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EP2430237B1 - Couche réceptrice d'encre pourvue d'un évidement - Google Patents

Couche réceptrice d'encre pourvue d'un évidement Download PDF

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Publication number
EP2430237B1
EP2430237B1 EP10718994.6A EP10718994A EP2430237B1 EP 2430237 B1 EP2430237 B1 EP 2430237B1 EP 10718994 A EP10718994 A EP 10718994A EP 2430237 B1 EP2430237 B1 EP 2430237B1
Authority
EP
European Patent Office
Prior art keywords
printing
substrate
ink
region
layer
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.)
Not-in-force
Application number
EP10718994.6A
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German (de)
English (en)
Other versions
EP2430237A2 (fr
Inventor
Ralf Liebler
Markus Krombholz
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.)
Giesecke and Devrient Currency Technology GmbH
Original Assignee
Giesecke and Devrient 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
Application filed by Giesecke and Devrient GmbH filed Critical Giesecke and Devrient GmbH
Publication of EP2430237A2 publication Critical patent/EP2430237A2/fr
Application granted granted Critical
Publication of EP2430237B1 publication Critical patent/EP2430237B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/66—Coatings characterised by a special visual effect, e.g. patterned, textured
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/14—Security printing

Definitions

  • the invention relates to a security paper for the production of value documents with an optically variable security element and a paint receiving layer with a recess, a method for producing such a security paper and an apparatus for carrying out the manufacturing method and a value document produced from the security paper.
  • Value documents within the meaning of the present invention are, for example, banknotes, stocks, bonds, certificates, vouchers, checks, lottery tickets, high-quality admission tickets, passports, identity cards, credit cards and other flat valuables. Such valuables can also be packaging for possibly high-quality products.
  • security paper in the sense of the present invention comprises precursors of such value documents which, for example, are not fit for circulation.
  • the security paper can be present in quasi-endless form and be further processed at a later date.
  • Such value documents are often provided with security elements for the purpose of security, which permit a verification of the authenticity of the value documents and at the same time serve as protection against unauthorized reproduction.
  • security elements comprehensive value documents are often covered with another printed image.
  • the optically variable security element may already be part of the security paper used for the production.
  • optically variable elements are used as the security element, wherein in the context of the present invention an optically variable security element is understood to be an optical element whose visual impression generated by an observer depends on the viewing direction, that is to say the observer's perspective on the optical element and possibly also from the direction of incidence of an illumination light beam.
  • the optically variable element In order for the optically variable effect to be recognizable, ie to be visually perceived by a viewer or detected by machine, the optically variable element must either be arranged directly on the substrate surface of the security paper or it may only be coated by layers having sufficiently high transparency. Therefore, it is generally problematic if the security paper is to be printed, for example, for producing a value document above one such optically variable security element with one or more further print layers, since the detectability of the optically variable effect can be impaired or completely prevented. In order nevertheless to ensure the recognizability of the optically variable effect, a cutout in the region of the optically variable security element could be provided in the further printing layer. However, this would on the one hand affect the freedom of design for the printed image to be applied. On the other hand, this would lead to a clearly visible edge in the additionally applied print image, which would disturb the visual impression of the value document and is therefore undesirable.
  • WO 02/094577 A1 describes a security, in particular a banknote and a method for its production.
  • the security has a security element and a protective layer with a matt surface, which is recessed in the area of the security element. If necessary, the recessed area is provided with a protective lacquer layer formed from a gloss varnish.
  • Object of the present invention is therefore to provide a security paper on which a printed image can be applied over the entire surface to produce a value document, at the same time sufficient visibility of the optically variable effect of arranged in the security paper optically variable security element is guaranteed. It is a further object of the present invention to specify a method for producing such a security paper, an apparatus for carrying out the production method and a document of value produced from the security paper.
