WO2005034048A1 - Element de securite et son procede de production - Google Patents

Element de securite et son procede de production Download PDF

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Publication number
WO2005034048A1
WO2005034048A1 PCT/EP2004/010263 EP2004010263W WO2005034048A1 WO 2005034048 A1 WO2005034048 A1 WO 2005034048A1 EP 2004010263 W EP2004010263 W EP 2004010263W WO 2005034048 A1 WO2005034048 A1 WO 2005034048A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
security element
security
element according
protective
Prior art date
Application number
PCT/EP2004/010263
Other languages
German (de)
English (en)
Inventor
Theo Burchard
Original Assignee
Giesecke & Devrient 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=34398852&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2005034048(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Giesecke & Devrient Gmbh filed Critical Giesecke & Devrient Gmbh
Priority to DE502004011340T priority Critical patent/DE502004011340D1/de
Priority to AT04765177T priority patent/ATE472784T1/de
Priority to EP04765177A priority patent/EP1668606B1/fr
Publication of WO2005034048A1 publication Critical patent/WO2005034048A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/355—Security threads

Definitions

  • the invention relates to a security element for security papers, banknotes, ID cards, passports or the like, as well as a security paper and a value document with such a security element. Furthermore, the invention relates to methods for producing the security element or the security paper and the value document with such a security element.
  • Security and value documents such as banknotes, shares, bonds, certificates, checks, high-quality admission tickets, but also other documents that are subject to counterfeiting, such as passports or other identification documents, are usually provided with security elements to increase their security against counterfeiting.
  • a security thread is proposed in the publication EP 0 330 733 AI, in which a translucent plastic film is coated with metal and this coating is provided with cutouts in the form of characters or patterns.
  • This security thread is embedded in so-called “window security thread” in security paper, ie it is virtually woven into the paper during the formation of the security paper, so that it is freely accessible at regular intervals on the surface of the paper and is completely embedded in the paper only in the intermediate areas
  • optically varying structures such as holograms, diffraction structures, reflection patterns in the form of surfaces inclined at different angles to the document level, which are embossed into the metal-coated surface
  • an additional transparent protective layer protects these structures and the metal coating against external mechanical and chemical influences.
  • DE 10226 116 AI describes a security element which has at least two metal layers of different colors, which are arranged on the same surface of the security element and, at least in regions, directly adjoin one another.
  • the metal layers are arranged on a plastic layer, which is part of the security element.
  • the security element can be a security thread which consists of a self-supporting plastic film to which the differently colored metal layers are applied.
  • the security element can also be designed as a transfer element.
  • the layer structure of the security element consists of a carrier film to which a plastic layer is applied. Diffraction structures in the form of a relief structure can be introduced into this plastic layer.
  • the differently colored metal layers are arranged above it.
  • the transfer material on the metal layers also has an adhesive layer which is activated by transferring heat and pressure to the corresponding security paper or value document in the areas to be transferred and then lies between the security paper and the metal layers.
  • an adhesive layer provides a certain protection for the metal layers adjoining it.
  • the plastic sheet of the security element with diffraction structures in the form of a relief is provided structure in which the diffraction structures any diffractive structures such as holograms or grating structures (for example, Kinegram ®, pixels grams) or the like may be high demands on the chemical and physical Resistance.
  • Metal vapor deposition for example aluminum vapor deposition, is particularly sensitive in the layer structure, since here even the slightest changes are perceived by the eye as faulty.
  • the metal layer is preferably attacked by acids and alkalis, which, starting from tiny contact points, can cause extensive corrosion of the entire layer.
  • a layer of lacquer can be applied to protect the metallization.
