EP3343539A1 - Foil structure with tamper protection - Google Patents

Abstract

A film structure with tamper protection comprises a void layer (100) for inducing a void effect and a cover layer (200) disposed in the film structure (1) over the void layer (100). The film structure further comprises a pattern layer (400) for forming a pattern. The pattern layer (400) is disposed in the film structure (1) under the void layer (100). The pattern layer (400) is formed such that the pattern included in the pattern layer (400) has at least one screened area (410).

Description

The following is a film structure with tamper protection based on a void effect specified.

For identification purposes, film structures in the form of labels or badges are usually adhered to articles to be marked. In order to detect possible manipulations on a label or a sticker, the film structure may be provided with a tamper-evident protection. In the case of a film structure with a void effect, part of the marking remains on the substrate during the detachment of the film structure from one object, while another part of the marking sticks to the detached film layer. Thus, the label and thus the typeface is destroyed.

Due to the destroyed typeface, the manipulation should be visually recognizable. However, counterfeiters often succeed in sticking back the detached film layer with the adhering marking fragments to the layers remaining on the substrate in such a way that the detached identification sections reassemble very accurately with the identification fragments remaining on the substrate. The manipulation carried out on the film structure is thus not recognizable, at least at first sight.

A concern of the present invention is to provide a film structure with protection against tampering, in which a void effect occurs when trying to replace the film structure of a substrate of an object and the detached layers of the film structure with the remaining on the ground layers of the Assemble the film structure in such a way that the triggered void effect is no longer recognizable.

A tamper-resistant film based on a void effect, where the triggered void effect is restored after attempting to replace the detached foil layer is sticking back to the substrate of an object remaining layers of the film structure, is still recognizable, is specified in claim 1.

The tamper-resistant film construction includes a void layer for inducing a void effect and a cover layer disposed over the void layer in the film structure. The cover layer is formed for example by a film layer. The film structure further comprises a pattern layer for forming a pattern, wherein the pattern layer is disposed below the void layer. The pattern layer is formed such that the pattern included in the pattern layer has at least one screened area.

The pattern layer corresponds to a layer in which a grid, for example in the form of spaced-apart points, that is a dot pattern, is included. Furthermore, in addition to the screened area, another structure, for example a guilloche or another image motif, can be integrated into the pattern layer.

At least one information layer may be arranged between the void layer and the pattern layer. The at least one information layer may comprise a layer that has as an identifier, for example, a label in the form of letters or numbers or an image motif.

The void layer may have at least a first region in which a release lacquer is present, and at least a second region, in which no release lacquer is present. The first and the second area border each other directly. In the second region of the void layer, in which no release lacquer is present, the cover layer adheres directly to the underlying layer, for example, the at least one information layer / layer or directly on the pattern layer.

In the film structure, a background color layer may be disposed immediately under the pattern layer. The background color layer may be formed, for example, as a full-surface color layer, for example as a white or gray color layer. In particular, the background color layer can be applied over the entire surface. To stick of the film structure 1 on the background of an object, an adhesive layer is arranged below the background color layer. The background color layer may in particular be arranged between the pattern layer and the adhesive layer.

Due to the release varnish partially present in the void layer, a void effect is triggered in an attempt to remove the film structure adhered to a substrate. At those areas of the film structure at which the void effect occurs, the top or cover film separates from one or more of the underlying layers of the cover. Due to the segmentation of the void layer, those parts of the information layers arranged under the regions of the void layer with the release varnish adhere to the underlying layers of the film structure. This means that these parts of the information layers will continue to adhere to the ground. Other parts of the information layers that are not located under the areas of the void layer with the release varnish adhere to the cover film and are lifted off together with the cover film.

Due to the combination of the screened area of the pattern layer and the underlying background layer, which acts as a deposited effect area, an optical light trap is reduced at those areas of the film structure where separation of the layers from the cover film has taken place. As a result, those regions of the cover film that have been separated from the information layer during peeling back when glueing the cover on the remaining on the ground part of the film structure brighter than the unrelieved areas, that are those areas of the cover, on the parts of the information layer at Peeling off the cover have remained stuck. An optical recognition of a manipulation is thereby significantly increased. It can thus be achieved with the same number of colors in a printing machine better visual recognition.

It should be noted that void effects in film structures can in principle also be realized with solid colors (envelope in transparent). With spot colors, the contrast is not immediately obvious after the triggering of a void effect and the attempt to reassemble the film layers, especially in glossy carrier foils. because a glossy foil and the triggered area are not ideally contrast-rich, because only a surface separation has taken place and not the triggering area has been changed. For example, only the adhesive applied under the background layer contracts when pulled off the substrate, but the geometry of the remaining identification fragments on the substrate does not change.

