DE102019007696A1 - Value document - Google Patents

Abstract

The invention relates to a document of value (1, 9, 17, 26) comprising a plastic substrate (6, 14, 181, 30) with a first surface and a second surface, wherein on the first surface of the plastic substrate (6, 14, 181, 30) an opaque, first ink acceptance layer (7, 15, 182, 31) provided with a recess is arranged and on the second surface of the plastic substrate (6, 14, 181, 30) an opaque, second ink acceptance layer provided with a recess (8, 16, 183, 32) and the two recesses form a window area (3, 11, 19, 28) of the document of value (1, 9, 17, 26), the first surface of the plastic substrate (6, 14, 181, 30 ) has a colored thin-film element (4, 12, 20, 29) in the area of the opaque, first ink-accepting layer (7, 15, 182, 31) provided with a recess.

Description

The invention relates to a value document based on a plastic substrate, the plastic substrate having a first surface and a second surface which are each provided with an opaque, first and second ink acceptance layer having a recess, the two recesses forming a window area of the value document and the first surface of the plastic substrate has a colored thin-film element in the region of the opaque, first ink-accepting layer provided with a recess.

Documents of value based on a plastic substrate, eg polymer banknotes or plastic banknotes, are known in the prior art, see eg the publication EL Prime, DH Solomon, Angewandte Chemie, 2010, Volume 122, pages 2 to 13 . BOPP films in the form of coextruded laminates are often used as the substrate, the surface of which is treated with an opaque ink-accepting layer based on a filler and a binder in order to improve the printability with printing ink in this way. Transparent windows can be produced by means of cutouts within the opaque ink-accepting layers applied to the front and rear of the plastic substrate.

The present invention is based on the object of improving the security against forgery of documents of value based on a plastic substrate.

This problem is solved by the combination of features defined in the main claim. Further developments are the subject of the sub-claims.

Summary of the invention

1. 1. A document of value comprising a plastic substrate with a first surface and a second surface, wherein an opaque, first ink-acceptance layer provided with a recess is arranged on the first surface of the plastic substrate and an opaque, second ink-acceptance layer provided with a recess is arranged on the second surface of the plastic substrate is arranged and the two cutouts form a window area of the document of value, the first surface of the plastic substrate having a colored thin-film element in the area of the opaque, first ink acceptance layer provided with a cutout.
2. 2. (Preferred embodiment) Document of value according to paragraph 1, wherein the opaque, second ink-acceptance layer arranged on the second surface of the plastic substrate has an opaque ink-acceptance layer area opposite the colored thin-film element formed on the first surface of the plastic substrate.
3. 3. (Preferred embodiment) Document of value according to paragraph 1 or 2, wherein the recess of the opaque, first ink-accepting layer and the recess of the opaque, second ink-accepting layer have the same dimensions, i.e. are congruent.
4. 4. (Preferred embodiment) value document according to one of paragraphs 1 to 3, wherein the recess of the opaque, first ink-accepting layer and the recess of the opaque, second ink-accepting layer have different dimensions, ie are arranged overlapping or a recess, in particular the recess of the opaque, second Ink acceptance layer, is arranged at least partially within the further recess.
5. 5. (Preferred embodiment) document of value according to one of paragraphs 1 to 4, wherein the colored thin-film element, which is formed on the first surface of the plastic substrate in the area of the opaque, first color-accepting layer provided with a recess, has smaller dimensions than the recess of the opaque, first Has ink acceptance layer, ie is arranged within the recess of the opaque, first ink acceptance layer.
6. 6. (Preferred embodiment) value document according to one of paragraphs 1 to 4, wherein the colored thin-film element, which is formed on the first surface of the plastic substrate in the area of the opaque, first color-accepting layer provided with a recess, at least partially larger dimensions than the recess of the opaque , first ink acceptance layer, ie the recess of the opaque, first ink acceptance layer completely or partially overlaps.
7. 7. (Preferred embodiment) document of value according to one of paragraphs 1 to 6, with the colored thin-film element is formed in the form of a first motif and the opaque, second color-accepting layer is formed on the side opposite the colored thin-film element in the form of a second motif, the first motif and the second motif when viewing the document of value at the normal angle to the first Supplement the surface of the plastic substrate in the window area of the document of value in such a way that the second motif at least partially represents a background to the first motif.
8. 8. (Preferred embodiment) document of value according to one of paragraphs 1 to 6, wherein the colored thin-film element is formed in the form of a first motif and the opaque, second color-accepting layer on the side opposite the colored thin-film element is formed in the form of a second motif, with the first motif and the second motif when viewing the document of value at the normal angle on the second surface of the plastic substrate in the window area of the document of value so that the first motif at least partially represents a background to the second motif.
9. 9. (Preferred embodiment) document of value according to one of paragraphs 1 to 6, wherein the colored thin-film element is formed in the form of a first motif and the opaque, second ink-accepting layer is printed with printing ink in the form of a second motif on the side opposite the colored thin-film element, wherein the first motif and the second motif when viewing the document of value at the normal angle on the first surface of the plastic substrate in the window area of the document of value complement each other such that the second motif at least partially represents a background to the first motif.
10. 10. (Preferred embodiment) document of value according to one of paragraphs 1 to 6, wherein the colored thin-film element is formed in the form of a first motif and the opaque, second ink-accepting layer is printed with printing ink in the form of a second motif on the side opposite the colored thin-film element, wherein the first motif and the second motif when viewing the document of value at the normal angle on the second surface of the plastic substrate in the window area of the document of value complement each other such that the first motif at least partially represents a background to the second motif.
11. 11. (Preferred embodiment) value document according to one of paragraphs 1 to 8, wherein the colored thin-film element is a color-tilting thin-film element that gives a viewer a different color impression at different viewing angles, e.g. a thin-film element that has a reflective layer, a dielectric spacer layer and an absorber layer .
12. 12. (Preferred embodiment) value document according to one of paragraphs 1 to 11, wherein the colored thin-film element is a semitransparent thin-film element that gives a viewer a different color impression when viewing in incident light and when viewing in transmitted light, e.g. a thin-film element that has two semitransparent Having mirror layers and a dielectric spacer layer arranged between the two mirror layers.
13. 13. (Preferred embodiment) Document of value according to one of paragraphs 1 to 11, the colored thin-film element being connected to the first surface of the plastic substrate by means of an adhesive layer.
14. 14. (Preferred embodiment) Document of value according to one of paragraphs 1 to 13, wherein the colored thin-film element is in the form of a film security element having a plastic substrate and is connected to the first surface of the plastic substrate by means of an adhesive layer.
15. 15. (Preferred embodiment) Document of value according to one of paragraphs 1 to 14, wherein the plastic substrate of the document of value is based on polyethylene, terylene, polyvinyl chloride, polypropylene, biaxially oriented polypropylene or on a film or a coextruded laminate with several of the aforementioned materials, in particular one coextruded laminate with the layer sequence LLDPE / PP / LLDPE or LLDPE / BOPP / LLDPE / LLDPE / BOPP / LLDPE.
16. 16. (Preferred embodiment) Document of value according to one of paragraphs 1 to 14, wherein the plastic substrate of the document of value is a film / paper / film composite substrate or a paper / film / paper composite substrate.
17. 17. (Preferred embodiment) Document of value according to one of paragraphs 1 to 16, wherein the opaque, first ink-accepting layer and the opaque, second ink-accepting layer each have a filler and a binding agent and can optionally be present with different opacity.
18. 18. (Preferred embodiment) Document of value according to one of paragraphs 1 to 17, wherein the document of value is a bank note, in particular a polymer bank note or a film composite bank note, an identification document or a payment card

