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
  • B42D25/328—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
  • B42D25/373—Metallic materials

Definitions

• the invention relates to a security element for securing
• a layer structure comprising a reflective layer, which is arranged by means of an embossing lacquer layer with an embossed relief structure on the support, a colored thin-film element and a transparent adhesive layer, which is suitable for bonding the security element with a
• Valuable object is suitable, wherein the reflection layer is available by printing technology.
• the invention further relates to methods for producing such a security element and a data carrier 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 shift effect uses multi-layer thin-film elements whose color impression changes for the viewer with the viewing angle (hereinafter referred to as color shift effect).
• the color shift effect is based on such thin-film elements on viewing angle-dependent
• Partial layers of the element 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 on the other hand varies with the respective viewing angle. Since the
• 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.
• a suitable choice of material and thickness of the 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 layer structure comprising a reflective layer which is arranged by means of an embossing lacquer layer with an embossed relief structure on the support, a colored thin-film element and a transparent adhesive layer, which is suitable for bonding the security element with a
• the reflective layer is available by printing technology and based on platelet-shaped metal pigments, which are such that they align spatially along the relief structure of the embossing lacquer layer.
• the relief structure has in particular microstructures and / or
• the relief structure may be formed in a first portion of the embossing lacquer layer (i.e., the area which may be joined, for example, to the
• Reflective layer have microstructures and have nanostructures in a second portion of the embossing lacquer layer (i.e., the region which is provided, for example, with the colored thin-film element).
• the relief structure may be formed in a first portion of the embossing lacquer layer (i.e., the region which may be joined, for example, to the
• Reflection layer provided have nanostructures and in a second portion of the embossing lacquer layer (ie, the region which is provided for example with the colored thin-film element) have microstructures.
• the metal pigments are based in particular on a metal selected from the group consisting of aluminum, stainless steel, nichrome, gold, silver, platinum and copper, preferably on aluminum, the average particle diameter preferably being in a range from 2 to 50 ⁇ m, more preferably in one range is from 5 to 15 ⁇ .
• the metallization obtained in this way appears in the form of a silver mirror layer.
• a security element according to paragraph 1, wherein the layer structure arranged on the carrier has the following layers:
• reflection layer and the colored thin-film element are arranged in particular congruent to each other.
• the order may be:
• the order may be from the carrier:
• Thin-film element is different at a viewer
• a thin film element comprising a reflective layer, a dielectric spacer layer and an absorber layer, wherein the
• Reflection layer or by the platelet-shaped metal pigments based reflection layer is formed.
• Thin-film element is that a viewer when looking at
• Metal pigments and the ink-containing printing ink are available in the form of a double layer, wherein the dyes are such that they form a color layer when drying the ink above the deposited on the embossing lacquer layer, based on platelet-shaped metal pigments reflection layer.
• Hologram, a holographic grating image or a hologram-like diffraction structure forms an achromatic structure, such as a
• Matt structure a micromirror arrangement, a Blazegitter with a sawtooth-like furrow profile or Fresnellinsen- arrangement.
• a security element according to paragraph 9 wherein the reflection layer, which is arranged on the embossing lacquer layer with embossed relief structure and is based on platelet-shaped metal pigments, constitutes a micromirror arrangement.
• the security element is a security band, a
• Security element for securing value documents comprising a) the provision of a carrier which has an embossing lacquer layer with an embossed relief structure;
• 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;
• Thin-film element that a viewer a different when viewed in incident light and when viewed in transmitted light