Another way to realize a void effect in a film construction is to use a multicolor structure. In a multi-color construction, for example, the background appears in the color purple. When the film structure is removed from a substrate, a hidden text appears in red text color, while the blue color component of the original mixed color is used to lilac on the substrate or to move away. The disadvantage is that in a multi-color construction always a mixed color, which may have optical differences arises. In addition, such a film structure requires a structurally complex layer structure. Frequently, this layer structure is not compatible with an existing machine park on whose machines the film structure is to be produced.

In a likewise frequently used film structure with a transparent void effect, a matt film is used. When a label with such a film structure is removed from the substrate, the contrast at the point where the void has exhibited a release coating and an information layer has lifted from the cover layer is optically true after reassembling the film layers as a duller area. The disadvantage here is that in many products to be marked no matt film can be used, since thereby the color impression is changed and this is not desired by customers or applications.

According to the film structure according to the invention, there is no full-surface ink layer below the void layer or below the at least one information layer. Instead, the pattern layer has at least one screened area. The screened area can be designed in such a way that individual color dots are arranged at a specific dot pitch, whereby no color is present between the color dots.

If an attempt is made to peel off the adhered film structure from a substrate, a portion of the marking remains on the substrate at the locations where the void or release paint is present in the void layer. On the peeled cover layer / top film arise at the points where the void or release lacquer is present, transparent areas. If a counterfeiter attempts to stick the peeled cover / top film back onto the underlayers, an optical shift will result in the transparent areas of the top film. In the rasterized area of the pattern layer, this clearly identifies a motif / pattern that is deposited in the pattern layer.

• Figur 1 einen Querschnitt durch eine erste Ausführungsform eines Folienaufbaus mit Manipulationsschutz basierend auf einem Void-Effekt,
• Figur 2A eine Ausführungsform einer Void-Effekt-Schicht eines Folienaufbaus mit Manipulationsschutz,
• Figur 2B eine Ausführungsform mindestens einer Informationsschicht mit einer Kennzeichnung eines Folienaufbau mit Manipulationsschutz,
• Figur 2C eine Ausführungsform einer Musterschicht und einer Hintergrundfarbschicht eines Folienaufbaus mit Manipulationsschutz,
• Figur 3A eine Draufsicht auf einen Folienaufbau mit Manipulationsschutz vor dem Auslösen eines Void-Effekts,
• Figur 3B eine Draufsicht auf einen Folienaufbau mit Manipulationsschutz nach dem Auslösen eines Void-Effekts.

The invention will be explained in more detail below with reference to figures showing exemplary embodiments of the present invention. Show it:

• FIG. 1 a cross-section through a first embodiment of a film structure with tamper protection based on a void effect,
• FIG. 2A an embodiment of a void effect layer of a film structure with tamper protection,
• FIG. 2B an embodiment of at least one information layer with an identification of a film structure with manipulation protection,
• Figure 2C an embodiment of a pattern layer and a background color layer of a film structure with tamper protection,
• FIG. 3A a top view of a film structure with tamper protection before triggering a void effect,
• FIG. 3B a top view of a film structure with tamper protection after triggering a void effect.

FIG. 1 shows a first embodiment of a film structure 1 with tamper protection based on a void effect. The film structure comprises a void layer 100 for Triggering the void effect when trying to detach the glued-on foil structure from a surface of an object. The film structure further includes a cap layer 200 disposed over the void layer 100 in the film structure. The cover layer 200 may be formed, for example, as a transparent film. The cover layer 200 is embodied in the film structure in a plan view as the uppermost layer or film layer.

For gluing the film structure 1, the film structure on the underside an adhesive layer 300. The adhesive layer 300 is disposed in the film structure below, but not immediately below, the void layer 100. The adhesive layer 300 may be of an in FIG. 1 Be covered, not shown protective film (liner). Furthermore, the film structure 1 has a pattern layer 400 for forming a pattern. The pattern layer 400 is disposed below the void layer 100 and between the void layer 100 and the adhesive layer 300, respectively.

The actual marking, which has the film structure 1, is contained in at least one information layer 600a,..., 600n. The at least one information layer 600 is in the in FIG. 1 shown embodiment of the film structure immediately below the void layer 100 is arranged. The at least one information layer 600a,..., 600n is disposed between the void layer 100 and the pattern layer 400.

