EP3090880A1 - Valuable document substrate and valuable document - Google Patents
Valuable document substrate and valuable document Download PDFInfo
- Publication number
- EP3090880A1 EP3090880A1 EP16000945.2A EP16000945A EP3090880A1 EP 3090880 A1 EP3090880 A1 EP 3090880A1 EP 16000945 A EP16000945 A EP 16000945A EP 3090880 A1 EP3090880 A1 EP 3090880A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- layer
- value
- substrate
- document
- security feature
- 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.)
- Withdrawn
Links
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- 230000005855 radiation Effects 0.000 claims abstract description 49
- 239000000049 pigment Substances 0.000 claims description 45
- 230000000694 effects Effects 0.000 claims description 38
- 239000006096 absorbing agent Substances 0.000 claims description 37
- 229920000307 polymer substrate Polymers 0.000 claims description 28
- 239000000203 mixture Substances 0.000 claims description 20
- 239000004973 liquid crystal related substance Substances 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 9
- 239000006229 carbon black Substances 0.000 claims description 6
- 239000002178 crystalline material Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000004922 lacquer Substances 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 238000001465 metallisation Methods 0.000 claims description 2
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- 239000010410 layer Substances 0.000 description 76
- 239000000976 ink Substances 0.000 description 43
- 239000010408 film Substances 0.000 description 33
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 18
- 238000007650 screen-printing Methods 0.000 description 18
- 239000003086 colorant Substances 0.000 description 10
- 230000004224 protection Effects 0.000 description 10
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- 238000000576 coating method Methods 0.000 description 9
- 239000002131 composite material Substances 0.000 description 8
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- 239000004408 titanium dioxide Substances 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 7
- 239000003973 paint Substances 0.000 description 7
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- 239000007850 fluorescent dye Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
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- 125000006850 spacer group Chemical group 0.000 description 3
- SITYOOWCYAYOKL-UHFFFAOYSA-N 2-[4,6-bis(2,4-dimethylphenyl)-1,3,5-triazin-2-yl]-5-(3-dodecoxy-2-hydroxypropoxy)phenol Chemical compound OC1=CC(OCC(O)COCCCCCCCCCCCC)=CC=C1C1=NC(C=2C(=CC(C)=CC=2)C)=NC(C=2C(=CC(C)=CC=2)C)=N1 SITYOOWCYAYOKL-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
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- 239000004611 light stabiliser Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- UJRDRFZCRQNLJM-UHFFFAOYSA-N methyl 3-[3-(benzotriazol-2-yl)-5-tert-butyl-4-hydroxyphenyl]propanoate Chemical compound CC(C)(C)C1=CC(CCC(=O)OC)=CC(N2N=C3C=CC=CC3=N2)=C1O UJRDRFZCRQNLJM-UHFFFAOYSA-N 0.000 description 2
- 239000010445 mica Substances 0.000 description 2
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- 230000000007 visual effect Effects 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
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- 230000004913 activation Effects 0.000 description 1
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- 238000013475 authorization Methods 0.000 description 1
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- 238000011161 development Methods 0.000 description 1
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- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
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- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000011253 protective coating Substances 0.000 description 1
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Images
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
- B42D25/351—Translucent or partly translucent parts, e.g. windows
-
- 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
Definitions
- the invention relates to a value-document substrate for the production of value documents, in particular of banknotes, and a value document with the value-document substrate.
- Securities or identity documents, or other valuables, such as branded goods are often provided with security elements for the purpose of security, which permit verification of the authenticity of the data carriers and at the same time serve as protection against unauthorized reproduction.
- Security elements with viewing-angle-dependent effects play a special role in the authentication of authenticity since they can not be reproduced even with the most modern copiers.
- the security elements are equipped with optically variable elements that give the viewer a different image impression under different viewing angles and, for example, show a different color or brightness impression and / or another graphic motif depending on the viewing angle.
- the color-shift effect in such thin-film elements is based on viewing angle-dependent interference effects due to multiple reflections in the different sub-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.
- pigment-like thin-film elements or interference pigments are known, which are mixed, for example, a printing ink.
- Such interference pigments typically have a thin film structure that includes a reflective layer, a partially transparent layer, and one or more intervening dielectric spacer layers. These are based, for example, on mica, on SiO 2 or on Al 2 O 3 .
- Such interference layers are referred to as one or more layers according to the number of dielectric layers.
- Pigments such thin film interference layers are known for example under the name Iriodin ® (single layer) or Colorcrypt ® (multi-layer). Printing colors with multi-layer interference layer pigments are also known under the name OVI ®.
- a subgroup of the interference pigments are pigments formed on the basis of a liquid crystal layer with a color shift effect.
- Optically variable elements made of liquid crystal layers are mostly transparent and are known in the art (see for example the WO 2006/034780 A1 ).
- the visual detectability of the color shift effect of a liquid crystal layer can be enhanced by means of a black background, which is produced, for example, by a black color layer as the background.
- compositions with thermochromic pigments are used to produce an optically variable security feature.
- an optical impression is created for the viewer, which differs from the visual impression before being exposed to heat.
- Thermochromic inks based on encapsulated liquid crystals for example, have a first color at room temperature for the viewer on a black background and undergo a color change to a second color when exposed to temperature.
- Leuco-Dyes are colored, e.g. black, and may change color as the temperature increases. In particular, a colored, e.g. black, leuco-dye become colorless.
- thermochromic pigments may have significant sensitivity to UV radiation.
- UV radiation is understood to mean electromagnetic radiation in the wavelength range of less than 380 nm, while the wavelength range from 380 nm to approximately 780 nm is referred to as "visible wavelength range”. Since daylight has some degree of UV radiation in the wavelength range of less than 380 nm, security elements or value documents with UV-sensitive, optically variable colorants are not very lightfast, i. the colorants are not resistant to UV radiation and change e.g. their color.
- UV-A denotes a wavelength range of 380 to 315nm
- UV-B a wavelength range of 315 to 280nm
- UV-C a wavelength range of 280 to 200nm.
- UV absorbers can be incorporated. Since the UV absorber is present statistically distributed in the binder and thus only a fraction of the added UV absorber protects the protected optically variable colorant from UV radiation, it is inevitable to work with high concentrations of the UV absorber. Against this background was in the EP 2 463 344 A1 proposed to protect the UV-sensitive, optically variable colorant in the form of a core-shell particle by means of a UV-radiation-absorbing shell. The encapsulation of the optically variable colorant inevitably leads to a reduction in the effective amount of colorant in the subsequent production of a printing ink, ie when introducing the core-shell particles into a binder matrix.
- a further disadvantage is that the capsule wall for achieving the desired effect, namely a sufficient UV protection, must be sufficiently thick.
- the relatively large particles obtained in this way can no longer be applied to a substrate to be printed by certain printing processes (for example by means of offset printing) in which the layer thickness of the applied printing ink is limited to thin layer thicknesses (eg a maximum of two micrometers). When applying the materials by screen printing, this leads to very high layer thicknesses.
