EP3392054A1 - Polymeric valuable document substrate, security element, valuable document and method of manufacturing - Google Patents
Polymeric valuable document substrate, security element, valuable document and method of manufacturing Download PDFInfo
- Publication number
- EP3392054A1 EP3392054A1 EP18000368.3A EP18000368A EP3392054A1 EP 3392054 A1 EP3392054 A1 EP 3392054A1 EP 18000368 A EP18000368 A EP 18000368A EP 3392054 A1 EP3392054 A1 EP 3392054A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- layer
- polymeric
- liquid crystal
- crystal material
- value document
- 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
- 239000000758 substrate Substances 0.000 title claims abstract description 88
- 238000004519 manufacturing process Methods 0.000 title claims description 17
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 68
- 230000010076 replication Effects 0.000 claims abstract description 62
- 239000000463 material Substances 0.000 claims abstract description 61
- 239000000975 dye Substances 0.000 claims description 41
- 239000000049 pigment Substances 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 17
- 229910052751 metal Inorganic materials 0.000 claims description 15
- 239000002184 metal Substances 0.000 claims description 15
- 229920000642 polymer Polymers 0.000 claims description 9
- 230000010287 polarization Effects 0.000 claims description 7
- 239000002131 composite material Substances 0.000 claims description 6
- 230000003287 optical effect Effects 0.000 claims description 5
- 238000005286 illumination Methods 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 165
- 229920000092 linear low density polyethylene Polymers 0.000 description 10
- 239000004707 linear low-density polyethylene Substances 0.000 description 10
- 239000002966 varnish Substances 0.000 description 9
- 230000000873 masking effect Effects 0.000 description 7
- 238000007639 printing Methods 0.000 description 7
- 229910052709 silver Inorganic materials 0.000 description 7
- 239000004332 silver Substances 0.000 description 7
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 6
- 239000011127 biaxially oriented polypropylene Substances 0.000 description 6
- 229920006378 biaxially oriented polypropylene Polymers 0.000 description 6
- 239000002178 crystalline material Substances 0.000 description 6
- -1 for example Substances 0.000 description 6
- 238000007646 gravure printing Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 230000005855 radiation Effects 0.000 description 5
- 238000007650 screen-printing Methods 0.000 description 5
- 239000012790 adhesive layer Substances 0.000 description 4
- 238000004132 cross linking Methods 0.000 description 4
- 238000001465 metallisation Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 229920000106 Liquid crystal polymer Polymers 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 3
- 229920000139 polyethylene terephthalate Polymers 0.000 description 3
- 239000005020 polyethylene terephthalate Substances 0.000 description 3
- 239000000741 silica gel Substances 0.000 description 3
- 229910002027 silica gel Inorganic materials 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 2
- 239000004971 Cross linker Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- ZYGHJZDHTFUPRJ-UHFFFAOYSA-N coumarin Chemical compound C1=CC=C2OC(=O)C=CC2=C1 ZYGHJZDHTFUPRJ-UHFFFAOYSA-N 0.000 description 2
- 238000004049 embossing Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000007850 fluorescent dye Substances 0.000 description 2
- 239000004922 lacquer Substances 0.000 description 2
- 230000031700 light absorption Effects 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 239000002985 plastic film Substances 0.000 description 2
- 229920006255 plastic film Polymers 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 229920003207 poly(ethylene-2,6-naphthalate) Polymers 0.000 description 2
- 229920001707 polybutylene terephthalate Polymers 0.000 description 2
- 239000011112 polyethylene naphthalate Substances 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000007740 vapor deposition Methods 0.000 description 2
- FCNCGHJSNVOIKE-UHFFFAOYSA-N 9,10-diphenylanthracene Chemical compound C1=CC=CC=C1C(C1=CC=CC=C11)=C(C=CC=C2)C2=C1C1=CC=CC=C1 FCNCGHJSNVOIKE-UHFFFAOYSA-N 0.000 description 1
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- NOWKCMXCCJGMRR-UHFFFAOYSA-N Aziridine Chemical compound C1CN1 NOWKCMXCCJGMRR-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004977 Liquid-crystal polymers (LCPs) Substances 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- VXAUWWUXCIMFIM-UHFFFAOYSA-M aluminum;oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[Al+3] VXAUWWUXCIMFIM-UHFFFAOYSA-M 0.000 description 1
- 239000001000 anthraquinone dye Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000000987 azo dye Substances 0.000 description 1
- 229910001593 boehmite Inorganic materials 0.000 description 1
- 150000001718 carbodiimides Chemical class 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229960000956 coumarin Drugs 0.000 description 1
- 235000001671 coumarin Nutrition 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 125000004386 diacrylate group Chemical group 0.000 description 1
- GYZLOYUZLJXAJU-UHFFFAOYSA-N diglycidyl ether Chemical compound C1OC1COCC1CO1 GYZLOYUZLJXAJU-UHFFFAOYSA-N 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 150000007518 monoprotic acids Chemical class 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 229910001120 nichrome Inorganic materials 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920003009 polyurethane dispersion Polymers 0.000 description 1
- 125000005624 silicic acid group Chemical class 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 150000003378 silver Chemical class 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Images
Classifications
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- 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
- B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
- B42D25/24—Passports
-
- 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
- B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
- B42D25/29—Securities; Bank notes
-
- 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
- B42D25/324—Reliefs
-
- 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
- B42D25/328—Diffraction gratings; Holograms
-
- 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
- B42D25/351—Translucent or partly translucent parts, e.g. windows
-
- 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
- B42D25/355—Security threads
-
- 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
- B42D25/364—Liquid crystals
-
- 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
- B42D25/373—Metallic materials
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- 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
- B42D25/391—Special inks absorbing or reflecting polarised 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
- B42D25/405—Marking
- B42D25/425—Marking by deformation, e.g. embossing
-
- 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
Definitions
- the invention relates to a polymeric value document substrate, a security element for securing value documents, a value document and a method for producing the polymeric value document substrate and the security element.
- a value document may in particular be banknotes, but also shares, certificates, stamps, checks, tickets, tickets, air tickets, security paper and the like.
- Security elements for securing value documents are in particular security threads, security strips or security patches or security labels.
- the EP 2508358 A1 describes a doped with a dichroic dye liquid crystalline material in the form of a layer that emits in fluorescence linearly polarized light, to secure a value document. The observer can perceive hidden motives when viewing with polarized light, both when viewing the front and the back.
- a sheet-like polymeric material is preferably first printed with a dye-receiving layer, for example by means of a gravure printing machine.
- the ink accepting layer may preferably be printed on the polymeric value document substrate such that there are recesses for creating see-through windows in the ink accepting layer.
- a plurality of ink accepting layers may be printed, such as in U.S. Pat WO 2010/130755 A2 described.
- the ink-accepting layer is in particular an opaque, printable and printable color coat.
- the ink for forming the ink receiving layer is preferably based on a filler, eg, silica gel, a crosslinker and a binder.
