WO2014117910A1

WO2014117910A1 - Product securing element

Info

Publication number: WO2014117910A1
Application number: PCT/EP2014/000028
Authority: WO
Inventors: Alexander Bornschlegl
Original assignee: Giesecke & Devrient Gmbh
Priority date: 2013-01-30
Filing date: 2014-01-09
Publication date: 2014-08-07
Also published as: DE102013001558A1

Abstract

The invention relates to a product securing element (10) for safeguarding a product to be protected, having an interactively triggered authentication mark (20) which contains effect pigments which can be reversibly oriented by an external magnetic field, which effect pigments are encapsulated in a microcapsule (22) and are substantially freely rotatable in the microcapsule (22). When triggered interactively by an external magnetic field, the authentication mark (20) shows a change of image which can be recognised visually and/or mechanically.

Description

Product safety element

The invention relates to a product securing element for securing a product to be protected. The invention further relates to a method for producing such a product securing element and a product securing arrangement with such a product securing element. It is customary to provide security documents such as banknotes, shares, identity cards, credit cards, certificates and the like with security elements which make it possible to check the authenticity of the value documents and at the same time serve as protection against unauthorized reproduction. To increase the protection against counterfeiting, costly processes using a large number of different printing processes are often used for the production of such security elements.

However, simpler production techniques are desirable for the manufacture of fuse elements for product protection because the products to be protected are often individualized disposable products and, when considered in economic terms, the benefits of a protected product should outweigh the cost of producing and using a fuse element. Proceeding from this, the object of the invention is to specify a product securing element which combines cost-effective production with high counterfeit protection.

This object is achieved by the product securing element with the features of the main claim. A method of manufacturing such a product securing element and a product securing arrangement with such a product securing element are given in the independent claims. Further developments of the invention are the subject of the dependent claims. According to the invention, a product securing element for the protection of a product to be protected on an interactively triggerable authenticity plate containing reversible by an external magnetic field effect pigments which are encapsulated in a microcapsule and in the microcapsule are substantially free to rotate, the Echtheitskennzei- Chen shows a visually and / or machine-recognizable image change in the interactive triggering by an external magnetic field.

Since the magnetically alignable effect pigments used are essentially freely rotatable in their microcapsules, they can be aligned interactively in the form of a motif to be displayed by an external magnetic field during the authenticity check. Without external magnetic field, the effect pigments are substantially isotropically aligned within their microcapsule, so that the authenticity mark generally gives a homogeneous image impression.

However, if the authenticity mark is brought directly by a user via a test magnet, for example a permanent magnet designed in the shape of a motif, the visual appearance of the authenticity mark changes interactively in the area above the magnet due to the orientation of the effect pigments and displays an effective, three-dimensional appearing appearance. The concretely visible image results in each case from the locally different orientation of the effect pigments in the microcapsules in the spatially varying field of the test magnet and can be determined by the user by a movement of the product safety device. elements or the test magnet are interactively changed. If the product securing element is removed again from the test magnet, the magnetically oriented effect pigments, due to their mobility within the capsule shell, relax after some time into the essentially isotropic initial state.

The change in the visual appearance, which represents the above-mentioned visually recognizable change of image, is thus triggered interactively and is completely reversible. Although in some designs the change in appearance may be hidden to the human eye by appropriate means, but may be detectable by machine, for example, with an optical detection unit sensitive to the infrared or ultraviolet spectral range. The change of appearance then represents a machine recognizable image change.

For the specific embodiments and variants of the reversibly magnetically alignable effect pigments and the microcapsules, as well as for further details on the mode of operation, reference is made to the publications WO 2009/074284 A2 and WO 2012/130370 Al, the disclosure of which is incorporated into the present description. In the present description, in the case of the reversibly magnetically alignable effect pigments, often only the shorter term "pigment" is used instead of the term "effect pigment". In suitable configurations, the product securing element contains a substrate into which the microcapsules with the reversibly magnetically alignable effect pigments are introduced, and / or onto which the microcapsules with the reversibly magnetically alignable effect pigments are applied. The substrate is preferably provided with an adhesive layer for applying the product securing element to the product to be protected. In some designs, the adhesive layer may also contain microcapsules with reversibly magnetically alignable pigments.

