WO2018051047A1 - Vitrage muni d'une couche de protection temporaire et d'un logo ou motif imprime - Google Patents
Vitrage muni d'une couche de protection temporaire et d'un logo ou motif imprime Download PDFInfo
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- WO2018051047A1 WO2018051047A1 PCT/FR2017/052497 FR2017052497W WO2018051047A1 WO 2018051047 A1 WO2018051047 A1 WO 2018051047A1 FR 2017052497 W FR2017052497 W FR 2017052497W WO 2018051047 A1 WO2018051047 A1 WO 2018051047A1
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- Prior art keywords
- enamel
- temperature
- glass
- protective layer
- substrate according
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Classifications
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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
- C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
- C03C17/42—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 of an organic material and at least one non-metal coating
-
- 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
- C03C17/02—Surface treatment of glass, not in the form of fibres or filaments, by coating with glass
- C03C17/04—Surface treatment of glass, not in the form of fibres or filaments, by coating with glass by fritting glass powder
-
- 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
- C03C17/28—Surface treatment of glass, not in the form of fibres or filaments, by coating with organic material
- C03C17/32—Surface treatment of glass, not in the form of fibres or filaments, by coating with organic material with synthetic or natural resins
- C03C17/328—Polyolefins
-
- 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
- C03C8/00—Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions
- C03C8/14—Glass frit mixtures having non-frit additions, e.g. opacifiers, colorants, mill-additions
-
- 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
- C03C2217/40—Coatings comprising at least one inhomogeneous layer
- C03C2217/43—Coatings comprising at least one inhomogeneous layer consisting of a dispersed phase in a continuous phase
- C03C2217/44—Coatings comprising at least one inhomogeneous layer consisting of a dispersed phase in a continuous phase characterized by the composition of the continuous phase
- C03C2217/445—Organic continuous phases
-
- 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
- C03C2217/40—Coatings comprising at least one inhomogeneous layer
- C03C2217/43—Coatings comprising at least one inhomogeneous layer consisting of a dispersed phase in a continuous phase
- C03C2217/46—Coatings comprising at least one inhomogeneous layer consisting of a dispersed phase in a continuous phase characterized by the dispersed phase
- C03C2217/47—Coatings comprising at least one inhomogeneous layer consisting of a dispersed phase in a continuous phase characterized by the dispersed phase consisting of a specific material
- C03C2217/475—Inorganic materials
-
- 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
- C03C2217/00—Coatings on glass
- C03C2217/70—Properties of coatings
- C03C2217/78—Coatings specially designed to be durable, e.g. scratch-resistant
-
- 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
- C03C2218/30—Aspects of methods for coating glass not covered above
- C03C2218/32—After-treatment
- C03C2218/328—Partly or completely removing a coating
-
- 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
- C03C2218/30—Aspects of methods for coating glass not covered above
- C03C2218/355—Temporary coating
Definitions
- the present invention relates to a glass or glass-ceramic substrate comprising both a polymeric coating for protecting it and a logo or printed pattern that is durable and of good quality resistant to heat treatment during which the polymeric coating is burned.
- This type of substrate is used in the automotive and building industries. The method of manufacturing a substrate coated with a logo or a printed pattern is also described.
- the glass substrate comprises a functional coating for imparting optical, thermal and / or electrical properties.
- functional coatings are based on thin layers, such as for example silver-based metal layers, which remain fragile in particular by a high ability to strip and also may be subject to corrosion during storage, in particular in a humid environment.
- the patent application FR 3009302 discloses the protection of the substrate coated with a polymeric temporary protective layer, insoluble in water, which is removed during a heat treatment of the coated substrate, in particular during quenching, annealing and / or bending at a sufficient temperature (at least 300 ° C and generally above 400 ° C) to allow its removal by thermal decomposition.
- the protective layer described in this patent application is obtained from a liquid composition comprising (meth) acrylate compounds chosen from monomers, oligomers or polymers comprising at least one (meth) acrylate function, which is then hardened. by drying, UV irradiation or electron beam. It is applied at the output of the manufacturing line substrates bearing functional coatings.