- a filler eg, silica gel
- a crosslinker for example, polyvinyl alcohol, modified polyvinyl alcohol, polyurethane dispersions, acrylate dispersions, as well as derivatives or mixtures thereof are used.
- the crosslinker can be chosen in particular from the substance class isocyanate, aziridine, carbodiimide or glycidyl ether.
- additives for example flow additives, deaerators and / or monoprotic acids, may be present.
- the filler may be a pigment or a mixture of several pigments of the group consisting of boehmite, pseudo-boehmite, zeolite and Al 2 O 3 .
- pigments may contain to increase opacity be, for example, TiO 2 , BaSO 4 , CaCO 3 , silicic acids, or polymer-based hollow sphere pigments such as "ROPAQUE" from Rohm & Haas or effect pigments that produce a pearlescent or a metallic luster.
- a replication layer is then applied to the ink receiving layer provided with the ink receiving layer in the area of the recesses of the ink receiving layer, e.g. a UV varnish.
- the replication layer is provided in a subsequent step with a relief structure, in particular by means of embossing.
- the replication layer provided with a relief structure can be applied in any application or printing method, e.g. by means of an inkjet, gravure, flexographic or screen printing process, a liquid crystal material doped with at least one dichroic dye is applied.
- the application of the liquid-crystalline substance can be carried out in particular from the melt at elevated temperature or with the aid of a solvent at room temperature.
- the liquid-crystalline layer doped with at least one dichroic dye is aligned by means of the relief structure impressed into the replication layer and can be crosslinked by UV radiation.
- the crosslinking of the liquid-crystalline layer preferably proceeds in an inertized state, the proportion of the residual oxygen should be in particular less than 1000 ppm.
- additional layers may be applied to facilitate further optical effects.
- a reflection layer based on platelet-shaped metal pigments can be produced, wherein the platelet-shaped metal pigments preferably are such that they align spatially along the relief structure of an embossing lacquer layer.
- the metal pigments are based, in particular, on a metal selected from the group consisting of aluminum, stainless steel, nichrome, gold, silver, platinum and copper, preferably on aluminum, where the average particle diameter is preferably in a range from 2 ⁇ m to 50 ⁇ m, more preferably in one Range of 5 microns to 15 microns.
- the metallization obtained in this way appears in the form of a silver mirror layer.
- Platelet-shaped metal pigments are for example from WO 2013/186167 A2 .
- WO 2010/069823 A1 WO 2005/051675 A2 (See, for example, the description on page 11, line 10, to page 12, penultimate paragraph) and WO 2011/064162 A2 known.
- Platelet-shaped metal pigments have the advantage that they conform to a substrate having a relief structure, in particular a relief with microstructures and / or nanostructures, so well that the difference to a conventional metallization obtainable by vapor deposition is almost no longer recognizable.
- the simple, technical printing production of the reflection layer makes it possible to dispense with complex process steps, such as printing the substrate with a soluble wash in the form of a desired recess within the reflective layer to be generated, generating a metallization by vapor deposition and washing the washing color together with the above the washing paint applied metallization.
- the metal pigment compositions eg, yellow
- the reflection layer based on platelet-shaped metal pigments described above is particularly suitable in the case of an underlying, with insufficient edge sharpness arranged liquid crystal layer as a mask for masking the areas of the deficient liquid crystal layer.
- the application of the reflective layer based on platelet-shaped metal pigments as a mask is merely optional.
- the ink accepting layer itself may be used.
- a part of the ink-accepting layer can be applied to the polymeric substrate in the form of a first ink-accepting layer before the application of the liquid-crystalline material (in particular before the application of the replication layer).
- Another portion of the ink accepting layer may be printed after application of the replication layer and the liquid crystalline material in the form of a second ink accepting layer for masking the portions of the edge sharpness liquid crystal layer.
- the measure of disposing the first ink accepting layer before applying the liquid crystal layer is further associated with the advantage that when viewing the polymeric value document substrate from the side opposite the ink accepting layer, i. E. When viewed through the substrate, a visually appealing boundary of the liquid-crystalline region can be generated.
- the polymeric value document substrate prepared in this manner may be coated in optional further steps with further layers, e.g. a primer layer, a protective lacquer or a thin protective film, are provided.
- further layers e.g. a primer layer, a protective lacquer or a thin protective film
- Suitable dichroic dyes for use in liquid crystal polymer networks are known in the art.
- the dichroic dye may have a functional group which enables the dye to be incorporated into the network.
- An example is dyes having an acrylate head group (which can be incorporated, for example, into the network of liquid crystal diacrylates).
- the Absorb dichroic dye in the visible wavelength range but also show fluorescence and be excitable eg with UV light. Liquid crystals on their own show no noticeable light absorption or light reflection. The light absorption is determined by the dichroic dye.
- Suitable examples are fluorescent dyes with polarized fluorescence, such as fluorescent dyes with a 9,10-Diphenylanthracen fluorophore or a coumarin fluorophore.
- fluorescent dyes with polarized fluorescence such as fluorescent dyes with a 9,10-Diphenylanthracen fluorophore or a coumarin fluorophore.
- a blue anthraquinone dye and a red azo dye for incorporation into liquid crystalline polymer networks are disclosed, for example, in U.S. Pat WO 02/37147 A1 described.
- Suitable polymeric supports upon which the novel polymeric value document substrate is based are known in the art.
- BOPP films are suitable, especially in the form of coextruded laminates such as an LLDPE / BOPP / LLDPE film, in particular two or three such films may be hot laminated to form a LLDPE / BOPP / LLDPE / LLDPE / BOPP / LLDPE layer sequence or the like to build.
- Suitable polymeric carriers are further a film / paper / film composite substrate, see, for example, U.S. Pat WO 2004/028825 A2 , or a paper / foil / paper composite substrate.
- the above-described method for producing a polymeric value document substrate is also suitable for producing security elements for securing value documents, in particular film-like security elements such as security threads, film strips, patches or labels.
- security element is based in particular on a plastic film on which an optional ink-receiving layer is applied.
- Such a security element can be applied, for example, by means of an adhesive layer (such as a heat seal adhesive layer) directly on a security document to be secured or prepared on a separate carrier as a transfer element.
- Plastics such as PET are used for the film material (Polyethylene terephthalate), PBT (polybutylene terephthalate), PEN (polyethylene naphthalate), PP (polypropylene), PA (polyamide) and PE (polyethylene).
- This sheet material may also be monoaxially or biaxially stretched.
- PET as a plastic film for the production of security elements is preferred.
- FIG. 1 shows a polymeric value document substrate 1 according to the invention, which is suitable for the production of a banknote.
- the value document substrate is based on a polymeric support, in this case a polymer film with the layer sequence LLDPE / BOPP / LLDPE / LLDPE / BOPP / LLDPE.
- the value document substrate 1 has a see-through window area 2 with a hidden motif, which is visible to the viewer when illuminated with polarized light with the naked eye. Depending on the rotation of the polarization direction of the polarized light different motives are perceptible. In the area outside the see-through window 2, the value document substrate 1 is provided with a white, opaque ink acceptance layer.