In an advantageous variant of the invention, the substrate contains a plastic film, in the volume of which the microcapsules with the reversibly magnetically alignable effect pigments have already been introduced during the production of the plastic film. Advantageously, the plastic film contains microcapsules with a mean diameter d ₉ 5 below 20 μιτι. Also advantageously, the microcapsules may be present in a proportion of from 5% to 45%, preferably from 10% to 25%, by weight in the plastic film. The microcapsules can be present in the entire volume of the plastic film, but with particular advantage the microcapsules are introduced by coextrusion only in partial areas of the plastic film. This is particularly economical and flexible, since the microcapsules must then be applied only in the required parts.

In advantageous embodiments, the substrate is a multilayer laminated composite in which at least one sub-layer of the laminating composite has the microcapsules with the reversibly magnetically alignable effect pigments.

In one development of the invention, it is provided that the microcapsules are introduced into the substrate of the product securing element and that the substrate is printed in first, a magnetic effect-facing portions with translucent printing inks, in particular with glazing vivid colors, and is printed in second, no magnetic effect showing portions with opaque inks. By overprinting with translucent printing inks, the color impression of the pigments can be specifically influenced and changed. The overprinting with opaque inks allows to hide the magnetic effect in some areas in front of the viewer. As explained in more detail elsewhere, however, the magnetic effect in these areas can still be detectable by machine, for example by overprinting of the microcapsules with an ink which is opaque in the visible spectral range but largely transparent in the near infrared.

In further, likewise advantageous embodiments, the microcapsules with the reversibly magnetically alignable effect pigments are present in a printed layer applied to the substrate. The microcapsules can be present in the printing layer together with colored pigments and / or with optically variable effect pigments, which are preferably non-magnetic and / or transparent or translucent. The optically variable effect pigments may in particular be liquid-crystal pigments, pearlescent pigments or interference-layer pigments. The interactively triggerable authenticity mark is overprinted according to a further preferred embodiment with at least one print layer of a translucent printing ink in order to adapt the color impression of the reversibly magnetically alignable pigments to a predetermined color impression.

Advantageously, the product securing element further includes a dark background layer for the interactive triggerable authentication mark. Due to the dark background layer, the effect of the reversibly magnetically orientable pigments is particularly pronounced. The dark background layer can be formed over the entire surface or in the form of patterns, characters or a coding.

In further advantageous embodiments, the product securing element contains a hard or soft-magnetic functional structure in a subregion. The magnetic functional structure can be formed for example by the magnetic strip of a ticket, a bank card or credit card. Some design articles also have magnetic or magnetizable applications, such as rivets, clips or special closures, which can form the magnetic functional structure of the product securing element.

A magnetic functional structure can also be selectively introduced into the product securing element only for the purpose, in order to specify an internal magnetic field or an increased magnetizability there. In all cases, the magnetic effect of the reversibly magnetically alignable pigments results from a superposition of the field generated by the magnetic functional structure with a magnetic field applied during the authenticity check from the outside.

The interactively triggerable authenticity indicator does not necessarily have to be visible to the human eye. Rather, the interactively triggerable authenticity mark can also be hidden under a layer which absorbs in the visible spectral range and is substantially transparent in the ultraviolet and / or infrared spectral range. The characteristic magnetic effect can then be detected only with an optical detection unit which is sensitive to the ultraviolet or infrared spectral range.

In an advantageous variant of the invention, the product securing element is a brand protection label, preferably with a peel-off indicator. Such Trademark protection labels may be applied, in particular, to branded articles, food packaging or other product packaging, electronics products with a high risk of counterfeiting, such as batteries, wristwatches, mobile phones and the like, to data carriers with a risk of counterfeiting, such as CDs, DVDs or BluRay media, or they may be used as visa stickers for immigration authorities, as a seal of approval for alcohol, cigarettes and the like, as labels for pharmaceutical products, as seals for sovereign documents, such as tax stamps, documents and the like, or as a secure device and nameplates.

In a further advantageous variant of the invention, the product securing element is a thermoformed plastic film, in particular a blister terverpackung for tablets or capsules, or a molded part of a branded article, such as mobile phone shells or other housing parts. The product protection element can also be used as a raw material for thermoforming or other thermoforming processes, or as a raw material for masterbatch production, for injection molded parts or the plastic coating of textiles, CDs, DVDs or BluRay media. According to a further advantageous variant of the invention, the product securing element is a plastic film in a plastic card, such as a prepaid card, ID card, credit card or the like, or in a value document, for example in the form of an intermediate layer of a passport data page in a passport.

