EP1932680A1 - Conductive hologram films - Google Patents

Conductive hologram films Download PDF

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Publication number
EP1932680A1
EP1932680A1 EP06025632A EP06025632A EP1932680A1 EP 1932680 A1 EP1932680 A1 EP 1932680A1 EP 06025632 A EP06025632 A EP 06025632A EP 06025632 A EP06025632 A EP 06025632A EP 1932680 A1 EP1932680 A1 EP 1932680A1
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EP
European Patent Office
Prior art keywords
electrostatically
radiation
diffraction
counterfeit
proof
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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.)
Granted
Application number
EP06025632A
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German (de)
French (fr)
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EP1932680B1 (en
Inventor
Jürgen Dr. Keplinger
Thomas Dipl.-Htl-Ing. Lindmeir
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Hueck Folien GmbH
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Hueck Folien GmbH
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Priority to EP20060025632 priority Critical patent/EP1932680B1/en
Publication of EP1932680A1 publication Critical patent/EP1932680A1/en
Application granted granted Critical
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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
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/328—Diffraction gratings; Holograms

Definitions

  • the invention relates to carrier substrates which have a diffraction-optical structure and can be applied to magnetic coatings or magnetic tapes or magnetic tracks.
  • Structures that are effective in terms of optical diffraction such as holograms, diffraction gratings, kinegrams and the like, are used as forgery-proof security features both for value documents such as banknotes, securities, credit cards and ID cards, but also for product protection.
  • the holograms can be applied to the substrate of the documents of value or on packaging films, usually adhesive coatings are used.
  • a document of value which has a security element with a magnetic coating and a diffractive optical effective layer, the diffractive optical effective layer with a non-magnetizable metal layer of Cr, Cu, Ag, Au or alloys of at least two of these metals.
  • a barrier layer is arranged which prevents the action of the magnetizable particles on the metal layer, this barrier layer being formed from organic polymers to which inorganic pigments have been added. By this barrier layer obviously the corrosion should be prevented.
  • the electrostatic charge of the diffraction-optical structure is not prevented.
  • the object of the invention was to provide a visible tamper-proof security element, in particular for smart cards, identity cards or documents of value, which have a magnetic coating in which data is stored or which has a coding, which can be applied to this coating, and which detects the detection Data or the properties of the magnetic coating is not affected.
  • the invention is therefore an anti-counterfeit security element comprising a structure having a diffraction-optical structure, which can be applied to the magnetic coating or which has a magnetic coating, characterized in that the diffraction-optically active structure is introduced into a radiation-curable lacquer layer provided with electrostatically acting substances the surface is electrostatically equipped.
  • Another object of the invention is a forgery-proof document of value or a package comprising on a support a magnetic coating and a diffraction-optically effective structure, which is applied to the magnetic coating, characterized in that the diffraction-optically active structure in a provided with electrostatic substances radiation-curable lacquer layer is introduced, whereby the surface is electrostatically equipped.
  • a carrier for the forgery-proof document of value (such as smart card, ID cards and the like) are, for example, flexible, semi-rigid or rigid carrier films or composites, preferably plastic films, for example, PI, PP, OPP, PE, PPS, PEEK, PEK, PEI, PSU, PAEK, LCP, PEN, PBT, PET, PA, PC, COC, POM, ABS, PVC fluoropolymers such as Teflon and the like or composites between different or similar carrier films in question.
  • the carrier films preferably have a thickness of 5 - 700 microns.
  • several identical or different carrier foils can also form a layer structure or a composite.
  • 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 10 to 40 ⁇ m, may serve as the carrier substrate.
  • the films can also be surface-treated, coated or laminated, for example with plastics or varnished.
  • paper or composites with paper for example composites with plastics, having a weight per unit area of 20 to 500 g / m 2 , preferably 40 to 200 g / m 2 , may also be used as the carrier substrates.
  • nonwovens such as continuous fiber webs, staple fiber webs and the like, which may optionally be needled or calendered, can be used as carrier substrates.
  • nonwovens consist of plastics, such as PP, PET, PA, PPS and the like, but it is also possible to use nonwovens of natural, optionally treated fibers, such as viscose fiber webs.
  • the nonwovens used have a basis weight of about 20 g / m 2 to 500 g / m 2 .
  • the magnetic coating of the document of value, smart card, badge or package may consist of paramagnetic, diamagnetic and also ferromagnetic materials dispersed or embedded in a binder such as iron, nickel and cobalt or their compounds or salts (for example oxides or sulfides).
  • the pigments are dispersed in an aqueous or solvent-containing acrylate polymer dispersion (having a MW of 150,000-300,000) or in an acrylate-styrene or acrylate-urethane polymer dispersion.
  • Suitable solvents include water, alcohols such as i-propanol, or methoxypropanol, esters such as ethyl acetate, ketones such as methyl ethyl ketone and mixtures thereof.
