EP3623528B1 - Procede de fabrication d'un materiau en feuille, machine, materiau en feuille et document de securite correspondants - Google Patents

Procede de fabrication d'un materiau en feuille, machine, materiau en feuille et document de securite correspondants Download PDF

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Publication number
EP3623528B1
EP3623528B1 EP19196611.8A EP19196611A EP3623528B1 EP 3623528 B1 EP3623528 B1 EP 3623528B1 EP 19196611 A EP19196611 A EP 19196611A EP 3623528 B1 EP3623528 B1 EP 3623528B1
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EP
European Patent Office
Prior art keywords
layer
fibers
paper
longitudinal
strip
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.)
Active
Application number
EP19196611.8A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3623528A1 (fr
Inventor
Nick Rico MULDER
Albertus Karel JANSSEN
Marjory LE BERRE
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.)
Oberthur Fiduciaire SAS
Original Assignee
Oberthur Fiduciaire SAS
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 Oberthur Fiduciaire SAS filed Critical Oberthur Fiduciaire SAS
Priority to SI201930069T priority Critical patent/SI3623528T1/sl
Priority to PL19196611T priority patent/PL3623528T3/pl
Publication of EP3623528A1 publication Critical patent/EP3623528A1/fr
Application granted granted Critical
Publication of EP3623528B1 publication Critical patent/EP3623528B1/fr
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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/40—Manufacture
    • B42D25/405—Marking
    • B42D25/43—Marking by removal of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/40—Manufacture
    • B42D25/45—Associating two or more layers
    • B42D25/455—Associating two or more layers using heat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/40—Manufacture
    • B42D25/45—Associating two or more layers
    • B42D25/46—Associating two or more layers using pressure
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/44—Watermarking devices
    • 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
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/30—Multi-ply

