EP0768957B2 - Blocking foil, in particular hot-blocking foil with decorative or warranty elements - Google Patents

Blocking foil, in particular hot-blocking foil with decorative or warranty elements Download PDF

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Publication number
EP0768957B2
EP0768957B2 EP95921699A EP95921699A EP0768957B2 EP 0768957 B2 EP0768957 B2 EP 0768957B2 EP 95921699 A EP95921699 A EP 95921699A EP 95921699 A EP95921699 A EP 95921699A EP 0768957 B2 EP0768957 B2 EP 0768957B2
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EP
European Patent Office
Prior art keywords
layer
decorative
adhesive layer
transfer
areas
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.)
Expired - Lifetime
Application number
EP95921699A
Other languages
German (de)
French (fr)
Other versions
EP0768957B1 (en
EP0768957A1 (en
Inventor
Joachim Süss
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.)
Leonhard Kurz Stiftung and Co KG
Original Assignee
Leonhard Kurz GmbH and Co KG
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Application filed by Leonhard Kurz GmbH and Co KG filed Critical Leonhard Kurz GmbH and Co KG
Publication of EP0768957A1 publication Critical patent/EP0768957A1/en
Application granted granted Critical
Publication of EP0768957B1 publication Critical patent/EP0768957B1/en
Publication of EP0768957B2 publication Critical patent/EP0768957B2/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B41M1/24—Inking and printing with a printer's forme combined with embossing
    • 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
    • B44C1/1729—Hot stamping techniques
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/913—Material designed to be responsive to temperature, light, moisture
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/16—Two dimensionally sectional layer
    • Y10T428/162—Transparent or translucent layer or section
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24479—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
    • Y10T428/24612—Composite web or sheet
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
    • Y10T428/24851—Intermediate layer is discontinuous or differential
    • Y10T428/24868—Translucent outer layer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
    • Y10T428/24917—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] including metal layer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y10T428/254—Polymeric or resinous material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
    • Y10T428/269—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension including synthetic resin or polymer layer or component
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
    • Y10T428/2804—Next to metal
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
    • Y10T428/2839—Web or sheet containing structurally defined element or component and having an adhesive outermost layer with release or antistick coating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31551—Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
    • Y10T428/31565—Next to polyester [polyethylene terephthalate, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31786—Of polyester [e.g., alkyd, etc.]

