EP0642928B1 - Matériau pour l'enregistrement thermosensible - Google Patents

Matériau pour l'enregistrement thermosensible Download PDF

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Publication number
EP0642928B1
EP0642928B1 EP94114571A EP94114571A EP0642928B1 EP 0642928 B1 EP0642928 B1 EP 0642928B1 EP 94114571 A EP94114571 A EP 94114571A EP 94114571 A EP94114571 A EP 94114571A EP 0642928 B1 EP0642928 B1 EP 0642928B1
Authority
EP
European Patent Office
Prior art keywords
layer
weight
methyl
diethylamino
heat
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.)
Expired - Lifetime
Application number
EP94114571A
Other languages
German (de)
English (en)
Other versions
EP0642928A1 (fr
Inventor
Peter Dr. Wenz
Martin Dr. Schreer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sihl GmbH
Original Assignee
Sihl 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 Sihl GmbH filed Critical Sihl GmbH
Publication of EP0642928A1 publication Critical patent/EP0642928A1/fr
Application granted granted Critical
Publication of EP0642928B1 publication Critical patent/EP0642928B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
    • B41M5/42—Intermediate, backcoat, or covering layers
    • 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
    • B41M5/26—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
    • 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
    • B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
    • B41M5/42—Intermediate, backcoat, or covering layers
    • B41M5/426—Intermediate, backcoat, or covering layers characterised by inorganic compounds, e.g. metals, metal salts, metal complexes
    • 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
    • B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
    • B41M5/42—Intermediate, backcoat, or covering layers
    • B41M5/44—Intermediate, backcoat, or covering layers characterised by the macromolecular compounds

