WO2017162954A1 - Process for manufacturing painted or lacquered glass - Google Patents

Process for manufacturing painted or lacquered glass Download PDF

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Publication number
WO2017162954A1
WO2017162954A1 PCT/FR2017/050571 FR2017050571W WO2017162954A1 WO 2017162954 A1 WO2017162954 A1 WO 2017162954A1 FR 2017050571 W FR2017050571 W FR 2017050571W WO 2017162954 A1 WO2017162954 A1 WO 2017162954A1
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WO
WIPO (PCT)
Prior art keywords
glass sheet
liquid composition
layer
speed
organic binder
Prior art date
Application number
PCT/FR2017/050571
Other languages
French (fr)
Inventor
Fabio FOTI
Guillaume LEQUIPPE
Laurence SIGOGNAULT
Edouard JONVILLE
Original Assignee
Saint-Gobain Glass France
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Saint-Gobain Glass France filed Critical Saint-Gobain Glass France
Priority to BR112018067728A priority Critical patent/BR112018067728A2/en
Priority to MX2018011520A priority patent/MX2018011520A/en
Priority to KR1020187027143A priority patent/KR20180122639A/en
Priority to EP17714857.4A priority patent/EP3433214A1/en
Publication of WO2017162954A1 publication Critical patent/WO2017162954A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B05D5/06—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain multicolour or other optical effects
    • 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
    • C03C17/006—Surface treatment of glass, not in the form of fibres or filaments, by coating with materials of composite character
    • C03C17/008—Surface treatment of glass, not in the form of fibres or filaments, by coating with materials of composite character comprising a mixture of materials covered by two or more of the groups C03C17/02, C03C17/06, C03C17/22 and C03C17/28
    • C03C17/009—Mixtures of organic and inorganic materials, e.g. ormosils and ormocers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/20—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by magnetic fields
    • B05D3/207—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by magnetic fields post-treatment by magnetic fields
    • 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
    • C03C17/006—Surface treatment of glass, not in the form of fibres or filaments, by coating with materials of composite character
    • C03C17/007—Surface treatment of glass, not in the form of fibres or filaments, by coating with materials of composite character containing a dispersed phase, e.g. particles, fibres or flakes, in a continuous phase
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2203/00—Other substrates
    • B05D2203/30—Other inorganic substrates, e.g. ceramics, silicon
    • B05D2203/35—Glass
    • 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
    • C03C2217/479—Metals
    • 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
    • C03C2217/48—Coatings comprising at least one inhomogeneous layer consisting of a dispersed phase in a continuous phase characterized by the dispersed phase having a specific function
    • C03C2217/485—Pigments
    • 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

Definitions

  • the present invention relates to a method for manufacturing painted or lacquered glass comprising a step of creating visible patterns in the paint or lacquer layer by orientation and / or displacement of magnetizable particles by means of a magnetic field.
  • the exposure of the magnetizable particles contained in the liquid composition to the magnetic field lines causes a change in the organization of the particles and the creation of visible patterns by concentration or selective orientation of the particles.
  • the permanent magnets or electromagnets are integrated in the surface of at least one of the rollers of the conveyor carrying the glass sheet.
  • the tangential speed of the magnets is therefore always equal to the conveying speed of the glass sheet, the identity of these two speeds guarantee a regular spacing of the patterns or images created.
  • the purpose of the present invention is to propose a method similar to that described in applications WO2014 / 009306 and WO2015 / 071 125, but which, thanks to a different arrangement of the magnet-carrying roller or rollers, allows decoupling of the speed of rotation from the magnetizing roller of the conveying speed of the glass sheet.
  • the method of the present invention thus operates with a magnetizer roll which rotates at a speed which is independent of that of the scroll speed of the glass sheet. This independence of the rotation and conveying speeds makes it possible to vary at will the distance of the patterns and their extent in the direction of travel of the glass sheet, as will be described in more detail below.
  • the present invention therefore relates to a lacquered glass manufacturing process comprising
  • the method being characterized in that the device for creating a magnetic field is a roller rotating about its axis, driven by a motor at a speed that can be adjusted independently of the transport speed of the glass sheet, said roller being fixed above the glass sheet so as to face the layer of liquid composition and having, on its surface, one or more magnetic elements.
  • the device for creating a magnetic field also hereinafter referred to as a magnetizing roller, is a roll of substantially cylindrical shape fixed above the conveyor, between the device for depositing a liquid composition, also a coating device, and the hardening device.
  • This magnetizer roller is therefore not part of the conveyor.
  • Its longitudinal axis is preferably substantially parallel to the plane of the glass sheet and perpendicular to the direction of transport of the glass sheet.
  • the axis of the magnetizing roller is not strictly parallel to the plane of the sheet: this would introduce a gradient of contrast or sharpness of the formed patterns, the patterns being all the more distinct and contrasted than the magnetizing roller is close to the layer of liquid composition formed on the surface of the glass sheet.
  • the dimensions of the magnetizing roller can be chosen freely according to the number and the size of the patterns and images that one wishes to create: the larger the size of the patterns or images, the greater the width and the diameter of the magnetizing roller must be large .
  • width of the sheet dimension of the edge of the sheet perpendicular to the scrolling direction.
  • the diameter of the magnetizing roller can be selected from wide limits. It is for example between 3 cm and 1 m, preferably between 5 cm and 60 cm, in particular between 7 cm and 30 cm.
  • the main advantage of a large diameter magnetizer roller lies in the ability to create large images, a first dimension of the image being limited by the circumference of the roll and a second dimension by the length of the roll.
  • the magnetic elements, or magnets are preferably permanent magnets, easier to implement than electromagnets.
  • the great flexibility of adjustment of the method of the invention makes it possible to achieve optical effects that would only allow electromagnets such as those described in WO201 5/071 125.
