invention of Figure 7A,
[0096] Figure 8A is a plan view of another embodiment of composite glazing with a functional coating according to the invention,
[0097] Figure 8B is a cross-sectional view along section line D-D' of the composite glazing according to the invention of Figure 8A,
[0098] Figure 1A represents a perspective view of a schematic representation of a device 30 according to the invention for carrying out the method according to the invention. The device 30 includes a cutting tool 18 for cutting a first pane 1 from a larger pane, which is referred to below as the base pane 1'. A functional coating 3 is arranged on the base glazing 1’.
[0099] Figure 1B represents a cross-sectional view of the device 30 according to the invention of Figure 1A along with a cutting plane, which moves parallel to the section line E-E' and orthogonal to the base glazing 1'.
[00100] The cutting tool 18 is, in this example, a cutting wheel 16 produced from a carbide. It is understood that other cutting tools 18, such as a diamond needle or laser, can also be used. Likewise, it is understood that the cutting tool 18, in the case of a base glazing 1' produced from glass, cuts only the same or notches the same and the first glazing 1 subsequently breaks out of the base glazing 1 ', for example, by means of a light mechanical load.
[00101] The device 30 additionally includes a coating removal tool 17 to introduce a coating-free region 9.1 into the functional coating 3. The coating removal tool 17 is, in this example, a laser beam 15. The laser beam 15 is guided in the functional coating 3 on the surface III of the base glazing 1'. At that moment, the functional coating 3 is ablated by the action of the laser beam 15, for example, by vaporization.
[00102] It is understood that the coating removal tool 17 may also be a grinding wheel or other suitable tool.
[00103] The device 30 according to the invention further includes a mobile device 19 with which the cutting tool 18 and the coating removal tool 17 can be moved. In this example, the mobile device 19 is an X-Y positioning table 20, which simultaneously moves the tools 18,19 in the plane of the base glazing 1'. Any other suitable device can be used as mobile device 19, for example a manipulator with multiple geometric axes or a robot.
[00104] Likewise, the coating removal tool 17 and in particular the laser can be arranged on the other side of the base glazing 1' so that the laser beam 15 is guided through the first glazing 1 and only then hits the functional coating 3. This arrangement has the particular advantage that the vaporized material from the functional coating 3 cannot enter the path of the laser beam 15 so that the beam is not scattered and not weakened, and greater accuracy of patterning is achieved.
[00105] Figure 1C represents an alternative embodiment of a device according to the invention for carrying out the method according to the invention. In that case, the coating removal tool 17 is a laser, which is arranged on the side of the base glazing 1' opposite the cutting tool 18 compared to Figure 1B so that the laser beam 15 is guided through the first. glazing 1 and only then reaches the functional coating 3. Preferably, the cutting wheel 16 of the cutting tool 18 is cooled together with a region of the functional coating 3 with a coolant 21, for example a cutting oil, which humidifies at least a region of the functional coating 3. Advantageously, the laser beam 15 passes through the first pane 1 into the functional coating 3, which is humidified with the cooling fluid 21 on the side facing away from the first. glazing 1. The laser beam 15 can be guided immediately adjacent to the point of contact between the cutting wheel 16 and the functional coating 3, or after a trail, which exits from behind the coolant in the coating f functional 3 after processing with the cutter wheel 16. This arrangement has the particular advantage that the vaporized material from the functional coating 3 is bound by the coolant 21 and therefore cannot diffuse through the arrangement or be deposited in sections adjacent to the functional coating 3. Typically, the cooling fluid 21 that remains on the surface of the first pane 1 is washed in another process step and, with it, the material that undergoes ablation of the functional coating 3 attached to the cooling fluid 21 is also is removed.
[00106] Figure 2 represents a flowchart of an exemplary embodiment of the method according to the invention for producing a composite glazing 100 with a functional coating 3.
[00107] In step (a), a functional coating 3 is applied on the surface III of a base glazing 1', for example, by sputtering.
[00108] In step (b), a first glazing 1 is cut or notched from the base glazing 1' by a cutting tool 18, and at least one region free from peripheral coating in frame format 9.1 is introduced by a coating removal tool 17 in functional coating 3, wherein in first pane 1, an inner region 11 of functional coating 3 is completely separated from an outer region 10.1 of functional coating 3 so that inner region 11 is not adjacent to a side edge 6 of the first pane 1.
[00109] In step (c), the surface III of the first glazing 1 with the functional coating 3 is bonded by means of a thermoplastic intermediate layer 4 to a surface II of a second glazing 2.
