EP2454100B1 - Procédé de fabrication d'un corps multicouche et corps multicouche - Google Patents

Procédé de fabrication d'un corps multicouche et corps multicouche Download PDF

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Publication number
EP2454100B1
EP2454100B1 EP10732309.9A EP10732309A EP2454100B1 EP 2454100 B1 EP2454100 B1 EP 2454100B1 EP 10732309 A EP10732309 A EP 10732309A EP 2454100 B1 EP2454100 B1 EP 2454100B1
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EP
European Patent Office
Prior art keywords
layer
region
carrier
decorative
structured
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP10732309.9A
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German (de)
English (en)
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EP2454100A2 (fr
Inventor
Ludwig Brehm
René Staub
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
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Leonhard Kurz Stiftung and Co KG
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Publication of EP2454100A2 publication Critical patent/EP2454100A2/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/40—Manufacture
    • B42D25/405—Marking
    • B42D25/41—Marking using electromagnetic radiation
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/328—Diffraction gratings; Holograms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/40—Manufacture
    • B42D25/405—Marking
    • B42D25/43—Marking by removal of material
    • B42D25/445—Marking by removal of material using chemical means, e.g. etching
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/40—Manufacture
    • B42D25/45—Associating two or more layers
    • B42D25/465—Associating two or more layers using chemicals or adhesives
    • B42D25/47—Associating two or more layers using chemicals or adhesives using adhesives
    • 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
    • Y10T428/24521—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness with component conforming to contour of nonplanar surface
    • 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
    • Y10T428/24521—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness with component conforming to contour of nonplanar surface
    • Y10T428/24529—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness with component conforming to contour of nonplanar surface and conforming component on an opposite nonplanar surface
    • 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.]
    • Y10T428/24835—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] including developable image or soluble portion in coating or impregnation [e.g., safety paper, 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.]
    • Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
    • 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.]
    • Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
    • Y10T428/2495—Thickness [relative or absolute]

Definitions

  • the invention relates to a method for producing a multilayer body having a carrier layer and a single-layer or multi-layer decorative layer formed on and / or in the carrier layer, as well as a multi-layer body obtainable therefrom according to claims 1 to 15.
  • optical security elements are often used to make it difficult to copy documents or products to prevent their misuse.
  • optical security elements find use for securing documents, banknotes, credit and debit cards, ID cards, packaging of high-quality products and the like.
  • optically variable elements it is known to use optically variable elements as optical security elements which can not be duplicated by conventional copying methods.
  • security elements with a structured metal layer, which is in the form of a text, logos or other pattern.
  • a structured metal layer from a metal layer applied in a planar manner requires a large number of processes, in particular if fine structures are to be produced which have a high degree of protection against counterfeiting. That's the way it is, for example It is known to partially demetallize a metal layer applied over the entire area by positive or negative etching or by laser ablation and to structure it. Alternatively, it is possible to apply metal layers by means of using vapor masks already in structured form on a support.
  • a method for producing a multilayer body which has a replication layer in which a diffractive first relief structure is molded is molded. Then, in one embodiment, a metal layer is applied over the entire area, and a photosensitive layer is applied to the metal layer.
  • the fact that the metal layer in the region of the diffractive first relief structure allows a higher transmission than outside this region results in the exposure of the photosensitive layer in the region of the diffractive first relief structure, but not outside it.
  • the exposed area can be removed leaving the unexposed area, or vice versa.
  • the WO 03/095745 A1 discloses a multilayer body having a layer structure comprising at least one layer containing a laser-sensitive material.
  • the steps a) to e) of the process according to the invention are preferably carried out in the order indicated.
  • the photoactivatable layer by means of said electromagnetic radiation from the side of the carrier layer facing away from the photoactivatable layer through the decorative layer, it acts on the first area and the second area Area defining decorative layer as an exposure mask, since the first region has a transmittance, which is lowered compared to the transmittance of the second region.
  • Such a method allows the formation of particularly forgery-proof multilayer body.
  • the decorative layer during the manufacture of the multilayer body serves as an exposure mask for an exposure, i. a photoactivation, the photoactivatable resist layer and the finished multilayer body for decoration.
  • the decorative layer thus fulfills several completely different functions.
  • the decorative layer is designed such that a viewer of an article decorated by means of the multilayer body can view the at least one structured layer through the decorative layer.
  • the typical transmission of the first regions of the decorative layer is thus at least an order of magnitude larger than the typical transmission of a conventional exposure mask, e.g. made of metal.
  • the resist layer is patterned in register with the first and second regions of the decorative layer, ie the structures of the structured resist layer are arranged in register with the first and second regions of the decorative layer.
  • the at least one layer to be structured is patterned in register with the resist layer. The method therefore permits the formation of at least three layers formed in register with respect to one another: the decorative layer, the resist layer and the at least one layer to be structured.
  • the at least one layer to be structured is formed as a structured layer.
  • the multilayer body has the structured layer register-accurate in the first region or in the second region of the decorative layer.
  • Register or register accuracy is to be understood as meaning the positional arrangement of superimposed layers.
  • the register accuracy or register accuracy of the layers is preferably controlled by means of register marks or register marks, which at all Layers are equally present and where, preferably by means of optical detection methods or sensors, it can be easily recognized whether the layers are arranged in the register. Register accuracy is given in both dimensions, ie length and width of the layers.
  • a layer comprises at least one layer.
  • a decorative layer comprises one or more decorative and / or protective layers, in particular formed as paint layers.
  • the decorative layers can be arranged over the entire surface or in pattern-like structured form on the carrier layer.
  • the one or more decorative layers can be arranged on one or both sides of the carrier layer, which is formed for example as a base or carrier film.
  • the decorative layer comprises at least one layer which weakens the electromagnetic radiation with the wavelength suitable for photoactivation.
  • the decorative layer has an optical density greater than zero with respect to the electromagnetic radiation having the wavelength suitable for photoactivation.
  • the formation of the exposure mask as a decorative layer inevitably results in an absolutely 100% registration accuracy of the exposure mask to the decorative layer, i.
  • the decorative layer itself acts at least in areas as an exposure mask.
  • the decorative layer and the exposure mask thus form a common functional unit.
  • the layer to be structured can be registered in register with the components without additional technological effort
  • Decorative layer defined first and second areas are structured.
  • the problem may arise that by previous, In particular, thermally and / or mechanically straining, process steps caused linear and / or non-linear distortions in the multilayer body can not be compensated completely by an alignment of the mask on the multilayer body over the entire surface of the multilayer body, although the mask alignment on existing, preferably on the horizontal and / or vertical edges of the multilayer body arranged register or registration marks takes place.
  • the first and second regions defined by the decorative layer are used as a mask, wherein the parts of the decorative layer defining the first and second regions are applied in an early process step during the production of the multilayer body.
  • the mask designed as a decorative layer is therefore subjected to all subsequent process steps of the multilayer body, and thus automatically follows all the distortions possibly caused by these process steps in the multilayer body itself.
  • the tolerances or registration accuracies in the method according to the invention are based only on possibly not absolutely exactly formed edges of the first and second regions, the quality of which is determined by the particular manufacturing method used.
  • the tolerances or register accuracies in the method according to the invention are approximately in the micrometer range, and thus far below the Resolving power of the eye; ie the unarmed human eye can no longer perceive existing tolerances.
  • the resist layer is exposed to different areas in different areas.
  • This different exposure of the resist layer is due to the different transmittances in the first and the second region of the decorative layer, but independent of any existing relief structure, in particular independent of a relief structure formed in the carrier film or in a layer arranged on the carrier film. In other words, the different exposure of the resist layer is not due to a relief structure.
  • the structuring of the at least one layer to be patterned and the photoactivatable resist layer, which is arranged on the first side of the carrier layer, is determined by the differently intense exposure of the resist layer, which in turn is defined by the first and the second region of the decorative layer;
  • the structuring is independent of any existing relief structure and not due to a relief structure, in particular independent of a in the carrier film or in a layer arranged on the carrier film shaped relief structure.