- coated substrates protected from their manufacture until their arrival at the transformer which performs the cutting of the substrate to the desired dimensions and the ultimate heat treatments necessary to obtain the desired finished product.
- One of the usual heat treatments that these types of substrates undergo is quenching at temperatures of at least 500 ° C to improve the mechanical strength of the final product.
- it is very often mandatory to mark the glazing by applying a logo directly on the coated substrate.
- the printed logo or pattern must be clearly legible on the glazing and must remain legible throughout the life of the product.
- the printing of the logo or design is done by applying a layer of enamel, usually by screen printing, directly on the coated glass and thus protected by the protective layer polymer. At the place where the logo is printed, the temporary protective layer is trapped under the enamel layer, which makes its removal difficult during the subsequent heat treatment to obtain a finished product.
- the enamel used to print the logo or pattern consists of a mixture of glass frit (thus vitreous phase), inorganic pigments and organic components, which are a mixture of diluent (organic solvent) and an organic medium (most often based on resin dissolved in a solvent), which ensures a good suspension of all the inorganic particles and thus its application in the liquid state.
- organic component including both solvents or diluents and the organic medium.
- the enamel baking step is most often carried out during the subsequent thermal treatments that the coated substrate undergoes, and especially during quenching, annealing and / or bending, and therefore at a temperature sufficient to allow removal of organic components and attachment of inorganic particles to the substrate.
- the drying stage is often non-existent and enamel is directly cooked during heat treatments at high temperature.
- the elimination of the organic components of the enamel and its baking therefore takes place during the same heat treatment that eliminates the temporary protective layer. It has appeared that, in some cases with standard enamels, for substrates having a temporary protective layer, defects have been observed on the finished product, therefore after enamel firing and elimination of the temporary layer. These defects can be of different types and reveal either enamel adhesion problems, resulting for example in a low scratch resistance or problems of spreading or bubbling of the enamel layer resulting in poor resolution of the logo or pattern printed on the finished product after heat treatment at high temperature.
- the present invention relates to a substrate protected by a temporary protective layer which is not soluble in water, comprising an enamel layer deposited on the temporary protective layer which, after a heat treatment for example quenching, to obtain a pattern printed on the substrate which is stable and resistant to glass processing steps such as annealing, bending and / or quenching during which the temporary protective layer is removed and the layer enamel is cooked.
- the printed pattern must indeed have a correct readability and its adhesion to the substrate must withstand the machines used for washing.
- the invention relates to a glass or glass-ceramic substrate comprising, on at least a part of one of its faces, at least:
- a water-insoluble polymeric temporary protective layer to be removed by heat treatment during substrate processing such as annealing, bending and / or quenching, and an enamel layer consisting of a mixture of glass frit, inorganic pigments and organic components deposited on at least a part of the protective layer, said enamel being characterized by the fact that:
- Tg glass transition temperature
- Tc 6 o% defined as being the temperature at which 60% of the initial mass of the protective layer has burned, said Tc 6 o% being determined by thermogravimetric analysis under the air
- the inflection temperature being defined as the temperature at which the speed of movement measured by thermomechanical analysis of the enamel is maximum
- the content of inorganic pigments entering the total composition of the enamel is less than 35% by weight.
- the enamel used to print the logo or pattern includes vitrifiable glass frit and is therefore characterized by a glass transition temperature.
- a glass frit is generally obtained from a mixture of molten oxides at high temperature and rapidly cooled in the form of powder or sintered; the frit obtained can be brought to the liquid state by heating at a temperature above its glass transition temperature Tg.
- the composition of the glass frit has a particular influence on the value of the glass transition temperature.
- the glass frit is dispersed in organic components that will burn during the heat treatment that the enamel undergoes allowing the frit to be fixed permanently to the glass substrate. During this heat treatment, generally performed at temperatures above 400 ° C, or even above 500 ° C, all of the organic components present in the enamel will burn. The combustion is done gradually according to the temperature of the heat treatment.
