EP1732767A1 - Scellement d'inscriptions plastiques - Google Patents

Scellement d'inscriptions plastiques

Info

Publication number
EP1732767A1
EP1732767A1 EP05715991A EP05715991A EP1732767A1 EP 1732767 A1 EP1732767 A1 EP 1732767A1 EP 05715991 A EP05715991 A EP 05715991A EP 05715991 A EP05715991 A EP 05715991A EP 1732767 A1 EP1732767 A1 EP 1732767A1
Authority
EP
European Patent Office
Prior art keywords
layer
labeling
marking
laser
sealing
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP05715991A
Other languages
German (de)
English (en)
Spanish (es)
Inventor
Sylke Klein
Tanja Sandner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Merck Patent GmbH
Original Assignee
Merck Patent 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
Priority claimed from DE200410016037 external-priority patent/DE102004016037A1/de
Priority claimed from DE200410026335 external-priority patent/DE102004026335A1/de
Application filed by Merck Patent GmbH filed Critical Merck Patent GmbH
Publication of EP1732767A1 publication Critical patent/EP1732767A1/fr
Withdrawn legal-status Critical Current

Links

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
    • 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
    • B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D125/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Coating compositions based on derivatives of such polymers
    • C09D125/02—Homopolymers or copolymers of hydrocarbons
    • C09D125/04—Homopolymers or copolymers of styrene
    • C09D125/06—Polystyrene
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
    • C09D133/04—Homopolymers or copolymers of esters
    • C09D133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
    • C09D133/10—Homopolymers or copolymers of methacrylic acid esters
    • C09D133/12—Homopolymers or copolymers of methyl methacrylate
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
    • Y10T428/24851—Intermediate layer is discontinuous or differential