  • Examples that may be mentioned of magnetic materials that can be used are used for the process according to the invention steels, ferrites, alloys composed mainly of aluminum (Al), nickel (Ni) and cobalt (Co) (Alnico), alloys based on samarium and cobalt and alloys based on neodymium, iron and boron.
  • the magnetic members may protrude from the surface of the roll, they may be flush with the surface of the roll, or they may be slightly recessed from the surface of the roll. In all three cases, it may be interesting to cover the surface and the magnetic elements with a thin plastic film in order to protect them, to better hold them in place or to facilitate their cleaning.
  • An advantage of the process of the present invention over the prior art method lies in the ability to approach the magnets very close to the liquid composition layer containing the magnetizable particles.
  • the minimum distance between the magnets and the particles is fixed by the thickness of the glass sheet which can be several millimeters, or even of the order of a centimeter.
  • the proximity between the magnets and the magnetizable particles is not limited by the glass sheet and it is theoretically possible to approach the magnets less than 1 or 2 millimeters from the upper surface of the layer of liquid composition.
  • the position of the magnetizing roller is thus adjusted so that the smallest distance separating the magnetic element or elements, on the surface of the roller, from the surface of the layer of liquid composition is less than the thickness of the glass sheet, which is typically of the order of 4 - 6 mm, the term "the smallest distance” designating in this context the distance between the magnets and the layer when the magnets are the most close to the layer.
  • the smallest distance separating the magnetic element or elements, on the surface of the roll, from the surface of the layer of liquid composition is therefore between about 1 and 10 cm, preferably between 1.5 and 8 cm, in particular between 2 and 6 cm.
  • the distance between the surface of the roller - on which or in which are fixed the magnetic elements - and the surface of the layer of liquid composition may be advantageous to vary, over time, the distance between the surface of the roller - on which or in which are fixed the magnetic elements - and the surface of the layer of liquid composition. Such a variation would result in a change in the contrast and sharpness of the patterns formed in the liquid composition layer. It can be implemented randomly or periodically. In an advantageous embodiment of the invention the distance variation is carried out periodically.
  • the patterns / images shorten in the direction parallel to the direction of travel;
  • the method according to the invention can be operated by rotating the magnetizing roller at a constant speed with respect to the transport speed of the sheet, but different from it.
  • the method is operated so that the tangential velocity of a magnetic element on the surface of the roll is less than the transport speed of the glass sheet, or so that the tangential velocity of a magnetic element on the surface of the roll is greater than the transport speed of the glass sheet.
  • the speeds are preferably substantially constant.
  • the deposition of a layer of a liquid composition containing a curable organic binder and magnetizable particles on one side of the glass sheet can be done by known methods, for example by spraying, by roller application or by application to the curtain.
  • the liquid composition contains at least one organic binder, preferably a polymeric binder.
  • Curing is understood to mean any step which has the consequence of increasing the viscosity of the liquid composition to a level sufficient to freeze the magnetizable particles in their position and prevent any modification or disappearance of the pattern even when the initial magnetic field disappears or is replaced by a different magnetic field. Curing can be done by simple evaporation of a solvent, or by a polymerization reaction and / or crosslinking of the monomers, oligomers and / or polymers forming the organic binder, initiated by heating or irradiation of the liquid composition layer.
  • organic binder is not critical to the practice of the present invention and any film-forming base of paint, lacquer, ink or varnish can be used in principle.
  • Magnetizable particles are known as such. They may be ferromagnetic or paramagnetic particles. They preferably, but not necessarily, have an anisotropic form, particularly an elongated or flattened form. Such particles are described for example in the following applications and patents: US 3,676,273, US 4,838,648, WO 02/073250, EP 686,675 or WO 2007/131833.
  • the magnetizable particles preferably represent between 10 and 70% by weight of the liquid composition, in particular between 20 and 60% by weight of the liquid composition.
  • the liquid composition may further contain non-magnetizable pigments and other adjuvants conventionally used in paints, lacquers and varnishes.
  • the first layer of liquid composition contains, as single pigments, magnetizable particles. After curing, the layer then has a certain translucency and may advantageously be covered with a second pigmented layer, free of magnetizable particles.
  • the liquid composition layer containing the curable organic binder and the magnetizable particles is applied to the glass sheet preferably in an amount such that the surface weight of the dried and cured layer is between 30 g / m 2 and 250 g / m 2 .
  • the thickness of the dried and cured layer is advantageously between a few microns and several tens of microns, for example between 1 and 200 microns, preferably between 5 and 150 microns, in particular between 10 and 100 microns.
  • the curing device may for example be a chamber heated typically to a temperature between 50 and 200 ° C, or a radiation source emitting radiation absorbed by one or more components of the organic binder, for example by initiators or photoinitiators.
  • the radiation may be radiation in the visible, UV or infrared range, preferably near infrared.
  • FIG. 1 schematically represents the three essential steps of the method according to the invention, namely
  • the glass sheet transported by a conveyor, successively passing through three workstations respectively corresponding to these three process steps.
  • a glass sheet 1 is conveyed by a conveyor having a plurality of conveyor rollers 2 in the direction of the arrow, i.e. from left to right.
  • a liquid composition 3 containing magnetizable particles is deposited by means of a deposition device 4 in a continuous layer 5, not yet structured.
  • Downstream of the curtain coating device 4 is provided a device for creating a magnetic field 9.
  • This device for creating a magnetic field 9 is a roller 6 with a cylindrical body made of a non-magnetic material on the surface of which are integrated four magnetic elements 7, so that their surface is perfectly flush with the surface 8 of the roller 6.
  • the roller 6 is driven by a motor (not shown). Its distance from the continuous layer 5 is adjustable.
  • a curing device 1 1 emitting electromagnetic radiation is located downstream of the device for creating a magnetic field 9. The radiation is absorbed by a continuous layer and cures the layer 5 by crosslinking the organic binder present therein .