- the invention has for its object to overcome the disadvantages of the prior art.
- the protection against counterfeiting of documents of value which contain UV-sensitive security features should be ensured in the long term.
- a value-document substrate having on the front side a security feature which is sensitive to UV radiation is provided with a color layer which protects the security feature against ultraviolet radiation and is substantially opaque to UV radiation, in particular available by printing technology.
- the value-document substrate itself can be based, for example, on a paper substrate. Paper contains titanium dioxide and is therefore UV absorbing.
- the value-document substrate may further be provided on a (in particular transparent) polymer substrate, a film / paper / film composite substrate (see, for example, US Pat WO 2004/028825 A2 ) or a paper / foil / paper composite substrate (see, for example, US Pat WO 2006/066431 A1 ).
- the central paper layer having a recess to provide in this way a see-through window area in which, for example, the UV-labile security feature can be arranged;
- at least one of the films of the film / paper / film composite substrate can be present in the form of a film substantially impermeable to UV radiation, at least in the area of the recess in the central paper layer.
- the two outer paper layers may each have a recess to provide in this way a see-through window area in which, for example, the UV-labile security feature can be arranged;
- the film of the paper / film / paper composite substrate can be present in the form of a film which is substantially impermeable to UV radiation, at least in the region of the recesses in the paper layers.
- the value-document substrate may be based on a paper substrate which has a continuous recess, wherein the continuous recess on at least one side of the paper substrate is covered by a transparent film (see, for example, US Pat WO 2011/015622 A1 );
- the UV-labile security feature can be arranged in the region of the continuous recess, wherein in this case the transparent film covering the continuous recess is preferably present in the form of a film that is substantially impermeable to UV radiation.
- the value-document substrate is in the form of a polymer substrate which is substantially impermeable to UV radiation at least in a partial region.
- Polymer-based value-document substrates are known in the art.
- the transparent polymer substrate is on both sides with an opaque, titanium dioxide-containing and therefore UV-absorbing Coating layer coated.
- an opaque, titanium dioxide-containing and therefore UV-absorbing Coating layer coated By providing a recess in the opaque layer, a window area visible to the viewer can be created.
- a transparent film substantially impermeable to UV radiation can be obtained, for example, by the addition of special UV absorbers.
- Suitable UV absorbers are, for example, Tinuvin types from BASF, benzotriazoles, nanoscale TiO 2 with titanium (in particular Fe, V and / or Cr) doped titanium oxide, HALS (namely so-called "hindered amine light stabilizers").
- Tinuvines are preferably used as UV absorbers, with Tinuvin 400 and Tinuvin 1130 being particularly preferred.
- Suitable film or polymer substrate are, for example, polyesters, polyolefins (for example PE, PP, BOPP), polyamides or polycarbonates.
- Polyester films in particular polyethylene terephthalate films (PET films), are preferably used.
- the layer thickness of the film is preferably 2 to 100 micrometers, preferably 2 to 20 micrometers.
- UV absorber With a high concentration of the UV absorber within the composition forming the UV-absorbing layer, a film provided therewith can achieve the effect of a cut-off filter, so that the UV protection is complete at a certain wavelength. Depending on the UV absorber used, the film has a yellowish coloration if the UV absorber concentrations are too high. Furthermore, the UV absorber can also be introduced into the film in the step of producing the film, for example by means of extrusion.
- the term "UV radiation substantially impermeable film" is to be understood that the electromagnetic radiation in the wavelength range of less than 380 nm in the transmission in a Extent of at least 40%, preferably at least 80%, particularly preferably at least 90% is reduced.
- the ultraviolet radiation protective, UV blocking, substantially impermeable ink layer may be e.g. based on a composition with special UV absorbers. Tinuvines are preferably used as UV absorbers, with Tinuvin 400 and Tinuvin 1130 being particularly preferred. In this case, the layer obtained by printing is preferably transparent.
- the colorant layer which protects the security feature from ultraviolet radiation and which is substantially opaque to UV radiation can, according to an alternative, be a dark, in particular black, color layer.
- the layer is preferably based on one or more of the following elements: carbon black; Magnetic pigments (e.g., pigments based on a hard iron, a soft iron, or a carbonyl iron); a mixture containing a red colored pigment, a yellow colored pigment, a blue colored pigment and a UV absorber; a mixture containing a black leuco dye and a UV absorber.
- the ultraviolet radiation protective, UV blocking, substantially impermeable ink layer may, according to a further alternative, comprise a covering, UV absorbing coating based on e.g. Be titanium dioxide.
- ink layer substantially impermeable to UV radiation is understood to mean that the electromagnetic radiation in the wavelength range of less than 380 nm in the transmission in a Extent of at least 40%, preferably at least 80%, particularly preferably at least 90% is reduced.
- the value document according to the invention can be a banknote, in particular a paper banknote, a polymer banknote or a film composite banknote, a share, a bond, a certificate, a coupon, a check, a high-quality admission ticket, but also an identity card, such as a banknote Credit card, a bank card, a cash card, an authorization card, an identity card or pass personalization page.
- a banknote in particular a paper banknote, a polymer banknote or a film composite banknote, a share, a bond, a certificate, a coupon, a check, a high-quality admission ticket
- an identity card such as a banknote Credit card, a bank card, a cash card, an authorization card, an identity card or pass personalization page.
- FIG. 1 shows a valuable document substrate according to the invention.
- the substrate used is a polymer substrate 8 with opaque regions 8a and a transparent region 8b.
- a 90 micron thick BOPP film is used, which has a coating on the basis of a UV absorber-containing composition to increase the UV-opacity especially in the transparent area 8b on its front and / or back (in the figure is the before UV protective coating not shown).
- the UV absorbing coating can also be used at the same time serve as a primer for ink acceptance or adhesion of one or more additional print layers.
- the polymer substrate may also contain UV absorbers extruded into the polymer.
- the UV-absorbing coating may also contain antistatics in order to avoid sticking together of several substrates.
- the rear side of the polymer substrate 8 is printed in the (also partially) transparent subregion 8b and in the covering region 8a with a thermochromic screen printing ink 2 based on encapsulated liquid crystals.
- the thermochromic screen printing ink 2 is sensitive to UV radiation.
- the area of the thermochromic screen printing ink 2 (in order to protect also the back of the thermochromic paint 2) is at least partially overprinted with a black, soot-based ink 5.
- Carbon black is a broad-spectrum absorber with high light resistance, covering the spectrum from UV through VIS to IR.
- the black color 5 is also overprinted with a transparent effect color 4 because of the better attractiveness.
- the layer 4 may be based, for example, on interference pigments or on a crosslinked liquid crystal layer with a color shift effect. When looking at the back of the bill, the color shift effect of the transparent layer 4 due to the black background 5 becomes visible.