Definitions

  • the invention relates to an embossing film, in particular hot stamping film, consisting of a carrier film and a transfer layer which can be detached therefrom and which, starting from the carrier film, is at least a transparent one Protective lacquer layer, comprising a decorative or securing element formed by at least one layer Decorative layer structure and an adhesive layer used to determine the transfer position on a substrate has, wherein a release layer is provided between the carrier film and the transfer layer.
  • stamping foils in particular hot stamping foils
  • the transfer layer is exposed to heat and pressure from the carrier film transferred to a substrate on which the corresponding transfer layer by means of the adhesive layer, which is in the is generally a hot glue or a radiation-curable glue.
  • the transfer layer should not be transferred to the substrate over the entire area but only certain areas of the transfer layer, for example decorative elements that are in the transfer layer are produced in a manner known per se by means of printing processes etc.
  • securing elements for example to securities such as banknotes, credit cards, ID cards etc. or other Securing objects are also used to a large extent in hot stamping foils. It is important that only the respective securing element or the area of the transmission position corresponding to the securing element detached from the carrier film and fixed on the substrate.
  • Another disadvantage is that generally tearing transfer layers along the edge of the stamp are not mechanically resistant, which e.g. for a security element, but also for a decorative element, means that when using the corresponding object it is often after a very short time is destroyed as a result of mechanical influences.
  • the invention is therefore based on the object of designing an embossing film, in particular hot stamping film, in such a way that that without special measures, a precise registration of individual areas of the transmission situation is possible in the form of decorative or securing elements on a substrate, being used for transfer no specially shaped stamps are required on the substrate, but instead rolls or rollers are used, for example can be.
  • the transmission position much more stable and thus mechanically more stable.
  • an embossing foil in particular hot stamping foil, is proposed according to the invention of the type mentioned at the beginning train according to claim 1.
  • an embossing film for transferring a decoration onto a substrate in which one is provided on a separate carrier film provided adhesive layer. Because the transfer layer and the adhesive layer are arranged on two different carrier foils, the exact transfer of individual elements from the Transfer situation only possible to a limited extent, since the transfer must take place in two steps, firstly the transfer of the Adhesive layer and secondly the transfer of the transfer layer.
  • a transfer film is also known from EP 0 413 819, in which in particular a metallic gloss Pattern is transferred to a substrate, the shape of this pattern being determined by the shape of the adhesive layer because the transfer layer and thus the metal layer is only transferred to the substrate at the points, on which an adhesive layer is provided.
  • An embodiment of a transfer film is disclosed in which the adhesive layer and the overlying metal layer correspond to each other. This is made possible in a complex process in which a metal layer is first applied over the entire surface to a corresponding base, the following is provided with an adhesive layer in a predetermined pattern. In a further step it will not metal layer covered by the adhesive layer is removed with an acidic or alkaline etching solution. In the known transfer film, the release layer has the entire surface intended.
  • the adhesive layer and the release layer ensures that the transfer layer only where there is an adhesive layer on the Substrate adheres. It is therefore irrelevant whether there is any pressure on the transfer layer outside of the adhesive layer is exercised. Nevertheless, only the area of the transfer layer that corresponds to the adhesive layer on the Stick substrate. This means that the application of the transfer layer to the substrate is largely independent is of the shape of the tool used for pressing or, if necessary, heating.
  • a decoration or the like in some areas. of a substrate in a continuous process e.g. by means of rollers or rollers.
  • Embossing foil according to the invention can also be seen in the fact that the areas match perfectly existing adhesive layer achieved with the areas of the transfer layer to be transferred without difficulty can be, because usually both the various layers of the transfer layer and the adhesive layer in be applied using a printing process. As is well known, the perfect alignment of various, superimposed layers no difficulties.
  • Another advantage of the procedure according to the invention is that embossing foils according to the invention also for substrates with a very rough surface, for example Paper with excellent adhesion and physico-chemical resistance can be produced.
  • embossing film according to the invention thus offers both considerable advantages over what has been customary up to now Advantages with regard to the tools that can be used for transferring to the substrate, and above all with regard to the accuracy in the delimitation of the areas of the transfer layer to be applied to the substrate.
  • the embossing film according to the invention with the only partially provided adhesive layer in one Many cases the use of mechanically much more stable layers for the transfer layer. Self if in such a case during the transfer the limitation of the area applied to the substrate the transfer layer is not clean, can very easily in a further operation possibly over the adhesive layer protruding transfer layer material are removed, because in the area of the adhesive layer Transfer layer adheres very firmly to the substrate.
  • the release layer is only provided in regions and in register with the adhesive layer, causes the transfer layer in the areas where there is no peel layer is present, these areas coinciding with the areas where no adhesive layer is provided, comparatively adheres firmly to the carrier film, whereby the tearing off or the separation of the transfer layer along the Edge of the area to be transferred is supported.
  • the protective lacquer layer can be formed by a lacquer on the Backing film adheres well outside the areas covered by the release layer, a measure that is also a supports clean separation along the edge of the areas of the transfer layer to be transferred.
  • the arrangement of the spatial structures in register with the adhesive layer ensures a perfect fit Alignment and clean delimitation of the spatial structures is achieved and this especially in the Do not fray the area of its edge, which may have given the entire appearance of a securing element as well as further processing, e.g. Printing of the value document could be affected.
  • the spatial ones can be used in a manner known per se Structured side of the protective lacquer layer have a coating whose optical properties differ differ from those of the protective lacquer layer, the coating being in particular of a reflective one Material, preferably metal, is formed.
  • the spatial structures are generally arranged in register with the adhesive layer are, it is particularly advantageous if the coating is carried out over the entire surface, and this is because coatings Apply much easier over the entire surface and above all without additional measures or work steps to let. Nevertheless, the full-surface coating usually does not interfere because of the layer thickness of such coatings are so small that they are easily transferred along the edge of the adhesive layer when transferred to the substrate supporting areas tear.
  • the coating can be used for particularly high quality films can also be partially and in register with the spatial structure, in order to create a particularly clean boundary to reach the transferred layers.
  • the release layer to cover the areas of the adhesive layer and / or the decorative or securing elements protrude on all sides by at least 0.2 mm.
  • the protective lacquer layer and the release layer over the decorative or securing elements and at the same time over the adhesive layer offers the advantage that the protective roof layer closely follows the edge during the transfer process Substrate is applied, with the protruding area of the protective lacquer layer generally also working perfectly on Substrate adheres because the adhesive layer, due to its thickness, even if it is only small, nevertheless during the transfer process pressed together and thus pressed outwards in the direction of the edge of the protective lacquer layer.
  • the hot stamping foil according to the exemplary embodiment comprises a carrier film 1, for example a polyester film with a thickness of approx. 20 ⁇ m.
  • a release layer 2 is applied in a layer thickness of approximately 0.01 to 0.1 ⁇ m.
  • the protective lacquer layer 3 has a layer thickness of 0 8 to 2.5 microns, preferably from 1.2 to 1.7 microns.
  • the transparent protective lacquer layer is used to form securing elements, but possibly only to form decorative elements in the for transfer to the substrate certain areas with a diffraction-optically effective spatial structure 4, where the spatial structures 4 by corresponding replication or embossing by means of a corresponding master on the surface 5 of the protective lacquer layer facing away from the carrier film 1.
  • the Protective lacquer layer 3 and the corresponding introduction of the spatial structures 4 the entire free surface of the partially finished stamping film is provided with a coating 6, preferably a suitable, reflective one Metal is evaporated in a vacuum.
  • the thickness of the coating 6 depends on the material used for this is used. If it is metal, it is on the order of a few nm, namely 5 - 50 nm (50-500 ⁇ ), preferably 10-20 nm (100-200 ⁇ ).
  • the coating 6 can also, for example, from one Dielectric be formed which 3 different optical properties compared to the material of the protective lacquer layer has. Depending on the type of material, the layer thickness of the coating 6 may well be be much larger.
  • the top layer (in the drawing) of the hot stamping foil of the exemplary embodiment only forms one regionally applied adhesive layer 7, the adhesive layer 7 being provided essentially only in the regions is in which decorative or securing elements, so in the embodiment shown, the spatial Structures 4, are present.
  • the adhesive layer 7 is usually in a layer thickness of 3.0 to 10.0 microns, preferably 4.0 to 6.0 ⁇ m.
  • the release layer 2 is only applied in some areas, specifically in the Areas in which the spatial structure 4 to form the decorative or securing elements on the protective lacquer layer 3 and the adhesive layer 7 are provided.
  • the figure shows that the release layer 2 the spatial Structure 4 or the adhesive layer 7 by a dimension a, which should be at least 0.2 mm, on all sides.
  • the hot stamping foils according to the exemplary embodiment are produced per se from the manufacture of hot stamping foils in a known manner such that the release layer 2 and the protective lacquer layer on the carrier film 1 3 are applied in a printing process with the appropriate layer thickness or distribution.
  • the protective lacquer layer 3 is either thermoplastic or consists of a lacquer that only under the influence of certain radiation or after fully cures after a certain time after networking.
  • a thermoplastic protective lacquer layer 3 spatial structure 4 embossed under the influence of heat by means of matrices known per se. If the protective lacquer layer 3 a under the influence of certain radiation, e.g. of UV radiation, or hardening after a certain time Is lacquer layer, one brings the spatial structure 4 in a replication process in the surface 5 of the Protective lacquer layer 3 as long as the lacquer forming layer 3 has not yet fully hardened.
  • the film thus partially completed is then provided with the coating 6, for example aluminum in appropriate thickness evaporated in vacuo.
  • the coating 6 can be both full and partial and be formed in register with the spatial structure 4.
  • This is then followed, again in a printing process, areas of the adhesive layer 7 applied, the registration of the adhesive layer 7 with respect to the release layer 2 or the spatial structure 4 by appropriate scanning of the already on the Carrier film 1 existing layers takes place.
  • the release layer 2, which is present in some areas is mixed with a suitable maritime pigment.
  • the stamping foils according to the invention are applied with the adhesive layer applied in regions pressed against a substrate in advance, the pressure being applied, for example, by means of a full-surface steel wheel, but can also be done with a suitable segment wheel. Under correspondingly high pressure and at a suitable one Temperature then dissolves, supported by the release layer 2, the overall transfer position designated 8, which consists at least of a protective lacquer layer 3, the coating 6 and the adhesive layer 7, of the carrier film 1. and essentially only in the areas in which an adhesive layer 7 is provided.
  • stamping foils according to the invention are not designed as hot stamping foils but for cold processing are determined, i.e. the adhesive layer is already sticky even at room temperature, there is the possibility of the carrier film 1 on the side facing away from the transfer layer 8 to be provided with a corresponding coating which adhesion of the secondary layer 7 to the carrier film 1 is prevented when the films are wound up.

Landscapes

  • Decoration By Transfer Pictures (AREA)
  • Laminated Bodies (AREA)
  • Duplication Or Marking (AREA)
  • Adhesive Tapes (AREA)
  • Adornments (AREA)
  • Credit Cards Or The Like (AREA)

Abstract

PCT No. PCT/DE95/00784 Sec. 371 Date Dec. 20, 1996 Sec. 102(e) Date Dec. 20, 1996 PCT Filed Jun. 10, 1995 PCT Pub. No. WO96/01187 PCT Pub. Date Jan. 18, 1996There is disclosed a hot stamping foil assembly, in particular a hot stamping foil, which has spatial decorative or security elements formed in a region-wise manner. An adhesive layer is provided only in a region-wise manner and in matching relationship with respect to the spatial elements to effect transfer of the spatial decorative or security elements or other decorative layer structure.

Description

Die Erfindung betrifft eine Prägefolie, insbesondere Heissprägefolie, bestehend aus einem Trägerfilm und einer von diesem ablösbaren Übertragungslage, welche - ausgehend vom Trägerfilm - zumindest eine transparente Schutzlackschicht, einen von wenigstens einer Schicht gebildeten, Dekorations- oder Sicherungselemente umfassenden Dekorschichtaufbau sowie eine zu Festlegung der Übertragungslage auf einem Substrat dienende Klebeschicht aufweist, wobei zwischen Trägerfilm und Übertragungslage eine Ablöseschicht vorgesehen ist.The invention relates to an embossing film, in particular hot stamping film, consisting of a carrier film and a transfer layer which can be detached therefrom and which, starting from the carrier film, is at least a transparent one Protective lacquer layer, comprising a decorative or securing element formed by at least one layer Decorative layer structure and an adhesive layer used to determine the transfer position on a substrate has, wherein a release layer is provided between the carrier film and the transfer layer.