Abstract

The invention relates to a process for manufacturing lacquered glass comprising - depositing, on one face of a glass sheet (1), a layer (5) of a liquid composition (3) containing a curable organic binder and magnetizable particles dispersed in the organic binder, - creating a magnetic field in the immediate vicinity of the layer of liquid composition so as to orientate and/or displace the magnetizable particles and thus create a visible pattern, and - curing the organic binder, the three steps being carried out while the glass sheet is transported by means of a conveyor successively before a device for depositing a liquid composition (4), a device for creating a magnetic field (9), and a device for curing the organic binder (11), the process being characterized in that the device for creating a magnetic field (9) is a roller (6) rotating about its axis, driven by a motor at a speed that can be regulated independently of the transport speed of the glass sheet, said roller being fixed above the glass sheet (1) so as to face the layer (5) of liquid composition and comprising, at its surface, one or more magnetic elements (7).

Description

PROCEDE DE FABRICATION DE VERRE PEINT OU LAQUE  PROCESS FOR PRODUCING PAINTED GLASS OR LACQUER
La présente invention concerne un procédé de fabrication de verre peint ou laqué comprenant une étape de création de motifs visibles dans la couche de peinture ou de laque par orientation et/ou déplacement de particules magnétisables au moyen d'un champ magnétique. The present invention relates to a method for manufacturing painted or lacquered glass comprising a step of creating visible patterns in the paint or lacquer layer by orientation and / or displacement of magnetizable particles by means of a magnetic field.
On connaît des demandes internationales WO2014/009306 et WO2015/071 125 un procédé de fabrication de verres décoratifs laqués ou peints comprenant l'application, sur une feuille de verre, d'une composition liquide contenant des particules magnétisables, le convoyage de la feuille de verre enduite d'une couche de cette composition liquide au moyen d'un convoyeur horizontal à rouleaux, l'exposition de la couche de composition liquide à un champ magnétique créé par des éléments magnétiques intégrés dans la surface d'au moins un des rouleaux du convoyeur, puis le durcissement de la composition liquide.  International Applications WO2014 / 009306 and WO2015 / 071125 disclose a process for manufacturing lacquered or painted decorative glasses comprising the application, on a sheet of glass, of a liquid composition containing magnetizable particles, the conveying of the sheet of glass coated with a layer of this liquid composition by means of a horizontal roller conveyor, exposing the layer of liquid composition to a magnetic field created by magnetic elements integrated in the surface of at least one of the rolls of the conveyor, then curing the liquid composition.
L'exposition des particules magnétisables contenues dans la composition liquide aux lignes de champ magnétique entraîne un changement de l'organisation des particules et la création de motifs visibles par concentration ou orientation sélective des particules.  The exposure of the magnetizable particles contained in the liquid composition to the magnetic field lines causes a change in the organization of the particles and the creation of visible patterns by concentration or selective orientation of the particles.
Dans le procédé de l'état de la technique, les aimants permanents ou électroaimants sont intégrés dans la surface d'au moins un des rouleaux du convoyeur transportant la feuille de verre. La vitesse tangentielle des aimants est donc toujours égale à la vitesse de convoyage de la feuille de verre, l'identité de ces deux vitesses garantissant un espacement régulier des motifs ou images créés.  In the method of the state of the art, the permanent magnets or electromagnets are integrated in the surface of at least one of the rollers of the conveyor carrying the glass sheet. The tangential speed of the magnets is therefore always equal to the conveying speed of the glass sheet, the identity of these two speeds guarantee a regular spacing of the patterns or images created.
Le fait que la vitesse tangentielle des rouleaux du convoyeur - et des aimants fixés à leur surface - est identique à la vitesse de convoyage de la feuille de verre se traduit toutefois par une certaine rigidité du système. Il est impossible de faire varier l'espacement entre les motifs ou de modifier la taille des motifs créés. Faire tourner le convoyeur de l'état de la technique plus rapidement ou plus lentement a simplement pour résultat de raccourcir ou d'allonger le temps d'exposition de chaque point d'un motif au champ électrique. Cela a des répercussions sur le contraste des images crées, mais non pas sur la taille ou l'espacement des images ou motifs. The fact that the tangential speed of the conveyor rollers - and magnets attached to their surface - is identical to the conveying speed of the glass sheet, however, results in a certain rigidity of the system. You can not vary the spacing between patterns or change the size of the patterns you create. Turning the prior art conveyor faster or slower simply results in shortening or lengthening the exposure time of each point of a pattern in the field electric. This affects the contrast of the images created, but not the size or spacing of images or patterns.
La présente invention a pour but de proposer un procédé similaire à celui décrit dans les demandes WO2014/009306 et WO2015/071 125 mais qui permet, grâce à une disposition différente du ou des rouleaux porteurs d'aimants, de découpler la vitesse de rotation du rouleau magnétiseur de la vitesse de convoyage de la feuille de verre. Le procédé de la présente invention fonctionne donc avec un rouleau magnétiseur qui tourne à une vitesse qui est indépendante de celle de la vitesse de défilement de la feuille de verre. Cette indépendance des vitesses de rotation et de convoyage permet de faire varier à souhait la distance des motifs et leur étendu dans le sens de la direction de défilement de la feuille de verre, comme il sera décrit plus en détail ci-après.  The purpose of the present invention is to propose a method similar to that described in applications WO2014 / 009306 and WO2015 / 071 125, but which, thanks to a different arrangement of the magnet-carrying roller or rollers, allows decoupling of the speed of rotation from the magnetizing roller of the conveying speed of the glass sheet. The method of the present invention thus operates with a magnetizer roll which rotates at a speed which is independent of that of the scroll speed of the glass sheet. This independence of the rotation and conveying speeds makes it possible to vary at will the distance of the patterns and their extent in the direction of travel of the glass sheet, as will be described in more detail below.
