WO2021089184A1

WO2021089184A1 - Value document

Info

Publication number: WO2021089184A1
Application number: PCT/EP2020/025482
Authority: WO
Inventors: Björn Teufel; Giselher Dorff; Christoph Gebauer
Original assignee: Giesecke+Devrient Currency Technology Gmbh
Priority date: 2019-11-06
Filing date: 2020-10-29
Publication date: 2021-05-14
Also published as: CA3154327A1; AU2020378537A1; DE102019007696A1; EP4054854A1

Abstract

The invention relates to a value document (1, 9, 17, 26), comprising a plastic substrate (6, 14, 181, 30) having a first surface and a second surface, an opaque first ink-receiving layer (7, 15, 182, 31) provided with a cut-out being arranged on the first surface of the plastic substrate (6, 14, 181, 30) and a second opaque ink-receiving layer (8, 16, 183, 32) provided with a cut-out being arranged on the second surface of the plastic substrate, the two cut-outs forming a window region (3, 11, 19, 28) of the value document (1, 9, 17, 26), the first surface of the plastic substrate (6, 14, 181, 30) having a first colour thin-layer element (4, 12, 20, 29), in the region of the opaque first ink-receiving layer (7, 15, 182, 31) provided with a cut-out.

Description

Document of value The invention relates to one based on a plastic substrate

Value document, wherein the plastic substrate has 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 in the area of the having an opaque, first ink-accepting layer provided with a recess a colored thin-film element.

Documents of value based on a plastic substrate, e.g. polymer banknotes or plastic banknotes, are known in the prior art, see e.g. the publication E.F. Prime, D.H. 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 achieve the To improve printability with printing ink. 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 subclaims.

Summary of the invention

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 recesses 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-accepting layer provided with a recess.

2. (Preferred embodiment) document of value according to paragraph 1, wherein the opaque, second, arranged on the second surface of the plastic substrate

Ink acceptance layer has an opaque ink acceptance layer area opposite the colored thin-film element formed on the first surface of the plastic substrate. 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, ie are congruent. 4. (Preferred embodiment) Value document according to one of paragraphs 1 to

3, wherein the recess of the opaque, first ink acceptance layer and the recess of the opaque, second ink acceptance layer have different dimensions, i.e. are arranged overlapping or a recess, in particular the recess of the opaque, second ink acceptance layer, is at least partially arranged within the further recess.

5. (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 ink-accepting layer provided with a recess, has smaller dimensions than the recess of the opaque, first ink-accepting layer, ie arranged within the recess of the opaque, first ink-accepting layer is.

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. (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, whereby the first motif and the second motif at the Viewing the value document at the normal angle on the first surface of the plastic substrate in the window area of the value document so that the second motif at least partially represents a background to the first motif.

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. (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. (Preferred embodiment) Document of value according to one of paragraphs 1 to 6, wherein the colored thin-film element is in the form of a first motif and the opaque, second ink-accepting layer on the side opposite the colored thin-film element is in the form of printing ink a second motif is printed, the first motif and the second motif when viewing the value document at the normal angle on the second surface of the plastic substrate in the window area of the value document so that the first motif at least partially represents a background to the second motif.

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. (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. (Preferred embodiment) Document of value according to one of paragraphs 1 to 11, wherein the colored thin-film element is connected to the first surface of the plastic substrate by means of an adhesive layer.

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 foil security element having a plastic substrate and is connected to the first surface of the plastic substrate by means of an adhesive layer.

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 is.

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. (Preferred embodiment) Value document 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 binder and can optionally be present with different opacity.

18. (Preferred embodiment) Value document according to one of paragraphs 1 to

17, the value document being 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 illumination of a document of value from one side and viewing of the document of value from another side, in particular 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 bank note, 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 known, for example, from WO 2009/080263 A2. 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 (for example a Si0 2} layer), which determines the distance between a semitransparent absorber layer (for example a Cr layer) and a reflective layer (for example 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.

As a colored thin-film element, a semitransparent thin-film element can also be used, 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 described in WO 2011/082761 A1. 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 Al 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 Al, 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 SiO 2 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 being particularly 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.

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 are 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.

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 to 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 in particular, opaque ink-accepting layer printed with a colored printing ink on the back of the document of value 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 referred to simply as "security element") can be provided, for example, starting from transfer ribbons with a large number of security elements designed as transfer elements or transfer patches. A characteristic of transfer ribbons is that the security elements are prepared on a carrier layer, whereby the order of the layers of the transfer elements is usually 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 from a heat-sealing adhesive or heat-sealing lacquer, which melts when the security elements are transferred and which bonds the security elements to the object to be secured layer placed on the object and pressed 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 ribbons and the transfer of Transfer elements on target substrates are described, for example, in EP 0420261 B1 and WO 2005/108108 A2.

