EP3971872A1 - Tamper evident security element - Google Patents

Abstract

The invention relates to a security element (1), in particular a security label or security adhesive tape, with tamper evidence, comprising a carrier substrate (2) and a self-adhesive layer (3) arranged on the carrier substrate (2). It is provided that a partial separating layer (5) is formed on the side (4) of the carrier substrate (2) facing the self-adhesive layer (3) and that between the carrier substrate (2) and the self-adhesive layer (3) and between the partial separating layer ( 5) and the self-adhesive layer (3) a deformable layer (6) is formed. The deformable layer (6) has greater elasticity than the partial separating layer (5) and/or greater elasticity than the carrier substrate (2). In addition, the security element (1) can be attached to a surface (7) of an object (8) by means of the self-adhesive layer (3).

Description

The invention relates to a security element, in particular a security label or a security adhesive tape, with tamper evidence.

Generic security elements, which are often referred to as void labels, are used to indicate attempts to manipulate objects and packaging. In particular, it is possible by means of void labels to ensure relatively inexpensive protection against counterfeiting, or to attach proof of authenticity or proof of quality in a simple manner. As soon as the void label is detached from the background, a security feature that was invisible before or when affixed appears on the surface of the label. These are mostly lettering, images, patterns and the like. Especially with high-quality packaging and products in the consumer goods sector, it is required that the void labels can be removed without leaving any residue, so that the surface remains visually appealing and there is no overall reduction in quality.

The main challenge and problem here is the development of special adhesives or the setting of a sufficiently high adhesive strength. If the adhesive strength of the security label is too low, the label may come off unintentionally or even on its own. The requirement for generic security labels is therefore a strong adhesive force, while still ensuring that the labels can be detached without leaving any residue. Above all, it is difficult to use a single, universally applicable adhesive to satisfactorily meet these requirements on different surfaces in the same way.

In order to ensure residue-free detachability, weakly adhering adhesives are usually used. In this case, it is necessary to precisely set or coordinate the adhesive effect on a specific substrate or a specific surface. This has the disadvantage that such special adhesives cannot be used universally for all areas of application of void labels.

The object of the present invention was to overcome the disadvantages of the prior art and to provide a security element, in particular a security label or a security adhesive tape, with proof of tampering, which has an adhesive strength that is largely independent of a substrate and is sufficiently high, and which also can be removed from a variety of surfaces without leaving any residue.

This object is achieved by the security element with tamper evidence according to the claims.

The security element according to the invention, which can in particular be a security label or a security adhesive tape, is equipped with a tamper evidence. It comprises a carrier substrate and a self-adhesive layer arranged on the carrier substrate. According to the invention, a partial separating layer is formed on the side of the carrier substrate facing the self-adhesive layer, and a deformable layer is formed between the carrier substrate and the self-adhesive layer and between the partial separating layer and the self-adhesive layer, the deformable layer being one layer compared to the partial separating layer and/or has greater elasticity than the carrier substrate, and wherein the security element can be attached to a surface of an object by means of the self-adhesive layer.

The deformable layer according to the invention prevents the "VOID writing" from breaking through and the label can be removed from the surface without leaving any residue. In particular, the deformable layer can be a highly elastic, rubber-like and stretchable layer. Instead of setting the adhesive to be weakly adhesive and having to match it to a specific substrate or a specific surface, the arrangement according to the invention makes it possible to use the product with standard, universally applicable self-adhesives known to those skilled in the art. The embodiment of a security element according to the invention is also particularly advantageous because, due to the deformable layer, residue-free removability is possible and the security element nevertheless allows reliable evidence that manipulation has taken place.

At this point it should be pointed out that the term layer in the context of the invention can describe both an individual layer and a composite or a layering of several layers. This can involve, for example, several layers or plies of the same type, but also several different types.

Furthermore, it can be expedient if an adhesion effect between the partial separation layer and the carrier substrate is different from an adhesion effect between the carrier substrate and the areas not covered by the partial separation layer on the side of the carrier substrate facing the self-adhesive layer and where this differs when the security element is removed the carrier substrate is detached from the surface of the object on its side facing the self-adhesive layer, preferably detached from the partial separating layer.

Advantageously, it is expedient if the adhesive effect between the partial separating layer and the carrier substrate is lower than the adhesive effect between the carrier substrate and the areas not covered by the partial separating layer on the side of the carrier substrate facing the self-adhesive layer. However, it is also possible that an adhesion between the partial release layer and the carrier substrate is higher than an adhesion between the carrier substrate and the areas not covered by the partial release layer on the side of the carrier substrate facing the self-adhesive layer. In this form, the partial separating layer can thus act as a kind of adhesive layer.

Due to this different adhesive effect, a manipulation that has taken place can be detected. In particular, it may be the case that a user sticks the security element on again after removing it from the surface of the object. Due to the different adhesive effect, however, such previous manipulation can be detectable. The deformable layer can both enable the security element to be detached without leaving any residue and also cause the manipulation effect or the proof of manipulation to be triggered.

Furthermore, it can be provided that the partial separating layer is designed as a letter, number, character, symbol or part of an image or pattern.

