EP1488935B1 - Manufacturing process for a security element - Google Patents

Manufacturing process for a security element Download PDF

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Publication number
EP1488935B1
EP1488935B1 EP04013942.0A EP04013942A EP1488935B1 EP 1488935 B1 EP1488935 B1 EP 1488935B1 EP 04013942 A EP04013942 A EP 04013942A EP 1488935 B1 EP1488935 B1 EP 1488935B1
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EP
European Patent Office
Prior art keywords
process according
magnetic
film material
layer
layers
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Not-in-force
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EP04013942.0A
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German (de)
French (fr)
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EP1488935A2 (en
EP1488935A3 (en
Inventor
Matthias Müller
Peter Reich
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Hueck Folien GmbH
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Hueck Folien GmbH
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Publication of EP1488935A3 publication Critical patent/EP1488935A3/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
    • B42D25/29—Securities; Bank notes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/355—Security threads

Definitions

  • the invention relates to a method for the production of a film material for data carriers, documents of value and packaging, which has a spatially resolved magnetic coding.
  • a security document comprising a security element in the form of a thread or ribbon of transparent plastic material comprising a metallic layer with recesses in the shape of characters or patterns is provided, above or below this metal layer being arranged another magnetic layer such that at least the readable recesses remain free.
  • the object of the present invention was to provide a method for the production of a film material with magnetic coding, in which a defined magnetic coding can be detected spatially resolved.
  • the invention therefore relates to a method for producing a film material with magnetic coding, comprising a flexible carrier substrate, wherein a magnetpigment Vietnamese or a metallic magnetic ink is printed by means of a laser-coated cylinder or a printing plate on the carrier substrate such that the magnetic code simultaneously with recesses in shape of patterns, characters, letters, geometric figures, lines and guilloches by thickness modulation of the magnetic layer is generated, characterized in that the magnetic pigment-containing or a metallic magnetic ink is printed by means of a laser-coated cylinder or a printing plate with surface and depth-variable structures.
  • a security feature can be produced in a simple manner in the desired appearance and with the desired defined magnetic spatially resolved coding according to the invention.
  • carrier foils are preferably flexible plastic foils, for example of PI, PP, MOPP, PE, PPS, PEEK, PEK, PEI, PSU, PAEK, LCP, PEN, PBT, PET, PA, PC, COC, POM, as carrier substrate for a security feature.
  • ABS PVC in question.
  • the carrier films preferably have a thickness of 5 to 700 .mu.m, preferably 5 to 200 .mu.m, particularly preferably 5 to 50 .mu.m.
  • metal foils for example Al, Cu, Sn, Ni, Fe or stainless steel foils having a thickness of 5-200 ⁇ m, preferably 10 to 80 ⁇ m, particularly preferably 20-50 ⁇ m, may also serve as the carrier substrate.
  • the films can also be surface-treated, coated or laminated, for example, with plastics or painted.
  • carrier substrates also paper or composites with paper, for example, composites with plastics with a grammage 20-500 g / m 2, preferably 40-200 g / m 2. be used.
  • woven or nonwovens such as continuous fiber webs and staple fiber webs, which may optionally be needled or calendered, may be used as the carrier substrates.
  • fabrics or webs of plastics such as PP, PET, PA and PPS, but it can also be woven or nonwovens made of natural, optionally treated fibers, such as viscose fiber webs are used.
  • the fabrics or nonwovens used have a basis weight of about 20 g / m 2 up to 500 g / m 2 .
  • these fabrics or nonwovens may be surface treated.
  • the carrier substrate is printed with a paint or a paint having magnetic properties.
  • Magnetic colors capable of inducing high flux density magnetic fields or conducting high density magnetic fields are suitable for producing coded magnetic features in situ.
  • the measurable gradient of the magnetic flux is generated by thickness modulation of the magnetic layers.
  • Magnetic pigment paints with pigments based on Fe oxides, such as Fe 2 O 3 or Fe 3 O 4 , iron, nickel, cobalt and their alloys, cobalt / samarium, barium or cobalt ferrite, hard and soft magnetic iron. and steel grades in aqueous or solvent-containing dispersions.
  • Suitable solvents are, for example, i-propanol, ethyl acetate, methyl ethyl ketone, methoxypropanol, aliphatics or aromatics and mixtures thereof.
  • the pigments are incorporated in acrylate polymer dispersions having a molecular weight of from 150,000 to 300,000, in acrylate-urethane dispersions, acrylate-styrene or PVC-containing dispersions or in solvent-containing dispersions of this type.
  • Magnetic paints with pigments based on Cr / Ni steel, Al / Fe 3 O 4 and the like are particularly suitable. These magnetic colors, in contrast to the conventional magnetic colors, which appear black, brown or gray, have a silvery appearance and at the same time have the required magnetic properties described above. This makes it possible to produce the desired or required for many applications shiny metallic appearance in one operation already by printing these magnetic colors. Overprinting or coating with metallic or metal layers to produce the desired appearance is therefore not necessary, but can be done without problems, for example, to introduce further identification features.
  • the printing is preferably carried out by means of a laser-coated cylinder or a printing plate, preferably in the gravure printing method, wherein the printing tool (cylinder or printing plate) is designed so that the coded magnetic layer may be imaged simultaneously with the Signs, patterns, letters, geometric figures, lines and guilloches can be printed.
  • a cylinder blank suitable for gravure printing is provided with a copper layer at least 80 ⁇ m thick, for example in a known galvanic process, it being possible, depending on the material of the blank, for example aluminum and iron, to previously apply an adhesion promoter layer, for example of nickel.
  • the thickness of the copper layer is at least 80 .mu.m, usually 100-1500 .mu.m, preferably 250-500 .mu.m.
  • the cylinder blank is turned to the exact girth and then ground to the appropriate roughness.
  • the roughness value Ra is preferably 0.03-2.0, particularly preferably 0.05-1.5, in particular 0.06-1.2.
  • an engraving machine such as an engraving machine manufacturer Hell or Ohio on the side of a passport in a defined size, for example 5x5mm, thickness 0.2 mm.
  • the cylinder prepared in this way is coated with a commercially available photoresist, for example LD 100 from OHKA Kogyo Ltd.
  • the thickness of this coating is about 3 - 5 microns.
  • the cylinder is optionally provided with an overcoat with a layer thickness of 1-5 microns, for example with OC-40 of the above company or with an analogous commercially available composition.
  • the cylinder is exposed, for example with an Ar / Ne laser.
  • the reference point is determined on the laser with the aid of optics and a camera (CCD camera).
  • the parts required as a protective layer are exposed.
  • the laser beam has a tool width of 5 ⁇ m, which corresponds to a resolution of 40,000 points / mm 2 .
  • the exposed cylinder is developed, for example in a sodium carbonate solution (0.5% solution), this is usually followed by a cleaning process with water, after which the cylinder is dried
  • the exposed and developed cylinder is now etched to the first desired depth with a CuCl 2 solution, or the thickness of the copper layer on the surface is correspondingly reduced by means of a known galvanic process.
  • the first photoresist layer is removed, whereupon a new photoresist, as described above, is applied, a further exposure takes place and then the etching or the galvanic copper removal takes place to the desired second depth. In this way, different depths can be made on the cylinder or the printing tool.
  • the process described can be repeated until it is possible to encounter the primer layer.
  • first depth for example, depending on the desired structures and the desired magnetic coding 10-150 .mu.m, preferably 12-80 .mu.m, particularly preferably 50-60 .mu.m are conceivable for the second depth 10-150 .mu.m, preferably 12-80 .mu.m, more preferably 30-40 .mu.m conceivable.
  • the generation of the greatest depth or the lowest etching depth takes place in the first step.
  • ceramic cylinders or other metal cylinders with the surface and depth-variable surface according to the invention can also be produced analogously. Further, such structures can also be made using a stylus or raster as a modification of conventional techniques.