• a transparent adhesive layer which is suitable for bonding the security element to a valuable article, optionally via one or more intermediate layers.
• step c) takes place, namely the printing of a soluble washing ink in the form of a desired recess within the colored thin-film element, wherein the washing color after applying the colored thin-film element together with this by a
• a security element for securing value documents comprising f) providing a support having an embossing lacquer layer with an embossed relief structure, the emboss lacquer layer containing a first subarea and a second subarea, of which the first subarea is intended to be provided with a reflective layer and the second part is meant to be colored
• Thin-film element to be provided and the two sub-areas each form patterns, characters or a coding and are arranged in particular at least partially register accurate to each other;
• Thin-film element that a viewer a different when viewed in incident light and when viewed in transmitted light
• Relief structure in the first portion of the embossing lacquer layer forms a diffractive structure, such as a hologram, a holographic grating image or a hologram-like diffraction structure and the relief structure in the second portion of the embossing lacquer layer forms a micromirror arrangement.
• a diffractive structure such as a hologram, a holographic grating image or a hologram-like diffraction structure
• the relief structure in the second portion of the embossing lacquer layer forms a micromirror arrangement.
• the relief structure has a nanostructure in the first subregion of the embossing lacquer layer, and has a microstructure in the second subregion of the embossing lacquer layer.
• Security element for securing value documents comprising 1) the provision of a carrier which has an embossing lacquer layer with an embossed relief structure;
• Metal pigments are such that they align spatially along the relief structure of the embossing lacquer layer and thus form a reflective layer;
• Double layer is obtained in which the dyes above the on the Embossed lacquer layer deposited on platelet-shaped
• Metallic pigments based reflective layer form a color layer; o) the application of a transparent adhesive layer, which is suitable for bonding the security element with a valuable item, optionally via one or more intermediate layers.
• a banknote such as a paper banknote, polymer banknote or composite film banknote, or identity card.
• a generic security element to provide a support (ie a support substrate) with a layer structure comprising a printable reflection layer, a colored thin film element and a transparent adhesive layer suitable for adhering the security element to a valuable article.
• the reflection layer is arranged on the carrier by means of an embossing lacquer layer with an embossed relief structure.
• Platelet-shaped metal pigments suitable for producing the reflection layer are known from WO 2013/186167 A2, WO 2010/069823 A1, WO 2005/051675 A2 (see therein eg the description on page 11, line 10, to page 12, penultimate paragraph) and WO 2011/064162 A2. The ones described therein
• platelet-shaped metal pigments have the advantage that they form a substrate with a relief structure, in particular a relief with
• Microstructures and / or nanostructures adapt so well that the difference to a conventional, available by vapor deposition metallization is almost unrecognizable.
• 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 applied metallization.
• the security element according to the invention has the advantage that the reflective layer, after the security element has been stuck to the value document substrate (for example on paper, polymer or on a
• Foil composite based protected both by the support of the security element, as well as by the value document.
• the printing ink based on platelet-shaped metal pigments used according to the invention can be based, for example, on the metal pigment compositions described in WO 2005/051675 A2 (see therein, for example, the description on page 11, line 10, to page 12, penultimate paragraph).
• the pigments are based on a metal, which is 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.
• the printing ink used according to the invention may be based, for example, on the effect pigment compositions with color-shift effect described in WO 2011/064162 A2.
• the pigments have from end-to-end a longest dimension of edge length 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.
• Transition metal is preferably Ag.
• the aspect ratio i.e.
