WO1996030811A2 - Produit en papier a une couche - Google Patents

Produit en papier a une couche Download PDF

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Publication number
WO1996030811A2
WO1996030811A2 PCT/EP1996/000997 EP9600997W WO9630811A2 WO 1996030811 A2 WO1996030811 A2 WO 1996030811A2 EP 9600997 W EP9600997 W EP 9600997W WO 9630811 A2 WO9630811 A2 WO 9630811A2
Authority
WO
WIPO (PCT)
Prior art keywords
paper product
product according
paper
thermoplastic material
color
Prior art date
Application number
PCT/EP1996/000997
Other languages
German (de)
English (en)
Other versions
WO1996030811A3 (fr
Inventor
Reinhold Uhlemayr
Original Assignee
Drescher Geschäftsdrucke Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Drescher Geschäftsdrucke Gmbh filed Critical Drescher Geschäftsdrucke Gmbh
Priority to AU51038/96A priority Critical patent/AU5103896A/en
Publication of WO1996030811A2 publication Critical patent/WO1996030811A2/fr
Publication of WO1996030811A3 publication Critical patent/WO1996030811A3/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/14—Security printing
    • B41M3/142—Security printing using chemical colour-formers or chemical reactions, e.g. leuco-dye/acid, photochromes
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G7/00—Selection of materials for use in image-receiving members, i.e. for reversal by physical contact; Manufacture thereof
    • G03G7/0006—Cover layers for image-receiving members; Strippable coversheets
    • G03G7/0013—Inorganic components thereof
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G7/00—Selection of materials for use in image-receiving members, i.e. for reversal by physical contact; Manufacture thereof
    • G03G7/0006—Cover layers for image-receiving members; Strippable coversheets
    • G03G7/002—Organic components thereof
    • G03G7/0026—Organic components thereof being macromolecular
    • G03G7/004—Organic components thereof being macromolecular obtained by reactions only involving carbon-to-carbon unsaturated bonds

