EP1509404B1 - Multilayer body with a layer having at least one laser-sensitive material - Google Patents

Multilayer body with a layer having at least one laser-sensitive material Download PDF

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Publication number
EP1509404B1
EP1509404B1 EP02742735A EP02742735A EP1509404B1 EP 1509404 B1 EP1509404 B1 EP 1509404B1 EP 02742735 A EP02742735 A EP 02742735A EP 02742735 A EP02742735 A EP 02742735A EP 1509404 B1 EP1509404 B1 EP 1509404B1
Authority
EP
European Patent Office
Prior art keywords
laser
layer
multilayer body
sensitive
body according
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
EP02742735A
Other languages
German (de)
French (fr)
Other versions
EP1509404A1 (en
Inventor
Norbert Lutz
Gerhard Zinner
Matthias Schumacher
Ulrich Knaack
Dirk Fischer
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.)
Unica Technology AG
Leonhard Kurz Stiftung and Co KG
Original Assignee
Orga Systems GmbH
Leonhard Kurz GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Orga Systems GmbH, Leonhard Kurz GmbH and Co KG filed Critical Orga Systems GmbH
Publication of EP1509404A1 publication Critical patent/EP1509404A1/en
Application granted granted Critical
Publication of EP1509404B1 publication Critical patent/EP1509404B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B42D25/405—Marking
    • B42D25/43—Marking by removal of material
    • B42D25/435—Marking by removal of material using electromagnetic radiation, e.g. laser
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/14—Security printing
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
    • B42D25/29—Securities; Bank notes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/333—Watermarks
    • 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
    • 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
    • Y10T428/14—Layer or component removable to expose adhesive
    • Y10T428/1467—Coloring agent
    • 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
    • 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
    • Y10T428/253—Cellulosic [e.g., wood, paper, cork, rayon, 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
    • Y10T428/25—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
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y10T428/256—Heavy metal or aluminum or compound thereof

Definitions

  • the invention relates to a multilayer body consisting of a layer composite formed with a substrate with at least one layer comprising laser-sensitive material - referred to below as the laser-sensitive layer.
  • Such multilayer bodies are producible, e.g. using a transfer film, preferably hot stamping foil. It is known to apply such films on a plastic body to form an identity card or code card and make the individualization of the card via a laser treatment of the applied film. In laser treatment, laser-induced markings are produced on the laser-sensitive layer.
  • the publication EP 1 022 625 describes a transfer film that allows transfer of a hologram to a substrate.
  • the publication DE 10047450 A1 discloses a product having a security element, wherein transparent cover films and laser-sensitive ink layers are applied to, for example, an opaque core film or another security product for forming a security element in an alternating sequence.
  • the invention has for its object to provide a multi-layer body of the type mentioned, which makes a particularly accurate and diverse laser-induced marking possible.
  • the unwanted impairments occurring in the laser treatment should be reduced or eliminated in further layers or on the substrate of the multilayer body. It should also Substrates can be used on the paper material.
  • the laser-sensitive layer is associated with a background layer, which preferably reflects to a high degree or at least substantially not transparent to the laser radiation in the laser treatment of the laser-sensitive layer, ie when generating the laser-induced markers for this laser radiation or at least substantially not transparent is for the non-reflected portion of the incident laser radiation, it is achieved that in layers below the background layer no laser radiation or at least very little laser radiation is incident. Additionally or alternatively it can be provided that the background layer for the laser radiation is absorbent, so that at least a large part of the non-reflected radiation is absorbed in the background layer. The background layer thus forms a protective layer for underlying layers or the substrate.
  • the laser-sensitive layer itself already acts as a protective layer for the underlying layers and the substrate and a large part of the laser radiation acting on the laser treatment does not completely penetrate the laser-sensitive layer or does not reach the underlying layer and thus substantially destroy the laser Substrate is prevented.
  • the background layer brings significantly increased security, so that a particularly precisely limited and varied laser-marked marking is possible and also much greater freedom of design for the design of the layer composite can be obtained.
  • the background layer can also be used to obtain a color enhancement or lightening of the laser-induced marking formed in the overlying laser-sensitive layer.
  • special brightener substances can be introduced, which provide this effect.
  • the background layer under the laser-sensitive layer is arranged only in a partial area, advantageously only below the area in which the arrangement of the laser-indexed marking is provided, i. in the limited portion of the laser-sensitive layer in which the laser-induced marking is to be positioned.
  • a plurality of laser-sensitive layers arranged one above the other are provided in the layer composite.
  • a background layer is formed between the laser-sensitive layers.
  • a transfer or laminating film is applied to the substrate and in the film one or more layers are formed, wherein at least one layer is formed as the laser-sensitive layer.
  • the background layer can likewise be formed in the film, but alternatively also as a constituent of the substrate, for example as a surface layer of the substrate.
  • the multi-layer body is laminated from a plurality of overlay films and inlets. At least one of the overlay films may be formed as the laser-sensitive layer or comprise the laser-sensitive layer. It may be formed, for example, as a laminating film, the application of a hot stamping foil with the is provided laser-sensitive layer.
  • FIG. 1 it is an identity card with various markings and individualizations, as can be seen from the top view in Figure 2.
  • the card body - hereafter called card 8 - is made of paper material.
  • a multilayer film is applied on its surface, as can be seen in Figure 1, a multilayer film is applied.
  • the film has as layers a protective layer 3, a laser-sensitive material having layer 4, a background layer 5 and an adhesive layer 6, with which it is bonded to the surface of the card 8.
  • the film is arranged exclusively in a partial area of the card 8. It has a rectangular plan, as can be seen in Figure 2.
  • the film may be transferred via a transfer process, e.g. be applied by hot stamping a hot stamping foil on the card 8.
  • Such a transfer film is shown in section in FIG. 4.
  • the release layer 2 and the carrier film 1 shown above the protective layer 3 have been removed during the transfer process, which is usually carried out under elevated pressure and elevated temperature.
  • a laser-induced color image 10y is formed in the laser-sensitive layer.
  • This color image 10y can be made by laser-induced bleaching of the layer 4 laser-sensitive material. The process of laser-induced bleaching will be described later in detail.
  • the background layer 5 is formed under the entire region of the laser-sensitive layer 4. This background layer 5 is not transparent in the visible spectral range, so that the substrate 8 is covered in this area.
  • a marking 81 is formed on the surface of the substrate 8, which is recognizable exclusively in the area outside the color image 10 y or outside the background layer 5 when viewed from above (see Figure 2).
  • the marking 81 consists of a security pressure 81 d, which is formed in the embodiment in the manner of guilloches. Further, fluorescent threads 81f are disposed in the substrate and on its surface, which reflect upon exposure to UV light and appear as black threads in the visible spectral range. In addition, a watermark 81w is formed as a further identification in the substrate 8 and a security strip 81s.
  • the security strip 81s may have various identification and individualization elements, such as a diffraction and / or hologram structure, laser-induced markings, etc.
  • the security strip 81s is incorporated in the substrate 8 in the illustrated embodiment. It also passes through the substrate below the laser-induced color image 10 y and is not visible there due to the non-transparent background layer 5. The security strip 81f is visible only in the area in which it extends beyond the laser-induced image 10y.
  • the background layer 5 is formed only in the left half of the laser-induced color image 10y, so that only in this left part in which the background layer 5 is formed, the identification 81 is covered on the substrate 8 and is not visible. In the remaining area of the laser-induced image 10y, no background layer 5 is arranged, so that the surface of the substrate 8 and thus the marking 81 are visible in this area through the color-tinted transparent laser-induced color image.
  • This exemplary embodiment results in particularly increased protection against counterfeiting, since the laser-induced image 10y interacts in a particularly versatile manner with the other identification elements optically.
  • FIGS. 5 and 6 show transfer foils which have such a diffraction and / or hologram structure 5b in their layer structure.
  • the film in FIG. 5 corresponds in its construction to the film in FIG. 4, with only an additional resist layer 5c and a reflection layer 5r being additionally formed between the protective layer 3 and the laser-sensitive layer 4.
  • the diffraction and / or hologram structure 5b is formed in the region of the resist layer 5c, the reflection layer 5r and the laser-sensitive layer 4.
  • the additional lacquer layer 5c is designed as a laser-sensitive layer 4c.
  • the laser-sensitive layer 4c in addition to the laser-sensitive layer 4, there is the laser-sensitive layer 4c between which the reflection layer 5r extends.
  • the laser-sensitive layers 4 and 4c can each be formed from the same laser-sensitive material, but alternatively also from two different laser-sensitive materials.
  • the background layer 5 is formed underneath the laser-sensitive layer 4 on the side facing the substrate, which, as in connection with the exemplary embodiments illustrated in FIGS. 1 to 3, acts as a protective layer during laser treatment and as a brightener and color amplifier of the laser-induced image can act.
  • laminating films are shown, which correspond in their layer structure of the transfer sheets of Figures 5 to 6.
  • the overlay film 30 corresponds to the protective layer 3.
  • the remaining layers: the laser-sensitive layer 40, the background layer 50, the reflective layer 50r, and the adhesive layer 60 correspond to the laser-sensitive layer 4, the background layer 5, the reflective layer 5r, and the adhesive layer 6, respectively appropriate way is also at 8 and 9, a diffraction and / or hologram structure 50b corresponding to the diffraction and / or hologram structure 5b of FIGS. 5 and 6 is provided.
  • the multilayer body is formed as a body laminated from various overlay foils and inlets.
  • the overlay film 30 arranged on top has a plurality of layers on its underside which are applied by applying a transfer film to the overlay film. These layers are a lacquer layer 5c, a reflection layer 5r, a laser-sensitive layer 4, a background layer 5 and an adhesive layer 6. In the region of the lacquer layer 5c, the reflection layer 5r and the laser-sensitive layer 4 is a diffraction and / or hologram structure 5b formed.
  • this film dressing is an overlay film 32 consisting of material doped with carbon and / or carbon black.
  • This doped overlay film is a second laser-sensitive layer. In this layer takes place with appropriate laser action a carbonization, which can be obtained with appropriate adjustment of the laser conditions, a grayscale marker.
  • overlay film 32 inlets 90 are arranged, which may consist of paper material in the illustrated embodiment.
  • an overlay film 30 and thereon another overlay film 30 are arranged on the lower side of the lower inlet.
  • the laser irradiation is preferably carried out when applied to the substrate film or coating.
  • the laser irradiation can also be carried out before application, ie, directly by irradiation of the film alone.
  • Full-color image formation ie, the generation of a laser-induced mark as a full-color image, may be performed in embodiments in which the laser-sensitive material is formed from a mixture of a cyan pigment component, a magenta pigment component, and a yellow pigment component.
  • the formulation of the layers is given a hot stamping foil at the end of the description.
  • a blue or green or red color mark is produced in which this spot is irradiated with a certain laser wavelength, with which a certain pigment component is bleached.
  • this point is laser-treated in a second step, with a laser wavelength with which one of the not yet bleached at this point pigment components is bleached. If a blue color mark has been generated in the first step, the cyan pigment component is at this point and the magenta pigment component unbleached. To make the color cyan at this point, the magenta pigment component must be bleached in this second step. This is done with green laser light. This results in a cyan mark at this point.
  • magenta mark is to be obtained instead of this cyan mark
  • the blue mark produced in the first step must be treated with red laser light.
  • the cyan pigment is bleached at this point, so that the magenta pigment remains unbleached at this point. This results in the magenta marking at this point.
  • a green color marking produced in the first step which is formed from unbleached cyan pigment and yellow pigment remaining there, can produce a cyan-colored marking or a yellow-colored marking by treatment with blue laser light or red laser light.
  • a red color marking produced in the first step can be converted into a yellow or magenta marking in the second step by laser treatment in the second step with green laser light or blue laser light.
  • this point In order to obtain a transparent spot at the point treated in the first and second step, ie to obtain a white spot when the background layer 5 is white, in a third step this point must be treated with a laser beam whose wavelength is adjusted so that at this point after the second step unbleached pigment component is bleached, ie the yellow color marking must be bleached with blue laser light, the magenta green light mark and the cyan mark with red laser light.
  • Laser treatment can also be used to produce color markers or a full-color image in the colorant or the colorants in the laser-sensitive layer by color change.
  • the laser treatment can be carried out in a corresponding manner with successive process steps.
  • a colorant i. Coloring substances are pigments in question. These are usually insoluble and are usually inorganic substances.
  • the color change takes place in each case under specific laser conditions, which are then used in the laser treatment in the individual steps.
  • the bleaching and color conversion process described can also be used if the laser-sensitive material consists of only one or two colorant components. Also, other colorant components and other laser wavelength ranges can be used in the laser treatment.
  • the laser treatment of the transfer film to produce the color markings may also take place before the application of the film, and in particular, if the protective layer 3 is formed as a layer which is not or only partially transparent to laser radiation or a layer which is not transparent for laser radiation in the specific wavelength range or if an additional UV-absorbing protective layer is provided.
  • the laser treatment is then carried out before the application of the film in which the laser beam is directed to the back of the film, ie on the background layer 5 or the adhesive layer 6 and thus the laser-sensitive layer 4 is thus treated from the other side to therein To produce color markings in the same way.
  • the background layer 5 and the adhesive layer 6 are transparent or at least partially transparent or applied only in partial areas in these applications for the laser radiation in question.
  • the layers 2 to 6 can be produced according to the following recipes:
  • methyl ethyl ketone 61.0 parts Diaketonalkohol 9.0 parts Methyl methacrylate (Tg 122 ° C) 18.0 parts Polyethylene dispersion (23% in xylene) (softening point 140 ° C) 7.5 parts High molecular weight dispersing additive (40%, amine number 20) 0.5 parts Extender (aluminum silicate) 4.0 parts
  • Laser-sensitive layer 4 (first color coat layer):
  • Adhesive layer 6 is Adhesive layer 6

