Security element comprising a printed image with three-dimensional effect
阅读说明:本技术 包括具有三维效果的印刷图像的防伪元件 (Security element comprising a printed image with three-dimensional effect ) 是由 J.努涅斯 O.穆勒 于 2018-06-22 设计创作,主要内容包括:本发明涉及一种用于制造具有三维效果的图案(10)的物理防伪元件的方法。提供载体(1)和至少一个透明覆层(8、9)。在载体(1)上施加设计层(3)。载体(1)在热量下的尺寸稳定性低于覆层(8)的尺寸稳定性,或者覆层(9)在热量下的尺寸稳定性低于载体(1)的尺寸稳定性。设计层(3)在压力的作用下可变形。在载体(1)与覆层(8)之间布置透明结构层,所述结构层形成图案(10)。结构层(5)在热量下的尺寸稳定性高于载体(1)或覆层(9)的尺寸稳定性。在压力和热量的作用下对载体(1)和层(3、5、8、9)进行层压。在层压过程期间,结构层(5)被压入载体(1)中或压入覆层(9)中,由此设计层(3)按照由结构层(5)形成的图案(10)的方式发生变形,并且结构层(5)在该结构层的边缘区域(15)中发生变形,使得该结构层的表面(17、18)在横截面中沿切向靠拢。(The invention relates to a method for producing a physical security element having a three-dimensional design (10). A carrier (1) and at least one transparent coating (8, 9) are provided. A design layer (3) is applied to the carrier (1). The dimensional stability of the carrier (1) under heat is lower than the dimensional stability of the coating (8), or the dimensional stability of the coating (9) under heat is lower than the dimensional stability of the carrier (1). The design layer (3) is deformable under the action of pressure. A transparent structural layer is arranged between the carrier (1) and the cover layer (8), said structural layer forming a pattern (10). The dimensional stability of the structural layer (5) under heat is higher than the dimensional stability of the support (1) or the coating (9). The carrier (1) and the layers (3, 5, 8, 9) are laminated under the action of pressure and heat. During the lamination process, the structural layer (5) is pressed into the carrier (1) or into the cover layer (9), whereby the design layer (3) is deformed in the manner of a pattern (10) formed by the structural layer (5), and the structural layer (5) is deformed in the edge region (15) of the structural layer such that the surfaces (17, 18) of the structural layer come together tangentially in cross section.)
1. A method for manufacturing a physical security element having a pattern (10) with a spatial appearance, comprising the steps of:
-providing a carrier (1),
-providing at least one see-through transparent coating (7, 8),
-applying a design layer (3) on a carrier (1),
-wherein the dimensional stability of the carrier (1) under heat is lower than the dimensional stability of the coating (7) or the dimensional stability of the coating (8) under heat is lower than the dimensional stability of the carrier (1),
-wherein the design layer (3) is deformable under pressure,
-arranging a see-through transparent structural layer (5) between the carrier (1) and the cover layer (7) to form a pattern (10), wherein the dimensional stability of the structural layer (5) under heat is higher or similar to the dimensional stability of the carrier (1) or the cover layer (7, 8),
-laminating the carrier (1) and the layers (3, 5, 7, 8) under pressure and heat,
the method is characterized in that:
during the lamination, the structural layer (5) is pressed into the carrier (1) or into the coating (8) via the carrier (1), whereby the design layer (3) is deformed according to the pattern (10) formed by the structural layer (5), and whereby the structural layer (5) is reshaped in its edge region (15) such that the surfaces (17, 18) of the structural layer (5) in cross section are brought together tangentially.
2. The method according to claim 1, characterized in that the design layer (3) has a thickness which does not change at all or changes slightly at most, i.e. changes by 10% at most, during the deformation.
3. Method according to claim 1, characterized in that the dimensional stability of the carrier (1) under heat is lower than the dimensional stability of the design layer (3), the cover layer (7) and the structural layer (5), and in that the structural layer (5) is arranged between the design layer (3) and the cover layer (7), so that during lamination the design layer (3) is pressed into the carrier (1) by the structural layer (5), wherein the structural layer (5) is lenticular reshaped in its edge region (15) such that the surface (17) of the structural layer facing the top layer (7) and the surface (18) of the structural layer facing the design layer come together tangentially at the edges.
