DE102004026050A1 - security paper - Google Patents

Abstract

The invention relates to a security paper with transparent filled area for the production of documents of value, such as banknotes, checks, check cards, badges, stocks, comprising at least a first layer (1) of substantially non-transparent material, at least one through the first layer of substantially non-transparent material passing through the first opening (5), an at least partially transparent filling in the first opening (5) and means (3, 9) for in situ fixation of the filling. The invention also relates to a method for producing the security paper, its use for the counterfeiting of goods of any kind and a value document having a security paper according to the invention.

Description

The The present invention relates to a security paper and an under Use of the security paper produced value document, wherein the security paper or the value document a transparent filled area having. Under value documents are objects, such as banknotes, checks, Check cards, ID cards, shares, etc., to understand. The invention also concerns a method of making the security paper and its use for counterfeiting of goods of any kind.

It There are many ways Documents forgery-proof to make, for. Using watermarks, security threads, luminescent representations, Holograms, etc. All these security elements allow a skilled viewer, if necessary with the aid of suitable verification equipment, a largely reliable Distinction between real and forged documents. At fleeting Consideration or if the special security features of a value document the viewer are not known exactly how the z. In banknotes in normal payments or foreign currency is typically the case, can forgeries easily go unnoticed. The problem is aggravated by the modern color copiers, the value documents such. Eg banknotes, in amazing quality copy. In-system backups of the copier, a copying Banknotes are to be avoided without much effort.

Therefore An attempt was made to provide value documents with security elements. which are not copyable and whose forgery is also inexperienced or volatile Viewer noticed. It has begun to value documents with through openings provided, which were sealed with a transparent Mate rial. If such a value document is copied, the transparent one appears Area in the copy in the color of the background. A forger has to Cut out and reclose this area. This is difficult, in particular then, if additional Security elements are provided, both over the transparent area as well extend adjacent, non-transparent areas.

WHERE 95/10420 discloses a value document with an aperture which by means of an at least partially transparent cover sheet is closed. The cover film is attached so that they Breakthrough surmounted on all sides. Preferably, the carrier in the area covered by the film one corresponding to the film thickness Deepening on, so that the value document everywhere essentially the same thickness has. The cover film may have additional security features, as diffraction structures.

at the above Document have the openings in the substrate smooth edges. she can easily produced by cutting or punching the substrate. Such an operation can in principle also be carried out by a counterfeiter. To achieve better counterfeit security is proposed in WO 03/054297, the window opening during papermaking to produce a security paper is obtained in which the edge area of the window opening characteristic irregularities which subsequently can not be produced on the finished paper. The opening can be unilateral or bilateral with a security element projecting beyond the opening, as a transparent plastic film, be provided. In the area the bearing surface of the security element, the security paper preferably has one Deepening, so that a stepless surface is achieved.

in the Contrary to the value documents according to WO 03/054297 according to WO 03/097937 the visibility of irregular border areas from window openings just avoided. Therefore, the product according to WO 03/097937 at least one layer of fiber material with a through opening, the opening on at least one side of a partially transparent part The structure is covered. The structure is for example a printed one Patch with a plastic window or a transparent plastic film that contains partially opaque substances. The opaque areas of the patch or foil obscure the irregular edges of the Window opening. The structure may have multiple layers and additional layers Contain security elements.

all Security papers with continuous opening in the substrate material is common that the opening by means of an at least partially transparent film material is closed. The closure is one-sided or left and right; Alternatively, the film is between two layers of paper embedded or in the appropriate dimensions and inserted into the opening.

These known solutions to close the through openings while stabilizing the openings, However, they have disadvantages, some of them already immediately after the production of security paper and partly after a short time Use of security paper to come to light.

If the opening on both sides ver foils closed, a disturbing air entrapment can hardly be avoided. In addition, locally contacting films produce uncontrollable optical effects and wear out comparatively quickly. The accelerated wear manifests itself in a friction-induced loss of transparency (becoming blind) of the films.

Becomes the opening only one side closed by a film or is the film embedded between two layers of paper, the edges of the opening are at least on a surface of the security paper exposed and act as mud flaps. The episode is that the users of the security paper pluck at the edges of the opening and they damage you.

Becomes the foil in the opening used so that it fills these, although the problem of Thickness difference between the film and the surrounding area solved, but the security paper may no longer be subjected to significant deformation. Rolling or kinking of the paper, as is inevitable with a banknote is, leads quickly to a breaking out of the foil insert.

