EP2344343B1 - Matériau de transfert d'élément de sécurité à support multicouche - Google Patents

Matériau de transfert d'élément de sécurité à support multicouche Download PDF

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Publication number
EP2344343B1
EP2344343B1 EP09778554.7A EP09778554A EP2344343B1 EP 2344343 B1 EP2344343 B1 EP 2344343B1 EP 09778554 A EP09778554 A EP 09778554A EP 2344343 B1 EP2344343 B1 EP 2344343B1
Authority
EP
European Patent Office
Prior art keywords
security
layer
temporary carrier
layer composite
composite
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
EP09778554.7A
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German (de)
English (en)
Other versions
EP2344343A1 (fr
Inventor
Winfried HOFFMÜLLER
André Gregarek
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.)
Giesecke and Devrient GmbH
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Giesecke and Devrient GmbH
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Publication date
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Publication of EP2344343A1 publication Critical patent/EP2344343A1/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
    • B42D25/40—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/328—Diffraction gratings; Holograms
    • 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
    • B42D25/351—Translucent or partly translucent parts, e.g. windows
    • 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
    • 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
    • B42D25/45—Associating two or more layers
    • B42D25/455—Associating two or more layers using heat
    • 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
    • B42D25/46—Associating two or more layers using pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
    • B44C1/16—Processes, not specifically provided for elsewhere, for producing decorative surface effects for applying transfer pictures or the like
    • B44C1/162—Decalcomanias with a transfer layer comprising indicia with definite outlines such as letters and with means facilitating the desired fitting to the permanent base
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
    • B44C1/16—Processes, not specifically provided for elsewhere, for producing decorative surface effects for applying transfer pictures or the like
    • B44C1/165—Processes, not specifically provided for elsewhere, for producing decorative surface effects for applying transfer pictures or the like for decalcomanias; sheet material therefor
    • B44C1/17—Dry transfer
    • B44C1/1712—Decalcomanias applied under heat and pressure, e.g. provided with a heat activable adhesive

Definitions

  • the invention relates to a security element transfer material having a security element layer composite, which has a plurality of layers, and a temporary support, which is detachably connected to the security element layer composite, for transferring security elements to a valuable article, such as a security paper, a value document or a brand name, to authenticate the valuables.
  • the invention also relates to methods of making the security element transfer material, to methods of transferring a security element from the security element transfer material to a valuable item, and to valuables secured against counterfeiting using the security element transfer material.
  • Valuables such as branded goods or documents of value, in particular banknotes, are often provided with security elements which allow verification of the authenticity of the object of value and at the same time serve as protection against unauthorized reproduction.
  • the security elements used for this purpose are not provided individually, but in the form of transfer belts with a plurality of security elements designed as transfer elements.
  • Characteristic of transfer belts is that the security elements are prepared on a carrier layer, wherein the order of the layers of the transfer elements must be reversed, as it should be present later on the object to be protected.
  • the carrier layer is typically removed from the layer structure of the security elements during transfer.
  • the transfer tapes On the opposite side of the carrier layer, the transfer tapes have an adhesive layer, usually of a heat-sealing adhesive, which melts during the transfer of the security elements and glued the security elements with the object to be secured.
  • the transfer ribbon is applied to the article with the heat seal adhesive layer applied and pressed by means of a heated transfer punch or a transfer roller and transferred in the outline of the heated transfer punch on the object.
  • Transfer elements, transfer ribbons and the transfer of transfer elements to target substrates are for example in EP 0 420 261 B1 and WO 2005/108108 A2 described.
  • the individual transfer elements can already be prefabricated in the desired outline shape on the transfer belt.
  • the prefabrication of separate individual security elements is particularly useful if the security elements have a layer structure which makes exact separation of the entire layer structure during the transfer process difficult. This is usually the case when the layer structure of the security element to be transmitted contains a carrier substrate, for example a plastic film.
  • Support substrates within the layer construction of security elements are required when the security elements have to be made particularly stable, for example when they have to be self-supporting, because they are to be used for closing a through opening in the object to be secured. Depending on the object and size of the opening to be closed, high demands can be placed on the stability of the security elements.
  • Banknotes for example, are exposed to high stresses during their orbit, are tapped, kinked and possibly exposed to moisture.
  • the security elements must be able to withstand these stresses as well as the banknote paper itself, since otherwise there would be the danger that after a certain circulation time the through opening in the banknote would be exposed.
  • Security elements whose layer construction comprises a stable carrier substrate, typically a plastic film, must be present on a transfer material as prefabricated individual elements, which means that the outline shapes of the security elements in the security element material must be precut beforehand.
  • the pre-cutting can be carried out for example by means of a laser. This results in the problem that the cutting depth must be controlled very precisely, on the one hand to cut through the entire layer structure of the security element, on the other hand, the carrier material that is separated during the transfer, not to hurt.
  • support materials usually plastic films are used. Although plastic films have a high tear resistance, but a low tear resistance. When they are cut, it is almost unavoidable that the security element transfer material in the form of continuous material tears on valuables in some places during the transfer process of the security elements.
