DE102015015289A1 - security tape - Google Patents

Abstract

The invention relates to a multilayer security adhesive tape (50) having a carrier layer (1) and a first color coat (2) applied continuously, a second color coat (41, 42) applied in regions, and a partially applied release force controlling functional layer (61, 62) and a continuous applied coat Adhesive layer (3), wherein the separating force-controlling functional layer (61, 62) between the support layer (1) and the second ink layer (41, 42) is arranged.

Description

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

In the prior art, a plurality of multi-layer adhesive articles for Erstöffnungsnachweis with different layer structures is known.

In the DE 10 2008 030 935 A1 is a layer structure with the so-called tamper-evident effect with two full-surface applied layers of paint with an intermediate, not full-surface applied adhesion-controlling functional layer, which is also called labeling layer, described. The adhesion-controlling functional layer locally influences the force required to separate the two color layers, the release force, and leads to a defined area-wise separation by displaying a logo or lettering that is used for the first-hole detection.

A similar principle is both from the US 5,633,058 known as well as from the DE 199 63 709 A1 ,

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

However, disadvantages of the product structure for producing the tamper-evident effect are evident in the producibility, the machinability as well as in special application situations.

The problem with the above construction is the full-surface separation of the two color layers. Already the assembly of the security adhesive tape presents difficulties, since in a cutting or punching process, the easily separating ink layers are violated and, in many cases, brought to partial release. In addition, it can also after successful cutting by z. B. relaxation processes in the adhesive or transfer of the adhesive on the cutting edge of a tape to a partial separation of the layers come. This is especially for the mechanical application of the tape of disadvantage, since the separation at the cutting edges during unwinding residues on the top of the tape leaves; These lie on the guide rollers of the safety tape applicator and cause significant contamination, which leads to downtime due to cleaning.

Especially with the bonding of shipping cartons and their containers with a lid consisting of two tabs, the full-surface separation of colors is disadvantageous. Since the tabs of the carton always have a gap, there may be two different problems.

On the one hand, when the security adhesive tape is opened, a continuous layer of the lower color forms. This lower ink layer spans the gap of the tabs and can lead to the opening of the contamination of the interior of the package. In the process, particles or strips of the material fall into the packaging space and attach themselves to the interior material. This contamination is not desirable, especially for sensitive products such as pharmaceuticals.

On the other hand, during shipping with a larger gap of the tabs, the internal material can touch the packaging tape, this contact can lead to the partial separation of the layers and thus to the adhesion. The object of the invention is to provide a multi-layered security adhesive tape which reduces or even avoids the disadvantages mentioned.

The object is achieved by an aforementioned multilayer security adhesive tape having the features of claim 1. Preferred developments are subject of the dependent claims.

The multilayer security adhesive tape according to the invention has a carrier layer and a first color layer applied continuously, preferably on a lower side.

Under a band is generally understood here a structure having a longitudinal direction and a longitudinal extent, which is significantly larger, that is many times as large as a width of the band which is perpendicular to the longitudinal direction, and this width in turn is significantly larger, So many times as high as a height of the band, which is perpendicular to the longitudinal direction and the width of the band.

The carrier layer preferably extends over the entire length and width of the security adhesive tape. The carrier layer is preferably formed 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 a job which extends over the entire length and width of the security adhesive tape, but which may be arranged in different layers along the height of the security adhesive tape. A continuous order can be done in different areas along the length and Width of the security tape have different heights. However, it is preferably simply contiguous along the length and width.

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

Under a partially applied layer is a layer understood that is applied along the length and width of the security tape only in just these areas and is not otherwise applied. However, the partially applied layer is not applied continuously. The regions which are complementary to the regions are free of the layer applied in certain regions.

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

Conveniently, limits of the regions of the functional layer are provided within limits of the regions of the second color layer. The term border refers to the two-dimensional shape along the length and width of the security adhesive tape. Within the boundaries of the areas in which the functional layer and the second ink layer are applied, a first opening detection is formed.

The regionally applied functional layer forms motifs, words, letters, characters or the like. or complementary to motifs, words, letters, characters or the like out. The second color layer, however, is applied continuously within the boundaries of the areas. This causes a particularly favorable tearing behavior.

Under a partial application of the second color layer is understood here, for example, in a longitudinal direction of the security tape strip-like application, preferably the second color layer in the form of at least two, preferably exactly two longitudinal strips formed extending in the longitudinal direction of the security tape and along each other the entire longitudinal extent are uniformly spaced and each have a constant distance to an adjacent side edge of the security adhesive tape along the longitudinal direction.

