WO2018069413A1 - Procédé de fabrication d'un revêtement pourvu de marquages sur une surface ou sur une partie d'une surface d'un objet - Google Patents

Procédé de fabrication d'un revêtement pourvu de marquages sur une surface ou sur une partie d'une surface d'un objet Download PDF

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Publication number
WO2018069413A1
WO2018069413A1 PCT/EP2017/075975 EP2017075975W WO2018069413A1 WO 2018069413 A1 WO2018069413 A1 WO 2018069413A1 EP 2017075975 W EP2017075975 W EP 2017075975W WO 2018069413 A1 WO2018069413 A1 WO 2018069413A1
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WO
WIPO (PCT)
Prior art keywords
layer
laser
polymer
coating
sensitive
Prior art date
Application number
PCT/EP2017/075975
Other languages
German (de)
English (en)
Inventor
Fred Michael Pfeifer
Sascha Moos
Alexander Dragässer
Original Assignee
Weilburger Coatings Gmbh
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 Weilburger Coatings Gmbh filed Critical Weilburger Coatings Gmbh
Priority to EP17791966.9A priority Critical patent/EP3526052A1/fr
Publication of WO2018069413A1 publication Critical patent/WO2018069413A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/267—Marking of plastic artifacts, e.g. with laser
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/28—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using thermochromic compounds or layers containing liquid crystals, microcapsules, bleachable dyes or heat- decomposable compounds, e.g. gas- liberating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
    • B41M7/0054—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using protective coatings or film forming compositions cured by thermal means, e.g. infrared radiation, heat
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J36/00—Parts, details or accessories of cooking-vessels
    • A47J36/02—Selection of specific materials, e.g. heavy bottoms with copper inlay or with insulating inlay
    • A47J36/025—Vessels with non-stick features, e.g. coatings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/28—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using thermochromic compounds or layers containing liquid crystals, microcapsules, bleachable dyes or heat- decomposable compounds, e.g. gas- liberating
    • B41M5/282—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using thermochromic compounds or layers containing liquid crystals, microcapsules, bleachable dyes or heat- decomposable compounds, e.g. gas- liberating using thermochromic compounds
    • B41M5/283—Inorganic thermochromic compounds

Definitions

  • the present invention relates to a process for producing a coating on a surface or part of a surface of an article, a coating obtainable by the process, and a coated article.
  • Layers of organic polymers can also be damaged in the interface by the entry of laser energy and are no longer suitable for food contact.
  • the object of the invention is to provide a method with which efficient as long as possible marking can be produced in a suitable coating for food contact.
  • a colorless or transparent covering layer or sealing is applied again, in particular of a fluorine-containing polymer. Through this cover layer remains the printing or
  • the solution of the invention particularly includes the use especially
  • temperature-stable fluoropolymer layers as well as the pigmentation of at least one of these layers with laser-sensitive pigments or colorants, and the application of a cover layer, preferably also consisting of these polymers or at least predominantly comprising these polymers.
  • the first layer comprising a laser-sensitive pigment and / or laser-sensitive dye
  • a second layer comprising a second polymer to the first layer, wherein the second layer forms a cover layer through which the laser marking is visible.
  • a second layer is applied, which is transparent.
  • the second polymer is transparent in the second layer. When the second polymer is applied in the layer, it is at least then transparent.
  • Visibility of the laser marking means visibility to the human eye, i. a visual perceptibility, preferably at least in daylight.
  • Laser marking is applied to the surface.
  • laser marking is generated in the first layer
  • a laser mark is generated inside the first layer
  • the first polymer is a fluorine-containing polymer, in particular a fluorine-containing polyolefin, preferably polytetrafluoroethylene (PTFE), a perfluoroalkoxy (PFA) polymer, fluorinated ethylene-propylene (FEP, copolymer of hexafluoropropylene and tetrafluoroethylene), or a Blend of it.
  • PTFE polytetrafluoroethylene
  • PFA perfluoroalkoxy
  • FEP fluorinated ethylene-propylene
  • FEP copolymer of hexafluoropropylene and tetrafluoroethylene
  • the first polymer may be a copolymer, in particular a copolymer of the
  • Tetrafluoroethylene with one or more of the following comonomers perfluoroalkyl vinyl ether having 1 to 3 carbon atoms in the alkyl group or hexafluoropropylene, wherein the
  • Comonomer content is preferably at most 5%, based on the weight of the copolymer.
  • the first polymer in one embodiment, has a melt viscosity at 380 ° C greater than 50 Pa ⁇ s and a melting point greater than 320 ⁇ , especially when the first polymer is polytetrafluoroethylene.