  • the protective lacquer In order to obtain a homogeneous, closed surface, the protective lacquer must wet and run perfectly. As a rule, this ideal state is never reached, so that with a simple printing process there are always violations of the protective layer applied with it. Due to such defects, e.g. Cracks, holes, etc., aggressive media can find their way to the metal layer at any time, with the consequences described above.
  • the known protective layers are therefore generally not sufficient to ensure optimal protection for highly sensitive, optically variable structures.
  • the invention is therefore based on the object of specifying a security element and a method for its production which avoids the disadvantages of the prior art.
  • the security element should have a high chemical and physical resistance with regard to the metallization and thus an improved corrosion protection.
  • the security element has at least one plastic layer on which at least one metal layer is arranged, with at least two protective layers being arranged one above the other on the metal layer. These protect the metal layer or layers of metal physical and chemical influences and ensure good protection against the penetration of liquids and thus against corrosion.
  • the invention is based on the finding that the defects in a first protective layer are very likely to be bridged if a further layer is applied over this first protective layer. With each additional layer, the risk of aggressive media penetrating down to the metal layer is reduced.
  • protective layers formed from the same paint system. All chemical-resistant compounds are suitable as protective lacquers. Particularly preferred protective lacquers are polyurethane lacquers, acrylates, polyvinyl chlorides or polyvinyl chloride copolymers, polyvinylidene chlorides and UV-crosslinkable dispersions, such as acrylic-polyurethane dispersions, in particular aliphatic polyurethane dispersions. Due to the at least double application of the protective lacquers, the metal layer is well protected against physical and chemical influences and against the penetration of liquids and in particular aggressive media.
  • the protective layers are formed from different paint systems.
  • the layers of lacquer forming the protective layers are suitably matched to one another in such a way that they form a highly resistant composite.
  • Particularly preferred protective lacquers of the combination coating are polyurethane lacquers, acrylates, polyvinyl chlorides or polyvinyl chloride copolymers, polyvinylidene chlorides, UV-crosslinkable dispersions, such as acrylic-polyurethane dispersions, in particular aliphatic polyurethane dispersions, and nitrocellulose.
  • the protective layers are present on the metal layer in a coating weight of approximately 0.3 to 4.0 g / m 2 , preferably approximately 0.5 to 1.0 g / m 2, per layer . It goes without saying that the amount of coating required depends in particular on the paint used. Since the injuries or defects generally present in the protective layer directly adjacent to the metal layer are very likely to be bridged by applying at least one further protective layer, this first protective layer can also have a slightly lower coating weight than the subsequent layer (s) ) be upset. The reverse case is of course also conceivable, ie the first protective layer has a somewhat higher coating weight than the subsequent protective layer (s). In any case, the respective layer thicknesses must be sufficient to form an overall closed surface after all protective layers have been applied.
  • UV lacquer Radiation-curing and in particular UV-drying lacquers
  • UV lacquer have an extremely high physical and chemical resistance.
  • UV lacquer also have the disadvantage that, as a rule, after radiation curing, depending on the quality of the substrate, the radiation output , the initiator system and the monomer system residual monomers and free photoinitiators remain as very reactive components in depressions, and UV coatings often have weaknesses in the coating.
  • a first or lowermost protective layer is therefore formed by a physically drying lacquer layer applied to the metal layer or layers, which makes contact with the underlying metal layer or, in the case of cutouts, with the underlying layer Manufactures plastic layer, and a second or uppermost protective layer is present as a radiation-curing lacquer layer.
  • the latter protects the metal layer from physical and chemical influences, ensures good protection against the penetration of liquids and especially aggressive media and also provides high abrasion resistance.
  • the bottom lacquer layer is advantageously formed by a two-component, solvent-based polyurethane adhesive.
