EP3879031B1 - Revêtement repoussant la saleté et les graisses pour papiers fiduciaires et procédé de fabrication - Google Patents

Revêtement repoussant la saleté et les graisses pour papiers fiduciaires et procédé de fabrication Download PDF

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Publication number
EP3879031B1
EP3879031B1 EP18939532.0A EP18939532A EP3879031B1 EP 3879031 B1 EP3879031 B1 EP 3879031B1 EP 18939532 A EP18939532 A EP 18939532A EP 3879031 B1 EP3879031 B1 EP 3879031B1
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EP
European Patent Office
Prior art keywords
coating
dirt
grease resistant
absolutely dry
filler
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
EP18939532.0A
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German (de)
English (en)
Other versions
EP3879031A1 (fr
EP3879031A4 (fr
EP3879031C0 (fr
Inventor
Pavlo Petrovych KOHUT
Yuri Grygorovych SIDORENKO
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.)
National Security Ventures Fze
Original Assignee
National Security Ventures Fze
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
Priority claimed from UAU201811013U external-priority patent/UA132546U/uk
Priority claimed from UAU201811012U external-priority patent/UA132545U/uk
Application filed by National Security Ventures Fze filed Critical National Security Ventures Fze
Publication of EP3879031A1 publication Critical patent/EP3879031A1/fr
Publication of EP3879031A4 publication Critical patent/EP3879031A4/fr
Application granted granted Critical
Publication of EP3879031C0 publication Critical patent/EP3879031C0/fr
Publication of EP3879031B1 publication Critical patent/EP3879031B1/fr
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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
    • 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
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • 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
    • 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
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • 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
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • D21H19/62—Macromolecular organic compounds or oligomers thereof 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
    • D21H21/16—Sizing or water-repelling 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

