EP3337675A1 - Élément de sécurité, procédé de production de ce dernier et support de données équipé de l'élément de sécurité - Google Patents

Élément de sécurité, procédé de production de ce dernier et support de données équipé de l'élément de sécurité

Info

Publication number
EP3337675A1
EP3337675A1 EP16756945.8A EP16756945A EP3337675A1 EP 3337675 A1 EP3337675 A1 EP 3337675A1 EP 16756945 A EP16756945 A EP 16756945A EP 3337675 A1 EP3337675 A1 EP 3337675A1
Authority
EP
European Patent Office
Prior art keywords
relief structure
layer
forming
film element
color
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
EP16756945.8A
Other languages
German (de)
English (en)
Other versions
EP3337675B1 (fr
Inventor
Giselher Dorff
Andreas Rauch
Manfred Heim
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Giesecke and Devrient Currency Technology GmbH
Original Assignee
Giesecke and Devrient Currency Technology GmbH
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
Family has litigation
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Application filed by Giesecke and Devrient Currency Technology GmbH filed Critical Giesecke and Devrient Currency Technology GmbH
Publication of EP3337675A1 publication Critical patent/EP3337675A1/fr
Application granted granted Critical
Publication of EP3337675B1 publication Critical patent/EP3337675B1/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
    • B42D25/20—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
    • 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
    • B41M3/148—Transitory images, i.e. images only visible from certain viewing angles
    • 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
    • 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
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/378—Special inks
    • 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
    • B42D25/425—Marking by deformation, e.g. embossing
    • 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

