EP1698486B1 - Method for making partial surface structures for security devices - Google Patents

Method for making partial surface structures for security devices Download PDF

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Publication number
EP1698486B1
EP1698486B1 EP05004401A EP05004401A EP1698486B1 EP 1698486 B1 EP1698486 B1 EP 1698486B1 EP 05004401 A EP05004401 A EP 05004401A EP 05004401 A EP05004401 A EP 05004401A EP 1698486 B1 EP1698486 B1 EP 1698486B1
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EP
European Patent Office
Prior art keywords
application
embossing
overcoat
surface structures
overcoating
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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.)
Not-in-force
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EP05004401A
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German (de)
French (fr)
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EP1698486A1 (en
Inventor
Stephan Trassl
Peter Reich
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Hueck Folien GmbH
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Hueck Folien GmbH
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Priority to DE502005001372T priority Critical patent/DE502005001372D1/en
Priority to AT05004401T priority patent/ATE371545T1/en
Priority to EP05004401A priority patent/EP1698486B1/en
Publication of EP1698486A1 publication Critical patent/EP1698486A1/en
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Publication of EP1698486B1 publication Critical patent/EP1698486B1/en
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Classifications

    • 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
    • B42D25/40—Manufacture
    • B42D25/405—Marking
    • B42D25/425—Marking by deformation, e.g. embossing
    • 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
    • B42D25/328—Diffraction gratings; Holograms
    • B42D2033/24—
    • 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
    • B42D25/324—Reliefs