  • the present inventions relate to a dirt and grease resistant coating for paper intended primarily for the production of banknotes and to a method for manufacturing of such coating.
  • banknote circulation time is an important indicator that is taken into account by countries' central banks when planning the emissions.
  • One of the ways to reduce the costs associated with providing countries with the necessary banknote supply is to increase the banknote circulation time.
  • a banknote should not only be in circulation, but also retain its appearance, so that its quality meets a certain standard, i.e. conforms to a set of characteristics such as wear resistance, soiling resistance, color retention, ease of recognition, resistance to counterfeiting, etc. Banknotes pass through many hands and therefore they have to possess sufficient strength, withstand dust, grease and soiling, humid and dry environments and should be resistant to heat, frost and mist.
  • Contaminants include dry dust and pigment dirt, soot, clay, mineral pigments, water suspensions of various mineral and/or organic substances, sweat-and-grease and oil contaminants. These are the liquid types of contaminants, which deeply permeate the structure of paper and become firmly fixed within the fibers mass, while changing their natural color. Therefore, liquid types of contaminants have the maximum negative effect on the condition and lifespan of banknotes. Particularly dangerous are fat-containing substances, possessing high penetrating and adhesion power and containing bound moisture. Combined with the nutrients of the paper structure (pulp), this moisture becomes a favorable environment for the growth of pathogenic bacteria, which may potentially get from a banknote into a human body. That is, banknotes can be biologically unsafe for humans.
  • the closest analogue of the coating according to the present invention is a dirt and grease resistant coating for banknote paper that contains a fibrous base and a filler [ EP1783273 (A1 ), IPC (2006.01) D21H21/40; D21H19/82; Publication date: 09.05.2007, Patentblatt: 2007/19].
  • the above disclosure pertains to a coating for banknote paper, such coating comprising a fluorinated resin.
  • the described dirt and grease resistant coating for banknote paper does not sufficiently resist the negative factors affecting banknotes, since the use of compositions with compounds selected from the group of fluorine-containing cationic substances facilitates adhesion of anionic contaminants, thus significantly reducing the effectiveness of the dirt and grease resistant coating.
  • the closest prior art of the method according to the present invention is a method for manufacture of dirt and grease resistant coating for banknote paper with a fibrous base, said method including the preparation of a liquid composition with a polyurethane-containing binder polymer and subsequent forming of banknote paper coating from the liquid composition obtained in such a manner [ EP1783273 (A1 ), IPC (2006.01) D21H21/40; D21H19/82; Publication date: 09.05.2007, Patentblatt: 2007/19].
  • the above mentioned document claims a method for manufacture of a coating containing fluorinated resin for banknote paper with a fibrous base.
  • the coating produced in accordance with the above method does not sufficiently resist contaminants and negative factors affecting banknotes, since the use of a composition with compounds selected from the group of fluorine-containing cationic substances facilitates adhesion of anionic contaminants, thus significantly reducing the effectiveness of the dirt and grease resistant coating.
  • unbalanced share of fluorinated resins in the coating material such resins possessing certain hydrophobic and oleophobic properties, negatively affects the ink trapping by the special coating and the fixation of printing inks in this structure at the stage of applying a banknote image by printing.
  • Document EP 0 815 321 B1 discloses a dirt and grease resistant coating for banknote paper.
  • the proposed inventions are aimed to create such a dirt and grease resistant coating for banknote paper with a fibrous base and such a method for its manufacturing that would make it possible to obtain a coating with enhanced dirt and grease resistance properties.
  • the problem is solved by creating conditions for the formation, in the proposed coating, of a composition capable of forming, in the binder polymer - the polyurethane film, a microporous structure possessing sufficient adhesion to printing inks and at the same time demonstrating a grease resistant effect against contaminants - the sweat and grease secretions of human hands and the everyday oil/grease soiling, including those caused by food.
  • a dirt and grease resistant coating for banknote paper containing fibrous base according to the invention comprises the ingredients as defined in claim 1.
  • a feature of the coating of the present invention is that the coating uses aliphatic or aliphatic-aromatic polyurethane as the binder polymer.
  • Another feature of the coating of the present invention is that the coating uses polyaziridine as the reticular agent.
  • the coating uses an organic filler as the filler - formaldehyde and urea condensate with reactive methylol groups.
  • Yet another feature of the coating of the present invention is that a non-ionic fluoropolymer may be used as the grease resistant substance in the coating.
  • a method for manufacturing a dirt and grease resistant coating for banknote paper with a fibrous base according to the invention is defined in claim 5.
  • the inventors have experimentally determined the optimal ratio of the ingredients that form a dirt and grease resistant coating for banknote paper.
  • binder polymer accounts for 18 to 25 wt.% of absolutely dry substance. If the amount of the binder polymer decreases below 18 wt.%, the overall decrease in paper soiling resistance properties is observed.
  • the binder polymer amounts over 25 wt.% significantly increase the prime cost of a banknote. Therefore, the optimal quantity of the binder polymer is 18 to 25 wt.% of absolutely dry substance.
  • the reticular agent quantity should not exceed 2 wt.% of absolutely dry substance, and the amount of the filler should not exceed 4 wt.% of absolutely dry substance, since experiments suggest that such higher amounts reduce the dirt and grease resistant effect of the coating against the contaminants, eg. the sweat and grease secretions of human hands and the everyday oil/grease soiling.