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 pre-cut in the desired outline shapes and the pre-cut elements can then be transferred to products to be secured without the risk of tearing the carrier material is known from WO 2010/031543 A1. 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 these carrier substrates are in the In contrast to the "permanent" carrier substrate, they are not part of the security elements.

Preferred embodiments and advantages of the invention are explained below with reference to the schematically greatly simplified figures, the representation of which is true to scale and proportions was dispensed with in order to increase the clarity.

Show it:

FIGS. 1 and 2 show a first exemplary embodiment for the document of value according to the invention;

FIGS. 3 and 4 show a second exemplary embodiment for the document of value according to the invention;

FIGS. 5 and 6 show a third exemplary embodiment for the document of value according to the invention; Figures 7 and 8 one in the area of a paper recess with a

Paper bank note provided with a film security element according to a comparative example;

FIGS. 9 to 11 show a fourth exemplary embodiment for the document of value according to the invention;

Figure 12 shows an embodiment for a security element

Transfer material, based on which a colored thin-film element for the production of the document of value according to the invention can be provided; and

FIG. 13 shows 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.

FIG. 1 shows a first exemplary embodiment of a value document 1 according to the invention, in the example a bank note with the denomination "20", in plan view. The value document 1 comprises a value document substrate 2 based on plastic, which on its first surface and on its second surface each with The opaque ink acceptance layer is shown in a shade of gray in FIG. 1 and is based on an inorganic filler and a binder. Suitable ink acceptance 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, WO 2010/130755 A2 and WO 2012/003947 A1. Figure 1 shows the document of value 1 when viewed in plan view of the first surface. The document of value 1 has a window area 3, which is formed by cutouts in the opaque ink acceptance layers In the window area 3, the document of value 1 has above it he also has a colored thin-film element 4. In the present example, the colored thin-film element 4 is 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. The colored thin-film element comprises two semitransparent mirror layers, each with an Al layer, and a dielectric spacer layer, namely a SiCh 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 described, for example, in WO 2011/082761 A1. The Al / Si0 ₂ / Al layer system of the colored thin-film element 4 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 connected to the document of value substrate 2 by means of an adhesive layer. The viewer perceives the colored thin-film element 4 in a golden color when viewed in incident light and also sees an additional optically variable effect as a function of the viewing angle as a result of the hologram structure. The colored thin-film element 4 appears to the viewer in transmitted light in a bluish color. The colored thin-film element 4 is ring-shaped surrounded by a transparent window area.

The denomination “20” shown in FIG. 1 with the reference number 5 was applied to the value document 1 in a dark color by printing.

FIG. 2 shows the document of value 1 in a cross-sectional view along the dashed line shown in FIG. The view of the value document 1 illustrated in FIG. 1 in a plan view of the first surface of the value document 1 is illustrated with the block arrow “A”.

The value document substrate 1 comprises a plastic substrate 6, in the example a coextruded laminate with the layer sequence

FFDPE / BOPP / FFDPE / FFDPE / BOPP / FFDPE. The plastic substrate 6 is on its first surface and on its second surface each provided with a first opaque ink acceptance layer 7 and a second opaque ink acceptance layer 8, which have a recess in the window area 3. The colored thin-film element 4 is arranged in the window area 3 on the first surface of the plastic substrate 6. The reference number 5 shows the dark printing color with which the denomination “20” of the document of value 1 shown in FIG. 1 is generated.

FIG. 3 shows a second exemplary embodiment of a document of value 9 according to the invention, in the example a bank note, 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 shown in a shade of gray in FIG. 3 and is based on an inorganic filler and a binder. FIG. 3 shows the value document 9 when viewed in a plan view of the second surface. The value document 9 has a window area 11 which is formed by cutouts in the opaque ink acceptance layers. In the window area 11, the value document 9 also has a colored thin-film element 12. In the present example, the colored thin-film element 12 is 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 / S1O2 / Al layer system. The colored thin-film element 12 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 connected to the value document substrate 10 by means of an adhesive layer. The viewer takes the colored thin-film element 12 when viewing it 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 12 appears to the viewer in transmitted light in a bluish color. The colored thin-film element 12 is annularly surrounded by a transparent window area. In the central area 13, the document of value 9 has an additional area with an opaque ink acceptance layer, which can be printed with printing ink. The visual attractiveness of the colored thin-film element 12 is enhanced in this way.