  • the security paper according to the invention for the production of value documents comprises a substrate with an optically variable security element, which is recognizable when viewing at least a first side of the substrate, and a color accepting layer which is arranged on the first substrate side in the viewing direction in front of the optically variable security element, wherein the Ink accepting layer in a first region of the substrate surface, which is located outside the area in which the optically variable security element is arranged, has a first layer thickness and in a second region of the substrate surface, which describes the area in which the optically variable security element is or optionally may have a reduced thickness compared to the first layer thickness.
  • a recognizable optically variable security element is understood to mean an optical element whose optically variable effect can be detected mechanically or can be visually perceived by a viewer.
  • optically variable security elements are diffraction structures which produce a viewing angle-dependent visual impression, in particular by reconstruction of optically perceivable patterns, such as embossing or volume holograms and other kinegrams such as achromatic matt structures.
  • optically variable elements are optical elements that exhibit a so-called color shift effect, such as single or multi-layer thin-layer interference layers or liquid crystal layers, which can be present as a continuous layer or in pigment form (so-called effect pigments, such as iriodines) , Further examples are lens or micromirror structures within the optically variable element.
  • a security paper one or more layers of substrates can be used.
  • any type of paper or paper-like material is considered, in particular cotton vellum paper.
  • paper which contains a certain proportion x of a polymeric material in the range between 0 and 100% by weight can be used.
  • a plastic film for example a polyester film, can be used as the substrate.
  • This film may additionally be monoaxially or biaxially stretched. Such a stretching of the film leads inter alia to the fact that it receives polarizing properties, which are used as a further security feature in the optically variable security element.
  • a multilayer composite comprising, for example, a layer of paper or a paper-like material can be used.
  • a transparent plastic or polymer layer is laminated from both sides, whereby such a multilayer composite has an extremely high stability and durability.
  • security papers are used with plastic or polymer-coated paper layers for the production of film composite banknotes.
  • the multilayer composite may also comprise a central layer of a plastic or polymeric material, which is coated on both sides with a respective layer of paper or a paper-like material.
  • a multilayer, paper-free composite material can also be used as a multilayer substrate material.
  • the materials used in such single- or multilayer substrates may have additives which serve as a further authenticity feature, such as luminescent substances, which are preferably transparent in the visible wavelength range and in the non-visible wavelength range by a suitable auxiliary, for example a UV or IR radiation emissive radiation source, can be excited to produce a visible or at least detectable with auxiliary luminescence.
  • a suitable auxiliary for example a UV or IR radiation emissive radiation source
  • the use of an additional printing or ink-accepting layer can improve the ink receptivity or sufficient ink receptivity for the ink to be additionally applied Print image to be created in the first place.
  • the term ink-accepting layer is also understood to mean layers which impart improved adhesion to the substrate surface, in particular to the plastic or polymer layer of a film composite banknote.
  • the ink-accepting layer can also be composed of several partial layers.
  • a sub-layer arranged directly on the substrate surface primarily imparts increased adhesion of a further sub-layer to the security paper, while the further sub-layer primarily ensures the ink-receptivity of the printing ink forming the further printed image.
  • the partial layer arranged directly on the substrate surface and having an adhesive capability is also referred to as a primer layer.
  • the printing ink of the ink-accepting layer and of the optional partial layers preferably consists of silica gel, a leveling additive, a crosslinking agent and a binder.
  • Such ink-receiving layers are substantially colorless and often show a matting effect with increasing layer thickness.
  • a paint receiving layer is applied over the entire surface of the substrate surface and has - at least in the first substrate region in the context of the invention - a constant layer thickness.
  • the ink-receiving layer has no recognizable structures and conveys to the viewer - in contrast to other color layers - no information, for example in the form of characters, graphic symbols or colors.
  • a dye-receiving layer in the sense of the invention forms a visually inconspicuous, uniform primer for the printing ink of a further printed image to be applied, for example, for producing a value document.
  • the further printed image can be applied by means of the offset or another suitable printing method. This can also be a background pressure.
