WO2023031223A1 - Custode de véhicule automobile comprenant une feuille de verre - Google Patents
Custode de véhicule automobile comprenant une feuille de verre Download PDFInfo
- Publication number
- WO2023031223A1 WO2023031223A1 PCT/EP2022/074117 EP2022074117W WO2023031223A1 WO 2023031223 A1 WO2023031223 A1 WO 2023031223A1 EP 2022074117 W EP2022074117 W EP 2022074117W WO 2023031223 A1 WO2023031223 A1 WO 2023031223A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- glass
- quarter panel
- sheet
- face
- reflective
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/22—Surface treatment of glass, not in the form of fibres or filaments, by coating with other inorganic material
- C03C17/23—Oxides
- C03C17/25—Oxides by deposition from the liquid phase
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/22—Surface treatment of glass, not in the form of fibres or filaments, by coating with other inorganic material
- C03C17/23—Oxides
- C03C17/25—Oxides by deposition from the liquid phase
- C03C17/256—Coating containing TiO2
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
- C03C17/36—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2217/00—Coatings on glass
- C03C2217/70—Properties of coatings
- C03C2217/72—Decorative coatings
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2218/00—Methods for coating glass
- C03C2218/10—Deposition methods
- C03C2218/11—Deposition methods from solutions or suspensions
- C03C2218/113—Deposition methods from solutions or suspensions by sol-gel processes
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2218/00—Methods for coating glass
- C03C2218/10—Deposition methods
- C03C2218/11—Deposition methods from solutions or suspensions
- C03C2218/119—Deposition methods from solutions or suspensions by printing
Definitions
- the invention relates to the field of quarter panels for motor vehicles comprising a sheet of glass.
- the object of the invention is to provide automobile quarter panels having an attractive decoration, in particular a decoration which is essentially visible from outside the vehicle.
- the subject of the invention is a motor vehicle quarter panel comprising a first sheet of glass intended to be located on the exterior side of the vehicle, characterized in that the face intended to be located on the exterior side of the vehicle, called face 1 , of said first sheet of glass is coated, on only a part thereof, with at least one reflective and transparent mineral coating forming a decoration.
- Another object of the invention is a process for obtaining such a rear quarter panel, comprising a step of depositing on only part of one face of a first sheet of glass, at least one reflective and transparent mineral coating forming decoration.
- the invention also relates to a motor vehicle comprising at least one such quarter panel (and in particular two quarter panels).
- the mineral coating is said to be reflective and transparent because it reflects part of the light and it transmits part of the light (in the visible). It is therefore not completely reflective (which would suppose that it would be opaque), nor completely transparent. In the remainder of the text, the reflective and transparent mineral coating is sometimes referred to simply as "mineral coating".
- a decoration can be visible by reflection, with good contrast, by people outside the vehicle, while remaining almost invisible to the occupants of the vehicle, in particular at grazing incidence.
- the quarter panel according to the invention is preferably curved, so as to match the curvature of the bodywork of the vehicle in which it is integrated.
- the quarter panel is laminated, that is to say it further comprises an additional sheet of glass, intended to be located on the interior side of the vehicle, adhesively bonded to the first sheet of glass at the means of a thermoplastic lamination interlayer, in particular based on polyvinylacetal.
- each sheet of glass has an internal face, facing the interior of the vehicle, and an external face, facing the exterior of the vehicle.
- the quarter panel is monolithic, that is to say it only comprises a single sheet of glass, in this case the first sheet of glass.
- the first sheet of glass is normally made of tempered glass in order to meet regulatory requirements in terms of safety.
- the first sheet of glass can be flat or curved.
- the first sheet of glass is generally flat when the mineral coating is deposited and is then curved.
- the glass of the first glass sheet is typically a silico-soda-lime glass, but other glasses, for example borosilicates or aluminosilicates can also be used.
- the first sheet of glass is preferably obtained by floating, that is to say by a process consisting in pouring molten glass onto a bath of molten tin.
- the first sheet of glass can alternatively be made of printed glass, therefore having a surface texturing, generally obtained by passing the glass between rolling rollers.
- the first sheet of glass is preferably tinted glass.
