Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
  • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
  • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
  • B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
  • B42D25/29—Securities; Bank notes
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
  • B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
  • B41M7/0045—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using protective coatings or film forming compositions cured by mechanical wave energy, e.g. ultrasonics, cured by electromagnetic radiation or waves, e.g. ultraviolet radiation, electron beams, or cured by magnetic or electric fields, e.g. electric discharge, plasma
• • 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
  • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
  • D21H17/03—Non-macromolecular organic compounds
  • D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
  • D21H17/11—Halides
• • 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
  • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
  • D21H17/20—Macromolecular organic compounds
  • D21H17/33—Synthetic macromolecular compounds
  • D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
  • D21H17/53—Polyethers; Polyesters
• • 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
  • D21H19/00—Coated paper; Coating material
  • D21H19/10—Coatings without pigments
  • D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
  • D21H19/20—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
• • 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
  • D21H21/18—Reinforcing agents
• • 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
  • D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
  • D21H25/04—Physical treatment, e.g. heating, irradiating
  • D21H25/06—Physical treatment, e.g. heating, irradiating of impregnated or coated paper
• • B42D2033/04—
• • 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
  • D21H19/00—Coated paper; Coating material
  • D21H19/10—Coatings without pigments
  • D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
  • D21H19/16—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising curable or polymerisable compounds
• • 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
  • D21H19/00—Coated paper; Coating material
  • D21H19/10—Coatings without pigments
  • D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
  • D21H19/24—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
• • 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
  • D21H21/36—Biocidal agents, e.g. fungicidal, bactericidal, insecticidal agents
• • 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