In this way, different designs can be realized and the respective logos and brands of a manufacturer can also be attached. A user is thus given a variety of design options. The term partial separating layer includes both connected areas and areas that are separate from one another, with the areas preferably being connected and extending at least in sections to the edge of the security element. In particular, when the security element is viewed from above and after the security element has been detached from an object for the first time, it can be seen when the partial release liner is applied as a letter, number, character, symbol, or part of an image or design.

In addition, it can be provided that the partial separating layer is only visible after the security element has been removed from the surface.

If the partial separating layer, or the shapes formed by the partial separating layer, only become visible after the security element has been removed from the surface, this can be advantageous in order to reliably detect manipulation or make it recognizable. For example, the authenticity of the respective product or object can also be easily proven or verified by a user. It can also be expedient if a user, in particular an end user, cannot see at first glance that the label or adhesive tape is a security element. Visually, the security element can give the impression of a conventional sticker. Only when the label is removed or peeled off from a product or label do the cutouts become visible and the end user recognizes, for example, a company logo, a serial number or the like. This effect is advantageously not reversible, so that a manipulation that has taken place also remains recognizable for subsequent users or viewers.

Also advantageous is an embodiment according to which it can be provided that an air gap is formed between the carrier substrate and the partial separating layer when the security element is removed from the surface.

An air gap that forms when it is pulled off can be advantageous in order to make manipulation that has taken place recognizable. In the areas of the formed air gap, an optical effect can occur, or the partial separating layer can become visible. In particular, the air gap can occur in the areas in which the adhesive effect is lower, as described above. The formation of an air gap can be promoted or even made possible in particular by the provision of the deformable layer.

Advantageously, the partial separating layer can be arranged or printed on the carrier substrate in such a way that it forms an at least largely coherent network or interconnected channels when the security element is viewed from above, ie viewed from the carrier substrate side. It can also be useful if this network or these channels extend at least in sections to the outer edge of the security element. For example, such a network can also be rhombus-shaped. When the security element is detached, air from the environment can penetrate via the channel-like partial separating layer that reaches up to the edge of the label.

According to a development, it is possible for the security element to be removable from the surface of the object completely and/or in one piece.

It can be important to completely remove the sticker from the surface without leaving any residue, so that there is no loss of quality or aesthetics of any kind on the product, packaging or any surface. If the security element can be removed in one piece, this can also make it easier for a layperson to prove that a manipulation has taken place.

Furthermore, it can be expedient if the partial separating layer is formed by a separating varnish. Poorly adhering coating compositions that are widely known to those skilled in the art are preferably used as the release coating. These include, for example, release coatings based on cycloolefin copolymers, nitrocellulose, acrylates, polyvinyl chloride, ethylene acrylate copolymers or styrene acrylates in a suitable solvent. Chlorinated polyolefins can preferably be added to adjust the adhesion or release effect, and the proportion of chlorinated polyolefins in the composition can be from 0 to 130% by weight in relation to the base polymer. Alternatively, any paint systems can also be used whose adhesion can be reduced by an additive, for example by a polyacrylate copolymer. Furthermore, very thinly applied layers of polyamide, polyethylene, fluoropolymer wax or silicone coatings can also be used. If necessary, the release lacquer layer can also be provided with security pigments such as fluorescent pigments and the like.

The adhesive effect of the partial separating layer or the separating varnish is adjusted in such a way that when the security element is detached from an object, the separating layer detaches from the carrier substrate, but the structure of the remaining security element structure at these points is retained. The partial separating layer or the separating lacquer is advantageously a layer applied by means of a printing process. Printing processes such as gravure, flexo, offset, screen or digital printing are used here.

In addition, it can be provided that there is an adhesive effect between the self-adhesive layer and the deformable layer.

A certain adhesive effect can be advantageous so that the individual layers do not become detached. However, the adhesive effect should not be too great, so that the elastic properties of the deformable layer are not adversely affected.

Provision can furthermore be made for the deformable layer to stretch elastically, preferably rubber-elastically, in a detachment direction when the security element is removed from the surface, with the stretching promoting the detachment of the carrier substrate from the partial separating layer.

According to a particular embodiment, it is possible for the deformable layer to be a layer comprising rubber and/or polyethylene and/or metals. In particular, it can be advantageous if the deformable layer is a deformable, tear-resistant and non-brittle substrate. For example, metal foils such as aluminum foils or copper foils or also plastic substrates made of PET or PE can be advantageous here.

According to an advantageous development, it can be provided that the deformable layer has a tensile strength of between 5 and 140 MPa, in particular between 10 and 130 MPa and in particular between 15 and 120 MPa. Above all when the deformable layer is a metal foil, it can be expedient if the foil or the substrate has an elongation at break of 0.5 to 15%, particularly 1 to 10% and in particular 1 to 8% .

In particular, it can be advantageous if the deformable layer has a thickness of between 1 μm and 300 μm, preferably 3 μm and 150 μm, particularly preferably 3 μm and 100 μm, in particular 5 μm and 80 μm. In particular when the deformable layer is a metal foil or a plastic substrate, it can be advantageous if its thickness is between 2 μm and 100 μm, preferably between 5 μm and 90 μm, in particular between 10 μm and 50 μm. In particular, if the deformable layer is a plastic substrate, a tensile stress at 10% elongation in the longitudinal direction can be between 2 and 50 MPa, preferably between 4 and 30 MPa, particularly preferably between 7 and 20 MPa and at 10% elongation in the transverse direction between 3 and 50 MPa, preferably between 5 and 30 MPa, particularly preferably between 8 and 21 MPa.