La présente invention a par conséquent pour objet un procédé de fabrication de verre laqué comprenant  The present invention therefore relates to a lacquered glass manufacturing process comprising
- le dépôt, sur une face d'une feuille de verre, d'une couche d'une composition liquide contenant un liant organique durcissable et des particules magnétisables dispersées dans le liant organique,  depositing, on one side of a glass sheet, a layer of a liquid composition containing a curable organic binder and magnetizable particles dispersed in the organic binder,
- la création d'un champ magnétique à proximité immédiate de la couche de composition liquide de manière à orienter et/ou déplacer les particules magnétisables et créer ainsi un motif visible, et  the creation of a magnetic field in the immediate vicinity of the layer of liquid composition so as to orient and / or move the magnetizable particles and thus create a visible pattern, and
- le durcissement du liant organique,  the hardening of the organic binder,
les trois étapes étant mises en œuvre pendant que la feuille de verre est transportée au moyen d'un convoyeur successivement devant the three steps being implemented while the glass sheet is conveyed by means of a conveyor successively in front of
- un dispositif de dépôt d'une composition liquide,  a device for depositing a liquid composition,
- un dispositif de création d'un champ magnétique, et  a device for creating a magnetic field, and
- un dispositif de durcissement du liant organique,  a device for curing the organic binder,
le procédé étant caractérisé par le fait que le dispositif de création d'un champ magnétique est un rouleau en rotation autour de son axe, entraîné par un moteur à une vitesse pouvant être réglée indépendamment de la vitesse de transport de la feuille de verre, ledit rouleau étant fixé au-dessus de la feuille de verre de manière à faire face à la couche de composition liquide et comportant, à sa surface, un ou plusieurs éléments magnétiques. Le dispositif de création d'un champ magnétique, également appelé ci-après rouleau magnétiseur, est un rouleau de forme sensiblement cylindrique fixé au-dessus du convoyeur, entre le dispositif de dépôt d'une composition liquide, également dispositif d'enduction, et le dispositif de durcissement. the method being characterized in that the device for creating a magnetic field is a roller rotating about its axis, driven by a motor at a speed that can be adjusted independently of the transport speed of the glass sheet, said roller being fixed above the glass sheet so as to face the layer of liquid composition and having, on its surface, one or more magnetic elements. The device for creating a magnetic field, also hereinafter referred to as a magnetizing roller, is a roll of substantially cylindrical shape fixed above the conveyor, between the device for depositing a liquid composition, also a coating device, and the hardening device.
Ce rouleau magnétiseur ne fait donc pas partie du convoyeur.  This magnetizer roller is therefore not part of the conveyor.
Son axe longitudinal est de préférence sensiblement parallèle au plan de la feuille de verre et perpendiculaire à la direction de transport de la feuille de verre. On pourrait toutefois concevoir une installation dans laquelle l'axe du rouleau magnétiseur n'est pas strictement parallèle au plan de la feuille : cela introduirait un gradient de contraste ou de netteté des motifs formés, les motifs étant d'autant plus nets et contrastés que le rouleau magnétiseur est proche de la couche de composition liquide formée à la surface de la feuille de verre.  Its longitudinal axis is preferably substantially parallel to the plane of the glass sheet and perpendicular to the direction of transport of the glass sheet. One could however conceive an installation in which the axis of the magnetizing roller is not strictly parallel to the plane of the sheet: this would introduce a gradient of contrast or sharpness of the formed patterns, the patterns being all the more distinct and contrasted than the magnetizing roller is close to the layer of liquid composition formed on the surface of the glass sheet.
Les dimensions du rouleau magnétiseur peuvent être choisies librement en fonction du nombre et de la taille des motifs et images que l'on souhaite créer : plus la taille des motifs ou images est importante, plus la largeur et le diamètre du rouleau magnétiseur doivent être grands.  The dimensions of the magnetizing roller can be chosen freely according to the number and the size of the patterns and images that one wishes to create: the larger the size of the patterns or images, the greater the width and the diameter of the magnetizing roller must be large .
La longueur du rouleau magnétiseur peut être supérieure, inférieure ou égale à la largeur de la feuille de verre, elle est de préférence inférieure ou égale à la largeur de la feuille de verre (largeur de la feuille = dimension du bord de la feuille perpendiculaire à la direction de défilement). Plusieurs rouleaux magnétiseurs peuvent être alignés de manière à couvrir la largeur de la feuille de verre. Il est également envisageable de créer des motifs uniquement sur une partie de la surface de la feuille de verre et de choisir pour cela un rouleau unique avec une longueur très inférieure à la largeur de la feuille.  The length of the magnetizing roller may be greater than, less than or equal to the width of the glass sheet, it is preferably less than or equal to the width of the glass sheet (width of the sheet = dimension of the edge of the sheet perpendicular to the scrolling direction). Several magnetizing rollers may be aligned to cover the width of the glass sheet. It is also conceivable to create patterns only on a part of the surface of the glass sheet and to choose for this a single roll with a length much less than the width of the sheet.
Le diamètre du rouleau magnétiseur peut être choisi entre de larges limites. Il est par exemple compris entre 3 cm et 1 m, de préférence entre 5 cm et 60 cm, en particulier entre 7 cm et 30 cm. Le principal avantage d'un diamètre important de rouleau magnétiseur réside dans la possibilité de créer des images de grande taille, une première dimension de l'image étant limitée par la circonférence du rouleau et une deuxième dimension par la longueur du rouleau. The diameter of the magnetizing roller can be selected from wide limits. It is for example between 3 cm and 1 m, preferably between 5 cm and 60 cm, in particular between 7 cm and 30 cm. The main advantage of a large diameter magnetizer roller lies in the ability to create large images, a first dimension of the image being limited by the circumference of the roll and a second dimension by the length of the roll.