At least one color layer 610 is arranged in the at least one information layer 600a,..., 600n in such a way that a marking is produced in the at least one information layer 600a,..., 600n. By means of the ink layer 610 in the at least one information layer 600a,..., 600n, for example, in the film structure, a lettering in the form of numbers, letters or other characters or in the form of a picture motif can be realized.

For the sake of simplified illustration, the ink layer 610, for example a printing ink, is shown only in the information layer 600a. However, the marking can also be realized in the film structure 1 in that further color layers 610 are present in the further layers 600b,..., 600n lying below the information layer 600a, which together form the marking in the form of the lettering or the text Form picture motifs. Each of the information layers 600a, ..., 600n may be formed as a film layer, to each of which a color layer 610 is applied.

The pattern layer 400 is formed such that the pattern included in the pattern layer 400 has at least one screened area 410. The at least one screened area 410 of the pattern layer 400 may have a dot pattern in which dots are arranged at a dot pitch. For example, the points may be regularly spaced. When using an amplitude-modeled raster, the halftone dots are always at the same distance from center to center within a screen ruling. Instead, the size or shape of the grid points changes. For a 54 grid, 54 dots per cm are spaced 0.0185 cm (= 1/54 cm) apart. The screen ranged from 28 dots per cm in screen printing, corresponding to a distance of 0.0357 cm (= 1/28 cm), up to 200 dots per cm in offset printing, corresponding to a distance of 0.005 cm (= 1/200 cm). Another possibility is the use of a frequency-modeled raster, in which the raster points on a surface have the same point size but different distances.

In addition to the at least one screened area 410, the pattern layer 400 may have at least one further area 420 in which, for example, a guilloche is present as a pattern. In contrast to the screened area 410, the pattern contained in the area 420 is realized by a printed solid area. These are not individual points of a color, which are unconnected to each other, but to interconnected color points through which, for example, individual lines of guilloche are formed. The pattern layer 400 may have a layer on which the screened area 410 and optionally the guilloche 420 are applied, for example by a printing process.

The film structure 1 has a background color layer 500 below the pattern layer 400. The background color layer 500 is disposed between the pattern layer 400 and the adhesive layer 300. The background color layer 500 is provided in the film structure 1, particularly immediately under the pattern layer 400. The background color layer 500 may be formed as a full-color ink layer. The background color layer 500 may have a layer on which the background color, such as a white or gray color layer, is applied over the entire surface.

The void layer 100 has at least one first region 101, in which a void or release lacquer 110 is present. Furthermore, the void layer 100 has at least one second area 102 in which no void or release varnish is present. The at least one first region 101 of the void layer 100 directly adjoins the at least one second region 102 of the void layer 100.

As based on FIG. 1 1, the at least one screened area 410 of the pattern layer 400 is arranged in a vertical projection under at least one of the at least one first area 101 and below at least one of the at least one second area 102 of the void layer 100.

FIG. 2A shows the void layer 100 with the release coating 110, which is arranged as a void motif in the void layer 100. In the illustrated embodiment of the FIG. 2A the release varnish 110 is arranged in the form of interrupted circle segments (different radius) in the void layer 100.

FIG. 2B shows the at least one information layer 600a, ..., 600n. The at least one information layer has several layers in the illustrated embodiment in which color layers 610 are arranged such that, for example, the coat of arms contained in the center of the at least one information layer or the marginal inscription is formed as identification of the film structure.

Figure 2C FIG. 12 shows the pattern layer 400 arranged immediately below the at least one information layer 600a,..., 600n, with the screened area 410 and the guilloche area 420. The area 420 is configured as a full color screen. For example, the screened area 410 may include color dots that form a dot pattern. The screened area 410 may have black or gray color dots spaced apart from each other. Instead of a monochrome dot matrix, in particular in the case of a glossy film layer, a CYMK printing in the pattern layer can take place 400 can be used with combination with a white color background in the background color layer 500. The indicated embodiments of the screened area 410 are merely examples.

In an attempt to peel the film structure 1 after adhesion to a substrate of an object, remain the portions 601 of the at least one information layer 600a, ..., 600n, which under the at least one first portion 101 of the void layer, that is below Separating lacquer 110 are arranged to adhere to the substrate of the object when detaching the film structure of an object. The portions 602 of the at least one information layer 600a,... 600n, which are arranged below the second area 102 of the void layer 100, that is to say below the recessed area in which no release lacquer is present, remain when the foil structure is detached from adhere to the substrate of the object on the cover sheet 200.