Detailed description of the invention

In the context of this invention, viewing in incident light is illumination of the document of value from one side and viewing of the document of value from the same side. Viewing in incident light is thus present, for example, when the front side of the document of value is illuminated and also viewed.

In the context of this invention, viewing in transmitted light is illuminating a document of value from one side and viewing the Document of value from another side, especially the opposite side. Viewing in transmitted light is thus present, for example, when the back of the document of value is illuminated and the front of the document of value is viewed. The light thus shines through the value document.

The present invention is based on the idea of equipping the transparent window of a document of value based on a plastic substrate, in particular a polymer banknote, with a colored thin-film element in order to improve security against forgery in this way.

Colored thin-film elements, the color impression of which changes for the viewer with the viewing angle (hereinafter referred to as the color shift effect), are, for example, from FIG WO 2009/080263 A2 known. The color shift effect in such thin-film elements is based on viewing angle-dependent interference effects due to multiple reflections in the various sub-layers of the element. The difference in the path of the light reflected on the various layers depends on the one hand on the optical thickness of a dielectric spacer layer (e.g. an SiO2 layer), which defines the distance between a semitransparent absorber layer (e.g. a Cr layer) and a reflective layer (e.g. an Al layer ), and on the other hand varies with the respective viewing angle. Since the path difference is in the order of magnitude of the wavelength of visible light, an angle-dependent color impression results for the viewer due to the extinction and amplification of certain wavelengths. A large number of different color-shift effects can be created through a suitable choice of material and thickness of the dielectric spacer layer.

• - die beiden semitransparenten metallischen Schichten werden bevorzugt von A1 oder Ag gewählt; die dielektrische Schicht ist insbesondere eine SiO2-Schicht oder eine MgF2-Schicht, bevorzugt eine SiO2-Schicht;
• - im Falle, dass jede der beiden semitransparenten metallischen Schichten auf A1 beruht, liegt die jeweilige bevorzugte Schichtdicke in einem Bereich von 5 nm bis 20 nm, insbesondere bevorzugt in einem Bereich von 10 nm bis 14 nm; die dielektrische SiO2-Schicht hat vorzugsweise eine Schichtdicke in einem Bereich von 50 nm bis 450 nm, weiter bevorzugt in einem Bereich von 80 nm bis 260 nm und insbesondere bevorzugt in einem Bereich von 210 nm bis 260 nm, wobei die Bereiche von 80 nm bis 100 nm und von 210 nm bis 240 nm speziell für die Bereitstellung eines Gold/Blau-Farbwechsels besonders bevorzugt werden;
• - im Falle, dass jede der beiden semitransparenten metallischen Schichten auf Ag beruht, liegt die jeweilige bevorzugte Schichtdicke in einem Bereich von 15 nm bis 30 nm, insbesondere bevorzugt von 15 nm bis 25 nm; die dielektrische SiO2-Schicht hat vorzugsweise eine Schichtdicke in einem Bereich von 50 nm bis 450 nm, weiter bevorzugt in einem Bereich von 80 nm bis 260 nm und insbesondere bevorzugt in einem Bereich von 210 nm bis 260 nm, wobei die Bereiche von 80 nm bis 100 nm und von 210 nm bis 240 nm speziell für die Bereitstellung eines Gold/Blau-Farbwechsels besonders bevorzugt werden.

