DE102018004438A1 - Security element for securing value documents - Google Patents

Abstract

The invention relates to a security element for securing security papers, documents of value and other data carriers, wherein the security element (1) has a substrate (2) on which a first and a second layer (4, 5) are formed in the register, one having magnetic pigments third layer (6) is formed at least in part on the first and / or second layer (4, 5), the first layer (4) having first pigments and the second layer (5) second pigments, the first and the second Layer are designed so that they show different colors when illuminated with light from the visible wavelength range and / or different colors when illuminated with UV radiation.

Description

The invention relates to a security element for securing security papers, value documents, such as banknotes, checks or the like, and other data carriers.

Data carriers, such as valuables or identity documents, but also other valuables, such as branded goods, are often provided with security elements for the purpose of security, which permit verification of the authenticity of the data carrier and at the same time serve as protection against unauthorized reproduction. The security elements may, for example, be in the form of a security thread embedded in a banknote, a covering sheet for a banknote with a hole, an applied security strip, a self-supporting transfer element, in the form of a feature area printed directly on a document of value or as a product securing element, e.g. be designed as a label, seal or packaging.

On the one hand, such security elements should have an optically easily perceptible effect, which on the other hand should be difficult to copy or imitate. In addition, it is often required that the manufacturing costs for such a security element are minimized.

Proceeding from this, it is therefore an object of the invention to provide a security element for securing security papers, documents of value, such as banknotes, checks or the like, and other data media that provides a visually good perceiving effect, difficult to copy or imitate and at the same time cost can be produced.

This object is solved by the features of the independent claims. Advantageous embodiments are specified in the dependent claims.

According to the invention, the security element has a substrate on which a first and a second layer are formed in the register, wherein a third layer comprising magnetic pigments is formed at least partly on the first and / or second layer, wherein the first layer comprises first pigments and the second Layer second pigments, and wherein the first and the second layer are formed so that they show different colors when illuminated with light from the visible wavelength range and / or different colors when illuminated with UV radiation.

The first layer advantageously has at least one first luminescent feature substance and the second layer at least one second luminescent feature substance.

The first and second pigments may be platelet-shaped and / or iridescent pigments. In particular, these pigments may be metal oxide coated or coated platelets (eg, mica platelets). Layers of such pigments are also often referred to as iriodine coatings or layers. One can also speak of an iriodin color or a structure color. The application of paints with such pigments is described, for example, in the publications EP 0 490 825 A1 such as EP 2 454 413 B1 whose contents are incorporated herein by reference.

Furthermore, the first pigments may be in the form of partially transparent pigments or partially translucent pigments (in each case for the visible wavelength range). The same applies to the second pigments.

In an advantageous embodiment, the first and second pigments can also be designed such that they exhibit different colors when illuminated with light from the visible wavelength range and / or different colors when illuminated with UV radiation. In particular, the first and pigments can be formed as phosphorescent or fluorescent pigments.

Lighting with light from the visible wavelength range is understood to mean, in particular, illumination with wavelengths from the range of 380 nm to 780 nm or 390 nm to 780 nm. Under UV illumination is understood radiation having a wavelength of less than 380 nm to about 200 nm. In particular, the UV illumination can range from 235 nm to less than 380 nm.

Since the third layer is formed at least in part on the first and / or second layer (and preferably completely on the first and / or second layer), the third layer may have a very smooth surface with low porosity compared to, for example, a fibrous or porous substrate can be provided. In this way, advantageously, a better adhesion of the third layer and / or a lower ink consumption for the formation of the third layer can be achieved.

The first and second layers may be formed adjacent to one another, alternately not next to each other and / or interlaced. In an advantageous embodiment, it is provided that the first and second layers adjoin one another directly. Preferably, the first and second layers can provide overall information For example, convey their shape and / or their different colors. This can be, for example, a text, a pattern, a picture, etc.

In the case of the security element according to the invention, the first and the second layer can be designed such that they show the same first color when illuminated with light from the visible wavelength range and the first layer when illuminated with UV radiation has a second color and the second layer when illuminated UV radiation shows a third color, with all three colors being different. This can e.g. be realized in that the first and second layers have the same visible color (e.g., Iriodin®) but different feature substances (e.g., fluorescence).

Furthermore, the security element according to the invention can be designed so that the first layer when illuminated with light from the visible wavelength range, a first color, that the second layer when illuminated with light from the visible wavelength range, a second color and that the first and the second layer when illuminated show the same third color with UV radiation, all three colors being different.