The product securing element can advantageously also be used on paper, cardboard or laminated and laminated hybrid substrates, for example in the case of tickets and entrance tickets, value checks, passport paper, passport pages or transport papers. Furthermore, the product securing element can be produced by direct printing of a desired substrate, for example in the form of a seal or tamper-evident closure, in particular for bottles or boxes, or in the decoration of branded articles such as bags, leather goods and the like.

Finally, the product securing element can also be part of adhesives that are applied to the product to be protected. The invention further includes a method for producing a product securing element, wherein the method microcapsules are provided in which by an external magnetic field reversibly alignable effect pigments are encapsulated, which are substantially freely rotatable in the microcapsules. The microcapsules with the reversibly magnetically alignable effect pigments are introduced into a substrate or are applied to a substrate, whereby an interactively triggerable authenticity mark is generated, which exhibits a visually and / or machine-recognizable image change during interactive triggering by an external magnetic field.

The invention further includes a product securing arrangement for securing a product to be protected with a product securing element of the type described above and having a verification element with a magnetic region, wherein preferably in the magnetic region magnetic material in the form of patterns, lines, characters or a coding is present. In particular, the magnetic region may be formed by a permanent magnet of a portable or stationary device, in particular a mobile telephone, a portable computer, a portable audio and / or video player, a security system, in particular an electronic device. be formed by motor magnets of cash tapes, loudspeaker magnets on monitors, by electromagnetic closures or openers to cash drawers or by a magnetic closure, such as a handbag, of a magnetic security or akustomagnetischen goods security system.

The verification element can also be an adapted testing device, for example a test pin with a magnetic tip, which, as described in more detail below, makes reliable verification of the authenticity of even thick objects possible.

The product securing elements according to the invention can be produced at lower cost and at lower cost than conventional security elements for banknotes and the like, and are therefore economically viable even for only short-term or single use.

Further exemplary embodiments and advantages of the invention will be explained below with reference to the figures, in the representation of which a representation true to scale and proportion has been dispensed with in order to increase the clarity.

Show it:

1 is a schematic representation of a brand protection label according to the invention,

FIG. 2 is a cross-sectional view of the trademark protection label of FIG. 1 for a particular embodiment of the invention. FIG. 3 to 6 are cross-sectional views of trademark protective labels according to further embodiments of the invention,

FIGS. 7 and 8 schematically show further variants of product assurance elements according to the invention, using the example of securing a

Bottle,

9 to 11 schematically further embodiments of inventive product securing elements in the form of customs seals for cigarette boxes,

12 shows a ticket with a functional magnetic strip according to a further exemplary embodiment of the invention, FIG. 13 shows in (a) schematically the generation of a device according to the invention

Component by Thermof ormen and in (b) the finished component, and

14 in (a) to (g) particularly advantageous embodiments of the invention in a schematic representation.

The invention will now be explained using the example of various product securing elements for branded articles and valuables. The described product securing elements illustrate only some of the embodiments covered by the invention and are therefore not intended to be limiting or conclusive. 1 and 2 show a schematic representation of a brand protection label 10 according to the invention, FIG. 1 showing the trademark protection label in top view and FIG. 2 a cross-sectional view for a particular exemplary embodiment. The brand protection label 10 includes a label substrate 12, preferably a plastic film, such as biaxially oriented polypropylene (BOPP) or polyethylene terephthalate (PET). The brand protection label 10 comprises, in a manner known per se, a release indicator 14 (often referred to as "tamper proof") and a plurality of graphic design elements 16 applied to the front side of the label substrate 12. The back side of the label substrate 12 is provided with one or more further layers 18, which in particular comprise an adhesive layer for applying the brand protection label 10 to the product to be protected.

According to the invention, in an area of the brand protection label 10, in addition to the features mentioned, an interactively releasable authenticity mark 20 is provided which contains a multiplicity of microcapsules 22 each containing a capsule shell, a carrier liquid enclosed in the capsule shell and at least one magnetically alignable pigment. The pigment is essentially freely rotatable in the microcapsule and reversibly alignable by an external magnetic field. Such interactively triggerable authenticity marks are described in more detail with their construction and their mode of operation, for example in the publications WO 2009/044228 A2 and WO 2012/130370 A1, the disclosure of which is incorporated into the present description to this extent.