A semitransparent thin-film element can also be used as a colored thin-film element, which gives a viewer a different color impression when viewed in incident light and when viewed in transmitted light, e.g. a thin-film element that has two semitransparent mirror layers and a dielectric spacer layer arranged between the two mirror layers. Such a thin-film element, which appears gold-colored in incident light and bluish in transmitted light, is in the WO 2011/082761 A1 described. Suitable multilayer structures with two semitransparent metallic layers and a dielectric layer arranged between the two semitransparent metallic layers preferably have the following physical properties:

• the two semitransparent metallic layers are preferably selected from A1 or Ag; the dielectric layer is in particular an SiO2 layer or an MgF2 layer, preferably an SiO2 layer;
• In the event that each of the two semitransparent metallic layers is based on A1, the respective preferred layer thickness is in a range from 5 nm to 20 nm, particularly preferably in a range from 10 nm to 14 nm; the dielectric SiO2 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 and particularly preferably in a range from 210 nm to 260 nm, the ranges from 80 nm to 100 nm and from 210 nm to 240 nm are especially preferred for providing a gold / blue color change;
• - In the event that each of the two semitransparent metallic layers is based on Ag, the respective preferred layer thickness is in a range from 15 nm to 30 nm, particularly preferably from 15 nm to 25 nm; the dielectric SiO2 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 and particularly preferably in a range from 210 nm to 260 nm, the ranges from 80 nm to 100 nm and from 210 nm to 240 nm are particularly preferred especially for providing a gold / blue color change.

• - ein Silber/ Dielektrikum/ Aluminium-Schichtsystem, wobei die Schichtdicken der Silber-Schicht und der Aluminium-Schicht identisch oder verschieden sind;
• - ein Silber/Dielektrikum/Silber-Schichtsystem, wobei die Schichtdicken der beiden Silber-Schichten verschieden sind;
• - ein Aluminium/Dielektrikum/ Aluminium-Schichtsystem, wobei die Schichtdicken der beiden Aluminium-Schichten verschieden sind.

The above-mentioned multilayer structures with two semitransparent metallic layers and a dielectric layer arranged between the two semitransparent metallic layers can have a symmetrical three-layer structure in which both the material and the layer thickness of the two semitransparent metallic layers are identical. Alternatively, however, there can also be an asymmetrical three-layer structure in which the material and / or the layer thickness of the two semitransparent metallic layers are different, for example

• a silver / dielectric / aluminum layer system, the layer thicknesses of the silver layer and the aluminum layer being identical or different;
• a silver / dielectric / silver layer system, the layer thicknesses of the two silver layers being different;
• - An aluminum / dielectric / aluminum layer system, the layer thicknesses of the two aluminum layers being different.

• - im Auflicht Magenta, im Durchlicht Blau-Grün;
• - im Auflicht Türkis, im Durchlicht Orange-Gelb;
• - im Auflicht Gold, im Durchlicht Blau-Violett;
• - im Auflicht Silber, im Durchlicht Violett.

The above-mentioned multi-layer structures not only enable the creation of a semitransparent functional layer, which appears gold when viewed in reflected light and shows a blue hue when viewed in transmitted light, but further color changes can be generated depending on the choice of layer thickness, especially of the dielectric layer, e.g.

• - Magenta in incident light, blue-green in transmitted light;
• - turquoise in incident light, orange-yellow in transmitted light;
• - Gold in incident light, blue-violet in transmitted light;
• - Silver in incident light, violet in transmitted light.

In the case of plastic-based documents of value, in particular polymer banknotes, the shape of the transparent window can be elegantly modulated by the opaque ink-acceptance layers applied to the front and back. In this way, in the case of congruent recesses within the two opaque ink-receiving layers, transparent windows can be created. In the case of non-congruent, e.g. overlapping, recesses within the two opaque ink acceptance layers, e.g. windows with a semi-transparent area and with a transparent area can be created. The modulation of the two opaque ink acceptance layers in combination with a colored thin layer element applied on one side leads to interesting and advantageous optical window effects. In particular, interesting foreground / background effects can be achieved in the window area of the document of value, in which the colored thin-layer element represents a motif in the foreground and the opaque ink-accepting layer on the back of the document of value, especially printed with a colored printing ink, represents a background - or vice versa. Such windows with an additional optical "foreground / background effect" cannot be achieved with conventional paper banknotes, in which a recess is first created in the paper in a first manufacturing step by means of punching or laser cutting and in a subsequent second manufacturing step the recess is created with a colored foil security element is covered.

According to the invention, the colored thin-film element (hereinafter also simply referred to as “security element”) can be provided, for example, starting from transfer tapes with a multiplicity of security elements designed as transfer elements or transfer patches. It is characteristic of transfer tapes that the security elements are prepared on a carrier layer, the order of the layers of the transfer elements usually being reversed compared to the order of layers later present on the object to be protected. During the transfer, the carrier layer is typically peeled off from the layer structure of the security elements. On the side opposite the carrier layer, the transfer tapes have an adhesive layer, usually made of a heat-sealing adhesive or heat-sealing lacquer, which melts during the transfer of the security elements and bonds the security elements to the object to be secured. The transfer tape with the heat-sealing adhesive layer is placed on the object and pressed on by means of a heated transfer stamp or a transfer roller and transferred to the object in the shape of the heated transfer stamp. Transfer elements, transfer belts and the transfer of transfer elements to target substrates are for example in the EP 0 420 261 B1 and the WO 2005/108108 A2 described.