According to an advantageous development, it can be provided that a laminating layer is formed on the side of the deformable layer that faces the carrier substrate. This can be useful in particular when the carrier substrate is a deformable, tear-resistant and non-brittle substrate, as is the case, for example, with metal foils and especially with aluminum foils and copper foils and also with plastic-based substrates made of PET or PE. In this case, a deformable layer can be laminated onto the partial separating layer or onto the carrier substrate by means of a laminating layer, that is to say can be laminated on by the application of pressure and temperature.

In particular, it can be expedient if a layer is formed between the partial separating layer and the deformable layer and between the carrier substrate and the deformable layer.

Furthermore, it can be provided that the layer is designed as a color layer, in particular as a printed color layer. Advantageously, the color layer can also be partially and/or multicolored.

This enables a variety of design and configuration options using standard manufacturing methods. In particular, colored layers can be produced comparatively easily and inexpensively. Of course, it is also conceivable and possibly expedient for the layer to be transparent. Coatings made from pigmented paints or lacquers are particularly suitable as the opaque color layer. Pigments made of TiO ₂ and/or ZnS and/or BaSO ₄ and/or Al ₂ O ₃ and/or silicic acid derivatives and/or kaolin and/or talc and/or feldspar are conceivable as pigments, but also the use of all known colored fluorescent ones Pigments or optically active pigments such as interference pigments are conceivable. However, the printing ink can also have metallic pigments or magnetic pigments, as a result of which another security feature is created and security against forgery can be additionally improved. The printing ink preferably contains a pigment content of 5 to 40% by weight. The layer may be applied by any convenient method such as gravure printing, flexographic printing, screen printing, digital printing and the like.

In addition, it can be provided that the layer is designed as a metallized layer, which is a metallic material, in particular selected from the group consisting of silver, copper, aluminum, gold, platinum, niobium, tin, or nickel, titanium, vanadium, chromium, cobalt and palladium or alloys of these materials, in particular cobalt-nickel alloys or at least one low-index dielectric material with a refractive index less than or equal to 1.65, in particular selected from the group of aluminum oxide (Al ₂ O ₃ ), metal fluorides, for example magnesium fluoride (MgF ₂ ) , aluminum fluoride (AlF ₃ ), silicon oxide (SIO _x ), silicon dioxide (SiO ₂ ), cerium fluoride (CeF ₃ ), sodium aluminum fluoride (e.g. Na ₃ AlF ₆ or Na ₅ Al ₃ F ₁₄ ), neodymium fluoride (NdF ₃ ) , lanthanum fluoride (LaF ₃ ), samarium fluoride (SmF ₃ ), barium fluoride (BaF ₂ ), calcium fluoride (CaF ₂ ), lithium fluoride (LiF), low-index organic monomers and/or low-index organic polymers or at least one n high-index dielectric material with a refractive index greater than 1.65, selected in particular from the group zinc sulfide (ZnS), zinc oxide (ZnO), titanium dioxide (TiO ₂ ), carbon (C), indium oxide (In ₂ O ₃ ), indium Tin oxide (ITO), tantalum pentoxide (Ta ₂ O ₅ ), cerium oxide (CeO ₂ ), yttrium oxide (Y ₂ O ₃ ), europium oxide (Eu ₂ O ₃ ), iron oxides such as iron(II,III) oxide (Fe ₃ O ₄ ) and ferric oxide (Fe ₂ O ₃ ), hafnium nitride (HfN), hafnium carbide (HfC), hafnium oxide (HfO ₂ ), lanthanum oxide (La ₂ O ₃ ), magnesium oxide (MgO), neodymium oxide (Nd ₂ O ₃ ), praseodymium oxide (Pr ₆ O ₁₁ ), samarium oxide (Sm ₂ O ₃ ), antimony trioxide (Sb ₂ O ₃ ), silicon carbide (SiC), silicon nitride (Si ₃ N ₄ ), silicon monoxide (SiO), selenium trioxide (Se ₂ O ₃ ), tin oxide (SnO ₂ ), tungsten trioxide (WO ₃ ), high-index organic monomers and/or high-index organic polymers or is made from at least one of these materials.

Also advantageous is an embodiment according to which it can be provided that the carrier substrate is formed by a cover film, preferably by a transparent cover film.

Cover foils can be made robust and scratch-resistant and also glossy and thus contribute to a high-quality appearance of the security element, in particular a label, in a visually appealing manner. The carrier substrate can expediently be a deformable, tear-resistant and non-brittle substrate.

According to a further development, it is possible for the carrier substrate to be made of plastic, in particular of a light-transmitting and/or thermoplastic plastic the carrier substrate preferably at least one of the materials from the group polyimide (PI), polypropylene (PP), monoaxially oriented polypropylene (MOPP), biaxially oriented polypropylene (BOPP), polyethylene (PE), polyphenylene sulfide (PPS), polyether ether ketone, (PEEK) polyether ketone ( PEK), polyethyleneimide (PEI), polysulfone (PSU), polyaryletherketone (PAEK), polyethylene naphthalate (PEN), liquid crystalline polymers (LCP), polyester, polybutylene terephthalate (PBT), polyethylene terephthalate (PET), polyamide (PA), polycarbonate (PC) , cycloolefin copolymers (COC), polyoxymethylene (POM), acrylonitrile butadiene styrene (ABS), polyvinyl chloride (PVC) ethylene tetrafluoroethylene (ETFE), polytetrafluoroethylene (PTFE), polyvinyl fluoride (PVF), polyvinylidene fluoride (PVDF) and ethylene tetrafluoroethylene hexafluoropropylene Fluoroterpolymer (EFEP) and / or mixtures and / or copolymers of these materials comprises or is made of at least one of these materials.

