EP3504066A1 - Sicherheitselement, verfahren zum herstellen desselben und wertdokument - Google Patents
Sicherheitselement, verfahren zum herstellen desselben und wertdokumentInfo
- Publication number
- EP3504066A1 EP3504066A1 EP17758797.9A EP17758797A EP3504066A1 EP 3504066 A1 EP3504066 A1 EP 3504066A1 EP 17758797 A EP17758797 A EP 17758797A EP 3504066 A1 EP3504066 A1 EP 3504066A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- polymer
- security element
- water
- feature substance
- element according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 17
- 229920000642 polymer Polymers 0.000 claims abstract description 108
- 239000000126 substance Substances 0.000 claims abstract description 42
- 229920003169 water-soluble polymer Polymers 0.000 claims abstract description 23
- 229920003176 water-insoluble polymer Polymers 0.000 claims abstract description 20
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 16
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 42
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 42
- 239000000835 fiber Substances 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 26
- 239000011118 polyvinyl acetate Substances 0.000 claims description 22
- 229920002689 polyvinyl acetate Polymers 0.000 claims description 22
- 238000005520 cutting process Methods 0.000 claims description 14
- 229920001131 Pulp (paper) Polymers 0.000 claims description 13
- 239000006096 absorbing agent Substances 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 8
- 238000000576 coating method Methods 0.000 claims description 8
- 239000011258 core-shell material Substances 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 8
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 7
- 238000010521 absorption reaction Methods 0.000 claims description 7
- 239000002904 solvent Substances 0.000 claims description 7
- 238000001125 extrusion Methods 0.000 claims description 5
- 238000007127 saponification reaction Methods 0.000 claims description 5
- 229920000877 Melamine resin Polymers 0.000 claims description 4
- 238000009833 condensation Methods 0.000 claims description 4
- 230000005494 condensation Effects 0.000 claims description 4
- IVJISJACKSSFGE-UHFFFAOYSA-N formaldehyde;1,3,5-triazine-2,4,6-triamine Chemical compound O=C.NC1=NC(N)=NC(N)=N1 IVJISJACKSSFGE-UHFFFAOYSA-N 0.000 claims description 4
- 229920000728 polyester Polymers 0.000 claims description 4
- 230000007423 decrease Effects 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 239000002966 varnish Substances 0.000 claims description 3
- 229920002554 vinyl polymer Polymers 0.000 claims description 3
- 239000002202 Polyethylene glycol Substances 0.000 claims description 2
- 229920000578 graft copolymer Polymers 0.000 claims description 2
- 239000002362 mulch Substances 0.000 claims description 2
- 239000003973 paint Substances 0.000 claims description 2
- 229920001223 polyethylene glycol Polymers 0.000 claims description 2
- 230000002708 enhancing effect Effects 0.000 abstract 1
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical group CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 24
- 238000004064 recycling Methods 0.000 description 19
- 239000000243 solution Substances 0.000 description 10
- 239000000049 pigment Substances 0.000 description 8
- 230000007062 hydrolysis Effects 0.000 description 6
- 238000006460 hydrolysis reaction Methods 0.000 description 6
- 239000000976 ink Substances 0.000 description 6
- 239000000758 substrate Substances 0.000 description 6
- 239000002131 composite material Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 4
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- 230000005856 abnormality Effects 0.000 description 4
- 239000003086 colorant Substances 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 230000006378 damage Effects 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 238000010348 incorporation Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000004952 Polyamide Substances 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 239000012634 fragment Substances 0.000 description 2
- 238000004020 luminiscence type Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 241000526960 Amaranthus acanthochiton Species 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 241001290266 Sciaenops ocellatus Species 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000007857 degradation product Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 125000004185 ester group Chemical group 0.000 description 1
- 238000004374 forensic analysis Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229920001477 hydrophilic polymer Polymers 0.000 description 1
- 229920001600 hydrophobic polymer Polymers 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000004922 lacquer Substances 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000012667 polymer degradation Methods 0.000 description 1
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 1
- 239000001267 polyvinylpyrrolidone Substances 0.000 description 1
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000009281 ultraviolet germicidal irradiation Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D15/00—Printed matter of special format or style not otherwise provided for
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
- B42D25/369—Magnetised or magnetisable materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
- B42D25/378—Special inks
- B42D25/382—Special inks absorbing or reflecting infrared light
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
- B42D25/378—Special inks
- B42D25/387—Special inks absorbing or reflecting ultraviolet light
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/40—Manufacture
- B42D25/45—Associating two or more layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/40—Manufacture
- B42D25/475—Cutting cards
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/40—Manufacture
- B42D25/45—Associating two or more layers
- B42D25/455—Associating two or more layers using heat
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/40—Manufacture
- B42D25/45—Associating two or more layers
- B42D25/46—Associating two or more layers using pressure
Definitions
- the invention relates to a security element for securing value documents, comprising a feature substance-containing first polymer which is at least partially surrounded by a second polymer, wherein the first polymer is a hydrophobic, water-insoluble polymer, which at elevated pH and at elevated ambient temperature at a treatment time of at least 30 minutes is convertible into a hydrophilic, water-soluble polymer, and the second polymer is a hydrophilic, water-soluble polymer.