  • the protective layer is expediently applied to the metal layer in a layer thickness such that it forms as smooth and coherent a layer as possible on the metal layer and in particular fills out any recesses present in the metal layer.
  • the defects of the lacquer layer, such as cracks, holes, etc., which generally still remain, are closed according to the invention by applying one or more further protective layers.
  • the lacquers used for the bottom protective layer preferably comprise polyurethane systems, acrylates and UV-crosslinkable disks. persions and emulsions, which can be both solvent-based and water-based.
  • the top lacquer layer is preferably a radiation-hardening lacquer layer.
  • the radiation-curing lacquer layer is a UV-crosslinking lacquer layer.
  • Their extremely high physical and chemical resistance allows a corresponding qualitative increase and adaptation of the requirement profile. Due to the higher chemical resistance and the difficult wettability, such a protective layer creates a long-term, effective barrier against liquids, e.g. Acids and alkalis. The higher physical resistance also results in high abrasion resistance.
  • a UV-crosslinking layer forms an infusible layer.
  • the amount of coating required depends, among other things, on the paints used. It has proven to be advantageous if the protective layer of physically drying lacquer is present on the metal layers in a coating weight of approximately 0.3 to 4.0 g / m 2 , preferably approximately 0.5 to 1.0 g / m 2 . the amount in the undried, wet state depends in particular on the solids content. In any case, the layer thickness should be sufficient to close existing recesses in the metal layer.
  • the protective layer made of radiation-curing lacquer is applied with a coating weight of approximately 0.3 to 4.0 g / m 2 , preferably approximately 0.5 to 2.0 g / m 2 .
  • the top lacquer layer is applied directly to the bottom lacquer layer.
  • further physically drying and / or radiation-curing lacquer layers can be provided between the top and bottom lacquer layers.
  • additional protective layers made of solvent-based 2-component polyurethane adhesive has been found to be partial.
  • the layers of lacquer forming the protective layers are suitably matched to one another in such a way that they form a highly resistant composite.
  • the composition of the bottom lacquer layer is selected so that optimal adhesion of the radiation-curing lacquer applied subsequently is ensured.
  • an adhesive layer or an adhesion promoter layer with an adhesive layer is also arranged above the top lacquer layer, via which the security element is fastened to the security paper or value document.
  • the protective layers are transparent and colorless. However, it is also possible to stain at least one of the protective layers. As a result, the security element can advantageously be provided with a slight color tint.
  • the security element advantageously has at least two metal layers on the plastic layer, which are arranged on the same surface and preferably directly adjoin one another at least in regions.
  • the metal layers do not have to be arranged in one plane of the security element, but can be arranged one above the other at least in regions. Three or more metal layers can also be which are arranged, wherein not all metal layers necessarily have to be arranged on the same surface of the security element. Various possible arrangements of the metal layers are described for example in DE 10226 116 AI, to which reference is expressly made here.
  • the protective layers are also applied on both sides, so that adequate protection against physical and chemical influences is ensured for each of the metal surfaces.
  • the metals can be, for example, aluminum, chromium, nickel, copper, gold, silver or other “non-ferrous metals” or colored metal alloys.
  • the metal layers can have cutouts in the form of alphanumeric characters, patterns, logos or the like.
  • the security element can be a security thread which consists of a self-supporting plastic film to which the metal layers are applied.
  • This security thread can be at least partially incorporated into a security paper or value document.
  • the plastic film of the security element may further with diffraction-optically effective surface structures, such as the like Refr relien, holograms, but also lattice structures (for example, Kinegram ®, pixels grams) or be provided.
  • Relief-like diffraction structures are preferred, in particular embossed diffraction structures.
  • the diffraction structures can be introduced directly into the plastic film. However, they can also be introduced, preferably embossed, into an additional plastic layer, for example a lacquer layer, applied to the plastic film.