According to the invention, however, the colored thin-film element can also have a permanent carrier substrate, for example a plastic film. However, the total thickness of the document of value received at the end in the window area is increased in this way. A security element transfer material in the form of an endless material, in which security elements are precut in the desired outline shapes, and the precut elements can then be transferred to products to be secured without the risk of tearing the carrier material, is known from the WO 2010/031543 A1 known. The security element transfer material is an endless material, in particular a tape with a length of several hundred meters and a width of a few millimeters / centimeters up to several meters. The security element transfer material has a security element layer composite, ie the actual security element material, and a temporary carrier, ie the material on which the security elements are “stored”. The temporary carrier is based, for example, on a carrier layer composite consisting of a first and a second temporary carrier substrate, which are permanently glued by means of an adhesive layer. The security element layer composite is connected to a temporary carrier either directly or by means of a release layer. The release layer is of a conventional type and facilitates the detachment of the security elements from the temporary carrier during the transfer process to an object of value. The temporary carrier is located on the side of the security element layer composite which, after the transfer of the security elements, faces a viewer. The term “temporary” carrier substrates expresses that, in contrast to the “permanent” carrier substrate, these carrier substrates are not part of the security elements.

Preferred embodiments and advantages of the invention are described below with reference to FIG schematically simplified figures explained, in the representation of which a true-to-scale and proportionate reproduction was dispensed with in order to increase the clarity.

• 1 und 2 ein erstes Ausführungsbeispiel für das erfindungsgemäße Wertdokument;
• 3 und 4 ein zweites Ausführungsbeispiel für das erfindungsgemäße Wertdokument;
• 5 und 6 ein drittes Ausführungsbeispiel für das erfindungsgemäße Wertdokument;
• 7 und 8 eine im Bereich einer Papieraussparung mit einem Foliensicherheitselement versehene Papierbanknote gemäß einem Vergleichsbeispiel;
• 9 bis 11 ein viertes Ausführungsbeispiel für das erfindungsgemäße Wertdokument;
• 12 ein Ausführungsbeispiel für ein Sicherheitselement-Transfermaterial, ausgehend von dem ein farbiges Dünnschichtelement für die Herstellung des erfindungsgemäßen Wertdokuments bereitgestellt werden kann; und
• 13 ein weiteres Ausführungsbeispiel für ein Sicherheitselement-Transfermaterial, ausgehend von dem ein farbiges Dünnschichtelement für die Herstellung des erfindungsgemäßen Wertdokuments bereitgestellt werden kann.

Show it:

• 1 and 2 a first embodiment of the document of value according to the invention;
• 3 and 4th a second embodiment for the document of value according to the invention;
• 5 and 6th a third embodiment for the document of value according to the invention;
• 7th and 8th a paper bank note provided with a foil security element in the area of a paper recess according to a comparative example;
• 9 to 11 a fourth embodiment for the document of value according to the invention;
• 12th an exemplary embodiment of a security element transfer material, starting from which a colored thin-film element can be provided for the production of the document of value according to the invention; and
• 13th a further exemplary embodiment for a security element transfer material, on the basis of which a colored thin-film element can be provided for the production of the document of value according to the invention.

The 1 shows a first embodiment of a document of value according to the invention 1 , in the example a banknote with the denomination " 20th “, In plan view. The value document 1 comprises a value document substrate 2 based on plastic, which is provided with an opaque ink-accepting layer on its first surface and on its second surface. The opaque ink accepting layer is in the 1 Shown in a shade of gray and is based on an inorganic filler and a binder. Suitable dye-accepting layers, the opacity of which can be adjusted depending on the choice of the underlying composition, are known in the prior art, see, for example, US Pat WO 2010/130755 A2 and the WO 2012/003947 A1 . The 1 shows the value document 1 when looking at the first surface in a plan view. The value document 1 has a window area 3 which is formed by recesses in the opaque ink-receiving layers. In the window area 3 assigns the value document 1 in addition, a colored thin-film element 4th on. The colored thin-film element 4th is in the present example a semitransparent thin-film element that gives a viewer a golden color impression when viewed in incident light and a bluish color impression when viewed in transmitted light. The colored thin-film element comprises two semitransparent mirror layers, each with an Al layer, and a dielectric spacer _{layer, namely an SiO 2} layer, arranged between the two mirror layers. Such a thin-film element, which appears gold-colored in incident light and bluish in transmitted light, is, for example, in the WO 2011/082761 A1 described. The Al / SiO ₂ / Al layer system of the colored thin-film element 4th is located above a UV embossing lacquer, which is provided with an embossed relief, for example in the form of a hologram structure. The UV embossing lacquer is attached to the value document substrate by means of an adhesive layer 2 connected. The viewer takes the colored thin-film element 4th when viewed in incident light in golden color and also sees an additional optically variable effect depending on the viewing angle due to the hologram structure. The colored thin-film element 4th appears to the viewer in transmitted light in a bluish color. The colored thin-film element 4th is ring-shaped surrounded by a transparent window area.

The one in the 1 shown denomination " 20th “With the reference number 5 was printed in a dark color on the value document 1 upset.

The 2 shows the value document 1 in cross-sectional view along the line in FIG 1 dashed line shown. With the block arrow "A" is in the 1 illustrated consideration of the value document 1 in plan view of the first surface of the document of value 1 made clear.