  • the optically variable security element is arranged at least partially on the surface of the substrate and comprises, for example, a film element.
  • the substrate surface of the security paper has different materials and correspondingly different ink accepting capabilities.
  • the security element can be created directly on the substrate of a security paper or a security document to be secured or prepared on a separate carrier.
  • a separate carrier preferably comprises plastic or a polymer material and may be, for example, a foil material, in particular a transfer material.
  • plastics such as PET (polyethylene terephthalate), PBT (polybutylene terephthalate), PEN (polyethylene naphthalate), PP (polypropylene), PA (polyamide) and PE (polyethylene) come into consideration.
  • PET polyethylene terephthalate
  • PBT polybutylene terephthalate
  • PEN polyethylene naphthalate
  • PP polypropylene
  • PA polyamide
  • PE polyethylene
  • the security element forms a transfer element and can be applied in an endless form on a carrier material.
  • the attachment of the security element on the substrate takes place with the aid of an adhesive layer, for which purpose preferably a hot-melt adhesive is used.
  • the carrier material optionally withdrawn again, so that only the security element remains on the substrate.
  • the optically variable security element may be formed as a patch or label and, for example, a flat shape, with comparable length dimensions in all directions on the substrate surface, or an elongated shape, for example in the form of a strip, as is the case with security threads. If such an optically variable security element is designed as a transfer element with an optionally transparent film as a carrier element, it is also referred to as a film element, foil patch or film strip. Such a strip is applied to the surface of a substrate, for example in the form of a so-called lead strip. Film elements may also be applied over a recess in the form of a hole in the substrate and thus used as a hole cover, which at the same time ensures visibility of the optically variable security element from both sides of the substrate.
  • the optically variable security element may also be partially embedded in the substrate material, for example in the form of a security thread, and only come to the surface in some areas, as in the case of so-called window security threads, for example, where the security thread is applied on only one side of the substrate in regions and optionally periodically Surface occurs, and so-called pendulum security threads in which the security thread on both sides of the substrate alternately comes to the surface, the case.
  • the optically variable security element is disposed on or embedded in the central layer of paper or papery material.
  • the optically variable security element is thus located on both sides within the two laminated plastic or polymer layers and is protected by these.
  • these two laminated plastic or polymer layers on a sufficiently high transparency, which ensures sufficient visibility of the optically variable effect of the optically variable security element.
  • the optically variable security element is arranged in the viewing direction behind the transparent plastic or polymer layer and the ink-accepting layer is arranged in the viewing direction in front of the transparent layer.
  • the exact position of the optically variable security element in the substrate of the security paper is not well defined and / or has variations.
  • Such registry variations are well intended, for example, in the case of security threads, since the security thread causes thickening of the substrate material.
  • security threads such as banknotes
  • the total area in which the security thread can come to rest is also referred to as the wobble area, and this area is understood to be the second area of substrate in the sense of the present invention.
  • the matting which results from the use of the ink-accepting layer is reduced and thus already the recognizability of the optically variable effect is improved.
  • the reduced layer thickness of the ink-receiving layer in the second substrate region results in a reduced ink-receptivity of the substrate surface of the security thread, thus also the degree of coverage of a printed ink layer forming a print image to be applied is reduced and thereby the visibility of the optically variable effect of the underlying optically variable security element is improved.
  • the layer thickness within the second substrate region is reduced to zero, thus providing a complete recess in the ink-accepting layer in the second substrate region.
  • the ink receptivity depends on the surface properties of the substrate of the security paper, which is very low especially in composite film banknotes whose surface is formed by a plastic or polymer layer.
  • the present invention is based on the finding that the optically variable effect of an optically variable security element is still recognizable if a dye receiving layer with a reduced layer thickness and a color layer with a correspondingly reduced degree of coverage in the viewing direction is located in front of the optically variable element.
  • the additional printed image to be applied in the production of the value document can be printed over the whole area without consideration of the position of the optically variable security element in the substrate of the security paper, whereby the manufacturing process is simplified and the design freedom for the further printed image increases.
