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
  • 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
  • D21H21/42—Ribbons or strips

Definitions

• Security sheet comprising a fibrous substrate
• the invention relates to the field of security documents. It relates to a security sheet comprising a security tape and the method of manufacturing the security sheet. It also concerns the security tape itself.
• Security documents are produced from particularly fibrous materials and may include banknotes, identity cards, passports, driving licenses, visas, checks, vouchers, tickets or admission tickets to a cultural or sports event.
• the introduction in strip of said security elements can in particular be done by supply ducts placed along the width and opening into the shape tank nearby. from round form, before the beginning of draining of a fibrous suspension on a fabric of a round form. After draining, a security sheet is obtained which is then pressed and then dried according to the current papermaking process.
• the main drawback relating to said first method of obtaining a band containing security elements is the irregular dispersion of said security elements.
• bandwidth and spatial distribution (x, y, z) of the security elements can be particularly troublesome in the case of recognition and / or authentication and / or identification based on the spatial distribution (x, y , z) said security elements in said security document. Indeed, because of too great variability, the use of the position or the width of said band, or the spatial distribution of said security elements, for purposes of recognition and / or authentication and / or or identification, may in particular be impossible to implement.
• recognition applies when a document or element of a document is compared to a reference to determine the authenticity of that document document or element
• authentication means determining whether the document is authentic or whether it has been falsified or counterfeited
• identity is the verification of the identity of the owner of a given document.
• said type of problem mentioned above is encountered in the case of authentication of security elements automatically using a non-portable device based on the specific signal of one or more elements (s). ) of security.
• some of said security elements are covered with a layer of fibers and / or mineral charges too thick to allow the correct detection of their specific signals by said automatic authentication device.
• said introduced security threads generally have a width of less than 10 mm, a thickness of between 12 and 45 ⁇ m and are, in most cases, made up of ribbons of plastic materials, in particular based on polyester.
• Said security son are in particular secured by visible or non-visible patterns, in positive and / or negative, optically variable devices and in particular holograms, luminescence and in particular fluorescence, magnetism, electrical conduction or still thermochromic.
• Said security threads are incorporated inside the fibrous substrate constituting said security sheet is "en masse", that is to say completely covered with fibrous material, or “window”, said security thread being then located on the surface of said security sheet and en masse in the latter, for example in an alternating manner.
• the windows thus described may or may not be through, depending on whether said security thread appears respectively on two or on one side of said security sheet.
• the introduction of said security son en masse can in particular be carried out in a single jet, on a paper machine flat or round table.
• the wire is introduced into the shaped tank before or shortly after the beginning of the draining of the fibrous suspension on the fabric.
• the position of said security thread in the thickness of the final security sheet is determined in particular by the place and the insertion inclination of said security thread.
• the jet thus obtained can then be married in the wet state, that is to say before drying, with other jets whose fibrous compositions can be identical or different and which can be formed on paper machines at the table flat or round.
• Another way of introducing said security son en masse is to incorporate them between two successive jets produced on a flat table and / or a round shape, before the "marriage" of said successive jets by wet pressing.
• Said jets can themselves be married to other jets whose compositions may be identical or different and which can be formed on a flat table or a round shape, before or after the introduction of said security son.
• the two successive streams comprising said security son are eventually married to the other jets and then dried according to the current papermaking process to obtain a security sheet.
• the introduction of a window safety wire in a single jet is for example described in patent applications EP 059 056 for a paper machine with a round shape and EP 0 609 252 for a flat-bed paper machine.
• said security threads can in particular be coated with a adhesive, for example heat sealing products also called hot reactivatable products.
• a adhesive for example heat sealing products also called hot reactivatable products.
• the introduction of said security threads may in particular lead to a poor overlap of said security threads characterized, when they are introduced en masse, by a lack of material above said security threads and, when they are introduced in a window, by insufficient bridging.
• bridging is meant the fibrous covering of a security thread introduced in the windows in the zones between the windows, that is to say at the places where the thread is contained in the mass of said security sheet.
• the adhesives for example heat-sealing coatings, which can be added to said security threads develop their adhesive properties only after drying of said paper sheet containing said security threads, and the plastic materials constituting said security threads being hydrophobic
• said security son of the art prior art do not develop any bond with the fibrous substrate of said security sheet during dewatering and pressing which take place in wet part, that is to say before drying of the sheet. Consequently, the introduction of said security threads weakens said security sheet along the introduction strip, the adhesion properties of said security thread coated with an adhesive, for example a heat-sealing product, not being developed only during drying.
• said security threads are too wide, their impermeability impedes the drainage of the water contained in the fibers located above the son and thus prevents the consolidation of the fibrous mat, which causes in particular breakage of the sheet partially wet paper during the production of security sheets containing said security threads.
• the width of said security son exceeds about 1.5 cm, the fibrous mat is no longer strong enough and causes too many breaks of the paper sheet to allow a correct machinability of the paper machine.
• the materials of which said security threads are composed are generally plastic films which are optionally metallized and then possibly coated with varnish.
• Another disadvantage of said security threads is that they can be combined only with very fine particles and, in particular, by printing and / or metallization.
• the incorporation of flat security elements and relatively small size, such as boards, is impossible because of the materials of which said security son are constituted.
• the European patent application EP 0 557 157 of the Applicant describes the manufacture of a security sheet having monochrome or polychrome signs visible in transmitted light.