Les éléments magnétiques, ou aimants, sont de préférence des aimants permanents, plus simples à mettre en œuvre que des électroaimants. La grande souplesse de réglage du procédé de l'invention permet en effet de réaliser des effets optiques que permettraient seulement des électroaimants tels que ceux décrits dans WO201 5/071 125. On peut citer à titre d'exemples de matériaux magnétiques susceptibles d'être utilisés pour le procédé selon l'invention les aciers, les ferrites, les alliages composés principalement d'aluminium (Al), de nickel (Ni) et de cobalt (Co) (Alnico), les alliages à base de samarium et de cobalt et les alliages à base de néodyme, de fer et de bore.  The magnetic elements, or magnets, are preferably permanent magnets, easier to implement than electromagnets. The great flexibility of adjustment of the method of the invention makes it possible to achieve optical effects that would only allow electromagnets such as those described in WO201 5/071 125. Examples that may be mentioned of magnetic materials that can be used are used for the process according to the invention steels, ferrites, alloys composed mainly of aluminum (Al), nickel (Ni) and cobalt (Co) (Alnico), alloys based on samarium and cobalt and alloys based on neodymium, iron and boron.
Les éléments magnétiques peuvent faire saillie par rapport à la surface du rouleau, ils peuvent être au ras de la surface du rouleau, ou bien ils peuvent être légèrement en retrait de la surface du rouleau. Dans les trois cas, il peut être intéressant de couvrir la surface et les éléments magnétiques avec un mince film en matière plastique afin de les protéger, de mieux les maintenir en place ou de faciliter leur nettoyage.  The magnetic members may protrude from the surface of the roll, they may be flush with the surface of the roll, or they may be slightly recessed from the surface of the roll. In all three cases, it may be interesting to cover the surface and the magnetic elements with a thin plastic film in order to protect them, to better hold them in place or to facilitate their cleaning.
Un avantage du procédé de la présente invention par rapport au procédé de l'art antérieur réside dans la possibilité d'approcher les aimants très près de la couche de composition liquide contenant les particules magnétisables. Dans l'état de la technique, comme les aimants sont situés sur un rouleau du convoyeur, c'est-à-dire en dessous de la feuille de verre, du côté opposé à celui qui porte la couche de composition liquide, la distance minimale entre les aimants et les particules est fixée par l'épaisseur de la feuille de verre qui peut être de plusieurs millimètres, voire de l'ordre du centimètre. Dans la présente invention, comme le rouleau magnétiseur et la couche de composition liquide se trouvent du même côté de la feuille de verre, la proximité entre les aimants et les particules magnétisables n'est pas limitée par la feuille de verre et il est théoriquement possible d'approcher les aimants de moins de 1 ou 2 millimètres de la surface supérieure de la couche de composition liquide. Dans un mode de réalisation avantageux de la présente invention on règle donc la position du rouleau magnétiseur de manière à ce que la plus petite distance séparant le ou les éléments magnétiques, à la surface du rouleau, de la surface de la couche de composition liquide soit inférieure à l'épaisseur de la feuille de verre, qui est typiquement de l'ordre de 4 - 6 mm, le terme « la plus petite distance » désignant dans ce contexte la distance entre les aimants et la couche lorsque les aimants sont le plus proche possible de la couche. An advantage of the process of the present invention over the prior art method lies in the ability to approach the magnets very close to the liquid composition layer containing the magnetizable particles. In the state of the art, as the magnets are located on a conveyor roll, that is to say below the glass sheet, on the opposite side to the one carrying the layer of liquid composition, the minimum distance between the magnets and the particles is fixed by the thickness of the glass sheet which can be several millimeters, or even of the order of a centimeter. In the present invention, since the magnetizer roller and the liquid composition layer are on the same side of the glass sheet, the proximity between the magnets and the magnetizable particles is not limited by the glass sheet and it is theoretically possible to approach the magnets less than 1 or 2 millimeters from the upper surface of the layer of liquid composition. In an advantageous embodiment of the present invention, the position of the magnetizing roller is thus adjusted so that the smallest distance separating the magnetic element or elements, on the surface of the roller, from the surface of the layer of liquid composition is less than the thickness of the glass sheet, which is typically of the order of 4 - 6 mm, the term "the smallest distance" designating in this context the distance between the magnets and the layer when the magnets are the most close to the layer.
L'intérêt de cette faible distance (c'est-à-dire de cette grande proximité entre aimants et particules magnétisables) réside dans le contraste important et la grande netteté des motifs que l'on peut obtenir sans réduire la vitesse de défilement de la feuille de verre. Dans l'état de technique WO2014/009306, pour obtenir avec des aimants permanents des motifs plus nets ou plus contrastés, le seul moyen consiste à augmenter le temps d'exposition des particules au champ magnétique, donc à ralentir la vitesse du convoyeur.  The interest of this small distance (that is to say of this great proximity between magnets and magnetizable particles) lies in the important contrast and sharpness of the patterns that can be obtained without reducing the speed of movement of the glass sheet. In the state of the art WO2014 / 009306, to obtain permanent patterns with sharper or more contrasting patterns, the only way is to increase the time of exposure of the particles to the magnetic field, so to slow the speed of the conveyor.
Il peut toutefois également être intéressant d'éloigner au contraire les aimants de la couche de composition liquide afin d'adoucir le contraste ou de rendre les motifs plus flous. Dans un autre mode de réalisation du procédé selon l'invention, la plus petite distance séparant le ou les éléments magnétiques, à la surface du rouleau, de la surface de la couche de composition liquide est par conséquent comprise entre environ 1 et 10 cm, de préférence entre 1 ,5 et 8 cm, en particulier entre 2 et 6 cm.  It may also be interesting, however, to move the magnets away from the layer of liquid composition to soften the contrast or to make the patterns more fuzzy. In another embodiment of the method according to the invention, the smallest distance separating the magnetic element or elements, on the surface of the roll, from the surface of the layer of liquid composition is therefore between about 1 and 10 cm, preferably between 1.5 and 8 cm, in particular between 2 and 6 cm.
