EP3178660B1 - Personalisable security element - Google Patents

Personalisable security element Download PDF

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Publication number
EP3178660B1
EP3178660B1 EP15003477.5A EP15003477A EP3178660B1 EP 3178660 B1 EP3178660 B1 EP 3178660B1 EP 15003477 A EP15003477 A EP 15003477A EP 3178660 B1 EP3178660 B1 EP 3178660B1
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EP
European Patent Office
Prior art keywords
layer
carrier substrate
security element
coating
liquid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP15003477.5A
Other languages
German (de)
French (fr)
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EP3178660A1 (en
EP3178660B2 (en
Inventor
Marco Mayrhofer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hueck Folien GmbH
Constantia Pirk GmbH and Co KG
Original Assignee
Hueck Folien GmbH
Hueck Folien GmbH and Co KG
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Application filed by Hueck Folien GmbH, Hueck Folien GmbH and Co KG filed Critical Hueck Folien GmbH
Priority to PL15003477T priority Critical patent/PL3178660T3/en
Priority to ES15003477T priority patent/ES2724550T3/en
Priority to EP15003477.5A priority patent/EP3178660B2/en
Publication of EP3178660A1 publication Critical patent/EP3178660A1/en
Application granted granted Critical
Publication of EP3178660B1 publication Critical patent/EP3178660B1/en
Publication of EP3178660B2 publication Critical patent/EP3178660B2/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
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
    • B42D25/21—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose for multiple purposes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
    • B42D25/25—Public transport tickets
    • 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
    • B42D25/364—Liquid crystals
    • 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
    • B42D25/41—Marking using electromagnetic radiation
    • 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
    • B42D25/45—Associating two or more layers
    • B42D25/465—Associating two or more layers using chemicals or adhesives
    • B42D25/47—Associating two or more layers using chemicals or adhesives using adhesives

