EP3274183A1 - Corps multicouche et procédé de fabrication - Google Patents

Corps multicouche et procédé de fabrication

Info

Publication number
EP3274183A1
EP3274183A1 EP16711791.0A EP16711791A EP3274183A1 EP 3274183 A1 EP3274183 A1 EP 3274183A1 EP 16711791 A EP16711791 A EP 16711791A EP 3274183 A1 EP3274183 A1 EP 3274183A1
Authority
EP
European Patent Office
Prior art keywords
layer
printing
μιτι
print
multilayer body
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.)
Granted
Application number
EP16711791.0A
Other languages
German (de)
English (en)
Other versions
EP3274183B1 (fr
Inventor
Ludwig Brehm
Klaus PFORTE
Patrick KRÄMER
Karin FÖRSTER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Leonhard Kurz Stiftung and Co KG
Original Assignee
Leonhard Kurz Stiftung 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 Leonhard Kurz Stiftung and Co KG filed Critical Leonhard Kurz Stiftung and Co KG
Publication of EP3274183A1 publication Critical patent/EP3274183A1/fr
Application granted granted Critical
Publication of EP3274183B1 publication Critical patent/EP3274183B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/324—Reliefs
    • 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
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
    • 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
    • B42D25/328—Diffraction gratings; Holograms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/337—Guilloche patterns
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/364—Liquid crystals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/373—Metallic materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/378—Special inks
    • B42D25/387—Special inks absorbing or reflecting ultraviolet light
    • 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
    • B42D25/415—Marking using chemicals
    • 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
    • B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
    • B42D25/23—Identity cards
    • 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
    • B42D25/24—Passports

