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
  • B42D25/40—Manufacture
  • B42D25/405—Marking
  • B42D25/41—Marking using electromagnetic radiation
• • G—PHYSICS
  • G07—CHECKING-DEVICES
  • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
  • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
  • G07D7/06—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using wave or particle radiation
  • G07D7/12—Visible light, infrared or ultraviolet radiation
  • G07D7/1205—Testing spectral properties
• • 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
  • B42D25/21—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose for multiple purposes
• • 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
  • B42D25/23—Identity 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
  • B42D25/20—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
  • B42D25/285—Gift 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
  • B42D25/20—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
  • B42D25/40—Manufacture
  • B42D25/45—Associating two or more layers
• • G—PHYSICS
  • G07—CHECKING-DEVICES
  • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
  • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
  • G07D7/20—Testing patterns thereon
  • G07D7/202—Testing patterns thereon using pattern matching
• • B42D2033/30—
• • 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

Definitions

• the present invention relates to a method for detecting a value and / or security document, which comprises at least one document layer.
• Identification documents such as a passport or identity card, which generally consist, at least in part, of a multilayer plastic laminate. Such documents are known, for example, from DE 10 2008 008 044 A1. Thereafter, card-shaped data carriers, in particular security and / or value documents, for example by lamination of several individual layers
• Single layers may be, for example, polycarbonate (PC), polyurethane-based thermoplastic (TPU), ABS, polyethylene terephthalate (PET), polyethylene, a composite of PC and TPU or paper, paperboard or fabric or a composite of individual ones of these materials.
• the core of the cards may for example consist of a light-absorbing material, while the Au EDlagen consist of a transparent material.
• security and / or security documents are, for example, the driver's license, a check or credit card, a company card, authorization card or
• Membership card which is generally provided in the form of a card in ID-1 format, also laminated and made of plastic. Also, banknotes, checks, gift and shopping vouchers can at least partly
• Plastics exist.
• the documents mentioned each consist of at least one document layer and usually more than one document layer. At least some of the document layers of said ID-1 cards are made wholly or at least partly of plastics.
• Dihydroxydiphenylcycloalkane for example based on 4,4 '- (3,3,5-trimethylcyclohexane-1,1-diyl) diphenol, 4,4' - (3,3-dimethylcyclohexane-1,1-diyl) diphenol or 4, 4 '- (2,4,4-trimethylcyclopentane-1,1-diyl) diphenol.
• Security features are, for example, in DE 10 2007 015 934 A1 guilloches, microchip, metameric systems, imprints with fluorescence, phosphorescence and / or upconversion colors, barcodes, optically variable colors, holograms and kinegrams, digital watermarks, register prints, see-through windows, Meliermaschinen, security threads and micro perforations called.
• imprints with infrared color are given as a security feature. For example, it is in the
• Security feature in this document in one embodiment to a non-solid print in a color that absorbs infrared light, but transmits visible light.
• DE 10 2005 032 704 A1 specifies a sheet-shaped value document which has a machine-readable code, which is formed in particular in the form of a barcode.
• the barcode can be detectable, for example, in the infrared spectral range.
• the barcodes can be made of IR-absorbing and luminescent
• An infrared-absorbing tracer may be substantially colorless in the visible spectral region.
• the present invention has for its object to provide a method for detecting a value and / or security document that is particularly suitable to verify the authenticity of the document.
• the security feature should not be immediately recognizable, so that its presence is usually not expected.
• the verification should be possible with simple means.
• the object is achieved by the method for detecting, in particular verifying the authenticity, of a value and / or security document comprising at least one document layer containing a first polymer.
• a second polymer other than the first polymer is present in or on at least one document layer.
• the method comprises the following method step: detecting the document by detecting the presence at least the second polymer by spectral analysis in the infrared range. This does not exclude that for practical reasons, for example, to increase the security of the verification, in addition, the presence of the first polymer by spectral analysis in the infrared range is detected.
• the second polymer of the first polymer may inter alia also differ by a polymer component additionally contained in the second polymer, which is not contained in the first polymer. If the two polymers are otherwise identical, the difference is caused solely by this further blended polymer component.