  • the boundaries of the first and the second region of the decorative layer thus correspond, seen perpendicular to the plane of the carrier layer, the boundaries of structuring the at least one layer to be patterned and the photoactivatable resist layer, but are independent of and not limited by boundaries, in particular contours of a relief structure ,
  • the decorative layer is used as an exposure mask by the formation of the first region and the second region, the exposure mask thus formed being independent of an optionally existing relief structure, in particular independently of one in the carrier film or in one on the Carrier film arranged Layer shaped relief structure.
  • the at least one layer to be patterned and the resist layer are patterned in registration with each other by means of mutually synchronized structuring processes, this structuring being dependent on the first and second regions of the decorative layer, but independent of any relief structure, in particular independently of a relief structure formed in the carrier film or in a layer arranged on the carrier film.
  • the function of the decorative layer as an exposure mask is independent of the layer to be structured.
  • the physical properties, in particular the effective thickness or the optical density, of the layer to be structured have no influence on or are independent of the physical properties of the decorative layer, i. the exposure mask, in particular the degrees of transmission in the first and the second region of the decorative layer.
  • the decorative layer alone and detached from any existing relief structures, in particular diffractive relief structures and other, in particular physical and / or chemical properties of the layer to be structured determines the exposure mask according to the invention.
  • the at least one layer prefferably be structured to have a constant layer thickness over the entire surface on which it is arranged on the first side of the carrier layer.
  • the decorative layer comprises a first lacquer layer which is arranged in the first region with a first layer thickness and in the second region either not or with a smaller second layer thickness than the first layer thickness on the carrier layer, so that the decorative layer in the first region the said first transmittance and in the second region the said second transmittance.
  • the decorative layer comprises a first coloring of the carrier layer which is formed in the first region with a first layer thickness and in the second region either not or with a smaller compared to the first layer thickness second layer thickness, so that the decorative layer in the first region has said first transmittance and in said second region said second transmittance.
  • the coloring of the carrier layer may be formed as a colored or discolored area within the carrier layer.
  • a preferred method for forming a coloring of the carrier layer is a laser marking in the carrier layer with color change or a method in which to diffuse pigments or dyes into the carrier layer.
  • carrier layers are for example in the EP 0 991 523 B1 or the EP 0 797 511 B1 described.
  • An example of a process for diffusing pigments or dyes is the printing of the carrier layer with a solvent-containing color coat, the subsequent temporary exposure to the color coat and the subsequent washing off of the color coat.
  • the surface of the material of the carrier layer is partially attacked by the solvent (s) in the color coat, whereby parts of the color ink can diffuse at least into the upper layers of the carrier layer located in the region of the attacked surface.
  • the material of the carrier layer is to be selected so that it can be attacked by a solvent used in the paint.
  • a combination may be, for example, a carrier layer of polycarbonate and a lake based on aromatic solvents. After removal of the paint remains the diffused component of the color coat in the carrier layer.
  • the blur is also only in this range of 1 to 10 .mu.m and thus far below the resolution of the eye.
  • Another example of a process for diffusing pigments or dyes is the partial printing of a carrier layer with a lift-off lacquer for covering the second regions. Subsequently, the support layer is exposed to an atmosphere of a vaporized colorant, for example, an atmosphere of an inert gas such as argon or nitrogen and vaporized iodine. In the first areas not covered by the liftoff paint, the vaporized colorant now diffuses into the carrier layer. Subsequently, the liftoff paint can be removed.
  • a vaporized colorant for example, an atmosphere of an inert gas such as argon or nitrogen and vaporized iodine.
  • apolar solvents such as toluene or benzine
  • UV ultraviolet
  • the lift-off lacquer must be resistant to the solvents of the bath, eg as a water-soluble lift-off lacquer.
  • the dye and optionally the UV blocker diffuse into the first areas of the carrier layer not covered by the lift-off lacquer in the bath and thereby color the carrier layer. Subsequently, the lift-off lacquer can be removed from the carrier layer.
  • an additional mask can be used, which is arranged between the thermal print head and the carrier layer and covers areas of the carrier layer which are not to be inked.
  • a layer of the decorative layer is formed in regions in different thickness on and / or within the carrier layer. It is possible that a layer of the decorative layer is formed as a layer of substantially uniform thickness and the layer is only partially, i. is formed in a pattern-shaped pattern, on and / or within the carrier layer. In this case, it is possible for the decorative layer to comprise only layers applied on one side of the carrier layer or layers applied on both sides of the carrier layer.
  • a multilayer body having a carrier layer which has a first side and a second side, and a single-layer or multi-layer decorative layer which is formed on and / or in the carrier layer and which comprises a first region and a second region wherein the decorative layer has a first transmittance in the first region perpendicular to the plane of the carrier layer and a second transmittance greater in the second region than the first transmittance, said transmittances being suitable for electromagnetic radiation with one suitable for photoactivation Wavelength, wherein the multi-layer body also has at least one structured in the register to the first region and the second region layer.
  • the multilayer body according to the invention can be used, for example as a label, laminating, hot stamping or transfer film, to provide an optical security element used for securing documents, banknotes, credit and debit cards, identity cards, packaging of high-quality products and the like.
  • the decorative layer and the at least one register-specific arranged structured layer can serve as optical security element.
  • first area and / or in the second area
  • the object is arranged so that the object and the first and / or the second area of the decorative layer perpendicular to the plane of Overlap carrier layer seen.
  • first area and second area will be applied to other objects, e.g. Layers / layers transferred to the multilayer body.
  • a first / second region of an article means that the first / second region of the decorative layer and the first / second region of the article are congruent when viewed perpendicular to the plane of the carrier layer.
  • the exposure mask formed by the decoration layer includes the first region and the second region that have a different transmittance with respect to the radiation used in the exposure.
  • the exposure mask therefore, has no area absolutely impermeable to the radiation used in the exposure, but only a region with a higher transmittance and a region with a lower transmittance, and therefore may be referred to as a halftone mask.
  • the area of the photoactivatable layer exposed through the first area is activated to a lesser extent than the area of the photoactivatable layer exposed through the second area, since the first area has a smaller transmittance than the second area.
  • Exposure is the selective irradiation of a photoactivatable layer through an exposure mask with the aim of locally modifying the solubility of the photoactivatable layer by a photochemical reaction.
  • photoactivatable layers which can be formed as photoresists:
  • a first type of photoactivatable layers eg negative resist
  • their solubility decreases by exposure compared to unexposed areas of the layer
  • their solubility increases by exposure to unexposed areas of the layer, for example, because the light results in the decomposition of the layer.
  • a solvent such as a caustic or acid.
  • a solvent dissolves the material of the resist layer, ie, the positive photoresist disposed in the second region, faster and better than the material of the resist layer disposed in the first region.
  • the layer to be structured is removed in the first or second region in which the resist layer has been removed.
  • This can be done by an etchant such as an acid or alkali.
  • the partial removal of the resist layer in the first or second region and the regions of the layer to be structured which are thereby exposed in the first or second region occur in the same process step.
  • a solvent / etchant such as a caustic or acid, which is capable of producing both the resist layer-in the case of a positive resist in the exposed region, in the case of a negative resist in the unexposed region-and the structure to be structured To remove layer, ie both materials are attacking.
  • the resist layer must be formed in such a way that it, the solvent or etchant used in the exposure of a positive resist in the unexposed area, the use of a negative resist in the exposed area for at least a sufficient time, i. withstands the exposure time of the solvent or etchant.
  • Leaving the resist on the patterned layer may be particularly advantageous if it is considered to be relatively stable Negative-resist is executed and colored.
  • the resist can be printed to with two or more colors too. Thus, when viewing the multi-layer body from different sides different color impressions can be realized.
  • the resist layer is exposed from the side of the carrier layer facing away from the resist layer by means of the said electromagnetic radiation, the decorative layer serving as an exposure mask by forming the at least one first region and the at least one second region.