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  • General Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
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Abstract

The present invention relates to a multi-layer body which is a paper document with a hot stamping film embossed thereon. The hot stamping film has a laser-sensitive layer in which a laser-induced color image is produced by laser treatment. Arranged on the document are further security identifications such as a security print, which is in the form of guilloche patterns, fluorescent threads, and a security strip. Water marks are also provided in the paper document.

Description

Die Erfindung betrifft einen Mehrschichtenkörper bestehend aus einem miteinem Substrat gebildeten Schichtenverbund mit mindestens einer lasersensitives Material aufweisenden Schicht - im folgenden lasersensitive Schicht genannt.The invention relates to a multilayer body consisting of a layer composite formed with a substrate with at least one layer comprising laser-sensitive material - referred to below as the laser-sensitive layer.

Derartige Mehrschichtenkörper sind herstellbar z.B. unter Einsatz einer Transferfolie, vorzugsweise Heißprägefolie. Es ist bekannt, derartige Folien auf einem Kunststoffkörper zur Ausbildung einer Identitätskarte oder Codekarte aufzubringen und über eine Laserbehandlung der aufgebrachten Folie die Individualisierung der Karte vorzunehmen. Bei der Laserbehandlung werden der lasersensitiven Schicht laserinduzierte Markierungen erzeugt.Such multilayer bodies are producible, e.g. using a transfer film, preferably hot stamping foil. It is known to apply such films on a plastic body to form an identity card or code card and make the individualization of the card via a laser treatment of the applied film. In laser treatment, laser-induced markings are produced on the laser-sensitive layer.

Die Druckschrift EP 1 022 625 beschreibt einen Transferfilm, der den Übertrag eines Hologramms auf ein Substrat ermöglicht.The publication EP 1 022 625 describes a transfer film that allows transfer of a hologram to a substrate.