  • Such provided with a surface and depth variable surface pressure tool is used to produce the security feature of the invention.
  • the depth modulation results in signal modulation when printing a corresponding magnetic ink.
  • the magnetic ink is applied in different thickness and shape corresponding to the surface of the printing tool in one step on the carrier substrate.
  • the carrier substrate may already have functional or decorative layers, or further layers may be applied after the magnetically encoded layer has been applied.
  • the carrier substrates can also additionally have a lacquer or color layer, which can be unstructured or structured, for example embossed.
  • the lacquer layer can be, for example, a release-capable transfer lacquer layer, it can be crosslinked or crosslinkable by radiation, for example UV radiation, and scratch-resistant and / or antistatic be equipped.
  • Both aqueous and solid coating systems in particular lacquer systems based on polyester acrylate or epoxy acrylate rosin, acrylate, alkyd, melamine, PVA, PVC, isocyanate, urethane systems, conventional or reactive curing mixture or radiation-curing are suitable ) could be.
  • compositions in each case a wide variety of compositions can be used.
  • the composition of the individual layers may in particular vary according to their purpose, that is to say whether the individual layers serve exclusively for decorative purposes or should be a functional layer or whether the layer should be both a decoration layer and a functional layer.
  • These layers may be pigmented or unpigmented.
  • pigments it is possible to use all known pigments, such as, for example, titanium dioxide, zinc sulfide, kaolin, ITO, ATO, FTO, aluminum, chromium oxides and silicon oxides, and also colored pigments. In this case, solvent-based coating systems and systems without solvents can be used.
  • Suitable binders are various natural or synthetic binders.
  • optical properties of a further layer can be visualized by visible dyes or pigments, luminescent dyes or pigments which fluoresce or phosphoresce in the visible, in the UV region or in the IR region, effect pigments, such as liquid crystals, pearlescent, bronzes and / or Multilayer color change pigments and heat-sensitive colors or pigments influence. These are in all possible combinations used.
  • phosphorescent pigments can also be used alone or in combination with other dyes and / or pigments.
  • electrically conductive layers can also be present on the substrate, or subsequently applied, for example electrically conductive polymer layers or conductive paint or lacquer layers.
  • metal pigments for example, copper, aluminum, silver, gold, iron and chromium, metal alloys such as copper-zinc or copper-aluminum or amorphous or crystalline ceramic pigments such as ITO, ATO and FTO, and doped or non-doped semiconductors such as silicon, germanium or doped or non-doped polymeric semiconductors or ionic conductors such as amorphous or crystalline metal oxides or metal sulfides may also be used as additive.
  • polar or partially polar compounds such as surfactants, or nonpolar compounds such as silicone additives or hygroscopic or non-hygroscopic salts can be used or added to the paint for adjusting the electrical properties of the layer.
  • a full-surface or partial metal layer wherein the partial application can be effected by means of an etching process (application of a full-surface metal layer and subsequent partial removal by etching) or by means of a demetallization process.
  • a demetallization process preferably in a first step, a solvent-soluble color (optionally in the form of an inverse coding) is applied, then, optionally after activation of the carrier substrate by a plasma or Corona treatment, the metallic layer is applied, whereupon the soluble color layer is removed by treatment with a suitable solvent, including the metallization present in these areas.
  • an electrically conductive polymer layer can also be applied as the electrically conductive layer.
  • the electrically conductive polymers may be, for example, polyaniline or polyethylenedioxythiophene.
  • the magnetic ink used for example, carbon black or graphite, whereby a simultaneously magnetic and electrically lelable layer can be produced particularly advantageously in a defined coding by the method according to the invention.
  • additional surface relief structures for example diffraction gratings and holograms, may also be considered as additional security features, wherein these structures may optionally also be metallised or partially metallised.
  • UV-curable deep-drawable lacquer is applied for the time being. Subsequently, for example, a surface structure by molding a die in this paint, which is pre-cured at the time of molding to the gel point, prepared, whereupon the radiation-curable paint is completely cured after application of the surface structure.
  • UV-curable lacquer Due to the use of the UV-curable lacquer, layers which have been applied thereto after curing, and also an optionally introduced surface structure, are stable even under temperature load.
  • the radiation-curable lacquer can be, for example, a radiation-curable lacquer system based on a polyester, an epoxy or polyurethane system containing two or more different, known in the art photoinitiators that can initiate curing of the paint system to different degrees at different wavelengths.
  • one photoinitiator can be activated at a wavelength of 200 to 400 nm, the second photoinitiator then at a wavelength of 370 to 600 nm.
  • the region in which the second photoinitiator is excited should be in the transmission wavelength range of the carrier substrate used.
  • electron radiation can be used for the main curing (activation of the second photoinitiator) also electron radiation can be used.
  • a water-thinnable varnish can also be used. Preference is given to polyester-based paint systems.
  • the inventive security elements can be provided with a protective lacquer layer on one or both sides.
  • the protective lacquer may be pigmented or unpigmented, using as pigments all known pigments or dyes, for example TiO 2 , ZnS, kaolin, ATO, FTO, aluminum, chromium and silicon oxides or, for example, organic pigments such as pthalocyanine blue, i-indolid yellow and dioxazine violet can.
  • luminescent dyes or pigments which fluoresce or phosphoresce in the visible, in the UV range or in the IR range, effect pigments such as liquid crystals, pearlescent, bronzes and / or multilayer color change pigments and heat-sensitive inks or pigments can be added. These can be used in all possible combinations.
  • phosphorescent pigments can also be used alone or in combination with other dyes and / or pigments.
  • a security element may be provided with a hot or cold seal adhesive or a self-adhesive coating for application to the security document or a package to be protected.
  • the security elements if appropriate after appropriate assembly (for example, into threads, tapes, strips, patches or other formats), therefore, have security features in data carriers, in particular value documents such as identity cards, cards, banknotes or labels and seals, but also in packaging materials for sensitive goods, such as pharmaceuticals, food, cosmetics, data carriers and electronic components. Furthermore, the security elements can be applied to packaging materials for a wide variety of goods, such as films, paper, boxes and cartons.
  • a cylinder with a profile accordingly Fig. 1 produced.
  • a cylindrical blank of aluminum is applied to a 5 micron thick adhesive layer of nickel.
  • a 300 ⁇ m thick copper layer is electrodeposited.
  • the cylinder blank is turned to the exact extent and then ground to a roughness Ra of 0.09.
  • engraved on an engraving machine for example, a engraving machine of the type Hell or Ohio on the side of a passport (5 x 5 mm, thickness 0.2 mm).
  • the cylinder prepared in this way is coated with a 4 ⁇ m thick layer of the photoresist LD 100 from OHKA.
  • the cylinder is optionally provided with an overcoat with a layer thickness of 2 microns, (OC-40).
  • the exposure is carried out with an Ar / Ne laser with a tool width of 5 microns after fixing the reference point, whereupon the exposed cylinder is developed in a 0.5% sodium carbonate solution.
  • the exposed and developed cylinder is now etched to the first desired depth with a CuCl 2 solution, in which case the greatest depth is begun.
  • the depth of the etching is 150 ⁇ m.
  • the first photoresist layer is removed, whereupon a new photoresist is applied as described above, a further exposure takes place and then the etching is carried out to a depth of 80 ⁇ m.
  • an etch depth of 40 microns is selected after removal of the photoresist layer, application of a new photoresist layer, exposure, and development.
  • the coercive force was 90 Oerstedt, the flux density 200 - 600 nW / m, modulated
  • etching process can be started either with the greatest depth or the lowest depth.
  • the following etching depths were provided: 120 ⁇ m, 70 ⁇ m and 10 ⁇ m.
  • a magnetic pigment color with 20% Fe 2 O 3 pigments in nitrocellulose is applied to a polypropylene film having a thickness of 5 ⁇ m.
  • the coercive force was 250 Oerstedt, the flux density 100 - 400 nW / m, modulated.