The value document substrate 1 comprises a plastic substrate 6th , in the example a coextruded laminate with the layer sequence LLDPE / BOPP / LLDPE / LLDPE / BOPP / LLDPE. The plastic substrate 6th is on its first surface and on its second surface each with a first opaque ink-receiving layer 7th or a second opaque ink-receiving layer 8th provided that in the window area 3 have a recess. On the first surface of the plastic substrate 6th is in the window area 3 the colored thin-film element 4th arranged. With the reference number 5 shows the dark printing color used for the 1 shown denomination " 20th “Of the document of value 1 is generated.

The 3 shows a second embodiment of a document of value according to the invention 9 , in the example a banknote, in plan view. The value document 9 comprises a value document substrate 10 based on plastic, which is provided with an opaque ink-accepting layer on its first surface and on its second surface. The opaque ink accepting layer is in the 3 Shown in a shade of gray and is based on an inorganic filler and a binder. The 3 shows the value document 9 when viewing the second surface in plan. The value document 9 shows a pane 11 which is formed by recesses in the opaque ink-receiving layers. In the window area 11 assigns the value document 9 in addition, a colored thin-film element 12th on. The colored thin-film element 12th is in the present example a semitransparent thin-film element, which gives a viewer a golden color impression when viewed in incident light and a bluish color impression when viewed in transmitted light and is based on an Al / SiO ₂ / Al layer system. The colored thin-film element 12th is located above a UV embossing lacquer, which is provided with an embossed relief, for example in the form of a hologram structure. The UV embossing lacquer is attached to the value document substrate by means of an adhesive layer 10 connected. The viewer takes the colored thin-film element 12th when viewed in incident light in golden color and also sees an additional optically variable effect depending on the viewing angle due to the hologram structure. The colored thin-film element 12th appears to the viewer in transmitted light in a bluish color. The colored thin-film element 12th is ring-shaped surrounded by a transparent window area. In the central area 13th assigns the value document 9 an additional area with an opaque ink-accepting layer that can be printed with printing ink. The visual attractiveness of the colored thin-film element 12th is upgraded in this way.

The 4th shows the value document 9 in cross-sectional view along the line in FIG 3 dashed line shown. With the block arrow "A" is in the 3 illustrated consideration of the value document 9 in plan view of the second surface of the document of value 9 made clear.

The value document substrate 10 comprises a plastic substrate 14th , in the example a coextruded laminate with the layer sequence LLDPE / BOPP / LLDPE / LLDPE / BOPP / LLDPE. The plastic substrate 14th is on its first surface and on its second surface each with a first opaque ink-receiving layer 15th or a second opaque ink-receiving layer 16 provided that in the window area 11 have a recess. With the reference number 13th an additional area with an opaque ink-accepting layer is shown, which is the colored thin-layer element 12th opposite is. On the first surface of the plastic substrate 14th is in the window area 11 the colored thin-film element 12th arranged. As already mentioned, the document of value 9 in the area 13th an additional area with an opaque ink-accepting layer that can be printed with printing ink. The visual attractiveness of the colored thin-film element 12th is upgraded in this way.

The 5 shows a third embodiment of a document of value according to the invention 17th , in the example a banknote, in plan view. The value document 17th comprises a value document substrate 18th based on plastic, which is provided with an opaque ink-accepting layer on its first surface and on its second surface. The opaque ink accepting layer is in the 5 Shown in a shade of gray and is based on an inorganic filler and a binder. The 5 shows the value document 17th when viewing the second surface in plan. The value document 17th has a window area 19th which is formed by recesses in the opaque ink-receiving layers. In the window area 19th assigns the value document 17th in addition, a colored thin-film element 20th sun rays obtained in the shape of a sun and furthermore with red printing ink 21st on. The colored thin-film element 20th is in the present example a semitransparent thin-film element, which gives a viewer a golden color impression when viewed in incident light and a bluish color impression when viewed in transmitted light and is based on an Al / SiO ₂ / Al layer system. The colored thin-film element 20th is located above a UV embossing lacquer, which is provided with an embossed relief, for example in the form of a hologram structure. The UV embossing lacquer is attached to the value document substrate by means of an adhesive layer 18th connected. The viewer takes the colored thin-film element 20th when viewed in incident light in golden color and also sees an additional optically variable effect depending on the viewing angle due to the hologram structure. The colored thin-film element 20th appears to the viewer in transmitted light in a bluish color. The colored thin-film element 12th is ring-shaped surrounded by a transparent window area. Because of the additional rays of the sun 21st in red printing ink the visual attractiveness of the colored thin-film element becomes 20th upgraded.

The 6th shows the value document 17th in cross-sectional view along the line in FIG 5 dashed line shown. With the block arrow "A" is in the 5 illustrated consideration of the value document 17th in plan view of the second surface of the document of value 17th made clear.

The value document substrate 17th comprises a plastic substrate 181 , in the example a coextruded laminate with the layer sequence LLDPE / BOPP / LLDPE / LLDPE / BOPP / LLDPE. The plastic substrate 181 is on its first surface and on its second surface each with a first opaque ink-receiving layer 182 or a second opaque ink-receiving layer 183 provided that in the window area 19th have a recess. The recesses are not designed to be congruent, but the recess in the second opaque ink-receiving layer 183 has smaller dimensions than the recess in the first opaque ink-receiving layer 182 . On the first surface of the plastic substrate 181 is in the window area 19th the colored thin-film element 20th arranged. With the reference number 21st is the red ink shown in the 5 produce the red rays of the sun.

