DE10111851B4 - security features - Google Patents

Abstract

Security features preferably for sealing, wrapping, Lock in and welding of documents, to identify the originality, consisting of substrates (10), of planar or scattered metallized applications (13) with a defined sheet resistance and of electrically conductive polymers (12) with a defined Sheet resistance, wherein the difference between the surface resistances is greater than 100 kΩ / □ and in the seals (1), for example, ID and personal documents shrink wrapped are.

Description

The Invention relates to security features - preferably for sealing, wrapping, Lock in and welding of documents - to Identification of originality.

In Connection with one getting higher expectant quality existing copy and computer technology is still with a increasing number of imitations of documents, and to count banknotes. For example, with the help of modern copying techniques fake Banknotes no longer readily humanvisual from real banknotes differ. Therefore, special measures are to be taken that are not overcome with technologies accessible to counterfeiters today and in the foreseeable future can be.

A security document which is provided with at least visually readable characters in transmitted light and is electrically conductive and has additional substances for machine testing is disclosed in US Pat DE 40 41 025 A1 described. The security element preferably consists of a transparent foil strip, which has a visually good verifiable negative writing and is additionally provided with electrically conductive and magnetic materials.

Known are as well Metallization coatings produced by printing. coatings manufactured using metallic inks, let a higher resolution ever by type of printing - for example with scattered prints - too. The binder selection allows the setting of the partial surface resistances. The brilliance of the surface is below the surfaces produced by vacuum coating method. For security features, realized by metallization with partial surface resistance changes at the same time the highest possible Brilliance of the surface, are not applicable industrial technologies, in particular Vacuum technologies available.

From the DE 199 28 060 A1 are known an optically variable security feature with a sheet resistance of 20 to 80 kOhm / ☐ and a method for its preparation.

In addition, from the EP 0 540 139 B1 a safety enclosure carrying ladder with electrically responsive material on each side.

Furthermore, from the DE 689 27 201 T2 a multi-layered security wrapper for protecting documents.

All described various security features, precautions and techniques are increasingly dominated by counterfeiters on a large scale.

task The invention is in addition to overcoming the disadvantages of the prior art, security features - preferably for sealing, wrapping, Lock in and welding of documents - to Identification of originality propose. From the choice only the manufacturer or the authorized Control organ known combination of metallized surfaces, surface brilliance, electrically conductive surfaces and sheet resistance changes are for the forger unconquerable technological hurdles propose.

The solution This object is achieved with the features of claim 1. Advantageous embodiments of the invention are specified in the subclaims.

input The description of the invention is intended to define terms below be as they are understood throughout the claims.

When In the following, sealing will be the sealing, wrapping, enclosing and sealing Welding of Documents, for example identity and personal documents.

Under areal Metallization will be using a homogeneously metallized surface a homogeneous surface brilliance Understood.

Under streaky metallization is a non-homogeneously metallized area or a homogeneously metallized surface with demetallizations or a homogeneously metallized surface with inhomogeneous surface brilliance or a homogeneously metallized surface with inhomogeneous surface brilliance and understand demetallizations.

When Substrate or carrier substrate Any material is referred to, on or in which coding are or bring in, being under material, for example Plastic or Metal foils, laminates, papers, cardboard and textile fabrics to understand are.

Under Encoders are hereinafter in this description and in the Claims for fuse and coding understood with electrical, optical or magnetic effects.

The security features of the invention are made up of several different components, coding and electrically conductive layers, these under different Anord tion are connected to a carrier substrate. Layers of per se known electrically conductive polymers are used.

requirement for the Use of electrically conductive polymer layers in combination with a metallization layer is a significant difference between the surface resistances (≈ 100 kΩ / ☐), in particular, a very high electrical sheet resistance of the metallization layer demanded (≈ 200 kΩ / ☐). The usual market and technologies used for metallization achieve only minor Surface resistances.

Especially the coating by means of electrically conductive polymer, e.g. polyethylenedioxythiophene (PEDT / PSS) in combination with a metallization layer is as technological hurdle for counterfeiters too use, wherein the PEDT / PSS by a sheet resistance in the range of 15-100 kΩ / ☐. On PE films, using a primer, a sheet resistance of 50 kΩ / □.