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  • Business, Economics & Management (AREA)
  • Accounting & Taxation (AREA)
  • Finance (AREA)
  • Laminated Bodies (AREA)
  • Burglar Alarm Systems (AREA)
  • Hard Magnetic Materials (AREA)
  • Paints Or Removers (AREA)

Description

Die Erfindung betrifft ein Verfahren zur Hestellung eines Folienmaterials für Datenträger, Wertdokumente und Verpackungen, das eine räumlich aufgelöste magnetische Codierung aufweist.The invention relates to a method for the production of a film material for data carriers, documents of value and packaging, which has a spatially resolved magnetic coding.

Aus der EP 0 516 790 B1 ist ein Sicherheitsdokument mit einem Sicherheitselement in Form eines Fadens oder Bandes aus transparentem Kunststoffmaterial bekannt, das eine metallische Schicht mit Aussparungen in Form von Zeichen oder Mustern aufweist, wobei über oder unter dieser Metallschicht eine weitere magnetische Schicht derart angeordnet ist, dass wenigstens die lesbaren Aussparungen frei bleiben.From the EP 0 516 790 B1 For example, a security document comprising a security element in the form of a thread or ribbon of transparent plastic material comprising a metallic layer with recesses in the shape of characters or patterns is provided, above or below this metal layer being arranged another magnetic layer such that at least the readable recesses remain free.

Aus der EP 0 310 707 B1 ist ein Dokument mit magnetisch detektierbaren Sicherheitsmerkmalen bekannt, die Bereiche mit variierbarer Magnetfeldstärke aufweisen.From the EP 0 310 707 B1 is a document with magnetically detectable security features known having areas with variable magnetic field strength.

Aufgabe der vorliegenden Erfindung war es ein Verfahren zur Hestellung eines Folienmaterials mit magnetischer Codierung bereitzustellen, bei dem eine definierte magnetische Codierung räumlich aufgelöst detektiert werden kann.The object of the present invention was to provide a method for the production of a film material with magnetic coding, in which a defined magnetic coding can be detected spatially resolved.

Gegenstand der Erfindung ist daher ein Verfahren zur Herstellung eines Folienmaterials mit magnetischer Codierung, aufweisend ein flexibles Trägersubstrat, wobei eine magnetpigmenthaltige oder eine metallische magnetische Druckfarbe mittels eines laserbelichteten Zylinders oder einer Druckplatte derart auf das Trägersubstrat verdruckt wird, dass der Magnetcode gleichzeitig mit Aussparungen in Form von Mustern, Zeichen, Buchstaben, geometrischen Figuren, Linien und Guillochen durch Dickenmodulation der magnetischen Schicht erzeugt wird, dadurch gekennzeichnet, dass die magnetpigmenthaltige oder eine metallische magnetische Druckfarbe mittels eines laserbelichteten Zylinders oder einer Druckplatte mit flächen- und tiefenvariablen Strukturen verdruckt wird.The invention therefore relates to a method for producing a film material with magnetic coding, comprising a flexible carrier substrate, wherein a magnetpigmenthaltige or a metallic magnetic ink is printed by means of a laser-coated cylinder or a printing plate on the carrier substrate such that the magnetic code simultaneously with recesses in shape of patterns, characters, letters, geometric figures, lines and guilloches by thickness modulation of the magnetic layer is generated, characterized in that the magnetic pigment-containing or a metallic magnetic ink is printed by means of a laser-coated cylinder or a printing plate with surface and depth-variable structures.

Ein Sicherheitsmerkmal ist auf einfache Weise in der gewünschten Erscheinungsform und mit der gewünschten definierten magnetischen räumlich aufgelösten Codierung erfindungsgemäß herstellbar.A security feature can be produced in a simple manner in the desired appearance and with the desired defined magnetic spatially resolved coding according to the invention.

Als Trägersubstrat für ein Sicherheitsmerkmal kommen beispielsweise Trägerfolien vorzugsweise flexible Kunststofffolien, beispielsweise aus PI, PP, MOPP, PE, PPS, PEEK, PEK, PEI, PSU, PAEK, LCP, PEN, PBT, PET, PA, PC, COC, POM, ABS, PVC in Frage. Die Trägerfolien weisen vorzugsweise eine Dicke von 5 - 700 µm, bevorzugt 5 - 200 µm, besonders bevorzugt 5 - 50 µm auf.
Ferner können als Trägersubstrat auch Metallfolien, beispielsweise AI-, Cu-, Sn-, Ni-, Fe- oder Edelstahlfolien mit einer Dicke von 5 - 200 µm, vorzugsweise 10 bis 80 µm, besonders bevorzugt 20 - 50 µm dienen. Die Folien können auch oberflächenbehandelt, beschichtet oder kaschiert beispielsweise mit Kunststoffen oder lackiert sein.
Ferner können als Trägersubstrate auch Papier oder Verbunde mit Papier, beispielsweise Verbunde mit Kunststoffen mit einem Flächengewicht von 20 - 500 g/m2, vorzugsweise 40 - 200 g/m2. verwendet werden.For example, carrier foils are preferably flexible plastic foils, for example of PI, PP, MOPP, PE, PPS, PEEK, PEK, PEI, PSU, PAEK, LCP, PEN, PBT, PET, PA, PC, COC, POM, as carrier substrate for a security feature. ABS, PVC in question. The carrier films preferably have a thickness of 5 to 700 .mu.m, preferably 5 to 200 .mu.m, particularly preferably 5 to 50 .mu.m.
Furthermore, metal foils, for example Al, Cu, Sn, Ni, Fe or stainless steel foils having a thickness of 5-200 μm, preferably 10 to 80 μm, particularly preferably 20-50 μm, may also serve as the carrier substrate. The films can also be surface-treated, coated or laminated, for example, with plastics or painted.
Further, as carrier substrates also paper or composites with paper, for example, composites with plastics with a grammage 20-500 g / m 2, preferably 40-200 g / m 2. be used.

Ferner können als Trägersubstrate Gewebe oder Vliese, wie Endlosfaservliese und Stapelfaservliese, die gegebenenfalls vernadelt oder kalandriert sein können, verwendet werden. Vorzugsweise bestehen solche Gewebe oder Vliese aus Kunststoffen, wie PP, PET, PA und PPS, es können aber auch Gewebe oder Vliese aus natürlichen, gegebenenfalls behandelten Fasern, wie Viskosefaservliese eingesetzt werden. Die eingesetzten Gewebe oder Vliese weisen ein Flächengewicht von etwa 20 g/m2 bis 500 g/m2 auf. Gegebenenfalls können diese Gewebe oder Vliese oberflächenbehandelt sein.Furthermore, woven or nonwovens, such as continuous fiber webs and staple fiber webs, which may optionally be needled or calendered, may be used as the carrier substrates. Preferably such fabrics or webs of plastics, such as PP, PET, PA and PPS, but it can also be woven or nonwovens made of natural, optionally treated fibers, such as viscose fiber webs are used. The fabrics or nonwovens used have a basis weight of about 20 g / m 2 up to 500 g / m 2 . Optionally, these fabrics or nonwovens may be surface treated.

Das Trägersubstrat wird mit einer Farbe oder einem Lack mit magnetischen Eigenschaften bedruckt.The carrier substrate is printed with a paint or a paint having magnetic properties.

Geeignet zur in situ Herstellung codierter magnetischer Merkmale sind Magnetfarben, die in der Lage sind magnetische Felder mit hoher Flussdichte hervorzurufen oder Magnetfelder hoher Dichte zu leiten. Der messbare Gradient des magnetischen Flusses wird durch Dickenmodulation der magnetischen Schichten erzeugt.Magnetic colors capable of inducing high flux density magnetic fields or conducting high density magnetic fields are suitable for producing coded magnetic features in situ. The measurable gradient of the magnetic flux is generated by thickness modulation of the magnetic layers.