Furthermore, the security element can be designed such that the first layer, when illuminated with light from the visible wavelength range, shows a first color, the second layer, when illuminated with light from the visible wavelength range, shows a second color, the first layer, when illuminated with UV Radiation shows a third color and that the second layer when illuminated with UV radiation shows a fourth color, with all four colors differ.

In an advantageous embodiment, the first and / or the second layer are formed so that they emit luminescence radiation of different colors when illuminated with UV radiation at different UV excitation wavelengths. For example, the first or the second layer can show a green color in the case of radiation of a wavelength of 365 nm and an orange or reddish color in the case of radiation of a wavelength of 254 nm.

In a likewise advantageous embodiment, when illuminated with light from the visible wavelength range and / or when illuminated with UV radiation, the third layer exhibits a different color than the first and second pigments when illuminated with light from the visible wavelength range or when illuminated with UV light. Radiation.

The magnetic pigments may have, for example, reflective properties. If a suitable magnetic field is applied before the drying of the binder of the applied third layer, a desired alignment of the magnetic pigments and thus a corresponding optical effect can be provided because the position and orientation of the magnetic pigments can not be changed after drying the binder of the third layer is.

The magnetic pigments are preferably magnetic pigments or magnetizable pigments. In particular, they may have ferromagnetic properties. Furthermore, the magnetic pigments may be formed and / or oriented as shown in the references EP 2 792 500 A1 . US 6,875,522 B2 and or US 7,517,578 B2 is described.

The invention also includes a data carrier with a security element of the type described. In an advantageous embodiment, the security element is at least partially applied over a transparent window region of the data carrier.

Advantageously, said data carrier is a value document, such as a banknote, in particular a paper banknote, a polymer banknote or a film composite banknote, a share, a bond, a certificate, a coupon, a check, a certificate, a tax stamp, a high-quality admission ticket or a trademark protection element, but also to an identification card, such as a credit card, a bank card, a cash card, an authorization card, a health card, an identity card or pass personalization page.

Further provided is a method of manufacturing a security element for security papers, value documents such as banknotes, checks or the like, and other data carriers in which a first and a second layer are formed on a substrate in the register, a third layer having magnetic pigments at least in part on the first one and / or the second layer, wherein the first layer comprises first pigments and the second layer comprises second pigments, and the first and the second layer are formed so that when illuminated with light from the visible wavelength range different colors and / or upon illumination UV radiation show different colors.

It is understood that the features mentioned above and those yet to be explained below can be used not only in the specified combinations but also in other combinations or alone, without departing from the scope of the present invention.

• 1 eine Draufsicht auf die Oberseite eines erfindungsgemäßen Sicherheitselementes gemäß einem ersten Ausführungsbeispiel bei Beleuchtung mit Licht aus dem sichtbaren Wellenlängenbereich;
• 2 eine Schnittansicht entlang der Schnittlinie A-A von 1;
• 3 eine Draufsicht auf die Oberseite des Sicherheitselementes gemäß 1 bei UV-Beleuchtung;
• 4 eine Draufsicht auf die Oberseite des erfindungsgemäßen Sicherheitselementes gemäß einem zweiten Ausführungsbeispiel bei Beleuchtung mit Licht aus dem sichtbaren Wellenlängenbereich;
• 5 eine Draufsicht auf die Oberseite des Sicherheitselementes gemäß 4 bei UV-Beleuchtung;
• 6 eine Draufsicht auf die Oberseite des erfindungsgemäßen Sicherheitselementes gemäß einem dritten Ausführungsbeispiel bei Beleuchtung mit Licht aus dem sichtbaren Wellenlängenbereich, und
• 7 eine Draufsicht auf die Oberseite des Sicherheitselementes gemäß 6 bei UV-Beleuchtung.

The invention will be explained in more detail by means of embodiments with reference to the accompanying drawings, which also disclose features essential to the invention. For better clarity, the drawings discard, at least in part, a representation true to scale and proportion and hatching. These embodiments are merely illustrative and are not to be construed as limiting. For example, a description of an embodiment having a plurality of elements or components is not to be construed as requiring all of these components or elements for implementation. Rather, other embodiments may also include alternative elements or components, fewer elements or components, or additional elements or components. Elements or components of various embodiments may be combined with each other unless otherwise specified. Modifications and modifications described for one of the embodiments may also be applicable to other embodiments. To avoid repetition, the same or corresponding elements in different figures are denoted by the same reference numerals and not explained several times. Show it:

• 1 a plan view of the top of a security element according to the invention according to a first embodiment when illuminated with light from the visible wavelength range;
• 2 a sectional view along the section line AA from 1 ;
• 3 a plan view of the top of the security element according to 1 in UV illumination;
• 4 a plan view of the top of the security element according to the invention according to a second embodiment when illuminated with light from the visible wavelength range;
• 5 a plan view of the top of the security element according to 4 in UV illumination;
• 6 a top view of the top of the security element according to the invention according to a third embodiment when illuminated with light from the visible wavelength range, and
• 7 a plan view of the top of the security element according to 6 with UV illumination.