  • the layer structures to be cut or the carrier sheets which are not to be cut are materials with thicknesses in the micrometer range.
  • the security element laminates typically have thicknesses in the range of about 20 ⁇ m to 30 ⁇ m
  • the carrier foils typically have thicknesses in the range of 10 ⁇ m to 20 ⁇ m.
  • the object of the present invention is therefore to avoid the disadvantages of the prior art and to provide a security element transfer material in the form of a continuous material, pre-cut in the security elements in the desired outline shapes, and then the precut elements to be secured without risk of tearing the substrate Products can be transferred.
  • a security element transfer material in the form of a continuous material in which the security element layer composite comprises a carrier substrate which gives the security elements sufficient stability to make them suitable as cover elements via through openings in valuables.
  • the object is achieved by the security element transfer material according to the main claim. Further objects of the invention are methods of making the security element transfer material, methods of transferring a security element from the security element transfer material to a valuable article, and a valuable article secured using the security element transfer material with a security element as set forth in the independent claims are indicated. Specific embodiments of the invention are set forth in the respective dependent claims.
  • the security element transfer material is typically a continuous material, usually a belt several hundred meters in length and a width of a few millimeters / centimeter to several meters.
  • the security element transfer material has a security element layer composite, ie the actual security element material, and a temporary carrier, ie the material on which the security elements are "stored".
  • the security element laminate has a plurality of layers, including a permanent support substrate, typically a plastic film, a feature layer, and a peek layer.
  • a permanent support substrate typically a plastic film
  • a feature layer typically a feature layer
  • a peek layer typically a packet stream.
  • the term "one (one, one, one)" in the present invention is to be understood as "at least one”. If necessary, the security element layer composite can therefore also contain a plurality of permanent carrier substrates and / or a plurality of feature layers.
  • the security element layer network usually contains several feature layers.
  • a feature layer (or functional layer) is a layer that has visually detectable or machine detectable features.
  • Examples which may be mentioned are metal layers, layers of metallic effect paints, layers with color pigments or fluorescent pigments, liquid crystal layers, coatings with a color shift effect, layers with matt structures, as described, for example, in US Pat WO 2007/107235 A1 Colored printed motif layers, layer combinations such as a color-shaded color shift layer, magnetic pigment layers, etc. are not shown.
  • the materials, layer sequences and types of application are not limited in any way and basically all materials and methods are applicable a person skilled in the field of security elements are known.
  • the term "permanent" carrier substrate expresses that this carrier substrate is not removed during the transfer of the security element on an object to be secured, but rather is part of the security element layer composite and is transferred to the object to be secured.
  • the security elements are preferably to be used for covering through openings, wherein the presence of an opening should remain recognizable, it is preferred use transparent or translucent permanent carrier substrates.
  • films of polyester, such as polyethylene terephthalate, of polyethylene or polypropylene are suitable.
  • the viewing layer may be identical to a feature layer or the permanent carrier substrate.
  • a suitable layer structure for the security element layer composite is, by way of example only and in no way limiting, that of the so-called L-LEAD (Longlasting Economical Anticopy Device) security elements of Giesecke & Devrient GmbH.
  • Such security elements have a layer structure with numerous functional layers (feature layers), including a z. Holographic security feature, print accepting, protective and laminating layers, ink layers, fluorescent imprints, etc.
  • the L-LEAD security elements also have a permanent carrier substrate.
  • the security element laminate is connected to a temporary support either directly or by means of a release layer.
  • the release layer is conventional and facilitates the detachment of the security elements from the temporary carrier during the transfer process to a valuable item.
  • the temporary support is located on the side of the security element layer composite facing an observer after the transmission of the security elements.
  • the temporary carrier consists of a carrier layer composite.
  • the carrier layer composite consists of at least two temporary carrier substrates, which by means of an adhesive layer are firmly connected.
  • temporary carrier substrates expresses that, in contrast to the "permanent" carrier substrate, these carrier substrates are not part of the security elements.
  • Suitable materials for the temporary carrier substrates are, as in the case of the permanent carrier substrate, also plastic films, it being of course irrelevant here whether the films are transparent or not.
  • the films should be as thin as possible, ie have thicknesses in the range of up to about 20 microns, but be stable and preferably stretchable, which facilitates a precise transmission of the security elements in the machine transfer process. With regard to the thickness of the temporary carrier substrates is still to be noted that these may be thicker than about 20 microns in an individual case, namely z. B., when the temporary carrier substrate is formed by connecting two films or film structures.
  • the temporary carrier substrates of the carrier layer composite are adhesively bonded together by means of an adhesive layer.
  • Insoluble in this context means that the bond can not be solved in the transfer process of the security elements or in any processing or treatment processes of the security element transfer material.
  • the transfer to valuables usually takes place through a heat sealing process, which is why thermoplastic adhesives are less suitable unless they have very high softening temperatures.
  • thermoplastic adhesives are less suitable unless they have very high softening temperatures.