- the polymeric layer of temporary protection is consumed from an initial combustion temperature Tci which depends on its composition.
- Tci initial combustion temperature
- the transformation of the substrate during which the polymeric protective layer is burned is a treatment of annealing, quenching and / or bending type. These treatments are usually carried out at high temperatures, above 500 ° C., or even above 600 ° C. They are carried out to give the substrates the desired properties, for example in terms of mechanical strength, depending on the desired applications.
- Tcx is the temperature at which x% of the initial mass of the temporary protective layer was burned.
- Tc 6 o% corresponds to the temperature at which 60% of the initial mass of the temporary protective layer was burned. It is essential to meet the expectations in terms of adhesion and legibility of the logo that a significant amount of the temporary polymeric protective layer burns at a temperature below the glass transition temperature of the enamel used to apply the logo.
- the enamel used in the context of the present invention is such that the temperature Tc 6 o%, at which 60% of the initial mass of the temporary protective layer has burned, is less than the glass transition temperature Tg of enamel.
- thermogravimetric analysis TGA
- TGA thermogravimetric analysis
- This measurement makes it possible to determine a percentage of mass loss of the analyzed product as a function of the temperature and the analyzer establishes a graph giving the variation of this mass percentage as a function of the temperature.
- the heat-up cycle up to 600 ° C., generally 95% of the initial mass of the organic polymer constituting the temporary protective layer is burned.
- the burning temperature as a function of the percentage of product consumed is directly deduced from the graph in the case of the organic polymer constituting the temporary protective layer.
- the organic components are a mixture of solvent and / or diluent and resin and the burning temperatures of these organic species are measured at the peaks of the first order derivative of the graph.
- the enamel has a maximum shrinkage ratio, measured by thermomechanical analysis between 450 ° C and 650 ° C which is greater than 20%.
- the shrinkage rate reflects in particular the densification of enamel during sintering.
- the densification of enamel can be deduced by thermomechanical analysis which is, like thermogravimetric analysis, a thermal analysis technique. This analysis makes it possible to measure the dimensional variations of a sample as a function of the temperature, the time and a constant force applied to the sample.
- This technique is used in particular to determine the glass transition temperature Tg of the enamel and also its sintering temperature since the sintering results in a decrease in length or in a shrinkage and a decrease in the porosity (hence a densification).
- the samples are placed in the analyzer and subjected to a rise in temperature, for example 10 ° C./min between the ambient temperature and 650 ° C. under a constant force of 0.1 N. A displacement in millimeters is then measured.
- the curve of variation of the displacement expressed in mm as a function of the temperature presents a plateau (no or few dimensional variations) then a brutal decrease from a certain temperature which corresponds to the glass transition temperature Tg, which reflects a significant dimensional change of the sample from this precise point.
- the temperature from which a change of slope is noted on the graph corresponds to the value of Tg.
- Tg the temperature at which a change of slope is noted on the graph.
- the measurement of the displacement as a function of the temperature is compared with the initial length of the sample L 0 , at a determined temperature (in this case 450 ° C.).
- the shrinkage corresponding to the relative variation of length AL / L 0 is expressed as a percentage, the value L 0 corresponding to the displacement measured at 450 ° C.
- the maximum enamel shrinkage during the heat-up cycle, and in particular between 450 ° C. and 650 ° C., is determined as the percentage of densification between 450 ° C. (end of the initial plateau) and the maximum temperature corresponding to the final plateau for which no more displacement is observed.
- the enamel is characterized in that the temperature difference between T in fiexion and Tg glass transition temperature is below 60 ° C, the Tinfiexion temperature being defined as the temperature at which the measured travel speed by thermomechanical analysis of the enamel is maximum.
- the temperature T in fiexion is determined from thermomechanical analysis and corresponds to the lowest point (minimum of the peak) of the derivative of order 1 of the curve giving the displacement in millimeters as a function of temperature.
