EP0860297B1 - Verfahren zur Herstellung von Banknoten - Google Patents
Verfahren zur Herstellung von Banknoten Download PDFInfo
- Publication number
- EP0860297B1 EP0860297B1 EP98102976A EP98102976A EP0860297B1 EP 0860297 B1 EP0860297 B1 EP 0860297B1 EP 98102976 A EP98102976 A EP 98102976A EP 98102976 A EP98102976 A EP 98102976A EP 0860297 B1 EP0860297 B1 EP 0860297B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- paper
- composition
- wax
- process according
- printed
- 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.)
- Revoked
Links
Classifications
-
- 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
- B41M7/0081—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using electromagnetic radiation or waves, e.g. ultraviolet radiation, electron beams
-
- 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
- B41M7/0036—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using protective coatings or layers dried without curing
-
- 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
Definitions
- This invention relates to a process for producing paper printed with ink and covered by a protective coating.
- the invention particularly relates to the production of paper currency, more particularly banknotes, and of documents and other printed paper that are intended to be subjected to intensive use over a long period of time.
- the invention also relates to the use of water-based emulsion varnishes for coating printed paper.
- coating printed paper creates the problem that the coating has to adhere to the printed parts, particularly when the printing ink contains wax.
- wax is often incorporated in printing ink to improve the rheological properties thereof and to prevent the ink from coming off onto the next sheet in a pile of freshly printed paper. Since the latter effect is due to the migration of the wax to the surface of the printed ink, care must be taken that the varnish applied thereto adheres as strongly as to the non-printed areas of the paper.
- Another required property for the protective coating is solvent resistance.
- US-A-4170681 discloses a method of applying a layer of protective varnish on a hydrophilic surface carrying at least one area of hydrophobic ink, wherein the varnish is an aqueous dispersion of a film-forming polymer which contains 0.5 - 10 % of an auxiliary film-forming material capable of raising the critical surface tension of the hydrophobic inked area.
- EP-A-543385 discloses a water-based printing ink composition, particularly suitable for gold and silver colours.
- US-A-5384160 discloses a method for depositing an aqueous coating composition on a printed surface, using viscosity and temperature controls.
- DE-A-4336214 discloses specific binder combinations that can be used directly to coat printed substrates. They contain either
- DE-A-3225875 discloses copolymers of 37-45 wt % of (meth)acrylic acid, 55-63 wt % of styrene and 0 - 10 wt % of other hydrophobic olefinically unsaturated monomers, prepared by continuous mass polymerisation at 200 - 400 °C, and their use to prepare water-based emulsion for coating paper.
- US-A-1575940 discloses paper currency, bonds or other instruments of value comprising paper printed with an ink comprising cellulose ester material and incorporated oily softening material, with a thin substantially transparent protective coating.
- the disclosed protective coating compositions are all based on thinly fluent volatile solvents for pyroxylin or cellulose ester.
- EP-B2-256170 discloses paper objects printed with ink containing 1-10 wt% of wax consisting for the greater part of particles of 0.03 mm and smaller and for a minor part of particles smaller than 0.01 mm, and coated with a protective coating consisting for a major part of cellulose ester or ether.
- Those protective coatings however require a large amount of solvent in which the cellulose ester or ether is dissolved for application to the printed paper (respectively 73 and 84 wt% in the examples).
- Another object of the invention is to provide a low-solvent composition for making coatings that adhere to the printed areas of the printed paper.
- a further object of the invention is to provide a low-solvent composition for making coatings that are solvent-resistant.
- printed paper particularly when printed with wax-containing ink, may be coated with a strongly-adhering layer of low-solvent varnish which will protect the printed paper, thereby repelling dirt and increasing the useful life of the coated printed paper.
- the process of the invention for producing paper printed with ink and covered with a protective coating is characterised by the use of a coating composition essentially consisting of:
- the binder consists of at least one essentially acrylic (co)polymer in the form of an emulsion.
- the acrylic (co)polymers may be of the air-drying type, but they should preferably be of the UV-curing type which provides more resistant coatings.