Besonders geeignet sind Magnetpigmentfarben mit Pigmenten auf Basis von Fe-oxiden, wie Fe2O3 oder Fe3O4, Eisen, Nickel, Cobalt und deren Legierungen, Cobalt/Samarium, Barium oder Cobalt-ferrite, hart- und weich magnetische Eisen- und Stahlsorten in wässrigen bzw. lösungsmittelhaltigen Dispersionen. Als Lösungsmittel kommen beispielsweise i-Propanol, Ethylacetat, Methylethylketon, Methoxypropanol, Aliphate oder Aromate und deren Mischungen in Frage.
Vorzugsweise sind die Pigmente in Acrylat- Polymerdispersionen mit einem Molekulargewicht von 150.000 bis 300.000, in Acrylat-Urethan-Dispersionen, Acrylat- Styrol oder PVC-haltigen Dispersionen oder in lösemittelhaltige derartige Dispersionen eingebracht.Particularly suitable are magnetic pigment paints with pigments based on Fe oxides, such as Fe 2 O 3 or Fe 3 O 4 , iron, nickel, cobalt and their alloys, cobalt / samarium, barium or cobalt ferrite, hard and soft magnetic iron. and steel grades in aqueous or solvent-containing dispersions. Suitable solvents are, for example, i-propanol, ethyl acetate, methyl ethyl ketone, methoxypropanol, aliphatics or aromatics and mixtures thereof.
Preferably, the pigments are incorporated in acrylate polymer dispersions having a molecular weight of from 150,000 to 300,000, in acrylate-urethane dispersions, acrylate-styrene or PVC-containing dispersions or in solvent-containing dispersions of this type.

Insbesondere geeignet sind Magnetfarben mit Pigmenten auf Basis von Cr/Ni-Stahl, Al/Fe3O4 und dergleichen. Diese Magnetfarben zeigen im Gegensatz zu den konventionellen Magnetfarben, die schwarz, braun oder grau erscheinen, ein silbriges Erscheinungsbild und weisen gleichzeitig die oben beschriebenen erforderlichen magnetischen Eigenschaften auf. Dadurch ist es möglich, das für viele Anwendungen erwünschte bzw. erforderliche metallisch glänzende Erscheinungsbild in einem Arbeitsgang bereits durch Verdrucken dieser Magnetfarben zu erzeugen. Ein Überdrucken bzw. Beschichten mit metallischen oder Metall-Schichten zur Erzeugung des gewünschten Erscheinungsbildes ist daher nicht nötig, kann aber beispielsweise zur Einbringung weiterer identifikationsmerkmale problemlos erfolgen.Particularly suitable are magnetic paints with pigments based on Cr / Ni steel, Al / Fe 3 O 4 and the like. These magnetic colors, in contrast to the conventional magnetic colors, which appear black, brown or gray, have a silvery appearance and at the same time have the required magnetic properties described above. This makes it possible to produce the desired or required for many applications shiny metallic appearance in one operation already by printing these magnetic colors. Overprinting or coating with metallic or metal layers to produce the desired appearance is therefore not necessary, but can be done without problems, for example, to introduce further identification features.

Derartige beschriebene Magnetfarben ermöglichen es den notwendigen Gradienten des magnetischen Flusses über geringe Schichtdickenänderungen zu erzeugen.Such described magnetic colors make it possible to generate the necessary gradients of magnetic flux over small changes in layer thickness.

Das Bedrucken erfolgt vorzugsweise mit Hilfe eines laserbelichteten Zylinders oder einer Druckplatte vorzugsweise im Tiefdruckverfahren, wobei das Druckwerkzeug (Zylinder oder Druckplatte) so ausgestaltet ist, dass die codierte magnetische Schicht gegebenenfalls gleichzeitig mit den abzubildenden Zeichen, Mustern, Buchstaben, geometrischen Figuren, Linien und Guillochen gedruckt werden kann.The printing is preferably carried out by means of a laser-coated cylinder or a printing plate, preferably in the gravure printing method, wherein the printing tool (cylinder or printing plate) is designed so that the coded magnetic layer may be imaged simultaneously with the Signs, patterns, letters, geometric figures, lines and guilloches can be printed.

Nach den derzeit bekannten Verfahren zur Herstellung von laserbelichteten Druckwerkzeugen (Scheppersverfahren, Thinkverfahren) ist die Herstellung von flächenvariablen, aber nicht tiefenvariablen Strukturen auf dem Druckwerkzeug möglich.According to the currently known methods for the production of laser-printed printing tools (Scheppersverfahren, Thinkverfahren), the production of variable-area, but not depth-variable structures on the printing tool is possible.

Nachfolgend wird ein Verfahren zur Herstellung eines sowohl flächen- als auch tiefenvariablen Druckwerkzeugs am Beispiel eines Druckzylinders beschrieben.Hereinafter, a method for producing a both surface and depth variable pressure tool using the example of a printing cylinder will be described.

Ein Zylinderrohling, der für den Tiefdruck geeignet ist, wird mit einer mindestens 80 µm dicken Kupferschicht, beispielsweise in einem bekannten galvanischen Verfahren versehen, wobei je nach Material des Rohlings, beispielsweise Aluminium und Eisen gegebenenfalls vorher eine Haftvermittlerschicht, beispielsweise aus Nickel aufgebracht werden kann. Die Dicke der Kupferschicht beträgt mindestens 80 µm, üblicherweise 100 - 1500 µm, bevorzugt 250 - 500 µm.A cylinder blank suitable for gravure printing is provided with a copper layer at least 80 μm thick, for example in a known galvanic process, it being possible, depending on the material of the blank, for example aluminum and iron, to previously apply an adhesion promoter layer, for example of nickel. The thickness of the copper layer is at least 80 .mu.m, usually 100-1500 .mu.m, preferably 250-500 .mu.m.

Der Zylinderrohling wird auf genaues Umfangmaß abgedreht und anschließend auf die entsprechende Rauhigkeit geschliffen. Vorzugsweise beträgt der Rauhigkeitswert Ra 0,03 - 2,0, besonders bevorzugt 0,05 - 1,5, insbesondere 0,06 - 1,2.The cylinder blank is turned to the exact girth and then ground to the appropriate roughness. The roughness value Ra is preferably 0.03-2.0, particularly preferably 0.05-1.5, in particular 0.06-1.2.

Anschließend wird auf einer Gravurmaschine, beispielsweise einer Gravurmaschine der Hersteller Hell oder Ohio an der Seite ein Passkreuz in definierter Größe, beispielsweise 5x5mm, Stärke 0,2 mm aufgraviert.Subsequently, engraved on an engraving machine, such as an engraving machine manufacturer Hell or Ohio on the side of a passport in a defined size, for example 5x5mm, thickness 0.2 mm.

Der so vorbereitete Zylinder wird mit einem handelsüblichen Photoresist, beispielsweise LD 100 der Fa. OHKA Kogyo Ltd., beschichtet. Die Dicke dieser Beschichtung beträgt etwa 3 - 5 µm.The cylinder prepared in this way is coated with a commercially available photoresist, for example LD 100 from OHKA Kogyo Ltd. The thickness of this coating is about 3 - 5 microns.

Anschließend wird der Zylinder gegebenenfalls mit einem Overcoat mit einer Schichtdicke von 1 - 5 µm versehen, beispielsweise mit OC-40 der oben genannten Firma oder mit einer analogen ähnlichen handelsüblichen Zusammensetzung.Subsequently, the cylinder is optionally provided with an overcoat with a layer thickness of 1-5 microns, for example with OC-40 of the above company or with an analogous commercially available composition.

