EP2704128A2 - Seal - Google Patents

Abstract

The seal (1) has a first carrier layer (2) and a second carrier layer (3) which are connected to each other indirectly. The seal is fastened on a substrate (5). Indirect bonding between the first carrier layer and the second support layer is carried out in the dissociatable security area (6) and an inseparable composite area (7) such that, viewable irreversible detachment of the first carrier layer from the second carrier layer takes place in the security area, with the replacement experiment.

Description

The invention relates to a seal for temporary attachment to a substrate, comprising a first carrier layer, a second carrier layer, wherein the first carrier layer and the second carrier layer are at least indirectly interconnected, and wherein the seal is attachable to the substrate.

From the prior art seals are known in various configurations and for a variety of applications. Seals are often designed as multi-layered seals or sealing tapes. Seals typically serve to seal or seal objects, thereby realizing a detection capability that indicates whether, for example, a sealed package has already been opened. For example, seals are often used for sealing sales or transport packaging, containers, cassettes and objects for which a first opening certificate is to be realized. In particular, in the sealing of doors or loading openings on vehicles, seals serve to indicate or prove a manipulation or opening of the door or loading opening and an unauthorized access.

Seals or sealing tapes are usually applied to the surface of an object to be secured by adhering them, in particular in those areas of objects in which openings are provided. If the seal is manipulated or removed after application, unauthorized opening of the object can be detected by the missing or defective seal. Seals are often designed such that in a manipulation attempt at least one layer level of the security seal is irreversibly destroyed, causing the manipulation is recognizable. Furthermore, seals are also known which are irreversibly separated during detachment into a plurality of individual parts, so that a manipulation of the damaged seal can be recognized.

Of the prior art known seals often have the disadvantage that a manipulation of the seal by a professional attack and For example, a partial detachment of the seal is not displayed reliably.

Based on the aforementioned prior art, the invention is therefore an object of the invention to provide a seal, the handling is simplified and has an increased reliability in the display of manipulation attempts.

The above object is achieved in a generic seal initially and essentially by the fact that the at least indirect adhesive bond between the first carrier layer and the second carrier layer is formed at least in a detachable security area and an inseparable composite area such that in a detachment attempt a visible irreversible distancing of first carrier layer is carried by the second carrier layer in the security area.

The seal is thus constructed in such a way that the at least indirect adhesive bond between the first carrier layer and the second carrier layer is formed differently at least in a security area and a composite area, such that when the force is applied between the first carrier layer and the second carrier layer caused by a detachment attempt, a distancing of the first Carrier layer of the second carrier layer takes place in the security area, and that the composite area remains free of damage due to the force. By "distancing" is always meant a spatial retraction of the first of the second separation layer. In this case, for example, an irreversible distancing of about 0.1 mm is provided, in particular to visualize a distancing in two complementary colors. The distancing can take place in such a way that the first carrier layer and the second carrier layer are connected only to the at least one composite region and are separated from one another in the security region or security regions. A distancing can be done by removing the carrier layers from each other in the range of a fraction of a millimeter to several centimeters.

It is preferably provided that the first carrier layer is arranged in the intended use as the outer layer of the seal. Below the first carrier layer, the second carrier layer is arranged, wherein the first carrier layer and the second carrier layer are at least indirectly connected to each other, which means that between the first carrier layer and the second carrier layer further layers, in particular layers with security features, may be present, however Contribute adhesive bond between the first carrier layer and the second carrier layer.

Advantageously, one of the carrier layers, in particular the second carrier layer, has adhesive properties, namely such that the second carrier layer adheres to a substrate. For example, the second carrier layer is made of polyurethane, so that the seal with the second carrier layer can be fastened on a substrate. The second carrier layer is in particular formed as a homogeneous layer. Such a second carrier layer advantageously combines the properties of an adhesive layer and a supporting layer.

The adhesive bond between the first carrier layer and the second carrier layer is formed differently in subregions arranged in the structure of the seal, namely in a security area and in a composite area. The adhesive bond - the adhesion between the layers - is greater in the composite area than the adhesive bond in the security area. As a result, when the force is applied, in particular in the case of a force caused by a detachment test, between the first and second carrier layers, which occur, for example, in the form of tensile or shear forces relatively between the first carrier layer and the second carrier layer, a separation of the first carrier layer from the second carrier layer only in the security area. The distancing of the first carrier layer from the second carrier layer in the security area causes an irreversible visible to the naked eye change of the seal.

The adhesive bond between the first carrier layer and the second carrier layer in the composite region is formed so strongly that no separation of the first carrier layer and the second carrier layer in the composite region, in particular in a force caused by a detachment force, takes place - the first carrier layer is inseparably connected to the second carrier layer. Consequently, "inseparable" in this context means that the first carrier layer and the second carrier layer, although through the use of Tools or other aids are basically separable, but not by a proper use of the seal during a detachment attempt or during a detachment.