  • the first polymer has a melt viscosity at 372 ⁇ ⁇ greater than 1000 Pa ⁇ s and a melting point of at least 305 ' ⁇ , in particular when the first polymer is a copolymer (copolymer) of tetrafluoroethylene with the following comonomers: perfluoroalkyl vinyl ether with 1 - 3 C atoms in the alkyl group or hexafluoropropylene, wherein the comonomer content is preferably at most 5%, based on the weight of the mixed polymer.
  • the first polymer has a melt viscosity at 380 ° C greater than 1000 Pa ⁇ s and a melting point of at least 225 ° C, especially when the first polymer is a copolymer of tetrafluoroethylene with hexafluoropropylene, the comonomer being Content is preferably at most 5%, based on the weight of the mixed polymer.
  • the second polymer is a fluorine-containing polymer, especially a fluorine-containing polyolefin, preferably polytetrafluoroethylene, a perfluoroalkoxy polymer, fluorinated ethylene-propylene (FEP, copolymer of hexafluoropropylene and tetrafluoroethylene), or a mixture thereof.
  • a fluorine-containing polyolefin preferably polytetrafluoroethylene, a perfluoroalkoxy polymer, fluorinated ethylene-propylene (FEP, copolymer of hexafluoropropylene and tetrafluoroethylene), or a mixture thereof.
  • the second polymer may be a copolymer, in particular a copolymer of the
  • Tetrafluoroethylene with one or more of the following comonomers perfluoroalkyl vinyl ether having 1 to 3 carbon atoms in the alkyl group or hexafluoropropylene, wherein the
  • Comonomer content is preferably at most 5%, based on the weight of the copolymer.
  • the second polymer in one embodiment has a melt viscosity at 380 ° C greater than 50 Pa ⁇ s and a melting point above 320 ° C, especially when the second polymer is polytetrafluoroethylene.
  • the second polymer in another embodiment, has a melt viscosity at 372 ⁇ C greater than 1000 Pa ⁇ s and a melting point of at least 305 ° C., especially when the second polymer is a copolymer (copolymer) of tetrafluoroethylene with the following comonomers: perfluoroalkyl vinyl ether with 1 - 3 C atoms in the alkyl group or hexafluoropropylene, wherein the comonomer content is preferably at most 5%, based on the weight of the mixed polymer.
  • the second polymer has a melt viscosity at 380 ° C greater than 1000 Pa ⁇ s and a melting point of at least 225 ° C, especially when the second polymer is a mixed polymer (copolymer) of the invention
  • Tetrafluoroethylene with hexafluoropropylene wherein the comonomer content is preferably at most 5%, based on the weight of the mixed polymer.
  • the second polymer has transparency at least when applied as a layer.
  • the second polymer may be transparent per se, or transparent when applied as a layer.
  • the second polymer may comprise a pigment or colorant, provided that there is still transparency of the layer.
  • the layer thickness of the second layer can be chosen so that a transparency is achieved. For this purpose, it may be provided to set the smallest possible layer thickness.
  • layer is according to the invention both a moist (or otherwise
  • wet layer in particular to understand a wet applied layer, as well as a dry layer, in particular a dry applied layer, or a layer which is obtained by drying a wet applied layer.
  • a layer (first second, zeroth, etc.) can thus be applied moist and dried in a further process step.
  • the layer thickness can be changed.
  • the application of a layer may be by spraying (with or without electrostatic support), spraying, rolling (with and against), or curtain coating, or by immersing the surface or part thereof to be coated in a corresponding polymer or in a composition comprising this polymer contains.
  • the first layer as a dispersion, in particular as a suspension, of the first polymer in a liquid on the
  • the dispersion may contain other ingredients mentioned above. This is a special one
  • the dispersion is preferably an aqueous dispersion, in particular a PTFE dispersion, perfluoroalkoxy (PFA) polymer dispersion, and / or fluorinated ethylene-propylene (FEP, copolymer of hexafluoropropylene and
  • Tetrafluoroethylene Tetrafluoroethylene dispersion.
  • the proportion of the first polymer in a moist composition to be applied as a layer, in particular a dispersion, is preferably about 10 to 25 percent by weight.
  • a first layer may include a resin to enhance adhesion to a substrate.
  • suitable resins include, but are not limited to, polyamideimide, polyphenylene sulfide (PPS), polyethersulfone (PES), polyetheretherketone (PEEK), silicone resin and / or polysulfone.
  • PPS polyphenylene sulfide
  • PES polyethersulfone
  • PEEK polyetheretherketone
  • silicone resin and / or polysulfone.
  • the proportion of such a resin is in a moist, applied as a layer composition, in particular a dispersion, preferably about 3 - 8 weight percent.