Definitions

  • the present invention relates to the sealing of plastic inscriptions, which have been generated by means of lasers on the plastic surface, preferably indirectly. 5 With the help of laser beams of different wavelengths, it is possible to permanently mark and label materials and production goods.
  • Cold laser marking means the marking of plastics 15 using all colored and achromatic pigments or dyes (all colors including black, white and all shades of gray).
  • the markings and / or inscriptions are made by the action of laser energy 0 1. on the material itself (direct inscription) or 2. on an inscription medium that is transferred from the outside to the material to be inscribed (indirect inscription). 5
  • inscription method 1 metals react to laser irradiation with different tempering colors, woods become dark at the irradiated areas (charring) and plastics, e.g. PVC, depending on the color of the plastic, show light or dark discolorations (foaming, carbonization).
  • labeling method 2 hits a laser beam of suitable energy and wavelength (e.g. IR laser) with a labeling medium and if it is in contact with the material to be labeled, this will be
  • Labeling medium Transfer the labeling medium to the material and fix it there.
  • Materials can be labeled indirectly with suitable colored and achromatic pigment or dye mixtures, suspensions, pastes or laser foils or tapes. In this way, colored and black / white lettering with high contrast is possible.
  • the amount of laser-sensitive pigments actually required for labeling is considerably less than e.g. with masterbatch addition (labeling method 1) or is not required in certain applications.
  • Labeling media made of glass frits or glass frit precursors with laser energy absorbers, which - depending on the desired color - are mixed with inorganic and organic pigments, metal oxides, organometallic substances or metal powders, are generally known to the person skilled in the art. Such methods are e.g. described in WO 99/16625, U.S. 6,238,847, U.S. 6,313,436 and WO 99/25562.
  • the required laser energy (1-30 W output power irradiated and labeled in cw mode) or laser energy density (in pulsed mode 100 W / cm 2 - 3 GW / cm 2 ).
  • carrier substrates such as tapes, foils or the like
  • the required laser energy (1-30 W output power irradiated and labeled in cw mode) or laser energy density (in pulsed mode 100 W / cm 2 - 3 GW / cm 2 ).
  • glass, ceramics, metal, stone, plastics and composites can be labeled.
  • Such labeling methods are known for example from WO 03/035411, WO 03/080334 and WO 03/080335.
  • a major disadvantage of the indirect laser inscription of plastics produced in these processes is the locally very high pigment or dye concentration at the inscription locations, which often leads to smeared, blurred inscriptions, which can also bloom or bleed out later. This occurs especially when using organic pigments or dyes.
  • Pigment concentrations of> 0.5% for organic pigments and> 2% for inorganic pigments the pigment concentrations are due to e.g. according to WO 99/16625 laser-inscribed plastic areas well over 20%.
  • This overpigmentation leads - depending on the inscribed plastic and the later usage temperature - to the migration of the pigments or dyes to the plastic surface, to the so-called blooming.
  • This overpigmentation makes additional post-cleaning and drying steps necessary, which is technologically undesirable or unacceptable, in particular for an inline production process with product labeling as the last process step.
  • the lettering bleeds or fades when in use or fades, for example due to environmental influences, etc.
  • the object of the present invention is therefore to achieve non-blooming, non-bleeding laser marking of plastics with high edge sharpness and high resistance to environmental influences, the laser marking being generated on the plastic surface, preferably indirectly.
  • the invention relates to a method for the permanent and abrasion-resistant colored labeling of plastics, characterized in that the bleeding or blooming of the colorants and / or absorbers (laser-sensitive pigments) at the labeled points in the plastic is prevented by using a Laser's inscribed areas are sealed with a transparent polymer during the inscription process itself or immediately afterwards.
  • the method according to the invention is distinguished by the following features:
  • the polymer layer for the seal can be applied in a 1-step process together with the laser inscription or in a 2-step process on the inscription made in the 1st step. Layer systems according to Figs. 1-12 have proven to be particularly suitable.