Derartige Prägefolien, insbesondere Heissprägefolien, sind in den unterschiedlichsten Ausführungsformen bekannt. Bei ihrer Anwendung wird die Übertragungslage unter Einwirkung von Wärme und Druck von dem Trägerfilm auf ein Substrat übertragen, an dem die entsprechende Übertragungslage mittels der Klebeschicht, bei der es sich im allgemeinen um einen Heisskleber oder einen durch Strahlung härtbaren Kleber handelt, haftet. In einer Vielzahl von Anwendungsfällen ist es nun so, dass die Übertragungslage nicht vollflächig auf das Substrat übertragen werden soll sondern nur bestimmte Bereiche der Übertragungslage, beispielsweise Dekorationselemente, die in der Übertragungslage in an sich bekannter Weise mittels Druckverfahren etc. erzeugt sind. Besonders für die Aufbringung von Sicherungselementen, beispielsweise auf Wertpapiere, wie Banknoten, Kreditkarten, Ausweise etc. oder sonstige zu sichernde Gegenstände werden ebenfalls in grossem Umfange Heissprägefolien verwendet. Dabei ist es wichtig, dass nur das jeweilige Sicherungselement bzw. der dem Sicherungselement entsprechende Bereich der Übertragungslage vom Trägerfilm gelöst und auf dem Substrat festgelegt wird.Such stamping foils, in particular hot stamping foils, are in the most varied of embodiments known. When used, the transfer layer is exposed to heat and pressure from the carrier film transferred to a substrate on which the corresponding transfer layer by means of the adhesive layer, which is in the is generally a hot glue or a radiation-curable glue. In a variety of It is now the case that the transfer layer should not be transferred to the substrate over the entire area but only certain areas of the transfer layer, for example decorative elements that are in the transfer layer are produced in a manner known per se by means of printing processes etc. Especially for the application of securing elements, for example to securities such as banknotes, credit cards, ID cards etc. or other Securing objects are also used to a large extent in hot stamping foils. It is important that only the respective securing element or the area of the transmission position corresponding to the securing element detached from the carrier film and fixed on the substrate.

Bisher geht man im allgemeinen, wenn nur eine bereichsweise Übertragung der Übertragungslage auf das Substrat gewünscht wird, so vor, dass die Prägefolie mittels entsprechend geformter Stempel gegen die Unterlage gedrückt wird. Nur im Bereich der Stempel wird dann auf die Übertragungslage der erforderliche Druck ausgeübt, wodurch erreicht werden soll, dass auch nur der vom Stempel beaufschlagte Teil der Übertragungslage an dem Substrat haftet, während der Rest der Übertragungslage mit dem Trägerfilm abgezogen wird.So far, one goes in general, if only a partial transfer of the transfer situation to the Substrate is desired, so that the stamping foil by means of appropriately shaped stamp against the base is pressed. The required pressure is then only exerted on the transfer layer in the area of the stamp, whereby it should be achieved that only the part of the transfer layer on the substrate acted upon by the stamp adheres while the rest of the transfer layer is peeled off with the carrier film.

Diese Vorgehensweise hat etliche Nachteile. Zum einen hat sich gezeigt, dass die gerade bei der Herstellung von grossen Stückzahlen, beispielsweise beim Banknotendruck, erforderlichen hohen Arbeitsgeschwindigkeiten und infolgedessen grossen Übertragungsleistungen sich in einfacher Weise nur erreichen lassen, wenn zum Aufbringen des Prägefolien-Abdruckes auf das Substrat Rollverfahren angewendet werden. Hierbei bereitet es Schwierigkeiten, Rollen so auszubilden, dass ihre Oberfläche durch entsprechend erhabene Bereiche einzelne Stempel bildet. Bei dieser Art des Arbeitens ergeben sich weiterhin Probleme hinsichtlich der genauen Ausrichtung des zu übertragenden Dekorations- bzw. Sicherungselementes mit dem für die Übertragung jeweils verwendeten Stempelbereich.This procedure has several disadvantages. On the one hand, it has been shown that this is precisely the case during production of large quantities, for example when printing banknotes, required high working speeds and As a result, large transmission capacities can only be achieved in a simple manner if they are used of the stamping foil impression can be applied to the substrate rolling process. Here it is difficult To design rolls so that their surface forms individual stamps through correspondingly raised areas. At this The way of working still gives rise to problems regarding the precise alignment of the data to be transferred Decorative or securing element with the stamp area used for the transfer.

Wenn nur Bereiche der Übertragungslage vom Trägerfilm mittels eines Stempels auf das Substrat übertragen werden sollen, ergibt sich weiterhin das Problem, dass nur ganz bestimmte Materialien für die Übertragungslage verwendet werden können. Die Materialien müssen ja so ausgewählt werden, dass die Übertragungslage entlang der Stempelkante sauber abreisst, wobei ausserdem durch spezielle Auswahl der Ablöseschicht zwischen Übertragungslage und Trägerfilm dafür gesorgt werden muss, dass sich die Übertragungslage in den Bereichen, die auf das Substrat übertragen werden sollen, leicht vom Trägerfilm löst, jedoch in den anderen Bereichen einwandfrei am Trägerfilm haftet. Vor allem dann, wenn bei einem derartigen Arbeiten die Temperatur- und Druckverhältnisse nicht genau stimmen, kommt es bisher sehr häufig vor, dass man keinen sauberen Abriss der Übertragungslage entlang des Stempelrandes erhält. Weiterhin ist nachteilig, dass entlang des Stempelrandes leicht reissende Übertragungslagen im allgemeinen mechanisch wenig widerstandsfähig sind, was z.B. bei einem Sicherheitselement, aber auch bei einem Dekorationselement, bedeutet, dass es bei Gebrauch des entsprechenden Gegenstandes häufig schon nach sehr kurzer Zeit infolge mechanischer Einwirkungen zerstört ist.If only areas of the transfer layer are transferred from the carrier film to the substrate using a stamp there is still the problem that only very specific materials are used for the transfer layer can be. The materials have to be selected so that the transfer position along the The edge of the stamp tears off cleanly, with a special selection of the release layer between the transfer layer and carrier film must be ensured that the transfer layer in the areas that are on the substrate should be transferred, easily detached from the carrier film, but adheres perfectly to the carrier film in the other areas. Especially if the temperature and pressure conditions are not exactly correct when working in this way, So far, it has been very common for the transfer layer not to be torn off cleanly along the edge of the stamp receives. Another disadvantage is that generally tearing transfer layers along the edge of the stamp are not mechanically resistant, which e.g. for a security element, but also for a decorative element, means that when using the corresponding object it is often after a very short time is destroyed as a result of mechanical influences.