Definitions

  • the invention relates to a method for producing a multilayer body, a multi-layer body obtainable in this way and a security document having such a multilayer body.
  • a known method for this is the iris printing, in which different colors are applied side by side on a common inking roller of a printing press. When printing these mix
  • a very fine structuring of a multi-color image with each other exactly in the register standing parts of the motif is generally hardly possible with conventional printing, because the register accuracy and edge sharpness are not sufficient.
  • multicolored fine lines are so hard to produce.
  • fine screened motifs on a gravure roll dry very quickly due to the very small amount of ink required and are therefore very difficult to print.
  • Register accuracy is a positional accuracy of two or more elements and / or layers to understand each other. It should be the
  • the positionally accurate positioning can in particular by means of optically detectable registration marks or
  • Register marks take place. These register marks or register marks can either represent special separate elements or regions or layers or themselves be part of the elements or regions or layers to be positioned. From a "perfect register" one speaks, if the
  • the object of the present invention is to provide an improved method for producing a multilayer body with fine line patterns, such a multilayer body and a security document having such a multilayer body
  • Such a method for producing a multilayer body comprises the steps of: a) providing a first printing layer;
  • Print layer as a mask.
  • Printing layer wherein the first printing layer is patterned using the second printing layer as a mask.
  • Such a multilayer body can be found in a security document, in particular a banknote, a security, an identification document, a visa document, a passport or a credit card
  • the first printing layer can be applied in particular flat. It is thus possible without the initially described problems when printing multicolored fine lines a multicolored motif, for example with
  • the second print layer merely serves as a mask, ie as a protective layer for the structuring of the first print layer. Therefore, the second printing layer can be applied monochrome. In this way, fine line patterns can be generated in the second printing layer, without the initially described problems when printing multicolored fine lines occur.
  • the second print layer as a mask removes the areas of the first print layer that are not covered by the second print layer.
  • the second print layer thus covers all areas of the first
  • Pressure layer but can also extend beyond this.
  • multi-colored line structures can be produced in a reproducible manner.
  • a first lacquer is used, which with a second lacquer used for applying the second printed layer, a chemical reaction,
  • the first lacquer where the second printing layer is applied, can be changed by reaction with the second lacquer in particular to become resistant to chemical substances used for structuring the first printing layer, such as, for example, etching or solvent.
  • the first lacquer is preferably an aqueous-based or solvent-based lacquer soluble in alkali.
  • the paint of polyacrylic acid consist.
  • Such a varnish can be removed from its substrate by treatment with an alkaline etchant. This allows the desired structuring of the first print layer using the second print layer as a mask.
  • first lacquer colorants in particular colorful or achromatic pigments and / or effect pigments, UV-excitable
  • UV ultraviolet (radiation / light)
  • the first lacquer comprises a plurality of such colorants which form color gradients, gradients, true color images or the like.
  • the second paint is a PVC copolymer of vinyl chloride, vinyl acetate and dicarboxylic acid.
  • a lacquer is resistant to alkaline etchants and can therefore serve as a protective lacquer or mask for structuring the first print layer with such an etchant.
  • the second varnish may also be a polyester varnish with cellulose propionate.
  • a lacquer also has the desired alkali resistance and can therefore be used as a protective lacquer.
  • the second varnish is a cross-linker
  • polyisocyanate in particular polyisocyanate and / or polyaziridine.
  • Crosslinkers can carboxylic acid or hydroxyl groups of the two paints be cross-linked, so that the first and second print layer form a stable chemical compound.
  • the cross linking makes the two
  • the first printing layer by the action of an alkaline etchant, in particular of alkali metal hydroxide (NaOH) or
  • Alkali carbonate Na 2 COs
  • Print layer is protected, dissolved and removed, so that the desired structuring results.
  • the alkaline etchant is used in a concentration of 0.5% to 3%, and / or at a temperature of 20 ° C to 50 ° C, and / or for a period of 0.5s to 5s , This allows a complete and sharp removal of the first print layer in the
  • the etching process may be promoted by agitating the etchant, targeting the first print layer with the etchant, sonicating, brushing, and / or wiping.
  • the first printing layer is preferably applied in multiple colors, in particular in the form of a color gradient, color gradients or as a true color image.
  • the desired motif then remains in the form of multicolored fine lines congruent to the second printing layer.
  • the first printing layer in the form of a grid, in particular a line grid with 60 lines / cm to 120 lines / cm and / or a
  • Line depth of 15 ⁇ applied to 45 ⁇ refers to the depth of the introduced on a pressure roller, in particular on a gravure roll structures for receiving the ink.
  • the first printing layer in the form of a grid in particular a cross-diagonal grid with a screen width of 40 cells / cm to 100 cells / cm and / or a depth of 15 ⁇ to 45 ⁇ be applied.