- FIGS. 2 to 4 each illustrate in cross-sectional view the production of the in the FIG. 1 shown polymeric value document substrate 1 according to a first embodiment.
- the polymeric carrier 3 is first provided with a dye accepting layer 4 by means of a gravure printing process.
- the ink accepting layer 4 is available from a printing ink based on silica gel, a crosslinking agent, a leveling additive and a binder, and has a recess in the central area.
- the polymeric carrier 3 is provided with a UV varnish in a subsequent step.
- the UV varnish is then a Embossed relief structure in order to obtain in this way provided with an embossed relief structure replication layer 5.
- a further ink-receiving layer 6 is applied so as to cover the ink-receiving layer 4 underneath and partly the replication layer 5 provided with an embossed relief structure.
- the additional ink receiving layer 6 is merely preferred and serves as a kind of mask for masking registration variations between the ink accepting layer 4, the replication layer 5 provided with an embossed relief structure, and the liquid crystal layer still to be applied.
- the application of a liquid crystal material layer 7 doped with a dichroic dye takes place by means of a screen printing process.
- the application of the liquid-crystalline substance takes place from the melt at elevated temperature.
- the temperature is adjusted according to the nature of the liquid crystalline material and the temperature stability of the web-shaped polymeric material, for example in a range of 70 ° C to 110 ° C.
- the liquid-crystalline layer 7 doped with at least one dichroic dye is aligned by means of the relief structure impressed into the replication layer 5 and can be crosslinked by UV radiation.
- FIG. 6 shows the see-through window area 2 of the polymeric value document substrate 1 when illuminated with polarized light.
- polarized light eg when illuminated by means of a mobile phone or notebook display
- the observer perceives a hitherto hidden motif with the naked eye.
- the black hatched area is for the viewer eg in the color dark blue or dark red perceptible, the white area shown in the color light blue or bright red.
- the illumination can of course also be done with unpolarized light, the viewer viewing the see-through window area 2 by means of a polarizer.
- FIG. 7 shows the see-through window area 2 of the polymeric value document substrate 1 when illuminated with polarized light, wherein the polarization direction of the polarized light compared to the polarization direction of the in FIG. 6 rotated representation is shown. From the FIGS. 6 and 7 It can be seen that the observer perceives a different appearance depending on the rotation of the polarization direction of the polarized light.
- FIG. 5 shows a novel polymeric value document substrate according to a second embodiment.
- the additional ink-receiving layer 6 is coated so as to cover the underlying ink-receiving layer 4 and partially the liquid crystal material layer 7 doped with a dichroic dye.
- the additional ink-receiving layer 6 serves as a mask for masking registration variations between the ink-receiving layer 4 and the liquid-crystalline layer 7.
- the polymeric value-document substrate shown is used in such a way that the polymeric carrier 3 is first provided with a dye-receiving layer 4 by means of a gravure printing process.
- the polymeric carrier 3 is provided with a UV varnish in a subsequent step.
- a relief structure is then impressed into the UV varnish, in order to obtain in this way a replication layer 5 provided with an embossed relief structure.
- applying one with a dichroic dye doped liquid crystal material layer 7 by means of a screen printing method the alignment of the doped with a dichroic dye liquid crystal layer 7 by means of embossed into the replication layer 5 relief structure and the crosslinking by UV radiation.
- the further ink-receiving layer 6 is coated so as to cover the underlying ink-receiving layer 4 and partially the liquid crystal material layer 7 doped with a dichroic dye.
- FIG. 8 shows a novel polymeric value document substrate according to a third embodiment.
- the polymeric value-document substrates shown in which two ink-receiving layers are present are disclosed in US Pat FIG. 8 only a paint receiving layer 4 before.
- a silver reflection layer 8 which can be obtained by printing is used.
- the reflection layer 8 is based on platelet-shaped metal pigments and is preferably produced in pattern form.
- the polymeric value-document substrate shown is used in such a way that the polymeric carrier 3 is first provided with a dye-receiving layer 4 by means of a gravure printing process.
- the polymeric carrier 3 is provided with a UV varnish in a subsequent step.
- a relief structure is then impressed into the UV varnish, in order to obtain in this way a replication layer 5 provided with an embossed relief structure.
- the printing of a composition based on platelet-shaped metal pigments is carried out to produce a silver reflection layer 8 in this way.
- the reflection layer 8 is formed so as to cover the ink accepting layer 4 located thereunder and partly the replication layer 5 provided with an impressed relief structure.
- FIG. 9 shows a novel polymeric value document substrate according to a fourth embodiment.
- the silver reflective layer 8 is printed so that it covers the underlying ink-accepting layer 4 and partially the liquid crystal material layer 7 doped with a dichroic dye.
- the silver reflection layer 8 serves as a mask for masking registration variations between the ink accepting layer 4 and the liquid crystal layer 7.
- the polymeric value-document substrate shown is used in such a way that the polymeric carrier 3 is first provided with a dye-receiving layer 4 by means of a gravure printing process.
- the polymeric carrier 3 is provided with a UV varnish in a subsequent step.
- a relief structure is then impressed into the UV varnish, in order to obtain in this way a replication layer 5 provided with an embossed relief structure.
- applying a liquid crystal material layer 7 doped with a dichroic dye by means of a screen printing method aligning the liquid crystal layer 7 doped with a dichroic dye by means of the relief structure embossed in the replication layer 5 and crosslinking by UV radiation.
- the silver reflective layer 8 based on platelet-shaped metal pigments is printed so as to cover the underlying ink-accepting layer 4 and partially the liquid crystal material layer 7 doped with a dichroic dye.
- FIG. 10 1 illustrates a banknote 9 based on a paper substrate 10 with security elements according to the invention, namely a security patch 11 bonded to the paper substrate 10 by means of an adhesive layer and a security strip 12 adhered to the paper substrate 10 by means of an adhesive layer.
- Both the security patch 11 and the security strip 12 may each have an analogous structure, as in one of FIGS. 4 . 5 . 8 or 9 is shown.
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Abstract
Die Erfindung betrifft ein polymeres Wertdokumentsubstrat oder Sicherheitselement, aufweisend einen polymeren Träger, der in einem vorbestimmten Bereich in der Reihenfolge mit einer Replikationsschicht und einer mit mindestens einem dichroitischen Farbstoff dotierten Flüssigkristallmaterialschicht versehen ist, wobei in die der Flüssigkristallmaterialschicht zugewandten Oberfläche der Replikationsschicht eine die mit dichroitischem Farbstoff dotierte Flüssigkristallmaterialschicht ausrichtende Reliefstruktur eingeprägt ist und die eingeprägte Reliefstruktur mindestens zwei Bereiche mit unterschiedlichen Orientierungsrichtungen aufweist. The invention relates to a polymeric value document substrate or security element comprising a polymeric support provided in a predetermined area in sequence with a replication layer and a liquid crystal material layer doped with at least one dichroic dye, wherein the surface of the replication layer facing the liquid crystal material layer is one with dichroic Dye-doped liquid crystal material layer aligning relief structure is embossed and embossed relief structure has at least two areas with different orientation directions.