  • the magnetic coating can be carried out by any known coating method, for example by spin coating, brushing, vapor deposition, by printing (gravure printing, flexographic printing, screen printing, offset printing, digital printing and the like) by spraying, sputtering or roller coating techniques.
  • the magnetic coating is not applied over the entire surface of the support, but in the form of a strip, a band or in a limited area.
  • the inventive security element, the diffraction-optically effective structure according to the invention can be applied to this magnetic coating.
  • the diffraction-optical structure according to the invention is introduced into a radiation-curable, preferably UV-curable lacquer which contains additives which electrostatically equip the surface of the lacquer.
  • a carrier substrate is initially included in a coating process such as, for example, a screen printing, intaglio or flexographic printing process coated a radiation-curable varnish.
  • the coating can be selective or full-surface.
  • the carrier substrate used is, for example, flexible plastic films, for example of PI, PP, OPP, PE, PEP, PEEK, PEK, PEI, PAEK, LCP, PEN, PBT, PET, PA, PC, COC, POM, ABS, PVC, PTFE, fluoropolymers such as Teflon, PVB, etc. 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.
  • the radiation-curable lacquer can be, for example, a radiation-curable lacquer system based on a polyester, an epoxy or polyurethane system which contains one or more different photoinitiators known to the person skilled in the art, which can optionally 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. Furthermore, the paint contains additives that electrostatically equip the surface.
  • the surface resistance is preferably ⁇ 10 11 ⁇ / sq.
  • Suitable additives are, for example, quaternary ammonium salts, ITO (indium tin oxide), metal ions or metal complexes based on Li, Ag, Cu.
  • the lacquer layer contains 1 to 15% by weight, preferably 2 to 10% by weight, of this additive.
  • the impression of the surface structure ie the diffraction, diffraction or relief structure, for example, at a controlled temperature by means of a die or using a stamping die in the radiation-curable lacquer layer.
  • the lacquer layer may be pre-cured by activating the first photoinitiator to the gel point and at this stage at the time of the impression. If a water-dilutable radiation-curable lacquer is used, pre-drying may optionally be preceded, for example by IR emitters.
  • the layer thickness of the applied radiation-curable lacquer may 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 microns.
  • the structure After the curing of the paint, which can be carried out in a conventional manner in one or more stages by electron radiation, UV radiation or thermal, the structure may be provided with a metallic coating.
  • metal layer layers of Al, Cu, Fe, Ag, Au, Cr, Ni, Zn, Sn or bimetallic alloys and the like are suitable.
  • This functional layer can be applied over the entire surface by known methods, for example by vapor deposition, sputtering, printing (gravure, flexo, screen, digital printing and the like), spraying, electroplating and the like.
  • the thickness of the functional layer is 0.001 to 50 ⁇ m, preferably 0.1 to 20 ⁇ m.
  • this layer can also be applied partially, by partial metallization, whereby the partial application can take place by means of an etching process (application of a full-area metal layer and subsequent partial removal by etching or laser ablation) or by means of a demetallization process.
  • etching process application of a full-area metal layer and subsequent partial removal by etching or laser ablation
  • demetallization process a solvent-soluble paint is partially applied in a first step, followed by a full-area metallic layer, which is subsequently removed in the area of the soluble paint by means of a washing process.
  • the diffraction-optically effective structure bearing support film may be provided with protective lacquer layers and adhesive layers.
  • This diffraction-optically effective structure can be applied over the entire surface or partially directly onto the magnetic coating of the carrier. This not only improves the appearance of the magnetic coating or the carrier having this coating, but also provides an additional security feature. Due to the electrostatic equipment of the, the diffraction-optically effective structure bearing resist layer data stored on the magnetic coating data or codes can be read easily. The appearance, as well as the mechanical, physical and chemical properties and resistances of the diffractive optical effective layer are not affected.
  • the magnetic coating can not be applied to the support of the value document, the smart card, etc. or the packaging, but directly to the structure which has an optical diffraction effect and then to the support of the value document, the smartcard, etc. or the packaging be transferred.
  • the security features according to the invention where appropriate after appropriate fabrication (for example into threads, strips, patches or other formats), can therefore be used as security elements on data carriers, in particular value documents such as identity cards, cards, banknotes or labels, seals and the like, but also in packaging material for sensitive goods. such as pharmaceuticals, cosmetics, data carriers, electronic components and the like.

Abstract

Tamper-proof safety element has an optical diffraction effective structure and is applied on the magnetic coating. The optical diffraction active structure is brought into a radiation-hardened varnish layer. The varnish layer is provided with electrostatic effective substances at the surface. The electrostatic effective substances are quaternary ammonium salts, indium tin oxide, metal ions or metal complexes on lithium, silver or copper base. The radiation hardened varnish layer is assembled on base of polyester-,epoxy- or polyurethane systems and contains one or multiple photoinitators.