- the light transmission factor of the first sheet of glass is preferably between 2 and 50%, in particular between 8 and 45%, or even between 20 and 40%.
- a lower light transmission factor ensures good contrast, and therefore good visibility of the decor, but only on the side where it is placed.
- the glass comprises as coloring element iron oxide, denoted Fe 2 O 3 (total iron) in a content ranging from 0.5 to 1.2%, in particular from 0.6 to 1, 1%.
- the redox is preferably between 0.1 and 0.4, in particular between 0.2 and 0.3. Redox means the weight ratio between the ferrous iron content (expressed as FeO) and the total iron content (expressed as Fe 2 O 3 ).
- the glass preferably comprises the following coloring elements, in the weight contents defined below: Fe 2 O 3 (total iron) from 1.2 to 2.3%, in particular from 1 5 to 2.2%, CoO from 50 to 400 ppm, in particular from 200 to 350 ppm, Se from 0 to 35 ppm, in particular from 10 to 30 ppm.
- the redox is preferably between 0.1 and 0.4, in particular between 0.2 and 0.3.
- light transmission and reflectance factors are expressed taking into account the D65 illuminant and the CIE-1964 reference observer.
- the light transmittance of the glass sheet is measured in the absence of any coating (or in areas without coating).
- the other measurements are carried out in the presence of the mineral coating, therefore in the zones where this coating is present. Unless otherwise specified, these factors are determined at normal incidence.
- the first sheet of glass preferably has a thickness comprised in a range ranging from 0.7 to 19 mm, in particular from 1 to 10 mm, particularly from 2 to 6 mm, or even from 2 to 4 mm.
- the lateral dimensions of the first sheet of glass are to be adapted according to those of the laminated glazing into which it is intended to be integrated.
- the first glass sheet (and/or the additional glass sheet) preferably has an area of at least 0.1 m2.
- the first glass sheet is preferably coated with the mineral coating on 5 to 90% of the surface of the face of the glass sheet, in particular on 10 to 80%, depending on the desired decoration.
- the first sheet of glass, or the additional sheet of glass is preferably coated with an opaque layer, in particular in enamel, typically in black enamel, in particular placed at its periphery, for example in the form of a peripheral band.
- an opaque layer in particular in enamel, typically in black enamel, in particular placed at its periphery, for example in the form of a peripheral band.
- This opaque layer is preferably deposited by screen printing.
- the opaque layer is preferably deposited on the additional sheet of glass, in particular on face 3 of the quarter panel. When the opaque layer is deposited on the first sheet of glass, it will be deposited on face 2 of the quarter panel.
- a low-emissivity coating can be deposited on the face of the first sheet of glass opposite that carrying the reflective and transparent mineral coating, and/or if necessary on one face of the additional glass sheet.
- the normal emissivity of this coating measured at room temperature, is preferably less than 0.50, in particular 0.30 and even 0.20 or even 0.10.
- the refractive index of this coating and, where applicable, its color can influence the final appearance of the quarter panel.
- the low-emissivity coating is preferably a stack of thin layers.
- the stack of thin layers is preferably in contact with the first glass sheet or the additional glass sheet. It preferably covers all, or at least 90% of the surface of this sheet of glass.
- Contact in this text means physical contact.
- the expression “based on” is preferably meant the fact that the layer in question comprises at least 50% by weight of the material considered, in particular 60%, even 70% and even 80% or 90%.
- the layer may even essentially consist, or consist, of this material. By “essentially consist”, it should be understood that the layer can include impurities without influence on its properties.
- oxide or “nitride” do not necessarily mean that the oxides or nitrides are stoichiometric. They can indeed be under-stoichiometric, over-stoichiometric or stoichiometric.
- the stack preferably comprises at least one layer based on a nitride.
- the nitride is in particular a nitride of at least one element chosen from aluminum, silicon, zirconium, titanium. It may comprise a nitride of at least two or three of these elements, for example a silicon and zirconium nitride, or a silicon and aluminum nitride.
- the layer based on a nitride is a layer based on silicon nitride, more particularly a layer consisting essentially of a silicon nitride.
- the silicon nitride layer When the silicon nitride layer is deposited by sputtering, it generally contains aluminum, because it is customary to dope silicon targets with aluminum in order to accelerate the deposition rates.