- the enamel used for printing the logo is also characterized by the fact that the mass concentration of inorganic pigments is less than 35% by weight relative to the total composition of the enamel.
- inorganic pigments it is understood that we speak of oxides having a power dye. There may be mentioned, for example, titanium oxide, zirconium oxide or tin oxide. Indeed, a limited amount of pigments improves the homogeneity of the enamel once it is cooked. During the heat treatment, the inorganic pigment particles present in the enamel are encapsulated by the glass frit and a limited quantity of this type of particles makes it possible not to disturb the adhesion of the enamel layer to the glass substrate.
- the mass percentage of pigments present in the enamel layer is measured by X-ray fluorescence, which allows the detection of chemical elements and the semi-quantitative estimation.
- X-ray fluorescence consists of sending X-rays on the sample to a power of 4kW, with angular goniometer scanning.
- the gases used for the detectors are a mixture of argon and methane.
- the mass percentage of pigments given corresponds to the sum of all the pigments contained in the enamel. It is a total percentage by weight of the pigments entering into the composition of the enamel.
- the glass frit of the enamel may for example be a borosilicate of bismuth or a zinc borosilicate.
- the composition of the frit can be adapted.
- Zinc borosilicates generally have a higher Tg than bismuth borosilicates and will therefore generally be preferred.
- the addition of silica and alumina has the effect of increasing the Tg of the frit, while the boron oxide and the alkali oxides reduce the Tg.
- the organic components of the enamel burn on a surface. temperature range below the burn temperature range of the temporary protection layer.
- the softening and sintering of the glass frit entering the composition of the enamel intervenes at a higher temperature than the temperature at which a large quantity (at least 60% of the initial mass of the temporary protective layer, preferably at least 75% and even more preferably at least 85%) s is consumed.
- the enamel layer retains sufficient porosity that allows good combustion and removal of the temporary protective layer trapped under the enamel layer.
- the vitreous transition and the sintering of the enamel appear after having burned at least 60% of the initial mass of the temporary protective layer, preferably at least 75% of its initial mass and even more preferably at least 85% of its initial mass. which allows the enamel to have a sufficient contact area with the glass substrate.
- the adhesion of the printed logo or pattern, after heat treatment, is thus significantly improved.
- the substrate according to the present invention comprises a temporary protective layer which is a polymeric film, which is made to disappear during thermal processing glass processing.
- the temperature from which the combustion is initiated is referred to in the invention as the "initial combustion temperature” and is denoted Tci, depending on the chemical composition of the polymeric protective layer.
- the temporary protective layer is based on a polymer insoluble in water.
- the temporary protective layer may for example be a layer obtained by curing a liquid composition comprising (meth) acrylate or polyurethane compounds.
- This type of layer is described in particular in the patent application FR 3009302 and is obtained from monofunctional and polyfunctional (meth) acrylates such as mono-, di-, tri-, polyfunctional (meth) acrylates.
- the liquid composition for obtaining the polymeric layer may for example comprise an aliphatic urethane-acrylic oligomer, a mono-, bi- and / or trifunctional (meth) acrylate monomer and a polymerization initiator.
- the thickness of the temporary protective layer measured after polymerization and hardening, is between 1 and 30 ⁇ . Advantageously, it is between 2 and 25 ⁇ and even more preferably between 5 and 20 ⁇ . If the layer is too thick, the adhesion of the enamel layer is made delicate and the legibility of the logo does not meet expectations.
- the enamel is characterized in that its glass transition temperature Tg is greater than the temperature Tc 75 %, defined as the temperature at which 75% of the initial mass of the protective layer has burned. , Tc 5 % being determined by thermogravimetric analysis under air.
- the enamel is characterized in that its glass transition temperature Tg is greater than the temperature Tc 8 5%, defined as the temperature at which 85% of the initial mass of the protective layer is consumed, Tc 85 % being determined by thermogravimetric analysis under air.