Definitions

  • the invention relates to a security element for securing
  • Security documents comprising a carrier having an embossing lacquer layer, which has a first relief structure forming a diffractive structure and a second, microstructure structure forming a micromirror arrangement, wherein the first relief structure has a spatial along the relief structure
  • the invention further relates to methods for producing such a security element and to a data carrier, e.g. a value document, with such a security element.
  • Data carriers such as value or ID documents, or others
  • Valuables such as branded goods, are often provided with security elements for the purpose of protection, which permit a verification of the authenticity of the data carriers and at the same time as protection against unauthorized use
  • Viewing angles convey a different image impression and, for example, depending on the viewing angle, another color or
  • Color Shifting Effect whose color impression for the viewer with the Viewing Angle changes.
  • the color shift effect is due to such thin-film elements
  • the path difference of the light reflected at the different layers depends on the one hand on the optical thickness of a dielectric
  • Spacer layer which determines the distance between a semi-transparent absorber layer and a reflective layer, and varies
  • Path difference in the order of the wavelength of the visible light is due to extinction and amplification of certain wavelengths, an angle-dependent color impression for the viewer.
  • Dielectric spacer layer a variety of different color shift effects can be designed.
  • security elements with multilayer thin-film elements which, when viewed in incident light, i. in reflection, appear in a first color and when viewed in the
  • the multilayer structure that appears golden when viewed in reflected light and blue when viewed in transmitted light.
  • the multilayer structure is based on two semitransparent mirror layers and a dielectric spacer layer arranged between the two mirror layers.
  • the invention is based on the object
  • a security element for securing value documents comprising a) the provision of a carrier having an embossing lacquer layer which has a first relief structure forming a diffractive structure and a second relief structure forming a micromirror arrangement;
  • metal pigments which are arranged so that they align spatially along the relief structure of the embossing lacquer layer and thus form a reflective layer;
  • Gluing the security element is suitable with a valuable item, on the layer structure obtained by the steps a) to d), optionally via one or more intermediate layers.
  • a security element for securing value documents comprising a) the provision of a support with an embossing lacquer layer which has a first relief structure forming a diffractive structure and a second relief structure forming a micromirror arrangement;
  • Micromirror arrangement forming relief structure in spatially along the relief structure aligned form remains
  • Gluing the security element is suitable with a valuable item, on the layer structure obtained by the steps a) to e), optionally via one or more intermediate layers.
  • a security element for securing value documents comprising a) providing a carrier with an embossing lacquer layer, which has a first relief structure forming a diffractive structure and a second, a
  • Micromirror arrangement has forming relief structure
  • Micromirror arrangement forming relief structure in spatially along the relief structure aligned form remains
  • metal pigments which are such that they align spatially along the relief structure of the embossing lacquer layer and thus form a reflective layer
  • Gluing the security element is suitable with a valuable item, on the layer structure obtained by the steps a) to d), optionally via one or more intermediate layers.
  • a security element for securing value documents comprising a) the provision of a support with an embossing lacquer layer which has a first relief structure forming a diffractive structure and a second relief structure forming a micromirror arrangement;
  • Micromirror arrangement forming relief structure in spatially along the relief structure aligned form remains
  • metal pigments which are arranged so that they align spatially along the relief structure of the embossing lacquer layer and thus form a reflective layer;
  • Security element is suitable with a valuable item, on the side of the carrier opposite the embossing lacquer layer, optionally via one or more intermediate layers.
  • a security element for securing value documents comprising a) the provision of a support with an embossing lacquer layer which has a first relief structure forming a diffractive structure and a second relief structure forming a micromirror arrangement;
  • Micromirror arrangement forming relief structure in spatially along the relief structure aligned form remains
  • Security element is suitable with a valuable item, on the side of the carrier opposite the embossing lacquer layer, optionally via one or more intermediate layers.
  • Security element for securing documents of value comprising a carrier with an embossing lacquer layer, which has a first, a diffractive structure forming relief structure and a second, micro-mirror arrangement forming a relief structure, wherein the first relief structure with a spatially along the relief structure aligned reflective layer is provided and the second relief structure is provided with a spatially along the relief structure oriented, colored thin-film element, wherein the security element by the method according to one of claims 1 to 13 is available.
  • a banknote such as a paper banknote, polymer banknote or composite film banknote, or identity card.
  • the value document referred to in the present description may be a banknote, in particular a paper banknote