FIG. 4 shows the value document 9 in a cross-sectional view along the dashed line shown in FIG. The block arrow “A” illustrates the view of the value document 9 illustrated in FIG. 3 in a plan view of the second surface of the value document 9.

The value document substrate 10 comprises a plastic substrate 14, in the example a coextruded laminate with the layer sequence

LLDPE / BOPP / LLDPE / LLDPE / BOPP / LLDPE. The plastic substrate 14 is provided on its first surface and on its second surface with a first opaque ink acceptance layer 15 and a second opaque ink acceptance layer 16, respectively, which have a recess in the window area 11. With the reference number 13, an additional area with an opaque ink-accepting layer is shown, which lies opposite the colored thin-layer element 12. The colored thin-film element 12 is arranged in the window area 11 on the first surface of the plastic substrate 14. As already mentioned, the value document 9 has in the area 13 an additional area with an opaque ink-accepting layer, which can be printed with printing ink. The visual attractiveness of the colored thin-film element 12 is evaluated in this way. FIG. 5 shows a third exemplary embodiment of a document of value 17 according to the invention, in the example a bank note, in plan view. The value document 17 comprises a value document substrate 18 based on plastic, which is on its first surface and on its second

Each surface is provided with an opaque ink-accepting layer. The opaque ink-accepting layer is shown in a shade of gray in FIG. 5 and is based on an inorganic filler and a binder. FIG. 5 shows the value document 17 when viewed in a plan view of the second surface. The value document 17 has a window area 19 which is formed by cutouts in the opaque ink acceptance layers. In the window area 19, the document of value 17 also has a colored thin-film element 20 in the shape of a sun and, in addition, sun rays 21 obtained with red printing ink. The colored thin-film element 20 in the present example is 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 / S1O2 / Al layer system. The colored thin-film element 20 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 connected to the value document substrate 18 by means of an adhesive layer. The viewer perceives the colored thin-film element 20 when viewed in incident light in a golden color and, as a function of the viewing angle, perceives an additional optically variable effect as a result of the hologram structure. The colored thin-film element 20 appears to the viewer in transmitted light in a bluish color. The colored thin-film element 12 is surrounded in the shape of a ring by a transparent window area. Due to the additional sun rays 21 in red Printing ink, the visual attractiveness of the colored thin-film element 20 is enhanced.

FIG. 6 shows the document of value 17 in a cross-sectional view along the dashed line shown in FIG. With the block arrow “A”, the view of the value document 17 illustrated in FIG. 5 in a plan view of the second surface of the value document 17 is clarified.

The value document substrate 17 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 provided on its first surface and on its second surface with a first opaque ink acceptance layer 182 and a second opaque ink acceptance layer 183, respectively, which have a cutout in the window area 19. The recesses are not congruent, but the recess in the second opaque ink acceptance layer 183 has smaller dimensions than the recess in the first opaque ink acceptance layer 182. The colored thin-film element 20 is arranged on the first surface of the plastic substrate 181 in the window area 19. The reference number 21 shows the red printing ink which in FIG. 5 generates the red rays of the sun.

FIG. 7 shows a paper bank note 22 provided with a foil security element 24 in the area of a paper recess 25 according to a comparative example. The paper bank note 22 is based on a paper substrate 23 which, in the dashed area 25, has a cutout produced by means of punching or laser cutting. The recess 25 is covered with a foil security element 24. The film security element 24 is based on a polyethylene terephthalate film with a UV embossing lacquer is provided with a hologram relief and a colored thin-layer element formed above the UV embossing lacquer with the layer sequence Al / S1O2 / Al. The film security element 24 is connected to the paper substrate 23 by means of an adhesive layer. The colored thin-film element with the layer sequence Al / S1O2 / Al is perceptible to the observer in a golden color when viewed in incident light and in a bluish color when viewed in transmitted light.

FIG. 8 shows the paper bank note 22 in a cross-sectional view along the dashed line shown in FIG. The arrangement shown in FIG. 8 shows that the document of value 22 in the paper recess 25 opposite the film security element 24 can only be printed with additional, print-technically available patterns with difficulty, so the person skilled in the art has relatively little design freedom with regard to the optical upgrading of the window area.

FIG. 9 shows a fourth exemplary embodiment of a document of value 26 according to the invention, in the example a bank note, in plan view. The value document 26 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 shown in a shade of gray in FIG. 9 and is based on an inorganic filler and a binder. FIG. 9 shows the value document 26 when viewed in a plan view of the first surface. The value document 26 has a window area 28 which is formed by cutouts in the opaque ink acceptance layers. In the window area 28, the document of value 26 also has a colored thin-film element 29 which, with respect to its circumference, partly extends beyond the window area 28. The colored thin-film element In the present example, 29 is 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 / S1O2 / 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 connected to the value document substrate 27 by means of an adhesive layer. The viewer perceives the colored thin-film element 29 when viewed in incident light in a golden color and also sees an additional optically variable effect as a function of the viewing angle as a result of 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 surrounded on its upper side and on its lower side in the shape of a crescent moon by a transparent window area.