  • the at least one layer to be structured is structured by means of the photoactivatable layer removed after exposure in the at least one first region or the at least one second region in register with the at least one first region and the at least one second region.
  • the resist layer comprises a UV-activatable material.
  • UV radiation can be used for the exposure step d).
  • the exposure step d) is designed such that the radiation completely penetrates the resist layer, that is, it reaches its outer surface facing away from the carrier layer. Only then is it easily possible to remove the resist by means of a solvent from the side of the outer surface of the resist layer. If the resist is not completely irradiated, it generally has a "skin" on its outer surface facing away from the carrier layer, which at least partially prevents the attack of a solvent.
  • carrier material based on PVC and PVC copolymer carrier material based on PVC and PVC copolymer
  • Support material based on polyvinyl alcohol and polyvinyl acetate polyester support based on aliphatic raw materials.
  • the thickness and the material of the decorative layer are chosen so that electromagnetic radiation with the suitable wavelength for the photoactivation partially penetrates the decorative layer in the first region.
  • the exposure mask formed by the decorative layer is therefore designed to be radiation-permeable in the first region.
  • the thickness and the material of the decorative layer are chosen such that the ratio between the second and the first transmittance is equal to or greater than two.
  • the ratio between the first and the second transmittance is preferably 1: 2, also referred to as contrast 1: 2.
  • a contrast of 1: 2 is at least an order of magnitude lower than with conventional masks. It has not been customary to use a mask for an exposure of a resist layer, which has such a low contrast as the decorative layer described here. When exposing a resist with a conventional mask (eg a chrome mask) opaque, ie with OD> 2, and completely transparent areas are present; So the mask has a high contrast.
  • a conventional mask eg a chrome mask
  • At least one functional layer in particular a release layer and / or a protective lacquer layer, to be arranged between the carrier layer and the at least one layer to be structured, preferably directly on the first side of the carrier layer.
  • This is advantageous in particular when using the multilayer film as a transfer film, in which the functional layer enables a problem-free detachment of the carrier layer from a transfer layer comprising at least one layer of the decorative layer and the structured layer.
  • the thickness and the material of the decorative layer is selected such that the electromagnetic radiation, measured after passing through a layer package consisting of the carrier layer, the at least one functional layer and the decorative layer, in the first region has a transmittance of about 0.3 and in the second region has a transmittance of about 0.7.
  • Such a contrast between the two regions formed as different transmission regions, i. the first and the second region is sufficient, in particular for a positive resist layer.
  • At least one relief structure is formed on the first side of the carrier layer, and that the at least one layer to be structured is arranged on the surface of the at least one relief structure.
  • it may be provided to arrange a replication layer on the first side of the carrier layer and to impress the at least one relief structure in a surface of the replication layer facing away from the carrier layer.
  • it can also be provided to impress the at least one relief structure directly into the carrier layer.
  • a replication layer is generally understood as meaning a layer which can be produced superficially with a relief structure. These include, for example, organic layers such as plastic or lacquer layers or inorganic layers such as inorganic plastics (eg silicones), glass layers, semiconductor layers, metal layers, etc., but also combinations thereof. It is preferred that the replication layer is formed as a replicate varnish layer.
  • a radiation-curable replication layer can be applied to the carrier layer, a relief can be shaped into the replication layer, and the replication layer can be cured with the embossment embossed therein.
  • the relief is a light diffractive or refractive or light scattering, microscopic or macroscopic structure, such as a diffractive structure or a diffraction grating or a matt structure or combinations of light diffractive or refractive or light scattering, microscopic or macroscopic structures, such as diffractive structures, matt structures or Diffraction grating is formed.
  • the at least one relief structure can be arranged at least partially in the first region and / or in the second region.
  • the surface layout of the relief structure can be adapted to the surface layout of the first and second regions, in particular in the register, or the surface layout of the relief structure is designed, for example, as a continuous endless pattern independent of the surface layout of the first and second regions.
  • the inventive arrangement of the resist layer on the first side of the carrier layer so that the resist layer is disposed on the side facing away from the carrier layer side of at least one layer to be structured and the decorative layer on the other side of the at least one layer to be structured it is possible to arrange the layer to be structured at least partially on a relief structure, in contrast to patterning process using washcoat.
  • silica and the titanium dioxide by mechanical action destructive effect on the surface of the replication roller, in particular with a nickel surface.
  • the differences in level between the washcoat layer and the underlying layer into which the relief structure is to be imprinted impede replication.
  • a leveling layer is applied on the first side of the carrier layer.
  • the layer to be structured is formed as a structured layer.
  • the patterned layer and the resist layer are removed in the first or the second region and exist in the other region.
  • the leveling layer may comprise one or more different layer materials.
  • the compensation layer may be formed as a protective and / or adhesive and / or decorative layer.
  • the substrate can be, for example, paper, cardboard, textile or another fibrous material, or a plastic and in that case flexible or predominantly rigid.
  • At least one layer of the decorative layer is applied to the second side of the carrier layer.
  • one or more layers of the at least one layer can be removed again after the exposure step in which the decorative layer serves as an exposure mask. It is therefore possible in that one or more layers of the at least one layer of the decorative layer applied to the second side of the carrier layer are removed from the carrier layer after the exposure step d).
  • the visible light decorative layer having a wavelength in a range of about 380 to 750 nm is at least partially transmissive. It is possible if the decorative layer is colored with at least one opaque and / or at least one transparent colorant which is colored or color-producing at least in one wavelength range of the electromagnetic spectrum, in particular colorfully colorful or color-producing, in particular that a colorant contained in the decorative layer is that can be excited outside the visible spectrum and produces a visually recognizable colored impression.
  • the coloring can be substantially constant over the entire inked surface area or as a particular continuous color gradient, for example, a linear or radial gradient, be formed, i.
  • the coloring has a gradient, wherein the coloring may in particular vary between two or more shades, for example from red to blue and further to green or between one or more shades and an achromatic, for example between red and transparent, d. H. a non-colored decorative layer.
  • Such color gradients are known and widely used in security printing because their forgery is difficult.
  • the decorative layer fulfills a dual function.
  • the decorative layer serves as an exposure mask for the formation of at least one structured Layer, which is arranged register accurate to the first and second region of the decorative layer.
  • the decorative layer serves as an exposure mask for a partial demetallization of a metal layer.
  • the decorative layer, or at least one or more layers of the decorative layer serves on the multi-layer body as an optical element, in particular as a single- or multi-colored ink layer for coloring the at least one structured layer, the ink layer registering over and / or next to / adjacent to the at least one structured layer is arranged.
  • the multi-layer body in the first area or the second area to have a photo-activatable resist layer, wherein the at least one structured layer and the resist layer are arranged precisely aligned with one another on the first side of the carrier layer such that the resist layer is arranged on the side facing away from the carrier layer side of the at least one structured layer and the decorative layer on the other side of the at least one structured layer.
  • the decorative layer comprises a first lacquer layer which is arranged in the first region with a first layer thickness and in the second region either not or with a smaller second layer thickness compared to the first layer thickness on the carrier layer, so that the decorative layer in the first region the said first transmittance and in the second region the said second transmittance.
  • the decorative layer comprises a first coloring of the carrier layer, which is formed in the first region with a first layer thickness and in the second region either not or with a smaller compared to the first layer thickness second layer thickness, so that the decorative layer in the first region has said first transmittance and in said second region said second transmittance.
  • the ratio between the second transmittance and the first transmittance is greater than two.
  • At least one relief structure is formed on the first side of the carrier layer and the at least one layer to be structured is arranged on the surface of the at least one relief structure.
  • a replication layer it is possible for a replication layer to be arranged on the first side of the carrier layer and for the at least one relief structure to be embossed in a surface of the replication layer facing away from the carrier layer.
  • the at least one relief structure is embossed in the carrier layer.
  • the relief structure is formed as a diffractive relief structure. It is preferred if the at least one relief structure is arranged at least partially in the first region and / or in the second region.
