DE112016005459B4 - SECURITY TAPE - Google Patents

Abstract

Multilayer security adhesive tape (50) with a backing layer (1) and a continuously applied first colored layer (2), a locally applied second colored layer (41, 42) and a partially applied release force-controlling functional layer (61, 62) and a continuously applied adhesive layer (3) , wherein the release force-controlling functional layer (61, 62) is arranged between the carrier layer (1) and the second color layer (41, 42), characterized in that the boundaries of the functional layer (61, 62) lie within boundaries of the second color layer (41, 42 ) are provided, and that the functional layer (61, 62) and the second color layer (41, 42) are each in the form of at least two longitudinal strips that extend in the longitudinal direction (L) of the adhesive security tape (50), and wherein the external shape of the second colored layer (41, 42) and the release force-controlling functional layer (61, 62) are matched to one another.

Description

The invention relates to a multilayer adhesive security tape with a backing layer and a continuously applied first color layer.

A large number of multilayer adhesive articles for tamper evidence with different layer structures are known in the prior art.

In the DE 10 2008 030 935 A1 describes a layer structure with the so-called tamper-evident effect with two color layers applied over the entire surface with an intermediate adhesion-controlling functional layer not applied over the entire surface, which is also called a marking layer. The adhesion-controlling functional layer influences the force to be applied locally to separate the two layers of paint, the separating force. It leads to a defined area-wise separation by displaying a logo or lettering that is used to prove tampering.

A similar principle is evident from both the U.S. 5,633,058 known, as well as from the DE 199 63 709 A1 .

In all cases mentioned, however, two color layers applied over the entire surface are provided, between which an adhesion-controlling functional layer is arranged directly or indirectly.

However, disadvantages of the product structure for generating the tamper-evident effect are evident in the producibility, the machine processability and in special application situations.

The problem with the above structure is the full-surface separation of the two layers of paint. Even the finishing of the security tape poses difficulties, since the easy-to-separate layers of paint are damaged during a cutting or punching process and in many cases are caused to partially release. In addition, after successful cutting by z. B. relaxation processes in the adhesive or transfer of the adhesive at the cutting edge of a tape to a partial separation of the layers. This is particularly disadvantageous for the mechanical application of the tape, since the separation at the cutting edges leaves residues on the upper side of the tape when it is unwound; these lie on the guide rollers of the security tape applicator and cause significant soiling, which leads to downtimes due to cleaning.

Especially when gluing shipping boxes and their containers with a lid consisting of two flaps, the full-surface separation of the colors is a disadvantage. Since the flaps of the box always have a gap, two different problems can arise.

On the one hand, when the security tape is opened, a continuous layer of the lower color forms. This lower layer of paint spans the gap in the flaps and can lead to contamination of the interior of the packaging once the flaps have been opened. Particles or strips of the material fall into the packaging space and attach themselves to the goods inside. This contamination is undesirable, especially for sensitive products such as pharmaceuticals.

On the other hand, if there is a larger gap in the flaps, the goods inside can touch the packaging tape during shipping. This contact can lead to partial separation of the layers and thus to adhesion. It is an object of the invention to provide a multilayer adhesive security tape which reduces or even avoids the disadvantages mentioned.

From the WO 97/44769 A1 describes a multilayer film having a flexible layer and a pressure sensitive adhesive layer for attaching the multilayer film to a smooth and rigid surface. A specific pressure-sensitive adhesive is fully inserted so that it can be removed from the surface again. The flexible layer preferably consists of at least one frangible layer and exhibits intralayer failure upon peeling of the multilayer film from the surface.

the DE 35 34 558 A1 describes a sticking material to prevent resticking. The adhesive material comprises an adhesive layer, a second layer laminated on a main surface of the adhesive layer, a release layer laminated on the second layer, and a first layer laminated on the release layer by coating a resin.

the EP 1 666 554 A1 describes a multilayer adhesive strip comprising a carrier based on a stretched thermoplastic film, the upper side of which can be coated with a release lacquer. The multilayer adhesive tape comprises a stretched thermoplastic film (TF)-based backing, the top surface of which may be coated with a release coating.