Even if breakage of the foil insert can be prevented z. B. by sticking another film on the insert and the the surrounding paper areas lead to strong deformations of the paper Security papers quickly damage and / or Contamination in the contact area between the edge of the paper and the edge of the Foil insert.

uncontrollable optical effects and blindness in the transparent area Foil as well as damage on the edges the opening make a continuous opening stabilized by transparent foil (s) as security element unusable, since in each case not readily apparent is whether deviations from the "ideal original" merely a consequence a defective reproducibility of the manufacturing process or of use-related changes of the security paper, or if they are an indication of the existence a fake represent.

task The present invention is therefore a suitable for the production of documents of value Provide security paper with a transparent filled area, the ones listed above Disadvantages are avoided. In particular, the transparent should Area forming filling stable and flexible, d. H. be flexible.

A Another object of the present invention is to use a provide the security document produced value document.

task In addition, the present invention is a process for production of the security paper.

Further An object of the present invention is the anti-counterfeiting device of goods of any kind by using the security paper.

These Tasks are solved through the objects with the characteristics of the independent Claims. Advantageous developments of the invention are the subject of the respective dependent Claims.

• – mindestens eine erste Lage aus im Wesentlichen nicht transparentem Material (im Folgenden als „Basispapier" bezeichnet),
• – mindestens eine durch die erste Lage aus im Wesentlichen nicht transparentem Material hindurchgehende erste Öffnung (im Folgenden auch als „Fenster" bezeichnet),
• – eine mindestens bereichsweise transparente Füllung in der ersten Öffnung, und
• – Mittel zur In-situ-Fixierung der Füllung.

The security paper or document of value according to the present invention comprises

• At least one first layer of substantially non-transparent material (hereinafter referred to as "base paper"),
• At least one first opening (hereinafter also referred to as "window") passing through the first layer of substantially non-transparent material,
• - An at least partially transparent filling in the first opening, and
• - Means for in situ fixation of the filling.

conditioned by the at least partially transparent filling has the security paper has at least one transparent area.

• – Bereitstellen mindestens einer ersten Lage aus im Wesentlichen nicht transparentem Material (Basispapier), das eine durch die erste Lage hindurchgehende erste Öffnung (Fenster) aufweist,
• – Füllen der ersten Öffnung mit einer mindestens bereichsweise transparenten Füllung oder mit einem Füllungssystem, das eine mindestens bereichsweise transparente Füllung ergibt, und
• – In situ-Fixieren der Füllung.

The method according to the invention for producing the security paper with at least one transparent area has the following steps:

• Providing at least one first layer of substantially non-transparent material (base paper) having a first opening (window) passing through the first layer,
• Filling the first opening with an at least partially transparent filling or with a filling system which results in an at least partially transparent filling, and
• - In situ fixation of the filling.

According to one Variant of the method according to the invention becomes the opening before placing the filling or the filling system on one side by a Öffnungsabdeckmittel locked.

The present invention finds particular application in the field of security papers or documents of value based on paper, preferably banknotes. However, as used herein, the term "security paper" is intended to broadly encompass products suitable for the manufacture of value documents, such as cartons or plastic sheet or board combinations of it.

In The following description will describe the at least one location in the Substantially non-transparent material commonly referred to as "base paper." It is understood that this material layer is preferably made of paper, However, it can also consist of other materials, for example made of a non-transparent plastic. The security paper can also be other layers of paper or other material, transparent or non-transparent, and with or without through opening (s), exhibit.

Arrangement, Number, shape and size of the through openings (Windows) are largely arbitrary, d. H. at most by the handling the base paper and possibly the other security paper layers.

The filling a window fills the window completely from, d. h., the base paper with the filled window has surfaces without Steps at the window edges on. The filling is at least partially transparent. It also can not be transparent Have areas, for example due to insertion of additional Security elements or by imprints. The filling thus consists of one Material that is transparent or at least translucent. Materials for both visible light as well Types of radiation as used for authenticity testing are highly transparent, are preferred. The filling should be be compatible with the base paper and should have its deformation properties do not negatively influence. For example, a banknote has to be rolled or can be folded without the filling Resist, damaged is or even breaks out of the window.

Further desirable Properties of the filling are good printability, dirt repellent properties, durability against embrittlement, discoloration and against moisture, aging resistance and scratch resistance. The filling should be preferred also the introduction of optical feature substances and / or the provision tactile characteristics (imprints, Reliefs).

One An essential feature of the invention is that the filling in situ in the opening is fixed. In situ fixation according to the invention means there are fixing means for fixing the filling provided, and the introduction the filling in the opening and their fixing take place substantially at the same time or at least timely, z. B. overlapping each other in time.

at the in situ fixation learns the filling material while or any one immediately after insertion into the window Kind of change permanent or temporary Art, for example, a chemical reaction or a partial or complete Phase transformation, such. B. Melting of patches at the edges. Thereby an intimate connection of the security paper is ensured with its window filling.