Definitions

  • the invention relates to a security element which can be used as a label or security feature for documents of value, objects, packaging and the like and which can be provided in a simple manner with individual information.
  • Patent document WO 01/62509 A1 discloses a personalizable security element comprising a backing layer, an adhesive layer, and a liquid crystal layer.
  • the first carrier substrate may be provided with a self-adhesive coating on top of the laser-writable black metal coating or thermoactivatable dye coating.
  • first carrier substrate for example, flexible plastic films, for example, from PI, PP, MOPP, PE, PPS, PEEK, PEK, PEI, PSU, PAEK, LCP, PEN, PBT, PET, PA, PC, COC, POM, ABS, PVC, PTFE, ETFE (ethylene tetrafluoroethylene), PFA (tetrafluoroethylene-perfluoropropyl vinyl ether-fluorocopolymer), MFA (tetrafluoro-methylene-perfluoropropyl vinyl ether fluorocopolymer), PTFE (polytetrafluoroethylene), PVF (polyvinyl fluoride), PVDF (polyvinylidene fluoride), and EFEP (ethylene-tetrafluoroethylene-hexafluoropropylene fluoropolymer).
  • carrier substrates made of PET are used.
  • the carrier films preferably have a thickness of 5 to 700 .mu.
  • the first carrier substrate may consist of a paper.
  • This paper substrate consists of pulp-free or cellulose-containing paper, or of a composite of paper, for example with plastics, which paper substrate may have a basis weight of 20-500 g / m 2 , preferably 40-200 g / m 2 .
  • the first support substrate may comprise a laser-writable black metallic coating, for example of non-stoichiometric metal oxide or mixtures of metals and metal oxides.
  • a suitable laser-writable black metallization is for example in the EP 1 567 363 B describe.
  • the plastic film may have a coating of a thermoactivatable dye (direct thermal coating).
  • a thermoactivatable dye direct thermal coating
  • coatings containing, for example, leuco dyes are suitable as direct thermal coating.
  • a coating of a liquid-crystalline material or a layer of an optionally transparent Farbkipp conciselacks is applied.
  • the Farbkipp compactlack can also be applied directly to the existing on the first carrier substrate coating.
  • the plastic film may consist of the same material as the first carrier substrate or else consist of a different material than the first carrier substrate.
  • This coating of a liquid crystalline material may consist of a printing ink containing pigments of liquid crystal material.
  • the pigments consist of cholesteric or a mixture of nematic and cholesteric liquid crystals.
  • the coating may be made of a liquid-crystalline material as a polymer layer.
  • the two carrier substrates can then optionally be laminated against one another by means of a laminating adhesive, the layers present on the respective carrier substrates adjoining one another.
  • a self-adhesive coating can be applied to the surface of this carrier substrate opposite the coating of the second carrier substrate.
  • the security element can be fixed as a label on the object to be secured.
  • the security element according to the invention can then be personalized or later. This makes it possible to customize the printing in each case to the desired requirements and also to customize.
  • the printing can be in the form of characters, letters, numbers, symbols images or even in the form of an encoding, such as a barcode.
  • the printing may contain, for example, security-relevant information, such as, for example, coding, product-specific data, production data, batch identifications and the like.
  • the security element has a laser-writable black coating
  • the security element is described by means of a laser.
  • the color shift effect is initially visible on the entire security element, after the treatment by means of a laser, the color shift effect is extinguished in the described areas.
  • a suitable laser-writable black metallization is for example in the EP 1 567 363 B describe.
  • FIGS. 1 to 3 inventive structures of the security label are shown.
  • FIG. 1 shows an embodiment of the security element according to the invention in which a paper substrate 1, which has a coating with a thermally activatable dye is provided with a connected via a laminating adhesive layer 2 layer of a liquid crystal material 3. Subsequently, the security element is printed in a direct thermal process from the side of the layer of liquid-crystalline material 3.
  • FIG. 1 a shows the condition after the printing of the security element Fig. 1 , In area 8, the security element is provided with a printing 12. The resulting dark background in the printing area clearly and brilliantly recognizes the color shift effect in the area of the printing 12 (letters H and F). Outside of the printed area, ie in the area 9, the color-shift effect is only very weakly or not at all recognizable.
  • FIG. 2 an embodiment of the security element according to the invention is shown, in which a plastic film 4 is provided with a laser-writable black metallic layer 5. On this layer 5, a layer of a Farbkipp solack 3a is applied directly.
  • the security element has a full-surface color shift effect.
  • the security element is described by means of a laser.
  • FIG. 2a the security element is shown after the laser inscription.
  • the black metallization is destroyed in the area 10, the color shift effect in this area essentially extinguished almost entirely.
  • the color shift effect is barely noticeable in the range 10 (letters H and F), within the range 11 the color shift effect is clearly and brilliantly recognizable.
  • FIG. 2b shows the security element FIG. 2a in supervision after the laser inscription.
  • FIG. 3 shows a further embodiment of the security element according to the invention, which can be used for example in the form of a security label.
  • a layer of a liquid-crystalline material 3 connected via a laminating adhesive layer 2 is applied to a carrier substrate made of a plastic film 1a provided with a coating of a thermoactivatable dye.
  • a self-adhesive coating 6 is applied on the opposite surface of this layer structure.
  • the security element then becomes how to FIG. 1 executed printed by a direct thermal process.
  • the security element can be connected by means of the self-adhesive coating 6 with the object to be secured 7.
  • the security elements according to the invention are optionally suitable after appropriate packaging in or on data carriers, in particular documents of value such as identification cards, banknotes or labels, seals and the like, but also as packaging material, for example in the pharmaceutical, electronics and / or food industry, for example in the form of Blister foils, cartons, covers, foil packaging and the like.
  • the substrates or film materials are preferably cut into strips or threads or patches, the width of the strips or threads preferably being 0.05-10 mm and the patches preferably having average widths or lengths of 0.3 - 20 mm
  • the film material is preferably cut into strips, tapes, threads or patches, wherein the width of the threads, strips or tapes is preferably 0.05-50 mm and the patches preferably have average widths and lengths of 2. 30 mm.
  • the security elements according to the invention are used as labels for securing data carriers, products or packaging.

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  • Toxicology (AREA)
  • Manufacturing & Machinery (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • General Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)
  • Heat Sensitive Colour Forming Recording (AREA)
  • Credit Cards Or The Like (AREA)
  • Laminated Bodies (AREA)

Description

Die Erfindung betrifft ein Sicherheitselement, das als Etikett oder Sicherheitsmerkmal für Wertdokumente, Gegenstände, Verpackungen und dergleichen verwendbar ist und das auf einfache Weise mit individuellen Informationen versehen werden kann.The invention relates to a security element which can be used as a label or security feature for documents of value, objects, packaging and the like and which can be provided in a simple manner with individual information.

Patentdokument WO 01/62509 A1 , in der Beschreibung auf Seite 1 zitiert, offenbart ein Personalisierbares Sicherheitselement die eine Trägerschicht, eine Klebeschicht und eine Flüssigkristallschicht aufweist.Patent document WO 01/62509 A1 , cited in the specification on page 1, discloses a personalizable security element comprising a backing layer, an adhesive layer, and a liquid crystal layer.

