EP1185422A1 - Optically variable security attribute - Google Patents

Optically variable security attribute

Info

Publication number
EP1185422A1
EP1185422A1 EP20000952853 EP00952853A EP1185422A1 EP 1185422 A1 EP1185422 A1 EP 1185422A1 EP 20000952853 EP20000952853 EP 20000952853 EP 00952853 A EP00952853 A EP 00952853A EP 1185422 A1 EP1185422 A1 EP 1185422A1
Authority
EP
Grant status
Application
Patent type
Prior art keywords
optically variable
pedt
pss
variable security
security feature
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP20000952853
Other languages
German (de)
French (fr)
Other versions
EP1185422B1 (en )
Inventor
Frank Puttkammer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WHD Elektronische Pruftechnik GmbH
Original Assignee
WHD Elektronische Pruftechnik GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41MPRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/14Security printing
    • B41M3/148Transitory images, i.e. images only visible from certain viewing angles

Abstract

The invention relates to an optically variable security attribute for documents, securities, banknotes, packagings, and goods. The aim of the invention is to provide an optically variable security attribute having concealed detectable attributes in order to increase the security against counterfeiting. To this end, the invention provides an optically variable security attribute comprising diffractive structures that consist of an electrically conductive polymer and of at least one supporting film (1), a protective layer (7), a lacquer coat (3), and a reflecting layer (4), and the electrically conductive polymer is a polyethylene dioxythio polystyrene sulfonate (PEDT/PSS) arranged on different layers.

Description

Optically variable security feature

The invention relates to an optically variable security attribute for documents, securities, bank notes, packaging and goods.

The protection against forgery of documents, securities, bank notes, packaging and products could be improved by the introduction of optically variable security features in a decisive manner. One kind of optically variable security features include holograms whose human visually recognizable information is subject to change when viewing from different angles. This effect provided good copy protected, since the angle-dependent changes could not be mimicked by a copy machine.

Such holograms conventionally consist of a carrier film, a layer of hardenable lacquer, are characterized in that diffractive structures, as well as of a reflection and an additional protective layer. The reflective layer is carried out at holograms as a uum in Hochva- deposited, highly brilliant metallization which may additionally contain for authenticating a functional design in the form of human or visually recognizable by human vision can not be seen, demetallized sites. This demetallized sites may be in the form of characters, letters or geometric figures. Required for the preparation of holograms technological equipment and analytical instruments for detecting micro lettering and micro-design currently are even counterfeiters cheaply available so that the desire is for an increase in security against counterfeiting by introducing additional, possibly covert, detectable features.

DE 298 07 638 is known to the embossing of a hologram film, which is provided with one or more security features recognizable with an additional human vision, provide individualized marking. This identification is done among other things by the removal of an existing reflective layer, wherein the resulting interruptions for the identification are used. It is also clear from DE 40 30 493, that in a multi-layered disk, an optically variable element is applied, subsequently introduced in which, human visually recognizable additional information, for example a pattern for a functional design, are present, which are superposed on the optical effect. Finally, in DE 39 32 505 disk will be described with diffraction structures, the standard information is changed by additional measures in human visually recognizable manner, for example by the removal of the metal layer. As a detectable feature are known from DE 44 19 089 and DE magnetizable glossy pigments and luster pigment mixtures known 44 19 173, which are suitable for generating three-dimensional optical effects by the action of magnetic fields during or after application in the still liquid application medium. They are based on multiply coated platelet-shaped non-ferromagnetic metallic substrates and are used in paints and printing inks. Among other things, they should be able to replace expensive holograms, but the achievable color change is still too low. Also, described in DE 195 15 988 that glossy pigments are used for coloring paints, inks and printing inks.

In DE 33 08 31 is shown also that in holograms the metallic foil is usually used as the reflective layer can also be produced by a vacuum vapor deposition or by the application of thin aluminum layers. Another way is through a geschildertes casting process. When attempting to remove the hologram from the securities, the thin metal layers and the hologram is subject to destruction kolabieren.

