EP0512696A1 - Matériel d'enregistrement thermosensible amélioré - Google Patents

Matériel d'enregistrement thermosensible amélioré Download PDF

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Publication number
EP0512696A1
EP0512696A1 EP92303356A EP92303356A EP0512696A1 EP 0512696 A1 EP0512696 A1 EP 0512696A1 EP 92303356 A EP92303356 A EP 92303356A EP 92303356 A EP92303356 A EP 92303356A EP 0512696 A1 EP0512696 A1 EP 0512696A1
Authority
EP
European Patent Office
Prior art keywords
undercoating
viscosity modifier
material according
layer
receiver stock
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Withdrawn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
EP92303356A
Other languages
German (de)
English (en)
Inventor
Maurice Wendell Lewis
Stephen Douglas 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 International Inc
Original Assignee
NCR International Inc
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 International Inc filed Critical NCR International Inc
Publication of EP0512696A1 publication Critical patent/EP0512696A1/fr
Withdrawn legal-status Critical Current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
    • B41M5/40—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
    • B41M2205/00—Printing methods or features related to printing methods; Location or type of the layers
    • B41M2205/04—Direct thermal recording [DTR]
    • 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
    • B41M5/423—Intermediate, backcoat, or covering layers characterised by non-macromolecular compounds, e.g. waxes
    • 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 present invention relates to a thermosensitive recording material.
  • a thermal printhead prints data by heating or energizing selective portions of a thermosensitive recording material having a thermosensitive layer which has been coated onto a receiver stock.
  • a problem with this type of thermal printing is that the heat applied to the thermosensitive layer can dissipate into the receiver stock. This results in an undesirably poor print quality due to an inadequate amount of heat being applied to the thermosensitive layer.
  • the thermal printhead In order to obtain an improved print quality, the thermal printhead must thermally energize the thermosensitive layer for a longer period of time. This results in a decrease in the useful life of the thermal printhead.
  • thermosensitive layer It is known to provide an undercoat, or insulating layer, between the receiver stock and the thermosensitive layer in order to inhibit the disipation of heat into the receiver stock.
  • the resulting images printed on the thermosensitive layer are darker, and so the sensitivity of the thermosensitive layer is increased.
  • known undercoat layers increases the sensitivity of the thermosensitive layer, the brightness and opaqueness of the receiver stock are disadvantageously restricted.
  • known undercoat layers are disadvantageous in that the thermosensitive layer can readily penetrate into the receiver stock.
  • thermosensitive recording material having a thermosensitive layer separated from a receiver stock by an undercoat layer and which can provide good brightness and opaqueness characteristics and also inhibit the penetration of the thermosensitive layer into the receiver stock.
  • thermosensitive recording material comprising a thermally reactive layer separated from a receiver stock by an undercoating layer, characterized in that said undercoating layer comprises a water resistant binder, a hollow sphere pigment and a viscosity modifier.
  • the invention is described further hereinafter, by way of example only, with reference to the accompanying drawing which is a sectional view of a base sheet of paper or receiver stock 10.
  • the receiver stock 10 may be any suitable stock which is capable of supporting an undercoating or subcoating 12 and a thermosensitive coating or layer 14.
  • subcoating means providing a subcoating 12 for a receiver stock 10 which improves the opaqueness, brightness, whiteness, and print density of the receiver stock 10 and also for inhibiting the penetration of the thermosensitive layer 14 into the receiver stock 10.
  • Example I is a composition which provides a subcoating 12 which could be used with any thermosensitive layer 14.
  • Subcoating 12 Material % Dry Range of % dry Binder 15 10-50 Pigment 77 35-85 Viscosity Modifier 8 1-20 100 ⁇
  • the binder is a carboxylated styrene-butadiene water resistant binder.
  • a suitable binder is the carboxylated SBR Emulsion known as 76 Res 4470.
  • the sources from which the various materials described herein are available are described below.
  • the pigment used in this Example I is a hollow sphere styrene-acrylic emulsion known as Ropaque OP-90.