In the exemplary embodiment shown in FIG. 2, the microcapsules with the reversibly alignable pigments are present only in a partial region of the label substrate 12. In other configurations, the microcapsules having the reversibly alignable pigments may also be distributed over the entire volume of the label substrate 12, as illustrated in the embodiment of FIG. 3. When reversibly alignable pigments are introduced into the substrate of the brand protection label 10 or another product securing element, it is fundamentally possible to introduce the microcapsules directly into a polymeric material, for example polypropylene (PP) or polyethylene terephthalate, in a suitable melting and extrusion process, and to form one Further processing foil, which then serves as a substrate of the product securing element. In this variant, typically bubble extrusion processes or extrusion processes with downstream uniaxial or biaxial rolling and / or stretching processes are used. Preferably, microcapsules are used in this variant, which have a mean diameter d ₉ 5 of less than 20 μιη.

The thickness of the film made of the polymeric material is preferably in the range of 1.5 to 20 times the average diameter d ₉ 5 of the microcapsules with a preferred pigmentation of 5 wt .-% to

45 wt .-%, particularly preferably from 10 wt .-% to 25 wt .-%. Polypropylene can advantageously be colored for use and / or provided with fillers. The introduction of the microcapsules in the form of a masterbatch granulate having a microcapsule pigment content of 45% by weight to 65% by weight has proven particularly useful. The use of microcapsules with a capsule wall with increased flexibility is advantageous, especially if the film is further thinned by rolling processes.

FIG. 3 shows a cross section through a brand protection label 10 whose label substrate 12 consists of such a microcapsule-pigmented PP film. The interactive triggerable authenticity mark 20 with the plurality of microcapsules 22 in this variant occupies the entire surface of the brand protection label. If certain areas of the brand protection label show no magnetic effect, opaque Layers applied to the authenticity mark 20, for example, be printed.

By means of single or multi-stage co-extrusion processes, it is possible to produce multi-layered films. For example, it is possible to produce films which contain microcapsules with reversibly alignable pigments in one layer and another polymeric material in another layer. This variant is particularly preferred if this further material contains fillers and / or pigments, for example black pigments, dark colored dyes, effect pigments or magnetic pigments, which enhance the effect of the reversibly alignable pigments. Fig. 4 shows as an example a brand protection label 10, the label substrate 12 consists of such a multilayer film, namely a first, microcapsule pigmented PP Teilf olie 24 and a second, provided with black pigments 26 sub-film 28. The second sub-film 28 forms so a dark background layer, which makes the visual effect of the reversibly magnetically alignable pigments of the first partial film 24 particularly prominent.

In a modification of the variant of FIG. 4 is a transparent PP (BOPP) film having a thickness of 100 μιη, between 5 wt .-% and

Contains 50 wt .-%, for example 15 wt .-% of microcapsules with reversibly magnetically alignable pigments, laminated by means of pressure and temperature with a black PP (BOPP) film of a thickness of 50 μιη to form a composite material. The black background creates a label substrate 12 with a highly visible response to magnetic fields. Such security labels are particularly well suited for use on bottles, pharmaceutical packaging and cigarette packets. Returning to the illustration of FIG. 2, a plastic substrate 12 can be produced by means of a special coextrusion with strip nozzles, which contains the microcapsules 22 with the reversibly magnetically alignable pigments only in one or more strip-shaped subregions. This is particularly economical and flexible, since the material with the microcapsules 22 is applied only in the required parts.

In the case of the brand protection label 10 of FIG. 5, the label substrate 12 of FIG. 2 is provided on its front side with a further laminate or lamination cover layer 30. The laminate or liner cover layer 30 may include, on the one hand, further security features, such as e.g. a hologram foil, embossed foils, etc., have. In addition, the cover layer 30 may also have additional design elements, which increase the recognition value and thus also the protection against forgery of the product securing element. Also, the cover layer 30 can advantageously as (scratch) -

Protect, especially if the underlying layer contains a high (volume) proportion of microcapsules. Finally, the cover layer 30 is also helpful in providing the capsule layer with a homogeneous color impression.