Description

Die Erfindung betrifft Trägersubstrate, die eine beugungsoptische Struktur aufweisen und auf magnetische Beschichtungen bzw. Magnetbänder oder Magnetspuren aufgebracht werden können.The invention relates to carrier substrates which have a diffraction-optical structure and can be applied to magnetic coatings or magnetic tapes or magnetic tracks.

Beugungsoptisch wirksame Strukturen, wie Hologramme, Beugungsgitter, Kinegramme und dergleichen werden als fälschungssichere Sicherheitsmerkmale sowohl für Wertdokumente, wie Banknoten, Wertpapiere, Kredit- und Ausweiskarten, aber auch zum Produktschutz eingesetzt.Structures that are effective in terms of optical diffraction, such as holograms, diffraction gratings, kinegrams and the like, are used as forgery-proof security features both for value documents such as banknotes, securities, credit cards and ID cards, but also for product protection.

Die Hologramme können dabei auf das Substrat der Wertdokumente oder auf Verpackungsfolien appliziert werden, wobei üblicherweise Klebebeschichtungen zum Einsatz kommen.The holograms can be applied to the substrate of the documents of value or on packaging films, usually adhesive coatings are used.

Allerdings ist es bisher nicht möglich beugungsoptisch wirksame Strukturen auf magnetische Beschichtungen dieser Substrate aufzubringen, da die auf der magnetischen Beschichtung gespeicherten Daten durch die Störung des Lesegeräts durch die elektrostatische Aufladung der beugungsoptisch wirksamen Struktur dann nicht mehr ausgelesen werden können und sogar das Lesegerät (der Lesekopf) beschädigt werden kann.However, it is not yet possible to apply diffraction-optically effective structures to magnetic coatings of these substrates, since the data stored on the magnetic coating can no longer be read out by the disturbance of the reading device due to the electrostatic charge of the structure that is effective for diffraction, and even the reading device (the reading head ) can be damaged.

Aus der DE 42 12 290 C1 ist ein Wertdokument bekannt, das ein Sicherheitselement mit einer magnetischen Beschichtung und einer beugungsoptisch wirksamen Schicht aufweist, wobei die beugungsoptisch wirksame Schicht mit einer nicht magnetisierbaren Metallschicht aus Cr, Cu, Ag, Au oder Legierungen aus mindestens zweien dieser Metalle besteht. Zwischen der magnetischen Schicht und der metallischen Schicht ist eine Barriereschicht angeordnet, die die Einwirkung der magnetisierbaren Teilchen auf die Metallschicht verhindert, wobei diese Barriereschicht aus organischen Polymeren gebildet ist, denen anorganische Pigmente beigemengt sind. Durch diese Barriereschicht soll offensichtlich die Korrosion verhindert werden.From the DE 42 12 290 C1 is a document of value is known, which has a security element with a magnetic coating and a diffractive optical effective layer, the diffractive optical effective layer with a non-magnetizable metal layer of Cr, Cu, Ag, Au or alloys of at least two of these metals. Between the magnetic layer and the metallic layer, a barrier layer is arranged which prevents the action of the magnetizable particles on the metal layer, this barrier layer being formed from organic polymers to which inorganic pigments have been added. By this barrier layer obviously the corrosion should be prevented.

Die elektrostatische Aufladung der beugungsoptischen Struktur wird dadurch nicht verhindert.The electrostatic charge of the diffraction-optical structure is not prevented.

Aufgabe der Erfindung war es, ein sichtbares fälschungssicheres Sicherheitselement insbesondere für Smartcards, Ausweise oder Wertdokumente, die eine magnetische Beschichtung aufweisen, in der Daten gespeichert sind oder die eine Codierung aufweist, bereitzustellen, das auf diese Beschichtung aufgebracht werden kann, und das die Detektion der Daten oder der Eigenschaften der magnetischen Beschichtung nicht beeinflusst.The object of the invention was to provide a visible tamper-proof security element, in particular for smart cards, identity cards or documents of value, which have a magnetic coating in which data is stored or which has a coding, which can be applied to this coating, and which detects the detection Data or the properties of the magnetic coating is not affected.

Gegenstand der Erfindung ist daher ein fälschungssicheres Sicherheitselement aufweisend eine beugungsoptisch wirksame Struktur, die auf der magnetischen Beschichtung aufgebracht werden kann oder die eine magnetische Beschichtung aufweist, dadurch gekennzeichnet, dass die beugungsoptisch aktive Struktur in eine mit elektrostatisch wirkenden Substanzen versehene strahlungshärtbare Lackschicht eingebracht ist, wodurch die Oberfläche elektrostatisch ausgerüstet ist.The invention is therefore an anti-counterfeit security element comprising a structure having a diffraction-optical structure, which can be applied to the magnetic coating or which has a magnetic coating, characterized in that the diffraction-optically active structure is introduced into a radiation-curable lacquer layer provided with electrostatically acting substances the surface is electrostatically equipped.

