CN103998685A - Method for treating the surface of a banknote - Google Patents

Method for treating the surface of a banknote Download PDF

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Publication number
CN103998685A
CN103998685A CN201280047451.XA CN201280047451A CN103998685A CN 103998685 A CN103998685 A CN 103998685A CN 201280047451 A CN201280047451 A CN 201280047451A CN 103998685 A CN103998685 A CN 103998685A
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CN
China
Prior art keywords
varnish
coating
organic compound
incorporated
matrix
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.)
Pending
Application number
CN201280047451.XA
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Chinese (zh)
Inventor
X·博尔德
纪尧姆·沙波
J·吉洛特
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Oberthur Fiduciaire SAS
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Oberthur Fiduciaire SAS
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Application filed by Oberthur Fiduciaire SAS filed Critical Oberthur Fiduciaire SAS
Publication of CN103998685A publication Critical patent/CN103998685A/en
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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
    • 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
    • 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
    • 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
    • D21H19/16—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
    • D21H19/20—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
    • 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
    • D21H21/18—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
    • 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

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

Abstract

The present invention relates to a method for treating the surface of a banknote (1) comprising, on at least one of its opposing surfaces (20, 21), at least a printed item comprised of at least a design (3), this surface (20, 21) and its associated printed item (3) being covered in a transparent protective coating (R), characterized by the fact that a coating is applied via printing, said coating containing a varnish and an organic chemical compound incorporating fluorine atoms in the form of at least a perfluoro-polyether (PFPE) group, on said surface (20, 21), and by the fact that it is dried.

Description

Surperficial method for the treatment of banknote
Technical field
Since banknote, be called as bank note at first just accompanied with us in tenth century always.This means of payment are introduced into avoid carrying metal money by Chinese tea business.In 1803, France for the first time nominally issued bill first.From the beginning, bank note is made by cotton.But after 30 years, because the developer of polymer finds that polymer has more patience, so cotton-wadded quilt polymer replaces.No matter the substrate of bill is made by cotton or polymer, and manufacture and the birth process thereof of bill remain unchanged.
Background technology
Continuous printing process and security process (for example, dry offset, wet offset printing, intaglio printing, aniline printing, serigraphy or or even drop stamping) produce the manufactured goods with high added value.
Crucial, the ILS of this bill is worn and torn to prevent it too soon.
If object is the life-span that increases these valuable printed items, basic is to understand the reason that causes banknote to be retracted.
In essence, the manufacture complexity of bill is the necessary condition that stops personation attempt.
By adopting the security of the varying level of several type effectively to be stoped.
The security element of the first level for not needing to use special device, the element that bore hole just can detect under daylight or artificial light.
The sense of touch embossment that the element of the watermark existing, colored fiber, visible perspective or the project (item) of printing by intaglio printing produce is the example of the element of the first level.
The element that the safety measure that is called as the second level for example, can detect for go up the means of appropriate equipment (UV lamp or IR lamp) by science and technology.This just makes various tissues (shop, bank center etc.) checking bill.Pattern or word can be printed in invisible printing ink distinctively, but this pattern or word are visible under ultra-violet radiation or infra-red radiation, fluorescent fiber, magnet-wire etc.
Finally, the superior device of the security needs of the 3rd level and therefore need the input of substantial contribution.This is mainly these security features that the Central Bank checks, the tracer for example existing in bill.
Must guarantee the effect of these security features, and along with the time correctly one of the condition of verifying banknote be the aging of bill self.If the bill being sent back to can identification be at least 50%(various factors: pollute, tear, incompleteness ...), any bill that this is sent back to of the obligated replacing of the Central Bank.Therefore, basic is that it can identify and be controlled at a plurality of elements that form on bill.
The Central Bank demonstrates increasing interest to the bill of long wearing (that is to say anti-mechanicalness and anti-chemistry) more.
In which, more clean, much cleaner and there is the banknote in the service life of prolongation and can be put in the circulation with lower life cycle cost.
Yet, in order to produce this product, it must be understood that, what really jeopardizes bill and causes them from circulation, to exit.
The Central Bank has carried out the possible factor that some research is exited to characterize bill.At (DE HEIJ Hans.Durable Banknotes:an overview.In:Presentation of the BPC/Paper Committee to the BPC, May2002, Prague.) in, enumerated various factors, a factor different from other factor is: pollute.