By "separation" is always meant a permanent and irreversible removal of the layers from one another, namely a detachment of a layer from another layer or a separation of the layer composite by at least partial detachment of individual layers from one another. If the "separability" in the security area is mentioned, then this means that a separation takes place in the area of the security area between the first carrier layer and the second carrier layer or in one of the layers arranged therebetween by a detachment attempt. In the security area, there is thus at least one layer composite between any two layers that can be separated, in particular that is distanced by detachment of the seal.

A force is applied - as already described - for example by a detachment attempt or a detachment of the seal after application to a substrate by an authorized or unauthorized user. Each detachment attempt or detachment of the seal after application to a substrate causes the adhesive bond between the first carrier layer and the second carrier layer to be separated in the security area, namely one layer at least partially detached from another layer, resulting in irreversible visible distancing in the region Security area leads. Preferably, the adhesive bond between the first carrier layer and the second carrier layer in the composite region has a thickness which exceeds the force required for plastic deformation of the first and / or second carrier layer. Preferably, the strength of the adhesive bond between the first and second carrier layer in the composite region also exceeds the tear strength of the first carrier layer and / or the second carrier layer.

Overall, such an embodiment of the seal, for example, that in a detachment attempt, the seal after application to a substrate, ie in normal use, in the composite areas, by the strong cohesion between the first carrier layer and the second carrier layer, first detached from the substrate, said the security areas due to the lack or lower power transmission through the separation and the distancing adhere to the substrate longer and are replaced only after the detachment of at least a portion of the composite regions.

Advantageously, the adhesive force of the second carrier layer is designed and adjusted such that the adhesion of the seal to the substrate is greater than the adhesive bond between the first carrier layer and the second carrier layer in the security area, so that first of all a distancing takes place in the security areas, wherein subsequently successively a detachment of the seal from the substrate takes place first in the composite areas and finally in the security areas. As a result of the composite regions, connecting webs are formed between the first and second carrier layer, via which a force transmission between the first and second carrier layer is possible.

In a peel attempt or after the release of the seal from a substrate, the layers in the security area have moved away from each other. The distance between the first carrier layer and the second carrier layer in the security area is then preferably at least 1 mm, in particular between 1 mm and 3 mm. By way of example, it is also provided that, when the first carrier layer is distanced from the second carrier layer during detachment, the second carrier layer forms irreversible bubbles. Any separation of the first carrier layer and the second carrier layer in the security area is indicated by an irreversible visible change in the security area.

In order to increase the security against forgery of the seal, it is preferably provided that at least one layer on the side of the first carrier layer facing away from the second carrier layer, between the first carrier layer and the second carrier layer and / or on the side of the second carrier layer facing away from the first carrier layer provided with colors and / or security features, in particular full or partial area layers, for example, with UV and / or IR radiation and / or temperature-reactive colors, pigments, bleeding colors, security coatings and / or security adhesives are provided.

The carrier layers are advantageously formed from a material which has a strong structural internal cohesion, namely in particular a high tear strength, for example films, fabrics or fiber materials. Suitable materials for the first carrier layer and the second carrier layer are, for example, any plastics, in particular polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polycarbonate (PC), polylactide (PLA) or polyurethane.

The adhesive bond between the first carrier layer and the second carrier layer can preferably be achieved at least in part by an adhesive layer-intermediate adhesive layer-being arranged between the first carrier layer and the second carrier layer in the composite region or in the composite regions. The adhesive force of the adhesive layer between the first carrier layer and the second carrier layer is stronger than the adhesive force between the seal and the substrate, so that with each separation attempt of the seal from the substrate - after application to the substrate - only a separation between the first carrier layer and the second carrier layer in the security area, while no separation takes place in the composite area, because this is held inseparable from the adhesive layer. The adhesion of the adhesive layer to the first and second carrier layer is preferably stronger than the tear strength of the first carrier layer and / or the second carrier layer. In particular, the use of a thermally activable cohesive compound, for example thermally activated pressure-sensitive adhesive, has proven to be advantageous. Also, a thermoplastic polyurethane film, which is melted between the first carrier layer and the second carrier layer and thereby connects the carrier layers, is provided as a connecting means in the composite region. The adhesive layer is provided fully or partially between the first and second carrier layer.

The seal has the advantage that it can be removed in one piece from a substrate by virtue of the internal cohesion achieved between the first carrier layer and the second carrier layer by means of the composite regions. This has proven to be particularly advantageous in sealing objects - substrates - which are often sealed because the seal is releasable from the substrate in a single operation, with an irreversible visible change of the seal, so that the manipulation by the changed or missing seal is recognizable.

In order to further improve the security against manipulation of the seal, in particular to make it possible to detect a removal of the seal, it is provided according to a first embodiment that at least one separating layer is arranged on the side of the second carrier layer facing away from the first carrier layer, and that the separating layer is irreversibly changed in a peeling test by the release liner at least partially remains on the substrate, in particular that the release liner comprises at least one color layer and at least one adhesive adjustment layer. The separating layer is designed in such a way that it is ensured that, in the case of a detachment attempt or detachment, at least partial splitting of the separating layer as well as distancing in the security area of the seal take place. The detachment test can therefore be recognized on the seal and on the substrate. The separating layer is formed, for example, such that the ink layer remains on the substrate in the regions in which an adhesive setting layer is arranged between the ink layer and the second carrier layer, in particular in that the adhesive setting layer locally reduces the adhesion between the second carrier layer and the ink layer.