Die Druckschrift DE 10047450 A1 offenbart ein Erzeugnis mit einem Sicherheitselement, wobei auf z.B. einer opaken Kernfolie odereinem anderen Sicherheitserzeugnis zur Bildüng eines Sicherheitselements in abwechselnder Reihenfolge transparente Deckfolien und lasersensitive Farbschichten aufgebracht sind.The publication DE 10047450 A1 discloses a product having a security element, wherein transparent cover films and laser-sensitive ink layers are applied to, for example, an opaque core film or another security product for forming a security element in an alternating sequence.

Der Erfindung liegt die Aufgabe zugrunde, einen Mehrschichtenkörper der eingangs genannten Art zu schaffen, der eine besonders exakte und vielfältige laserinduzierte Markierung möglich macht. Insbesondere sollen die bei der Laserbehandlung auftretenden unerwünschten Beeinträchtigungen in weiteren Schichten oder auf dem Substrat des Mehrschichtenkörpers reduziert oder eliminiert werden. Es sollen auch Substrate am Papiermaterial eingesetzt werden können.The invention has for its object to provide a multi-layer body of the type mentioned, which makes a particularly accurate and diverse laser-induced marking possible. In particular, the unwanted impairments occurring in the laser treatment should be reduced or eliminated in further layers or on the substrate of the multilayer body. It should also Substrates can be used on the paper material.

Die Erfindung löst diese Aufgabe mit dem Gegenstand des Anspruchs 1.The invention solves this problem with the subject matter of claim 1.

Dadurch, dass der lasersensitiven Schicht eine Hintergrundschicht zugeordnet ist, die die bei der Laserbehandlung der lasersensitiven Schicht, d.h. bei der Erzeugung der laserinduzierten Markierungen auftreffende Laserstrahlung vorzugsweise zu einem hohen Grad reflektiert oder zumindest weitgehend nicht transparent ist für diese Laserstrahlung bzw. zumindest weitgehend nicht transparent ist für den nicht reflektierten Anteil der einfallenden Laserstrahlung, wird erreicht, dass in Schichten unterhalb der Hintergrundschicht keine Laserstrahlung oder zumindest sehr wenig Laserstrahlung einfällt. Zusätzlich oder alternativ kann vorgesehen sein, dass die Hintergrundschicht für die Laserstrahlung absorbierend ist, so dass zumindest ein großer Teil der nicht reflektierten Strahlung in der Hintergrundschicht absorbiert wird. Die Hintergrundschicht bildet so eine Schutzschicht für darunter liegende Schichten bzw. das Substrat. Dies bedeutet, dass auch sehr laserempfindliche Substrate, z.B. also auch Substrate aus Papiermaterial ohne weiteres eingesetzt werden können. Man hat zwar festgestellt, dass die lasersensitive Schicht selbst bereits für die darunter liegenden Schichten und das Substrat als Schutzschicht wirkt und ein Großteil der bei der Laserbehandlung einwirkenden Laserstrahlung die lasersensitive Schicht nicht vollständig durchdringt oder die darunter liegende Schicht nicht erreicht und somit eine wesentliche Zerstörung des Substrats verhindert wird. Die Hintergrundschicht bringt jedoch wesentlich erhöhte Sicherheit, so dass eine besonders exakt begrenzte und vielfältige laserindizierte Markierung möglich wird und außerdem wesentlich größere Gestaltungsfreiheiten für die Ausgestaltung des Schichtenverbundes erhalten werden.Characterized in that the laser-sensitive layer is associated with a background layer, which preferably reflects to a high degree or at least substantially not transparent to the laser radiation in the laser treatment of the laser-sensitive layer, ie when generating the laser-induced markers for this laser radiation or at least substantially not transparent is for the non-reflected portion of the incident laser radiation, it is achieved that in layers below the background layer no laser radiation or at least very little laser radiation is incident. Additionally or alternatively it can be provided that the background layer for the laser radiation is absorbent, so that at least a large part of the non-reflected radiation is absorbed in the background layer. The background layer thus forms a protective layer for underlying layers or the substrate. This means that even very laser-sensitive substrates, ie also substrates made of paper material can be used without further ado. It has indeed been found that the laser-sensitive layer itself already acts as a protective layer for the underlying layers and the substrate and a large part of the laser radiation acting on the laser treatment does not completely penetrate the laser-sensitive layer or does not reach the underlying layer and thus substantially destroy the laser Substrate is prevented. However, the background layer brings significantly increased security, so that a particularly precisely limited and varied laser-marked marking is possible and also much greater freedom of design for the design of the layer composite can be obtained.

Alternativ oder zusätzlich kann die Hintergrundschicht auch eingesetzt werden, um eine Farbverstärkung oder Aufhellung der in der darüber liegenden lasersensitiven Schicht ausgebildeten laserinduzierten Markierung zu erhalten. In der Hintergrundschicht können auch spezielle Aufhellersubstanzen eingebracht werden, die diesen Effekt erbringen.Alternatively or additionally, the background layer can also be used to obtain a color enhancement or lightening of the laser-induced marking formed in the overlying laser-sensitive layer. In the background layer and special brightener substances can be introduced, which provide this effect.

Vorzugsweise wird die Hintergrundschicht unter der lasersensitiven Schicht nur in einem Teilbereich angeordnet und zwar vorteilhafterweise lediglich unterhalb von dem Bereich, in dem die Anordnung der laserindizierten Markierung vorgesehen ist, d.h. in dem begrenzten Teilbereich der lasersensitiven Schicht, in dem die laserinduzierte Markierung positioniert werden soll.Preferably, the background layer under the laser-sensitive layer is arranged only in a partial area, advantageously only below the area in which the arrangement of the laser-indexed marking is provided, i. in the limited portion of the laser-sensitive layer in which the laser-induced marking is to be positioned.

Bei besonders vorteilhaften Ausführungsformen sind mehrere übereinander angeordnete lasersensitive Schichten im Schichtenverbund vorgesehen. In diesen Fällen ist es von Vorteil, wenn insbesondere zwischen den lasersensitiven Schichten eine Hintergrundschicht ausgebildet ist.In particularly advantageous embodiments, a plurality of laser-sensitive layers arranged one above the other are provided in the layer composite. In these cases, it is advantageous if in particular a background layer is formed between the laser-sensitive layers.

Bei bevorzugten Ausführungen ist vorgesehen, dass eine Transfer- oder Laminierfolie auf das Substrat aufgebracht wird und in der Folie eine oder mehrere Schichten ausgebildet sind, wobei mindestens eine Schicht als die lasersensitive Schicht ausgebildet ist. Die Hintergrundschicht kann ebenfalls in der Folie ausgebildet sein, alternativ aber auch als Bestandteil des Substrats z.B. als Oberflächenschicht des Substrats. Bei anderen Ausführungsformen ist vorgesehen, dass der Mehrschichtenkörper aus mehreren Overlay-Folien und Inlets laminiert wird. Mindestens eine der Overlay-Folien kann als die lasersensitive Schicht ausgebildet sein oder die lasersensitive Schicht aufweisen. Sie kann z.B. als Laminierfolie ausgebildet sein, die über Aufbringung einer Heißprägefolie mit der lasersensitiven Schicht versehen ist.In preferred embodiments, it is provided that a transfer or laminating film is applied to the substrate and in the film one or more layers are formed, wherein at least one layer is formed as the laser-sensitive layer. The background layer can likewise be formed in the film, but alternatively also as a constituent of the substrate, for example as a surface layer of the substrate. In other embodiments, it is provided that the multi-layer body is laminated from a plurality of overlay films and inlets. At least one of the overlay films may be formed as the laser-sensitive layer or comprise the laser-sensitive layer. It may be formed, for example, as a laminating film, the application of a hot stamping foil with the is provided laser-sensitive layer.

Im nachfolgenden werden bevorzugte Ausführungsbeispiele unter Bezugnahme auf die beigefügten Figuren näher erläutert.In the following preferred embodiments are explained in more detail with reference to the accompanying figures.