The Means for in situ fixation can be provided separately or they can with the filling or with the base paper, especially if it is a fiber material layer acts to form a unity.

in the The invention will be explained below using the example of a banknote. The However, the invention should not be so limited but is in general Article with through openings applicable, in particular to any type of security / value documents.

to Making the banknote (or other item) becomes first a base paper, typically of a fibrous material, having a through opening, a so-called window, provided. The base paper can already made with the window, or the window can later be cut or punched out. By cutting or punching receives one smooth edges. margins without sharp edges be prepared according to the methods described in WO 03/054297. The paper is made with a paper machine, at the paper screen with at least one elastic or movable mounted closure element, which is the attachment of paper pulp prevented in this area is provided.

Depending on the window filling system used and the way in which the filling is introduced, it may be expedient the window before the introduction of the filling by a covering means, for example, a heat-sealable film, to close one-sided.

When Films are suitable e.g. Polyolefin films (e.g., PE, PP, cycloolefinic Copolymers), their derivatives, polycarbonate, PMMA. Suitable adhesives for applying the films are e.g. Polyvinyl acetates, polyvinyl chloride derivatives, Acrylates, polyurethanes, polyesters, copolymers of these groups and UV adhesives.

If a stepless surface is desired, a base paper is used, which has a recess in the area of the bearing surface of the covering material which substantially corresponds to the thickness of the covering material. The recess may be created by compressing the base paper in this area prior to application of the cover material become. However, the recess can also be produced during papermaking by the sheet formation in the immediate vicinity of the opening prevents, but not prevented, and thus a thinner spot is formed in the paper. This is described in WO 03/054297. Alternatively, the recess can also be produced by calendering.

The Covering material can also cover the base paper on one side of the entire surface.

Subsequently, will the filling brought in. Suitable filling systems are low in solvents or preferably solvent-free, d. H. 100% systems. Systems that contain solvents or are aqueous can be applied only in a limited layer thickness, since it at the fast drying can come to cookers (bubbles), so that the achievable layer thickness for complete filling of the window possibly not enough. However, 100% systems can be applied reliably in the required layer thickness become.

suitable Method of introducing the filling are printing methods, in particular those with which a targeted bigger amount of the filling system can be introduced, for. As screen printing, or methods that the filling system by introducing a kind of dosing syringes. Screen printing is special suitable because placed on running train a considerable filling system amount can be printed. Gravure is also possible, but less favorable, as usually several printing passes necessary and the cell emptying in the window area is difficult. Well suited are inkjet processes. In the roll-to-roll process, you can Spray nozzles, the z. B. are arranged on a roller can be used. in the Sheet pressure must be for every one to fill Window has its own spray nozzle used for readjustment to the exact window position preferably additionally via a should have optical control.

Also all common ones Coating method, e.g. all roller coating, knife coating, roll doctoring, Luftbürste- or air knife swipe, curtain swipe, film press order and Sprühstreichverfahren as well as nozzle application, can be used advantageously. For example, squeegees or blades can be used be to the filling system entire area applied. By principle, areas of the banknote, the a greater distance to the application tool, d. H. the window areas, a higher layer thickness. However, here is the entire banknote at least in strips coated.

The in the case of the above-mentioned introduction procedures or order procedures used filling systems have to have a suitable rheology to be sprayed or painted on to be able to. Furthermore At least in the case of printing processes, they should go well own, because the exact position of the windows production-technical fluctuations subject.

It can both one-component systems and multi-component systems for use come.

suitable One-component systems are, for example, polymer melts, lacquers (preferably as 100% systems) and moisture-curing polyurethanes.

at The polymer melts are generally thermoplastics and elastomers to mention, in particular cycloolefinic copolymers, polymethylmethacrylate (PMMA), characterized by high colorlessness and pronounced transparency characterized, copolymers of methyl methacrylate, polycarbonates (PC), Polypropylene (PP), polyethylene (PE), rubber such. Butyl rubber, Ethylene-vinyl acetate rubber.

When Paints come radiation-curing, in particular radically or cationically by UV (ultraviolet curing) or ESH (electron beam hardening) curing lacquers in question, and besides free-radical or cationic by UV or ESH curable adhesives.

suitable Multi-component systems are in particular two-component (2K) systems. Preference is given to silicones such. B. transparent "bathtub silicone", epoxy resins, z. B. amine or acid curing epoxy resins, 2K laminating adhesives, and polyurethanes are particularly advantageous. The polyurethanes will be for example, by a polyester polyol or polyether polyol as first component and a polyurethane prepolymer solution or an oligomer with two or more isocyanate groups as a second component.

The filling systems are during the Introduction in the liquid or at least flowable state. Due to the good mobility of the filling systems they come in intimate contact with the means for in situ fixation, d. H. the cover and the window edges. With the chosen Window-filling material easily bondable film materials and irregular window edges favor one strong in situ fixation of the filling. Suitable easily bondable film materials are e.g. by etching, primer or corona-pretreated films, in particular made of PET, PE, PP or Polyolefins. Alternatively, films suitable e.g. through the filling material are swellable, e.g. Polycarbonate, PMMA, PVC.