  • the first and / or second printing layer can be applied by gravure printing.
  • gravure in particular, the above-mentioned grid can be realized.
  • the first and / or second print layer can be applied by screen printing, in particular with a screen thickness of 90T to 140T or 90S to 140S.
  • Both gravure printing and screen printing can be realized with a minimum spot size of 75 ⁇ and a minimum point spacing of 10 ⁇ grid.
  • a minimum line thickness of 80 ⁇ at a minimum line spacing of 100 ⁇ can be achieved. In all cases is the achievable register tolerance both within a grid and between the first and second printing layer in about 200 ⁇ .
  • the second printing layer in the form of a
  • the second print layer defines the final shape of the printed motif, while the first print layer defines only the color. It is further preferred if the first printing layer is applied to a layer composite comprising one or more of the following layers: a carrier layer, a replication layer having a surface relief, a
  • Reflection layer a protective layer, a volume hologram layer.
  • a layer composite comprising one or more of the following layers can also be applied to the first and / or second printing layer: a carrier layer, a replication layer with a
  • a height compensation layer in particular of a lacquer of a combination of butyl acrylate and PMMA with a layer thickness of 0.5 ⁇ m to 3 ⁇ m on the first and / or second printing layer is applied.
  • This is particularly useful if further layers of the layer composite are applied to the first and / or second printing layer.
  • the mechanically relatively flexible height compensation layer leveled thereby gradations, which are formed in the patterning of the first printing layer, thus providing a smooth surface ready, to which the other layers can be applied clean.
  • At least one layer of the layer composite is patterned using the second printing layer as a mask.
  • a further motif can be formed in register with the second printing layer. This makes it possible, for example, that the motif formed by the second printing layer can be viewed from different sides of the page
  • Multilayer body has a different appearance.
  • the patterned using the second printing layer as a mask at least one layer of
  • Layer composite is a metal layer. This is particularly useful when the first print layer contains UV-fluorescent colorants.
  • a register layer formed to the printed layers metal layer amplifies the optical
  • Photoresist layer is applied to the metal layer, exposed from the side of the second printing layer ago and when developing in the exposed
  • Metal layer can be structured.
  • the use of an external mask is not necessary. It is preferred that after developing the photoresist
  • Metal layer is patterned by etching.
  • the metal layer itself is structured in the perfect register to the printed layers.
  • the first and / or second printing layer comprises a UV blocker which absorbs UV light in a wavelength range in which the photoresist layer is exposed. This improves the effect of the print layers as a mask for the exposure of the photoresist layer.
  • the UV blocker may also be UV fluorescent pigments provided for the optical effect of the printing layer.
  • the layer composite at least one
  • Coating layer comprising a UV blocker. This is particularly advantageous when the first printing layer contains UV-fluorescent colorants. Where the lacquer layer with the UV blocker is present, no UV light reaches the first printed layer, so that a non-fluorescent motif recognizable under UV light can be formed in this way.
  • the lacquer layer with the UV blocker in the form of a graphic motif, alphanumeric character, logo, image, pattern, in particular Guillochen pattern, applied.
  • a motif may, for example, supplement or superimpose a motif formed by the first and second printing layers.
  • the first and second printing layers are chemically crosslinked with each other. This gives the first print layer the necessary chemical stability, the
  • Structuring for example by etching, allows.
  • the first and / or second printing layer has a layer thickness of 1 ⁇ m to 3 ⁇ m.
  • the multilayer body preferably comprises a replication layer with a surface relief.
  • the surface relief introduced into the replication layer is an optically variable element, in particular a hologram, Kinegram® or Trustseal®, a preferably linear or crossed sinusoidal diffraction grating, a linear or crossed single or multi-level rectangular lattice
  • Zero-order diffraction structure an asymmetric relief structure, a blazed grating, a preferably isotropic or anisotropic matt structure, or a diffractive and / or refractive and / or light-focusing micro or nanostructure, a binary or continuous Fresnel lens, a binary or continuous Fresnel freeform surface , one
  • Microprism structure or a combination structure formed therefrom are examples of Microprism structure or a combination structure formed therefrom.
  • the multi-layer body comprises a wax layer and / or a release layer.
  • a wax layer especially if it is partially applied, can provide additional protection against tampering. For example, a forger tries to solve the layer composite, so allows the wax layer to partially detach the adjacent layers from each other. Where the wax layer is not present, the layers adhere to each other, so that in such an attempt, the layer composite is destroyed.
  • a wax layer can also serve as a release layer, which enables a detachment of a part of the layer composite from a carrier layer.
  • the release layer can also consist of a strongly filming acrylate and / or also be part of the protective lacquer layer.
  • a layer thickness of the replication layer and / or the release layer 1 is ⁇ to 5 ⁇ , preferably 1 ⁇ to 3 ⁇ .