Definitions

  • the invention relates to a single-layer paper product for printing with laser printer toner materials.
  • Laser printing as a machine-made printout of computer systems is being used more and more, also in areas in which the creation of originals and in particular also originals with security-relevant data is concerned.
  • Originals, in particular originals with security-relevant data mean, for example, notifications from insurance companies regarding the guarantee of certain insurance benefits, computer-generated check printouts, computer-generated official certificates, etc., in which the machine or computer -Printed printout is regarded as the original document and immediately grants rights of any kind to the owner and / or owner of this publication or confirms any operations.
  • a particular problem with the security-relevant original documents that are created with laser printer technology is that the sintered toner material is often made using relatively simple means, such as, for example, sharp-edged objects, can be removed relatively easily from the paper product, without a noticeable change in the paper surface necessarily taking place and the paper product thus directly providing information about the attempted manipulation. This is due in particular to the fact that the times and temperatures available during the sintering of the toner material and the available toner materials themselves cannot offer any guarantee that a permanent connection will be made with the underlying paper layer of the paper product.
  • the possibility of counterfeiting is opened in the simplest way with such documents or original pieces. For example, this problem illuminates the message that machine-generated receipts authorizing disbursement lead to disbursement rates of significantly more than 100%.
  • the object of the present invention is to improve a single-ply paper product of the type described at the outset in such a way that, after printing with a laser printer toner material, counterfeiting is made much more difficult and, in particular, attempts at manipulation can be clearly recognized.
  • the single-ply paper product is provided with a flat, uniform coating applied to at least some areas on a surface with a primer composition which comprises a thermoplastic material which is produced at elevated temperature forms a mechanically inseparable bond between the toner material sintered at the elevated temperature and the paper layer of the paper product.
  • the single-layer paper product at least in the safety-relevant surface areas, is provided with the above-mentioned coating with a primer mass, when printing in these areas such a close bond between the sintered toner material and the paper layer is created that a me Mechanical removal of the print can only take place with destruction of the paper surface of the paper layer.
  • the original laser print-out immediately recognizes that manipulation has taken place here, and the changed original can no longer, or at least not easily, be provided with a partially modified print.
  • thermoplastic material of the primer composition can be selected so that it liquefies at the elevated temperature which is required for the sintering of the toner material and forms a dissolving phase for the toner material, which is partially dissolved and thus forms a firm bond with the thermoplastic material and the underlying paper layer during curing.
  • thermoplastic material can be selected such that the toner material at the elevated temperature and the thermoplastic material at the common interface, at least partially, form a common phase and thus merge into one another without a phase boundary. This also creates the possibility of a very strong bond between the sintered toner material and the paper layer, which can no longer be separated mechanically without damaging the paper surface.
  • thermoplastic material at the elevated temperature required for sintering the toner material, liquefaction takes place to such an extent that it partially penetrates into the paper fiber composite of the paper layer and thus leads to a further improved adhesion with the Paper layer leads.
  • the toner components which enable the sintering process and produce the bond with the paper to be printed, are binders, which are usually selected from polystyrene acrylates, polyesters and polybutadiene, which have proven particularly useful in toners which are exposed to heat and pressure, ie so be fixed on contact.
  • composition of the primer composition according to the invention must, of course, take into account the toner binder in some respects, and here a primer composition with a thermoplastic material based on it has become particularly useful for toners containing polystyrene acrylates as binders recommended by vinyl acetate or acrylate or methacrylate polymers. This is surprising, since polyvinyl acetates in particular are generally recommended as release agents as toner additives and ensure that the toner can be adequately cleaned from the fixing roller.
  • thermoplastic materials are vinyl acetate polymers, copolymers of vinyl acetate with vinyl laurate and / or vinyl chloride and / or ethylene as well as acrylate polymers and methyl acrylate polymers and copolymers with styrene thereof.
  • thermoplastic materials are preferably used in the primer composition in the form of 40 to 60% by weight. % aqueous dispersions.
  • the primer composition can comprise fillers, in particular particulate, granular fillers, with fractions of up to 80% by weight, based on the total primer composition, the fillers predominantly comprising pigments and materials which modify the primer composition include.
  • a filler content of the primer mass of at least approx. 20% by weight is recommended.
  • the paper product is used for the production of one-sheet mailers, that is to say letters which after printing have been folded, they are then folded and then sealed and made ready for dispatch
  • the primer can optionally be used to serve as an adhesive for gluing two layers of paper of the paper product together. This seal sets limits to the filler content, since from a filler content of approx. 50% by weight the quality of the seal decreases significantly or significantly higher temperatures are required for good sealing of the one-sheet mailers.
  • the coating weights with which the primer mass is applied to the paper product are normally in the range from 2 to 10 g / m 2, preferably from 4 to 7 g / m 2 and most preferably from 5 to 6 g / tv. These coating weights are understood in each case for the coated, ready-to-use paper product.
  • the pigment portions of the filler which have been mentioned above, can on the one hand serve to improve the grip of the paper, and on the other hand can of course also be used for coloring the same and for emphasizing the coated paper surfaces, here in particular the safety-relevant surface areas to be printed.
  • the invention also relates to a single-layer, machine-printable paper product which, through a different type of treatment of the surface to be printed, leads to an increase in the protection against forgery of the machine-printed originals.
  • a problem with machine-made originals printed with laser toner materials is that certain solvents, such as e.g. Isopropyl alcohol, methyl ethyl ketone, acetone and toluene, easily allow the toner material to peel off the paper surface.
  • solvents such as e.g. Isopropyl alcohol, methyl ethyl ketone, acetone and toluene
  • the imprints which have been chemically removed in this way can then be printed with other information without the paper product itself providing proof thereof without the counterfeit original being able to be distinguished from the original.
