EP0058345B2 - Feuille d'enregistrement thermosensible - Google Patents

Feuille d'enregistrement thermosensible Download PDF

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Publication number
EP0058345B2
EP0058345B2 EP82100773A EP82100773A EP0058345B2 EP 0058345 B2 EP0058345 B2 EP 0058345B2 EP 82100773 A EP82100773 A EP 82100773A EP 82100773 A EP82100773 A EP 82100773A EP 0058345 B2 EP0058345 B2 EP 0058345B2
Authority
EP
European Patent Office
Prior art keywords
heat
sensitive recording
recording sheet
weight
color
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
EP82100773A
Other languages
German (de)
English (en)
Other versions
EP0058345B1 (fr
EP0058345A1 (fr
Inventor
Masuhiko Sato
Toshimi Satake
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.)
Jujo Paper Co Ltd
Original Assignee
Jujo Paper Co Ltd
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=11894856&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0058345(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Jujo Paper Co Ltd filed Critical Jujo Paper Co Ltd
Publication of EP0058345A1 publication Critical patent/EP0058345A1/fr
Application granted granted Critical
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Publication of EP0058345B2 publication Critical patent/EP0058345B2/fr
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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
    • B41M5/30—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using chemical colour formers
    • B41M5/337—Additives; Binders
    • B41M5/3375—Non-macromolecular compounds
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/913—Material designed to be responsive to temperature, light, moisture

Definitions

  • the invention relates to a heat-sensitive recording sheet which has a superior color formation effect and a high stability against hair oil, sweat and skin secretions etc.
  • a heat-sensitive recording sheet using a heat color reaction between a colorless or weakly colored chromogenic dye and a phenolic substance or an organic acid is disclosed in JP-B-4160/1968 and JP-B-14039, among others / 1970, and in JP-A-27736/1973. There is currently a wide variety of practical applications.
  • EP-A-0 048 026 describes a heat-sensitive recording material which contains 2- (2-chloroanilino) -6-di-propylaminofluorane or butyl-aminofluorane, 2- (2-chlorophenyl) amino-6-diethylaminofluorane in the color formation layer , 2-anilino-3-methyl-6-diethyl-aminofluorane, 2-anilino-3-methyl-6-N-methyl-N-cyclohexyl-aminofluorane, contains an organic color developing agent and dimethyl terephthalate.
  • this prior art is an older European application under Art. 54 (3) and (4) EPC, so that this prior art can only be used to assess the novelty of the claimed subject matter.
  • a heat-sensitive recording sheet is generally prepared by applying a coating color to the surface of the support such as paper, film, etc., which by fine grinding and dispersing a colorless chromogenic dye and a color developing material such as phenolic substances into fine particles by mixing the dispersions obtained and by adding a binder, filler, sensitizer, lubricant and other auxiliaries.
  • heat-sensitive recording sheets are widely used in practice, including medical and technical recording equipment, terminal printers of computers and information systems, printers of facsimile machines and electronic calculating machines, ticket machines and the like.
  • Such low stability against oily materials is disadvantageous in view of the function of an information recording paper. It is therefore required that a heat-sensitive recording sheet have a superior recording ability, that the whiteness does not decrease or deteriorates little with the passage of time, and that no difficulties such as e.g. the adherence of residues to the thermal head or the sticking of the heat sensitive recording sheet to the thermal head, etc. occur. Furthermore, it is desirable to find a heat-sensitive recording sheet in which the recording image and the base are resistant to the effects of hair oil sticking to the hands, sweat, etc.
  • the invention has for its object to provide a heat-sensitive recording sheet in which the recording image is very stable to the action of oily materials such as hair oil, sweat, etc. and the quality of the recording material is not impaired.
  • Dimethyl terephthalate forms needle crystals with a melting point of 140 ° C and a boiling point of 288 ° C; it is used as a raw material for the production of synthetic polyester fibers.
  • dimethyl isophthalate As a substance with a structure similar to that of dimethyl terephthalate, JP-A-5636/1978 describes dimethyl isophthalate as a sensitizer. But dimethyl isophthalate has a melting point of 67-68 ° C and a boiling point of 124 ° C, which are lower than the melting point and the boiling point of dimethyl terephthalate.
  • dimethyl isophthalate with such physical properties leads to the destabilization of a heat-sensitive recording sheet, thus to a loss in quality and to a greatly reduced productivity because the drying temperature at that after the coating is always limited to less than 67-68 ° C.
  • Crystal violet lactone blue
  • 3-diethylamino-6-methyl-7-anilinofluoran black
  • 3-diethylamino-6-methyl-7- (o, p-dimethylanilino) fluorine black
  • 3-pyrrolidino-6- methyl-7-anilinofluoran black
  • 3-diethylamino-7- (p-chloroanilino) fluoran black
  • 3-pyrolidino-6-methyl-7-anilinofluoran black
  • 3-piperidino-6-methyl-7-anilinofluoran black
  • Organic acids or phenolic substances such as bisphenol A (4,4'-isopropylidene diphenol), p-p '(1-methyl-n-hexylidene) diphenol, p-tertiary butylphenol, p-phenylphenol, novolak phenolic resins and p -Hydroxybenzoic acid benzyl ester used.
  • Such organic color developing agents are used alone or in a mixture, depending on the use and skills required.
  • the above-mentioned organic color developing agents, the colorless chromogenic dyes and dimethyl terephthalate are ground to a particle size of several microns or smaller by means of a milling device such as a ball mill, attritor, sand grinder, etc. or by means of a suitable emulsifying machine.
  • a milling device such as a ball mill, attritor, sand grinder, etc. or by means of a suitable emulsifying machine.
  • additives are added to this, depending on the intended use, in order to produce the coating color.
  • the additives that can be used according to the invention are e.g. B. the following:
  • Binders such as polyvinyl alcohol, modified polyvinyl alcohol, hydroxyethyl cellulose, methyl cellulose, starch, styrene-maleic anhydride copolymers, vinyl acetate-maleic anhydride copolymers. Styrene-butadiene copolymers, etc.; inorganic or organic fillers such as kaolin, baked kaolin, diatomaceous earth, talc, titanium dioxide, calcium carbonate, magnesium carbonate, aluminum hydroxide, etc.; Release agents such as metal salts of fatty acids: lubricants such as waxes, UV absorbers of the benzophenone and triazole series, waterproofing agents such as glyoxal, etc. dispersants. Antifoam, etc.
  • the amount of the dimethyl terephthalate of the present invention, and the kind and amount of the other ingredients, which are determined depending on the desired effect and suitability for recording purposes, are not particularly limited.
  • These coating colors were applied in a coating amount of 6.0 glm 2 on a base paper with a weight of 50 glm 2 , dried and supercalendered to set a smoothness of 200-300 seconds.
  • the heat-sensitive recording sheet using p-hydroxybenzoic acid benzyl ester as a color developing agent has a much higher residual image density after contamination with a castor oil than the comparative product.
  • Dimethyl terephthalate gives the product great stability against the effects of contaminated substances.