In another variant, not shown in the figures, a plastic film, which is completely or partially provided with reversibly magnetically alignable pigments, between two, for example, 75 μπι thick thermoplastic polymer films are introduced and laminated under pressure and temperature application to form a composite. The composite thus obtained then serves as a substrate for a product securing element according to the invention. In a further advantageous laminating solution, a sub-area printed or coated substrate, for example of cotton or cellulose, with a preferred weight of 50 g / m ² to 450 g / m ² by means of heat and pressure on both sides with a thin plastic film, in particular Thickness range of 5 μιη to 100 μπ \ laminated. In this case, at least a portion of the substrate contains microcapsules with reversibly magnetically alignable pigments, preferably in one or more of the printed or coated areas. Additionally or alternatively, the reversibly magnetically alignable pigments can also be incorporated into the laminating adhesive. The printed or coated portions of the substrate are preferably formed in the form of ornaments, numbers or figures. The grammage of the substrate is particularly preferably in the range of 60 g / m ² to 150 g / m ² and the thickness of the plastic films is particularly preferably in the range of 5 μιη to 12 μιη.

Product fuse elements can be provided with the desired microcapsules with reversibly magnetically alignable pigments in various ways. In the variants described with reference to FIGS. 1 to 5, the microcapsules 22 are introduced into the label substrate 12 of the label 10. Another possibility is to apply the reversibly magnetically alignable pigments to the label substrate 12 by printing technology.

While security elements such as banknotes are typically manufactured at great expense with a variety of different printing processes, in the production of brand protection labels for cost reasons usually simpler production techniques with fewer printing steps in the foreground. In particular, in addition to offset printing, gravure and flexographic printing, in some cases also screen printing methods for applying micromachining encapsulated with reversibly magnetically orientable pigments. Although inkjet or toner-based digital printing processes are not suitable for their application due to the size of the microcapsules, they can nevertheless be used in the context of the invention to alter the perceptible effect and visual impression of the pigments, as described in more detail below.

To apply the microcapsules with printing inks, aqueous emulsion paints, UV-curing or solvent-containing systems are preferably used. In order to obtain a visually appealing color impression, in addition to the microcapsules, it is also possible to use colored inks and / or further non-encapsulated effect pigments. The use of non-encapsulated effect pigments, in particular of optically variable effect pigments, such as liquid crystal pigments, pearlescent pigments or interference layer pigments, is advantageous because they produce a very good visual impression on the typically very smooth and regular label substrates because of their resulting good alignment. This can be further enhanced by color systems with an evaporating ingredient, such as water or other solvents.

By way of illustration, Figure 6 shows a badge 10 having a label substrate 12 of a plastic material which, like the label of Figure 1, is provided with a release indicator and a plurality of graphic design elements 16 applied to the front of the label substrate 12. The back side of the label substrate 12 has, for example, an adhesive layer 18 for applying the brand protection label 10 to the product to be protected. The interactively triggerable authenticity mark 20 with the microcapsules 22 is printed in this variant of the invention in gravure, flexographic or screen printing. Fig. 6 shows only a printed area 32, they are Of course, but also several, even with different pigmented inks printed areas possible. The one or more printing inks preferably contain between 10% by weight and 35% by weight of microcapsules with reversibly magnetically alignable pigments and / or between 5% by weight and 15% by weight of platelet-shaped effect pigments.

The areas 32 printed with the pigmented printing ink are preferably made flat, as shown, for example, in the strip-shaped authenticity mark 20 of FIG. This creates a brand protection label 10, which is particularly well suited for use on bottles, pharmaceutical packaging and cigarette packs.

Figures 7 and 8 show schematically further variants of product securing elements according to the invention for securing a bottle 40, such as a liquor bottle with a cap 50. In the area between cap 50 and bottle neck 42 is a brand protection label 44 with microcapsules with reversibly magnetically alignable pigments, for example according to one of Figures 1 to 6 applied. The brand protection label 44 forms a functional seal which is broken upon first opening of the closure cap 50.

Alternatively or additionally, a brand protection label 10 with an interactively releasable authenticity mark 20 can be applied to the bottle 40 in the area of the bottle body 46, as described in more detail in connection with FIG. 1, for example.

The closure cap 50 itself can also form a product securing element, as illustrated in FIG. 8. For example, a dark plastic or dark painted aluminum cap 50 with a tampon printing ink 52 printed, containing 20 wt .-% microcapsules 22 with reversible magnetically orientable pigments with golden yellow reflection color. After drying, the cap 50 shows a good response to magnetic fields.