In the in the 1 and 2 embodiment shown comprises the security element according to the invention 1 a substrate 2 with a top 3 , on the register in the first and a second layer 4 . 5 are formed. On a part of the first and second layer 4 . 5 , in particular in the sectional view according to 2 is apparent, is a third layer 6 educated.

In the embodiment described here, the security element 1 a first subject area 7 in which the third layer 6 is formed, and a second motif area 8th on. The first subject area 7 is essentially in the form of the state of Bavaria. In the second motif area 8th are three symbols 9 . 10 . 11 shown. The symbols 9 to 11 could also be a number, a text or an alphanumeric expression.

1 shows the case where the security element 1 is illuminated with light from the visible wavelength range. The hatch should be a color that is then visible to a viewer. It may be, for example, the color green. So the three symbols appear 9 to 11 as well as the first subject area 7 with the exception of the third layer 6 for the viewer (uniformly) green.

The third layer 6 has magnetic pigments that have been aligned during manufacture so that the number " 7 "Brightly illuminates in front of a circular gray background.

In 3 now the colors perceptible to the viewer are shown schematically when the security element 1 illuminated with UV radiation. In this case, areas of the first layer appear 4 blue (here shown in black) and appear areas of the second layer 5 White. This provides a surprising color effect that is very memorable and easily verifiable for the viewer.

To achieve this color effect, the first layer contains 4 first pigments, preferably first partially transparent pigments, as well as first luminescent feature substances, and contains the second layer 5 second pigments, preferably second partially transparent pigments, as well as second luminescent feature substances. The first and second partially transparent pigments and the feature substances respectively contained in the first and second layers are formed so that the first and second layers 4 . 5 when illuminated with visible light are perceivable in green color and when illuminated with UV radiation blue (the layer 4 with the first partially transparent pigments and the first luminescent feature substance) or white (the layer 5 with the second partially transparent pigments and the second luminescent feature substance) are perceptible.

Because the third layer 6 on areas of the first and second layer 4 . 5 is formed, the first and second layers 4 . 5 also as background layers or as primer layers 4 . 5 be designated. Especially with fibrous or porous substrates 2 bring these primer layers 4 . 5 the advantage of having less material for the third layer 6 is needed to achieve the desired effect, compared to the case where the third layer 6 directly on the substrate 2 would be trained. This leads to lower production costs.

The two primer layers 4 . 5 are preferably printed in two registered print runs. In particular, screen printing can be used as the printing technique. However, it is also possible to use flat, gravure, high, digital printing or combinations thereof.

The substrate may be a paper substrate. However, it is also possible to provide a polymer substrate or a composite film substrate or combinations of the aforementioned types of substrate.

The security element 1 can itself be the value document to be produced. It is also possible that the security element is designed as a thread, foil, transfer element, strip and / or patch, which is then connected to a substrate of the value document to be produced.

The security elements can be present in an opaque subarea of the value document, or be arranged wholly or partly in a transparent window area of the value document. The transparent window region can also consist of a transparent partial region of a polymer substrate or of a composite film substrate of the security document to be secured, to which the first and second layers are at least partially applied.

The production of the third layer 6 is carried out in a known manner. The third layer may be formed by known methods (eg one of the printing techniques associated with the first and second layers 4 . 5 are described) are printed. Before drying the binder of the printed third layer 6 For example, by UV exposure, the third layer 6 a predetermined magnetic field, resulting in a desired orientation of the magnetic pigments in the third layer 6 leads to then the schematically shown effect in the dried state of the third layer 6 provide. Once the third shift 6 is dried, the position and orientation of the individual magnetic pigments in the third layer 6 no longer be changed, so that the set effect is permanently available.

The first and second pigments may be, for example, pearlescent pigments. In particular, the first and second pigments may be thin platelets (eg of the mineral mica) which are coated by a thin metal oxide layer or coated with a thin metal oxide layer. As a result, semi-transparent pigments are provided which correspond to the respective layer 4 . 5 give a shine coming from the depth.

In addition, the first and second pigments may also be luminescent, particularly preferably phosphorescent or fluorescent.

When in conjunction with the 1 to 3 described first embodiment, the first and second layers 4 . 5 when illuminated with light from the visible wavelength range the same color and have the two layers 4 . 5 with UV lighting different colors. However, it is also possible the first and second layer 4 . 5 in such a way that they have different colors (eg light blue and white) when illuminated with light from the visible wavelength range, as in 4 is indicated. Light blue is represented by the hatching. White is represented by a white (unshaded) representation.