The 7th shows one in the area of a paper recess 25th with a foil security element 24 provided paper banknote 22nd according to a comparative example. The paper banknote 22nd is based on a paper substrate 23 that is in the dashed area 25th has a recess produced by means of punching or laser cutting. The recess 25th is with a foil security element 24 covered. The foil security element 24 is based on a polyethylene terephthalate film, which is provided with a UV embossing lacquer with hologram relief and a colored thin-film element with the layer sequence Al / SiO ₂ / A1 formed above the UV embossing lacquer. The foil security element 24 is by means of an adhesive layer with the paper substrate 23 connected. The colored thin-film element with the layer sequence Al / SiO ₂ / A1 can be perceived by the observer in a golden color when viewed in incident light and in a bluish color when viewed in transmitted light.

The 8th shows the paper banknote 22nd in cross-sectional view along the line in FIG 7th dashed line shown. Using the in the 8th The arrangement shown can be seen that the value document 22nd in the foil security element 24 opposite paper recess 25th can only be printed with difficulty with additional, technically available patterns, so the person skilled in the art has relatively little design freedom with regard to the visual enhancement of the window area.

The 9 shows a fourth embodiment of a document of value according to the invention 26th , in the example a banknote, in plan view. The value document 26th comprises a value document substrate 27 based on plastic, which is provided with an opaque ink-accepting layer on its first surface and on its second surface. The opaque ink accepting layer is in the 9 Shown in a shade of gray and is based on an inorganic filler and a binder. The 9 shows the value document 26th when looking at the first surface in a plan view. The value document 26th has a window area 28 which is formed by recesses in the opaque ink-receiving layers. In the window area 28 assigns the value document 26th in addition, a colored thin-film element 29 on that with respect to its scope partly over the window area 28 goes out. The colored thin-film element 29 is in the present example a semitransparent thin-film element, which gives a viewer a golden color impression when viewed in incident light and a bluish color impression when viewed in transmitted light and is based on an Al / SiO ₂ / Al layer system. The colored thin-film element 29 is located above a UV embossing lacquer, which is provided with an embossed relief, for example in the form of a hologram structure. The UV embossing lacquer is attached to the value document substrate by means of an adhesive layer 27 connected. The viewer takes the colored thin-film element 29 when viewed in incident light in golden color and also sees an additional optically variable effect depending on the viewing angle due to the hologram structure. The colored thin-film element 29 appears to the viewer in transmitted light in a bluish color. The colored thin-film element 29 is crescent-shaped on its upper side and on its lower side, surrounded by a transparent window area.

The 10 shows the value document 26th in cross-sectional view along the line in FIG 9 dashed line B-B 'shown. With the block arrow "A" is in the 9 illustrated consideration of the value document 26th in plan view of the first surface of the document of value 26th made clear.

The value document substrate 26th comprises a plastic substrate 30th , in the example a coextruded laminate with the layer sequence LLDPE / BOPP / LLDPE / LLDPE / BOPP / LLDPE. The plastic substrate 30th is on its first surface and on its second surface each with a first opaque ink-receiving layer 31 or a second opaque ink-receiving layer 32 provided that in the window area 28 have a recess. On the first surface of the plastic substrate 30th is in the window area 28 the colored thin-film element 29 arranged. Based on 10 it can be seen that the recess is in the second opaque ink acceptance layer 32 along the axis BB 'of the 9 is smaller than the recess in the first opaque ink-receiving layer 31 so that the colored thin-film element 29 partly from the second opaque ink-receiving layer 32 is covered and can be printed in this way with printing ink. The visual attractiveness of the colored thin-film element 29 is upgraded in this way.

The 11 shows the value document 26th in cross-sectional view along the line in FIG 9 dashed line C-C 'shown. With the block arrow "A" is in the 9 illustrated consideration of the value document 26th in plan view of the first surface of the document of value 26th made clear. Based on 11 it can be seen that the recess is in the second opaque ink acceptance layer 32 along the axis CC 'of the 9 with the recess in the first opaque ink-receiving layer 31 along the axis CC 'of the 9 is congruent.

In particular, based on the 9 to 11 the advantages of two opaque ink acceptance layers, which are not congruent but rather overlapping, in connection with a colored thin-layer element in the window area can be recognized.

The 12th shows an embodiment for a security element transfer material 33 , based on which a colored thin-film element (e.g. with the reference number 4th in the 1 and 2 ) can be provided for the production of the document of value according to the invention. The security element transfer material 33 contains one the layers 34 , 35 and 36 containing carrier material (= temporary carrier) and the layers 37 , 38 , 39 , 40 and 41 containing upper material. The dashed line DD 'shows the area on which the upper material is detached from the temporary carrier later in the course of applying the upper material (ie the material containing the colored thin-film element to be applied as a transfer element to the document of value) on a document of value. The security element transfer material 33 contains a polyethylene terephthalate (PET) film 34 as a temporary carrier, which by means of an adhesive layer 35 is inextricably connected to another polyethylene terephthalate (PET) film 36. With the reference number 37 is called a release layer. Adjacent to this is a primer paint 38 , a colored thin-film element with recesses 39 with the layer sequence Al / SiO ₂ / A1, a UV embossing lacquer 40 and an adhesive layer suitable for gluing to the plastic substrate of the document of value according to the invention 41 .