  • the plastic is preferably inscribed with a laser by indirect inscription, for example as described in WO 99/16625 or in the unpublished DE 10352857.
  • the plastics are labeled in color by introducing the labeling medium into the plastic substrate using laser energy.
  • the labeling medium detaches from the carrier film and then bonds permanently to the likewise heated and thus locally softened plastic surface.
  • the layer system consists of a laser light-permeable and durable carrier layer (1), a laser-sensitive energy absorber layer (2), a separating layer (3), a separate sealing layer (4) and finally a labeling medium (5), the latter containing pigments and /or
  • This layer system is brought into close contact with the plastic to be labeled with the labeling medium side.
  • the colorant itself can be coated with a sealing polymer layer or embedded in a polymer matrix (6) (Fig. 2, 4, 6).
  • the labeling of a plastic with the seal is created in this 1-step process.
  • the energy required for this is transferred via the energy absorber layer (2, 7) to the separating layer (3), which softens and thus the sealing layer (4) and the labeling medium (5) or that sealed colorant (6) transfers to the plastic.
  • the laser energy must be selected so that the plastic at the labeling points also softens and a firm connection with the sealing layer (4) or with the sealed color center! (6) forms.
  • Plastics e.g. dark colored plastics, good affinity of the plastic for the sealing polymer
  • Fig. 5, 6 additional absorbers
  • the labeling process is separated from the subsequent seal.
  • the label is created. This can be done with layered structures as shown in Fig. 7 to 10.
  • the energy absorber is applied as a separate layer (2) (Fig. 7) to a laser-light-permeable and durable carrier film (1), applied or incorporated into the carrier film (7) (Fig. 8) or is not required for self-absorbing plastics (Fig. 9), the labeling medium (5) as a separate layer (Fig. 7-9) or as a layer (8) consisting of a mixture of labeling medium (5) and energy absorber (2) (Fig. 10).
  • the necessary energy is transferred via the energy absorber layer (2, 7) to the labeling medium (5) and to the plastic, or is immediately transferred to the plastic via the layer (8).
  • the labeling medium (5) merges with the softened plastic and leads to the plastic being labeled.
  • the seal is made with a layer structure (Fig. 11, 12) consisting of a laser-light-permeable and durable carrier layer (1), a laser-sensitive energy absorber layer (2 or incorporated in 7), a separating layer (3) and a sealing layer ( 4) generated.
  • a suitable laser the necessary energy is transferred via the energy absorber layer (2, 7) to the separating layer (3), which softens and thus transfers the sealing layer (4) to the plastic.
  • the laser energy must be selected so that the plastic softens again at the labeling points and forms a firm connection with the sealing layer.
  • All materials which are ideally transparent and / or translucent in the specified wavelength range for the laser light and which are not damaged or destroyed by the interaction with the laser light are suitable as materials for the carrier layer (1).
  • Materials such as Glass and plastics, which are ideally used in the form of foils, tapes or plates and preferably have layer thicknesses of 5-250 ⁇ m, in particular 10-150 ⁇ m and very particularly preferably 15-75 ⁇ m.
  • Suitable plastics are preferably thermoplastics.
  • the plastics consist of polyesters, polycarbonates, polyimides, polyacetals, polyethylene, polypropylene, polyamides, polyester esters, polyether esters, polyphenylene ethers, polybutylene terephthalate, polyethylene terephthalate, polymethyl methacrylate, polyvinyl acetal, polyvinyl chloride, polystyrene, acrylonitrile butadiene styrene (ABS) Styrene acrylic esters (ASA), polyether sulfones and polyether ketones and their copolymers and / or mixture.
  • ABS acrylonitrile butadiene styrene
  • ASA Styrene acrylic esters
  • polyester polyethylene terephthalate
  • polyethylene polyethylene
  • polypropylene polypropylene
  • polycarbonates polycarbonates and polyimides are particularly preferred.
  • Plastic parts or surfaces are suitable for unstretched amorphous plastic carrier films made of polyethylene terephthalate, polyester and polyamide. All materials can be used as energy absorbers that sufficiently absorb the laser light energy in the specified wavelength range and convert it into thermal energy.