  • a machine-printable single-ply paper product which is characterized by a flat, uniform coating applied to a surface to be printed, at least in some areas, which is carried out with a coating composition comprising a color component, the color component being in contact with a Solvent shows a color reaction.
  • the mentioned color reaction can occur in many configurations and consist, for example, in the bleeding out of a color component, which produces typical and non-removable color contours on the original paper product.
  • the color component comprises a leuco dye and a so-called color developer, which are present alongside one another in the coating composition, often at least one of the reactants, ie the leuco dye or the color developer, being present in encapsulated form in microcapsules.
  • the leuco dye is as the color developer is offered a reaction medium in which the color reaction takes place and the dye can be formed, which is noticeable in a discoloration of the correspondingly coated areas of the paper product.
  • transport processes relating to the dye are associated with the spreading of a solvent drop, so that a strikingly different coloration on the paper surface is inevitably obtained. This also causes an irreversible change in the printed original and indicates the attempted manipulation of the original document.
  • a color component that can undergo a color reaction with solvents also includes a further safety aspect.
  • a further safety aspect In addition to the possibility of being able to detect attempts at forgery on the original, there is also the possibility to check very easily whether the printout presented is an original or a simple color copy, in which, of course, this bleeding effect or the color formation reaction or in general the color reaction of the color component does not take place.
  • Bis-phenol A is frequently used as the color developer in this connection, and the leuco base or the leuco dye is regularly introduced in encapsulated form in the coating composition.
  • the microcapsule walls can then be adjusted so that when they come into contact with solvents which also detach the toner material, they soften or break through and in any case release the leuco dye so that it can initiate the color development reaction with the color developer.
  • the abovementioned coating composition comprises a primer composition as described at the outset, so that the single-ply, machine-printable paper product can be both counterfeit-proof with regard to mechanical attempts at counterfeiting and chemical attacks.
  • a conscious color design of the security-relevant and machine-to-print fields can be carried out, in which case slightly bleeding dyes or dye combinations can also be used in the color-designed printing areas, which are under the actual printing ink for this section can be mixed in.
  • the proportions of caustic soda make the coating material slightly alkaline, so that even with somewhat acidic paper a uniform coating can be achieved.
  • the shares in microtalkum and Calcium carbonate serve to improve the grip of the paper or to push back the plastic-finished handle.
  • Mowilith LDM 7410 offers a first significant improvement in the toner adhesion compared to the uncoated paper
  • 1000 parts and especially the 1520 parts are able to produce a very good adhesion of the toner material with the underlying paper layer.
  • the toner adhesion was checked on prints from a Siemens printer NDX No. 2140 with an average printing performance of 8000 sheets / hour (12-inch format) and a fixing temperature of approx. 230 ° C.
  • thermoplastic material allows a significant improvement in the adhesion of the sintered toner material on the paper surface, while already 1000 parts and especially 1520 parts completely effectively prevent mechanical attempts at removal, and only a complete detachment enable by serious injury to the paper surface.
  • Vinnapas EP 400 from Wacker Chemie is added in 750 parts, 1000 parts and 1520 parts, and after coating as described above, results comparable to Example 1 with regard to toner adhesion on the paper layer and its further processing to single-sheet mailers.
  • a Vinnapas oil version T53 / 22 VL from Wacker Chemie was used instead of the Mowilith LDM 7410, in proportions of 750, 1000 and 1520 parts and with the same quantitative ratios applied as previously described.
  • Example 1 was added as a thermoplastic material Vinnapas dispersion EP 11 from Wacker Chemie, in 750 parts, 1000 parts and 1520 parts, the same positive after an application as described above Result regarding the connection of the sintered toner material with the underlying paper layer.
  • the addition of the 75 parts of microtalkum with a grain size> 10 ⁇ and the chemically precipitated calcium carbonate ensures that the proportions of the thermoplastic material in the coating lead to a plastic-ready grip on the paper.
  • a pearlescent dye for example Iriodin 111 or Iriodin 103 from the company Merck was added and 950 parts of Mowilith LDM 7410 (Hoechst AG) were then added to this mixture.
  • a paper with 5 to 6 g / ⁇ r 1 results in a paper with a paper handle, ie the proportions of iriodin already reduce the plastic handle of the paper to a sufficient extent and, moreover, ensure a pearlescent appearance of the paper, which is the same as usual Color copiers are not reproducible.
  • the sintered toner material adhere perfectly to the underlying paper layer, but it also makes it possible to produce printed originals that cannot be reproduced using the available copying options. Processing to single-sheet mailers also delivers satisfactory results.
  • the coating composition is made from 20 g transparent white 12D 0380-LDS (Gebr. Schmid GmbH, Druckmaschinefabrik, Cologne) a typical transparent lacquer for wet offset, which serves as a binder here (oxidative drying lacquer based on linseed oil). 1 g of crystal violet lactone in finely ground form and 1 g bisphenol A, likewise in finely ground form, are added to this binder.
  • the crystal violet lactone is a leuco dye, but bisphenol A is the associated color developer.
  • the leuco dye and the color developer can be present side by side in the transparent white binder without any problem, without the development of color. After sufficient homogenization, the coating composition is applied to the paper with an application weight of approx.
  • This mixture was also applied to the paper to be coated with an application weight of approximately 2.5 g / m 2 .
  • a solvent such as, for example, isopropyl alcohol, toluene, acetone, methyl ethyl ketone, etc., which are able to detach sintered toner materials from the paper, bleeding effects have been achieved which are initially preceded by the formation of a red-violet color complex, which migrates with the liquid front in the paper and thus produces clearly visible color spots or color fronts on the paper.
  • the transparent white used above is homogenized in an amount of 20 g with 1 g of finely ground RODAMIN 6G DN dye and applied with a coating weight of approx. 2.5 g / m 2 .
  • the RODAMIN 6G DN is already the dye form, so that this coating gives the paper a red-orange color.
  • a bleeding effect occurs immediately, ie a front with concentrated dye in the paper migrates from the application point of the droplet of solvent, which does not remove again even through increased application of solvent leaves.
  • the attempted manipulation or forgery is visibly preserved.
  • the papers coated with combined formulations as explained for Examples 1 to 5, can be sealed into single-sheet mailers on account of the proportion of primer they contain.

