EP4149770A1 - Élément de sécurité - Google Patents

Élément de sécurité

Info

Publication number
EP4149770A1
EP4149770A1 EP21726868.9A EP21726868A EP4149770A1 EP 4149770 A1 EP4149770 A1 EP 4149770A1 EP 21726868 A EP21726868 A EP 21726868A EP 4149770 A1 EP4149770 A1 EP 4149770A1
Authority
EP
European Patent Office
Prior art keywords
layer
security element
phase change
change material
multilayer structure
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.)
Pending
Application number
EP21726868.9A
Other languages
German (de)
English (en)
Inventor
Martin EGGINGER
Stephan Trassl
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
Original Assignee
Hueck Folien 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 Hueck Folien GmbH filed Critical Hueck Folien GmbH
Publication of EP4149770A1 publication Critical patent/EP4149770A1/fr
Pending legal-status Critical Current

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
    • 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
    • B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
    • B42D25/29—Securities; Bank notes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/40—Manufacture
    • B42D25/405—Marking
    • B42D25/41—Marking using electromagnetic radiation

Definitions

  • the invention relates to a security element, comprising a substrate and an optically variable multilayer structure, and a method for producing the same, as well as the use of the security element.
  • Data carriers such as documents of value and the like, are provided with security elements to protect against forgery and to check authenticity.
  • data carriers are understood to mean in particular documents of value, such as bank notes, certificates and shares, as well as identification documents, e.g. passports and the like.
  • Other items such as packaging materials and branded items, are also often equipped with security elements that allow the authenticity to be checked and at the same time serve as protection against unauthorized reproduction.
  • Such security elements can for example be in the form of a security thread embedded in a bank note, a cover film for a bank note with a hole, an applied security strip, a self-supporting transfer element or also in the form of a feature area applied directly to a value document.
  • Documents of value generally include personalizing and / or individualizing information that enables the document to be assigned to a person and / or a group of people, objects and / or entities.
  • Individualizing information can include, for example, a serial number or an indication of the issuing authority.
  • the personalizing and / or individualizing information also represents a security feature.
  • Personalizing information is understood to mean information that can be assigned to a person. These can include, for example, image information, such as a passport photo, a fingerprint, etc., or alphanumeric character strings, such as a name, an address, a date of birth or the like.
  • a value or identity card with colored image information is known.
  • the image information is broken down into a light / dark component and a color component, the light / dark component intended for the visual impression being incorporated into the map in a high-resolution form.
  • the colored image information is congruently superimposed on this portion, so that an integral overall impression is created.
  • one of the parts of the image information is incorporated into a card structure in a largely forgery-proof manner.
  • Laser thermal transfer systems have also received more attention in recent years.
  • a donor web having a layer of infrared absorbing transfer medium is placed in contact with a receptor and the assembly is exposed to a pattern of IR radiation.
  • the absorption of the IR radiation causes a rapid development of heat in the exposed areas, which in turn causes the transfer of the medium from the donor to the receptor in order to generate an image.
  • This transfer can be the result of sublimation, ablation, film or mass transfer, for example.
  • the exposed transfer medium is propelled from the donor to the receptor by the generation of a gas.
  • Specific polymers are selected that decompose when exposed to heat to quickly generate a gas.
  • the build-up of gas under or within the transfer medium acts as a propellant to transfer the medium to the receptor. Examples of laser ablation systems can be found, for example, in US 5,516,622, US 5,518,861 and US 5,326,619.
  • the colorant and associated binder materials are transferred in a molten or semi-molten state upon exposure to the radiation source on a receptor.
  • the thermal transfer medium adheres to the receptor surface with greater strength than to the donor surface, which leads to the physical transfer of the medium in the areas shown (e.g. JP 63319192 A, EP 745489 A, US 5,501,937 A).
  • the disadvantage of the known methods is that the known security elements, which are produced by means of laser-addressable pigments or by means of laser ablation, are limited to one color.
  • elements with viewing angle-dependent effects have played a role in recent years, since these cannot be reproduced even with the most modern copiers.
  • the security elements are equipped with optically variable elements which give the viewer a different image impression from different viewing angles and, depending on the viewing angle, show a different color or brightness impression and / or a different graphic motif.
  • the phrase “optically variable” or “optical variability” is understood to mean the change in an optical property that can be detected by a viewer of a security element or data carrier with a layer according to the invention viewed by the viewer.