  • the irradiation of the first layer with the laser beam takes place in a wet state of the first layer.
  • a layer is applied wet and then irradiated with the laser beam.
  • Layer is still present in the form of a moist surface film.
  • the first layer is partially dried and then the irradiation of the first layer with the laser beam takes place.
  • the moist layer can thus be deprived of moisture before irradiation, but in this embodiment no complete drying takes place.
  • the second layer is incorporated as a dispersion
  • the dispersion may contain other ingredients mentioned herein.
  • the dispersion is preferably an aqueous dispersion, in particular a PTFE dispersion, perfluoroalkoxy (PFA) polymer dispersion, and / or fluorinated ethylene-propylene (FEP, copolymer of hexafluoropropylene and tetrafluoroethylene) dispersion.
  • the proportion of the second polymer in a moist composition to be applied as a layer, in particular a dispersion is preferably about 40-60 percent by weight.
  • the first layer may have been dried, partially dried or not dried prior to application of the second layer.
  • the second layer is applied to the first layer, as long as the first layer is still moist, in particular while the first layer is still in the form of a moist layer
  • the term "moist" may be defined such that a partial mixing of the first moist layer and the second moist layer can take place or the moisture of the first layer is sufficient for this.
  • the method comprises drying the first layer and / or the second layer that have been applied as wet layers. You then get one dried first and second layers and as a result a dried coating. The drying can be done individually (even one of the layers can be dried,
  • a dry can also be called curing.
  • the drying or curing may be done by leaving a surface film formed by a wet-applied layer, for example, at
  • Room temperature which means a temperature of 20-25 ° C.
  • the drying is preferably carried out at elevated temperature, that is by heating, for example in a range of ⁇ ⁇ ' ⁇ to 250' ⁇ , preferably 60 to ⁇ ⁇ ' ⁇ .
  • a warming can be carried out at elevated temperature, that is by heating, for example in a range of ⁇ ⁇ ' ⁇ to 250' ⁇ , preferably 60 to ⁇ ⁇ ' ⁇ .
  • volatiles may escape from the composition, such as a liquid phase of a dispersion, leaving a solid coating formed wholly or substantially of the corresponding polymer and optionally further ingredients herein.
  • dispersed particles of polymer are combined and form a layer of the polymer, in particular of polymer particles, and optionally further components mentioned herein. The polymer particles are stored together in the layer, but still individually identifiable.
  • the drying can be carried out sequentially, ie first the drying of a first, moistly applied layer, then the application and subsequent drying of a second, moistly applied layer. However, preference is given to applying the second layer before the first layer has dried.
  • the process may comprise: heating to a temperature of - ⁇ ⁇ , preferably> 320 q C, in particular SS ⁇ O 'O.
  • the upper limit of the heating is preferably 450 ° C, in particular 400 ⁇ , each of these upper limits being freely combinable with each of the lower limits mentioned.
  • Particularly preferred ranges are> 300-450 ° C, preferably> 320-450 ° C, in particular> 350-450 ⁇ €, or> 300-400 ° C, preferably> 320-400 ' ⁇ , in particular> 350-400 ° C ,
  • Said heating takes place in particular after the above-mentioned drying of the first and / or second layer, in particular after the drying of the first and first layer, or after the drying of the second layer.
  • fusion of polymer particles also referred to as "sintering” takes place formed, in particular a film of said first and / or second polymer, in particular of said second polymer.
  • the particles are preferably no longer individually identifiable and there is a continuous layer or film.
  • a laser marking is basically not limited in their nature and design. Possible is a laser marking in the form of a label, a pattern, a logo, a sign and a combination of one or more of them.
  • the selection of the laser-sensitive pigment and / or laser-sensitive colorant is generally carried out in such a way that it has the highest possible absorption in the wavelength range of the available laser light.
  • the wavelength ranges of the laser light used are basically not subject to any restrictions.
  • Suitable lasers generally have a wavelength in the range of 157 nm to 10.6 ⁇ , preferably in the range of 532 nm to 10.6 ⁇ . For example, here C0 2 laser (10.6 ⁇ ) and
  • Typical excimer lasers have the following wavelengths: F2 excimer laser (157 nm), ArF excimer laser (193 nm), KrCl excimer laser (222 nm), KrF excimer laser (248 nm), XeCl excimer laser (308 nm), XeF Excimer laser (351 nm), frequency multiplied NdYAG lasers with wavelengths of 532 nm (frequency doubled), 355 nm (frequency tripled) or 265 nm (frequency quadrupled). Particular preference is given to using NdYAG lasers and C0 2 lasers.