Pollution account for make banknote from circulation the reason that exits 60% to 80%.One of basic element of this pollution comprises that nature exists mankind's sebum, the fatty material at skin surface.
For this reason, manufacturer, and particularly paper manufacturer for example attempts, and adopts the scheme such as high-durability paper or nonpolluting coating.These schemes have been strengthened respectively anti-mechanicalness and the anti-chemistry of bill.
Therefore, paper manufacturer has proposed different combinations.Change between the coating/dipping " sauce " of these fiber mats that do not coexist (mixture of the mixture of 100% cotton, natural fabric, natural fabric and synthetic fiber, polymer etc.) and use.
For example, be different from those cotton natural fabrics and can be flax or hemp, synthetic fiber are based on polyethylene, polypropylene.This supporter even can only comprise Biaxially oriented polypropylene.
For nonpolluting coating, it for example can be the sauce based on polyurethane or latex.The example of these nonpolluting coatings is according to different suppliers, has the various high-durability paper of specific features separately, certainly example not exhaustive.
Yet from finally, the final performance of giving these paper is relaxed.In fact, some paper have obtained anti-mechanicalness and other paper has improved antifouling property, but these supporters must retain indivisible characteristic-impressionability.
Except their higher cost, these novel paper also have other weakness.Processing below experience during the manufacture of paper: if the life-span of supporter increases, this just can not guarantee the protection of item security of the printing of the above-mentioned basic sides of mentioning.
File WO02/051638 describes a kind of technology, and this technology comprises that utilize aniline printing is supporter japanning in completing the manufacture process of bill.This varnish of cover India and China application improves the resistance tocrocking of bill, and the full content of protection printed items.For the single printing without reversion, two faces of bill are simultaneously protected in order to avoid contaminated, that is to say, avoid the ink of deposition and the pollution of supporter.For example, follow this varnish that UV is dry a kind of for what Sicpa proposed in list of references SicpaProtect889354 and 889405.Other lists of references are also applicable to the present invention, the varnish that the varnish of mentioning such as Schmidt Rhyner WESSCO Protector36.298.42 and Actega TerraGloss UV Special Coating VP-HB100-080 mention.
Contamination measurement (below will describe the method for operating of this Contamination measurement) is characterized as being the sample having polluted in the part of non-printing and the poor L of brightness measurement between untainted sample.Therefore,, when carrying out this test, the white kraft of being made by 100% cotton has the approximately Δ L of 20～30Ge unit, has 6/6.5cm 3the aniline printing of anilox roll (or shift about 2g/m 2) printing with reference to the identical paper varnish of SicpaProtect889354, its Δ L is between 14 and 18, or approximately 40% gain (gain).
This result itself is appreciable, but unfortunately, hydrophobicity and the oleophobic property of this paper varnish with reference to SicpaProtect889354 are quite low.
In addition, be known that in packaging for foodstuff field, at least until the product in being comprised in packing while being consumed, needing protection, it avoids the erosion of fruit juice, sauce and other fat.
For example, Solvay company has proposed a kind of product based on fluorine, and the anti-adhesive of this product is also well-known.Several lists of references demonstrate hydrophobic and preferred performance oleophobic, particularly based on PFPE (PFPE, X-[-(CF 2-CF 2-O) m-(CF 2o) n-]-X) and two kinds of aqueous dispersions.The first product (with reference to FOMBLIN or 5134X) contains PFPE type polyurethane, and another kind of product (with reference to 5135X) contains PFPE type ammonium phosphate salt.Based on PFPE-polyurethane and contain organic solvent another with reference to being functionalized, that is to say, substrate molecule also contains reactive chemical functional group.Therefore it can mix mutually with the matrix of aggretion type varnish under UV radiation, and can form chemical bond with the latter and react to strengthen its bonding/absorption.These products are produced for responding PFOA(perfluoro caprylic acid) and PFOS(perfluoro octane sulfonate) relevant health and environmental problem.The aforementioned product based on PFPE does not contain PFOA and does not contain PFOS or their catabolite yet.
These products are given the good barrier property to oil & fat on Paper or cardboard supporter.They are all used as the applicable surface treatment of the coating procedure of aniline printing, rotogravure printing or any other standard.