Es ist weiterhin bereits der Versuch unternommen worden, hier Verbesserungen dadurch zu erreichen, dass Prägefolien ohne Klebeschicht eingesetzt wurden, wobei dann der Kleber in den zu dekorierenden Bereichen des Substrates angebracht und mittels des Klebers die Übertragungslage von der Prägefolie abgelöst wurde. Bei einem derartigen Vorgehen kann man zwar mit glatten Rollen zur Aufbringung von Druck und Wärme arbeiten. Es bestehen jedoch in gleicher Weise wie bei der Verwendung von Stempeln die Probleme hinsichtlich der Zusammensetzung der Übertragungslage, die auch bei diesem Verfahren so aufgebaut sein muss, dass sie entsprechend leicht reisst, was aber wiederum geringe mechanische Festigkeit zur Folge hat. Auch die Probleme der mangelhaften Passerung zwischen Kleber und den Dekorations- bzw. Sicherungselementen der Übertragungslage werden auf diese Weise nicht beseitigt.Attempts have continued to be made to improve this by: Embossing foils without an adhesive layer were used, with the adhesive then in the areas of the substrate to be decorated attached and the transfer layer was detached from the stamping foil by means of the adhesive. With such a You can work with smooth rollers to apply pressure and heat. However, there are in the same way as with the use of stamps, the problems regarding the composition of the transfer layer, which must also be structured in such a way that it tears easily, which in turn low mechanical strength. Also the problems of poor registration between Glue and the decorative or securing elements of the transfer layer are not removed in this way.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Prägefolie, insbesondere Heissprägefolie, derart auszubilden, dass ohne besondere Massnahmen eine passergenaue Übertragung von einzelnen Bereichen der Übertragungslage in Form von Dekorations- oder Sicherungselementen auf ein Substrat möglich ist, wobei zur Übertragung auf das Substrat keine besonders geformten Stempel erforderlich sind sondern beispielsweise Rollen oder Walzen eingesetzt werden können. Darüberhinaus soll es bei einem Vorgehen gemäss der Erfindung auch möglich sein, die Übertragungslage wesentlich stabiler und damit mechanisch beständiger auszubilden.The invention is therefore based on the object of designing an embossing film, in particular hot stamping film, in such a way that that without special measures, a precise registration of individual areas of the transmission situation is possible in the form of decorative or securing elements on a substrate, being used for transfer no specially shaped stamps are required on the substrate, but instead rolls or rollers are used, for example can be. In addition, it should also be possible in a procedure according to the invention, the transmission position much more stable and thus mechanically more stable.

Zur Lösung dieser Aufgabe wird nach der Erfindung vorgeschlagen, eine Prägefolie, insbesondere Heissprägefolie der eingangs erwähnten Art gemäß Anspruch 1 auszubilden. To achieve this object, an embossing foil, in particular hot stamping foil, is proposed according to the invention of the type mentioned at the beginning train according to claim 1.

Aus der EP 0 461 475 ist eine Prägefolie zum Übertragen eines Dekors auf ein Substrat bekannt, bei dem eine auf einer separaten Trägerfolie vorgesehene Klebeschicht vorgesehen ist. Da die Übertragungslage und die Klebeschicht auf zwei verschiedenen Trägerfolien angeordnet sind, ist das genaue Übertragen einzelner Elemente aus der Übertragunslage nur begrenzt möglich, da das Übertragen in zwei Schritten erfolgen muß, erstens der Übertragung der Klebeschicht und zweitens der Übertragung der Übertragungslage.From EP 0 461 475 an embossing film for transferring a decoration onto a substrate is known, in which one is provided on a separate carrier film provided adhesive layer. Because the transfer layer and the adhesive layer are arranged on two different carrier foils, the exact transfer of individual elements from the Transfer situation only possible to a limited extent, since the transfer must take place in two steps, firstly the transfer of the Adhesive layer and secondly the transfer of the transfer layer.

Aus der EP 0 413 819 ist weiterhin eine Transferfolie bekannt, bei der insbesondere ein metallisch glänzendes Muster auf ein Substrat übertragen wird, wobei die Form dieses Musters durch die Form der Klebeschicht bestimmt wird, da die Übertragungslage und damit auch die Metallschicht nur an den Stellen auf das Substrat übertragen wird, an denen eine Klebeschicht vorgesehen ist. Es ist eine Ausführungsform einer Transferfolie offenbart, bei der Klebeschicht und darüber liegende Metallschicht einander entsprechen. Dies wird in einem aufwendigen Verfahren ermöglicht, in dem zuerst auf einer entsprechenden Unterlage eine Metallschicht vollflächig aufgebracht wird, die nachfolgend in einem vorgegebenen Muster mit einer Klebeschicht versehen wird. In einem weiteren Schritt wird dann die nicht durch die Klebeschicht abgedeckte Metallschicht mit einer sauren oder alkalischen Ätzlösung entfernt. Bei der bekannten Transferfolie ist die Ablöseschicht ganzflächig vorgesehen.A transfer film is also known from EP 0 413 819, in which in particular a metallic gloss Pattern is transferred to a substrate, the shape of this pattern being determined by the shape of the adhesive layer because the transfer layer and thus the metal layer is only transferred to the substrate at the points, on which an adhesive layer is provided. An embodiment of a transfer film is disclosed in which the adhesive layer and the overlying metal layer correspond to each other. This is made possible in a complex process in which a metal layer is first applied over the entire surface to a corresponding base, the following is provided with an adhesive layer in a predetermined pattern. In a further step it will not metal layer covered by the adhesive layer is removed with an acidic or alkaline etching solution. In the known transfer film, the release layer has the entire surface intended.

Wesentlich bei den erfindungsgemässen Prägefolien ist somit, dass infolge einer nur bereichsweisen Anbringung der Klebeschicht und der Ablöseschicht gewährleistet ist, dass die Übertragungslage nur dort, wo Klebeschicht vorhanden ist, an dem Substrat haftet. Es spielt somit keine Rolle, ob ggf. auch ausserhalb der Klebeschicht Druck auf die Übertragungslage ausgeübt wird. Trotzdem kann nur der Bereich der Übertragungslage, der mit der Klebeschicht übereinstimmt, an dem Substrat haften. Dies bedeutet, dass die Aufbringung der Übertragungslage auf das Substrat weitgehend unabhängig von der Form des zum Anpressen bzw. ggf. Erhitzen verwendeten Werkzeuges ist. Bei Einsatz einer Prägefolie nach der Erfindung ist es daher beispielsweise möglich, eine bereichsweise Dekoration bzw. Etikettierung od.dgl. eines Substrates in einem kontinuierlichen Verfahren, z.B. mittels Rollen oder Walzen, vorzunehmen. Ein weiterer Vorzug der Prägefolie nach der Erfindung ist auch darin zu sehen, dass eine einwandfreie Übereinstimmung der bereichsweise vorhandenen Klebeschicht mit den zu übertragenden Bereichen der Übertragungslage ohne Schwierigkeiten erzielt werden kann, weil üblicherweise sowohl die diversen Schichten der Übertragungslage als auch die Klebeschicht in einem Druckverfahren aufgebracht werden. Beim Drucken bereitet bekanntlich die einwandfreie Ausrichtung verschiedener, aufeinanderliegender Schichten keine Schwierigkeiten. Ein weiterer Vorteil beim Vorgehen gemäss der Erfindung ist der, dass Prägefolien gemäss der Erfindung auch für Substrate mit sehr rauher Oberfläche, beispielsweise Papier, mit ausgezeichneter Haftung und physikalisch-chemischer Beständigkeit hergestellt werden können.It is therefore essential in the case of the embossing foils according to the invention that they are applied only in certain areas the adhesive layer and the release layer ensures that the transfer layer only where there is an adhesive layer on the Substrate adheres. It is therefore irrelevant whether there is any pressure on the transfer layer outside of the adhesive layer is exercised. Nevertheless, only the area of the transfer layer that corresponds to the adhesive layer on the Stick substrate. This means that the application of the transfer layer to the substrate is largely independent is of the shape of the tool used for pressing or, if necessary, heating. When using an embossing foil after the invention, it is therefore possible, for example, a decoration or the like in some areas. of a substrate in a continuous process, e.g. by means of rollers or rollers. Another advantage of Embossing foil according to the invention can also be seen in the fact that the areas match perfectly existing adhesive layer achieved with the areas of the transfer layer to be transferred without difficulty can be, because usually both the various layers of the transfer layer and the adhesive layer in be applied using a printing process. As is well known, the perfect alignment of various, superimposed layers no difficulties. Another advantage of the procedure according to the invention is that embossing foils according to the invention also for substrates with a very rough surface, for example Paper with excellent adhesion and physico-chemical resistance can be produced.