Enfin, il peut être intéressant de faire varier, dans le temps, la distance entre la surface du rouleau - sur laquelle ou dans laquelle sont fixés les éléments magnétiques - et la surface de la couche de composition liquide. Une telle variation se traduirait par une variation du contraste et de la netteté des motifs formés dans la couche de composition liquide. Elle peut être mise en œuvre de manière aléatoire ou de manière périodique. Dans un mode de réalisation avantageux de l'invention la variation de distance est réalisée de manière périodique.  Finally, it may be advantageous to vary, over time, the distance between the surface of the roller - on which or in which are fixed the magnetic elements - and the surface of the layer of liquid composition. Such a variation would result in a change in the contrast and sharpness of the patterns formed in the liquid composition layer. It can be implemented randomly or periodically. In an advantageous embodiment of the invention the distance variation is carried out periodically.
Da manière analogue, on pourrait faire varier, de préférence de manière périodique, la vitesse de rotation du rouleau par rapport à la vitesse de transport de la feuille de verre. Une telle variation de la vitesse de de rotation du rouleau magnétiseur se traduit par une variation de la taille des motifs/images : In a similar manner, it would be possible to vary, preferably periodically, the speed of rotation of the roll with respect to the speed of transport of the glass sheet. Such a variation in the speed of rotation of the magnetizing roller results in a variation of the size of the patterns / images:
- lorsqu'on augmente la vitesse de rotation du rouleau magnétiseur par rapport à la vitesse de défilement de la feuille de verre les motifs/images raccourcissent dans le sens parallèle à la direction de défilement ;  when increasing the speed of rotation of the magnetizing roller with respect to the speed of travel of the glass sheet, the patterns / images shorten in the direction parallel to the direction of travel;
- à l'inverse, lorsqu'on diminue la vitesse de rotation du rouleau magnétiseur par rapport à la vitesse de défilement de la feuille de verre les motifs/images s'allongent dans le sens parallèle à la direction de défilement.  - Conversely, when decreasing the speed of rotation of the magnetizer roller relative to the speed of travel of the glass sheet patterns / images elongate in the direction parallel to the direction of travel.
Enfin, on peut faire fonctionner le procédé selon l'invention en faisant tourner le rouleau magnétiseur à une vitesse constante par rapport à la vitesse de transport de la feuille, mais différente de celle-ci.  Finally, the method according to the invention can be operated by rotating the magnetizing roller at a constant speed with respect to the transport speed of the sheet, but different from it.
Ainsi, dans un mode de réalisation du procédé de l'invention, on fait fonctionner le procédé de manière à ce que la vitesse tangentielle d'un élément magnétique à la surface du rouleau soit inférieure à la vitesse de transport de la feuille de verre, ou de manière à ce que la vitesse tangentielle d'un élément magnétique à la surface du rouleau soit supérieure à la vitesse de transport de la feuille de verre. Dans ces deux cas, les vitesses sont de préférence sensiblement constantes.  Thus, in one embodiment of the method of the invention, the method is operated so that the tangential velocity of a magnetic element on the surface of the roll is less than the transport speed of the glass sheet, or so that the tangential velocity of a magnetic element on the surface of the roll is greater than the transport speed of the glass sheet. In both cases, the speeds are preferably substantially constant.
Le dépôt d'une couche d'une composition liquide contenant un liant organique durcissable et des particules magnétisables sur une face de la feuille de verre peut se faire selon des méthodes connues, par exemple par pulvérisation, par application au rouleau ou encore par application au rideau.  The deposition of a layer of a liquid composition containing a curable organic binder and magnetizable particles on one side of the glass sheet can be done by known methods, for example by spraying, by roller application or by application to the curtain.
La composition liquide contient au moins un liant organique, de préférence un liant polymérique. On entend par durcissement toute étape qui a pour conséquent d'augmenter la viscosité de la composition liquide jusqu'à un niveau suffisant pour figer les particules magnétisables dans leur position et empêcher toute modification ou disparition du motif même lorsque le champ magnétique initial disparaît ou est remplacé par un champ magnétique différent. Le durcissement peut se faire par simple évaporation d'un solvant, ou bien par une réaction de polymérisation et/ou de réticulation des monomères, oligomères et/ou polymères formant le liant organique, amorcée par chauffage ou irradiation de la couche de composition liquide. The liquid composition contains at least one organic binder, preferably a polymeric binder. Curing is understood to mean any step which has the consequence of increasing the viscosity of the liquid composition to a level sufficient to freeze the magnetizable particles in their position and prevent any modification or disappearance of the pattern even when the initial magnetic field disappears or is replaced by a different magnetic field. Curing can be done by simple evaporation of a solvent, or by a polymerization reaction and / or crosslinking of the monomers, oligomers and / or polymers forming the organic binder, initiated by heating or irradiation of the liquid composition layer.
La nature chimique du liant organique n'est pas déterminante pour la mise en œuvre de la présente invention et on peut utiliser en principe n'importe quelle base filmogène de peinture, laque, encre ou vernis.  The chemical nature of the organic binder is not critical to the practice of the present invention and any film-forming base of paint, lacquer, ink or varnish can be used in principle.
Les particules magnétisables sont connues en tant que telles. Il peut s'agir de particules ferromagnétiques ou paramagnétiques. Elles ont de préférence, mais pas nécessairement, une forme anisotrope, en particulier une forme allongée ou aplatie. De telles particules sont décrites par exemple dans les demandes et brevets suivants : US 3 676 273, US 4 838 648, WO 02/073250, EP 686 675 ou WO 2007/131833. Les particules magnétisables représentent de préférence entre 10 et 70 % en poids de la composition liquide, en particulier entre 20 et 60 % en poids de la composition liquide.  Magnetizable particles are known as such. They may be ferromagnetic or paramagnetic particles. They preferably, but not necessarily, have an anisotropic form, particularly an elongated or flattened form. Such particles are described for example in the following applications and patents: US 3,676,273, US 4,838,648, WO 02/073250, EP 686,675 or WO 2007/131833. The magnetizable particles preferably represent between 10 and 70% by weight of the liquid composition, in particular between 20 and 60% by weight of the liquid composition.