Description
Die Erfindung betrifft ein polymeres Wertdokumentsubstrat, ein Sicherheitselement zur Absicherung von Wertdokumenten, ein Wertdokument und ein Verfahren zum Herstellen des polymeren Wertdokumentsubstrats und des Sicherheitselements.The invention relates to a polymeric value document substrate, a security element for securing value documents, a value document and a method for producing the polymeric value document substrate and the security element.
Bei einem Wertdokument im Sinne der Erfindung kann es sich insbesondere um Banknoten, aber auch um Aktien, Urkunden, Briefmarken, Schecks, Eintrittskarten, Fahrkarten, Flugscheine, Sicherheitspapier und Ähnliches handeln.In the context of the invention, a value document may in particular be banknotes, but also shares, certificates, stamps, checks, tickets, tickets, air tickets, security paper and the like.
Sicherheitselemente zur Absicherung von Wertdokumenten sind insbesondere Sicherheitsfäden, Sicherheitsstreifen oder Sicherheitspatche bzw. Sicherheitsetiketten.Security elements for securing value documents are in particular security threads, security strips or security patches or security labels.
Polymere Wertdokumentsubstrate zur Herstellung von Wertdokumenten, insbesondere Banknoten, sind im Stand der Technik bekannt, siehe z.B.
Weiterhin ist es bekannt, Wertdokumente oder Sicherheitselemente zur Absicherung von Wertdokumenten mit Sicherheitsmerkmalen auf Grundlage von flüssigkristallinem Material auszustatten, siehe z.B.
Die
Für doppelseitige Durchsichtselemente, wie z.B. in der
Der Erfindung liegt daher die Aufgabe zugrunde, ein verbessertes polymeres Wertdokumentsubstrat zur Herstellung von Wertdokumenten, ein verbessertes Sicherheitselement zur Absicherung von Wertdokumenten, ein auf dem polymeren Wertdokumentsubstrat basierendes Wertdokument, ein das Sicherheitselement enthaltendes Wertdokument und Verfahren zum Herstellen des polymeren Wertdokumentsubstrats und des Sicherheitselements bereitzustellen.It is therefore an object of the present invention to provide an improved polymeric value document substrate for making value documents, an improved security document security document, a value document based on the polymeric value document substrate, a security document containing value document, and methods of making the polymeric value document substrate and security element.
Diese Aufgaben werden durch die Merkmale der unabhängigen Ansprüche gelöst. Weiterbildungen sind Gegenstand der Unteransprüche.These objects are achieved by the features of the independent claims. Further developments are the subject of the dependent claims.
- 1. (Erster Aspekt der Erfindung) Polymeres Wertdokumentsubstrat oder Sicherheitselement, aufweisend einen polymeren Träger, der in einem vorbestimmten Bereich in der Reihenfolge mit einer Replikationsschicht und einer mit mindestens einem dichroitischen Farbstoff dotierten Flüssigkristallmaterialschicht versehen ist, wobei in die der Flüssigkristallmaterialschicht zugewandten Oberfläche der Replikationsschicht eine die mit dichroitischem Farbstoff dotierte Flüssigkristallmaterialschicht ausrichtende Reliefstruktur eingeprägt ist und die eingeprägte Reliefstruktur mindestens zwei Bereiche mit unterschiedlichen Orientierungsrichtungen aufweist.1. (First aspect of the invention) A polymeric value document substrate or security element comprising a polymeric support disposed in a predetermined area in sequence with a replication layer and a security layer is provided with at least one dichroic dye-doped liquid crystal material layer, wherein in the liquid crystal material layer facing surface of the replication layer embossed with the doped dichroic dye liquid crystal material layer relief structure is embossed and the embossed relief structure has at least two regions with different orientation directions.
- 2. (Bevorzugte Ausgestaltung) Polymeres Wertdokumentsubstrat oder Sicherheitselement nach Klausel 1, wobei die in die Replikationsschicht eingeprägte Reliefstruktur mindestens zwei Bereiche mit orthogonal zueinander angeordneten Orientierungsrichtungen aufweist.2. (Preferred Embodiment) Polymeric value document substrate or security element according to Clause 1, wherein the relief structure impressed into the replication layer has at least two regions with orientation directions arranged orthogonally to one another.
- 3. (Bevorzugte Ausgestaltung) Polymeres Wertdokumentsubstrat oder Sicherheitselement nach Klausel 1, wobei die in die Replikationsschicht eingeprägte Reliefstruktur mindestens drei Bereiche mit unterschiedlichen Orientierungsrichtungen aufweist, wobei die drei Orientierungsrichtungen relativ zueinander Winkel annehmen, die insbesondere von der Gruppe bestehend aus 0°, 45°, 90° und 135° gewählt sind.3. (Preferred Embodiment) A polymeric value document substrate or security element according to clause 1, wherein the relief structure embossed in the replication layer has at least three regions with different orientation directions, the three orientation directions taking angles relative to each other, in particular from the group consisting of 0 °, 45 ° , 90 ° and 135 ° are selected.
- 4. (Bevorzugte Ausgestaltung) Polymeres Wertdokumentsubstrat oder Sicherheitselement nach Klausel 1, wobei die in die Replikationsschicht eingeprägte Reliefstruktur mindestens vier Bereiche mit unterschiedlichen Orientierungsrichtungen aufweist, wobei die vier Orientierungsrichtungen relativ zueinander insbesondere die Winkel 0°, 45°, 90° und 135° annehmen.4. (Preferred Embodiment) A polymeric value document substrate or security element according to clause 1, wherein the relief structure embossed in the replication layer has at least four regions with different orientation directions, the four orientation directions relative to each other taking in particular the angles 0 °, 45 °, 90 ° and 135 ° ,
- 5. (Bevorzugte Ausgestaltung) Polymeres Wertdokumentsubstrat oder Sicherheitselement nach einer der Klauseln 1 bis 4, wobei die in die Replikationsschicht eingeprägte, mehrere Bereiche mit unterschiedlichen Orientierungsrichtungen aufweisende und die mit dichroitischem Farbstoff dotierte Flüssigkristallmaterialschicht ausrichtende Reliefstruktur ein verstecktes Motiv in der mit dichroitischem Farbstoff dotierten Flüssigkristallmaterialschicht erzeugt, das für den Betrachter bei Beleuchtung mit polarisiertem Licht mit bloßem Auge erkennbar ist.5. (Preferred Embodiment) A polymer value document substrate or security element according to any one of clauses 1 to 4, wherein the relief structure embossed in the replication layer, having a plurality of regions of different orientation directions and aligning the dichroic dye-doped liquid crystal material layer, is a hidden one Motivated in the dichroic dye-doped liquid crystal material layer, which is visible to the viewer when illuminated with polarized light to the naked eye.
