EP1633929A1 - Papier de surete - Google Patents

Papier de surete

Info

Publication number
EP1633929A1
EP1633929A1 EP04735021A EP04735021A EP1633929A1 EP 1633929 A1 EP1633929 A1 EP 1633929A1 EP 04735021 A EP04735021 A EP 04735021A EP 04735021 A EP04735021 A EP 04735021A EP 1633929 A1 EP1633929 A1 EP 1633929A1
Authority
EP
European Patent Office
Prior art keywords
fibers
security paper
mottled
paper according
mottled fibers
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.)
Withdrawn
Application number
EP04735021A
Other languages
German (de)
English (en)
Inventor
Thomas Bodendieck
Thomas Mang
Peter Hoffmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Giesecke and Devrient GmbH
Original Assignee
Giesecke and Devrient GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Giesecke and Devrient GmbH filed Critical Giesecke and Devrient GmbH
Publication of EP1633929A1 publication Critical patent/EP1633929A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H15/00—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution
    • D21H15/02—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution characterised by configuration
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H15/00—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution
    • D21H15/02—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution characterised by configuration
    • D21H15/10—Composite fibres
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/40—Agents facilitating proof of genuineness or preventing fraudulent alteration, e.g. for security paper
    • D21H21/44—Latent security elements, i.e. detectable or becoming apparent only by use of special verification or tampering devices or methods
    • D21H21/48—Elements suited for physical verification, e.g. by irradiation
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/50—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by form
    • D21H21/52—Additives of definite length or shape