Definitions

  • the invention relates to a process for the production of partial surface structures.
  • Surface structures are understood to mean diffraction structures, reflection structures, holograms, kinegrams, diffraction structures and the like.
  • partial surface structures For the production of partial surface structures, several methods are known. On the one hand, a partial origination can be produced, ie no full-surface pattern can be produced on the embossing mold. However, this method is very expensive.
  • embossing lacquer layer only partially in the desired areas, so that embossing can take place only in the areas coated with the embossing lacquer.
  • embossing lacquer layer only partially in the desired areas, so that embossing can take place only in the areas coated with the embossing lacquer.
  • the embossed layer is then either fully or partially metallized.
  • the hologram structures are still easily visible, which impairs the appearance of the partial hologram structure.
  • the object of the invention was to provide a simple and flexible method for producing partial surface structures.
  • the carrier substrates are for example carrier films, preferably flexible transparent plastic films, for example of P1, PP, MOPP, PE, PPS, PEEK, PEK, PEI, PAEK, LCP, PEN, PBT, PET, PA, PC, COC, POM, 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, staple fiber webs and the like, which may possibly be needled and / or calendered, can be used as carrier substrates.
  • fabrics or webs of plastics such as PP, PET, PA, PPS and the like, but it can also be woven or nonwovens of natural, optionally treated fibers, such as Viskosefasem be used.
  • the nonwovens or fabrics used have a weight per unit area of about 20 g / m 2 to 500 g / m 2 . If necessary, the nonwovens or fabrics must be surface-treated.
  • carrier substrate is coated with a radiation-curable lacquer in a coating or printing process such as, for example, a roller coating or a screen printing, gravure or flexographic printing process. Furthermore, register and control marks for the subsequent processing operations are applied to the carrier substrate.
  • the radiation-curable lacquer can contain, for example, a radiation-curable lacquer system based on a polyester, an epoxy or polyurethane system containing 2 or more different photoinitiators known to the person skilled in the art, which can initiate curing of the lacquer system to varying degrees at different wavelengths.
  • a photoinitiator can be activated at a wavelength of 200 to 400 nm, the second photoinitiator then activatable at a wavelength of 370 to 600 nm. Sufficient difference should be maintained between the activation wavelengths of the two photoinitiators to prevent over-excitation of the second photoinitiator while the first photoinitiator is activated.
  • 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 impression of the surface structure for example, at controlled temperature by means of a die or using a stamping mold in the radiation-curable lacquer layer, which was pre-cured by activation of the first photoinitiator to the gel point and at the time of the impression is at this stage. If a water-dilutable radiation-curable lacquer is used, it is optionally possible to precede predrying, for example by means of IR radiators.
  • the layer thickness of the applied radiation-curable lacquer can vary depending on the requirements of the end product and thickness of the substrate and is generally between 0.5 and 50 .mu.m, preferably between 2 and 10 .mu.m, more preferably between 2 and 5 .mu.m.
  • embossed structure is now applied in those areas where the embossed structure should not appear in the final product a topcoat.
  • the surface structure is leveled in the areas of the paint application.
  • overcoat for example, polymeric coating compositions come into question.
  • the application of the overcoat is preferably carried out by means of a so-called insetter method, preferably in a gravure printing process, wherein the provided with register marks and control lines web is measured over an upstream measuring device between two or more register marks in length and then the material web of a control loop, in particular a register over a register roller is controlled in register before the printing unit, wherein the page register on a web control is pre-controlled and controlled by a swing frame, and the material web is printed register and registration register with the topcoat.
  • insetter method preferably in a gravure printing process
  • the provided with register marks and control lines web is measured over an upstream measuring device between two or more register marks in length and then the material web of a control loop, in particular a register over a register roller is controlled in register before the printing unit, wherein the page register on a web control is pre-controlled and controlled by a swing frame, and the material web is printed register and registration register with the topcoat.
  • step c a solvent-soluble ink or color coat is applied by means of an inset process, preferably in a gravure printing process, congruently with the printing with the overdack.
  • the ink or lacquer used is soluble in a solvent, preferably water, but it is also possible to use a dye soluble in any solvent, for example in alcohol, esters and the like.
  • the color or the colored lacquer can be customary compositions based on natural or artificial macromolecules.
  • the soluble color may be pigmented or unpigmented.
  • pigments all known pigments can be used. Particularly suitable are TiO 2 , ZnS, kaolin and the like
  • the printed carrier substrate may be treated by means of an inline plasma (low pressure or atmospheric plasma), corona or flame process. This improves the adhesion of metals and the like to the surface.
  • inline plasma low pressure or atmospheric plasma
  • corona or flame process This improves the adhesion of metals and the like to the surface.
  • a thin metal or metal oxide layer can be applied as adhesion promoter, for example by sputtering or vapor deposition.
  • adhesion promoter particularly suitable are Cr, Al, Ag, Ti, Cu, TiO 2 , Si oxides or chromium oxides.
  • This adhesion promoter layer generally has a thickness of 0.1 nm to 5 nm, preferably 0.2 nm to 2 nm, particularly preferably 0.2 to 1 nm.
  • This layer consists of a metal, a metal compound or an alloy with suitable reflection properties.
  • the metal layer layers of Al, Cu, Fe, Ag, Au, Cr, Ni, Zn and the like are suitable.
  • suitable metal compounds are oxides or sulfides of metals, in particular TiO 2 , Cr oxides, ZnS, ITO, ATO, FTO, ZnO, or Al 2 O 3 .
  • Suitable alloys are, for example, Cu-Al alloys, Cu-Zn alloys and the like.
  • This metallic layer can be applied by known methods such as sputtering, sputtering, printing (gravure, flexographic, screen, digital printing and the like), spraying, electroplating and the like.
  • the process according to the invention for producing partial surface structures can be carried out economically and flexibly.
  • motivident cylinders are required for the application of the two layers.
  • the carrier substrates produced according to the invention may optionally be used after packaging as security elements, in particular in value documents and data carriers, for example banknotes, securities, identity documents, cards and the like, or used as security elements or security labels in packaging, textiles, seals and the like.

Abstract

The method for producing partial upper surface structures involves the deformation of an embossed structure after full surface mounting of the embossed finishing. Subsequent partial adaptation of an overcoat. A precise colour application to the overcoat at the third stage. The fourth stage involves the application of a metallic coat, whilst the fifth stage involves the colours of the metallic coat and the overcoat from the third stage cooperating. The overcoat may be a applied as a polymeric coating/primer.

