WO2000012320A1 - Materiau d'enregistrement thermosensible - Google Patents

Materiau d'enregistrement thermosensible Download PDF

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Publication number
WO2000012320A1
WO2000012320A1 PCT/EP1999/005690 EP9905690W WO0012320A1 WO 2000012320 A1 WO2000012320 A1 WO 2000012320A1 EP 9905690 W EP9905690 W EP 9905690W WO 0012320 A1 WO0012320 A1 WO 0012320A1
Authority
WO
WIPO (PCT)
Prior art keywords
heat
layer
sensitive recording
recording material
sensitive
Prior art date
Application number
PCT/EP1999/005690
Other languages
German (de)
English (en)
Inventor
Erich Kranz
Original Assignee
Mitsubishi Hitec Paper Flensburg 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 Mitsubishi Hitec Paper Flensburg Gmbh filed Critical Mitsubishi Hitec Paper Flensburg Gmbh
Publication of WO2000012320A1 publication Critical patent/WO2000012320A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/30—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using chemical colour formers
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/124—Duplicating or marking methods; Sheet materials for use therein using pressure to make a masked colour visible, e.g. to make a coloured support visible, to create an opaque or transparent pattern, or to form colour by uniting colour-forming components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/124—Duplicating or marking methods; Sheet materials for use therein using pressure to make a masked colour visible, e.g. to make a coloured support visible, to create an opaque or transparent pattern, or to form colour by uniting colour-forming components
    • B41M5/165—Duplicating or marking methods; Sheet materials for use therein using pressure to make a masked colour visible, e.g. to make a coloured support visible, to create an opaque or transparent pattern, or to form colour by uniting colour-forming components characterised by the use of microcapsules; Special solvents for incorporating the ingredients

Definitions

  • the invention relates to a heat-sensitive recording material with a counterfeit-recognizing agent, comprising a carrier paper with a recording layer arranged on one side, which contains color formers and organic color acceptors which react with one another under the action of heat.
  • Heat-sensitive recording materials of the type specified above have been known for a long time. These materials are mainly used to record fax copies that are sent over public telephone networks - so-called fax procedures. An increasingly important area of application for heat-sensitive recording materials has recently been in use as a receipt, parking tickets for parking machines, admission tickets and tickets and vouchers for all kinds of games of chance.
  • a heat-sensitive image transfer recording sheet which has a heat-sensitive recording layer on one side of its support and a heat and pressure-sensitive image transfer layer on the other side.
  • Microcapsules containing a colorless color former in a non-volatile solvent and microcapsules containing a color acceptor in a non-volatile solvent are arranged in the heat and pressure-sensitive image transfer layer.
  • Also in the image transfer layer is a solid colorless electron-donating color former and a solid colorless electron accepting color developer and a wax.
  • the heat-sensitive image transfer recording sheet is placed on a simple sheet of paper and a thermal head is applied to the heat-sensitive recording layer, an image is formed on the heat-sensitive recording layer and the image of the recording is formed on the simple paper by heat transfer.
  • a thermal head is applied to the heat-sensitive recording layer
  • an image is formed on the heat-sensitive recording layer and the image of the recording is formed on the simple paper by heat transfer.
  • an image can also be formed on the simple paper sheet.
  • DE-37 04 627 A1 provides a heat-sensitive recording material in which the color reaction takes place between a diazo compound and an associated coupling component , before that at least one of the two reaction components is contained in a microcapsule in order to improve the shelf life of the blank material and the sensitivity.
  • DE-39 38 978 A1 discloses a two-color recording material in which a heat-sensitive color-forming layer known per se and a photosensitive heat-sensitive color-forming layer are applied in succession to a support, which contains microcapsules in which a leuco dye and a photo-oxidizing agent are contained and a reducing agent in the photosensitive heat-sensitive color formation layer is present.
  • the photosensitive, heat-sensitive recording layer is formed by heating with a heating block and subsequent irradiation with an ultra-high-pressure mercury lamp.
  • DE 43 31 260 C2 provides a recognition layer applied on the back, which contains unencapsulated components which result in a color-forming reaction with a reagent to be applied.
  • the reagent to be applied separately is disadvantageous.
  • JP 08 300 810 A discloses a heat-sensitive recording material which, in addition to the heat-sensitive coating applied to its front, provides a layer of color images and acceptors applied to the front of its support, which attempts to make counterfeiting visible on the front of the heat-sensitive recording material. At least one of the reactants is encapsulated. The color image ners and acceptors existing layer is covered with a polyolefin resin layer, not disclosed in any more detail, on which a transparent or translucent paper is arranged.
  • a disadvantage of this proposal in addition to the complicated structure of the recording material, is that the image created by the attempted falsification does not stand out clearly enough from the image produced by heat on the front side.
  • the object of the present invention is to design heat-sensitive recording materials which can be used, for example, as admission tickets, tickets, forms, receipts and for games of chance, and which recognize the attempted forgeries without the use of mechanical or electrical auxiliary devices such as UV lamps or on the Allow recording material to apply chemicals.
  • the mass per unit area of the SC layer is in the range from 1 to 10 g / m 2 , preferably in the range from 4 to 7 g / m 2 .
  • a suitable composition of the SC layer is given below:
  • microcapsules 20 to 50% by weight of microcapsules, preferably 25 to 40% by weight
  • binder 8 to 40% by weight of binder, preferably 10 to 25% by weight
  • Inhibited starch and / or cellulose powder can be used as spacers.
  • the color tone produced as a result of the action of pressure as a reaction of the color formers with the acceptors in the SC layer is preferably in contrast to the color of the SC layer and to the colors in the recording layer which result from the action of heat.
  • Wood-free papers with a mass per unit area of 45 to 250 g / m 2 are preferably used as backing papers.
  • the heat-sensitive recording material together with the SC layer has a mass per unit area from 48 to 270 g / m 2 , in particular from 70 to 150 g / m 2 .
  • a spot application of the SC layer is to be emphasized as a preferred embodiment, particularly in the higher-value application area for receipts and forms.
  • the following example explains the invention:
  • a pigmented pre-coat of 8 g / m 2 is applied to a backing paper with a mass per unit area of 92 g / m 2 .
  • a heat sensitive recording layer of 4 g / m 2 is applied to the primer.
  • An SC layer of 5 g / m 2 is coated on the opposite side of the backing paper.
  • a pressure is created on the pressure-sensitive side of the heat-sensitive recording material.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Heat Sensitive Colour Forming Recording (AREA)