  • z. B. solvent-based 2-component PU adhesives whose temperature stability is usually sufficiently large.
  • These adhesives are generally cross-linked but not radiation-curable.
  • radiation-curing adhesives in particular adhesives which are curable by UV radiation or by electron radiation. Details of the suitable laminating adhesives are known to the person skilled in the art.
  • Self-healing adhesives are adhesives that cure only slowly, so that an adhesive layer damaged during the curing process is still reactive enough to reverse the damage in the course of the further curing process. Suitable adhesives tend to be in the class of cationic curing adhesives because cationic radiation curing is a relatively slow process that will continue for some time after the end of irradiation.
  • the inventive construction of the temporary carrier as a carrier layer composite avoids that when cutting the outline of the security elements, the stability of the temporary carrier is affected by cutting the temporary carrier.
  • a comparable result can not be achieved simply by designing a single temporary carrier film to be correspondingly thicker, since, as already mentioned, plastic films have a low tear propagation resistance, ie. H. if a film is even slightly truncated, it easily rips further and may completely through.
  • the situation is different with the layer composite according to the invention: Even if one of the temporary carrier substrates is completely severed, the further temporary carrier substrate (or possibly the other temporary carrier substrates) generally remains undamaged and accordingly stable.
  • the adhesive also forms an additional "buffer zone" between the temporary carrier substrates.
  • a self-healing adhesive is used and cutting the contours of the security elements is performed at a time when the adhesive has not yet fully cured, cuts in the adhesive layer are reformed.
  • the still plastic adhesive can even penetrate into the temporary carrier substrates in sections and fill them in whole or in part or at least glue them to such an extent that the stability of the trimmed temporary carrier substrates does not appreciably suffer.
  • the cutting of the outline shapes of the security elements is preferably carried out by means of a laser, as this allows the best precision to be achieved.
  • the term "cutting" generally means all methods known to a person skilled in the art for delimiting the individual security elements from the endless material, for example punching.
  • additional measures are preferably taken which are suitable for preventing a deep cutting of the laser.
  • Such measures are, for example, the provision of a laser protection layer between the first temporary carrier substrate and the adhesive layer and / or between the second temporary carrier substrate and the adhesive layer.
  • the temporary carrier substrates can be vapor-deposited with a laser-absorbing or a laser-reflecting material.
  • the adhesive between the temporary carrier substrates with laser-absorbing or laser-reflecting substances, for example with metal pigments, thereby protecting the underlying temporary carrier substrate.
  • the temporary carrier typically consists of a carrier layer composite with two temporary carrier substrates, which are connected by means of an adhesive layer.
  • the carrier layer composite may also comprise more than two temporary carrier substrates, wherein in each case two temporary carrier substrates are connected by means of an adhesive layer. It is essential that the adhesive bonds ensure that the temporary carrier always holds together as a layer composite and can be separated from the security elements even when transferring the security elements to valuables as a complete layer composite.
  • the laminate structure of the temporary support optionally with a self-healing adhesive and / or laser protection layer (s) and / or laser-absorbing or laser-reflecting substances in the adhesive layer makes it possible to form the temporary support as a whole comparatively thin, therefore flexible and yet extremely stable.
  • the layer thicknesses for the temporary carrier, d. H. the carrier layer composite are preferably in the range of 20 microns to 40 microns.
  • the production of the security element transfer material according to the invention can take place in different ways.
  • the Production of the security element layer composite takes place in a conventional manner.
  • the temporary carrier is produced by bonding the temporary carrier substrates by means of an adhesive layer.
  • the adhesives for bonding the temporary carrier substrates and bonding the security element laminate to the temporary carrier are selected such that the adhesive bond between the temporary carrier substrates can not be released under security element transfer conditions (typically heat sealing) while the bond between Security element layer composite and temporary carrier is easily solved.
  • the security element layer composite is first produced in a conventional manner and constructed on the security element layer composite of the temporary carrier.
  • a first substance is first applied to the viewing layer of the security element layer composite (the layer which later faces a viewer) and a temporary carrier substrate is glued thereto.
  • a further adhesive is applied and glued to this another temporary carrier substrate.
  • further temporary carrier substrates can be adhered. It is essential that the adhesives be chosen so that the security element layer composite can be easily detached from the carrier layer composite, while the carrier layer composite always and especially under security element transmission conditions remains firmly bonded, as described in the previous variant.
  • the first adhesive thus forms a so-called "release layer".
  • the temporary carrier is produced and then the security element layer composite is constructed thereon, layer by layer.
  • the temporary carrier is made by non-detachably bonding at least two, and preferably two temporary carrier substrates to a carrier layer composite.
  • the security element layer composite is constructed in a conventional manner, wherein first on one of the temporary carrier substrates, a release layer can be applied and then the first security element layer (the later facing the viewer viewing layer) is then applied.
  • the release layer may also be omitted in this type of fabrication if the type of gaze layer in the security element transfer process permits easy separation from the temporary support.
  • the viewing layer is a lacquer layer with low adhesion to plastic films, as they are used for the temporary carrier substrates.