  • the compensating layer is formed as an adhesion layer, eg adhesive layer. It is possible that at least one layer of the decorative layer is arranged on the second side of the carrier layer. It is possible that the decorative layer at least two, different color impressions comprises causing lacquer layers. It is possible that the decorative layer comprises a first lacquer layer, which is applied only partially on the carrier layer, and a second lacquer layer, which is applied over the entire surface of the carrier layer comprises.
  • the at least one structured layer is not limited to the mentioned exemplary embodiments.
  • the layer to be patterned may be any material that is vulnerable, ie detachable or removable, to a solvent or etchant. It is possible for the at least one structured layer to have a thickness in the range from 20 to 1000 nm, in particular from 20 to 100 nm.
  • the patterned layer of the multi-layered body as a reflection layer for light incident from the side of the replication layer.
  • the combination of a relief structure of the replication layer and a structured layer arranged thereunder, for example as a metal layer, generates a multiplicity of different optical effects that can be used effectively for safety aspects.
  • the structured layer may consist of metal, for example aluminum or copper or silver, which is galvanically reinforced in a subsequent process step.
  • the metal used for galvanic reinforcement may be the same or different than the metal of the patterned layer.
  • An example is, for example, the galvanic reinforcement of a thin silver layer with copper.
  • the resist layer has a thickness in the range of 0.3 to 3 ⁇ m. It has been found to be useful if the resist layer is formed as an etch resist, the resist layer, if formed as a positive photoresist, in the unexposed area and, if it is a negative photoresist is formed, in the exposed region opposite to the layer to be structured etching etchant has a high resistance, which is sufficient to prevent the access of the etchant to the layer to be structured in the area covered by the resist layer substantially at least until the etchant has removed the layer to be structured in the desired area.
  • the said desired area is, if the resist layer is formed as a positive photoresist, the exposed area and, if the resist layer is formed as a negative photoresist, the unexposed area.
  • the decorative layer has a thickness in the range of 0.5 to 5 microns. It is possible that the decorative layer or highly disperse dyes pigments, in particular a Mikrolith ® -K pigment dispersion has. This is particularly advantageous in a colored decorative layer with pigment content. It is possible that UV absorbers may be added to the decor layer forming material, especially if this material contains relatively few pigments or other UV absorbing components. It is possible that the decorative layer inorganic absorber with high Streuanteilteil, in particular nanoscale UV absorber based on inorganic oxides having. In particular, TiO 2 and ZnO have been found to be suitable oxides in highly dispersed form, as used in sunscreen creams with a high sun protection factor.
  • the decorative layer has organic absorbers, in particular benzotriazole derivatives, with a mass fraction in the range of about 3% to 5%. Suitable organic absorbers are sold under the trade name Tinuvin ® from Ciba, Basel, Switzerland. It is possible that the decorative layer comprises fluorescent dyes or organic or inorganic fluorescent pigments in combination with finely divided pigments, especially Mikrolith ® -K. By excitation of these fluorescent pigments, the UV radiation is filtered out for the most part already in the decorative layer, so that only an insignificant fraction of the Radiation reaches the resist layer.
  • the fluorescent pigments can be used in the multilayer body as an additional security feature.
  • a UV-activatable resist layer offers advantages: By using a UV absorber that is transparent in the visual wavelength range in the decorative layer, the "color" property of the decorative layer in the visual wavelength range of desired properties of the decorative layer for patterning the resist layer, e.g. sensitive in the near UV, and thereby the at least one layer to be structured to be separated. In this way, a high contrast between the first and the second area can be achieved, regardless of the visually discernible coloring of the decorative layer.
  • the carrier layer is formed as a single-layer or multi-layer carrier film.
  • a thickness of the carrier film of the multilayer body according to the invention in the range from 12 to 100 ⁇ m has proven itself.
  • PEN polyethylene naphthalate
  • PMMA polymethyl methacrylate
  • Fig. 1a to 14th are each drawn schematically and not to scale to ensure a clear presentation of the essential features.
  • Fig. 8a 1 shows a multilayer body 100 which has a carrier layer 1 with a first side 11 and a second side 12, a functional layer 2 arranged on the first side 11 of the carrier layer 1, a decorative layer 3 arranged on the functional layer 2 with a first region 8 formed first lacquer layer 31, a replication layer 4 adjacent to the decorative layer 3, a structured layer 5 arranged on the replication layer 4 in register with the first lacquer layer 3 and on the replication layer 4 and the structured layer 5 arranged compensation layer 10.
  • the carrier layer 1 is a preferably transparent plastic film having a thickness of between 8 ⁇ m and 125 ⁇ m, preferably in the range of 12 to 50 ⁇ m, more preferably in the range of 16 to 23 ⁇ m.
  • the carrier film 1 can hereby be monoaxially or biaxially stretched.
  • the carrier foil 1 not only to consist of one layer, but also of several layers.
  • the carrier film 1 it is possible for the carrier film 1 to have, in addition to a plastic carrier, for example a plastic film described above, a release layer which makes it possible to detach the layer structure consisting of the layers 2 to 6 and 10 from the plastic film, for example when using the multilayer body 100 as a hot stamping foil
  • the functional layer 2 may comprise a release layer, e.g. of heat-melting material, which facilitates detachment of the carrier film 1 from the layers of the multilayer body 100, which are arranged on a side of the release layer 2 facing away from the carrier film 1.
  • a release layer e.g. of heat-melting material
  • This is particularly advantageous when the multilayer body 100 is formed as a transfer layer, as e.g. is used in a hot stamping process or an IMD process.
  • the functional layer 2 contains, in addition to a release layer, a protective layer, e.g. a protective lacquer layer.
  • the multilayer body 100 may be a section of a transfer film, for example a hot stamping film, which may be disposed on a substrate by means of an adhesive layer.
  • the adhesive layer is preferably arranged on the side of the compensation layer 10 facing away from the carrier film 1.
  • the adhesive layer may be a hot melt adhesive which melts upon thermal exposure and bonds the multi-layer body 100 to the surface of the substrate.
  • a further carrier film may additionally or alternatively be provided on the side of the compensating layer 10 facing away from the carrier film 1.
  • This laminate body which consists of two outer-side carrier films and the inner layers of the multilayer body 100, can be laminated, for example, for further use in card composites, for example from PC.
  • the carrier films made of the same material as those on the Laminate body adjacent layers of the card composite, for example, also made of PC.
  • a transparent, colored lacquer layer 31 is printed in the region 8.
  • Transparent means that the lacquer layer 31 is at least partially transparent to radiation in the visible wavelength range.
  • Colored means that the varnish layer 31 shows a visible color impression with sufficient daylight.
  • Both the areas 8 printed with the lacquer layer 31 and the unprinted areas 9 of the functional layer 2 are covered by a replication layer 4 which equalizes the relief structure of the decorative layer 3, ie the differing levels in the printed 8 and the unprinted areas 9.
  • the replication layer 4 has in a second zone 42 a relief structure which is not present in a first zone 41. In the register and when viewed perpendicular to the plane of the carrier layer 1 congruent to the lacquer layer 31, a thin metal layer 5 is arranged on the replication 4.
  • Both the regions 8 of the replication layer 4 covered by the metal layer 5 and the uncovered regions 9 of the replication layer 4 are covered with a compensation layer 10, the structures caused by the relief structure 42 and the metal layer 5 arranged in regions 8 (eg relief structure 42, different layer thicknesses, Height offset) equalized, ie covered and fills, so that the multi-layer body on the side facing away from the carrier film 1 side of the compensation layer 10 has a flat, substantially featureless surface.
  • the compensation layer 10 has a similar refractive index as the replication layer 4, ie if the difference in refractive index is less than approximately 0.3, the regions of the relief structure 42 in the replication layer 4 which are not directly covered by the metal layer 5 and directly adjoin the compensation layer 10 become optically extinguished because there no longer exist any optically recognizable layer boundaries between the replication layer 4 and the leveling layer 10 because of the similar refractive index of both layers.