• the security sheet is manufactured from at least two fibrous jets and a strip having monochrome or polychrome marks introduced between the two fibrous jets.
• the strip thus introduced advantageously comprises cellulose fibers and a soluble and / or fusible binder product so that said product can be dispersed during the incorporation of the strip between the two jets so that the band disappears within sheet and that the printed marks are intimately linked to the sheet.
• the band thus obtained is completely destructured within the security sheet.
• the French patent application FR 2,679,934 of the Applicant describes a system for authenticating a security paper using a first chemical reagent present on the security paper, an authentication composition comprising a second chemical reagent forming a colored product with the first chemical reagent and an erasing composition of the colored product.
• the chemical reaction occurring during the authentication between the second reagent and the first chemical reagent only produces a coloration of the zone where the reaction occurs.
• International application WO 2006/095033 relates to a safety band comprising a ribbon of a cellulosic support formed of vegetable fibers.
• the cohesion and the integration of the ribbon in the substrate of the strip are ensured by the creation of chemical bonds between the vegetable fibers contained in the ribbon and in the substrate, in particular hydrogen bonds, but do not allow the ribbon to maintain its integrity. and its cohesion within the substrate of the strip, especially when the strip is placed in a wet environment, in case of an attempt to recover the strip by a counter factor, for example.
• the invention aims to further improve the security sheets.
• the invention relates for this purpose to a security sheet comprising a fibrous substrate in which is incorporated, at least partially, a ribbon extending between two edges of said fibrous substrate, said security tape being made of paper.
• the security tape comprises, in a preferred embodiment of the invention, at least one adhesive, for example at least one heat-sealing agent.
• the ribbon also comprises, in a preferred example of implementation of the invention, at least one security element.
• the ribbon extends between two opposite edges of said security sheet.
• substrate denotes a fibrous sheet that may especially comprise one or more fibrous layers.
• jets will be used to denote layers produced continuously on the same paper machine and then associated with the wet state.
• the invention can make it possible to provide a security sheet with security elements arranged in a band with a relatively homogeneous spatial distribution (x, y, z).
• the above adhesive makes it possible to optimize the adhesion of the security tape in the security sheet.
• the adhesive may for example be a heat-sealing coating, for example a heat-sealing varnish, an ultraviolet-crosslinkable agent (UV), an adhesive to irradiate, a pressure-sensitive adhesive (PSA), a varnish with a solvent base, of the polyester type for example, an adhesive in aqueous phase, etc.
• Mowilith DC aqueous dispersion of vinyl acetate homopolymer with particles of size ranging from 0.3 ⁇ m to 2 ⁇ m and glass transition temperature T g of 38 ° C, and dry content in solids between 55 and 57%) and Vinamul
• the adhesive may advantageously be an adhesive based on polyvinyl acetate such as Mowilith DC.
• Vinamul 3265 and Mowilith DC also perform very well in the wet crumple test.
• Mowilith DC has very good results in the wash test.
• Mowilith DC provides very good results in terms of adhesiveness, but the invention is not limited to a particular adhesive.
• the adhesive is not present in the form of fibers or in particulate form.
• the incorporation of the adhesive into the security tape can be done by coating.
• the coating may be carried out at least partially at the core, that is to say reach in depth, or even in totality the security tape, or at the surface.
• the coating is performed on the support used for the manufacture of the tape before cutting the support.
• the coating can be performed during the manufacture of the support for the manufacture of the security tape.
• the coating can be performed on one side of the support or on both sides of the support.
• the adhesive can completely cover the face on which it is deposited.
• the incorporation of the adhesive tape security can also be done by impregnation, by dipping the tape or the support for making it in a bath.
• the safety tape retains its own cohesion after introduction into the fibrous substrate.
• the structure of the security tape may be observable after its introduction into the fibrous substrate under certain conditions, for example in section or by vision in reflection or transmission.
• the adhesive for example the heat-sealing varnish, in the form of bubbles, for example using a scanning electron microscope (SEM).
• the security tape may be observable by topography in the sheet.
• the security tape can be observed by transparency in the sheet, in particular with the naked eye.
• the security tape may comprise at least one security element on one of its faces, or even on each of its faces.
• the security tape may have different security features on each side.
• the security tape may have irregularly shaped edges, for example in the form of broken or wavy lines, crenellations, zigzag, among others.
• the edges of the security tape may have the same shapes or different shapes, regular or irregular.
• the security tape may be transparent or translucent or even opaque, for example a dark appearance, especially darker than the substrate. It can be introduced or not into the fibrous substrate window. The introduction in window can in particular make it possible to obtain different variations of opacity when the security tape is opaque.
• the security tape can optionally be combined with a strip of thermoplastic material and / or metal, for example PET, laminated or hot rolled to the ribbon before its introduction into the fibrous substrate.
• the security tape can still have different characteristics perceptible for example to the sight or touch.
• the security tape may for example be embossed, thus creating a particular effect, for example a touch or surface relief, the ribbon may appear partially on the surface of the fibrous substrate.
• the security tape may be coated with a thermoplastic polymer and optionally embossed as a result of this coating.
• the security tape can be printed with drops of varnish, resin or thermo-inking ink, among others.
• the security tape may comprise a heat-reflecting ink for creating at least one relief, this ink being activated before introduction of the ribbon in the fibrous substrate. Activation before incorporation reduces the risk of destructuring the sheet during swelling of the ink.
