WO2019233622A1 - Document de valeur, procédé de fabrication de celui-ci et dispositif d'impression - Google Patents

Document de valeur, procédé de fabrication de celui-ci et dispositif d'impression Download PDF

Info

Publication number
WO2019233622A1
WO2019233622A1 PCT/EP2019/000169 EP2019000169W WO2019233622A1 WO 2019233622 A1 WO2019233622 A1 WO 2019233622A1 EP 2019000169 W EP2019000169 W EP 2019000169W WO 2019233622 A1 WO2019233622 A1 WO 2019233622A1
Authority
WO
WIPO (PCT)
Prior art keywords
security element
pigments
medium
matrix
element according
Prior art date
Application number
PCT/EP2019/000169
Other languages
German (de)
English (en)
Inventor
Raphael DEHMEL
Maik Rudolf Johann Scherer
Kai Herrmann SCHERER
Tobias Sattler
Michael Rahm
Harald Lesch
Original Assignee
Giesecke+Devrient Currency Technology Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Giesecke+Devrient Currency Technology Gmbh filed Critical Giesecke+Devrient Currency Technology Gmbh
Priority to EP19729438.2A priority Critical patent/EP3802140A1/fr
Publication of WO2019233622A1 publication Critical patent/WO2019233622A1/fr

Links

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
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/369—Magnetised or magnetisable materials
    • 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
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • 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
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/378—Special inks

