Classifications

• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
  • D06M13/50—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with organometallic compounds; with organic compounds containing boron, silicon, selenium or tellurium atoms
• • 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
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
  • D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
  • D06P1/0004—General aspects of dyeing
  • D06P1/0012—Effecting dyeing to obtain luminescent or phosphorescent dyeings
• • 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
  • D21H21/46—Elements suited for chemical verification or impeding chemical tampering, e.g. by use of eradicators
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S283/00—Printed matter
  • Y10S283/903—Lottery ticket

Definitions

• the present invention relates to security fibers, security threads, textile materials, plastic films and regenerated cellulose, plastic resins, luminescent, their production methods and their applications in fiduciary documents and other materials.
• Security fibers are fibers that are incorporated into fiduciary documents or other matters for the purpose of ensuring identification, authentication, protection against counterfeiting, imitation or falsification.
• the security threads are continuous threads or strips of film, introduced in the fiduciary documents for the same purpose as the safety fibers.
• other materials designates here materials which, in order to fight against their counterfeiting, imitation or falsification require a means of identification, authentication and protection obtained by the incorporation of security fibers in or on these materials.
• the present invention relates to the production of fibers preferably from the last group which are therefore invisible in sunlight or artificial light and which, under excitation of IR, UV or X rays, exhibit luminescence in one or more parts of the visible IR spectrum .
• UV, or X IR, or X.
• the dyes used in the context of this invention are Rare Earth compounds, or Lanthanides, with atomic number 57 to 71 to which are usually attached Yttrium and Thorium with atomic number 39 and 90 r Rare Earth compounds which have these luminescence characteristics and used in this invention are chelates.
• the present invention therefore proposes to resolve these difficulties by describing a process for producing safety fibers in which the incorporation of lanthanide, Yttrium and Thorium chelates is done not in the spinning mass of continuous threads, but by a process for dyeing fibers already extruded and cut into fibers.
• this invention has the advantage of having a certain similarity with the dyeing processes used by fiber dyers and therefore of using almost standard apparatuses in this industry, and of offering the possibility of carrying out manufacturing cycles compatible with the low quantities of safety fibers used by the industries which use them.
• This dyeing process which allows dyeing fibers with rare earth chelates is carried out in two different ways.
• the method basically consists in using as a dyeing medium a bath containing a combination of one or more solvents in which the rare earth chelates used are soluble, and one or more diluents in which the chelates Rare Earths are insoluble or poorly soluble, and to be taken from the dye bath, all or part of the solvent in liquid or vapor phase.
• This dyeing process already known in the prior art, has been used to dye with acid dyes and metalliferous acids, and those skilled in the art can find all the details in the literature, and in particular in french patents 2,054,430, 2,061,574, 2,088,081, 2,124,193.
• Example 1 Numerous exemplary embodiments of dyeing safety fibers with luminescent rare earth chelates according to this first embodiment of the invention were produced by replacing, in examples 1 to 7 of French patent 2,054,430 and 1 to 9 of French patent 2,124,193 textile materials used by fibers, dyes used by luminescent chelates from Rare Earths; the proportions of chelates used to replace the dyes are of the same order of magnitude and are fixed as a function of the intensity of the fluorescent emission desired in the safety fibers.
• the applicant has also found that a good dyeing of safety fibers is obtained by using a dyeing bath comprising only a solvent in which the chelates are soluble.
• this process basically consists in forming and synthesizing Rare Earth chelate in the dye bath which contains the fibers to be dyed, and therefore in fibers to be dyed.
• Example 2 1 kg of Fibranne fibers of 27 Dtex and 5 mm in length is introduced into a bath at 85 ° C formed of a aqueous solution / 20 Liters of 4.4.4.Trifloro.1.Phenyl.1.3.Butane- Sodium for 30 minutes; an aqueous solution of Terbium chloride which then causes the synthesis of the corresponding chelate and its precipitation in the fibers is then added with stoichiometric amount.