It can also be useful if the self-adhesive layer is a layer comprising an adhesive or an adhesive mixture, in particular a dispersion adhesive, a hot-melt adhesive, a rubber adhesive, and/or an acrylate adhesive, by means of which a preferred residue-free detachable adhesive connection of the security element to the surface of an object can be produced.

In addition, it can be provided that the security element has a thickness of between 20 μm and 400 μm, preferably 40 μm and 300 μm, particularly preferably 50 μm and 250 μm, in particular 60 μm and 200 μm.

Furthermore, it can be provided that the self-adhesive layer is delimited by a detachable protective layer, in particular by a protective film that can be removed without leaving any residue. Such protective films are also known to experts under the term “release liner”.

Such a protective film can protect the self-adhesive layer before it is applied to a surface of an object, so that no dust, dirt, air, moisture or the like reduces the adhesive effect of the self-adhesive layer before it is used. By removing the protective film from the self-adhesive layer, a user can apply the security element to the desired product or packaging surface.

According to a particular embodiment, it is possible for the security element to have additional layers, which additional layers include in particular protective lacquers, heat-sealing lacquers, adhesives, primers and/or foils.

The advantages and effects of such layers and their ideal positioning in the security element are widely known to those skilled in the art and are therefore not explained in more detail at this point.

For a better understanding of the invention, it is explained in more detail with reference to the following figures.

Fig. 1

einen Schnitt durch ein erstes Ausführungsbeispiel eines Sicherheitselements,

Fig. 2

einen Schnitt durch ein weiteres Ausführungsbeispiel eines Sicherheitselements mit einer Kaschierschicht,

Fig. 3

einen Schnitt durch ein weiteres Ausführungsbeispiel eines Sicherheitselements mit einer Farbschicht,

Fig. 4

einen Schnitt durch ein weiteres Ausführungsbeispiel eines Sicherheitselements mit einer Farbschicht und einer Kaschierschicht,

Fig. 5

einen Schnitt durch das Ausführungsbeispiel eines Sicherheitselements aus Fig. 3 auf einer Oberfläche,

Fig. 6

einen Schnitt durch das Ausführungsbeispiel eines Sicherheitselements aus Fig. 3 während dem Entfernen von einer Oberfläche,

Fig. 7

einen Schnitt durch das Ausführungsbeispiel eines von einer Oberfläche entfernten Sicherheitselements aus Fig. 3,

Fig. 8

einen Schnitt durch ein weiteres Ausführungsbeispiel eines Sicherheitselements vor und während dem Ablösen einer Schutzschicht,

Fig. 9

ein weiteres Ausführungsbeispiel eines Sicherheitselements während dem Entfernen von einer Oberfläche eines Gegenstandes in dreidimensionaler Ansicht.

They each show in a greatly simplified, schematic representation:

1

a section through a first embodiment of a security element,

2

a section through another embodiment of a security element with a lamination layer,

3

a section through another embodiment of a security element with a color layer,

4

a section through another embodiment of a security element with a color layer and a laminating layer,

figure 5

a section through the embodiment of a security element 3 on a surface

6

a section through the embodiment of a security element 3 while removing from a surface,

7

1 shows a section through the exemplary embodiment of a security element removed from a surface 3 ,

8

a section through another embodiment of a security element before and during the detachment of a protective layer,

9

another embodiment of a security element during removal from a surface of an object in a three-dimensional view.

As an introduction, it should be noted that in the differently described embodiments, the same parts are provided with the same reference numbers or the same component designations, the disclosures contained throughout the description can be applied to the same parts with the same reference numbers or the same component designations. The position information selected in the description, such as top, bottom, side, etc., is related to the directly described and illustrated figure and these position information are to be transferred to the new position in the event of a change in position.

the Figures 1 to 9 are summarized below to avoid unnecessary repetition. In principle, however, each of the exemplary embodiments illustrated in the figures can be designed independently. the Figures 1 to 8 each show a section through conceivable exemplary embodiments of a security element 1. Of course, the exemplary embodiments shown are only to be understood as examples and, of course, a large number of other, possibly expedient, designs are also conceivable.

According to the invention, the illustrated security elements 1 with tamper evidence comprise a carrier substrate 2 and a self-adhesive layer 3 arranged on the carrier substrate 2. It is provided that a partial separating layer 5 is formed on the side 4 of the carrier substrate 2 facing the self-adhesive layer 3 and that between the carrier substrate 2 and the self-adhesive layer 3 and between the partial separating layer 5 and the self-adhesive layer 3 a deformable layer 6 is formed. In this case, the deformable layer 6 has greater elasticity in comparison to the partial separating layer 5 and/or in comparison to the carrier substrate 2 . This structure according to the invention is particularly characterized by the figure 1 shown. The security element 1 can also be attached to a surface 7 of an object 8 by means of the self-adhesive layer 3 . The security elements 1 shown can be designed in particular as a security label or security adhesive tape.