- the thermochromic ink 2 is in the non-activated state, ie at room temperature, transparent (ie transparent on black background), so that the central, recessed area of the black layer 5 appears transparent in transmitted light when viewing the front of the banknote. In the region of the recess 9, the thermochromic paint 2 is always transparent. When the temperature increases, the color of the thermochromic screen printing ink 2 changes, for example, to a blue-green. This color change is when looking at the front of the banknote, ie through the transparent portion 8b of the polymer substrate, particularly appealing.
- an infrared-transparent black based on a yellow, a red and a blue pigment can also be used.
- the effect color printed above the black layer contains a blended UV absorber, or the effect pigment itself already has UV-absorbing properties.
- an iriodin pigment is used as the effect pigment.
- Such an iriodin pigment is based on a low refractive index support substrate, e.g. Mica or silica, or the carrier substrate is a thin glass plate.
- the support is coated with several layers of a high refractive index material, such as titanium dioxide, ferric oxide, zirconium oxide and / or mixed oxides. If titanium dioxide is used as the high-index material, then the UV-absorbing effect already results with this material.
- the black coating 5 is required to make the hue of the liquid crystal-based thermochromic color visible.
- FIG. 2 shows a further inventive value-document substrate.
- the substrate used is a polymer substrate 8 with opaque regions 8a and a transparent region 8b.
- the polymer substrate used is a 90 .mu.m thick BOPP film which has a coating based on a UV absorber-containing composition to increase the UV impermeability, in particular in the transparent region 8b on its front and / or rear side.
- the rear side of the polymer substrate 8 is partially printed in the transparent subregion 8b and covering region 8a with a thermochromic screen printing ink 2a based on encapsulated liquid crystals.
- Thermochromic screen printing ink 2a is sensitive to UV radiation.
- the polymer substrate 8 Adjacent to the region of the thermochromic screen printing ink 2a, the polymer substrate 8 is additionally printed with a non-thermochromic ink 2b which has the same or a similar color tone as the thermochromic ink 2a in the activated state at elevated temperature.
- the region of the thermochromic screen printing ink 2a is at least partially overprinted with a black, soot-based ink 5 on the back side.
- the black color 5 is additionally overprinted with a transparent effect color 4 to improve the optical effect.
- the layer 4 may be based for example on interference pigments or on a liquid crystal layer with a color shift effect. When looking at the back of the bill, the color shift effect of the transparent layer 4 due to the black background 5 becomes visible.
- thermochromic ink 2a is in the non-activated state, ie at room temperature, eg transparent.
- the central, recessed area 9 of the black layer 5 then always appears transparent in the transmitted light when viewing the front of the banknote.
- the color of the thermochromic screen printing ink 2a changes to a blue-green against a black background. This color change is particularly appealing when viewing the front of the banknote, ie, through the transparent portion 8b of the polymer substrate.
- thermochromic ink layer 2b which has the same or a similar hue as the thermochromic ink 2a in the activated state at elevated temperature, a supplementary information 2a to the non-thermochromic information 2b visually noticeable when the temperature increases.
- FIG. 3 shows a further inventive value-document substrate.
- the substrate used is a polymer substrate 8 with opaque regions 8a and a transparent area 8b.
- the polymer substrate used is a 90 .mu.m thick BOPP film which has a coating based on a UV absorber-containing composition to increase the UV impermeability, in particular in the transparent region 8b on its front and / or rear side.
- the front side of the polymer substrate 8 is printed in the transparent subregion 8b with two thermochromic screen printing inks 2a, 2b, each based on encapsulated liquid crystals.
- thermochromic screen printing inks 2a, 2b are colorless at room temperature, wherein the thermochromic paint 2b at a temperature of 25 ° C and the thermochromic paint 2a are activated at a temperature of 35 ° C, ie change their color.
- the thermochromic screen printing inks 2a, 2b are sensitive to UV radiation.
- the region of the thermochromic screen printing inks 2a, 2b on the back is at least partially overprinted with a black color 5 based on carbon black.
- the black color 5 is additionally overprinted with a transparent effect color 4 to improve the optical effect.
- the layer 4 may be based for example on interference pigments or on a liquid crystal layer with a color shift effect. When viewing the front side of the banknote, the color shift effect of the transparent layer 4 becomes visible due to the black background 5.
- FIG. 4 shows a further inventive value-document substrate.
- the substrate used is a polymer substrate 8 with opaque regions 8a and a transparent region 8b.
- the polymer substrate used is a 90 .mu.m thick BOPP film which has a coating based on a UV absorber-containing composition to increase the UV impermeability, in particular in the transparent region 8b on its front and / or rear side.
- the front side of the polymer substrate 8 is in the transparent portion 8b with a thermochromic, encapsulated liquid crystals based screen printing ink 2a printed.
- the thermochromic screen printing ink 2a is colorless at a temperature of less than 25 ° C and has a release temperature or activation temperature of 25 ° C and is sensitive to UV radiation.
- the polymer substrate 8 Adjacent to the region of the thermochromic screen printing ink 2a, the polymer substrate 8 is additionally printed with a non-thermochromic ink 2b which has the same or a similar color tone as the thermochromic ink 2a in the activated state at elevated temperature.
- a non-thermochromic ink 2b Adjacent to the region of the thermochromic screen printing ink 2a, the polymer substrate 8 is additionally printed with a non-thermochromic ink 2b which has the same or a similar color tone as the thermochromic ink 2a in the activated state at elevated temperature.
- the area of the thermochromic screen printing ink 2a is partially overprinted with a black, soot-based paint 5a.
- a thermochromic black (and in particular UV absorber-containing) ink 5b based on so-called leuco-dyes is additionally used.
- the black, thermochromic paint 5b is black at room temperature and has a release temperature of 35 ° C.
- the color becomes colorless when the temperature increases, so that the thermochromic liquid-crystalline color shows no effect.
- the black color 5a, 5b is additionally overprinted with a transparent effect color 4 to improve the optical effect.
- the layer 4 may be based for example on interference pigments or on a liquid crystal layer with a color shift effect. When viewing the back of the banknote, the color shift effect of the transparent layer 4 becomes visible due to the black background 5a, 5b.
- thermochromic color layers 2a, 5b visually complementary information to the non-thermochromic information 2b, 5a recognizable, the two visually complementary information 2a, 5b due to the different Tripping temperatures of the thermochromic colors used graded depending on the ambient temperature occur.
- FIG. 5 shows a further inventive value-document substrate.
- the substrate used is a polymer substrate 8 with opaque regions 8a and a transparent region 8b.
- the polymer substrate used is a 90 .mu.m thick BOPP film which has a coating based on a UV absorber-containing composition to increase the UV impermeability, in particular in the transparent region 8b on its front and / or rear side.
- the front side of the polymer substrate 8 is printed in the transparent portion 8b with a fluorescent dye 2c with sensitivity in the UV-B range and / or UV-C range.
- the fluorescent dye 2c is excitable in the UV-A range.
- the area of the color 2c is printed with a UV broadband protection 10.