Der Einsatz einer Prägefolie nach der Erfindung bietet somit gegenüber dem bisher Üblichen sowohl erhebliche Vorzüge hinsichtlich der zum Übertragen auf das Substrat verwendbaren Werkzeuge, als auch vor allem hinsichtlich der Genauigkeit in der Abgrenzung der auf das Substrat aufzubringenden Bereiche der Übertragungslage. Weiterhin gestattet die Prägefolie nach der Erfindung mit der nur bereichsweise vorgesehenen Klebeschicht in einer Vielzahl von Fällen die Verwendung von mechanisch wesentlich stabileren Schichten für die Übertragungslage. Selbst wenn in einem derartigen Fall während des Übertragens die Begrenzung des auf das Substrat aufgebrachten Bereiches der Übertragungslage nicht sauber ist, kann sehr leicht in einem weiteren Arbeitsgang eventuell über die Klebeschicht überstehendes Übertragungslagen-Material entfernt werden, da im Bereich der Klebeschicht die Übertragungslage sehr fest am Substrat haftet.The use of an embossing film according to the invention thus offers both considerable advantages over what has been customary up to now Advantages with regard to the tools that can be used for transferring to the substrate, and above all with regard to the accuracy in the delimitation of the areas of the transfer layer to be applied to the substrate. Furthermore, the embossing film according to the invention with the only partially provided adhesive layer in one Many cases the use of mechanically much more stable layers for the transfer layer. Self if in such a case during the transfer the limitation of the area applied to the substrate the transfer layer is not clean, can very easily in a further operation possibly over the adhesive layer protruding transfer layer material are removed, because in the area of the adhesive layer Transfer layer adheres very firmly to the substrate.

Da erfindungsgemäss die Ablöseschicht nur bereichsweise und passerhaltig zur Klebeschicht vorgesehen ist, wird bewirkt, dass die Übertragungslage in den Bereichen, wo keine Ablöseschicht vorhanden ist, wobei diese Bereiche mit den Bereichen übereinstimmen, wo keine Klebeschicht vorgesehen ist, vergleichsweise fest am Trägerfilm haftet, wodurch das Abreissen bzw. die Abtrennung der Übertragungslage entlang des Randes des zu übertragenden Bereiches unterstützt wird.Since, according to the invention, the release layer is only provided in regions and in register with the adhesive layer, causes the transfer layer in the areas where there is no peel layer is present, these areas coinciding with the areas where no adhesive layer is provided, comparatively adheres firmly to the carrier film, whereby the tearing off or the separation of the transfer layer along the Edge of the area to be transferred is supported.

Erfindungsgemäss kann die Schutzlackschicht von einem Lack gebildet sein, der an dem Trägerfilm ausserhalb der von der Ablöseschicht bedeckten Bereiche gut haftet, eine Massnahme, die ebenfalls eine saubere Trennung entlang des Randes der zu übertragenden Bereiche der Übertragungslage unterstützt.According to the protective lacquer layer can be formed by a lacquer on the Backing film adheres well outside the areas covered by the release layer, a measure that is also a supports clean separation along the edge of the areas of the transfer layer to be transferred.

Vor allem als Sicherheitselemente werden in jüngerer Zeit häufig beugungsoptisch wirksame, räumliche Strukturen verwendet, da diese sich nur vergleichsweise schwer fälschen lassen und auch beim Versuch des Kopierens besondere Effekte ergeben können. In diesem Zusammenhang wird erfindungsgemäss vorgeschlagen, dass die Dekorations- oder Sicherungselemente von in der Schutzlackschicht auf deren dem Trägerfilm abgekehrter Seite ausgebildeten, beugungsoptisch wirksamen, räumlichen Strukturen gebildet sind, die passerhaltig zur Klebeschicht angeordnet sind. Die zusätzliche Anordnung solcher Sicherheitselemente in einer transparenten Schutzlackschicht ist bekannt. Wesentlich ist jedoch, dass durch die passerhaltige Anordnung der räumlichen Strukturen zur Klebeschicht eine einwandfreie Ausrichtung und saubere Begrenzung der räumlichen Strukturen erreicht wird und diese insbesondere im Bereich ihres Randes nicht fransen, wodurch bisher unter Umständen das gesamte Erscheinungsbild eines Sicherungselementes sowie die weitere Verarbeitung, z.B. Bedruckung des Wertdokumentes beeinträchtigt werden konnte.Especially as security elements, spatial structures that have an optical diffraction effect have recently become common used because these are relatively difficult to forge and also when trying to copy can produce special effects. In this context, it is proposed according to the invention that the decorative or securing elements of the protective lacquer layer on the side facing away from the carrier film, Diffractive-optical effective spatial structures are formed, which are in register with the adhesive layer are. The additional arrangement of such security elements in a transparent protective lacquer layer is known. It is essential, however, that the arrangement of the spatial structures in register with the adhesive layer ensures a perfect fit Alignment and clean delimitation of the spatial structures is achieved and this especially in the Do not fray the area of its edge, which may have given the entire appearance of a securing element as well as further processing, e.g. Printing of the value document could be affected.

Zur verbesserten Sichtbarkeit der räumlichen Strukturen kann, in an sich bekannter Weise, die die räumlichen Strukturen aufweisende Seite der Schutzlackschicht eine Beschichtung aufweisen, deren optische Eigenschaften sich von denen der Schutzlackschicht unterscheiden, wobei die Beschichtung insbesondere von einem reflektierenden Material, vorzugsweise Metall, gebildet ist.In order to improve the visibility of the spatial structures, the spatial ones can be used in a manner known per se Structured side of the protective lacquer layer have a coating whose optical properties differ differ from those of the protective lacquer layer, the coating being in particular of a reflective one Material, preferably metal, is formed.

