EP0396356A1 - Wärmeempfindliches Aufzeichnungsmaterial - Google Patents

Wärmeempfindliches Aufzeichnungsmaterial Download PDF

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Publication number
EP0396356A1
EP0396356A1 EP19900304630 EP90304630A EP0396356A1 EP 0396356 A1 EP0396356 A1 EP 0396356A1 EP 19900304630 EP19900304630 EP 19900304630 EP 90304630 A EP90304630 A EP 90304630A EP 0396356 A1 EP0396356 A1 EP 0396356A1
Authority
EP
European Patent Office
Prior art keywords
weight
coating
record medium
polyvinyl alcohol
temperature modifier
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.)
Withdrawn
Application number
EP19900304630
Other languages
English (en)
French (fr)
Inventor
Maurice W. Lewis
Stephen D. Lakes
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.)
NCR Voyix Corp
Original Assignee
NCR Corp
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 NCR Corp filed Critical NCR Corp
Publication of EP0396356A1 publication Critical patent/EP0396356A1/de
Withdrawn legal-status Critical Current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
    • B41M5/30—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

Definitions

  • the present invention relates to a thermosensitive record medium.
  • thermal paper is used in direct printing operations.
  • the thermal printing systems use a thermal print element or a plurality of elements which are energized to heat specific and precise areas of a heat-sensitive coating on paper or like record material.
  • the heating of such specific and precise areas of the coating produces readable characters on the sheet of thermal paper.
  • the single sheet of paper contains the coating which reacts to the applied heat and is described as a self-­contained system.
  • the direct thermal paper systems have been used in producing bar code images, graphic images, instrument recording displays, and communication imaging as in facsimile equipment.
  • the use of certain ingredients in the thermally sensitive coating on the paper is desired to provide clear and well-defined characters and/or images. It is also desired to obtain such characters and/or images with lower energy levels, as in the case of facsimile operation.
  • Prior art materials used in thermal coating compositions included P-Benzyl Bisphenol, Ethylene Glycol M-Tolyl Ether, and 2-Naphthyl Benzyl Ether.
  • An object of the present invention is to provide a thermosensitive record medium having a composition including a temperature modifier to permit lower temperature operating conditions.
  • a further object of the present invention is to provide a coating formulation for thermal paper providing enhanced smear characteristics and improved background whiteness.
  • thermosensitive record medium including a substrate and a thermally reactive coating thereon which includes a reactive material of the phenol group, a thermochromic dye and a temperature modifier material in a polyvinyl alcohol binder, characterized in that said temperature modifier material is selected from the group comprising methyl-p-nitro benzoate, ethyl p-­nitro benzoate and isobutyl-p-nitro benzoate.
  • thermosensitive record medium including a substrate and a thermally reactive coating thereon which includes a reactive material of the phenol group, a thermochromic dye and a temperature modifier material in a polyvinyl alcohol binder characterized in that said coating includes 14 to 27% by weight phenolic resin, 6 to 12% by weight thermochromic dye, 1 to 5% by weight paraffin wax emulsion, 14 to 27% by weight temperature modifier, and 9 to 27% by weight polyvinyl alcohol binder, said temperature modifier being selected from the nitro benzoate group.
  • the thermal paper 10 includes a substrate 12 on which is coated a heat-sensitive coating 14.
  • the coating 14 includes essential ingredients as a phenolic resin 16, an opaque dye 18, a temperature modifier 20, a filler 22, and a binder 24. Certain of the ingredients, of lesser percentage amounts, are not shown so as to provide clarity in the drawing.
  • a thermal print head 26 of appropriate design is used in the printing operation.
  • the substrate 12 is preferably paper, however, substitutes may include polyester film, polypropylene, polyethlene or other synthetic materials.
  • Example I is a composition of ingredients which are included in the coating of the present invention.
  • the polyvinyl alcohol (PVA) is a water-­soluble polymer used as a binder for the various essential ingredients in the coating 14.
  • the PVA at 12% provides an initial binder for the various ingredients in the coating 14, and the PVA at 18% provides a supplemental binder and dispersant for these various ingredients in the coating.
  • the Nopco NDW is a defoamer of the glycol group.
  • Dispex N-40 is a neutral sodium salt of a polycarboxylic acid and is used as a dispersing agent.
  • Niaproof 08 is a sodium 2-ethylhexyl sulfate used as a wetting agent.
  • Bisphenol A (4, 4-isopropylidenedi-phenol) is a reactive material of the phenol group.
  • Methyl-p-nitro benzoate acts as a solubilizer and is used as a preferred temperature modifier in the coating to allow lower energy levels and lower temperature operation of the thermal elements in the thermal printing operation.
  • Other temperature modifiers such as ethyl-­p-nitro benzoate and isobutyl-p-nitro benzoate can be substituted in similar percentage amounts in the coating 14 as are the amounts of the preferred temperature modifier.
  • the paraffin wax emulsion is a substantially permanent mixture of two liquids which do not normally dissolve in each other but which are held in suspension, one in the other.
  • the paraffin wax is remaining after the emulsifying process.
  • the wax is used as a lubricant and as a calender aid.
  • Calcium carbonate is a filler.
  • Sylox 2 is a silica, identified as silicon dioxide in white tasteless powder form, is insoluble in water and certain acids, and is soluble in molten alkali when finely divided and amorphous.
  • Silica is used as a filler and a smear suppressant.
  • Zinc stearate is used as a filler, a water repellent, and a lubricant or anti-stick agent.
  • the opaque dye is thermochromic in nature and may be any one of the fluoran family. These opaque dyes may be identified as Pergascript, PSD-150, ODB-2, TH-107, N-102, or S-205 black dye. Tinopal is a fluorescent brightener. The methyl-p-nitro benzoate in conjunction with the bisphenol A, the opaque dye, and the PVA binder provide an acceptable image on low energy Group 3 facsimile machines.
  • the coating is aqueous based and can be applied in an amount from 2.0 to 6.0 pounds dry weight per 3300 square feet and then dried in a typical coater oven at a temperature and for a period of time to drive off the moisture but not at a sufficient temperature and time so as to develop the coating. Typical speeds of the coater can be from 500 to 1500 feet per minute.
  • the paper or other substrate may have a weight in the range of 13 to 137 pounds per 3300 square feet.
  • the first grind in the preparation of the coating 14 includes the dye, the 12% polyvinyl alcohol and the 18% polyvinyl alcohol, the NOPCO NDW, and the Niaproof 08.
  • the second grind includes the PVA's, the NOPCO NDW, the Niaproof 08, and the remaining ingredients. The two grinds are then mixed in proper proportions to produce the coating 14.
  • the coating includes ingredients which provide enhanced smear and background whiteness characteristics and also which provide a superior reaction for image density and stability.