- the UV broadband protection 10 is based, for example, on a white or colored pigment pigmented with titanium dioxide.
- the UV broadband protection protects against light in the UV-A, in the UV-B and UV-C range.
- the substrate is in the region 8b such that it protects against UV radiation in the UV-B and UV-C range, ie absorbs such UV radiation.
- the UV-A light is transmitted though.
- an excitation of the fluorescent dye 2c can take place through the layer 8b.
- an effect color based on a particular interference pigment is applied, which already has a UV-absorbing effect due to the presence of a high-index titanium dioxide-based layer. If the fluorescent color 2c is transparent, this effect color can be verified by placing it on a black background from both sides of the substrate. Because of the UV absorbing effect of the interference pigment, the luminescence can only be well verified from one substrate side.
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- Credit Cards Or The Like (AREA)
- Laminated Bodies (AREA)
- Inspection Of Paper Currency And Valuable Securities (AREA)
Abstract
Die Erfindung betrifft ein Wertdokument-Substrat zur Herstellung von Wertdokumenten, insbesondere von Banknoten, mit einer Vorderseite und einer Rückseite, wobei die Vorderseite des Wertdokument-Substrats in einem Teilbereich ein gegenüber UV-Strahlung empfindliches Sicherheitsmerkmal und eine das gegenüber LJV-Strahlung empfindliche Sicherheitsmerkmal schützende, für LTV-Strahlung im Wesentlichen undurchlässige Farbschicht aufweist, wobei das Wertdokument-Substrat zumindest im Teilbereich des gegenüber UV-Strahlung empfindlichen Sicherheitsmerkmals transparent und für UV-Strahlung im Wesentlichen undurchlässig ist.The invention relates to a value-document substrate for producing documents of value, in particular of banknotes, having a front side and a back side, the front side of the document of value substrate protecting a UV-sensitive security feature and a security feature which is sensitive to LJV radiation in a subarea , ink layer substantially impermeable to LTV radiation, wherein the document of value substrate is transparent at least in the partial area of the UV-sensitive security feature and substantially impermeable to UV radiation.
Description
Die Erfindung betrifft ein Wertdokument-Substrat zur Herstellung von Wertdokumenten, insbesondere von Banknoten, und ein Wertdokument mit dem Wertdokument-Substrat.The invention relates to a value-document substrate for the production of value documents, in particular of banknotes, and a value document with the value-document substrate.
Wert- bzw. Ausweisdokumente, oder andere Wertgegenstände, wie etwa Markenartikel, werden zur Absicherung oft mit Sicherheitselementen versehen, die eine Überprüfung der Echtheit der Datenträger gestatten und die zugleich als Schutz vor unerlaubter Reproduktion dienen. Eine besondere Rolle bei der Echtheitsabsicherung spielen Sicherheitselemente mit betrachtungswinkelabhängigen Effekten, da diese selbst mit modernsten Kopiergeräten nicht reproduziert werden können. Die Sicherheitselemente werden dabei mit optisch variablen Elementen ausgestattet, die dem Betrachter unter unterschiedlichen Betrachtungswinkeln einen unterschiedlichen Bildeindruck vermitteln und beispielsweise je nach Betrachtungswinkel einen anderen Farb- oder Helligkeitseindruck und/ oder ein anderes graphisches Motiv zeigen.Securities or identity documents, or other valuables, such as branded goods, are often provided with security elements for the purpose of security, which permit verification of the authenticity of the data carriers and at the same time serve as protection against unauthorized reproduction. Security elements with viewing-angle-dependent effects play a special role in the authentication of authenticity since they can not be reproduced even with the most modern copiers. The security elements are equipped with optically variable elements that give the viewer a different image impression under different viewing angles and, for example, show a different color or brightness impression and / or another graphic motif depending on the viewing angle.
In diesem Zusammenhang ist bekannt, Sicherheitselemente mit mehrschichtigen Dünnschichtelementen einzusetzen, deren Farbeindruck sich für den Betrachter mit dem Betrachtungswinkel ändert (im Folgenden als Farbkippeffekt bezeichnet). Der Farbkippeffekt beruht bei solchen Dünnschichtelementen auf betrachtungswinkelabhängigen Interferenzeffekten durch Mehrfachreflexionen in den verschiedenen Teilschichten des Elements. Der Wegunterschied des an den verschiedenen Schichten reflektierten Lichts hängt einerseits von der optischen Dicke einer dielektrischen Abstandsschicht ab, die den Abstand zwischen einer semitransparenten Absorberschicht und einer Reflexionsschicht festlegt, und variiert andererseits mit dem jeweiligen Betrachtungswinkel. Da der Wegunterschied in der Größenordnung der Wellenlänge des sichtbaren Lichts liegt, ergibt sich aufgrund von Auslöschung und Verstärkung bestimmter Wellenlängen ein winkelabhängiger Farbeindruck für den Betrachter. Durch eine geeignete Wahl von Material und Dicke der dielektrischen Abstandsschicht können eine Vielzahl unterschiedlicher Farbkippeffekte gestaltet werden.In this context, it is known to use security elements with multilayer thin-film elements whose color impression changes with the viewing angle for the viewer (referred to below as the color-shift effect). The color shift effect in such thin-film elements is based on viewing angle-dependent interference effects due to multiple reflections in the different sub-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. By a suitable choice of material and thickness of the dielectric spacer layer a variety of different color shift effects can be designed.
Darüber hinaus sind pigmentförmige Dünnschichtelemente bzw. Interferenzpigmente bekannt, die z.B. einer Druckfarbe beigemischt werden. Solche Interferenzpigmente weisen typischerweise einen Dünnschichtaufbau auf, der eine Reflexionsschicht, eine teildurchlässige Schicht und eine oder mehrere dazwischen liegende dielektrische Abstandsschichten umfasst. Diese basieren beispielsweise auf Glimmer, auf SiO2 oder auf Al2O3. Solche Interferenzschichten werden entsprechend der Anzahl von dielektrischen Schichten als ein- oder mehrschichtig bezeichnet. Pigmente solcher Dünnschicht-Interferenzschichten sind beispielsweise unter dem Namen Iriodin® (einschichtig) oder Colorcrypt® (mehrschichtig) bekannt. Druckfarben mit mehrschichtigen Interferenzschichtpigmenten sind ferner unter dem Namen OVI® bekannt.In addition, pigment-like thin-film elements or interference pigments are known, which are mixed, for example, a printing ink. Such interference pigments typically have a thin film structure that includes a reflective layer, a partially transparent layer, and one or more intervening dielectric spacer layers. These are based, for example, on mica, on SiO 2 or on Al 2 O 3 . Such interference layers are referred to as one or more layers according to the number of dielectric layers. Pigments such thin film interference layers are known for example under the name Iriodin ® (single layer) or Colorcrypt ® (multi-layer). Printing colors with multi-layer interference layer pigments are also known under the name OVI ®.