  • the energy densities of the lasers used according to the invention are generally in the range from 0.3 mJ / cm 2 to 50 J / cm 2 , preferably 0.3 mJ / more preferably at a wavelength in the range from 1000 to 1100 nm. cm 2 to 10 J / cm 2 .
  • the pulse frequency is generally in the range of 1 to 30 kHz.
  • the laser-sensitive pigment or the laser-sensitive colorant changes its color under the influence of laser light or leads to a color change of a matrix which is obtainable from the aqueous composition when the non-stick coating is produced and in which the laser-sensitive pigment and / or the laser-sensitive colorant is incorporated.
  • the laser-sensitive pigment and the laser-sensitive dye are also known as
  • a "change in color” or “color change” may be a change from one hue to another, such as from yellow to red, or from transparent to black but also a change in brightness, for example from light brown to dark brown, a change in brightness can be achieved by changing the hue of a colorant of a colorant combination.
  • the energy input of the laser into the first layer if wet, it can be dried in a region in which a laser marking takes place.
  • the laser-sensitive pigment and / or the laser-sensitive colorant is selected from a metal oxide, for example the metals copper, bismuth, tin, zinc, silver antimony, manganese, iron, nickel and chromium, a metal hydroxide, for example the metals copper, Bismuth, tin, zinc, silver, antimony, manganese, iron, nickel and chromium, a metal sulfide, for example, the metals copper, bismuth, tin, zinc, silver antimony, manganese, iron, nickel and chromium, or a
  • Metal phosphate for example, the metals copper, bismuth, tin, zinc, silver antimony, manganese, iron, nickel and chromium, or any mixture of two or more of these compounds.
  • a mixture may also be a mixture of several oxides, hydroxides, sulfides or phosphates.
  • a mixture of titanium dioxide and tin-antimony oxide can be used. Also usable
  • Ru ß amorphous
  • graphite lamellar
  • the laser-sensitive pigment is on a carrier particle
  • the type of laser-sensitive pigment and / or laser-sensitive colorant is not limited to a particular one.
  • the following substances are also usable:
  • EP-A-190,997 a method for laser marking is known in which, inter alia, titanium oxide and antimony oxide are incorporated as pigments in a polymeric material. From EP-A-330,869 the use of titanium oxide white pigment is known.
  • EP-A-400,305 and EP-A-542,115 describe the use of copper hydroxide phosphate or of molybdenum (IV) oxide as laser pigments.
  • US-A-5,063,137 discloses, inter alia, the use of anhydrous metal phosphates and phosphoric acid-based ones Glasses revealed.
  • EP-A-797,511 describes the use of platelet-shaped
  • WO-A-98/58805 discloses a series of copper phosphates as laser pigments.
  • WO-A-99/55773 describes inter alia the
  • DE-A-100 34 472 describes the use of surface-modified with certain silicon compounds
  • EP-A-753,536 describes the use of at least two types of metal oxides.
  • EP-A-105,451 describes polyphenylene sulfide molding compositions which have been modified for laser marking with selected additives, for example with the combination of lead chromate and lead molybdate, with nickel antimony titanate or with cobalt zinc silicon. From DE 102004050481 the use of tin phosphate as a pigment for laser marking is known.
  • DE 102004050480 describes the
  • Metal phosphates such as orthophosphates, polyphosphates, pyrophosphates and hydroxide phosphates, in particular copper phosphates, tin phosphates, iron phosphates, nickel phosphates, molybdenum phosphates, cobalt phosphates, manganese phosphates, antimony phosphates and copper hydroxide phosphate.
  • the laser-sensitive pigment and / or laser-sensitive colorant may be in particulate form. This is meant to mean that the pigment or colorant is finer in form
  • the pigment or colorant an average particle size (D50) of less than 100 ⁇ preferably less than 15 ⁇ particularly preferably less than 0.5 ⁇ .
  • the proportion of the laser-sensitive pigment and / or laser-sensitive colorant in a moist composition to be applied as a layer is preferably about 0.5-30% by weight, more preferably 1-10% by weight.
  • the proportion of laser-sensitive pigment and / or laser-sensitive colorant in the first layer can be 0.5 to 20% by weight.
  • the stated amount range relates to the sum of the two.
  • the surface which is to be coated according to the invention can already be formed from a different coating, even in the case of further methods and articles described herein.
  • the item already has one
  • the surface may be formed of a polymer, in particular a fluorine-containing polymer, and
  • this layer can be referred to as a "zeroth" layer, to which a mentioned first layer and a second layer are then applied
  • the mentioned zeroth layer may be referred to as the first layer (or 1 .1., 1 .2., Etc. if there are multiple zeroth layers), the first layer as the second, and the second layer as the third.