  • the multi-layer body has a removable carrier layer, in particular of PET (polyethylene terephthalate), PEN
  • Such a carrier layer protects and stabilizes the multilayer body during its production and further processing and can be removed during the attachment of the multilayer body on a security document.
  • the multi-layer body comprises at least partial
  • Metal layer in particular of aluminum, copper, chromium, silver and / or gold or of alloys of the aforesaid metals, having a
  • Layer thickness of 5 nm to 100 nm, preferably from 10 nm to 50 nm.
  • a metal layer may on the one hand form a visually appealing motif, but on the other hand serve as a reflection layer to enhance the visual impression of an optically variable element.
  • the Reflection layer is applied in particular directly to the surface relief of the replication, in particular vapor-deposited.
  • the multi-layer body comprises a particularly transparent protective lacquer layer, in particular of PVC, polyester, acrylate, nitrocellulose, cellulose acetobutyrate or mixtures thereof, with a layer thickness of 0.5 ⁇ m to 10 ⁇ m, preferably from 2 ⁇ m to 5 ⁇ m.
  • a protective lacquer layer preferably forms an outer surface of the
  • Multi-layer body and protects it from environmental influences, scratching and the like.
  • Fig. 1 A first intermediate in the production of a
  • Fig. 2 shows a second intermediate in the production of a
  • Fig. 3 shows an embodiment of a multilayer body in
  • Fig. 4 is a schematic plan view of a first printing layer of a
  • FIG. 5 is a schematic plan view of a first and second
  • Fig. 6 is a schematic plan view of a first and second
  • FIG. 7 shows a schematic plan view of a first printing layer of a further exemplary embodiment of a multilayer body before structuring;
  • Fig. 8 is a schematic plan view of a first and second
  • Fig. 9 is a schematic plan view of a first and second
  • a layer composite 11 which comprises a carrier layer 11, a release layer 11, a protective layer 11, a replication layer 11, a reflection layer 11 and a further protective layer 1 16 includes.
  • the carrier layer 1 1 1 is removable from the layer composite 1 1 and consists in particular of PET (polyethylene terephthalate) with a layer thickness of 6 ⁇ to 50 ⁇ , preferably from 12 ⁇ to 50 ⁇ .
  • PET polyethylene terephthalate
  • the carrier layer 1 1 1 protects and stabilizes the multilayer body 1 in its manufacture and further processing and can in the attachment of the
  • the release layer 1 12 allows a detachment of the carrier layer 1 1 1 from the rest of the layer composite 1 1 and consists for example of a wax with a layer thickness of 50 nm to 500 nm, preferably 70 nm to 150 nm
  • Removal layer may alternatively consist of a strong filming acrylate and / or also be part of the protective lacquer layer with a layer thickness of 1 ⁇ to 5 ⁇ , preferably 1 ⁇ to 3 ⁇ .
  • the protective layers 1 13 and 1 16 form protective surfaces of the
  • Layer composite 1 1 and are preferably made of a clear paint, such as a UV-curing paint, PVC, polyester or acrylate, with a layer thickness of 0.5 ⁇ to 10 ⁇ , preferably 1 ⁇ to 5 ⁇ .
  • the replication layer 14 preferably consists of an acrylate with a
  • Layer thickness of 1 ⁇ to 5 ⁇ , preferably from 1 ⁇ to 3 ⁇ .
  • a surface relief is formed, which forms an optically variable effect.
  • it is preferably a hologram, Kinegram® or Trustseal®, a preferably linear or crossed sinusoidal diffraction grating, a linear or crossed single or multi-level rectangular lattice, a
  • Zero-order diffraction structure an asymmetric relief structure, a blaze grating, a preferably isotropic or anisotropic, matt structure, or a light-diffractive and / or refractive and / or light-focusing
  • Micro or nanostructure a binary or continuous Fresnel lens, a binary or continuous Fresnel freeform surface, a microprism structure or a combination structure thereof.
  • the metal layer 15 is at least partially on the surface of
  • Applied replicating and consists in particular of aluminum, copper, chromium, silver and / or gold or alloys of the aforementioned metals with a layer thickness of 5 nm to 100 nm, preferably from 10 nm to 50 nm.
  • a first printing layer 12 is subsequently printed on a surface of the protective layer 1 16.
  • the paint may consist of polyacrylic acid.
  • Such a varnish can be removed from its substrate by treatment with an alkaline etchant. This allows a later structuring of the first printed layer 12.
  • the lacquer of the first printing layer 12 colorants, especially colorful or achromatic pigments and / or effect pigments, UV excitable fluorescent pigments, thin film pigments, cholesteric liquid crystal pigments, dyes and / or metallic or
  • a color pigment having a proportion of between 5% and 35%, in particular between 10% and 25%, in the lacquer used for printing the first printing layer 12 is, for example, a UV-luminescent pigment having one or more excitation wavelengths, for example 254 nm and / or 365 nm
  • a pigment is eg Lumilux Blue CD 710 (blue at 365 nm and blue at 254 nm) or BF1 (from Honeywell Specialty Chemicals or Microalarm, Hungary) (at 365 nm green fluorescent, at 254 nm red / orange fluorescent).
  • the first printing layer 12 is preferably applied in multiple colors, in particular in the form of a color gradient, color gradients or as a true color image.
  • the first printing layer 12 is gravure applied in the form of a grid, in particular a line grid with 60 lines / cm to 120 lines / cm and / or a line depth of 15 ⁇ to 45 ⁇ .
  • the first printing layer 12 in the form of a grid, in particular a cross-diagonal grid with a screen width of 40 cells / cm to 100 cells / cm and / or a depth of 15 ⁇ to 45 ⁇ be applied.
  • the first print layer 12 can be applied by screen printing, in particular with a screen thickness of 90T to 140T or 90S to 140S.