The Polymer layer becomes planar or partially applied, preferably surface modulated or applied as a scattering pressure. Due to the partially changing Surface resistance arises a readable encoding. This in turn can be easily adapted to different Detect type, in particular by means of capacitive coupling.

Advantageous is a possible mechanical dual physical testing of the electrically conductive polymer PEDT / PSS, which on the one hand, the electrical conductivity, on the other hand, the optical Property detected for example in the IR range. The IR properties are with increasing wavelength (> 900 nm) as well as from Application weight or layer thickness effectively usable. By absorption and wavelength change measurable parameters are given. Through this double examination The likelihood of identifying counterfeits or the error rate of unrecognized forgeries or even the Error rate of genuine as counterfeit detected products significantly reduced.

A to be used according to the invention metallized surface - in particular with high brilliance, which would be expected to be a good electric conductivity has, which include an electrically conductive security feature could or even about yourself encoded surface resistance changes represents a safety feature - represents another hurdle for one counterfeiter because the task, function and mode of action of the metallized area neither suspect nor obvious.

in the In particular, the invention relates to security features, preferably for sealing, wrapping, Lock in and welding of documents - below Seals called, to identify their originality by authorized supervisory bodies. The seals are made of substrates out of area or streussaft metallized applications with a defined sheet resistance and of electrically conductive polymers, also with a defined Sheet resistance. According to the invention is the sheet resistance the areal or scattered metallized applications greater than 200 kΩ / □, and the sheet resistance of electrically conductive polymers is of an order of magnitude from 15 to 100 kΩ / □. The difference between the surface resistances of Applications and the electrically conductive polymers is greater than 100 kΩ / □. This type of sealants according to the invention becomes associated with documents.

Of the Structure of the seals - so the arrangement of substrates, electrically conductive polymers, areal or scattered metallized applications, protective coatings, release agents and / or adhesive layers - is depending on the chosen, where the individual layers are interchangeable. As a release agent find preferably siliconized layers or transfer belts or layers application.

ever according to intended use and applied manufacturing technology Primer used, wherein the primer serve both as a primer as well as according to the invention for smoothing coated substrates are suitable.

The electrically conductive polymers that metallized areally or streuhaft Applications, the substrates, possibly also the protective layers and the primers are arranged according to the invention as coding means so that their electrical or optical or magnetic effects can be detected by means of capacitive coupling, that is as coding Find application.

According to the invention is also provided, the electrically conductive polymers partially or area modulated or partially-area modulated apply. Also for In this case, a coding resulting from this can be detected capacitively. Also partial or surface modulated or partially-area modulated applied areally or streuhaft metallized applications are as coding means Capacitive coupling detectable.

The according to the invention to be used electrically conductive polymer is preferably a Polyethylendioxythiophenpolystyrolsulfonat (PEDT / PSS).

A particular embodiment of the invention provides subcomponents to assemble into a seal. The individual subcomponents can - as already described - off Substrates, of planar or streufaft metallized applications and electrically conductive Polymers exist, with the individual sub-components also consist of protective layers, release agents, adhesive layers and primers can. The selection and arrangement of the individual layers depends on the desired Use and after the processing technology. different Surface resistances of individual Layers in the subcomponents are also in the area of Invention. The same or manufactured with different structure Subcomponents yield for alone or after their connection to a seal encodings. If encodings are formed by the assembly of subcomponents, so their tailor-made packaging is an essential requirement.

The Invention will be described below with reference to the drawings embodiments explained in more detail and described.

The Drawings show:

1a : Schematic representation of a portion of a seal

1b : Part of a seal with coding shown schematically

2a - 2c : Schematic layer structure of different variants of sealants

3a - 3c : Further coding variants of seals

Example 1:

A seal according to the invention 1 is in the 1a shown schematically as a section. It essentially contains a substrate 10 , an areal or scattered metallized application or application layer 13 and an electrically conductive polymer 12 with a sheet resistance of the order of 15-100 kΩ / □, the difference between the sheet resistance of the surface or scattered metallized layer 13 and the sheet resistance of the electroconductive polymer 12 greater than 100 kΩ / □. The layers are optionally interchangeable. 1b shows the substrate 10 with a laminar metallized layer 13 with a sheet resistance greater than 200 kΩ / □, wherein a human visually invisible electrically conductive polymer 12 - a Polyethylendioxythiophenpolystyrolsulfonat - an identification number 20 and a security marker 21 represents.