Dabei zeigen:

Figur 1
eine Schnittansicht eines Ausführungsbeispiels eines Mehrschichtenkörpers bestehend aus einem Papiermaterialsubstrat, auf dem bereichsweise eine mehrschichtige Folie aufgebracht ist;
Figur 2
eine Draufsicht auf das Ausführungsbeispiel in Figur 1;
Figur 3
eine Draufsicht entsprechend Figur 2 von einem abgewandelten Ausführungsbeispiel;
Figuren 4 bis 6
Schnittdarstellungen von Ausführungsbeispielen von Transferfolien mit lasersensitiver Schicht und zugeordneter Hintergrundschicht;
Figuren 7 bis 9
Schnittdarstellungen von Ausführungsbeispielen von Laminierfolien mit lasersensitiver Schicht und zugeordneter Hintergrundschicht;
Figur 10
Explosionsdarstellung einer aus diversen Overlay-Folien und Inlets laminierten Kartenkörpers.
Showing:
FIG. 1
a sectional view of an embodiment of a multi-layer body consisting of a paper material substrate on which a multi-layered film is partially applied;
FIG. 2
a plan view of the embodiment in Figure 1;
FIG. 3
a plan view corresponding to Figure 2 of a modified embodiment;
FIGS. 4 to 6
Sectional views of embodiments of transfer films with laser-sensitive layer and associated background layer;
FIGS. 7 to 9
Sectional views of embodiments of laminating with laser-sensitive layer and associated background layer;
FIG. 10
Exploded view of a card body laminated from various overlay foils and inlets.

Bei den in den Figuren 1 und 2 dargestellten Ausführungsbeispiel, handelt es sich um eine Ausweiskarte mit diversen Kennzeichnungen und Individualisierungen, wie aus der Draufsicht in Figur 2 zu erkennen ist. Der Kartenkörper - im folgenden Karte 8 genannt - besteht aus Papiermaterial. Auf seiner Oberfläche ist, wie in Figur 1 zu erkennen ist, eine mehrschichtige Folie aufgebracht. Die Folie weist als Schichten eine Schutzschicht 3, eine lasersensitives Material aufweisende Schicht 4, eine Hintergrundschicht 5 und eine Kleberschicht 6 auf, mit der sie mit der Oberfläche der Karte 8 verklebt ist. Die Folie ist ausschließlich in einem Teilbereich der Karte 8 angeordnet. Sie weist rechteckigen Grundriss auf, wie in Figur 2 zu erkennen ist. Die Folie kann über einen Transferprozess, z.B. durch Heißprägen einer Heißprägefolie auf die Karte 8 aufgebracht worden sein. Eine solche Transferfolie ist in Figur 4 im Schnitt dargestellt. Die über der Schutzschicht 3 dargestellte Ablöseschicht 2 und der Trägerfilm 1 sind beim Transfervorgang, der üblicherweise unter erhöhtem Druck und erhöhter Temperatur erfolgt, abgelöst worden.In the embodiment shown in Figures 1 and 2, it is an identity card with various markings and individualizations, as can be seen from the top view in Figure 2. The card body - hereafter called card 8 - is made of paper material. On its surface, as can be seen in Figure 1, a multilayer film is applied. The film has as layers a protective layer 3, a laser-sensitive material having layer 4, a background layer 5 and an adhesive layer 6, with which it is bonded to the surface of the card 8. The film is arranged exclusively in a partial area of the card 8. It has a rectangular plan, as can be seen in Figure 2. The film may be transferred via a transfer process, e.g. be applied by hot stamping a hot stamping foil on the card 8. Such a transfer film is shown in section in FIG. 4. The release layer 2 and the carrier film 1 shown above the protective layer 3 have been removed during the transfer process, which is usually carried out under elevated pressure and elevated temperature.

Wie in Figur 2 zu erkennen ist, ist in der lasersensitiven Schicht ein laserinduziertes Farbbild 10y ausgebildet. Dieses Farbbild 10y kann durch laserinduziertes Bleichen des lasersensitiven Materials der Schicht 4 hergestellt werden. Das Verfahren des laserinduzierten Bleichens wird weiter hinten noch im Einzelnen beschrieben. Unter dem gesamten Bereich der lasersensitiven Schicht 4 ist die Hintergrundschicht 5 ausgebildet. Diese Hintergrundschicht 5 ist nicht transparent im sichtbaren Spektralbereich, so dass in diesem Bereich das Substrat 8 abgedeckt ist. Wie in den Figuren 1 und 2 zu erkennen ist, ist auf der Oberfläche des Substrats 8 eine Kennzeichnung 81 (siehe Figur 1) ausgebildet, die ausschließlich in dem Bereich außerhalb des Farbbildes 10y bzw. außerhalb der Hintergrundschicht 5 bei Betrachtung von oben her erkennbar ist (siehe Figur 2). Die Kennzeichnung 81 besteht aus einem Sicherheitsdruck 81 d, der bei dem Ausführungsbeispiel in Art von Guillochen ausgebildet ist. Ferner sind fluoreszierende Fäden 81f in dem Substrat und auf seiner Oberfläche angeordnet, die bei Bestrahlung durch UV-Licht reflektieren und im sichtbaren Spektralbereich als schwarze Fäden erscheinen. Außerdem ist als weitere Kennzeichnung in dem Substrat 8 ein Wasserzeichen 81w ausgebildet sowie ein Sicherheitsstreifen 81s. Der Sicherheitsstreifen 81s kann diverse Kennzeichnungs- und Individualisierungselemente aufweisen, wie z.B. eine Diffraktions- und/oder Hologrammstruktur, laserinduzierte Markierungen usw. Der Sicherheitsstreifen 81s ist bei dem dargestellten Ausführungsbeispiel in dem Substrat 8 eingearbeitet. Er durchläuft das Substrat auch unterhalb dem laserinduzierten Farbbild 10y und ist dort auf grund der nicht transparenten Hintergrundschicht 5 nicht sichtbar. Der Sicherheitsstreifen 81f ist lediglich in dem Bereich, in dem er über das laserinduzierte Bild 10y hinaus verläuft, sichtbar.As can be seen in FIG. 2, a laser-induced color image 10y is formed in the laser-sensitive layer. This color image 10y can be made by laser-induced bleaching of the layer 4 laser-sensitive material. The process of laser-induced bleaching will be described later in detail. Under the entire region of the laser-sensitive layer 4, the background layer 5 is formed. This background layer 5 is not transparent in the visible spectral range, so that the substrate 8 is covered in this area. As can be seen in FIGS. 1 and 2, a marking 81 (see FIG. 1) is formed on the surface of the substrate 8, which is recognizable exclusively in the area outside the color image 10 y or outside the background layer 5 when viewed from above (see Figure 2). The marking 81 consists of a security pressure 81 d, which is formed in the embodiment in the manner of guilloches. Further, fluorescent threads 81f are disposed in the substrate and on its surface, which reflect upon exposure to UV light and appear as black threads in the visible spectral range. In addition, a watermark 81w is formed as a further identification in the substrate 8 and a security strip 81s. The security strip 81s may have various identification and individualization elements, such as a diffraction and / or hologram structure, laser-induced markings, etc. The security strip 81s is incorporated in the substrate 8 in the illustrated embodiment. It also passes through the substrate below the laser-induced color image 10 y and is not visible there due to the non-transparent background layer 5. The security strip 81f is visible only in the area in which it extends beyond the laser-induced image 10y.