Ein weiterer Gegenstand der Erfindung ist ein fälschungssicheres Wertdokument oder eine Verpackung aufweisend auf einem Träger eine magnetische Beschichtung und eine beugungsoptisch wirksame Struktur, die auf der magnetischen Beschichtung aufgebracht ist, dadurch gekennzeichnet, dass die beugungsoptisch aktive Struktur in eine mit elektrostatisch wirkenden Substanzen versehene strahlungshärtbare Lackschicht eingebracht ist, wodurch deren Oberfläche elektrostatisch ausgerüstet ist.Another object of the invention is a forgery-proof document of value or a package comprising on a support a magnetic coating and a diffraction-optically effective structure, which is applied to the magnetic coating, characterized in that the diffraction-optically active structure in a provided with electrostatic substances radiation-curable lacquer layer is introduced, whereby the surface is electrostatically equipped.

Als Träger für das fälschungssichere Wertdokument, (wie Smartcard, Ausweise und dergleichen) oder die Verpackung kommen beispielsweise flexible, halbstarre oder starre Trägerfolien oder Verbunde, vorzugsweise Kunststofffolien, beispielsweise aus PI, PP, OPP, PE, PPS, PEEK, PEK, PEI, PSU, PAEK, LCP, PEN, PBT, PET, PA, PC, COC, POM, ABS, PVC Fluorpolymere wie Teflon und dergleichen oder Verbunde zwischen unterschiedlichen oder gleichartigen Trägerfolien in Frage. Die Trägerfolien weisen vorzugsweise eine Dicke von 5 - 700 µm auf.
Für Smartcards können auch mehrere gleiche oder unterschiedliche dieser Trägerfolien einen Schichtaufbau bzw. einen Verbund bilden.
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 10 - 40 µm dienen. Die Folien können auch oberflächenbehandelt, beschichtet oder kaschiert, beispielsweise mit Kunststoffen oder lackiert sein.As a carrier for the forgery-proof document of value, (such as smart card, ID cards and the like) are, for example, flexible, semi-rigid or rigid carrier films or composites, preferably plastic films, for example, PI, PP, OPP, PE, PPS, PEEK, PEK, PEI, PSU, PAEK, LCP, PEN, PBT, PET, PA, PC, COC, POM, ABS, PVC fluoropolymers such as Teflon and the like or composites between different or similar carrier films in question. The carrier films preferably have a thickness of 5 - 700 microns.
For smart cards, several identical or different carrier foils can also form a layer structure or a composite.
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 10 to 40 μm, may serve as the carrier substrate. The films can also be surface-treated, coated or laminated, for example with plastics or varnished.

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.Furthermore, paper or composites with paper, for example composites with plastics, having a weight per unit area of 20 to 500 g / m 2 , preferably 40 to 200 g / m 2 , may also be used as the carrier substrates.

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

Die magnetische Beschichtung des Wertdokuments, der Smartcard, des Ausweises oder der Verpackung kann aus in einem Bindemittel dispergierten oder eingebetteten paramagnetischen, diamagnetischen und auch ferromagnetischen Stoffen, wie Eisen, Nickel und Cobalt oder deren Verbindungen oder Salze (beispielsweise Oxide oder Sulfide) bestehen.The magnetic coating of the document of value, smart card, badge or package may consist of paramagnetic, diamagnetic and also ferromagnetic materials dispersed or embedded in a binder such as iron, nickel and cobalt or their compounds or salts (for example oxides or sulfides).

Besonders ist zur Einstellung der magnetischen Eigenschaften eine Magnetpigmentfarbe auf Basis von oxidischen Pigmenten wie beispielsweise Fe2O3 oder Fe3O4, Metallpigmenten wie Eisen, Nickel, Cobalt oder Chrom und/oder deren Legierungen, z.B.: Cr-Ni-Stahl (Edelstahl), Barium- bzw. Cobalt-Ferrite oder ähnliche, geeignet.
Diese Pigmente können hart- oder weichmagnetisch sein.Particularly, for adjusting the magnetic properties, a magnetic pigment ink based on oxide pigments such as Fe 2 O 3 or Fe 3 O 4 , metal pigments such as iron, nickel, cobalt or chromium and / or their alloys, for example: Cr-Ni steel (stainless steel), barium or cobalt ferrites or the like.
These pigments can be hard or soft magnetic.

Vorzugsweise sind die Pigmente in einer wässrigen oder lösungsmittelhaltigen Acrylat-Polymerdispersion (mit einem MG von 150.000 - 300.000) bzw. in einer Acrylat-Styrol- oder Acrylat-Urethan-Polymerdispersion dispergiert sein. Als Lösungsmittel kommen dabei Wasser, Alkohole, wie i-Propanol, oder Methoxypropanol, Ester wie Ethylacetat, Ketone wie Methylethylketon und deren Mischungen in Frage.Preferably, the pigments are dispersed in an aqueous or solvent-containing acrylate polymer dispersion (having a MW of 150,000-300,000) or in an acrylate-styrene or acrylate-urethane polymer dispersion. Suitable solvents include water, alcohols such as i-propanol, or methoxypropanol, esters such as ethyl acetate, ketones such as methyl ethyl ketone and mixtures thereof.