the DE 10 2013 203 727 A1 describes a label having a continuous transparent base layer, a marking layer, a fully or partially planar color layer and a superimposed adhesive layer. The adhesive layer is attached to a removable protective layer. A first layer of release agent is applied to the base layer and a non-stick top layer. A second layer of release agent is applied to the final non-stick layer and a layer to provide printability.

the EP 1 972 674 A1 describes a tamper-detecting security film that has a flexible plastic film carrier substrate, which carries a partial layer in the form of letters, symbols, lines, guilloches, numbers or characters of a release coating, as well as a full-surface, colored, transparent or metal coating, a full-surface transparent or colored release layer and a pressure sensitive adhesive coating.

the DE 10 2005 043 221 A1 describes a self-adhesive tape with a carrier layer and an adhesive layer, a primer layer being applied in sections to the carrier layer and a separating layer being arranged over the entire area between the adhesive layer and the primer layer or carrier layer to indicate unauthorized opening of a package sealed with the self-adhesive tape.

the DE 20 2016 001 544 U1 describes a security tape tamper-evident structure comprising a backing formed by a plastic film and an adhesive layer formed on the reverse side of the backing.

the DE 199 63 709 A1 describes an adhesive tape comprising a stretched thermoplastic film, a primer layer, two release layers and an adhesive layer. The adhesive tape comprises in sequence: a stretched thermoplastic film; a primer layer covering only part of the surface of the thermoplastic film and securely bonded to the thermoplastic film. A first release liner covers the entire surface of the primer coat and thermoplastic film, and a second release liner covers the entire surface of the first release liner.

the U.S. 5,633,058 A relates to a tape which, when removed, displays a notification that an object has been tampered with, for example, the tape having an adhesive layer on one surface.

The object is achieved by a multilayer adhesive security tape mentioned at the outset with the features of claim 1 . Preferred developments are the subject of the dependent claims.

The multilayer adhesive security tape of the invention has a backing layer and a first colored layer applied continuously, preferably to an underside.

A band is generally understood here as a structure that has a longitudinal direction and an extension in the longitudinal direction that is significantly larger, i.e. many times as large as a width of the band that runs perpendicular to the longitudinal direction, and this width in turn is significantly larger, ie many times as large as a height of the band, which runs perpendicular to the longitudinal direction and to the width of the band.

The carrier layer preferably extends over the entire length and width of the adhesive security tape. The carrier layer is preferably designed as a thermoplastic film based on polyethylene terephthalate (PET), polypropylene (PP) or polyvinyl chloride (PVC), but it can also consist of other transparent or semi-transparent plastic films.

A continuous application is understood to mean an application which extends over the entire length and width of the adhesive security tape, but which can be arranged in different layers along the height of the adhesive security tape. A continuous application can have different heights in different areas along the length and width of the security tape. However, it is preferably monocontinuous along its length and width.

According to the invention, a second color layer applied in certain areas and a release force-controlling functional layer applied in certain areas are provided, as well as a layer of adhesive, which in turn is applied continuously. In this case, the release force-controlling functional layer is arranged along a height of the adhesive security tape between the backing layer and the second colored layer.

A layer applied in certain areas is understood to mean a layer which is applied along the length and width of the adhesive security tape only in precisely these areas and is not otherwise applied. However, the layer applied in certain areas is not applied continuously. The areas complementary to the areas are free of the layer applied in areas.

The shapes along the length and width of the security adhesive tape of the second colored layer and the release force-controlling functional layer are matched to one another.

Boundaries of the areas of the functional layer are advantageously provided within boundaries of the areas of the second colored layer. The term boundary refers to the two-dimensional shape along the length and width of the adhesive security tape. Evidence of first opening is formed within the boundaries of the areas in which the functional layer and the second color layer are applied.

The functional layer applied in certain areas forms motifs, words, letters, characters or similar. or complements to motifs, words, letters, characters or similar. out. The second color layer, on the other hand, is continuously applied within the boundaries of the areas. This results in a particularly favorable tearing behavior.