La composition liquide peut contenir en outre des pigments non magnétisables et d'autres adjuvants utilisés classiquement dans les peintures, laques et vernis.  The liquid composition may further contain non-magnetizable pigments and other adjuvants conventionally used in paints, lacquers and varnishes.
Dans un mode de réalisation particulier, la première couche de composition liquide contient, comme seuls pigments, des particules magnétisables. Après durcissement, la couche présente alors une certaine translucidité et peut avantageusement être couverte d'une deuxième couche pigmentée, exempte de particules magnétisables.  In a particular embodiment, the first layer of liquid composition contains, as single pigments, magnetizable particles. After curing, the layer then has a certain translucency and may advantageously be covered with a second pigmented layer, free of magnetizable particles.
La couche de composition liquide contenant le liant organique durcissable et les particules magnétisables est appliquée sur la feuille de verre de préférence en une quantité telle que le poids surfacique de la couche séchée et durcie est compris entre 30 g/m2 et 250 g/m2. The liquid composition layer containing the curable organic binder and the magnetizable particles is applied to the glass sheet preferably in an amount such that the surface weight of the dried and cured layer is between 30 g / m 2 and 250 g / m 2 .
L'épaisseur de la couche séchée et durcie est avantageusement comprise entre quelques microns et plusieurs dizaines de microns, par exemple entre 1 et 200 microns, de préférence entre 5 et 150 microns, en particulier entre 10 et 100 microns.  The thickness of the dried and cured layer is advantageously between a few microns and several tens of microns, for example between 1 and 200 microns, preferably between 5 and 150 microns, in particular between 10 and 100 microns.
Le dispositif de durcissement peut-être par exemple une enceinte chauffée typiquement à une température comprise entre 50 et 200 °C, ou une source de rayonnement émettant un rayonnement absorbé par un ou plusieurs composants du liant organique, par exemple par des amorceurs ou photoamorceurs. Le rayonnement peut être un rayonnement dans le domaine du visible, de l'UV ou de l'infrarouge, de préférence le proche infrarouge. The curing device may for example be a chamber heated typically to a temperature between 50 and 200 ° C, or a radiation source emitting radiation absorbed by one or more components of the organic binder, for example by initiators or photoinitiators. The radiation may be radiation in the visible, UV or infrared range, preferably near infrared.
Le procédé de la présente invention est à présent expliqué plus en détail à l'aide d'un exemple et en référence à la figure 1 qui représente de manière schématique les trois étapes essentielles du procédé selon l'invention, à savoir  The method of the present invention is now explained in more detail with the aid of an example and with reference to FIG. 1 which schematically represents the three essential steps of the method according to the invention, namely
- l'étape de dépôt de la composition liquide sur une feuille de verre, the step of depositing the liquid composition on a glass sheet,
l'étape d'orientation des particules magnétisables au moyen d'un rouleau magnétiseur placé au-dessus de la feuille de verre, et  the step of orienting the magnetizable particles by means of a magnetizing roller placed above the glass sheet, and
l'étape de durcissement de la couche contenant des motifs formés de particules magnétisables,  the step of hardening the layer containing patterns formed of magnetizable particles,
la feuille de verre, transportée par un convoyeur, passant successivement par trois postes de travail correspondant respectivement à ces trois étapes de procédé. the glass sheet transported by a conveyor, successively passing through three workstations respectively corresponding to these three process steps.
Sur la figure 1 une feuille de verre 1 est transportée par un convoyeur comportant une pluralité de rouleaux transporteurs 2 dans la direction de la flèche, c'est-à-dire de la gauche vers la droite. Une composition liquide 3 contenant des particules magnétisables est déposée au moyen d'un dispositif de dépôt 4 en une couche continue 5, non encore structurée. En aval du dispositif d'enduction au rideau 4 est prévu un dispositif de création d'un champ magnétique 9. Ce dispositif de création d'un champ magnétique 9 est un rouleau 6 avec un corps cylindrique en un matériau non-magnétique à la surface duquel sont intégrés quatre éléments magnétiques 7, de manière à ce que leur surface soit parfaitement au ras de la surface 8 du rouleau 6. Le rouleau 6 est entraîné par un moteur (non représenté). Sa distance par rapport à la couche continue 5 est réglable. Son axe de rotation est parallèle à la surface de la feuille de verre 1 et perpendiculaire à la direction de transport de la feuille de verre 1 . Lorsque la couche continue 5 passe sous le dispositif de création d'un champ magnétique 9 les particules métalliques qu'elle contient sont déplacées et orientées sous l'influence du champ magnétique à proximité de l'élément magnétique 7 le plus proche de la couche continue 5, créant ainsi des motifs 10 visibles qui persistent dans la couche lorsque celle-ci n'est plus sous l'influence du champ magnétique des éléments magnétiques 7. Un dispositif de durcissement 1 1 émettant un rayonnement électromagnétique est situé en aval du dispositif de création d'un champ magnétique 9. Le rayonnement est absorbé par couche continue et effectue le durcissement de la couche 5 par réticulation du liant organique présent dans celle-ci. In Fig. 1 a glass sheet 1 is conveyed by a conveyor having a plurality of conveyor rollers 2 in the direction of the arrow, i.e. from left to right. A liquid composition 3 containing magnetizable particles is deposited by means of a deposition device 4 in a continuous layer 5, not yet structured. Downstream of the curtain coating device 4 is provided a device for creating a magnetic field 9. This device for creating a magnetic field 9 is a roller 6 with a cylindrical body made of a non-magnetic material on the surface of which are integrated four magnetic elements 7, so that their surface is perfectly flush with the surface 8 of the roller 6. The roller 6 is driven by a motor (not shown). Its distance from the continuous layer 5 is adjustable. Its axis of rotation is parallel to the surface of the glass sheet 1 and perpendicular to the direction of transport of the glass sheet 1. When the continuous layer 5 passes under the device for creating a magnetic field 9, the metal particles that it contains are displaced and oriented under the influence of the magnetic field near the magnetic element 7 closest to the continuous layer 5, thus creating visible patterns that persist in the layer when it is no longer under the influence of the magnetic field of the magnetic elements 7. A curing device 1 1 emitting electromagnetic radiation is located downstream of the device for creating a magnetic field 9. The radiation is absorbed by a continuous layer and cures the layer 5 by crosslinking the organic binder present therein .