[00110] Figure 3A represents a cross-sectional view along the section line F-F' of the first pane 1 after the process step (b). In a region free of coating 9.1, functional coating 3 is completely removed over a width d1. The functional coating 3 is thereby divided into an inner region 11 and an outer region 10.1. This means that there is no longer a material connection of the functional coating material 3 from the inner region 11 to the outer region 10.1.
[00111] Then, in step (c), the first glazing 1 is bonded to a second glazing 2 by means of a thermoplastic intermediate layer 4 using usual lamination processes, for example, in the autoclave. Figure 3B represents laminated composite glazing 100 which has been prepared according to the method according to the invention.
[00112] Figure 4A represents a plan view of an exemplary embodiment of a composite glazing 100 with a functional coating 3 according to the invention. Figure 4B represents a cross-sectional view along section line B-B' of the composite glazing 100 according to the invention of Figure 4A. The composite glazing 100 comprises a first glazing 1, a second glazing 2 and a thermoplastic intermediate layer 4, which laminates the surface III of the first glazing 1 to the surface II of the second glazing 2. The first glazing 1 and the second glazing 2 are produced , for example, from soda-lime glass. The thickness of the first pane 1 is, for example, 1.6 mm and the thickness of the second pane 2 is 2.1 mm. The thermoplastic intermediate layer 4 is produced, for example, from polyvinyl butyral (PVB) and has a thickness of 0.76 mm. The dimensions of the composite glazing 100 are, for example, 1 m x 1 m.
[00113] A functional coating 3 of an electrically conductive transparent coating, which can, for example, serve as an infrared reflection layer or an electrical heating layer, is applied on the surface III of the first pane 1. The coating functions 3 is a layer system that includes, for example, three electrically conductive silver layers that are separated from each other by dielectric layers.
[00114] The functional coating 3 extends, for example, over the entire surface III of the first pane 1 minus a region free of peripheral coating in frame format 9.1, which separates an inner region 11 of the functional coating 3 completely from an outer region 10.1 of the functional coating 3. This means that the inner region 11 is not adjacent to a side edge 6 of the first pane 1. In the example shown in this document, the region free of peripheral coating in frame format 9.1 is in the shape of a rectangle and, in this case, square stripped cladding line with a width d1, which is drawn back on the inner pane over the entire perimeter by a distance b1 from the side edge 6 of the composite pane 100. The distance b1 is, in this case, the width of the region external 10.1 and is, for example, 5 mm. The width d1 of the coating-free region 9.1 is, for example, constant and is, for example, 300 µm. This arrangement prevents the inner region 11 of the functional covering 3 from being adjacent to the side edge 6 of the first pane 1. In the composite pane 100, the functional covering 3 is thereby prevented from having direct access to the external atmosphere of the composite pane 100. By laminating the first glazing 1 and the second glazing 2 with the intermediate layer 4, the uncoated region 9.1 is completely filled with the material of the intermediate layer 4, and the inner region 11 is hermetically sealed. The functional coating 3 on the inner region 11 is thereby effectively protected against moisture and hence against corrosion. As the inventors' investigations have surprisingly revealed, a width di of only 30 µm is sufficient to protect the functional coating 3 in the inner region 11 against corrosion. It is understood that even more sections of the functional coating 3 can be uncoated within the inner region 11 or the outer region 10.1, without the above-described effect of corrosion protection according to the invention being deficient. The narrow coating-free region 9.1 can, for example, be produced by removing laser coating from the functional coating 3. This has the particular advantage that the composite glazing 100 according to the invention can be produced quickly and economically.
[00115] Figure 5A represents a plan view of an alternative embodiment of a composite glazing 101 according to the invention. Figure 5B is a cross-sectional view along section line A-A' through the composite glazing of Figure 5A. The basic structure of composite glazing 101 corresponds to the materials and dimensions of composite glazing 100 according to the invention of Figure 4A and Figure 4B. The composite glazing 101 likewise has a functional coating 3, which is arranged on the surface III of the first glazing 1.
[00116] Unlike the composite glazing 100 according to the invention of Figure 4A and Figure 4B, the composite glazing 101 has, at the edge region 12 of the first glazing 1, a region free from coating 9.1 with a width d1 of 15 mm, which extends across the entire edge glazing 6. In other words, composite glazing 101 has no outer region 9.1 produced from a functional coating 3.