Obwohl die räumlichen Strukturen erfindungsgemäss im allgemeinen passerhaltig zur Klebeschicht angeordnet sind, ist es besonders günstig, wenn die Beschichtung vollflächig erfolgt, und zwar deswegen, weil sich Beschichtungen vollflächig wesentlich leichter und vor allem ohne zusätzliche Massnahmen bzw. Arbeitsschritte anbringen lassen. Trotzdem stört die vollflächige Beschichtung üblicherweise nicht, weil die Schichtstärken solcher Beschichtungen derart gering sind, dass sie beim Übertragen auf das Substrat ohne weiteres entlang des Randes der die Klebeschicht tragenden Bereiche reissen. Selbstverständlich kann bei besonders hochwertigen Folien die Beschichtung auch partiell und passerhaltig zur räumlichen Struktur angebracht werden, um so eine besonders saubere Begrenzung der übertragenen Schichten zu erreichen.Although according to the invention the spatial structures are generally arranged in register with the adhesive layer are, it is particularly advantageous if the coating is carried out over the entire surface, and this is because coatings Apply much easier over the entire surface and above all without additional measures or work steps to let. Nevertheless, the full-surface coating usually does not interfere because of the layer thickness of such coatings are so small that they are easily transferred along the edge of the adhesive layer when transferred to the substrate supporting areas tear. Of course, the coating can be used for particularly high quality films can also be partially and in register with the spatial structure, in order to create a particularly clean boundary to reach the transferred layers.

Schliesslich liegt es im Rahmen der Erfindung, dass die Ablöseschicht die Bereiche der Klebeschicht und/oder die Dekorations- oder Sicherungselemente allseits um wenigstens 0,2 mm überragt. Das Überstehen der Schutzlackschicht und der Ablöseschicht über die Dekorations- oder Sicherungselemente und gleichzeitig über die Klebeschicht bietet den Vorteil, dass die Schutztachschicht beim Übertragungsvorgang entlang ihres Randes eng an das Substrat angelegt wird, wobei im allgemeinen auch der überstehende Bereich der Schutzlackschicht einwandfrei am Substrat haftet, weil die Klebeschicht infolge ihrer, wenn auch nur geringen Dicke trotzdem beim Übertragungsvorgang zusammengedrückt und damit nach aussen in Richtung des Randes der Schutzlackschicht gedrückt wird.Finally, it is within the scope of the invention for the release layer to cover the areas of the adhesive layer and / or the decorative or securing elements protrude on all sides by at least 0.2 mm. Surviving the protective lacquer layer and the release layer over the decorative or securing elements and at the same time over the adhesive layer offers the advantage that the protective roof layer closely follows the edge during the transfer process Substrate is applied, with the protruding area of the protective lacquer layer generally also working perfectly on Substrate adheres because the adhesive layer, due to its thickness, even if it is only small, nevertheless during the transfer process pressed together and thus pressed outwards in the direction of the edge of the protective lacquer layer.

Weitere Merkmale, Einzelheiten und Vorteile der Erfindung ergeben sich aus der folgenden Beschreibung eines Ausführungsbeispiels einer Heissprägefolie gemäss der Erfindung anhand der Zeichnung.Further features, details and advantages of the invention will become apparent from the following description of a Embodiment of a hot stamping foil according to the invention with reference to the drawing.

Diese zeigt im Schnitt einen Ausschnitt aus einer entsprechenden Heissprägefolie. Es sei in diesem Zusammenhang darauf hingewiesen, dass die Stärke der verschiedenen Schichten nicht massstabsgetreu dargestellt ist.This shows a section of a corresponding hot stamping foil. It is in this regard, it should be noted that the thickness of the various layers is not to scale is shown.

Die Heissprägefolie gemäss dem Ausführungsbeispiel umfasst einen Trägerfilm 1, beispielsweise einen Polyesterfilm einer Stärke von ca. 20 µm. Auf eine Fläche dieses frägerfilms 1 ist bereichsweise eine Ablöseschicht 2 in einer Schichtstärke von ca. 0,01 bis 0,1 µm aufgebracht. Anschliessend an die Ablöseschicht 2 folgt dann, vollflächig eine transparente Schutzlackschicht 3. Die Schutzlackschicht 3 hat eine Schichtstärke von 0 8 bis 2,5 µm, vorzugsweise von 1,2 bis 1,7 µm.The hot stamping foil according to the exemplary embodiment comprises a carrier film 1, for example a polyester film with a thickness of approx. 20 µm. On a surface of this fräger film 1 is in some areas a release layer 2 is applied in a layer thickness of approximately 0.01 to 0.1 μm. Subsequent to the release layer 2 then follows, over the entire surface a transparent protective lacquer layer 3. The protective lacquer layer 3 has a layer thickness of 0 8 to 2.5 microns, preferably from 1.2 to 1.7 microns.

Die transparente Schutzlackschicht ist bei dem gezeigten Ausführungsbeispiel zur Bildung von Sicherungselementen, möglicherweise aber auch nur zur Bildung von Dekorationselementen in den zur Übertragung auf das Substrat bestimmten Bereichen mit einer beugungsoptisch wirksamen, räumlichen Struktur 4 versehen, wcbei die räumlichen Strukturen 4 durch entsprechende Replikation bzw. Prägung mittels eines entsprechenden Masters an der dem Trägerfilm 1 abgekehrten Oberfläche 5 der Schutzlackschicht ausgebildet sind.In the exemplary embodiment shown, the transparent protective lacquer layer is used to form securing elements, but possibly only to form decorative elements in the for transfer to the substrate certain areas with a diffraction-optically effective spatial structure 4, where the spatial structures 4 by corresponding replication or embossing by means of a corresponding master on the surface 5 of the protective lacquer layer facing away from the carrier film 1.

Um die räumlichen Strukturen 4 besonders deutlich sichtbar zu machen, wird nach dem Aufbringungen der Schutzlackschicht 3 und der entsprechenden Einbringung der räumlichen Strukturen 4 die gesamte, freie Oberfläche der teilweise fertiggestellten Prägefolie mit einer Beschichtung 6 versehen, wobei vorzugsweise ein geeignetes, reflektierendes Metall im Vakuum aufgedampft wird. Die Stärke der Beschichtung 6 hängt davon ab, welches Material hierfür verwendet wird. Wenn es sich um Metall handelt, liegt sie in der Grössenordnung von wenigen nm, nämlich 5 - 50 nm (50 - 500 Å), vorzugsweise 10 - 20 nm (100 - 200 Å). Die Beschichtung 6 kann aber auch beispielsweise von einem Dielektrikum gebildet sein, welches gegenüber dem Material der Schutzlackschicht 3 unterschiedliche optische Eigenschaften besitzt. Abhängig von der Art des Materials kann dann die Schichtstärke der Beschichtung 6 durchaus wesentlich grösser sein.In order to make the spatial structures 4 particularly clearly visible, the Protective lacquer layer 3 and the corresponding introduction of the spatial structures 4 the entire free surface of the partially finished stamping film is provided with a coating 6, preferably a suitable, reflective one Metal is evaporated in a vacuum. The thickness of the coating 6 depends on the material used for this is used. If it is metal, it is on the order of a few nm, namely 5 - 50 nm (50-500 Å), preferably 10-20 nm (100-200 Å). The coating 6 can also, for example, from one Dielectric be formed which 3 different optical properties compared to the material of the protective lacquer layer has. Depending on the type of material, the layer thickness of the coating 6 may well be be much larger.

