Classifications

• • C—CHEMISTRY; METALLURGY
  • C03—GLASS; MINERAL OR SLAG WOOL
  • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
  • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
  • C03C17/006—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
  • 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
• • 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 .

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• Chemical & Material Sciences (AREA)
• General Chemical & Material Sciences (AREA)
• Composite Materials (AREA)
• Life Sciences & Earth Sciences (AREA)
• Engineering & Computer Science (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Geochemistry & Mineralogy (AREA)
• Materials Engineering (AREA)
• Organic Chemistry (AREA)
• Dispersion Chemistry (AREA)
• Inorganic Chemistry (AREA)
• Application Of Or Painting With Fluid Materials (AREA)
• Surface Treatment Of Glass (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=55808763

Family Applications (1)

Country Status (6)

Family Cites Families (8)

• 2016
  • 2016-03-24 FR FR1652534A patent/FR3049200B1/fr not_active Expired - Fee Related
• 2017
  • 2017-03-14 BR BR112018067728A patent/BR112018067728A2/pt not_active Application Discontinuation
  • 2017-03-14 MX MX2018011520A patent/MX2018011520A/es unknown
  • 2017-03-14 WO PCT/FR2017/050571 patent/WO2017162954A1/fr active Application Filing
  • 2017-03-14 EP EP17714857.4A patent/EP3433214A1/fr not_active Withdrawn
  • 2017-03-14 KR KR1020187027143A patent/KR20180122639A/ko not_active Application Discontinuation

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