December 1995/787 is also known from Research Disclosure, known that ophenen from suitable Polythi-, can, for example, 3,4-polyethylene dioxythiophene light to the eye do not produce visible marks. They absorb light in the near infrared, while they are largely transparent to visible light. Another way of reading the Polythiophenmarkierungen based on their electrical conductivity. With suitable electrode arrangements, the differences in the surface resistance between the non-conductive support and the conductive markings may be registered. It is further known from EP 753 623 to produce a safety arch which as. Counterfeit protection contains an electrically conductive element. The conductive element consists of a polythiophene polymer. Similarly, metal pigments are called containing printing inks. Finally, DE 38 43 075 describes an arrangement in a security document with a security thread containing a metallic coating. In close proximity to said coating a layer containing electrically conductive pigments or a layer of a molecular structure due to its electrically conductive plastic is provided. This layer serves to bridge possible interruptions in the metallic coating of the security thread.

The use of holograms as a security feature for individual objects, whether securities or commodities puts their production forward in large numbers to mostly large industrial plants and at the lowest possible price. By currently practiced technological production process but there are limits to that.

The object of the invention is to provide an optically variable security attribute with covert, detectable features to increase the security against forgery, whereby in spite of its introduction, the preparation should be sufficiently fast and inexpensive Artwork.

This object is solved by the features of claim 1 and their special set forth in the dependent claims embodiments. The features of the inven- tion will become apparent from the claims and from the description and drawings, the individual features are each on their own or together in the form of subcombinations protectable constructions is claimed here for protection. An embodiment of the invention is illustrated in the drawings and will be explained in more detail below.

The inventive solution provides the advantage to provide optically variable security features with covert, detectable characteristics that are not recognizable by human vision and can represent either pictorially or supplemented by bridging interruptions functionally to a testable whole. At the same time the advantage of a continuously running, time-saving and cost-effective process for the production of optically variable security features results in a surprising WEI se. In the accompanying drawings:

Figures 1 to 3 -. The different schematic structure of an optically variable security feature, in part with a functional design 6 in the reflection layer 4.

In Figs. 1 to 3 is a schematic representation of the different structure of an optically variable security feature, for example a hologram, consisting of a carrier film 1, a layer of PEDT / PSS (polyethylenedioxythiophene) 2, of a curable lacquer layer 3, preferably as a carrier of diffractive structures, a reflection layer 4, a protective layer and an adhesive layer 7. 5

In FIG. 2 it is shown that the reflection layer 4 contains a functional design 6 in the form of interrupts.

Fig. 3, the absence of the adhesive layer 5 can be seen. This type structure of an optically variable security attribute is provided for the case that an adhesive layer is already present on the to be applied underground.

The function of the optically variable security feature according to the invention is as follows: Knowing that the reflection layer 4 roschrift a functional design 6 in the form of a micro- or other human vision can not contain detectable interruptions, it's counterfeiters in a short time possible in a introduce such a functional design 6 optically variable security feature. To increase the security against counterfeiting, an electrically conductive feature substance in the form of a layer of PEDT / PSS 2 is applied as a transparent, electrically conductive polymer on the support film. 1 This layer of the PEDT / PSS 2 is human not visually recognizable and only detectable by the detection of their electrical conductivity.

The layer of PEDT / PSS 2 may form a functional design and is to applied to the carrier film 1 as a continuous surface or as a divided by a line-type interruption face. In the first case it can be seen the conductivity of the surface, in the second case to test the electrical interruption of the otherwise electrically conducting surface. but the layer of PEDT / PSS 2 can also act as a line or as a plurality of side by side extending, straight or curved lines to be applied to the carrier foil. 1 In such a case will be appreciated with inspection equipment, the pattern of lines and optionally evaluated. Similarly, the lines 2 may also take the form of dots, the layer of PEDT / PSS. The conductivity of the layer of PEDT / PSS 2 is adjustable by either the type of application or by the kind of its specific formulation.