The detachability of the seal can be further improved according to a further embodiment in that the first carrier layer and the second carrier layer are formed such a tear-resistant that a one-piece detachment of the seal from the substrate is possible. This embodiment is particularly advantageous if no separating layer is provided between the second carrier layer and the substrate, since the seal is preferably suitable for one-piece and residue-free detachment.

In order to fasten the seal to a substrate, according to a next embodiment, it has proven to be advantageous that an adhesive layer is provided, and that the seal with the adhesive layer can be fastened to the substrate. The adhesive layer is consequently applied as a separate layer to one of the further layers, preferably to the second carrier layer. The adhesive layer is arranged, for example, directly on the second carrier layer on the side of the second carrier layer facing away from the first carrier layer. The adhesive layer is provided fully or partially. Advantageously, the adhesive force of the adhesive layer is designed and adjusted such that the adhesion of the seal to the substrate is greater than the adhesive bond between the first carrier layer and the second carrier layer in the security area, so that initially a distancing takes place in the security areas, wherein subsequently one after the other The seal is removed from the substrate initially in the composite areas and finally in the security areas. The sequence of detachment of the security and composite areas also depends on the manner of removal. If the seal is peeled off at a steep angle, the security areas in front of the composite areas or at the same time as the composite areas are detached from the substrate. As a result of the composite regions, connecting webs are formed between the first and second carrier layer, via which a force transmission between the first and second carrier layer is possible.

To achieve a further preferred adhesive bond between the first carrier layer and the second carrier layer in the composite region has been found according to a first embodiment to be advantageous if it is provided that the first carrier layer and the second carrier layer in the composite region are directly connected to each other, in particular, that the first carrier layer and the second carrier layer are welded together. As a result of the direct connection of the first carrier layer to the second carrier layer, an advantageous composite region can be achieved between the first carrier layer and the second carrier layer whose adhesive bond is always sufficiently strong that no separation takes place in the region of the composite regions during a detachment attempt of the seal, but only always a separation in the security areas, in which a lower adhesion between the first carrier layer and the second carrier layer is realized directly or indirectly.

The direct connection between the first carrier layer and the second carrier layer can be produced, for example, by applying the first carrier layer in the liquid state to the second carrier layer or vice versa-at least partially-and then curing, whereby in the contact regions a direct connection between the first carrier layer and the second Carrier layer is produced. Furthermore, it is envisaged that the first carrier layer is welded in the composite regions with the second carrier layer. The welding of the first carrier layer to the second carrier layer can be achieved by any heat input and / or pressure in the seal in the region of the composite regions, in particular by high-frequency or ultrasonic welding.

It is further provided that one of the carrier layers, in particular the second carrier layer, consists of a thermoplastic polyurethane film, and that the second carrier layer is locally melted by the introduction of temperature to connect to the first carrier layer - as a composite region.

With regard to the security of the seal has been found to be advantageous if it is provided according to a further embodiment that a plurality of composite regions are provided, in particular that the composite regions are at least partially punctiform and / or linear, preferably that the composite regions at least partially distributed regularly in the area of the seal. The composite regions are always arranged between the first carrier layer and the second carrier layer next to the security regions, it being provided, for example, that the composite regions do not adjoin one another and are arranged independently of one another. Furthermore, it is also provided that a plurality of security areas is present, but it is particularly preferred if the areas lying between the composite areas, namely the security area, are connected.

The composite regions are preferably at least partially punctiform, so that the first carrier layer and the second carrier layer are punctiform - inseparable - connected. By punctiform on the one hand a circular outer contour of the composite regions meant, on the other hand, however, also composite regions with any geometric outer contour, in particular polygonal or star-shaped. The composite regions are advantageously distributed regularly between the first carrier layer and the second carrier layer, which means that the composite regions are arranged approximately equidistant from each other. Preferably, the composite regions are aligned on an arbitrary grid and distributed between the first and second carrier layer.

In particular, in the case of seals which have a limited area, for example sealing labels, it has proven advantageous if the composite regions are linear, in particular if the composite regions are arranged linearly in at least one edge region of the seal, for example such that the composite regions carry the seal surrounded by a circumferential border. It is further advantageous for a seal, which is designed as a sealing strip, provided that the composite regions extend linearly on both sides parallel to the longitudinal extent of the seal. Advantageously, point-shaped, evenly distributed composite regions are provided in such a sealing band between the line-shaped composite regions. In addition, it is advantageously provided that the composite regions extend linearly transversely to the longitudinal extent of the seal and are arranged at a distance parallel to each other.

Preferably, the area fraction of the composite areas on the total area of the seal is less than the area ratio of the security areas. For example, the proportion of composite areas is between 10% and 20% of the total area of the seal.