Die magnetische Beschichtung kann in jedem bekannten Beschichtungsverfahren, beispielsweise durch Spin-Coating, Aufstreichen, Aufdampfen, durch Drucken, (Tiefdruck, Flexodruck, Siebdruck, Offsetdruck, Digitaldruck und dergleichen) durch Aufsprühen, Sputtern oder Walzenauftragstechniken erfolgen.
Vorzugsweise wird die magnetische Beschichtung nicht vollflächig auf den Träger aufgebracht, sondern in Form eines Streifen, eines Bandes oder in einem begrenzten Bereich.The magnetic coating can be carried out by any known coating method, for example by spin coating, brushing, vapor deposition, by printing (gravure printing, flexographic printing, screen printing, offset printing, digital printing and the like) by spraying, sputtering or roller coating techniques.
Preferably, the magnetic coating is not applied over the entire surface of the support, but in the form of a strip, a band or in a limited area.

Auf diese magnetische Beschichtung kann das erfindungsgemäße Sicherheitselement, die erfindungsgemäße beugungsoptisch wirksame Struktur aufgebracht werden.The inventive security element, the diffraction-optically effective structure according to the invention can be applied to this magnetic coating.

Die erfindungsgemäße beugungsoptische Struktur ist in einen strahlungshärtbaren, vorzugsweise UV-härtbaren Lack eingebracht, der Additve enthält, die die Oberfläche des Lacks elektrostatisch ausrüsten.The diffraction-optical structure according to the invention is introduced into a radiation-curable, preferably UV-curable lacquer which contains additives which electrostatically equip the surface of the lacquer.

Zur Herstellung der erfindungsgemäßen beugungsoptisch wirksamen Struktur wird vorerst ein Trägersubstrat in einem Beschichtungsverfahren wie beispielsweise einem Siebdruck-, Tiefdruck- oder Flexodruckverfahren mit einem strahlungshärtbaren Lack beschichtet. Die Beschichtung kann selektiv oder vollflächig erfolgen.For the production of the structure according to the invention which has an optical diffraction effect, a carrier substrate is initially included in a coating process such as, for example, a screen printing, intaglio or flexographic printing process coated a radiation-curable varnish. The coating can be selective or full-surface.

Als Trägersubstrat kommen beispielsweise flexible Kunststofffolien, beispielsweise aus PI, PP, OPP, PE, PPS, PEEK, PEK, PEI, PAEK, LCP, PEN, PBT, PET, PA, PC, COC, POM, ABS, PVC, PTFE, Fluorpolymere wie Teflon, PVB etc. in Frage.
Die Trägerfolien weisen vorzugsweise eine Dicke von 5 - 700 µm, bevorzugt 5 - 200 µm, besonders bevorzugt 5 - 50 µm auf.The carrier substrate used is, for example, flexible plastic films, for example of PI, PP, OPP, PE, PEP, PEEK, PEK, PEI, PAEK, LCP, PEN, PBT, PET, PA, PC, COC, POM, ABS, PVC, PTFE, fluoropolymers such as Teflon, PVB, etc. 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.

Der strahlungshärtbare Lack kann beispielsweise ein strahlungshärtbares Lacksystem auf Basis eines Polyester-, eines Epoxy- oder Polyurethansystems das einen oder mehrere verschiedene, dem Fachmann geläufige Photoinitiatoren enthält, die gegebenenfalls 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 be, for example, a radiation-curable lacquer system based on a polyester, an epoxy or polyurethane system which contains one or more different photoinitiators known to the person skilled in the art, which can optionally 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.
Ferner enthält der Lack Additive, die die Oberfläche elektrostatisch ausrüsten.As a radiation-curable varnish, a water-thinnable varnish can also be used. Preference is given to polyester-based paint systems.
Furthermore, the paint contains additives that electrostatically equip the surface.

Dabei beträgt der Oberflächenwiderstand vorzugsweise < 1011 Ω/sq.
Geeignete Additive sind beispielsweise quartäre Ammoniumsalze, ITO (Indium-Zinn-oxid), Metallionen oder Metallkomplexe auf Li, Ag, Cu-Basis.The surface resistance is preferably <10 11 Ω / sq.
Suitable additives are, for example, quaternary ammonium salts, ITO (indium tin oxide), metal ions or metal complexes based on Li, Ag, Cu.

Je nach verwendetem Additiv enthält die Lackschicht 1 - 15 Gew%, vorzugsweise 2 -10 Gew%, dieses Additivs.Depending on the additive used, the lacquer layer contains 1 to 15% by weight, preferably 2 to 10% by weight, of this additive.