- the enamel becomes denser over a temperature range of range such that the temperature difference between T in fiexion and the glass transition temperature Tg is less than or equal to 50 ° C, the temperature T in fiexion being defined as the temperature at which the displacement velocity measured by thermomechanical analysis of the enamel is maximum.
- the enamel layer comprises less than 20% by weight of pigments relative to the total composition of the enamel.
- the enamel layer comprises less than 45% by weight of organic components present in the enamel compared to the total sum of the constituents of the enamel.
- the amount of organic components present in the enamel is less than 35% by weight and even more preferably 30% by weight relative to the total sum of the constituents of the enamel.
- the substrate according to the present invention is a glass or glass-ceramic substrate.
- the substrate according to the present invention comprises a functional coating on the glass or on the vitroceramic, under the temporary protective layer. This coating is intended to give the substrate optical properties (mirror or antireflection layers), thermal (low-emissive layers, solar control or sunscreen layers) or electrical (transparent conductive layers, antistatic layers, electrochromic layers).
- the substrate according to the present invention may for example be manufactured by applying in a first step, on at least a portion of the glass substrate, a composition capable of forming the temporary protective layer by crosslinking or polymerization.
- This composition may for example be a liquid composition comprising methacrylate compounds.
- a second step is to print the logo or pattern by printing, directly on the temporary protective layer, an enamel paste deposited by screen printing, the viscosity of the enamel measured at 20 ° C being between 5 and 50 Not.
- the viscosity of the enamel paste is between 10 and 40 Pa.s, and even more preferably between 15 and 20 Pa.s.
- the viscosity measurements of enamel pastes are measured using a Haake TM Viscotester TM 550 rotary viscometer at a temperature of 20 ° C., equipped with a mobile cylinder E30 (rotation speed 23 r / sec). min).
- the enamel paste used to print the logo has the characteristics described above, in terms of the amount of organic components (content less than 45% by weight relative to the total sum of the constituents of the enamel paste) and term of physicochemical properties (the vitreous transition temperature Tg of the enamel is greater than the temperature Tc 6 o % , measured by thermogravimetric analysis under air and defined as being the temperature at which 60% of the initial mass of the layer temporary protection burned).
- the enamel paste Before each application, the enamel paste must be vigorously mixed to ensure a good homogeneity of the dough before application.
- the mixture is for example mixed with the spatula. If several printing steps are required for logo printing, a step of mixing and homogenizing the enamel paste before each printing step is necessary.
- the enamel paste is applied to the temporary protection layer through a screen screen which is composed of a frame on which is stretched a fabric, whose mesh is drawn for example between 10 and 20 N, with a grids for example between 77 and 120 threads / cm.
- the diameter of the wires is usually between 0.34 and 0.55 ⁇ .
- Screen printing is performed through the screen, using a squeegee which makes contact with the substrate to be printed thanks to the elasticity of the mesh.
- a squeegee of Shore hardness between 60 and 95 is used to perform the screen printing step to ensure contact between the substrate and the enamel paste layer to be applied.
- the present invention also relates to a method of manufacturing a glass or glass-ceramic substrate on which a logo or pattern is printed comprising a heat treatment step at a temperature above 400 ° C of the substrate as described above.
- the heat treatment is preferably quenching.
- the glass substrates used hereinafter are glass substrates about 6 mm thick obtained by a floating process (also known as "float") which consists in pouring the molten glass on a bath of water. 'tin.
- a protective polymeric film is obtained by curing a liquid composition based on oligomers and monomers comprising at least one acrylate function, marketed by Sartomer.
- the liquid composition is a mixture of CN9276 (tetrafunctional aliphatic urethane-acrylate oligomer), SR351 (trimethylolpropane triacrylate), and SR833S (tricyclodecane dimethanol diacrylate) and is described in the application FR3009302.
- This film deposited on the glass substrate corresponds to the temporary protective layer.
- Thermogravimetric analysis (TGA) of this film is performed by placing 2 mg of scraped polymer on the surface of a glass substrate coated with the polymeric film in a platinum crucible.