An adhesive effect between the partial separating layer 5 and the carrier substrate 2 can be different from an adhesive effect between the carrier substrate 2 and the areas not covered by the partial separating layer 5 on the side 4 of the carrier substrate 2 facing the self-adhesive layer 3 . When the security element 1 is removed from the surface 7 of the object 8 , the carrier substrate 2 can become detached on its side 4 facing the self-adhesive layer 3 . The carrier substrate 2 can preferably be attached to its self-adhesive layer 3 facing side 4 of the partial separating layer 5 solve. The security element 1 can - as for example in the figures 5 , 6 and 9 shown - can be attached to a surface 7 of an object 8 by means of the self-adhesive layer 3 . When the security element 1 is removed from the surface 7 , the carrier substrate 2 can become detached from the partial separating layer 5 . The removal or peeling off of the security element 1 from the surface 7 is particularly in the figures 6 and 9 shown.

The partial separating layer 5 can be in the form of a letter, number, character, symbol or part of an image or pattern, these representations being recognizable to an observer in particular in a plan view of the security element 1 . It can be expedient if the partial separating layer 5 is only visible after the security element 1 has been removed from the surface 7 . Such a detachment of the security element 1 from an object 8 is in particular by the figures 6 and 9 shown. the figure 9 1 shows the removal of a security element 1 from a surface 7 of an object 8 in a three-dimensional view. In that area of the security element 1 which has already been detached from the surface 7, the partial separating layer 5 arranged as a symmetrical checkered pattern is visible. The partial separating layer 5 can be formed in the contiguous areas of the grid 19 forming the checkered pattern. Where the security element 1 still sticks to the surface 7, the partial separating layer 5 cannot be recognized or can only be recognized with difficulty. This is indicated by thin dashed lines. By means of dashed lines are in the figure 9 also marked those areas from which the security element 1 was detached without leaving any residue.

Advantageously, the partial separation layer 5 as in the figure 9 outlined is arranged or printed on the carrier substrate 2 in such a way that it forms an at least largely coherent grid 19 or network or channels connected to one another when the security element is viewed from above. It may be the case that this grid 19 or net or these channels reach at least in sections up to the edge 18 of the security element 1 . When the security element 1 is detached from the object 8 , air from the environment can penetrate through the channel-like partial separating layer 5 that reaches up to the edge 18 of the label.

When removing the security element 1 from the surface 7, as by the figures 5 , 6 and 7 Step by step is shown schematically, can between the carrier substrate 2 and form an air gap 9 of the partial separating layer 5 . This resulting air gap 9 is also in the figure 7 recognizable since the figure 7 precisely this state of the security element 1 after removal from the surface 7.

In particular, it can be advantageous if the security element 1 can be removed completely and/or in one piece from the surface 7 of the object 8 . In this way, a user can conveniently remove or detach the label or the adhesive strip as a whole without having to laboriously remove individual sections. The user can then view the detached label or the adhesive strip in its entirety and evaluate the manipulation that has taken place or the authenticity of the quality seal.

It can be advantageous if the partial separating layer 5 is formed by a separating varnish. Furthermore, there can be an adhesive effect between the self-adhesive layer 3 and the deformable layer 6 .

When the security element 1 is removed from the surface 7 , the deformable layer 6 can stretch elastically in a detachment direction 10 , preferably elastically, with the stretching promoting the detachment of the carrier substrate 2 from the partial separating layer 5 . The detachment process, which is carried out by a user, is particularly in the figures 6 and 9 sketched. The detachment shown can take place in a detachment direction 10 which, seen in relation to the surface 7, runs along an acute angle 17, or also along a flat angle 17. Since the security element 1 is preferably a flexible and thin label or an adhesive tape, this is flexible in shape and therefore basically easy to remove. The direction of detachment 10, or the associated angle 17, can of course change during the detachment process.

The deformable layer 6 can be a layer comprising rubber and/or polyethylene and/or metals. The deformable layer 6 can have a tensile strength of between 5 and 140 MPa, in particular between 10 and 130 MPa and in particular between 15 and 120 MPa. Especially when it is in the deformable layer 6 is a metal foil or a plastic substrate, it may be useful if the film or the substrate has an elongation at break of from 0.5 to 15%, in particular from 1 to 10% and in particular from 1 to 8%.

A thickness 11 of the deformable layer 6 can be between 1 μm and 300 μm, preferably between 3 μm and 150 μm, particularly preferably between 3 μm and 100 μm, in particular between 5 μm and 80 μm. In particular when the deformable layer 6 is a metal foil or a plastic substrate, it can be advantageous if its thickness 11 is between 2 μm and 100 μm, preferably between 5 μm and 90 μm, in particular between 10 μm and 50 μm.

A laminating layer 13 can be formed on the side 12 of the deformable layer 6 facing the carrier substrate 2 . the figures 2 and 4 show examples of embodiments with such a laminating layer 13. In particular, when the deformable layer 6 is a metal foil, such as an aluminum foil or a copper foil, or a plastic foil, the provision of a laminating layer 13 can be expedient. In this way, lamination by means of pressure and temperature can be facilitated.