Anschließend wird der Zylinder belichtet, beispielsweise mit einem Ar/Ne-Laser. Zur Steuerung des Nullweitenpunkts und des Nordimpulses wird am Laser mit Hilfe einer Optik und einer Kamera (CCD-Kamera) der Referenzpunkt festgelegt.
Dabei werden die als Schutzschicht benötigten Teile belichtet. Üblicherweise weist der Laserstrahl eine Werkzeugbreite von 5 µm auf, was einer Auflösung von 40.000 Punkten/mm2 entspricht.Subsequently, the cylinder is exposed, for example with an Ar / Ne laser. To control the zero point and the north impulse, the reference point is determined on the laser with the aid of optics and a camera (CCD camera).
The parts required as a protective layer are exposed. Usually, the laser beam has a tool width of 5 μm, which corresponds to a resolution of 40,000 points / mm 2 .

Anschließend wird der belichtete Zylinder entwickelt, beispielsweise in einer Natriumcarbonatlösung (0,5% Lösung), daran schließt üblicherweise ein Reinigungsvorgang mit Wasser an, worauf der Zylinder getrocknet wirdSubsequently, the exposed cylinder is developed, for example in a sodium carbonate solution (0.5% solution), this is usually followed by a cleaning process with water, after which the cylinder is dried

Der belichtete und entwickelte Zylinder wird nun auf die erste gewünschte Tiefe mit einer CuCl2-Lösung geätzt, oder es wird mittels eines bekannten galvanischen Verfahrens die Dicke der Kupferschicht an der Oberfläche entsprechend reduziert.
Anschließend wird die erste Photoresistschicht entfernt, worauf wiederum ein neuer Photoresist, wie oben beschrieben, aufgebracht wird, eine weitere Belichtung erfolgt und anschließend die Ätzung bzw. der galvanische Kupferabtrag auf die gewünschte zweite Tiefe erfolgt.
Auf diese Weise können unterschiedliche Tiefen auf dem Zylinder bzw. dem Druckwerkzeug hergestellt werden. Das beschriebene Verfahren ist so oft wiederholbar, bis man gegebenenfalls auf die Haftvermittlerschicht trifft.The exposed and developed cylinder is now etched to the first desired depth with a CuCl 2 solution, or the thickness of the copper layer on the surface is correspondingly reduced by means of a known galvanic process.
Subsequently, the first photoresist layer is removed, whereupon a new photoresist, as described above, is applied, a further exposure takes place and then the etching or the galvanic copper removal takes place to the desired second depth.
In this way, different depths can be made on the cylinder or the printing tool. The process described can be repeated until it is possible to encounter the primer layer.

Als erste Tiefe sind beispielsweise in Abhängigkeit von den gewünschten Strukturen und der gewünschten magnetischen Codierung 10 - 150 µm, vorzugsweise 12 - 80 µm, besonders bevorzugt 50 - 60 µm denkbar, für die zweite Tiefe 10 - 150 µm, vorzugsweise 12 - 80 µm, besonders bevorzugt 30 - 40 µm denkbar.
Je nach Geometrie und Anordnung der Vertiefungen erfolgt im ersten Schritt entweder die Erzeugung der größten Tiefe bzw. der geringsten Ätztiefe.As a first depth, for example, depending on the desired structures and the desired magnetic coding 10-150 .mu.m, preferably 12-80 .mu.m, particularly preferably 50-60 .mu.m are conceivable for the second depth 10-150 .mu.m, preferably 12-80 .mu.m, more preferably 30-40 .mu.m conceivable.
Depending on the geometry and arrangement of the depressions, either the generation of the greatest depth or the lowest etching depth takes place in the first step.

Auf analoge Weise ist die Herstellung einer Druckplatte möglich.In an analogous manner, the production of a printing plate is possible.

Bei Verwendung geeigneter Laserenergie sind analog auch Keramikzylinder oder andere Metallzylinder mit der erfindungsgemäßen flächen - und tiefenvariablen Oberfläche herstellbar.
Ferner können derartige Strukturen auch unter Verwendung eines Stichels oder eines Rasters in Abwandlung konventioneller Verfahren hergestellt werden.If suitable laser energy is used, ceramic cylinders or other metal cylinders with the surface and depth-variable surface according to the invention can also be produced analogously.
Further, such structures can also be made using a stylus or raster as a modification of conventional techniques.

Ein derart mit einer flächen- und tiefenvariablen Oberfläche versehenes Druckwerkzeug wird zur Herstellung des erfindungsgemäßen Sicherheitsmerkmals verwendet. Durch die Tiefenmodulation wird bei Verdrucken einer entsprechenden magnetischen Druckfarbe eine Signalmodulation erreicht.Such provided with a surface and depth variable surface pressure tool is used to produce the security feature of the invention. The depth modulation results in signal modulation when printing a corresponding magnetic ink.

Dabei wird die magnetische Druckfarbe in unterschiedlicher Dicke und Form entsprechend der Oberfläche des Druckwerkzeugs in einem Arbeitsschritt auf das Trägersubstrat aufgebracht.In this case, the magnetic ink is applied in different thickness and shape corresponding to the surface of the printing tool in one step on the carrier substrate.

Das Trägersubstrat kann bereits funktionelle oder dekorative Schichten aufweisen, oder es können nach Aufbringen der magnetisch codierten Schicht weitere Schichten aufgebracht werden.The carrier substrate may already have functional or decorative layers, or further layers may be applied after the magnetically encoded layer has been applied.

Die Trägersubstrate können aber auch bereits zusätzlich eine Lack- oder Farbschicht aufweisen, die unstrukturiert oder strukturiert, beispielsweise geprägt sein kann. Die Lackschicht kann beispielsweise eine releasefähige Transferlackschicht sein, sie kann durch Strahlung, beispielsweise UV-Strahlung vernetzt oder vernetzbar sein und kratzfest und/oder antistatisch ausgerüstet sein. Geeignet sind sowohl wässrige als auch feste Lacksysteme, insbesondere auch Lacksysteme auf Basis Polyester-Acrylat oder Epoxyacrylat Kolophonium-, Acrylat-, Alkyd-, Melamin-, PVA-, PVC-, Isocyanat-, Urethansysteme, die konventionell oder reaktiv härtend Gemisch oder strahlungshärtend) sein können.However, the carrier substrates can also additionally have a lacquer or color layer, which can be unstructured or structured, for example embossed. The lacquer layer can be, for example, a release-capable transfer lacquer layer, it can be crosslinked or crosslinkable by radiation, for example UV radiation, and scratch-resistant and / or antistatic be equipped. Both aqueous and solid coating systems, in particular lacquer systems based on polyester acrylate or epoxy acrylate rosin, acrylate, alkyd, melamine, PVA, PVC, isocyanate, urethane systems, conventional or reactive curing mixture or radiation-curing are suitable ) could be.

Als Farb- bzw. Lackschichten können jeweils verschiedenste Zusammensetzungen verwendet werden. Die Zusammensetzung der einzelnen Schichten kann insbesondere nach deren Aufgabe variieren, also ob die einzelnen Schichten ausschließlich Dekorationszwecken dienen oder eine funktionelle Schicht sein sollen oder ob die Schicht sowohl eine Dekorationsals auch eine funktionelle Schicht sein soll.As color or lacquer layers in each case a wide variety of compositions can be used. The composition of the individual layers may in particular vary according to their purpose, that is to say whether the individual layers serve exclusively for decorative purposes or should be a functional layer or whether the layer should be both a decoration layer and a functional layer.

Diese Schichten können pigmentiert oder nicht pigmentiert sein. Als Pigmente können alle bekannten Pigmente, wie beispielsweise Titandioxid, Zinksulfid, Kaolin, ITO, ATO, FTO, Aluminium, Chrom- und Siliciumoxide als auch farbige Pigmente verwendet werden. Dabei sind lösungsmittelhaltige Lacksysteme als auch System ohne Lösungsmittel verwendbar.These layers may be pigmented or unpigmented. As pigments, it is possible to use all known pigments, such as, for example, titanium dioxide, zinc sulfide, kaolin, ITO, ATO, FTO, aluminum, chromium oxides and silicon oxides, and also colored pigments. In this case, solvent-based coating systems and systems without solvents can be used.