4. Method according to claim 1, characterized in that the design layer (3) is applied to the side (6) of the carrier (1) facing away from the surface and a further cover layer (8) is arranged thereon, wherein the dimensional stability of the further cover layer (8) under heat is lower than the dimensional stability of the design layer (3), the cover layer (7), the carrier (1) and the structural layer (5), and the structural layer (5) is arranged between the carrier (1) and the cover layer (7), so that during lamination the design layer (3) and the carrier (1) are pressed by the structural layer (5) into the further cover layer (8), wherein the structural layer (5) is lenticular reshaped in such a way that a surface (17) of the structural layer (5) facing the cover layer (8) and a surface (18) of the structural layer facing the design layer come together tangentially at their edge regions (15).
5. A method as claimed in claim 1, characterized in that the structural layer (5) is applied as a lacquer layer to the design layer (3) and/or the cover layer (7).
6. A method as claimed in claim 5, characterized in that the paint layer (5) is hardened.
7. The method according to claim 1, characterized in that the design layer (3) is a metallic ink and/or is applied to the carrier (1) before lamination.
8. A method as claimed in claim 1, characterized in that the surface (18) of the structural layer (5) facing the design layer is raised towards the surface (17) facing the cladding.
9. The method according to claim 1, characterized in that the design layer (3) has a thickness of 5 to 25 microns and/or is applied in the form of at least two layers (13, 14) having different material properties.
10. The method according to claim 1, characterized in that the structural layer (5) has a thickness of 25 to 125 microns.
11. The method according to claim 1, characterized in that the coating (7, 8) has a thickness of 50 to 200 microns.
12. Physical security element carrying a pattern (10) with a spatial appearance, having a carrier (1) on which a design layer (3), a transparent, see-through structural layer (5) and a transparent, see-through cover layer (7) are formed, wherein the structural layer (5) covers only a part of the security element and the pattern (10) is formed wholly or partially by the structural layer (5),
the method is characterized in that the structural layer (5) is pressed into the carrier (1) and a lenticular reshaping takes place in the edge regions (15) thereof, so that the surfaces of the structural layer (5) are brought together tangentially in the edge regions (15), and the design layer (3) is also pressed into the carrier (1) by means of the structural layer (5), the design layer (3) being deformed according to the pattern (10) in the structural layer (5).
13. A security element according to claim 12, characterized in that the thickness of the design layer (3) in the deformed region is the same as in the remaining region or is almost the same except for a maximum deviation of 10%.
14. The security element of claim 12, configured in the form of a card of standard format.
Technical Field
The invention relates to a method for producing a physical security element having a printed image with a spatial appearance and to a corresponding security element. In particular, the invention relates to a card, such as a credit card or payment card, made of plastic having a spatially printed image forming a security feature.
Background
EP 2593314B 1 discloses a method for manufacturing a plastic card with a printed image, wherein a coating layer comprising metallic, organic or non-organic pigments is first printed on a substrate. A layer of paint is printed on the coating layer which forms a pattern and is thinner than the coating layer. The paint layer is cured. The coating has higher plasticity than the paint. A coating is applied over the paint layer. The construction is then laminated under pressure and temperature. During the lamination process, the harder paint is pressed completely into the softer paint and the paint retains its shape. Embedding the paint in the coating in this manner makes the visibility of the pattern formed by the paint dependent on the viewing angle. The manufacture of the coating in this known method requires the use of special materials and the execution of special steps, which complicates the execution of the method. Furthermore, the depth to which the paint can penetrate into the coating is limited by its height. This depth is typically very small compared to the height of the substrate.
US 7455235B 2 discloses a method for manufacturing a chip card with a visual relief effect. According to this method, the entire layer of metal ink is applied on the core layer. A lacquer layer of greater thickness is applied over the layer of metallic ink to form a pattern. The lacquer layer is hardened with uv light, followed by the application of a thicker coating. The construction was then laminated. During the lamination process, the paint layer becomes dull, while the areas of the card not covered by the paint layer remain bright. This results in a three-dimensional effect. The local additional height caused by the lacquer layer is compensated by the coating. The resulting dim area appears to be engraved into the card surface. This known solution provides a separate card feature. However, this feature is not easily combined with other card features and requires the construction of a sufficiently flexible and thick overlay.
EP 2886357 a2 discloses a security document with a security feature which is composed of a plurality of foils laminated together, based on a relief structure and which produces a three-dimensional effect. The relief structure is produced by means of an embossing lacquer and/or by embossing the surface of the foil carrying the embossing lacquer.