• the ratio of the longest end-to-end dimension with thickness is preferably at least 1.5, more preferably in the range of 1.5 to 300.
• the ratio of the binder to metal pigment is
• Pigment / binder ratio the color in reflection of the print layer in transmission and the color when viewed in reflection (eg blue in transmission and silver, gold, bronze, copper or violet in reflection, beyond violet, magenta, pink, Green or brown in transmission and different colors in reflection, depending on the choice of pigment / binder ratio). Colors with
• 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. be formed by a single layer or be a multilayer thin-film element.
• a colored multilayer thin-film element e.g. the thin-film element with color-shift effect mentioned at the outset in the description is used whose color impression changes with the viewing angle for the viewer.
• a thin-film element has a semitransparent absorber layer, a dielectric spacer layer, and a reflective layer.
• a suitable choice of material and thickness, in particular of the dielectric spacer layer a large number of different color-shift effects can be designed.
• Spacer layer are suitable e.g. S1O2 or AI2O3.
• the reflection layer of the thin-film element is preferably by an opaque or a
• semitransparent metal layer preferably by an opaque or semi-transparent aluminum layer.
• other metals such as silver, nickel, copper, iron, chromium, gold or other highly reflective materials come into consideration.
• the reflection layer of the thin-film element may be a separate layer.
• the reflection layer of the thin-film element can also be formed by the reflection layer of the invention
• the semitransparent absorber layer may e.g. be formed by a chromium layer.
• a semitransparent thin-film element which has a Viewers when viewing in reflected light and when viewing in transmitted light a different color impression conveys, eg a
• Spacer layer has.
• a thin-film element which appears gold-colored in incident light and blue in transmitted light, is described in WO 2011/082761 A1.
• the two mirror layers are preferably formed from silver or a silver alloy.
• the two mirror layers can look out
• the dielectric spacer layer is preferably formed from a homogeneous medium, eg SiO 2 . However, it can also consist of an inhomogeneous medium, for example SiO 2 with embedded nanoparticles (which are made of latex, for example). Further preferred is within the dielectric
• Spacer layer introduced a formed of copper semi-transparent layer.
• Colored, multi-layered thin-film elements which appear gold-colored in the incident light and blue in the transmitted light can be chosen in particular from the following layer sequences (see also FIGS.
• a color layer can be used which is based in particular on inorganic colored pigments or on organic dyes.
• Reflection layer of the security element according to the invention as well as based on a single layer colored thin-film element can be produced by printing technology by means of a single ink on a mixture of platelet-shaped metal pigments and from
• Organic dyes or suitable inorganic colored pigments containing ink leads to the production of the reflective layer and the colored thin-film element in the form of a Bilayer.
• the organic dyes (or inorganic dyes) or inorganic dyes
• Colored pigments are such that they form a color layer on drying of the printing ink above the reflection layer deposited on the embossing lacquer layer and based on platelet-shaped metal pigments.
• the invention further includes a data carrier with a
• the data carrier may be a value document, such as a banknote, in particular a
• Authorization card an identity card or a
• Figure 12 is a schematic representation of a banknote with a security element according to the invention.
• FIG. 12 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 transparent plastic substrate, wherein the banknote in the area 3 neither on the front side, nor on the back has a printing ink, so that the area 3 can be seen 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
• Paper / foil / paper composite substrate, the outer paper layers each have a recess in the area 3 (see, for example, the WO
• 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. 12 contains a motif 4, which is shown in FIG. 12 for illustration as a coat of arms-shaped motif 4.
• the motif 4 may represent any desired patterns, characters or codes, in particular an alphanumeric string, such as the denomination of a banknote 1.
• Security elements 2 according to a first exemplary embodiment are explained in more detail below in conjunction with FIGS. 1 to 7.