Aufgabe der Erfindung ist es ein Sicherheitselement bereitzustellen, das nach seiner Herstellung auf einfache Weise mit individuellen Informationen versehen werden kann und das ein optisch ansprechendes Erscheinungsbild aufweist. Gegenstand der Erfindung ist daher ein personalisierbares Sicherheitselement aufweisend ein Trägersubstrat und eine optisch variable Schicht, dadurch gekennzeichnet, dass das Sicherheitselement folgende Schichtenfolge aufweist:

  1. a) ein Trägersubstrat bestehend aus einer flexiblen Kunststofffolie, die eine laserbeschreibbare schwarze metallische Beschichtung oder ein Trägersubstrat bestehend aus einer flexiblen Kunststofffolie oder einem Papier, das eine Beschichtung aus einem thermoaktivierbaren Farbstoff aufweist
  2. b) ggf. eine Kaschierklebeschicht
  3. c) eine Schicht aus einem flüssigkristallinen Material oder einem Farbkippeffektlack.
The object of the invention is to provide a security element that can be provided after its production in a simple manner with individual information and has a visually appealing appearance. The invention therefore relates to a personalisable security element having a carrier substrate and an optically variable layer, characterized in that the security element has the following layer sequence:
  1. a) a carrier substrate consisting of a flexible plastic film comprising a laser-writable black metallic coating or a carrier substrate consisting of a flexible plastic film or a paper having a coating of a thermally activatable dye
  2. b) optionally a laminating adhesive layer
  3. c) a layer of a liquid-crystalline material or a Farbkippeffektlack.

Ein weiterer Gegenstand der Erfindung ist ein Verfahren zur Herstellung eines personalisierbaren Sicherheitselements, gekennzeichnet durch folgende Verfahrensschritte:

  1. a) Bereitstellen eines ersten Trägersubstrats aus einer flexiblen Kunststofffolie, die auf einer Oberfläche eine laserbeschreibbare schwarze metallische Beschichtung oder aus einer flexiblen Kunststofffolie oder einem Papier, das eine Beschichtung aus einem thermoaktivierbaren Farbstoff aufweist
  2. b) Bereitstellen eines zweiten Trägersubstrats aus einer flexiblen Kunststofffolie
  3. c) Aufbringen einer Schicht aus flüssigkristallinen Material auf das zweite Trägersubstrat
  4. d) ggf. Aufbringen einer Kaschierklebeschicht auf die Schicht aus flüssigkristallinem Material
  5. e) Kaschieren des Schichtaufbaus des ersten Trägersubstrats gegen die auf dem zweiten Trägersubstrat vorhandene Schicht,
  6. f) Abziehen des zweiten Trägersubstrats
  7. g) Bedrucken des Sicherheitselements mit einem Thermodirektverfahren, wodurch der Farbkippeffekt der Schicht aus flüssigkristallinen Material im Bereich der Bedruckung sichtbar wird,
oder
  • b1) Aufbringen einer Farbkippeffektlackschicht auf das zweite Trägersubstrat
  • c1) ggf. Aufbringen einer Kaschierklebeschicht auf die Farbkippeffektlackschicht
  • d1) Kaschieren des Schichtaufbaus des ersten Trägersubstrats gegen die auf dem zweiten Trägersubstrat vorhandene Schicht,
  • e1) Abziehen des zweiten Trägersubstrats
  • f1) Beschreiben des Sicherheitselements mit einem Laserstrahl, wodurch der Farbkippeffekt der Farbkippeffektlackschicht im Bereich der Bedruckung ausgelöscht wird.
A further subject of the invention is a method for producing a personalisable security element, characterized by the following method steps:
  1. a) providing a first carrier substrate of a flexible plastic film having on one surface a laser-writable black metallic coating or of a flexible plastic film or a paper comprising a coating of a thermoactivatable dye
  2. b) providing a second carrier substrate of a flexible plastic film
  3. c) applying a layer of liquid-crystalline material to the second carrier substrate
  4. d) optionally applying a laminating adhesive layer to the layer of liquid-crystalline material
  5. e) laminating the layer structure of the first carrier substrate against the layer present on the second carrier substrate,
  6. f) peeling off the second carrier substrate
  7. g) printing the security element using a direct thermal method, whereby the color-shift effect of the layer of liquid-crystalline material becomes visible in the area of the printing,
or
  • b1) applying a Farbkippeffektlackschicht on the second carrier substrate
  • c1) optionally applying a Kaschierklebeschicht on the Farbkippeffektlackschicht
  • d1) laminating the layer structure of the first carrier substrate against the layer present on the second carrier substrate,
  • e1) stripping off the second carrier substrate
  • f1) Describing the security element with a laser beam, whereby the color shift effect of the Farbkippeffektlackschicht is erased in the region of the printing.