  • the mentioned zeroth layer can be applied in the moist state, preferably as a dispersion, particularly preferably as an aqueous dispersion.
  • a zeroth layer may include a resin to improve adhesion to a substrate.
  • Exemplary suitable resins include, but are not limited to, polyamideimide, polyphenylene sufide (PPS), polyethersulfone (PES), polyetheretherketone (PEEK).
  • PPS polyphenylene sufide
  • PES polyethersulfone
  • PEEK polyetheretherketone
  • composition in particular a dispersion, preferably about 3 - 8 weight percent.
  • a wet applied zeroth layer may be dried, it being preferred to apply the first layer before the zeroth layer is dried.
  • a surface basically any surface is conceivable.
  • Design of the surface for example, the shape design, are not limited in principle.
  • the material of the surface is not limited. It has been found that in the present invention, a surface of metal, for example steel, stainless steel or aluminum, ceramic, glass or glass-ceramic is advantageous.
  • Mentioned zeroth layer may be applied to a metallic or ceramic surface of an article and then forms the surface to be coated according to the invention.
  • the surface which is to be coated according to the invention with a so-called zeroth layer can also already be formed from a different coating, even in the case of further methods and articles described herein.
  • the article already has a coating on which after a
  • zerte layer a first layer and a second layer is applied.
  • the term "zeroth" is to be understood in the context of the invention only as a numbering to distinguish the layers, but not interpreted as meaning that no further layer may be present underneath.
  • the thickness of the coating comprising or formed from at least the first and the second layer, in particular in the range of 10 - 150 ⁇ , preferably 20 - 40 ⁇ , based on a dry or dried coating.
  • the surface to be coated or the part of the surface to be coated can be pretreated mechanically and / or chemically before the application of the first layer or of a zeroth layer mentioned above.
  • the surface can be roughened, for example by grinding or sandblasting. This gives an even better adhesion of the coating on the surface.
  • Interlayer are applied before applying the aqueous
  • the intermediate layer can be, for example, a metal oxide layer, in particular an aluminum oxide layer.
  • An intermediate layer can by a thermal spraying process can be obtained. As particularly advantageous has the
  • the intermediate layer advantageously serves as adhesion promoter and hard substrate between the metal surface and the coating according to the invention.
  • the intermediate layer may also include a chemically formed conversion layer such as a phosphating, a metal layer such as a
  • Aluminization or a ceramic frit Aluminization or a ceramic frit.
  • the first layer and preferably a zeroth layer, if present, may contain, as further component, a color pigment, and / or an attrition setting agent and / or a
  • Anticorrosion agents with a color pigment is particularly preferred.
  • Color pigment is capable of giving the coating a desired color, which is a basic color of the coating. In this basic color can later
  • the color pigment is to be distinguished from a laser-sensitive pigment.
  • the color of the color pigment and the color of the laser-sensitive pigment and / or the laser-sensitive colorant (laser post-treatment) or the color imparting a laser-sensitive pigment and / or laser-sensitive colorant to a surrounding matrix after laser treatment are preferably selected such that they contrast with one another are.
  • the color of the color pigment may be a light color and the color produced by the laser-sensitive pigment may be dark or vice versa.
  • Exemplary color pigments are titanium dioxide, spinel black, Ru.beta., Nickel and
  • the proportion of a color pigment in a moist composition to be applied as a layer, in particular a dispersion, is preferably about 0.3-20
  • An abrasive is a substance that increases the abrasion resistance of the coating.
  • An abrasion-resistant agent is contained in particular in the second layer. The share of one
  • Abriebfestigers is in a moist, applied as a layer composition, in particular a dispersion, preferably about 0.05 to 1 weight percent.
  • exemplary abrasion strengtheners are corundum, quartz flour and silicon carbide.
  • a layer (first, second, zeroth, etc.) may contain a wetting and / or sintering aid. Exemplary representatives of these are alkyl (C5-C15) phenoloxethylates, fatty alcohol (C10-C20) oxethylates, sodium alkylsulfates (C10-C20), ammonium lauryl sulfate, organopolysiloxanes and ethyl acrylate copolymers.
  • the proportion of a wetting and / or sintering aid in a moist composition to be applied as a layer, in particular a dispersion is preferably about 1 to 20 percent by weight.
  • a layer (first, second, zeroth, etc.) may contain a silica sol.
  • a silica sol is in a wet state of the layer. After drying a layer, a dried silica sol is formed in the layer which may contain silicic acids and / or, depending on the state of drying, silicon dioxide.
  • the proportion of a silica sol in a moist composition to be applied as a layer, in particular a dispersion is preferably about 2-8% by weight.