• the security tape may comprise particles, for example detectable with the naked eye or with the touch, introduced in mass in the security tape, for example in the form of balls, for example balls of a synthetic material, for example the polyurethane, or mineral, for example glass, of dimension for example less than 300 microns, or by deposition by screen printing or gravure, for example in the form of beads, for example less than 100 microns in size.
• the security tape may comprise a textile band, for example knitted, integrated ribbon or laminated tape.
• the security tape may include an embossed print, for example screen printed.
• the safety tape may have a greasy, rough, smooth, silky, soft look, among other things.
• the security tape may in particular comprise polymer deposits, in particular in the form of beads, for example polyurethane (PU) beads, glass, polyamides 6 or 12, styrene-acrylic pigments, polypropylene (PP) waxes or beads, polyethylene (PE), polyvinyl chloride (PVC), methyl methacrylate-based polymers, the ribbon being for example introduced in window.
• polyurethane (PU) beads for example polyurethane (PU) beads, glass, polyamides 6 or 12, styrene-acrylic pigments, polypropylene (PP) waxes or beads, polyethylene (PE), polyvinyl chloride (PVC), methyl methacrylate-based polymers, the ribbon being for example introduced in window.
• PU polyurethane
• PP polypropylene
• PE polyethylene
• PVC polyvinyl chloride
• methyl methacrylate-based polymers for example introduced in window.
• a fibrous sheet preferably of light weight, for example between about 15 and 90 g / m 2 , according to a current papermaking process, that is to say for example by draining a suspension of fibers optionally comprising conventional fillers and additives in stationery, the possible specific safety elements, pressing of the fibrous mat obtained and drying.
• This sheet is then optionally calendered which allows in particular to reduce its thickness, and then cut to form ribbons which are then wound into coils.
• the addition of the adhesive to the security tape may in particular be done by a coating process, for example a coating, or by processes resulting from printing techniques of a paper base after its manufacture, for example coating air-blast, rotogravure, screen printing, curtain coating, flexography, among others.
• a coating process for example a coating
• processes resulting from printing techniques of a paper base after its manufacture for example coating air-blast, rotogravure, screen printing, curtain coating, flexography, among others.
• a photogravure process is used.
• the coating of the security tape can be done during the manufacture of the fibrous sheet, for example by surface coating on encapsulating press or by impregnation.
• the coating of the adhesive for example on a fibrous sheet used for the manufacture of the ribbon, can be carried out for example at a rate of 2 to 15 g / m 2 per side, preferably between 3 and 8 g / m 2 per face.
• the sealing temperature can vary between 70 and 135 0 C, for example, depending on the adhesive used, and the sealing can take place during the drying of the security sheet.
• a 20 g / m 2 fibrous sheet having undergone a wet strength treatment is coated with an adhesive in the aqueous phase at a rate of 5 g / m 2. m 2 per side, using a rotogravure process for example. This gives a satisfactory compromise between adhesion power and amount of coated material.
• the introduction of said security ribbons within said fibrous substrate can in particular be done according to the introduction modes of the plastic security threads of the art. prior as described above or by laminating said security tapes between two sheets or fibrous layers which then constitute the base of said fibrous substrate.
• Said security sheet proposed by the Applicant comprises at least one paper security tape which may be wider than said security threads of the prior art without presenting fibrous overlap defects or insufficient bridging as described above. This results in particular from the permeability of said paper security ribbons which promotes drainage, as well as the good affinity between the fibers of said paper security tape and the fibrous material of said substrate.
• said security tapes can be incorporated in said fibrous substrate without causing an increase in the frequency of breakage of the sheet, and this in particular because of the preferred composition of said paper security tapes.
• said security tapes preferably comprise hydrophilic fibrous materials, in particular such as cellulosic fibers or synthetic fibers or optionally mineral fibers treated by sizing, so as to develop with said fibrous substrate bonds making it possible to reduce its embrittlement due to in particular to the introduction of an element into said fibrous base.
• the size is a fiber coating that allows in particular to make them hydrophilic.
• the present invention can achieve if desired said elements in a band whose boundaries are clear and within which the distribution of security elements is homogeneous.
• said substrate comprises, in addition to said security tape, at least one security element, in particular chosen from tracers, in particular nanoscale, security fibers, in particular metallic, magnetic (to soft and / or hard magnetism), or absorbent or excitable in the ultraviolet (UV), the visible or the infrared (IR) and in particular the near infrared (NIR), the flat and relatively small security elements such as that the boards, the pigments or agglomerates of pigments in particular absorbing or excitable under Laser illumination or in the ultraviolet (UV), the visible or the infrared (IR), in particular the near infrared (NIR), and the security threads (Generally based on plastics, in particular of polyester) comprising in particular an at least partial coating, metallic, metallized, iridescent or magnetic (with soft magnetism and / or hard), said coating being able in particular c have positive or negative motives and said patterns may in particular be obtained by demetallization, the chemical or biochemical reagents for
• Said fibrous substrate may in particular comprise security elements visible to the naked eye, but it may also comprise tracers which are in the form of active material, particles or fibers, capable of generating a specific signal when these tracers are subject to to optronic, electrical, magnetic or electromagnetic excitation.
• tracers constitute an identifiable substance through a distinctive property and used to mark an element (a security document in this case) and ensure its follow-up, the follow-up of its evolution or allow its recognition, authentication or identification.