  • FIGS. 1a to 7a now show manufacturing stages of in FIG. 8a shown multilayer body 100. Same elements as in FIG. 8a are designated by the same reference numerals.
  • FIG. 1 a shows a first manufacturing stage 100a of the multilayer body 100, in which a functional layer 2 and a decorative layer 3 are arranged on a first side 11 of a carrier film 1.
  • a functional layer 2 adjoins the carrier film 1, its other side adjoins the decorative layer 3.
  • the decorative layer 3 has a first region 8, in which a lacquer layer 31 is formed, and a second region 9, in which the lacquer layer 31 is absent is on.
  • the lacquer layer 31 is printed on the functional layer 2, for example by screen printing, gravure printing or offset printing. Due to the region-wise, ie limited to the first region 8, formation of the lacquer layer 31 results in a pattern-shaped configuration of the decorative layer. 3
  • Figure 1d shows a plan view of the in Fig. 1a
  • the lacquer layer 31 is printed on the entire surface of the carrier film 1 arranged functional layer 2, while the second region 9 of the functional layer 2 not with the lacquer layer 31 printed, that is released.
  • the first region 8 consists of two rectangular areas.
  • the first region 8 provided with the lacquer layer 31 can have any shape, eg alphanumeric characters, symbols, logos, fine-line patterns, eg grid patterns, or ornaments, eg guilloches, geometric, pictorial or figurative patterns.
  • a section plane la is given; when looking at the cutting plane la in the direction indicated by the arrows, the results in FIG. 1 a section shown.
  • Fig. 1b shows an alternative embodiment of a first manufacturing stage of a multilayer body according to the invention.
  • the decorative layer 3 is not formed on the carrier film 1, but in the carrier film 1.
  • the carrier film 1 consists of three layers 1 a, 1 b and 1 c.
  • the two outer layers 1a and 1c are made of PC.
  • the intermediate, middle layer 1 b consists of a plastic material, such as a mixed with additives PC, which shows a color change from a transparent, colorless, first state to a transparent, colored, second state when exposed to laser radiation of a certain energy, ie so-called. laser Black.
  • the plastic material remains in the once reached second state, even after the laser radiation has been removed. This means that the carrier film 1 is at the same time decorative layer and carrier.
  • Fig. 1c shows a further alternative embodiment of a first manufacturing stage of a multilayer body according to the invention.
  • the decorative layer 3 is not formed on the carrier film 1, but in the carrier film 1.
  • the carrier film 1 consists of a plastic material in which dye / color pigments can diffuse.
  • the second surface 12 of the carrier film 1 in the first region 8 was brought into contact with a substance for a certain period of time, from which color pigments can diffuse into the carrier film 1. During this period, a part of these color pigments diffused into the carrier film 1, so that the discolored areas 34 formed with a certain layer thickness. This means that the carrier film 1 is at the same time decorative layer and carrier.
  • FIG. 2 shows a second manufacturing stage 100b of the multi-layer body 100, which consists of the first manufacturing stage 100a in FIG. 1 a is formed by a replication 4 was applied to the functional layer 2 and the region-wise, ie, limited to the first region 8, thereon disposed lacquer layer 31.
  • This can be an organic layer which is applied in liquid form by conventional coating methods, such as printing, casting or spraying.
  • the order of the replication layer 4 is here provided over the entire surface.
  • the layer thickness of the replication layer 4 varies, as it compensates for the different levels of the decorative layer 3 comprising the printed first area 8 and the unprinted second area 9; In the first region 8, the layer thickness of the replication layer 4 is thinner than in the second region 9, so that the side of the replication layer 4 facing away from the carrier layer 1 has a flat, substantially featureless surface before the formation of the relief structure in the second zone 42.
  • an application of the replication layer 4 may also be provided only in a partial region of the multilayer body 100.
  • the surface of the replication layer 4 is patterned by known methods in a second zone 42 while unstructured in a first zone 41.
  • a thermoplastic Replizierlack applied by printing, spraying or painting and molded a relief structure in the second zone 42 in the particular thermally curable / dry replicate 4 by means of a heated punch or a heated replicating roller.
  • the replication layer 4 can also be a UV-curable replication lacquer which is structured, for example, by a replication roller and then cured by means of UV radiation.
  • the structuring can also be produced by UV irradiation through an exposure mask. In this way, the second zone 42 can be molded into the replication layer 4.
  • FIG. 2a shows an alternative second manufacturing stage of a multilayer body, which consists of the in Fig. 1b shown first manufacturing stage is formed by a relief structure 42 is embossed in the first side 11 of the carrier film 1.
  • a relief structure is embossed in the carrier layer 1, but the carrier layer 1 itself does not serve as a decorative layer.
  • FIG. 3 a third manufacturing stage 100c of the multi-layer body 100, which consists of the second manufacturing stage 100b in FIG. 2 is formed by the structuring Layer 5 was applied to the replication layer 4.
  • This layer 5 to be structured may be formed, for example, as a vapor-deposited metal layer, for example of silver or aluminum.
  • the order of the layer to be structured is provided here over the entire area. However, an application may also be provided only in a partial region of the multilayer body 100, for example with the aid of a partially shielding vapor deposition mask.
  • FIG. 4 shows a fourth manufacturing stage 100d of the multi-layer body 100, which from the third manufacturing stage 100c in FIG. 3 is formed by a photoactivatable resist layer 6 has been applied to the layer 5 to be structured.
  • the resist layer 6 may be an organic layer which is applied in a liquid form by classical coating methods such as printing, casting or spraying. It can also be provided that the resist layer 6 is vapor-deposited or laminated as a dry film.
  • the photoactivatable layer 6 may, for example, be a positive photoresist BAZ 1512 or AZ P 4620 from Clariant or S1822 from Shipley, which has an areal density of from 0.1 g / m 2 to 10 g / m 2 , preferably from 0, 1 g / m 2 to 1 g / m 2 is applied to the layer 5 to be structured.
  • the layer thickness depends on the desired resolution and the process. The order is provided here over the entire area. However, an application may also be provided only in a partial area of the multilayer body 100.
  • FIG. 5 shows a fifth manufacturing stage 100d of the multilayer body 100, in which the present after the fourth manufacturing stage 100d multilayer body 100 is irradiated.
  • the irradiation serves to activate the photoactivatable resist layer 6 in the second region 9, in which the decorative layer 3 has a higher transmittance than in the first region 8.
  • the intensity and duration of the exposure to the electromagnetic radiation 7 is matched to the multi-layer body 100e in such a way that the radiation 7 in the second area 9 leads to activation of the photoactivatable resist layer 6, but not into the first area 8 printed with the lacquer layer 31 an activation of the photoactivatable resist layer 6 leads. It has proven useful if the contrast between the first region 8 and the second region 9 caused by the lacquer layer 31 is greater than two. Furthermore, it has proven useful if the lacquer layer 31 are designed so that the radiation 7 after passing through the entire multi-layer body 100e has a ratio of the transmittances, ie a contrast ratio of about 1: 2 between the first region 8 and the second region 9.
  • FIG. 12 shows a "developed" sixth manufacturing stage 100e of the multilayer body 100 that is produced from the fifth manufacturing stage 100d in FIG. 5 is formed by a developer solution, for.
  • a developer solution for.
  • solvents or alkalis in particular a sodium carbonate solution or a sodium hydroxide solution has acted on the side facing away from the carrier film 1 surface of the exposed photoactivatable resist layer 6.
  • the exposed resist layer 6 in the second region 9 has been removed.
  • the resist layer 6 is obtained because the amount of radiation absorbed in these regions has not led to sufficient activation.
  • the resist layer 6 thus formed of a positive photoresist.
  • the more exposed areas 9 are soluble in the developing solution, eg, the solvent.
  • the unexposed and less exposed portions 8 are soluble in the developing solution, as described later in FIG FIG. 9 illustrated embodiment.