The handling of the seal can be simplified according to a further embodiment in that the adhesive layer is arranged on the side facing away from the first carrier layer side of the second carrier layer, and that the adhesive layer covers the second carrier layer over part of the area. For fixing the seal on a substrate, the adhesive layer is arranged on the underside of the seal, namely on the side of the second carrier layer facing away from the first carrier layer. Advantageously, the adhesive layer is applied directly to the second carrier layer. The seal can be fastened with the adhesive layer on a substrate in such a way that after the seal has been applied to the substrate, a detachment test is indicated by an irreversible visible change in the security area of the seal, by a distancing between the first carrier layer and the second carrier layer, ie an indirect or immediate separation of layers between the first and second carrier layer or the carrier layers directly, takes place in the security area.

In order to enable a detachment of the seal from an object - a substrate - in a simple manner, for example after a shipping object has reached its intended recipient, it is provided that in at least one edge region, a non-adhesive gripping area is arranged so that the seal im on the substrate applied state in the edge region loosely rests on the substrate. The non-adhesive gripping region is formed, for example, in such a way that the adhesive layer only partially covers the second carrier layer, so that a non-adhesive gripping region is formed in at least one edge region, preferably in at least two edge regions, so that the seal can be gripped by a user in the gripping region, to be detached from the substrate, wherein there is always a distancing of the first carrier layer from the second carrier layer in the security area. The first carrier layer and the second carrier layer are held together in the composite regions and not separated from each other. Alternatively, the non-adhesive gripping region can also be realized in that the first carrier layer has a larger area than the second carrier layer, so that it serves directly as a gripping region or, for example, is turned over. The gripping region is preferably designed as a composite region.

Advantageously, a gripping area is provided on two opposite side regions of the seal, so that the seal can be detached from both sides. In particular, with round seals, however, a circumferential gripping area has been found to be advantageous, which is arranged on all sides of the seal. In the case of two oppositely arranged gripping regions, for example, only the gripping regions are designed as composite regions, while a safety region is arranged between the gripping regions.

The functionality achieved by the seal can be further improved according to a further embodiment in that the first carrier layer and the second carrier layer have different material properties, in particular that the second carrier layer has a lower deformation resistance than the first carrier layer, preferably that the second carrier layer has a has greater plastic formability than the first carrier layer. The second carrier layer thus deforms with the same force stronger than the first carrier layer, which, among other things, facilitates detachment of the seal from an object. Due to the easier deformability of the second carrier layer, namely the lower resistance to deformation, the seal is always distanced in a security case in a detachment attempt of the seal from a substrate, since tensions arise by the different deformation of the first carrier layer and the second carrier layer.

In the case of a detachment attempt of the seal from the substrate, the composite regions are first detached from the substrate due to the force transmission in the composite regions, wherein the seal is elastically and plastically deformed in the security regions, in particular the second carrier layer, so that initially no peeling occurs and only after the adhesive strength of the first adhesive layer is achieved and a detachment of the seal in the security areas. The seal thus dissolves unevenly from the substrate in a manner defined by the distribution of the composite regions and security regions.

Preferably, the second carrier layer, which faces the substrate in the applied state of the seal, is thinner, softer, more flexible, more expansible and / or bendable than the first carrier layer. More preferably, the second carrier layer has a greater plastic deformability than the first carrier layer, which means that the second carrier layer plastically deformed by a higher percentage than the first carrier layer, before any destruction of the second carrier layer occurs. The second carrier layer has a higher elongation at break than the first carrier layer. Due to the greater plastic formability of the second carrier layer, the second carrier layer is irreversibly plastically deformed during a detachment attempt in such a way that the detachment test is indicated irreversibly visibly by the plastic deformation. Advantageously, the second carrier layer is irreversibly stretchable. In particular, the second carrier layer is tear-resistant, so that it remains always in one piece even with high elongation.

The first carrier layer is advantageously formed dimensionally stable, so that they do not deform or only very slightly during normal use of the seal. A preferred seal thus has a very stable first carrier layer and a easily deformable or stretchable second carrier layer, in particular so that a distancing of the carrier layers is always caused by a plastic deformation of the second carrier layer.

For example, the first carrier layer and the second carrier layer are made of the same material, it being provided that the second carrier layer, which faces the substrate in the applied state, is thinner than the first carrier layer, so that the second carrier layer is different due to the different thickness Has material properties. However, it is also provided that the first carrier layer and the second carrier layer are made of different materials, for example of different plastics.

The use of a stable and resistant first-to-upper support layer simplifies the handling of the seal, since a dimensional stability of the seal is ensured by the first support layer. Furthermore, the second carrier layer and the further layers of the seal are protected by the first carrier layer from external influences. The second carrier layer is easily deformable, so that when the seal is detached from a substrate, the second carrier layer separates in the security regions and preferably deforms like a balloon under irreversible stretching.