  • Suitable lacquers are, for example, the embossing lacquers used for embossing diffraction structures.
  • the temporary carrier substrate to be coated can also be pre-treated to reduce adhesion.
  • the above-mentioned embodiment is presently preferred over the other production variants, in particular if the security element layer composite without a release layer is arranged on the temporary carrier substrate.
  • the second temporary carrier substrate and the first temporary carrier substrate are glued together only after the viewing layer and further layers of the security element subelement have been arranged on the first temporary carrier, whereby the second temporary carrier substrate is protected from thermal or radiation stresses, in particular in connection with the embossing of the embossing lacquer layer.
  • the second temporary carrier substrate and the further layers of the security element partial element z. B. a permanent carrier substrate to apply substantially simultaneously.
  • an embossing lacquer layer according to the method described in US Pat EP 1 879 154 A2 applied method described.
  • the embossing lacquer layer is applied wet-to-wet in several steps, ie a first embossing lacquer layer is first applied to the temporary support, the first layer optionally partially, but not completely, cured, then a second embossing lacquer layer and optionally further embossing lacquer layers applied, then at least the top layer of the coating is embossed with a microstructure, and then cured the entire coating.
  • the microstructure can be equipped with a suitable coating, for example metallized.
  • the disclosure content of EP 1 879 154 A2 in this respect included in the present description.
  • embossing lacquer layer directly on the temporary support without the interposition of a heat-activatable release layer avoids the problem that under certain circumstances an undefined cleavage of the release layer takes place. Release layers can also cause problems if the gaze shift occurs after the security element has been transferred a value object further treated, for example, printed, should be. Overprinting of release layers or of layers which have residues of release layers often leads to unclean print images.
  • a heat-seal adhesive layer is preferably applied for bonding to a valuable article.
  • Suitable heat seal adhesives are known to a person skilled in the art. Preference is given to using heat-sealable adhesives which after physical drying or, in the case of hotmelt adhesives, after cooling, form substantially tack-free coatings at room temperature. Such heat seal adhesives are preferred because the security element transfer material is not usually used immediately after production, but is stored, which requires winding of the continuous material. A tack free hot-melt adhesive layer would result in blocking of the wound security-element transfer-material webs.
  • Tack free is when security element transfer material pieces of about 100 cm 2 , stacked and weighted at 10 kg and stored for 72 hours at 40 ° C, are then easily separable without damage.
  • the heat-seal adhesive layer it is generally to be noted that this is advantageously applied only after the necessary steps have been performed for connecting the security element sub-element layers or the layers of the temporary carrier substrate. Since the joining of said layers usually takes place at elevated temperature and / or pressure, it makes sense to apply the heat- and / or pressure-sensitive hot-seal adhesive layer only after joining these layers.
  • the security element transfer material can now be stored temporarily or processed immediately.
  • the later security elements are cut out, i. H. the outline shapes of the later security elements are cut into the security element layer composite, wherein the cuts preferably completely cut through the entire security element layer composite.
  • "Cutting" in this context includes any form of cutting, so for example, punching.
  • the most precise and therefore most preferred type of cutting is cutting with a laser. Even when laser cutting, however, it can not be avoided that the temporary carrier is cut. However, if the temporary carrier is designed according to the invention as a layer composite, cutting the layer composite does not have the effects of impairing the stability of the composite layer as a whole.
  • the cutting process can be controlled so precisely that at least the farthest away from the security element layer composite temporary carrier substrate remains intact and keeps the temporary support stable.
  • additional measures can be taken to stabilize the temporary carrier or to prevent deep cutting, such as the use of self-healing adhesives and the application of laser protective layers already described above. It is understood that when using a self-healing adhesive, the cutting of the security element outline should be done at a time when the adhesive has not yet fully cured.
  • a precise control of the cutting process can take place in that a temporary carrier substrate or an adhesive layer has a laser-sensitive dye.
  • the color of the laser-sensitive dye beats due to the laser energy and / or the wavelength the laser to, or the laser-sensitive dye reacts to the heat generated during laser cutting, for example by evaporation.
  • Variability 1 for precise control of the cutting process The temporary carrier substrate (18 in the below Fig. 4b ), which must not be damaged by the laser, is provided with a laser-sensitive dye. Nevertheless, if the temporary carrier substrate is damaged by the laser, the dye discolors, which can be detected by a sensor. In this way, the area with the damaged temporary carrier substrate can be marked as scrap, ie as goods to be sorted out. Furthermore, in this way, a message to the machine operator that the tolerance limit is exceeded and the laser must be readjusted, for example by the laser power is reduced and / or the deflection speed of the laser is increased. The term deflection speed here is to be understood as the speed with which the laser is guided over the workpiece. A readjustment of the laser can also be done automatically via a suitable sensor.
  • Variability 2 for precise control of the cutting process The adhesive layer (19 in the below Fig. 4b ) of the carrier layer composite, which may be last damaged by the laser before the laser damages a temporary carrier substrate lying under the adhesive layer, is provided with a laser-sensitive dye. If the dye discolors, this can be detected by a sensor. In this way, a message to the operator can be made that is working close to the tolerance limit and the laser must be readjusted, for example by the laser power withdrawn and / or the deflection speed of the laser is increased. A readjustment of the laser can also be done automatically via a suitable sensor.