In a further variant of the invention is a textile-reinforced film of polyvinyl chloride (PVC), which can be used for example for the production of designer handbags or as a sealable tarpaulin, screen printing with a printing ink of a PVC plastisol and 30 wt .-% microcapsules with reversibly magnetically alignable pigments printed in the form of ornaments, patterns or figures. After a temperature treatment, a haptic design element is created on the film, which reacts to magnetic fields and can thus be used for checking the authenticity.

Further examples of product securing elements according to the invention are shown in FIGS. 9 to 11 using the example of customs seals for cigarette packets. 9 shows a cigarette box 60 having a box body 62 and a hinged lid 64. A bonded seal 70 formed by a trademark protection tag having an interactively releasable registration mark 20 of FIG. 1 extends over a lateral opening edge 66 of the cigarette box 60 and becomes the box when opened for the first time Broken.

In the embodiment of FIG. 10, a tax stamp 72 with an interactively triggerable authenticity mark 20 according to FIG. 1 is mounted on a front opening edge 68 of the cigarette pack 60, so that the tax stamp 72 is broken when the box is opened for the first time. The detail of FIG. 11 shows the control mark 72 together with a test pin 74 with a magnetic tip 76. If the magnetic tip 76 is placed on the control mark 72 by a user for authenticity testing, then the authenticity mark is triggered interactively in a surrounding area 78 of the touchdown point. By moving the test pin 74 along a path 80, the surrounding area 78 moves along a corresponding track 82 over the area of the authenticity mark 20 with the test pin 74. By using such a test pin 74, product securing members applied to thick objects such as the cigarette box 60 can also be reliably tested for authenticity.

FIG. 12 shows, as a further exemplary embodiment, a ticket 90 with a magnetic strip 92 and further graphic or alphanumeric design elements 94. The magnetic strip 92 may have hard or soft magnetic properties and essentially serve to encode a desired information 98. The ticket 90 is provided in the region of the magnetic strip 92 with an imprint 96 of an ink which has micro-capsules with reversibly magnetically alignable pigments, so that the imprint 96 forms an interactively triggerable authenticity mark. The interaction of the information 98 of the magnetic strip with an applied external magnetic field produces a characteristic change in the total magnetic field acting on the microcapsules of the authenticity mark.

In addition to the production variants described so far, substrates provided with microcapsules can also be made into a desired shape, for example by thermoforming. Also a processing of with Microcapsules provided raw material by injection molding or other molding methods is possible. By way of illustration, Fig. 13 (a) shows schematically the manufacture of a component by thermoforming. In this case, a substrate film 100 with microcapsules with reversibly magnetically alignable pigments runs from a roller 102 to a heated molding tool 104, in which the substrate film 100 is brought into the desired shape. After cooling, the thermoformed film having the desired shape 106 is passed to a punching station. The stamped out finished component 108 with the contained microcapsules 22 is again shown separately in FIG. 13 (b). By thermoforming various, even voluminous product securing elements, such as housing shells for mobile phones, can be produced. As a result, a thermoformed, pigmented component itself can be used for product safety. In the context of the invention, particularly advantageous structures are compiled in Fig. 14. First, Fig. 14 (a) shows the refinement of a substrate containing microcapsules with reversibly magnetically alignable pigments. The product securing element 110 contains a plastic substrate 112, which has been provided in the manner described above with microcapsules 22 with reversibly magnetically orientable pigments which have a silver-gray reflection color. On one side, the plastic substrate 112 is provided with a black print layer 114. On the opposite, non-black side, the plastic substrate 112 is printed in the inkjet process with glazing colors 116. This makes it possible to adjust the color impression of the reversibly magnetically alignable pigments in many areas as desired. In addition, by using a digital printing method, an individualization can be made, for example a serial number or the like can be generated. Areas of the product securing element 110 that have no magnetic effect show are printed with opaque colors 118. This can either be done in inkjet digital printing or with normal offset or gravure printing. The refinement of a pre-printed substrate is illustrated in Fig. 14 (b). Here, a single-layer or multi-layer transparent plastic substrate 120 is overprinted on both sides with structures of opaque printing inks 122, 124 and transparent printing inks 126. At least one printing ink 124 contains microcapsules 22 with reversibly magnetically alignable pigments and is applied in tampon, screen or gravure printing.