- the invention furthermore relates to methods for producing the security element and to a security document having the security document.
- Paper recycling processes which for environmental reasons should ideally also be subject to worn-out or defective production documents, in particular banknotes, usually take place at elevated temperature and at elevated pH.
- Conventional security elements to secure value documents such as mottled fibers or planchettes with feature properties such as UV luminescence, IR absorption or photochromism, however, are so stable that they are not destroyed under the conditions of paper recycling processes.
- the conventional security elements are only damaged and thus remain as visible, disturbing fragments in the paper pulp.
- the invention has for its object to provide an improved security feature for securing value documents.
- the invention is further based on the provision of manufacturing methods for such a security element and the provision of a security document provided with the value document.
- a security element for securing value documents comprising a feature substance-containing first polymer which is at least partially surrounded by a second polymer, wherein the first polymer is a hydrophobic, water-insoluble polymer which is at elevated pH and at elevated ambient temperature at a treatment time of less than 60 minutes, preferably less than 30 minutes, is convertible into a hydrophilic, water-soluble polymer, and the second polymer is a hydrophilic, water-soluble polymer, wherein the increased pH greater than 12, preferably greater than 10, and the elevated ambient temperature is greater than 90 ° C, preferably greater than 60 ° C.
- a security element according to any one of paragraphs 1 to 6, wherein the feature substance is a core-shell particle, wherein the core and the shell are preferably based on two different polymers, the shell is more preferably attackable by the action of aqueous bases and the shell is particularly preferably based on a melamine-formaldehyde condensation polymer.
- a security element according to any one of paragraphs 1 to 8, wherein the weight ratio of the feature substance based on the first, hydrophobic, water-insoluble polymer is at least 1: 1, preferably at least 9: 1.
- a further layer in particular a film based on a second polymer, to the layer based on a second polymer provided with the solution of the feature substance and of the first polymer.
- first polymer is a hydrophobic, water-insoluble polymer that is convertible to a hydrophilic, water-soluble polymer at elevated pH and / or elevated ambient temperature
- second polymer is a hydrophilic, water-soluble polymer
- Value documents within the scope of the invention are items such as banknotes, checks, shares, tokens, identity cards, passports, documents and other documents as well as labels.
- the value document substrate does not necessarily have to be a paper substrate, in particular it could be a plastic substrate or a substrate having both paper components and plastic components.
- the present invention makes it possible to provide security elements, such as mottled fibers or planchettes, having feature properties such as UV luminescence, IR absorption or photochromism, which can be introduced into paper or applied to paper during papermaking and have sufficient stability to water and moisture so as not to be destroyed during papermaking. the.
- security elements according to the invention are so unstable that they are destroyed under the more drastic conditions of the paper recycling process, ie at elevated temperature and at elevated pH. For the paper manufacturer, therefore, high cost savings are possible, moreover, the present invention is particularly advantageous in view of the ecological point of view.
- value documents afflicted with production defects or worn value documents can easily be subjected to a conventional paper recycling process because the security elements are completely destroyed in the recycling process.
- water-soluble polymers for example polyvinyl alcohol (PVA), and water-insoluble, hydrolysis-unstable polymers, for example polyvinyl acetate (PVAc).
- PVA polyvinyl alcohol
- PVAc polyvinyl acetate
- the water-soluble polymer is preferably polyvinyl alcohol.