  • the ink receiving layer is gravure applied to the substrate of the security paper.
  • the printing forme used for this purpose for example a printing cylinder or a printing plate, has a first and a second printing region, which come to lie in each case in the first and second substrate region of the security paper during gravure printing.
  • the second pressure region of the printing plate has an opposite reduced ink receptivity to the first printing area for the ink from which the ink accepting layer is formed.
  • the ink receptivity is set by depressions in the printing form. These depressions can be milled, for example by means of a CNC machine, as is usual in steel gravure, or etched, as is customary in intaglio printing.
  • the depressions are in the form of wells and the second pressure region has a reduced cell size compared to the first pressure region, an increased well spacing and / or a reduced well depth.
  • the layer thickness of the ink-accepting layer within the second substrate region has a stepped or continuously decreasing profile, preferably with a constant gradient.
  • the step-shaped or continuously decreasing profile of the layer thickness of the ink-accepting layer in the second substrate region adjoins seamlessly to the first layer thickness in the first substrate region.
  • Such a course having a spatial gradient has the advantage that in the edge region between the first and the second substrate region no disturbing edges occur which impair the visual impression of the value document to be produced.
  • the step height of the step-shaped course is preferably such chosen small that these stages are imperceptible to a viewer.
  • the printing plate in its second printing region has a corresponding gradual course in the ink receptiveness. This can be ensured by a corresponding configuration of the depressions in the printing form. If the printing form has depressions in the form of wells, the cell size is gradually reduced, the cell gap is gradually increased and / or the well depth is gradually reduced. The gradual course of cup size, cup spacing and / or cup depth can be configured continuously.
  • the production of the printing form is simplified if the course of the ink receptivity of the printing plate has a constant gradient, in which preferably the size of the cells, the distance between the cells and / or the depth of the well are varied with a constant gradient.
  • the production of the printing form is also simplified if, in addition or alternatively, the ink receptivity of the printing form shows a step-shaped, and thus region-wise constant course.
  • the depressions in the printing form are configured in such a way that a uniform ink receptivity is achieved in certain regions, regions having different, gradually decreasing ink receptivity being arranged directly next to each other.
  • the ink receptivity directly adjacent areas preferably differs only slightly, so that the step height of the staircase shape is so small that they can not be visually perceived by a viewer in the resulting ink receiving layer.
  • the gradient results from the positions and heights of the steps.
  • a multi-layer ink receiving layer is printed on the substrate of the security paper by several printing plates, preferably a plurality of successively arranged printing cylinder, each print a sub-layer of the ink receiving layer on the substrate of the security paper.
  • each printing plate has the above-described step-shaped course of the ink receptiveness.
  • the position of the steps of the respective step-like courses is offset relative to each other in the various printing forms, so that a color receiving layer is formed on the substrate, which has a high number of steps, each with a low step height.
  • the number of steps of the layer thickness of the ink-accepting layer on the substrate of the security paper is equal to the sum of the steps of the step-shaped course of the ink receptiveness over all printing forms used.
  • This has the advantage that with only a few gradations in the ink receptiveness in each of the printing plates, a high number of steps in the layer thickness of the ink receiving layer on the substrate of the security paper can be generated, which on the one hand simplifies the production of the printing plates and on the other visual perceptibility of the staircase shape of the layer thickness of the ink receiving layer on the substrate reduced or completely suppressed.
  • improved homogeneity of the ink-accepting layer and of the print image to be applied can be achieved.
  • the layer thickness of the ink-accepting layer within the second substrate region has a minimum value. This minimum value is different from zero and is, for example, 25% of the first layer thickness in the first substrate region. This minimum value can be assumed in a planar region within the second substrate region. If the second substrate region has an elongated shape, as is the case, for example, in the case of a security thread as an optically variable security element, the minimum value of the layer thickness within the second substrate region is preferably assumed only in a linear region. If the second substrate region has comparable length dimensions in all directions on the substrate surface, as is the case, for example, in the case of a planar patch, then the layer thickness of the ink-accepting layer preferably has the minimum value only in a punctiform region.