Claims

REVENDICATIONS
1 . Procédé de fabrication de verre laqué comprenant 1. Method of manufacturing lacquered glass comprising
- le dépôt, sur une face d'une feuille de verre, d'une couche d'une composition liquide contenant un liant organique durcissable et des particules magnétisables dispersées dans le liant organique,  depositing, on one side of a glass sheet, a layer of a liquid composition containing a curable organic binder and magnetizable particles dispersed in the organic binder,
- la création d'un champ magnétique à proximité immédiate de la couche de composition liquide de manière à orienter et/ou déplacer les particules magnétisables et créer ainsi un motif visible, et  the creation of a magnetic field in the immediate vicinity of the layer of liquid composition so as to orient and / or move the magnetizable particles and thus create a visible pattern, and
- le durcissement du liant organique,  the hardening of the organic binder,
les trois étapes étant mises en œuvre pendant que la feuille de verre est transportée au moyen d'un convoyeur successivement devant the three steps being implemented while the glass sheet is conveyed by means of a conveyor successively in front of
- un dispositif de dépôt d'une composition liquide,  a device for depositing a liquid composition,
- un dispositif de création d'un champ magnétique, et  a device for creating a magnetic field, and
- un dispositif de durcissement du liant organique,  a device for curing the organic binder,
le procédé étant caractérisé par le fait que le dispositif de création d'un champ magnétique est un rouleau en rotation autour de son axe, entraîné par un moteur à une vitesse pouvant être réglée indépendamment de la vitesse de transport de la feuille de verre, ledit rouleau étant fixé au-dessus de la feuille de verre de manière à faire face à la couche de composition liquide et comportant, à sa surface, un ou plusieurs éléments magnétiques. the method being characterized in that the device for creating a magnetic field is a roller rotating about its axis, driven by a motor at a speed that can be adjusted independently of the transport speed of the glass sheet, said roller being fixed above the glass sheet so as to face the layer of liquid composition and having, on its surface, one or more magnetic elements.
2. Procédé selon la revendication 1 , caractérisé par le fait que l'axe du rouleau est sensiblement parallèle au plan de la feuille de verre et perpendiculaire à la direction de transport de la feuille de verre.  2. Method according to claim 1, characterized in that the axis of the roller is substantially parallel to the plane of the glass sheet and perpendicular to the direction of transport of the glass sheet.
3. Procédé selon la revendication 1 ou 2, caractérisé par le fait que l'on fait varier, de préférence de manière périodique, la vitesse de rotation du rouleau par rapport à la vitesse de transport de la feuille de verre.  3. Method according to claim 1 or 2, characterized in that the speed of rotation of the roll is varied, preferably periodically, with respect to the speed of transport of the glass sheet.
4. Procédé selon la revendication 1 ou 2, caractérisé par le fait que l'on fait varier dans le temps, de préférence de manière périodique, la distance entre la surface du rouleau et la surface de la couche de composition liquide. 4. Method according to claim 1 or 2, characterized in that the distance between the surface of the roll and the surface of the layer of liquid composition is varied over time, preferably periodically.
5. Procédé selon la revendication 1 ou 2, caractérisé par le fait que la plus petite distance séparant le ou les éléments magnétiques à la surface du rouleau de la surface de la couche de composition liquide est inférieure à l'épaisseur de la feuille de verre. 5. Method according to claim 1 or 2, characterized in that the smallest distance separating the magnetic element (s) at the surface of the roll from the surface of the layer of liquid composition is less than the thickness of the glass sheet. .
6. Procédé selon la revendication 1 ou 2, caractérisé par le fait que la vitesse tangentielle d'un élément magnétique à la surface du rouleau est inférieure à la vitesse de transport de la feuille de verre.  6. Method according to claim 1 or 2, characterized in that the tangential speed of a magnetic element on the surface of the roll is less than the speed of transport of the glass sheet.
7. Procédé selon la revendication 1 ou 2, caractérisé par le fait que la vitesse tangentielle d'un élément magnétique à la surface du rouleau est supérieure à la vitesse de transport de la feuille de verre.  7. Method according to claim 1 or 2, characterized in that the tangential speed of a magnetic element on the surface of the roll is greater than the speed of transport of the glass sheet.
PCT/FR2017/050571 2016-03-24 2017-03-14 Process for manufacturing painted or lacquered glass WO2017162954A1 (en)

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KR1020187027143A KR20180122639A (en) 2016-03-24 2017-03-14 Method for making painted or lacquered glass
EP17714857.4A EP3433214A1 (en) 2016-03-24 2017-03-14 Process for manufacturing painted or lacquered glass

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BR112018067728A2 (en) 2019-01-08
FR3049200B1 (en) 2018-04-13
KR20180122639A (en) 2018-11-13
EP3433214A1 (en) 2019-01-30
MX2018011520A (en) 2019-02-20

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