- Polyvinyl alcohol is often a constituent of the paper pulp of documents of value because it is used, for example, in the gluing and therefore does not adversely affect the properties of the paper pulp obtained during recycling.
- the security element is based in particular on a feature-containing first polymer which is completely or partially surrounded by a water-soluble second polymer.
- the water-soluble second polymer ensures the compatibility of the security element with the paper, because it is loosely dissolved on contact with the wet paper pulp or the paper web and promotes the solid installation of the security element in the pulp.
- the second polymer is preferably polyvinyl alcohol or its copolymers, for example polyvinylpyrrolidone-polyvinyl alcohol copolymers or polyvinyl alcohol-polyethylene glycol-graft copolymers.
- polyvinyl alcohol has the best properties for incorporation into pulp, other water-soluble polymers such as polyvinylpyrrolidone are also suitable.
- the first polymer containing the feature substances is expediently sufficiently moisture-stable in order to withstand the incorporation into the paper pulp without being damaged.
- the first polymer is a hydrophobic, water-insoluble polymer, for example polyvinyl acetate or certain polyesters.
- the hydrophobic polymer is characterized in that it can be converted to a hydrophilic polymer by increased pH and / or ambient temperature, e.g. by saponification of ester groups.
- polyvinyl acetate can be gradually saponified to polyvinyl alcohol, which is then water-soluble.
- certain polyesters and other polymers can be cleaved by saponification or other reactions to smaller, lower molecular weight units, thereby destroying the polymer.
- the first, water-insoluble polymer converts in the recycling process so that it corresponds to the second (water-soluble) polymer type.
- the combination of polyvinyl alcohol (PVA) and polyvinyl acetate (PVAc) is particularly preferred because PVAc can easily be hydrolyzed to PVA and therefore no other polymers or polymer degradation products appear in the recycling process in addition to the harmless PVA.
- Security elements according to the invention can be formed in different ways.
- the feature substance can be introduced by extrusion into the first polymer and then coated with the second polymer.
- a solution containing the first polymer and the feature substance can be applied to the second polymer and then covered by another layer of the second polymer.
- the complete encapsulation of the first polymer by the second polymer is advantageous since otherwise sufficient and homogeneous incorporation into the paper substrate can not take place.
- non-both sides covered security elements are added to the pulp, they are not well installed if the randomly distributed security elements touch the paper with their hydrophobic side. When fully wrapped, both sides of the security element are hydrophilic, and always build well into the pulp even when randomly arranged.
- the security element is produced by printing or coating a PVA film with a solvent-based printing lacquer containing PVAc and the feature substance.
- the printed film is laminated with a second PVA film so that no free PVAc surfaces exist. This facilitates the introduction of the later security element, since untreated PVAc, in contrast to PVA, does not have good compatibility with the paper pulp and thus incorporates poorly.
- the security Elements can then be obtained, for example, by cutting or punching out the laminated films.
- the PVAc surface of the isolated security elements is preferably covered by more than 80%, particularly preferably more than 90%, by PVA.
- FIG. 3 shows a further example of the production according to the invention
- FIG. 1, Case A shows an example of the production of security elements according to the invention.
- the PVA film is printed over the entire surface, that is to say for the production of e.g.
- the film may be cut into strips to obtain mottled fibers having the same dimensions of the strips.
- FIG. 1, Case B shows another example of the production of security elements according to the invention.
- the PVA film is printed with a pattern which corresponds to the shape of the later security element.
- a pattern may be printed out of thin strips, which at the end represent the mottling fibers, or other motifs, such as waves, circles or triangles. These can be easily cut out at an appropriate distance from each other. Since the PVA is largely dissolved when introduced into the paper pulp, only the PVAc motif defined by the printing process remains as a visible security element.
- an edge is left free (corresponding to FIG. 1, case B).
- FIG. 2 Case C, shows another example of the production of security elements according to the invention.
- an edge is left in one direction only.
- FIG. 3 Case D, shows a further example of the production of security elements according to the invention.
- lines or other patterns are printed with a skew angle relative to the cutting direction. This ensures that the pattern does not have to be aligned, or in other words, the pattern position is not on the cutting position has to be adjusted.