- the composition comprises from 15 to 45 wt% of acrylic (co)polymers, preferably from 20 to 30 wt%. The selection of acrylic monomers is known in the art and need not be described herein (see e.g. Surface Coatings, Vol. I, Raw materials and their usage, Chapter 17, pages 164-70, Chapman and Hall, 1983).
- the composition further comprises from 0.8 to 2.0 wt% (preferably from 1.2 to 1.6 wt%) of wax, preferably polyethylene wax.
- wax is well-known in the art and need not be described here. It is preferred to use micronised wax, as described in EP-B2-256170 and in the references cited therein.
- the acrylic (co)polymers are of the UV-curing type, the use of such a wax is neither essential nor detrimental.
- composition to be used according to the invention may further contain any and all additives that are usual for water-based coating compositions, such as for example biocides, fungicides, defoamers, emulsifiers and flow agents, or any and all agents that are usual for security or banknote paper, such as for example agents preventing chemical falsification and authentication agents.
- a particularly desirable additive is polysiloxane polyether copolymer, up to about 0.5 wt%.
- compositions to be used according to the invention are easily prepared by mixing the desired components.
- the preferred method is to put some water in a tank (preferably in a dissolver), then to add the other components ending with the acrylic emulsion(s), and finally to adjust the pH to light basic (preferably about 8.5) and the viscosity to the value required by the application method (usually to a viscosity of 15 to 30 s, preferably of 20 to 25 s, measured at 23°C according to the DIN 4 standard method).
- the protective coating according to the invention is preferably applied using roller-coating.
- the composition is applied in an amount such as to obtain a dry film weight of 1.5 to 5 g/m2, preferably of 2 to 3 g/m2, by air-drying (preferably using hot air at a temperature of 60 to 90°C, optionally combined with infra-red drying) followed where applicable by UV-curing.
- the process of the invention is particularly useful for producing paper printed with wax-containing ink and covered with a protective coating.
- the invention is particularly well adapted to the production of paper currency, more particularly banknotes, and of documents and other printed paper that are intended to be subjected to intensive use over a long period of time.
- Example 1 according to EP-B2-256170 was repeated.
- composition was applied by means of a roller coater on printed polyvinylalcohol-treated paper having a thickness of 80 g/m2, and dried using hot air (about 85°C) to form a 1.5 g/m2 dry film.
- a protective coating composition was prepared which had the following composition: (parts by weight) water 73.72 (total) acrylic copolymer 20.24 (as 49 wt% emulsion in water) polyethylene wax 1.60 additives 1.95 bases 0.77 glycols 1.72
- the composition was prepared by introducing 47 parts of water in a dissolver, adding the wax and the additives (defoamer, biocide, flow agent) then the acrylic (co)polymers.
- the main acrylic component was a commercially available anionic modified acrylic copolymer having a Tg (glass transition temperature) of 9°C and a good resistance to blocking; the emulsion had a Brookfield viscosity of 400 mPa.s at 25°C and a minimum film-forming temperature below 0°C.
- the glycols were not essential in the composition but were present in the components as commercially available.
- the bases were used to adjust the pH to about 8.5.
- composition was applied by means of a roller coater on printed polyvinylalcohol-treated paper having a thickness of 80 g/m2, and dried using hot air (about 85°C) to form a 3 g/m2 dry film.
- the resistance of the coated printed paper was evaluated according to the usual practice in the art.
- the chemical resistance was evaluated by dipping the coated printed paper in various media under set conditions (including ethyl acetate for 10 minutes at 30°C, ethanol for 20 minutes at 45°C, 4% Cl bleach water for 15 minutes at 45°C) and visually determining the chemical resistance. It was as good as that of the comparative example.
- the coated printed paper and the reference were subjected under set conditions to a proprietary composition of artificial dirt essentially consisting of sand, oil, carbon black and artificial sweat; after removal of the dirt by brushing, the paper was compared visually with the reference.
- the dirt resistance was similar.
- Example 1 was repeated using a commercially available UV-curing acrylic copolymer and 2-hydroxy 2-methyl 1-phenyl 1-propanone as photoinitiator.