Bei dem in Figur 3 dargestellten Ausführungsbeispiel handelt es sich um eine Abwandlung des Ausführungsbeispiel in den Figuren 1 und 2. Bei diesem Ausführungsbeispiel in Figur 3 ist lediglich in der linken Hälfte des laserinduzierten Farbbildes 10y die Hintergrundschicht 5 ausgebildet, so dass lediglich in diesem linken Teilbereich, in dem die Hintergrundschicht 5 ausgebildet ist, die Kennzeichnung 81 auf dem Substrat 8 abgedeckt und nicht sichtbar ist. Im übrigen Bereich des laserinduzierten Bildes 10y ist keine Hintergrundschicht 5 angeordnet, so dass in diesem Bereich durch das farblich getönt transparente laserinduzierte Farbbild hindurch die Oberfläche des Substrats 8 und damit die Kennzeichnung 81 sichtbar ist. Mit diesem Ausführungsbeispiel ergibt sich besonders erhöhte Fälschungssicherheit, da das laserinduzierte Bild 10y besonders vielfältig mit den übrigen Kennzeichnungselementen optisch zusammenwirkt.In the embodiment shown in Figure 3 is a modification of the embodiment in Figures 1 and 2. In this embodiment in Figure 3, the background layer 5 is formed only in the left half of the laser-induced color image 10y, so that only in this left part in which the background layer 5 is formed, the identification 81 is covered on the substrate 8 and is not visible. In the remaining area of the laser-induced image 10y, no background layer 5 is arranged, so that the surface of the substrate 8 and thus the marking 81 are visible in this area through the color-tinted transparent laser-induced color image. This exemplary embodiment results in particularly increased protection against counterfeiting, since the laser-induced image 10y interacts in a particularly versatile manner with the other identification elements optically.

Bei abgewandelten Ausführungen können in den Folienschichten auch Diffraktions- und/oder Hologrammstrukturen ausgebildet sein. Die Figuren 5 und 6 zeigen Transferfolien, die eine derartige Diffraktions- und/oder Hologrammstruktur 5b in ihrem Schichtenaufbau aufweisen. Die Folie in Figur 5 entspricht in ihrem Aufbau der Folie in Figur 4, wobei lediglich zusätzlich zwischen der Schutzschicht 3 und der lasersensitiven Schicht 4 eine zusätzliche Lackschicht 5c und eine Reflexionsschicht 5r ausgebildet ist. Die Diffraktions- und/oder Hologrammstruktur 5b ist im Bereich der Lackschicht 5c, der Reflexionsschicht 5r und der lasersensitiven Schicht 4. ausgebildet. Bei dem Ausführungsbeispiel in Figur 6 ist die zusätzliche Lackschicht 5c als lasersensitive Schicht 4c ausgebildet. Bei diesem Ausführungsbeispiel ist somit zusätzlich zu der lasersensitiven Schicht 4 die lasersensitive Schicht 4c vorhanden, zwischen der die Reflexionsschicht 5r verläuft. Die lasersensitive Schichten 4 und 4c können jeweils aus dem gleichen lasersensitiven Material ausgebildet sein, alternativ aber auch aus zwei unterschiedlichen lasersensitiven Materialien. Bei sämtlichen in den Figuren 4 bis 6 dargestellten Ausführungsbeispielen ist unter der lasersensitiven Schicht 4 jeweils auf der zum Substrat gewandten Seite die Hintergrundschicht 5 ausgebildet, die wie in Verbindung mit den in den Figuren 1 bis 3 dargestellten Ausführungsbeispielen als Schutzschicht bei der Laserbehandlung sowie als Aufheller und Farbverstärker des laserinduzierten Bildes wirken kann.In modified embodiments, diffraction and / or hologram structures may also be formed in the film layers. FIGS. 5 and 6 show transfer foils which have such a diffraction and / or hologram structure 5b in their layer structure. The film in FIG. 5 corresponds in its construction to the film in FIG. 4, with only an additional resist layer 5c and a reflection layer 5r being additionally formed between the protective layer 3 and the laser-sensitive layer 4. The diffraction and / or hologram structure 5b is formed in the region of the resist layer 5c, the reflection layer 5r and the laser-sensitive layer 4. In the exemplary embodiment in FIG. 6, the additional lacquer layer 5c is designed as a laser-sensitive layer 4c. Thus, in this embodiment, in addition to the laser-sensitive layer 4, there is the laser-sensitive layer 4c between which the reflection layer 5r extends. The laser-sensitive layers 4 and 4c can each be formed from the same laser-sensitive material, but alternatively also from two different laser-sensitive materials. In all of the exemplary embodiments illustrated in FIGS. 4 to 6, the background layer 5 is formed underneath the laser-sensitive layer 4 on the side facing the substrate, which, as in connection with the exemplary embodiments illustrated in FIGS. 1 to 3, acts as a protective layer during laser treatment and as a brightener and color amplifier of the laser-induced image can act.

In den Figuren 7 bis 9 sind Laminierfolien dargestellt, die in ihrem Schichtenaufbau den Transferfolien der Figuren 5 bis 6 entsprechen. Die Overlay-Fofie 30 entspricht der Schutzschicht 3. Die übrigen Schichten: die lasersensitive Schicht 40, die Hintergrundschicht 50, die Reflexionsschicht 50r und die Kleberschicht 60 entsprechen der lasersensitiven Schicht 4, der Hintergrundschicht 5, der Reflexionsschicht 5r bzw. der Kleberschicht 6. In entsprechender Weise ist auch bei den Laminierfolien der Figuren 8 und 9 eine Diffraktions- und/oder Hologrammstruktur 50b vorgesehen, die der Diffraktions- und/oder Hologrammstruktur 5b der Figuren 5 und 6 entspricht.In the figures 7 to 9 laminating films are shown, which correspond in their layer structure of the transfer sheets of Figures 5 to 6. The overlay film 30 corresponds to the protective layer 3. The remaining layers: the laser-sensitive layer 40, the background layer 50, the reflective layer 50r, and the adhesive layer 60 correspond to the laser-sensitive layer 4, the background layer 5, the reflective layer 5r, and the adhesive layer 6, respectively appropriate way is also at 8 and 9, a diffraction and / or hologram structure 50b corresponding to the diffraction and / or hologram structure 5b of FIGS. 5 and 6 is provided.

Bei dem Ausführungsbeispiel in Figur 10 ist der Mehrschichtenkörper als ein aus diversen Overlay-Folien und Inlets laminierter Körper ausgebildet. Die oben angeordnete Overlay-Folie 30 weist an ihrer Unterseite mehrere Schichten auf, die durch Aufbringen einer Transferfolie auf der Overlay-Folie aufgebracht sind. Bei diesen Schichten handelt es sich um eine Lackschicht 5c, eine Reflexionsschicht 5r, eine lasersensitive Schicht 4, eine Hintergrundschicht 5 und eine Kleberschicht 6. Im Bereich der Lackschicht 5c, der Reflexionsschicht 5r und der lasersensitiven Schicht 4 ist eine Diffraktions- und/oder Hologrammstruktur 5b ausgebildet.In the embodiment in FIG. 10, the multilayer body is formed as a body laminated from various overlay foils and inlets. The overlay film 30 arranged on top has a plurality of layers on its underside which are applied by applying a transfer film to the overlay film. These layers are a lacquer layer 5c, a reflection layer 5r, a laser-sensitive layer 4, a background layer 5 and an adhesive layer 6. In the region of the lacquer layer 5c, the reflection layer 5r and the laser-sensitive layer 4 is a diffraction and / or hologram structure 5b formed.

Unterhalb dieses Folienverbands ist eine aus mit Kohlenstoff und/oder Ruß dotierten Material bestehende Overlay-Folie 32 angeordnet. Bei dieser dotierten Overlay-Folie handelt es sich um eine zweite lasersensitive Schicht. In dieser Schicht erfolgt bei entsprechender Lasereinwirkung eine Karbonisierung, wodurch bei entsprechender Einstellung der Laserbedingungen eine Graustufenmarkierung erhalten werden kann.Underneath this film dressing is an overlay film 32 consisting of material doped with carbon and / or carbon black. This doped overlay film is a second laser-sensitive layer. In this layer takes place with appropriate laser action a carbonization, which can be obtained with appropriate adjustment of the laser conditions, a grayscale marker.