  • an identification card such as a BCredit badge, a bank card, a cash card, an authorization card, an identity card or pass personalization page act.
  • viewing in incident light is illumination of the security element from one side and observation of the light Security elements from the same page.
  • a reflection in reflected light is thus present, for example, when the front of the security element is illuminated and also viewed.
  • a reflection in transmitted light is in the sense of this invention
  • a reflection in transmitted light is thus, for example, when the back of the security element illuminated and the front of the security element is considered. The light thus shines through the security element.
  • the security element according to the invention can e.g. as a patch or label, as an (endless) strip or as an (endless) thread.
  • the data carrier substrate of the data carrier is in particular a paper substrate or a paper-like substrate, a polymer substrate
  • Paper / film / paper composite substrate or a film / paper / film composite substrate may be used in the case of a paper substrate, a
  • Paper / film / paper composite substrate or a film / paper / film composite substrate e.g. be produced by means of a continuous recess within the paper layer (s).
  • the paper layer may be coated by means of a suitable liquid, e.g. by means of aqueous
  • Sulfuric acid solution to be made transparent in a certain range.
  • one on a transparent polymer substrate
  • a window area for example by means of congruent recesses are generated in the applied on the front and back of the polymer substrate opaque print layers.
  • a generic security element to provide a carrier or a carrier substrate with a layer structure which comprises, inter alia:
  • Hologram structure forming relief structure on the one hand and a microstructure forming a relief structure (i.e., a micro-optical relief structure) on the other hand;
  • a reflective layer aligned along the diffractive structure e.g. by vapor deposition (see the preparation processes according to the second or fifth aspect of the invention) or by printing technology (see the preparation processes according to the first, the third or the fourth aspect of the invention);
  • Reflection layer and can not recognize the arranged below the reflective layer colored thin-film element
  • a (e.g., transparent) adhesive layer suitable for bonding the
  • Security elements with a data carrier such as a valuable item, is suitable.
  • Platelet-shaped metal pigments are suitable for producing a reflection layer which can be obtained by printing technology.
  • Suitable platelet-shaped metal pigments are known, for example, from WO 2013/186167 A2, WO 2010/069823 A1, WO 2005/051675 A2 (see, for example, the description on page 11, line 10, to page 12, penultimate paragraph) and WO 2011/064162 A2 known.
  • the platelet-shaped metal pigments described therein have the advantage that they conform to a substrate having a relief structure, in particular a relief with microstructures and / or nanostructures, so well that the difference to a conventional metallization obtainable by vapor deposition is almost no longer recognizable.
  • the simple, printing-technical production of the reflection layer makes it possible to dispense with complex process steps, such as printing the carrier with a soluble wash in the form of a desired recess within the reflection layer to be produced, generating a metallization by vapor deposition and washing the washing paint together with the above the washing paint on ebravier metallization.
  • the ink which can be used according to the invention and is based on platelet-shaped metal pigments for producing a reflection layer which can be obtained by printing can be based, for example, on the metal pigment described in WO 2005/051675 A2 (see, for example, the description on page 11, line 10, to page 12, penultimate paragraph). Based compositions.
  • the pigments are based on a metal, preferably selected from the group consisting of aluminum, stainless steel, nichrome, gold, silver, platinum and copper.
  • the metal is particularly preferably aluminum, the average particle diameter preferably being in a range from 2 to 50 ⁇ m, more preferably in a range from 5 to 15 ⁇ m, measured with a Coulter LS130 laser diffraction granulometer.
  • Such a printing ink makes it possible to provide a "silver" mirror layer
  • the metal pigment compositions (eg, yellow) may be colored.
  • the pigments have a longest dimension of edge length from end-to-end in a range of 15 nm to 1000 nm and are based on a transition metal selected from the group consisting of Cu, Ag, Au, Zn , Cd, Ti, Cr, Mn, Fe, Co, Ni, Ru, Rh, Pd, Os, Ir, and Pt.
  • the transition metal is preferably Ag.
  • the aspect ratio ie, the ratio of the longest end-to-end dimension based on the thickness
  • Binder to metal pigment is preferably below 10: 1, especially below 5: 1. Depending on the choice of
  • the color can be tuned when viewed in the print layer and the color when viewed in reflection (eg, blue in transmission and silver, gold, bronze, Copper or violet in reflection, in addition violet, Magenta, pink, green or brown in transmission and different colors in reflection, depending on the choice of pigment / binder ratio).
  • Colors with gold / blue color change between reflection and transmission are mentioned, for example, in Examples 1, 2 and 3 in Table 1 of WO 2011/064162 A2.
  • Example 4 shows a color with gold / violet color change
  • Example 5 a color with green-gold / magenta color change
  • Example 7 a color with violet / green color change
  • Example 8 a color with silver / opaque color change.
  • the colored thin film element may e.g. a color dumping
  • Such a thin-film element comprises e.g. an interference-capable, multi-layered structure with
  • a reflective layer in particular a metallic
