Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
  • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
  • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
  • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
  • B32B17/10807—Making laminated safety glass or glazing; Apparatus therefor
  • B32B17/10899—Making laminated safety glass or glazing; Apparatus therefor by introducing interlayers of synthetic resin
  • B32B17/10935—Making laminated safety glass or glazing; Apparatus therefor by introducing interlayers of synthetic resin as a preformed layer, e.g. formed by extrusion
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B38/00—Ancillary operations in connection with laminating processes
  • B32B38/14—Printing or colouring
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
  • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
  • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
  • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
  • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
  • B32B17/10009—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets
  • B32B17/10036—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising two outer glass sheets
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
  • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
  • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
  • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
  • B32B17/10165—Functional features of the laminated safety glass or glazing
  • B32B17/10247—Laminated safety glass or glazing containing decorations or patterns for aesthetic reasons
  • B32B17/10256—Laminated safety glass or glazing containing decorations or patterns for aesthetic reasons created by printing techniques
  • B32B17/10275—Laminated safety glass or glazing containing decorations or patterns for aesthetic reasons created by printing techniques on interlayer
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
  • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
  • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
  • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
  • B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
  • B32B17/10761—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer containing vinyl acetal
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
  • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
  • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
  • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
  • B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
  • B32B17/1077—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer containing polyurethane
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
  • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
  • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
  • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
  • B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
  • B32B17/10788—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer containing ethylene vinylacetate
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
  • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
  • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
  • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
  • B32B17/10807—Making laminated safety glass or glazing; Apparatus therefor
  • B32B17/10981—Pre-treatment of the layers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B38/00—Ancillary operations in connection with laminating processes
  • B32B38/14—Printing or colouring
  • B32B38/145—Printing
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
  • B41M1/00—Inking and printing with a printer's forme
  • B41M1/26—Printing on other surfaces than ordinary paper
  • B41M1/34—Printing on other surfaces than ordinary paper on glass or ceramic surfaces
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
  • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
  • B32B37/1207—Heat-activated adhesive
  • B32B2037/1215—Hot-melt adhesive
  • B32B2037/1223—Hot-melt adhesive film-shaped
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2250/00—Layers arrangement
  • B32B2250/02—2 layers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2307/00—Properties of the layers or laminate
  • B32B2307/40—Properties of the layers or laminate having particular optical properties
  • B32B2307/412—Transparent
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2307/00—Properties of the layers or laminate
  • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
  • B32B2307/538—Roughness
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2419/00—Buildings or parts thereof
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2457/00—Electrical equipment
  • B32B2457/12—Photovoltaic modules
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2605/00—Vehicles
  • B32B2605/006—Transparent parts other than made from inorganic glass, e.g. polycarbonate glazings