  • the profile of the layer thickness of the ink-accepting layer is symmetrical to the region in which the minimum value is assumed. This has the advantage that the perceptibility of the gradual course of the layer thickness within the second substrate region is further reduced.
  • the security paper forms the precursor of a film composite banknote.
  • a transparent plastic or polymer film is laminated on both sides on a central layer of a paper or a paper-like material.
  • the optically variable security element is arranged in the region of the central layer of paper or paper-like material and is thus located in the viewing direction behind the transparent plastic or polymer layer.
  • the ink receiving layer is disposed directly on this transparent layer and is therefore in the viewing direction in front of the transparent layer.
  • the optically variable security element is also when viewing a second, the first Visible substrate side of the substrate opposite side.
  • This can be realized, for example, by a pendulum security thread, which is recognizable in sections from the front and back of a value document or by a security element which forms a hole cover of a recess in the substrate.
  • Fig. 1 is shown as a document of value a banknote 1, with a window security thread 2 as optically variable security element.
  • the security thread 2 has a strip width of 3 to 5 mm and is located anywhere due to registration variations the so-called wobble area 3, which has a strip width of about 1 cm.
  • Fig. 2 is a first embodiment of a security paper 7, which is used to produce a film composite banknote 1, as in Fig.1 is used, in cross section along the line AA 'in Fig. 1 represented.
  • the substrate 8 of the security paper 7 comprises a central paper layer 4 and transparent PET films 5 laminated on both sides.
  • the security thread 2 is shown, which in the illustrated sectional drawing (along the line A-A ') comes to the surface of the paper layer 4 and thus considering the security paper 7 in Fig. 2 can be seen from above.
  • the security thread 2 shows an optically variable effect. He is in the in Fig. 2 shown embodiment within the wobble region 3 centrally arranged.
  • a paint receiving layer 6 is applied on the surface of the in Fig. 2 drawn above PET film 5.
  • This has a first uniform layer thickness outside of the wobble area 3.
  • the layer thickness of the ink-accepting layer 6, starting from the edge region of the wobble region 3 decreases continuously to a minimum value.
  • Such a ink accepting layer can by conventional coating and application methods, for example by means of a printing cylinder in gravure whose ink receptivity in a range that comes to rest on the wobble region 3 of the security paper 7 during gravure, a correspondingly continuous course of the ink receptiveness , be created.
  • This in Fig. 3 illustrated second embodiment differs from the in Fig. 2 illustrated first embodiment by a staircase-shaped Instead of a continuous course of the layer thickness of the ink-accepting layer 6 within the wobble region 3, such a configured ink-accepting layer 6 can in principle also be produced in gravure printing by means of a printing cylinder which exhibits a corresponding step-shaped course of the ink receptivity.
  • the pressure-receiving layer 6 at least outside the wobble region 3 consists of three sub-layers 6a, 6b, 6c, each having a layer thickness of about one third of the total layer thickness of the ink receiving layer 6.
  • the partial layers 6b and 6c have recesses, while the partial layer 6a has no recess and is applied over the entire surface of the security paper 7.
  • a minimum value of the layer thickness of the ink-accepting layer 6 is assumed within the wobble area, which corresponds to the layer thickness of the partial layer 6a, ie of approximately one third of the layer thickness outside the wobble area 3.
  • the three partial layers 6a, 6b and 6c become is applied to the banknote 1 by three different impression cylinders DW1, DW2, DW3, the impression cylinder printing the sub-layer 6a showing no recesses of the ink receptivity, the impression cylinder producing the sub-layer 6b in a printing area narrower than the wobble region 3 has zero ink receptivity, and the printing cylinder which generates the divided layer 6c has zero ink receptivity in a printing region whose width is equal to the width of the wobble region 3.
  • the three impression cylinders are arranged suitably to one another, so that the in Fig. 2 shown stepped shape of the layer thickness of the pressure-receiving layer 6 within the wobble region 3 is formed.
  • the upper sub-layers 6b and 6c serve primarily to improve the absorption of the still applied Print image forming printing ink. They are also referred to as print acceptance layers.
  • the lower, directly on the surface of the substrate 8 arranged sub-layer 6a serves primarily to improve the mechanical adhesion of the overlying sub-layers 6b and 6c on the substrate surface of the security paper.
  • the partial layer 6a exhibits a suitable adhesive capability. It is also called a primer layer.