WO 2004/065135 a1 discloses a method for producing three-dimensional images on card bodies, in which a reflective layer is first of all formed on the rear side of a transparent core layer and an image-forming material which can be pressed into the core layer is applied thereon. Applying a transparent overlay over the image-forming material. The resulting layer structure is laminated into the card body. This presses the image-forming material into the reflective and core layers and creates an embedded image. When subsequently viewed from the front side of the core layer, enhanced reflections are generated at the contour edges of the resulting embedded image, which reflections achieve a three-dimensional visual effect.
Disclosure of Invention
The object of the present invention is to provide a method for producing a pattern with a spatial appearance on a security element, which method is carried out without any special requirements as to the materials used or the method steps to be carried out and which provides a feature which can be easily combined with other features.
This object is achieved by a method and a security element having the features of the independent claims.
The advantage of the method according to the invention is that it can be carried out using common manufacturing methods and that there are no higher requirements on the material to be used. The method provides in a simple manner shapes and symbols having a spatial appearance. The features producible by this method are particularly suitable for ordinary payment cards, credit cards and identification cards.
A particular advantage of the method according to the invention is that other structural parts of the security element which are provided specifically for the purpose of producing the features are not damaged or impaired when the method is carried out. In particular, the layers forming the features are not damaged during the card manufacturing process.
The method of the invention is based on a way of constructing a structural layer comprising a pattern on a multi-layer security element. The structural layer is pressed into the core layer of the security element by lamination, whereby the design layer connected to the core layer is also deformed. At this time, the thickness of the design layer is not changed, or is changed only slightly. By deformation of the design layer, the pattern contained in the structural layer becomes recognized as an image structure that is spatially perceivable.
In a particularly advantageous configuration, the structural layer is applied as a lacquer layer by a printing method. The lacquer used is preferably transparent.
Further advantageous refinements and advantageous configurations of the method according to the invention result from the features of the dependent claims.
Drawings
Embodiments of the present invention will be described in more detail hereinafter with reference to the accompanying drawings.
In the drawings:
figure 1 shows in a partial perspective view a card equipped with a plurality of features,
figure 2 shows the components to be joined prior to connection by an exemplary card,
figure 3 shows a detail of the card after connection made with the parts shown in figure 1,
figure 4 is a plan detail view of the finished card shown in figure 1 or figure 2,
FIG. 5 shows a variant of the method shown in FIG. 1 before the connection, and
fig. 6 shows the situation after the connection of a card manufactured according to the variant of fig. 4.
Detailed Description
The method of the invention is illustrated below by way of example in a plastic card of standard format, as such cards are commonly used as payment cards, credit cards or identification cards. Fig. 1 shows, by way of example, a chip card whose geometry corresponds, for example, to the ISO7810 standard. However, the method is not limited to plastic cards, but is generally suitable for physical security elements consisting of multiple layers joined under pressure and heat and having a printable surface (e.g., a label, logo, or package).
Fig. 1 shows a card with a
Fig. 2 shows a first variant embodiment of a method for producing a
A
In an alternative embodiment, the
As shown in fig. 2, the
In the exemplary embodiment of fig. 2, the
As an alternative to a lacquer layer, the
A
The
The
The
Also, the
During lamination, the
The
During lamination, the
Fig. 3 shows the resulting card structure after laminating the components shown in fig. 2 together. In the area of the
The gentle transition between the region with the
Fig. 4 illustrates this spatial effect. The figure shows a
Fig. 5 and 6 show a variant embodiment of the method, in which the
During lamination of the construction shown in fig. 5, the
On the rear side 6, the
In contrast to the exemplary embodiment of fig. 2, in the variant shown in fig. 5, the
The method allows a series of reasonable and obvious variations on the basic idea of constructing a spatially
List of reference numerals
1 vector
3 design layer
5 structural layer
6 side facing away from the support
7 coating layer
8 another coating
10 pattern
11 surface of the carrier
12 the other surface of the carrier
13 base layer of design layer
14 optical layer of design layer
15 edge region of the structural layer
16 internal region of structural layer
17 surface of the structural layer
18 another surface of the structural layer
19 recess
20 card
Surface of 21 card
22 card another surface
23 letters
24 security feature
25 chip