Gegebenenfalls kann das erste Trägersubstrat auf der, der laserbeschreibbaren schwarzen metallischen Beschichtung oder der Beschichtung aus einem thermoaktivierbaren Farbstoff gegenüberliegenden Oberfläche mit einer Selbstklebebeschichtung versehen werden.Optionally, the first carrier substrate may be provided with a self-adhesive coating on top of the laser-writable black metal coating or thermoactivatable dye coating.

Als erstes Trägersubstrat kommen beispielsweise flexible Kunststofffolien, beispielsweise aus PI, PP, MOPP, PE, PPS, PEEK, PEK, PEI, PSU, PAEK, LCP, PEN, PBT, PET, PA, PC, COC, POM, ABS, PVC, PTFE, ETFE (Ethylentetrafluorethylen), PFA (Tetrafluorethylen-Perfluorpropylvinylether-Fluorcopolymer), MFA (Tetrafluor-methylen-Perfluorpropylvinylether-Fluorcopolymer), PTFE (Polytetra-fluorethylen), PVF (Polyvinylfluorid), PVDF (Polyvinylidenfluorid), und EFEP (Ethylen-Tetrafluorethylen-Hexafluorpropylen-Fluorterpolymer) in Frage.
Bevorzugt werden Trägersubstrate aus PET vewendet.
Die Trägerfolien weisen vorzugsweise eine Dicke von 5 - 700 µm, bevorzugt 5 - 200 µm, besonders bevorzugt 5 - 50 µm auf.As a first carrier substrate, for example, flexible plastic films, for example, from PI, PP, MOPP, PE, PPS, PEEK, PEK, PEI, PSU, PAEK, LCP, PEN, PBT, PET, PA, PC, COC, POM, ABS, PVC, PTFE, ETFE (ethylene tetrafluoroethylene), PFA (tetrafluoroethylene-perfluoropropyl vinyl ether-fluorocopolymer), MFA (tetrafluoro-methylene-perfluoropropyl vinyl ether fluorocopolymer), PTFE (polytetrafluoroethylene), PVF (polyvinyl fluoride), PVDF (polyvinylidene fluoride), and EFEP (ethylene-tetrafluoroethylene-hexafluoropropylene fluoropolymer).
Preferably, carrier substrates made of PET are used.
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 kann das erste Trägersubstrat aus einem Papier bestehen. Dieses Papiersubstrat besteht aus zellstofffreiem oder zellstoffhaltigem Papier, oder aus einem Verbund aus Papier, beispielsweise mit Kunststoffen, wobei dieses Papiersubstrat ein Flächengewicht von 20 - 500 g/m2, vorzugsweise 40 - 200 g/m2 aufweisen kann.Furthermore, the first carrier substrate may consist of a paper. This paper substrate consists of pulp-free or cellulose-containing paper, or of a composite of paper, for example with plastics, which paper substrate may have a basis weight of 20-500 g / m 2 , preferably 40-200 g / m 2 .

Das erste Tägersubstrat kann eine laserbeschreibbare schwarze metallische Beschichtung, beispielsweise aus nichtstöchiometrischem Metalloxiden oder Mischungen aus Metallen und Metalloxiden aufweisen.
Eine geeignete laserbeschreibbare schwarze Metallisierung ist beispielsweise in der EP 1 567 363 B beschreiben.The first support substrate may comprise a laser-writable black metallic coating, for example of non-stoichiometric metal oxide or mixtures of metals and metal oxides.
A suitable laser-writable black metallization is for example in the EP 1 567 363 B describe.

Alternativ kann die Kunststofffolie eine Beschichtung aus einem thermoaktivierbaren Farbstoff (Thermodirektbeschichtung) aufweisen.
Als Thermodirektbeschichtung kommen beispielsweise Beschichtungen, die beispielsweise Leucofarbstoffe enthalten, in Frage. Es kann aber auch handelsübliches mit einem thermoaktivierbaren Farbstoff versehenes Papier verwendet werden. Dieser Aufbau erscheint weiß opak.Alternatively, the plastic film may have a coating of a thermoactivatable dye (direct thermal coating).
For example, coatings containing, for example, leuco dyes are suitable as direct thermal coating. However, it is also possible to use commercial paper provided with a thermally activatable dye. This structure appears white opaque.