• the dielectric structures with a mirror effect consist of an alternation of high and low index layers, for example respectively of Hafnium dioxide and of silica, and may in particular be obtained by ion etching.
• the paper security tape may be based on cellulosic fibers (in particular cotton fibers) and / or natural organic fibers other than cellulosic and / or synthetic fibers, for example such as polyester or polyester fibers. polyamide, and / or optionally mineral fibers, for example such as glass fibers.
• the safety tape may not include polyvinyl alcohol (PVA) fibers.
• said fibers are hydrophilic, in particular so as to develop chemical bonds, mainly hydrogen, with said fibrous substrate.
• said security tape comprises by weight at least 50% of cellulosic fibers.
• the fibrous substrate is based on fibers as described above for the ribbon.
• the fibrous substrate and said security tape are based on the same fibers, that is to say that their fiber composition is the same in nature and preferably in the same proportions, this allows good affinity between the two components and may, in addition, be an additional means of authentication.
• said security tape has a width of between 2 and 60 mm, preferably between 4 and 30 mm and more preferably between 10 and 20 mm.
• said security tape may comprise perforations, in particular to promote drainage during the manufacture of said security sheet.
• said security tape has a thickness of between 20 and 120 ⁇ m, preferably between 30 and 80 ⁇ m, and more preferably between 45 and 55 ⁇ m.
• said security tape comprises at least one watermark pattern.
• said fibrous substrate comprises at least one watermark pattern.
• said fibrous substrate and said security tape each comprise at least one watermark pattern, said patterns being completed by superposition and / or association.
• said watermarked patterns can be superimposed so as to obtain a moire effect.
• Such an effect reveals a particular pattern produced by the approximation of lines during the superposition of two patterns of periodic structure and in particular screened.
• the security tape may include a watermark and possibly perforations around this watermark.
• the security tape can still be colored, in particular having a different color from that of the substrate.
• a filigree producer another advantage of the invention in the case of a watermarked tape is the use of its usual sheet making tools and methods. For example, it produces a stock of filigreed papers, colored or not, which it cuts and stores in ribbons. At the desired moment, these ribbons will then be introduced during the production of safety sheets, which will allow the paper manufacturer to work with a "vellum", that is to say not embossed. Indeed the embossing of the fabric that allows the formation of watermarks on the security sheets of the prior art has the disadvantage of requiring several days of work.
• said paper security tape comprises at least one security element chosen from tracers, in particular nanoscale, security fibers, especially metallic, magnetic (with soft magnetism and / or hard), or absorbing or excitable in the ultraviolet (UV), the visible or the infrared (IR) and in particular the near infrared (NIR), the flat and relatively small security elements such as boards, pigments or pigment agglomerates particularly absorbent or excitable under laser illumination or in the ultraviolet (UV), visible or infrared (IR), in particular the near infrared (NIR), and security son (based on plastics, especially polyester) comprising in particular an at least partial coating, metallic, metallized, iridescent or magnetic (with soft and / or hard magnetism), said coating being able to include, in particular, positive or negative patterns, and Motifs may in particular be obtained by demetallization, the chemical or bio
• tracers in a security document by means of a security paper tape is located, which allows in particular to create an area, possibly invisible to the naked eye, recognition and / or authentication of said security document.
• the recognition and / or authentication of said document may in particular be based on the intensity and / or the type of the signal generated by the tracers, considered individually or not, on the density of the tracers, or on their spatial distribution in a zone. predefined or not of the document.
• randomly distributed tracers can form a unique signature and thus be used for identification purposes.
• the introduction into a security sheet of pigments or agglomerates of absorbent pigments in the infrared or near infrared as mentioned above, can be used to make said sheet authenticatable, as described in the patent application WO 2005/034049.
• This same application recommends more particularly the use of kaolin and talc mixed, products that are common in the paper industry, in a security sheet area called variable distribution and especially watermarked.
• the use of these compounds makes it possible, in particular, to authenticate said security sheet by infrared spectroscopy, in particular near-infrared spectroscopy, and better optical reading of bar-coded watermarks.
• the present invention thus makes it possible to solve the above problem, for example by providing a security sheet comprising a filigree security tape based on fibrous material and a mixture of kaolin and talc in a proportion sufficient to promote spectroscopic authentication. infrared of said document or optical reading of said watermark. Indeed, the kaolin and talc content will be particularly high, but only in the zone containing said security tape, so that said security sheet comprising said security tape respects the upper limits of the ash levels inscribed in said specifications.
• an advantage of the invention relates for example to the authentication of a security document by analyzing the signal of the magnetic response.
• sowing that is to say in the fibrous suspension mixture before it is dewatered
• soft magnetic fibers makes it possible, in a reproducible manner, to homogeneously distribute said magnetic soft fibers .
• the introduction of said magnetic soft fibers in strip according to the prior art that is to say in a round shape by localized supply ducts or by laminar flow over a flat table, induced a certain variability in the concentration of said magnetic soft fibers, but also in the width of said magnetic soft fiber band.
• the invention makes it possible to reproducibly obtain a homogeneous distribution of said magnetic soft fibers.
• concentration of magnetic soft fibers and the width of said introduced security tape the number of "signatures" or possible magnetic signals is multiplied.
• said paper security tape comprises at least two security elements chosen from those mentioned above.
• said paper security tape comprises between 0.1 and 1% by dry weight of magnetic fibers, in particular with soft magnetism, with respect to the total amount of fibers, and preferably between 0 , 2 and 0.6%.