- the coating composition was as follows: (parts by weight) water 73.00 (total) acrylic copolymer 24.00 (as 38 wt% emulsion in water) additives 0.66 bases 0.54 glycols 1.60 photoinitiator 0.20
- Curing of the dry film was made using a standard high pressure mercury lamp.
- the dry film had a thickness of 2 g/m2.
- the dirt resistance was similar to that of the reference while the chemical resistance was slightly better.
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- Electromagnetism (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Plasma & Fusion (AREA)
- Paper (AREA)
- Paints Or Removers (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Preparation Of Compounds By Using Micro-Organisms (AREA)
- Peptides Or Proteins (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Edible Seaweed (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
Claims (11)
- Verfahren zur Erzeugung von mit Tinte bedrucktem und mit einer dünnen Schutzschicht bedecktem Papier,
gekennzeichnet durch den Einsatz einer Streichzusammensetzung, die sich im Wesentlichen zusammensetzt aus (I) Wasser, (II) 15 bis 45 Gew.-% von wenigstens einem emulgierten Acryl(co)polymer, das ausgewählt wird aus der Gruppe bestehend aus an der Luft trocknenden (Co)polymeren und durch UV härtbaren (Co)polymeren; und (III), wenn an der Luft trocknende (Co)polymere ausgewählt werden, 0,8 bis 2,0 Gew.-% Wachs, zusätzlich zu den üblichen Zusatzstoffen, wobei die besagte Zusammensetzung;(a) aufgetragen wird in solch einer Menge, dass man ein trockenes Filmgewicht von 1,5 bis 5 g/m2 erhält, und dann(b) einem Trocknen an der Luft unterzogen wird, und, dort wo es angebracht ist, durch UV gehärtet wird. - Verfahren gemäß Anspruch 1, bei welchem die Zusammensetzung eine Viskosität von 15 bis 30 s aufweist, gemessen mithilfe der standardisierten Methode nach DIN 4 bei 23 °C.
- Verfahren gemäß Anspruch 2, bei welchem die Zusammensetzung eine Viskosität von 15 bis 30 s aufweist.
- Verfahren gemäß irgendeinem der Ansprüche 1 bis 3, bei welchem das Papier ein Gewicht von 100 g/m2 oder weniger aufweist.
- Verfahren gemäß Anspruch 4, bei welchem das Papier ein Gewicht von 75 bis 95 g/m2 aufweist.
- Verfahren gemäß irgendeinem der Ansprüche 1 bis 5, bei welchem die Acryl(co)polymere von der Art sind, die durch UV gehärtet werden können.
- Verfahren gemäß irgendeinem der Ansprüche 1 bis 6, bei welchem das Wachs ein Polyethylenwachs ist.
- Verfahren gemäß irgendeinem der Ansprüche 1 bis 6, bei welchem das Wachs ein mikronisiertes Wachs ist.
- Verfahren gemäß irgendeinem der Ansprüche 1 bis 8, bei welchem die Zusammensetzung bis zu 0,5 Gew.-% eines Copolymers aus Polysiloxan und Polyether als Zusatzmittel enthält.
- Verfahren gemäß irgendeinem der Ansprüche 1 bis 9, bei welchem die Zusammensetzung unter Einsatz der Walzenbeschichtung aufgebracht wird.