• the first and second polymers and optionally any further polymer are visually indistinguishable from each other, i. possible additives, such as
• the infrared range used for the spectral analysis (wavelength: 800 nm to 1 mm) is in particular the middle infrared range in which vibration modes of the polymers can be detected, ie, modes in the range of, for example, 4000 cm -1
• vibration modes are primarily vibration modes which detect individual bonds (localized vibrations) as well as scaffold vibration modes.
• harmonics and combination oscillations In principle, other infrared ranges can also be used, provided that differences in the spectral characteristics of the two polymers (luminescence, absorption) are evident in these other regions.
• the presence of the second polymer is detected by detecting the presence of an IR band characteristic of the second polymer, in particular IR absorption band.
• Document actually contains these two polymers.
• the first polymer it is not necessary for the first polymer also to be detected spectrally, for example because the presence of the usually used first polymer in the document is normally expected anyway.
• the detection of the IR properties of the additionally introduced second polymer is therefore fundamentally first according to the invention.
• Visually and without additional aids it is not evident whether a document contains the second polymer in addition to the first polymer. Therefore, the authenticity of such a complex composed document can not be verified without these aids and only visually.
• the presence of the second polymer in addition to the first polymer in the document is not apparent, so that a construction of a document with two
• security feature is thus a so-called “second level” - or even “third level” security feature that on the one hand already in one
• Comparable document usually existing materials (first polymer) and on the other hand from materials that are only slightly changed compared to the existing materials in the document (second polymer) exists.
• Security feature is therefore neither visible nor forfeitable, but can be detected with a suitable device.
• This technique is inexpensive, providing a cost-effective solution for verifying the document.
• a value and / or security document according to the invention which is at least one of a first polymer document layer containing, in or on at least one
• Document position of the document is a different from the first polymer second polymer and the two polymers have different IR absorption spectra, in particular different vibration spectra.
• suitable detection devices can be used for this purpose. These are also within the meaning of the present application according to the invention. They are capable of differentiating the two polymers in the document by means of infrared spectral analysis.
• the detection device may for example be constructed on the basis of a Fourier transform infrared spectrometer (FTIR) or on the basis of a Raman spectrometer and be arranged to be in transmission or reflection, for example ATR
• FTIR Fourier transform infrared spectrometer
• Raman spectrometer Raman spectrometer
• such a device comprises in particular an infrared radiation source which is capable of emitting the infrared radiation required for the detection.
• this radiation source can emit infrared radiation in the mid-infrared spectral range.
• a radiation source for example, a globar can be used. Basically, the emission spectrum of the
• the detection device comprises an infrared sensor, for example a photodiode, a thermal or pyroelectric detector.
• Radiation source and a high-resolution monochromator as a dispersive element and a photomultiplier used for detection. Also in this case, the optical arrangement must have a holder for the document to be examined.
• the FTIR measuring device is preferably used when the document layer to be examined, in or on which the second polymer is located, is within one Range of a few ⁇ , for example, up to 10 ⁇ , located below the surface of the document, since the IR radiation used for the investigation can not escape from a greater depth and the detection is therefore limited to the surface area.
• the second polymer is in or on one
• the Raman measuring arrangement which works with visible light, so that the
• Excitation radiation and the radiation also scattered in the visible spectral range can pass through one or more other document layers. Thereby, the information about the presence of the second polymer can also be obtained from inside the document.
• the measuring arrangement can be in
• Information encoded in this pattern can be detected.
• an imaging optics may be provided, or the pattern is detected by means of a scanning technique, such as the laser beam of the required for the Raman spectrometer laser light source, for example, line by line over the surface containing the pattern and thereby sequentially obtained signal sequence are converted into an image.
• Credentials membership cards, gift certificates, shopping vouchers and tokens. It is particularly preferred if the value and / or
• Security document conforms to the ID-1 or ID-2 format in accordance with ISO 7810 or the data page of a document in ID-3 format in accordance with ISO 7810.
• the security and / or security documents according to the invention are usually produced by lamination of films.