Definitions

• the invention relates to the field of laminated glazing, comprising
• At least one sheet of mineral glass such as soda-lime, aluminosilicate, borosilicate, where appropriate thermally toughened or chemically reinforced, or of transparent polymer material such as polycarbonate (PC), poly (methyl methacrylate) (PMMA), and
• PVB polyvinyl butyral
• TPU thermoplastic polyurethane
• EVA ethylene-vinyl acetate copolymer
• PVB polyvinyl butyral
• TPU thermoplastic polyurethane
• EVA ethylene-vinyl acetate copolymer
• PVB polyvinyl butyral
• TPU thermoplastic polyurethane
• EVA ethylene-vinyl acetate copolymer
• Such glazing is for example used as a windshield of a motor vehicle, or equivalent, which can include numerous functions: layer reflecting solar radiation, making it possible to lower the temperature of the instrument panel and the ambient temperature in the passenger compartment, support interior rear-view mirror, electric current supply bus-bars in particular for a layer of indium oxide doped with tin (in English "Indium Tin Oxide” -ITO-) or a network of heating wires, upper filter band solar radiation, with possibly degraded coloring, rain detector ...
• Laminated glazing is thus printed for various purposes: edge of the glazing opacified on its entire periphery to protect the underlying glue from UV radiation and hide bodywork elements or seals seen by an observer outside the vehicle, manufacturer's markings, various standards, opacified surface to hide the base of the interior mirror from the view of an observer outside the vehicle.
• Laminated glazing is frequently curved, but it is usual to make the prints mentioned above on flat glass sheets, that is to say before bending operations, because the difficulty of printing on curved surfaces is superior.
• Enamel or ink prints must meet the required optical qualities: good coverage, opacity and resolution.
• optical density of the black enamel after firing is of the order of 3.
• optical densities slightly greater than this value may be required, which can only be obtained by increasing the thickness of. enamel filed.
• the glass cullet enamel While unglazed glass cullet can thus be reintroduced into a glass furnace by float, at rates generally of the order of 20-30% by weight of the furnace charge, the glass cullet enamel, on the other hand, usually results in the appearance of unwanted residual colorings or unmelted residual islands in the formed glass sheets.
• the rate of enamelled glass cullet that can be reintroduced into these ovens therefore does not exceed, in the most favorable cases, 2 to 3% by weight of the load in the ovens (the enamel generally constituting 0, 1 to 0.5% by weight of this glass cullet).
• the inventors have sought a means of producing an impression on curved laminated glazing capable of guaranteeing the required specifications of the final product: compliance with customer standards and specifications, not only from a mechanical strength and aging point of view, but also from an aesthetic point of view. It is worth mentioning in particular:
• the inventors also aimed at the possibility of implementing numerous printing processes such as screen printing, inkjet, offset, flexography, pad printing, digital printing, as well as many types of ink compositions, to print in any color: black, gray, white, blue, green, red, yellow ...
• a printed laminated glazing comprising at least one transparent sheet glued to an intermediate adhesive layer, characterized in that the intermediate adhesive layer is obtained from at least a first and a second partial interlayer adhesive layer, in that one of the two main faces of the first or the second partial interlayer adhesive layer is printed with ink, in that the transparent sheet, the first and the second partial interlayer adhesive layers are assembled so that the printed main face of the first or the second partial interlayer adhesive layer is in direct contact with the second or the first partial interlayer adhesive layer, followed by laminating.
• the invention makes it possible to replace the enamels of sheets of mineral glass mentioned above, and therefore to eliminate the operation of precooking the enamel, by solving the problems inherent in the latter, such as the optical defects of the enameling by face 4, and those related to the different thermal conductivity of enamel and glass. It should however be emphasized that such enamelling, particularly on the face 2, 4 and / or 3 in the case of a laminate with two sheets of glass, does not systematically exclude the glazing from the scope of the invention.
• the cumulative thickness of the two partial adhesive layers may be equal to the usual thickness of an adhesive layer, leaving the basis weight of the laminated glazing unchanged.
• the ink is protected within the adhesive interlayer.
• the adhesion between the transparent sheet of glass or the like and the intermediate adhesive layer is thereby increased compared to a laminate having the ink printing at the interface thereof; in a laminate with two sheets of glass, the adhesion between them is therefore increased.
• the acid resistance of printed laminated glazing is improved.
• the invention allows the storage of the assemblies of two partial intermediate adhesive sheets, one of which is printed, one on top of the other, thus saving space.
• the invention makes it possible to use only transparent sheets without printing, to be associated with assemblies of partial adhesive layers where appropriate variously printed, facilitating the storage and supply of transparent sheets in the production.
• the components of the printed laminated glazing are thus easily available for manufacture at any time.
• the invention makes it possible to print at the edge of the laminated glazing. (On the contrary, the deposition of an enamel on the surface of the glass requires an unglazed area of at least 2 mm around the perimeter of the glass, to guarantee good degassing during the assembly step and to avoid delamination, avoid the problem of breakage in the oven linked to the presence of enamel on the shaping joint, and also because the printing technology does not allow glass edge printing.)
• the printed laminated glazing obtained by the process of the invention may consist only of a transparent sheet and an intermediate adhesive layer, or else of two transparent sheets bonded by means of an adhesive layer, or else even by at least three transparent sheets glued two by two by an adhesive interlayer (i.e. n transparent sheets and (n-1) adhesive interlayer layers).
• these interlayer adhesive layers may each consist of two partial interlayer adhesive layers bearing an ink imprint on an inner main face of one of the two, in accordance with, and without departing from the scope of the invention.
• Such an impression according to the invention in two different planes of the laminated structure can produce a visual effect of relief.
• a first and a second transparent sheet are adhered through the adhesive interlayer.
• the transparent sheet (s) are, each independently of one another, in mineral glass of the soda-lime, aluminosilicate, borosilicate or equivalent type, optionally thermally toughened or chemically reinforced, or in a polymer material such as polycarbonate (PC). , poly (methyl methacrylate) (PMMA), polyurethane (PU) or equivalent.
• PC polycarbonate
• PMMA poly (methyl methacrylate)
• PU polyurethane