  • the energy absorbers suitable for the marking are preferably based on carbon, soot, anthracene, IR-absorbing colorants such as perylene / rylene, pentaerythritol, phosphates such as copper hydroxide phosphates, sulfides such as molybdenum disulfide, oxides such as antimony (III) oxide , Fe 2 0 3 and Ti0 2l bismuth oxychloride , platelet-shaped, in particular transparent or semi -transparent substrates made of, for example, layered silicates, such as synthetic or natural mica, talc, kaolin, glass platelets, Si0 2 platelets or synthetic carrier-free platelets.
  • Platelet-shaped metal oxides such as platelet-shaped iron oxide, aluminum oxide, titanium dioxide, silicon dioxide, LCP's (Liquid Crystal Polymers), holographic pigments, conductive pigments or coated graphite platelets are also suitable.
  • Metal powders which can be uncoated or also covered with one or more metal oxide layers can also be used as platelet-shaped pigments; preferred are e.g. Al, Cu, Cr, Fe, Au, Ag and steel plates. If corrosion-prone metal plates such as Al, Fe or steel plates are used uncoated, they are preferably covered with a protective polymer layer.
  • spherical pigments can also be used, e.g. made of AI, Cu, Cr, Fe, Au, Ag and / or Fe.
  • Particularly preferred substrates are mica flakes coated with one or more metal oxides.
  • Colorless, highly refractive metal oxides such as, in particular, titanium dioxide, antimony (III) oxide, zinc oxide, tin oxide and / or zirconium dioxide, and colored metal oxides, such as, for example, chromium oxide, nickel oxide, copper oxide, cobalt oxide and in particular iron oxide (Fe 2 0 3 , Fe 3 0).
  • Antimony (III) oxide is particularly preferably used alone or in combination with tin oxide as the energy absorber.
  • These substrates are known and are mostly commercially available, eg under the trademark Iriodin ® Lazerflair from. Merck KGaA, and / or can be prepared by standard methods known to the skilled person.
  • Pigments based on transparent or semi-transparent platelet-shaped substrates are e.g. described in German patents and patent applications 14 67 468, 19 59 998, 20 09 566, 22 14 454, 22 15 191, 2244298, 23 13 331, 25 22 572, 31 37 808, 31 37 809, 31 51 343, 31 51 354, 31 51 355, 32 11 602, 32 35 017, 38 42 330, 44 41 223.
  • Coated Si0 2 platelets are known, for example, from WO 93/08237 (wet chemical coating) and DE-OS 196 14 637 (CVD process).
  • Multilayer pigments based on phyllosilicates are known, for example, from German published documents DE 196 18 569, DE 196 38 708, DE 197 07 806 and DE 198 03 550. Multi-layer pigments which have the following structure are particularly suitable:
  • mice + Ti0 2 + Si0 2 + Ti0 2 / Fe 2 0 3
  • Mica + Ti0 2 + Si0 2 + (Sn, Sb) 0 2 Si0 2 platelets + Ti0 2 + Si0 2 + Ti0 2
  • Anthracene perylene / rylene, for example ter- or quarter-rylenetetracarboxydimides, pentaerythritol, copper hydroxide phosphates, molybdenum disulfide, antimony (III) oxide, bismuth oxychloride, carbon, carbon black, antimony, Sn (Sb) 0 2 , Ti0 2 , silicates, Si0 2 platelets, mica coated with metal oxides and / or Si0 2 platelets, conductive pigments, sulfides, phosphates, BiOCI, or mixtures thereof.
  • the energy absorber can also be a mixture of two or more components. According to the invention, it is applied as a layer (2) on the Carrier (1) pulled on (Fig. 1, 2, 5, 8) or incorporated into the carrier layer (Fig. 3, 4, 6, 9), in proportions of 2 - 50% by weight.
  • the labeling medium (5) can be applied as a paste or as a layer with a support.
  • the labeling medium essentially consists of colorant, binder and optionally polymer component, preferably in dissolved form or in the form of particles and additives.
  • Colorants can also be a mixture of two or more substances.
  • the proportion of colorants in the labeling medium is preferably 0.1-30% by weight, in particular 0.2-20% by weight and very particularly preferably 0.5-10% by weight, based on the total mass of the labeling medium (colorant + binder + solvent + if necessary polymer component).
  • Azo pigments and dyes such as e.g. Mono-, diazo pigments and dyes, polycyclic pigments and dyes such as e.g. Perinones, perylenes, anthraquinones, flavanthrones, isoindolinones, pyranthrones, anthrapyrimidines, quinacridones, thioindigo, dioxazines, indanthronones, diketo-pyrolo-pyrroles, quinone phthalones, metal-complexing pigments and dyes such as e.g. Phthalocyanines, azo, azomethine, dioxime,