- the layer based on a nitride preferably has a physical thickness comprised in a range ranging from 2 to 100 nm, in particular from 5 to 80 nm.
- Nitride-based layers are commonly used in a number of stacks of thin layers because they have advantageous blocking properties, in the sense that they prevent the oxidation of other layers present in the stack, in particular functional layers. which will be described below.
- the stack preferably comprises at least one functional layer, in particular an electrically conductive functional layer.
- the functional layer is preferably comprised between two thin dielectric layers, at least one of which is a nitride-based layer.
- Other possible dielectric layers are for example layers of oxides or oxynitrides.
- At least one electrically conductive functional layer is advantageously chosen from: - the metallic layers, in particular silver or niobium, or even gold, and - the layers of a transparent conductive oxide, chosen in particular from indium and tin oxide, doped tin oxides (for example with fluorine or antimony), doped zinc oxides (for example aluminum or gallium).
- low-emissivity glazing makes it possible in hot weather to reflect part of the solar radiation outwards, and therefore to limit the heating of the passenger compartment of said vehicles, and if necessary to reduce the air conditioning expenses. Conversely, in cold weather, these glazings allow the heat to be retained within the passenger compartment, and therefore reduce the energy cost of heating. It is the same in the case of the glazing equipping the buildings.
- the stack of thin layers comprises at least one layer of silver, in particular one, two or three, or even four layers of silver.
- the physical thickness of the silver layer or, where appropriate, the sum of the thicknesses of the silver layers is preferably between 2 and 50 nm, in particular between 3 and 40 nm.
- the stack of thin layers comprises at least one layer of indium tin oxide. Its physical thickness is preferably between 30 and 200 nm, especially between 40 and 150 nm.
- each of these layers is preferably framed by at least two dielectric layers.
- the dielectric layers are preferably based on oxide, nitride and/or oxynitride of at least one element chosen from silicon, aluminum, titanium, zinc, zirconium and tin.
- At least part of the stack of thin layers can be deposited by various known techniques, for example by chemical vapor deposition (CVD), or by cathode sputtering, in particular assisted by a magnetic field (magnetron process).
- CVD chemical vapor deposition
- cathode sputtering in particular assisted by a magnetic field (magnetron process).
- the stack of thin layers is preferably deposited by sputtering, in particular assisted by magnetic field.
- a plasma is created under a high vacuum in the vicinity of a target comprising the chemical elements to be deposited.
- the active species of the plasma by bombarding the target, tear off said elements, which are deposited on the glass sheet, forming the desired thin layer.
- This process is said to be "reactive" when the layer is made of a material resulting from a chemical reaction between the elements torn from the target and the gas contained in the plasma.
- the major advantage of this process lies in the possibility of depositing on the same line a very complex stack of layers by successively scrolling the glass sheet under different targets, generally in a single device.
- the aforementioned stacks have electricity conduction and infrared reflection properties that are useful for providing a heating function (defrosting, demisting) and/or a thermal insulation function.
- the stack of thin layers When the stack of thin layers is intended to provide a heating function, current leads must be provided. It may in particular be strips of silver paste deposited by screen printing on the stack of thin layers, at the level of two opposite edges of the glass sheet.
- the reflective and transparent mineral coating makes it possible to locally modify the optical properties of the quarter panel in order to create a decor.
- the mineral coating preferably confers a colored appearance, the coloring possibly coming from interference phenomena or from a color in transmission or in reflection of the layer, due for example to the presence of coloring species. In the case of interference, the coloration may only be seen at certain viewing angles, for example at wide angles.
- the decor can be formed with a unique reflective and transparent mineral coating.
- the decor may include several superimposed layers of a mineral coating of the same type.
- the decor can be formed from a plurality of mineral coatings of different natures, possibly superimposed in certain areas.
- neither the first sheet of glass nor the reflective and transparent mineral coating are textured.
- none of them is normally textured.
- the first sheet of glass has a face coated with at least two reflective and transparent mineral coatings forming a decor, identical or different, said at least two mineral coatings being superimposed in at least one zone of said coated face. It was observed that in the superposition zones, the optical effect obtained, in particular the color, was different from that obtained in the zones where a single mineral coating is deposited. It is thus possible, by depositing successively and possibly locally, two coatings, or even three, four or more, to obtain very varied decorations.