Eine Untergruppe der Interferenzpigmente sind Pigmente, die auf Basis einer Flüssigkristall-Schicht mit Farbkippeffekt gebildet sind. Optisch variable Elemente aus Flüssigkristall-Schichten sind zumeist transparent und sind im Stand der Technik bekannt (siehe zum Beispiel die
Des Weiteren finden Zusammensetzungen mit thermochromen Pigmenten zur Erzeugung eines optisch variablen Sicherheitsmerkmals Anwendung. Beim Beaufschlagen eines solchen Sicherheitsmerkmals mit Wärme wird für den Betrachter ein optischer Eindruck hervorgerufen, der sich vom optischen Eindruck vor dem Beaufschlagen mit Wärme unterscheidet. Thermochrome Farben auf Basis von verkapselten Flüssigkristallen beispielsweise haben für den Betrachter auf einem schwarzen Untergrund bei Raumtemperatur eine erste Farbe und gehen bei Temperatur-Beaufschlagung einen Farbwechsel zu einer zweiten Farbe ein., Leuco-Dyes sind farbig, z.B. schwarz, und können bei Temperaturerhöhung eine Farbänderung aufweisen. Insbesondere kann ein farbiger, z.B. schwarzer, Leuco-Dye farblos werden.Furthermore, compositions with thermochromic pigments are used to produce an optically variable security feature. When heat is applied to such a security feature, an optical impression is created for the viewer, which differs from the visual impression before being exposed to heat. Thermochromic inks based on encapsulated liquid crystals, for example, have a first color at room temperature for the viewer on a black background and undergo a color change to a second color when exposed to temperature. Leuco-Dyes are colored, e.g. black, and may change color as the temperature increases. In particular, a colored, e.g. black, leuco-dye become colorless.
Insbesondere die thermochromen Pigmente können eine erhebliche Empfindlichkeit gegenüber UV-Strahlung aufweisen. Nachfolgend wird unter "UV-Strahlung" elektromagnetische Strahlung im Wellenlängenbereich von weniger als 380 nm verstanden, während der Wellenlängenbereich von 380 nm bis ca. 780 nm als "sichtbarer Wellenlängenbereich" bezeichnet wird. Da Tageslicht in gewissem Ausmaß UV-Strahlung im Wellenlängenbereich von weniger als 380 nm aufweist, sind Sicherheitselemente oder Wertdokument mit gegenüber UV-Strahlung empfindlichen, optisch variablen Farbmitteln nicht besonders lichtecht, d.h. die Farbmittel sind gegenüber UV-Strahlung nicht beständig und verändern z.B. ihre Farbe.In particular, the thermochromic pigments may have significant sensitivity to UV radiation. In the following, "UV radiation" is understood to mean electromagnetic radiation in the wavelength range of less than 380 nm, while the wavelength range from 380 nm to approximately 780 nm is referred to as "visible wavelength range". Since daylight has some degree of UV radiation in the wavelength range of less than 380 nm, security elements or value documents with UV-sensitive, optically variable colorants are not very lightfast, i. the colorants are not resistant to UV radiation and change e.g. their color.
In der Literatur wird zwischen "UV-A", "UV-B" und "UV-C" unterschieden. UV-A bezeichnet einen Wellenlängenbereich von 380 bis 315nm, UV-B einen Wellenlängenbereich von 315 bis 280nm und UV-C einen Wellenlängenbereich von 280 bis 200nm.In the literature, a distinction is made between "UV-A", "UV-B" and "UV-C". UV-A denotes a wavelength range of 380 to 315nm, UV-B a wavelength range of 315 to 280nm and UV-C a wavelength range of 280 to 200nm.
Aufgrund der besseren Beständigkeit und der verfahrenstechnischen Vorteile besteht ein Trend zu UV-trocknenden Farben und Lacken. Das bedeutet, dass gegen UV-Strahlung sensible Materialien auch durch den Einsatz von UV-Trocknern in den Druckmaschinen eine dauerhafte Beschädigung in ihrer Funktionalität erfahren.Due to the better durability and process advantages, there is a trend towards UV-drying paints and varnishes. This means that materials which are sensitive to UV radiation also experience permanent damage in their functionality through the use of UV dryers in the printing presses.
Zur Verbesserung der Lichtechtheit von Zusammensetzungen mit gegenüber UV-Strahlung empfindlichen, optisch variablen Farbmitteln können UV-Absorber beigemengt werden. Da der UV-Absorber statistisch verteilt im Bindemittel vorliegt und somit nur ein Bruchteil des beigemengten UV-Absorbers das zu schützende optisch variable Farbmittel vor UV-Strahlung schützt, muss zwangsläufig mit hohen Konzentrationen des UV-Absorbers gearbeitet werden. Vor diesem Hintergrund wurde in der
Der Erfindung liegt die Aufgabe zugrunde, die Nachteile des Standes der Technik zu beheben. Insbesondere soll der Fälschungsschutz von Wertdokumenten, die gegenüber UV-Strahlung empfindliche Sicherheitsmerkmale enthalten, langfristig sichergestellt werden.The invention has for its object to overcome the disadvantages of the prior art. In particular, the protection against counterfeiting of documents of value which contain UV-sensitive security features should be ensured in the long term.
Diese Aufgabe wird durch die in den unabhängigen Ansprüchen definierten Merkmalskombinationen gelöst. Weiterbildungen der Erfindung sind Gegenstand der Unteransprüche.This object is achieved by the feature combinations defined in the independent claims. Further developments of the invention are the subject of the dependent claims.
- 1. (Erster Aspekt der Erfindung) Wertdokument-Substrat zur Herstellung von Wertdokumenten, insbesondere von Banknoten, mit einer ersten Seite (bzw. Vorderseite) und einer gegenüberliegenden zweiten Seite (bzw.Rückseite), wobei die erste Seite des Wertdokument-Substrats in einem Teilbereich ein gegenüber UV-Strahlung empfindliches Sicherheitsmerkmal und eine das gegenüber UV-Strahlung empfindliche Sicherheitsmerkmal schützende, für UV-Strahlung im Wesentlichen undurchlässige Farbschicht aufweist, wobei das Wertdokument-Substrat zumindest im Teilbereich des gegenüber UV-Strahlung empfindlichen Sicherheitsmerkmals transparent und für UV-Strahlung im Wesentlichen undurchlässig ist. Mit "transparent" ist im VIS-Bereich transparent gemeint.1. (First aspect of the invention) value document substrate for producing value documents, in particular banknotes, having a first side (or front side) and an opposite second side (or back side), wherein the first side of the value document substrate in a Part of a UV-sensitive security feature and the UV-sensitive security feature protecting, substantially impermeable to UV radiation ink layer, wherein the document of value substrate transparent at least in the partial area of sensitive to UV radiation security feature and UV radiation is essentially impermeable. "Transparent" means transparent in the VIS area.