  • each of the three printing cylinders on a stepped gradation of the ink receptiveness has five gradations of 0, 25, 50, 75 or 100% of the maximum ink receptivity, whereby four grades on each of these printing cylinders are transferred from 100% to 0% ink Receptiveness arise.
  • the ink-receptive capacity has only four gradations of 25, 50, 75, or 100% of the maximum ink receptivity, thereby producing three gradations in the ink transfer from 100% to 25% ink receptivity.
  • the steps of the step-shaped courses of the three printing cylinders are suitably staggered relative to each other, so that the resulting entire ink-receiving layer has a total of eleven stages which are uniform in height and position.
  • the film thickness of the ink accepting layer gradually decreases from a unit-free value of 300 outside the wobble area 3 to a minimum value of 25.
  • the resulting fine, stepped gradation in the layer thickness can no longer be perceived by a viewer, whereby the visual impression of the resulting banknote 1 optically disturbing edges are avoided, while the recognizability of the optically variable effect of the security thread 2 is ensured.
  • a pressure cylinder for gravure printing is shown in perspective. It contains depressions in the form of wells 9 for receiving the ink receiving layer 6 forming ink.
  • a printing area 10 the size of the cups 9 decreases continuously to a minimum value, and the ink capacity of the printing cylinder exhibits a corresponding spatially gradual course.
  • the printing area 10 comes to rest on the wobble area 3 of the security thread 2 of the security paper 7.
  • the length of the printing area 10 in the direction of the axis of the printing cylinder is less than or equal to the width of the wobble area 3 on the substrate 8 of the security paper 7.
  • the illustrated printing cylinder can thus produce a color accepting layer 6 which has a reduced layer thickness within the wobble area 3.
  • stepless courses of the layer thickness of the ink-accepting layer 6 within the wobble area 3 can thereby be realized to a good approximation.
  • a plurality of printing cylinders are combined to realize a plurality of sub-layers of the ink-receiving layer 6.
  • a printing plate is used with a correspondingly gradual course of the ink receptiveness. While in the printing cylinder, the gradual course of the ink receptiveness is only in the axial direction, the pressure plate shows such a gradual course in different Directions on the surface of the printing plate, wherein the gradients may be different in different directions.
  • the area in which there is a gradual pattern of the ink receptiveness on the printing plate can be adapted to the shape of the optically variable security element to be printed. This allows, for example, the overprinting of an optically variable security element in the form of a flat patch or a label.
  • the ink-accepting layer comprises a total of 4 partial layers, three print-receiving layers, which serve primarily to improve the recording of the printing image to be applied, and a primer layer, which primarily improves the mechanical adhesion of the printing receiving layers to the substrate surface of the Security paper serve, wherein the substrate surface consists of a PET film and the primer layer is disposed directly on this.
  • the three pressure-receiving layers comprise a longer-chain alcohol, for example Dowanol type or tert-butoxypropanol, as crosslinker penthaerythritol glycidyl ether and as binder an aqueous polyurethane or polyacrylate or urethane acrylate dispersion.
  • a longer-chain alcohol for example Dowanol type or tert-butoxypropanol
  • crosslinker penthaerythritol glycidyl ether and as binder an aqueous polyurethane or polyacrylate or urethane acrylate dispersion.
  • other additives such as waxes, surface, antifoam additives may be used.
  • the pressure-receiving layers comprise 0-5% crosslinker, 0-5% leveling additive, 5-50%, preferably 10-25% silica gel and 40-80%, preferably 65-75% binder.
  • the composition of the three pressure receiving layers may vary.
  • the uppermost layer on the security paper has a lower one Amount of silica gel as the underlying layers.
  • This has the advantage that the uppermost pressure-receiving layer is stable against abrasion and at the same time sufficiently porous to pass the ink of the printed image to be applied to the underlying pressure-receiving layers.
  • the underlying pressure-receiving layers have higher silica gel proportions and therefore act like a sponge, with a possibly lower stability against abrasion is not significant.
  • the primer layer also has a longer-chain alcohol, for example Dowanol type or tert.-butoxypropanol, as crosslinker polyfunctional aziridine and as binder an aqueous acrylate, stryol acrylate or PU dispersion, for example Alberdingk U 520, in addition to one or different silica gels
  • Primer layer comprises 0-5% crosslinker, 0-10% leveling additive, 0-20%, preferably 0-10% silica gel and 80-100%, preferably 85-90% binder.
  • a suitable, for example chemical pretreatment of the PET film of the security paper for a film composite banknote a sufficient adhesion of the printing acceptance layers can also be achieved directly on the PET film, whereby the primer layer can be dispensed with.