The partially applied functional layer has motifs, words, letters, characters or the like. on. On the one hand, the functional layer, like the second color layer, is applied in regions, preferably in strip form, in at least two, preferably exactly two, strips extending in the longitudinal direction. On the other hand, the functional layer is applied only partially in the areas themselves. The partial order forms the motifs, words, letters, characters or the like. out. The second color layer, however, is continuous in the areas. Only the outer shape of the second color layer and the separating force-controlling functional layer are coordinated as discussed above.

The security adhesive tape is basically constructed in such a way that the areas of the security adhesive tape in which both two color layers and the functional layer are arranged one above the other allow a first opening detection, ie have a first-opening security feature, while the areas in which the second color layer is not applied, the Security adhesive tape preferably therefore only a first color layer and the adhesive layer has, correspond to a conventional adhesive tape without Erstöffnungsnachweis, which can be completely removed after sticking again, at best, the adhesive layer partially or completely or not at all remains on the pasted surface.

Particularly preferably, both two edge longitudinal strips and one center longitudinal strip of the security adhesive tape have no first opening detection, while the at least two strips, along which the second color layer is applied, comprise the first opening detection.

Advantageously, in the inventive design of the security adhesive tape, the edge longitudinal strips are formed so that the separation force between the individual layers of the security tape is high, and is so high that the security tape completely dissolves after peeling off the surface. In contrast, the separation force between the layers of the area with Erstöffnungsnachweis is dimensioned so that the security tape dissolves between two layers, preferably dissolves between the functional layer and the first color layer, so that after peeling off the carrier layer parts of the security adhesive tape remain on the surface to be bonded; they have the function of the first opening certificate.

The security adhesive tape is used in particular for bonding tabs of cardboard boxes, which have a gap between the tabs when folding. Between the sticky Security adhesive tape parts, however, after the opening no connection, so it can not fall through security tape parts, especially color layer parts in the package or through the gap in the carton.

Conveniently, the adhesive layer and the second color layer are colored in the same color. As a result, when the security adhesive tape is viewed through the preferably transparent carrier layer, the second color layer is not recognized, and the viewer only sees the first color layer as a homogeneous color layer extending over the entire security adhesive tape, so that from outside the subdivision into areas with first opening detection and in Areas without first opening evidence is not possible.

A separating force between the functional layer and the first color layer is favorably smaller than a separating force between the first color layer and the second color layer. As a result, the security adhesive tape between the functional layer and the first color layer is opened.

Preferably, the release force between the functional layer and the first color layer is less than a release force between the carrier layer and the first color layer and as a release force between the first color layer and the adhesive layer and as a release force between the functional layer and the carrier layer. In this separation force setting remain after opening the security tape on one side of the separating force controlling functional layer on the support layer and on the other side, the first and second ink layer on the adhesive layer and thus on the surface to be bonded.

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

In particular, in areas where the layer sequence does not have a separating force-controlling functional layer, the separating force between the first color layer and the second color layer is smaller than a separating force between the second color layer and the adhesive layer and also smaller than the separating force between the first color layer and the carrier layer. As a result, after opening, the second color layer remains on the adhesive layer and the first color layer on the carrier layer.

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

Overall, the security tape separates when tearing in areas where a functional layer is present between the functional layer and the first color layer and in areas where no functional layer is present between the first and second color layer.

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 remaining safety adhesive tape residues on the surface, without the functional layer itself being visible there.

The release force between the individual layers is often referred to as adhesion or adhesion.

The first color layer preferably covers the two functional layers and the carrier layer flat. A height of the first color layer and in the predetermined areas a height of the first color layer plus the overlaid functional layer are the same everywhere along the longitudinal direction and along the width of the security adhesive tape. The first color layer is preferably coated on the carrier layer and the functional layer. An underside of the first color layer is thus formed just before tearing. The first color layer is thinner in this embodiment along the longitudinal direction and the width-extending regions in which the functional layer is present. The first color 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 adhesive layer is thinner in the longitudinal direction and width-extending regions in which the second color layer is present. However, it is also conceivable that the adhesive layer still has a constant height along the width of the security adhesive tape. In particular, the regions which are not filled by the second color in a layer plane of the second color layer can be filled otherwise. The adhesive layer is in these areas along the height of the height of the second Color layer thinner than in areas where no second color layer is provided.