Die Abformung der Oberflächenstruktur, also der Diffraktions-, Beugungs- oder Reliefstruktur erfolgt beispielsweise bei kontrollierter Temperatur mittels einer Matrize oder unter Verwendung einer Prägeform in die strahlungshärtbare Lackschicht. Gegebenenfalls kann die Lackschicht durch Aktivierung des ersten Photoinitiators bis zum Gelpunkt vorgehärtet sein und sich zum Zeitpunkt der Abformung in diesem Stadium befinden.
Wird ein wasserverdünnbarer strahlungshärtbarer Lack verwendet, kann gegebenenfalls eine Vortrocknung vorgeschaltet werden, beispielsweise durch IR-Strahler.The impression of the surface structure, ie the diffraction, diffraction or relief structure, for example, at a controlled temperature by means of a die or using a stamping die in the radiation-curable lacquer layer. Optionally, the lacquer layer may be pre-cured by activating the first photoinitiator to the gel point and at this stage at the time of the impression.
If a water-dilutable radiation-curable lacquer is used, pre-drying may optionally be preceded, for example by IR emitters.

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 may 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 microns.

Nach der Aushärtung des Lacks, die auf übliche Weise in einer oder mehreren Stufen durch Elektronenstrahlung, UV- Strahlung oder thermisch erfolgen kann, kann die Struktur mit einer metallischen Beschichtung versehen werden.After the curing of the paint, which can be carried out in a conventional manner in one or more stages by electron radiation, UV radiation or thermal, the structure may be provided with a metallic coating.

Als Metallschicht sind Schichten aus Al, Cu, Fe, Ag, Au, Cr, Ni, Zn, Sn oder Bimetall-Legierungen und dergleichen geeignet.As the metal layer, layers of Al, Cu, Fe, Ag, Au, Cr, Ni, Zn, Sn or bimetallic alloys and the like are suitable.

Diese funktionelle Schicht kann vollflächig durch bekannte Verfahren, beispielsweise durch Bedampfen, Sputtern, Drucken (Tief-, Flexo-, Sieb-, Digitaldruck und dergleichen), Sprühen, Galvanisieren und dergleichen aufgebracht werden. Die Dicke der funktionellen Schicht beträgt 0,001 bis 50 µm, vorzugsweise 0,1 bis 20 µm.This functional layer can be applied over the entire surface by known methods, for example by vapor deposition, sputtering, printing (gravure, flexo, screen, digital printing and the like), spraying, electroplating and the like. The thickness of the functional layer is 0.001 to 50 μm, preferably 0.1 to 20 μm.

Ferner kann diese Schicht auch partiell, durch partielle Metallisierung aufgebracht werden, wobei die partielle Aufbringung mittels eines Ätzverfahrens (Aufbringung einer vollflächigen Metallschicht und anschließende partielle Entfernung durch Ätzen oder durch Laserabtragung) oder mittels eines Demetallisierungsverfahrens erfolgen kann.
Bei Verwendung eines Demetallisierungsverfahrens wird in einem ersten Schritt partiell eine in einem Lösungsmittel lösliche Farbe aufgebracht, anschließend eine vollflächige metallische Schicht, die anschließend im Bereich der löslichen Farbe mittels eines Waschverfahrens abgelöst wird.Furthermore, this layer can also be applied partially, by partial metallization, whereby the partial application can take place by means of an etching process (application of a full-area metal layer and subsequent partial removal by etching or laser ablation) or by means of a demetallization process.
When using a demetallization process, a solvent-soluble paint is partially applied in a first step, followed by a full-area metallic layer, which is subsequently removed in the area of the soluble paint by means of a washing process.

Ferner kann diese, die beugungsoptisch wirksame Struktur tragende Trägerfolie mit Schutzlackschichten und Klebeschichten versehen sein.Furthermore, this, the diffraction-optically effective structure bearing support film may be provided with protective lacquer layers and adhesive layers.

Diese beugungsoptisch wirksame Struktur kann vollflächig oder partiell direkt auf die magnetische Beschichtung des Trägers aufgebracht werden. Dadurch wird nicht nur das Erscheinungsbild der magnetischen Beschichtung bzw. des diese Beschichtung aufweisenden Trägers verbessert, sondern auch ein zusätzliches Sicherheitsmerkmal bereitgestellt.
Durch die elektrostatische Ausrüstung der, die beugungsoptisch wirksame Struktur tragenden Lackschicht können auch auf der magnetischen Beschichtung gespeicherte Daten oder Codierungen problemlos ausgelesen werden. Das Erscheinungsbild, sowie die mechanischen, physikalischen und chemischen Eigenschaften und Beständigkeiten der beugungsoptisch wirksamen Schicht werden dadurch nicht beeinflusst.This diffraction-optically effective structure can be applied over the entire surface or partially directly onto the magnetic coating of the carrier. This not only improves the appearance of the magnetic coating or the carrier having this coating, but also provides an additional security feature.
Due to the electrostatic equipment of the, the diffraction-optically effective structure bearing resist layer data stored on the magnetic coating data or codes can be read easily. The appearance, as well as the mechanical, physical and chemical properties and resistances of the diffractive optical effective layer are not affected.