• the slides can be the same or
• PC polycarbonate
• PET polyethylene terephthalate
• PTC polyethylene terephthalate
• PTG glycol modified PET
• PEN polyethylene naphthalate
• PVC polyvinyl chloride
• Polyvinyl butyral PVB
• polymethyl methacrylate PMMA
• polyimide PI
• polyvinyl alcohol PVA
• polystyrene PS
• polyvinylphenol PVP
• polypropylene PP
• PE polyethylene
• TPE thermoplastic elastomers
• TPU thermoplastic polyurethane
• ABS acrylonitrile-butadiene-styrene
• Hybrid materials containing, among others, the above-mentioned materials.
• security and / or security documents which at least partially consist of PC and / or PET and / or PE and / or polymers similar thereto.
• the films are laminated under pressure and heat.
• Documents from PC are typically produced at 180 ° C to 210 ° C and at a pressure of more than 5 bar (maximum 20 bar) within 1 s to 1 h. Short cycle times are common for single card lamination, long cycle times for batch lamination of multiple uses.
• the presence of the first polymer is also detected by spectral analysis in the infrared range.
• the first polymer and the second polymer each contain a first monomer and a second monomer. The respective first monomers of the first and second polymers are in this
• first and second polymers of which at least one, for example the second polymer, consists of three, four, five or even more monomers and wherein only one of the monomers, namely the first monomer, in both polymers is identical.
• the second monomer in the second polymer may be identical to the second monomer in the first polymer.
• the first polymer may also consist of more than two monomers, namely three, four, five or even more monomers.
• there are several alternative possibilities namely only the respective first monomer in both polymers is identical, and the respective second, third and further monomers are different, or the first and the respectively second monomer in both polymers are identical, and each third and further monomers
• first polymer / second term second polymer, ⁇ , ⁇ ', ⁇ , ⁇ ', C, C: first, second, third
• n 1 , n 2 are integers), wherein at least one of the n 1 monomers of the first polymer with one of the n 2 monomers of the second polymer is identical (identity pairs) and the others are different. Furthermore, it is to be demanded that if several pairs of identical monomers occur between the two polymers, at least one monomer of the two polymers forms no identity pair and these two polymers are thus different.
• first and second polymers it is also possible to include in the document further polymers which in turn differ from one of the two polymers only in one or a few of the monomers, or which are completely different from the first and the second polymer.
• Presence of the second polymer is possible, which is done by means of spectral IR analysis.
• the first polymer and the second polymer are each polyester.
• the first monomer is selected from the group comprising terephthalic acid, isophthalic acid, phthalic acid, their derivatives and phosgene.
• Terephthalic acid, isophthalic acid, phthalic acid or their derivatives are used together with a diol for the preparation of
• Terephthalic acid as the first monomer are particularly preferred.
• Phosgene as the first monomer is used together with a diol to make polycarbonates.
• the second monomers may be mainly diols. Particular preference is given to diols which are selected from the group comprising 4,4'-dihydroxy-2,2-diphenylpropane, geminally disubstituted dihydroxydiphenylcycloalkanes, derivatives thereof, ethylene diol and 1,4-bis (hydroxyalkyl) cyclohexane, in particular 1, 4-bis (hydroxy (C 1 -C 4 -alkyl)) cyclohexane and most preferably 1, 4-bis (hydroxymethyl) cyclohexane.
• the first polymer may be, for example, polyethylene terephthalate (PET).
• PET polyethylene terephthalate
• terephthalic acid or a derivative thereof is used as a first monomer and ethylene diol (HO-CH 2 CH 2 -OH) as a second monomer.
• 1,4-bis (hydroxymethyl) cyclohexane is used instead of ethylene diol as the second monomer.
• the resulting second polymer is then PETG.
• the second polymer may also be a copolymer
• the first polymer may be polycarbonate (PC).
• PC polycarbonate
• phosgene is used as the first monomer and bisphenol A (4,4'-dihydroxy-2,2-diphenyl-propane) as the second monomer.
• bisphenol A 4,4'-dihydroxy-2,2-diphenyl-propane
• Dihydroxydiarylcycloalkane especially dihydroxydiphenylcycloalkane, used as second monomer.