Auf ein zweites Trägersubstrat aus einer flexiblen Kunststofffolie wird eine Beschichtung aus einem flüssigkristallinem Material oder eine Schicht eines ggf. transparenten Farbkippeffektlacks aufgebracht.On a second carrier substrate of a flexible plastic film, a coating of a liquid-crystalline material or a layer of an optionally transparent Farbkippeffektlacks is applied.

Alternativ kann der Farbkippeffektlack auch direkt auf die, auf dem ersten Trägersubstrat vorhandene, Beschichtung aufgebracht werden.Alternatively, the Farbkippeffektlack can also be applied directly to the existing on the first carrier substrate coating.

Dabei kann die Kunststofffolie aus demselben Material bestehen wie das erste Trägersubstrat oder aber auch aus einem anderen Material bestehen als das erste Trägersubstrat.In this case, the plastic film may consist of the same material as the first carrier substrate or else consist of a different material than the first carrier substrate.

Diese Beschichtung aus einem flüssigkristallinen Material kann aus einer Druckfarbe bestehen, die Pigmente aus flüssigkristallinem Material enthält. Insbesondere bestehen die Pigmente aus cholesterischen oder einer Mischung aus nematischen und cholesterischen Flüssigkristallen. Ferner kann die Beschichtung aus einem flüssigkristallinem Material als Polymerschicht ausgeführt sein.This coating of a liquid crystalline material may consist of a printing ink containing pigments of liquid crystal material. In particular, the pigments consist of cholesteric or a mixture of nematic and cholesteric liquid crystals. Furthermore, the coating may be made of a liquid-crystalline material as a polymer layer.

Unter Farbkippeffektlack wird eine Druckfarbe verstanden, die Pigmente aufweist, die einen Farbkippeffekt zeigen, also sog. Interferenzpigmente.Under Farbkippeffektlack a printing ink is understood to have the pigments that show a color shift effect, so-called. Interference pigments.

Die beiden Trägersubstrate können anschließend ggf. mittels eines Kaschierklebers gegeneinander kaschiert werden, wobei die auf den jeweiligen Trägersubstraten vorhandenen Schichten aneinander angrenzen.The two carrier substrates can then optionally be laminated against one another by means of a laminating adhesive, the layers present on the respective carrier substrates adjoining one another.

Anschließend kann ggf. eine Selbstklebebeschichtung auf die der Beschichtung des zweiten Trägersubstrats gegenüber liegende Oberfläche dieses Trägersubstrats aufgebracht werden. Mit Hilfe dieser Selbstklebebeschichtung kann das Sicherheitselement als Etikett auf dem zu sichernden Gegenstand fixiert werden.Subsequently, if appropriate, a self-adhesive coating can be applied to the surface of this carrier substrate opposite the coating of the second carrier substrate. With the help of this self-adhesive coating, the security element can be fixed as a label on the object to be secured.

Das erfindungsgemäße Sicherheitselement kann anschließend oder zu einem späteren Zeitpunkt personalisiert werden.
Dadurch ist es möglich die Bedruckung jeweils an die gewünschten Erfordernisse anzupassen und auch kundenspezifisch zu gestalten.The security element according to the invention can then be personalized or later.
This makes it possible to customize the printing in each case to the desired requirements and also to customize.

In dem Fall, in dem im Schichtaufbau des Sicherheitselements eine Thermodirektbeschichtung vorhanden ist, erfolgt eine Bedruckung mit Hilfe eines Thermodirektdruckers.In the case in which a direct thermal coating is present in the layer structure of the security element, printing takes place with the aid of a direct thermal printer.

Die Bedruckung kann in Form von Zeichen, Buchstaben, Zahlen, Symbolen Bildern oder auch in Form einer Codierung, wie eines Barcodes vorliegen.The printing can be in the form of characters, letters, numbers, symbols images or even in the form of an encoding, such as a barcode.

Die Bedruckung kann beispielsweise sicherheitsrelevante Informationen, wie beispielsweise eine Codierung, produktspezifische Daten, Herstellungsdaten, Chargenkennzeichnungen und dergleichen enthalten.The printing may contain, for example, security-relevant information, such as, for example, coding, product-specific data, production data, batch identifications and the like.

Durch die Bedruckung wird in den bedruckten Bereichen die Farbe der Thermodirektbeschichtung verändert, es entstehen dunkle Bereiche in Form der Bedruckung.As a result of printing, the color of the direct thermal coating is changed in the printed areas, resulting in dark areas in the form of printing.

Dadurch ist vor diesem nun dunklen Hintergrund nun bei Betrachtung im Auflicht der Farbkippeffekt der Beschichtung aus flüssigkristallinem Material sichtbar.As a result, in front of this now dark background, the color-shift effect of the coating of liquid-crystal material is now visible when viewed in reflected light.