Die oberste Schicht (in der Zeichnung) der Heissprägefolie des Ausführungsbeispiels bildet eine nur bereichsweise aufgebrachte Klebeschicht 7, wobei die Klebeschicht 7 im wesentlichen nur in den Bereichen vorgesehen ist, in denen Dekorations- oder Sicherungselemente, also bei dem gezeigten Ausführungsbeispiel die räumlichen Strukturen 4, vorhanden sind.The top layer (in the drawing) of the hot stamping foil of the exemplary embodiment only forms one regionally applied adhesive layer 7, the adhesive layer 7 being provided essentially only in the regions is in which decorative or securing elements, so in the embodiment shown, the spatial Structures 4, are present.

Die Klebeschicht 7 wird üblicherweise in einer Schichtstärke von 3,0 bis 10,0 µm, vorzugsweise von 4,0 bis 6,0 µm, aufgebracht.The adhesive layer 7 is usually in a layer thickness of 3.0 to 10.0 microns, preferably 4.0 to 6.0 µm.

Die Ablöseschicht 2 ist nur bereichsweise angebracht, und zwar in den Bereichen, in denen die räumliche Struktur 4 zur Bildung der Dekorations- bzw. Sicherungselemente an der Schutzlackschicht 3 und die Klebeschicht 7 vorgesehen sind. Dabei zeigt die Figur, dass die Ablöseschicht 2 die räumliche Struktur 4 bzw. die Klebeschicht 7 um ein Mass a, das wenigstens 0,2 mm betragen sollte, allseits überragt. The release layer 2 is only applied in some areas, specifically in the Areas in which the spatial structure 4 to form the decorative or securing elements on the protective lacquer layer 3 and the adhesive layer 7 are provided. The figure shows that the release layer 2 the spatial Structure 4 or the adhesive layer 7 by a dimension a, which should be at least 0.2 mm, on all sides.

Die Herstellung der Heissprägefolien gemäss dem Ausführungsbeispiel erfolgt in an sich von der Herstellung von Heissprägefolien bekannter Weise derart, dass auf den Trägerfilm 1 die Ablöseschicht 2 und die Schutzlackschicht 3 in einem Druckverfahren in entsprechender Schichtstärke bzw. Verteilung aufgebracht werden. Die Schutzlackschicht 3 ist entweder thermoplastisch oder besteht aus einem Lack, der erst unter Einfluss bestimmter Strahlung oder nach einer gewissen Zeit nach Vernetzung vollständig aushärtet. In eine thermoplastische Schutzlackschicht 3 wird die räumliche Struktur 4 unter Wärmeeinwirkung mittels an sich bekannter Matritzen eingeprägt. Sofern die Schutzlackschicht 3 eine unter Einwirkung bestimmter Strahlung, z.B. von UV-Strahlung, oder erst nach gewisser Zeit aushärtende Lackschicht ist, bringt man die räumliche Struktur 4 in einem Replikationsprozess in die Oberfläche 5 der Schutzlackschicht 3 ein, solange der die Schicht 3 bildende Lack noch nicht völlig ausgehärtet ist.The hot stamping foils according to the exemplary embodiment are produced per se from the manufacture of hot stamping foils in a known manner such that the release layer 2 and the protective lacquer layer on the carrier film 1 3 are applied in a printing process with the appropriate layer thickness or distribution. The protective lacquer layer 3 is either thermoplastic or consists of a lacquer that only under the influence of certain radiation or after fully cures after a certain time after networking. In a thermoplastic protective lacquer layer 3 spatial structure 4 embossed under the influence of heat by means of matrices known per se. If the protective lacquer layer 3 a under the influence of certain radiation, e.g. of UV radiation, or hardening after a certain time Is lacquer layer, one brings the spatial structure 4 in a replication process in the surface 5 of the Protective lacquer layer 3 as long as the lacquer forming layer 3 has not yet fully hardened.

Die so teilweise fertiggestellte Folie wird dann mit der Beschichtung 6 versehen, beispielsweise Aluminium in entsprechender Dicke im Vakuum aufgedampft. Die Beschichtung 6 kann dabei sowohl vollflächig als auch partiell und passerhaltig zur räumlichen Struktur 4 ausgebildet werden. Hieran anschliessend wird dann, wiederum in einem Druckverfahren, bereichsweise die Klebeschicht 7 aufgebracht, wobei die Passerung der Klebeschicht 7 gegenüber der Ablöseschicht 2 oder der räumlichen Struktur 4 durch entsprechende Abtastung der bereits auf dem Trägerfilm 1 vorhandenen Lagen erfolgt. Zu diesem Zweck kann die Ablöseschicht 2, welche bereichsweise vorhanden ist, mit einem geeigneten Mariderungspigment versetzt werden.The film thus partially completed is then provided with the coating 6, for example aluminum in appropriate thickness evaporated in vacuo. The coating 6 can be both full and partial and be formed in register with the spatial structure 4. This is then followed, again in a printing process, areas of the adhesive layer 7 applied, the registration of the adhesive layer 7 with respect to the release layer 2 or the spatial structure 4 by appropriate scanning of the already on the Carrier film 1 existing layers takes place. For this purpose, the release layer 2, which is present in some areas is mixed with a suitable maritime pigment.

Die einzelnen Schichten können wie folgt zusammengesetzt sein: Ablöseschicht, Wasser deionisiert 740 g Polyvinylalkohol (Hydrolysegrad: 98.4 ± 0.4 mol%) 8 g Ethanol 250 g Markierungspigment (z.B. Benzoxazolderivat) - um eine Passerung zu ermöglichen - 2 g Schutzlackschicht, vollflächig MEK 400 g Toluol 150 g Cyclohexanon 200 g Cellulosenitrat (niedrigviskos, 65 % in Alk.) 148 g Butyl-/Methylmethacrylat (d=1,05 g/cm3, Säurezahl 7-9 mg KoH/g) 102 g The individual layers can be composed as follows: Release layer, Deionized water 740 g Polyvinyl alcohol (degree of hydrolysis: 98.4 ± 0.4 mol%) 8 g ethanol 250 g Marking pigment (e.g. benzoxazole derivative) - to enable registration - 2 g Protective lacquer layer, all over MEK 400 g toluene 150 g cyclohexanone 200 g Cellulose nitrate (low viscosity, 65% in alk.) 148 g Butyl / methyl methacrylate (d = 1.05 g / cm 3 , acid number 7-9 mg KoH / g) 102 g

Klebeschicht, bereichsweise Rezeptur 1 MEK 100 g Xylol 200 g Cyclohexanon 255 g Polyvinylchlorid Terpolymer (Tg = 90 °C) 290 g SiO2 50 g Polyisocyanat (50% Ethylacetat, NCO-Gehalt 8%) 105 g Rezeptur 2 MEK 250 g Toluol 340 g Vinylchlorid-/Vinylacetat-Copolymer (Fp: 80 °C) 215 g Thermoplastisches Polyurethan (d = 1,18 g/cm3) 135 g Kieselsäure, hydrophobiert (Partikelgrösse ca. 10 µm) 60 g Adhesive layer, in some areas Recipe 1 MEK 100 g xylene 200 g cyclohexanone 255 g Polyvinyl chloride terpolymer (Tg = 90 ° C) 290 g SiO 2 50 g Polyisocyanate (50% ethyl acetate, NCO content 8%) 105 g Recipe 2 MEK 250 g toluene 340 g Vinyl chloride / vinyl acetate copolymer (mp: 80 ° C) 215 g Thermoplastic polyurethane (d = 1.18 g / cm 3 ) 135 g Silicic acid, hydrophobic (particle size approx. 10 µm) 60 g