Area-wise application of the second color layer is understood here to mean, for example, a strip-like application extending in a longitudinal direction of the adhesive security tape; the second color layer is preferably formed in the form of at least two, preferably exactly two, longitudinal stripes which extend in the longitudinal direction of the adhesive security tape and which run along one another are spaced at a constant distance along the entire longitudinal extent and each have a constant distance from an adjacent side edge of the adhesive security tape along the longitudinal direction.

The functional layer applied in certain areas has motifs, words, letters, characters or similar. on. On the one hand, like the second color layer, the functional layer is applied in regions, preferably in strips, in at least two, preferably exactly two, strips running in the longitudinal direction. On the other hand, the functional layer is only partially applied in the areas themselves. The partial order forms the motifs, words, letters, characters or similar. out. The second color layer, on the other hand, is continuous in the areas. Only the outer shape of the second colored layer and that of the release force-controlling functional layer are matched to one another, as discussed above.

The security tape is basically constructed in such a way that the areas of the security tape in which both two color layers and the functional layer are arranged one above the other enable proof of tampering, i.e. have a tamper-proof feature, while the areas in which the second color layer is not applied Security adhesive tape preferably only has a first colored layer and the layer of adhesive corresponds to a conventional adhesive tape without proof of tampering, which can be completely removed again after it has been stuck on, with the layer of adhesive remaining partially or completely or not at all on the surface to which the tape has been adhered.

Particularly preferably, neither two longitudinal edge strips nor a central longitudinal strip of the adhesive security tape have any evidence of tampering, while the at least two strips along which the second color layer is applied include evidence of tampering.

In the construction of the adhesive security tape according to the invention, the longitudinal edges are advantageously designed such that the separating force between the individual layers of the adhesive security tape is high, specifically so high that the adhesive security tape is completely detached from the surface after it has been pulled off. In contrast, the separating force between the layers of the area with tamper evidence is dimensioned in such a way that the adhesive security tape detaches between two layers, preferably detaches between the functional layer and the first color layer, so that after the carrier layer has been pulled off, parts of the adhesive security tape remain on the surface to be bonded; they have the function of proof of first opening.

The security tape is used in particular for gluing the flaps of boxes that have a gap between the flaps when they are folded. However, after opening, there is no connection between the parts of the security tape that remain stuck, so no parts of the security tape, in particular parts of the colored layer, can fall into the packaging or through the gap into the carton.

The layer of adhesive and the second colored layer are favorably colored in the same color. As a result, the second color layer is not recognized when viewing the security adhesive tape through the preferably transparent carrier layer, and only the first color layer appears to the observer as a homogeneous color layer extending over the entire security adhesive tape, so that from the outside the division into areas with tamper evidence and in Areas without proof of initial opening is not possible.

Favorably, a separating force between the functional layer and the first color layer is smaller than a separating force between the first color layer and the second color layer. This will the security tape between the functional layer and the first color layer is opened.

The separating force between the functional layer and the first colored layer is preferably smaller than a separating force between the carrier layer and the first colored layer and than a separating force between the first colored layer and the adhesive layer and than a separating force between the functional layer and the carrier layer. With this setting of release force, the release force-controlling functional layer remains on the backing layer on one side and the first and second color layer on the adhesive layer and thus on the surface to be bonded on the other side after the security adhesive tape has been opened.

The separating force between the functional layer and the first colored layer is preferably smaller than all other separating forces between immediately adjacent layers. As a result, the adhesive security tape opens independently of the rest of the layer structure in areas in which a functional layer is present, between the functional layer and the first colored layer.

Particularly in areas where the layer sequence has no release force-controlling functional layer, the release force between the first color layer and the second color layer is less than a release force between the second color layer and the layer of adhesive and also less than the release force between the first color layer and the backing layer. As a result, after opening, the second color layer remains on the layer of adhesive and the first color layer on the backing layer.

Preferably, the release force between the first color layer and the second color layer in areas where no release control layer is applied is smaller than all other release forces between immediately adjacent layers in the area. As a result of this setting of the release force, the adhesive security tape opens in areas without a release force-controlling functional layer between the first and the second colored layer.