Definitions

  • the present invention relates to a method of manufacturing a material consisting of fibers and shaped into a strip.
  • the support usually used is made of paper. It has many advantages, in particular that of being able to integrate a certain number of security elements such as, for example, a watermark or a security thread.
  • Another advantage is, among other things, that it can be easily printed in intaglio, that is to say with reliefs easily detectable by touch. These elements are easily recognizable by the general public and provide a strong means of authentication.
  • This lamination process differs from the widely used hot transfer process.
  • the carrier film of the security elements is directly deposited on the support, as opposed to the hot transfer process according to which the carrier film is rewound after the thin film containing the security elements has been transferred to the medium.
  • the film has mechanical properties, water absorption and contraction / expansion different from that of the paper support, so that the film, especially when it is deposited in a strip over the entire height of a ticket , tends to cause a "curl” effect on the cut sheet paper (which means that the paper tends to curl locally).
  • a phenomenon of " curl " In English, we speak of a phenomenon of " curl " .
  • This technique responds to the problem of paper deformation but creates a problem of excess thickness on the paper reels at the level of the laminated film and the "counter-foil", due to the cumulative thickness at this location of the laminated film, of the paper. and the "counter-foil".
  • depressed areas are locally created in which the thickness of the paper is reduced and the presence of the cups is used to accommodate the aforementioned “foils” and “counter-foils” therein.
  • the thickness of the final product is drastically reduced in this zone.
  • WO 2007/042718 describes a method of manufacturing a sheet material having at least one window.
  • This window extends transversely to the direction of movement of the sheet material on the manufacturing machine ("running direction").
  • running direction the direction of movement of the sheet material on the manufacturing machine
  • the window is formed through the assembly of the two layers by spraying a pressurized fluid.
  • This fluid extends in the form of a brush, the width of which corresponds to the longitudinal extent of the window to be formed.
  • the pressure of the fluid is between 50 and 4000 bar, for example between 1000 and 2000 bar. We readily understands that this range of values is high and requires a significant amount of energy.
  • the present invention relates to a method of manufacturing a material consisting of fibers and shaped as strip, by wet papermaking, this material being multilayer and comprising a first layer of fibers and at least a second layer of fibers assembled together, a process during which each layer of fibers is formed individually by draining on a forming fabric in a forming section, then conveyed in a strip to an assembly section in which said layers are assembled to form the multilayer material, and then to a dewatering (more commonly called pressing) and drying section, characterized in that the removal, by means of a pressurized fluid, between said forming and assembly sections, of at least one longitudinal strip of fibrous material in only one of said layers so as to form therein a continuous longitudinal window, that use is made, for each longitudinal strip, of two pressurized fluid jets, which are positioned so as to delimit the opposite edges of said longitudinal window, and that the 'said jets are oriented converging, namely that they are oriented towards the center
  • the opposite edges of said longitudinal window are the edges oriented in the "running direction", i.e. parallel to the direction of movement of the material from the forming section to the dewatering and drying section.
  • the present invention provides a papermaking machine, sheet material, and security and / or valuable document.
  • This papermaking machine which has a forming section with at least two stations for forming a wet paper web in which are individually formed at least two layers of fibers, an assembly section in wherein said layers are assembled to form the multilayer material, as well as a pressing and drying section, is characterized by the fact that it comprises, between said forming section and assembly section, removal means, to using a pressurized fluid, at least one longitudinal strip of fibrous material in only one of said layers so as to form a continuous longitudinal window therein.
  • This single sheet paper material which comprises a first layer of paper and at least a second layer of paper assembled together, said first layer being a surface layer, is characterized in that said first layer of paper comprises at least one longitudinal window, the opposite edges of which converge in the direction opposite to said second layer, while said second layer has no window facing that of said first layer and is of constant thickness.
  • the opposite edges of said longitudinal window are the edges oriented in the "running direction”.
  • the security and / or value document is remarkable in that it consists, at least in part, of a material according to the preceding characteristic.
  • the present invention relates to a method of manufacturing a material consisting of fibers and shaped into a strip.
  • strip-shaped is meant that the material is manufactured continuously so as to constitute a single and unique strip of a few hundred to a few thousand meters in length. Of course, in the end, this strip will be cut into a series of individual sheets.
  • This process is implemented in a machine for manufacturing such a material, which will be referred to below as a "paper machine”.
  • This paper machine M is represented partially and symbolically at the figure 1 . Only the sections of this machine are visible which are of interest in relation to the subject of the invention. This is in particular a training section 1 and an assembly section 2.
  • Such a machine advantageously comprises a set of presses, a dryer set and a press-size assembly not shown here.
  • the material produced in this machine is intended to be rolled up on itself.
  • the training section 1 comprises two training stations 10 and 11 which are substantially identical.
  • the station 10 comprises a tank 100 containing a suspension of fibers S which can be cellulose fibers, more particularly cotton, synthetic fibers, reconstituted natural fibers with or without additional chemical grafting or any mixture of at least two of these different fibers.
  • a rotating cylinder 101 in fabric which defines, when it is driven by a rotational movement in the direction counterclockwise to the arrow f, a peripheral surface in contact with which a layer 4 of fibers is continuously formed.
  • the second training station 11 comprises a tank 110 in which is contained a suspension S identical or different in composition from the first mentioned above and in which a cylinder 111 similar to cylinder 101 and with the same direction of rotation f is bathed. .