  • the viscosity modifier is a polyvinyl alcohol which is soluble in water. Suitable viscosity modifiers are the polyviol LL-603 and PVA 107.
  • the binder, pigment and viscosity modifier were mixed together and coated on 45.6 gsm receiver stock 10 at 7.4 gsm (5.0 lbs/3300ft2).
  • the thermosensitive layer 14 was then coated on the subcoating 12 at 6.8 gsm (4.6 lbs/3300 ft2).
  • thermosensitive layer 14 is a composition as follows: Thermosensitive Layer 14 Material % Dry Range of % dry Water -- -- Leuco dye 10 5-15 Binder 10 5-15 Developer 20 15-25 Sensitizer 25 10-30 Fillers 30 25-40 Lubricants 5 1-10 100 ⁇
  • the Leuco dye was selected from the group consisting of S-205, PSD-150, N102, and ODB-2.
  • the ODB-2 dye was selected.
  • the binder was selected from the group consisting of polyvinyl alcohol, starch and its derivatives, CMC, methyl cellulose and ethyl cellulose (with water as the carrier).
  • the polyvinyl alcohol was selected.
  • the developer can consist of any suitable acid material, such as Bisphenol A or Bisphenol S.
  • Bisphenol A was selected.
  • the filler was selected from the group consisting of magnesium carbonate, calcium carbonate, silicone dioxide, or clays. In a preferred embodiment, the calcium carbonate and silicone dioxide were selected.
  • the lubricants was selected from the group consisting of zinc stearate and paraffin waxes. In a preferred embodiment, the zinc stearate was selected as the primary lubricant.
  • Example II shows another composition for a subcoating system.
  • the thermosensitive layer 14 is the same as that for Example I.
  • the subcoating 12 in this subcoating system has the following characteristics: Subcoating 12 Material % Dry Range Binder 15.0 10-50 Pigment 80 35-80 Viscosity Modifier 5 5-20 100 ⁇
  • the binder and pigment are the same as was used in Example I.
  • the viscosity modifier used in this Example II was selected from the group consisting of zinc stearate, sodium polyacrylate, paraffin wax emulsions, fumed silica, carboxy methyl cellulose, and Natrasol.
  • zinc stearate was selected.
  • the subcoating 12 was applied to a 45.6 gsm receiver stock 10 at 7.4 gsm (5.0 lbs/3300ft2).
  • the thermosensitive layer 14 was applied on the subcoating 12 at 6.9 gsm (4.0 lbs/3300 ft2) using conventional coating methods.
  • Example III only the thermosensitive layer 14 mentioned in Example I was applied on the 45.6 gsm receiver stock.
  • the coating weight was 6.4 gsm (4.3 lbs/3300 ft2)
  • a wax test procedure was also set up to test the ability of the subcoating 12 to inhibit the penetration of the thermosensitive layer 14 into the receiver stock 10.
  • a plurality of Dennison wax picks (not shown), manufactured by Dennison Mfg. Co. of Framingham, Massachusetts were used to test the penetration of the thermosensitive layer 14 into the receiver stock 10.
  • the test samples were prepared in accordance with Examples I, II and III, and the Dennison wax picks were melted and adhered to each sample. After the molten wax solidified, the wax was pulled away from the receiver stock. The degree to which the thermosensitive coating 14 came off with the wax indicated the degree to which the thermosensitive coating 14 penetrated the receiver stock.
  • thermosensitive coating 14 did not penetrate the test sample. Conversely, if the thermosensitive coating 14 did not come off of the test sample, then the thermosensitive coating 14 penetrated the test sample.
  • the wax picks have a Dennison rating from 2 to 26 which provides an indication of the degree to which the thermosensitive coating 14 penetrated the test sample. A number of wax picks having different ratings were used on each test sample until a wax pick was found that could remove the thermosensitive layer 14 from the test sample. If the Dennison rating was high, this indicated that it was more difficult to remove the thermosensitive layer 14 from the test sample, thereby indicating a higher amount of penetration by the thermosensitive layer 14 into the test sample.
  • thermosensitive layer 14 penetration test was as follows: TABLE 2 PENETRATION EXAMPLE I 2 EXAMPLE II 2 EXAMPLE III 10
  • the optical density of the test samples prepared in accordance with Examples I and II generally improved over the control sample of Example III.
  • a receiver stock 10 having the subcoating 12 coated thereon in accordance with Examples I and II improved the density of the characters printed on the receiver stock.
EP92303356A 1991-05-06 1992-04-14 Matériel d'enregistrement thermosensible amélioré Withdrawn EP0512696A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US69735391A 1991-05-06 1991-05-06
US697353 1991-05-06