In order to display a detachment attempt of the seal in a simple manner, it is provided according to a further embodiment of the seal that at least one color layer between the first carrier layer and the second carrier layer is arranged at least in the security area, in particular that additionally at least one separating layer is provided, preferably that two Color layers are provided. In the security area between the first carrier layer and the second carrier layer, at least one color layer is arranged, which is at least partially destroyed during the separation of the security area between the first carrier layer and the second carrier layer. This color layer at least partially causes the irreversible visible change in the seal during a detachment attempt.

Preferably, a separating layer is provided in addition to the color layer, so that a separation in the security area between the first carrier layer and second carrier layer is effected in that the ink layer is not lifted off or destroyed there, where the separation layer is provided, and the color layer is lifted off in the areas in which no separation layer is provided, so that, for example, with a corresponding arrangement of the separation layer and / or the color layer, for example, when separating in the security area a logo, logo or string is visible. If, for example, the composite region forms a peripheral frame, the separating layer is provided in the inner region of the frame completely or partially. Advantageously, it is also provided that the separating layer between the first carrier layer and the second carrier layer is provided fully or partially in relation to the surface of the carrier layers. Such a separating layer, in particular in the edge region of the carrier layers, has the advantage that air can flow in between the carrier layers in the region of the separating layer upon detachment of the seal, whereby a plastic deformation of the second carrier layer is favored.

Advantageously, in addition to a separating layer, two color layers are provided, which are formed, for example, as complementary colors, so that when the first carrier layer and the second carrier layer are separated in the security area an image of complementary colors can be displayed which indicates a detachment attempt of the seal as an optically irreversible change.

For example, at least one fully or partially colored ink layer is provided between the first carrier layer and the second carrier layer. In particular, the color layer is provided only in the security areas. In the event that the composite region is formed like a frame, the color layer is provided over the entire surface in the interior. It is further provided that at least one color layer is provided on the side facing away from the first carrier layer side of the second carrier layer, in particular a full-surface ink layer whose area corresponds to the surface of the carrier layers. Such a color layer offers the advantage that the composite areas also appear colored by this color layer.

An anti-counterfeiting security of the seal can be realized according to a further embodiment in that at least in the material of the first carrier layer and / or at least in the material of the second carrier layer security features are present, in particular to UV radiation and / or IR radiation and / or temperature-responsive pigments or colors are present. The security features are introduced, for example, in the production of the first carrier layer and / or the second carrier layer in the material of the carrier layer, so that the authenticity of the seal can be checked based on the pigments or on the reacting to UV or IR radiation colors. For example, the security features may be supplemented with images and / or characters provided on further layers, so that an unmistakable proof of authenticity can be created together with the security features in the first and / or second carrier layer.

In order to enable air to flow in between the first carrier layer and the second carrier layer upon detachment of the seal, according to a further embodiment it is provided that the first carrier layer and / or the second carrier layer are permeable to air, in particular that the first carrier layer and / or the second carrier layer are perforated. An air-permeable carrier layer is formed for example by a fabric. By perforating at least one carrier layer, the seal is made at least partially permeable to air.

A visible irreversible change of the seal by a detachment test can advantageously be recognized in that the first carrier layer and / or the second carrier layer is at least partially transparent, in particular that in the intended condition of the seal at least one carrier layer facing the viewer is transparent at least in the security area , In addition to the recognizability of visible irreversible changes between the first carrier layer and the second carrier layer or one of the two carrier layers, further information can be deposited within the seal which can be recognized by the at least one transparent carrier layer. For example, if the seal is applied to a glass pane, the carrier layer facing the glass pane - the second carrier layer - is transparent in the security area, so that the security area can be seen through the glass pane. The visibility of the distancing between the first carrier layer and the second carrier layer is realized, for example, in that either the first carrier layer and / or the second carrier layer or the further layers, which must be transparent to the recognizability of the distancing, are at least partially transparent.

According to a further embodiment, which is particularly suitable for seals which are designed as sealing bands, it is provided that an adhesive-repellent layer is arranged on the side of the first carrier layer facing away from the adhesive layer. If, for example, the seal is designed as a sealing strip, the adhesive-repellent layer allows the seal to be rolled up in roll form without distancing in the region of the security area during unrolling for intended use, so that detachment of the seal from itself, namely the adhesive layer from the adhesive layer Separation without triggering the security mechanisms of the seal, is possible. The seal is "activated" only when used as a seal, namely after application to a designated substrate.

A detachment of the seal from a substrate can be simplified in that the adhesive layer is designed and adjusted such that the seal can be detached from a substrate without residue. In this case, the adhesive layer always has a greater adhesion to the second carrier layer than to the substrate, so that no residues of the adhesive layer remain on the substrate when the seal is detached from the substrate.

According to a further embodiment of the seal, it is provided that the first carrier layer is formed such that the first carrier layer is dimensionally stable when the seal is detached from a substrate. For this purpose, the first carrier layer is for this purpose made of a plastic, for example, which does not or only to a very small extent elastically deform in the case of the forces occurring when the seal is detached from a substrate. The term "dimensional stability" is intended to mean that the first carrier layer does not change its thickness, width and length or only to a very small extent when the seal is detached from a substrate. By such a stable first carrier layer of the separation effect in the security area is increased, especially if the second carrier layer has a low deformation resistance to elastic and plastic deformation.