Als Bindemittel kommen verschiedene natürliche oder synthetische Bindemittel in Frage.Suitable binders are various natural or synthetic binders.

Diese weiteren bereits auf dem Trägersubstrat vorhandenen oder im Anschluss aufgebrachten funktionellen Schichten beispielsweise können bestimmte chemische, physikalische und auch optische Eigenschaften aufweisen.These further functional layers already present on the carrier substrate or subsequently applied, for example, can have certain chemical, physical and also optical properties.

Die optischen Eigenschaften einer weiteren Schicht lassen sich durch sichtbare Farbstoffe bzw. Pigmente, lumineszierende Farbstoffe bzw. Pigmente, die im sichtbaren, im UV-Bereich oder im IR-Bereich fluoreszieren bzw. phosphoreszieren, Effektpigmente, wie Flüssigkristalle, Perlglanz, Bronzen und/oder Multilayer-Farbumschlagpigmente und wärmeempfindliche Farben bzw. Pigmente beeinflussen. Diese sind in allen möglichen Kombinationen einsetzbar. Zusätzlich können auch phosphoreszierende Pigmente allein oder in Kombination mit anderen Farbstoffen und/oder Pigmenten eingesetzt werden.The optical properties of a further layer can be visualized by visible dyes or pigments, luminescent dyes or pigments which fluoresce or phosphoresce in the visible, in the UV region or in the IR region, effect pigments, such as liquid crystals, pearlescent, bronzes and / or Multilayer color change pigments and heat-sensitive colors or pigments influence. These are in all possible combinations used. In addition, phosphorescent pigments can also be used alone or in combination with other dyes and / or pigments.

Ferner können auch elektrisch leitfähige Schichten auf dem Substrat vorhanden sein, oder anschließend aufgebracht werden, beispielsweise elektrisch leitfähige polymere Schichten oder leitfähige Farb- oder Lackschichten.Furthermore, electrically conductive layers can also be present on the substrate, or subsequently applied, for example electrically conductive polymer layers or conductive paint or lacquer layers.

Zur Einstellung der elektrischen Eigenschaften können der aufzubringenden Farbe bzw. dem aufzubringenden Lack, beispielsweise Graphit, Ruß, leitfähige organische oder anorganische Polymere, Metallpigmente (beispielsweise Kupfer, Aluminium, Silber, Gold, Eisen und Chrom, Metalllegierungen wie Kupfer-Zink oder Kupfer-Aluminium oder auch amorphe oder kristalline keramische Pigmente wie ITO, ATO und FTO zugegeben werden. Weiters können auch dotierte oder nicht dotierte Halbleiter wie beispielsweise Silicium, Germanium oder dotierte oder nicht dotierte polymere Halbleiter oder lonenleiter wie amorphe oder kristalline Metalloxide oder Metallsulfide als Zusatz verwendet werden. Ferner können zur Einstellung der elektrischen Eigenschaften der Schicht polare oder teilweise polare Verbindungen wie Tenside, oder unpolare Verbindungen wie Silikonadditive oder hygroskopische oder nicht hygroskopische Salze verwendet oder dem Lack zugesetzt werden.To adjust the electrical properties of the applied color or the applied paint, such as graphite, carbon black, conductive organic or inorganic polymers, metal pigments (for example, copper, aluminum, silver, gold, iron and chromium, metal alloys such as copper-zinc or copper-aluminum or amorphous or crystalline ceramic pigments such as ITO, ATO and FTO, and doped or non-doped semiconductors such as silicon, germanium or doped or non-doped polymeric semiconductors or ionic conductors such as amorphous or crystalline metal oxides or metal sulfides may also be used as additive. Furthermore, polar or partially polar compounds such as surfactants, or nonpolar compounds such as silicone additives or hygroscopic or non-hygroscopic salts can be used or added to the paint for adjusting the electrical properties of the layer.

Als Schicht mit elektrischen Eigenschaften kann auch eine vollflächige oder partielle Metallschicht aufgebracht werden, wobei die partielle Aufbringung mittels eines Ätzverfahrens (Aufbringung einer vollflächigen Metallschicht und anschließende partielle Entfernung durch Ätzen) oder mittels eine Demetallisierungsverfahrens erfolgen kann.
Bei Verwendung eines Demetallisierungsverfahrens wird in einem ersten Schritt vorzugsweise eine in einem Lösungsmittel lösliche Farbe (gegebenenfalls in Form einer inversen Codierung) aufgebracht, anschließend wird, gegebenenfalls nach Aktivierung des Trägersubstrats durch eine Plasma- oder Coronabehandlung, die metallische Schicht aufgebracht, worauf die lösliche Farbschicht durch Behandlung mit einem geeigneten Lösungsmittel samt der in diesen Bereichen vorhandenen Metallisierung abgelöst wird.As a layer having electrical properties, it is also possible to apply a full-surface or partial metal layer, wherein the partial application can be effected by means of an etching process (application of a full-surface metal layer and subsequent partial removal by etching) or by means of a demetallization process.
When using a demetallization process, preferably in a first step, a solvent-soluble color (optionally in the form of an inverse coding) is applied, then, optionally after activation of the carrier substrate by a plasma or Corona treatment, the metallic layer is applied, whereupon the soluble color layer is removed by treatment with a suitable solvent, including the metallization present in these areas.

Ferner kann als elektrisch leitfähige Schicht auch eine elektrisch leitfähige Polymerschicht aufgebracht werden. Die elektrisch leitfähigen Polymeren können beispielsweise Polyanilin oder Polyethylendioxythiophen sein.Furthermore, an electrically conductive polymer layer can also be applied as the electrically conductive layer. The electrically conductive polymers may be, for example, polyaniline or polyethylenedioxythiophene.

Es ist auch möglich der verwendeten Magnetfarbe, beispielsweise Ruß oder Graphit zuzusetzen, wodurch eine gleichzeitig magnetische als auch elektrisch leltfähige Schicht in definierter Codierung nach dem erfindungsgemäßen Verfahren besonders vorteilhaft herstellbar ist.It is also possible to add the magnetic ink used, for example, carbon black or graphite, whereby a simultaneously magnetic and electrically lelable layer can be produced particularly advantageously in a defined coding by the method according to the invention.

Ferner kommen als zusätzliche Sicherheitsmerkmale auch weitere Oberflächenreliefstrukturen, beispielsweise Beugungsgitter und Hologramme in Frage, wobei diese Strukturen gegebenenfalls auch metallisiert oder partiell metallisiert sein können.Furthermore, additional surface relief structures, for example diffraction gratings and holograms, may also be considered as additional security features, wherein these structures may optionally also be metallised or partially metallised.

Zur Herstellung derartiger Oberflächenstrukturen wird vorerst UV-härtbarer tiefziehfähiger Lack aufgebracht. Anschließend kann beispielsweise eine Oberflächenstruktur durch Abformen einer Matrize in diesen Lack, der zum Zeitpunkt der Abformung bis zum Gelpunkt vorgehärtet ist, hergestellt, worauf anschließend der strahlungshärtbare Lack nach Aufbringung der Oberflächenstruktur vollständig ausgehärtet wird.For the production of such surface structures UV-curable deep-drawable lacquer is applied for the time being. Subsequently, for example, a surface structure by molding a die in this paint, which is pre-cured at the time of molding to the gel point, prepared, whereupon the radiation-curable paint is completely cured after application of the surface structure.

Durch die Verwendung des UV-härtbaren Lacks sind nach der Aushärtung darauf aufgebrachte Schichten, auch eine gegebenenfalls eingebrachte Oberflächenstruktur, auch unter Temperaturbelastung stabil.Due to the use of the UV-curable lacquer, layers which have been applied thereto after curing, and also an optionally introduced surface structure, are stable even under temperature load.