- a sample spacing unsynchronized relative to the cutting width is selected, for example the distance between two printed lines is 1.01 times that
- Cutting width As a result, e.g. controlled distributions can be generated on random pattern distributions, or it can be prevented that, for example, all imprinted lines of the cutting tool are cut exactly in the middle, as could be the case for a match between pattern spacing and cutting width.
- Typical conditions in paper recycling are elevated temperatures, such as more than 60 ° C, preferably more than 90 ° C, and an elevated pH, for example a pH greater than 8, preferably a pH greater than 10, more preferably a pH greater than 12 at the same time applied high shear forces.
- Typical treatment periods are z; B. a treatment duration of more than 30 min, preferably more than lh.
- complete destruction is taken to mean that, when the paper pulp is used again, no larger components of the security element that are visible to the eye remain, but a homogeneous impression of the paper pulp is achieved.
- the term "complete destruction" means that the iron oxide-containing polymer has essentially completely dissolved and no mottled fiber fragments or the like are more recognizable will still be present and homogeneously distributed in the paper pulp, but as there are usually only very small amounts of security elements relative to the pulp, they will no longer be perceived in a homogeneous distribution, only in places where the feature substance is in a higher concentration, such as In the polymer of the original security element, an increased and thus disturbing after recycling visibility is given.
- the intensity of the feature substance used decreases by more than 50%, preferably by more than 90%.
- the feature substance used is a core-shell particle.
- the core-shell particle is based on two different polymers. More preferably, the polymer of the shell is accessible by the action of bases.
- the type and thickness of the shell is chosen so that the feature substance on the one hand meets the necessary criteria for stability of base, which are necessary for use in documents of value, on the other hand, largely destroyed in the harder conditions of paper recycling.
- the shell is preferably a layer of melamine-formaldehyde condensation polymer. Although melamine-formaldehyde
- Condensation polymers are usually chemically very stable, the stability of the shell can be controlled very well on the thickness thereof, so that here a controlled adjustment of instability against hot aqueous bases is possible.
- the weight ratio of the feature substance used is in particular at least 99: 1, preferably at least 9: 1, particularly preferably at least 1: 1.
- the chain length of the used, surrounding the feature substance first polymer has an impact on the rate of hydrolysis, but also on the processability of the laminated film composite.
- the first polymer in particular has a molecular weight of less than 100,000 g / mol.
- the hydrolysis rate is particularly high.
- the first polymer has a molecular weight of more than 500,000 g / mol.
- the workability is particularly good.
- the first polymer has a molecular weight in a range of 100,000 g / mol to 500,000 g / mol. In this case, a sufficient hydrolysis rate and a good processability are combined. For most applications, this third embodiment is technically advantageous, and therefore particularly preferred over the other two embodiments.
- the PVA film has a thickness in the range of 10 to ⁇ , more preferably in a range of 15 to 60 ⁇ .
- the PVA film is a so-called hot water-soluble PVA, which is a PVA which, in contrast to the so-called cold-water-soluble PVA, does not react at elevated temperature, e.g. above 60 ° C, completely dissolves.
- elevated temperature e.g. above 60 ° C
- the security elements are introduced into the water of the paper machine.
- the security elements are scattered on the moist paper web, for example by using a vibrating trough.
- the coating or printing of the PVA film uses a mixture based on the feature substance and a solution of polyvinyl acetate in an organic solvent.
- the organic solvent is ethyl acetate or acetone.
- the recyclable security elements described herein are combined with other, non-recyclable security elements or designed so that they are only partially recyclable. For example, in accordance with the invention, green mottled fibers according to the invention can be mixed with non-inventive red mottled fibers.
- first (eg green) lines based on a hydrolyzable polymer can be printed and second (eg red) lines can be printed on the basis of a hydrolysis-stable printing ink.
- first (eg green) lines based on a hydrolyzable polymer can be printed and second (eg red) lines can be printed on the basis of a hydrolysis-stable printing ink.
- parts of a safety element from hydrolyzable or hydrolysis-stable constituents.
- a printed flag with three national colors two national colors can be hydrolyzed and one country color can be made resistant to hydrolysis.