FIG. 14 (c) shows a single-layer or multi-layer transparent plastic substrate 130, which contains microcapsules 22 with reversibly magnetically alignable pigments, at least in partial regions 132. The plastic substrate 130 is printed on the front side and / or the rear side with different designs and colors 134-1 to 134-5, so that a different visual impression is created from both sides.

The structure of Fig. 14 (d) illustrates a seal using a brittle UV varnish. Through a background structure 140, such as a bottle cap or bottle neck, which is provided in a partial area with a security label 142 having an interactive triggerable authenticity mark formed a substrate for the subsequently applied ink. The security label 142 may be formed, for example, in the manner described in FIG. 1. The substrate formed from background structure 140 and security label 142 is overprinted with a printing ink 144 in the screen printing or pad printing process in such a way that the printing ink 144 comes to lie both on the security label 142 and on the background structure 140. The printing ink 144 is based on a brittle UV Lacks formed so that the seal can be easily broken and the seal break is easy to recognize. The result is a functional seal whose authenticity can be checked by a magnetic field. Fig. 14 (e) shows a tamper-evident closure 150 for a bottle according to another embodiment of the invention. In this case, microcapsules 22 with reversibly magnetically alignable pigments in an ink 152 are applied directly to a region between a closure 154 and the bottle neck 156 of a bottle. This measure also creates a functional seal 150, which is broken by the first opening of the closure 154.

In the structure of FIG. 14 (f), a print layer 164 with microcapsules 22 with reversibly magnetically alignable pigments on and / or next to a magnetic functional structure 162 is applied. A valuable article 160, for example the ticket of FIG. 12, has in subregions in addition to graphic or alphanumeric design elements 166 a hard- or soft-magnetic functional structure 162. The item of value 160 is printed in the immediate area of this functional structure 162 with the pigmented printing ink 164. The interaction of the magnetic regions 162 with an applied external magnetic field produces a characteristic change in the total magnetic field acting on the pigments.

In addition to tickets, bank or credit cards often have magnetic stripes which are suitable for a combination according to the invention with an interactively triggerable authenticity mark. Also design items with magnetic applications, such as rivets, clips or special closures, come into consideration. Magnetic functional structures can also be deliberately introduced into the object to be protected, for example by soft magnetic metal foils are introduced into a multilayer substrate.

Fig. 14 (g) shows a structure in which the microcapsules 22 are used concealed with the reversibly magnetizable pigments. The construction illustrates that the reversibly magnetically alignable pigments in the trademark protection are not necessarily applied visibly to the human eye, but are hidden, for example, under a layer absorbing in the visible region of the electromagnetic spectrum. The characteristic behavior of the pigments is then possible only with the aid of an optical detection unit which is sensitive in the relevant spectral range. For example, in the embodiment of FIG. 14 (g) on a plastic film 170, a print layer 172 with the microcapsules 22 is printed. The printing layer 172 is overprinted with a black printing ink 174 which is highly absorbent in the visible spectral range but largely transparent in the near infrared. Such a hidden use of the interactively triggerable authenticity mark is of particular interest for ID documents since, in any case, infrared-sensitive detection systems are often used to test such documents.

LIST OF REFERENCE NUMBERS

10 brand protection label

12 label substrate

14 detachment indicator

16 graphic design elements

18 more layers

20 authenticity marks

22 microcapsules

24 first partial film

26 black pigments

28 second sub-film

30 topcoat

32 printed area

40 bottle

42 bottleneck

44 brand protection label

46 bottle body

50 cap

52 pad printing ink

60 cigarette box

62 box bodies

64 hinged lid

66 lateral opening edge

68 front opening edge

70 inches seal

72 tax stamp

74 test pin 76 magnetic tip

78 Ambient area

80 train

82 train

90 ticket

92 magnetic stripes

94 design elements

96 imprint

98 information

100 substrate film

102 roll

104 mold

106 desired shape

108 finished component

110 product securing element

112 plastic substrate

114 black print layer

116 stained color

118 opaque color

120 plastic substrate

122, 124 opaque inks

126 transparent printing inks

130 plastic substrate

132 subareas

134-1 to 134-5 different designs and colors

140 background structure

142 security label

144 printing ink

150 seals 152 printing ink

154 closure

156 bottleneck

160 valuable item

162 magnetic functional structure

164 print layer

166 design elements

170 plastic film

172 print layer

174 black ink

Claims

Patent claims

A product protection element for securing a product to be protected, having an interactively releasable registration mark containing reversibly alignable effect pigments encapsulated in a microcapsule and substantially freely rotatable within the microcapsule, wherein the authentication mark is interactive triggering by an external magnetic field shows a visually and / or machine recognizable image change.