Definitions

• a succession of printing and securing processes leads to a final product with high added value.
• Effective deterrence is achieved by affixing several types of security at different levels.
• the first-level secure elements are elements detectable to the naked eye, in daylight or artificial and do not require the use of a particular device.
• So-called second level security are detectable elements using technologically modest devices such as UV or IR lamps. This allows the authentication of banknotes within various organizations (shops, banking centers, etc.). We can thus distinguish patterns or texts printed in invisible ink but visible under ultraviolet or infrared radiation, fluorescent fibers, magnetic threads etc.
• the third level of security requires sophisticated devices and, therefore, a high investment. It is mainly the central banks that examine these securities, such as the tracers present in the notes.
• natural fibers other than cotton may be flax or abaca
• synthetic fibers are based on polyethylene, polypropylene.
• the support may even consist exclusively of bi-oriented polypropylene.
• the anti-fouling coating it may be for example sauces based on polyurethane or latex. These last examples are of course not exhaustive, each high durability paper having its own particularities according to the different suppliers.
• WO02051638 is described a technique which consists in performing a varnishing flexographic support at the end of the ticket manufacturing process.
• This varnish affixed superimposed improves the stain resistance of the note and thus protects the print in its entirety.
• This UV-curing varnish is for example one of those proposed by Sicpa under the references SicpaProtect 889354 and 889405.
• Other references also work as the Schmidt Rhyner WESSCO Protector 36.298.42 varnishes and that of Actega TerraGloss UV Special Coating VP- HB 100-080.
• a soil test (the procedure of which will be described later) is characterized as the differential of measurement of the luminance L of a soiled sample and of an unsalted control sample on an unprinted portion.
• a white wove paper formed of 100% cotton has, when subjected to this test, an AL of about 20-30 units and this same paper varnish with reference SicpaProtect 889354 printed in flexography, with an anilox of 6 / 6.5 cm 3 (ie about 2g / m 2 transferred) an AL between 14 and 1 8, a gain of around 40%.
• Solvay offers fluorine-based products whose anti-adherent properties are well known.
• Several references have the desired hydrophobicity and oleophobicity properties, in particular two aqueous dispersions based on perfluoro polyether (PFPE, X- [- (CF 2 -CF 2 -O) m - (CF 2 0) n -] - X).
• PFPE perfluoro polyether
• a first product, referenced FOMBLIN or 51 34X contains PFPE-urethane
• another product, referenced 51 35X contains PFPE phosphate ammonium salts.
• Another reference based on PFPE-urethane and containing organic solvents is functionalized, that is to say that the base molecule also contains reactive chemical functions.
• the present invention relates to a method of surface treatment of a banknote which comprises, at least on one of its opposite faces, at least one impression consisting of at least one pattern, this face and its printing. associated with being coated with a transparent protective coating, characterized by the fact that a coating containing a varnish and an organic chemical compound incorporating fluorine atoms in the form of at least a perfluoro-polyether group, on said face, and that is proceeded to its drying.
• the treatment is compatible with the usual printing techniques, that is to say that the coating itself is printable;
• the treatment can be applied by the process of flexographic printing, gravure printing or screen printing; the treatment, once the security document has been manufactured and its coating dry, is compatible with an epidermal contact, without being known to be toxic or allergenic.
• said coating is printed on said face in the form of two distinct layers, namely firstly a first layer of varnish and then a second containing said organic chemical compound incorporating fluorine atoms in the form of at least one perfluorinated group; polyether in an aqueous base or in a solvent base;
• said organic chemical compound incorporating fluorine atoms in the form of at least one perfluoro-polyether group is in a solvent base compatible with the matrix of said varnish with which it is mixed, in a functionalized form that is to say capable to interact with the latter by forming chemical bonds in order to reinforce its anchoring / grip;
• the second layer is dried by ultraviolet radiation
• said chemical compound is in an aqueous base
• drying is carried out without alteration or chemical modification of said organic chemical compound, by drying in hot air of the aqueous base;
• said coating is printed on said face in the form of a mixture of said ultraviolet-radiation curable polish and of said organic chemical compound incorporating fluorine atoms in the form of at least one perfluoro-polyether group, in a solvent base compatible with the matrix of said varnish with which it is mixed, in a functionalized form that is to say able to interact with the latter by forming chemical bonds to strengthen its anchoring / hooking;
• said coating incorporates at least one bactericidal and / or antifungal and / or antiviral agent
• FIG. 1 is a top view, partial and schematic, of a bank note before implementation of the method
• FIG. 2 is a simplified sectional view, along the plane II-II of FIG. 1, of the banknote obtained according to a first step of the method according to the invention;
• FIG. 3 is also a simplified view, in section on the same plane, of the bank note obtained after the implementation of the second step of the method according to the invention.
• Figure 4 is a view similar to that of Figure 1, the ticket further having a F-shaped pattern made of gloss varnish;
• FIG. 5 is similar to FIG. 2 of the embodiment of FIG. 4;
• FIG. 6 is similar to FIG. 3 of the embodiment of FIG. 4.
• varnish is meant varnishes with infra-red drying / hot air and varnishes with UV drying.
• it is acrylic varnish aqueous base for the first, and epoxy or acrylate-based varnish and solvents for the second.
• An IR / hot air drying varnish is for example that of the Sicpa company such as Sicpaprotect 803688W (acrylic polymer).
• UV curing varnish it is possible, for example, to use the following:
• Sicpapotect 889354 based on monomers of the family of cycloaliphatic epoxides such as "Chissonox 221 Monomer” and which polymerizes to give a polyepoxide matrix by means of initiators such as onium salts (ex: cation substituted sulfonium and its anion) activated under UV.
• initiators such as onium salts (ex: cation substituted sulfonium and its anion) activated under UV.
• Schmidt Rhyner polymerizes under UV (radical mechanism) by giving a polyacrylate matrix from acrylate compounds such as, in addition, trymethylolpropane triacrylate.
• the "Actega terraGloss UV Special Coating VP-HB 100-080" varnish also polymerizes by giving a polyacrylate matrix from, among others, unsaturated acrylic resin.
• printing consisting of a pattern is meant any printed element, whatever the ink used, which forms any figure, for example in the form of a flat surface or not, this figure may in particular be inter alia a character. alphanumeric.
• Figure 1 is shown very schematically a document 1, in this case a bank note consisting of a support 2 paper or cotton fibers, for example, whose opposite upper and lower faces are referenced 20 and 21.
• patterns 3 which here respectively consist, in the value of the note (here 100), a guilloche and a portrait.
• This pattern may have been printed using a so-called security ink.
• Figure 2 and the following are given for illustrative purposes only, so that the proportions, especially in thickness, do not reflect the reality. Furthermore, only the face 20 is coated with a varnish for explanation and not to unnecessarily burden the figures. Of course, in reality and for optimal protection, the two opposite faces 20 and 21 are coated.
• This varnish layer was printed according to the following operating conditions and described above (varnish with reference SicpaProtect 889354 printed in flexography, with anilox of 6 / 6.5 cm 3 (ie approximately 2 g / m 2 transferred) and dried under UV lamps HONLE mercury spectrum 200 W / cm at 65% of their power).
• an additional layer consisting of an organic chemical compound incorporating fluorine atoms in the form of at least one PFPE perfluoro-polyether group is flexo printed with anilox identical to those described above on layer 4. or at least one of its derivatives in an aqueous base version.
• the two layers 4 and 5 then form a coating R.
• the drying of the layer 5 is carried out by evaporation under an infrared / hot air GRAFIX lamp at 150 ° C.
• said drying consists of ultraviolet radiation drying of the same type as that mentioned above, especially when the organic chemical compound incorporating fluorine atoms in the form of at least one PFPE group and compatible with drying under UV radiation, is mixed directly with said varnish.
• the varnish and the organic chemical compound incorporating fluorine atoms are printed in the form of a single layer.
• the non-stick properties of the R coating reduce the chances of interacting with and catching living microscopic pathogens such as bacteria and fungi, thereby inhibiting their proliferation.
• biocidal agents be inserted in the dopant state in the layer 5 in order not to oppose a "passive" protection to the pathogenic aggressions as mentioned above, but a protection " active "as is possible for example with silver ions [see N. Stobie et al. : Silver Doped Perfluoropolyether-Urethane Coatings: Antibacterial Activity and Surface Analysis. Colloids and Surfaces B: Biointerfaces Vol 72,1 (2009), pp 62-67].
• the soil resistance was tested according to the dry soil test (Fritsch). It is a vibrating apparatus where small glass beads are spread and incrust on a test piece of paper a messy composition based on sand, peat, activated carbon, flour, and mono-oleate glycerin (fat present in sebum). The test lasts 1 to 5 minutes. As stated above, the luminance of an initially white area is measured several times before and after exposure to the messy composition. The gap obtained or AL, allows to characterize the grip of the stain on the bill: the smaller it is, the better is the resistance to dry dirt.
• Hydrophobicity is characterized as resistance to the penetration of water but also its ability to repel the latter surface called water repellency. Resistance to water penetration is therefore measured using the Cobb test (60 s). This is the amount of water absorbed by the support in g / m 2 by means of a cylindrical impregnating jig during a period of 60 seconds. This is an otherwise common test in the paper industry to characterize paper absorption. There is also a Cobb at 300 seconds, this allows to see if the effect of the layer is still present after a longer period of exposure under water.
• the water repellency As for the water repellency, it is the natural propensity of the paper to make the water flow in the form of drops on the surface of a paper, by simple "gravity" when the substrate is inclined. This is a visual order that has been correlated with contact angle measurements ( ⁇ ) of a droplet of water at 500 is (from which surface tension values are also derived). ). It is indeed at this moment that one can consider that this drop is stabilized on the surface of the paper. Oleophobia is measured by fat exposure tests. A first method called “Kit Test” implements a mixture of castor oil (fats) and high boiling solvents, namely toluene (aromatic solvent) and n-heptane (aliphatic solvent).
• composition whose viscosity and surface vary inversely with its aggressiveness, that is to say, its capacity of impregnation.
• a composition rich in castor oil is at the bottom of the scale, while a composition rich in heavy solvents is at the top of the scale.
• fatty acid test Another test has been implemented, this is the fatty acid test (GA).
• the principle is the same as previously mentioned but the composition is a mixture of fatty acids, one of which is present in sebum. It is a mixture in different proportions of castor oil (heavy fraction), oleic acid (intermediate fraction) and octanoic acid (light fraction) with decreasing viscosities.
• the test is carried out at 20 ° C. and at 60 ° C.
• compositions to be tested There are 11 compositions to be tested and the results are also expressed in the form of visual notation.