- the non-recyclable security elements remain in the paper pulp, or the security elements are partly discolored or discolored. In this way it can be tracked, for example, if the paper mass is recycled material. This is advantageous, for example, to detect plagiarism based on stolen Toiletfabrik- Committee, or on the basis of recycled pulp from shredded banknotes.
- Embodiment 1 blue luminescent mottled fibers
- a P VA film having a thickness of 25 ⁇ m is coated with a solution of 1% by weight of polyvinyl acetate having a molecular weight of 140,000 g / mol, which contains 10% by weight of a UV-activatable blue-luminescent security pigment based on core-shell particles.
- the solvent used is ethyl acetate.
- the coating has a basis weight of 5 grams per square meter.
- the applied layer is covered with a second PVA film having a thickness of 25 microns and laminated by passing a hot metal roller.
- the laminated film composite is subsequently cut into mottled fibers of the size 5 mm ⁇ 1 mm and introduced into the paper stock during papermaking.
- the paper is then recycled (at high shear, at 80 ° C, at a pH of 11, treatment time: 1 hour). From the resulting pulp a new paper is produced. Under UV light no mottled fibers or other abnormalities are more visible.
- a polyamide fiber having the same security pigment as in Embodiment 1 is produced.
- Polyamide fibers are widely used as mottling fibers for banknotes, their preparation is well known. However, they are non-recyclable fibers.
- a paper with mottled fibers recognizable as blue stripes under UV light is obtained.
- the paper is then recycled (high shear, 80 ° C, pH 11, 1 hour). From the resulting pulp a new paper is produced.
- Embodiment 2 green luminescent mottled fibers
- a PVA film with a thickness of 30 ⁇ is printed with a pattern of 5 mm long and 200 ⁇ thick strip.
- the printing ink used is a mixture of acetone and 2 percent by weight of polyvinyl acetate of molecular weight 200,000 g / mol, which contains 5 percent by weight of a UV-activatable, green luminescent security pigment based on core-shell particles.
- the pressure is 5 grams per square meter. After the proof has been dried, it is covered with a second PVA film having a thickness of 30 ⁇ m and laminated by passing a hot metal roller. The laminated film composite is then cut into pieces, each piece containing a strip of the printed stripe pattern, and incorporated into the paper stock during papermaking.
- a PVA film having a thickness of 50 ⁇ m is coated with a solution of 1% by weight of polyvinyl acetate having a molecular weight of 140,000 g / mol, which contains 10% by weight of an IR absorber pigment based on core-shell particles.
- the solvent used is ethyl acetate.
- the coating has a basis weight of 5 grams per square meter.
- the applied layer is covered with a second PVA film having a thickness of 50 microns and laminated by passing a hot metal roller.
- the laminated film composite is subsequently cut into planchettes of the size 5 mm ⁇ 5 mm and introduced into the pulp during papermaking.
- a paper is obtained which, when viewed with suitable equipment, e.g. with an IR sensor for bank notes, corresponding points with IR absorption shows.
- a PVA film having a thickness of 25 ⁇ m is printed with a solution of 1% by weight of polyvinyl acetate having a molecular weight of 140,000 g / mol, which contains 10% by weight of a UV-activatable, red-luminescent security pigment based on core-shell particles ,
- the solvent used is ethyl acetate.
- the print pattern is based on a variety of objects in the form of small fish with a size of about 2 mm x 4 mm.
- the pressure strength has a basis weight of 5 grams per square meter.
- After evaporation of the ethyl acetate, the pressure is covered with a second PVA film having a thickness of 25 ⁇ and laminated by passing a hot metal roller.
- the laminated film composite is then cut into pieces, each piece containing one of the fish-like objects, and placed in the pulp during papermaking.
- Embodiment 5 partially recyclable planchettes
- a PVA film with a thickness of 40 ⁇ is printed with a tricolor pattern of UV luminescent colors, such as a national flag the size 6 mm x 4 mm, which contains the colors blue, white and red.
- the individual flags of the country are 10 mm apart on all sides so that they can be easily separated by cutting the film.
- the blue and white portions of the pattern are printed with a pressure varnish consisting of a combination of luminescent pigment, ethyl acetate and polyvinyl acetate and then dried. The blue and white parts dissolve in the recycling process.