Abstract

L'invention concerne un matériau d'enregistrement thermosensible comportant un moyen permettant d'identifier une falsification, qui comprend un papier support muni d'une couche d'enregistrement appliquée sur une face, qui contient des substances chromogènes et des accepteurs de couleurs réagissant les uns aux autres, sous l'effet de la chaleur. Une couche de type SC dans laquelle se trouvent des accepteurs et des microcapsules contenant des substances chromogènes encapsulées dedans, est appliquée sur la face du papier support, opposée à la couche d'enregistrement. Les substances chromogènes et les accepteurs induisent une réaction chromogène sous l'effet de pression.
PCT/EP1999/005690 1998-08-27 1999-08-06 Materiau d'enregistrement thermosensible WO2000012320A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1998138894 DE19838894A1 (de) 1998-08-27 1998-08-27 Wärmeempfindliches Aufzeichnungsmaterial
DE19838894.2 1998-08-27

Publications (1)

Publication Number Publication Date
WO2000012320A1 true WO2000012320A1 (fr) 2000-03-09

Family

ID=7878844

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1999/005690 WO2000012320A1 (fr) 1998-08-27 1999-08-06 Materiau d'enregistrement thermosensible

Country Status (2)

Country Link
DE (1) DE19838894A1 (fr)
WO (1) WO2000012320A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0642928A1 (fr) * 1993-09-15 1995-03-15 RENKER GmbH & Co. KG Matériau pour l'enregistrement thermosensible
JPH08300810A (ja) * 1995-05-10 1996-11-19 Mitsubishi Paper Mills Ltd 記録シートおよび偽造検知方法
JPH09131965A (ja) * 1995-11-08 1997-05-20 Mitsubishi Paper Mills Ltd 消色型自己発色性感圧記録シート

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0642928A1 (fr) * 1993-09-15 1995-03-15 RENKER GmbH & Co. KG Matériau pour l'enregistrement thermosensible
DE4331260A1 (de) * 1993-09-15 1995-03-16 Renker Gmbh & Co Kg Wärmeempfindliches Aufzeichnungsmaterial mit rückseitiger Erkennungsschicht
JPH08300810A (ja) * 1995-05-10 1996-11-19 Mitsubishi Paper Mills Ltd 記録シートおよび偽造検知方法
JPH09131965A (ja) * 1995-11-08 1997-05-20 Mitsubishi Paper Mills Ltd 消色型自己発色性感圧記録シート

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Section Ch Week 199730, Derwent World Patents Index; Class G05, AN 1997-327954, XP002122635 *
PATENT ABSTRACTS OF JAPAN vol. 1997, no. 03 31 March 1997 (1997-03-31) *

Also Published As

Publication number Publication date
DE19838894A1 (de) 2000-03-09

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