- the decoration may comprise a first zone formed solely of a first reflective and transparent mineral coating, a second zone formed solely of a second transparent mineral coating, different from the first, and a third zone formed by the superposition of the first coating. and the second coating.
- the or each reflective and transparent mineral coating is preferably such that the light transmission factor, when it is deposited on clear glass, is between 40 and 95%, in particular between 50 and 80%.
- a clear glass is a glass comprising 0.05 to 0.1% total iron (expressed in the form Fe 2 O 3 ), whose light transmission factor is approximately 90%. Such a glass is notably marketed under the references Planiclear, Planibel Clear or even Optifloat clear.
- the light reflection factor of the quarter panel, seen from face 1 with an angle of incidence of 45°, and in the decorative zone, is preferably between 15 and 40%.
- the light reflection factor of the quarter panel, seen from face 2 with an angle of incidence of 45°, and in the decorative zone, is preferably between 5 and 10%.
- the physical thickness of the or each reflective and transparent mineral coating forming a decoration is preferably between 20 and 250 nm, in particular between 50 and 200 nm, or even between 100 and 150 nm. This is the thickness in the final product, i.e. after a possible baking or sintering step. In some cases, especially when the optical effects are obtained thanks to interference effects, the choice of the thickness makes it possible to adjust the shade obtained.
- the or each reflective and transparent mineral coating is preferably oxide-based.
- the oxide is preferably chosen from the group formed by titanium oxides, silicon oxides, zirconium oxides, tin oxides, zinc oxides, aluminum oxides, indium oxides and transition metal oxides.
- the transition metals are in particular copper, iron, cobalt, chromium and manganese.
- the reflective and transparent mineral coating may have a colored appearance due to the presence of coloring species, such as pigments or metallic particles, for example gold.
- the or each reflective and transparent mineral coating based on oxide is advantageously a sol-gel coating, that is to say a coating obtained by a sol-gel process.
- a sol-gel process typically includes: - the formation of a "sol", that is to say a solution containing at least one precursor of the oxide to be deposited, - the application of this solution on the surface to be coated, - the consolidation or densification of the coating by means of a heat treatment.
- a "sol" that is to say a solution containing at least one precursor of the oxide to be deposited
- the precursor notably comprises salts of the element whose oxide is to be deposited.
- These include organometallic compounds or even nitrates, acetates, chlorides, etc.
- organometallic compounds include alkoxides, for example tetraorthosilicate (TEOS) in the case of a layer of silicon oxide or titanium tetraisopropoxide in the case of a layer of titanium oxide.
- TEOS tetraorthosilicate
- the soil may be partially watery. It preferably comprises an organic solvent, for example an alcohol, chosen in particular from ethanol, isopropanol, butanol and glycols or derivatives of glycols, and mixtures thereof.
- the sol may additionally contain viscosity-regulating agents, such as cellulose ethers or polyacrylates.
- the or each reflective and transparent mineral coating is oxide-based and the deposition step comprises screen printing or digital printing of a precursor of this oxide, in particular of a sol.
- a screen printing screen is placed on the first sheet of glass, which comprises meshes, some of which are closed off, then the composition, in particular the ground, is deposited on the screen, then a doctor blade is applied in order to to force the soil to cross the screen in the zones where the meshes of the screen are not closed, so as to form a moist soil-gel layer.
- the wet coating is preferably dried in order to eliminate the solvent, in particular at a temperature ranging from 100 to 200°C.
- the reflective and transparent mineral coating can then undergo a pre-baking treatment, in particular at a temperature ranging from 550 to 650°C.
- This treatment is particularly useful in the case of additional steps before bending, for example an assembly step with an additional sheet of glass with a view to manufacturing a laminated quarter panel, or even a step of depositing a opaque layer, in particular on the face opposite the face coated with the transparent mineral coating, requiring conveying on the latter face.
- the method can comprise the deposition of a reflective and transparent mineral coating on a part of one face of the first sheet of glass, then a drying and a pre-baking, then a conveying on this face, then the deposition an opaque layer, in particular of enamel, on the other side, then, in the case of a monolithic quarter panel, a bending, or, in the case of a laminated quarter panel, a second pre-baking, the assembly with an additional sheet of glass, the bending of the two sheets of glass together, and finally the lamination.