Definitions

  • the invention relates to a security paper for the production of documents of value, such as banknotes, passports, identification documents or the like, with at least one type of mottled fibers, the mottled fibers being in a geometric shape which has an increased specific surface area compared to a cylindrical shape.
  • the invention further relates to a document of value with such security paper and the use of mottled fibers for the production of security paper.
  • Security paper is understood below to mean paper that is used to produce value documents and e.g. can already be equipped with security features such as watermark, security thread, hologram patch, etc.
  • the value document is understood to mean the end product.
  • Security and security prints such as banknotes, shares, bonds, certificates and vouchers, checks, high-quality admission tickets, but also other documents that are subject to counterfeiting, such as passports or other identification documents, are equipped with various security features to increase their security against counterfeiting.
  • Melange fibers have also been used as a security feature in this context for a long time.
  • the mottled fibers used in documents of value usually consist of short plastic, cellulose or cotton fibers, which are introduced into the security papers during paper production.
  • the mottled fibers have the advantage over other security features, such as planchettes or mica flakes, that they are smaller and less visually conspicuous. From the- for this reason they exert a less disturbing influence on the overall aesthetic impression of the security document.
  • the mottled fibers are equipped with feature substances.
  • feature substances are e.g. B. luminescent, magnetic or electrically conductive substances.
  • DE 677711 discloses mottling fibers which fluoresce under UV light and which are mixed into the paper pulp before the sheet is formed.
  • the use of different fluorescent mottled fibers is suggested, which generate mixed fluorescence under UV lighting.
  • DE 31 22470 discloses a security paper with luminescent mottled fibers incorporated therein.
  • the mottled fibers consist of cellulose acetate and are colored withucirinescent substances from the group of lanthanide chelates.
  • the invention is therefore based on the object of providing a security paper with mottled fibers which avoids the disadvantages of the prior art.
  • the adhesion of the mottled fibers in the substrate is to be improved.
  • the invention is based on the finding that the adhesion of the mottled fibers in the substrate can be improved by increasing the surface of the mottled fibers.
  • a trivial way to enlarge the surface of the mottled fibers is to enlarge the individual fibers, i.e. the use of thicker or longer fibers.
  • the mottled fibers should appear as little as possible when the security document is viewed visually. This requirement alone makes it impossible to use larger fibers.
  • a larger fiber diameter increases the stiffness of the Eirizelmaschine, so that when the paper is mechanically stressed, e.g. during processing, the fiber does not follow the movement of the fiber composite and breaks out of the structure faster than a slim fiber. This makes it easier for counterfeiters to isolate a fiber with a larger diameter.
  • the surface of the mottled fibers can also be enlarged by increasing the specific surface.
  • the specific surface area of a solid is defined in the scientific literature as the surface area per mass of the solid [m 2 / kg].
  • the specific surface area of a fiber is understood to mean the surface area of the fiber per fiber volume [m 2 / m 3 ]. This is to be seen against the background that the basic concept of the invention is not the exchange of substances. It is not the water A can be exchanged for mottled fiber B, which may have a larger surface. Rather, the geometric shape of the mottled fibers used should be changed.
  • the security paper according to the invention is characterized in that the mottled fibers used have a geometric shape that has a larger surface than cylindrical mottled fibers in terms of material. If one assumes that material-identical fibers have the same density, then the specific surface area of a fiber can be compared as the surface area of the fiber per fiber volume.
  • mottled fibers known from the prior art which are used as a security feature in security papers, have one property in common: they have a circular cross-section of fiber with a constant diameter, which means that such fibers are cylinders.
  • the mottled fibers are used in security papers that have the lowest specific surface area that is conceivable for fibrous structures.
  • the specific surface of the mottled fibers is compared to the specific surface Area of mottled fibers in cylindrical form increased by at least 10%, preferably by at least 20%.
  • any increase in the specific surface area of the mottled fibers contributes to their improved adhesion to the substrate fibers, with an increasing degree of adhesion being found as the surface area increases.
  • the mottled fibers have a specific surface which is increased by at least 50%, very particularly preferably by at least 100%, compared to mottled fibers in cylindrical form. The aim is to determine the optimal specific surface in which the mechanical fixation is optimal.
  • any cross-section of the mottled fibers that comes into consideration is any profile that deviates from the standard profile of the fibers with a circular cross-section that is currently used. It has proven to be particularly advantageous if the mottled fibers have a concave cross section, at least in some areas.
  • the presence of concave sections in the cross-section of the fibers is equivalent to a deviation from a circular cross-section and thus fulfills the condition in any case that the mottled fibers are in a geometric shape which has a higher specific surface area than a cylindrical shape.
  • mottled fibers with an increased specific surface a lower, in some cases even no, mottled fiber separation from the substrate surface in subsequent processing operations, such as e.g. B. offset printing.
  • subsequent processing operations such as e.g. B. offset printing.
  • errors in the print image which are otherwise caused by loose mottled fibers on the printing blanket of the printing press.
  • the cross-section of the mottled fibers within the scope of the present invention is any profile that deviates from the standard profile of the fibers with a circular cross-section currently used.
  • These include elliptical, rectangular, star-shaped, V-shaped, trilobal and octalobal cross sections as well as fibers with various hollow profiles.
  • the trilobal forms are preferred among this very large variety of fiber cross-sections.
  • the "trilobal” is the cross-section of a fiber similar to cloverleaf.
  • These trilobal fibers can be produced in any variety of shapes, preferably in two variants, namely with thin or thick legs.
  • Y-shaped fiber cross sections are particularly preferred, the legs of the Y being different
  • two legs can have the same length, while the third leg has a greater length, and very good results are also achieved with star-shaped cross sections, and star shapes with four (cruciform), five or six are particularly preferred
  • ribbon-shaped fibers and flat fibers ie fibers with a rectangular cross-section, or alternatively fibers with a hexagonal cross-section are preferred.
  • Polyamide, polyester, polypropylene, viscose or cellulose fibers are particularly suitable for the production of mottled fibers with the cross-sections described above. These are therefore preferably used in the context of the present invention.
  • Materials which are particularly suitable for the formation of hydrogen bridge bonds are particularly preferred.
  • H-bridges can be used to anchor the mottled fibers better in the fiber composite. Examples of such materials are e.g. cellulosic chemical fibers (regenerated fibers), such as viscose fibers, but also natural fibers.
  • the hidden coding of information plays a particularly important role in security papers and the value documents made from them.
  • a specific coding feature of the value document can represent any information.