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2. (Bevorzugte Ausgestaltung) Wertdokument-Substrat nach Absatz 1, wobei die das gegenüber UV-Strahlung empfindliche Sicherheitsmerkmal schützende Farbschicht von den folgenden Alternativen gewählt ist:
- a) eine auf Ruß basierende Farbschicht;
- b) eine auf einem Gemisch basierende Farbschicht, wobei das Gemisch ein rotes Buntpigment, ein gelbes Buntpigment, ein blaues Buntpigment und einen UV-Absorber oder ein UV-absorbierendes Effektpigment enthält (z.B. eignen sich jeweils die Pigmente Yellow 13, Blue 15:3 und Red 146 als gelbes, blaues bzw. rotes Buntpigment);
- c) eine auf einem Gemisch basierende Farbschicht, wobei das Gemisch einen farbigen, z.B. schwarzen, Leucodye und einen UV-Absorber enthält;
- d) eine Farbschicht, die in einem Teilbereich gemäß den obigen Alternativen a) oder b) definiert ist, und in einem weiteren Teilbereich gemäß der obigen Alternative c) definiert ist.
Gemäß einer Variante beruht die in der oben beschriebenen Alternative b) beschriebene Farbschicht auf einem Gemisch, das ein rotes Buntpigment, ein gelbes Buntpigment, ein blaues Buntpigment und ein UV-absorbierendes Effektpigment enthält. Das UV-absorbierende Effektpigment ist aufgrund seines Aufbaus oder infolgedessen, dass ein UV-Absorber beigemischt wird, UV-absorbierend (z.B. eignet sich ein Interferenzpigment, das eine hochbrechende, auf Titandioxid basierende Schicht enthält und auf diese Weise eine UV-absorbierende Wirkung aufweist).2. (Preferred embodiment) value-document substrate according to paragraph 1, wherein the color layer protecting the UV-sensitive security feature is selected from the following alternatives:- a) a color layer based on carbon black;
- b) a mixture based on a color layer, wherein the mixture of a red colored pigment, a yellow colored pigment, a blue colored pigment and contains a UV absorber or a UV-absorbing effect pigment (for example, the pigments Yellow 13, Blue 15: 3 and Red 146 are each suitable as yellow, blue or red colored pigment);
- c) a mixture-based ink layer, the mixture containing a colored, eg, black, leucoodye and a UV absorber;
- d) a color layer which is defined in a partial region according to the above alternatives a) or b), and in a further partial region according to the above alternative c) is defined.
According to one variant, the ink layer described in the above-described alternative b) is based on a mixture which contains a red colored pigment, a yellow colored pigment, a blue colored pigment and a UV-absorbing effect pigment. The UV-absorbing effect pigment is UV-absorbing due to its structure or as a result of admixing a UV absorber (eg, an interference pigment containing a high refractive index titanium dioxide-based layer and thus having a UV-absorbing effect) , -
3. (Bevorzugte Ausgestaltung) Wertdokument-Substrat nach Absatz 1 oder 2, wobei das Wertdokument-Substrat ein Polymer-Substrat ist, das zumindest im Teilbereich des gegenüber UV-Strahlung empfindlichen Sicherheitsmerkmals UV-Absorber aufweist.3. (Preferred Embodiment) Value-document substrate according to
paragraph 1 or 2, wherein the value-document substrate is a polymer substrate which has UV absorbers at least in the partial area of the UV-sensitive security feature. -
4. (Bevorzugte Ausgestaltung) Wertdokument-Substrat nach Absatz 1 oder 2, wobei das Wertdokument-Substrat auf Basis eines Papier-Substrats gebildet ist, das zumindest im Teilbereich des gegenüber UV-Strahlung empfindlichen Sicherheitsmerkmals eine Aussparung in der Papierschicht aufweist, wobei das Wertdokument-Substrat zumindest im Bereich der Aussparung ein im VIS-Bereich transparentes, UV-Absorber aufweisendes Polymer-Substrat enthält.4. (Preferred embodiment) value-document substrate according to
paragraph 1 or 2, wherein the document of value substrate is formed on the basis of a paper substrate, which has a recess in the paper layer at least in the partial area of sensitive to UV radiation security feature, wherein the document of value At least in the region of the recess, the substrate contains a polymer substrate that is transparent in the VIS range and has a UV absorber. -
5. (Bevorzugte Ausgestaltung) Wertdokument-Substrat nach einem der Absätze 1 bis 4, wobei das gegenüber UV-Strahlung empfindliche Sicherheitsmerkmal von den folgenden Alternativen gewählt ist:
- a) ein auf einer thermochromen Farbe basierendes Sicherheitsmerkmal, wobei die thermochrome Farbe bevorzugt auf einem Leuco-Dye oder einem flüssigkristallinen Material, weiter bevorzugt auf flüssigkristallines Material enthaltenden Mikrokapseln beruht;
- b) ein auf einem organischen Lumineszenzstoff basierendes Sicherheitsmerkmal;
- c) photochromes Material (z.B. photochrome organische Farbstoffe; Bacteriorhodopsin)
- a) a security feature based on a thermochromic ink, wherein the thermochromic ink is preferably based on a leuco dye or a liquid crystalline material, more preferably microcapsules containing liquid crystal material;
- b) an organic luminescent-based security feature;
- c) photochromic material (eg photochromic organic dyes, bacteriorhodopsin)
- 6. (Bevorzugte Ausgestaltung) Wertdokument-Substrat nach einem der Absätze 1 bis 5, wobei das gegenüber UV-Strahlung empfindliche Sicherheitsmerkmal zusätzlich zu der das Sicherheitsmerkmal schützenden, für UV-Strahlung im Wesentlichen undurchlässigen Farbschicht eine transparente oder transluzente optisch variable Schicht aufweist, die insbesondere von der Gruppe bestehend aus einer Flüssigkristallschicht mit Farbkippeffekt, einer Hologramm-Schicht und einer Effektpigment-Schicht gewählt ist.6. (Preferred embodiment) value-document substrate according to any one of paragraphs 1 to 5, wherein the sensitive to UV radiation security feature in addition to the security feature protecting, substantially impermeable to UV radiation ink layer has a transparent or translucent optically variable layer, the in particular, selected from the group consisting of a liquid crystal layer having a color shift effect, a hologram layer and an effect pigment layer.
- 7. (Bevorzugte Ausgestaltung) Wertdokument-Substrat nach einem der Absätze 1 bis 5, wobei das gegenüber UV-Strahlung empfindliche Sicherheitsmerkmal zusätzlich zu der das Sicherheitsmerkmal schützenden, für UV-Strahlung im Wesentlichen undurchlässigen Farbschicht eine Folie oder eine Lackschicht mit einem diffraktiven Element oder eine Metallisierung enthält.7. (Preferred embodiment) value-document substrate according to any one of paragraphs 1 to 5, wherein the vulnerable to UV radiation security feature in addition to the security feature protecting, substantially impermeable to UV radiation ink layer a film or a lacquer layer with a diffractive element or contains a metallization.