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Claims (13)

  1. Papier de sécurité (7) destiné à la fabrication de documents de valeur, comprenant un substrat (8) doté d'un élément de sécurité (2) optiquement variable qui, lors d'une observation d'au moins une première face du substrat (8), est reconnaissable, et une couche de réception d'encre (6) qui est agencée au moins sur la première face du substrat (8), la couche de réception d'encre (6) présentant, dans une première zone de substrat située à l'extérieur de la zone de l'élément de sécurité (2) optiquement variable, une première épaisseur de couche, et présentant, dans une deuxième zone de substrat dans laquelle l'élément de sécurité (2) optiquement variable est agencé, une épaisseur de couche réduite par rapport à la première épaisseur de couche, et l'épaisseur de couche présentant, à l'intérieur de la deuxième zone de substrat à partir de la première épaisseur de couche dans la première zone de substrat, une évolution diminuant en escalier ou progressivement, et l'épaisseur de couche présentant, à l'intérieur de la deuxième zone de substrat, une valeur minimale.
  2. Papier de sécurité (7) selon la revendication 1, caractérisé en ce que l'épaisseur de couche à l'intérieur de la deuxième zone de substrat à partir de la première épaisseur de couche dans la première zone de substrat présente une évolution à gradient constant diminuant en escalier ou progressivement.
  3. Papier de sécurité (7) selon la revendication 1 ou 2, caractérisé en ce que l'épaisseur de couche à l'intérieur de la deuxième zone de substrat présente dans une zone en forme de points ou en forme de lignes une valeur minimale.
  4. Papier de sécurité (7) selon une des revendications précédentes, caractérisé en ce que le substrat (8) comprend une couche (4) en papier ou en un matériau qui ressemble à du papier revêtue de préférence d'une couche (5) transparente en matière plastique ou en polymère, particulièrement de préférence sur ses deux faces.
  5. Papier de sécurité (7) selon une des revendications précédentes, caractérisé en ce que l'élément de sécurité (2) du papier de sécurité (7) est réalisé sous forme de fil de sécurité, de préférence sous forme de fil de sécurité à fenêtre, sous forme de patch de film ou de ruban de film.
  6. Papier de sécurité (7) selon une des revendications précédentes, caractérisé en ce que l'élément de sécurité (2) optiquement variable est aussi reconnaissable lors d'une observation d'une deuxième face du substrat (8) opposée à la première face du substrat, l'élément de sécurité (2) optiquement variable étant de préférence réalisé sous forme de fil de sécurité pendulaire ou en tant que recouvrement par-dessus un évidement dans le substrat (8).
  7. Document de valeur comprenant un papier de sécurité (7) selon une des revendications de 1 à 6, le document de valeur comportant une couche d'encre d'impression agencée sur la couche de réception d'encre (6).
  8. Procédé de fabrication d'un papier de sécurité (7) destiné à la fabrication de documents de valeur, comprenant les étapes :
    - mise à disposition d'un substrat (8) doté d'un élément de sécurité (2) optiquement variable qui, lors d'une observation d'au moins une première face du substrat (8), est reconnaissable, et
    - application d'une couche de réception d'encre (6) au moins sur la première face du substrat (8), de telle façon que la couche de réception d'encre (6) présente, dans une première zone de substrat située à l'extérieur de la zone de l'élément de sécurité (2) optiquement variable, une première épaisseur de couche, et présente, dans une deuxième zone de substrat dans laquelle l'élément de sécurité (2) optiquement variable est agencé, une épaisseur de couche réduite par rapport à la première épaisseur de couche, et que l'épaisseur de couche présente, à l'intérieur de la deuxième zone de substrat à partir de la première épaisseur de couche dans la première zone de substrat, une évolution diminuant en escalier ou progressivement, et que l'épaisseur de couche présente, à l'intérieur de la deuxième zone de substrat, une valeur minimale.
  9. Procédé selon la revendication 8, caractérisé en ce que la couche de réception d'encre (6) est appliquée par impression en creux avec un bloc d'impression comportant une première et une deuxième zone d'impression qui, pendant l'impression en creux, sont respectivement positionnées sur la première et la deuxième zone de substrat, la deuxième zone d'impression présentant, par rapport à la première zone d'impression, une capacité réduite de chargement d'encre d'impression.
  10. Procédé selon la revendication 9, caractérisé en ce que le bloc d'impression comporte des alvéoles (9) qui présentent dans la deuxième zone d'impression, par rapport à la première zone d'impression, une taille réduite, un écart réduit et/ou une profondeur réduite.
  11. Procédé selon la revendication 9 ou 10, caractérisé en ce que la capacité de chargement d'encre d'impression à l'intérieur de la deuxième zone d'impression, à partir de la capacité de chargement d'encre d'impression dans la première zone d'impression, présente une évolution diminuant en escalier ou progressivement, de préférence à gradient constant.
  12. Procédé selon la revendication 11, caractérisé en ce que l'application de la couche de réception d'encre (6) est effectuée par plusieurs blocs d'impression en plusieurs étapes partielles, les plusieurs blocs d'impression présentant dans les respectivement deuxièmes zones d'impression une évolution de la capacité de chargement d'encre d'impression en escalier respectivement décalée par rapport aux autres blocs d'impression.
  13. Dispositif d'exécution d'un procédé selon une des revendications de 8 à 12, lequel comporte une pluralité de cylindres d'impression pour l'application d'une couche de réception d'encre (6), la pluralité de cylindres d'impression présentant une évolution de la capacité de chargement d'encre d'impression en escalier respectivement décalée par rapport aux autres cylindres d'impression.
EP10718994.6A 2009-05-12 2010-05-11 Couche réceptrice d'encre pourvue d'un évidement Not-in-force EP2430237B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200910020846 DE102009020846A1 (de) 2009-05-12 2009-05-12 Farbannahmeschicht mit Aussparung
PCT/EP2010/056496 WO2010130755A2 (fr) 2009-05-12 2010-05-11 Couche réceptrice d'encre pourvue d'un évidement