- the red portions of the pattern are printed with a UV-curable printing ink containing the luminescent pigment and cured by UV irradiation. UV-curable printing inks are often used for printing value documents and generally show a very high stability to water and aqueous solutions. The red components are stable compared to the recycling process and thus remain unchanged.
- a security paper which shows multicolored country flags under UV light.
- the paper may also contain other (e.g., forensic) features or have special properties, e.g. haptic properties or optical properties.
- haptic properties or optical properties When such a paper or remnants are recycled from value documents made therefrom, e.g. In order to produce counterfeits, clearly visible red portions of the original multicolored pattern remain in the recy- cled paper. The paper can thus be clearly identified as recycled material of the original security paper, even if the other characteristics (other characteristics, haptic and optical characteristics) are the same as those of the original security paper.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Paper (AREA)
- Credit Cards Or The Like (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102016010196.2A DE102016010196A1 (de) | 2016-08-23 | 2016-08-23 | Sicherheitselement, Verfahren zum Herstellen desselben und Wertdokument |
PCT/EP2017/001003 WO2018036652A1 (de) | 2016-08-23 | 2017-08-22 | Sicherheitselement, verfahren zum herstellen desselben und wertdokument |
Publications (2)
Publication Number | Publication Date |
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EP3504066A1 true EP3504066A1 (de) | 2019-07-03 |
EP3504066B1 EP3504066B1 (de) | 2020-06-24 |
Family
ID=59745246
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP17758797.9A Active EP3504066B1 (de) | 2016-08-23 | 2017-08-22 | Sicherheitselement, verfahren zum herstellen desselben und wertdokument |
Country Status (6)
Country | Link |
---|---|
US (1) | US10576773B2 (de) |
EP (1) | EP3504066B1 (de) |
DE (1) | DE102016010196A1 (de) |
ES (1) | ES2805951T3 (de) |
HU (1) | HUE050144T2 (de) |
WO (1) | WO2018036652A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102016010196A1 (de) * | 2016-08-23 | 2018-03-01 | Giesecke+Devrient Currency Technology Gmbh | Sicherheitselement, Verfahren zum Herstellen desselben und Wertdokument |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008049512A1 (de) | 2008-09-29 | 2010-04-01 | Giesecke & Devrient Gmbh | Sicherheitsmerkmal zu Absicherung von Wertgegenständen |
DE102009025019A1 (de) * | 2009-06-10 | 2010-12-16 | Giesecke & Devrient Gmbh | Sicherheitsmerkmal und Verfahren zur Herstellung eines Sicherheitsmerkmals |
DE102009040747B3 (de) | 2009-09-08 | 2011-07-21 | Bundesdruckerei GmbH, 10969 | Bilumineszente Melierfasern, eine diese aufweisende Folie, Dokument mit diesen sowie Verfahren zu ihrer Herstellung und ein Verfahren zur Herstellung eines Dokuments mit diesen |
DE102010026627A1 (de) * | 2010-07-09 | 2012-01-12 | Giesecke & Devrient Gmbh | Alkalimetall-und Erdalkalimetall-Niobate und -Tantalate als Sicherheitmerkmalsstoffe |
DE102016010196A1 (de) * | 2016-08-23 | 2018-03-01 | Giesecke+Devrient Currency Technology Gmbh | Sicherheitselement, Verfahren zum Herstellen desselben und Wertdokument |
-
2016
- 2016-08-23 DE DE102016010196.2A patent/DE102016010196A1/de not_active Withdrawn
-
2017
- 2017-08-22 US US16/326,992 patent/US10576773B2/en active Active
- 2017-08-22 HU HUE17758797A patent/HUE050144T2/hu unknown
- 2017-08-22 ES ES17758797T patent/ES2805951T3/es active Active
- 2017-08-22 WO PCT/EP2017/001003 patent/WO2018036652A1/de unknown
- 2017-08-22 EP EP17758797.9A patent/EP3504066B1/de active Active
Also Published As
Publication number | Publication date |
---|---|
WO2018036652A1 (de) | 2018-03-01 |
ES2805951T3 (es) | 2021-02-16 |
US20190168530A1 (en) | 2019-06-06 |
EP3504066B1 (de) | 2020-06-24 |
DE102016010196A1 (de) | 2018-03-01 |
HUE050144T2 (hu) | 2020-11-30 |
US10576773B2 (en) | 2020-03-03 |
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