FIG. 10 shows the document of value 26 in a cross-sectional view along the dashed line B-B 'shown in FIG. 9. The view of the value document 26 illustrated in FIG. 9 in a plan view of the first surface of the value document 26 is illustrated with the block arrow “A”.

The value document substrate 26 comprises a plastic substrate 30, in the example a coextruded laminate with the layer sequence

LLDPE / BOPP / LLDPE / LLDPE / BOPP / LLDPE. The plastic substrate 30 is provided on its first surface and on its second surface with a first opaque ink acceptance layer 31 and a second opaque ink acceptance layer 32, respectively, which have a recess in the window area 28. On the first surface of the plastic substrate 30 is im Window area 28, the colored thin-film element 29 is arranged. It can be seen from FIG. 10 that the recess in the second opaque ink acceptance layer 32 along the axis BB ′ in FIG. 9 is smaller than the recess in the first opaque ink acceptance layer 31, so that the colored thin-layer element 29 is partly covered by the second opaque ink acceptance layer 32 and in this way can be printed with printing ink. The visual attractiveness of the colored thin-film element 29 is evaluated in this way.

FIG. 11 shows the document of value 26 in a cross-sectional view along the dashed line C-C 'shown in FIG. The block arrow "A" illustrates the view of the document of value 26 illustrated in FIG. 9 in a plan view of the first surface of the document of value 26. It can be seen from FIG. 11 that the recess in the second opaque ink acceptance layer 32 along the axis CC ′ of FIG. 9 is congruent with the recess in the first opaque ink acceptance layer 31 along the axis CC 'of FIG.

In particular with reference to FIGS. 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 seen.

FIG. 12 shows an exemplary embodiment for a security element transfer material 33, starting from which a colored thin-layer element (for example with the reference number 4 in FIGS. 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 a carrier material containing the layers 34, 35 and 36 (= temporary carrier) and a layer Upper containing 37, 38, 39, 40 and 41. 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, as a temporary carrier, a polyethylene terephthalate (PET) film 34, which is inextricably connected to a further polyethylene terephthalate (PET) film 36 by means of an adhesive layer 35. The reference number 37 denotes a release layer. Adjacent to this is a primer lacquer 38, a colored thin-layer element 39 provided with cutouts with the layer sequence Al / S1O2 / Al, a UV embossing lacquer 40 and an adhesive layer 41 suitable for gluing to the plastic substrate of the document of value according to the invention.

In the course of the application of the upper material containing the colored thin-film element 39 to the plastic substrate of the value document according to the invention by means of the adhesive layer 41, the upper material is subsequently detached from the temporary carrier along the dashed line D-D 'shown in FIG. The upper material containing the layers 37, 38, 39, 40 and 41 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.

FIG. 13 shows a further exemplary embodiment for a security element transfer material 42, based on which a colored one Thin-film element (for example with the reference number 4 in FIGS. 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 a carrier material containing the layers 43 and 44 (= temporary carrier) and an upper material containing the layers 45, 46, 47, 48, 49 and 50. 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, as a temporary carrier, a coextruded film containing the layers 43 and 44, which are inextricably connected to one another along the boundary layer between the layers 43 and 44. The reference number 45 denotes a release layer. Adjacent to this is a colored thin-film element 46 provided with recesses with the layer sequence Al / S1O2 / Al, a UV embossing lacquer 47, an adhesive layer 48, a permanent film substrate 49 (in the example a PET film) and one for gluing to the Adhesive layer 50 suitable for the plastic substrate of the document of value according to the invention.

In the course of the application of the upper material containing the colored thin-layer element 46 to the plastic substrate of the inventive document of value by means of the adhesive layer 50, the upper material is subsequently detached from the temporary carrier along the dashed line E-E 'shown in FIG. The upper material containing the layers 45 to 50 has an additional, permanent film substrate 49 and thus has an increased layer thickness. In this way, documents of value can be achieved that are in Window area have an optically attractive design and, in view of the increased layer thickness in the window area, are also advantageous with regard to the haptic perception of the document of value. The above embodiments were made with regard to the

The plastic substrate of the document of value is merely an example of a coextruded laminate with the layer sequence

LLDPE / BOPP / LLDPE / LLDPE / BOPP / LLDPE related. Alternatively, of course, other plastic substrates that are known in the prior art can be used. Furthermore, instead of a pure polymer substrate, film composite substrates can also be used, e.g. a film / paper / film composite substrate, see e.g. WO 2004/028825 A2, or a paper / film / 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.