  • the variable optical properties are understood to mean in particular the properties of a color that people perceive as fundamental, namely hue, brightness and color saturation.
  • the quality of the color effect on a viewer of a security element according to the invention can furthermore be described by values such as chroma, sparkleness (color intensity), chromaticity, depth of color, brilliance and gray cast.
  • the security elements, data carriers or colored layers according to the invention can also be characterized by further optical properties, e.g. by their reflectivity.
  • the invention has the object of specifying a security element with an optically variable element which can provide two-color image information by means of laser action and thus provides better protection against manipulation or falsification.
  • the subject matter of the invention is a security element comprising a substrate and an optically variable multilayer structure, which is characterized in that the multilayer structure comprises a spacer layer and a phase change material layer.
  • phase change materials are extremely advantageously suitable as optically variable components of colored security elements.
  • the functionality of phase change materials (“phase change materials", PCM) is based on the property of compounds to exist in different crystal structures or states of order, which can be reversibly transformed into one another and have different physical properties.
  • phase change materials Depending on the application, the structure of a PCM is converted from an amorphous to a crystalline state and vice versa, for example in the nanosecond range, using short, intense laser pulses.
  • the PCMs that can be used according to the invention include, for example, vanadium oxides (VOx), niobium oxides (NbOx) and compounds or alloys comprising Ge / Sb / Te (chalcogenides), Ge / Te, Ge / Sb, Ga / Sb, Ag / In / Sb / Te, In / Sb, In / Sb / Te, In / Se, Sb / Te, Te / Ge / Sb / S, Ag / Sb / Se, Sb / Se, Ge / Sb / Mn / Sn, Ag / Sb / Te, Au / Sb / Te or Al / Sb, especially the following compounds / alloys in every stable stoichiometry: GeSbTe, VOx, NbOx, GeTe, GeSb, GaSb, AglnSbTe, InSb, InSbTe, InSe, SbTe, Te
  • PCMs include Ge 2 Sb 2 Te 5 and Ag 3 In 4 Sb 76 Tei 7 (known as AIST). Various stoichiometric forms of these materials are also possible, for example Ge x Sb y Te z . Each of these materials can also comprise one or more dopants, such as C or N. Some of these materials have the property of being stable both in the amorphous and in the crystalline phase at room temperature. In addition to the materials mentioned, materials other than PCM can also be used.
  • the multilayer structure preferably further comprises a reflection-enhancing layer, the spacer layer being arranged between the reflection-enhancing layer and the phase change material layer.
  • this multi-layer structure results in a certain color that is changed when, for example, a laser acts on the phase change material and changes its state.
  • This “switching” of the PCM layer makes it possible to generate high-resolution, two-color image information, motifs, etc., which allow authentication and make reproduction difficult.
  • the reflection-enhancing layer is arranged adjacent to the substrate. This essentially results in a structure of substrate / reflection-enhancing layer / spacer layer / phase change material layer.
  • this structure can also comprise other or additional layers.
  • phase change material layer is closest to the viewer, ie he is looking at the phase change material layer (regardless of any transparent layers present on the phase change material layer).
  • the phase change material layer is closest to the viewer, ie he is looking at the phase change material layer (regardless of any transparent layers present on the phase change material layer).
  • Phase change material layer arranged adjacent to the substrate. This essentially results in a structure of substrate / phase change material layer / spacer layer / reflection-enhancing layer. This structure can also include other or additional layers.
  • the substrate which is transparent in this case, is closest to the viewer, i.e. he is looking at the substrate (regardless of any transparent layers that may be present on the reflection-enhancing layer).
  • This structure can be used, for example, in the case of documents of value with security windows.
  • the phase change material of the phase change material layer is preferably selected from VOx, NbOx and compounds or alloys of GeSbTe, GeTe, GeSb, GaSb, AglnSbTe, InSb, InSbTe, InSe, SbTe, TeGeSbS, AgSbSe, SbSe, GeSbMnSe and, preferably, AlSbTe, AgSbMnSe Ge 2 Sb 2 Te 5 and Ag 3 ln 4 Sb Tei.
  • the phase change material layer preferably has a thickness of about 7-35 nm.
  • the spacer layer can be a dielectric layer. Precisely defined optical interferences between the reflected or transmitted partial beams of incident light can be caused by dielectric coatings. In this way, incident light can be adjusted in almost any way in terms of transmission and reflection.
  • dielectric materials with a refractive index less than or equal to 1.65 come into question, e.g. aluminum oxide (Al 2 0 3 ), metal fluorides, e.g. magnesium fluoride (MgF 2 ), aluminum fluoride (AIF 3 ), silicon oxide (SiO x ) , Silicon dioxide (Si0 2 ), cerium fluoride (CeF 3 ), sodium-aluminum fluoride (e.g.
  • Na 3 AIF 6 or Na 5 AI 3 F 14 neodymium fluoride (NdF 3 ), lanthanum fluoride (LaF 3 ), samarium fluoride (SmF 3 ) , Barium fluoride (BaF 2 ), calcium fluoride (CaF 2 ), lithium fluoride (LiF), low refractive index organic monomers and / or low refractive index organic polymers.