• said paper security tape comprises a plurality of small boards divided according to a surface density of between 4000 and 25000 boards / m 2 , preferably between 5000 and 20000 boards / m 2 and more preferably between 11000 and 18,000 boards / m 2 .
• said security tape comprises a series of parallel safety wires, and more particularly the succession of inter-wire spaces and / or the series of different widths of said safety wires constitute a code, in particular barcode type.
• said paper security tape comprises a magnetic magnet anti-theft wire.
• This type of antitheft security wire can be very sharp and therefore difficult to incorporate into a security sheet, it happens in particular that said antitheft wire, when introduced according to the prior art that is to say directly in a fibrous substrate, is not completely covered with fibers.
• the incorporation of such an antitheft security wire according to the The present invention consists in the manufacture of a fibrous sheet in which several anti-theft security threads are introduced, said security sheet thus obtained then being cut into ribbons comprising at least one anti-theft thread. These ribbons are then introduced into said fibrous substrate.
• the areas of said security tape which may have fibrous covering defects are covered by the fibrous material of said fibrous substrate, and thus a security sheet is obtained comprising at least one anti-theft security thread and free of covering defects.
• said security tape comprises at least one electronic device.
• said electronic device is a radio frequency identification device, more commonly referred to as an RFID device, and in particular an electronic chip and / or an antenna which can notably be printed on said paper security tape.
• said paper security tape comprises at least one chemically or biochemical chemical tampering and / or authentication and / or identification reagent reacting in a colored manner, with at least one agent respectively of falsification and / or authentication and / or identification.
• a paper security tape comprising a chemical or biochemical tampering reagent reacting in a colored manner with at least one tampering agent can in particular be located on an area of variable entries that may be falsified.
• this zone includes the areas intended for registration in figures and letters of the amount of the said check or the name of the recipient of the check.
• said paper security tape comprises a chemical or biochemical authentication reagent reacting in a colored manner with at least one authentication agent, additional security of the security sheet containing said paper security tape is obtained, the reaction of authentication being in fact located on the area where said paper security tape has been incorporated.
• Another advantage of the above particular case is to be able to use at least one tamperproofing reagent in documents intended to receive a surface treatment, in particular to promote the adhesion of the ink during the personalization of said documents.
• the reagents of this type are generally not used because they are reagents incompatible with the mixtures of colloidal dispersions of polymers.
• (Latex) commonly used in the composition of said surface treatments of papers by way of example, mention may be made of the latex of the styrene-butadiene polymer sold under the name Latexia 301 by the company Ciba.
• the invention therefore makes it possible to incorporate said reagents in said paper security tape and to apply at least one of said surface treatments to said fibrous substrate without encountering this type of problem. .
• This particular case has the further advantage of allowing the use of tamperproofing reagents which react with certain adhesives, and in particular those used on adhesive-coated sheets, in particular for visas to be pasted on passports or for safety films bonded to some security documents.
• tamperproofing reagents which react with certain adhesives, and in particular those used on adhesive-coated sheets, in particular for visas to be pasted on passports or for safety films bonded to some security documents.
• said fibrous substrate comprises at least one chemically or biochemical chemical tampering and / or authentication and / or identification reagent reacting in a colored manner, with at least one agent respectively of falsification and / or or authentication and / or identification.
• said paper security tape and said fibrous substrate each comprise at least one chemically or biochemical chemical tampering and / or authentication and / or identification reagent reacting in a colored manner, with at least one respectively tampering agent and / or authentication and / or identification.
• Said chemical or biochemical infalsification and / or authentication and / or identification reagents are preferably different and can in particular react with one and the same agent or with two different agents.
• said security tape and said fibrous substrate of the security sheet each comprise at least one chemical or biochemical reagent for tampering and / or authentication and / or identification, these reagents being chemically incompatible.
• chemically incompatible is meant that the reactants can react together because they are in contact or involve chemical reactions, with falsification or authentication and / or identification agents, which are incompatible.
• the use of a single fibrous substrate sometimes prevents the combination of some of said chemical or biochemical infalsification and / or authentication and / or identification reagents which, inserted in a common substrate react together (incompatible reagents).
• said chemical or biochemical reagents for tampering and / or authentication and / or identification may be compatible but give rise to incompatible reactions during the attempt to falsify or to the authentication or identification of said security document that make said document is not damaged during its forgery or that the authentication reaction does not give the expected result.
• the use of at least one ribbon according to the invention therefore has the particular advantage of allowing the implementation of at least two reagents or incompatible reactions.
• said security tape comprises perforations in a pattern or a code.
• said pattern or code is observable, or observable only in transmitted or observable light in both transmitted light and reflected light. If said security tape has an invisible fluorescent print, said pattern can also be visible only under UV illumination.
• said perforation pattern comprises at least one alphanumeric character or an ideogram.
• said paper security tape comprises perforations in a pattern and further comprises a chemical reagent or biochemical for tampering and / or authentication and / or identification reacting in a colored manner.
• said chemical or biochemical reagent reacts with the falsification and / or authentication and / or identification agent according to a reaction that gives a particular coloration to said paper security tape.
• Said pattern made by perforation then becomes visible by contrast between the coloring of said paper security tape and that of said fibrous substrate.
• said security tape is calendered. This calendering is carried out in particular to minimize the extra thickness created by the introduction of said paper security tape.
• said security tape is free of a surface coating, in particular free of a pigmented layer.