In einer weiteren Ausführungsform kann die magnetische Beschichtung nicht auf dem Träger des Wertdokuments, der Smartcard etc. oder der Verpackung aufgebracht sein, sondern direkt auf der beugungsoptisch wirksamen Struktur und mit dieser dann auf den Träger des Wertdokuments, der Smartcard, etc. oder die Verpackung transferiert werden.In a further embodiment, the magnetic coating can not be applied to the support of the value document, the smart card, etc. or the packaging, but directly to the structure which has an optical diffraction effect and then to the support of the value document, the smartcard, etc. or the packaging be transferred.

Die erfindungsgemäßen Sicherheitsmerkmale werden gegebenenfalls nach entsprechender Konfektionierung (beispielsweise zu Fäden, Bändern Streifen, Patches oder anderen Formaten) daher als Sicherheitselemente auf Datenträgern, insbesondere Wertdokumenten wie Ausweisen, Karten, Banknoten oder Etiketten, Siegeln und dergleichen, aber auch in Verpackungsmaterial für sensible Güter, wie Pharmazeutika, Kosmetika, Datenträger, elektronische Bauteile und dergleichen verwendet.The security features according to the invention, where appropriate after appropriate fabrication (for example into threads, strips, patches or other formats), can therefore be used as security elements on data carriers, in particular value documents such as identity cards, cards, banknotes or labels, seals and the like, but also in packaging material for sensitive goods. such as pharmaceuticals, cosmetics, data carriers, electronic components and the like.

Claims (9)

Fälschungssicheres Sicherheitselement aufweisend eine beugungsoptisch wirksame Struktur, die auf der magnetischen Beschichtung aufgebracht werden kann, dadurch gekennzeichnet, dass die beugungsoptisch aktive Struktur in eine mit elektrostatisch wirkenden Substanzen versehene strahlungshärtbare Lackschicht eingebracht ist, wodurch deren Oberfläche elektrostatisch ausgerüstet ist.Anti-counterfeit security element having a structure having a diffraction-optical structure, which can be applied to the magnetic coating, characterized in that the diffraction-optically active structure is incorporated in a radiation-curable lacquer layer provided with electrostatically acting substances, whereby the surface thereof is electrostatically equipped. Fälschungssicheres Sicherheitselement nach Anspruch 1, dadurch gekennzeichnet, dass als elektrostatisch wirksame Substanzen quartäre Ammoniumsalze, ITO (Indium-Zinn-oxid), Metallionen oder Metallkomplexe auf Li, Ag, Au oder Cu-Basis eingebracht sind.Anti-counterfeit security element according to claim 1, characterized in that as electrostatically active substances quaternary ammonium salts, ITO (indium tin oxide), metal ions or metal complexes are introduced on Li, Ag, Au or Cu base. Fälschungssicheres Sicherheitselement nach einem der Ansprüche 1 bis 2, dadurch gekennzeichnet, dass der Anteil der elektrostatisch wirksamen Substanzen 1-15 Gew% beträgt.Anti-counterfeit security element according to one of claims 1 to 2, characterized in that the proportion of electrostatically active substances is 1-15% by weight. Fälschungssicheres Sicherheitselement nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die strahlungshärtbare Lackschicht auf Basis eines Polyester-, eines Epoxy- oder Polyurethansystems aufgebaut ist und einen oder mehrere verschiedene Photoinitiatoren enthält.Anti-counterfeit security element according to one of claims 1 to 3, characterized in that the radiation-curable lacquer layer is based on a polyester, an epoxy or polyurethane system and contains one or more different photoinitiators. Fälschungssicheres Wertdokument oder fälschungssichere Verpackung aufweisend auf einem Träger eine magnetische Beschichtung und eine beugungsoptisch wirksame Struktur, die auf der magnetischen Beschichtung aufgebracht ist, dadurch gekennzeichnet, dass die beugungsoptisch aktive Struktur in eine mit elektrostatisch wirkenden Substanzen versehene strahlungshärtbare Lackschicht eingebracht ist, wodurch deren Oberfläche elektrostatisch ausgerüstet ist.Counterfeit-proof document of value or forgery-proof packaging comprising on a support a magnetic coating and a diffraction-optically active structure, which is applied to the magnetic coating, characterized in that the diffraction-optically active structure is incorporated in a provided with electrostatic substances radiation-curable lacquer layer, whereby their surface electrostatically equipped. Fälschungssicheres Wertdokument nach Anspruch 5, dadurch gekennzeichnet, dass als elektrostatisch wirksame Substanzen quartäre Ammoniumsalze, ITO (Indium-Zinn-oxid), Metallionen oder Metallkomplexe auf Li, Ag, Cu oder Au-Basis eingebracht sind.Counterfeit-proof document of value according to claim 5, characterized in that as electrostatically active substances quaternary ammonium salts, ITO (indium tin oxide), metal ions or metal complexes are introduced on Li, Ag, Cu or Au base. Fälschungssicheres Wertdokument oder fälschungssichere Verpackung nach einem der Ansprüche 5 bis 6, dadurch gekennzeichnet, dass der Anteil der elektrostatisch wirksamen Substanzen 1 - 15 Gew% beträgt.Counterfeit-proof document of value or forgery-proof packaging according to one of Claims 5 to 6, characterized in that the proportion of electrostatically active substances is 1-15% by weight. Fälschungssicheres Wertdokument oder fälschungssichere Verpackung nach einem der Ansprüche 5 bis 7, dadurch gekennzeichnet, dass die strahlungshärtbare Lackschicht auf Basis eines Polyester-, eines Epoxy- oder Polyurethansystems aufgebaut ist und einen oder mehrere verschiedene Photoinitiatoren enthält.Counterfeit-proof value document or forgery-proof packaging according to one of claims 5 to 7, characterized in that the radiation-curable lacquer layer is based on a polyester, an epoxy or polyurethane system and contains one or more different photoinitiators. Fälschungssicheres Wertdokument oder fälschungssichere Verpackung aufweisend auf einem Träger eine beugungsoptisch wirksame Struktur und eine magnetische Beschichtung, dadurch gekennzeichnet, dass die beugungsoptisch aktive Struktur in eine mit elektrostatisch wirkenden Substanzen versehene strahlungshärtbare Lackschicht eingebracht ist, wodurch deren Oberfläche elektrostatisch ausgerüstet ist und auf der beugungsoptisch wirksamen Struktur eine magnetische Beschichtung aufgebracht ist.Counterfeit-proof document of value or forgery-proof packaging comprising on a support a diffraction-optically active structure and a magnetic coating, characterized in that the diffractive optical active structure is incorporated in a provided with electrostatic substances radiation-curable lacquer layer, whereby the surface is electrostatically equipped and on the structure diffractive optical effective a magnetic coating is applied.
EP20060025632 2006-12-12 2006-12-12 Conductive hologram films Not-in-force EP1932680B1 (en)