  • aliphatic or aliphatic-aromatic polyurethane can be used in the coating, which makes it possible to obtain a protective film that is both dry and waterproof, demonstrates a barrier effect against soiling, is sufficiently resistant to harmful mechanical and chemical effects, retains a certain elasticity and, therefore, maintains resistance to paper folding and creasing.
  • the inventors have experimentally identified the optimal filler composition for the coating. It turned out to be an organic filler, namely formaldehyde and urea condensate with reactive methylol groups as defined in claim 1 and claim 5.
  • this filler content allows to create a microporous structure in the polyurethane coating, such structure being especially favorable for the ink trapping by the surface and the fixation of the ink on this surface.
  • polyaziridine as a reticular agent in the coating comprehensively increases the resistance to external influencing factors.
  • a non-ionic fluoropolymer may be used as a grease resistant substance in the coating, said polymer imparting increased anti-soiling and strength properties to the coating, in addition to sufficient grease resistance properties. Meanwhile, the quantity of fluoropolymer in the coating is safe for human health.
  • the technical result obtained from the implementation of the present invention is the creation of conditions for the formation, in the proposed coating, of a composition aimed at forming, in the binder polymer - the polyurethane film, a microporous structure possessing sufficient adhesion to printing inks and at the same time demonstrating a grease resistant effect against contaminants - the sweat and grease secretions of human hands and the everyday oil/grease soiling, including those caused by food.
  • the proposed dirt and grease resistant coating for banknote paper with a fibrous base contains substances, which may be manufactured using presently known technological methods, means and materials. It can be used for the manufacture of banknotes and security blanks, which may be used in various sectors of economy, therefore it is possible to conclude that the proposed solutions comply with the "industrial applicability" patentability criterion.
  • sheets of base paper were made on a cylinder machine by wet processing, from water suspension containing only cotton fibers and a filler (titanium dioxide) in an amount of 3 wt.% of dry matter calculated based on total weight of fibers, and a substance increasing moisture resistance - polyamide amine epichlorohydrin resin - in an amount of 2.5 wt.% of dry matter calculated based on the total weight of fibers, and sodium carboxymethylcellulose in an amount of 0.7 wt.% of dry matter calculated based on the total weight of fibers.
  • a filler titanium dioxide
  • a layer of polyvinyl alcohol was applied to each base sheet in an amount of 4.7 wt.% of dry matter calculated based on the total weight of fibers.
  • Each obtained base sheet had a weight of 95.4 g/m 2 and a thickness of 116 ⁇ m.
  • a layer of dirt and grease resistant coating was applied to each base sheet obtained, the former containing a binder polymer, a reticular agent, a filler, a grease resistant substance, and water with a ratio of ingredients specified for each sheet.
  • a water dispersion containing the above ingredients was prepared and used to impregnate base sheets having the same ingredients as in the case of the coating manufacture of the closest prior art.
  • Aliphatic or aliphatic-aromatic polyurethane was used as the binder polymer in the coating.
  • Polyaziridine was used as a reticular agent.
  • An organic filler - formaldehyde and urea condensate with reactive methylol groups - was used as a filler.
  • a non-ionic fluoropolymer may be used as the grease resistant substance in the coating.
  • Each base sheet was immersed, on a two-shaft size press, into liquid dispersion of the coating, with which the base was impregnated; then, the excess of the dispersion was pressed out between the press shafts, and the coated paper sheet thus obtained was dried. After that, the yield of the absolutely dry substance of the coating amounted to 8.4% to 9.7% of the total weight of fibers.
  • the resulting coated paper sheet had a weight of 96.2 g/m 2 and a thickness of 110 to 114 ⁇ m.
  • the overall thickness of the proposed coating per side amounted to 2.5 to 3.8 ⁇ m.
  • Each manufactured sheet of coated paper (sample) was tested for circulation endurance, in particular for resistance to dust soiling in a dry environment, for rubbing in a humid environment, and for the grease resistance in the presence of oil and grease soiling agents, and a cumulative assessment of the coating was obtained.
  • the inventors used the known resistance and durability tests for banknotes, as well as the test for resistance to washing off. The research data are presented in the table: Table Sample No.
  • a paper base was made, where a part of the cotton fibers was replaced with flax fibers so that the share of cotton fibers amounted to 85 wt.% of dry matter, and the share of flax fibers respectively amounted to 15 wt.% of dry matter calculated based on the total weight of fibers.
  • a surface coating layer was applied to the obtained paper sheet as described above.
  • the yield of the absolutely dry substance of the coating amounted to 9.1% to 9.4% of the total weight of fibers.
  • the resulting sheet of paper had a weight of 94.8 to 95.2 g/m 2 , and a thickness of 112 to 113 ⁇ m, and its qualitative characteristics were close to the respective properties of the paper with a cotton-fiber base, but paper with flax fibers had a greater rupture strength, tear resistance, and breaking resistance under double folds.
  • the present inventions allow to obtain a coating that increases the lifespan of a banknote with a coating compared to that of a banknote with a coating obtained by the closest prior art method by about 25-30% under conditions close to those of the real world.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Business, Economics & Management (AREA)
  • Accounting & Taxation (AREA)
  • Finance (AREA)
  • Paper (AREA)
  • Paints Or Removers (AREA)