  • proportions of components in percent by weight are given above, in the case of a moist composition a proportion of liquid, preferably water, is added, which supplements the proportions of other components to 100% by weight.
  • a proportion of liquid preferably water
  • the selection is made such that the sum of these components (without liquid or liquid phase in a dispersion) is less than 100 wt .-%.
  • the invention relates to a coating, in particular a coating with non-stick properties, obtainable by a previously mentioned method.
  • Also disclosed by the invention is a coating comprising
  • a first layer comprising a first polymer which has a laser-sensitive pigment and / or a laser-sensitive colorant and which has a laser marking in sections or sections,
  • a second layer comprising a second polymer applied to the first layer, wherein through the second layer, in particular by the second polymer, a cover layer is formed, through which the laser marking is visible.
  • the second layer is a transparent layer.
  • the coating may have the subject features, individually or in any combination
  • Another aspect of the invention is an article comprising a surface which is at least partially coated with a previously mentioned coating.
  • the article is obtainable by a method described above, in particular by applying layers as described above on its surface or part of its surface. Particularly preferred are metallic, ceramic and glass-ceramic surfaces.
  • An article is a commodity in one embodiment.
  • Commodity item is defined in particular as in German food,
  • a commodity is in particular selected from:
  • objects intended not to be in temporary contact with the human body such as clothing, bedding, masks,
  • the object is a household object or
  • Particularly suitable articles according to the invention are selected from
  • the coating has a laser marking.
  • a laser-marked coating is available after an o.g. Method.
  • Fig. 1 shows the structure of a coating according to the invention.
  • a preformed aluminum blank is industrially cleaned (degreased) and
  • a roughness Ra of about 3 to 4 ⁇ is produced in order to achieve a good bond with the subsequent coating.
  • the thus prepared blank is then provided with the base layer and pre-dried at temperatures of 60-120 ° C.
  • a two-layer system already contains the base layer (first layer according to general description), the laser-sensitive pigments and colorants.
  • the base layer (then zeroth layer according to general description) is overcoated with a laser-sensitive pigmented middle layer (then first layer according to the general description).
  • This structure base layer or base layer with middle layer is now treated with the laser.) Predrying of the layer which is laser-marked is here optional, but not absolutely necessary.
  • the Trumpf (YAG laser) Vectormark compact VMC1 has speeds of 3000-5000 mm / s at a pulse frequency of 20-40 kHz and Full performance proven for a good labeling result.
  • the cover layer of the system is then applied and baked accordingly.
  • Base layer (first layer according to general description):
  • Middle layer (first layer according to general description):
  • binder resins other conventional resins such as PPS, PES, PEEK, etc. may be used besides polyamideimide.
  • the fluoropolymer compositions are also exemplary only.
  • PTFE may also be used, for example. PFA, FEP or combinations thereof are used. The job can be done by industry standard
  • Fig. 1 shows an article, for example a commodity, with a
  • Coating which can be obtained by a process according to the invention according to the above examples. Shown is a section of a metal body 1, e.g.
  • the base layer 3 has the surface 4.
  • Base layer 3 is formed. On the surface 4 of the base layer 3 is / is the
  • the coating consists of a first layer 5 which has the laser-sensitive pigment 6 shown as dots.
  • the pigments 6 are incorporated in a matrix comprising the first polymer or formed from the first polymer.
  • the first layer 5 may be wet, e.g. as a dispersion, applied or be and later dried. A wet layer can form a film.
  • One in the first layer 5 (which is also referred to as the middle layer in the above example) introduced laser marking is not shown. They are obtained by irradiating the pigments 6. The laser marking can be introduced into the depth of the first layer 5 or only onto the surface 7 of the first layer 5.
  • the second, transparent layer 8 is applied, the one
  • the second layer 8 comprises the second polymer or is formed from the second polymer.
  • the second layer 8 may be wet, e.g. as a dispersion, applied or be and later dried.
  • the coating according to the invention is formed from the first layer 5 and the second layer 8.
  • the object to be coated is formed from the body 1 and the base layer 3.
  • the first layer 5 and the second layer 8 may also be applied directly to the body 1, thus omitting the base layer 3 (zeroth layer).
  • one or more further layers, in addition to the base layer 3, may be present between the body 1 and the second layer 5.