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• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Business, Economics & Management (AREA)
• Accounting & Taxation (AREA)
• Finance (AREA)
• Physics & Mathematics (AREA)
• Engineering & Computer Science (AREA)
• Electromagnetism (AREA)
• Mechanical Engineering (AREA)
• Plasma & Fusion (AREA)
• Paints Or Removers (AREA)
• Printing Methods (AREA)
• Paper (AREA)
• Laminated Bodies (AREA)

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Citations (8)

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• 2011
  • 2011-09-27 FR FR1158646A patent/FR2980491B1/fr active Active
• 2012
  • 2012-09-26 BR BR112014007006-7A patent/BR112014007006B1/pt active IP Right Grant
  • 2012-09-26 CA CA2848934A patent/CA2848934C/fr active Active
  • 2012-09-26 WO PCT/EP2012/068968 patent/WO2013045496A1/fr active Application Filing
  • 2012-09-26 PL PL12762308.0T patent/PL2761084T3/pl unknown
  • 2012-09-26 AU AU2012314478A patent/AU2012314478B2/en active Active
  • 2012-09-26 RU RU2014116902A patent/RU2611503C2/ru active
  • 2012-09-26 CN CN201280047451.XA patent/CN103998685A/zh active Pending
  • 2012-09-26 EP EP12762308.0A patent/EP2761084B1/de not_active Revoked
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• 2014
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