Description

Die Erfindung betrifft ein Verfahren zur Herstellung von partiellen Oberflächenstrukturen.The invention relates to a process for the production of partial surface structures.

Unter Oberflächenstrukturen werden Beugungsstrukturen, Reflexionsstrukturen, Hologramme, Kinegramme, Diffraktionsstrukturen und dergleichen verstanden.Surface structures are understood to mean diffraction structures, reflection structures, holograms, kinegrams, diffraction structures and the like.

Zur Herstellung von partiellen Oberflächenstrukturen sind mehrere Verfahren bekannt. Es kann einerseits eine partielle Origination hergestellt werden, also kein vollflächiges Muster auf der Prägeform hergestellt werden. Dieses Verfahren ist jedoch sehr aufwendig.For the production of partial surface structures, several methods are known. On the one hand, a partial origination can be produced, ie no full-surface pattern can be produced on the embossing mold. However, this method is very expensive.

Ferner ist es auch möglich die Prägelackschicht nur partiell in den gewünschten Bereichen aufzutragen, sodass nur in den mit dem Prägelack beschichteten Bereichen die Prägung erfolgen kann. Dies stellt jedoch hohe Anforderungen an die Präzision der Aufbringung sowohl von Prägelack als auch anschließendem Prägevorgang.Furthermore, it is also possible to apply the embossing lacquer layer only partially in the desired areas, so that embossing can take place only in the areas coated with the embossing lacquer. However, this places great demands on the precision of the application of both embossing lacquer and subsequent embossing process.

Zur Sichtbarmachung wird die geprägte Schicht dann entweder vollflächig oder partiell metallisiert. Insbesondere in bei transparenten Trägersubstraten bleiben bei einer partiellen Metallisierung oder einer auf eine vollflächige Metallisierung folgenden partiellen Demetallisierung die Hologrammstrukturen noch leicht sichtbar, was das Erscheinungsbild der partiellen Hologrammstruktur beeinträchtigt.For visualization, the embossed layer is then either fully or partially metallized. Particularly in the case of transparent carrier substrates, in the case of partial metallization or partial demetallization following full-surface metallization, the hologram structures are still easily visible, which impairs the appearance of the partial hologram structure.

Ein solches Verfahren ist aus dem Dokument EP-A-0758587 bekannt.Such a method is from the document EP-A-0758587 known.

Aufgabe der Erfindung war es ein einfaches und flexibles Verfahren zur Herstellung partieller Oberflächenstrukturen bereitzustellen.The object of the invention was to provide a simple and flexible method for producing partial surface structures.

Gegenstand der Erfindung ist daher ein Verfahren zur Herstellung partieller Oberflächenstrukturen, umfassend die Bereitstellung eines Trägersubstrats, Aufbringen eines Prägelacks, Abformung der Prägestruktur in den Prägelack und Aufbringen einer metallischen Schicht, dadurch gekennzeichnet, dass a) nach der vollflächigen Aufbringung des Prägelacks eine vollflächige Abformung der Oberflächenstruktur erfolgt,

  1. b) anschließend ein Überlack partiell aufgebracht wird
  2. c) in einem dritten Schritt eine in einem Lösungsmittel lösliche Farbe partiell registergenau zu dem in Schritt b) aufgebrachten Überlack aufgebracht wird,
  3. d) in einem vierten Schritt eine vollflächige metallische Schicht aufgebracht wird,
  4. e) worauf in einem fünften Schritt die in Schritt c aufgebrachte Farbe zusammen mit der auf dieser Farbe vorhandenen metallischen Schicht durch Einwirkung eines Lösungsmittels, gegebenenfalls kombiniert mit mechanischer Einwirkung, entfernt wird.
The invention therefore provides a process for the production of partial surface structures, comprising the provision of a carrier substrate, application of an embossing lacquer, impression of the embossed structure in the embossing lacquer and applying a metallic layer, characterized in that a) after full-surface application of the embossing lacquer a full-area impression of the surface structure takes place,
  1. b) then a supernatant is applied partially
  2. c) in a third step, a solvent-soluble ink is applied in register in register with the overcoat applied in step b),
  3. d) in a fourth step, a full-surface metallic layer is applied,
  4. e) in a fifth step, the color applied in step c, together with the metallic layer present on this ink, is removed by the action of a solvent, optionally combined with mechanical action.