In other embodiments of the invention, the first color layer is printed on the carrier layer and the functional layer. In a printing process, the first color layer is given the same height along its entire extent in the longitudinal direction and along the width of the security adhesive tape. The bottom of the first color layer is then no longer flat, but it takes over the profile of the carrier layer and applied to the carrier layer functional layer.

The invention will be described with reference to an embodiment in two figures. Showing:

1 a multilayer security adhesive tape according to the invention before a first opening,

2 the safety tape in 1 after a first opening,

3 a plan view of a remaining on a surface remainder of the opened security tape in 2 ,

The security adhesive tape according to the invention 50 is multi-layered. First, the security tape has 50 a carrier layer 1 on, 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 on; the top 12 is facing away from a sticky surface, the bottom 11 indicates the sticky surface. Along the bottom 11 is a functional layer 61 . 62 in the form of two along a longitudinal direction L extending strip applied.

The two strips of the functional layer 61 . 62 each are only partially filled by the functional layer material of the functional layer, in such a way that a letter sequence, a string, a logo, an image or any other motif are formed in and through the functional layer. Due to the only partial order is the functional layer 61 . 62 even very punctured.

About the bottom 11 and functional layers 61 . 62 is a first color layer 2 applied continuously. To the security tape 50 being able to wind on itself is the top 12 coated with a release coating, preferably based on silicone. Suitable as a release coating are UV-curing silicone systems based on 100%, but also can solvent-containing silicone systems as a release coating for security tapes according to the invention 50 be used.

The order quantity of the first color coat 2 is preferably 1 to 10 g / qm, the first color coat 2 is colored because colors significantly increase the safety effect of unnoticed opening of the packaging. Preferably in the manufacture of the security adhesive tape 50 For example, water-based, solvent-based, or UV-curable printing or coating inks are for use as the first color layer 2 conceivable. Such color layers 2 are strong in color and suitable to be applied with a variety of technologies. The same applies to the second color layer 41 . 42 ,

The carrier layer 1 is turned away along the first color layer 2 an adhesive layer 3 applied; the adhesive layer 3 is also applied throughout, in part to the first color coat 2 and partly on the second color coat 41 . 42 ,

At the adhesive layer 3 it may essentially be all known adhesives with high release power. The adhesive layer 3 may consist of an adhesive based on solvent-containing natural rubber, synthetic rubber and acrylate adhesives, preference is given to adhesives based on acrylate dispersions. These adhesive technologies are used in the adhesive tape industry. The application rate of the adhesive layer 3 is preferably 15 to 60 g / qm, in another preferred embodiment, the adhesive layer 3 made with an order of 20 to 30 gsm.

Between the first coat of paint 2 and the adhesive layer 3 is the second color layer in predetermined areas 41 . 42 but not continuous along the first coat of paint 2 extends, but in the present example along two spaced-apart strips in the longitudinal direction L of the security adhesive tape 50 between the first color layer 2 and the adhesive layer 3 is arranged, wherein the two strips of the second color layer 41 . 42 over the entire longitudinal extent of the security adhesive tape 50 have a constant distance from each other and the two strips of the second color layer 41 . 42 from their respective adjacent security tape side edges 51 . 52 also in each case a constant distance over the entire longitudinal extent of the security adhesive tape 50 exhibit.

With the strip-like applied second color layer 41 . 42 one also works stripe-applied functional layer 61 . 62 together. The functional layer 61 . 62 is in this embodiment between the carrier layer 1 and the first color coat 2 applied. The first color layer 2 covers the two functional layers 61 . 62 just off. The bottom 11 the carrier layer 1 is just trained. A height H of the first color layer 2 and in the predetermined areas, the height H of the first color layer 2 and the covered functional layer 61 . 62 are along the longitudinal direction L and along a width B of the security adhesive tape 50 the same everywhere. A bottom 13 the first color layer 2 is also just formed before tearing. The first color layer 2 is in itself along the longitudinal direction L and the width B extending areas in which the functional layer 61 . 62 is present, thinner. The first color layer 2 is in these areas along the height H by the height of the functional layer 61 . 62 Thinner than in areas where no functional layer 61 . 62 is provided.

Accordingly, the adhesive layer 3 in extending along the longitudinal direction L and the width B areas in which the second color layer 41 . 42 is present, thinner. The adhesive layer is in these areas along the height H by the height of the second color layer 41 . 42 Thinner than in areas where no second coat of paint 41 . 42 is provided.

A bottom 14 the adhesive layer 3 , which is intended for contact with the surface to be pasted (not shown) is in turn just formed.