Unterhalb dieser dotierten Overlay-Folie 32 sind Inlets 90 angeordnet, die bei dem dargestellten Ausführungsbeispiel aus Papiermaterial bestehen können. Auf der unteren Seite des unteren Inlets ist eine Overlay-Folie 30 und darauf eine weitere Overlay-Folie 30 angeordnet.Below this doped overlay film 32 inlets 90 are arranged, which may consist of paper material in the illustrated embodiment. On the lower side of the lower inlet, an overlay film 30 and thereon another overlay film 30 are arranged.

Um die laserinduzierte Markierung in der laserinduzierten Schicht zu erzeugen, erfolgt die Laserbestrahlung vorzugsweise bei auf dem Substrat aufgebrachter Folie bzw. Beschichtung. Alternativ kann die Laserbestrahlung jedoch auch vor dem Aufbringen, d.h. also unmittelbar durch Bestrahlung der Folie alleine durchgeführt werden. Eine Vollfarbenbilderzeugung, d.h. die Erzeugung einer laserinduzierten Markierung als Vollfarbenbild kann bei Ausführungsbeispielen durchgeführt werden, bei denen das lasersensitive Material aus einer Mischung aus einer Cyanpigmentkomponente, einer Magentapigmentkomponente und einer Gelbpigmentkomponente ausgebildet ist. Für ein solches Ausführungsbeispiel ist die Rezeptur der Schichten eine Heißprägefolie am Ende der Beschreibung angegeben.In order to generate the laser-induced marking in the laser-induced layer, the laser irradiation is preferably carried out when applied to the substrate film or coating. Alternatively, however, the laser irradiation can also be carried out before application, ie, directly by irradiation of the film alone. Full-color image formation, ie, the generation of a laser-induced mark as a full-color image, may be performed in embodiments in which the laser-sensitive material is formed from a mixture of a cyan pigment component, a magenta pigment component, and a yellow pigment component. For such an embodiment, the formulation of the layers is given a hot stamping foil at the end of the description.

Beim Bleichen wird in einem ersten Schritt eine blaue oder grüne oder rote Farbmarkierung erzeugt, in dem diese Stelle mit einer bestimmten Laserwellenlänge bestrahlt wird, mit der eine bestimmte Pigmentkomponente gebleicht wird.In bleaching, in a first step, a blue or green or red color mark is produced in which this spot is irradiated with a certain laser wavelength, with which a certain pigment component is bleached.

Um die Farbe Blau zu erzeugen, darf nur die Gelbpigmentkomponente gebleicht werden. Hierfür wird blaues Laserlicht eingesetzt. Für das Bleichen ist eine bestimmte Mindestintensität erforderlich. Ferner darf eine gewisse Pulsdauer nicht überschritten werden. Um im ersten Schritt eine grüne Farbmarkierung zu erhalten, darf nur die Magentapigmentkomponente gebleicht werden. Hierfür wird grünes Laserlicht eingesetzt. Um im ersten Schritt eine rote Farbmarkierung zu erhalten, darf nur die Cyanpigmentkomponente gebleicht werden. Hierfür wird rotes Laserlicht eingesetzt.To make the color blue, only the yellow pigment component should be bleached. For this purpose, blue laser light is used. Bleaching requires a certain minimum intensity. Furthermore, a certain pulse duration must not be exceeded. To get a green color mark in the first step, only the magenta pigment component should be bleached. For this purpose, green laser light is used. To get a red color mark in the first step, only the cyan pigment component should be bleached. For this purpose, red laser light is used.

Um an dieser Stelle eine Farbmarkierung in der Farbe Cyan oder Magenta oder Gelb zu erzeugen, wird diese Stelle in einem zweiten Schritt laserbehandelt, und zwar mit einer Laserwellenlänge, mit der eine der an dieser Stelle noch nicht gebleichten Pigmentkomponenten gebleicht wird. Wenn im ersten Schritt eine blaue Farbmarkierung erzeugt worden ist, sind an dieser Stelle die Cyanpigmentkomponente und die Magentapigmentkomponente ungebleicht. Um die Farbe Cyan an dieser Stelle zu erzeugen, muss die Magenta-Pigmentkomponente in diesem zweiten Schritt gebleicht werden. Dies erfolgt mit grünem Laserlicht. Es ergibt sich damit an dieser Stelle eine cyanfarbene Markierung.In order to produce at this point a color marking in the color cyan or magenta or yellow, this point is laser-treated in a second step, with a laser wavelength with which one of the not yet bleached at this point pigment components is bleached. If a blue color mark has been generated in the first step, the cyan pigment component is at this point and the magenta pigment component unbleached. To make the color cyan at this point, the magenta pigment component must be bleached in this second step. This is done with green laser light. This results in a cyan mark at this point.

Falls in dem zweiten Schritt anstelle dieser cyanfarbenen Markierung eine magentafarbene Markierung erhalten werden soll, muss die im ersten Schritt erzeugte blaue Farbmarkierung mit rotem Laserlicht behandelt werden. Dadurch wird das Cyanpigment an dieser Stelle gebleicht, so dass also das Magentapigment ungebleicht an dieser Stelle verbleibt. Es ergibt sich damit die magentafarbene Markierung an dieser Stelle.If, in the second step, a magenta mark is to be obtained instead of this cyan mark, the blue mark produced in the first step must be treated with red laser light. As a result, the cyan pigment is bleached at this point, so that the magenta pigment remains unbleached at this point. This results in the magenta marking at this point.

In entsprechender Weise lassen sich aus einer im ersten Schritt erzeugten grünen Farbmarkierung, die aus dort verbliebenem ungebleichten Cyanpigment und Gelbpigment gebildet wird, eine cyanfarbene Markierung oder eine gelbfarbene Markierung erzeugen, und zwar durch Behandlung mit blauem Laserlicht bzw. rotem Laserlicht.In a corresponding manner, a green color marking produced in the first step, which is formed from unbleached cyan pigment and yellow pigment remaining there, can produce a cyan-colored marking or a yellow-colored marking by treatment with blue laser light or red laser light.

In entsprechender Weise kann eine im ersten Schritt erzeugte rote Farbmarkierung im zweiten Schritt in eine gelbe oder magentafarbene Markierung umgewandelt werden, und zwar durch Laserbehandlung im zweiten Schritt mit grünem Laserlicht bzw. blauem Laserlicht.In a corresponding manner, a red color marking produced in the first step can be converted into a yellow or magenta marking in the second step by laser treatment in the second step with green laser light or blue laser light.

Um an der im ersten und zweiten Schritt behandelten Stelle eine transparente Stelle zu erhalten, d.h. eine weiße Stelle zu erhalten, wenn die Hintergrundschicht 5 weiß ist, muss in einem dritten Schritt diese Stelle mit einem Laserstrahl behandelt werden, dessen Wellenlänge so eingestellt ist, dass die an dieser Stelle nach dem zweiten Schritt ungebleicht verbliebene Pigmentkomponente gebleicht wird, d.h. die gelbe Farbmarkierung muss mit blauem Laserlicht, die magentafarbene Markierung mit grünem Licht und die cyanfarbene Markierung mit rotem Laserlicht gebleicht werden.In order to obtain a transparent spot at the point treated in the first and second step, ie to obtain a white spot when the background layer 5 is white, in a third step this point must be treated with a laser beam whose wavelength is adjusted so that at this point after the second step unbleached pigment component is bleached, ie the yellow color marking must be bleached with blue laser light, the magenta green light mark and the cyan mark with red laser light.

In gleicher Weise werden sodann in der lasersensitiven Schicht 4 weitere benachbarte Stellen behandelt, um weitere Farbmarkierungen in der Schicht 4 der Prägefolie zu erzeugen. Auf diese Weise kann ein Vollfarbenbild hergestellt werden.In the same way, further adjacent points are then treated in the laser-sensitive layer 4 in order to produce further color markings in the layer 4 of the stamping foil. In this way, a full-color image can be produced.