Der strahlungshärtbare Lack kann beispielsweise ein strahlungshärtbares Lacksystem auf Basis eines Polyester-, eines Epoxy oder Polyurethansystems das zwei oder mehr verschiedene, dem Fachmann geläufige Photoinitiatoren enthält, die bei unterschiedlichen Wellenlängen eine Härtung des Lacksystems in unterschiedlichem Ausmaß initiieren können. So kann beispielsweise ein Photoinitiator bei einer Wellenlänge von 200 bis 400 nm aktivierbar sein, der zweite Photoinitiator dann bei einer Wellenlänge von 370 bis 600 nm. Zwischen den Aktivierungswellenlängen der beiden Photoinitiatoren sollte genügend Differenz eingehalten werden, damit nicht eine zu starke Anregung des zweiten Photointiators erfolgt, während der erste aktiviert wird. Der Bereich, in dem der zweite Photoinitiator angeregt wird, sollte im Transmissionswellenlängenbereich des verwendeten Trägersubstrats liegen. Für die Haupthärtung (Aktivierung des zweiten Photoinitiators) kann auch Elektronenstrahlung verwendet werden.The radiation-curable lacquer can be, for example, a radiation-curable lacquer system based on a polyester, an epoxy or polyurethane system containing two or more different, known in the art photoinitiators that can initiate curing of the paint system to different degrees at different wavelengths. Thus, for example, one photoinitiator can be activated at a wavelength of 200 to 400 nm, the second photoinitiator then at a wavelength of 370 to 600 nm. Between the activation wavelengths of the two photoinitiators sufficient difference should be maintained, so that not too strong excitation of the second Photointiators takes place while the first is activated. The region in which the second photoinitiator is excited should be in the transmission wavelength range of the carrier substrate used. For the main curing (activation of the second photoinitiator) also electron radiation can be used.

Als strahlungshärtbarer Lack kann auch ein wasserverdünnbarer Lack verwendet werden. Bevorzugt werden Lacksysteme auf Polyesterbasis.As a radiation-curable varnish, a water-thinnable varnish can also be used. Preference is given to polyester-based paint systems.

Ferner können die erfindungsmäßigen Sicherheitselemente mit einer Schutzlackschicht ein- oder beidseitig versehen sein. Der Schutzlack kann pigmentiert oder nicht pigmentiert sein, wobei als Pigmente alle bekannte Pigmente oder Farbstoffe, beispielsweise TiO2, ZnS, Kaolin, ATO, FTO, Aluminium, Chrom- und Siliziumoxide oder beispielsweise organische Pigmente wie Pthalocyaninblau, i-Indolidgelb und Dioxazinviolett verwendet werden können. Ferner können lumineszierende Farbstoffe bzw. Pigmente, die im sichtbaren, im UV-Bereich oder im IR-Bereich fluoreszieren bzw. phosphoreszieren, Effektpigmente wie Flüssigkeitskristalle, Perlglanz, Bronzen und/oder Multilayer-Farbumschlagpigmente und wärmeempfindliche Farben bzw. Pigmente zugegeben werden. Diese sind in allen möglichen Kombinationen einsetzbar. Zusätzlich können auch phosphoreszierende Pigmente allein oder in Kombination mit anderen Farbstoffen und/oder Pigmenten eingesetzt werden.Furthermore, the inventive security elements can be provided with a protective lacquer layer on one or both sides. The protective lacquer may be pigmented or unpigmented, using as pigments all known pigments or dyes, for example TiO 2 , ZnS, kaolin, ATO, FTO, aluminum, chromium and silicon oxides or, for example, organic pigments such as pthalocyanine blue, i-indolid yellow and dioxazine violet can. Furthermore, luminescent dyes or pigments which fluoresce or phosphoresce in the visible, in the UV range or in the IR range, effect pigments such as liquid crystals, pearlescent, bronzes and / or multilayer color change pigments and heat-sensitive inks or pigments can be added. These can be used in all possible combinations. In addition, phosphorescent pigments can also be used alone or in combination with other dyes and / or pigments.

Ferner kann ein Sicherheitselement mit einem Heiß- oder Kaltsiegelkleber oder einer Selbstklebebeschichtung zur Aufbringung auf das zu schützende Wertdokument oder eine Verpackung versehen sein.Furthermore, a security element may be provided with a hot or cold seal adhesive or a self-adhesive coating for application to the security document or a package to be protected.

Es ist auch möglich das Sicherheitselement mit einem weiteren Trägersubstrat, das gegebenenfalls weitere funktionelle Schichten aufweist, zu kaschieren.It is also possible to laminate the security element with a further carrier substrate, which optionally has further functional layers.

Die Sicherheitselemente werden gegebenenfalls nach entsprechender Konfektionierung (beispielsweise zu Fäden, Bändern, Streifen, Patches oder anderen Formaten) daher a!s Sicherheitsmerkmale in Datenträgern, insbesondere Wertdokumenten wie Ausweisen, Karten, Banknoten oder Etiketten und Siegeln, aber auch in Verpackungsmaterialien für sensible Güter, wie Pharmazeutika, Lebensmittel, Kosmetika, Datenträger und elektronische Bauteile verwendet. Ferner können die Sicherheitselemente auf Verpackungsmaterialien für unterschiedlichste Güter, beispielsweise auf Folien, Papier, Schachteln und Kartons appliziert werden.The security elements, if appropriate after appropriate assembly (for example, into threads, tapes, strips, patches or other formats), therefore, have security features in data carriers, in particular value documents such as identity cards, cards, banknotes or labels and seals, but also in packaging materials for sensitive goods, such as pharmaceuticals, food, cosmetics, data carriers and electronic components. Furthermore, the security elements can be applied to packaging materials for a wide variety of goods, such as films, paper, boxes and cartons.

Beispiele:Examples: Beispiel 1:Example 1:

Es wird ein Zylinder mit einem Profil entsprechend Fig. 1 hergestellt. Ein Zylinderrohling aus Aluminium wird eine 5 µm dicke Haftvermittlerschicht aus Nickel aufgebracht. Anschließend wird galvanisch eine 300 µm dicke Kupferschicht abgeschieden.
Der Zylinderrohling wird auf genaues Umfangmaß abgedreht und anschließend auf eine Rauhigkeit Ra von 0,09 geschliffen.
Anschließend wird auf einer Gravurmaschine, beispielsweise einer Gravurmaschine des Typs Hell oder Ohio an der Seite ein Passkreuz (5 x 5 mm, Stärke 0,2 mm) aufgraviert.
Der so vorbereitete Zylinder wird mit einer 4 µm dicken Schicht des Photoresists LD 100 der Fa. OHKA, beschichtet.
Anschließend wird der Zylinder gegebenenfalls mit einem Overcoat mit einer Schichtdicke von 2 µm versehen, (OC-40).It will be a cylinder with a profile accordingly Fig. 1 produced. A cylindrical blank of aluminum is applied to a 5 micron thick adhesive layer of nickel. Subsequently, a 300 μm thick copper layer is electrodeposited.
The cylinder blank is turned to the exact extent and then ground to a roughness Ra of 0.09.
Subsequently, engraved on an engraving machine, for example, a engraving machine of the type Hell or Ohio on the side of a passport (5 x 5 mm, thickness 0.2 mm).
The cylinder prepared in this way is coated with a 4 μm thick layer of the photoresist LD 100 from OHKA.
Subsequently, the cylinder is optionally provided with an overcoat with a layer thickness of 2 microns, (OC-40).

Die Belichtung erfolgt mit einem Ar/Ne-Laser mit einer Werkzeugbreite von 5 µm nach Festelegung des Referenzpunktes, worauf der belichtete Zylinder in einer 0,5% Natriumcarbonatlösung entwickelt wird.The exposure is carried out with an Ar / Ne laser with a tool width of 5 microns after fixing the reference point, whereupon the exposed cylinder is developed in a 0.5% sodium carbonate solution.