Als Trägersubstrate kommen beispielsweise Trägerfolien, vorzugsweise flexible transparente Kunststofffolien, beispielsweise aus P1, PP, MOPP, PE, PPS, PEEK, PEK, PEI, 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.The carrier substrates are for example carrier films, preferably flexible transparent plastic films, for example of P1, PP, MOPP, PE, PPS, PEEK, PEK, PEI, PAEK, LCP, PEN, PBT, PET, PA, PC, COC, POM, 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.

Ferner können als Trägersubstrat auch Metallfolien, beispielsweise Al-, 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.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.

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.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, Stapelfaservliese und dergleichen, die gegebenenfalls vemadelt und/oder kalandriert sein können, verwendet werden. Vorzugsweise bestehen solche Gewebe oder Vliese aus Kunststoffen, wie PP, PET, PA, PPS und dergleichen, es können aber auch Gewebe oder Vliese aus natürlichen, gegebenenfalls behandelten Fasem, wie Viskosefasem eingesetzt werden. Die eingesetzten Vliese oder Gewebe weisen ein Flächengewicht von etwa 20 g/m2 bis 500 g/m2 auf. Gegebenenfalls müssen die Vliese oder Gewebe oberflächenbehandelt werden.Furthermore, woven or nonwovens, such as continuous fiber webs, staple fiber webs and the like, which may possibly be needled and / or calendered, can be used as carrier substrates. Preferably, such fabrics or webs of plastics, such as PP, PET, PA, PPS and the like, but it can also be woven or nonwovens of natural, optionally treated fibers, such as Viskosefasem be used. The nonwovens or fabrics used have a weight per unit area of about 20 g / m 2 to 500 g / m 2 . If necessary, the nonwovens or fabrics must be surface-treated.

Anschließend wird Trägersubstrat in einem Beschichtungs- oder Druckverfahren wie beispielsweise einem Walzenauftrags- Lackierverfahren oder einem Siebdruck-, Tiefdruck- oder Flexodruckverfahren mit einem strahlungshärtbaren Lack beschichtet. Ferner werden auf das Trägersubstrat Register- und Steuermarken für die nachfolgenden Bearbeitungsvorgänge aufgebracht.Subsequently, carrier substrate is coated with a radiation-curable lacquer in a coating or printing process such as, for example, a roller coating or a screen printing, gravure or flexographic printing process. Furthermore, register and control marks for the subsequent processing operations are applied to the carrier substrate.

Der strahlungshärtbare Lack kann beispielsweise ein strahlungshärtbares Lacksystem auf Basis eines Polyester-, eines Epoxy- oder Polyurethansystems das 2 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 aktivierbar. Zwischen den Aktivierungswellenlängen der beiden Photoinitiatoren sollte genügend Differenz eingehalten werden, damit nicht eine zu starke Anregung des zweiten Photoinitiators erfolgt, während der erste Photoinitiator 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 contain, for example, a radiation-curable lacquer system based on a polyester, an epoxy or polyurethane system containing 2 or more different photoinitiators known to the person skilled in the art, which can initiate curing of the lacquer system to varying degrees at different wavelengths. Thus, for example, a photoinitiator can be activated at a wavelength of 200 to 400 nm, the second photoinitiator then activatable at a wavelength of 370 to 600 nm. Sufficient difference should be maintained between the activation wavelengths of the two photoinitiators to prevent over-excitation of the second photoinitiator while the first photoinitiator 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.