It is desirable that after filling the window can be processed quickly. Since the production processes take place at very high speed, the filling systems must become tack-free very quickly, ie the property of adhering to other surfaces must be rectified immediately after the introduction or application of the filling system. Otherwise it can lead to a blocking, ie a sticking, of the materials. Radiation-curing systems and so-called dual-cure systems, in which a radiation curing and a thermal after-reaction takes place, can usually be obtained tack-free and non-blocking. In 2K systems, however, it is very difficult to achieve tack freedom immediately after the window fill station. In principle, the tack can also be reduced or avoided in the case of 2K systems by the use of antiblocking additives. On the other hand, two-component systems have the advantage of high flexibility that can be achieved, which is indispensable, in particular, for products such as banknotes, which are regularly subjected to pronounced deformations during use.

Around even with insufficient fast tack-free filling systems To prevent blocking, after its application, a block-solid Material are applied. This can be a block-resistant paint layer be applied to the not tack tack window filling. The Lacquer layer may be constructed on any basis, e.g. NC-based Paints, vinyl chloride / vinyl acetate copolymers (also possible crosslinking), aqueous Dispersions, also cross-linked and / or radiation-curing, UV varnishes, as far as they are concerned is transparent and hardening or Crosslinking the filling not impaired. Alternatively, a film may be applied, for example without laminated on another adhesive. This slide can be used later, though the filling tack free, be deducted again or even on the banknote remain.

If the film is to be peeled off again, it is advisable to use a the chosen one restorative not easily bondable film material, for. As polyethylene, polypropylene or polyethylene terephthalate. Alternatively or additionally the film with release layers, such. As waxes or silicones, be equipped. As a release layer can also be a silicones staggered UV varnish can be used. The foil is allowed to react the filling do not interfere. If it is removed again after tack free, she does not need to be transparent.

If The film is not peeled off again, its optical properties no disturbing effects in particular, do not reduce transparency. The combination Foil / filling material is expediently chosen so that a good connection between foil and filling is achieved. For the flexible Lamination of PET films, for example 100% polyurethane laminating adhesives (Rohm & Haas) can be used. The foil is placed so that at least the filled window is covered. Is the film over the edge of the window over, It is preferable that they are over a heat sealable equipment has and is glued to the paper under pressure and temperature. If a stepless surface he wishes is, in the region of the bearing surface of the film, a recess be provided in the paper, as explained above for the cover.

The Application of a film or lacquer layer after application of the filling system often useful if the filling system is block-free, for example in soft systems as scratch-resistant Protective layer or to provide the banknote with additional features, which can be provided in the film or lacquer layer.

The acting as a protective layer, scratch-resistant lacquer layer can a radiation-curing 100% system (eg, radically or cationically UV or EBC curable) or a system Solvent-based, For example, nitrocellulose, polyamide, PVC copolymers, or a Water-based system, for example, generally dispersions, emulsions, in particular Acry late, styrene acrylates, polyurethanes, but also a radiation-curing System, be. Also PMMA and PC systems with longer chain length are conceivable.

The window panel Can be used for additional Security features are used before or if necessary also simultaneously with the introduction of the filling system in the window be attached. For example, feature substances, Luminescent substances, Lisa dyes (light-harvesting dyes, the a light leak on particularly embossed structures of the window effect), a thermochromic finish, photochromic dyes, Melierfasern, absorber for X-rays or general ionizing radiation (for machine readability). Also Polarizers, holograms, tactile features, such as Imprints in Braille or other imprints, and filters of different wavelengths can be provided.

As well can the cover layer and / or the protective layer having such features be equipped.

When choosing the filling system and the layers covering the filling if necessary, take into account that transparency for all types of radiation used for the detection of the window be used, is ensured. The hardness must be adjusted so that the printing processes to be used in the window area are not disturbed.

alternative to the above Cover the window with a foil before inserting the filling system can the filling the window even without cover or with a paint layer as Covering done. A variant in which during the filling of the window, a covering may be present but need not exist, is that the banknote paper with a polymer film or a transfer film to be happy and from the polymer film or transfer film with a hot stamp a piece of polymer, its edges when patching melt or at least so far soften that a good in situ connection to the banknote and, if necessary, too the cover sheet is achieved, separate and as window filling apply. As a stamp can also be a suitably shaped, heated Press roll act. Suitable fillings for this purpose are in particular the thermoplastics, e.g. EVA, styrene acrylates, PET, PA, PUR, PP, PE, cycloolefinic copolymers which in the softened state a good flowability own and therefore ensure a good in situ fixation.