  • a semitransparent (mirror) layer or absorber layer selected in particular from the group consisting of Al, Ag, Ni, Cr, Cu, Au and an alloy of one or more of the aforementioned elements, with Cr being preferred; and
  • a dielectric layer for example SiO 2 , arranged between the reflective layer and the semitransparent (mirror) layer or absorber layer,
  • the colored thin-layer element may furthermore be a semitransparent thin-layer element which, when viewed in the image, is viewed by the viewer Reflected light and when viewed in transmitted light different
  • Such a thin-film element comprises e.g. a multilayer structure with two semitransparent layers and one arranged between the two semitransparent layers
  • Shades are in particular complementary colors.
  • a multilayer structure is based on two semitransparent mirror layers and one between the two semitransparent ones
  • Mirror layer is particularly suitable a metal which is selected from the group consisting of Al, Ag, Ni, Cr, Cu, Au and an alloy of one or more of the aforementioned elements, wherein Al or Ag are preferred as a semitransparent mirror layer and Al is particularly preferred becomes.
  • Semitransparent mirror layers arranged dielectric layer preferably have the following physical nature:
  • the two semitransparent mirror layers are preferably selected from Al or Ag;
  • the dielectric layer is in particular an SiO 2 layer;
  • the respective preferred layer thickness lies in a range of 5 nm to 20 nm, particularly preferably in a range of 10 nm to 14 nm;
  • the SiO 2 dielectric layer preferably has a layer thickness in a range from 50 nm to 450 nm, more preferably in a range from 80 nm to 260 nm, the ranges from 80 nm to 100 nm and from 220 nm to 240 nm specifically for the provision of a gold / Blue color change are particularly preferred;
  • the respective preferred layer thickness is in a range of 15 nm to 25 nm; the SiO 2 dielectric layer preferably has one
  • Layer thickness in a range of 50 nm to 450 nm, more preferably in a range of 80 nm to 260 nm, with the ranges of 80 nm to 100 nm and from 220 nm to 240 nm being especially preferred for providing a gold / blue color change.
  • the multilayered layer structures mentioned not only enable the production of a semitransparent functional layer which, when viewed in reflected light, appears golden in color and exhibits a blue hue when viewed in transmitted light, but further color changes can be produced depending on the choice of the layer thickness, in particular of the dielectric layer, e.g.
  • a printable thin-film element comprises, for example, a printing layer with an effect pigment composition which, when viewed in reflected light, has a different color than when viewed in reflected light Transmitted light, in particular a gold / blue color change, a gold / violet color change, a green-gold / magenta color change, a violet / green color change or a silver / opaque color change shows.
  • a printing layer with an effect pigment composition which, when viewed in reflected light, has a different color than when viewed in reflected light Transmitted light, in particular a gold / blue color change, a gold / violet color change, a green-gold / magenta color change, a violet / green color change or a silver / opaque color change shows.
  • Such printing inks are described, for example, in WO 2011/064162 A2.
  • Figures 1 to 6 an example of the production of a
  • FIGS 7 to 15 an example of the production of a
  • Figures 16 to 22 an example of the production of a
  • Figures 23 to 30 show another example of the production of a
  • Figures 31 to 37 an example of the production of a
  • inventive security element according to the fourth aspect of the invention; a schematic representation of a banknote with a security element according to the invention; a schematic representation of another banknote with a security element according to the invention.
  • FIG. 47 shows a schematic illustration of a banknote 1 with a transparent window area 3 (dashed line)
  • a security element 2 according to the invention in the form of a patch.
  • the banknote 1 may e.g. are based on a (for example transparent) plastic substrate, wherein the banknote in area 3 has neither an ink on the front side nor on the rear side, so that the area 3 can be recognized by the viewer as a transparent window area.
  • the banknote 1 may alternatively be based on a foil / paper / foil composite substrate, the central paper layer in the region 3 having a (in particular filled with transparent adhesive or filler)
  • Foil / paper / film composite substrates are known from WO 2004/028825 A2.
  • the banknote 1 is based on a
  • the banknote 1 is based on a
  • Paper substrate which has a continuous recess in area 3.
  • the continuous recess is on at least one side of the
  • Paper substrate covered by a transparent film see, for example, WO 2011/015622 AI.
  • the security element 2 shown in FIG. 47 contains a central, color-shifting motif 5 formed by a micromirror arrangement, which is surrounded by a motif 4 formed by a hologram.
  • FIG. 48 shows a schematic representation of a further banknote 6 based on a paper substrate, which is provided on its front side with a security element according to the invention in the form of a strip 7 (shown in dashed lines).
  • the strip 7 has in the present example, a width of 8 mm and has a farbkippendes by a
  • Micromirror arrangement formed motif 9 and formed by a hologram motif 8.
  • FIG. 6 shows the security element 7 in FIG.
  • Carrier 10 in the form of a (eg transparent) plastic film, such as a PET film, provided with an embossing lacquer 11.
  • the relief structure (ie the surface) of the embossing lacquer 11 has a microstructure in the partial area IIa and a nanostructure in the partial area IIb.
  • the embossing lacquer 11 in the sub-area IIb is printed with the printing ink known from WO 2005/051675 A2.