The two strips of the second color layer 41 . 42 are each along the longitudinal direction L consistently wide and consistently high. The two stripes of the separation force-controlling functional layer 61 . 62 are also along the longitudinal direction L also consistently high and consistently wide, where they are structured as a string of letters, string, logo, image or other motive. The stripes of the second color coat 41 . 42 but are each wider than their assigned stripes of the separation force-controlling functional layer 61 . 62 ,

The in the 1 and 2 illustrated cross-section shows areas of security tape 50 in which the functional layer 61 . 62 actually exists and has functional layer material. In contrast, in other sections, not shown, no functional layer material is present. Furthermore, for the sake of simplicity, it is also said that there is no functional layer 61 . 62 is available.

The functional layer 61 . 62 is separating force controlling. The separation force of the functional layer 61 . 62 on the carrier layer 1 and the release force of the first color layer 2 at the functional layer 61 . 62 are dimensioned so that when removing the carrier layer 1 from the security tape stuck to a surface such as a cardboard or the like 50 a tearing behavior according to 2 arises.

In areas where no functional layer 61 . 62 is present, a tear occurs in analogy to 2 but with a separation between the first color layer 2 and the second color layer 41 . 42 takes place. Otherwise, the tearing behavior is the same as in 2 , The difference in the two tearing behavior with and without functional layer 61 . 62 is therefore that on the remaining on the surface to be stuck remaining security tape 50 in which 2 illustrated case with functional layer 61 . 62 , the first color coat 2 it can be seen in the form of the functional layer 61 . 62 corresponds, so the motives, words, letters, characters o. Ä. or their complementaries. In the second case, not shown, if no functional layer 61 . 62 is present, becomes the first color coat 2 with the carrier layer 1 torn off and the remaining on the surface to be stuck part is through the second layer of paint 41 . 42 covered, whereby a different color impression is awakened.

A release force between the first color layer 2 and the functional layer 61 . 62 is less than a separation force between the second color layer 41 . 42 and the first color coat 2 , and also less than a release force between the adhesive layer 3 and the second color layer 41 . 42 , 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 carrier layer 1 , By peeling off the carrier layer 1 the area of security tape rips 50 , the two color layers 2 and 41 . 42 between the first color layer 2 and the functional layer 61 . 62 on.

In areas where no functional layer 61 . 62 is present, is a separation force between the first color layer 2 and the second color layer 41 . 42 on the one hand smaller than between the second color layer 41 . 42 and the adhesive layer 3 and on the other hand also smaller than between the first color layer 2 and the carrier layer 1 , In these areas the security tape breaks 50 that is, between the first color layer 2 and the second color layer 41 . 42 on.

The area or areas that are both the first color layer 2 as well as the second color layer 41 . 42 and on the carrier layer 1 when tearing stuck functional layer 61 . 62 have, form the area of the actual Erstöffnungsnachweises. After first opening, the in 2 illustrated opened security tape 50 , Should this open security tape 50 be closed again, but not the layer layer according to 1 because there are always air pockets between the first coat of paint 2 and the functional layer 61 . 62 remain existing, which change the refractive behavior of the light and thus produce a, seen from the outside, other visual impression. For example, the word "open" should be read. The areas that only have a first coat of paint 2 have, in 2 Thus, the two seen in the longitudinal direction L edge portions and the central portion, do not include Erstöffnungsnachweis, but correspond to the Abreißverhalten a conventional adhesive tape.

Both the carrier layer 1 as well as the functional layer 61 . 62 are usually transparent to light, so that when viewing the glued onto a cardboard security tape 50 through the carrier layer 1 the impression of a homogeneous coloring is awakened in the viewer, the color corresponds to the color of the first color layer 2 , After tearing off the carrier layer 1 remain on the cardboard surface first and second areas 53 . 54 , the parts of the first color coat 2 and first stripes of the second color coat 41 and second stripes of the second color coat 42 , Here are the second color layer 41 . 42 or the functional layer 61 . 62 in its two-dimensional design along the longitudinal extent and width of the security tape 50 matched, preferably the same design. You can use a lettering or similar in the two-dimensional plane of the security tape 50 represent.

After tearing off a piece of demolition 55 Form on the board surface through the sticky first and second areas 53 . 54 Lettering such as "open" or similar. An example of this is in 3 shown.

In 3 is the remaining on the surface to be stuck, in particular the two tabs of a carton, the rest of the opened security tape 50 , So the two extending in the longitudinal direction L areas 53 . 54 represented. In the in 3 The example shown is the first color with which the first color layer 2 is colored, black, while the second color, with the second color coat 41 . 42 is colored, gray is. A part of the security tape that has been torn off the surface 50 is in the 3 not shown anymore. In the areas where in the 3 the first color black can be recognized is the functional layer 61 . 62 present at the demolished security tape remainder. In areas where the second color is gray, there is no functional layer 61 . 62 available.