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4684795A (en) * 1985-01-07 1987-08-04 United States Banknote Company L.P. Security tape with integrated hologram and magnetic strip
DE4212290C1 (en) 1992-02-29 1993-05-27 Leonhard Kurz Gmbh & Co, 8510 Fuerth, De Security element for e.g. credit card, identity card - consists of magnetic layer with dispersed magnetisable particles and security later for diffracted light e.g. hologram of computer generated diffraction structure
WO1993012506A1 (en) * 1991-12-19 1993-06-24 Control Module Inc. Secure optomagnetic identification
US5336871A (en) * 1992-02-07 1994-08-09 American Bank Note Holographics, Incorporated Holographic enhancement of card security
EP0609806A2 (en) * 1993-02-02 1994-08-10 Dai Nippon Printing Co., Ltd. Plastic card provided with magnetic stripe
EP1152369A1 (en) * 1999-09-17 2001-11-07 Dai Nippon Printing Co., Ltd. Information recorded medium, device for reading the information, information recorded medium transfer foil, and method for producing information recorded medium
WO2002017224A1 (en) * 2000-08-17 2002-02-28 Thorn Secure Science Limited Flexible magnetic foil or label including an optically diffractive structure
US20040027667A1 (en) * 2001-12-21 2004-02-12 Deutsch Erik R. Method and apparatus providing reduced polarization-dependent loss

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4684795A (en) * 1985-01-07 1987-08-04 United States Banknote Company L.P. Security tape with integrated hologram and magnetic strip
WO1993012506A1 (en) * 1991-12-19 1993-06-24 Control Module Inc. Secure optomagnetic identification
US5336871A (en) * 1992-02-07 1994-08-09 American Bank Note Holographics, Incorporated Holographic enhancement of card security
DE4212290C1 (en) 1992-02-29 1993-05-27 Leonhard Kurz Gmbh & Co, 8510 Fuerth, De Security element for e.g. credit card, identity card - consists of magnetic layer with dispersed magnetisable particles and security later for diffracted light e.g. hologram of computer generated diffraction structure
EP0609806A2 (en) * 1993-02-02 1994-08-10 Dai Nippon Printing Co., Ltd. Plastic card provided with magnetic stripe
EP1152369A1 (en) * 1999-09-17 2001-11-07 Dai Nippon Printing Co., Ltd. Information recorded medium, device for reading the information, information recorded medium transfer foil, and method for producing information recorded medium
WO2002017224A1 (en) * 2000-08-17 2002-02-28 Thorn Secure Science Limited Flexible magnetic foil or label including an optically diffractive structure
US20040027667A1 (en) * 2001-12-21 2004-02-12 Deutsch Erik R. Method and apparatus providing reduced polarization-dependent loss

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