- Einsatz der Zusammensetzung wie sie in irgendeinem der Ansprüche 1 bis 9 beschrieben ist als eine dünne Schutzschicht für bedrucktes Papier.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP98102976A EP0860297B1 (de) | 1997-02-20 | 1998-02-20 | Verfahren zur Herstellung von Banknoten |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP97102773 | 1997-02-20 | ||
EP97102773A EP0860296A1 (de) | 1997-02-20 | 1997-02-20 | Verfahren zur Herstellung von Banknoten |
EP98102976A EP0860297B1 (de) | 1997-02-20 | 1998-02-20 | Verfahren zur Herstellung von Banknoten |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0860297A1 EP0860297A1 (de) | 1998-08-26 |
EP0860297B1 true EP0860297B1 (de) | 2001-10-31 |
Family
ID=8226507
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97102773A Withdrawn EP0860296A1 (de) | 1997-02-20 | 1997-02-20 | Verfahren zur Herstellung von Banknoten |
EP98102976A Revoked EP0860297B1 (de) | 1997-02-20 | 1998-02-20 | Verfahren zur Herstellung von Banknoten |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97102773A Withdrawn EP0860296A1 (de) | 1997-02-20 | 1997-02-20 | Verfahren zur Herstellung von Banknoten |
Country Status (6)
Country | Link |
---|---|
EP (2) | EP0860296A1 (de) |
AT (1) | ATE207818T1 (de) |
DE (1) | DE69802216T2 (de) |
DK (1) | DK0860297T3 (de) |
ES (1) | ES2166113T3 (de) |
PT (1) | PT860297E (de) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU2001255622A1 (en) * | 2000-06-12 | 2001-12-24 | Leonard B. Pearson | Detachable computer mouse pad surfaces in padded-ply form |
US7073762B2 (en) | 2000-06-12 | 2006-07-11 | Pearson Leonard B | Detachable computer mouse pad surface in multiple sheet form |
US7052762B2 (en) | 2001-05-24 | 2006-05-30 | 3M Innovative Properties Company | Low Tg multilayer optical films |
EP1629986A1 (de) | 2004-08-24 | 2006-03-01 | Kba-Giori S.A. | Sicherheitsdruckverfahren und Sicherheitsdokument |
GB2419110A (en) * | 2004-10-14 | 2006-04-19 | Nicholas John Murray | An authentication article encapsulated in a curable coating on a substrate |
ATE467516T1 (de) | 2006-12-15 | 2010-05-15 | Kba Giori Sa | Schutzbeschichtung für gedruckte sicherheiten |
WO2015023274A1 (en) * | 2013-08-14 | 2015-02-19 | Hewlett-Packard Development Company, Lp | Inkjet ink set |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1599756A (en) * | 1977-01-21 | 1981-10-07 | Unilever Ltd | Treatment of printed surfaces |
DE3225875A1 (de) * | 1982-07-10 | 1984-01-12 | Basf Ag, 6700 Ludwigshafen | Copolymerisate aus 2 bis 3 c-atomen enthaltenden monoolefinisch ungesaettigten carbonsaeuren und styrol und deren verwendung zur herstellung von waessrigen papierlacken |
DE4138073A1 (de) * | 1991-11-19 | 1993-05-27 | Dyes Joachim Lackfab Gmbh | Drucklack auf wasserbasis |
DE4336214A1 (de) * | 1992-10-23 | 1994-04-28 | Guenther Dr Schwarz | Verfahren und Vorrichtung zur Herstellung von Überzügen auf Oberflächen |
US5384160A (en) * | 1993-03-11 | 1995-01-24 | Frazzitta; Joseph | Method of coating a surface |
-
1997
- 1997-02-20 EP EP97102773A patent/EP0860296A1/de not_active Withdrawn
-
1998
- 1998-02-20 DE DE69802216T patent/DE69802216T2/de not_active Revoked
- 1998-02-20 ES ES98102976T patent/ES2166113T3/es not_active Expired - Lifetime
- 1998-02-20 PT PT98102976T patent/PT860297E/pt unknown
- 1998-02-20 DK DK98102976T patent/DK0860297T3/da active
- 1998-02-20 EP EP98102976A patent/EP0860297B1/de not_active Revoked
- 1998-02-20 AT AT98102976T patent/ATE207818T1/de not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
EP0860296A1 (de) | 1998-08-26 |
DE69802216T2 (de) | 2002-06-27 |
EP0860297A1 (de) | 1998-08-26 |
ATE207818T1 (de) | 2001-11-15 |
DK0860297T3 (da) | 2002-02-18 |
DE69802216D1 (de) | 2001-12-06 |
PT860297E (pt) | 2002-04-29 |
ES2166113T3 (es) | 2002-04-01 |
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