When illuminated with UV radiation, however, the first and second layers on the other hand, the same color (for example, red or yellow), which by the dot matrix in 5 is shown schematically.

In a third embodiment, the shape of the first motif area 7 different from the first and second embodiments. In the third embodiment, the first motif area 7 rectangular. Also, the arrangement of the first and second layer 4 . 5 is different in comparison to the already described embodiments.

In the third embodiment, the perceptible colors of the first and second layers are different 4 . 5 both when illuminated with light from the visible wavelength range as well as when illuminated with UV radiation, so that a total of four different colors are visible. When illuminated with light from the visible wavelength range, the first layer appears to the viewer 4 green (shown diagonally hatched) and the second layer 5 yellow (shown without hatching). When illuminated with UV radiation, the first layer appears 4 red (represented by vertical hatching) and the second layer 5 orange (represented by horizontal hatching).

LIST OF REFERENCE NUMBERS

1

security element

2

substratum

3

top

4

1st shift

5

2 layer

6

3 layer

7

1st motif area

8th

2nd motif area

9

1. Icon

10

2. Icon

11

3. Icon

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been 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.

Cited patent literature

• EP 0490825 A1 [0008]
• EP 2454413 B1 [0008]
• EP 2792500 A1 [0020]
• US 6875522 B2 [0020]
• US 7517578 B2 [0020]

Claims (16)

Security element for securing security papers, value documents, such as banknotes, checks or the like, and other data carriers, wherein the security element (1) comprises a substrate (2) on which a first and a second layer (4, 5) are formed in the register, wherein a third layer (6) having magnetic pigments is formed at least in part on the first and / or second layer (4, 5), wherein the first layer (4) comprises first pigments and the second layer (5) second pigments, wherein the first and second layers are configured to exhibit different colors when illuminated with light from the visible wavelength range and / or different colors when illuminated by UV radiation. Security element after Claim 1 in which the first layer has at least one first luminescent, in particular phosphorescent or fluorescent feature substance, and the second layer has at least one second luminescent, in particular phosphorescent or fluorescent feature substance. Security element after Claim 1 or 2 in which the first and / or second pigments are platelet-shaped and / or iridescent pigments. A security element according to any one of the preceding claims, wherein the first and / or second pigments are coated with metal oxide. Security element according to one of the above claims, wherein the first and / or second pigments are formed in the visible wavelength region partially transparent or partially translucent. A security element according to any one of the preceding claims, wherein the first and second pigments are adapted to exhibit different colors when illuminated with light from the visible wavelength range and / or different colors when illuminated by UV radiation. Security element according to one of the above claims, in which the magnetic pigments are platelet-shaped. A security element according to the preceding claims, wherein the first and second layers are configured to exhibit the same first color when illuminated with light from the visible wavelength range, and the first layer, when illuminated by UV radiation, has a second color and the second layer when illuminated with UV radiation shows a third color, with all three colors differ. Security element according to one of Claims 1 to 7 in which the first and the second layer are formed so that the first layer when illuminated with light from the visible wavelength range, a first color, the second layer when illuminated with light from the visible wavelength range, a second color, the first layer when illuminated UV radiation a third color and the second layer when illuminated with UV radiation shows a fourth color, all colors differ from each other. A security element according to any one of the preceding claims, wherein the first and / or the second layer are formed so that they emit luminescent radiation of different colors when illuminated with UV radiation at different UV excitation wavelengths. A security element according to any one of the preceding claims, wherein the third layer exhibits a different color when illuminated with light from the visible wavelength range and / or when illuminated with UV radiation than the first and second pigments when illuminated with light from the visible wavelength range Illumination with UV radiation. A security element according to any one of the preceding claims, wherein the magnetic pigments are reflective pigments. A security element according to any one of the preceding claims, wherein the magnetic pigments are partially differently oriented magnetic pigments. Disk with a security element according to one of Claims 1 to 13 , Disk after Claim 14 in which the security element is at least partially applied over a transparent window area of the data carrier. Method for producing a security element for security papers, value documents such as banknotes, checks or the like, and other data carriers in which a first and a second layer (4, 5) are formed in register on a substrate (2), a third layer (6) having magnetic pigments ) is formed at least in part on the first and / or second layer (4, 5), the first layer (4) having first pigments and the second layer (5) second pigments and the first and the second layer being formed that when lighting with light from the visible wavelength range different colors and / or different colors when illuminated with UV radiation.

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