Overall, when tearing open, the adhesive security tape separates between the functional layer and the first colored layer in areas in which a functional layer is present, and between the first and second colored layer in areas in which no functional layer is present.

The colors of the first and second color layers preferably have a clear contrast. As a result, after the tearing open, the two-dimensional shape of the functional layer becomes visible on the residues of adhesive security tape remaining on the surface, without the functional layer itself being visible there.

The separating force between the individual layers is often also referred to as adhesion or adhesive force.

The first colored layer preferably evenly covers the two functional layers and the carrier layer. A height of the first colored layer and in the predetermined areas a height of the first colored layer plus the covered functional layer are the same everywhere along the longitudinal direction and along the width of the adhesive security tape. The first colored layer is preferably coated onto the carrier layer and the functional layer. An underside of the first color layer is thus formed in a planar manner before it is torn open. In this embodiment, the first color layer is thinner in regions that extend along the longitudinal direction and the width, in which the functional layer is present. The first colored layer is thinner in these areas along the height by the height of the functional layer than in areas in which no functional layer is provided.

Preferably, the layer of adhesive is thinner in areas extending along the longitudinal direction and the width where the second color layer is present. However, it is also conceivable that the layer of adhesive nevertheless has a constant height along the width of the adhesive security tape. In particular, the areas not filled by the second color in a layer plane of the second color layer can be filled in some other way. In these areas, the layer of adhesive is thinner along the height by the height of the second colored layer than in areas in which no second colored layer is provided.

In other embodiments of the invention, the first colored layer is printed onto the carrier layer and the functional layer. In a printing process, the first layer of ink is given an equal height along its entire longitudinal extent and along the width of the security tape. However, the underside of the first colored layer is then no longer flat but takes on the profile of the carrier layer and the functional layer applied to the carrier layer.

• 1 ein erfindungsgemäßes, mehrschichtiges Sicherheitsklebeband vor einer Erstöffnung,
• 2 das Sicherheitsklebeband in 1 nach einer Erstöffnung,
• 3 eine Draufsicht auf einen auf einer Oberfläche verbleibenden Rest des geöffneten Sicherheitsklebebandes in 2.

The invention is described using an exemplary embodiment in two figures. show:

• 1 an inventive, multilayer security tape before an initial opening,
• 2 the security tape in 1 after an initial opening,
• 3 a plan view of a remnant of the opened security adhesive tape remaining on one surface 2 .

The security adhesive tape 50 according to the invention has a multilayer structure. First of all, the adhesive security tape 50 has a carrier layer 1, the carrier layer 1 is designed here as a thermoplastic film based on polyethylene terephthalate (PET), polypropylene (PP) or polyvinyl chloride (PVC).

The carrier layer 1 has a bottom 11 and a top 12; the upper side 12 faces away from a surface to be bonded, the underside 11 points towards the surface to be bonded. A functional layer 61 , 62 in the form of two strips running in a longitudinal direction L is applied along the underside 11 .

The two strips of the functional layer 61, 62 are each only partially filled with the functional layer material of the functional layer in such a way that a sequence of letters, a character string, a logo, an image or some other motif is formed in and through the functional layer. Due to the only partial order, the functional layer 61, 62 itself has many holes.

A first colored layer 2 is continuously applied over the underside 11 and the functional layers 61 , 62 . In order to be able to wind the security tape 50 onto itself, the upper side 12 is coated with a release coating, preferably based on silicone. UV-curing silicone systems on a 100% basis are suitable as the release coating, but solvent-containing silicone systems can also be used as the release coating for the adhesive security tapes 50 according to the invention.

The application quantity of the first color layer 2 is preferably 1 to 10 g/m², the first color layer 2 is colored because colors significantly increase the security effect with regard to the unnoticed opening of the packaging. For example, water-based, solvent-based or UV-curing printing or coating inks are conceivable for use as the first ink layer 2 , preferably in the production of the adhesive security tape 50 . Such color layers 2 are strong in color and suitable for being applied using a wide variety of technologies. The same applies to the second color layer 41, 42.