Surface deposition produces a kind of stealthy chemical barrier of PFPE.These for example, with reference to being used at present in food packaging industry (, for animal food bag, pizza box).In addition, from the approval with Food Contact, prove that theirs is harmless.
Summary of the invention
Therefore, the applicant proposes with respect to the be commissioned varnish of use of the process of all character (especially resistance tocrocking, hydrophobicity, oleophobic property) of strengthening affect the life-span of bill, the deficiency of reference before improving, thereby reduce the delay of macroscopical contamination particle, and, due to quantifiable screen effect, repel from the water of sweat and the fat of sebum.
Therefore, the present invention relates to a kind of surface-treated method of banknote, described banknote at least comprises at least one printed items being comprised of at least one style in its contrary face, this face and the printed items being associated thereof are coated in transparent protective coating, it is characterized in that, coating is applied on described via printing, described coating contains varnish and is incorporated to the organic compound of the fluorine atom of at least one perfluoropolyether group (PFPE) form, and be characterised in that, carry out the dry of described coating;
Use this technology can produce following result/advantage/feature:
-valuable whole printed items (namely, supporter and printed items thereof) is protected;
-resistance tocrocking is more effective than current lackering method;
-hydrophobicity is more effective than current lackering method;
-oleophobic property is more effective than the lackering method of the current standard of describing in this document;
Can't there is the infringement of economic aspect in the improvement of-above-mentioned performance, and do not use substantially or the physically complicated process of the manufacturing cost of even intolerable increase bill;
-processing is compatible with the printing technology of standard, that is to say, itself can be printed this coating;
-this processing can be applied in by the printing process of aniline printing, rotogravure printing or serigraphy;
Once-secure file is manufactured and its coating is done, process to contact compatibility with epidermis and without known toxicity or anaphylaxis.
According to other advantage of the method and non-limiting feature:
-described coating is printed on described with the form of two different layers, particularly, first being the ground floor of varnish, is then the second layer of organic compound that is incorporated to the fluorine atom of at least one perfluoropolyether group form described in containing in water-based matrix or solvent substrate;
-under ultra-violet radiation, carry out the dry of described varnish;
-described in be incorporated at least one perfluoropolyether group the organic compound of fluorine atom of form in solvent substrate, the matrix that the described solvent substrate of energy is blended in described varnish wherein with functionalized form and described varnish is compatible mutually, that is to say, described solvent substrate can form chemical bond with the matrix of described varnish and react to each other to strengthen its bonding/absorption;
Being dried under the ultra-violet radiation of-described second layer carried out;
-described compound is in water-based matrix;
-described be dried in the situation that not changing described in described organic compound or not chemical modification organic compound under, in water-based matrix, undertaken by being dried under hot-air;
-described coating under ultra-violet radiation with aggretion type varnish and described in be incorporated to the form of at least one perfluoropolyether group the form of mixture of organic compound of fluorine atom be printed on described, the matrix that described solvent substrate is blended in described varnish wherein with functionalized form and described varnish is compatible mutually, that is to say, described solvent substrate can form chemical bond with the matrix of described varnish and react to each other to strengthen its bonding/absorption;
Being dried under ultra-violet radiation of-described mixture carried out;
-described coating has been incorporated at least one sterilization and/or antimycotic and/or antiviral preparation;
-described preparation is incorporated in the described second layer.
Accompanying drawing explanation
By demonstrating other features and advantages of the present invention below in conjunction with the description of the drawings, wherein:
Fig. 1 is for before completing the method, banknote local and schematically plane;
Fig. 2 be the banknote that obtains of the first step of the method according to this invention according to the reduced graph in the cross section of Planar Mechanism-II of Fig. 1;
Fig. 3 be the banknote that obtains after the second step of the method according to this invention according to the reduced graph in the cross section of identical plane;
Fig. 4 is the view similar to Fig. 1, and this bill also has the style of the F form of being made by polish lacquer;
Fig. 5 is the embodiment view similar to Fig. 2 of Fig. 4;
Fig. 6 is the embodiment view similar to Fig. 3 of Fig. 4.
The specific embodiment
Term " varnish " refers to varnish and varnish and the dry varnish of UV of infra-red drying/heated-air drying.
Preferably, the first is the acrylic lacquer in water-based matrix, and the second is the varnish based on epoxides or acrylate and solvent.