[00117] Figure 6A represents a plan view of an alternative embodiment of a composite glazing 100 according to the invention with a functional coating 3. Figure 6B represents a cross-sectional view along section line BB' of the composite glazing 100 in accordance with the invention of Figure 6A. The structure of the composite glazing 100 of Figure 6A and of Figure 6B substantially corresponds to the structure of the composite glazing 100 of Figures 4A and 4B so that, later on, only the differences between the two composite glazings 100 are described.
[00118] The functional coating 3 likewise extends, as in the example of Figure 4A, over the entire surface III of the first pane 1 minus a region free of peripheral coating in frame format 9.1, which completely separates an internal region 11 from the functional coating 3 of an outer region 10.1 of the functional coating 3 such that the inner region 11 is not adjacent to a side edge 6 of the first pane 1. In contrast to Figure 4A, in the example of Figure 6A, the region is free of coating. 9.1 is formed by strips that run parallel to the lateral edges 6 of the first pane 1. The strips intersect, in each case, in the corner regions of the first pane 1. A frame-shaped peripheral region corresponding to the region free of coating 9.1 and which completely separates the functional coating 3 from the side edge 6 of the first pane 1 is created by the intersecting strips. In this way, on the finished composite glazing 100, the functional coating 3 in the inner region 11 is hermetically sealed from the surroundings of the composite glazing 100 and is protected from moisture penetration from the outside. In contrast to the exemplary embodiment of Figure 4A, the uncoated region 9.1 in Figure 6A has extension elements 22 which extend from the uncoated region 9.1 along the entire side edge 6 in the corner regions of the first pane. Since they are also hermetically sealed after lamination with the thermoplastic intermediate layer 4, in this document, again, no moisture can reach the functional coating 3 in the inner region 11. The coating-free regions 9.1 produced from such strips of Parallel displacements can be produced particularly simply from a production technology standpoint, for example by parallel guidance of a coating removal tool for coating removal from the coating-free region 9.1, such as a laser, for another tool that cuts the first pane 1 of a larger base pane or notch the same for separation.
[00119] Figure 7A represents a plan view of an alternative embodiment of a composite glazing 100 according to the invention with a functional coating 3. Figure 7B represents a cross-sectional view along section line CC' of the composite glazing 100 in accordance with the invention of Figure 7A. The structure of the composite glazing 100 of Figure 7A and of Figure 7B substantially corresponds to the structure of the composite glazing 100 of Figures 6A and 6B so that, later on, only the differences between the two composite glazings 100 are described. Reference signals 10.1 and 10.2 refer to the outer region.
[00120] The composite glazing 100 represented in this example has, in addition to the uncoated region 9.1, other uncoated regions 9.2, which is molded by the uncoated region 9.1. The coating-free region 9.2 has, for example, a width d2 of 100 µm and a distance b2 from the coating-free region 9.1 of 2 mm. Both regions without coating 9.1,9.2 are formed by strips that run parallel to the side edge 6 of the first pane 1, which cross at the corners of the first pane 1 in each case and have extension elements 16. This means that the region The inner edge 11 of the functional coating 3 of the first pane 1 is separated from the side edge 6 by at least a stripped skin region 9.1 of width d1 and a stripped skin region 9.2 of width d2. In the finished composite glazing 1, this results in an increased and thus improved separation of the inner region 11 from the atmosphere surrounding the composite glazing 100 and thereby improved protection against moisture and thus against corrosion.
[00121] Figure 3 represents a plan view of another exemplary embodiment of a composite glazing 100 according to a functional coating 3 in the form of an electrical heating layer. The composite glazing 100 comprises a first glazing 1 and a second glazing 2, which are connected to each other by means of a thermoplastic intermediate layer 4. The composite glazing 100 is, for example, a glazing for a motor vehicle and, in particular, the windshield of a passenger car. The first pane 1, for example, is intended to face inwards in the installed position. The first pane 1 and the second pane 2 are produced from soda-lime glass. The thickness of the first pane 1 is, for example, 1.6 mm and the thickness of the second pane 2 is 2.1 mm. The thermoplastic intermediate layer 4 is produced from polyvinyl butyral (PVB) and has a thickness of 0.76 mm. A functional coating 3 produced from an electrically conductive coating, which can be used as an electrical heating layer of Figure 1A, is applied on the inner surface III of the first pane 1. The functional coating 3 is a layer system that includes , for example, three electrically conductive silver layers that are separated from each other by dielectric layers. When a current flows through this electrically conductive functional coating 3, it is heated as a result of its electrical resistance and heating by Joule. Consequently, the functional coating 3 can be used for active heating of the composite glazing 100.