• the fibers removed from the dye bath and dried still have their original whitish appearance, but are fluorescent in green under UV rays due to the presence of the chelate precipitated in the fibers.
• aqueous bath of this example can be replaced by a water-solvent or pure solvent bath and useful reference to the literature on the manufacture of rare earth chelates.
• the respective amounts of chelating agents and rare earth salts are fixed according to the nature of the chelate to be synthesized and the luminescence intensity sought in the fibers.
• the working conditions of the dyeing bath are those usually used in the dyeing of textile fibers, in particular with regard to the temperature and the pressure which are selected according to the nature of the fibers to be dyed.
• the fibers which can be used according to the first or second embodiment of this invention can be natural, artificial or synthetic, and without departing from the scope of this invention, textile materials can be dyed according to one or the other of these two modes. of the same nature as fibers, as well as continuous threads, films, natural artificial or synthetic resins.
• This dyeing process can also be applied to fibers of the first and second group, that is to say already colored fibers (their color, for example yellow, being visible in sunlight or artificial dye) which will present after their / according to this invention a very interesting feature of additional luminescent emission (in this example the yellow fibers will also have a green fluorescene under UV if they have been dyed with a Terbium chelate according to one of the two methods described).
• the fibers produced according to Examples 1 and 2 of this invention were added in small quantities to the paper pulp; a paper machine transformed this paper pulp into paper and an excellent security paper was thus produced comprising authentication marks which are invisible except under certain lighting conditions (U.V., I.R., or X).
• the originator has also found that the luminescence of these rare earth chelates is sensitive to pH, being maximum at neutral pH and gradually declining as soon as the environment of the chelate moves away from this neutral pH.
• the applicant has thus constituted either a new means of authentication, or a secret code, or a marking, for example, of the date of manufacture.
• This new means of authentication was produced by incorporating security fibers dyed according to the invention in a security paper manufactured at ? It is acidic, and therefore the luminescence of the fibers quickly disappears.
• this paper was immersed in an alcoholic solution of the chelating agent which had been used to synthesize the chelate used to dye the fibers, and we were able to authenticate this paper by the reappearance of the luminescence of the safety fibers.
• the decline in luminescence of the dyed fibers according to this invention being proportional to the residence time of the fibers in their acid or basic support, this decline can be used to constitute a time scale elapsed in relation to a support of neutral character possibly serving as a reference.
• a security paper produced at acidic pH and containing fibers of the invention a security label was produced which has been stuck on products and whose luminescence decline indicates for example the expiration date, the end warranty, or other deadlines.
• This marking which constitutes a secret code and a time coding, is applicable in particular to transport tickets with limited validity and in general to the production of documents or other materials having value only for a limited period.

Landscapes

• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Accounting & Taxation (AREA)
• Organic Chemistry (AREA)
• Inorganic Chemistry (AREA)
• Business, Economics & Management (AREA)
• Chemical & Material Sciences (AREA)
• Finance (AREA)
• Paper (AREA)
• Coloring (AREA)
• Multicomponent Fibers (AREA)
• Luminescent Compositions (AREA)
• Inks, Pencil-Leads, Or Crayons (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (3)

Family

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Family Applications (1)

Country Status (5)

Cited By (10)

Families Citing this family (61)

Citations (2)

Family Cites Families (8)

• 1984
  • 1984-06-22 FR FR8409807A patent/FR2566440B1/fr not_active Expired
• 1985
  • 1985-06-11 AT AT85401148T patent/ATE37053T1/de not_active IP Right Cessation
  • 1985-06-11 EP EP85401148A patent/EP0169750B2/de not_active Expired - Lifetime
  • 1985-06-11 DE DE8585401148T patent/DE3564832D1/de not_active Expired
  • 1985-06-20 US US06/746,671 patent/US4655788A/en not_active Expired - Lifetime
• 1989
  • 1989-06-13 US US07/366,293 patent/US4921280A/en not_active Expired - Lifetime

Patent Citations (2)

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