Bei der Verarbeitung werden die Prägefolien gemäss der Erfindung mit der bereichsweise aufgebrachten Klebeschicht voraus gegen ein Substrat gepresst, wobei der Andruck beispielsweise mittels eines vollfächigen Stahlrades, aber auch mit einem geeigneten Segmentrad erfolgen kann. Unter entsprechend hohem Druck und bei geeigneter Temperatur löst sich dann, unterstützt durch die Ablöseschicht 2, die insgesamt mit 8 bezeichnete Übertragungslage, die zumindest aus einer Schutzlackschicht 3, der Beschichtung 6 sowie der Klebeschicht 7 besteht, von dem Trägerfilm 1. und zwar im wesentlichen nur in den Bereichen, in denen eine Klebeschicht 7 vorgesehen ist. Sollte infolge zu grosser Stabilität der Schutzlackschicht 3 diese im Bereich der Ränder der Klebeschicht 7 nicht konturenscharf durchtrennt werden oder abreissen, kann durch entsprechende mechanische Einwirkung auf das auf das Substrat übertragene Element ohne grosse Probleme die überflüssige Schutzlackschicht entfernt werden, weil diese ja - da keine Klebeschicht 7 in den unerwünschten Bereichen vorhanden ist - nicht am Substrat haftet. Normalerweise ist jedoch ein derartiger zusätzlicher Arbeitsgang nicht erforderlich.During processing, the stamping foils according to the invention are applied with the adhesive layer applied in regions pressed against a substrate in advance, the pressure being applied, for example, by means of a full-surface steel wheel, but can also be done with a suitable segment wheel. Under correspondingly high pressure and at a suitable one Temperature then dissolves, supported by the release layer 2, the overall transfer position designated 8, which consists at least of a protective lacquer layer 3, the coating 6 and the adhesive layer 7, of the carrier film 1. and essentially only in the areas in which an adhesive layer 7 is provided. Should be too big as a result Stability of the protective lacquer layer 3 does not cut through this in the region of the edges of the adhesive layer 7 with sharp contours can be or tear off, by appropriate mechanical action on the transferred to the substrate Element the superfluous protective lacquer layer can be removed without major problems, because this - yes, there is no adhesive layer 7 is present in the unwanted areas - does not adhere to the substrate. However, this is usually the case additional work step not required.

Sofern die Prägefolien gemäss der Erfindung nicht als Heissprägefolien ausgebildet sondern zur Kaltverarbeitung bestimmt sind, d.h. die Klebeschicht auch bei Raumtemperatur bereits klebrig ist, besteht die Möglichkeit, den Trägerfilm 1 auf der der Übertragungslage 8 abgekehrten Seite mit einer entsprechenden Beschichtung zu versehen, die ein Anhaften der Nebeschicht 7 am Trägerfilm 1 beim Aufwickeln der Folien verhindert.If the stamping foils according to the invention are not designed as hot stamping foils but for cold processing are determined, i.e. the adhesive layer is already sticky even at room temperature, there is the possibility of the carrier film 1 on the side facing away from the transfer layer 8 to be provided with a corresponding coating which adhesion of the secondary layer 7 to the carrier film 1 is prevented when the films are wound up.

Claims (7)

  1. Stamping foil, in particular hot-stamping foil, composed of a supporting film (1) and, capable of being released therefrom, a transfer layer (8) which - starting from the supporting film (1) - has at least one transparent protective layer (3), a decorative layer structure formed from at least one layer and encompassing decorative or security elements (4), and also an adhesive layer (7) for laying down the transfer layer on a substrate, where a release layer (2) has been provided between supporting film (1) and transfer layer (8) only in some areas, and in registration with the adhesive layer (7), and the said adhesive layer (7) has been provided only in some areas and in registration with the decorative or security elements (4) of the transfer layer (8), which have been developed only in some areas, while the protective layer (3) covers the full surface of the supporting film (1) .
  2. Stamping foil according to Claim 1,
    characterized in that
    the release layer (2) extends beyond the areas of the adhesive layer (7) and/or beyond the decorative or security elements (4) on all sides by at least 0.2 mm.
  3. Stamping foil according to Claim 1 or 2,
    characterized in that
    the protective layer has been formed from a coating material which has good adhesion to the supporting film (1) outside the areas covered by the release layer (2).
  4. Stamping foil according to one of the preceding claims,
    characterized in that
    the decorative or security elements have been formed from optically diffracting three-dimensional structures (4) which have been arranged in registration with the adhesive layer (7) and which have been developed in the protective layer (3) on its side (5) facing away from the supporting film (1).
  5. Stamping foil according to Claim 4,
    characterized in that
    the protective layer (3) has, on its side (5) which has the three-dimensional structures (4), a coating (6) whose optical properties are different from those of the protective layer (3).
  6. Stamping foil according to Claim 5, characterized in that the coating (6) has been formed from a reflecting material, preferably metal.
  7. Stamping foil according to either of Claims 5 or 6, characterized in that the coating (6) has been provided over the full surface.
EP95921699A 1994-07-02 1995-06-10 Blocking foil, in particular hot-blocking foil with decorative or warranty elements Expired - Lifetime EP0768957B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4423291 1994-07-02
DE4423291A DE4423291A1 (en) 1994-07-02 1994-07-02 Embossing foil, in particular hot stamping foil with decoration or security elements
PCT/DE1995/000784 WO1996001187A1 (en) 1994-07-02 1995-06-10 Blocking foil, in particular hot-blocking foil with decorative or warranty elements

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EP0768957A1 EP0768957A1 (en) 1997-04-23
EP0768957B1 EP0768957B1 (en) 1999-04-07
EP0768957B2 true EP0768957B2 (en) 2003-11-19

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EP (1) EP0768957B2 (en)
JP (1) JP3701313B2 (en)
CN (1) CN1101757C (en)
AT (1) ATE178537T1 (en)
AU (1) AU694236B2 (en)
BR (1) BR9508211A (en)
DE (2) DE4423291A1 (en)
ES (1) ES2130620T5 (en)
RU (1) RU2142882C1 (en)
TW (1) TW327363U (en)
WO (1) WO1996001187A1 (en)

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TW327363U (en) 1998-02-21
EP0768957B1 (en) 1999-04-07
ATE178537T1 (en) 1999-04-15
JPH10508260A (en) 1998-08-18
DE4423291A1 (en) 1996-01-11
EP0768957A1 (en) 1997-04-23
JP3701313B2 (en) 2005-09-28
RU2142882C1 (en) 1999-12-20
AU694236B2 (en) 1998-07-16
US5731064A (en) 1998-03-24
CN1151716A (en) 1997-06-11
ES2130620T5 (en) 2004-07-01
CN1101757C (en) 2003-02-19
BR9508211A (en) 1997-12-23
ES2130620T3 (en) 1999-07-01
AU2668395A (en) 1996-01-25
DE59505599D1 (en) 1999-05-12
WO1996001187A1 (en) 1996-01-18

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