[00122] The functional coating 3 extends, for example, over the entire surface III of the first pane 1 minus a peripheral frame-shaped region without coating 9.1 with a width di of 100 μm. The uncoated region 9.1 is offset from the inner pane by a distance b1 of, for example, 5 mm from the edge pane 6. In this document, the uncoated region 9.1 has two technical functions: it serves for electrical insulation between the car body and the functional coating carrying voltage 3 when it is electrically heated. In addition, the coating-free region 9.1 is hermetically sealed by adhesive bonding to the intermediate layer 4 and protects the functional coating 3 on the inner region 11 against damage and moisture and, consequently, against corrosion.
[00123] For the electrical contact of the functional coating 3 that serves as an electrical heating layer, a first collector bar 5.1 is arranged in the lower edge region and a second collector bar 5.2 is arranged in the upper edge region of the internal region 11 in the 3 functional coating in each case. The collector bars 5.1, 5.2 include, for example, silver particles and were applied to screen printing and then activated. The length of the collector bars 5.1, 5.2 approximately corresponds to the dimension of the internal region 11 of the functional coating 3.
[00124] When an electrical voltage is applied to the busbars 5.1 and 5.2, a uniform current flows through the electrically conductive functional coating 3 between the busbars 5.1,5.2. A supply line 7 is arranged approximately centrally on each busbar 5.1, 5.2. The supply line 7 is a sheet metal conductor known per se. The supply line 7 is electrically conductively connected to the collector bar 5.1,5.2 by means of a contact surface, for example with the use of a welding compound, an electrically conductive adhesive or by simple placement and pressure within the glazing composite 100. The foil conductor includes, for example, a tinned copper foil with a width of 10 mm and a thickness of 0.3 mm. The collector bars 5.1,5.2 are connected via the electrical supply lines 7 via connecting cables 13 to a voltage source 14 which provides a typical built-in voltage for motor vehicles, preferably from 12 V to 15 V and , for example, approximately 14 V. Alternatively, the voltage source 14 can also be higher voltages, for example, from 35 V to 50 V and in particular 42 V.
[00125] It is understood that the functional coating 3 may also have, in addition to the heating function, other functions such as infrared reflection or low-E properties.
[00126] An uncoated region 8 is arranged on the composite glazing 100 approximately centrally with respect to the width of the glazing. The uncoated region 8 has no electrically conductive material from the functional coating 3. In the present document, the uncoated region 8 is, for example, completely surrounded by the functional coating 3. Alternatively, the uncoated region 8 may be arranged at the edge of functional coating 3. The area of the uncoated zone 8 is, for example, 1.5 dm2. At its lower end, the uncoated zone 8 is adjacent to an additional collector bar 5.3 which abuts the uncoated zone 8 at the bottom. Uncoated zone 8 serves, for example, as a communication, sensor or camera window.
[00127] The collector bars 5.1, 5.2, 5.3 have, in the example shown, a constant thickness of, for example, approximately 10 μm and a constant specific resistance of, for example, 2.3 μohm^cm.
[00128] The composite glazings 100,101 produced according to the method according to the invention have been subjected to the usual corrosion tests. a) a humidity test at a temperature of 70 °C and a relative humidity of 100% over a period of 300 hours, as well as b) an alternative climate test with 20 cycles of 12 hours duration each in a 85% relative humidity and a temperature change of 85 °C to -40 °C. c) a salt spray test at a temperature of 35 °C for 960 hours with an aqueous sodium chloride solution.
[00129] All composite glazing 100,101 produced according to the invention demonstrated very good corrosion resistance in the corrosion tests mentioned above.
[00130] List of Reference Numbers: 1 first glazing 2 second glazing 3 functional coating 4 thermoplastic intermediate layer 5 .1,5.2,5.3 collector bar 6 side edge of first glazing 1 7 supply line 8 uncoated zone, communication window 9 .1.9.2 region free of coating 10 .1.10.2 outer region 11 inner region 12 edge region 13 connecting cable 14 voltage source 15 laser beam 16 cutter 17 removing coating tool 18 cutting tool 19 mobile device 20 XY positioning table 21 cooling fluid 22 extension element 30 device according to the invention 31 0.101 composite glazing according to the invention 32 surface of second window 2 111 internal surface of first window 1 112 external surface of first window 1 AA', BB', CC', DD', EE', FF' section line b1, b2 outer region width 10.1.10.2 d1, d2 region free of coating width 9.1.9.2 x,y direction