  • the above-mentioned materials can be vapor-deposited or, especially if they are monomers and polymers, printed on.
  • dielectric materials with a refractive index greater than 1.65 can also be used, e.g. zinc sulfide (ZnS), zinc oxide (ZnO), titanium dioxide (Ti0 2 ), carbon (C), indium oxide (In 2 0 3 ) , Indium tin oxide (ITO), tantalum pentoxide (Ta 2 0 5 ), cerium oxide (Ce0 2 ), yttrium oxide (Y 2 0 3 ), europium oxide (Eu 2 0 3 ), iron oxides such as iron (ll, lll) oxide (Fe 3 0 4 ) and iron (III) oxide (Fe 2 0 3 ), hafnium nitride (HfN), hafnium carbide (HfC), hafnium oxide (Hf0 2 ), lanthanum oxide (La 2 0 3 ), magnesium oxide (MgO), neodymium oxide (Nd 2 0
  • ZnS zinc sulfide
  • the spacer layer preferably has a thickness such that a 1/4 system is formed, and this is in the range of approximately 50-700 nm for the specified materials.
  • the reflection-enhancing layer which ensures that the part of the light passing through the PCM layer is reflected again in order to produce the color impression for the viewer, is formed in advantageous configurations by an opaque reflector layer.
  • a metallic layer is preferably used as the reflection-enhancing layer, which preferably comprises at least one metal selected from the group consisting of aluminum, gold, chromium, silver, copper, tin, platinum, nickel and their alloys, for example nickel / chromium or copper /Aluminum. It is also conceivable that the reflection-enhancing metallic layer contains a semiconductor such as silicon. Finally, it is also conceivable that the reflection-enhancing metallic layer is produced by applying a printing ink with metallic pigments, preferably from a metal from the aforementioned group.
  • the security element is designed as a semitransparent element, e.g. to be able to be used in a see-through window of a document of value
  • the multi-layer structure is selected in such a way that the color impression obtained by the PCM can be seen through the see-through window.
  • a semitransparent metal layer or a transparent reflection-intensifying layer is used as the reflection-enhancing layer.
  • dielectric materials with a refractive index greater than or equal to 1.65 come into question, such as zinc sulfide (ZnS), zinc oxide (ZnO), titanium dioxide (T ⁇ 0 2 ), carbon ( C), indium oxide (In 2 03), indium tin oxide (ITO), tantalum pentoxide (Ta20 5 ), cerium oxide (Ce02), yttrium oxide (Y2O3), europium oxide (Eu 2 0 3 ), iron oxides such as iron (II , lll) oxide (Fe 3 0 4 ) and iron (lll) oxide (Fe 2 0 3 ), hafnium nitride (HfN), hafnium carbide (HfC), hafnium oxide (Hf0 2 ),
  • the layer thickness of the transparent reflection-enhancing layer is preferably in the range from 30 nm to 300 nm, particularly preferably in the range from 50 nm to 100 nm.
  • the reflection-enhancing layer is preferably vapor-deposited in a vacuum vapor deposition process.
  • a wide variety of vapor deposition processes are suitable for producing the layers.
  • a methodical group forms the physical vapor deposition ("physical vapor deposition", PVD) with boat vaporization, vaporization by resistance heating, vaporization by induction heating or electron beam vaporization, sputtering (DG or AC) and arc vaporization.
  • PVD physical vapor deposition
  • vapor deposition can also take the form of chemical vapor deposition (CVD), such as sputtering in reactive plasma or any other plasma-assisted vapor deposition.
  • CVD chemical vapor deposition
  • the multilayer structure further comprises a cover layer.
  • Cover layers serve, for example, as a protective layer against external mechanical or chemical effects or as an adhesive layer.
  • an adhesive varnish such as a heat-sealing varnish, can be used for the top layer, it also being possible for a primer to be integrated into the top layer.
  • Flexible plastic films also called carrier films, are preferably used as the substrate.
  • This can be, for example, PI (polyimide), PP (polypropylene), MOPP (monoaxially stretched polypropylene), PE (polyethylene), PPS (polyphenylene sulfide), PEEK (polyetheretherketone), PEK (polyetherketone), PEI (polyetherimide), PSU ( Polysulfone), PAEK (polyaryletherketone), LCP (liquid crystal polymers), PEN (polyethylene naphthalate), PBT (polybutylene terephthalate), PET (polyethylene terephthalate), PA (polyamide), PC (polycarbonate), COC (cyclo-olefin copolymers) , POM (polyoxymethylene), ABS (acrylonitrile butadiene styrene), PVC (polyvinyl chloride), PTFE (polytetrafluoroethylene), ETFE (
  • the films preferably have a thickness of 5-700 ⁇ m, preferably 5-200 ⁇ m, particularly preferably 5-100 ⁇ m.
  • the security element forms a security strip, a security thread, a security tape, a patch or a transfer element for application to a security paper, document of value and the like.
  • a second aspect of the invention relates to a method for producing a security element in which an optically variable multilayer structure is formed on a substrate, the optically variable multilayer structure comprising a phase change material layer.
  • optically variable multilayer structure a transparent spacer layer is sandwiched between the phase change material layer and a reflection-enhancing layer.
  • a cover layer is preferably also formed on the multilayer structure.
  • the phase change material layer is modified by the action of a laser, preferably flat in the form of motifs such as picture elements, numbers, letters, etc., in particular after application of the security element to a document of value.
  • a passport lamination film can be individualized by laser writing.
  • a consecutive serial number can be written in control marks, for example.
  • the security element is required in the form of a window thread, it is not necessary to use this already modified.