Die Abformung der Oberflächenstruktur, erfolgt beispielsweise bei kontrollierter Temperatur mittels einer Matrize oder unter Verwendung einer Prägeform in die strahlungshärtbare Lackschicht, die durch Aktivierung des ersten Photoinitiators bis zum Gelpunkt vorgehärtet wurde und zum Zeitpunkt der Abformung sich in diesem Stadium befindet.
Wird ein wasserverdünnbarer strahlungshärtbarer Lack verwendet kann gegebenenfalls eine Vortrocknung vorgeschaltet werden, beispielsweise durch IR-Strahler.The impression of the surface structure, for example, at controlled temperature by means of a die or using a stamping mold in the radiation-curable lacquer layer, which was pre-cured by activation of the first photoinitiator to the gel point and at the time of the impression is at this stage.
If a water-dilutable radiation-curable lacquer is used, it is optionally possible to precede predrying, for example by means of IR radiators.

Die Schichtdicke des aufgebrachten strahlungshärtbaren Lacks kann je nach Anforderung an das Endprodukt und Dicke des Substrats variieren und beträgt im allgemeinen zwischen 0,5 und 50 µm, vorzugsweise zwischen 2 und 10 µm, besonders bevorzugt zwischen 2 und 5 µm.The layer thickness of the applied radiation-curable lacquer can vary depending on the requirements of the end product and thickness of the substrate and is generally between 0.5 and 50 .mu.m, preferably between 2 and 10 .mu.m, more preferably between 2 and 5 .mu.m.

Auf diese geprägte Struktur wird nun in jenen Bereichen in denen die Prägestruktur im Endprodukt nicht in Erscheinung treten soll ein Überlack aufgebracht.
Dadurch wird die Oberflächenstruktur in den Bereichen des Lackauftrags nivelliert.
Als Überlack kommen beispielweise polymere Lackzusammensetzungen in Frage.In this embossed structure is now applied in those areas where the embossed structure should not appear in the final product a topcoat.
As a result, the surface structure is leveled in the areas of the paint application.
As overcoat, for example, polymeric coating compositions come into question.

Die Aufbringung des Überlacks erfolgt vorzugsweise mittels eines sogenannten Insetterverfahrens, vorzugsweise in einem Tiefdruckverfahren, wobei die mit Registermarken und Steuerlinien versehene Materialbahn über eine vorgelagerte Messeinrichtung zwischen zwei oder mehreren Registermarken der Länge nach vermessen wird und anschließend die Materialbahn von einem Regelkreis, insbesondere einen Registerregler über eine Registerwalze vor dem Druckwerk registergenau eingesteuert wird, wobei das Seitenregister über eine Bahnsteuerung vorgesteuert und über einen Schwenkrahmen eingesteuert wird, und die Materialbahn mit dem Überlack passer- und registergenau bedruckt wird.The application of the overcoat is preferably carried out by means of a so-called insetter method, preferably in a gravure printing process, wherein the provided with register marks and control lines web is measured over an upstream measuring device between two or more register marks in length and then the material web of a control loop, in particular a register over a register roller is controlled in register before the printing unit, wherein the page register on a web control is pre-controlled and controlled by a swing frame, and the material web is printed register and registration register with the topcoat.

Anschließend wird in Schritt c eine in einem Lösungsmittel lösliche Farbe oder ein Farblack mittels eines Insetterverfahrens vorzugsweise in einem Tiefdruckverfahren deckungsgleich zu der Bedruckung mit dem Übedack aufgebracht.Subsequently, in step c, a solvent-soluble ink or color coat is applied by means of an inset process, preferably in a gravure printing process, congruently with the printing with the overdack.