• the first and second partial intermediate adhesive layers, as well as any other intermediate adhesive layer possibly forming part of the printed laminated glazing are, each independently of one another, of polyvinyl butyral (PVB), ethylene-vinyl acetate. (EVA), thermoplastic polyurethane (TPU) or equivalent.
• PVB polyvinyl butyral
• EVA ethylene-vinyl acetate.
• TPU thermoplastic polyurethane
• At least the two main faces of the first and a second partial interlayer adhesive layers in direct contact with each other have a roughness between 2.80 and 4.20 ⁇ m.
• the ink does not completely fill the valleys formed by this roughness of the substrate on which it is deposited.
• the two major faces of each of the first and second partial interlayer adhesive layers, as well as any other interlayer adhesive layers that may occur appropriate in the manufacture of laminated glazing may, moreover, have a roughness of between 2.80 and 4.20 ⁇ m, this arrangement being favorable to good degassing during the assembly step.
• one of the two main faces of the first or the second partial interlayer adhesive layer is subjected to oxidation by plasma flame, corona discharge or the like, before being printed.
• the interlayer adhesive surface thus treated is activated so as to be compatible with printing by all types of inks.
• one of the two main faces of the first or the second partial interlayer adhesive layer is printed by screen printing, inkjet, offset, flexography, pad printing, digital printing or the like.
• one of the two main faces of the first or the second printed partial interlayer adhesive layer is dried before assembling the first and second partial interlayer adhesive layers with the transparent sheet and in direct contact with each other.
• At least one of the two main faces of at least one transparent sheet, the main face internal to the structure of the printed laminated glazing, that is to say not exposed to the outside (external atmosphere, passenger compartment of a motor vehicle, for example) is printed by screen printing, inkjet, offset, flexography, pad printing, digital printing or the like, with the same ink as one of the two main faces of the first or the second partial interlayer adhesive layer.
• a laminated glazing with two sheets of glass these are faces 2 and / or 3.
• a subject of the invention is also the application of a printed laminated glazing obtained by the method described above, as automotive glazing such as a windshield, glazing for buildings, solar or industry.
• the invention is illustrated by the following example.
• Two partial adhesive layers of 0.38 mm thick PVB are used, marketed by the company Eastman under the registered trademark Saflex® RB11, the two main faces of which have a roughness of between 2.85 and 4.18 ⁇ m.
• the ink is mixed for 30 minutes, its viscosity is measured, a diluent is added if the viscosity is not compliant, then the ink is mixed for 30 minutes before applying the ink to the screen printing screen.
• Inks of different compositions and colors are used.
• the ink is dried, then the partial layer of PVB is joined to the second partial layer of unprinted PVB, so that the printing is at the interface of the two partial layers. Then a conventional assembly is carried out (deaeration by placing under vacuum, subjecting to a rise in temperature and pressure) of the two partial layers of PVB with two sheets of float soda-lime glass. A high optical quality color printing high mechanical quality laminated glazing as described above is obtained.
• the 10 min “dry to touch” time is short and compatible with an industrial continuous line process.
• a black ink of composition detailed in the table below is used, in which all the proportions are indicated in percentages by weight.
• the level of [OH] of the polyvinylbutyral corresponds to a percentage by mass of poly (vinyl alcohol) of 18%.
• the wetting agent also acts as a plasticizer, that is to say it allows greater deformation of the printed ink film without degradation of its optical properties.
• This is dimethylcyclohexyl phthalate.
• the specific surface of the carbon black is 65 m 2 / g, values of 40 to 150 m 2 / g are generally suitable.
• the diester is a mixture of 60% by mass of dimethyl glutarate, 20% by mass of dimethyl succinate and 20% by mass of dimethyl adipate.
• the surface tension modifier is a copolymer of 2-ethylhexyl acrylate; it does not contain silicone.
• the Brookfield viscosity of the ink at 20 ° C. is 11 Pa.s, values of between 9 and 13 Pa.s being suitable within the framework of the invention. This measurement is carried out as follows. The viscosity of the ink is reduced to a stable value by rotating for at least 8 hours of a roll in the ink. A sample of the latter is taken, on which the viscosity is measured by means of a cone-plane viscometer.
• the glycol diether solvent is triethylene glycol dimethyl ether. Prints in all other colors are obtained by introducing, in the gray ink above, pigments, dyes or phosphors.
• the pigments defined in particular by their CAS No. (Chemical Abstracts Service, American Chemical Society) and their CI No. (Color Index), can be chosen from those in the table below.
• phosphors As examples of phosphors, the following, defined by their formula, can be used.
• Oxidation of the PVB substrate prior to printing such as by plasma flame treatment, promotes this printing.
• solvent inks other than those based on PVB (resin) binder such as epoxy ink, nitrocellulose, polyamide, polyvinyl chloride, polyurethane, among others, can be used for screen printing, and all other printing processes.
• printing inkjet, offset, flexography, pad printing, digital printing.
• the method of the invention makes it possible to easily obtain good coverage resulting in a small amount of "pinholes" which does not affect transparency in an unacceptable manner; a required opacity corresponding to an optical density at least equal to 3, or to 4 according to the request, measured by an X-Rite 341 apparatus; a resolution and a print appearance of qualities similar to those of enamelling on glass.
• the printed laminated glazing manufactured by the process of the invention makes it possible to pass successfully the tests boil tests (in English "boil test") of variable conditions of implementation according to the national / regional regulations, according to the automotive standard R43. ; bake tests under variable implementation conditions according to national / regional regulations, according to automotive standard R43; resistance to heat and humidity of the glazing after aging H14 according to automotive standard DV471167; and resistance to aging to severe BF climatic cycles according to automotive standard DV471309.

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• Engineering & Computer Science (AREA)
• Ceramic Engineering (AREA)
• Joining Of Glass To Other Materials (AREA)
• Laminated Bodies (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=71894996

Family Applications (1)

Country Status (5)

Family Cites Families (7)

• 2020
  • 2020-05-18 FR FR2004960A patent/FR3110108B1/fr active Active
• 2021
  • 2021-05-06 US US17/926,057 patent/US20230182451A1/en active Pending
  • 2021-05-06 CN CN202180002575.5A patent/CN113966277A/zh active Pending
  • 2021-05-06 WO PCT/FR2021/050777 patent/WO2021234238A1/fr unknown
  • 2021-05-06 EP EP21732431.8A patent/EP4153429A1/de active Pending

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