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  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Inorganic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Paper (AREA)
  • Paints Or Removers (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

Pour rendre plus difficile la contrefaçon avec un produit en papier à une couche destiné à être imprimé avec des toners d'imprimante au laser, il est proposé d'appliquer sur une face, au moins par endroits, une première couche de fond régulière en nappe, contenant un produit thermoplastique qui, à une température élevée, forme un amalgame, inséparable par des moyens mécaniques, avec le toner fritté du fait de la température élevée et avec la couche de papier.
PCT/EP1996/000997 1995-03-24 1996-03-08 Produit en papier a une couche WO1996030811A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU51038/96A AU5103896A (en) 1995-03-24 1996-03-08 Single-layer paper product

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19510974.0 1995-03-24
DE1995110974 DE19510974A1 (de) 1995-03-24 1995-03-24 Einlagiges Papiererzeugnis

Publications (2)

Publication Number Publication Date
WO1996030811A2 true WO1996030811A2 (fr) 1996-10-03
WO1996030811A3 WO1996030811A3 (fr) 1996-12-12

Family

ID=7757732

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1996/000997 WO1996030811A2 (fr) 1995-03-24 1996-03-08 Produit en papier a une couche

Country Status (3)

Country Link
AU (1) AU5103896A (fr)
DE (1) DE19510974A1 (fr)
WO (1) WO1996030811A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009077536A2 (fr) * 2007-12-19 2009-06-25 Agfa-Gevaert Nv Procédé de préparation de documents de sécurité inviolables et document de sécurité inviolable
EP2657772A1 (fr) * 2012-04-27 2013-10-30 Schoeller Technocell GmbH & Co. KG Matériau dýenregistrement pour un procédé dýimpression électrographique

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0845711B1 (fr) * 1996-11-29 2000-10-04 Agfa-Gevaert N.V. Méthode de fabrication de documents de sécurité comprenant une couche réceptrice de révélateur
GB0030132D0 (en) 2000-12-09 2001-01-24 Arjo Wiggins Fine Papers Ltd Security paper
DE102008019211A1 (de) * 2008-04-11 2009-10-15 Bayropa Jung Gmbh Mit thermoplastischem Klebemittel beschichtetes, Silikonöl-abweisendes Papiererzeugnis