  • This second station makes it possible to form a second layer 5 of fibers. These fibers are of the same nature or of a different nature from that of layer 4.
  • the speed of rotation of cylinders 101 and 111 is one of the parameters which conditions the thickness of layers 4 and 5.
  • the aforementioned two cylinders are immersed in one and the same tank.
  • station 10 With respect to the direction of advance of layers 4 and 5 thus created, referred to as machine direction or running direction S M , station 10 is located upstream with respect to station 11.
  • the layers 4 and 5 are formed, they are pressed against and guided in the machine direction against a felt 3 which is designed to have good retention of the fine fibers and fillers contained in the layer of fibers but which remains sufficiently permeable to pass air and water.
  • the felt 3 is shown slightly removed from the layer 4, but only in order to clearly distinguish it from this layer.
  • Such a fabric is referred to as an SSB ( Sheet Support Binder ) fabric which qualifies a multilayer fabric whose binding threads are part of the structure, which makes it possible to bind the paper side to the machine side while serving as a support for the strip. constitution course.
  • interval I which is, in accordance with the invention, taken advantage of to proceed at this level, that is to say between the two stations.
  • sections of formation 1 and assembly 2 on removal with the aid of a pressurized fluid, of at least one longitudinal strip R of fibrous material in the single layer 4 formed within the station 10.
  • longitudinal strip is understood to mean a strip which extends in the direction of the strip being formed, in this case in the machine direction S M.
  • pairs of nozzles 7 are used which direct jets of fluid so as to have specific impact zones or quasi-punctual on the layer of fibers 4. This is shown in particular on figure 2 where the jets J thus make it possible to make very fine cutouts D within the layer 4.
  • the water content of the layers of fibers 4 and 5 is greater than 50% and advantageously greater than 70, or even 80%. Therefore, the fluid pressure that it is necessary to use to proceed with the removal of the tape R is relatively low and advantageously between 5 and 9 bars, due to the low mechanical strength of the layer of fibers at this stage. This is in no way comparable to the high pressures used in the state of the art, pressures which may be of the order of 1000 bar, or even higher.
  • the jets J are oriented convergently, namely that they are oriented towards the center of the longitudinal strip R to be removed, so as to form with the plane in which the layer 4 is contained an acute angle x ° between 45 and 90 ° and this in order to make a clean cut without bead on the edges of the layer 4 intended to be attached to the layer 5.
  • jets J with point or quasi-point impact zones which jets are inclined at the aforementioned angle x °, has many advantages. Among these, we particularly note the fact that a point jet requires less water pressure than a nozzle which would provide a jet in the form of a wide and flat brush.
  • the relative inclination of the jets J will make that the fibers of layer 4 hit by the jets are released towards the center of the window or fall by gravity as shown by the arrows g of the figure 3 .
  • This clearance towards the center of the window or this fall by gravity is facilitated by the shape conferred, in particular because of the relative inclination of the jets J, the cutouts D to the tape R.
  • the means 7 for spraying pressurized fluid and the means 8 for spraying pressurized air direct jets which are inclined in the longitudinal direction at angles y °, respectively z °.
  • the inclination according to the angle y ° makes it possible to make a cut in the layer of fibers in the direction of advance (machine direction S M ) of the strip of paper, which makes it possible to make a clean cut.
  • This angle can of course be adjusted according to the operating speed of the paper machine.
  • the angle z ° (oriented opposite to the angle y ° but without the absolute values of these angles being necessarily equal) and the distance of the air nozzles 8 from the fabric 3 can be adjusted to have a perfect detachment of the paper tape cut by the water jets.
  • these air nozzles must be positioned according to a careful registration vis-à-vis the area in which the water nozzles act. If they are badly positioned, they will peel off the edges of the layer 4 which must remain on the canvas 3 to join the second layer 5, thus generating defects on the final assembly.
  • the width of the pressurized air jet must be at most equal to the width of the strip R of cut paper. In an optimized setting, it can be narrower for more positioning flexibility.
  • nozzles 8 are positioned so that the ribbon R of paper falls back into a vat of pulp and is then recycled.
  • the window F which is formed in the layer 4 has longitudinal edges 40 which are generally inclined. This is of particular importance in the assembly 6 of the layers which is finally formed.
  • the angle x ° of the air nozzles is too high, that is to say too close to 90 °, then the cut is too blunt and practically perpendicular to the edges of the layer 4 of fibers remaining on the carpet and then sits visible on the final paper.
  • the border delimiting the window F is then clear with a marked difference in thickness generating a visible black line.
  • banks are formed at left and right of the cut tape R on layer 4, so that they are also visible on the final sheet.
  • the angle x ° is therefore in particular between 45 ° and 90 °, preferably between 45 ° and 85 ° and more preferably between 50 ° and 75 °.
  • a paper material is generated which comprises a first perforated layer 4 as well as a second layer 5 of constant thickness.
  • the window produced is not detectable with the naked eye but by vision systems, generally installed at the end of the paper machine. The area where the window is present is therefore controlled online and, if any drifts appear, the adjustment parameters of the water and air nozzles can be adjusted during production.
  • a tape 20 millimeters wide and a thickness of 12 micrometers with the following parameters: Setting Value Angle x ° 60 ° Angle y ° 65 ° Angle z ° 90 ° Pressure of the jets (J) of pressurized fluid (water) 7 bars Blown air pressure 2 bars Fiber layer (4) 15 g / m 2 Fiber Layer (5) 70 g / m 2
  • Nozzles 7 and 8 can be easily adjusted if they are mounted on a graduated rail.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Paper (AREA)
EP19196611.8A 2018-09-14 2019-09-11 Procede de fabrication d'un materiau en feuille, machine, materiau en feuille et document de securite correspondants Active EP3623528B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SI201930069T SI3623528T1 (sl) 2018-09-14 2019-09-11 Postopek izdelave ploščatega materiala, ustrezen stroj, ustrezen ploščati material in ustrezen varnostni dokument
PL19196611T PL3623528T3 (pl) 2018-09-14 2019-09-11 Sposób wytwarzania materiału w postaci arkusza, odpowiednia maszyna, materiał w postaci arkusza i dokument bezpieczeństwa