Away from the backing layer 1, an adhesive layer 3 is applied along the first colored layer 2; the layer of adhesive 3 is also applied continuously, specifically partly to the first colored layer 2 and partly to the second colored layer 41, 42.

The layer of adhesive 3 can essentially be any known adhesive with a high release force. The layer of adhesive 3 can consist of an adhesive based on solvent-containing natural rubber, synthetic rubber and acrylate adhesives, preference being given to adhesives based on acrylate dispersions. These adhesive mass technologies are used in the adhesive tape industry. The application rate of the layer of adhesive 3 is preferably 15 to 60 g/m²; in a further preferred embodiment, the layer of adhesive 3 is produced with an application of 20 to 30 g/m².

The second color layer 41, 42 is applied in predetermined areas between the first color layer 2 and the layer of adhesive 3, but it does not extend continuously along the first color layer 2, but rather in the present example along two spaced strips in the longitudinal direction L of the adhesive security tape 50 between the first colored layer 2 and the layer of adhesive 3, with the two strips of the second colored layer 41, 42 being at a constant distance from one another over the entire length of the adhesive security tape 50, and the two strips of the second colored layer 41, 42 being separated from their respective adjacent side edges 51, 52 of the security adhesive tape also each have a constant spacing over the entire longitudinal extent of the adhesive security tape 50.

A functional layer 61, 62, also applied in strips, interacts with the second colored layer 41, 42 applied in strips. The functional layer 61, 62 is applied between the carrier layer 1 and the first colored layer 2 in this exemplary embodiment. The first colored layer 2 covers the two functional layers 61, 62 evenly. The underside 11 of the carrier layer 1 is flat. A height H of the first colored layer 2 and in the predetermined areas the height H of the first colored layer 2 and the covered functional layer 61, 62 are the same everywhere along the longitudinal direction L and along a width B of the adhesive security tape 50. An underside 13 of the first color layer 2 is also shaped flat before it is torn open. The first color layer 2 is thinner in areas that extend along the longitudinal direction L and the width B, in which the functional layer 61, 62 is present. The first color layer 2 is thinner in these areas along the height H by the height of the functional layer 61, 62 than in areas in which no functional layer 61, 62 is provided.

Correspondingly, the layer of adhesive 3 is thinner in regions which extend along the longitudinal direction L and the width B and in which the second colored layer 41, 42 is present. The layer of adhesive is thinner in these areas along the height H by the height of the second colored layer 41, 42 than in areas in which no second colored layer 41, 42 is provided.

An underside 14 of the adhesive layer 3, which is intended for contact with the surface to be bonded (not shown), is in turn formed flat.

The two strips of the second color layer 41, 42 are each along the longitudinal direction L of the same width and height. The two strips of the release force-controlling functional layer 61, 62 also have the same height and width along the longitudinal direction L, being structured as a sequence of letters, a character string, a logo, an image or some other motif. However, the strips of the second color layer 41, 42 are each wider than the strips of the release force-controlling functional layer 61, 62 assigned to them.

The in the 1 and 2 The cross section shown shows areas of the adhesive security tape 50 in which the functional layer 61, 62 is actually present and has functional layer material. In contrast, no functional layer material is present in other cross sections that are not shown. For the sake of simplicity, it is also stated below that there is no functional layer 61, 62 present.

The functional layer 61, 62 controls the release force. The separating force of the functional layer 61, 62 on the carrier layer 1 and the separating force of the first color layer 2 on the functional layer 61, 62 are dimensioned such that when the carrier layer 1 is pulled off the adhesive security tape 50 a tearing behavior according to 2 arises.