  • the patterns that are visually visible on the basis of the diffraction structures can be designed in any way. Depending on the desired application or security level, simple geometric patterns on the one hand, but also complicated image motifs on the other hand are conceivable.
  • the security element can also be designed as a transfer element.
  • This variant is particularly advantageous if the security element is arranged completely on the surface of the security paper or value document.
  • the layer structure of the security element is prepared on a carrier film, usually a plastic film, and then transferred to the security paper or document of value in the desired outline contours in a hot stamping process.
  • a diffraction structure can of course be integrated into the layer structure of the security element.
  • the security element is arranged on the surface of the security paper or document of value, it can have any outline contours, such as round, oval, star-shaped, rectangular, trapezoidal or strip-shaped outline contours.
  • the security paper or value document to which the security element is applied has a continuous opening.
  • the security element is Richly arranged the opening and towering over it on all sides. In this case, the security element can be checked from the front and the back.
  • the use of the security element according to the invention is not limited to the area of security documents.
  • the security element according to the invention can also be used advantageously in the field of product security for counterfeiting security of any goods.
  • a first or lowermost protective layer is first applied in order to make contact with the underlying metal layer, and in a further step a further one Protective layer applied, bridging the existing imperfections in the layer below and thus protecting the metal layer (s) from physical and chemical influences.
  • the metal layers are preferably applied to the plastic layer using a vacuum vapor system, the individual metallic regions being produced in each case using masks.
  • the plastic layer can be in the form of a self-supporting plastic film or a carrier material on which the plastic layer is arranged.
  • cutouts in the respective metal layers are preferably produced using the methods as described in DE 10226116 A1, to which reference is expressly made here.
  • the layer of lacquer applied first is preferably dried before the application of a further layer of lacquer.
  • dryers are preferably used which have a hot air blower and / or an infrared radiator.
  • the final dryer preferably has power-controlled UV drying modules which are matched to the wavelength required for hardening the top lacquer layer and the layer thickness thereof.
  • the individual protective layers are applied to the metal layer (s) by suitable processes.
  • the protective layers can be printed on, painted on and painted on.
  • the protective layers are advantageously applied by gravure printing, by curtain coating and in coating machines.
  • the plastic film or the carrier material is provided in the form of an endless belt, the process being carried out continuously.
  • the plastic layer can be provided in the form of an endless plastic film to form a film material which, after the top layer has been applied and dried, is cut into security threads of a predetermined width.
  • the plastic layer is arranged on a specially prepared carrier material in order to To form transfer material, which is cut into strips of a predetermined width after the top layer has been applied and dried.
  • the defects of the first layer which generally occur can be bridged, as a result of which the corrosion resistance of the security element is improved. If a radiation-curing and in particular UV-drying lacquer layer is also applied, greater abrasion resistance can also be achieved.
  • FIG. 5 shows a cross section through a further variant of a security paper or value document according to the invention.
  • 1 shows a document of value according to the invention in supervision.
  • it is a banknote 1.
  • This banknote has a strip-shaped security element 2, which extends over the entire width of the banknote 1.
  • the entire surface of the security element 2 facing the viewer is metallic, the areas 3, 4 being covered with differently colored metals, which in the example shown are directly adjacent to one another and are arranged alternately.
  • the security element 2 shown in FIG. 1 is a diffraction-optical security element which consists of an embossed plastic layer and at least one metallic layer.