Die verwendete Farbe bzw. der verwendete Farblack ist in einem Lösungsmittel, vorzugsweise in Wasser löslich, es kann jedoch auch eine in jedem beliebigen Lösungsmittel, beispielsweise in Alkohol, Estem und dergleichen lösliche Farbe verwendet werden. Die Farbe bzw. der Farblack können übliche Zusammensetzungen auf Basis von natürlichen oder künstlichen Makromolekülen sein. Die lösliche Farbe kann pigmentiert oder nicht pigmentiert sein. Als Pigmente können alle bekannten Pigmente verwendet werden. Besonders geeignet sind TiO2, ZnS, Kaolin und dergleichenThe ink or lacquer used is soluble in a solvent, preferably water, but it is also possible to use a dye soluble in any solvent, for example in alcohol, esters and the like. The color or the colored lacquer can be customary compositions based on natural or artificial macromolecules. The soluble color may be pigmented or unpigmented. As pigments, all known pigments can be used. Particularly suitable are TiO 2 , ZnS, kaolin and the like

Gegebenenfalls kann das bedruckte Trägersubstrat mittels eines Inline-Plasma-(Niederdruck- oder Atmosphärenplasma-), Corona- oder Flammprozesses behandelt werden. Dadurch wird die Haftung von Metallen und dergleichen an der Oberfläche verbessert.Optionally, the printed carrier substrate may be treated by means of an inline plasma (low pressure or atmospheric plasma), corona or flame process. This improves the adhesion of metals and the like to the surface.

Gegebenenfalls kann gleichzeitig mit der Anwendung der Plasma- bzw. Corona- oder Flammbehandlung eine dünne Metall- oder Metalloxidschicht als Haftvermittler, beispielsweise durch Sputtern oder Aufdampfen aufgebracht werden. Besonders geeignet sind dabei Cr, Al, Ag, Ti, Cu, TiO2, Si-Oxide oder Chromoxide. Diese Haftvermittlerschicht weist im allgemeinen eine Dicke von 0,1 nm - 5nm, vorzugsweise 0,2 nm - 2nm, besonders bevorzugt 0,2 bis 1 nm auf.Optionally, simultaneously with the application of the plasma or corona or flame treatment, a thin metal or metal oxide layer can be applied as adhesion promoter, for example by sputtering or vapor deposition. Particularly suitable are Cr, Al, Ag, Ti, Cu, TiO 2 , Si oxides or chromium oxides. This adhesion promoter layer generally has a thickness of 0.1 nm to 5 nm, preferably 0.2 nm to 2 nm, particularly preferably 0.2 to 1 nm.

Dadurch wird die Haftung der metallischen Schicht weiter verbessert.This further improves the adhesion of the metallic layer.

Anschließend wird die eigentliche metallische Schicht aufgebracht. Diese Schicht besteht aus einem Metall, einer Metallverbindung oder einer Legierung mit geeigneten Reflexionseigenschaften, Als Metallschicht sind Schichten aus Al, Cu, Fe, Ag, Au, Cr, Ni, Zn und dergleichen geeignet. Als Metallverbindungen sind beispielsweise Oxide oder Sulfide von Metallen, insbesondere TiO2, Cr-Oxide, ZnS, ITO, ATO, FTO, ZnO, oder Al2O3 geeignet. Geeignete Legierungen sind beispielsweise Cu-Al Legierungen, Cu-Zn Legierungen und dergleichen.Subsequently, the actual metallic layer is applied. This layer consists of a metal, a metal compound or an alloy with suitable reflection properties. As the metal layer, layers of Al, Cu, Fe, Ag, Au, Cr, Ni, Zn and the like are suitable. Examples of suitable metal compounds are oxides or sulfides of metals, in particular TiO 2 , Cr oxides, ZnS, ITO, ATO, FTO, ZnO, or Al 2 O 3 . Suitable alloys are, for example, Cu-Al alloys, Cu-Zn alloys and the like.

Diese metallische Schicht kann durch bekannte Verfahren, beispielsweise durch Bedampfen, Sputtern, Drucken (Tief-, Flexo-, Sieb-, Digitaldruck und dergleichen), Sprühen, Galvanisieren und dergleichen aufgebracht werden.This metallic layer can be applied by known methods such as sputtering, sputtering, printing (gravure, flexographic, screen, digital printing and the like), spraying, electroplating and the like.