  • Variability 3 for precise control of the cutting process The security element layer composite is connected to the temporary carrier via a release layer (9 in the below-described Fig. 4d ), which must be damaged by the laser.
  • the release layer is provided with a laser-sensitive dye. If the dye does not discolour, the cutting process is incomplete and the area marked as scrap. In this way, a message to the operator can be made that the tolerance falls below the limit and the laser must be readjusted, for example by the laser power increases and / or the deflection speed of the laser is reduced. A readjustment of the laser can also be done automatically via a suitable sensor.
  • Variability 4 for precise control of the cutting process Within a carrier layer composite with several adhesive layers, the adhesive layer (17 "in the below-described Fig. 5 ), which may be damaged by the laser, provided with a laser-sensitive dye. If the dye discolors, this can be detected by a sensor and a message is sent to the machine operator that work is being carried out close to the tolerance limit and must be readjusted, for example by increasing the laser power and / or reducing the deflection speed of the laser. A readjustment of the laser can also be done automatically via a suitable sensor.
  • the excess security-element laminate ie, the laminate outside the outlines of the security features, is removed, leaving only the security features themselves are the temporary carrier, the security elements on the temporary carrier so spaced apart.
  • the security element transfer material now consists of the temporary support with the security elements formed as transfer elements, ie the layer order of the security elements is the reverse of the layer order that exists after the transfer of the security elements on the protected object.
  • Removal of the excess security element laminar material is also referred to as "feathering" because the excess security element laminar material forms a continuous grid (with recesses in the form of the security elements remaining on the temporary carrier) which peels / removes from the temporary carrier analogously to a separation coil can be.
  • the transfer of the security elements from the security element transfer material to valuables preferably takes place by heat sealing.
  • both the security element transfer material and the valuable article are preferably used as band material.
  • the band materials are brought together in the appropriate position, for example in a nip, whereby the security elements stick to the valuables.
  • the bonding takes place by means of hot-seal adhesive, ie at elevated temperature.
  • the temporary carrier is separated as a complete carrier layer composite of the transmitted security elements, for example by separation winding.
  • the security elements can have any shapes and in themselves any sizes. Preferred embodiments are labels, Folienpatche or other planar security elements.
  • the dimensions are significantly influenced by the protected object of value.
  • the security elements preferably have a thickness of 1 ⁇ m to 100 ⁇ m, particularly preferably a thickness of 2 ⁇ m to 50 ⁇ m. These are the preferred thicknesses of the security elements in the provision of valuable documents and security papers with security elements, because they are easy to handle. In terms of area, formats of a few square millimeters to a few square centimeters or larger are generally advisable.
  • the security element transfer material according to the invention is basically suitable for product security of goods of any kind, in particular for the authenticity assurance of security papers and value documents.
  • security paper is understood to mean a precursor that can not yet be processed to a value document, which besides the security element can have further authenticity features.
  • Security paper is lying Usually as continuous material before and will be further processed at a later date.
  • Value documents are in particular banknotes, certificates, checks, identity documents, identity cards, credit cards and the like.
  • the security element transfer material according to the invention which has security elements which due to their permanent carrier substrate have a particular stability, is used to close through openings in value documents.
  • the permanent carrier substrate of the security elements is transparent, the functional layers (feature layers) can be designed such that a viewer can see through the security element at least in some areas.
  • An opening in a security paper or document of value may already be generated during the production of the security paper or document of value and then has a fibrous, irregular edge. Such an edge is characteristic of the openings already made during sheet formation and can not be subsequently produced. Details of the preparation of such irregular edges of the document WO 03/054297 A2 are removed, the disclosure of which is included in the present description.
  • the opening is produced only after papermaking by punching or cutting, for example by laser beam cutting.
  • Fig. 1 shows a security element transfer material of the prior art, shown in cross section along the line AA 'of Fig. 2 ,
  • the security element transfer material has a temporary carrier 16 and a security element layer composite 15 consisting of the feature layers 4, 5 and 2, the permanent carrier substrate 3, an adhesive layer 6, a primer layer 7 and a heat-seal adhesive layer 8.
  • the feature layer 4 is the Mahtik, ie after the transfer of security elements to valuables, it faces the viewer.
  • the layer 4 here is a liquid crystal layer applied over part of the area, the areas 4 'being the liquid crystal areas.
  • Another feature layer is a metallized hologram, consisting of the embossing lacquer layer 5 and the vapor-deposited metal layer 2.
  • the metal layer 2 has recesses 2 ', which form a negative writing.
  • the metallization 2 is provided substantially only in the areas of the security element transfer material forming the later security elements.
  • the security element layer composite 15 and the temporary carrier 16 are connected by means of a release layer 9, to which, as already mentioned, can also be dispensed with in a particularly advantageous embodiment.