Laserbehandlung kann auch eingesetzt werden, um in dem Farbmittel bzw. den Farbmitteln in der lasersensitiven Schicht durch Farbumschlag Farbmarkierungen bzw. ein Vollfarbenbild zu erzeugen. Die Laserbehandlung kann in entsprechender Weise mit aufeinanderfolgenden Verfahrensschritten erfolgen. Als Farbmittel, d.h. farbgebende Substanzen kommen Pigmente in Frage. Diese sind meist unlöslich und es handelt sich in der Regel um anorganische Substanzen. Als Farbmittel kommen aber auch meist lösliche, organische Farbmittel in Frage. Der Farbumschlag erfolgt jeweils bei spezifischen Laserbedingungen, die bei der Laserbehandlung in den einzelnen Schritten dann angewandt werden.Laser treatment can also be used to produce color markers or a full-color image in the colorant or the colorants in the laser-sensitive layer by color change. The laser treatment can be carried out in a corresponding manner with successive process steps. As a colorant, i. Coloring substances are pigments in question. These are usually insoluble and are usually inorganic substances. As a colorant but also mostly soluble, organic colorants in question. The color change takes place in each case under specific laser conditions, which are then used in the laser treatment in the individual steps.

In entsprechender Weise kann das beschriebene Bleich- und Farbumwandlungsverfahren auch eingesetzt werden, wenn das lasersensitive Material nur aus einer oder zwei Farbmittelkomponenten besteht. Auch können andere Farbmittelkomponenten und andere Laserwellenlängenbereiche bei der Laserbehandlung eingesetzt werden.Similarly, the bleaching and color conversion process described can also be used if the laser-sensitive material consists of only one or two colorant components. Also, other colorant components and other laser wavelength ranges can be used in the laser treatment.

Die Laserbehandlung der Transferfolie zur Erzeugung der Farbmarkierungen kann alternativ auch vor dem Aufbringen der Folie erfolgen, und zwar insbesondere dann, wenn die Schutzschicht 3 als eine für Laserstrahlung nicht oder nur teilweise transparente Schicht oder eine für Laserstrahlung im bestimmten Wellenlängenbereich nicht transparente Schicht ausgebildet ist oder eine zusätzliche UV-absorbierende Schutzschicht vorgesehen ist. Die Laserbehandlung erfolgt dann vor dem Auftragen der Folie, in dem der Laserstrahl auf die Rückseite der Folie, d.h. auf die Hintergrundschicht 5 bzw. die Kleberschicht 6 gerichtet wird und somit die lasersensitive Schicht 4 also von der anderen Seite her behandelt wird, um darin die Farbmarkierungen in gleicher Weise zu erzeugen. Die Hintergrundschicht 5 und die Kleberschicht 6 sind bei diesen Anwendungen für die betreffende Laserstrahlung transparent oder zumindest teiltransparent oder nur in Teilbereichen aufgebracht.Alternatively, the laser treatment of the transfer film to produce the color markings may also take place before the application of the film, and in particular, if the protective layer 3 is formed as a layer which is not or only partially transparent to laser radiation or a layer which is not transparent for laser radiation in the specific wavelength range or if an additional UV-absorbing protective layer is provided. The laser treatment is then carried out before the application of the film in which the laser beam is directed to the back of the film, ie on the background layer 5 or the adhesive layer 6 and thus the laser-sensitive layer 4 is thus treated from the other side to therein To produce color markings in the same way. The background layer 5 and the adhesive layer 6 are transparent or at least partially transparent or applied only in partial areas in these applications for the laser radiation in question.

Die Schichten 2 bis 6 können nach folgenden Rezepturen hergestellt sein:The layers 2 to 6 can be produced according to the following recipes:

Ablöseschicht 2 (Trennschicht):Release Layer 2 (Release Layer):

Toluoltoluene 99,5 Teile99.5 parts Esterwachs (Tropfpunkt 90°C)Ester wax (dropping point 90 ° C) 0,5 Teile0.5 parts

Schutzschicht 3 (Schutzlackschicht):Protective layer 3 (protective lacquer layer):

Methylethylketonmethyl ethyl ketone 61,0 Teile61.0 parts DiaketonalkoholDiaketonalkohol 9,0 Teile9.0 parts Methylmethacrylat (Tg = 122°C)Methyl methacrylate (Tg = 122 ° C) 18,0 Teile18.0 parts Polyethylendispersion (23% in Xylol) (Erweichungspunkt 140°C)Polyethylene dispersion (23% in xylene) (softening point 140 ° C) 7,5 Teile7.5 parts Hochmolekulares Dispergieradditiv (40%, Aminzahl 20)High molecular weight dispersing additive (40%, amine number 20) 0,5 Teile0.5 parts Extender (Aluminiumsilikat)Extender (aluminum silicate) 4,0 Teile4.0 parts

Lasersensitive Schicht 4 (Erste Farblackschicht):Laser-sensitive layer 4 (first color coat layer):

Methylethylketonmethyl ethyl ketone 34,0 Teile34.0 parts Toluoltoluene 26,0 Teile26.0 parts Ethylacetatethyl acetate 13,0 Teile13.0 parts Cellulosenitrat (niedrigviskos, 65% in Alkohol)Cellulose nitrate (low viscosity, 65% in alcohol) 20,0 Teile20.0 parts Lineares Polyurethan (Fp.>200°C)Linear polyurethane (mp> 200 ° C) 3,5 Teile3.5 parts Hochmolekulares Dispergieradditiv (40%, Aminzahl 20)High molecular weight dispersing additive (40%, amine number 20) 2,0 Teile2.0 parts z.B.:    Pigment Blue 15:4For example: Pigment Blue 15: 4 0,5 Teile0.5 parts       Pigment Red 57:1Pigment Red 57: 1 0,5 Teile0.5 parts       Pigment Yellow 155Pigment Yellow 155 0,5 Teile0.5 parts

Hintergrundschicht 5 (Zweite Farblackschicht):Background layer 5 (second color coat layer):

Methylethylketonmethyl ethyl ketone 40,0 Teile40.0 parts Toluoltoluene 22,0 Teile22.0 parts Ethylen-Vinylacetat-Terpolymer (Fp.= 60°C)Ethylene-vinyl acetate terpolymer (mp = 60 ° C) 2,5 Teile2.5 parts Polyvinylchlorid (Tg: 89°C)Polyvinyl chloride (Tg: 89 ° C) 5,5 Teile5.5 parts Polyvinylchlorid (Tg: 40°C)Polyvinyl chloride (Tg: 40 ° C) 3,0 Teile3.0 parts Dispergieradditiv (50%, Säurezahl 51)Dispersing additive (50%, acid number 51) 1,0 Teile1.0 parts Titandioxid (d=3,8-4,2 g/cm3)Titanium dioxide (d = 3.8-4.2 g / cm 3 ) 26,0 Teile26.0 parts

Kleberschicht 6:Adhesive layer 6:

Methylethylketonmethyl ethyl ketone 55,0 Teile55.0 parts Toluoltoluene 12,5 Teile12.5 parts Ethanolethanol 3,5 Teile3.5 parts Polyvinylacetat (Erweichungspkt. 80°C)Polyvinyl acetate (softening point 80 ° C) 6,0 Teile6.0 parts Butyl-/Methylmethacrylat (Tg: 80°C)Butyl / methyl methacrylate (Tg: 80 ° C) 8,0 Teile8.0 parts Ethylmethacrylatharz (Tg: 63°C)Ethyl methacrylate resin (Tg: 63 ° C) 3,0 Teile3.0 parts Methacrylatcopolymer (Tg: 80°C)Methacrylate copolymer (Tg: 80 ° C) 5,0 Teile5.0 parts Ungesättigtes Polyesterharz (Erweichungspkt. 103°C)Unsaturated polyester resin (softening point 103 ° C) 3,5 Teile3.5 parts Siliziumdioxidsilica 3,5 Teile3.5 parts

Claims (16)