Der belichtete und entwickelte Zylinder wird nun auf die erste gewünschte Tiefe mit einer CuCl2-Lösung geätzt, wobei in diesem Fall mit der größten Tiefe begonnen wird. Die Tiefe der Ätzung beträgt 150 µm.The exposed and developed cylinder is now etched to the first desired depth with a CuCl 2 solution, in which case the greatest depth is begun. The depth of the etching is 150 μm.

Anschließend wird die erste Photoresistschicht entfernt, worauf wiederum ein neuer Photoresist wie oben beschrieben aufgebracht wird, eine weitere Belichtung erfolgt und anschließend die Ätzung auf eine Tiefe von 80 µm erfolgt.
Für den dritten Ätzvorgang wird nach Entfernen der Photoresistschicht, Aufbringen einer neuen Photoresistschicht, Belichtung und Entwicklung eine Ätztiefe von 40 µm gewählt.Subsequently, the first photoresist layer is removed, whereupon a new photoresist is applied as described above, a further exposure takes place and then the etching is carried out to a depth of 80 μm.
For the third etch, an etch depth of 40 microns is selected after removal of the photoresist layer, application of a new photoresist layer, exposure, and development.

Mittels eines derart hergestellten Tiefdruckzylinders wird eine Magnetfarbe bestehend aus 40 % Cr/Ni-Stahlpigmenten (3µm) in einer Acrylat-Polymerdispersion auf eine Polyesterfolie einer Dicke von 7 µm aufgebracht.By means of a rotogravure cylinder produced in this way, a magnetic ink consisting of 40% Cr / Ni steel pigments (3 .mu.m) in an acrylate polymer dispersion is applied to a polyester film having a thickness of 7 .mu.m.

Die Koerzitivfeldstärke betrug 90 Oerstedt, die Flussdichte 200 - 600 nW/m, moduliertThe coercive force was 90 Oerstedt, the flux density 200 - 600 nW / m, modulated

Beispiel 2:Example 2:

Es wird ein Zylinder mit einem Profil entsprechend Fig. 2 hergestellt.
Dabei wird der Zylinder analog Beispiel 1 vorbereitet und es werden wiederum 3 unterschiedliche Ätztiefen vorgesehen. Der Ätzvorgang kann dabei entweder mit der größten Tiefe oder mit der geringsten Tiefe begonnen werden. Es wurden folgende Ätztiefen vorgesehen: 120 µm, 70 µm und 10 µm.It will be a cylinder with a profile accordingly Fig. 2 produced.
The cylinder is prepared analogously to Example 1 and again 3 different etching depths are provided. The etching process can be started either with the greatest depth or the lowest depth. The following etching depths were provided: 120 μm, 70 μm and 10 μm.

Mittels dieses Zylinders wird eine Magnetpigmentfarbe mit 20% Fe2O3 - Pigmenten in Nitrocellulose auf eine Polypropylenfolie einer Dicke von 5 µm aufgebracht.By means of this cylinder, a magnetic pigment color with 20% Fe 2 O 3 pigments in nitrocellulose is applied to a polypropylene film having a thickness of 5 μm.

Die Koerzitivfeldstärke betrug 250 Oerstedt, die Flussdichte 100 - 400 nW/m, moduliert.The coercive force was 250 Oerstedt, the flux density 100 - 400 nW / m, modulated.

Claims (11)

  1. Process for manufacturing a film material with magnetic coding, having a flexible carrier substrate, a printing ink containing magnetic pigment or a metallic magnetic printing ink being printed onto the carrier substrate by means of a laser-exposed cylinder or a printing plate in such a way that the magnetic code is produced simultaneously with recesses in the form of patterns, symbols, letters, geometric figures, lines and guilloches by means of thickness modulation of the magnetic layer, characterized in that the printing ink containing magnetic pigment or a metallic magnetic printing ink is printed by means of a laser-exposed cylinder or a printing plate having variable-area and variable-depth structures.
  2. Process according to Claim 1, characterized in that further functional and/or decorative layers are additionally applied to the film material.
  3. Process according to either of Claims 1 and 2, characterized in that electrically conductive and/or optically active and/or chromophoric layers are additionally applied to the film material.
  4. Process according to either of Claims 2 and 3, characterized in that the layers are applied all over or partially to the film material.
  5. Process according to one of Claims 1 to 4, characterized in that the film material is provided with a protective varnish layer on one or both sides.
  6. Process according to Claim 5, characterized in that the protective varnish layer is pigmented.
  7. Process according to one of Claims 1 to 6, characterized in that the film material is laminated with one or more carrier substrate(s) which has/have possibly functional and/or decorative layers.
  8. Process according to Claim 7, characterized in that the laminating adhesive is pigmented.
  9. Process according to one of Claims 1 to 8, characterized in that the film material is provided with a hot-melt or cold-seal adhesive or a self-adhesive coating on one or both sides.
  10. Process according to Claim 9, characterized in that the hot-melt or cold-seal adhesive or the self-adhesive coating is applied all over or partially or in a structured manner.
  11. Process according to Claim 10, characterized in that the hot-melt or cold-seal adhesive or the self-adhesive coating is pigmented.
EP04013942.0A 2003-06-17 2004-06-15 Manufacturing process for a security element Not-in-force EP1488935B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT9352003A AT500908A1 (en) 2003-06-17 2003-06-17 Safety element with magnetic coding, method and device for the production thereof and its use
AT9352003 2003-06-17

Publications (3)

Publication Number Publication Date
EP1488935A2 EP1488935A2 (en) 2004-12-22
EP1488935A3 EP1488935A3 (en) 2011-12-28
EP1488935B1 true EP1488935B1 (en) 2016-06-08

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Application Number Title Priority Date Filing Date
EP04013942.0A Not-in-force EP1488935B1 (en) 2003-06-17 2004-06-15 Manufacturing process for a security element

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AT (1) AT500908A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1500521A3 (en) * 2003-07-22 2010-10-13 Hueck Folien Ges.m.b.H Security elements with machine readable features and colour effects
EP1693802A1 (en) * 2005-02-22 2006-08-23 Hueck Folien GmbH & Co. KG Electronic features for value documents
DE102005033598A1 (en) 2005-07-19 2007-01-25 Giesecke & Devrient Gmbh Value document, production and testing of value documents
DE102017202628B4 (en) 2017-02-17 2022-03-17 Trumpf Werkzeugmaschinen Gmbh + Co. Kg Method of encoding a plate-like workpiece, method of identifying a plate-like workpiece, radiation processing apparatus and coding system

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1222851B (en) * 1987-10-08 1990-09-12 Mantegazza A Arti Grafici MAGNETICALLY DETECTABLE IDENTIFICATION CODE TO MARK PRODUCTS, DOCUMENTS AND SIMILAR
DE4041025C2 (en) * 1990-12-20 2003-04-17 Gao Ges Automation Org Magnetic, metallic security thread with negative writing
DE19548528A1 (en) * 1995-12-22 1997-06-26 Giesecke & Devrient Gmbh Security document with a security element and method for its production
EP1310907B1 (en) * 1997-12-02 2005-04-20 Technical Graphics Security Products, LLC Security device having multiple security features
PL344862A1 (en) * 1998-06-16 2001-11-19 Whd Elektron Prueftech Gmbh Marking substances and security markings, method for integrating these into the pulp line and method for testing the same
DE10131153A1 (en) * 2001-06-28 2003-01-16 Giesecke & Devrient Gmbh security element
DE10149463A1 (en) * 2001-10-08 2003-04-24 Giesecke & Devrient Gmbh Printed machine-readable code e.g. for banknotes comprises areas of differing ink layer thickness

Also Published As

Publication number Publication date
EP1488935A2 (en) 2004-12-22
EP1488935A3 (en) 2011-12-28
AT500908A1 (en) 2006-04-15

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