The FIGS. 3A and 3B show a top view of the film structure 1. In the at least one information layer 600a, ..., 600n, the color layers 610 are arranged such that in the FIGS. 3A and 3B shown label, for example, the coat of arms shown in the left area is designed as a label. The screened area 410 of the pattern layer 400 is arranged below the at least one information layer 600a,..., 600n, that is to say in the region of the illustrated cross of the film structure. In the area to the right of the cross is a monochrome motif without grid included. The lines shown in this area are parts of a guilloche.

FIG. 3A shows the film structure in glued state before manipulation. FIG. 3B shows the film structure after a tampering, if has been tried, the previously lifted parts of the information layer, which have remained stuck due to the void effect on the cover layer, stick again to those parts of the information layer, which remained stuck to the lower film layers in the tampering attempt are.

Due to the combination of the screened area 410 of the pattern layer 400 and the deposited background color layer / effect area 500, when the film structure is opened reduced in the range of the void effect, an optical light capture, so that the triggered areas, that is, areas of the cover, where parts of the information layer have adhered to peel, appear after reassembling brighter than the unreleased areas. The void effect, here a circular arc, shows up in the cross area in FIG. 3B clearer than next to it in the monochrome gray area. The refraction of light makes the subject appear brighter. By deliberately depositing the grid surface 410 with a color-matched background color layer 500, which acts as a contrast surface, the optical recognition of the triggered void effect is significantly increased.

LIST OF REFERENCE NUMBERS

1

film structure

100

Void layer

110

release agent

200

covering

300

adhesive layer

400

pattern layer

410

Rasterized area of the pattern layer

420

Area of the pattern layer without screening

500

Background color layer

600a, ..., 600n

information layer

610

Color layer in the information layer

Claims (13)

Film construction with protection against tampering, comprising: a void layer (100) for triggering a void effect, a cover layer (200) disposed in the film structure (1) over the void layer (100), a pattern layer (400) for forming a pattern which is arranged in the film structure (1) under the void layer (100), - wherein the pattern layer (400) is formed such that the pattern contained in the pattern layer (400) has at least one gridded area (410). A film structure according to claim 1, comprising: a background color layer (500) disposed below the pattern layer (400). Foil structure according to claim 2,
wherein the background color layer (500) is formed as a full-surface color layer. Foil structure according to claim 3,
wherein the background color layer (500) is formed as a white color layer. Film structure according to one of claims 1 to 4, - wherein the void layer (100) has at least one first region (101), in which a release varnish (110) is present, and at least one second region (102), in which no release varnish is present, - wherein the at least one first region (101) of the void layer (100) directly adjacent to the at least one second region (102) of the void layer (100). Film structure according to claim 5,
wherein the at least one screened area (410) of the pattern layer (400) is disposed in a perpendicular projection under at least one of the at least one first area (101) and at least one of the at least one second area (102) of the void layer (100) , Film structure according to one of claims 1 to 6,
wherein the at least one screened region (410) of the pattern layer (400) has a dot pattern in which dots are arranged at a dot pitch. Film structure according to one of claims 1 to 7,
wherein the pattern layer (400) has, in addition to the at least one screened area (410), at least one further area (420) in which a guilloche is present as a pattern. A film structure according to any one of claims 1 to 8, comprising: at least one information layer (600a,..., 600n) in which a color layer (610) is arranged such that an identification is formed in the at least one information layer (600a,..., 600n), - Wherein the at least one information layer (600a, ..., 600n) between the void layer (100) and the pattern layer (400) is arranged. Film structure according to claim 9, - wherein the void layer (100) is formed such that first portions (601) of the at least one information layer (600a, ..., 600n) of the film structure (1) under the at least one first portion (101) of the Void Layer are arranged, when detaching the film structure (1) from the substrate of the object, to which the film structure (1) by means of the adhesive layer (300) is adhered, remain adhered to the substrate, wherein the void layer (100) is formed such that second portions (602) of the at least one information layer (600a, ..., 600n) underlying the at least one second region (102) of the void layer (100) are arranged, when detaching the film structure (1) from the substrate of the object to which the film structure (1) by means of the adhesive layer (300) is adhered to the cover film (200) adhere. A film structure according to any one of claims 1 to 10, comprising: an adhesive layer (300) for adhering the film structure (1) to a substrate of an object, the adhesive layer (300) being arranged in the film structure (1) under the void layer (100), wherein the pattern layer (400) is disposed between the void effect layer (100) and the adhesive layer (300), - The background color layer (500) between the pattern layer (400) and the adhesive layer (300) is arranged. Film structure according to one of claims 1 to 11,
wherein the cover layer (200) is formed as a transparent film. Film structure according to one of claims 1 to 12,
wherein the film structure (1) is formed as a self-adhesive label or as a label.

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