- the sample is placed in the TA Instrument Q50 analyzer (TGA) under an air flow of 60 mL / min and is heated to between 20 ° C and 600 ° C, increasing the temperature by 10 ° C / min.
- the analyzer measures the mass variation of the sample as a function of temperature. The curve obtained is given in FIG. 1. It is noted that the initial combustion temperature Tci of this polymeric layer is 295 ° C.
- the temperatures Tc 6 o%, Tc 75 % and Tc 8 5% of the polymeric film constituting the temporary protective layer are respectively 400 ° C, 465 ° C and 510 ° C.
- Enamels 1 to 6 Silkscreen printing tests were carried out using different enamels (enamels 1 to 6) whose characteristics are given below.
- Enamels 1 (enamel 194020 of the company Ferro)
- 2 enamel DV775370 of the company PMI
- 5 and 6 enamel 194011 of the Ferro company
- contain zinc borosilicate frits and enamels 3 (enamel 194120 of the Ferro company) and 4 borosilicate bismuth frits.
- the analyzes performed on enamels are as follows:
- thermomechanical analysis with a Perkin TMA4000 analyzer
- Thermogravimetric analysis with a Q50 analyzer of TA instrument to determine the content of organic components of the enamel, -Fluorescence X to determine the total mass percentage of pigment in the composition of the enamel, made with a PANalytocal Axios analyzer .
- a powdered enamel sample is prepared in the form of a 25 mg tablet.
- the organic constituents (organic medium) of the enamel were previously dried and burned in a radiative oven at 450 ° C.
- the pellets are prepared in hydraulic press under 4N pressure in a cylinder of 6 mm in diameter.
- the pellet is then placed in the analyzer between two quartz disks 6 mm in diameter and 1 mm in height.
- the temperature is then increased from 20 ° C to 650 ° C at a rate of 10 ° C / min, under a constant pressure of 0.1 N applied to the sample.
- the curve representing the measurement of displacement (in mm) as a function of the temperature as well as the derivative with order 1 of this curve are given in FIG. 2 for the enamel 1.
- enamel Enamels 1 to 6 have an organic component content of less than 45% by weight relative to the total composition of the enamel.
- a layer of each of the various enamels is deposited by screen printing on the substrates coated with the polymeric protective layer described above.
- the following samples were made by enamel deposition by screen printing in an air-conditioned room, using a screen with mesh 77.55 and a squeegee of hardness shore 65.
- the enamels were mixed and put in viscosity at 15 Pa.s at 20 ° C upstream of the deposit.
- the samples thus enamelled are dried in an IR dryer raised to a set point of 160 ° C. before undergoing a quench type heat treatment in a radiative and convective oven at a temperature of 690 ° C.
- the enamelled patterns are printed on the glass substrate in the form of a strip of about 17 mm and a square of about 6 mm side.
- the samples which respectively comprise enamel 1 or 2 are in accordance with the invention while those comprising one of enamels 3 to 6 are given for comparison.
- the samples comprising enamels 1 and 2 have both good enamel adhesion and good legibility of the logo.
- the samples comprising enamels 3 to 6 do not give satisfactory results.
- the enamel 3 has a shrinkage too low, resulting in heterogeneous sintering.
- Enamel 4 has a temperature T in fiexion too far from its glass transition temperature Tg (Tin ection-Tg 64 ° C). Its densification is too slow, the sintering intervening too much quickly.
- Enamels 3 and 4 also have a glass transition temperature close to the combustion of the polymeric protective layer: the softening of the glass frit entering their composition and their densification occur while the polymeric layer of temporary protection is not not yet burned enough. This is reflected in particular by the appearance of bubbles in the enamel layer. Unbreated organic material residues from the polymeric layer interpose between the glass substrate and the densified enamel, resulting in poor adhesion thereof.