  1. Multilayer body comprising a layer composite formed with a substrate and having at least one layer with laser-sensitive material - called a laser-sensitive layer below
    characterized in that
    the layer composite has at least one background layer which is reflective and/or non-transparent and/or absorbent to the laser radiation used and which is assigned to the at least one laser-sensitive layer, by the background layer being arranged, at least in one subregion, on the side of the laser-sensitive layer facing the substrate, and which has the effect that, in layers underneath the background layer, no laser radiation or at least very little laser radiation is incident, so that substantial destruction of the substrate by the laser radiation used is prevented.
  2. Multilayer body according to Claim 1,
    characterized in that
    a plurality of layers of the layer composite, preferably the laser-sensitive layer and the background layer assigned to the latter, and preferably one or more further laser-sensitive layers, preferably with associated background layer, are arranged in a common overlay film or in a plurality of overlay films.
  3. Multilayer body according to one of the preceding claims, characterized in that the substrate is formed from at least one inlay.
  4. Multilayer body according to one of the preceding claims, characterized in that the substrate or at least one of the inlays is or are formed from paper material.
  5. Multilayer body according to one of the preceding claims, characterized in that the multilayer body is formed as a body laminated from a plurality of films, for example one or more overlay films and one or more inlays, preferably inlay films.
  6. Multilayer body according to Claim 1, characterized in that the multilayer body is formed as a transfer film, preferably a hot embossing film, or as a laminating film.
  7. Multilayer body according to Claim 6, characterized in that the background layer is transparent to light in the visible spectral range and/or is transparent or non-transparent to laser radiation only under specific laser conditions, in particular only specific laser wavelengths and/or angles of incidence, is preferably transparent or non-transparent to the laser radiation used which is used to produce a laser-induced marking in the laser-sensitive layer.
  8. Multilayer body according to one of the preceding Claims 1 to 7, characterized in that the background layer under the laser-sensitive layer is arranged only in one subregion or in the entire region of the laser-sensitive layer, preferably under the region in which the arrangement of a laser-induced marking is envisaged.
  9. Multilayer body according to one of the preceding Claims 1 to 8, characterized in that the background layer is arranged immediately adjacent to and lying on the laser-sensitive layer assigned to it.
  10. Multilayer body according to one of the preceding Claims 1 to 9, characterized in that at least one intermediate layer is arranged between the background layer and the laser-sensitive layer assigned to it.
  11. Multilayer body according to one of the preceding Claims 1 to 10, characterized in that a plurality of laser-sensitive layers are formed at least partly over one another and a background layer is arranged, at least in some regions, between two laser-sensitive layers arranged above one another.
  12. Multilayer body according to one of the preceding Claims 1 to 11, characterized in that a laser-induced marking can be produced in the laser-sensitive material of the laser-sensitive layer under the action of laser radiation, preferably by means of laser-induced bleaching and/or a laser-induced colour change and/or laser-induced blackening.
  13. Multilayer body according to Claim 12, characterized in that the laser-sensitive material is formed as a mixture of different laser-sensitive components.
  14. Multilayer body according to Claim 13, characterized in that at least two, preferably three, different laser-sensitive components are contained in the mixture and can be changed, preferably bleached, by means of a laser under laser conditions that are respectively specific to the components, it being true of each of the two or three components that, under the laser conditions specific to one component, the other or the two other components cannot or substantially cannot be changed, preferably bleached.
  15. Multilayer body according to one of Claims 12 to 14, characterized in that the laser-sensitive material has a cyan colorant, preferably a cyan pigment, and/or a magenta colorant, preferably a magenta pigment, and/or a yellow colorant, preferably a yellow pigment.
  16. Multilayer body according to Claim 15, characterized in that the cyan pigment is formed as a colorant that can be bleached with red laser light, and/or in that the magenta colorant is formed as a colorant that can be bleached with green laser light, and/or in that the yellow colorant is formed as a colorant that can be bleached with blue laser light.
EP02742735A 2002-05-08 2002-05-08 Multilayer body with a layer having at least one laser-sensitive material Expired - Lifetime EP1509404B1 (en)

Applications Claiming Priority (1)

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PCT/DE2002/001676 WO2003095225A1 (en) 2002-05-08 2002-05-08 Multilayer body with a layer having at least one laser-sensitive material

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EP1509404A1 EP1509404A1 (en) 2005-03-02
EP1509404B1 true EP1509404B1 (en) 2007-08-22

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US (1) US7220479B2 (en)
EP (1) EP1509404B1 (en)
JP (1) JP4411394B2 (en)
CN (1) CN100406275C (en)
AT (1) ATE370845T1 (en)
AU (1) AU2002344932A1 (en)
DE (2) DE50210783D1 (en)
ES (1) ES2292773T3 (en)
WO (1) WO2003095225A1 (en)

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DE102004022080A1 (en) 2004-05-05 2005-11-24 Giesecke & Devrient Gmbh Value document with visually recognizable markings
EP1652688A1 (en) * 2004-10-29 2006-05-03 Arjowiggins Security Security device
DE102008012419A1 (en) † 2007-10-31 2009-05-07 Bundesdruckerei Gmbh Polymer composite layer for security and/or valuable documents comprises at least two interlocking polymer layers joined together with a surface printed with a printed layer absorbing in the visible region in and/or on the composite
DE102007055356A1 (en) 2007-11-19 2009-05-20 Tesa Ag Laser inscribable foil
US8120811B2 (en) * 2007-11-21 2012-02-21 Quad/Graphics, Inc. System and method for adding data to a printed publication
EP2240831B1 (en) 2008-01-24 2015-03-25 Quad/Graphics, Inc. Printing using color changeable material
EP2109014A1 (en) * 2008-04-08 2009-10-14 JDS Uniphase Corporation Improved OVD containing device
DE102008034021A1 (en) * 2008-07-16 2010-01-21 Merck Patent Gmbh Method for producing a security and / or value product with random pattern and correlated identity string
DE102009033762A1 (en) * 2009-07-17 2011-01-27 Leonhard Kurz Stiftung & Co. Kg Method for producing a multilayer body and multilayer body
US9662833B2 (en) 2012-06-04 2017-05-30 Sabic Global Technologies B.V. Marked thermoplastic compositions, methods of making and articles comprising the same, and uses thereof
CN104894919B (en) * 2015-06-10 2016-11-02 北京大学 A kind of anti-fake material and preparation method thereof and equipment
CN107972332B (en) * 2016-10-21 2020-11-27 康美包（苏州）有限公司 Sheet-like composite material, in particular for producing dimensionally stable food containers, having a first color code and a second color code with a two-dimensional code
JP7131976B2 (en) 2018-06-20 2022-09-06 株式会社東芝 Recording medium and recording device
JP7178011B2 (en) 2018-10-10 2022-11-25 東芝インフラシステムズ株式会社 Recording medium and recording device
JP7395398B2 (en) 2020-03-24 2023-12-11 株式会社東芝 laser recording device

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EP0219011B1 (en) * 1985-10-15 1992-01-08 GAO Gesellschaft für Automation und Organisation mbH Identity card with a visually detectable authenticity feature, and method of making it
US4908285A (en) * 1987-05-18 1990-03-13 Canon Kabushiki Kaisha Hologram member
EP2309339B1 (en) 1999-01-19 2016-11-30 Dai Nippon Printing Co., Ltd. Relief hologram or diffraction grating sheet and forgery-preventing sheet comprising the same
DE10047450A1 (en) 2000-09-21 2002-04-11 Orga Kartensysteme Gmbh Product with a security element

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JP2005529003A (en) 2005-09-29
JP4411394B2 (en) 2010-02-10
CN1649748A (en) 2005-08-03
DE50210783D1 (en) 2007-10-04
WO2003095225A1 (en) 2003-11-20
AU2002344932A1 (en) 2003-11-11
DE10297780D2 (en) 2005-05-12
CN100406275C (en) 2008-07-30
US7220479B2 (en) 2007-05-22
ES2292773T3 (en) 2008-03-16
ATE370845T1 (en) 2007-09-15
US20050181498A1 (en) 2005-08-18
AU2002344932A8 (en) 2003-11-11
EP1509404A1 (en) 2005-03-02

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