  • Mottled fibers of the type described above can also be used for coding information. Therefore, according to preferred embodiments, mottled fibers are used which contain luminescent substances with characteristic luminescent properties, magnetic substances or electrically conductive substances. Of course, different types of these feature substances can also be present in the mottled fibers at the same time.
  • the feature substances are either present in the volume of the mottled fibers or the mottled fibers can alternatively be coated with the feature substances.
  • the use of bicomponent fibers is also possible. Such bicomponent fibers are made up of a core and a sheath, which generally consist of different materials.
  • Core / sheath bicomponent fibers are, for example, PP / PE, PET / Co-PET, PET / PE, PA6 / C0PA. Special advantages arise in connection with mottled fibers in security documents if the fibers are provided with a low-melting sheath, which melts due to the high temperatures in the dryer section of the paper machine.
  • the melting range of the jacket is preferably in the temperature range from 95 to 150 ° C.
  • the fiber material is, for example, PA6-coated PA6 with a melting range of the jacket of 110 to 120 ° C.
  • Bicomponent and monofilament fibers for example made of polyester (PET), polypropylene (PP), polyvinyl alcohols (PVAL) and polyethene (PE), are also conceivable.
  • PET polyester
  • PP polypropylene
  • PVAL polyvinyl alcohols
  • PE polyethene
  • the melting point of the fiber material can be adjusted using the copolymers. Due to the melting coat, the mottled fiber is glued into the fiber composite.
  • the jacket of the bicomponent fibers can, however, also be constructed from a material which is particularly well suited for the formation of hydrogen bonds. In this way too, the mottled fibers can be anchored better in the fiber composite. Examples of such materials are cellulosic chemical fibers (regenerated fibers), such as viscose fibers.
  • the security papers described above can advantageously be used to produce value documents based on cellulose and / or tree wool that are used with special security features such.
  • B. watermarks are equipped. These documents of value are e.g. B. Checks, passport papers, security papers and other security papers. As a standard, these papers are provided with a starch surface sizing which does not offer an optimal condition for a firm surface fixing of mottled fibers.
  • the use according to the invention of mottled fibers with different types of cross-sections has a further advantage.
  • the cross-section of the mottled fibers is a unique feature of the respective fiber type and can therefore be used to encode information.
  • a further parameter is thus available which can be used for coding information.
  • the use of the cross-section of the mottled fibers as a coding feature has the advantage over the use of luminescent substances, magnetic substances or electrically conductive substances that the manufacture of the mottled fibers becomes simpler and therefore less expensive. This is because the step of equipping the mottled fibers with the respective feature substance becomes superfluous and can therefore be saved.
  • the mottled fibers with an individual cross-section are additionally equipped with one or more feature substances, this results in a large number of additional combinations of coding features, as a result of which a larger amount of information can be encoded.
  • the object of the present invention therefore offers advantages even in the case of value documents in which the adhesion of the mottled fibers in the substrate can be achieved without problems by gluing.
  • the surface sizing with polyvinyl alcohol (PVA) good adhesion conditions for mottled fibers.
  • PVA polyvinyl alcohol
  • the coding possibilities increase even without the use of feature substances if two or more types of mottled fibers are used in a security paper that have different cross-sections. Since each type of fiber, which is characterized by a specific cross-section, can be assigned a specific information content, a large number of coding variants result. The presence or absence of one or more types of mottled fibers in the security paper then encodes very specific information.
  • non-overlapping partial areas are defined on the security paper, in each of which a certain type of mottled fiber with a certain fiber cross section is arranged.
  • coding can be represented by a defined geometric arrangement of the partial areas and / or by the presence or absence of the mottled fibers.
  • the arrangement in limited sub-areas makes it easy to locate the mottled fibers with the different fiber cross-sections.
  • the detection of the mottled fibers can be carried out, for example, using optical methods (eg microscope).
  • the partial areas in which the mottled fibers are arranged preferably have the form of strips which extend over the entire width of the security document. They preferably have a width in the range from 5 mm to 30 mm.
  • the partial areas can also have any other shape, such as rectangular, round, oval, star-shaped, etc.
  • Wilcox process is a suitable process for introducing mottled fibers into endless, strip-shaped partial areas.
  • the mottled fibers are slurried in an aqueous suspension and during paper production through a tube with a special outlet nozzle onto the rotating screen near the Place where sheet formation on the sieve is just beginning.
  • the layer of the mottling fibers thus applied is immediately dewatered by a negative pressure generated within the sieve, as a result of which the attached paper fibers lie firmly on the sieve.
  • mottled fibers with different fiber cross sections are arranged in parallel in the paper machine.
  • the feeding devices of the mottled fibers are controlled in accordance with the coding to be applied. If the coding consists in the geometric arrangement of the partial areas provided with mottled fibers with different cross-sections, the feed devices are positioned accordingly on the paper machine at the start of paper production. The mottled fiber is then fed continuously.
  • the coding consists exclusively or additionally in the presence or absence of one or more types of mottled fibers, the supply must These mottled fibers can be stopped according to the coding. If the coding does not change within the production of a paper web, it is also sufficient here to place the required feeding devices accordingly at the start of production.
  • the completed security paper which in addition to the coding other security elements such. B. may have a security thread or the like, is then processed in a conventional manner, in particular printed and cut into individual security documents, such as banknotes, shares, checks or the like.
  • the invention thus also includes a document of value, such as a banknote, a share, a check, a passport, an identification document or the like, which has a security paper of the type described.
  • a document of value such as a banknote, a share, a check, a passport, an identification document or the like, which has a security paper of the type described.
  • the invention also encompasses the use of mottled fibers for the production of security paper, the mottled fibers being in a geometric shape which has an increased specific surface area compared to a cylindrical shape.
  • 1 shows a cross section through a mottled fiber according to the invention with a star-shaped cross section
  • 2 shows a cross section through a mottled fiber according to the invention with a cross-sectional hollow profile
  • FIG. 3 shows a cross section through a bicomponent mottled fiber according to the invention with a cross-shaped cross section
  • FIG. 4 shows a cross section through a mottled fiber according to the invention with a rectangular cross section
  • Fig. 5 shows a cross section through a mottled fiber according to the invention with a hexagonal cross section.
  • the mottling fibers 10, 20, 30, 40 and 50 shown in cross section in FIGS. 1 to 5 each have a larger specific surface area than fibers with a circular cross section.
  • the circular core 32 and the jacket 34 of a bicomponent mottled fiber 30 are shown by different hatching. It should be pointed out that the cross sections shown in FIGS. 1 to 5 are idealized representations. With real fibers there is always a certain rounding of the corners and edges.