• said good affinity between said fibrous substrate and said security tape is thus favored.
• said security tape comprises a water-activatable adhesive agent, for example a polyvinyl alcohol (PVA), in particularly partially hydrolyzed.
• PVA polyvinyl alcohol
• said paper security tape has a wet strength (REH) with respect to traction greater than 30%, in particular so as not to cause problems when introduced into said security sheet.
• the resistance in the wet state in tension is measured by dividing the value of the wet tensile strength measured according to the NF Q 03.056 standard by the dry tensile strength measured according to the NF EN ISO 1924 standard.
• wet state may in particular be provided in a conventional manner by the addition of a wet strength agent, for example such as a polyamine-amide-epichlorohydrin resin (PAAE), a melamine formalin resin, etc.
• PAAE polyamine-amide-epichlorohydrin resin
• melamine formalin resin etc.
• an additional wet strength may be obtained by adding a portion of the REH agent (s) in surfactant baths of a fibrous sheet, for example for the manufacture of the fibrous web. security.
• said security tape is comprised in mass or in window in said fibrous substrate.
• the ribbon may appear only on one side of the sheet in a window or appear on each face of the sheet in a through window.
• said fibrous substrate has a fibrous monolayer, in particular a single-ply, or several fibrous layers, in particular multijet.
• said fibrous substrate comprises two fibrous layers, in particular a bijet structure.
• said security tape and at least one of the layers of said fibrous substrate have different colors. This achieves a higher security due to the presence of two fibrous layers of different colors in the same security sheet.
• said substrate of the security sheet and the security tape are of different colors and each comprise a watermark pattern.
• the security of said security document is thus improved because of the presence of two watermarks of different coloring to be counteracted, in particular because the use of transparent inks, commonly used to counterfeit watermarks, does not make it possible to create such color effects.
• this security allows rapid authentication of said security document, the coloring of said watermarks being easily observable in transmitted light.
• said fibrous substrate comprises at least two paper safety ribbons as described above.
• said security sheet comprises two security tapes, it is then possible that they respectively contain two different reagents giving, by reaction with a single developer, two different localized colors. It is also possible that said security tapes react specifically to two different agents to give, in a localized manner, two different colors or not.
• the invention also relates to a process for the papermaking of said security sheet described above wherein said fibrous material-based security tape is introduced at a wet end into said fibrous substrate. Said substrate - ribbon assembly thus obtained is then pressed and dried.
• said security tape is introduced in wet part, in bulk or in window in said fibrous substrate.
• known methods can be used to introduce plastic security threads of the prior art.
• the ribbon may have any of the features detailed above, or any combination thereof.
• the method uses a paper machine which is equipped with at least one round shape, and said security tape is introduced into the shaped tank of said round shape, before or shortly after the start dewatering the composition forming said fibrous substrate of the sheet.
• the method uses a paper machine which is equipped with at least one flat table, and said paper security tape is introduced above said flat table, during the dewatering of the paper. composition forming said substrate of the sheet.
• said fibrous substrate comprises at least two jets, and said safety tape is introduced before wet assembly of two successive jets, that is to say, according to the method papermaker current, before drying the entire security tape -fibrous matters of the substrate.
• said paper security tape as described above is incorporated by laminating between two fibrous layers of said fibrous substrate of said security sheet.
• said paper security tape may appear in the window, especially if at least one of said layers comprises perforations or areas devoid of material.
• the invention also relates to the paper security tape as described above.
• the invention also relates to a security document comprising a security sheet as described above.
• This document can be manufactured by cutting, binding, binding, rolling, gluing and / or laminating this security sheet. More particularly said security document is a means of payment, such as a bank note, a check or a restaurant ticket, an identity document such as an identity card or a visa or a passport or a permit. driving, a lottery ticket, a ticket or an entrance ticket to cultural or sports events.
• the invention also relates to an article to be authenticated comprising said security sheet as described or obtained previously, said article being chosen from a security label, a packaging, in particular a packaging for the drugs or for food or for perfumes or for electronic parts or for spare parts, a sheet used in the medical or hospital field, including a paper used to make sterilization packaging, and still a paper art.
• the invention also relates to a method for authenticating a security sheet comprising a security tape which comprises at least one chemical or biochemical tamper and / or authentication and / or identification reagent reacting in a colored manner with at least one falsification and / or authentication and / or identification agent respectively, as well as perforations according to a pattern or a code.
• a security tape which comprises at least one chemical or biochemical tamper and / or authentication and / or identification reagent reacting in a colored manner with at least one falsification and / or authentication and / or identification agent respectively, as well as perforations according to a pattern or a code.
• the reaction between said reagent and said agent produces a coloration of said security tape which renders said pattern or said perforated code readable .
• the said method is therefore characterized in that the reaction between said tampering and / or authentication and / or identification reagent and an agent respectively for falsification and / or authentication and / or identification gives a coloring said paper security tape making said perforations, in particular said pattern or said perforated code, observable on said security tape.
• the invention also relates to a security sheet comprising a fibrous substrate in which is incorporated, at least partially, a security tape, preferably comprising at least one security element, extending between two edges.
• a security tape preferably comprising at least one security element, extending between two edges.
• said fibrous substrate, said security tape being made of paper and having a watermark.
• the ribbon may have one or more of the above features.