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)

Abstract

La présente invention concerne un procédé de fabrication d'un revêtement (5, 8) sur une surface (4) ou sur une partie d'une surface (4) d'un article, comprenant les étapes suivantes : a) le dépôt d'une première couche (5), comprenant un premier polymère, sur la surface à revêtir ou sur la partie de la surface à revêtir, la première couche comprenant un pigment sensible au laser (6) et/ou un colorant sensible au laser ; b) l'irradiation de la première couche, au moins par endroits ou par sections, au moyen d'un faisceau laser de telle sorte qu'un marquage laser est réalisé sur/dans la première couche (5) ; c) l'application d'une deuxième couche (8), comprenant un deuxième polymère, sur la première couche, le deuxième polymère formant une couche de recouvrement à travers laquelle le marquage au laser est visible. L'invention concerne en outre un revêtement pouvant être obtenu selon ledit procédé et un objet pourvu d'un tel revêtement.
PCT/EP2017/075975 2016-10-12 2017-10-11 Procédé de fabrication d'un revêtement pourvu de marquages sur une surface ou sur une partie d'une surface d'un objet WO2018069413A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP17791966.9A EP3526052A1 (fr) 2016-10-12 2017-10-11 Procédé de fabrication d'un revêtement pourvu de marquages sur une surface ou sur une partie d'une surface d'un objet

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016219858.0 2016-10-12
DE102016219858.0A DE102016219858A1 (de) 2016-10-12 2016-10-12 Verfahren zur Herstellung einer Beschichtung mit Markierungen auf einer Oberfläche oder einem Teil einer Oberfläche eines Gegenstandes

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WO2018069413A1 true WO2018069413A1 (fr) 2018-04-19

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DE (1) DE102016219858A1 (fr)
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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202022102651U1 (de) 2022-05-13 2022-05-30 Unilever Global Ip Limited Wasserlösliche Kapseln enthaltende Packung
DE202022102650U1 (de) 2022-05-13 2022-06-13 Unilever Global Ip Limited Wasserlösliche Kapseln enthaltende Packung
DE202022102610U1 (de) 2021-05-14 2022-07-18 Unilever Global Ip Limited Wasserlösliche Kapseln enthaltende Packung
DE202022102611U1 (de) 2021-05-14 2022-08-09 Unilever Global Ip Limited Wasserlösliche Kapseln enthaltende Packung
WO2022238053A1 (fr) 2021-05-14 2022-11-17 Unilever Ip Holdings B.V. Emballage contenant des capsules hydrosolubles
WO2022238495A1 (fr) 2021-05-14 2022-11-17 Unilever Ip Holdings B.V. Emballage contenant des capsules hydrosolubles
WO2022238179A1 (fr) 2021-05-14 2022-11-17 Unilever Ip Holdings B.V. Emballage contenant des capsules hydrosolubles
WO2022248466A1 (fr) 2021-05-25 2022-12-01 Unilever Ip Holdings B.V. Emballage contenant des capsules hydrosolubles
WO2023078594A1 (fr) 2021-11-05 2023-05-11 Unilever Ip Holdings B.V. Emballage contenant des capsules solubles dans l'eau
WO2023104646A1 (fr) 2021-12-07 2023-06-15 Unilever Ip Holdings B.V. Emballage contenant des capsules hydrosolubles
EP4339121A1 (fr) 2022-09-14 2024-03-20 The Procter & Gamble Company Produit de consommation

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EP0190997A2 (fr) 1985-02-05 1986-08-13 Ciba-Geigy Ag Ecriture par laser sur systèmes pigmentés
EP0330869A1 (fr) 1988-02-18 1989-09-06 Bayer Ag Matière d'inscription par laser
EP0400305A2 (fr) 1989-05-27 1990-12-05 Hüls Aktiengesellschaft Matériaux polymères d'inscription par laser
US5063137A (en) 1989-11-09 1991-11-05 Dainippon Ink And Chemicals, Inc. Laser-marking method and resin composition for laser-marking
EP0447032A2 (fr) * 1990-03-15 1991-09-18 British Aerospace Public Limited Company Composition de pigment blanc marquable par laser
EP0542115A1 (fr) 1991-11-11 1993-05-19 BASF Aktiengesellschaft Compositions de moulage thermoplastiques avec pigmentation sensible au laser
EP0797511A1 (fr) 1994-05-05 1997-10-01 MERCK PATENT GmbH Matieres plastiques marquables par laser