  • Isoindolinone complexes metal pigments, oxide and oxide hydroxide pigments, oxide mixed phase pigments, metal salt pigments, such as chromate, chromate-molybdate mixed phase pigments, carbonate pigments, sulfide and sulfide selenium pigments, complex salt pigments and silicate pigments.
  • Sulphide-selenium pigments carbonate pigments, chromate, chromate-molybdate mixed phase pigments, complex salt pigments and silicate pigments.
  • the colorant / absorber ratio for the 2-step process is preferably 10: 1- 1:10, in particular 5: 1 - 1: 5, very particularly preferably 4: 1 - 1: 4.
  • a polymer component can be added to the labeling medium to improve adhesion. It preferably consists of low melting point polymers such as e.g. Polyesters, polycarbonates, polyolefins, polystyrene, polyvinyl chloride, polyimides, polyamides, polyacetals and copolymers made from the polymers mentioned, and terpolymers made from vinyl chloride, dicarboxylic acid esters and vinyl acetate or hydroxyl, methacrylate or mixtures thereof.
  • the polymer component can be dissolved or undissolved in the labeling medium as a fine powder.
  • the particle sizes are preferably 10 nm-100 ⁇ m, in particular 100 nm-50 ⁇ m and very particularly preferably 500 nm-5 ⁇ m.
  • a mixture of different polymer particles can also be used, whereby both the particle sizes and the chemical composition can differ.
  • the labeling medium preferably contains 10-50% by weight. in particular 15-40% by weight, and very particularly preferably 20-35% by weight, of polymers based on the total mass of the color paste with colorant + binder + solvent + polymer component.
  • the ratio of polymer component / colorant is preferably 200: 1-1: 1, in particular 100: 1-2: 1, very particularly preferably 70: 1-3: 1.
  • the labeling medium contains a binder as a further component.
  • the binder enables the inscription layer to be applied homogeneously to materials such as glass and plastics, which are ideally in the form of foils, tapes or plates.
  • binders known to the person skilled in the art are suitable, in particular cellulose, cellulose derivatives, such as e.g. Cellulose nitrate, cellulose acetate, hydrolyzed / acetalized polyvinyl alcohols, polyvinyl pyrrolidones, polyolefins, e.g. Polypropylenes and their derivatives, polyacrylates as well as copolymers of ethylene / ethylene acrylate, polyvinyl butyrals, epoxy resins, polyesters, polyisobutylene, polyamides.
  • cellulose cellulose derivatives
  • e.g. Cellulose nitrate e.g. Cellulose nitrate
  • cellulose acetate hydrolyzed / acetalized polyvinyl alcohols
  • polyvinyl pyrrolidones polyolefins
  • polyolefins e.g. Polypropylenes and their derivatives
  • polyacrylates as well as copolymers
  • any additives that are added enable the labeling medium (5) to come into close contact with the plastic when writing and create a firm connection between the labeling medium (5) and the seal (4).
  • the additives preferably consist of polymers and copolymers of polyvinyl acetates, methyl, ethyl, butyl methacrylates, unsaturated polyester resins or mixtures thereof.
  • the separating layer (3) is preferably formed from ester wax or polyvinyl alcohol.
  • the release layer must release the sealing layer from the tape easily and completely (without damage) when heated.
  • the sealing layer (4) can consist of polymers, preferably with glass transition temperatures> 90 ° C, in particular of polymers of styrene, methyl methacrylate or hydroxy-functional acrylates, PE waxes and dispersions, polyvinyl fluoride and nitrocellulose as binders.
  • the layer thicknesses of the multilayer systems are preferably: carrier layer (1, 7) 5-250 ⁇ m, preferably 15-75 ⁇ m energy absorber layer (2) 0.5-150 ⁇ m, preferably 1.0-120 ⁇ m separating layer (3) 0.1-1 ⁇ m, preferably 0.2-0.9 ⁇ m sealing layer (4) 1-10 ⁇ m, preferably 4-9 ⁇ m labeling layer (5, 6) 1- 150 ⁇ m, preferably 15-100 ⁇ m
  • Layer (8) of labeling medium and energy absorber 10-150 ⁇ m, preferably 15-100 ⁇ m
  • the layer thicknesses of the multilayer systems should not exceed a total thickness of 10-350 ⁇ m, preferably 10-250 ⁇ m and in particular 12-100 ⁇ m, since if the layer systems are too thick, they have a sharp edge
  • the multi-layer systems described are placed on the plastic and with the necessary contact pressure, e.g. mechanically, by means of vacuum or by means of optionally added heat-activatable additives in close contact with the areas to be labeled.
  • the lettering is done with a suitable laser in the beam deflection process or mask process.