The reflection layer 4 contains the functional design 6 in the form of interruptions. Preferably, this human vision is no longer discernible interruptions in the reflection layer 4 of the pictorial design of the diffractive structures of the hologram follow. They are more difficult findable in this way.

The functional design in the PEDT / PSS 2 and the functional design 6 of the reflection layer 4 are advantageously arranged in adjacent planes. In this case, parts of the functional design in the PEDT act / PSS 2 and the functional design 6 of the reflection layer 4 together such that interruptions in the reflection layer 4 can be bridged. In this way, a coding machine evaluable results despite the interruptions in the reflection layer. 4 Are the PEDT / PSS 2 and the reflection layer 4 are arranged in separate planes, is advantageously designed their design so that they only together result in a complete picture that is detectable with appropriate test equipment.

The PEDT / PSS 2 shows in comparison with other organic conductors, such as the previously known polythiophenes as well as polypyrrole or polyaniline, substantially better properties. It shows a higher transmission in the visible light. It provides a transparent, colorless to slightly blue colored coatings. Depending on the manufacturing conditions, minimum surface resistances can be achieved. It has better resistance to hydrolysis, good light and temperature resistance, a high absorption in the range of 900 -. 2000 nm and no absorption maximum in the range of visible light up to 800 nm According to the invention the PEDT / PSS is applied in the form of an aqueous Dispersion 2. This type of application blends into the technology of production of such security features such one that no interruptions in the ongoing production process occur. In an advantageous for certain applications variant 2 as a 3,4-ethylenedioxythiophene in its monomeric precursor (EDT) is applied to the provided for this purpose layers of the optically variable security feature, the PEDT / PSS and then with an oxidizing agent, namely ferric Touluolsulfonatlösung in n-butanol, polymerized to PEDT / PSS. 2

Claims

claims
1. An optically variable security feature having diffractive structures composed of an electrically conductive polymer and at least one carrier foil (1), a protective layer
(7), a lacquer layer (3) and a reflective layer (4), characterized in that the electrically conductive polymer ethylendioxythiophenpolystyrolsulfonat a disposed on different layers is poly (PEDT / PSS).
2. An optically variable security feature according to claim 1, characterized in that the PEDT / PSS forms a functional design in the different layers of the security feature.
3. An optically variable security feature according to claim 1 and 2, characterized gekennzeich- net, that the design of the PEDT / PSS and a functional design (6) of the reflection layer (4) are mutually inverted, or by bridging interruptions between electrically conductive zones functionally to a complement testable whole.
4. An optically variable security feature according to one or more of claims 1 to 3, characterized in that the PEDT / PSS as at least one cohesive
Surface is applied to the carrier film (1).
5. An optically variable security feature according to one or more of claims 1 to 4, characterized in that the PEDT / PSS as a surface to the carrier film (1) is applied which is divided by at least one line-type interruption.
6. An optically variable security feature according to one or more of claims 1 to 5, characterized in that the PEDT / PSS as at least one line to the carrier foil (1) is applied.
7. An optically variable security feature according to one or more of claims 1 to 6, characterized in that the PEDT / PSS is spotted on the carrier film (1) applied.
8. An optically variable security feature according to one or more of claims 1 to 7, characterized in that the PEDT / PSS is preferably 105 application according to the formulation CPP.
EP20000952853 1999-06-15 2000-06-14 Optically variable security attribute Revoked EP1185422B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE19928060 1999-06-15
DE1999128060 DE19928060A1 (en) 1999-06-15 1999-06-15 Optically variable security feature and process for its preparation
PCT/DE2000/001908 WO2000076778A1 (en) 1999-06-15 2000-06-14 Optically variable security attribute

Publications (2)

Publication Number Publication Date
EP1185422A1 true true EP1185422A1 (en) 2002-03-13
EP1185422B1 EP1185422B1 (en) 2003-05-28

Family

ID=7911800

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20000952853 Revoked EP1185422B1 (en) 1999-06-15 2000-06-14 Optically variable security attribute