It is also possible for a layer 14 to be formed between the partial separating layer 5 and the deformable layer 6 and between the carrier substrate 2 and the deformable layer 6 . This advantageous development is through the Figures 3 to 8 shown as an example. For example, this layer 14 can be designed so that it makes direct contact with the deformable layer 6, or can also make contact with a possibly provided laminating layer 13. It can be advantageous if the layer 14 is in the form of an ink layer, in particular if the layer 14 is in the form of a printed ink layer. The color layer can be partially and/or multicolored.

Alternatively or additionally, it is also conceivable if the layer 14 is designed as a metallized layer, which is a metallic material, in particular selected from the group consisting of silver, copper, aluminum, gold, platinum, niobium, tin, or nickel, titanium, vanadium, Chromium, cobalt and palladium or alloys of these materials, in particular cobalt-nickel alloys, or at least one low-index dielectric material with a refractive index of less than or equal to 1.65, in particular selected from the group consisting of aluminum oxide (Al ₂ O ₃ ), metal fluorides, for example magnesium fluoride (MgF ₂ ), aluminum fluoride (AlF ₃ ), silicon oxide (SIO _x ), Silicon dioxide (SiO ₂ ), cerium fluoride (CeF ₃ ), sodium aluminum fluoride (e.g. Na ₃ AlF ₆ or Na ₅ Al ₃ F ₁₄ ), neodymium fluoride (NdF ₃ ), lanthanum fluoride (LaF ₃ ), samarium fluoride (SmF ₃ ) barium fluoride (BaF ₂ ), calcium fluoride (CaF ₂ ), lithium fluoride (LiF), low-index organic monomers and/or low-index organic polymers, or at least one high-index dielectric material with a refractive index greater than 1.65, in particular selected from the group of zinc sulfide (ZnS ), zinc oxide (ZnO), titanium dioxide (TiO ₂ ), carbon (C), indium oxide (In ₂ O ₃ ), indium tin oxide (ITO), tantalum pentoxide (Ta ₂ O ₅ ), cerium oxide (CeO ₂ ), yttrium oxide (Y ₂ O ₃ ), europium oxide (Eu ₂ O ₃ ), iron oxides such as Example iron(II,III) oxide (Fe ₃ O ₄ ) and iron(III) oxide (Fe ₂ O ₃ ), hafnium nitride (HfN), hafnium carbide (HfC), hafnium oxide (HfO ₂ ), lanthanum oxide (La ₂ O ₃ ) , magnesium oxide (MgO), neodymium oxide (Nd ₂ O ₃ ), praseodymium oxide (Pr ₆ O ₁₁ ), samarium oxide (Sm ₂ O ₃ ), antimony trioxide (Sb ₂ O ₃ ), silicon carbide (SiC), silicon nitride (Si ₃ N ₄ ) , Silicon monoxide (SiO), selenium trioxide (Se ₂ O ₃ ), tin oxide (SnO ₂ ), tungsten trioxide (WO ₃ ), high-index organic monomers and/or high-index organic polymers, or is made from at least one of these materials.

The carrier substrate 2 can be formed by a cover film, with the carrier substrate 2 preferably being formed by a transparent cover film. In this way, an observer can easily recognize whether the security element 1 has been manipulated or not.

The carrier substrate 2 can advantageously be made of plastic, in particular of a translucent and/or thermoplastic material, with the carrier substrate 2 preferably being at least one of the materials from the group consisting of polyimide (PI), polypropylene (PP), monoaxially oriented polypropylene (MOPP), biaxial oriented polypropylene (BOPP), polyethylene (PE), polyphenylene sulfide (PPS), polyetheretherketone, (PEEK) polyetherketone (PEK), polyethyleneimide (PEI), polysulfone (PSU), polyaryletherketone (PAEK), polyethylene naphthalate (PEN), liquid crystalline polymers (LCP ), polyester, polybutylene terephthalate (PBT), polyethylene terephthalate (PET), polyamide (PA), polycarbonate (PC), cycloolefin copolymers (COC), polyoxymethylene (POM), acrylonitrile butadiene styrene (ABS), polyvinyl chloride (PVC) ethylene tetrafluoroethylene (ETFE ), polytetrafluoroethylene (PTFE), polyvinyl fluoride (PVF), polyvinylidene fluoride (PVDF) and ethylene tetrafluoroethylene hexafluoropropylene fluoroterpolymer (EFEP) and/or mixtures and/or copolymers of these materials or be made from at least one of these materials.

The self-adhesive layer 3 can expediently be formed as a layer comprising an adhesive or an adhesive mixture, in particular a dispersion adhesive, a hot-melt adhesive, a rubber adhesive and/or an acrylate adhesive. In particular, it can be advantageous if a universally usable adhesive is used.

The security element 1 is advantageously relatively thin so that it does not stand out unnecessarily from the surface 7 of the object 8 . The security element 1 preferably has a thickness 15 between 20 μm and 400 μm, preferably between 40 μm and 300 μm, particularly preferably between 50 μm and 250 μm, in particular between 60 μm and 200 μm.