Definitions

  • the invention relates to a method for producing a value document, in particular a banknote, and a document obtainable by the method.
  • the invention further relates to a printing device suitable for carrying out the method.
  • Data carriers such as valuables or identity documents, or other valuables, such as branded articles, are often provided with security elements for the purpose of security, which permit verification of the authenticity of the data carriers and at the same time serve as protection against unauthorized reproduction.
  • Security elements with viewing-angle-dependent effects play a special role in the authentication of authenticity since they can not be reproduced even with the very latest copiers.
  • the security elements are equipped with optically variable elements that give the viewer under different viewing angles under a different image impression and, for example, depending on the viewing angle Betray another color or brightness impression and / or another graphic motif.
  • Magnetically orientable effect pigments are obtainable commercially, for example, under the trade name OVMI® from SICPA (the abbreviation OVMI stands for the term "optically variable magnetic ink”.)
  • the pigments typically have a platelet-like structure and are in the form of a layer composite which often has two With regard to the optical effect layers, metal-reflecting layers as well as color-shifting layer systems, eg with an absorber / dielectric / reflector structure, are suitable. Magnetic layer is usually not visible, but is required for alignment of the pigments.
  • the pigments dissolved or dispersed in a printing ink are printed on a support substrate, for example banknote paper or a polymeric bank of note substrate.
  • a support substrate for example banknote paper or a polymeric bank of note substrate.
  • the ink is still liquid, so that the platelet-shaped pigments within the color matrix surrounding the pigments are still freely movable.
  • an external magnetic field is applied, in which the pigments align themselves, wherein the pigments are typically arranged parallel to the field lines due to the shape anisotropy.
  • the color matrix surrounding the effect pigments is cured either by UV radiation or by the application of heat, so that the effect pigments are immobilized in the aligned state.
  • an optically variable effect such as a light reflection, which runs when tilting the printing technology security element along the tilting direction.
  • various optically variable effects can be realized.
  • encapsulated, optically variable, magnetic pigments can be realized, which can be applied by printing technology to a printing material.
  • encapsulated pigments it is possible to produce printable security elements whose optical effect can be greatly influenced by a magnetic field applied.
  • the document WO 2010/142391 Al describes a security element with an optical field changeable by an external magnetic field.
  • the security element has a plurality of microcapsules containing a suspension of a carrier liquid and magnetic nanoparticles. The nanoparticles reversibly form a photonic crystal in an external magnetic field of a magnet.
  • the encapsulation methods known from the prior art are associated with the disadvantage that e.g. The size of the individual capsules and the number of particles per capsule are controllable only to a limited extent and vary widely.
  • many expensive process steps are usually required, e.g. dispersing the particles in oil, dispersing the oil thus obtained in water, conducting an encapsulation, washing and sorting the capsules, preparing a curable printing ink from the capsules and printing the obtained ink onto a printing substrate, followed by Curing the applied ink.
  • the present invention has for its object to provide a manufacturing process, which is connected to a simplified production or processing Ver, in particular allows improved control over the capsule size or the capsule size population.
  • a security element having an optical appearance variable by an external magnetic field comprising a solid matrix and a plurality of microscopic chambers surrounded by the solid matrix, and the microvoids having a liquid medium and magnetic, are filled by an external magnetic field alignable pigments.
  • the magnetic pigments are magnetic effect pigments or magnetic nanoparticles or magnetic liquid crystals.
  • Chambers and are not present within the solid matrix may be almost exclusively within the microscopic Kamem netic pigments and are not present within the solid matrix substantially.
  • a security element according to clause 1 or 2, wherein magnetic pigments are present both within the microscopic chambers and within the solid matrix and the magnetic pigments present within the solid matrix are not alignable, ie immovable, by an external magnetic field.
  • step 2 2) dispersing the capsule medium obtained in step 1 in the liquid matrix medium such that the particles remain in the capsule medium and do not migrate into the matrix medium;
  • Matrix medium solidifies while the capsule medium remains liq liquid.
  • a security element comprising a solid matrix and a plurality of microscopic chambers enclosed by the solid matrix can be provided microscopic chambers are filled with a liquid medium and particles, for example optically variable pigments and / or nanoparticles
  • the solid matrix may also contain particles, eg optically variable pigments and / or nanoparticles.
  • the security element according to the invention is essentially flat and preferably has a thickness in a range from 2 mpi to 200 mih, in particular preferably a thickness in a range from 10 mhi to 60 mih.
  • the microscopic chambers are substantially spherical and preferably have a diameter in the range of 1 to 100 mih, in particular particular preferably has a diameter in the range of 5 mih to 40 mpa.
  • the liquid medium is in particular substantially transparent.
  • step 2 In order to ensure that the particles can be dispersed in step 1 and not pass into the matrix medium in step 2, it is preferred to select or modify the particles so as to ensure a sufficiently high miscibility of the particles with the capsule -Medium and a significantly reduced miscibility of the particles with the matrix medium results.
  • the particles are introduced only after step 2, provided that the miscibility of the particles is so selective that the particles inevitably accumulate exclusively in the capsule medium.
  • the capsule medium and the matrix medium are such that the two media do not dissolve into one another (or form a homogeneous solution together). This can be achieved, for example, by either using insoluble materials or by modifying the materials with additives such that their solubility is sufficiently low. Also possible are methods that lead to a physical barrier, such as the provision of surfactant layers.
  • the printing technology applying the mixture in step 3 can example, by gravure, flexographic printing, screen printing or ink jet printing he follow.
  • the matrix medium selectively hardens in step 4, it should preferably be chosen so that a polymerization reaction or crosslinking reaction can be started in a controlled manner.
  • Possibilities for this are e.g. the activation of a photoinitiator contained in the medium by UV radiation, or the thermal activation of the reaction, e.g. by IR radiation, or the chemical activation of the reaction by addition of a suitable additive.
  • Step 3 is analogous to step 3 of the method of manufacturing according to the first preferred embodiment.
  • miscibility in the course of curing is required to greatly change. This is e.g. in the case of selective polymerizations, during the polymerization the viscosity of the material increases, at the same time the solubility in other media decreases.
  • the system and the curing process are chosen so that the segregation is complete before the viscosity becomes too high, local reorganization occurs and the material solidifies.
  • a preferred way of accelerating segregation is based on vibrating the particles in a vibratory manner. This can be achieved, for example, in the case of magnetic particles by the use of a temporally variable, external magnetic field.
  • miscibilities can be drastically and selectively changed by modifying the surface of the particles by so-called self-assembled monolayers (or "self-assembled monolayers" or SAMs) .
  • Self-organized monolayers can be formed from molecules which have two different ends: one end serves to adhere to the surface to be coated, the other serves to modify the miscibility.
  • silane groups, phosphate groups or phosphoric acids can be used.
  • hydrocarbon chains are preferably used. In order to impart hydrophobicity to the hydrocarbon chains, the hydrocarbon chains can be fluorinated in particular. To impart hydrophilicity to the hydrocarbon chains, for example, OH groups are used.
  • a security element according to the invention is produced on the basis of the above-described manufacturing method according to the first or the second preferred embodiment.
  • Particles used are commercially available OVMI® pigments.
  • the OVMI® pigments are contained exclusively in the liquid inclusions of the security element.
  • the security element can be checked for authenticity, for example by placing a permanent magnet in the vicinity of the security element and perceiving the drastic change in the visual effect by the viewer.
  • the security element is characterized by the fact that the lines of light reflection follow the movement of the magnet without noticeable time delay.
  • a security element according to the invention is produced on the basis of the above-described manufacturing method according to the first or the second preferred embodiment.
  • Particles used are commercially available OVMI® pigments.
  • the manufacturing process is modified so that OVMI® pigments are located both in the liquid inclusions of the security element and within the solid matrix.
  • a special magnetic field is applied so that both the pigments in the matrix and the pigments in the capsules align with the field lines of the magnetic field. Only the pigments in the capsules can later be influenced with magnetic fields and orient differently, the pigments in the matrix are firmly anchored and fixed with respect to the spatial orientation.
  • a viewer always sees an overlay of a constantly the same optically variable effect and a variable optically variable effect. The verification of the authenticity of the security element can therefore also be done without the use of a magnet.
  • Embodiment 3 was carried out analogously to Embodiment 2, with the difference that two different types of OVMI® pigments are present in the security element, which are modifi ed such that the OVMI® pigments according to variety 1 are present only in the matrix medi um and the OVMI® pigments according to grade 2 are only present in the capsule medium. Since the OVMI® pigments of variety 1 and variety 2 have different colors, the the optical effects described in the embodiment 2 are still distinguishable deutl cher by the viewer from each other.