- the first sheet of glass After the deposition of the reflective and transparent mineral coating, the first sheet of glass, and if necessary the additional sheet of glass, is preferably bent.
- the reflective and transparent mineral coating is a sol-gel layer
- the bending can lead to the densification and consolidation of this layer.
- the bending can in particular be carried out by gravity (the glass deforming under its own weight) or by pressing, at temperatures typically ranging from 550 to 650°C.
- the two sheets of glass are bent separately.
- the first sheet of glass and the additional sheet of glass are bent together.
- the lamination step can be carried out by treatment in an autoclave, for example at temperatures of 110 to 160° C. and under a pressure ranging from 10 to 15 bars. Prior to the autoclave treatment, the air trapped between the glass sheets and the lamination insert can be eliminated by calendering or by depression.
- the additional glass sheet can be made of silico-soda-lime glass, or even of borosilicate or aluminosilicate glass. It can be clear or tinted glass. Its thickness is preferably between 0.5 and 4 mm, in particular between 1 and 3 mm.
- the lamination interlayer preferably comprises at least one sheet of polyvinylacetal, in particular of polyvinylbutyral (PVB). It advantageously consists of such sheets.
- PVB polyvinylbutyral
- the lamination insert can be tinted or untinted in order to regulate the optical or thermal properties of the glazing if necessary.
- the lamination insert can advantageously have sound absorption properties in order to absorb sounds of aerial or solid-borne origin. It may in particular consist for this purpose of three polymeric sheets, including two so-called outer PVB sheets framing an inner polymeric sheet, optionally made of PVB, of lower hardness than that of the outer sheets.
- the lamination insert can also have thermal insulation properties, in particular for reflecting infrared radiation. It may for this purpose comprise a coating of thin layers with low emissivity, for example a coating comprising a thin layer of silver or an alternating coating of dielectric layers of different refractive indices, deposited on an internal PET sheet flanked by two external PVB sheets.
- the thickness of the lamination insert is generally within a range ranging from 0.3 to 1.5 mm, in particular from 0.5 to 1 mm.
- a rear quarter panel was formed from a glass sheet of soda-lime glass, dark green in color, 3.15 mm thick.
- the light transmittance of the glass sheet was 35%.
- a decoration was deposited by screen printing a sol-gel solution of a precursor of titanium oxide on one side of the glass sheet. Drying at 160° C. was then carried out.
- the sheet of glass was then tempered so that the decoration is facing 1 of the quarter panel. After quenching, the physical thickness of the mineral coating was between 50 and 100 nm.
- Table 1 indicates, depending on the angle of incidence relative to the normal (between 15° and 75°), and seen from face 1, the difference in light reflection factor ( ⁇ RL) and color in reflection ( ⁇ L*, ⁇ a*, ⁇ b*, ⁇ E), relative to a sheet of glass of the same nature, but not coated.
- the decoration is therefore clearly visible in reflection as well as in color from face 1, including in grazing incidence.
- Table 3 indicates, depending on the angle of incidence relative to the normal (between 15° and 75°), the difference in light transmission factor ( ⁇ TL) and color in transmission ( ⁇ L*, ⁇ a* , ⁇ b*, ⁇ E), compared to a sheet of glass of the same nature, but not coated.
- the decoration slightly reduces the transparency of the glazing while this reduction in transmission is attenuated in grazing incidence.
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Surface Treatment Of Glass (AREA)
- Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
Abstract
Description
- les couches métalliques, notamment en argent ou en niobium, voire en or, et
- les couches d’un oxyde transparent conducteur, notamment choisi parmi l’oxyde d’indium et d’étain, les oxydes d’étain dopés (par exemple au fluor ou à l’antimoine), les oxydes de zinc dopés (par exemple à l’aluminium ou au gallium).