Even after re-pressing the demolition piece 55 on the remaining on the box first and second areas 53 . 54 Air bubbles remain between the first coat of paint 2 and the functional layer 61 . 62 , the refractive behavior of the light compared to the unopened security tape 50 change, so after resealing 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 strips of the second color layer 41 and the second stripe of the second color layer 42 about 6 to 10 mm. This makes it possible to use the security tape 50 to glue over the folded two tabs of a cardboard box, wherein a central longitudinal strip is arranged above the air gap forming between the two cardboard cartons.

The two side edge strips of the security adhesive tape 50 then run along each one tab of the cardboard box. The security adhesive tape according to the invention 50 has the advantage that in the discussed bonding of the two tabs of a cardboard box after removal of the carrier between the two remaining on the cardboard tabs Sicherheitsklebebandresten remains no connection and thus can not fall into the cardboard box no parts of the security tape. In addition, there is the advantage that the adhesive material arranged above the gap in the bonded state can bond with objects located in the cardboard, but the release force is so low that the adhesive layer 3 with the carrier layer 1 is peeled off over the gap between the cardboard tabs.

LIST OF REFERENCE NUMBERS

1

backing

2

first color layer

3

adhesive film

11

bottom

12

top

13

bottom

14

bottom

41

first strip of the second color layer

42

second strip of the second color layer

50

security tape

51

side edge

52

side edge

53

first area

54

second area

55

demolition piece

61

functional layer

62

functional layer

L

longitudinal direction

H

height

B

width

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102008030935 A1 [0003]
• US 5633058 [0004]
• DE 19963709 A1 [0004]

Claims (12)

Multilayered security adhesive tape ( 50 ) with a carrier layer ( 1 ) and a continuously applied first color layer ( 2 ), a partially applied second color layer ( 41 . 42 ) and a partially applied separation force-controlling functional layer ( 61 . 62 ) and a continuously applied adhesive layer ( 3 ), wherein the separation-controlling functional layer ( 61 . 62 ) between the carrier layer ( 1 ) and the second color layer ( 41 . 42 ) is arranged. Multilayered security adhesive tape ( 50 ) according to claim 1, characterized in that boundaries of the functional layer ( 61 . 62 within limits of the second color layer ( 41 . 42 ) are provided. Multilayered security adhesive tape ( 50 ) according to claim 1 or 2, characterized in that areas in which the second color layer ( 41 . 42 ), allow a Erstöffnungsnachweis. Multilayered security adhesive tape ( 50 ) according to claim 1, 2 or 3, characterized in that the second color layer ( 41 . 42 ) in the form of at least two in a longitudinal direction (L) of the security adhesive tape ( 50 ) extending, spaced along the width of the strip is formed. Multilayered security adhesive tape ( 50 ) according to claim 4, characterized in that the at least two strips along the longitudinal direction (L) of side edges ( 51 . 52 ) are spaced. Multilayered security adhesive tape ( 50 ) according to one of claims 4 or 5, characterized in that a distance between the two strips has a width of 6-10 mm. Multilayered security adhesive tape ( 50 ) according to one of the preceding claims, characterized in that the adhesive layer ( 3 ) and the second color layer ( 41 . 42 ) are colored in the same color. Multilayered security adhesive 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 separation force between the first color layer ( 2 ) and the second color layer ( 41 . 42 ). Multilayered 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 color layer ( 2 ) is less than a release force between the carrier layer ( 1 ) and the first color layer ( 2 ) and as a release 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 carrier layer ( 1 ). Multilayered 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 color layer ( 2 ) is smaller than all other separation forces between immediately adjacent layers. Multilayer security adhesive tape according to one of the preceding claims, characterized in that the release force between the first color layer ( 2 ) and the second color layer ( 41 . 42 ) is smaller than a separation force between the second color layer ( 41 . 42 ) and the adhesive layer ( 3 ) and as the separation force between the first color layer ( 2 ) and the carrier layer ( 1 ). Multilayered security adhesive tape ( 50 ) according to one of the preceding claims, characterized in that the separation force in a region in which no functional layer ( 61 . 62 ) is applied, between the first color layer ( 2 ) and the second color layer ( 41 . 42 ) is smaller than all other separation forces between immediately adjacent layers in the region.

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