Example 2:

2a represents another variant of a seal 1 dar. A substrate 10 is with a primer 11 smoothed. On this is the electrically conductive polymer 12 which in turn, if necessary, with a primer 11 is provided. This is followed by the metallized layer 13 and if desired by application, a final protective layer 14 , wherein also between the metallized layer 13 and the protective layer 14 a primer 11 may be required. On the protective layer 14 can also be a colored paint - in the 2a not shown - be applied for optical finishing. It is also conceivable that the protective layer 14 consists of such a lacquer layer. The location of the electrically conductive polymer 12 can with the metallized layer 13 be reversed. The used primers 11 can each act as a bonding agent. In addition contains the seal 1 an adhesive layer 15 for connection to documents. Be the documents in the seal 1 introduced - for example, by a film as a wrapper of the documents welded, pressed or sealed - can on the adhesive layer 15 be waived. Because the seal 1 is usually wound on rolls, it makes sense to have a side of it with a release agent 9 , in particular a silicone film to provide. As a separating agent 9 can the seal 1 also with a transfer ribbon 16 ( 2c ), wherein the transfer belt 16 adjustment means 8th For example, perforations, magnetic tracks or optical marks for the positionally accurate application of the seal 1 on the document contains.

A modification to this is in 2 B shown. The substrate 10 is coated on both sides, being on one side of the substrate 10 an electrically conductive polymer 12 and on the other side the metallised layer 13 located.

Another variant in which the seal 1 from two subcomponents 30 ; 31 exists, shows 2c , The subcomponents 30 ; 31 seal, encase or close documents, and wrap documents such as ID and ID documents. The one subcomponent 30 consists of a substrate in addition to other layers 10 and the electrically conductive polymer 12 and the other subcomponent 31 essentially from a substrate 10 and the metallized layer 13 , Depending on the intended future use and on the technological possibilities, the essential layers of the subcomponents are 30 ; 31 interchangeable, and the subcomponents 30 ; 31 are connectable in different places.

Example 3:

In a further embodiment of the sealing 1 or a subcomponent 30 ; 31 is the electrically conductive polymer 12 applied surface modulated. The 3a illustrates the schematic structure of a portion of a seal 1 or a subcomponent 30 ; 31 , Due to the different application thickness and the resulting changing surface resistances, a coding results. In this embodiment, the modulated sheet resistances represent a specific coding. (For this 3a )

Example 4:

This example describes a seal 1 or a subcomponent 30 ; 31 similar to that described in Example 4, wherein the electrically conductive polymer 12 partially applied. As in 3b shown, the partial orders of polymer 12 partially changing surface resistances, which in turn serve as codes.

Example 5:

Varying from Examples 3 and 4 is based on the 3c another embodiment of the seal 1 or a subcomponent 30 ; 31 presented. The electrically conductive polymer 12 is partially applied, and the respective sections of the partial orders are applied surface modulated. Due to the thereby partially changing surface resistances, a coding is produced, which represents the manufacturer and the date of manufacture, and a coding is produced by the surface-modulated sections.

Example 6:

According to this embodiment, one or more codes are combined according to the examples 3, 4 and / or 5 proposed, wherein these are realized in different surface directions. For example, the electrically conductive polymer 12 Partially surface-modulated in one surface direction - see Example 5 - applied and partially in another surface direction - see Example 4 - applied, with different codings in both directions.

Example 7:

In a further embodiment of the seal 1 or a subcomponent 30 ; 31 becomes a primer 11 like the electrically conductive polymer 12 in, Examples 3 to 6 partially or surface modulated or applied partially-surface modulated. The resulting structure of the primer application 11 transfers as master structure to the applied layer of electrically conductive polymer 12 and / or a metallized layer 13 , The result is codings as described in Examples 4 to 6.