- Comparative enamel has both a large amount of inorganic pigments in its composition (37% by weight relative to the total composition) and also a temperature T in fiexion too far from its glass transition temperature Tg ( Tin exion-Tg 66 ° C). This enamel has a kinetics of shrinkage thus of slow densification and a sintering which intervenes too late compared to its cycle of cooking. The presence of a large quantity of pigments used in the composition of the enamel disturbs the adhesion of the glass frit to the substrate and results in poor adhesion of the enamel layer.
- Enamel 6 also given for comparison, also has too much pigments (40%), and too little shrinkage. The adhesion to the substrate is very bad.
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- General Chemical & Material Sciences (AREA)
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Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201780057503.4A CN109790068A (zh) | 2016-09-19 | 2017-09-19 | 提供有临时保护层和印刷徽标或图案的窗玻璃 |
BR112019003553A BR112019003553A2 (pt) | 2016-09-19 | 2017-09-19 | vidraça munida com uma camada de proteção temporária e de um logotipo ou padrão impresso |
RU2019111669A RU2019111669A (ru) | 2016-09-19 | 2017-09-19 | Остекление, снабженное временным защитным слоем и печатным логотипом или рисунком |
US16/334,210 US20190276354A1 (en) | 2016-09-19 | 2017-09-19 | Glazing provided with a temporary protective layer and with a printed logo or pattern |
EP17780491.1A EP3515873A1 (fr) | 2016-09-19 | 2017-09-19 | Vitrage muni d'une couche de protection temporaire et d'un logo ou motif imprime |
MX2019003102A MX2019003102A (es) | 2016-09-19 | 2017-09-19 | Acristalamiento proporcionado con una capa protectora temporal y con un logotipo o patron impreso. |
KR1020197011219A KR20190055174A (ko) | 2016-09-19 | 2017-09-19 | 일시적인 보호층과 인쇄된 로고 또는 패턴을 갖는 글레이징 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1658765A FR3056207B1 (fr) | 2016-09-19 | 2016-09-19 | Vitrage muni d'une couche de protection temporaire et d'un logo ou motif imprime |
FR1658765 | 2016-09-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2018051047A1 true WO2018051047A1 (fr) | 2018-03-22 |
Family
ID=57750099
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2017/052497 WO2018051047A1 (fr) | 2016-09-19 | 2017-09-19 | Vitrage muni d'une couche de protection temporaire et d'un logo ou motif imprime |
Country Status (9)
Country | Link |
---|---|
US (1) | US20190276354A1 (fr) |
EP (1) | EP3515873A1 (fr) |
KR (1) | KR20190055174A (fr) |
CN (1) | CN109790068A (fr) |
BR (1) | BR112019003553A2 (fr) |
FR (1) | FR3056207B1 (fr) |
MX (1) | MX2019003102A (fr) |
RU (1) | RU2019111669A (fr) |
WO (1) | WO2018051047A1 (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2020183019A1 (fr) * | 2019-03-14 | 2020-09-17 | Saint-Gobain Glass France | Procede de protection d'un substrat en verre revetu d'un empilement electrochrome et procede de fabrication d'un vitrage isolant |
US12007658B2 (en) | 2019-03-14 | 2024-06-11 | Saint-Gobain Glass France | Method for protecting a glass substrate coated with an electrochromic stack and method for producing an insulating glazing |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20220194056A1 (en) * | 2019-04-16 | 2022-06-23 | Corning Incorporated | Filled-pore decorative layer for ion exchange and automotive glass |
FR3101345B1 (fr) * | 2019-09-30 | 2021-09-24 | Saint Gobain | Procédé d’obtention d’un vitrage bombé feuilleté |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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US20070042177A1 (en) * | 2004-05-17 | 2007-02-22 | Tokyo Ohka Kogyo Co., Ltd. | Composition for dielectric of plasma display, laminate for dielectric, and method for forming the dielectric |