• Plastic film e.g. a PET film, provided with an embossing 6.
• the relief structure (i.e., the surface) of the embossing lacquer 6 has a microstructure in the partial area 7a and a nanostructure in the partial area 7b.
• the embossing lacquer 6 is first coated with a wash ink (i.e., a printing ink which after being printed by means of a wash ink)
• a wash ink i.e., a printing ink which after being printed by means of a wash ink
• Washing liquid can be washed out or removed) a
• Print layer 8 printed in the form of a desired portion without color shift effect. Washing colors are for example from the publication EP 1 972462 A2 and the prior art cited in paragraphs [0004] to [0006] of this document.
• the embossing lacquer 6 printed with the wash ink 8 is covered with a multi-layer thin-film element 9 over its entire area
• Such a thin film element 9 has a semitransparent absorber layer (e.g., Cr), a dielectric
• Spacer layer eg SiO 2
• a reflective layer eg AI
• a demetallization step is carried out, in which the printed wash ink region 8 is washed off together with the overlying layer region of the multilayer thin-film element 9.
• the resulting embossing lacquer 6 has only in
• Subarea 7a a Farbkippeff effect on.
• the embossing lacquer 6 in the partial area 7b 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 10, in the present case a "silver" mirror layer 10.
• the resulting layer structure is provided with a transparent intermediate layer or primer layer 11 (e.g., a transparent UV varnish).
• a transparent intermediate layer or primer layer 11 e.g., a transparent UV varnish
• a transparent adhesive layer 12 eg a heat seal adhesive
• the banknote 1 shown in FIG. 12 in the case where the security element 13 shown in FIG. 7 is applied to the front side of the banknote 1 by means of the adhesive layer 12, exhibits the following optical effects:
• the "silver" mirror layer 10 is the viewer both in the consideration of the bill 1 from the front, as well as in the
• the motif shows e.g. interesting three-dimensional arch effects.
• the transparent recess shown in FIG. 7 between the thin-film element 9 and the "silver" mirror layer 10 can be seen by the observer in the form of a transparent third motif.
• the banknote 1 shown in FIG. 12 has the advantage that the sensitive
• Thin-film element 9 are protected both by the carrier 5, as well as by the banknote substrate of the banknote 1. Furthermore, Thin-film element 9 are protected both by the carrier 5, as well as by the banknote substrate of the banknote 1. Furthermore, Thin-film element 9 are protected both by the carrier 5, as well as by the banknote substrate of the banknote 1. Furthermore,
• design variants can be implemented in which e.g. that shown in FIG.
• Reflection layer 10 and the thin-film element 9 at a very close distance or even in abutment against each other.
• the Reflection layer 10 are produced in the form of a filigree font or a filigree pattern.
• FIG. 8 shows a security element according to the invention in accordance with a second exemplary embodiment.
• the carrier 5 in the form of a transparent plastic film, e.g. a PET film, has an embossing lacquer 6.
• the carrier 5 in the form of a transparent plastic film, e.g. a PET film, has an embossing lacquer 6.
• the relief structure (i.e., the surface) of the embossing lacquer 6 contains e.g. a
• the middle region of the embossing lacquer 6 is printed with the 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 10, in the present case a "silver" mirror layer 10.
• the embossing lacquer 6, which is partially printed with metal pigments, is provided with a multi-layered thin-film element 9 with a color-shift effect
• Such thin-film element 9 has a semitransparent absorber layer 9a (eg Cr), a dielectric
• Spacer layer 9b eg SiO 2
• a reflective layer 9c eg AI
• the layer structure is provided with a transparent intermediate layer or primer layer 11 (eg a transparent UV lacquer) and a transparent adhesive layer 12 (eg a
• the banknote 1 shown in FIG. 12 in the case where the security element 14 shown in FIG. 8 is applied to the front side of the banknote 1 by means of the adhesive layer 12, exhibits the following optical effects:
• the microstructured "silver" mirror layer 10 is perceived by the viewer when viewing the banknote 1 from the front in the form of a certain motif (e.g., the motif 4 in Fig. 1.)
• a certain motif e.g., the motif 4 in Fig. 1.
• the motif shows interesting
• the color shift effect is perceived by the viewer when looking at the banknote 1 from the front in the form of a background surrounding the particular subject (e.g., the subject 4 in Figure 1). Yes after