Claims (21)

Security features, preferably for sealing, wrapping, enclosing and welding documents, for identifying originality, consisting of substrates ( 10 ), of areally or loosely metallized applications ( 13 ) with a defined surface resistance and of electrically conductive polymers ( 12 ) with a defined sheet resistance, wherein the difference between the surface resistances is greater than 100 kΩ / □ and in the seals ( 1 ), for example identity and identity documents are welded. Security features according to claim 1, characterized in that the surface resistance of the areally or scattered metallized applications ( 13 ) is greater than 200 kΩ / □. Security features according to claim 1, characterized in that the sheet resistance of electrically conductive polymers ( 12 ) is on the order of 15-100 kΩ / □. Security features according to claim 1, characterized in that one or more substrates ( 10 ), electrically conductive polymers ( 12 ) and planar or scattered metallized applications ( 13 ) are arranged selectively interchangeable. Security features according to claim 1, characterized in that the seals ( 1 ) optionally protective layers ( 14 ), Release agents ( 9 ) or adhesive layers ( 15 ) and these are arranged interchangeably. Security features according to claim 5, characterized in that the release agent ( 9 ) preferably a siliconized layer or a transfer tape ( 16 ) and with adjustment means ( 8th ), for example, perforations, magnetic tracks, optical marks or is equipped with their combination. Security features according to claim 1, characterized in that the seals ( 1 ) Primer ( 11 ), where primers ( 11 ) Substrates ( 10 ) smooth and serve as a bonding agent. Security features according to one or more of the preceding claims, characterized in that electrically conductive polymers ( 12 ), planar or scattered metallized applications ( 13 ), Substrates ( 10 ), Protective layers ( 14 ) and primers ( 11 ) are optionally arranged as coding. Security features according to one or more of previous claims, characterized in that the coding means with electrical and / or optical and / or magnetic effects are equipped. Security features according to one or more of the preceding claims, characterized in that the electrically conductive polymers ( 12 ) are partially or surface-modulated or partially-surface-modulated applied. Security features according to one or more of the preceding claims, characterized in that the sheet resistance of the electrically conductive polymers ( 12 ) is a readable, in particular by means of capacitive coupling detectable coding. Security features according to one or more of the preceding claims, characterized in that the planar or scattered metallized applications ( 13 ) are partially or surface-modulated or partially-surface-modulated applied. Security features according to one or more of the preceding claims, characterized in that the sheet resistance of the areally or scattered metallized applications ( 13 ) is a readable, in particular by means of capacitive coupling detectable coding. Security features according to one or more of the preceding claims, characterized in that the primers ( 11 ) are applied partially or surface modulated. Security features according to one or more of previous claims, characterized in that the electrically conductive polymer Polyethylendioxythiophenpolystyrolsulfonat (PEDT / PSS) is. Security features, preferably for sealing, wrapping, enclosing and welding documents, for identifying the originality as described in claims 1 to 15, consisting of several "subcomponents ( 30 ; 31 ), each of these subcomponents ( 30 ; 31 ) from substrates ( 10 ), of areally or loosely metallized applications ( 13 ) with a defined sheet resistance or of electrically conductive polymers ( 12 ) with a defined surface resistance or combinations of these and the difference between the surface resistances greater than 100 kΩ / || is and in from subcomponents ( 30 ; 31 ) joined seals ( 1 ), for example identity and identity documents are welded. Security features according to claim 16, characterized in that one or more substrates ( 10 ), electrically conductive polymers ( 12 ), planar or scattered metallized application (s) ( 13 ), Protective layers ( 14 ), Release agents ( 9 ), Adjustment means ( 8th ), Primer ( 11 ) and adhesive layers ( 15 ) optionally interchangeable and in different numbers in the individual subcomponents ( 30 ; 31 ) are arranged. Security features according to claims 16 and 17, characterized in that the subcomponents ( 30 ; 31 ) are arranged in the layer structure so that they are independent coding means and in the interconnected state the subcomponents ( 30 ; 31 ) contain other composite coding agents. Security features according to claims 16 to 18, characterized in that by the number, arrangement and / or geometry of the subcomponents ( 30 ; 31 ) contained substrates ( 10 ), electrically conductive polymers ( 12 ), planar or scattered metallized applications ( 13 ) and their exact matching to sealings ( 1 ) Coding means, for example as an identification number ( 20 ) and a security marker ( 21 ) are arranged. Security features according to one or more of the preceding claims 16 to 19, characterized in that the seals ( 1 ) and / or the subcomponents ( 30 ; 31 ) Coding means and are arranged partially or surface modulated or partially surface modulated. Security features according to one or more of the preceding claims 1 to 20, characterized in that the seals ( 1 ) and / or the subcomponents ( 30 ; 31 ) Coding means and these are arranged in different surface directions partially or surface modulated or partially-surface modulated.