According to one Another variant, the paper with the window to be filled on a support, for. As a roller, arranged, the window with the filling system filled, and the paper with the filled Window solved after reaching the required hardness of the carrier. roller and filling system have to be coordinated so that the filling system on the roller only a little bit liable. Generally suitable are rollers with Teflon coating. After peeling off from the roller, a paint layer or a film, if desired with security elements, be applied.

alternative For example, the roller, or generally the carrier, may be part of a paint applicator be, with the roller over its entire surface, placed or with motifs, wearing a paint film that is parallel to the window fill, but is applied from the opposite side. Here, the in situ fixation takes place on the edges of the window and the paint film.

In the variants described so far for filling the window openings, the correct placement of the filling systems in the window openings is solved in terms of plant technology. Other methods do not require locally as precise as possible implementation of the window filling. These include the following embodiments of the method according to the invention:
In one embodiment, the covering film which closes the window on one side is selectively electrostatically charged in the region of the window opening. The charging can be done, for example by friction or by applying current to the support surface on which the substrate to be flocked, and the selective charging is achieved by appropriate coordination of humidity and paper moisture. Then the film is subjected to a flocking process with the window filling system from the paper side, wherein the window attracts the flakes, which may optionally have an adhesive. Excess flakes are removed, for example by blowing off. Then heat is generated to melt the flocking mass. The heat can be generated by any dryer, preferably a dryer that generates little turbulence, or by an IR radiator or a microwave dryer. The flocking compound may be, for example, a powder coating, in particular epoxy resins, polyester resins, mixtures of epoxy resins and polyester resins, or else acrylates, PUR, UV-curing powder coatings.

Succeed It is not, electrostatically charge the film so that only the Window area is filled with flocking compound, the reflow process needs location-dependent occur. Then the cover for the one-sided closure of the window chosen that for used the melting process and optionally the crosslinking process Radiation penetrates the film (only the film) unhindered and the flocking compound in the window area melts, leaving them with the edges the window opening and connects with the cover sheet in situ. Alternatively, a very thin Cover film can be used, which is much faster than the thick banknote paper heats up and so also to a location-dependent Schmelzpro process leads. When the windows are filled are, is the excess flocking mass removed, for example by blowing off, vacuuming, washing or by electrostatic or mechanical removal.

Instead of a flocking of the window opening one-sided closing Cover film can also be used a flocked transfer film. Of the Transfer takes place only where the flocking mass activates is, for example, by heat. The Flocked transfer film can also have an activatable adhesive on the surface have the flocking. Conversely, the adhesive can also be applied to the closing the window on one side Covering be applied. When placed in the window pane flocked transfer film can transfer through full-surface heat or by heat only be effected in the window area. If the transfer film is not flocked, the transfer should be through selective heat exposure only be effected in the window area.

Instead of flocking, the transfer film can also carry fusible particles, either by radiation or by a hot stamp or can be activated by a suitably shaped pressure roller and can be transferred into the window.

Further embodiments use foamed or foamable Films. In the case of a foamed Foil is this expediently analogous to a lead strip over applied to the window. Then the film is pressed flat, for example by calendering under heat. In the window area, the foil can dodge and the window is full fill out, because she is not pressed here. Conversely, can also be a foamable film be applied to the paper, which is foamed only in the window area, for example by activation by heat radiation selectively in the pane, and then fill in the window. The remaining areas the foamable Can slide dried to prevent inadvertent foaming prevent. This can be done for example by calendering.

Also an extrusion coating pressed into the window opening is conceivable. For example, a melt is forced through a nozzle with a screw. In a slot nozzle a film can be placed over the substrate according to a foil and with be connected to him.

at the embodiments the window filling, where the window is not necessarily one-sided by a cover is closed, as in the punching of the filling of a polymer film or a transfer film, when window filling on a support, of the paper later is removed again in the window filling by means of a flocked transfer film or a meltable bead or other fusible particles carrying transfer film, recommends It is, for secure fixation of the filling in the window opening either Nevertheless, make such a one-sided window cover or subsequently, d. H. after filling the window opening, at least one side to apply a film or a lacquer layer. If no fixing foils or coatings provided be, the fixation in the window opening itself must be particularly strong and be durable. Such a reliable fixation can by irregular window borders, like she is windowing during the Paper production according to the in WO 03/054297 disclosed methods, guaranteed become.

The Security paper can be multi-layered, d. H. it may be from the base paper with a first window and one or more additional ones Layers of the same or different material as the base paper, with or without windows. Preferably, the others exist Layers of the same material as the base paper and have windows on, which are arranged so that they share the first window a window passing through the first and further layers form. The second and possibly further windows can have a different dimension own as the first window. In case of partial overlapping of the windows arises a filling, partly completely transparent and partly opaque appears. Totally or strongly overlapping Windows are preferably filled in one operation. at only slightly overlapping Windows may be more advantageous for a separate introduction of the filling.

The Window filling according to the invention prevented contamination in the edge of the window, prevents air pockets between the films covering a window create flat surfaces and therewith an unrestricted overprintability of the pane, and takes care of an increased Stability in Kinking or bending due to stress and stress compensation.