In the areas in which there is no functional layer 61, 62, a tearing behavior analogous to that occurs 2 , However, a separation between the first color layer 2 and the second color layer 41, 42 takes place. Otherwise, the tearing behavior corresponds to that in 2 . The difference in the two tearing behavior with and without functional layer 61, 62 is that on the remainder of the adhesive security tape 50 on the surface to be bonded, in which in 2 illustrated case with functional layer 61, 62, the first color layer 2 can be seen, which corresponds in shape to the functional layer 61, 62, ie the motifs, words, letters, characters or similar. or trains their general partners. In the second case, not shown, when there is no functional layer 61, 62, the first color layer 2 is torn off with the carrier layer 1 and the part remaining on the surface to be bonded is covered by the second color layer 41, 42, which creates a different color impression becomes.

A separating force between the first color layer 2 and the functional layer 61, 62 is less than a separating force between the second color layer 41, 42 and the first color layer 2, and also less than a separating force between the adhesive layer 3 and the second color layer 41, 42. The The separation force between the first color layer 2 and the functional layer 61, 62 is also lower than the separation force between the functional layer 61, 62 and the backing layer 1. When the backing layer 1 is pulled off, the area of the security adhesive tape 50 that separates the two color layers 2 and 41, 42 has, between the first color layer 2 and the functional layer 61, 62.

In areas where there is no functional layer 61, 62, a separating force between the first color layer 2 and the second color layer 41, 42 is smaller than between the second color layer 41, 42 and the adhesive layer 3 and also smaller than between the first color layer 2 and the carrier layer 1. In these areas, the security adhesive tape 50 tears between the first color layer 2 and the second color layer 41, 42.

The area or areas that have both the first color layer 2 and the second color layer 41, 42 and the functional layer 61, 62 that sticks to the carrier layer 1 when it tears open form the area of the actual tamper evidence. After the initial opening, the in 2 illustrated opened security adhesive tape 50. If this opened security adhesive tape 50 is pressed shut again, however, the layer position according to FIG 1 , since air inclusions always remain between the first color layer 2 and the functional layer 61, 62, which change the refraction behavior of the light and thus produce a different optical impression when viewed from the outside. For example, the word "open" can be read. The areas that only have a first color layer 2, in 2 ie the two edge sections seen in the longitudinal direction L and the central section do not include any proof of first opening, but correspond to the tearing behavior of a conventional adhesive tape.

Both the carrier layer 1 and the functional layer 61, 62 are usually for light designed to be transparent, so that when viewing the adhesive security tape 50 stuck to a box through the carrier layer 1, the viewer gets the impression of a homogeneous coloring, the color corresponds to the color of the first colored layer 2. After the carrier layer 1 has been torn off, the first ones remain on the cardboard surface and second areas 53, 54, the parts of the first color layer 2 and first strips of the second color layer 41 and second strips of the second color layer 42. The two-dimensional design of the second color layer 41, 42 or the functional layer 61, 62 is along the longitudinal extent and width of the security tape 50 matched to each other, preferably formed the same. They can represent lettering or the like in the two-dimensional plane of the adhesive security tape 50 .

After a tear-off piece 55 has been torn off, lettering such as “opened” or the like is formed on the surface of the cardboard due to the first and second areas 53, 54 remaining adhesive. An example of this is in 3 shown.

In 3 the remainder of the opened security adhesive tape 50, ie the two regions 53, 54 extending in the longitudinal direction L, is shown on the surface to be glued, in particular the two flaps of a box. in the in 3 In the example shown, the first color with which the first color layer 2 is colored is black, while the second color with which the second color layer 41, 42 is colored is gray. A part of the security tape 50 torn from the surface is in FIG 3 no longer shown. In the areas where in the 3 the first color black can be seen, the functional layer 61, 62 is present on the torn-off security adhesive tape residue. There is no functional layer 61, 62 in the areas in which the second color gray can be seen.

Even after the tear-off piece 55 is pressed again onto the first and second areas 53, 54 remaining on the cardboard, air pockets remain between the first color layer 2 and the functional layer 61, 62, which change the refraction behavior of the light compared to the unopened security adhesive tape 50, so that after the Re-closing the security tape 50 the lettering "opened" remains legible.