  • the first printing layer 12 thus provides the desired in the final multi-layer body 1 color of the resulting motif, but does not yet on the final contour of this motif. Two examples of the design of the first printing layer 12 are shown in FIGS. 4 and 7.
  • the printing layer 12 has a
  • the first printed layer 12 comprises a first partial region 121 and a second partial region 122. In both
  • Subareas 121, 122 includes the paint used in the visible
  • UV light Ultraviolet light (UV light) recognizable motif created, which is visible even in visible light.
  • the pigments and / or dyes visible in the visible spectral range should preferably be admixed only with a small proportion so as not to unduly weaken the luminescence of the UV-luminescent pigments and / or dyes in UV light.
  • Visible in the visible spectral range pigments and / or dyes are usually black in the UV light, i. absorb the UV light and thereby weaken the UV luminescence of adjacent in the paint UV luminescent pigments and / or dyes.
  • one UV color can be converted into a different visible pigment and / or dye in the first partial region 121 and in the second partial region 122 be mixed, so that the multicolor of the subject under UV light also in accordance, but different colors also visible under visible light.
  • a second printing layer 13 is applied to the first printing layer 12. This is shown in Fig. 2 in
  • the second printing layer 13 is monochrome, ie in full tone, printed. As a result, fine line structures, such as Guilloche pattern, can be realized.
  • the print layer 13 is drawn opaque black for illustrative purposes only. However, the printing layer 13 can also be transparent, translucent or transparent or translucent. Again, the pressure can be done in gravure or screen printing.
  • a minimum line thickness of 80 ⁇ m can be achieved with a minimum line spacing of 100 ⁇ m.
  • the paint used for printing the second printing layer 13 is
  • a solvent-based varnish of a PVC copolymer of vinyl chloride, vinyl acetate, dicarboxylic acid and a crosslinker e.g.
  • polyisocyanate or polyaziridine Polyisocyanate or polyaziridine.
  • lacquer of polyester and cellulose propionate and a crosslinker can be used Paint applied to the above-described, used to print the first printing layer 12 acrylic paint, this crosslinker reacts with the
  • Acrylic acid in this paint making it alkali-resistant and thus resistant to a subsequent etching step.
  • a treatment is carried out with a preferably alkaline etchant, for example with alkali metal hydroxide (NaOH) or alkali metal carbonate (Na 2 CO 3 ). It is advantageous if the alkaline etchant is used in a concentration of 0.5% to 3%, and / or at a temperature of 20 ° C to 50 ° C, and / or for a period of 0.5s to 5s ,
  • the etching process may be promoted by agitating the etchant, targeting the first print layer with the etchant, sonicating, brushing, and / or wiping.
  • the first printing layer 12 is completely and sharply removed in the areas where it is not covered by the second printing layer 13, removed.
  • the first print layer 12 provides the final coloration of the printed motif, while the contour of the motif is defined by the second print layer 13 and the etching step. This can be high-resolution and
  • a height compensation layer should be provided before the application of the layer composite 11, so that existing height differences in the partial printed layers 12, 13 do not impede subsequent process steps, in particular replication.
  • the motif thus created from the printing layers 12, 13 is used as a mask for a further exposure step.
  • the motif for the radiation to be exposed is partially impermeable by the use of pigments, dyes and / or transparent blockers, in particular UV blockers.
  • UV-luminescent pigments and dyes which may already be provided in the printing layers 12, 13, absorb the UV radiation and thus advantageously already act as UV blockers in a subsequent exposure
  • a metal layer 15 can be applied, for example by vapor deposition, sputtering,
  • a photoresist is then applied to this metal layer 15 and exposed through the motif and the metal layer 15 from the side of the motif formed by the printed layers 12 and 13. In the subsequent development of the photoresist are not
  • the metal layer 1 15 congruent and in register with the print layers 12 and 13.
  • the metal layer can now be demetallized partially, so that the metal is also congruent to the print layers 12, 13.
  • the optical effect of the multi-layer body 1 can also be significantly modified by combining the print layers 12, 13 with layers that are transparent in the visible range but block specific spectral regions in the UV region. This is particularly useful if the print layer 12 contains UV-fluorescent colorants.
  • the spectral range below a wavelength of 310 nm.
  • the optical effect for example, upon excitation of the colorant in the print layer 12 with a wavelength of 365 nm of look the front and with a light wavelength of 254 nm from the back of the multi-layer body 1 look different.
  • the second printing layer 13 can optionally also have such a UV blocker. This may be, for example, benzophenone 6.
  • the second printing layer 13 can also be used with pigments and / or
  • Colored dyes that are visible in the visible spectral range are visible in the visible spectral range.
  • a translucent optically variable pigment such as, for example, Iriodin® from Merck or Lumina® from BASF.
  • the second printing layer 13 is only partially overlapping printed with the first printing layer 12 and the iriodin removed where the second printing layer 13 is not present.
  • the result is a motif in the color of the second print layer 13, which is partially covered with the iriodin of the first print layer 12.
  • the iriodin and the second printing layer 13 are arranged in the perfect register.