- la formation d’un « sol », c’est-à-dire d’une solution contenant au moins un précurseur de l’oxyde à déposer,
- l’application de cette solution sur la surface à revêtir,
- la consolidation ou densification du revêtement au moyen d’un traitement thermique.
| 15° | 30° | 45° | 60° | 75° | |
| ΔRL (%) | 16,98 | 16,71 | 16,09 | 14,45 | 9,53 |
| ΔL* | 26,68 | 26,18 | 24,19 | 18,43 | 8,05 |
| Δa* | -0,56 | -0,55 | -0,47 | -0,33 | -0,06 |
| Δb* | -8,624 | -9,04 | -8,71 | -6,65 | -1,67 |
| ΔE | 28,04 | 27,70 | 28,60 | 25,71 | 8,22 |
| 15° | 30° | 45° | 60° | 75° | |
| ΔRL (%) | 2,31 | 2,07 | 1,64 | 0,94 | -0,07 |
| ΔL* | 5,57 | 4,97 | 3,68 | 1,61 | -0,07 |
| Δa* | -4,78 | -4,45 | 3,71 | -1,96 | -0,17 |
| Δb* | -1,02 | -1,31 | -0,93 | -0,35 | 0,19 |
| ΔE | 7,41 | 6,80 | 5,31 | 2,56 | 0,26 |
| 15° | 30° | 45° | 60° | 75° | |
| ΔTL (%) | -7,14 | -6,81 | -6,19 | -5,06 | -2,68 |
| ΔL* | -5,94 | -5,82 | -5,6 | -5,04 | -3,5 |
| Δa* | 1,43 | 1,4 | 1,41 | 1,32 | 0,96 |
| Δb* | 3,21 | 3,23 | 2,97 | 2,32 | 0,76 |
| ΔE | 6,90 | 6,80 | 6,49 | 5,70 | 3,71 |
Claims (15)
- Custode de véhicule automobile comprenant une première feuille de verre destinée à être située du côté extérieur du véhicule, caractérisée en ce que la face destinée à être située du côté extérieur du véhicule, dite face 1, de ladite première feuille de verre est revêtue, sur une partie seulement de celle-ci, d’au moins un revêtement minéral réfléchissant et transparent formant décor.
- Custode selon la revendication 1, comprenant en outre une feuille de verre supplémentaire, destinée à être située du côté intérieur du véhicule, liée adhésivement à la première feuille de verre au moyen d’un intercalaire de feuilletage thermoplastique, notamment à base de polyvinylacétal.
- Custode selon l’une des revendications précédentes, qui est bombée.
- Custode selon l’une des revendications précédentes, dans laquelle le facteur de transmission lumineuse de la première feuille de verre est compris entre 2 et 50%, notamment entre 8 et 45%.
- Custode selon l’une des revendications précédentes, dans laquelle le ou chaque revêtement minéral réfléchissant et transparent est tel que le facteur de transmission lumineuse, lorsqu’il est déposé sur du verre clair, est compris entre 40 et 95%, notamment entre 50 et 80%.
- Custode selon l’une des revendications précédentes, telle que le facteur de réflexion lumineuse de la custode, vu depuis la face 1 avec un angle d’incidence de 45°, et dans la zone de décor, est compris entre 15 et 40%.
- Custode selon l’une des revendications précédentes, telle que la première feuille de verre est revêtue par le revêtement minéral sur 5 à 90%, notamment sur 10 à 80%, de la surface de la face de la feuille de verre.
- Custode selon l’une des revendications précédentes, dans laquelle l’épaisseur physique du ou de chaque revêtement minéral réfléchissant et transparent formant décor est comprise entre 20 et 250 nm, notamment entre 50 et 200 nm.
- Custode selon l’une des revendications précédentes, dans laquelle le ou chaque revêtement minéral réfléchissant et transparent est à base d’oxyde, notamment est un revêtement sol-gel.
- Custode selon la revendication précédente, dans laquelle l’oxyde est choisi dans le groupe formé par les oxydes de titane, les oxydes de silicium, les oxydes de zirconium, les oxydes d’étain, les oxydes de zinc, les oxydes d’aluminium, les oxydes d’indium et les oxydes de métaux de transition.
- Custode selon l’une des revendications précédentes, dans laquelle un revêtement à faible émissivité est déposé sur la face de la première feuille de verre opposée à celle portant le revêtement minéral réfléchissant et transparent et/ou le cas échéant sur une face de la feuille de verre supplémentaire.