2. Product fuse element according to claim 1, characterized in that the product securing element contains a substrate, in which the microcapsules are introduced with the reversibly magnetically alignable effect pigments, or on which the microcapsules are applied with the reversibly magnetically alignable effect pigments.

3. Product fuse element according to claim 2, characterized in that the substrate is provided with an adhesive layer for applying the product securing element to the product to be protected.

4. Product fuse element according to claim 2 or 3, characterized in that the substrate contains a plastic film, in whose volume the microcapsules with the reversibly magnetically alignable effect pigments are incorporated in the production of the plastic film.

5. Product protection element according to claim 4, characterized in that the plastic film microcapsules having a mean diameter below 20 μιη contains and / or that the microcapsules in a from 5% to 45%, preferably from 10% to

25 wt .-% present in the plastic film.

6. Product protection element according to claim 4 or 5, characterized in that the microcapsules by coextrusion only in partial areas of

Plastic film are introduced.

7. Product fuse element according to at least one of claims 2 to 6, characterized in that the substrate is a multilayer Kier schier verbünd, in which at least a partial layer of Kaschier composite containing the microcapsules with the reversibly magnetically alignable effect pigments.

8. product fuse element according to at least one of claims 2 to 7, characterized in that the microcapsules are introduced into the substrate, and that the substrate is printed in first, a magnetic effect showing partial areas with translucent printing inks, in particular with glazing vivid colors, and in second, no magnetic effect showing partial areas is printed with opaque inks.

9. Product fuse element according to claim 2 or 3, characterized in that the microcapsules are present with the reversibly magnetically alignable effect pigments in a printed layer applied to the substrate.

10. Product fuse element according to claim 9, characterized in that the microcapsules are present in the printing layer together with colored pigments and / or with optically variable effect pigments, which are preferably non-magnetic and / or transparent or translucent.

11. Product fuse element according to at least one of claims 1 to 10, characterized in that the interactively releasable authenticity mark is overprinted with at least one printing layer of a translucent printing ink in order to adapt the color impression of the reversibly magnetically alignable pigments to a predetermined color impression.

12. Product fuse element according to at least one of claims 1 to 11, characterized in that the product securing element contains a dark background layer for the interactively releasable authenticity label.

13. Product fuse element according to at least one of claims 1 to 12, characterized in that the product securing element contains a hard or soft magnetic functional structure in a partial area.

14. Product fuse element according to at least one of claims 1 to 13, characterized in that the interactively triggerable authenticity mark is hidden under a absorbing in the visible spectral range and in the ultraviolet and / or infrared spectral range substantially transparent layer.

15. Product fuse element according to at least one of claims 1 to 14, characterized in that the product securing element is a brand protection label, preferably with a detachment indicator.

16. Product fuse element according to at least one of claims 1 to 14, characterized in that the product securing element a Thermogef ormte plastic film, in particular a blister pack or a molded part of a branded article is.

17. Product fuse element according to at least one of claims 1 to 14, characterized in that the product securing element a

Plastic film is in a plastic card or in a document of value.

18. Product securing element according to at least one of claims 1 to 14, characterized in that the product securing element is a seal or tamper-evident closure, in particular for bottles or boxes.

19. A method for producing a product securing element, wherein microcapsules are provided in which by an external magnetic field reversibly alignable effect pigments are encapsulated, which are substantially freely rotatable in the microcapsules, and wherein the microcapsules with the reversible magnetically alignable effect pigments in a substrate be introduced or applied to a substrate, whereby an interactively triggerable authenticity mark is generated, which shows a visually and / or machine-recognizable image change in the interactive triggering by an external magnetic field.

20. A product safety arrangement for securing a product to be protected with a product securing element according to one of claims 1 to 18 and with a verification element with a magnetic region, preferably in the magnetic field magnetic material in the form of patterns, lines, characters or a coding.

21. A product safety arrangement according to claim 20, characterized in that the magnetic region by a permanent magnet of a portable or stationary device, in particular a mobile phone, a portable computer, a portable audio and / or video player or a merchandise security system, or by a magnetic closure, such as a handbag is formed.