Country Status (10)

Country Link
US (1) US7301682B1 (en)
EP (1) EP1185422B1 (en)
JP (1) JP3913549B2 (en)
KR (1) KR100666631B1 (en)
CN (1) CN1355745A (en)
CA (1) CA2374435A1 (en)
DE (2) DE19928060A1 (en)
DK (1) DK1185422T3 (en)
ES (1) ES2199846T3 (en)
WO (1) WO2000076778A1 (en)

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DE10111851B4 (en) * 2001-03-01 2007-10-25 WHD elektronische Prüftechnik GmbH security features
DE10111847A1 (en) * 2001-03-01 2002-09-12 Whd Elektron Prueftech Gmbh security features
DE10111850C2 (en) * 2001-03-01 2003-07-17 Whd Elektron Prueftech Gmbh safety device
DE10149265A1 (en) * 2001-10-05 2003-04-17 Giesecke & Devrient Gmbh Security marking for goods or packages, used in authentication or logistics tracking, comprises overprinting with inks having different spectral properties
RU2322357C2 (en) 2002-08-28 2008-04-20 Крэйн энд Ко., Инк. Durable devices for ensuring protection from falsification and valuable products, protected from falsification, which use such devices
CN101824776B (en) * 2003-07-14 2012-07-04 Jds尤尼费斯公司 Anti-counterfeit device
DE10343890A1 (en) * 2003-09-19 2005-05-04 Giesecke & Devrient Gmbh the same security element and method for producing
WO2006042568A1 (en) 2004-10-20 2006-04-27 Hueck Folien Ges.M.B.H Substrates comprising electroconductive layers
DE102005031448A1 (en) 2005-07-04 2007-01-11 Polyic Gmbh & Co. Kg Activatable optical layer
US8795730B2 (en) 2006-01-31 2014-08-05 David John Vachon Compositions and methods for promoting the healing of tissue of multicellular organisms
DE102008026216B4 (en) 2008-05-30 2010-07-29 Polyic Gmbh & Co. Kg Electronic switch
US8253536B2 (en) * 2009-04-22 2012-08-28 Simon Fraser University Security document with electroactive polymer power source and nano-optical display
US8212473B2 (en) * 2009-04-22 2012-07-03 Simon Fraser University Flexible polymeric light emitting/charge storage device and system
DE102009033221A1 (en) 2009-07-14 2011-01-27 Human Bios Gmbh Security element for marking or identification of objects and creatures
CN103113782B (en) * 2013-02-05 2014-10-01 陕西科技大学 A dual wavelength titania-containing aqueous absorption preparation optical security ink additive
CN103113779B (en) * 2013-02-05 2014-10-01 陕西科技大学 Dual Wavelength containing ferric oxide light absorption preparation of the aqueous ink additives security
CN103113781B (en) * 2013-02-05 2014-10-01 陕西科技大学 A dual wavelength absorbance cuprous oxide-containing aqueous preparation of optical security ink additive
CN103113783B (en) * 2013-02-05 2014-10-01 陕西科技大学 Containing silica ABSORPTIOPHOTOMETRIC Preparation of aqueous ink additives security
CN103113780B (en) * 2013-02-05 2014-10-01 陕西科技大学 A two-wavelength-containing aluminum oxide Preparation light absorbing security ink additive aqueous

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Also Published As

Publication number Publication date Type
KR100666631B1 (en) 2007-01-10 grant
DE19928060A1 (en) 2000-12-21 application
CN1355745A (en) 2002-06-26 application
CA2374435A1 (en) 2000-12-21 application
EP1185422B1 (en) 2003-05-28 grant
DK1185422T3 (en) 2003-09-15 grant
US7301682B1 (en) 2007-11-27 grant
WO2000076778A1 (en) 2000-12-21 application
DE50002371D1 (en) 2003-07-03 grant
JP2003502688A (en) 2003-01-21 application
JP3913549B2 (en) 2007-05-09 grant
ES2199846T3 (en) 2004-03-01 grant

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