US5489639A (en) 1994-08-18 1996-02-06 General Electric Company Copper salts for laser marking of thermoplastic compositions
EP0753536A1 (fr) 1995-07-13 1997-01-15 Teijin Limited Composition de résine thermoplastique apte à l'inscription par laser
EP0764683A1 (fr) 1995-09-21 1997-03-26 Bayer Ag Composition polymères, marquable au laser
EP0808866A2 (fr) 1996-05-24 1997-11-26 Bayer Ag Compositions polymères à mouler, marquable au laser
WO1998058805A1 (fr) 1997-06-19 1998-12-30 Merck Patent Gmbh Plastiques permettant le marquage au laser
WO1999055773A1 (fr) 1998-04-29 1999-11-04 General Electric Company Composition pour le marquage au laser
EP0974404A2 (fr) * 1998-07-24 2000-01-26 Weilburger Lackfabrik J. Grebe GmbH Article avec un revêtement contenant un pigment, un polymère fluoré et une résine liante, procédé pour sa fabrication et son utilisation
DE19905358A1 (de) 1999-02-10 2000-08-17 Budenheim Rud A Oetker Chemie Verwendung von Alkalikupferdiphosphat
WO2001000719A1 (fr) 1999-06-30 2001-01-04 Dsm N.V. Composition de polymere marquable au laser
WO2001078994A1 (fr) 2000-04-17 2001-10-25 General Electric Company Composition pour marquage au laser
DE10034472A1 (de) 2000-07-15 2002-01-24 Budenheim Rud A Oetker Chemie Die Laserbeschriftbarkeit von Kunststoffen förderndes Material, Verfahren zu dessen Herstellung und dessen Verwendung
EP1190988A2 (fr) 2000-09-22 2002-03-27 dmc2 Degussa Metals Catalysts Cerdec AG Composition pour marquage au laser à base de bismuth et son procédé de préparation et d utilisation
DE10053639A1 (de) 2000-10-28 2002-05-02 Budenheim Rud A Oetker Chemie Verwendung von Eisen-, Cobalt-, Nickel- oder Molybdänsalzen
WO2002041325A1 (fr) * 2000-11-14 2002-05-23 Coltec Industrial Products Inc Bandes de polytetrafluoroethylene resistantes a l'abrasion
DE102004050571A1 (de) 2004-10-15 2006-04-20 Ticona Gmbh Lasermarkierbare Formmassen und daraus erhältliche Produkte und Verfahren zur Lasermarkierung
DE102004050480A1 (de) 2004-10-15 2006-04-27 Chemische Fabrik Budenheim Kg Pigment für laserbeschriftbare Kunststoffe und dessen Verwendung
DE102004050481A1 (de) 2004-10-15 2006-04-27 Chemische Fabrik Budenheim Kg Verwendung von Zinnphosphaten
EP2052032A1 (fr) 2006-08-14 2009-04-29 Chemische Fabrik Budenheim KG Matière polymère inscriptible au laser
DE102013101096A1 (de) * 2013-02-04 2014-08-07 Weilburger Coatings Gmbh Sol-Gel-Fluorpolymer-Beschichtung

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022238440A1 (fr) 2021-05-14 2022-11-17 Unilever Ip Holdings B.V. Emballage contenant des capsules hydrosolubles
DE202022102610U1 (de) 2021-05-14 2022-07-18 Unilever Global Ip Limited Wasserlösliche Kapseln enthaltende Packung
DE202022102611U1 (de) 2021-05-14 2022-08-09 Unilever Global Ip Limited Wasserlösliche Kapseln enthaltende Packung
WO2022238449A1 (fr) 2021-05-14 2022-11-17 Unilever Ip Holdings B.V. Emballage contenant des capsules hydrosolubles
WO2022238053A1 (fr) 2021-05-14 2022-11-17 Unilever Ip Holdings B.V. Emballage contenant des capsules hydrosolubles
WO2022238495A1 (fr) 2021-05-14 2022-11-17 Unilever Ip Holdings B.V. Emballage contenant des capsules hydrosolubles
WO2022238179A1 (fr) 2021-05-14 2022-11-17 Unilever Ip Holdings B.V. Emballage contenant des capsules hydrosolubles
WO2022248466A1 (fr) 2021-05-25 2022-12-01 Unilever Ip Holdings B.V. Emballage contenant des capsules hydrosolubles
WO2023078594A1 (fr) 2021-11-05 2023-05-11 Unilever Ip Holdings B.V. Emballage contenant des capsules solubles dans l'eau
WO2023104646A1 (fr) 2021-12-07 2023-06-15 Unilever Ip Holdings B.V. Emballage contenant des capsules hydrosolubles
DE202022102650U1 (de) 2022-05-13 2022-06-13 Unilever Global Ip Limited Wasserlösliche Kapseln enthaltende Packung
DE202022102651U1 (de) 2022-05-13 2022-05-30 Unilever Global Ip Limited Wasserlösliche Kapseln enthaltende Packung
EP4339121A1 (fr) 2022-09-14 2024-03-20 The Procter & Gamble Company Produit de consommation

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DE102016219858A1 (de) 2018-04-12

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