Landscapes

  • Credit Cards Or The Like (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)
  • Printing Methods (AREA)

Abstract

L'invention concerne un élément de sécurité présentant un aspect visuel pouvant varier du fait d'un champ magnétique externe. L'élément de sécurité comporte une matrice fixe et une pluralité, entourée par la matrice fixe, de chambres microscopiques. Les chambres microscopiques sont remplies d'un milieu fluide et de pigments magnétiques pouvant être orientés par un champ magnétique externe.
PCT/EP2019/000169 2018-06-05 2019-05-28 Document de valeur, procédé de fabrication de celui-ci et dispositif d'impression WO2019233622A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19729438.2A EP3802140A1 (fr) 2018-06-05 2019-05-28 Document de valeur, procédé de fabrication de celui-ci et dispositif d'impression

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018004432.8 2018-06-05
DE102018004432.8A DE102018004432A1 (de) 2018-06-05 2018-06-05 Wertdokument, Verfahren zum Herstellen desselben und Druckvorrichtung

Publications (1)

Publication Number Publication Date
WO2019233622A1 true WO2019233622A1 (fr) 2019-12-12

Family

ID=66810747

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2019/000169 WO2019233622A1 (fr) 2018-06-05 2019-05-28 Document de valeur, procédé de fabrication de celui-ci et dispositif d'impression

Country Status (3)