• Alternative compounds of this type which can be used as the second monomer instead of bisphenol A are described, for example, in DE 10 2007 052 947 A1.
• Polycarbonates may further contain other diphenols, for example
• the polycarbonate described includes inter alia also the polymer APEC® marketed by Fa. Bayer, DE. Also, this material is expressly incorporated as the second polymer in the disclosure of the present application.
• the second polymer can also be formed with the additional use of bisphenol A, so that, depending on the proportion of bisphenol A in this polymer, IR properties of the second polymer which are more or less similar to those of the first polymer are obtained.
• the first polymer and the second polymer differ in terms of
• Structural properties of the first and the second polymer are different.
• this concept can also be combined with the aforementioned concept that partially different monomers are used to prepare the first and second polymers.
• the first polymer and the second polymer are each polyethylene.
• the first polymer may be PELD (with highly branched polymer chains) and the second polymer may be PEHD (with lightly branched polymer chains).
• composition Furthermore, polymer combinations can be used in which the first and the second polymer are copolymers and the first polymer
• a block copolymer and the second polymer are a random copolymer. It is of course essential that in each case differences in the spectral properties, in particular spectral absorption properties, of the respective first and second (and optionally third, fourth and further) polymers in the infrared range show that can be evaluated, whereby not exclusively the middle infrared range must be used, but possibly other areas, provided that they give a suitable difference in the IR properties.
• Another way to provide at least two polymers that are different from one another in the document is to provide at least one document layer of a first polymer and at least one second polymer in or on the first Document layer by / ns / fu-modify the first polymer to produce.
• the second polymer is formed in this case from the first polymer.
• the first polymer either over the entire surface or only locally limited in or on the first
• Document layer by energy input in the presence of additional chemical agents (such as oxygen) or even without such additional agents in a chemically altered species, the second polymer converted.
• additional chemical agents such as oxygen
• the energy can be registered in the material of the first polymer by means of a laser over the entire area or over a limited area.
• halogenation via gaseous phase halogenating agent (e.g., bromine or iodine) in contact with the first polymer. and under irradiation with UV light.
• suitable chemical agents such as halogenation via gaseous phase halogenating agent (e.g., bromine or iodine) in contact with the first polymer. and under irradiation with UV light.
• suitable chemical agents such as halogenation via gaseous phase halogenating agent (e.g., bromine or iodine) in contact with the first polymer. and under irradiation with UV light.
• suitable chemical agents such as halogenation via gaseous phase halogenating agent (e.g., bromine or iodine) in contact with the first polymer. and under irradiation with UV light.
• gaseous phase halogenating agent e.g., bromine or iodine
• the security and / or security document comprises at least a first document layer and a second document layer, wherein the first document layer at least partially consists of the first polymer and the second document layer at least partially of the second polymer.
• the first document layer can essentially consist of the first polymer and the second document layer essentially consist of the second polymer.
• the first polymer may form a first document layer of the document and the second polymer may form a second document layer of the document.
• the two document layers of the document consist almost completely of the respective polymers.
• the document may have an upper outer first
• Document layer of the second polymer include.
• the method according to the invention may comprise the following method steps: i) optionally detecting the presence of the first polymer of the first document layer and ii) detecting the presence of the second polymer of the second document layer, wherein the first document layer is preferably the upper outer document layer and the second document layer is preferably the second document layer lower outer document layer.
• the first polymer may form a first document layer of the document and the second polymer may form a pattern printed or otherwise applied to the first document layer, or to any other document-accessible document layer of the document.
• the second polymer in the last-mentioned variant can form a pattern made in the first document layer or the other document layer of the document, for example by filling in depressions. Such depressions can
• the document usually contains further document layers, for example outer overlay films, provided the first and second document layers are not on the outside, as well as
• the second polymer may also be used in the preparation of the paper for the second polymer.
• Banknotes for instance in the form of stripes, but also over the entire surface or in the form of other patterns, such as diamonds, wavy lines, guilloches, etc., are applied to the paper web, or the second polymer is applied to the banknote paper directly or as part of a printing ink after papermaking in the production of banknotes.