For example, the varnish of infrared/heated air drying varnish Wei Gai Sicpa company, such as Sicpaprotect803688W(acrylate copolymer).
For the dry varnish of UV, for example, can use the Sicpapotect889354 based on cycloaliphatic epoxides (such as Chissonox221 monomer) family's monomer, it makes the polymerization of polyepoxide matrix by for example, the mode such as salt primer (, the sulfonium cation of replacement and anion thereof) activating under UV.
Other varnish, such as " the Wessco Protector36.298.42 " of Schmidt Rhyner under UV (free radical mechanism) by producing polyacrylic acid matrix and polymerization from acrylate compounds, such as three acrylic acid trihydroxy methyl propyl ester (trymethylolpropane tryacrylate) especially.
Varnish " Actega terraGloss UV Special Coating VP-HB100-080 " is also by producing polyacrylic acid matrix and polymerization from especially unsaturated acrylic resin.
" printed items being comprised of style " refers to and do not consider any printing element of the ink using, and it forms any pattern, for example, with the form of square, hollow out or non-hollow out, alphanumeric symbol especially particularly wherein.
Fig. 1 schematically shows document 1, and in this case, banknote comprises the supporter 2 of being made by for example paper or cotton fiber, wherein contrary above and be marked as 20 and 21 below.
Style 3 is printed on above 20 by any known technology of expert, and style 3 is comprised of explanation, a chain of knot and the portrait of the value (being 100 herein) of bill respectively in this article.
This style can be printed by means of being called as anti-forgery ink.
Certainly, other printed items can be presented in face 20.
Certainly, opposing face 21 also can comprise identical, similar or different printed items.
Referring now to Fig. 2, it is evident that, face 20 is coated in the layer of the colourless varnish 4 that has provided restriction above.
Certainly, only in the mode of example, provided Fig. 2 and below, so ratio, particularly thickness representation faithfulness not.In addition,, as illustrating and not making this figure complicated, only face 20 is coated in varnish.Certainly, in reality and in view of under optimized protection, two contrary faces 20 and 21 are coated.
According to following operating condition with above describe, the layer of varnish is printed that (varnish by aniline printing printing with reference to SicpaProtect889354, this aniline printing has 6/6.5cm 3anilox roll (or shift about 2g/m 2), and in ultraviolet dry with its power of 65% under lamp hg spectrum 200W/cm.
After dry, aniline printing is to utilize with above-described identical anilox roll to carry out at layer 4 and other layers 5, and layer 5 is included in the organic compound of the fluorine atom of the form that is incorporated at least one perfluoropolyether group (PFPE) or at least one derivative in water-based matrix version.After drying layer 5, by layer 4 and layer 5 form coating R.
At 150 ℃, by being evaporated the dry of stratification 5 under infrared/hot-air lamp GRAFIX.
In different embodiment, particularly when being incorporated to the fluorine atom of at least one group PFPE form and dry compatible organic compound directly mixes with described varnish under UV radiation, the described dry composition that is dried the ultra-violet radiation of same type by mentioned earlier.
The embodiment of Fig. 4 to Fig. 6 is to aforementioned similar.In fact, according to French Patent (FRP), disclose 2958209, difference is only that the style 31 of " F " form is printed as the bright outward appearance district in sub-light background or is enclosed in sub-light background.
According to modification (not shown), varnish and the organic compound that is incorporated to fluorine atom are printed on one and only have in the form of one deck.
The anti-adhesive properties of coating R has reduced interactional possibility and microcosmic pathogen (such as bacterium and the fungi) absorption of living, and even can hinder its propagation.
In addition, what also may imagine is, killing biologic product is introduced in layer 5 with dopant states, thereby the no longer invasion of " passive " protection opposing pathogen as above, but be possible with silver ion " initiatively " protection, such as (with reference to people such as N.Stobie: Silver Doped Perfluoropolyether-Urethane Coatings:Antibacterial Activity and Surface Analysis.Colloids and Surfaces B:Biointerfaces Vol72,1 (2009), pp62-67).
The importance that coating R is applied to initiatively protection is apparent, because completing of coating R is in the final print steps of bill, only before its Final Format.This and EP03740577(ARJOWIIGGINS) in the scheme that proposes contrary, in EP03740577, described only by protection, support only have the protection of a pair of bactericide to supporter, and dumbly through printing-ink (offset printing, gravure, silk-screen ...) antagonism screen effect and kill " paillon foil " (polyester belt) in the true effect of biological treatment.