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1950029A1 (de) * 1969-10-03 1971-04-15 Philips Patentverwaltung Verfahren zur Fixierung von trockenen pulverfoermigen Druckfarben
EP0031161A1 (fr) * 1979-12-20 1981-07-01 GAO Gesellschaft für Automation und Organisation mbH Papier de sécurité protégé contre les falsifications
EP0190087A1 (fr) * 1985-01-21 1986-08-06 Aussedat-Rey Papier de sécurité infalsifiable, procédé pour rendre infalsifiable un papier et composition aqueuse ou organique utile, notamment pour rendre un papier infalsifiable
EP0243285A1 (fr) * 1986-04-24 1987-10-28 Aussedat-Rey Papier de sécurité infalsifiable et/ou authentifiable par thermochromie et son procédé de préparation
EP0424343A2 (fr) * 1989-10-17 1991-04-24 International Paper Company Papier utilisé pour l'impression par déposition d'ions
US5045426A (en) * 1989-06-21 1991-09-03 The Standard Register Company Toner adhesion-enhancing coating for security documents

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63266460A (ja) * 1987-04-24 1988-11-02 Nippon Kako Seishi Kk 圧力定着用紙
JPH06313298A (ja) * 1993-04-28 1994-11-08 Tokushu Seishi Kk 偽造防止用紙及び偽造防止印刷物

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1950029A1 (de) * 1969-10-03 1971-04-15 Philips Patentverwaltung Verfahren zur Fixierung von trockenen pulverfoermigen Druckfarben
EP0031161A1 (fr) * 1979-12-20 1981-07-01 GAO Gesellschaft für Automation und Organisation mbH Papier de sécurité protégé contre les falsifications
EP0190087A1 (fr) * 1985-01-21 1986-08-06 Aussedat-Rey Papier de sécurité infalsifiable, procédé pour rendre infalsifiable un papier et composition aqueuse ou organique utile, notamment pour rendre un papier infalsifiable
EP0243285A1 (fr) * 1986-04-24 1987-10-28 Aussedat-Rey Papier de sécurité infalsifiable et/ou authentifiable par thermochromie et son procédé de préparation
US5045426A (en) * 1989-06-21 1991-09-03 The Standard Register Company Toner adhesion-enhancing coating for security documents
EP0424343A2 (fr) * 1989-10-17 1991-04-24 International Paper Company Papier utilisé pour l'impression par déposition d'ions

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Section Ch, Week 9504 Derwent Publications Ltd., London, GB; Class A97, AN 95-027928 XP002006915 & JP,A,06 313 298 (TOKOSHU SEISHI) , 8.November 1994 *
PATENT ABSTRACTS OF JAPAN vol. 13, no. 85 (P-834) [3433] , 27.Februar 1989 & JP,A,63 266460 (NIPPON KAKO SEISHI), 2.November 1988, *
RESEARCH DISCLOSURES, Nr. 172, 1.August 1978, HAVANT. GB, Seite 10 XP002006914 "Paper for xerographic copying" *
XEROX DISCLOSURE JOURNAL, Bd. 14, Nr. 1, 1.Januar 1989 - 28.Februar 1989, STAMFORD CONNECTICUT USA, Seite 37 XP000093449 N.A.NIELSEN: "Coating composition to enhance durability of xerographic images" *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009077536A2 (fr) * 2007-12-19 2009-06-25 Agfa-Gevaert Nv Procédé de préparation de documents de sécurité inviolables et document de sécurité inviolable
WO2009077536A3 (fr) * 2007-12-19 2009-08-20 Agfa Gevaert Nv Procédé de préparation de documents de sécurité inviolables et document de sécurité inviolable
EP2657772A1 (fr) * 2012-04-27 2013-10-30 Schoeller Technocell GmbH & Co. KG Matériau dýenregistrement pour un procédé dýimpression électrographique
US8986818B2 (en) 2012-04-27 2015-03-24 Schoeller Technocell Gmbh & Co. Kg Recording material for electrophotographic printing methods

Also Published As

Publication number Publication date
WO1996030811A3 (fr) 1996-12-12
AU5103896A (en) 1996-10-16
DE19510974A1 (de) 1996-09-26

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