FR3009302A1 (fr) | 2013-08-05 | 2015-02-06 | Saint Gobain | Substrat portant un revetement fonctionnel et une couche de protection temporaire |
WO2015170047A1 (fr) * | 2014-05-07 | 2015-11-12 | Saint-Gobain Recherche | Verre émaillé trempable á tenue mécanique améliorée |
Family Cites Families (5)
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WO2009087217A1 (fr) * | 2008-01-10 | 2009-07-16 | Ocas Onderzoekscentrum Voor Aanwending Van Staal N.V. | Procédé de fabrication d'un substrat d'acier émaillé |
EP2316799A1 (fr) * | 2009-10-30 | 2011-05-04 | AGC Glass Europe | Feuille de verre revêtue |
EA201491705A1 (ru) * | 2012-03-15 | 2014-12-30 | Агк Гласс Юроп | Лист стекла с покрытием на основе эмали |
CN102976624B (zh) * | 2012-12-07 | 2015-07-15 | 天津耀皮工程玻璃有限公司 | 一种图案镀膜玻璃及其制备方法 |
FR3010992B1 (fr) * | 2013-09-20 | 2021-01-01 | Saint Gobain | Verre email trempable |
-
2016
- 2016-09-19 FR FR1658765A patent/FR3056207B1/fr not_active Expired - Fee Related
-
2017
- 2017-09-19 EP EP17780491.1A patent/EP3515873A1/fr not_active Withdrawn
- 2017-09-19 BR BR112019003553A patent/BR112019003553A2/pt not_active Application Discontinuation
- 2017-09-19 WO PCT/FR2017/052497 patent/WO2018051047A1/fr unknown
- 2017-09-19 CN CN201780057503.4A patent/CN109790068A/zh active Pending
- 2017-09-19 MX MX2019003102A patent/MX2019003102A/es unknown
- 2017-09-19 KR KR1020197011219A patent/KR20190055174A/ko unknown
- 2017-09-19 RU RU2019111669A patent/RU2019111669A/ru not_active Application Discontinuation
- 2017-09-19 US US16/334,210 patent/US20190276354A1/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070042177A1 (en) * | 2004-05-17 | 2007-02-22 | Tokyo Ohka Kogyo Co., Ltd. | Composition for dielectric of plasma display, laminate for dielectric, and method for forming the dielectric |
FR3009302A1 (fr) | 2013-08-05 | 2015-02-06 | Saint Gobain | Substrat portant un revetement fonctionnel et une couche de protection temporaire |
WO2015170047A1 (fr) * | 2014-05-07 | 2015-11-12 | Saint-Gobain Recherche | Verre émaillé trempable á tenue mécanique améliorée |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2020183019A1 (fr) * | 2019-03-14 | 2020-09-17 | Saint-Gobain Glass France | Procede de protection d'un substrat en verre revetu d'un empilement electrochrome et procede de fabrication d'un vitrage isolant |
FR3093720A1 (fr) * | 2019-03-14 | 2020-09-18 | Saint-Gobain Glass France | Procédé de protection d’un substrat en verre revêtu d’un empilement électrochrome et procédé de fabrication d’un vitrage isolant |
US20220163862A1 (en) * | 2019-03-14 | 2022-05-26 | Saint-Gobain Glass France | Method for protecting a glass substrate coated with an electrochromic stack and method for producing an insulating glazing |
US12007658B2 (en) | 2019-03-14 | 2024-06-11 | Saint-Gobain Glass France | Method for protecting a glass substrate coated with an electrochromic stack and method for producing an insulating glazing |
Also Published As
Publication number | Publication date |
---|---|
BR112019003553A2 (pt) | 2019-05-21 |
CN109790068A (zh) | 2019-05-21 |
US20190276354A1 (en) | 2019-09-12 |
EP3515873A1 (fr) | 2019-07-31 |
KR20190055174A (ko) | 2019-05-22 |
FR3056207A1 (fr) | 2018-03-23 |
RU2019111669A (ru) | 2020-10-19 |
FR3056207B1 (fr) | 2018-09-07 |
MX2019003102A (es) | 2019-06-10 |
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