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1858276A FR3085974B1 (fr) 2018-09-14 2018-09-14 Procede de fabrication d'un materiau en feuille, machine, materiau en feuille et document de securite correspondants

Publications (2)

Publication Number Publication Date
EP3623528A1 EP3623528A1 (fr) 2020-03-18
EP3623528B1 true EP3623528B1 (fr) 2021-03-17

Family

ID=64049412

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19196611.8A Active EP3623528B1 (fr) 2018-09-14 2019-09-11 Procede de fabrication d'un materiau en feuille, machine, materiau en feuille et document de securite correspondants

Country Status (5)

Country Link
EP (1) EP3623528B1 (sl)
ES (1) ES2876199T3 (sl)
FR (1) FR3085974B1 (sl)
PL (1) PL3623528T3 (sl)
SI (1) SI3623528T1 (sl)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3431577A1 (de) 1984-08-28 1986-03-13 Heinr. Aug. Schoeller Söhne GmbH & Co KG, 5160 Düren Verfahren zur herstellung echter wasserzeichen in papier
MY102798A (en) * 1987-12-04 1992-10-31 Portals Ltd Security paper for bank notes and the like
FI104644B (fi) 1998-08-17 2000-03-15 Valmet Corp Menetelmä ja laite paperikoneella rainan siirtämiseksi formeriosalta puristinosalle
DE10217723A1 (de) 2002-04-20 2003-10-30 Voith Paper Patent Gmbh Wasserstrahl-Schneideinrichtung
DE102004014778A1 (de) 2004-03-26 2005-10-13 Leonard Kurz Gmbh & Co. Kg Sicherheits- und/oder Wertdokument
FR2891761B1 (fr) 2005-10-06 2008-04-04 Arjowiggins Security Soc Par A Procede de fabrication d'un materiau en feuille comportant au moins une fenetre.
FR2918679B1 (fr) * 2007-07-11 2017-12-01 Arjowiggins Licensing Sas Procede de fabrication d'un materiau en feuille.
FR3006795B1 (fr) * 2013-06-10 2016-12-09 Arjowiggins Security Structure de securite a element optique diffractif
EP2860040B1 (en) 2013-10-11 2016-12-07 European Central Bank A security element, a valuable document comprising a security element and method for manufacturing the security element and the valuable document

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP3623528A1 (fr) 2020-03-18
FR3085974B1 (fr) 2020-12-18
SI3623528T1 (sl) 2021-10-29
PL3623528T3 (pl) 2021-09-13
FR3085974A1 (fr) 2020-03-20
ES2876199T3 (es) 2021-11-12

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