Claims (5)

  1. Revêtement résistant à la saleté et à la graisse pour papier de billets de banque contenant une base fibreuse, le revêtement comprenant les ingrédients suivants: polymère liant, agent réticulaire, charge, substance résistant à la graisse et eau avec le taux suivant des ingrédients (en % en poids):
    polymère liant - 18 à 25 de substance absolument sèche;
    agent réticulaire - 1 à 2 de substance absolument sèche;
    charge - 0,5 à 4 de substance absolument sèche;
    substance résistante à la graisse - 0,2 à 1,0 de substance absolument sèche;
    eau - quantité nécessaire pour atteindre au total 100, la charge étant une charge organique, à savoir un condensat de formaldéhyde urée avec des groupes méthylol réactifs.
  2. Revêtement résistant à la saleté et à la graisse pour papier de billets de banque selon la revendication 1, caractérisé en ce que le polymère liant utilisé dans le revêtement est un polyuréthane aliphatique ou aliphatique-aromatique.
  3. Revêtement résistant à la saleté et à la graisse pour papier de billets de banque selon la revendication 1, caractérisé en ce que l'agent réticulaire utilisé dans le revêtement est une polyaziridine.
  4. Revêtement résistant à la saleté et à la graisse pour papier de billets de banque selon la revendication 1, caractérisé en ce que la substance résistante à la graisse utilisée dans le revêtement est un fluoropolymère non ionique.
  5. Procédé pour la fabrication d'un revêtement résistant à la saleté et à la graisse pour papier de billets de banque comportant une base fibreuse, qui comprend la préparation d'une composition liquide avec un polymère liant contenant un polyuréthane et la formation subséquente d'un revêtement pour papier de billets de banque à partir de la composition liquide obtenue d'une telle manière, la composition liquide étant composée des ingrédients suivants (en % en poids):
    polymère liant - 18 à 25 de substance absolument sèche;
    agent réticulaire - 1 à 2 de substance absolument sèche;
    charge - 0,5 à 4 de substance absolument sèche;
    substance résistante à la graisse - 0,2 à 1,0, de substance absolument sèche;
    eau - quantité nécessaire pour atteindre au total 100, la charge étant une charge organique, à savoir un condensat de formaldéhyde urée avec des groupes méthylol réactifs, les ingrédients mentionnés ci-dessus étant mélangés à une température de 15 °C à 40 °C avec agitation continue dans le réacteur jusqu'à ce qu'une dispersion aqueuse homogène soit obtenue, ladite dispersion ayant une teneur totale en solides dans une plage d'environ 12 % à 32 % du poids de dispersion (préférablement d'environ 20 % à 25 %) et une valeur d'acidité neutre (pH).
EP18939532.0A 2018-11-07 2018-12-17 Revêtement repoussant la saleté et les graisses pour papiers fiduciaires et procédé de fabrication Active EP3879031B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
UAU201811013U UA132546U (uk) 2018-11-07 2018-11-07 Брудо- та жировідштовхуюче покриття для банкнотного паперу
UAU201811012U UA132545U (uk) 2018-11-07 2018-11-07 Спосіб виготовлення брудо- та жировідштовхуючого покриття для банкнотного паперу з волокнистою основою
PCT/UA2018/000134 WO2020096557A1 (fr) 2018-11-07 2018-12-17 Revêtement repoussant la saleté et les graisses pour papiers fiduciaires et procédé de fabrication

Publications (4)

Publication Number Publication Date
EP3879031A1 EP3879031A1 (fr) 2021-09-15
EP3879031A4 EP3879031A4 (fr) 2022-09-14
EP3879031C0 EP3879031C0 (fr) 2023-11-29
EP3879031B1 true EP3879031B1 (fr) 2023-11-29

Family

ID=70610995

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18939532.0A Active EP3879031B1 (fr) 2018-11-07 2018-12-17 Revêtement repoussant la saleté et les graisses pour papiers fiduciaires et procédé de fabrication

Country Status (3)

Country Link
EP (1) EP3879031B1 (fr)
DE (1) DE212018000341U1 (fr)
WO (1) WO2020096557A1 (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996028610A1 (fr) * 1995-03-13 1996-09-19 Portals Limited Papier de securite
EP1439263B1 (fr) * 2003-01-15 2005-12-07 M-real Oyj Papier à motifs avec des caractéristiques d'impression et de légende améliorées
DE102005052672A1 (de) 2005-11-04 2007-05-10 Giesecke & Devrient Gmbh Harzimprägniertes Sicherheitspapier
ITVR20080065A1 (it) * 2008-06-10 2009-12-11 Cartiere Fedrigoni & C Spa Procedimento per il trattamento antisporco di banconote e/o di carta di sicurezza in generale
DE102009054406A1 (de) * 2009-11-24 2011-05-26 Giesecke & Devrient Gmbh Wertdokument mit Silikonharzbeschichtung und Verfahren zu seiner Herstellung
CN103061205A (zh) * 2012-12-16 2013-04-24 中冶美利浆纸有限公司 一种食品级防油卡纸的制备工艺

Also Published As

Publication number Publication date
EP3879031A1 (fr) 2021-09-15
WO2020096557A1 (fr) 2020-05-14
DE212018000341U1 (de) 2020-06-26
EP3879031A4 (fr) 2022-09-14
EP3879031C0 (fr) 2023-11-29

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