  • the laser inscription is such that the sample body is brought into the beam path of a laser, preferably an Nd: YAG or Nd: YV0 laser. Labeling with an excimer laser, e.g. possible using a mask technique. However, the desired results can also be achieved with other conventional laser types which have a wavelength in a high absorption range of the laser light-absorbing substance used.
  • the marking obtained is determined by the irradiation time (or the number of pulses in the case of pulse lasers) and the irradiation power of the laser and of the plastic system used. The power of the lasers used depends on the respective application and can be easily determined by a specialist in individual cases.
  • the laser used generally has a wavelength in the range from 157 nm to 10.6 ⁇ m, preferably in the range from 532 nm to 10.6 ⁇ m.
  • a wavelength in the range from 157 nm to 10.6 ⁇ m, preferably in the range from 532 nm to 10.6 ⁇ m.
  • CO 2 lasers (10.6 ⁇ m)
  • the excimer lasers have the following wavelengths: F 2 excimer laser (157 nm), ArF excimer laser (193 nm), KrCI excimer laser (222 nm), KrF excimer laser (248 nm), XeCI excimer laser (308 nm ), XeF excimer laser (351 nm), frequency-multiplied
  • Nd YAG laser with wavelengths of 355 nm (frequency tripled) or 265 nm (frequency quadrupled).
  • Nd YAG lasers (1064 or 532 nm) and CO 2 lasers are particularly preferably used.
  • the energy densities of the lasers used are generally in the range from 0.3 mJ / cm 2 to 50 J / cm 2 , preferably 0.3 mJ / cm 2 to 10 J / cm 2 .
  • Nd YAG laser, Nd-V0 4 or C0 2 laser in different laser wavelengths, 1064 nm, 532 nm or 808-980 nm, is preferably used for the inscription. Marking is possible both in continuous cw mode (continuous wave) and in pulse mode.
  • the suitable power spectrum of the marking laser comprises 2 to 100 watts, the pulse frequency is preferably in the range of 1 to 100 Hz.
  • plastics according to the invention can be used wherever plastics have previously been inscribed using printing, embossing or engraving processes or wherever no or no color-fast and permanent inscription / marking or only inscription / marking using laser-sensitive materials Pigments in the plastic itself was possible.
  • linear or thermolabile cross-linked plastics e.g. Polyolefins, vinyl polymers, polyamides, polyesters, polyacetals, polycarbonates, partly also polyurethanes and ionomers.
  • the advantages of the type of labeling according to the invention are color fastness, permanence and flexibility / individuality, i.e. Labeling can be done without a mask, cliché or stamp specification.
  • Plastics of any kind and shape e.g. • in the packaging industry (batch number, shelf life, manufacturing data, information)
  • the invention also relates to plastics which have been marked or labeled in color by the process according to the invention and whose marking has been sealed.
  • the individual layer systems are applied with a squeegee or an engraving roller in gravure printing or with screen printing to the polyester carrier film or the previous layer and dried.
  • Example 3 Production of an energy absorber layer (7)
  • polyethylene, polypropylene, PET flat films or composites are preferably extruded or blown from these, which have an effective energy absorber content, e.g. contain a soot content of 1 - 10%.
  • the PE wax is dissolved in toluene and stirred well.
  • Example 5 Preparation of a sealing layer (4) 8.0 g of methyl ethyl ketone 4.6 g of toluene 2.0 g of cyclohexanone 3.9 g PMMA (T g : 122 ° C) (Degussa) 1.5 g PE wax
  • the PE wax and PMMA are dissolved in the solvent mixture and homogenized with a dissolver.
  • Example 6 Preparation of a sealing layer (4) 8.0 g xylene 4.0 g polystyrene 2.0 g PE wax
  • the PE wax and polystyrene are dissolved in xylene and homogenized with a dissolver.
  • Example 7 Production of a sealing layer (4)
  • Ethyl cellulose, polystyrene and UV stabilizer are dissolved in n-butyl acetate and homogenized with a dissolver.
  • Example 8 Production of a writing medium containing Poivmer (5)
  • the paste is e.g. mounted on a squeegee on polyester films and dried.
  • Example 9 Production of a writing medium containing Poivmer (5)
  • Titanium dioxide is used as the colorant.
  • Example 10 Production of a writing medium containing Poivmer (5)
  • Example 11 Production of a layer (8) from labeling medium (5) and energy absorber (2)
  • Nd-YV0 4 20 W output power, Nd-YV0 4 , 10 W output power, 1064 nm, 100 kHz pulse frequency 1064 nm, 50 kHz pulse frequency
  • Nd-YV0 4 6 W output power
  • Nd YAG, 10 W output power
  • Example 13 Comparison of markings with and without sealing with regard to the influence on bleeding / efflorescence