Definitions

  • the invention relates to a heat-sensitive recording material, on the back of which a detection layer is applied.
  • a heat-sensitive image transfer material is known, on the front of which a heat-sensitive recording layer and on the back of which are both heat and pressure-sensitive image transfer layer are arranged.
  • the image transfer layer contains wax and in microcapsules and non-encapsulated reactants which form a color when they come into contact with one another.
  • the disadvantage of this transfer material is that, in addition to the non-encapsulated reaction partners of the heat transferable image transfer layer, two different types of microcapsules must be present in the transfer layer in order to enable image recordings to be transferred due to pressure.
  • the object of the present invention is to provide a heat-sensitive recording material with a detection layer on the back of the carrier.
  • a heat-sensitive recording material with a heat-sensitive layer which contains a color former and an acidic color developer as a reaction partner, on one side of a sheet-like support material and a layer arranged on the opposite side of the support material, which is a reaction partner of the color-forming reaction in a binder contains, characterized in that the layer present on the opposite side of the carrier material is not an image transfer layer and only contains either electron-accepting acid color developer or electrons emit the color former.
  • This detection layer can be mixed with a liquid which is the reactant for the in the detection layer contains existing either acidic color developer or electron-donating color former, are activated upon contact with one another to form a color.
  • the heat-sensitive recording layer usually contains a dye precursor compound which forms a color when reacted with heat with a suitable acidic compound as reactant, one or more fusible compounds such as waxes, accelerators etc., binders, pigments and customary auxiliaries.
  • a combination of organic metal salts which take up electrons and organic reducing compounds such as phenols, chelating agents etc. can also be used as the heat-sensitive recording system in the recording layer.
  • An intermediate layer containing a binder and organic or inorganic pigments may be arranged between the sheet-like carrier material and the heat-sensitive recording layer, and a conventional protective layer may be present on the heat-sensitive recording layer.
  • the outgoing color formers contained in the electrons on the back of the carrier in the activatable recognition layer are the colorless electron-donating compounds known from heat-sensitive and pressure-sensitive recording layers, in particular triarylmethane compounds, especially fluoranes, diphenylmethane compounds, xanthene compounds, thiazine compounds and spiropyran compounds are suitable.
  • dyes based on triarylmethane for example 3,3-bis (p-dimethylaminophenyl) -6-dimethylamino-phthalide, 3- (p-dimethylaminophenyl) -3- (1,2-dimethylindol-3-yl) phthalide, 3- ( p-Dimethylaminophenyl) -3- (2-methylindol-3-yl) phthalide, 3,3-bis (1,2-dimethylindol-3-yl) -5-dimethylaminophthalide, 3,3-bis (1,2-dimethylindole -3-yl) -6-dimethylaminophthalide, 3,3-bis (9-ethylcarbazol-3-yl) -6-dimethylaminophthalide, 3,3-bis (2-phenylindol-3-yl) -6-dimethylaminophthalide and 3- p-dimethylaminophenyl-3- (1-
  • Lactam dyes for example rhodamine-B-anilinolactam, rhodamine (p-nitro-anilino) lactam and rhodamine (o-chloroanilino) lactam
  • fluoran dyes for example 3-dimethylamino-7-methoxyfluorane, 3-diethylamino-6-methoxyfluorane, 3-diethylamino-7-chlorofluorane, 3-diethylamino-6-methyl-7-chlorofluoran
  • the amount of color former used can be between 60 and 95% by weight, based on the weight of the dry detection layer, and the binder content is 5-40% by weight.
  • an inorganic or organic pigment is preferably used in an amount of 30-94% by weight, the binder content again being 5-40% by weight and the color former content being set to 1-65% by weight, based in each case on the weight of the dry detection layer.
  • acid-reacting, electron-accepting color developers as are known from the heat- and pressure-sensitive recording materials, are used as reactant partners in the detection layer.
  • Phenolic resins, zinc salicylates and acid clay are particularly preferred.
  • the amount of color developer can be 60-95% by weight, based on the weight of the dry detection layer, and the binder content is generally 5-40% by weight, based on the weight of the dry detection layer.
  • an inorganic or organic pigment can be used in amounts of 20-75% by weight, the binder content again being 5-40% by weight and the color developer content being 20-75% by weight.
  • binder used in the recognition layer applied on the back of the support examples include starch, oxidized starch, esterified starch, other modified starches, hydroxyethyl cellulose, carboxymethyl cellulose, gelatin, casein, gum arabic, polyvinyl alcohol, styrene-maleic anhydride copolymers, styrene-acrylic acid copolymers and styrene-butadiene on.
  • the detection layer can also contain customary aids.
  • auxiliaries are dispersants, wetting agents and defoaming agents in order to facilitate the application of the coating from aqueous coating compositions.
  • organic and inorganic pigments such as titanium dioxide, CaCO 3 , Al (OH) 3 , talc, oil-absorbing pigments such as SiO 2 , sodium aluminum silicate and kaolin, urea-formaldehyde, styrene etc. can be present.
  • the activatable detection layer can be applied to the back of the carrier material using a conventional coating or printing method, the application weight is 1 to 20 g / m 2 , preferably 1 to 10 g / m 2 (dry).
  • Panel-like support materials are paper or plastic film having basis weights 40-280 g / m 2 in question, preferably 50-250 g / m 2.
  • papers with an integrated watermark and colored and / or mottled fibers glowing under UV light can be used as an additional security indicator.
  • a heat-sensitive recording layer is applied in an amount of 5 g / m 2 onto a 70 g / m 2 neutral base paper.
  • the aqueous coating composition contains: 403 parts by weight water 18 parts by weight highly saponified polyvinyl alcohol 20 parts by weight Bisphenol A 7.5 parts by weight 3-N, N-diethylamino-6-methyl-7-anilinofluorane 25 parts by weight Stearic acid amide 30 parts by weight kaolin 1.5 parts by weight Network and Dispersing agents
  • the composition is prepared by first separately dispersing the reactants bisphenol A and 3-N, N-diethylamino-6-methyl-7-anilinofluoran together with portions of the binder and the pigments in PVA solution and then mixing the two dispersions and onto the coating base paper applied in an amount of 5 g / m 2 (dry) and dried and then satinized the paper.
  • an aqueous coating in an amount of 3 g / m 2 (dry) of the following composition is applied and dried: 3.75 parts by weight highly saponified polyvinyl alcohol 71.25 parts by weight water 25 parts by weight Copisil N 210 (chemically modified acid activated aluminum layer silicate based on montmorillonite, manufacturer: Süd-Chemie AG)
  • KVL 3,3-bis- (4-dimethylaminophenyl) -6-dimethylaminophthalide
  • composition is made by dispersing the components together or separately in PVA solution in a ball mill.
  • Example 2 The procedure is as in Example 2, except that 3-N, N-di-n-butylamino-6-methyl-7-anilinofluorane is used as color former instead of KVL.
  • a gray-black color develops on the back of the thermal paper coated in this way.