In dem Fall in dem das Sicherheitselement eine laserbeschreibbare schwarze Beschichtung aufweist, wird das Sicherheitselement mit Hilfe eines Lasers beschrieben. Dabei ist der Farbkippeffekt vorerst auf dem gesamten Sicherheitselement sichtbar, nach der Behandlung mittels eines Lasers wird in den beschriebenen Bereichen der Farbkippeffekt ausgelöscht.
Eine geeignete laserbeschreibbare schwarze Metallisierung ist beispielsweise in der EP 1 567 363 B beschreiben.In the case where the security element has a laser-writable black coating, the security element is described by means of a laser. The color shift effect is initially visible on the entire security element, after the treatment by means of a laser, the color shift effect is extinguished in the described areas.
A suitable laser-writable black metallization is for example in the EP 1 567 363 B describe.

In den Figuren 1 bis 3 sind erfindungsgemäße Aufbauten des Sicherheitsetiketts dargestellt.In the FIGS. 1 to 3 inventive structures of the security label are shown.

Darin bedeutenMean in it

  • 1 ein Papiersubstrat, das eine Beschichtung aus einem thermoaktivierbaren Farbstoff aufweist1 shows a paper substrate having a thermoactivatable dye coating
  • 1a eine Kunststofffolie, die eine Beschichtung aus einem thermoaktivierbaren Farbstoff aufweist1a is a plastic film having a coating of a thermally activatable dye
  • 2 eine Kaschierklebeschicht2 a laminating adhesive layer
  • 3 eine Schicht aus einem flüssigkristallinen Material3 a layer of a liquid-crystalline material
  • 3 a eine Schicht aus einem Farbkippeffektlack3 a is a layer of a color shift effect varnish
  • 4 eine Kunststofffolie4 a plastic film
  • 5 eine schwarze Metallisierung5 a black metallization
  • 6 eine Selbstklebebeschichtung6 a self-adhesive coating
  • 7 den zu sichernden Gegenstand7 the object to be secured
  • 8 einen Bereich, in dem das Sicherheitselement eine Bedruckung aufweist8 an area in which the security element has a printing
  • 9 einen Bereich, in dem das Sicherheitselement keine Bedruckung aufweist9 an area in which the security element has no printing
  • 10 einen Bereich, in dem das Sicherheitselement eine Laserbeschriftung aufweist10 shows an area in which the security element has a laser inscription
  • 11 einen Bereich, in dem das Sicherheitselement keine Laserbeschriftung aufweist11 an area in which the security element has no laser marking
  • 12 die Bedruckung12 the printing
  • 13 die Laserbeschriftung13 the laser inscription

Figur 1 zeigt eine Ausführungsform des erfindungsgemäßen Sicherheitselements bei dem ein Papiersubstrat 1, das eine Beschichtung mit einem thermoaktivierbaren Farbstoff aufweist mit einer über eine Kaschierklebeschicht 2 verbundene Schicht aus einem flüssigkristallinem Material 3 versehen ist.
Anschließend wird das Sicherheitselement in einem Thermodirektverfahren von der Seite der Schicht aus flüssigkristallinen Material 3 bedruckt.
Figur 1 a zeigt den Zustand nach der Bedruckung des Sicherheitselements aus Fig. 1.
Im Bereich 8 ist das Sicherheitselement mit einer Bedruckung 12 versehen.
Durch den dabei entstehenden dunklen Hintergrund im Bereich der Bedruckung wird der Farbkippeffekt im Bereich der Bedruckung 12 (Buchstaben H und F) deutlich und brillant erkennbar. Außerhalb des bedruckten Bereichs, also im Bereich 9 ist der Farbkippeffekt nur äußerst schwach bis gar nicht erkennbar. FIG. 1 shows an embodiment of the security element according to the invention in which a paper substrate 1, which has a coating with a thermally activatable dye is provided with a connected via a laminating adhesive layer 2 layer of a liquid crystal material 3.
Subsequently, the security element is printed in a direct thermal process from the side of the layer of liquid-crystalline material 3.
FIG. 1 a shows the condition after the printing of the security element Fig. 1 ,
In area 8, the security element is provided with a printing 12.
The resulting dark background in the printing area clearly and brilliantly recognizes the color shift effect in the area of the printing 12 (letters H and F). Outside of the printed area, ie in the area 9, the color-shift effect is only very weakly or not at all recognizable.