Carried out observing the work of these printed items on the impact of banknote.
Resistance tocrocking is tested according to dry test for contamination (Fritsch).This is a vibrating device, and wherein, ballotini disperses and inlays in the test pieces of similar paper, pollutes composition based on sand, peat, active carbon, flour, and glycerin mono-fatty acid ester (fat existing in sebum).Test continues 15 minutes.As previously mentioned, initial white portion be exposed to pollute composition before and afterwards, measure the brightness of initial white portion for several times.The decentralization or the Δ L that obtain have characterized the absorption of polluting on bill: it is less, and the dry resistance of polluting is just better.
Hydrophobicity is characterized as being the resistance to water infiltration, but is also the ability that resists lip-deep water, is also referred to as repellency.Therefore, rely on Cobb test (60s) to measure the resistance to water infiltration.It is by the amount (g/m of the cylindrical shape dipping former board test water that supporter absorbs in the time period of 60 seconds 2).This test for being usually used for characterizing the test of the trap of whole in paper manufacture field.Also have a Cobb test under 300 seconds, it shows in water, after long exposure, whether still to have the effect of this layer.
For repellency, its propensity that is paper, in order to guarantee when substrate is tilted, makes water be discharged from the surface of paper with the form of drop by simple " gravity ".This is the test of " Visual Order ", the measured value relevant (therefrom also deriving capillary value) of its contact angle (θ) of the drop of water during to 500 μ s.In fact, at the moment, can recognize in order that this drop is stable on the surface of this paper.
By being exposed to fatty test, measure oleophobic property.The first method that is called as " kit test " adopts the mixture of castor oil (fat) and high boiling solvent, particularly toluene (aromatic solvent) and normal heptane (aliphatic solvent).
As the function of the different proportion of the said goods, generate composition, the viscosity of said composition and surface tension and its aggressiveness (namely, its dipping ability) are inversely proportional to.
Be rich in the composition of castor oil in the bottom of scale, and the composition that is rich in heavy solvent is the top at same scale.
There are 12 kinds of compositions, and be clear that, more than 6 or equal 6 label table and understand the gratifying barrier to fat.Evaluation visually completes.
Also adopted another test, and aliphatic acid test (AG) is paid close attention in this test.Its principle is with aforementioned mentioned identical, but said composition is the mixture of aliphatic acid, and a kind of being present in sebum in aliphatic acid.Said composition is the mixture of the different proportion of the castor oil (heavy distillat) that declines gradually of viscosity, oleic acid (midbarrel) and sad (light fraction).This test is to carry out at 20 ℃ and 60 ℃.
Exist 11 kinds of compositions to test, and its result also represent with the form of visual indicia method.Higher in scale, larger to fatty barrier effect, it,, corresponding to the ratio that reduces castor oil in composition, then increases drop in oleic acid, and finally increase sad.
Following table has been listed the test result for valuable printed items, and wherein, supporter is brown paper 100% cotton, uses varnish SICPAPROTECT889354 at 6/6.5cm 3the upper printing in surface (final pass) via aniline printing of anilox roll (front/reverse side), and dry with its power of 65% under lamp hg spectrum 200W/cm, then with the baking oven that is equipped with infrared/hot-air lamp GRAFIX, at 150 ℃, use heated air drying SOLVAY5134X water-based matrix.
Things turn out contrary to one's wishes, and only with 5134X, processing unique result that cotton bank-note paper obtains is unsafty (in Table 1).Therefore, unexpectedly, Contamination measurement is also good during only by SICPAPROTECT889354 japanning unlike supporter, and if hydrophobicity is good, oleophobic property is so insignificant.
Also confirmed that undressed paper does not have preferred performance, and for the paper of japanning only, if verified this only the paper of japanning there is antifouling character, so this only the paper of japanning only slightly there is hydrophobicity and do not there is oleophobic property.
By contrast, the combination of varnish and the processing based on fluorinated product has produced beyond thought effect.By varnish and product 5134X combination having been obtained with this order to the synergy (table 2) of truth function.Therefore, observed significant antifouling gain and had hydrophobicity and oleophobic property, and being not each simple superposition that forms attached character.