The security tape 50 in 1 and in 2 is dimensioned such that a distance between the first strip of the second color layer 41 and the second strip of the second color layer 42 has about 6 to 10 mm. This makes it possible to stick the safety adhesive tape 50 over the two flaps of a cardboard box folded towards one another, a central longitudinal strip being arranged over the air gap formed between the two cardboard flaps.

The two side edge strips of the adhesive security tape 50 then each run along a flap of the cardboard box. The security tape 50 according to the invention has the advantage that when the two tabs of a cardboard box are being glued together after the carrier has been pulled off, there is no connection between the two remnants of security tape remaining on the cardboard flaps and therefore no parts of the security tape can fall into the cardboard box. In addition, there is the advantage that the adhesive mass arranged over the gap in the bonded state can stick to objects located in the cardboard box, but the separating force is so low that the adhesive mass layer 3 with the backing layer 1 is pulled off over the gap between the cardboard flaps.

reference list

1

backing layer

2

first layer of paint

3

adhesive layer

11

bottom

12

top

13

bottom

14

bottom

41

first strip of the second layer of paint

42

second strip of the second layer of paint

50

security tape

51

side edge

52

side edge

53

first area

54

second area

55

tear-off piece

61

functional layer

62

functional layer

L

longitudinal direction

H

Height

B

Broad

Claims (11)

Multi-layer adhesive security tape (50) with a backing layer (1) and a continuous applied first colored layer (2), a second colored layer (41, 42) applied in certain areas and a functional layer (61, 62) applied in certain areas which controls the release force and a layer (3) of adhesive composition applied continuously, the functional layer (61, 62) which controls the release force being between the carrier layer ( 1) and the second colored layer (41, 42), characterized in that boundaries of the functional layer (61, 62) are provided within boundaries of the second colored layer (41, 42), and in that the functional layer (61, 62) and the second color layer (41, 42) are each in the form of at least two longitudinal stripes that extend in the longitudinal direction (L) of the adhesive security tape (50), and wherein the outer shape of the second color layer (41, 42) and the release force-controlling functional layer (61, 62) are coordinated. Multi-layer security tape (50) according to claim 1 , characterized in that areas in which the second color layer (41, 42) is applied, allow a first opening evidence. Multi-layer security tape (50) according to claim 1 or 2 , characterized in that the second color layer (41, 42) is formed in the form of at least two strips which extend in a longitudinal direction (L) of the adhesive security tape (50) and are spaced apart from one another along the width. Multi-layer security tape (50) according to claim 3 , characterized in that the at least two strips are spaced apart from side edges (51, 52) along the longitudinal direction (L). Multi-layer adhesive security tape (50) according to any one of claims 3 or 4 , characterized in that a space between the two strips has a width of 6-10 mm. Multilayer adhesive security tape (50) according to one of the preceding claims, characterized in that the layer of adhesive (3) and the second colored layer (41, 42) are colored the same color. Multilayer adhesive security tape (50) according to one of the preceding claims, characterized in that a separating force between the functional layer (61, 62) and the first color layer (2) is smaller than a separating force between the first color layer (2) and the second color layer (41 , 42). Multilayer security adhesive tape (50) according to one of the preceding claims, characterized in that the separating force between the functional layer (61, 62) and the first colored layer (2) is smaller than a separating force between the carrier layer (1) and the first colored layer (2) and as a separating force between the first color layer (2) and the adhesive layer (3) and as a separating force between the functional layer (61, 62) and the backing layer (1). Multilayer adhesive security tape (50) according to one of the preceding claims, characterized in that the separating force between the functional layer (61, 62) and the first colored layer (2) is smaller than all other separating forces between directly adjacent layers. Multilayer security adhesive tape according to one of the preceding claims, characterized in that the separating force between the first colored layer (2) and the second colored layer (41, 42) is smaller than a separating force between the second colored layer (41, 42) and the layer of adhesive (3) and as the separation force between the first color layer (2) and the backing layer (1). Multilayer adhesive security tape (50) according to any one of the preceding claims, characterized in that the separation force in an area in which no functional layer (61, 62) is applied is smaller between the first color layer (2) and the second color layer (41, 42). is than all other separating forces between immediately adjacent layers in the range.

Images