Claims

P a te n claims

1. 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) in the area of the opaque, first Ink acceptance layer (7, 15, 182, 31) has a colored thin-film element (4, 12, 20, 29).

2. Document of value (1, 9, 17, 26) according to claim 1, wherein the on the second surface of the plastic substrate (6, 14, 181, 30) arranged, opaque, second ink acceptance layer (8, 16, 183, 32) one of the 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).

3. 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.

4. Document of value (1, 9, 17, 26) according to one of 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 of the opaque, second ink-accepting layer (8, 16, 183, 32), is at least partially arranged within the further recess.

5. Document of value (1, 9, 17, 26) according to one of claims 1 to 4, wherein the colored thin-film element (4, 12, 20, 29) which is on the first surface of the plastic substrate (6, 14, 181, 30) is formed in the region of the opaque, first ink acceptance layer (7, 15, 182, 31) provided with a recess, smaller dimensions than the recess of the opaque, first ink acceptance layer (7, 15, 182, 31), ie within the recess of the opaque , first ink acceptance layer (7, 15, 182, 31) is arranged.

6. Document of value (1, 9, 17, 26) according to one of claims 1 to 4, wherein the colored thin-film element (4, 12, 20, 29) which is on the first surface of the plastic substrate (6, 14, 181, 30) is formed in the area of the opaque, first ink acceptance layer (7, 15, 182, 31) provided with a recess, 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.

7. Document of value (1, 9, 17, 26) according to one of claims 1 to 6, 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 one opposite the colored thin-film element (4, 12, 20, 29) Page 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) in the Complete 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.

8. Document of value (1, 9, 17, 26) according to one of claims 1 to 6, 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) is formed on the side opposite the colored thin-film element (4, 12, 20, 29) 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.

9. Document of value (1, 9, 17, 26) according to one of claims 1 to 6, wherein the colored thin-layer element (4, 12, 20, 29) is in the form of a first motif and the opaque, second ink-accepting layer (8, 16 , 183, 32) on the side opposite the colored thin-film element (4, 12, 20, 29) 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 first 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 second motif at least partially provides a background to the first motif represents.

10. Document of value (1, 9, 17, 26) according to one of claims 1 to 6, wherein the colored thin-layer 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 side opposite the colored thin-film element (4, 12, 20, 29) 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 provides a background to the second motif represents.

11. Value document (1, 9, 17, 26) according to one of claims 1 to 8, 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 comprising a reflective layer, a dielectric spacer layer and an absorber layer.

12. Document of value (1, 9, 17, 26) according to one of claims 1 to 11, wherein the colored thin-film element (4, 12, 20, 29) is a semitransparent thin-film element that a viewer when viewing in incident light and when viewing Conveys a different color impression in transmitted light, for example a thin-film element which has two semitransparent mirror layers and a dielectric spacer layer arranged between the two mirror layers.

13. Document of value (1, 9, 17, 26) according to one of 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 ) connected is. 14. Value document (1, 9, 17, 26) according to one of claims 1 to 13, wherein the colored thin-film element (4, 12, 20, 29) is formed in the form of a film security element having a plastic substrate and by means of an adhesive layer with the first surface of the plastic substrate (6,

14, 181, 30) is connected.

15. Document of value (1, 9, 17, 26) according to one of claims 1 to 14, wherein the plastic substrate (6, 14, 181, 30) of the document of value (1, 9, 17, 26) is based on polyethylene, terylene, polyvinyl chloride, Polypropylene, biaxially oriented polypropylene or based on a film or a coextruded laminate with several of the aforementioned materials, in particular a coextruded laminate with the layer sequence LLDPE / PP / LLDPE or LLDPE / BOPP / LLDPE / LLDPE / BOPP / LLDPE.

16. Document of value (1, 9, 17, 26) according to one of claims 1 to 14, 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.

17. Document of value (1, 9, 17, 26) according to one of claims 1 to 16, wherein the opaque, first ink acceptance layer (7, 15, 182, 31) and the opaque, second ink acceptance layer (8, 16, 183, 32) each have a filler and a binder and can optionally be present with different opacity.

18. Document of value (1, 9, 17, 26) according to one of claims 1 to 17, wherein the document of value (1, 9, 17, 26) is a bank note, in particular a Polymer banknote or a film composite banknote, an identification document or a payment card.