Landscapes

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

Claims (2)

  1. Matériau d'enregistrement thermosensible, qui comporte une couche d'enregistrement thermosensible d'un côté d'un matériau de support de forme plane et une couche agencée du côté opposé du matériau de support, qui contient, dans un liant, un partenaire réactionnel d'une réaction chromogène avec une substance formatrice de couleur et une substance développatrice ou révélatrice de couleur à titre de partenaires réactionnels, caractérisé en ce que la couche présente sur le côté opposé du matériau de support n'est pas une couche de transfert d'image et ne contient uniquement que des révélateurs ou développateurs de couleur acides et accepteurs d'électrons ou des formateurs de couleur donneurs d'électrons.
  2. Matériau d'enregistrement thermosensible suivant la revendication 1, caractérisé en ce que le matériau de support de forme plane est en papier ou est une feuille de matière plastique sous forme de nappe ou sous forme de feuille d'un grammage de 40 à 280 g/m2.
EP94114571A 1993-09-15 1994-09-15 Matériau pour l'enregistrement thermosensible Expired - Lifetime EP0642928B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4331260 1993-09-15
DE4331260A DE4331260C2 (de) 1993-09-15 1993-09-15 Wärmeempfindliches Aufzeichnungsmaterial mit rückseitiger Erkennungsschicht

Publications (2)

Publication Number Publication Date
EP0642928A1 EP0642928A1 (fr) 1995-03-15
EP0642928B1 true EP0642928B1 (fr) 1997-08-06

Family

ID=6497738

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94114571A Expired - Lifetime EP0642928B1 (fr) 1993-09-15 1994-09-15 Matériau pour l'enregistrement thermosensible

Country Status (4)

Country Link
EP (1) EP0642928B1 (fr)
AT (1) ATE156426T1 (fr)
DE (2) DE4331260C2 (fr)
ES (1) ES2107096T3 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19832003A1 (de) * 1998-07-16 2000-02-03 Kanzan Spezialpapiere Gmbh Mehrschichtiges Blattmaterial mit Sicherheitskennzeichen und Verfahren zur Herstellung
DE19838894A1 (de) * 1998-08-27 2000-03-09 Stora Spezialpapiere Gmbh Wärmeempfindliches Aufzeichnungsmaterial
DE10113286A1 (de) * 2001-03-16 2002-10-02 Mitsubishi Hitec Paper Flensbu Wärmeempfindlicher Aufzeichnungsbogen und seine Verwendung
DE102007006059A1 (de) * 2007-02-02 2008-08-07 Peter Dr. Schneider Verfahren zum Schutz von Produkten und Dokumenten auf Thermopapierbasis gegen Manipulation

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60168690A (ja) * 1984-02-13 1985-09-02 Mitsubishi Paper Mills Ltd 感圧性を備えた無色の感熱熱転写記録紙
US5198410A (en) * 1992-02-19 1993-03-30 Eastman Kodak Company Thermal dye transfer receiving element with backing layer

Also Published As

Publication number Publication date
DE4331260C2 (de) 1995-10-05
DE4331260A1 (de) 1995-03-16
ES2107096T3 (es) 1997-11-16
ATE156426T1 (de) 1997-08-15
DE59403624D1 (de) 1997-09-11
EP0642928A1 (fr) 1995-03-15

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