  • the lines 20 and 20 indicate how the security element laminate is cut to pre-cut the security elements in their outline shapes. As can be seen, the cuts 20 and 20 'penetrate into the plastic film forming the temporary support 16. The plastic film is destabilized by the cuts and can easily tear at the points of incisions with slight strains, as they are practically unavoidable in the course of the transfer process of the security elements.
  • a security element transfer material in which the security elements are pre-cut is not seen Fig. 1 shown as a cross section of a portion along the line AA ', or to a security element transfer material 1 according to the invention, as in FIGS. 4a to 4d and Fig. 5 , each represented as a cross section of a portion along the line AA ', is.
  • Fig. 3 is a plan view of a document of value, which has a security element 10 of a security element transfer material 1 according to the invention.
  • the FIGS. 2 and 3 will be explained later in more detail.
  • Fig. 4a shows a cross section through a portion of a security element transfer material 1 according to the invention along the line AA 'of Fig. 2 ,
  • the illustration corresponds to the representation of the security element transfer material of the prior art of Fig. 1
  • the structure of the security element laminate 15 is the same as that in FIG Fig. 1 illustrated security element transfer material of the prior art.
  • the security element layer composite 15 is connected to a temporary carrier 16 by means of a release layer 9, wherein the release layer 9, as already mentioned, can also be dispensed with in a particularly advantageous embodiment.
  • this is not a single film but a carrier layer composite comprising a first temporary carrier substrate 17 and a second temporary carrier substrate 18, which are non-detachably connected by means of an adhesive layer 19.
  • the two temporary carrier substrates are plastic films, for example films PET, and the adhesive layer 19 consists of a cationic radiation-curable adhesive, for example UVCS0002 from XSYS.
  • 2K PU systems are particularly suitable as adhesives.
  • the security element layer composite 15 has a total thickness of about 25 microns
  • the PET films 17 and 18 each have a thickness of about 12 microns
  • the adhesive layer 19 has a thickness of about 3 microns in the dry state.
  • FIGS. 4b to 4d each show the same view as Fig. 4a but in further processing states of the security element transfer material 1 according to the invention.
  • Fig. 4b shows the security element transfer material, after using a CO 2 laser (wavelength 10,600 nm), the outline forms 21 (see Fig. 2 ) of the later security elements 10 were cut into the security element layer composite 15.
  • the cuts are shown as lines 20, 20 '.
  • the cut 20 cuts through not only the security element layer composite 15 but also the first temporary carrier substrate 17, and at the point 20 'the cut penetrates far into the adhesive layer 19.
  • the security element transfer material 1 when the outline shapes 21 have been cut at a point in time at which the adhesive of the layer 19 has not yet completely hardened, after a certain time the outline in FIG Fig. 4c illustrated state. How out Fig. 4c As can be seen, the incision 20 'in the adhesive layer 19 is completely cured. The cuts 20 and 20 'in the temporary carrier substrate 17 are still clearly visible, but if the cutting of the outline shapes occurs early enough, the adhesive of the layer 19 is still sufficiently fluid and reactive that it at least a little way into the cuts of the temporary carrier substrate 17 penetrates and glued the cuts.
  • Fig. 4d shows the security elements 10.
  • the security elements 10 in Fig. 2 represented as their outlines 21, now represent "islands" on the temporary support 16. The islands are surrounded by areas 22 where there is no longer any security element laminar material.
  • Fig. 2 shows the security element transfer material 1 according to the invention as an endless belt, in which only one security element is located in the direction of the width. In practice, the endless belts may be wider and include a plurality of juxtaposed security elements.
  • Fig. 5 shows a specific embodiment of the security element transfer material 1 according to the invention, wherein a state is shown, which corresponds to the in Fig. 4b shown state corresponds.
  • the temporary carrier 16 consists of three temporary carrier substrates 17 ', 17 "' and 18, which are permanently connected by means of adhesive layers 17" and 19 to a carrier layer composite.
  • the layers 17 ', 17 "and 17"' are each very thin, and the adhesive layer 17 "contains copper in pigment form which reflects laser beams to limit the depth of cut As can be seen, at least the cut 20 'does not penetrate deeply into the temporary Carrier 16.
  • the temporary carrier 16 remains sufficiently stable with three temporary carrier substrates as long as the outermost carrier substrate 18 is not cut.
  • an embossing lacquer layer 5 Immediately on the temporary carrier 16 is an embossing lacquer layer 5 after the in EP 1879154 A2 described method by application of two embossing lacquer coats that were coined and cured, produced.
  • the metallization 2 was vapor-deposited by physical vapor deposition.
  • Fig. 3 shows a banknote 30, which has a through opening 31.
  • the through opening 31 is closed with a foil patch 10, which has a larger area than the through opening 31.
  • the foil patch 10 is a security element made from a security element transfer material 1 according to the invention, as shown in FIGS FIGS. 4a to 4d is shown.
  • the banknote 30 has yet another security element, the security thread 40, on.