In the course of the application of the colored thin-film element 39 containing upper material by means of the adhesive layer 41 on the plastic substrate of the document of value according to the invention there is subsequently a detachment of the upper material from the temporary carrier along the in the 12th dashed line D-D 'shown. That the layers 37 , 38 , 39 , 40 and 41 containing upper material has no additional, permanent film substrate and thus has a relatively small layer thickness. In this way, documents of value can be obtained which have an optically attractive design in the window area and, in view of the relatively small layer thickness, also have good stackability.

The 13th shows a further embodiment for a security element transfer material 42 , based on which a colored thin-film element (e.g. with the reference number 4th in the 1 and 2 ) can be provided for the production of the document of value according to the invention. The security element transfer material 42 contains one the layers 43 and 44 containing carrier material (= temporary carrier) and the layers 45 , 46 , 47 , 48 , 49 and 50 containing upper material. The dashed line EE 'shows the area on which the upper material is detached from the temporary carrier later in the course of applying the upper material (ie the material containing the colored thin-film element to be applied to the value document as a transfer element) on a value document. The security element transfer material 42 contains one of the layers as a temporary carrier 43 and 44 containing coextruded film that runs along the interface between the layers 43 and 44 are inextricably linked. With the reference number 45 is called a release layer. Adjacent to this is a colored thin-film element provided with cutouts 46 with the layer sequence Al / SiO ₂ / A1, a UV embossing lacquer 47 , an adhesive layer 48 , a permanent film substrate 49 (in the example a PET film) and an adhesive layer suitable for gluing to the plastic substrate of the document of value according to the invention 50 .

In the course of the application of the colored thin-film element 46 containing upper material by means of the adhesive layer 50 on the plastic substrate of the document of value according to the invention there is subsequently a detachment of the upper material from the temporary carrier along the in the 13th dashed line E-E 'shown. That the layers 45 to 50 Containing upper material has an additional, permanent film substrate 49 and thus has an increased layer thickness. In this way, value documents can be achieved which have an optically attractive design in the window area and, in view of the increased layer thickness in the window area, are also advantageous with regard to the haptic perception of the value document.

With regard to the plastic substrate of the document of value, the above exemplary embodiments were only referred to by way of example on a coextruded laminate with the layer sequence LLDPE / BOPP / LLDPE / LLDPE / BOPP / LLDPE. Alternatively, of course, other plastic substrates known in the prior art can be used. Furthermore, instead of a pure polymer substrate, it is also possible to use composite film substrates, for example a film / paper / film composite substrate, see, for example, FIG WO 2004/028825 A2 , or a paper / foil / paper composite substrate.

Furthermore, the opaque ink-accepting layers can differ from one another in terms of opacity. In this way, interesting watermark effects can be achieved, especially in the window area.

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• WO 2009/080263 A2 [0008]
• WO 2011/082761 A1 [0009, 0017]
• EP 0420261 B1 [0013]
• WO 2005/108108 A2 [0013]
• WO 2010/031543 A1 [0014]
• WO 2010/130755 A2 [0017]
• WO 2012/003947 A1 [0017]
• WO 2004/028825 A2 [0038]

Non-patent literature cited

• E.L. Prime, D.H. Solomon, Angewandte Chemie, 2010, Volume 122, Pages 2 to 13 [0002]

Claims (18)