  • the personalization can also advantageously only be carried out after the thread has been introduced, e.g. into the bank note.
  • the subject of the invention according to a third aspect is the use of a security element described above to protect against forgery of documents of value and goods of any kind.
  • the substrate can be peeled off from the multilayer structure of the security element or it can remain as a fixed component, for example as a protective layer.
  • the security element can also have further layers, such as those with other security features.
  • the security element forms a semitransparent element and the substrate of the security element is not to be removed when it is applied to the value document, e.g. because it also serves as an adhesive or protective layer, the substrate is also optically transparent.
  • the substrate is also optically transparent.
  • a multilayer structure is provided in which the phase change material layer is arranged adjacent to the substrate.
  • FIG. 1 shows a schematic representation of the principle of PCM on the basis of an exemplary optically variable multilayer structure in a security element according to the invention in two different states
  • FIG. 2 shows a schematic representation of the layer structure of an embodiment of the security element according to the invention, which is provided for use in a see-through window of a document of value.
  • the two different (crystal) states of a phase change material are each shown in a section of a security element according to an embodiment of the invention.
  • the security element 1 has the same structure in the left and right figures, each corresponding to a different solid state of the PCM, and consists of an optically variable multilayer structure 2 which, for the sake of clarity, is essentially only the one required to achieve the inventive effect Shows elements or layers.
  • the multilayer structure 2 is formed on a substrate 3, which for example consists of a plastic film such as PE, PP or PTFE, with a thickness of 5-100 ⁇ m, and comprises a spacer layer 4 and a PCM layer 5.
  • a substrate 3 which for example consists of a plastic film such as PE, PP or PTFE, with a thickness of 5-100 ⁇ m, and comprises a spacer layer 4 and a PCM layer 5.
  • the phase change material of the PCM layer 5 assumes a certain state at room temperature, which can be either a crystalline or an amorphous phase.
  • the state of the PCM is amorphous in the right figure, while it is crystalline in the left figure.
  • energy acts in particular in the form of a laser beam 6, in particular in the form of a pulse
  • the phase change material switches from amorphous (disordered) to crystalline (ordered) or vice versa.
  • FIG. 1 shows, enlarged in a circular section, schematically the crystal structure of the “disordered” amorphous phase (right) and the “ordered” crystalline phase (left) of the PCM layer 5.
  • the phase change material of the PCM layer 5 is, for example, a vanadium oxide, a niobium oxide or a stoichiometric form of a compound or alloy of various combinations of Ge, Sb, Te, In and Ga as well as other elements such as Ag, Au, Al, Mn or S.
  • Die PCM layer has a thickness of about 7-35 nm, for example.
  • the spacer layer 4 is preferably a dielectric layer, which, depending on the application, can be materials with a refractive index ⁇ 1.65, such as SiO 2 , or dielectrics with a refractive index greater than 1.65, such as ZnO.
  • the layer thickness of the transparent spacer layer 4 is selected such that a 1/4 system is formed when light is irradiated.
  • the multilayer structure 2 further comprises a reflection-enhancing layer 7 between the spacer layer 4 and the substrate 3, the reflection-enhancing layer 7 being arranged adjacent to the substrate 3 in the embodiment shown.
  • An opaque metallic layer such as Al or Pt, a semitransparent metal layer and an HRI layer such as ZnO can be used as the material for the reflection-enhancing layer 7.
  • the multi-layer structure 2 also comprises a cover layer 11, which can be designed, for example, as a protective layer against external influences.
  • a security element modified in this way would correspond, for example, to the combination of the right and left images in FIG. 1 to form a single security element.
  • a security element there would be an area, for example in the form of a motif, in which the phase change material would be in an amorphous state and would appear, for example, magenta, and an area in which the phase change material is in a crystalline state and, for example, appear yellow would.
  • FIG. 2 An alternative embodiment of the security element 1 according to the invention is shown in FIG. 2.
  • the layer structure in this example differs from that from FIG. 1 in that it is not the reflection-enhancing layer 7 but rather the PCM layer 5 that is arranged adjacent to the substrate 3.
  • the multilayer structure 2 thus has the same sequence as in Fig. 1, i.e. an arrangement in which the spacer layer 4 is present between the reflection-enhancing layer 7 and the PCM layer 5, but the substrate 3 is on the other side of the multilayer structure 2.
  • the substrate 3 is closest to the viewer and consequently transparent in order to make the color of the phase change material visible.
  • the substrate 3 can also be designed as an adhesive or protective layer if it is not to be removed after the security element has been applied to a value document.
  • a layer structure without a reflection-enhancing layer would also be possible, so that the security element appears to the viewer from both sides, for example as a colored stripe or thread, in the window.