Country Link
EP (1) EP3802140A1 (fr)
DE (1) DE102018004432A1 (fr)
WO (1) WO2019233622A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009074284A2 (fr) 2007-12-11 2009-06-18 Giesecke & Devrient Gmbh Élément de sécurité optiquement variable
WO2010142391A1 (fr) 2009-06-10 2010-12-16 Giesecke & Devrient Gmbh Élément de sécurité comprenant un fluide magnétique

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009074284A2 (fr) 2007-12-11 2009-06-18 Giesecke & Devrient Gmbh Élément de sécurité optiquement variable
WO2010142391A1 (fr) 2009-06-10 2010-12-16 Giesecke & Devrient Gmbh Élément de sécurité comprenant un fluide magnétique

Also Published As

Publication number Publication date
EP3802140A1 (fr) 2021-04-14
DE102018004432A1 (de) 2019-12-05

Similar Documents

Publication Publication Date Title
DE602004013155T2 (de) Verfahren und mittel zur herstellung eines magnetisch hervorgerufenen musters in einer beschichtung mit magnetischen partikeln
DE60214753T2 (de) Herstellung von Gegenständen aus Verbundwerkstoffen, die aus dünnen Schichten zusammengesetzt sind
EP2038124B2 (fr) Procédé pour appliquer une microstructure, moule d'outil et objet doté d'une microstructure
EP2440412B1 (fr) Elément de sécurité avec un fluide magnétique
EP3802141B1 (fr) Procédé de fabrication d'un document de valeur, document de valeur et dispositif d'impression
DE4041025A1 (de) Magnetischer, metallischer sicherheitsfaden mit negativschrift
DE112013004497T5 (de) Magnetisches Sicherheitselement mit einem Effekt eines verborgenen dreidimensionalen Bewegungsbildes und Druckverfahren hierfür
DE102008058378A1 (de) Verfahren zum schichtweisen Aufbau von Kunststoffmodellen
DE102007052477B4 (de) Verfahren zur Herstellung eines Sicherheitsmediums und Sicherheitsmedium
EP3459758A1 (fr) Document de valeur, son procédé de fabrication et imprimante
DE102009010770A1 (de) Verbessertes Verfahren zur Herstellung einer optisch variablen Sicherheitsvorrichtung
DE102019109998B4 (de) Sicherheitsmerkmal basierend auf einer ausrichtung von spiegeln an einer einzigen achse in einer ein mikrospiegelarray bildenden strukturierten oberfläche
EP3501839B1 (fr) Particules de protection contre la contrefaçon
DE102011116488A1 (de) Optisch variables Sicherheitselement mit mikrokapselbasierter Farbschicht
EP3196043A1 (fr) Élément optique variable comprenant un pigment pouvant être orienté magnétiquement
WO2019233622A1 (fr) Document de valeur, procédé de fabrication de celui-ci et dispositif d'impression
DE102019008289A1 (de) Effektpigment, Herstellungsverfahren, Wertdokument und Druckfarbe
DE102011116490A1 (de) Optisch variables Sicherheitselement mit mikrokapselbasierter Farbschicht
DE102014019222A1 (de) Herstellung eines Sicherheitsmerkmals
DE102007001953B4 (de) Mikrostrukturierter Film, Verfahren zu seiner Herstellung und seine Verwendung
WO2019233623A1 (fr) Procédé de fabrication d'un document de valeur, document de valeur et dispositif d'impression
WO2021204427A1 (fr) Pigment à effet, encre d'impression, élément de sécurité et support de données
DE102018004434A1 (de) Effektpigment, Druckfarbe, Sicherheitselement, Datenträger und Herstellungsverfahren
DE102018007719A1 (de) Partikel für den Fälschungsschutz
DE102018000385A1 (de) Einstellungsmagnet für die Herstellung von Sicherheitselementen mit magnetisch orientierten Effektpigmenten und Herstellverfahren für solche Einstellmagnete

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19729438

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 2019729438

Country of ref document: EP

Effective date: 20210111