  • the printing ink is based on platelet-shaped metal pigments (in particular Al pigments) and leads to the production of a reflection layer 12, in the present case a "silver" mirror layer.
  • a soluble wash ink 13 i.e., a printing ink which, after being printed, is effected by means of a printing ink 13
  • Washing liquid can be washed out or removed) in such a way that the areas forming a diffractive structure
  • Relief structure IIa recesses in the applied wash paint 13 form. Washing colors are e.g. from EP 1 972462 A2 and the prior art cited in paragraphs [0004] to [0006] of this publication.
  • the embossing lacquer 11 printed with the wash ink 13 is covered with a multi-layer thin-film element 14 over its entire area
  • Such a thin film element 14 has a semitransparent absorber layer 15 (e.g., Cr), a dielectric
  • Spacer layer 16 eg SiO 2
  • a reflective layer 17 eg Al
  • a demetallization step is carried out in which the printed wash ink area 13 together with the areas above it of the multilayer thin-film element 14
  • the resulting layer structure is provided with a (e.g.
  • the resulting embossing lacquer 11 has, in consideration of the
  • the thin-film element 14 arranged in the sub-area IIb is not recognizable to the observer because it is obscured by the metal-pigment printed layer 12.
  • the reflectivity of the metal pigment print layer 12 is enhanced by the underlying thin film element 14, i. the metallic character of the metal pigment printing layer 12 is stronger in this way.
  • the carrier 10 shown in FIG. 6 can be designed as a transfer film detachable from the embossing lacquer layer 11. After bonding the security element shown in FIG. 6 with a value document substrate by means of the adhesive layer 19 and after detaching the transfer film 10, the viewer would directly perceive the embossing lacquer layer 11 when viewing the security document provided with the security element.
  • Figures 7 to 15 illustrate the manufacture of a
  • a carrier 10 is in the form of a (e.g., transparent) plastic film, e.g. a PET film, provided with an embossing lacquer 11.
  • the relief structure (i.e., the surface) of the embossing lacquer 11 has a microstructure in the partial area IIa and a nanostructure in the partial area IIb.
  • the printing of a soluble washing ink 20 takes place in such a way that the region of the relief structure IIb forming a diffractive structure forms a recess in the applied washing ink 20.
  • FIG. 8 the printing of a soluble washing ink 20 takes place in such a way that the region of the relief structure IIb forming a diffractive structure forms a recess in the applied washing ink 20.
  • the layer structure provided with the scrubbing 20 is coated over its entire area by vapor deposition with a metallization 21, in the present case aluminum.
  • the metallization 21 adapts in the partial region IIb to the diffractive relief of the embossing lacquer layer 11.
  • a demetallization step is carried out in which the imprinted wash ink area 20 is washed off together with the areas of the metallization 21 located above it.
  • Reflection layer 21 remains in the region of the relief structure IIb of embossing lacquer 11 forming a diffractive structure.
  • the printing of a soluble washing ink 22 takes place in such a way that the region of the relief structure IIa forming a micromirror arrangement has a recess in the applied surface
  • Wash color 22 forms. According to FIG. 12, the one provided with the wash ink 22 becomes
  • Such a thin film element 23 has a semi-transparent absorber layer 24 (e.g., Cr), a dielectric spacer layer 25 (e.g., S1O2), and a reflective layer 26 (e.g., Al), and may be formed by vapor deposition.
  • a semi-transparent absorber layer 24 e.g., Cr
  • a dielectric spacer layer 25 e.g., S1O2
  • a reflective layer 26 e.g., Al
  • a demetallization step is carried out, in which the printed wash ink area 22 together with the areas of the multilayer thin-film element 23 lying above it
  • the resulting layer structure is provided with a (e.g.
  • the resulting embossing lacquer 11 has, in consideration of the
  • the carrier 10 shown in FIG. 15 can be configured as a transfer film detachable from the embossing lacquer layer 11. After adhering the security element shown in FIG. 15 to a value document substrate by means of the adhesive layer 28 and after detaching the transfer film 10, the viewer would directly perceive the embossing lacquer layer 11 when viewing the security document provided with the security element.
  • Figures 16 to 22 illustrate the manufacture of a
  • a carrier 10 is in the form of a (e.g., transparent) plastic film, e.g. a PET film, provided with an embossing lacquer 11.
  • the relief structure (i.e., the surface) of the embossing lacquer 11 has a microstructure in the partial area IIa and a nanostructure in the partial area IIb.
  • the printing on of a soluble washing ink 29 takes place in such a way that the region of the relief structure IIa forming a micromirror arrangement forms a recess in the applied washing ink 29
  • Such a thin film element 30 has a semi-transparent absorber layer 31 (e.g., Cr), a dielectric spacer layer 32 (e.g., S1O2), and a reflective layer 33 (e.g., Al), and may be formed by vapor deposition.
  • a semi-transparent absorber layer 31 e.g., Cr
  • a dielectric spacer layer 32 e.g., S1O2
  • a reflective layer 33 e.g., Al
  • a demetallization step is carried out in which the imprinted wash ink area 29 is washed off together with the overlying areas of the multilayer thin-film element 30, so that the colored thin-layer element 30 in the area of the micromirror arrangement forming relief structure IIa in spatially aligned along the relief structure form remains.
  • the embossing lacquer 11 in the partial area IIb is printed with the printing ink known from WO 2005/051675 A2.
  • the printing ink is based on platelet-shaped metal pigments (in particular Al pigments) and leads to the production of a reflection layer 34, in the present case a "silver" mirror layer.