Dies ist in der, in Figur 1b gezeigten, Aufsicht des Sicherheitselementes aus Fig. 1a dargestellt.This is in, in FIG. 1b shown, supervision of the security element Fig. 1a shown.

In Figur 2 ist eine Ausführungsform des erfindungsgemäßen Sicherheitselements dargestellt, bei dem eine Kunststofffolie 4 mit einer laserbeschreibbaren schwarzen metallischen Schicht 5 versehen ist. Auf diese Schicht 5 ist direkt eine Schicht aus einem Farbkippeffektlack 3a aufgebracht.
Das Sicherheitselement weist dabei einen vollflächigen Farbkippeffekt auf.In FIG. 2 an embodiment of the security element according to the invention is shown, in which a plastic film 4 is provided with a laser-writable black metallic layer 5. On this layer 5, a layer of a Farbkippeffektlack 3a is applied directly.
The security element has a full-surface color shift effect.

Anschließend wird das Sicherheitselement mittels eines Lasers beschrieben. In Figur 2a ist das Sicherheitselement nach der Laserbeschriftung dargestellt.
Dabei wird im Bereich 10 die schwarze Metallisierung zerstört, der Farbkippeffekt in diesem Bereich im Wesentlichen beinahe zur Gänze ausgelöscht. Der Farbkippeffekt ist im Bereich 10 (Buchstaben H und F) kaum bis gar nicht erkennbar, innerhalb des Bereichs 11 ist der Farbkippeffekt deutlich und brillant erkennbar.Subsequently, the security element is described by means of a laser. In FIG. 2a the security element is shown after the laser inscription.
In this case, the black metallization is destroyed in the area 10, the color shift effect in this area essentially extinguished almost entirely. The color shift effect is barely noticeable in the range 10 (letters H and F), within the range 11 the color shift effect is clearly and brilliantly recognizable.

Figur 2b zeigt das Sicherheitselement aus Figur 2a in Aufsicht nach der Laserbeschriftung. FIG. 2b shows the security element FIG. 2a in supervision after the laser inscription.

Figur 3 zeigt eine weitere Ausführungsform des erfindungsgemäßen Sicherheitselements, das beispielsweise in Form eines Sicherheitsetiketts verwendbar ist.
Dabei ist auf einem Trägersubstrat aus einer mit einer Beschichtung aus einem thermoaktivierbaren Farbstoff versehenen Kunststofffolie 1a, eine über eine Kaschierklebeschicht 2 verbundene Schicht aus einem flüssigkristallinen Material 3 aufgebracht. Auf der diesem Schichtaufbau gegenüberliegenden Oberfläche ist eine Selbstklebebeschichtung 6 aufgebracht. FIG. 3 shows a further embodiment of the security element according to the invention, which can be used for example in the form of a security label.
In this case, a layer of a liquid-crystalline material 3 connected via a laminating adhesive layer 2 is applied to a carrier substrate made of a plastic film 1a provided with a coating of a thermoactivatable dye. On the opposite surface of this layer structure, a self-adhesive coating 6 is applied.

Das Sicherheitselement wird dann, wie zu Figur 1 ausgeführt mittels eines Thermodirektverfahrens bedruckt.The security element then becomes how to FIG. 1 executed printed by a direct thermal process.

Anschließend kann das Sicherheitselement mittels der Selbstklebebeschichtung 6 mit dem zu sichernden Gegenstand 7 verbunden werden.Subsequently, the security element can be connected by means of the self-adhesive coating 6 with the object to be secured 7.

Die erfindungsgemäßen Sicherheitselemente sind gegebenenfalls nach entsprechender Konfektionierung in oder auf Datenträgern, insbesondere Wertdokumenten wie Ausweisen, Karten, Banknoten oder Etiketten, Siegeln und dergleichen geeignet, aber auch als Verpackungsmaterial beispielsweise in der pharmazeutischen, der Elektronik- und/oder Lebensmittelindustrie, beispielsweise in Form von Blisterfolien, Faltschachteln, Abdeckungen, Folienverpackungen und dergleichen geeignet.The security elements according to the invention are optionally suitable after appropriate packaging in or on data carriers, in particular documents of value such as identification cards, banknotes or labels, seals and the like, but also as packaging material, for example in the pharmaceutical, electronics and / or food industry, for example in the form of Blister foils, cartons, covers, foil packaging and the like.

