EP0321388B1 - Ruban de colorant pour transfert de colorant par la chaleur - Google Patents

Ruban de colorant pour transfert de colorant par la chaleur Download PDF

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Publication number
EP0321388B1
EP0321388B1 EP19880730277 EP88730277A EP0321388B1 EP 0321388 B1 EP0321388 B1 EP 0321388B1 EP 19880730277 EP19880730277 EP 19880730277 EP 88730277 A EP88730277 A EP 88730277A EP 0321388 B1 EP0321388 B1 EP 0321388B1
Authority
EP
European Patent Office
Prior art keywords
layer
dye
cellulose nitrate
ink
ribbon
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
EP19880730277
Other languages
German (de)
English (en)
Other versions
EP0321388A1 (fr
Inventor
Wolfgang Dipl.-Ing. Beyer
Monika Dr Rer. Nat. Kohla
Manuela Schneider
Eduard Dr. rer. nat. Schütz
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.)
Siemens AG
Original Assignee
Siemens AG
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
Priority claimed from DE19873742924 external-priority patent/DE3742924A1/de
Priority claimed from DE19883817753 external-priority patent/DE3817753A1/de
Application filed by Siemens AG filed Critical Siemens AG
Priority to AT88730277T priority Critical patent/ATE71884T1/de
Publication of EP0321388A1 publication Critical patent/EP0321388A1/fr
Application granted granted Critical
Publication of EP0321388B1 publication Critical patent/EP0321388B1/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
    • B41M5/44—Intermediate, backcoat, or covering layers characterised by the 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
    • 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
    • Y10S428/914—Transfer or decalcomania
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31507—Of polycarbonate
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31786—Of polyester [e.g., alkyd, etc.]
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31786—Of polyester [e.g., alkyd, etc.]
    • Y10T428/3179—Next to cellulosic
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31801—Of wax or waxy material
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31971—Of carbohydrate