  • the resulting layer structure is provided with a (e.g.
  • the resulting embossing lacquer 11 has, in consideration of the
  • the carrier 10 shown in FIG. 22 can be designed as a transfer film detachable from the embossing lacquer layer 11. After bonding the security element shown in FIG. 22 to a value document substrate by means of the adhesive layer 36 and after detaching the transfer film 10, the viewer would directly perceive the embossing lacquer layer 11 when viewing the value document provided with the security element.
  • Figures 23 to 30 illustrate another example of the production of a security element according to the invention.
  • the relief structure (ie the surface) of the embossing lacquer 11 has a microstructure in the partial area IIa and a nanostructure in the partial area IIb.
  • the imprinting of a soluble wash ink 37 takes place in such a way that the area of the relief structure forming a diffractive structure IIb and the area of the microstructure form one another
  • Relief structure IIa each form a recess in the applied wash paint 37.
  • a reflective layer 38 eg AI
  • a spacer layer 39 eg Si0 2
  • the printing of a soluble wash ink 40 takes place only in the region of the relief structure IIb forming a diffractive structure.
  • the layer structure is completely covered with a
  • Absorber layer 41 e.g., Cr
  • Absorber layer 41 e.g., Cr
  • a demetallization step is carried out, in which the printed wash ink areas are washed off together with the layers above.
  • the relief structure IIb of the embossing lacquer 11 forming a diffractive structure
  • Reflection layer 38, the spacer layer 39 and the absorber layer 41, the each adapt to the relief and together form a color-shifting layer.
  • the resulting layer structure is provided with a (e.g.
  • primer layer 42 e.g., a UV varnish
  • the carrier 10 is provided on the side opposite the security element structure by means of a primer layer 43 with a heat seal lacquer 44 suitable for bonding the security element to a value document substrate.
  • the resulting embossing lacquer 11 has, in consideration of the
  • Micromirror motif on and in subarea IIb a silver hologram motif.
  • Figures 31 to 37 illustrate the manufacture of a
  • a carrier 10 is in the form of a (e.g., transparent) plastic film, e.g. a PET film, provided with an embossing lacquer 11.
  • the relief structure (i.e., the surface) of the embossing lacquer 11 has a microstructure in the partial region IIa and a nanostructure in the partial region Hb.
  • the printing of a soluble wash ink 45 takes place in such a way that the area of the micromirror arrangement is realized forming relief structure IIa a recess in the applied
  • Such a thin film element has a reflective layer 46 (e.g., Al), a dielectric spacer layer 47 (e.g., SiO 2), and a semitransparent absorber layer 48 (e.g., Cr), and may be formed by vapor deposition.
  • a reflective layer 46 e.g., Al
  • a dielectric spacer layer 47 e.g., SiO 2
  • a semitransparent absorber layer 48 e.g., Cr
  • a demetallization step is carried out in which the printed wash ink area 45 together with the overlying areas of the multi-layered thin-film element
  • Area of the relief structure IIa forming a micromirror arrangement remains in form aligned spatially along the relief structure.
  • the embossing lacquer 11 in the partial area IIb is printed with the printing ink known from WO 2005/051675 A2.
  • the printing ink is based on platelet-shaped metal pigments (in particular Al pigments) and leads to the production of a reflection layer 49, in the present case a "silver" mirror layer.
  • the resulting layer structure is provided with a
  • Primer layer 50 (e.g., a UV varnish) as a protective layer.
  • the carrier 10 is provided with a primer layer 51 on the side opposite the security element structure for bonding the security element to a value document substrate, suitable heat sealing lacquer 52 is provided.
  • the resulting embossing lacquer 11 has, in consideration of the
  • Figures 38 to 46 illustrate the manufacture of a
  • a carrier 10 is in the form of a (e.g., transparent) plastic film, e.g. a PET film, provided with an embossing lacquer 11.
  • the relief structure (i.e., the surface) of the embossing lacquer 11 has a microstructure in the partial region IIa and a nanostructure in the partial region Hb.
  • the printing of a soluble washing ink 53 is effected in such a way that the region of the relief structure Hb forming a diffractive structure forms a recess in the applied washing ink 53.
  • a demetallization step is carried out, in which the printed wash ink area 53 is washed off together with the areas of the metallization 54 lying over it.
  • the reflection layer 54 remains in the region of the relief structure forming a relief structure IIb of the embossing 11.
  • the printing of a soluble wash ink 55 is effected in such a way that the region of the relief structure IIa forming a micromirror arrangement forms a recess in the applied wash paint 55.
  • Such a thin film element has a reflective layer 56 (e.g., Al), a dielectric spacer layer 57 (e.g., S1O2), and a semitransparent absorber layer 58 (e.g., Cr), and may be formed by vapor deposition.
  • a reflective layer 56 e.g., Al
  • a dielectric spacer layer 57 e.g., S1O2
  • a semitransparent absorber layer 58 e.g., Cr
  • a demetallization step is carried out in which the printed wash ink area 55 together with the overlying areas of the multilayer thin-film element
  • the resulting layer structure is provided with a (e.g.
  • the carrier 10 is provided with a primer layer 60 on the side opposite the security element structure for bonding the security element with a value document substrate suitable heat sealing lacquer 61 provided.
  • the resulting embossing lacquer 11 has, in consideration of the