Für die Anwendung als Sicherheitselemente auf Datenträgern werden die Substrate bzw. Folienmaterialien bevorzugt in Streifen oder Fäden oder Patches geschnitten, wobei die Breite der Streifen oder Fäden vorzugsweise 0,05 - 10 mm beträgt und die Patches vorzugsweise mittlere Breiten bzw. Längen von 0,3 - 20 mm aufweisenFor use as security elements on data carriers, the substrates or film materials are preferably cut into strips or threads or patches, the width of the strips or threads preferably being 0.05-10 mm and the patches preferably having average widths or lengths of 0.3 - 20 mm

Für die Anwendung in oder auf Verpackungen wird das Folienmaterial bevorzugt in Streifen, Bänder, Fäden oder Patches geschnitten, wobei die Breite der Fäden, Streifen bzw. Bänder vorzugsweise 0,05 - 50 mm beträgt und die Patches vorzugsweise mittlere Breiten und Längen von 2 - 30 mm aufweisen.For use in or on packaging, the film material is preferably cut into strips, tapes, threads or patches, wherein the width of the threads, strips or tapes is preferably 0.05-50 mm and the patches preferably have average widths and lengths of 2. 30 mm.

Mit einer Selbstklebebeschichtung versehen, werden die erfindungsgemäßen Sicherheitselemente als Etiketten zur Sicherung von Datenträgern, Produkten oder Verpackungen verwendet.Provided with a self-adhesive coating, the security elements according to the invention are used as labels for securing data carriers, products or packaging.

Claims (7)

  1. Personalizable security element having a carrier substrate and an optically variable layer, characterized in that the security element has the following layer sequence:
    a) a carrier substrate consisting of a flexible polymeric film, which has a laser-writable black metallic coating or a coating of a thermoactivatable dye, or of paper which has a direct thermal coating
    b) optionally a laminating adhesive layer
    c) a layer of a liquid-crystalline material or of a colour flock effect coating material.
  2. Security element according to Claim 1, characterized in that the laser-writable metallic coating consists of non-stoichiometric metal oxides or mixtures of metals and metal oxides.
  3. Security element according to either of Claims 1 and 2, characterized in that the layer of a liquid-crystalline material consists of a printing ink which comprises pigments composed of liquid-crystalline material, such as pigments composed of cholesteric liquid crystals or of a mixture of nematic and cholesteric liquid crystals.
  4. Security element according to either of Claims 1 and 2, characterized in that the layer of liquid-crystalline material is a polymer layer.
  5. Security element according to either of Claims 1 and 2, characterized in that the colour flock effect coating material consists of a printing ink which comprises interference pigments.
  6. Method for producing a personalizable security label, characterized by the following method steps:
    a) providing a first carrier substrate composed of a flexible polymeric film which on one surface has a laser-writable black metallic coating, or of a flexible polymeric film or of a paper which has a coating of a thermoactivatable dye
    b) providing a second carrier substrate composed of a flexible polymeric film
    c) applying a layer of liquid-crystalline material to the second carrier substrate
    d) optionally applying a laminating adhesive layer to the layer of liquid-crystalline material
    e) laminating the layer construction of the first carrier substrate to the layer present on the second carrier substrate,
    f) removing the second carrier substrate
    g) printing the security element by a direct thermal process, thereby visualizing the colour flock effect of the layer of liquid-crystalline material in the region of the printing,
    or
    b1) applying a colour flock effect coating layer to the second carrier substrate
    c1) optionally applying a laminating adhesive layer to the colour flock effect coating layer
    d1) laminating the layer construction of the first carrier substrate to the layer present on the second carrier substrate,
    e1) removing the second carrier substrate
    f1) writing the security element with a laser beam, thereby extinguishing the colour flock effect of the colour flock effect coating layer in the region of printing.
  7. Use of the security elements according to any of Claims 1 to 5 as security elements or security label in or on data storage media, products or packaging.
EP15003477.5A 2015-12-07 2015-12-07 Personalisable security element Active EP3178660B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PL15003477T PL3178660T3 (en) 2015-12-07 2015-12-07 Personalisable security element
ES15003477T ES2724550T3 (en) 2015-12-07 2015-12-07 Customizable Security Element
EP15003477.5A EP3178660B2 (en) 2015-12-07 2015-12-07 Personalisable security element

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15003477.5A EP3178660B2 (en) 2015-12-07 2015-12-07 Personalisable security element

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EP3178660B1 true EP3178660B1 (en) 2019-02-06
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WO2023280673A1 (en) 2021-07-07 2023-01-12 Tesa Se Detachable film laminate and method for detaching permanent adhesive bonds

Also Published As

Publication number Publication date
PL3178660T3 (en) 2019-07-31
EP3178660A1 (en) 2017-06-14
EP3178660B2 (en) 2022-12-28
ES2724550T3 (en) 2019-09-12

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