- 8. (Zweiter Aspekt der Erfindung) Wertdokument, insbesondere eine Banknote, umfassend ein Wertdokument-Substrat nach einem der Absätze 1 bis 7.8. (Second aspect of the invention) value document, in particular a banknote, comprising a value-document substrate according to one of the paragraphs 1 to 7.
Erfindungsgemäß wird vorgesehen, ein Wertdokument-Substrat, das auf der Vorderseite ein gegenüber UV-Strahlung empfindliches Sicherheitsmerkmal aufweist, mit einer das Sicherheitsmerkmal gegenüber UV-Strahlung schützenden, für UV-Strahlung im Wesentlichen undurchlässigen, insbesondere drucktechnisch erhältlichen Farbschicht auszustatten. Das Wertdokument-Substrat selbst kann z.B. auf einem Papier-Substrat beruhen. Papier enthält Titandioxid und ist folglich UV-absorbierend. Das Wertdokument-Substrat kann des Weiteren auf einem (insbesondere transparenten) Polymer-Substrat, einem Folie/Papier/Folie-Verbundsubstrat (siehe z.B. die
Auf Polymer basierende Wertdokument-Substrate sind im Stand der Technik bekannt. Üblicherweise ist hierbei das transparente Polymersubstrat beidseitig mit einer opaken, Titandioxid enthaltenden und daher UVabsorbierenden Farbannahmeschicht beschichtet. Durch Bereitstellen einer Aussparung in der opaken Schicht kann ein für den Betrachter sichtbarer Fensterbereich erzeugt werden. Eine für UV-Strahlung im Wesentlichen undurchlässige, transparente Folie kann z.B. durch den Zusatz spezieller UV-Absorber erhalten werden. Als UV-Absorber eignen sich z.B. Tinuvin-Typen der Firma BASF, Benzotriazole, nanoskaliges TiO2 mit Metall (insbesondere Fe, V und/ oder Cr) dotiertes Titanoxid, HALS (nämlich sogenannte "hindered amine light stabilizers"). Vorzugsweise werden Tinuvine als UV-Absorber eingesetzt, wobei Tinuvin 400 und Tinuvin 1130 besonders bevorzugt sind. Als Folie bzw. Polymer-Substrat eignen sich z.B. Polyester, Polyolefine (z.B. PE, PP, BOPP), Polyamide oder Polycarbonate. Polyester-Folien, insbesondere Polyethylenterephthalat-Folien (PET-Folien), werden bevorzugt eingesetzt. Die Schichtdicke der Folie beträgt bevorzugt 2 bis 100 Mikrometer, bevorzugt 2 bis 20 Mikrometer. Auch Verbunde bzw. Laminate mehrerer Folien können eingesetzt werden, z.B. ein LLDPE/PP/LLDPE-Film (LLDPE = lineares Polyethylen niederer Dichte; PP = Polypropylen), siehe
Die das Sicherheitsmerkmal gegenüber UV-Strahlung schützende, für UV-Strahlung im Wesentlichen undurchlässige Farbschicht kann z.B. auf einer Zusammensetzung mit speziellen UV-Absorbern basieren. Vorzugsweise werden Tinuvine als UV-Absorber eingesetzt, wobei Tinuvin 400 und Tinuvin 1130 besonders bevorzugt sind. In diesem Fall ist die drucktechnisch erhaltene Schicht bevorzugt transparent.The ultraviolet radiation protective, UV blocking, substantially impermeable ink layer may be e.g. based on a composition with special UV absorbers. Tinuvines are preferably used as UV absorbers, with Tinuvin 400 and Tinuvin 1130 being particularly preferred. In this case, the layer obtained by printing is preferably transparent.
Die das Sicherheitsmerkmal gegenüber UV-Strahlung schützende, für UV-Strahlung im Wesentlichen undurchlässige Farbschicht kann gemäß einer Alternative eine dunkle, insbesondere schwarze Farbschicht sein. In diesem Fall basiert die Schicht bevorzugt auf einem oder mehreren der folgenden Elemente: Ruß; Magnetpigmente (z.B. Pigmente auf Basis eines Harteisens, eines Weicheisens oder eines Carbonyleisens); ein Gemisch, das ein rotes Buntpigment, ein gelbes Buntpigment, ein blaues Buntpigment und einen UV-Absorber enthält; ein Gemisch, das einen schwarzen Leuco-Dye und einen UV-Absorber enthält.The colorant layer which protects the security feature from ultraviolet radiation and which is substantially opaque to UV radiation can, according to an alternative, be a dark, in particular black, color layer. In this case, the layer is preferably based on one or more of the following elements: carbon black; Magnetic pigments (e.g., pigments based on a hard iron, a soft iron, or a carbonyl iron); a mixture containing a red colored pigment, a yellow colored pigment, a blue colored pigment and a UV absorber; a mixture containing a black leuco dye and a UV absorber.
Die das Sicherheitsmerkmal gegenüber UV-Strahlung schützende, für UV-Strahlung im Wesentlichen undurchlässige Farbschicht kann gemäß einer weiteren Alternative eine deckende, UV-absorbierende Beschichtung auf Basis von z.B. Titandioxid sein.The ultraviolet radiation protective, UV blocking, substantially impermeable ink layer may, according to a further alternative, comprise a covering, UV absorbing coating based on e.g. Be titanium dioxide.
Der Begriff "für UV-Strahlung im Wesentlichen undurchlässige Farbschicht" ist so zu verstehen, dass die elektromagnetische Strahlung im Wellenlängenbereich von weniger als 380 nm bei der Transmission in einem Ausmaß von mindestens 40%, bevorzugt mindestens 80%, insbesondere bevorzugt mindestens 90%, reduziert wird.The term "ink layer substantially impermeable to UV radiation" is understood to mean that the electromagnetic radiation in the wavelength range of less than 380 nm in the transmission in a Extent of at least 40%, preferably at least 80%, particularly preferably at least 90% is reduced.
Bei dem erfindungsgemäßen Wertdokument kann es sich um eine Banknote, insbesondere eine Papierbanknote, eine Polymerbanknote oder eine Folienverbundbanknote, um eine Aktie, eine Anleihe, eine Urkunde, einen Gutschein, einen Scheck, eine hochwertige Eintrittskarte, aber auch um eine Ausweiskarte, wie etwa eine Kreditkarte, eine Bankkarte, eine Barzahlungskarte, eine Berechtigungskarte, einen Personalausweis oder eine Passpersonalisierungsseite handeln.The value document according to the invention can be a banknote, in particular a paper banknote, a polymer banknote or a film composite banknote, a share, a bond, a certificate, a coupon, a check, a high-quality admission ticket, but also an identity card, such as a banknote Credit card, a bank card, a cash card, an authorization card, an identity card or pass personalization page.