权利要求:
Claims (10)
[0001]
1. Method for producing a composite glazing (100) with a functional coating (3), characterized in that at least: (a) applying a functional coating (3) to at least part of a surface (III) of a glazing- base (1'), (b) cut, at the same time, a first glazing (1) from the base glazing (1'), and at least one region free from coating (9.1, 9.2) is introduced into the functional coating (3 ), in which a region free of coating completely surrounds an inner region (11) of the functional coating (3) and separates the inner region (11) from an outer region (10.1, 10.2), which partially or completely surrounds the inner region ( 11), and (c) bonding the surface (III) of the first glazing (1) with the functional coating (3) by means of a thermoplastic intermediate layer (4) to a surface (II) of a second glazing (2), wherein a coating removal tool (17) with a laser beam (15) is used to introduce the uncoated region (9.1, 9.2) and a cutting tool (18) with a cutting wheel (16) and with a coolant (21) is used for cutting, wherein, in step (b), the cutting wheel (16) is guided directly on the coated surface (III) of the first pane (1) and the laser beam (15) is launched on the first pane (1) through the surface (IV) which faces the opposite direction from the coated surface (III) of the first glazing (1) and is guided through the first glazing (1) over the functional coating (3), wherein the cutting tool (18) and the coating removal tool (17) are moved simultaneously and the beam The laser (15) is guided over the functional coating (3) in a region covered by the coolant (21).
[0002]
2. Device (30) for carrying out the method defined in claim 1, characterized in that it comprises at least: - a cutting tool (18) for cutting or notching a first glazing (1) outside a base glazing (1 '), - a coating removal tool (17) for introducing a coating free region (9.1, 9.2) into a functional coating (3) on the base glazing (1'), and - a mobile device (19) for moving the cutting tool (18) and the coating removal tool (17), wherein the cutting tool (18) is cooled with a coolant (21) and comprises a cutting wheel (16) or a tip diamond and the coating removal tool (17) comprises a laser beam (15). wherein the coating removal tool (17) and the cutting tool (18) are disposed on opposite sides of a plane in which the base glazing (1') can be disposed.
[0003]
3. Device (30) according to claim 2, characterized in that the mobile device (19) includes a robot or a manipulation device with multiple geometric axes or an X-Y positioning table (20).
[0004]
4. Composite glazing (100,101) with a functional coating (3) produced according to the method defined in claim 1, characterized in that it comprises at least: - a first glazing (1) with a surface (III), a second glazing (2) with a surface (II) and a thermoplastic intermediate layer (4), wherein the surface (III) of the first glazing (1) is laminarly bonded by the thermoplastic intermediate layer (4) to the surface (II) of the second glazing (2), - at least one functional coating (3), which is applied on at least part of the inner surface (III) of the first pane (1), - at least one region free of coating (9.1, 9.2) which completely surrounds an inner region (11) of the functional coating (3).
[0005]
5. Composite glazing (100,101), according to claim 4, characterized in that the region free of coating (9.1, 9.2) has a strip shape and is arranged substantially parallel to the side edges (6) of the first glazing (1 ).
[0006]
6. Composite glazing (100,101), according to claim 4 or 5, characterized in that the di/2 width of the region free of coating (9.1, 9.2) is from 30 μm to 30 mm, preferably 100 µm to 2 mm, particularly preferably from 250 µm to 1.5 mm and in particular from 250 µm to 500 µm.
[0007]
7. Composite glazing (100), according to any one of claims 4 to 6, characterized in that the internal region (11) of the functional coating (3) is partially or completely surrounded by at least one external region (10.1, 10.2) of the functional coating (3) and preferably the width b1/2 of the outer region (10.1, 10.2) is from 0.5 mm to 30 mm and particularly preferably from 3 mm to 11 mm.
[0008]
8. Composite glazing (100) according to any one of claims 4 to 7, characterized in that, in the first glazing (1), a first region free of coating (9.1) is completely limited by a second region free of coating (9.2) and preferably the second coating free region (9.2) is completely bounded by a third coating free region.
[0009]
9. Composite glazing (100), according to any one of claims 4 to 7, characterized in that the first glazing (1) and/or the second glazing (2) contains glass, preferably flat glass, float glass , quartz glass, borosilicate glass, soda-lime glass or polymers, preferably polyethylene, polypropylene, polycarbonate, polymethyl methacrylate and/or mixtures thereof.
[0010]
10. Composite glazing (100) according to any one of claims 4 to 7, characterized in that the functional coating (3) contains silver (Ag), indium-tin oxide (ITO), tin oxide doped with fluorine (SnO2:F) or aluminum-doped zinc oxide (ZnO:Al).

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法律状态:
2020-01-28| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|

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2021-06-01| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|

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2021-06-29| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 02/12/2015, OBSERVADAS AS CONDICOES LEGAIS. |

优先权:

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申请号 | 申请日 | 专利标题

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EP14198940|2014-12-18|

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EP14198940.0|2014-12-18|

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PCT/EP2015/078354|WO2016096435A1|2014-12-18|2015-12-02|Method for producing a composite pane having a corrosion-protected functional coating|

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