- 6. (Bevorzugte Ausgestaltung) Polymeres Wertdokumentsubstrat oder Sicherheitselement nach einer der Klauseln 1 bis 4, wobei die in die Replikationsschicht eingeprägte, mehrere Bereiche mit unterschiedlichen Orientierungsrichtungen aufweisende und mit dichroitischem Farbstoff dotierte Flüssigkristallmaterialschicht ausrichtende Reliefstruktur mindestens zwei versteckte Motive in der mit dichroitischem Farbstoff dotierten Flüssigkristallmaterialschicht erzeugt, die für den Betrachter bei Beleuchtung mit polarisiertem Licht mit bloßem Auge durch Drehung der Polarisationsrichtung des polarisierten Lichts erkennbar sind.6. (Preferred Embodiment) A polymeric value document substrate or security element according to any one of clauses 1 to 4, wherein the liquid crystal material layer embossed relief structure embossed in the replication layer and having a plurality of differently orientated directions and doped with dichroic dye has at least two hidden motifs in the dichroic dye-doped liquid crystal material layer which are visible to the viewer when illuminated with polarized light to the naked eye by rotation of the polarization direction of the polarized light.
- 7. (Bevorzugte Ausgestaltung) Polymeres Wertdokumentsubstrat oder Sicherheitselement nach einer der Klauseln 1 bis 6, wobei die Flüssigkristallmaterialschicht mit unterschiedlichen dichroitischen Farbstoffen dotiert ist, wobei vorzugsweise unterschiedlich ausgerichtete Flüssigkristallmaterialschicht-Bereiche unterschiedliche dichroitische Farbstoffe aufweisen.7. (Preferred Embodiment) A polymeric value document substrate or security element according to any one of clauses 1 to 6, wherein the liquid crystal material layer is doped with different dichroic dyes, preferably differently oriented liquid crystal material layer regions having different dichroic dyes.
- 8. (Bevorzugte Ausgestaltung) Polymeres Wertdokumentsubstrat oder Sicherheitselement nach einer der Klauseln 1 bis 7, wobei die in die Replikationsschicht eingeprägte, mindestens zwei Bereiche mit unterschiedlichen Orientierungsrichtungen aufweisende und die mit dichroitischem Farbstoff dotierte Flüssigkristallmaterialschicht ausrichtende Reliefstruktur eine diffraktive Struktur ist.8. (Preferred Embodiment) A polymeric value document substrate or security element according to any one of clauses 1 to 7, wherein the relief structure embossed in the replication layer, having at least two regions of different orientation directions and the dichroic dye-doped liquid crystal material layer, is a diffractive structure.
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9. (Bevorzugte Ausgestaltung) Polymeres Wertdokumentsubstrat oder Sicherheitselement nach Klausel 8, wobei die diffraktive Struktur einen ersten Bereich zur Orientierung von Flüssigkristallmaterial aufweist, der von der Flüssigkristallmaterialschicht bedeckt ist, und einen zweiten Bereich zur Erzeugung eines optischen Beugungseffekts, insbesondere zur Erzeugung eines Hologramms, aufweist.9. (Preferred Embodiment) A polymeric value document substrate or security element according to
clause 8, wherein the diffractive structure has a first region for orientation of liquid crystal material derived from the Liquid crystal material layer is covered, and a second region for generating a diffractive optical effect, in particular for generating a hologram has. -
10. (Bevorzugte Ausgestaltung) Polymeres Wertdokumentsubstrat oder Sicherheitselement nach Klausel 8 oder 9, wobei die diffraktive Struktur einen Bereich aufweist, in dem die diffraktive Struktur aus einer Überlagerung einer Grobstruktur zur Erzeugung eines optischen Effekts mit einer Feinstruktur höherer Spatialfrequenz zur Orientierung des Flüssigkristallmaterials gebildet ist, wobei die Feinstruktur insbesondere mit einer Periode von weniger als 400 nm gebildet ist und die Grobstruktur insbesondere mit einer Periode von 500 nm bis 1 Mikrometer gebildet ist.10. (Preferred Embodiment) A polymeric value document substrate or security element according to
8 or 9, wherein the diffractive structure has a region in which the diffractive structure is formed from a superposition of a coarse structure to produce an optical effect having a fine structure of higher spatial frequency for orientation of the liquid crystal material In particular, the fine structure is formed with a period of less than 400 nm and the coarse structure is formed, in particular, with a period of 500 nm to 1 micrometer.clause - 11. (Bevorzugte Ausgestaltung) Polymeres Wertdokumentsubstrat oder Sicherheitselement nach einer der Klauseln 1 bis 10, wobei die mit mindestens einem dichroitischen Farbstoff dotierte Flüssigkristallmaterialschicht die Replikationsschicht bereichsweise musterförmig bedeckt.11. (Preferred Embodiment) A polymeric value document substrate or security element according to any one of clauses 1 to 10, wherein the liquid crystal material layer doped with at least one dichroic dye covers the replication layer in a patterned manner.
- 12. (Bevorzugte Ausgestaltung) Polymeres Wertdokumentsubstrat oder Sicherheitselement nach einer der Klauseln 1 bis 11, wobei der polymere Träger außerhalb des vorbestimmten, mit der Replikationsschicht und der Flüssigkristallmaterialschicht versehenen Bereichs eine opake, bedruckbare und drucktechnisch erhältliche Farbschicht aufweist.12. (Preferred Embodiment) A polymeric value document substrate or security element according to any one of clauses 1 to 11, wherein the polymeric support has an opaque, printable and printable color layer outside the predetermined region provided with the replication layer and the liquid crystal material layer.
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13. (Bevorzugte Ausgestaltung) Polymeres Wertdokumentsubstrat oder Sicherheitselement nach Klausel 12, wobei sowohl die opake, bedruckbare und drucktechnisch erhältliche Farbschicht als auch die mit dichroitischem Farbstoff dotierte Flüssigkristallmaterialschicht und/oder die Replikationsschicht zum Teil mit einer musterförmigen, drucktechnisch erhältlichen, auf plättchenförmigen Metallpigmenten basierenden Reflexionsschicht versehen sind.13. (Preferred Embodiment) A polymeric value document substrate or security element according to
clause 12, wherein both the opaque, printable and printable color layer and the dichroic dye-doped liquid crystal material layer and / or the replication layer are partially coated with a patterned, printable, platelet-shaped Metallic pigments based reflective layer are provided. - 14. (Bevorzugte Ausgestaltung) Polymeres Wertdokumentsubstrat oder Sicherheitselement nach einer der Klauseln 1 bis 13, wobei der polymere Träger eine Folie, ein Folie/Papier/Folie-Verbundsubstrat oder ein Papier/ Folie/Papier-Verbundsubstrat ist.14. (Preferred Embodiment) A polymeric value document substrate or security element according to any one of clauses 1 to 13, wherein the polymeric carrier is a film, a film / paper / film composite substrate, or a paper / film / paper composite substrate.