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)
  • Laminated Bodies (AREA)

Abstract

L'invention concerne le scellement d'inscriptions plastiques qui sont produites, de préférence indirectement, au moyen d'un laser sur la surface en matière plastique.
EP05715991A 2004-03-30 2005-03-11 Scellement d'inscriptions plastiques Withdrawn EP1732767A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE200410016037 DE102004016037A1 (de) 2004-03-30 2004-03-30 Versiegelung von Kunststoffbeschriftungen
DE200410026335 DE102004026335A1 (de) 2004-05-26 2004-05-26 Versiegelung von Kunststoffbeschriftungen
PCT/EP2005/002634 WO2005097514A1 (fr) 2004-03-30 2005-03-11 Scellement d'inscriptions plastiques

Publications (1)

Publication Number Publication Date
EP1732767A1 true EP1732767A1 (fr) 2006-12-20

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP05715991A Withdrawn EP1732767A1 (fr) 2004-03-30 2005-03-11 Scellement d'inscriptions plastiques

Country Status (8)

Country Link
US (2) US20070154642A1 (fr)
EP (1) EP1732767A1 (fr)
JP (1) JP5296374B2 (fr)
KR (1) KR20060129515A (fr)
BR (1) BRPI0509290B8 (fr)
RU (1) RU2405678C2 (fr)
TW (1) TWI367168B (fr)
WO (1) WO2005097514A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2006317160A1 (en) * 2005-11-22 2007-05-31 Merck Patent Gmbh Process for a thermal transfer of a liquid crystal film using a transfer element
DE102006062269A1 (de) * 2006-12-22 2008-06-26 Eckart Gmbh & Co. Kg Verwendung von sphärischen Metallpartikeln als Lasermarkierungs- oder Laserschweißbarkeitsmittel sowie lasermarkierbarer und/oder laserschweißbarer Kunststoff
US9168696B2 (en) 2012-06-04 2015-10-27 Sabic Global Technologies B.V. Marked thermoplastic compositions, methods of making and articles comprising the same, and uses thereof
US20120213943A1 (en) * 2011-02-22 2012-08-23 Ferro Corporation Polymer laser marking
US8871424B2 (en) 2012-01-20 2014-10-28 Cryovac, Inc. Laser imageable polyolefin film
US9662833B2 (en) 2012-06-04 2017-05-30 Sabic Global Technologies B.V. Marked thermoplastic compositions, methods of making and articles comprising the same, and uses thereof
US9666763B2 (en) 2012-11-30 2017-05-30 Corning Incorporated Glass sealing with transparent materials having transient absorption properties
US9209443B2 (en) 2013-01-10 2015-12-08 Sabic Global Technologies B.V. Laser-perforated porous solid-state films and applications thereof
FR3001912B1 (fr) * 2013-02-14 2015-02-27 Sidel Participations "procede d'obtention d'un recipient marque comportant une etape de marquage d'une preforme"
CN105377783B (zh) 2013-05-10 2019-03-08 康宁股份有限公司 采用低熔融玻璃或薄吸收膜对透明玻璃片进行激光焊接
WO2015089105A1 (fr) 2013-12-09 2015-06-18 Respira Therapeutics, Inc. Formulations en poudre d'inhibiteur pde5 et procédés y associés
KR102512044B1 (ko) 2014-10-31 2023-03-20 코닝 인코포레이티드 레이저 용접 유리 패키지 및 그 제조 방법
JP6623626B2 (ja) * 2015-09-04 2019-12-25 オムロン株式会社 転写方法
US10854554B2 (en) 2018-01-23 2020-12-01 Ferro Corporation Carbide, nitride and silicide enhancers for laser absorption
US10723160B2 (en) 2018-01-23 2020-07-28 Ferro Corporation Carbide, nitride and silicide enhancers for laser absorption
WO2020165297A1 (fr) 2019-02-15 2020-08-20 Merck Patent Gmbh Procédé pour transférer des marquages de couleur sur des surfaces en matière plastique