  • the banknote 1 shown in FIG. 1 has a security thread 10 which extends over the entire width of the banknote. This is at least partially embedded in the security paper, i.e. it is virtually woven into the paper during the formation of the security paper, so that it is freely accessible at regular intervals on the surface of the paper, as indicated by the hatched areas 11, and is completely embedded in the paper only in the intermediate areas.
  • FIG. 2 shows a cross section along the line AA in FIG. 1.
  • the bottom layer here shows the banknote substrate 31, which is preferably formed from cotton paper.
  • the plastic layer 5 into which the diffraction structure 6 is introduced can also be seen.
  • the differently colored metal layers 3, 4 are arranged alternately adjacent to one another.
  • a first protective layer 21, which can be formed, for example, from solvent-based 2-component polyurethane adhesive, is arranged directly adjacent to the metal layers. This is covered with a further protective layer 22, for example from the solvent based 2-component polyurethane adhesive or coated with a UV-drying protective lacquer.
  • the layers of the security element are attached to the document of value, here the banknote substrate 31, via an adhesive layer 30.
  • the protective lacquer never wets and runs perfectly with a simple layer application, so that generally no homogeneous, closed surface is obtained.
  • Such random defects 26, which can be present, for example, as cracks, holes, etc. make it possible for aggressive media to penetrate to the metal layer and cause corrosion there.
  • the defects 26 of the first protective layer 21 are bridged, as can be seen in FIG. 2.
  • the first protective layer 21 is applied in a somewhat smaller coating thickness than the second protective layer 22.
  • the reverse case is also conceivable, in which the first protective layer has a somewhat greater coating thickness than the subsequent protective layer (s).
  • the respective layer thicknesses must be sufficient to form an overall closed surface after all protective layers have been applied.
  • FIG. 3 shows a cross-section of a transfer material according to the invention, which is used to produce security elements on security papers,
  • This transfer material 13 consists of a carrier film 14 to which a plastic layer 15 is applied. Diffraction structures 6 are in shape in this plastic layer 15 a relief structure. The various metal layers 3, 4, 9, which have cutouts 7, 8, are arranged above them.
  • the first protective layer 21 borders directly on the diffraction structure 6. If the plastic layer 15 and the protective layer 21 have a very similar refractive index, the diffraction structure 6 can no longer be seen in these areas.
  • a further protective layer 22 adjoins the protective layer 21 and is applied in a somewhat smaller layer thickness.
  • the transfer material 13 also has an optional adhesive layer 16, which is activated during transfer to the corresponding security paper or value document by means of heat and pressure in the areas to be transferred, in order to cover the corresponding metal layers 3, 4, 9 including the protective layers 21, 22 and to fix the plastic layer 15 on the security paper or document of value.
  • the carrier film 14 is pulled off.
  • the carrier film can be provided with good adhesion properties by additional measures.
  • the security thread 20 consists of a carrier film 25, for example an artificial fabric film on which a metal layer 3 is arranged which has cutouts 17.
  • the first protective layer 21 borders directly on the carrier film 25.
  • two further protective layers 22, 23 are arranged, of which the uppermost protective layer 22 is, for example, a UV-drying lacquer layer, while the lower protective layers 21, 23 can be formed from solvent-based 2-component polyurethane adhesive.
  • the random distribution of the defects 26, 27 of the three protective layers 21, 22, 23 that occur means that the defects of the respective lower layer are essentially bridged by the subsequent layer (s), so that an overall closed surface is obtained that offers good protection against the ingress of aggressive media.
  • the security thread shown in FIG. 4 is also to have a diffraction structure, this can be introduced into the carrier film 25 or a separate plastic layer arranged between the carrier film 25 and the metal layer 3.
  • FIG. 5 shows a cross section through a further variant of a security paper or value document according to the invention.
  • a plastic layer 5 can be seen which has a diffraction structure 6. Adjacent to this is a metal layer 3, which in turn is adjacent to a first protective layer 21. Between this and the adhesive layer 30, via which the layers of the security element are attached to the document of value, here the banknote substrate 31, there are two further protective layers 23, 24.
  • the protective layers 21, 23 and 24 shown are formed from the same protective lacquer.