A seal arrangement has proven to be particularly advantageous which comprises a substrate, for example a paper, and a seal according to the invention. The seal is secured to the substrate with an adhesive layer or adhesive backing, with a print layer disposed beneath the seal and / or adjacent to the seal on the substrate. This print layer preferably contains information related to the seal. For example, the information: "If you can read this text, a seal has been removed." For example, the information is printed on the substrate, and then the seal is applied, thereby "activating" the seal and displaying each peel attempt by a visible change in the seal. The information indicating the possibly missing seal may also be openly readable next to the seal and / or under the seal, for example, a hatched area may be arranged together with information to be hidden.

A preferred seal comprises a first release layer of a transparent plastic, preferably polyvinyl chloride. The composite region is in the form of a frame, wherein the first carrier layer and the second carrier layer are directly or indirectly connected to a thermally activatable pressure-sensitive adhesive. In the inner region of the frame-like composite region, at least one at least partial area separating layer and at least one full-surface-in relation to the interior-color layer, preferably two full-surface layers of color, is provided. In particular, a layer of a pressure-sensitive adhesive is provided over the entire area directly on the second carrier layer in the inner area. On the side facing away from the first carrier layer side, only one with respect to the second carrier layer full-surface pressure-sensitive adhesive layer is provided, with which the seal is attachable to a substrate.

Another preferred seal also comprises a first release layer of a transparent plastic, preferably polyvinyl chloride. The composite region is in the form of a frame, wherein the first carrier layer and the second carrier layer are directly or indirectly connected to a thermally activatable pressure-sensitive adhesive. In the inner region of the frame-like composite region is at least one at least partial area separating layer and at least one full-surface - in relation to the interior - color layer, preferably two full-surface layers of paint, provided. In particular, a layer of a pressure-sensitive adhesive is provided over the entire area directly on the second carrier layer in the inner area. On the side facing away from the first carrier layer side of the second carrier layer at least one full-surface with respect to the second carrier layer ink layer is provided. The color layer is applied directly to the second carrier layer. Below the color layer, a pressure-sensitive adhesive layer for applying the seal from a substrate is provided.

Fig. 1

ein Ausführungsbeispiel eines Siegels in geschnittener Seitenansicht,

Fig. 2

ein weiteres Ausführungsbeispiel eines Siegels in geschnittener Seitenansicht,

Fig. 3a und 3b

weitere Ausführungsbeispiele von Siegeln in geschnittener Seitenansicht,

Fig. 4

ein Ausführungsbeispiel eines Siegels in Draufsicht,

Fig. 5

ein Ausführungsbeispiel eines Siegels in Draufsicht, und

Fig. 6

ein weiteres Ausführungsbeispiel eines Siegels in Draufsicht.

In particular, there are a variety of ways to design and develop the seal of the invention. Reference is made to both the claims subordinate to claim 1 and to the following description of preferred embodiments in conjunction with the drawings. In the drawing show

Fig. 1

an embodiment of a seal in a sectional side view,

Fig. 2

a further embodiment of a seal in a sectional side view,

Fig. 3a and 3b

further embodiments of seals in a sectional side view,

Fig. 4

an embodiment of a seal in plan view,

Fig. 5

an embodiment of a seal in plan view, and

Fig. 6

another embodiment of a seal in plan view.

Fig. 1 shows an embodiment of a seal 1 in a sectional side view. A first carrier layer 2 is arranged as the uppermost layer of the seal 1 above a second carrier layer 3 and an adhesive layer 4. The seal 1 can be fastened with the adhesive layer 4 on a substrate 5. Fig. 1 shows the seal 1 at the moment of application to the substrate 5. The first carrier layer 2 and the second carrier layer 3 are connected directly to each other. The adhesive bond between the first carrier layer 2 and the second carrier layer 3 is formed differently in security areas 6 and composite areas 7, namely, can be distanced in the security area 6 and inseparable in the composite area 7. The first carrier layer 2 and the second carrier layer 3 are connected together in the security area 6 in the initial state , wherein during a detachment attempt distancing takes place.

The first carrier layer 2 and the second carrier layer 3 are welded together in the composite regions 7, so that in a force effect between the first carrier layer 2 and second carrier layer 3, resulting for example in a separation attempt by a user, a distancing of the first carrier layer 2 of the second Carrier layer 3 takes place only in the security areas 6. The composite regions 7 hold the first carrier layer 2 and the second carrier layer 3 together, so that no distancing takes place. The composite regions 7 are provided like webs between the first carrier layer 2 and the second carrier layer 3.