• the invention also relates to a security sheet comprising a fibrous substrate in which is incorporated, at least partially, a security tape, preferably comprising at least one security element, and extending between two edges of said fibrous substrate, said security tape being made of paper and having a different color than at least one layer of said fibrous substrate.
• a security tape preferably comprising at least one security element, and extending between two edges of said fibrous substrate, said security tape being made of paper and having a different color than at least one layer of said fibrous substrate.
• different color is meant a color difference visible to the naked eye.
• the ribbon may have one or more of the above features. The invention will be better understood on reading the non-limiting examples and the figures which follow.
• a security sheet comprising a paper security tape comprising as security element boards having a fluorescent invisible printing and incorporated in a filigree fibrous substrate.
• a sheet of paper is made on a flat-table paper machine.
• the plates printed with a fluorescent ink are added to the aqueous suspension of refined cellulose fibers in the order of 30 ° C., the fibrous mat containing these boards is pressed into seedling and dried.
• Said sheet obtained once dried has a basis weight of 45 g / m 2 .
• said security tapes are introduced in mass into the round shape of the shape tank.
• a security sheet according to the invention is obtained, shown in FIG. 2 and in a section through the thickness in FIG.
• a security sheet comprising a paper security tape comprising, as a security element, soft magnetism fibers embedded in a fibrous substrate.
• a sheet is made on a flat-bed paper machine according to the traditional method, that is to say by draining, pressing and then drying an aqueous suspension of refined cellulose fibers at 32 ° SR.
• Said soft magnetic security fibers are fibers of an alloy of nickel and iron called Supermalloy ® . These fibers have a diameter of 10 ⁇ m and an average length of 3 mm and are introduced as a mixture into the fibrous suspension at a level of 0.7% by weight relative to the fibrous composition in the leading vat, that is to say say before the formation of said sheet.
• a sheet of a grammage of 35 g / m 2 is obtained which is then calendered, coated with adhesive, for example by gravure on both sides with MOWILITH DC adhesive at a rate of 5 g / m 2 per side, then cut into ribbons 3.5 cm wide.
• the ribbons may be reeled.
• the security sheet is made on a flat-bed paper machine by mass-introducing said security strips into the fibrous composition forming the substrate.
• the safety ribbons are introduced during dewatering, between the fibrous mat forming and the dough roll located on the forming table, and the sheet is then pressed. After drying, the security sheet thus obtained has a basis weight of 100 g / m 2 .
• the homogeneous distribution of magnetic fibers in the ribbon and the regular width of said security tape make it possible to authenticate and / or identify said security sheet reliably.
• the coating with the adhesive is not carried out, all the other steps being reproduced elsewhere.
• the deposition of the adhesive is carried out by means of an encapsulating press.
• the fibrous substrate of the sheet is formed in which said security strips, at the mark and in the window, are introduced, according to the method of introducing security threads onto a round-shaped paper machine described in FIG. patent application EP 059 056.
• the resulting security sheet thus comprises an iridescent coating appearing according to dashed lines because of the window introduction of said security tape.
• the adhesive is deposited on the layer of pigments.
• a security sheet comprising a white natural color fibrous substrate comprising a watermark and a yellow paper security tape comprising a watermark.
• Said ribbon and said substrate form a security sheet such that the two watermark patterns complement each other.
• a paper of yellow color and watermarked in a pattern representing a hair is produced from an aqueous suspension of refined cellulose fibers at 40 ° SR comprising a yellow dye.
• the surfacing and coating free sheet thus obtained weighs 70 g / m 2 , it is then calendered, coated by gravure printing of MOWILITH DC on both sides at a rate of 5 g / m 2 per side, then cut into strips of 5 cm wide.
• Such a security tape is shown in Figure 4b.
• the fibrous substrate of the sheet is formed from an aqueous suspension of refined cellulose fibers of the order of 38 ° SR and a filigree pattern is formed according to a face completing the filigree hair of the ribbon. ; said security strips are introduced into the mass of the substrate forming the mark so that the watermarks of the ribbon and the substrate complement each other to form a face.
• said security tapes are introduced during the dewatering of the fibrous suspension on the round shape, in the form tank. After pressing and drying, a sheet is obtained whose weight is 80 g / m 2 .
• the resulting security sheet therefore comprises a two-color watermark visible in transmitted light, such as that shown in FIG.
• the tape is not coated with adhesive, because it is not the strong adhesion of the ribbon in the substrate is sought.
• This example implements aspects of the invention independent of the presence of adhesive on the ribbon.
• a security sheet comprising a fibrous substrate comprising an authentication chemical reagent reacting in a colored manner to an external authentication agent which may be present in a pen.
• authentication and a security paper tape which itself comprises an authentication chemical reagent reacting in a colored manner to the authentication agent present in said pen.
• a sheet of the overlay type is formed on a flat-table machine from an aqueous suspension of refined cellulose fibers, of the order of 30 ° SR, and a paranitrophenol composition is introduced by surfacing the sheet in the press. gluer.
• This sheet of paper has a grammage of 30 g / m 2 and therefore includes paranitrophenol as an authentication chemical reagent that can react on its entire surface in a colored manner with soda (sodium hydroxide) weakly concentrated, the soda being the external authentication agent contained in the pen. Paranitrophenol is colorless and yellow in the presence of weakly concentrated sodium hydroxide.
• the coating-free sheet thus obtained is then calendered and then cut into strips of 2 cm wide.