- 15. (Bevorzugte Ausgestaltung) Polymeres Wertdokumentsubstrat nach einer der Klauseln 1 bis 14, wobei das polymere Wertdokumentsubstrat zur Herstellung von Wertdokumenten, insbesondere Banknoten, geeignet ist.15. (Preferred Embodiment) A polymeric value document substrate according to any one of clauses 1 to 14, wherein the polymeric value document substrate is suitable for producing value documents, in particular banknotes.
- 16. (Bevorzugte Ausgestaltung) Sicherheitselement nach einer der Klauseln 1 bis 14, wobei das Sicherheitselement zur Absicherung von Wertdokumenten, insbesondere Banknoten, geeignet ist und bevorzugt ein Sicherheitsfaden, ein Sicherheitsstreifen oder ein Sicherheitspatch ist.16. (Preferred embodiment) Security element according to one of the clauses 1 to 14, wherein the security element is suitable for securing value documents, in particular banknotes, and is preferably a security thread, a security strip or a security patch.
- 17. (Zweiter Aspekt der Erfindung) Wertdokument, insbesondere eine Banknote, umfassend das polymere Wertdokumentsubstrat oder Sicherheitselement nach einer der Klauseln 1 bis 16.17. (Second aspect of the invention) A value document, in particular a banknote, comprising the polymeric value document substrate or security element according to one of the clauses 1 to 16.
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18. (Dritter Aspekt der Erfindung) Verfahren zum Herstellen eines polymeren Wertdokumentsubstrats oder Sicherheitselements nach einer der Klauseln 1 bis 17, umfassend:
- das Bereitstellen eines polymeren Trägers;
- optional das Versehen des polymeren Trägers mit einer Aussparungen aufweisenden, opaken, bedruckbaren Farbschicht;
- das Aufbringen einer Replikationsschicht auf den polymeren Träger;
- das Versehen der der Replikationsschicht mit einer eingeprägten Reliefstruktur, die mindestens zwei Bereiche mit unterschiedlichen Orientierungsrichtungen aufweist und zur Ausrichtung einer mit mindestens einem dichroitischen Farbstoff dotierten Flüssigkristallmaterialschicht geeignet ist;
- das Aufbringen einer mit mindestens einem dichroitischen Farbstoff dotierten Flüssigkristallmaterialschicht auf die die eingeprägte Reliefstruktur aufweisende Replikationsschicht.
- providing a polymeric carrier;
- optionally, providing the polymeric carrier with a recessed, opaque, printable ink layer;
- applying a replication layer to the polymeric support;
- providing the replication layer with an impressed relief structure, the at least two areas with different orientation directions and is suitable for aligning a liquid crystal material layer doped with at least one dichroic dye;
- the application of a liquid crystal material layer doped with at least one dichroic dye onto the replication layer having the embossed relief structure.
- 19. (Bevorzugte Ausgestaltung) Verfahren zum Herstellen eines polymeren Wertdokumentsubstrats oder Sicherheitselements nach Klausel 18, wobei der Schritt des Versehens des polymeren Trägers mit einer Aussparungen aufweisenden, opaken, bedruckbaren Farbschicht zwingend ist und die Replikationsschicht in den Bereichen der Aussparungen der Farbschicht auf den polymeren Träger aufgebracht wird.19. (Preferred Embodiment) A method of making a polymeric value document substrate or security element according to clause 18, wherein the step of providing the polymeric carrier with a recessed, opaque, printable ink layer is mandatory and the replication layer in the areas of the recesses of the color layer on the polymeric Carrier is applied.
- 20. (Bevorzugte Ausgestaltung) Verfahren nach Klausel 19, wobei der Schritt des Versehens des polymeren Trägers mit einer Aussparungen aufweisenden, opaken, bedruckbaren Farbschicht in Form einer ersten Farbschicht erfolgt, die Replikationsschicht in den Bereichen der Aussparungen der ersten Farbschicht auf den polymeren Träger aufgebracht wird, die mit mindestens einem dichroitischen Farbstoff dotierte Flüssigkristallmaterialschicht auf die die eingeprägte Reliefstruktur aufweisende Replikationsschicht aufgebracht wird und eine weitere opake, bedruckbare Farbschicht in Form einer zweiten Farbschicht so auf die erste Farbschicht aufgebracht wird, dass die zweite Farbschicht auch die Flüssigkristallmaterialschicht und/oder die Replikationsschicht zum Teil abdeckt.20. (Preferred Embodiment) The method of clause 19, wherein the step of providing the polymeric support with a recessed, opaque, printable color layer in the form of a first color layer, applies the replication layer in the areas of the recesses of the first color layer to the polymeric substrate is applied to the at least one dichroic dye-doped liquid crystal material layer on the embossed relief structure having replication layer and another opaque, printable ink layer in the form of a second color layer is applied to the first color layer, that the second color layer, the liquid crystal material layer and / or the Partially covering the replication layer.
- 21. (Bevorzugte Ausgestaltung) Verfahren nach Klausel 19, wobei der Schritt des Versehens des polymeren Trägers mit einer Aussparungen aufweisenden, opaken, bedruckbaren Farbschicht erfolgt, die Replikationsschicht in den Bereichen der Aussparungen der Farbschicht auf den polymeren Träger aufgebracht wird, die mit mindestens einem dichroitischen Farbstoff dotierte Flüssigkristallmaterialschicht auf die die eingeprägte Reliefstruktur aufweisende Replikationsschicht aufgebracht wird und eine auf plättchenförmigen Metallpigmenten basierende Reflexionsschicht so aufgebracht wird, dass sie sowohl die opake, bedruckbare Farbschicht als auch die Flüssigkristallmaterialschicht und/oder die Replikationsschicht zum Teil abdeckt.21. (Preferred Embodiment) The method of clause 19, wherein the step of providing the polymeric support is with a recessed, opaque, printable ink layer, applying the replication layer in the areas of the ink layer recesses to the polymeric support having at least one doped dichroic dye Liquid crystal material layer is applied to the embossed relief structure having replication layer and a platelet-shaped metal pigments based reflective layer is applied so that it covers both the opaque, printable ink layer and the liquid crystal material layer and / or the replication layer in part.