The adhesive layer 4 is formed in this embodiment such that after applying the seal 1 on the substrate 5 in a peel attempt always a distancing between the first carrier layer 2 and second carrier layer 3 in the security areas 6, before first detachment of the seal 1 of the Substrate 5 takes place in the composite regions 7 and then in the security areas 6. The second carrier layer 3 has a lower deformation resistance than the first carrier layer 2. Due to the composite regions 7, at least in the composite regions 7, there is a surface force transmission from the first carrier layer 2 to the second carrier layer 3, so that the composite regions 7 are detached despite the deformability of the second carrier layer 3. The security areas 6 are, however, initially not detached, since first a deformation of the second carrier layer 3 in the security areas 6 takes place before the seal 1 is replaced in these areas. Due to the deformation of the second carrier layer 3 in the security regions 6, there is always a distancing between the first carrier layer 2 and the second carrier layer 3.

Fig. 2 shows a further embodiment of a seal 1 in a sectional side view. The first carrier layer 2 and the second carrier layer 3 are connected by a second adhesive layer 8 in the composite regions 7. In addition to the composite regions 7, the security regions 6 are arranged which, in the case of a detachment attempt of the seal 1, are distanced from a substrate (not shown in this exemplary embodiment). With the adhesive layer 4, the security seal 1 can be fastened on a substrate 5. In this case, the second adhesive layer 8 has an adhesive force which is stronger than the tensile strength of the first carrier layer 2 and the second carrier layer 3, so that there is no separation of the first carrier layer 2 and the second carrier layer 3 in the composite region 7 during a detachment attempt. The first carrier layer 2 and the second carrier layer 3 are so tear-resistant that the seal 1 is in one piece detachable from a substrate. Before a distancing would take place in the composite region 7, the seal 1 detached from the substrate 5 via the second adhesive layer 4.

Fig. 3a shows a further embodiment of a seal 1 in a sectional side view. The first carrier layer 2 and the second carrier layer 3 are welded together in composite regions 7. The seal 1 is by means of an adhesive layer 4 on a - not shown substrate 5 - applied. The composite regions 7 extend in a line through the seal 1.

Fig. 3b shows a further embodiment of a seal 1 in a sectional side view. The first carrier layer 2 and the second carrier layer 3 are directly connected to each other in the connection regions 7 by being welded together. Below the second carrier layer 3, an adhesive layer 4 extends over part of the area, with which the seal 1 can be applied to a substrate 5 (not shown). The adhesive layer 4 extends only part of the area below the second carrier layer 3, so that in each case a non-adhesive gripping region 9 is formed in two opposite edge regions of the seal 1, in which the seal 1 for removal from the substrate 5 by a user can be attacked in a simple manner. The adhesive layer 4 is designed with respect to its adhesive force such that, before a detachment of the seal 1 from a substrate 5 takes place, initially a distancing between the first carrier layer 2 and the second carrier layer 3 takes place in the security regions 6.

In the security areas 6 is in the embodiments according to Fig. 3a and Fig. 3b between the first carrier layer 2 and second carrier layer 3 in addition to a color layer 10, a release layer 11 is provided, wherein the release layer 11 is applied in the form of characters, so that when distancing the security areas 6 between the first carrier layer 2 and second carrier layer 3, these characters in the Color layer 10 can be seen. These signs represent the irreversible optical change of the seal 1. Before the seal 1 is detached from a substrate 5 in the security regions 6, it initially dissolves in the composite regions 7, since the first carrier layer 2 is here directly connected to the second carrier layer 3 is, so that via the composite regions 7 a force transmission from the first carrier layer 2 to the second carrier layer 3 and thus in the composite regions 7 also on the adhesive layer 4 takes place.

Fig. 4 shows an embodiment of a seal 1 in a plan view, wherein the seal 1 as a flat seal - seal label - is formed. Below the first carrier layer 2, the composite regions 7a, 7b are shown with dashed lines. The composite region 7a extends linearly as an edge surrounding the seal 1. The composite regions 7b are punctiform and extend uniformly over the surface of the seal 1 distributed. The composite regions 7b are arranged like a grid and each have an identical distance from each other. The security area 6 is formed integrally and is enclosed by the frame-type composite area 7b. Surrounding the frame-like composite region 7a is arranged an adhesive-free gripping region 9, on which the seal 1, in particular the second carrier layer 3, can be grasped by a user in a simple manner.

Fig. 5 shows an embodiment of a seal 1, which is designed as a sealing band. Fig. 5 shows a portion of the seal 1, in which below the first carrier layer 2, two arranged in the edge region and parallel to the longitudinal extent of the seal 1 extending composite region 7a are arranged. The composite regions 7a are formed like a line. The composite regions 7b, which connect the first carrier layer 2 and the second carrier layer 3 to one another, are arranged uniformly distributed between the composite regions 7a. The seal 1 is on its underside over its entire surface of an adhesive layer 4, so that it can be stuck onto a surface, in particular a substrate 5. The security area 6 is designed to be continuous between the composite areas 7a and is only interrupted by the uniformly arranged composite areas 7b.

Fig. 6 shows a further embodiment of a seal 1, which is designed as a sealing band. Below the first carrier layer 2 extend the composite regions 7, which are formed in this embodiment as diagonally arranged, contiguous ovals. With a detachment of the seal 1, the first carrier layer 2 is distanced from the second carrier layer 3 in the security area 6, wherein no distancing of the first carrier layer 2 and the second carrier layer 3 takes place in the composite regions 7.