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Business, Economics & Management (AREA)
  • Accounting & Taxation (AREA)
  • Finance (AREA)
  • Credit Cards Or The Like (AREA)
  • Laminated Bodies (AREA)

Abstract

L'invention concerne un élément de sécurité qui comprend un substrat et une structure multicouche optiquement variable et qui peut être écrit sous l'action d'un laser, la structure multicouche comprenant une couche d'espacement et une couche de matériau à changement de phase. L'élément de sécurité permet ainsi la génération d'informations d'image à deux couleurs à haute résolution qui sont plus difficiles à reproduire.
EP21726868.9A 2020-05-12 2021-05-12 Élément de sécurité Pending EP4149770A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA50408/2020A AT523060B1 (de) 2020-05-12 2020-05-12 Sicherheitselement
PCT/EP2021/062631 WO2021228943A1 (fr) 2020-05-12 2021-05-12 Élément de sécurité

Publications (1)

Publication Number Publication Date
EP4149770A1 true EP4149770A1 (fr) 2023-03-22

Family

ID=75851308

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21726868.9A Pending EP4149770A1 (fr) 2020-05-12 2021-05-12 Élément de sécurité

Country Status (3)

Country Link
EP (1) EP4149770A1 (fr)
AT (1) AT523060B1 (fr)
WO (1) WO2021228943A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4141081A1 (fr) * 2021-08-30 2023-03-01 Hueck Folien Gesellschaft m.b.H. Élément adhésif