Value document (1, 9, 17, 26) comprising a plastic substrate (6, 14, 181, 30) with a first surface and a second surface, wherein on the first surface of the plastic substrate (6, 14, 181, 30) one with a recess provided opaque, first ink acceptance layer (7, 15, 182, 31) is arranged and on the second surface of the plastic substrate (6, 14, 181, 30) is provided with a recess, opaque, second ink acceptance layer (8, 16, 183, 32) is arranged and the two recesses form a window area (3, 11, 19, 28) of the document of value (1, 9, 17, 26), the first surface of the plastic substrate (6, 14, 181, 30) in the area of the one The opaque, first ink-accepting layer (7, 15, 182, 31) provided with a recess has a colored thin-layer element (4, 12, 20, 29). Document of value (1, 9, 17, 26) according to Claim 1 , wherein the opaque, second ink-accepting layer (8, 16, 183, 32) arranged on the second surface of the plastic substrate (6, 14, 181, 30) is one of the one on the first surface of the plastic substrate (6, 14, 181, 30) formed colored thin-film element (4, 12, 20, 29) opposite opaque ink-receiving layer area (13). Document of value (1, 9, 17, 26) according to Claim 1 or 2 , wherein the recess of the opaque, first ink acceptance layer (7,15,182,31) and the recess of the opaque, second ink acceptance layer (8, 16, 183, 32) have the same dimensions, ie are congruent. Value document (1, 9, 17, 26) according to one of the Claims 1 to 3 , wherein the recess of the opaque, first ink acceptance layer (7, 15, 182, 31) and the recess of the opaque, second ink acceptance layer (8, 16, 183, 32) have different dimensions, ie are arranged overlapping or a recess, in particular the recess the opaque, second ink acceptance layer (8, 16, 183, 32) is arranged at least partially within the further recess. Document of value (1, 9, 17, 26) according to one of the Claims 1 to 4th , wherein the colored thin-film element (4, 12, 20, 29) which is on the first surface of the plastic substrate (6, 14, 181, 30) in the area of the opaque first ink-accepting layer (7, 15, 182, 31 ) is formed, has smaller dimensions than the recess of the opaque, first ink acceptance layer (7,15,182,31), ie is arranged within the recess of the opaque, first ink acceptance layer (7, 15, 182, 31). Value document (1, 9, 17, 26) according to one of the Claims 1 to 4th , wherein the colored thin-film element (4, 12, 20, 29) which is on the first surface of the plastic substrate (6, 14, 181, 30) in the area of the opaque first ink-accepting layer (7, 15, 182, 31 ) is formed, has at least partially larger dimensions than the recess of the opaque, first ink acceptance layer (7,15,182,31), ie the recess of the opaque, first ink acceptance layer (7, 15, 182, 31) completely or partially overlaps. Document of value (1, 9, 17, 26) according to one of the Claims 1 to 6th , wherein the colored thin-film element (4, 12, 20, 29) is formed in the form of a first motif and the opaque, second ink-accepting layer (8, 16, 183, 32) on the colored thin-film element (4, 12, 20, 29) opposite side is formed in the form of a second motif, the first motif and the second motif when viewing the document of value (1, 9, 17, 26) at the normal angle on the first surface of the plastic substrate (6, 14, 181, 30 ) add in the window area of the document of value (1, 9, 17, 26) so that the second motif at least partially represents a background to the first motif. Document of value (1, 9, 17, 26) according to one of the Claims 1 to 6th , wherein the colored thin-film element (4, 12, 20, 29) is formed in the form of a first motif and the opaque, second ink-accepting layer (8, 16, 183, 32) on the colored thin-film element (4, 12, 20, 29) opposite side is formed in the form of a second motif, the first motif and the second motif when viewing the document of value (1, 9, 17, 26) at the normal angle on the second surface of the plastic substrate (6, 14, 181, 30 ) add in the window area of the document of value (1, 9, 17, 26) so that the first motif at least partially represents a background to the second motif. Value document (1, 9, 17, 26) according to one of the Claims 1 to 6th , the colored thin-film element (4, 12, 20, 29) in the form of a first motif is formed and the opaque, second ink acceptance layer (8, 16, 183, 32) on the side opposite the colored thin-layer element (4, 12, 20, 29) is printed with printing ink in the form of a second motif, the first motif and supplement the second motif when viewing the document of value (1, 9, 17, 26) at the normal angle on the first surface of the plastic substrate (6, 14, 181, 30) in the window area of the document of value (1, 9, 17, 26), that the second motif at least partially represents a background to the first motif. Document of value (1, 9, 17, 26) according to one of the Claims 1 to 6th , wherein the colored thin-film element (4, 12, 20, 29) is formed in the form of a first motif and the opaque, second ink-accepting layer (8, 16, 183, 32) on the colored thin-film element (4, 12, 20, 29) opposite side is printed with printing ink in the form of a second motif, the first motif and the second motif when viewing the document of value (1, 9, 17.26) at the normal angle on the second surface of the plastic substrate (6, 14, 181 , 30) in the window area of the document of value (1, 9, 17, 26) so that the first motif at least partially represents a background to the second motif. Document of value (1, 9, 17, 26) according to one of the Claims 1 to 8th , wherein the colored thin-film element (4, 12, 20, 29) is a color-tilting thin-film element that gives a viewer a different color impression at different viewing angles, e.g. a thin-film element that has a reflective layer, a dielectric spacer layer and an absorber layer. Document of value (1, 9, 17, 26) according to one of the Claims 1 to 11 , wherein the colored thin-film element (4, 12, 20, 29) is a semitransparent thin-film element that gives a viewer a different color impression when viewing in incident light and when viewing in transmitted light, e.g. a thin-film element that has two semitransparent mirror layers and one between the having both mirror layers arranged dielectric spacer layer. Document of value (1, 9, 17, 26) according to one of the Claims 1 to 11 , wherein the colored thin-film element (4, 12, 20, 29) is connected to the first surface of the plastic substrate (6, 14, 181, 30) by means of an adhesive layer. Document of value (1, 9, 17, 26) according to one of the Claims 1 to 13th , wherein the colored thin-film element (4, 12, 20, 29) is in the form of a foil security element having a plastic substrate and is connected to the first surface of the plastic substrate (6, 14, 181, 30) by means of an adhesive layer. Document of value (1, 9, 17, 26) according to one of the Claims 1 to 14th , wherein the plastic substrate (6, 14, 181, 30) of the document of value (1, 9, 17, 26) on polyethylene, terylene, polyvinyl chloride, polypropylene, biaxially oriented polypropylene or on a film or a coextruded laminate with several of the aforementioned materials based, in particular a coextruded laminate with the layer sequence LLDPE / PP / LLDPE or LLDPE / BOPP / LLDPE / LLDPE / BOPP / LLDPE. Document of value (1, 9, 17, 26) according to one of the Claims 1 to 14th wherein the plastic substrate (6, 14, 181, 30) of the document of value (1, 9, 17, 26) is a film / paper / film composite substrate or a paper / film / paper composite substrate. Document of value (1, 9, 17, 26) according to one of the Claims 1 to 16 , wherein the opaque, first ink-accepting layer (7, 15, 182, 31) and the opaque, second ink-accepting layer (8, 16, 183, 32) each have a filler and a binder and can optionally be present with different opacity. Document of value (1, 9, 17, 26) according to one of the Claims 1 to 17th , the value document (1, 9, 17, 26) being a bank note, in particular a polymer bank note or a film composite bank note, an identification document or a payment card.

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