Publications (1)

Publication Number Publication Date
EP0512696A1 true EP0512696A1 (fr) 1992-11-11

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP92303356A Withdrawn EP0512696A1 (fr) 1991-05-06 1992-04-14 Matériel d'enregistrement thermosensible amélioré

Country Status (4)

Country Link
EP (1) EP0512696A1 (fr)
FI (1) FI921990A (fr)
IE (1) IE921451A1 (fr)
NO (1) NO921770L (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2703950A1 (fr) * 1993-04-13 1994-10-21 Ricoh Kk Matériau d'enregistrement thermosensible.
EP0949087A1 (fr) * 1998-04-07 1999-10-13 Oji Paper Co., Ltd. Matériau pour l'enregistrement thermosensible pouvant être fixé par la chaleur
WO2000063294A1 (fr) * 1999-04-20 2000-10-26 Pca Hodgson Chemicals Pty. Ltd. Compositions hydrofuges, procedes et applications associees
DE102006032521B3 (de) * 2006-07-12 2008-04-03 Papierfabrik August Koehler Ag Wärmeempfindliches Aufzeichnungsmaterial

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0291315A2 (fr) * 1987-05-15 1988-11-17 Fuji Photo Film Co., Ltd. Papier d'enregistrement thermosensible
EP0334607A2 (fr) * 1988-03-23 1989-09-27 Fuji Photo Film Co., Ltd. Matériaux d'enregistrement thermosensible
EP0341715A2 (fr) * 1988-05-12 1989-11-15 Mitsubishi Paper Mills, Ltd. Matériaux pour l'enregistrement thermosensible
EP0361500A2 (fr) * 1988-09-29 1990-04-04 Mitsubishi Paper Mills, Ltd. Matériaux thermosensibles pour l'enregistrement
US4929590A (en) * 1989-03-02 1990-05-29 Ricoh Company, Ltd. Thermosensitive recording material

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0291315A2 (fr) * 1987-05-15 1988-11-17 Fuji Photo Film Co., Ltd. Papier d'enregistrement thermosensible
EP0334607A2 (fr) * 1988-03-23 1989-09-27 Fuji Photo Film Co., Ltd. Matériaux d'enregistrement thermosensible
EP0341715A2 (fr) * 1988-05-12 1989-11-15 Mitsubishi Paper Mills, Ltd. Matériaux pour l'enregistrement thermosensible
EP0361500A2 (fr) * 1988-09-29 1990-04-04 Mitsubishi Paper Mills, Ltd. Matériaux thermosensibles pour l'enregistrement
US4929590A (en) * 1989-03-02 1990-05-29 Ricoh Company, Ltd. Thermosensitive recording material

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2703950A1 (fr) * 1993-04-13 1994-10-21 Ricoh Kk Matériau d'enregistrement thermosensible.
EP0949087A1 (fr) * 1998-04-07 1999-10-13 Oji Paper Co., Ltd. Matériau pour l'enregistrement thermosensible pouvant être fixé par la chaleur
US6335306B1 (en) 1998-04-07 2002-01-01 Oji Paper Co., Ltd. Thermosensitive recording material of heat fixing type and method of fixing the same
EP1314574A1 (fr) * 1998-04-07 2003-05-28 Oji Paper Co., Ltd. Matériau pour l'enregistrement thermosensible pouvant être fixé par la chaleur et méthode pour le fixer
WO2000063294A1 (fr) * 1999-04-20 2000-10-26 Pca Hodgson Chemicals Pty. Ltd. Compositions hydrofuges, procedes et applications associees
DE102006032521B3 (de) * 2006-07-12 2008-04-03 Papierfabrik August Koehler Ag Wärmeempfindliches Aufzeichnungsmaterial

Also Published As

Publication number Publication date
NO921770L (no) 1992-11-09
IE921451A1 (en) 1992-11-18
NO921770D0 (no) 1992-05-05
FI921990A (fi) 1992-11-07
FI921990A0 (fi) 1992-05-04

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