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Business, Economics & Management (AREA)
  • Accounting & Taxation (AREA)
  • Finance (AREA)
  • Credit Cards Or The Like (AREA)
  • Diffracting Gratings Or Hologram Optical Elements (AREA)
  • Printing Methods (AREA)

Abstract

L'invention concerne un procédé de production d'un élément de sécurité. Le procédé selon l'invention comprend les étapes suivantes consistant à : a) fournir un support pourvu d'une couche de vernis de gaufrage, qui comporte une première structure en relief formant une structure diffractive et une deuxième structure en relief formant un ensemble de micromiroirs ; b) imprimer la première structure en relief formant une structure diffractive d'une encre d'impression à base de pigments métalliques en formes de plaquettes qui sont de nature telle qu'ils s'orientent spatialement le long de la structure en relief de la couche de vernis de gaufrage formant ainsi une couche réfléchissante ; c) appliquer par impression une encre lavable soluble d'une manière telle que les zones de la structure en relief formant une structure diffractive et de la deuxième structure en relief formant un ensemble de micromiroirs forment des évidements dans l'encre lavable appliquée ; d) appliquer sur toute la surface un élément à couche mince coloré, puis retirer par lavage l'encre lavable de sorte que l'élément à couche mince coloré reste sous une forme spatialement orientée le long de la structure en relief respective dans les zones de la première structure en relief formant une structure diffractive et de la deuxième structure en relief formant un ensemble de micromiroirs ; e) appliquer une couche de colle.
EP16756945.8A 2015-08-17 2016-08-16 Élément de sécurité, procédé de production de ce dernier et support de données équipé de l'élément de sécurité Active EP3337675B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015010744.5A DE102015010744A1 (de) 2015-08-17 2015-08-17 Sicherheitselement, Verfahren zum Herstellen desselben und mit dem Sicherheitselement ausgestatteter Datenträger
PCT/EP2016/001396 WO2017028950A1 (fr) 2015-08-17 2016-08-16 Élément de sécurité, procédé de production de ce dernier et support de données équipé de l'élément de sécurité

Publications (2)

Publication Number Publication Date
EP3337675A1 true EP3337675A1 (fr) 2018-06-27
EP3337675B1 EP3337675B1 (fr) 2019-11-13

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EP16756945.8A Active EP3337675B1 (fr) 2015-08-17 2016-08-16 Élément de sécurité, procédé de production de ce dernier et support de données équipé de l'élément de sécurité

Country Status (4)

Country Link
EP (1) EP3337675B1 (fr)
CN (1) CN107848322B (fr)
DE (1) DE102015010744A1 (fr)
WO (1) WO2017028950A1 (fr)

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CN107848322B (zh) 2019-09-03
WO2017028950A1 (fr) 2017-02-23
EP3337675B1 (fr) 2019-11-13
CN107848322A (zh) 2018-03-27
DE102015010744A1 (de) 2017-02-23

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