In dem erfindungsgemäßen Verfahren zur Herstellung eines polymeren Wertdokumentsubstrats wird ein bahnförmiges polymeres Material vorzugsweise zunächst mit einer Farbannahmeschicht bedruckt, z.B. mittels einer Tiefdruckmaschine. Die Farbannahmeschicht kann vorzugsweise so auf das polymere Wertdokumentsubstrat aufgedruckt werden, dass Aussparungen zur Erzeugung von Durchsichtsfenstern in der Farbannahmeschicht vorliegen. Anstelle einer einzigen Farbannahmeschicht kann alternativ eine Mehrzahl von Farbannahmeschichten aufgedruckt werden, wie z.B. in der
Auf das mit der Farbannahmeschicht versehene bahnförmige polymere Material wird anschließend im Bereich der Aussparungen der Farbannahmeschicht eine Replikationsschicht aufgebracht, z.B. ein UV-Lack. Die Replikationsschicht wird in einem darauffolgenden Schritt mit einer Reliefstruktur versehen, insbesondere mittels Prägen. Auf die mit einer Reliefstruktur versehene Replikationsschicht kann in einem beliebigen Applikations- oder Druckverfahren, z.B. mittels eines Inkjet-, Tiefdruck-, Flexodruck- oder Siebdruckverfahrens, ein mit mindestens einem dichroitischen Farbstoff dotiertes Flüssigkristallmaterial aufgebracht werden. Das Auftragen der flüssigkristallinen Substanz kann insbesondere aus der Schmelze bei erhöhter Temperatur oder mithilfe eines Lösungsmittels bei Raumtemperatur erfolgen. Nach einer gewissen Zeit (z.B. einem Bahnvorschub von etwa 4m bei einer Bahngeschwindigkeit von etwa 100m pro Minute, wobei die Temperatur entsprechend der Art des flüssigkristallinen Materials und der Temperaturstabilität des bahnförmigen polymeren Materials z.B. in einem Bereich von 70°C bis 110°C eingestellt wird) ist die mit mindestens einem dichroitischen Farbstoff dotierte flüssigkristalline Schicht mithilfe der in die Replikationsschicht eingeprägten Reliefstruktur ausgerichtet und kann durch UV-Strahlung vernetzt werden. Die Vernetzung der flüssigkristallinen Schicht verläuft vorzugsweise in einem inertisierten Zustand, der Anteil des Restsauerstoffs sollte insbesondere weniger als 1000ppm betragen.A replication layer is then applied to the ink receiving layer provided with the ink receiving layer in the area of the recesses of the ink receiving layer, e.g. a UV varnish. The replication layer is provided in a subsequent step with a relief structure, in particular by means of embossing. The replication layer provided with a relief structure can be applied in any application or printing method, e.g. by means of an inkjet, gravure, flexographic or screen printing process, a liquid crystal material doped with at least one dichroic dye is applied. The application of the liquid-crystalline substance can be carried out in particular from the melt at elevated temperature or with the aid of a solvent at room temperature. After a certain time (for example, a web feed of about 4 m at a web speed of about 100 m per minute, the temperature is adjusted according to the type of liquid crystalline material and the temperature stability of the web-shaped polymeric material, for example in a range of 70 ° C to 110 ° C. ), the liquid-crystalline layer doped with at least one dichroic dye is aligned by means of the relief structure impressed into the replication layer and can be crosslinked by UV radiation. The crosslinking of the liquid-crystalline layer preferably proceeds in an inertized state, the proportion of the residual oxygen should be in particular less than 1000 ppm.
In optionalen weiteren Schritten können für das Ermöglichen weiterer optischer Effekte zusätzliche Schichten aufgebracht werden. Insbesondere kann drucktechnisch eine auf plättchenförmigen Metallpigmenten basierende Reflexionsschicht erzeugt werden, wobei die plättchenförmigen Metallpigmente bevorzugt so beschaffen sind, dass sie sich räumlich entlang der Reliefstruktur einer Prägelackschicht ausrichten. Die Metallpigmente beruhen insbesondere auf einem von der Gruppe bestehend aus Aluminium, Edelstahl, Nichrome, Gold, Silber, Platin und Kupfer gewählten Metall, vorzugsweise auf Aluminium, wobei der mittlere Teilchendurchmesser bevorzugt in einem Bereich von 2 µm bis 50 µm, weiter bevorzugt in einem Bereich von 5 µm bis 15 µm liegt. Die auf diese Weise erhaltene Metallisierung erscheint in Form einer silbernen Spiegelschicht. Solche plättchenförmigen Metallpigmente sind z.B. aus der
Die oben beschriebene, auf plättchenförmigen Metallpigmenten basierende Reflexionsschicht eignet sich insbesondere im Falle einer darunterliegenden, mit mangelnder Kantenschärfe angeordneten flüssigkristallinen Schicht als Maske für das Maskieren der Bereiche der mit Mängeln behafteten flüssigkristallinen Schicht.The reflection layer based on platelet-shaped metal pigments described above is particularly suitable in the case of an underlying, with insufficient edge sharpness arranged liquid crystal layer as a mask for masking the areas of the deficient liquid crystal layer.
Das Aufbringen der auf plättchenförmigen Metallpigmenten basierenden Reflexionsschicht als Maske ist lediglich optional. Als Maske für das Maskieren der Bereiche der mit mangelnder Kantenschärfe (d.h. mit unregelmäßigen Rändern) behafteten flüssigkristallinen Schicht kann im einfachsten Fall die Farbannahmeschicht selbst verwendet werden. Dabei kann ein Teil der Farbannahmeschicht vor dem Aufbringen des flüssigkristallinen Materials (insbesondere vor dem Aufbringen der Replikationsschicht) in Form einer ersten Farbannahmeschicht auf das polymere Substrat aufgebracht werden. Ein weiterer Teil der Farbannahmeschicht kann nach dem Aufbringen der Replikationsschicht und des flüssigkristallinen Materials in Form einer zweiten Farbannahmeschicht für das Maskieren der Bereiche der mit mangelnder Kantenschärfe behafteten flüssigkristallinen Schicht aufgedruckt werden. Die Maßnahme des Anordnens der ersten Farbannahmeschicht vor dem Auftragen der flüssigkristallinen Schicht ist darüber hinaus mit dem Vorteil verbunden, dass bei der Betrachtung des polymeren Wertdokumentsubstrats von der der Farbannahmeschicht gegenüberliegenden Seite her, d.h. bei Betrachtung durch das Substrat hindurch, eine optisch ansprechende Begrenzung des flüssigkristallinen Bereichs erzeugbar ist.The application of the reflective layer based on platelet-shaped metal pigments as a mask is merely optional. As a mask for masking the regions of the liquid crystalline layer having a lack of edge sharpness (that is, having irregular edges), in the simplest case, the ink accepting layer itself may be used. In this case, a part of the ink-accepting layer can be applied to the polymeric substrate in the form of a first ink-accepting layer before the application of the liquid-crystalline material (in particular before the application of the replication layer). Another portion of the ink accepting layer may be printed after application of the replication layer and the liquid crystalline material in the form of a second ink accepting layer for masking the portions of the edge sharpness liquid crystal layer. The measure of disposing the first ink accepting layer before applying the liquid crystal layer is further associated with the advantage that when viewing the polymeric value document substrate from the side opposite the ink accepting layer, i. E. When viewed through the substrate, a visually appealing boundary of the liquid-crystalline region can be generated.