Landscapes

  • Chemical & Material Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Accounting & Taxation (AREA)
  • Finance (AREA)
  • Business, Economics & Management (AREA)
  • Printing Methods (AREA)
  • Credit Cards Or The Like (AREA)
  • Diffracting Gratings Or Hologram Optical Elements (AREA)
  • Holo Graphy (AREA)
  • Laminated Bodies (AREA)

Abstract

L'invention concerne un procédé de fabrication d'un corps multicouche, comprenant les étapes consistant à : a) prendre une première couche d'impression ; b) appliquer partiellement une deuxième couche d'impression sur la première couche d'impression ; c) structurer la première couche d'impression à l'aide de la deuxième couche d'impression en tant que masque. L'invention concerne un corps multicouche ainsi obtenu et un document de sécurité pourvu d'un tel corps multicouche.
EP16711791.0A 2015-03-24 2016-03-09 Corps multicouche et son procédé de fabrication Active EP3274183B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015104416.1A DE102015104416A1 (de) 2015-03-24 2015-03-24 Mehrschichtkörper und Verfahren zu dessen Herstellung
PCT/EP2016/055006 WO2016150704A1 (fr) 2015-03-24 2016-03-09 Corps multicouche et procédé de fabrication

Publications (2)

Publication Number Publication Date
EP3274183A1 true EP3274183A1 (fr) 2018-01-31
EP3274183B1 EP3274183B1 (fr) 2023-07-12