  • the security elements 10 must be prefabricated in the security element transfer material 1 in the appropriate sizes and distances. Under elevated temperature and elevated pressure, a security element 10 is glued to a banknote 30 in each case.

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  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
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  • Credit Cards Or The Like (AREA)

Claims (13)

  1. Matériau de transfert d'élément de sécurité (1) comportant
    - un composite de couches d'élément de sécurité (15) qui comporte une pluralité de couches ayant au moins une couche à caractéristiques (2; 4), un substrat porteur permanent (3) et une couche visuelle (4), la couche visuelle étant la couche qui, après le transfert d'un élément de sécurité (10) sur un objet de valeur (30), est tournée vers un observateur, et la couche visuelle pouvant être identique à une couche à caractéristiques ou au substrat porteur permanent, et
    - un support temporaire (16) qui est joint de manière séparable à la couche visuelle (4) du composite de couches d'élément de sécurité (15), cependant que
    - le support temporaire (16) comporte un composite de couches de support consistant en un premier (17) et en un deuxième (18) substrat porteur temporaire qui sont collés de manière indétachable au moyen d'une couche de colle (19), et des formes de contour (21) des éléments de sécurité (10) sont prédécoupées dans le composite de couches d'élément de sécurité (15), les découpes (20, 20') sectionnant le cas échéant partiellement ou entièrement le premier substrat porteur (17) temporaire et sectionnant le cas échéant partiellement ou entièrement la couche de colle (19), mais ne pénétrant pas dans le deuxième substrat porteur (18) temporaire, de telle sorte que le support temporaire (16) peut être séparé en tant que composite de couches de support complet.
  2. Matériau de transfert d'élément de sécurité (1) selon la revendication 1, caractérisé en ce que la couche de colle (19) consiste en une colle auto-réparatrice, de préférence en une colle durcissant par rayonnement cationique.
  3. Matériau de transfert d'élément de sécurité (1) selon la revendication 1, caractérisé en ce que, depuis le composite de couches d'élément de sécurité (15), le matériau de composite de couches se trouvant en dehors des formes de contour (21) des éléments de sécurité (10) est enlevé, de telle sorte que le matériau de transfert d'élément de sécurité (1) comporte des interstices (22) dans le composite de couches d'élément de sécurité (15), tandis que le support temporaire (16) ne comporte pas d'interstices.
  4. Matériau de transfert d'élément de sécurité (1) selon une des revendications de 1 à 3, caractérisé en ce que la couche visuelle (4) est une couche de vernis de gaufrage qui est réalisée directement sur le support temporaire (16).
  5. Procédé de fabrication d'un matériau de transfert d'élément de sécurité (1) qui comprend un composite de couches d'élément de sécurité (15) et un support temporaire (16), comportant les étapes suivantes :
    - fabrication du support temporaire (16) et
    - mise en place du composite de couches d'élément de sécurité (15) sur le support temporaire (16), le composite de couches d'élément de sécurité (15) comportant une pluralité de couches ayant au moins une couche à caractéristiques (2; 4), un substrat porteur permanent (3) et une couche visuelle (4), la couche visuelle étant la couche qui, après le transfert d'un élément de sécurité (10) sur un objet de valeur (30), est tournée vers un observateur, et la couche visuelle pouvant être identique à une couche à caractéristiques ou au substrat porteur permanent, cependant que
    - le support temporaire (16) est fabriqué par collage indétachable d'un premier (17) et d'un deuxième (18) substrat porteur temporaire au moyen d'une couche de colle (19) de manière à obtenir un composite de couches de support, et
    - le composite de couches d'élément de sécurité (15) est mis en place par jonction séparable de la couche visuelle (4) et du premier substrat porteur (17) temporaire et application des autres couches du composite de couches d'élément de sécurité (15) sur la couche visuelle (4) jointe de manière séparable au premier substrat porteur (17) temporaire, et
    - dans le composite de couches d'élément de sécurité (15), des formes de contour (21) des éléments de sécurité (10) sont découpées, cependant que, de préférence, pour la fabrication de la couche de colle (19) du support temporaire (16), c'est une colle auto-réparatrice qui est utilisée, et que les formes de contour (21) sont découpées tant que la colle n'est pas encore durcie.
  6. Procédé de fabrication d'un matériau de transfert d'élément de sécurité (1) qui comprend un composite de couches d'élément de sécurité (15) et un support temporaire (16), comportant les étapes suivantes :
    - fabrication du composite de couches d'élément de sécurité (15), le composite de couches d'élément de sécurité (15) comportant une pluralité de couches ayant au moins une couche à caractéristiques (2; 4), un substrat porteur permanent (3) et une couche visuelle (4), la couche visuelle étant la couche qui, après le transfert d'un élément de sécurité (10) sur un objet de valeur (30), est tournée vers un observateur, et la couche visuelle pouvant être identique à une couche à caractéristiques ou au substrat porteur permanent,
    - fabrication du support temporaire (16), et
    - jonction du composite de couches d'élément de sécurité (15) et du support temporaire (16), cependant que
    - le support temporaire (16) est fabriqué par collage indétachable d'un premier (17) et d'un deuxième (18) substrat porteur temporaire au moyen d'une couche de colle (19) de manière à obtenir un composite de couches de support, et
    - la jonction du composite de couches d'élément de sécurité (15) et du support temporaire (16) a lieu par fabrication d'une jonction collée détachable entre la couche visuelle (4) du composite de couches d'élément de sécurité (15) et le premier substrat porteur (17) temporaire du support temporaire (16), et
    - dans le composite de couches d'élément de sécurité (15), des formes de contour (21) des éléments de sécurité (10) sont découpées, cependant que, de préférence, pour la fabrication de la couche de colle (19) du support temporaire (16), c'est une colle auto-réparatrice qui est utilisée, et que les formes de contour (21) sont découpées tant que la colle n'est pas encore durcie.