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63319192A (ja) 1987-06-23 1988-12-27 Showa Denko Kk 熱転写材料
DE4134539A1 (de) 1991-10-18 1993-04-22 Gao Ges Automation Org Aufzeichnungstraeger mit farbigen bildinformationen, insbesondere wert- oder ausweiskarte
DE69317458T2 (de) 1992-04-14 1998-07-09 Konishiroku Photo Ind Wärmeempfindliches Übertragungsaufzeichnungsmaterial
GB9225724D0 (en) 1992-12-09 1993-02-03 Minnesota Mining & Mfg Transfer imaging elements
US5326619A (en) 1993-10-28 1994-07-05 Minnesota Mining And Manufacturing Company Thermal transfer donor element comprising a substrate having a microstructured surface
EP0679531B1 (fr) 1994-04-26 1997-07-23 E.I. Du Pont De Nemours And Company Elément et procédé pour transfert ablative induit par laser
US5518861A (en) 1994-04-26 1996-05-21 E. I. Du Pont De Nemours And Company Element and process for laser-induced ablative transfer
JP2850754B2 (ja) * 1994-05-20 1999-01-27 日本電気株式会社 相変化型光ディスク
US5807461A (en) 1996-05-09 1998-09-15 Fargo Electronics, Inc. Lamination technique
US6264296B1 (en) 1997-05-06 2001-07-24 Fargo Electronics, Inc. Ink jet identification card printer with lamination station
US7037013B2 (en) 2001-03-05 2006-05-02 Fargo Electronics, Inc. Ink-receptive card substrate
EP2067063A1 (fr) * 2006-09-22 2009-06-10 Alcan Technology & Management Ltd. Substrats munis de caractéristiques de sécurité et procédé pour leur fabrication
DE102008032224A1 (de) * 2008-07-09 2010-01-14 Giesecke & Devrient Gmbh Sicherheitselement
DE102017106545A1 (de) * 2017-03-27 2018-09-27 Ovd Kinegram Ag Verfahren zur Herstellung eines optischen Sicherheitsmerkmals sowie ein Sicherheitselement und ein Sicherheitsdokument
DE102018006314A1 (de) * 2018-08-09 2020-02-13 Giesecke+Devrient Currency Technology Gmbh Plättchenförmiges Effektpigment, Druckfarbe und Datenträger

Also Published As

Publication number Publication date
AT523060B1 (de) 2021-05-15
AT523060A4 (de) 2021-05-15
WO2021228943A1 (fr) 2021-11-18

Similar Documents

Publication Publication Date Title
EP2512819B1 (fr) Elément couche mince multicouche de couleur d'or
EP2939845B1 (fr) Élément de sécurité transparent à microstructures
EP2501553B1 (fr) Elément de sûreté à microstructure
DE60114156T2 (de) Pigment mit vom betrachungswinkel abhängiger farbigkeit, dessen herstellung und verwendung, sowie zusammensetzung diese enthaltend
EP3374197B1 (fr) Élément de sécurité, procédé de fabrication de l'élément de sécurité, et support de données équipé de cet élément de sécurité
EP2173571A2 (fr) Élément de sécurité
WO2006002756A2 (fr) Element de securite a effet changeant des couleurs par basculement
EP1330369A1 (fr) Corps multicouche, notamment film multicouche et procede permettant d'assurer une meilleure protection d'un corps multicouche contre des contrefacons
DE102008013167A1 (de) Sicherheitselement und Verfahren zu seiner Herstellung
EP3752371A2 (fr) Élément de sécurité et procédé de fabrication d'un élément de sécurité
EP2465703B1 (fr) Elément de sécurité à couleur variable structuré
AT523060B1 (de) Sicherheitselement
DE102014011663A1 (de) Sicherheitselement und Wertdokument
DE10337331A1 (de) Sicherheitselement mit Dünnschichtelement
EP4121299B1 (fr) Élément de sécurité plat présentant des caractéristiques de sécurité optique
EP4054854B1 (fr) Document de valeur
EP4275911A1 (fr) Élément de sécurité
EP4275912A1 (fr) Élément de sécurité
EP4306328A1 (fr) Élément de sécurité
EP3760450B1 (fr) Élément de sécurité pour un document de valeur
EP3800062A1 (fr) Élément de sécurité doté d'une couche à effet optique conçue sous la forme d'élément à couche mince
EP3800061A1 (fr) Élément de sécurité doté d'une couche à effet optique
EP3302996A1 (fr) Élément de sécurité à effet de variation des couleurs
EP4389443A1 (fr) Élément de sécurité
WO2024011272A1 (fr) Élément de sécurité

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: UNKNOWN

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20221108

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)