• Embodiment of the microstructure shows the thin-film element 9, e.g.
• the banknote 1 shown in FIG. 12 in the case where the security element 14 shown in FIG. 8 is applied to the front side of the banknote 1 by means of the adhesive layer 12, has the advantage that the sensitive, printing-technically obtained reflective layer 10 and the colored one
• Thin-film element 9 are protected both by the carrier 5, as well as by the banknote substrate of the banknote 1. Furthermore, Thin-film element 9 are protected both by the carrier 5, as well as by the banknote substrate of the banknote 1. Furthermore, Thin-film element 9 are protected both by the carrier 5, as well as by the banknote substrate of the banknote 1. Furthermore,
• design variants can be implemented in which e.g. that shown in FIG.
• Reflection layer 10 is in the form of a filigree font or a filigree pattern.
• FIGS 9 to 11 show the preparation of an inventive
• a carrier 5 is in the form of a transparent
• Plastic film e.g. a PET film, provided with an embossing 6.
• the relief structure (i.e., the surface) of the embossing lacquer 6 has e.g. a
• the embossing lacquer 6 is printed in a specific subarea with a specific printing ink, on the one hand the platelet-shaped metal pigments known from WO 2005/051675 A2
• transparent intermediate layer or primer layer 11 e.g., a transparent UV varnish
• transparent adhesive layer 12 e.g.
• the banknote 1 shown in FIG. 12 shows, in the case where the security element 16 shown in FIG.
• the "silver" mirror layer 15a is perceived by the viewer when looking at the banknote 1 from the front in the form of a silver motif (eg the motif 4 in Figure 1.) After designing the microstructure, the silver motif shows, for example, interesting three-dimensional arching effects ,
• the color layer 15b is the viewer when looking at the banknote 1 from the back in the form of a colored motif (eg the motif 4 in the figure 1) perceived.
• the colored motif shows, for example, interesting three-dimensional arching effects.
• the banknote 1 shown in FIG. 12 shows, in the case where the security element 16 shown in FIG.
• double layer 15 are protected both by the carrier 5, as well as by the banknote substrate of the banknote 1.
• the production of the double layer 15 by means of printing allows a very register-accurate arrangement. Accordingly, you can
• Design variants are implemented in which e.g. the double layer 15 are produced in the form of a filigree font or a filigree pattern.
• the security elements 13 and 14 shown in Figures 7 and 8 are varied so that instead of the multi-layered thin-film element 9 with color-shift effect (with semi-transparent absorber layer (for example Cr),
• the semitransparent thin film element described in the foregoing description is used, which is useful to a viewer in the art
• a thin film element having two semitransparent mirror layers and a dielectric spacer layer disposed between the two mirror layers.
• a thin-film element which appears gold-colored in incident light and blue in transmitted light, is described in WO 2011/082761 A1.
• Exemplary layer arrangements are, as mentioned earlier in the description: 5 to 15 nm Al / 85 to 250 nm S1O2 / 5 to 15 nm Al, in particular
• a printing ink used contains the known from WO 2005/051675 A2 platelet-shaped metal pigments (in particular Al pigments) and on the other hand, organic dyes in the form of a mixture.
• Metal pigments which are known from WO 2005/051675 A2, uses such platelet-shaped metal pigments, as described in the publications WO 2013/186167 A2, WO 2010/069823 Al and WO 2011/064162 A2.
• Color layer 15b may be used instead of the organic dyes also suitable inorganic colored pigments.
• Security elements and banknotes can be used in all types of security elements, such as security labels, strips and threads on goods and packaging or in the security of documents, ID cards, passports, credit cards, health cards and the like.

Landscapes

• Credit Cards Or The Like (AREA)
• Laminated Bodies (AREA)
• Printing Methods (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=54848527

Family Applications (1)

Country Status (4)

Cited By (9)

Families Citing this family (7)

Citations (3)

Family Cites Families (8)

• 2014
  • 2014-12-09 DE DE102014018204.5A patent/DE102014018204A1/de not_active Withdrawn
• 2015
  • 2015-12-08 EP EP15808107.5A patent/EP3230081B1/de active Active
  • 2015-12-08 CN CN201580064484.9A patent/CN107000463B/zh active Active
  • 2015-12-08 WO PCT/EP2015/002473 patent/WO2016091381A1/de active Application Filing

Patent Citations (3)

Also Published As

Similar Documents

Legal Events