Claims (21)

Seal (1) for temporary attachment to a substrate (5), with a first carrier layer (2), and a second carrier layer (3), wherein the first carrier layer (2) and the second carrier layer (3) are connected to one another at least indirectly, and wherein the seal (1) can be fastened on the substrate (5),
characterized,
that the at least indirect bond between the first support layer (2) and the second carrier layer (3) is adapted at least in a distanzierbaren security area (6) and an inseparable composite region (7) that, in a peel test a visible irreversible detachment of the first support layer ( 2) of the second carrier layer (3) in the security area (6). Seal (1) according to claim 1, characterized in that on the side facing away from the first carrier layer (2) side of the second carrier layer (3) at least one release liner is arranged, and that the release liner irreversibly changed in a separation attempt by the release liner at least partially on the substrate (5) remains, in particular, that the separating layer comprises at least one color layer and at least one adhesive setting layer. Seal according to claim 1, characterized in that the first carrier layer (2) and the second carrier layer (3) are tear-resistant such that the seal (1) is detachable from the substrate (5) in one piece. Seal (1) according to one of claims 1 to 3, characterized in that an adhesive layer (4) is provided, and that the seal (1) with the adhesive layer (4) on the substrate (5) can be fastened. Seal (1) according to one of claims 1 to 4, characterized in that the first carrier layer (2) and the second carrier layer (3) in the composite region (7) are connected directly to each other, in particular that the first carrier layer (2) and the second carrier layer (3) are welded together. Seal (1) according to one of claims 1 to 5, characterized in that a plurality of composite regions (7) are provided, in particular that the composite regions (7) are at least partially punctiform and / or linear, preferably that the composite regions ( 7) are distributed at least partially regularly in the surface of the seal (1). Seal (1) according to one of claims 4 to 6, characterized in that the adhesive layer (4) on the side facing away from the first carrier layer (2) side of the second carrier layer (3) is arranged, and that the adhesive layer (4) the second Carrier layer (3) partially covered. Seal (1) according to one of claims 1 to 7, characterized in that in at least one edge region of the seal (1) a non-adhesive gripping region (9) is arranged, so that the seal (1) applied to a substrate (5) state in the edge region loosely rests on the substrate (5). Sealing (1) according to claim 8, characterized in that the gripping region (9) is designed as a composite region (7). Sealing (1) according to claim 8 or 9, characterized in that the gripping region (9) is arranged at least at two opposite side regions of the seal (1), in particular circumferentially around the seal (1) is arranged. Seal (1) according to one of claims 1 to 10, characterized in that the first carrier layer (2) and the second carrier layer (3) have different material properties, in particular that the second carrier layer (3) has a lower deformation resistance than the first carrier layer ( 2), it is preferred that the second carrier layer (3) has a greater plastic deformability than the first carrier layer (2). Seal (1) according to one of claims 1 to 11, characterized in that the second carrier layer (3) is irreversibly stretchable. Sealing (1) according to one of claims 1 to 12, characterized in that the second carrier layer (3) forms at least partially irreversible bubbles during a detachment process from the substrate (5). Seal (1) according to one of claims 1 to 13, characterized in that at least in the security area (6) at least one color layer (10) between the first carrier layer (2) and second carrier layer (3) is arranged, in particular, that in addition at least one release layer (11) is provided, preferably, that two color layers are provided. Seal (1) according to one of claims 1 to 14, characterized in that at least in the material of the first carrier layer (2) and / or at least in the material of the second carrier layer (3) security features are present, in particular UV radiation and / or IR radiation and / or temperature-responsive pigments or colors are present. Seal (1) according to one of claims 1 to 15, characterized in that the first carrier layer (2) and / or the second carrier layer (3) are permeable to air, in particular that the first carrier layer (2) and / or the second carrier layer ( 3) are perforated. Seal (1) according to one of claims 1 to 12, characterized in that the first carrier layer (2) and / or the second carrier layer (3) are at least partially transparent, in particular that in the intended condition of the seal (1) at least one the wearer facing carrier layer (2, 3) at least in the security area (6) is transparent. Sealing (1) according to one of claims 1 to 17, characterized in that on the side facing away from the second carrier layer (3) side of the first carrier layer (2) an adhesive-repellent layer is arranged. Seal (1) according to one of claims 4 to 18, characterized in that the adhesive layer (4) is designed and adjusted in such a way that the seal (1) can be detached from the substrate (5) without residue. Seal (1) according to one of claims 1 to 19, characterized in that the first carrier layer (2) is formed such that the first carrier layer (2) in a detachment of the seal (1) from a substrate (5) substantially dimensionally stable is. Sealing arrangement, comprising a substrate (5) and a seal (1), wherein the seal (1) is arranged on the substrate (5), characterized in that the seal (1) is designed according to one of claims 1 to 20, and in that at least one printing layer, which is visible after removal of the seal, is arranged below the seal (1) on the substrate (5), in particular that the printing layer contains information related to the seal (1).

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