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  • Laminated Bodies (AREA)
  • Credit Cards Or The Like (AREA)
  • Materials For Medical Uses (AREA)
  • Paper (AREA)

Abstract

L'invention concerne un élément de sécurité pour papiers de sûreté, billets de banque, cartes d'identité, passeports et analogues, ainsi qu'un papier de sûreté et un document de valeur muni d'un tel élément de sécurité. L'élément de sécurité présente au moins une couche de matière plastique sur laquelle est disposée au moins une couche métallique, et est caractérisé en ce qu'au moins deux couches de protection sont appliquées superposées sur la couche métallique.
PCT/EP2004/010263 2003-09-19 2004-09-14 Element de securite et son procede de production WO2005034048A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE502004011340T DE502004011340D1 (de) 2003-09-19 2004-09-14 Sicherheitselement und verfahren zur herstellung desselben
AT04765177T ATE472784T1 (de) 2003-09-19 2004-09-14 Sicherheitselement und verfahren zur herstellung desselben
EP04765177A EP1668606B1 (fr) 2003-09-19 2004-09-14 Element de securite et son procede de production

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10343890A DE10343890A1 (de) 2003-09-19 2003-09-19 Sicherheitselement und Verfahren zur Herstellung desselben
DE10343890.4 2003-09-19

Publications (1)

Publication Number Publication Date
WO2005034048A1 true WO2005034048A1 (fr) 2005-04-14

Family

ID=34398852

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2004/010263 WO2005034048A1 (fr) 2003-09-19 2004-09-14 Element de securite et son procede de production

Country Status (4)

Country Link
EP (1) EP1668606B1 (fr)
AT (1) ATE472784T1 (fr)
DE (2) DE10343890A1 (fr)
WO (1) WO2005034048A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8794674B2 (en) 2008-03-07 2014-08-05 Giesecke & Devrient Gmbh Security element and method for the production thereof
EP3535134B1 (fr) 2016-11-01 2020-07-22 De La Rue International Limited Dispositifs de sécurité et leurs procédés de fabrication
EP3275685B2 (fr) † 2016-07-25 2023-07-19 Giesecke+Devrient Currency Technology GmbH Papier de sécurité, élément de sécurité et document de valeur

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4002979A1 (de) * 1990-02-01 1991-08-08 Gao Ges Automation Org Wertpapier mit optisch variablem sicherheitselement
EP0477535A2 (fr) * 1990-09-26 1992-04-01 GAO Gesellschaft für Automation und Organisation mbH Support de données multicouche et méthode de sa fabrication
US5714231A (en) * 1993-04-24 1998-02-03 Leonhard Kurz Gmbh & Co. Decorative layer structure and use thereof
WO2000076778A1 (fr) * 1999-06-15 2000-12-21 WHD elektronische Prüftechnik GmbH Caracteristique de securite variable optiquement
US20020003635A1 (en) * 2000-04-19 2002-01-10 Boswell David R. Holographic foil and method
DE10111848A1 (de) * 2001-03-01 2002-09-12 Whd Elektron Prueftech Gmbh Sicherheitsmerkmale

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4002979A1 (de) * 1990-02-01 1991-08-08 Gao Ges Automation Org Wertpapier mit optisch variablem sicherheitselement
EP0477535A2 (fr) * 1990-09-26 1992-04-01 GAO Gesellschaft für Automation und Organisation mbH Support de données multicouche et méthode de sa fabrication
US5714231A (en) * 1993-04-24 1998-02-03 Leonhard Kurz Gmbh & Co. Decorative layer structure and use thereof
WO2000076778A1 (fr) * 1999-06-15 2000-12-21 WHD elektronische Prüftechnik GmbH Caracteristique de securite variable optiquement
US20020003635A1 (en) * 2000-04-19 2002-01-10 Boswell David R. Holographic foil and method
DE10111848A1 (de) * 2001-03-01 2002-09-12 Whd Elektron Prueftech Gmbh Sicherheitsmerkmale

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8794674B2 (en) 2008-03-07 2014-08-05 Giesecke & Devrient Gmbh Security element and method for the production thereof
EP3275685B2 (fr) † 2016-07-25 2023-07-19 Giesecke+Devrient Currency Technology GmbH Papier de sécurité, élément de sécurité et document de valeur
EP3535134B1 (fr) 2016-11-01 2020-07-22 De La Rue International Limited Dispositifs de sécurité et leurs procédés de fabrication

Also Published As

Publication number Publication date
DE502004011340D1 (de) 2010-08-12
DE10343890A1 (de) 2005-05-04
ATE472784T1 (de) 2010-07-15
EP1668606B1 (fr) 2010-06-30
EP1668606A1 (fr) 2006-06-14

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