Das erfindungsgemäße Verfahren zur Herstellung partieller Oberflächenstrukturen ist wirtschaftlich und flexibel durchführbar. Bei Aufbringung des Überlacks und der Waschfarbe in beispielsweise einem Tiefdruckverfahren werden für die Aufbringung der beiden Schichten motividente Zylinder benötigt.The process according to the invention for producing partial surface structures can be carried out economically and flexibly. When applying the overcoat and the wash ink in, for example, a gravure printing method, motivident cylinders are required for the application of the two layers.

Die erfindungsgemäß hergestellten Trägersubstrate können ggf. nach Konfektionierung insbesondere als Sicherheitselemente, insbesondere in Wertdokumenten und Datenträgem, beispielsweise Banknoten, Wertpapieren, Ausweisdokumenten, Karten und dergleichen verwendet oder als Sicherheitselemente oder Sicherheitsetiketten in Verpackungen, Textilien, Siegeln und dergleichen verwendet werden.The carrier substrates produced according to the invention may optionally be used after packaging as security elements, in particular in value documents and data carriers, for example banknotes, securities, identity documents, cards and the like, or used as security elements or security labels in packaging, textiles, seals and the like.

Claims (4)

  1. Method for producing partial surface structures, comprising the provision of a carrier substrate, application of an embossing coating, impression of the embossing structure into the embossing coating and application of a metallic layer, characterized in that
    a) after the whole-area application of the embossing coating, whole-area impression of the embossing structure is effected,
    b) an overcoating is subsequently applied partially,
    c) in a third step, an ink that is soluble in a solvent is applied partially with register accuracy with respect to the overcoating applied in step b),
    d) in a fourth step, a whole-area metallic area is applied,
    e) whereupon in a fifth step, the ink applied in step c) together with the metallic layer present on said ink is removed by the action of a solvent, if appropriate combined with mechanical action.
  2. Method according to Claim 1, characterized in that a polymeric coating composition is used as the overcoating.
  3. Method according to either of Claims 1 and 2, characterized in that the embossing structure is levelled by application of the overcoating in these regions.
  4. Method according to one of Claims 1 to 3, characterized in that the application of the layers is effected by means of an insetter method.
EP05004401A 2005-03-01 2005-03-01 Method for making partial surface structures for security devices Not-in-force EP1698486B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE502005001372T DE502005001372D1 (en) 2005-03-01 2005-03-01 Method for producing partial surface structures for security elements
AT05004401T ATE371545T1 (en) 2005-03-01 2005-03-01 METHOD FOR PRODUCING PARTIAL SURFACE STRUCTURES FOR SECURITY ELEMENTS
EP05004401A EP1698486B1 (en) 2005-03-01 2005-03-01 Method for making partial surface structures for security devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05004401A EP1698486B1 (en) 2005-03-01 2005-03-01 Method for making partial surface structures for security devices

Publications (2)

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EP1698486A1 EP1698486A1 (en) 2006-09-06
EP1698486B1 true EP1698486B1 (en) 2007-08-29

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Application Number Title Priority Date Filing Date
EP05004401A Not-in-force EP1698486B1 (en) 2005-03-01 2005-03-01 Method for making partial surface structures for security devices

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EP (1) EP1698486B1 (en)
AT (1) ATE371545T1 (en)
DE (1) DE502005001372D1 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3650027T2 (en) * 1985-05-07 1995-01-26 Dainippon Printing Co Ltd Item with transparent hologram.
EP0537439B2 (en) * 1991-10-14 2003-07-09 OVD Kinegram AG Security element
DE4411404B4 (en) * 1994-03-31 2009-07-30 Giesecke & Devrient Gmbh Layer composite for transferring optically variable individual elements to be secured objects, security document and a method for producing a composite layer
CH690067A5 (en) * 1995-08-10 2000-04-14 Ovd Kinegram Ag A process for preparing teilmetallisierter lattice structures.

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Publication number Publication date
EP1698486A1 (en) 2006-09-06
ATE371545T1 (en) 2007-09-15
DE502005001372D1 (en) 2007-10-11

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