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)
EP19900304630 1989-04-27 1990-04-27 Wärmeempfindliches Aufzeichnungsmaterial Withdrawn EP0396356A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US34525889A 1989-04-27 1989-04-27
US345258 1989-04-27

Publications (1)

Publication Number Publication Date
EP0396356A1 true EP0396356A1 (de) 1990-11-07

Family

ID=23354248

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900304630 Withdrawn EP0396356A1 (de) 1989-04-27 1990-04-27 Wärmeempfindliches Aufzeichnungsmaterial

Country Status (2)

Country Link
EP (1) EP0396356A1 (de)
JP (1) JPH02299879A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2153986C2 (ru) * 1996-04-23 2000-08-10 Хорселл Грэфик Индастриз Лимитед Термочувствительная композиция и способ ее применения для изготовления литографической печатной формы
US6685094B2 (en) * 1997-12-06 2004-02-03 Jon Cameron Thermochromic bar code

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0306344A2 (de) * 1987-09-03 1989-03-08 Appleton Papers Inc. Wärmeempfindliches Aufzeichnungsmaterial

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0306344A2 (de) * 1987-09-03 1989-03-08 Appleton Papers Inc. Wärmeempfindliches Aufzeichnungsmaterial

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 12, no. 376 (M-750)(3223) 07 October 1988, & JP-A-63 126784 (TOMOEGAWA PAPER COMPANY LIMITED) 30 May 1988, *
PATENT ABSTRACTS OF JAPAN vol. 13, no. 22 (M-786)(3370) 19 January 1989, & JP-A-63 231983 (SHOWA DENKO K.K.) 28 September 1988, *
PATENT ABSTRACTS OF JAPAN vol. 13, no. 229 (M-831)(3577) 26 May 1989, & JP-A-01 42277 (RICOH COMPANY LIMITED) 14 February 1989, *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2153986C2 (ru) * 1996-04-23 2000-08-10 Хорселл Грэфик Индастриз Лимитед Термочувствительная композиция и способ ее применения для изготовления литографической печатной формы
US6685094B2 (en) * 1997-12-06 2004-02-03 Jon Cameron Thermochromic bar code

Also Published As

Publication number Publication date
JPH02299879A (ja) 1990-12-12

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Inventor name: LAKES, STEPHEN D.

Inventor name: LEWIS, MAURICE W.

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