Optionally, to prevent embrittlement of the fillers, plasticizers may be incorporated into the fill systems or inherently soft systems, ie low glass transition temperature systems, may be employed. For example, in 2K systems, a low glass transition temperature can be achieved by choosing systems that preferably result in linear chain extension, e.g. B. systems with two functional groups per component can be achieved. However, the inherently soft systems are often sensitive to scratching, in particular 2K systems immediately after application. This problem can be easily solved by overcoating with a thin lacquer layer or by laminating a thin film, wherein the window filling can act as a laminating adhesive. If the fillings are sensitive to scratching for a short time, the film can be peeled off again later, thus acting only as a temporary protective film. Stability to moisture can be achieved, for example, by choosing an insensitive filling system (eg 100% systems such as epoxy, dual cure, silicone, thermoplastic melt) by complete reaction of reactive groups or by an additional barrier layer. Good overprintability can be achieved by eliminating additives that would greatly reduce surface energy. In addition, the printability can be improved by suitable primers, corona, corona in conjunction with primers, flame treatment and by the use of suitable coextruded films. The fillings should also be dirt-repellent, which is contrary to the demand for good printability. The coordination of printability and dirt-repellent properties can be achieved with a corresponding coating, for example, according to WO 00/00697. To effectively counteract possible damage and kinking, self-healing systems, ie soft systems, which can be reused in the original form over relatively long periods of time. The security paper according to the invention can be further processed into any desired value documents. It can also be used in the field of product protection for counterfeiting of any goods.

A Increase in counterfeit security will scored when the transparent area with other security elements combined, for example, when he is in the range of a watermark is arranged or if he simply overprinted with a pattern which also covers adjacent paper areas.

The Invention will now be described with reference to figures and specific embodiments explained. Figures and examples should by no means be construed as limiting the invention become.

In show the drawings:

1 a section through an embodiment of a security paper according to the invention,

2 a section through another embodiment of a fiction, contemporary security paper,

3 a section through a further embodiment of a security paper according to the invention,

4 a section of a value document according to the invention in supervision,

5 a section through an embodiment of a security paper according to the invention.

1 shows a security paper according to the invention, consisting of a base paper 1 with a through opening 5 and a cover sheet 3 , The opening 5 has irregular edges 9 which are a good in situ fixative for the filling in the opening. In addition, the filling is fixed to the cover layer 3 that the opening 5 covering and on the opening 5 surrounding edge areas of the security paper 1 is laminated.

2 shows a further embodiment of a security paper according to the invention in section. The security paper of this embodiment consists of a base paper 1 with a region of lesser thickness 7 in which there is a continuous opening 5 located. Due to the area of reduced thickness 7 are located on both surfaces of the base paper 1 in the area surrounding the opening recesses. A recess takes the opening 5 one-sided covering layer 3 on, and the other recess takes a protective layer 4 on. The thicknesses of the cover layer 3 and the protective layer 4 correspond respectively to the depth of the recesses. Therefore, results for the security paper on both sides a flat surface.

3 shows a further embodiment of a security paper according to the invention in section. The security paper according to 3 is double-layered, ie it has a base paper 1 and another paper layer 2 on. The base paper 1 has a first opening 5 , and the more paper layer 2 has a second opening 6 , The first opening 5 is larger than the second opening 6 and has irregular edges 9 as they emerge by forming the opening during papermaking, while the second opening 6 has smooth edges, as they are created by punching. Such a "combination window" can be obtained, for example, by merging a base paper 1 with a first opening 5 with a paper layer without opening, and punching the second opening 6 after unifying the two paper layers. The paper layer 2 has an area of reduced thickness in the embodiment shown here 8th on, in the middle of the second opening 6 is punched. The "combination window" 5 . 6 is by a laminated cover layer 3 covered, the dimensions of which correspond to the dimensions of the well, through the region of reduced thickness 8th is produced. The security paper is therefore on the side of the paper layer 2 a substantially flat surface. At the side of the base paper 1 the surface has a thin layer of varnish 4 which completely covers and protects the security paper. The introduction of the filling takes place in a window which is composed of several individual windows, preferably in one operation.

4 shows a section of a value document according to the invention in a plan view. The document of value has six through openings 5a to 5f which are in a sense context (here the value of the bank note). A security thread 10 extends through both the base paper 1 as well as through five of the six through openings. By means of this combination of security elements, the transparent windows on the one hand and the security thread passing through both transparent and non-transparent areas on the other hand, a high degree of protection against counterfeiting is achieved.