Landscapes

  • Paper (AREA)
  • Credit Cards Or The Like (AREA)

Abstract

L'invention concerne un papier de sûreté servant à produire des documents de valeur, tels que des billets de banque, des passeports, des documents d'identité ou analogue. Ce papier de sûreté comprend au moins un type de fibres mélangées. Selon l'invention, ces fibres mélangées présentent une forme géométrique qui comporte une surface spécifique plus grande que celle d'une forme cylindrique.
EP04735021A 2003-05-28 2004-05-27 Papier de surete Withdrawn EP1633929A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2003124630 DE10324630A1 (de) 2003-05-28 2003-05-28 Sicherheitspapier
PCT/EP2004/005721 WO2004106631A1 (fr) 2003-05-28 2004-05-27 Papier de surete

Publications (1)

Publication Number Publication Date
EP1633929A1 true EP1633929A1 (fr) 2006-03-15

Family

ID=33482318

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04735021A Withdrawn EP1633929A1 (fr) 2003-05-28 2004-05-27 Papier de surete

Country Status (3)

Country Link
EP (1) EP1633929A1 (fr)
DE (1) DE10324630A1 (fr)
WO (1) WO2004106631A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009040747B3 (de) 2009-09-08 2011-07-21 Bundesdruckerei GmbH, 10969 Bilumineszente Melierfasern, eine diese aufweisende Folie, Dokument mit diesen sowie Verfahren zu ihrer Herstellung und ein Verfahren zur Herstellung eines Dokuments mit diesen
DE102009040746A1 (de) * 2009-09-08 2011-03-17 Bundesdruckerei Gmbh Kunststofffolie
DE102012220701A1 (de) 2012-11-13 2014-05-15 Bundesdruckerei Gmbh Sicherheitsmerkmal für ein Wert- und/oder Sicherheitsprodukt, das Wert- und/oder Sicherheitsprodukt und Verfahren zum Herstellen des Sicherheitsmerkmals
DE102012220703B4 (de) 2012-11-13 2017-11-02 Bundesdruckerei Gmbh Sicherheitsmerkmal für ein Wert- und/oder Sicherheitsprodukt, das Wert- und/oder Sicherheitsprodukt und Verfahren zum Herstellen des Sicherheitsmerkmals
US20150132575A1 (en) * 2013-11-14 2015-05-14 Honeywell International Inc. Luminescent fibers, articles including the same, and methods of forming the same
DE102014203080A1 (de) 2014-02-20 2015-08-20 Bundesdruckerei Gmbh Verfahren zur Herstellung einer Polymerschicht mit mindestens einem darin enthaltenen feinteiligen Feststoff, Polymerfolie und Verfahren zur Herstellung eines Folienkörpers
WO2016124124A1 (fr) * 2015-02-05 2016-08-11 上海柯斯造纸防伪技术有限公司 Fibre anti-contrefaçon, papier anti-contrefaçon la contenant et procédé de fabrication de fibre anti-contrefaçon et de papier anti-contrefaçon
JP6687932B2 (ja) * 2017-02-24 2020-04-28 独立行政法人 国立印刷局 真偽判別媒体

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US6035914A (en) * 1993-10-22 2000-03-14 Martin Marietta Energy Systems Inc. Counterfeit-resistant materials and a method and apparatus for authenticating materials
DE19541817A1 (de) * 1994-11-10 1996-05-15 Giesecke & Devrient Gmbh Verfahren zur Herstellung von Textilfasern oder -endlosfäden und deren Verwendung
US5932309A (en) * 1995-09-28 1999-08-03 Alliedsignal Inc. Colored articles and compositions and methods for their fabrication
US6217794B1 (en) * 1998-06-01 2001-04-17 Isotag Technology, Inc. Fiber coating composition having an invisible marker and process for making same
EP1092057A1 (fr) * 1998-06-01 2001-04-18 Isotag Technology, Inc. Fibres contenant des compositions de marquage et polymeres reticules
DE19912946A1 (de) * 1999-03-23 2000-09-28 Peter Medilek Verfahren zur Erzeugung von Fluoreszenz auf dunklen Fäden ohne Farbtonänderung mit hoher Permanenz
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DE10134977A1 (de) * 2001-07-24 2003-02-06 Giesecke & Devrient Gmbh Lumineszenzstoffe, ihre Herstellung und Verwendung
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Also Published As

Publication number Publication date
DE10324630A1 (de) 2004-12-23
WO2004106631A1 (fr) 2004-12-09

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