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)
  • Color Printing (AREA)

Claims (2)

1. Feuille d'enregistrement thermosensible munie d'une couche formatrice de couleur, contenant comme colorant chromogène basique incolore ou faiblement coloré, diméthyltéréphthalate, 3-pyrrolidino-6-méthyl-7-anilino-fluoranne, et, comme un agent organique développateur de couleur, au moins une substance appartenant au groupe suivant : bisphénol A (4,4'-isopropylidènediphénol), p,p'-(1-méthyl-n-hexylidène)-diphénol, p-tert-butylphénol, p-phénylphénols, résines phénoliques Novolaques et p-hydroxybenzoate de benzyle.
2. Feuille d'enregistrement thermosensible selon la revendication 1, caractérisée par le fait que la couche formatrice de couleur contient 3 à 10 parties en poids d'agent organique développateur de couleur, 1 à 5 parties en poids de diméthyl-téréphtalate, 1 à 20 parties en poids d'une charge, par rapport une part en poids de colorant chromogène précité, et 10 à 25 parties en poids d'un liant, par rapport à la teneur globale des substances solides.
EP82100773A 1981-02-06 1982-02-03 Feuille d'enregistrement thermosensible Expired - Lifetime EP0058345B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP15659/81 1981-02-06
JP56015659A JPS57129785A (en) 1981-02-06 1981-02-06 Heat sensitive recording paper

Publications (3)

Publication Number Publication Date
EP0058345A1 EP0058345A1 (fr) 1982-08-25
EP0058345B1 EP0058345B1 (fr) 1984-09-05
EP0058345B2 true EP0058345B2 (fr) 1991-08-14

Family

ID=11894856

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82100773A Expired - Lifetime EP0058345B2 (fr) 1981-02-06 1982-02-03 Feuille d'enregistrement thermosensible

Country Status (4)

Country Link
US (1) US4431706A (fr)
EP (1) EP0058345B2 (fr)
JP (1) JPS57129785A (fr)
DE (1) DE3260642D1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2526717B1 (fr) * 1982-05-14 1987-12-24 Mitsubishi Paper Mills Ltd Feuille d'enregistrement sensible a la chaleur
FR2550998B1 (fr) * 1983-08-24 1987-10-02 Kawasaki Kasei Chemicals Feuille d'enregistrement thermosensible
JPS6046293A (ja) * 1983-08-24 1985-03-13 Jujo Paper Co Ltd 感熱記録紙
JPS60151091A (ja) * 1984-01-20 1985-08-08 Fuji Photo Film Co Ltd 感熱記録材料の製造方法
US4675705A (en) * 1985-06-10 1987-06-23 Labelon Corporation Heat sensitive coating
JP2710160B2 (ja) * 1988-06-08 1998-02-10 王子製紙株式会社 感熱記録体
US5821196A (en) * 1997-04-10 1998-10-13 Appleton Papers Inc. Thermally-responsive record material
DE69804062T2 (de) * 1997-08-19 2002-11-28 Nippon Paper Industries Co. Ltd., Tokio/Tokyo Wärmeempfindliches Aufzeichnungsmedium des spontan farbenverändernden Typs
JP2000079758A (ja) * 1998-06-22 2000-03-21 Nippon Paper Industries Co Ltd 感熱記録体
GB0322907D0 (en) * 2003-09-30 2003-10-29 Arjo Wiggins Ltd Improvements in thermal paper

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4082156A (en) * 1976-07-01 1978-04-04 Caterpillar Tractor Co. Drive mechanism having separable housing
JPS5834310B2 (ja) * 1979-11-21 1983-07-26 保土谷化学工業株式会社 感熱記録紙
JPS5741994A (en) * 1980-08-28 1982-03-09 Dainippon Ink & Chem Inc Heat-sensitive recording sheet
JPS57116690A (en) * 1981-01-13 1982-07-20 Ricoh Co Ltd Thermal recording material
JPS57126693A (en) * 1981-01-29 1982-08-06 Ricoh Co Ltd Thermal recording sheet

Also Published As

Publication number Publication date
DE3260642D1 (en) 1984-10-11
JPS57129785A (en) 1982-08-11
EP0058345B1 (fr) 1984-09-05
US4431706A (en) 1984-02-14
EP0058345A1 (fr) 1982-08-25

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