5 shows a further embodiment of a security paper according to the invention in section. The security paper of this embodiment consists of a single or double-layer base paper 1 , in which the cover foil 3 how a double-sided window thread is embedded. The foil is so say embedded in the base paper, with through openings 5 in the base paper on opposite sides of the film are present. The through openings are closed on both sides with a suitable filling (not shown).

following Examples are for the production of banknote paper according to the invention stated:

Example 1:

On one roll of banknote paper with windows at regular intervals (window spacing) from bow to bow: 1.5 times). The windows are with a heat-sealable Foil, e.g. PET, PP, PE, polyamide or polycarbonate, in the form a strip closed. If transverse to the train z. Eg 6 windows are present, 6 film strips are needed. These must each slight be wider than the widest window to be sure To allow closure.

On the opposite side of the web, a flexible UV varnish (viscosity at 20 ° C about 2000 mPas) is printed by screen printing in the windows. (Amount for 1 cm ² window about 10 mg). The screen printing cylinder must map the geometrical arrangement of the windows on the web (including arch jump, see above). The UV varnish is cured by UV radiation after a suitable course (tempered about 80 ° C, about 3 m in length, depending on the web speed and viscosity). With a suitable formulation, a tack-free product is obtained immediately. The paint formulation contains photoinitiators that do not contribute much to the yellowing. Examples are: Irgacure 184 (general class of compounds α-hydroxyketones) and Irgacure 819 (advantageous for thick layers, general class of compounds BAPO bisacylphosphine oxide). In this example, amine-modified polyester acrylates are used as prepolymers (relatively good flexibility, low oxygen inhibition). In addition, the required viscosity is adjusted by reactive diluents (usually used reactive diluents: TPGDA tripropylene glycol diacrylate) and thickeners (eg polyurethane thickener, aerosils ...).

Example 2

On one roll of banknote paper with windows at regular intervals (window spacing) from bow to bow: 1.5 times). The windows are with a heat-sealable Foil (equipment that allows electrostatic charging) in Form of a strip closed (if, for example, across the track 6 windows are present, 6 film strips are needed. These must each slight be wider than the widest window to ensure a secure closure to enable.

The Film is electrostatically charged (eg by friction). The Humidity and paper moisture are chosen so that the film is selectively charged becomes. The web is coated with fusible flocs, e.g. made of PE or PA, flocked (from the opposite side, so that the window is filled). These flakes can wear an adhesive. The flakes are attracted to the windows; The web is made by carefully blowing off misdirected flakes freed. By IR irradiation, the flakes melt and form the window filling. This window filling is protected with a protective varnish (eg NC varnish, UV varnish).

The obtained according to Example 1 and 2 papers show significantly reduced Soiling tendency at the hole edges. The foil is just extreme difficult to peel off. Due to the constant layer thickness of the papers also in the hole areas There are no preferred kinks for damage, so the papers can be easily bent. In addition, there is also an improved flatness in the area of the hole.

Claims (41)