• the substrate of the sheet is made on a round paper machine from an aqueous suspension of cellulosic fibers comprising another authentication chemical reagent also reacting in a colored manner with weakly concentrated sodium hydroxide.
• This reagent is a colored indicator for check derived from xanthene, it is colorless and takes a blue color in the presence of weakly concentrated soda, which is the authentication agent contained in said pen.
• Said security tapes obtained previously are introduced in bulk during the formation of said substrate, according to a common method of mass introduction of security threads on a round-shaped paper machine as described in Example 4.
• the resulting security sheet has a basis weight of 80 g / m 2 .
• This sheet is authenticatable with an increased level of security. Indeed, by using on said sheet an authentication pen containing weakly concentrated sodium hydroxide, a first blue color appears on the areas where there is no paper security tape and a second green color on the areas above said paper security tape, said green color resulting from mixing the yellow and blue colors respectively of said paper security tape and said fibrous substrate.
• FIG. 1 represents a front view under UV illumination of a security tape 1 comprising boards 4 printed with an invisible fluorescent ink.
• FIG. 2 represents a front view under UV illumination of a security sheet 2 containing said security tape 1 of FIG. 1.
• FIG. 3 represents a section in the thickness according to (AA ') of the security sheet 3 which is the subject of the invention, represented in FIG. 2.
• FIG. 4 represents, in a front view, an object of the invention 3 comprising a security sheet 2 shown in FIG. 4a in which is incorporated a watermark paper security tape 1 shown frontally in FIG. 4b.
• FIG. 5 represents a front view of a security sheet 3 which is the subject of the invention, in which is incorporated a security ribbon of paper 1 perforated according to a text and which comprises a tampering reagent reacting in a colored manner to the agents of falsification.
• FIG. 6 represents a transparency image of a security sheet according to the invention, comprising a security tape.
• FIG. 7 represents a topographic image of a security sheet according to the invention, comprising a security tape.
• the paper security tape 1 shown in FIG. 1 is 1.5 cm wide and is secured by boards 3 of about 3 mm printed with invisible fluorescent ink so that they are visible only under illumination. UV.
• the distribution of said boards 4 in said paper security tape 1 is homogeneous and their observation under UV illumination shows a band whose edges are relatively regular.
• An object of the invention 3 is shown in Figure 2, it consists of a security sheet 2 of dimensions 6 x 12 cm comprising in its mass a paper security tape 1 secured by said boards 4 and shown on the This security paper tape 1 is introduced at a distance of 2 cm from the edge of the security sheet 2.
• Said boards 4 being invisible fluorescent, they are invisible if they are observed transmitted and / or reflected light .
• said boards 4 under UV illumination, said boards 4 can be seen arranged in a strip corresponding to said paper security strip 1, of homogeneous distribution and with relatively regular edges.
• FIG. 3 A section along (AA ') of FIG. 2 is shown in FIG. 3.
• This section in the thickness of said security sheet 3 which is the subject of the invention reveals said paper security strip 1 comprising said boards 4 and contents in the mass of the security sheet 2.
• Another object of the invention 3 is shown in FIG. 4. It comprises a fibrous substrate 2 of dimensions 6 ⁇ 12 cm, filigree and whose watermark represents a face 5a as shown from the front in FIG. 4a, as well as FIG. a safety tape paper 1 5 cm wide, yellow and watermark, whose watermark represents a hair 5b as shown in Figure 4b.
• Said security sheet 3 comprising said paper security tape 1 at a distance of 4 cm from its edge is shown in FIG. 4, it contains a watermark 5 representing a head composed of a yellow hair 5b and a face 5a. in shades of gray.
• An object of the invention 3 is shown in Figure 5, it comprises a security sheet 2 of dimensions 6 x 12 cm and in the mass of which is incorporated a paper security tape 1 of 2 cm wide and which comprises perforations 6 with a diameter of 2 mm, as well as a manganese sulfate which will act as an undyed anti-tampering reagent. Said perforations 6 form the word "FALSIFIE”. During normal use of said object of the invention 3, said paper security tape 1 and said perforations 6 are not observable either in transmitted light or in reflected light.
• the security tape can be detected in various ways after incorporation into the security sheet.
• the ribbon can be detected by direct observation of the security sheet, to the naked eye in reflected light or transmitted light. Differences in hue, appearance, and / or opacity between the ribbon and the fibrous substrate may determine the presence of the ribbon.
• FIGS. 6 and 7 are respectively images of the security sheet by transparency and by topography.
• the security tape by the presence of the adhesive, for example a heat-sealing varnish, which can be observed in the form of bubbles by observation by scanning electron microscope (SEM).
• SEM scanning electron microscope

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• 2006
  • 2006-10-12 FR FR0608949A patent/FR2907136B1/fr active Active
• 2007
  • 2007-10-11 WO PCT/FR2007/052126 patent/WO2008043965A2/fr active Application Filing
  • 2007-10-11 EP EP07858556.9A patent/EP2082097B1/de not_active Revoked
  • 2007-10-11 PL PL07858556T patent/PL2082097T3/pl unknown
  • 2007-10-11 ES ES07858556.9T patent/ES2553888T3/es active Active
  • 2007-10-11 BR BRPI0719827A patent/BRPI0719827B1/pt active IP Right Grant
  • 2007-10-11 US US12/443,550 patent/US8376409B2/en active Active
  • 2007-10-11 CA CA002672752A patent/CA2672752A1/fr not_active Abandoned

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