Family Cites Families (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4654290A (en) * 1985-02-01 1987-03-31 Motorola, Inc. Laser markable molding compound, method of use and device therefrom
DE3517275A1 (de) * 1985-05-14 1986-11-20 Bayer Ag, 5090 Leverkusen Verfahren zur beschriftung von kunststoffen
US4961077A (en) * 1988-02-19 1990-10-02 E. I. Du Pont De Nemours And Company Method for affixing information on read-only optical discs
CH677756A5 (fr) * 1989-01-26 1991-06-28 Ciba Geigy Ag
US5215864A (en) * 1990-09-28 1993-06-01 Laser Color Marking, Incorporated Method and apparatus for multi-color laser engraving
EP0605803A1 (fr) * 1992-12-12 1994-07-13 Hoechst Aktiengesellschaft Marquage en couleurs des surfaces en plastique par laser
DE69616254T2 (de) * 1995-12-27 2002-07-04 Agfa Gevaert Nv Farbphotographisches Silberhalogenidfilmelement mit einem thermoplastischen Träger, der mit einem Laser markiert werden kann
DE19630478A1 (de) * 1996-07-27 1998-01-29 Quarzwerke Gmbh Verfahren zur Laserbeschriftung von Folien
US6127199A (en) * 1996-11-12 2000-10-03 Seiko Epson Corporation Manufacturing method of active matrix substrate, active matrix substrate and liquid crystal display device
WO1998028365A1 (fr) * 1996-12-20 1998-07-02 Dsm N.V. Composition polymere
US5829353A (en) * 1997-06-18 1998-11-03 Presstek, Inc. Method of modulating lithographic affinity and printing members made thereby
US6238847B1 (en) * 1997-10-16 2001-05-29 Dmc Degussa Metals Catalysts Cerdec Ag Laser marking method and apparatus
JPH11198532A (ja) * 1998-01-07 1999-07-27 Konica Corp 画像形成方法及び画像記録体
JPH11227341A (ja) * 1998-02-18 1999-08-24 Kao Corp 熱転写記録媒体
AU5871500A (en) * 1999-06-11 2001-01-02 Sydney Hyman Image making medium
DE19942316A1 (de) * 1999-09-04 2001-03-08 Poesl Rudolf Verfahren zum Beschriften von Kunststoff usw.
JP2001232956A (ja) * 2000-02-24 2001-08-28 Dainippon Printing Co Ltd 転写可能な記録媒体
JP2001322359A (ja) * 2000-05-17 2001-11-20 Dainippon Printing Co Ltd 熱転写シート
DE10039367A1 (de) * 2000-08-11 2002-02-21 Mitsubishi Polyester Film Gmbh Biaxial orientierte Polyesterfolie mit hoher Sauerstoffbarriere, Verfahren zu ihrer Herstellung und ihre Verwendung
DE10136479A1 (de) * 2001-07-27 2003-02-06 Merck Patent Gmbh Farbige Beschriftung und Markierung von Kunststoffen und Lacken
US20050035590A1 (en) * 2003-05-16 2005-02-17 Jones Robert L. Identification document usable with D2T2 printing
EP1364798A1 (fr) * 2002-05-22 2003-11-26 Agfa-Gevaert Appareil de marquage laser
JP4170688B2 (ja) * 2002-07-09 2008-10-22 大日本印刷株式会社 熱転写型画像保護シート及びそれによって得られる記録物
US20070080146A1 (en) * 2003-11-10 2007-04-12 Werner Stockum Coloured laser marking
KR100590853B1 (ko) * 2004-03-12 2006-06-19 오리엔트 가가쿠 고교 가부시키가이샤 레이저광 투과성 조성물 및 레이저 용착 방법

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2005097514A1 *

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TW200609123A (en) 2006-03-16
US20110117335A1 (en) 2011-05-19
BRPI0509290B1 (pt) 2013-01-08
WO2005097514A1 (fr) 2005-10-20
RU2006138147A (ru) 2008-05-10
US8343412B2 (en) 2013-01-01
KR20060129515A (ko) 2006-12-15
US20070154642A1 (en) 2007-07-05
BRPI0509290A (pt) 2007-09-18
RU2405678C2 (ru) 2010-12-10
TWI367168B (en) 2012-07-01
JP2007530321A (ja) 2007-11-01
BRPI0509290B8 (pt) 2013-02-19
JP5296374B2 (ja) 2013-09-25

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