• a material essentially consisting of the second polymer is in the form of a pattern on or in at least one first document layer or the other document layer consisting essentially of the first polymer.
• the information encoded in the pattern may be a value of the document or a
• the pattern may be formed by any symbols.
• the pattern may be a
• the method according to the invention may comprise the following method steps: i) optionally detecting the presence of the first polymer of the first document layer and ii) detecting the presence of the second polymer of the sample. If the pattern is scanned, for example line by line, the code can be read and the information encoded therein can be captured.
• the first polymer may form a first document layer and the second polymer may form a localized area at a defined location of the document on or in the first document layer or on or in another document layer of the document limited area completely or only partially, for example in the form of a pattern can fill.
• this can also be realized in that an entire second document layer consists of the second polymer and can be detected from the outside only in a localized area via a window permeable to the IR detection. For the detection of the presence of the second
• polymers require the area of the document in which the second polymer is or is expected to be examined.
• the second polymer may optionally be present in a different range and therefore can not be detected by the method according to the invention.
• combinations of the variants indicated above can be realized, for example, a first document layer of a first polymer, a second document layer of a second polymer, a in the first
• Documents embedded pattern of the second polymer and / or embedded in the second document layer pattern of the first polymer wherein one of the two patterns or both may additionally be present only at localized locations of the respective document layer and thus more information about the location of the second Deliver polymers.
• a first absorption caused by the first polymer and a second absorption caused by the second polymer are determined.
• the first and the second absorption are then determined.
• the first absorption and the second absorption are preferably compared in a fourth method step iv).
• the respective attenuation of the radiation is determined in the form of the respective extinction values.
• step iii) an index is formed, which consists of the first absorption
• the absorption of the second polymer in the document can be detected.
• the presence of the second polymer in this case is indicated by an absorbance in a suitable wavelength range.
• the shift of an IR band can be detected to determine if the second polymer is present in the document.
• the figures given below serve to illustrate the invention. They merely illustrate embodiments. They show in detail:
• FIG. 1 shows a schematic representation of a detection device for the
• FIG. 2 shows a document having a first document layer of a first polymer which has a barcode printed from a second polymer
• Fig. 1 shows a detection device based on an FTIR measuring arrangement.
• the document is designated 1. It is held by a document holder 2.
• the document holder 2 has an opening at the bottom so that measuring radiation can reach the document 1 from below.
• a radiation source 4 emits IR radiation in the middle frequency range. This radiation is first passed through a beam splitter 5 via an optical arrangement (Michelson interferometer) and arrives at a stationary mirror 6. At the same time, radiation also reaches the beam splitter 5 on a movable mirror 7. The radiation of both radiation paths is then transmitted through a beam splitter 5 another mirror 8 passed to the document 1. The scattered radiation is detected in the detector 3 and in a downstream evaluation system (not shown).
• FIG. 2 shows an example of a document 10 having a first document layer 11 made of a first polymer (bisphenol A-based polycarbonate).
• This document layer is one of several document layers in the document. It is located at the surface of the document.
• an FTIR measuring arrangement is used.
• a barcode 12 is applied, which with a
• According to the invention detects the identity of the two polymers.
• FIG. 3 shows two IR spectra, the first polymer being designated PC1 and the second polymer PC2.
• the spectrum of PC1 is recorded at a location of the first document layer 10 where the barcode 1 2 is not printed, and the spectrum of PC2 at the location of the barcode 12.
• PC1 and PC2 are polycarbonate materials based on cyclohexane-modified bisphenol A.
• Its size is a measure of whether the second polymer is present or not.

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• 2010
  • 2010-10-05 DE DE102010041975A patent/DE102010041975A1/de not_active Withdrawn
• 2011
  • 2011-09-19 WO PCT/EP2011/066197 patent/WO2012045567A1/de active Application Filing
  • 2011-09-19 EP EP16163882.0A patent/EP3059713B1/de active Active
  • 2011-09-19 CN CN201180048240.3A patent/CN103250188B/zh active Active
  • 2011-09-19 AU AU2011313503A patent/AU2011313503B2/en active Active
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