Weitere Ausführungsbeispiele sowie Vorteile der Erfindung werden nachfolgend anhand der Figuren erläutert, bei deren Darstellung auf eine maßstabs- und proportionsgetreue Wiedergabe verzichtet wurde, um die Anschaulichkeit zu erhöhen.Further exemplary embodiments and advantages of the invention are explained below with reference to the figures, in the representation of which a representation true to scale and proportion has been dispensed with in order to increase the clarity.
Es zeigen:
- Figuren 1
bis 5 - Beispiele eines erfindungsgemäßen Wertdokument-Substrats.
- FIGS. 1 to 5
- Examples of a value-document substrate according to the invention.
Alternativ zu der im vorangehenden Absatz beschriebenen schwarzen, auf Ruß-Pigmenten basierenden Farbe kann auch ein Infrarot-transparentes Schwarz, das auf einem gelben, einem roten und einem blauen Pigment basiert, eingesetzt werden. Dann enthält die oberhalb der schwarzen Schicht gedruckte Effektfarbe einen beigemischten UV-Absorber, oder das Effektpigment selbst besitzt bereits UV-absorbierende Eigenschaften. Dies ist beispielsweise der Fall, wenn als Effektpigment ein Iriodin-Pigment eingesetzt wird. Ein solches Iriodin-Pigment bzw. Perlglanzpigment basiert auf einem Trägersubstrat mit niedrigem Brechungsindex, z.B. Glimmer oder Siliciumdioxid, oder das Trägersubstrat ist ein dünnes Glasplättchen. Der Träger wird mit mehreren Schichten eines hochbrechenden Materials, wie Titandioxid, Eisen(III)-Oxid, Zirkoniumoxid oder/und Mischoxiden beschichtet. Wird als hochbrechendes Material Titandioxid eingesetzt, so ergibt sich mit diesem Material bereits die UV-absorbierende Wirkung. Die schwarze Beschichtung 5 ist erforderlich, damit der Farbton der Flüssigkristall-basierten thermochromen Farbe sichtbar wird.As an alternative to the black color based on carbon black pigment described in the preceding paragraph, an infrared-transparent black based on a yellow, a red and a blue pigment can also be used. Then, the effect color printed above the black layer contains a blended UV absorber, or the effect pigment itself already has UV-absorbing properties. This is the case, for example, when an iriodin pigment is used as the effect pigment. Such an iriodin pigment is based on a low refractive index support substrate, e.g. Mica or silica, or the carrier substrate is a thin glass plate. The support is coated with several layers of a high refractive index material, such as titanium dioxide, ferric oxide, zirconium oxide and / or mixed oxides. If titanium dioxide is used as the high-index material, then the UV-absorbing effect already results with this material. The
Gemäß einer Variante zu dem im voranstehenden Absatz beschriebenen Wertdokument-Substrat wird anstelle der Farbe 10 eine Effektfarbe auf Basis eines besonderen Interferenzpigments appliziert, welches durch das Vorhandensein einer hochbrechenden, auf Titandioxid basierenden Schicht bereits eine UV-absorbierende Wirkung aufweist. Wenn die Fluoreszenzfarbe 2c transparent ist, lässt sich diese Effektfarbe mittels des Auflegens auf einen schwarzen Untergrund von beiden Substratseiten verifizieren. Die Lumineszenz ist wegen der UV absorbierenden Wirkung des Interferenzpigmentes nur von einer Substratseite gut verifizierbar.According to a variant of the value-document substrate described in the preceding paragraph, instead of the
Claims (8)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015005448.1A DE102015005448A1 (en) | 2015-04-28 | 2015-04-28 | Value document substrate and value document |
Publications (1)
Publication Number | Publication Date |
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EP3090880A1 true EP3090880A1 (en) | 2016-11-09 |
Family
ID=55910066
Family Applications (1)
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EP16000945.2A Withdrawn EP3090880A1 (en) | 2015-04-28 | 2016-04-27 | Valuable document substrate and valuable document |
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EP (1) | EP3090880A1 (en) |
DE (1) | DE102015005448A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2021123136A1 (en) * | 2019-12-20 | 2021-06-24 | Oberthur Fiduciaire Sas | Multi-layered security structure for fiduciary use and security document using the structure |
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WO2004028825A2 (en) | 2002-09-19 | 2004-04-08 | Giesecke & Devrient Gmbh | Security paper |
WO2006034780A1 (en) | 2004-09-24 | 2006-04-06 | Giesecke & Devrient Gmbh | Optically variable security element |
WO2006066431A1 (en) | 2004-12-23 | 2006-06-29 | Landqart | Multilayer structure as a printing substrate, and method for the production thereof |
DE102006016048A1 (en) * | 2006-04-04 | 2007-10-18 | Giesecke & Devrient Gmbh | security element |
EP2028017A2 (en) * | 2007-08-23 | 2009-02-25 | De La Rue International Limited | Security devices for security substrates |
WO2011015622A1 (en) | 2009-08-06 | 2011-02-10 | Giesecke & Devrient Gmbh | Method for producing a security element and security element obtainable according to the method |
EP2463344A1 (en) | 2010-12-08 | 2012-06-13 | Giesecke & Devrient GmbH | Use of a polymeric binding agent |
-
2015
- 2015-04-28 DE DE102015005448.1A patent/DE102015005448A1/en not_active Withdrawn
-
2016
- 2016-04-27 EP EP16000945.2A patent/EP3090880A1/en not_active Withdrawn
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WO2004028825A2 (en) | 2002-09-19 | 2004-04-08 | Giesecke & Devrient Gmbh | Security paper |
WO2006034780A1 (en) | 2004-09-24 | 2006-04-06 | Giesecke & Devrient Gmbh | Optically variable security element |
WO2006066431A1 (en) | 2004-12-23 | 2006-06-29 | Landqart | Multilayer structure as a printing substrate, and method for the production thereof |
DE102006016048A1 (en) * | 2006-04-04 | 2007-10-18 | Giesecke & Devrient Gmbh | security element |
EP2028017A2 (en) * | 2007-08-23 | 2009-02-25 | De La Rue International Limited | Security devices for security substrates |
WO2011015622A1 (en) | 2009-08-06 | 2011-02-10 | Giesecke & Devrient Gmbh | Method for producing a security element and security element obtainable according to the method |
EP2463344A1 (en) | 2010-12-08 | 2012-06-13 | Giesecke & Devrient GmbH | Use of a polymeric binding agent |
Non-Patent Citations (1)
Title |
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ANGEWANDTE CHEMIE, vol. 122, 2010, pages 2 - 13 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2021123136A1 (en) * | 2019-12-20 | 2021-06-24 | Oberthur Fiduciaire Sas | Multi-layered security structure for fiduciary use and security document using the structure |
FR3105087A1 (en) * | 2019-12-20 | 2021-06-25 | Oberthur Fiduciaire Sas | Multilayer security structure for fiduciary use and security document making use of it |
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DE102015005448A1 (en) | 2016-11-03 |
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