Publications (2)

Publication Number Publication Date
EP2430237A2 EP2430237A2 (fr) 2012-03-21
EP2430237B1 true EP2430237B1 (fr) 2017-01-25

Family

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Application Number Title Priority Date Filing Date
EP10718994.6A Not-in-force EP2430237B1 (fr) 2009-05-12 2010-05-11 Couche réceptrice d'encre pourvue d'un évidement

Country Status (10)

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EP (1) EP2430237B1 (fr)
CN (1) CN102459759B (fr)
AU (1) AU2010247373C1 (fr)
BR (1) BRPI1014303A2 (fr)
CA (1) CA2761755C (fr)
DE (1) DE102009020846A1 (fr)
ES (1) ES2619841T3 (fr)
MX (1) MX2011011936A (fr)
RU (1) RU2572126C2 (fr)
WO (1) WO2010130755A2 (fr)

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Publication number Priority date Publication date Assignee Title
CN102179966A (zh) * 2011-01-20 2011-09-14 中国人民银行印制科学技术研究所 防伪元件与防伪产品
GB2542786B (en) * 2015-09-29 2018-02-28 De La Rue Int Ltd Security print media and method of manufacture thereof
MA43351A (fr) * 2015-09-29 2018-08-08 De La Rue Int Ltd Dispositif d'impression de sécurité et son procédé de fabrication
GB2542784B (en) * 2015-09-29 2018-08-01 De La Rue Int Ltd Security print media and method of manufacture thereof
GB2542783B (en) * 2015-09-29 2018-02-07 De La Rue Int Ltd Security print media and method of manufacture thereof
DE102016015546A1 (de) * 2016-12-27 2018-06-28 Giesecke+Devrient Currency Technology Gmbh Mehrlagiges Wertdokumentsubstrat
DE102017003795A1 (de) 2017-04-19 2018-10-25 Giesecke+Devrient Currency Technology Gmbh Polymeres Wertdokumentsubstrat, Sicherheitselement, Wertdokument und Herstellungsverfahren
DE112018002127T5 (de) 2017-05-17 2020-01-09 Ccl Secure Pty Ltd Eine Banknote und ein Verfahren zum Herstellen einer Vielzahl von Banknoten und eine Druckmaschine zum Herstellen einer Vielzahl von Banknoten
DE102019005551A1 (de) * 2019-08-07 2021-02-11 Giesecke+Devrient Currency Technology Gmbh Herstellverfahren für ein Sicherheitspapier und damit erhältliches Sicherheitspapier
DE102019007696A1 (de) 2019-11-06 2021-05-06 Giesecke+Devrient Currency Technology Gmbh Wertdokument
DE102023122098A1 (de) * 2023-08-17 2025-02-20 Giesecke+Devrient Currency Technology Gmbh Verfahren zur Herstellung eines Wertdokuments und Wertdokument

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EP0343104A3 (fr) * 1988-05-18 1990-08-08 De La Rue Giori S.A. Presse recto-verso à bobine, notamment pour papiers-valeurs
DE4002979A1 (de) * 1990-02-01 1991-08-08 Gao Ges Automation Org Wertpapier mit optisch variablem sicherheitselement
ITMI920068A1 (it) * 1992-01-16 1993-07-16 Francesco Bosisio Procedimento per la protezione delle scritture su documenti cartacei in specie assegni bancari
FR2687417A1 (fr) * 1992-02-13 1993-08-20 Arjo Wiggins Sa Feuille imprimable infalsifiable par procedes mecaniques.
FR2814476B1 (fr) * 2000-09-11 2003-04-11 Arjo Wiggins Sa Feuille de securite comportant une couche transparente ou translucide
DE10124630A1 (de) * 2001-05-18 2002-11-21 Giesecke & Devrient Gmbh Wertpapier und Verfahren zu seiner Herstellung
HUP0402519A2 (hu) * 2001-12-21 2005-05-30 Giesecke & Devrient Gmbh Lapanyag, berendezés, valamint eljárás a lapanyag előállítására és feldolgozására
DE102009007779C5 (de) * 2009-02-04 2017-07-27 Bundesdruckerei Gmbh Verfahren zur Herstellung eines ohne technische Hilfsmittel visuell wahrnehmbaren Sicherheitsmerkmals, Sicherheitsmerkmal für kunststoffbasierendes Wert- oder Sicherheitsdokument sowie Dokument mit wenigstens einem solchen Sicherheitsmerkmal

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Also Published As

Publication number Publication date
AU2010247373A1 (en) 2011-12-01
CA2761755A1 (fr) 2010-11-18
DE102009020846A1 (de) 2010-11-25
RU2572126C2 (ru) 2015-12-27
WO2010130755A3 (fr) 2011-01-06
MX2011011936A (es) 2011-12-06
AU2010247373C1 (en) 2014-10-23
CA2761755C (fr) 2014-03-04
AU2010247373B2 (en) 2013-07-11
CN102459759B (zh) 2014-08-20
EP2430237A2 (fr) 2012-03-21
BRPI1014303A2 (pt) 2016-04-05
CN102459759A (zh) 2012-05-16
ES2619841T3 (es) 2017-06-27
RU2011150113A (ru) 2014-06-20
WO2010130755A2 (fr) 2010-11-18

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