In particular, it can be useful if the self-adhesive layer 3 according to figure 8 is delimited by a detachable protective layer 16, in particular by a protective film that can be removed without leaving any residue. Figure 8a 1 shows a security element 1, for example an adhesive label or an adhesive strip, in its state before it is stuck on or attached to a surface 7. To protect the self-adhesive layer 3, it is covered by a protective layer 16. Those skilled in the art are also familiar with such protective layers 16 under the term “release liner”. In the Figure 8b is shown how this protective layer 16 of the self-adhesive layer 3 by a - is pulled or replaced user - not shown. After the protective layer 16 has been completely detached, the self-adhesive layer 3, which is now exposed, can be attached to an object 8, as exemplified by FIG figures 5 , 6 and 9 is shown.

In addition, the security element 1 can also have further layers, which additional layers include in particular protective lacquers, heat-sealing lacquers, adhesives, primers and/or foils. Depending on the application and requirements, the person skilled in the art is able to make the required or suitable adjustments. For example, it can also be expedient for a cover or printed layer—not shown in the figure—to be arranged on the side of the carrier substrate 2 facing away from the self-adhesive layer 3 . Such a The layer can also serve to protect the security element 1 and determine or influence its appearance or the design recognizable to an observer. A cover or print layer can be partially applied, for example. In addition, a cover or print layer can also be colored, in particular also be multicolored.

The exemplary embodiments show possible variants, whereby it should be noted at this point that the invention is not limited to the specifically illustrated variants of the same, but rather that various combinations of the individual variants with one another are also possible and this possibility of variation is based on the teaching on technical action through the present invention in skills of the specialist working in this technical field.

The scope of protection is determined by the claims. However, the description and drawings should be used to interpret the claims. Individual features or combinations of features from the different exemplary embodiments shown and described can represent independent inventive solutions. The task on which the independent inventive solutions are based can be found in the description.

All information on value ranges in the present description should be understood to include any and all sub-ranges, e.g. the information 1 to 10 should be understood to mean that all sub-ranges, starting from the lower limit 1 and the upper limit 10, are also included , ie all subranges start with a lower limit of 1 or greater and end with an upper limit of 10 or less, e.g. 1 to 1.7, or 3.2 to 8.1, or 5.5 to 10.

Finally, for the sake of clarity, it should be pointed out that some elements are shown not to scale and/or enlarged and/or reduced in size for a better understanding of the structure.

list of reference numbers

1

security element

2

carrier substrate

3

self-adhesive layer

4

side

5

partial separation layer

6

deformable layer

7

surface

8th

subject

9

air gap

10

detachment direction

11

thickness

12

side

13

laminating layer

14

layer

15

thickness

16

protective layer

17

angle

18

edge

19

grid

Claims (23)