Family

ID=55628994

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16711791.0A Active EP3274183B1 (fr) 2015-03-24 2016-03-09 Corps multicouche et son procédé de fabrication

Country Status (6)

Country Link
US (1) US11124008B2 (fr)
EP (1) EP3274183B1 (fr)
JP (1) JP6726204B2 (fr)
CN (1) CN107635785B (fr)
DE (1) DE102015104416A1 (fr)
WO (1) WO2016150704A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020070528A2 (fr) 2018-10-04 2020-04-09 Any Biztonsági Nyomda Nyrt. Procédé de création d'un élément de sécurité sur des documents de sécurité, document de sécurité contenant un élément de sécurité, et film de marquage à chaud pour document de sécurité

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018207251A1 (de) * 2018-05-09 2019-11-14 Bundesdruckerei Gmbh Verfahren zum Herstellen eines Sicherheitselements mit zwei Sicherheitsmerkmalen und Verwendung des Verfahrens
CN108790445A (zh) * 2018-06-08 2018-11-13 温州立可达印业股份有限公司 一种用于渐变网印刷产品的凹印印刷工艺
EP4271572A1 (fr) * 2020-12-29 2023-11-08 EPTAINKS S.p.A. Élément de sécurité pour documents, en particulier des billets de banque, et procédé pour sa fabrication

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0250878A (ja) 1988-08-15 1990-02-20 Toppan Printing Co Ltd 着色透視材の製造方法
US5270078A (en) 1992-08-14 1993-12-14 E. I. Du Pont De Nemours And Company Method for preparing high resolution wash-off images
US5292556A (en) 1992-12-22 1994-03-08 E. I. Du Pont De Nemours And Company Method for preparing negative-working wash-off relief images
ATA19212001A (de) * 2001-12-07 2005-09-15 Hueck Folien Gmbh Verfahren zur herstellung von bedruckten trägersubstraten
DE102004031099B4 (de) * 2004-06-28 2006-07-27 Leonhard Kurz Gmbh & Co. Kg Verfahren zur Herstellung einer bereichsweisen Metallisierung
DE102005006277B4 (de) 2005-02-10 2007-09-20 Ovd Kinegram Ag Verfahren zur Herstellung eines Mehrschichtkörpers
DE102006037431A1 (de) 2006-08-09 2008-04-17 Ovd Kinegram Ag Verfahren zur Herstellung eines Mehrschichtkörpers sowie Mehrschichtkörper
DE102007062089A1 (de) * 2007-12-21 2009-07-02 Giesecke & Devrient Gmbh Verfahren zum Erzeugen einer Mikrostruktur
JP2012169316A (ja) 2011-02-10 2012-09-06 Think Laboratory Co Ltd エッチングマスク付基材及びその製造方法
DE102013106827A1 (de) * 2013-06-28 2014-12-31 Leonhard Kurz Stiftung & Co. Kg Verfahren zur Herstellung eines Mehrschichtkörpers sowie Mehrschichtkörper
DE102013113283A1 (de) 2013-11-29 2015-06-03 Leonhard Kurz Stiftung & Co. Kg Mehrschichtkörper und Verfahren zu dessen Herstellung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020070528A2 (fr) 2018-10-04 2020-04-09 Any Biztonsági Nyomda Nyrt. Procédé de création d'un élément de sécurité sur des documents de sécurité, document de sécurité contenant un élément de sécurité, et film de marquage à chaud pour document de sécurité

Also Published As

Publication number Publication date
US11124008B2 (en) 2021-09-21
US20180043723A1 (en) 2018-02-15
JP6726204B2 (ja) 2020-07-22
JP2018512305A (ja) 2018-05-17
EP3274183B1 (fr) 2023-07-12
DE102015104416A1 (de) 2016-09-29
CN107635785B (zh) 2021-03-23
WO2016150704A1 (fr) 2016-09-29
CN107635785A (zh) 2018-01-26

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