Das auf diese Weise hergestellte polymere Wertdokumentsubstrat kann in optionalen weiteren Schritten mit weiteren Schichten, z.B. einer Haftvermittlerschicht, einem Schutzlack oder einer dünnen Schutzfolie, versehen werden.The polymeric value document substrate prepared in this manner may be coated in optional further steps with further layers, e.g. a primer layer, a protective lacquer or a thin protective film, are provided.
Geeignete dichroitische Farbstoffe für den Einsatz in flüssigkristallinen Polymernetzwerken sind im Stand der Technik bekannt. Der dichroitische Farbstoff kann insbesondere eine funktionelle Gruppe aufweisen, welche es ermöglicht, den Farbstoff in das Netzwerk einzubauen. Ein Beispiel sind Farbstoffe mit einer Acrylatkopfgruppe (die z.B. in das Netzwerk von Flüssigkristall-Diacrylaten eingebaut werden können). Des Weiteren kann der dichroitische Farbstoff im sichtbaren Wellenlängenbereich absorbieren, aber auch Fluoreszenz zeigen und z.B. mit UV-Licht anregbar sein. Flüssigkristalle für sich genommen zeigen keine auffällige Lichtabsorption oder Lichtreflexion. Die Lichtabsorption wird durch den dichroitischen Farbstoff bestimmt. Geeignet sind z.B. Fluoreszenzfarbstoffe mit polarisierter Fluoreszenz, wie etwa Fluoreszenzfarbstoffe mit einem 9,10-Diphenylanthracen-Fluorophor oder einem Coumarin-Fluorophor. Ein blauer Anthrachinonfarbstoff und ein roter Azofarbstoff für den Einbau in flüssigkristalline Polymernetzwerke werden z.B. in der
Geeignete polymere Träger, auf denen das erfindungsgemäße polymere Wertdokumentsubstrat basiert, sind im Stand der Technik bekannt. Geeignet sind z.B. BOPP-Filme, insbesondere in Form coextrudierter Laminate wie etwa ein LLDPE/BOPP/LLDPE-Film, wobei insbesondere zwei oder drei solcher Filme heißlaminiert sein können, um eine Schichtabfolge LLDPE/ BOPP/ LLDPE/ LLDPE/ BOPP/ LLDPE oder dergleichen zu bilden. Geeignete polymere Träger sind des Weiteren ein Folie/Papier/Folie-Verbundsubstrat, siehe z.B. die
Das vorangehend beschriebene Verfahren zum Herstellen eines polymeren Wertdokumentsubstrats eignet sich aber auch zum Herstellen von Sicherheitselementen zur Absicherung von Wertdokumenten, insbesondere folienartige Sicherheitselemente wie etwa Sicherheitsfäden, Folienstreifen, Patches bzw. Etiketten. Ein solches Sicherheitselement basiert insbesondere auf einer Kunststofffolie, auf der optional eine Farbannahmeschicht aufgebracht ist. Ein solches Sicherheitselement kann z.B. mittels einer Klebschicht (wie etwa eine Heißsiegelklebschicht) direkt auf einem zu sichernden Wertdokument appliziert werden oder auf einem separaten Träger als Transferelement vorbereitet werden. Für das Folienmaterial kommen dabei Kunststoffe wie PET (Polyethylenterephthalat), PBT (Polybutylenterephthalat), PEN (Polyethylennaphthalat), PP (Polypropylen), PA (Polyamid) und PE (Polyethylen) in Betracht. Dieses Folienmaterial kann ferner monoaxial oder biaxial gereckt sein. PET als Kunststofffolie zur Herstellung von Sicherheitselementen wird bevorzugt.However, the above-described method for producing a polymeric value document substrate is also suitable for producing security elements for securing value documents, in particular film-like security elements such as security threads, film strips, patches or labels. Such a security element is based in particular on a plastic film on which an optional ink-receiving layer is applied. Such a security element can be applied, for example, by means of an adhesive layer (such as a heat seal adhesive layer) directly on a security document to be secured or prepared on a separate carrier as a transfer element. Plastics such as PET are used for the film material (Polyethylene terephthalate), PBT (polybutylene terephthalate), PEN (polyethylene naphthalate), PP (polypropylene), PA (polyamide) and PE (polyethylene). This sheet material may also be monoaxially or biaxially stretched. PET as a plastic film for the production of security elements is preferred.
Weitere Vorteile und Ausführungsformen der Erfindung werden anhand der Figuren näher erläutert. Die in den Figuren gezeigten Proportionen, insbesondere Schichtdicken, entsprechen nicht unbedingt den in der Realität vorliegenden Verhältnissen und dienen vornehmlich zur Verbesserung der Anschaulichkeit.Further advantages and embodiments of the invention will be explained in more detail with reference to FIGS. The proportions shown in the figures, in particular layer thicknesses, do not necessarily correspond to the conditions present in reality and serve primarily to improve the clarity.
Es zeigen:
- Figur 1
- ein erfindungsgemäßes polymeres Wertdokumentsubstrat;
- Figuren 2-4
- die Herstellung eines erfindungsgemäßen polymeren Wertdokumentsubstrats gemäß einem ersten Ausführungsbeispiel;
Figur 5- ein erfindungsgemäßes polymeres Wertdokumentsubstrat gemäß einem zweiten Ausführungsbeispiel;
- Figuren 6-7
- den Durchsichtsfensterbereich des polymeren Wertdokumentsubstrats bei Beleuchtung mit polarisiertem Licht, wobei je nach Drehung der Polarisationsrichtung des polarisierten Lichts ein unterschiedliches Erscheinungsbild erkennbar ist;
Figur 8- ein erfindungsgemäßes polymeres Wertdokumentsubstrat gemäß einem dritten Ausführungsbeispiel;
Figur 9- ein erfindungsgemäßes polymeres Wertdokumentsubstrat gemäß einem vierten Ausführungsbeispiel;
Figur 10- eine Banknote mit erfindungsgemäßen Sicherheitselementen.
- FIG. 1
- a polymeric value document substrate of the invention;
- Figures 2-4
- the production of a novel polymeric value document substrate according to a first embodiment;
- FIG. 5
- a polymeric value document substrate according to the invention according to a second embodiment;
- Figures 6-7
- the see-through window portion of the polymeric value document substrate when illuminated with polarized light, wherein depending on the rotation of the polarization direction of the polarized light, a different appearance can be seen;
- FIG. 8
- a polymeric value document substrate according to the invention according to a third embodiment;
- FIG. 9
- a polymeric value document substrate according to the invention according to a fourth embodiment;
- FIG. 10
- a banknote with security elements according to the invention.
Gemäß der
Gemäß der
Gemäß der
Sowohl der Sicherheitspatch 11 als auch der Sicherheitsstreifen 12 können jeweils einen analogen Aufbau aufweisen, wie er in einer der
Claims (21)
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DE102017003795.7A DE102017003795A1 (en) | 2017-04-19 | 2017-04-19 | Polymeric value document substrate, security element, value document and manufacturing method |
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EP3392054A1 true EP3392054A1 (en) | 2018-10-24 |
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