  • FIG. 7 shows a seventh manufacturing stage 100f of the multi-layer body 100, which from the sixth manufacturing stage 100e in FIG. 6 is formed by the layer to be structured 5 has been removed in the second region 9 by an etchant.
  • the etchant may be, for example, an acid or alkali. In this way, the in FIG. 7 shown areas of the structured layer 5 is formed.
  • the resist of the resist layer 6 is generally poorly chemically stable because it must be vulnerable to attack by the developer solution in the present process. Therefore, if the remaining portions of the resist layer 6 were left on the multi-layer body, it would be possible for the remaining portions of the resist layer 6 to weaken the stability and durability of the security element, eg, counterfeiting the multilayer body using solvents or acids or alkalis , By completely removing the resist layer 6, therefore, this disadvantage is avoided.
  • conventional methods for producing an etching mask by means of mask exposure wherein the mask is present either as a separate unit, for example as a separate film or as a separate glass plate / glass roller, or as a subsequently printed layer
  • the problem arises that by previous, in particular thermal and / or mechanically straining process steps, eg when generating the replication structure 42 in the replication layer 4, caused linear and / or non-linear distortions in the multi-layer body 100 can not be fully compensated over the entire surface of the multi-layer body 100, although the mask alignment on existing, preferably on the horizontal and / or vertical edges of the multilayer body arranged register or registration marks takes place.
  • the tolerance fluctuates over the entire surface of the multi-layer body 100 in a relatively large area.
  • the first and second regions 8 and 9 defined by the lacquer layer 31 are used as a mask, wherein the lacquer layer 31 is applied in an early process step in the production of the multilayer body 100 as described above.
  • the lacquer layer 31 is applied in an early process step in the production of the multilayer body 100 as described above.
  • the tolerances or registration accuracies in the method according to the invention lie only in the not absolutely exact course of the color edge of the first and second regions 8 and 9 defined by the lacquer layer 31, the quality of which is determined by the respectively applied printing method, and are approximately in the micrometer range, and thus far below the resolution of the eye; ie the unarmed human eye can no longer perceive existing tolerances.
  • the in FIG. 8a shown multilayer body 100 is made of the in Figure 7a illustrated manufacturing stage 100g of the multilayer body 100 formed by a compensation layer 10 is applied to the arranged in the first region 8, exposed structured layer 5 and on the second region 9 arranged by removing the layer to be patterned layer 5 and the photoresist layer 6 exposed replication 4.
  • the order of the leveling layer 10 is provided here over the entire surface.
  • the leveling layer 10 it is possible for the leveling layer 10 to be applied in each of the first area 8 and the second area 9 in a different layer thickness, e.g. by doctoring, printing or spraying, so that the leveling layer 10 has a flat, substantially featureless surface on its side facing away from the carrier layer 1 side.
  • the layer thickness of the compensation layer 10 varies, since it compensates for the different levels of the structured layer 5 arranged in the first region 8 and the replication layer 4 exposed in the second region 9. In the second region 9, the layer thickness of the compensation layer 10 is greater than the layer thickness of the structured layer 5 in the first region 8, so that the side facing away from the carrier layer 1 side of the compensation layer 10 has a flat surface.
  • an application of the compensating layer 10 may also be provided only in a partial region of the multilayer body 100. It is possible for one or more further layers, e.g. an adhesive or adhesive layer. It is also possible in an advantageous manner for the adhesion or adhesive layer to assume the level-compensating effect of the compensation layer 10, so that no separate compensation layer 10 is necessary.
  • Fig. 8b shows an alternative embodiment of the in Fig. 8a shown multilayer body 100, which consists of the in Figure 7a represented manufacturing stage 100f of the multilayer body 100 is formed by a compensation layer 10 on the remaining areas in the first region 8 of the resist layer 6 and on the arranged in the second region 9, by removing the structuring layer 5 and the photoresist layer 6 exposed replication layer 4 is applied.
  • the multilayer body 100 shown comprises the in Fig. 8b shown multi-layer body thus the preserved areas of the resist layer. 6
  • FIG. 9 shows an alternative embodiment of the invention multi-layer body 100 ', in which, in contrast to the in FIG. 8 illustrated multilayer body 100, instead of a positive resist layer 6, a negative resist layer 6 has been used.
  • the structured layer 5 and the resist layer 6 are not arranged like the lacquer layer 31 in the first region 8, but in the second region 9.
  • the structured layer 5 and the resist layer 6 of the alternative multilayer body 100 ' are similar to those in FIG FIG. 8 shown multilayer body 100 in register with the range limits of the areas 8, 9 of the lacquer layer 31 is arranged, but not congruent to the lacquer layer 31, but in the unprinted spaces 9 of the lacquer layer 31st
  • FIG. 10 shows a multi-layer body 100 ", in which the decorative layer 3 consists of a partially formed lacquer layer 31, which is arranged on the second side 12 of the carrier film 1, wherein the second side 12 of the first side 11 of the carrier film 1, on which the structured layer. 5 is disposed opposite.
  • Fig. 11a to Fig. 11g Each shows a carrier film 1 with a bottom and a top, on which a decorative layer 3 comprising a first region 8 and / or a second region 9 is arranged in different arrangements.
  • the top may be either the first or the second side of the multi-layer body according to the invention.
  • first lacquer layer and a “second lacquer layer”
  • first lacquer layer two differently formed paint layers, for example, with different optical properties such as color and / or different mechanical properties such as modulus of elasticity, with different transmittance is.
  • Two first coating layers which are explicitly described as having a different layer thickness, also have a different degree of transmission. If it is not explicitly described that two layer elements of a first lacquer layer have a different layer thickness, it should be assumed that they are the same thickness and have the same transmittance.
  • Fig. 11a shows the already in Fig. 10 illustrated variant in which the decorative layer 3 consists of a first region 8 on the top of the carrier film 1 arranged first lacquer layer 31, which is not present in the second region 9.
  • Fig. 11b shows a variant in which the decorative layer 3 consists of a full surface on the top of the carrier film 1 arranged first resist layer 31, which has a greater thickness in the first region 8 than in the second region.
  • Fig. 11c shows a variant in which the decorative layer 3 consists of a in the first region 8 on the upper side of the carrier film 1 arranged first resist layer 31 and a second region 9 also on the upper side of the support film 1 arranged second resist layer 32.
  • the lacquer layers 31 and 32 may be, for example, two different colored lacquer layers or two lacquer layers each with different optical effects.
  • Fig. 11d shows a variant in which the decorative layer 3 consists of a arranged in the first region 8 first lacquer layer 31, which is not present in the second region 9.
  • the first lacquer layer comprises two layer elements, wherein a first layer element is arranged on the upper side of the carrier foil 1 and a second layer element is arranged on the underside of the carrier foil 1.
  • Fig. 11e 1 shows a variant in which the decorative layer 3 comprises a first lacquer layer 31 with a first thickness arranged in the first region 8 on the upper side of the carrier foil 1 and a first lacquer layer 31 with a second thickness arranged in the second region 9 on the underside of the carrier foil 1, which is less than the first thickness.
  • Fig. 11f shows a variant in which the decorative layer 3 consists of a in the first region 8 on the top of the carrier film 1 arranged first resist layer 31 and a second region 9 on the underside of the support film 1 arranged second resist layer 32.
  • Fig. 11g shows a variant in which the decorative layer 3 consists of a in the first region 8 on the top of the carrier film 1 arranged first lacquer layer 31 and a full surface on the underside of the carrier film 1 arranged second lacquer layer 32.
  • FIG. 12 shows a multi-layer body 100 ''', in which the decorative layer 3 by a first lacquer layer 31, which produces a first color impression, and a second lacquer layer 32, which produces a second color impression is formed, wherein both lacquer layers 31, 32 on the same side of Carrier layer 1 between the functional layer 2 and the replication layer 4 are arranged.
  • FIG. 13 shows a multi-layer body 10pa ', in which the decorative layer 3 is formed of a first partially applied lacquer layer 31 and a second over the entire surface applied lacquer layer 32, wherein both lacquer layers 31, 32 are arranged on the same side of the support layer 1.