A security element (1), in particular a security label or adhesive security tape, with tamper evidence, comprising a carrier substrate (2) and a self-adhesive layer (3) arranged on the carrier substrate (2), characterized in that on the side (4) of the carrier substrate facing the self-adhesive layer (3). (2) a partial separating layer (5) is formed and that a deformable layer (6) is formed between the carrier substrate (2) and the self-adhesive layer (3) and between the partial separating layer (5) and the self-adhesive layer (3), the deformable layer (6) has greater elasticity than the partial separating layer (5) and/or greater elasticity than the carrier substrate (2), and wherein the security element (1) is attached to a surface (7) of an object by means of the self-adhesive layer (3). (8) is attachable. The security element according to claim 1, characterized in that an adhesive effect between the partial separating layer (5) and the carrier substrate (2) depends on an adhesive effect between the carrier substrate (2) and the areas not covered by the partial separating layer (5) on the self-adhesive layer ( 3) facing side (4) of the carrier substrate (2) is different and when removing the security element (1) from the surface (7) of the object (8), the carrier substrate (2) on its side facing the self-adhesive layer (3). (4) dissolves, preferably from the partial separating layer (5). Security element (1) according to Claim 1 or 2, characterized in that the partial separating layer (5) is in the form of a letter, number, character, symbol or part of an image or pattern. Security element (1) according to one of Claims 2 or 3, characterized in that the partial separating layer (5) is only visible after the security element (1) has been removed from the surface (7). Security element (1) according to one of Claims 2 to 4, characterized in that an air gap (9) forms between the carrier substrate (2) and the partial separating layer (5) when the security element (1) is removed from the surface (7). Security element (1) according to one of Claims 2 to 5, characterized in that the security element (1) can be removed completely and/or in one piece from the surface (7) of the object (8). Security element (1) according to one of the preceding claims, characterized in that the partial separating layer (5) is formed by a separating lacquer. Security element (1) according to one of the preceding claims, characterized in that there is an adhesive effect between the self-adhesive layer (3) and the deformable layer (6). Security element (1) according to one of the preceding claims, characterized in that the deformable layer (6) when removing the security element (1) from the surface (7) stretches elastically in a detachment direction (10), preferably rubber-elastically stretches, the stretching detachment of the carrier substrate (2) from the partial separating layer (5). Security element (1) according to one of the preceding claims, characterized in that the deformable layer (6) is a layer comprising rubber and/or polyethylene and/or metals. Security element (1) according to one of the preceding claims, characterized in that the deformable layer (6) has a tensile strength of between 5 and 140 MPa, in particular between 10 and 130 MPa and in particular between 15 and 120 MPa. Security element (1) according to one of the preceding claims, characterized in that the deformable layer (6) has a thickness (11) between 1 µm and 300 µm, preferably 3 µm and 150 µm, particularly preferably 3 µm and 100 µm, in particular 5 µm and 80 µm. The security element (1) according to one of the preceding claims, characterized in that a lamination layer (13) is formed on the side (12) of the deformable layer (6) facing the carrier substrate (2). Security element (1) according to one of the preceding claims, characterized in that a layer (14) is formed between the partial separating layer (5) and the deformable layer (6) and between the carrier substrate (2) and the deformable layer (6). The security element (1) according to Claim 14, characterized in that the layer (14) is designed as an ink layer, in particular as a printed ink layer. The security element (1) according to claim 15, characterized in that the color layer is partially and/or multicolored. Security element (1) according to one of Claims 14 to 16, characterized in that the layer (14) is designed as a metallized layer which is a metallic material, in particular selected from the group consisting of silver, copper, aluminium, gold, platinum, niobium and tin , or of nickel, titanium, vanadium, chromium, cobalt and palladium or alloys of these materials, in particular cobalt-nickel alloys, or at least one low-index dielectric material with a refractive index of less than or equal to 1.65, in particular selected from the group of aluminum oxide (Al ₂ O ₃ ), metal fluorides, for example magnesium fluoride (MgF ₂ ), aluminum fluoride (AlF ₃ ), silicon oxide (SIO _x ), silicon dioxide (SiO ₂ ), cerium fluoride (CeF ₃ ), sodium aluminum fluoride (e.g. Na ₃ AlF ₆ or Na ₅ Al ₃ F ₁₄ ), neodymium fluoride (NdF ₃ ), lanthanum fluoride (LaF ₃ ), samarium fluoride (SmF ₃ ), barium fluoride (BaF ₂ ), calcium fluoride (CaF ₂ ), lithium fluoride (LiF), low refractive index organic monomers and/or n High-index organic polymers, or at least one high-index dielectric material with a refractive index greater than 1.65, in particular selected from the group consisting of zinc sulfide (ZnS), zinc oxide (ZnO), titanium dioxide (TiO ₂ ), carbon (C), indium oxide (In ₂ O ₃ ), indium tin oxide (ITO), tantalum pentoxide (Ta ₂ O ₅ ), cerium oxide (CeO ₂ ), yttrium oxide (Y ₂ O ₃ ), europium oxide (Eu ₂ O ₃ ), iron oxides such as iron(II ,III) oxide (Fe ₃ O ₄ ) and ferric oxide (Fe ₂ O ₃ ), hafnium nitride (HfN), hafnium carbide (HfC), hafnium oxide (HfO ₂ ), lanthanum oxide (La ₂ O ₃ ), magnesium oxide (MgO), neodymium oxide ( Nd ₂ O ₃ ), praseodymium oxide (Pr ₆ O ₁₁ ), samarium oxide (Sm ₂ O ₃ ), antimony trioxide (Sb ₂ O ₃ ), silicon carbide (SiC), silicon nitride (Si ₃ N ₄ ), silicon monoxide (SiO), selenium trioxide ( Se ₂ O ₃ ), tin oxide (SnO ₂ ), tungsten trioxide (WO ₃ ), high-index organic monomers and/or high-index organic polymers or is made from at least one of these materials. Security element (1) according to one of the preceding claims, characterized in that the carrier substrate (2) is formed by a cover film, preferably by a transparent cover film. The security element (1) according to any one of the preceding claims, characterized in that the carrier substrate (2) is made of plastic, in particular a translucent and/or thermoplastic material, the carrier substrate (2) preferably containing at least one of the materials from the polyimide group (PI), polypropylene (PP), monoaxially oriented polypropylene (MOPP), biaxially oriented polypropylene (BOPP), polyethylene (PE), polyphenylene sulfide (PPS), polyetheretherketone, (PEEK) polyetherketone (PEK), polyethyleneimide (PEI), polysulfone (PSU ), polyaryletherketone (PAEK), polyethylene naphthalate (PEN), liquid crystalline polymers (LCP), polyester, polybutylene terephthalate (PBT), polyethylene terephthalate (PET), polyamide (PA), polycarbonate (PC), cycloolefin copolymers (COC), polyoxymethylene (POM), Acrylonitrile butadiene styrene (ABS), polyvinyl chloride (PVC), ethylene tetrafluoroethylene (ETFE), polytetrafluoroethylene (PTFE), polyvinyl fluoride (PVF), polyvinylidene fluoride (PVDF) and ethylene n-Tetrafluoroethylene-hexafluoropropylene fluoroterpolymer (EFEP) and/or mixtures and/or copolymers of these materials or is made from at least one of these materials. The security element (1) according to any one of the preceding claims, characterized in that the self-adhesive layer (3) is a layer comprising an adhesive or an adhesive mixture, in particular a dispersion adhesive, a hot-melt adhesive, a rubber adhesive, and/or a acrylate adhesive. Security element (1) according to one of the preceding claims, characterized in that the security element (1) has a thickness (15) between 20 µm and 400 µm, preferably between 40 µm and 300 µm, particularly preferably between 50 µm and 250 µm, in particular between 60 µm and 200 µm. Security element (1) according to one of the preceding claims, characterized in that the self-adhesive layer (3) is delimited by a detachable protective layer (16), in particular by a protective film which can be removed without leaving any residue. Security element (1) according to one of the preceding claims, characterized in that the security element (1) has additional layers, which additional layers include in particular protective lacquers, heat-sealing lacquers, adhesives, primers and/or foils.

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