- Véhicule automobile comprenant au moins une custode selon l’une des revendications précédentes.
- Procédé d’obtention d’une custode de véhicule automobile selon l’une des revendications 1 à 11, comprenant une étape de dépôt sur une partie seulement d’une face d’une première feuille de verre, d’au moins un revêtement minéral réfléchissant et transparent formant décor.
- Procédé selon la revendication précédente, dans lequel le ou chaque revêtement minéral réfléchissant et transparent est à base d’oxyde, l’étape de dépôt comprenant la sérigraphie ou l’impression numérique d’un précurseur de cet oxyde, notamment d’un sol.
- Procédé selon l’une des revendications 13 ou 14, comprenant le dépôt d’un revêtement minéral réfléchissant et transparent sur une partie d’une face de la première feuille de verre, puis un séchage et une pré-cuisson, puis un convoyage sur cette face, puis le dépôt d’une couche opaque, notamment d’émail, sur l’autre face, puis, dans le cas d’une custode monolithique, un bombage, ou, dans le cas d’une custode feuilletée, une deuxième pré-cuisson, l’assemblage avec une feuille de verre supplémentaire, le bombage des deux feuilles de verre ensemble, et enfin le feuilletage.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP22769718.2A EP4396145A1 (fr) | 2021-08-30 | 2022-08-30 | Custode de véhicule automobile comprenant une feuille de verre |
| CN202280006273.XA CN116406347B (zh) | 2021-08-30 | 2022-08-30 | 包括玻璃片材的机动车辆角玻璃窗 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FRFR2109020 | 2021-08-30 | ||
| FR2109020A FR3126412B1 (fr) | 2021-08-30 | 2021-08-30 | Custode de véhicule automobile comprenant une feuille de verre |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2023031223A1 true WO2023031223A1 (fr) | 2023-03-09 |
Family
ID=78332888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2022/074117 Ceased WO2023031223A1 (fr) | 2021-08-30 | 2022-08-30 | Custode de véhicule automobile comprenant une feuille de verre |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4396145A1 (fr) |
| CN (1) | CN116406347B (fr) |
| FR (1) | FR3126412B1 (fr) |
| WO (1) | WO2023031223A1 (fr) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011085995A1 (fr) * | 2010-01-14 | 2011-07-21 | Schott Ag | Matériau composite à base de verre ou vitrocéramique et son procédé de fabrication |
| WO2014009667A1 (fr) * | 2012-07-13 | 2014-01-16 | Saint-Gobain Glass France | Vitrage translucide comprenant au moins un motif, de preference transparent |
| FR3015973A1 (fr) * | 2013-12-31 | 2015-07-03 | Saint Gobain | Vitrage lumineux avec isolateur optique et sa fabrication |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7588829B2 (en) * | 2002-05-31 | 2009-09-15 | Ppg Industries Ohio, Inc. | Article having an aesthetic coating |
-
2021
- 2021-08-30 FR FR2109020A patent/FR3126412B1/fr active Active
-
2022
- 2022-08-30 WO PCT/EP2022/074117 patent/WO2023031223A1/fr not_active Ceased
- 2022-08-30 EP EP22769718.2A patent/EP4396145A1/fr active Pending
- 2022-08-30 CN CN202280006273.XA patent/CN116406347B/zh active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011085995A1 (fr) * | 2010-01-14 | 2011-07-21 | Schott Ag | Matériau composite à base de verre ou vitrocéramique et son procédé de fabrication |
| WO2014009667A1 (fr) * | 2012-07-13 | 2014-01-16 | Saint-Gobain Glass France | Vitrage translucide comprenant au moins un motif, de preference transparent |
| FR3015973A1 (fr) * | 2013-12-31 | 2015-07-03 | Saint Gobain | Vitrage lumineux avec isolateur optique et sa fabrication |
Also Published As
| Publication number | Publication date |
|---|---|
| EP4396145A1 (fr) | 2024-07-10 |
| FR3126412A1 (fr) | 2023-03-03 |
| FR3126412B1 (fr) | 2024-05-24 |
| CN116406347A (zh) | 2023-07-07 |
| CN116406347B (zh) | 2025-08-22 |
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