  • FIG. 14 shows a multi-layer body 100a ", in which the decorative layer 3 of a first lacquer layer 31, which is applied over the entire surface on the second side 12 of the carrier film 1, and a second lacquer layer 32, which is partially applied on the first side 11 of the carrier film 1 consists ,
  • FIG. 15 shows transmission spectra of four different classes of UV absorbers, which may be present in the first region 8 of the decorative layer 3, to form a different transmittance in the first region 8 and in the second region 9.
  • the UV absorbers are present in chloroform at a concentration of 0.00014 mol / l. Plotted is the percentage of transmission measured% T over the wavelength ⁇ in the range of 280 to 410 nm.
  • the dash-dot line A indicates the transmission of oxalanilide
  • the dash-dot-dot line B the transmission of hydroxybenzophenone
  • the dash -Strich line C the transmission of hydroxyphenyl-S-triazine
  • the solid line D the transmission of benzotriazole again.

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Claims (15)

  1. Procédé servant à fabriquer un corps multicouche (100), sachant
    a) qu'une strate décorative (3) mono- ou multicouche pourvue d'une première zone (8) et d'une deuxième zone (9) est réalisée sur et/ou dans une strate de support (1) pourvue d'une première face (11) et d'une deuxième face (12), sachant que la strate décorative (3) présente, vue de manière perpendiculaire par rapport au plan de la strate de support (1), dans la première zone (8), un premier degré de transmission, et, dans la deuxième zone (9), un deuxième degré de transmission plus grand par rapport au premier degré de transmission, sachant que lesdits degrés de transmission se rapportent à un rayonnement (7) électromagnétique présentant une longueur d'onde adaptée à la photoactivation,
    caractérisé en ce
    b) qu'au moins une couche (5) à structurer est disposée sur la première face (11) de la strate de support (1),
    c) en ce qu'une couche de réserve (6) photoactivable au moyen dudit rayonnement (7) électromagnétique est disposée sur la première face (11) de la strate de support (1) de sorte que la couche de réserve (6) est disposée sur la face, opposée à la strate de support (1), de la couche (5) à structurer au moins au nombre de une et que la strate décorative (3) est disposée sur l'autre face de la couche (5) à structurer au moins au nombre de une,
    d) en ce que la couche de réserve (6) est exposée depuis la deuxième face (12) de la strate de support (1) audit rayonnement (7) électromagnétique, sachant que la strate décorative (3) fait office, du fait de la réalisation de la première zone (8) et de la deuxième zone (9), de masque d'exposition, et
    e) en ce que la couche (5) à structurer au moins au nombre de une et la couche de réserve (6) sont structurées avec une précision d'adaptation l'une par rapport à l'autre au moyen de processus synchronisés les uns par rapport aux autres conférant une structure.
  2. Procédé selon la revendication 1,
    caractérisé en ce
    que la strate décorative (3) comprend une première couche de vernis (31), qui est disposée sur la strate de support (1) dans la première zone (8) avec une première épaisseur de couche et dans la deuxième zone (9) sans ou avec une deuxième épaisseur de couche inférieure par rapport à la première épaisseur de couche de sorte que la strate décorative (3) présente, dans la première zone (8), ledit premier degré de transmission et, dans la deuxième zone (9), ledit deuxième degré de transmission, et/ou en ce que la strate décorative (3) comprend une première coloration (33, 34) de la strate de support (1), qui est réalisée dans la première zone (8) avec une première épaisseur de couche et, dans la deuxième zone (9) sans ou avec une deuxième épaisseur de couche inférieure par rapport à la première épaisseur de couche de sorte que la strate décorative (3) présente, dans la première zone (8), ledit premier degré de transmission et, dans la deuxième zone (9), ledit deuxième degré de transmission.
  3. Procédé selon l'une quelconque des revendications précédentes,
    caractérisé en ce
    que l'épaisseur de couche et le matériau de la strate décorative (3) sont choisis de telle sorte que le premier degré de transmission est supérieur à zéro, et/ou en ce que l'épaisseur et le matériau de la strate décorative (3) sont choisis de telle sorte que le rapport entre le deuxième degré de transmission et le premier degré de transmission est supérieur à deux.
  4. Procédé selon l'une quelconque des revendications précédentes,
    caractérisé en ce
    qu'au moins une structure en relief (42) est réalisée sur la première face (11) de la strate de support (1), et
    en ce que la couche (5) à structurer au moins au nombre de une est disposée sur la surface (40) de la structure en relief (42) au moins au nombre de une, sachant de manière préférée que soit
    a) une couche de réplication (4) est disposée sur la première face (11) de la strate de support (1) et
    la structure en relief (42) au moins au nombre de une est imprimée dans une surface (40), détournée à la strate de support (1), de la couche de réplication (4),
    soit
    b) la structure en relief (42) au moins au nombre de une est imprimée dans la strate de support (1),
    et sachant de manière particulièrement préférée que la structure en relief (42) au moins au nombre de une est disposée au moins en partie dans la première zone (8) et/ou dans la deuxième zone (9).
  5. Procédé selon l'une quelconque des revendications précédentes,
    caractérisé en ce
    qu'une couche de compensation (10) est appliquée sur la première face (11) de la strate de support (1) après l'étape e), et/ou en ce qu'au moins une couche de la strate décorative (3) est appliquée sur la deuxième face (12) de la strate de support (1), sachant que de manière préférée la couche au moins au nombre de une, appliquée sur la deuxième face (12) de la strate de support (1), de la strate décorative (3) est retirée de la strate de support (1) après l'étape d'exposition d).
  6. Procédé selon l'une quelconque des revendications précédentes,
    caractérisé en ce
    qu'un matériau photorésistant positif, dont la solubilité augmente dans le cas d'une activation par l'exposition, ou un matériau photorésistant négatif, dont la solubilité diminue dans le cas d'une activation par l'exposition est utilisé afin de réaliser la couche (6) photoactivable, et
    en ce que la couche de réserve (6) est retirée dans le cas de l'utilisation d'un matériau photorésistant positif dans la deuxième zone (9) et dans le cas de l'utilisation d'un matériau photorésistant négatif dans la première zone (8), de préférence par un solvant, et sachant que de manière préférée la couche (5) à structurer est retirée dans la première ou la deuxième zone (8, 9), dans laquelle la couche de réserve (6) a été retirée, en particulier de préférence par un agent décapant.
  7. Corps multicouche (100) comprenant une strate de support (1), qui présente une première face (11) et une deuxième face (12), et une strate décorative (3) mono- ou multicouche réalisée sur et/ou dans la strate de support (1), laquelle strate décorative présente une première zone (8) et une deuxième zone (9), sachant que la strate décorative (3) présente, vue de manière perpendiculaire par rapport au plan de la strate de support (1), dans la première zone (8) un premier degré de transmission et, dans la deuxième zone (9), un deuxième degré de transmission plus grand par rapport au premier degré de transmission, sachant que lesdits degrés de transmission se rapportent à un rayonnement (7) électromagnétique présentant une longueur d'onde adaptée à une photoactivation,
    caractérisé en ce
    que le corps multicouche (100) présente en outre au moins une couche structurée (5) dans le registre par rapport à la première zone (8) et à la deuxième zone (9).