On sample before, carry out durability test, and this test has proved at polar solvent (ethanol, acetone, diethylene glycol), non-polar solven (dimethylbenzene, gasoline), the test of chlorinated solvent (tetrachloro-ethylene) dipping exceeded after 30 minutes, coating R still retains being diluted in acid (acetic acid with 5%, hydrochloric acid, sulfuric acid) synthetic sweat in, with the 5% synthetic sweat being diluted in soda, with 5%, be diluted in oxidant (clorox, hydrogen peroxide) the synthetic sweat in, synthetic sweat in hot water in (100 ℃), at industrial detergent (St Marc, the protection of the synthetic sweat Persil).In addition, at light resistance test (48h in Suntest), be exposed to heat (120 ℃, 30min) and after water creped, this coating R retains these characteristics.Finally, after Fritsch Contamination measurement, hydrophobicity and oleophobic property are retained as previously mentioned.
Unshowned other results show that it can improve the value that these gain to obtain the resistance tocrocking of Δ L≤5 herein, total repellency of contact angle θ >=110 °, kit test badge >=7 and based on be deposited on amount between varnish and product 5134X than AG test badge >=5.Also can be described as, for example crown type (corona type) surface preparation before the dry varnish of UV or before the second varnish of the dry water-based matrix that contains product 5134X all produces active influence by the result to illustrating above.
With other Solvay products of mentioning, carry out performance test above, and it will cause quite similarly protection effect.
Table 1
* 1 does not repel water, absorb rapidly; 2 weak repellency, absorb; 3 total repellency, without absorbing;
* is at 20 ℃
* * represents that the document is by twice intaglio printing, once in front, and for the second time at reverse side.
Table 2

Claims (9)

1. a surperficial method of processing banknote (1), described banknote (1) is included at least one printed items being comprised of at least one style (3) at least one in its contrary face (20,21), this face (20,21) and the printed items (3) being associated thereof are coated in transparent protective coating (R), it is characterized in that: it is upper that coating is applied to described (20,21) via printing, described coating contains varnish and is incorporated to the organic compound of the fluorine atom of at least one perfluoropolyether group (PFPE) form; And carry out the dry of described coating.
2. method according to claim 1, it is characterized in that, described coating (R) is printed on described with the form of two different layers, particularly, first being the ground floor of varnish (4), is then the second layer (5) of organic compound that is incorporated to the fluorine atom of at least one perfluoropolyether group (PFPE) form described in containing in water-based matrix or solvent substrate.
3. method according to claim 2, is characterized in that, being dried under ultra-violet radiation of described varnish carried out.
4. according to the method in claim 2 or 3, wherein, the organic compound of the described fluorine atom that is incorporated at least one perfluoropolyether group (PFPE) form is in solvent substrate, the matrix that described solvent substrate is blended in described varnish wherein with functionalized form and described varnish is compatible mutually, that is to say, described solvent substrate can form chemical bond with the matrix of described varnish and react to each other to strengthen its bonding/absorption, it is characterized in that, being dried under ultra-violet radiation of the described second layer (5) carried out.
5. according to the method in claim 2 or 3, wherein, described compound, in water-based matrix, is characterized in that, described be dried in the situation that not changing described in described organic compound or not chemical modification organic compound undertaken by being dried under hot-air.
6. method according to claim 1, it is characterized in that, described coating (R) under ultra-violet radiation with described aggretion type varnish and in solvent substrate described in be incorporated to the fluorine atom of at least one perfluoropolyether group (PFPE) form the form of mixture of organic compound be printed on described, the matrix that described solvent substrate is blended in described varnish wherein with functionalized form and described varnish is compatible mutually, that is to say, described solvent substrate can form chemical bond with the matrix of described varnish and react to each other to strengthen its bonding/absorption.
7. method according to claim 6, is characterized in that, being dried under ultra-violet radiation of described mixture carried out.
8. according to method in any one of the preceding claims wherein, it is characterized in that, described coating (R) has been incorporated at least one sterilization and/or antimycotic and/or antiviral preparation.
According to claim 2 and 8 in conjunction with described method, it is characterized in that, described preparation is incorporated in the described second layer (5).
CN201280047451.XA 2011-09-27 2012-09-26 Method for treating the surface of a banknote Pending CN103998685A (en)

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