Security paper with transparent filled area for the production of value documents, such as banknotes, checks, check cards, identity cards, shares, comprising: - at least one first layer ( 1 ) of substantially non-transparent material, - at least one through the first layer ( 1 ) of substantially non-transparent material passing first opening ( 5 ), - an at least partially transparent filling in the first opening ( 5 ), and - means ( 3 . 9 ) for in situ fixation of the filling. Security paper according to claim 1, characterized in that it has at least one further layer ( 2 ) of substantially non-transparent material having a second opening ( 6 ), which passes through the further layer and is filled with an at least partially transparent filling, wherein the first and the second opening overlap each other and have different sizes and / or different shapes. Security paper according to claim 1 or 2, characterized in that the first and / or optionally the further layer in the region of the first and / or optionally the second opening a region ( 7 . 8th ) has reduced thickness. Security paper according to one of claims 1 to 3, characterized in that the first layer ( 1 ) and / or optionally the further situation ( 2 ) consists of fiber material. Security paper according to one of claims 1 to 4, characterized in that the means for in-situ fixation of the filling a the first or possibly the second opening on one side covering transparent cover layer ( 3 ) are. Security paper according to one of claims 1 to 5, characterized in that the means for in situ fixing of the filling in the first and / or optionally the second opening protruding fibers ( 9 ) of the first layer ( 1 ) and / or, where appropriate, the further situation ( 2 ) are. Security paper according to one of claims 1 to 6, characterized in that it has a first or optionally the second opening on one side covering, transparent protective layer ( 4 ) having. Security paper according to one of claims 5 to 7, characterized in that the cover layer ( 3 ) and / or the protective layer ( 4 ) is a film or a paint film. Security paper according to one of claims 1 to 8, characterized in that the filling in the first opening ( 5 ) and optionally in the second opening ( 6 ) is a solvent-free or low-solvent system. Security paper according to one of claims 1 to 9, characterized in that the filling in the first and optionally in the second opening is a one-component system. Security paper according to claim 9 or 10, characterized characterized in that the filling a thermoplastic or an elastomer. Security paper according to claim 11, characterized that the filling selected is from the group consisting of polymethyl methacrylate, copolymers of methyl methacrylate, polycarbonates, polypropylene, polyethylene, Rubber and moisture-curing polyurethane. Security paper according to one of claims 1 to 9, characterized in that the filling is a multi-component system, preferably a two-component system. Security paper according to claim 13, characterized that the filling is selected from the group consisting of two-component laminating adhesives, epoxy resins, preferred amine or acid hardening Epoxy resins, and silicones. Security paper according to one of claims 1 to 9, characterized in that the filling is a thermoplastic, or a crosslinking or non-crosslinking, or a radiation-curable Powder paint is. Security paper according to one of claims 1 to 9, characterized in that the filling is a foamable or a frothed System is. Security paper according to one of claims 1 to 16, characterized in that the filling and / or optionally the cover layer ( 3 ) and / or, where appropriate, the protective layer ( 4 ) has optical security elements and / or tactile features. Value document, such as a banknote, a check, a Bank card, a badge, a share, characterized in that it has a security paper according to one of claims 1 to 17. Use of a security paper according to one of claims 1 to 17 or a value document according to claim 18 for the protection against counterfeiting of goods of any kind. Method for producing a security paper with a transparent filled area, comprising the following steps: - providing at least one first layer ( 1 ) of substantially non-transparent material, one through the first layer ( 1 ) passing first opening ( 5 ), - filling the first opening ( 5 ) with a filling system which results in at least partially transparent filling, and - fixing the filling system in situ by fixing means ( 3 . 9 ). Method according to claim 20, characterized in that at least one further layer ( 2 ) is provided from substantially non-transparent material, wherein the further position ( 2 ) passing through a second opening ( 6 ) having. A method according to claim 20 or 21, characterized in that the first or possibly the second opening before filling with the filling system on one side with a transparent cover layer ( 3 ) is covered. Method according to claim 22, characterized in that that for the one-sided covering of the first or possibly second opening a transparent Plastic film is used. A method according to claim 20 or 21, characterized in that the step of filling is performed so that the first or possibly second opening is covered on one side at least during the filling process. Method according to Claim 24, characterized that covering on one side by a temporary carrier, preferably a roller, takes place, the carrier removed after the filling step becomes. A method according to claim 25, characterized in that the temporary carrier with a transparent cover layer ( 3 ) is provided for the first or optionally second opening, wherein the transparent cover layer ( 3 ) remains after removal of the temporary carrier on the first or optionally second opening. A method according to claim 26, characterized in that as a transparent cover layer ( 3 ) a film or a paint film is used. Method according to one of claims 20 to 27, characterized that the filling system by a printing method or by a coating method by a screen printing or inkjet process, in the first and / or optionally the second opening is introduced. Method according to Claim 28, characterized that as a filling system used a one-component system or a multi-component system becomes. Method according to one of claims 20 to 27, characterized that the filling system by placing a polymer film or a transfer film on the first or optionally the second opening, punching a piece of polymer more suitable Dimensions and melting of the polymer piece introduced into the first and / or optionally second opening becomes. Method according to one of claims 22 to 27, characterized in that the filling system by flocking the cover layer ( 3 ) or a temporary covering of the first or optionally second opening with filling system material inside the first and / or optionally second opening, then melting or hardening of the filling system by heat or radiation, optionally followed by removal of the temporary cover. Method according to claim 31, characterized in that that the flocking is unselective and the melting or hardening of the filling system site-specific only in the area of the first and / or if necessary second opening he follows. Method according to claim 31, characterized in that that flocking selectively essentially only inside the first and / or optionally second opening takes place, and if desired the melting or hardening of the filling system location-specific not only in the area of the first and / or if necessary second opening he follows. Method according to one of claims 20 to 27, characterized that the filling system by placing a flocked with the filling system or fusible particles of the filling system carrying transfer film, and melting the filling system by heat or radiation is introduced, wherein in the case of a selectively in the opening area present flocking or particle arrangement, the melting if desired unspecifically. Method according to one of claims 20 to 27, characterized that the filling system by applying a foamed Foil on the first or possibly second opening having Security paper layer made of non-transparent material, followed from calendering the film is introduced. Method according to one of claims 20 to 27, characterized that the filling system by placing a foamable Foil on the first or possibly second opening having Security paper layer made of non-transparent material, followed from foaming the film by heat or radiation selectively in the range of the first and / or optionally second opening is introduced. Method according to one of claims 20 to 27, characterized that the filling system is introduced by extrusion coating. Method according to one of claims 20 to 37, characterized in that after filling of the first and / or optionally second opening a cover layer ( 4 ), preferably a block-resistant cover layer ( 4 ) is applied. A method according to claim 38, characterized in that as cover layer ( 4 ) a transparent tack layer is used. A method according to claim 38, characterized in that as cover layer ( 4 ) a transparent film is used, which is preferably laminated without adhesive. Method according to one of claims 38 to 40, characterized in that the cover layer ( 4 ) after reaching tack free of the filling Will get removed.