  8. Corps multicouche (100) selon la revendication 7,
    caractérisé en ce
    que le corps multicouche (100) présente, dans la première zone (8) ou dans la deuxième zone (9), une couche de réserve (6) pouvant être photoactivée au moyen dudit rayonnement électromagnétique, sachant que la couche (5) structurée au moins au nombre de une et la couche de réserve (6) sont disposées de manière orientée de manière à s'adapter avec précision l'une à l'autre de telle sorte sur la première face de la strate de support (1) que la couche de réserve (6) est disposée sur la face, opposée à la strate de support (1), de la couche (5) structurée au moins au nombre de une et que la strate décorative (3) est disposée sur l'autre face de la couche (5) structurée au moins au nombre de une, et/ou en ce que la strate décorative (3) comprend une première couche de vernis (31), qui est disposée sur la strate de support (1) dans la première zone (8) avec une première épaisseur de couche et dans la deuxième zone (9) sans ou avec une deuxième épaisseur de couche inférieure par rapport à la première épaisseur de couche de sorte que la strate décorative (3) présente, dans la première zone (8), ledit premier degré de transmission et, dans la deuxième zone (9), ledit deuxième degré de transmission, et/ou en ce que la strate décorative (3) comprend une première coloration (33, 34) de la strate de support (1), qui est réalisée dans la première zone (8) avec une première épaisseur de couche et, dans la deuxième zone (9) sans ou avec une deuxième épaisseur de couche inférieure par rapport à la première épaisseur de couche, de sorte que la strate décorative (3) présente, dans la première zone (8), ledit premier degré de transmission et, dans la deuxième zone (9), ledit deuxième degré de transmission, et/ou en ce que la strate décorative (3) est perméable au moins en partie à la lumière visible présentant une longueur d'onde comprise dans une plage allant d'environ 380 à 750 nm, et/ou en ce que la strate décorative (3) est colorée avec au moins un colorant opaque et/ou avec au moins un colorant transparent, qui présente une couleur ou produit un effet coloré au moins dans une plage de longueurs d'onde du spectre électromagnétique, en particulier qui est multicolore ou produit un effet multicolore, en particulier en ce qu'un colorant est contenu dans la strate décorative (3), qui peut être excitée en dehors du spectre visible et qui produit un effet coloré identifiable visuellement, et/ou en ce que la strate décorative (3) est colorée à l'aide au moins d'un colorant de la couleur jaune, magenta, cyan ou noir (CMYK) ou de la couleur rouge, vert ou bleu (RGB) et/ou est pourvue au moins d'un pigment ou d'une substance colorante pouvant être excité(e) par un rayonnement à fluorescence rouge et/ou verte et/ou bleue et qui produit de ce fait une couleur additionnelle lors de l'exposition au rayonnement.
  9. Corps multicouche (100) selon l'une quelconque des revendications 7 ou 8,
    caractérisé en ce
    que le premier degré de transmission est supérieur à zéro, et/ou en ce que le rapport entre le deuxième degré de transmission et le premier degré de transmission est supérieur à deux.
  10. Corps multicouche (100) selon l'une quelconque des revendications 7 à 9,
    caractérisé en ce
    qu'au moins une structure en relief (42) est réalisée sur la première face (11) de la strate de support (1), et en ce que la couche (5) à structurer au moins au nombre de une est disposée sur la surface (40) de la structure en relief (42) au moins au nombre de une, sachant de manière préférée que soit
    a) une couche de réplication (4) est disposée sur la première face (11) de la strate de support (1) et la structure en relief (42) au moins au nombre de une est imprimée dans une surface (40), détournée de la strate de support (1), de la couche de réplication (4),
    ou que
    b) la structure en relief (42) au moins au nombre de une est imprimée dans la strate de support (1),
    et sachant de manière particulièrement préférée que la structure en relief (42) au moins au nombre de une est disposée au moins en partie dans la première zone (8) et/ou dans la deuxième zone (9).
  11. Corps multicouche (100) selon l'une quelconque des revendications 7 à 10,
    caractérisé en ce
    qu'une couche de compensation (10) est disposée sur la face, opposée à la strate de support (1), de la couche (5) structurée au moins au nombre de une, sachant de manière préférée que la couche de compensation (10) est réalisée sous la forme d'une couche d'adhésion et/ou sachant de manière préférée qu'au moins une structure en relief (42) est réalisée sur la première face (11) de la strate de support (1) et que la couche (5) à structurer au moins au nombre de une est disposée sur la surface (40) de la structure en relief (42) au moins au nombre de une, qu'une couche de réplication (4) est disposée sur la première face (11) de la structure de support (1) et que la structure en relief (42) au moins au nombre de une est imprimée dans une surface (40), détournée de la strate de support (1), de la couche de réplication (4) et que l'indice de réfraction de la couche de compensation (10) est compris dans la plage de longueurs d'onde visible dans la plage allant de 90 % à 110 % de l'indice de réfraction de la couche de réplication (4).
  12. Corps multicouche (100) selon l'une quelconque des revendications 7 à 11,
    caractérisé en ce
    qu'au moins une couche de la strate décorative (3) est disposée sur la deuxième face (12) de la strate de support (1), et/ou en ce que la strate décorative (3) comprend au moins deux couches de vernis (31, 32) provoquant divers effets de couleur, et/ou en ce que la strate décorative (3) comprend une première couche de vernis (31), qui est appliquée seulement par endroits sur la strate de support (1), et une deuxième couche de vernis (32), qui est appliquée sur toute la surface de la strate de support (1), et/ou en ce que la couche (5) structurée au moins au nombre de une comprend une ou plusieurs des couches qui suivent : une couche métallique, une couche hautement réfringente, une couche à cristaux liquides, une couche polymère, une couche à film mince, une couche à pigments, une couche semi-conductrice.
  13. Corps multicouche (100) selon l'une quelconque des revendications 7 à 12,
    caractérisé en ce
    que la couche (5) structurée au moins au nombre de une présente une épaisseur comprise dans la plage allant de 20 à 1000 nm, en particulier allant de 20 à 100 nm, et/ou en ce que la strate décorative (3) présente une épaisseur comprise dans la plage allant de 0,5 à 5 µm, et/ou en ce que la couche de réserve (6) présente une épaisseur comprise dans la plage allant de 0,3 à 3 µm.
  14. Corps multicouche (100) selon l'une quelconque des revendications 7 à 13,
    caractérisé en ce
    que la strate décorative (3) présente des pigments hautement dispersés, en particulier une dispersion de pigments K Microlith®, et/ou en ce que la strate décorative (3) présente des absorbeurs inorganiques présentant une fraction de diffusion élevée, en particulier des absorbeurs d'UV à l'échelle nanométrique à base d'oxydes inorganiques, et/ou en ce que la strate décorative (3) présente des absorbeurs organiques, en particulier des dérivés de benzotriazole, présentant une fraction massique comprise dans une plage allant d'env. 3 % à 5 %, et/ou en ce que la strate décorative (3) présente des pigments organiques ou inorganiques à fluorescence en combinaison avec des pigments hautement dispersés, en particulier des pigments K-Microlith®.
  15. Corps multicouche (100) selon l'une quelconque des revendications 7 à 14,
    caractérisé en ce
    que la strate de support (1) est réalisée sous la forme d'un film de support mono- ou multicouche ; et/ou en ce qu'au moins une couche fonctionnelle (2), en particulier une couche de séparation et/ou une couche de vernis de protection, est disposée entre la strate de support (1) et la couche (5) à structurer au moins au nombre de une, de préférence directement sur la première face de la strate de support (1).
EP10732309.9A 2009-07-17 2010-07-13 Procédé de fabrication d'un corps multicouche et corps multicouche Active EP2454100B1 (fr)

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WO2011006634A2 (fr) 2011-01-20
US9694618B2 (en) 2017-07-04
RU2012105537A (ru) 2013-08-27
US8691493B2 (en) 2014-04-08
CN102574411A (zh) 2012-07-11
AU2010272811A1 (en) 2012-02-02
EP2454100A2 (fr) 2012-05-23
JP5811484B2 (ja) 2015-11-11
MX2012000781A (es) 2012-02-13
JP2012533760A (ja) 2012-12-27
PL2454100T3 (pl) 2016-09-30
DE102009033762A1 (de) 2011-01-27
US20140227488A1 (en) 2014-08-14
AU2010272811B2 (en) 2014-10-23
ES2576788T3 (es) 2016-07-11
US20120156446A1 (en) 2012-06-21
WO2011006634A3 (fr) 2011-05-26
RU2540056C2 (ru) 2015-01-27

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