  7. Procédé de fabrication d'un matériau de transfert d'élément de sécurité (1) qui comprend un composite de couches d'élément de sécurité (15) et un support temporaire (16), comportant les étapes suivantes :
    - fabrication du composite de couches d'élément de sécurité (15), le composite de couches d'élément de sécurité comportant une pluralité de couches ayant au moins une couche à caractéristiques (2; 4), un substrat porteur permanent (3) et une couche visuelle (4), la couche visuelle étant la couche qui, après le transfert d'un élément de sécurité (10) sur un objet de valeur (30), est tournée vers un observateur, et la couche visuelle pouvant être identique à une couche à caractéristiques ou au substrat porteur permanent, et
    - mise en place du support temporaire (16) sur le composite de couches d'élément de sécurité (15), le support temporaire (16) étant mis en place par
    - collage détachable d'un premier substrat porteur (17) temporaire avec la couche visuelle (4) du composite de couches d'élément de sécurité (15), et
    - collage indétachable d'un deuxième substrat porteur (18) temporaire avec le premier substrat porteur (17) temporaire au moyen d'une couche de colle (19), et
    - dans le composite de couches d'élément de sécurité (15), des formes de contour (21) des éléments de sécurité (10) sont découpées, cependant que, de préférence, pour la fabrication de la couche de colle (19) du support temporaire (16), c'est une colle auto-réparatrice qui est utilisée, et que les formes de contour (21) sont découpées tant que la colle n'est pas encore durcie.
  8. Procédé selon la revendication 5, caractérisé en ce que la couche visuelle (4) est constituée par une couche de vernis de gaufrage qui est directement mise en place sur le support temporaire (16).
  9. Procédé selon une des revendications de 5 à 8, caractérisé en ce que le matériau de composite de couches du composite de couches d'élément de sécurité (15) se trouvant en dehors des formes de contour (21) des éléments de sécurité (10) est enlevé du matériau de transfert d'élément de sécurité (1).
  10. Procédé de transfert d'un élément de sécurité (10) d'un matériau de transfert d'élément de sécurité (1) sur un objet de valeur (30) tel qu'un papier de sécurité, un document de valeur ou un article de marque, comportant les étapes suivantes :
    - accolement d'un matériau de transfert d'élément de sécurité (1) selon une des revendications de 1 à 4 et de l'objet de valeur (30),
    - compression du matériau de transfert d'élément de sécurité (1) dans la zone de l'élément de sécurité (10) à transférer et de l'objet de valeur (30), le cas échéant à température élevée, et
    - séparation du support temporaire (16), en tant que composite de couches de support complet, de l'élément de sécurité (10) transféré.
  11. Objet de valeur (30) tel que papier de sécurité ou document de valeur, qui, par utilisation d'un matériau de transfert d'élément de sécurité (1) selon une des revendications de 1 à 4, est équipé d'un élément de sécurité (10).
  12. Objet de valeur (30) selon la revendication 11, caractérisé en ce que l'objet de valeur comporte une ouverture (31) continue et en ce que l'élément de sécurité (10) est placé des telle façon qu'il ferme essentiellement l'ouverture (31) continue.
  13. Objet de valeur (30) selon la revendication 12, caractérisé en ce que l'objet de valeur est un billet de banque à ouverture (31) continue, le substrat porteur permanent (3) étant de préférence transparent ou translucide et la couche à caractéristiques (2) comportant une écriture en négatif (2').
EP09778554.7A 2008-09-17 2009-09-16 Matériau de transfert d'élément de sécurité à support multicouche Active EP2344343B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008047641A DE102008047641A1 (de) 2008-09-17 2008-09-17 Sicherheitselement-Transfermaterial mit mehrschichtigem Träger
PCT/EP2009/006694 WO2010031543A1 (fr) 2008-09-17 2009-09-16 Matériau de transfert d'élément de sécurité à support multicouche

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EP2344343A1 EP2344343A1 (fr) 2011-07-20
EP2344343B1 true EP2344343B1 (fr) 2016-01-27

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DE (1) DE102008047641A1 (fr)
WO (1) WO2010031543A1 (fr)

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DE102008047641A1 (de) 2010-04-15
WO2010031543A1 (fr) 2010-03-25

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