Definitions

  • the invention relates to an ink ribbon for dye transfer under the action of heat with a carrier layer, a color layer and an exothermic decomposable component which supports dye transfer when heat is supplied.
  • an ink layer applied to a carrier layer contains an aromatic azido compound which decomposes exothermically when heat is supplied by a thermal printhead with a reaction temperature in the range from 170 ° C to 200 ° C and thereby additional Delivers heat to soften the paint layer.
  • a heat-sensitive ink ribbon with hydrazone derivatives is known as an exothermically decomposable component in the ink layer or as an intermediate layer between the carrier layer and the ink layer; the decomposition temperature is in the range between 150 ° C and 200 ° C; the typical value for the released energy is 200 J / g.
  • the invention has for its object the decomposition temperature in an ink ribbon with an exothermic decomposable component to reduce even further and to increase the energy thereby released in order to be able to further reduce the drive energy for printing with this ink ribbon.
  • the component consists of cellulose nitrate, the decomposition temperature of which is set in the range between 100 ° C. and 150 ° C. by catalytic additives.
  • the main advantage of the ink ribbon according to the invention is that the cellulose nitrate decomposes explosively when the ink ribbon is heated locally in the area of the printing zone, thereby supplying additional heat to soften the ink layer, as well as a firm bond due to the gases released explosively when the cellulose nitrate decomposes the color on the recording medium to be printed.
  • the energy released during the local exothermic decomposition of the cellulose nitrate is, depending on the respective degree of nitration of the cellulose nitrate, in the order of magnitude of conventional explosives such as TNT or nitroglycerin, so that the color is pressed deeply into the recording medium by the kinetic energy of the gases released during the decomposition and in particular fills up surface depressions of the record carrier.
  • the decomposition temperature i.e. the temperature threshold at which the decomposition of the cellulose nitrate starts, is on the one hand well above the normal ambient temperature and the operating temperature of a printer, while on the other hand the printing temperature required for printing and thus the control energy required for a thermal print head is relatively low .
  • the cellulose nitrate is contained as a component in the ink layer in a heat-meltable ink layer.
  • the latter in the case of a release layer formed between the ink layer on the carrier layer, the latter consists of the cellulose nitrate.
  • the high specific decomposition energy of the cellulose nitrate advantageously allows the release layer to be made very thin, the cellulose nitrate itself forming the release layer and requiring no additional polymer as a binder. This results in a particularly sharp print image in thermal transfer printing because, due to the thinness of the release layer, its local decomposition area with respect to the heating area of the printing zone is defined with particularly sharp edges, for example by heating elements of a thermal print head or a heat radiation source.
  • the release layer decomposes completely in the region of its local heating, so that afterwards it is no longer possible for the color transferred to the recording medium to stick to the ink ribbon. It is therefore also not absolutely necessary to detach the ink ribbon from the recording medium immediately behind the printing zone, so that in connection with the ink ribbon according to the invention it is also possible to use thermal print heads which are only designed for use with ink ribbons without a release layer.
  • the release layer consisting of cellulose nitrate can be very easily applied from a solution to the carrier layer in the production of the ink ribbon according to the invention.
  • the cellulose nitrate preferably contains 1 to 20 percent by weight of amidosulfonic acid as a catalytic additive, as a result of which the decomposition temperature of the cellulose nitrate is significantly reduced from approximately 180 ° C. to 190 ° C. to approximately 130 ° C. to 140 ° C. A further reduction in the decomposition temperature to approximately 110 ° C. to 130 ° C. is advantageously achieved in that the cellulose nitrate as a catalytic additive has a weight of 1 to 20 percent toluene-4-sulfonic acid contains.
  • the ink ribbon 1 shown in Figure 1 has a carrier layer 2, which consists for example of polyethylene terephthalate or polycarbonate.
  • a color layer 3 is applied to the carrier layer 2, which contains dyes bound in waxes and / or thermoplastics and cellulose nitrate as an exothermic decomposable component.
  • the decomposition temperature of the cellulose nitrate is adjusted by catalytic additives such as, for example, organic acids and / or metal salts, to adapt to the heating capacity of various types of printer in which the ribbon 1 according to the invention is to be used.
  • amidosulfonic acid which is also known under the names amino-sulfuric acid or sulfamic acid, or toluene-4-sulfonic acid, also known as para-toluenesulfonic acid, are added to the cellulose nitrate as catalytic additives.
  • the decomposition temperature of the cellulose nitrate is reduced by these catalytic additives to approximately 130 ° to 140 ° C or 110 ° C to 130 °, the heat energy released as a function of temperature at catalyst concentrations below 10% being very sharp and steep, at higher catalyst concentrations wider .
  • the specific amount of heat and gas released during the decomposition of the cellulose nitrate depends on the selected degree of nitration of the cellulose nitrate, which is 10.9% to 12.2%; the specific decomposition energy achieved ranges from 500 J / g to 2000 J / g and is thus far above the values for the hydrazone derivatives given in US Pat. No. 4,525,722.
  • the amount of gas released is up to 70% of the amount of cellulose nitrate.
  • the ink ribbon 1 on its side formed by the carrier layer 2 in a manner not shown here is locally heated to a temperature above the decomposition temperature of the cellulose nitrate with the catalytic additives by heating elements of a thermal print head or a heat radiation source (laser) warmed up.
  • the cellulose nitrate decomposes explosively, releasing additional heat and releasing gases (CO2, CO, N2, H2).
  • the additional heat causes the ink layer 3 to melt, while the released gases bind the melted ink particles to the recording medium adjacent to the ink layer 3 with high kinetic energy.
  • the ink ribbon 4 shown in Figure 2 has a carrier layer 5, which consists for example of polyethylene terephthalate or polycarbonate.
  • the carrier layer 5 carries a release layer 6, which consists of cellulose nitrate and is applied from an organic solution such as butyl acetate, ethyl acetate or acetone.
  • the decomposition temperature of the release layer can also be adjusted, as described above for the exemplary embodiment according to FIG. 1, by catalytic additives, such as acids or metal salts, to adapt to the heating capacity of various types of printers in which the ink ribbon 4 is used, the temperature during the decomposition of the release layer 6 the amount of heat and gas released depends on the selected degree of nitration of the cellulose nitrate.
  • Adhesive layer 6 adheres to an ink layer 7, on which, during thermal transfer printing, a recording medium to be printed is guided past (not shown here) with the ink ribbon 4 interposed on a thermal printhead (also not shown) or a heat radiation source.
  • the color layer 7 contains dyes bound in waxes and / or thermoplastics.
  • the ink ribbon 4 is locally heated on its side formed by the carrier layer 5 in a manner not shown here by heating elements of the thermal print head or the heat radiation source to a temperature above the decomposition temperature of the release layer 6.
  • the release layer 6 decomposes explosively, releasing additional heat and releasing gases (CO2, CO, N2, H2).
  • the additional heat causes the ink layer 7 to melt, while the released gases bind the melted ink particles to the recording medium lying against the ink layer 7 with high kinetic energy. Since the release layer 6 decomposes almost completely in the region of its heating, the ink detached in this region can no longer stick to the ink ribbon 1 after the printing zone has cooled, so that a perfect ink transfer to the recording medium is ensured.

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)
  • Impression-Transfer Materials And Handling Thereof (AREA)
  • Decoration By Transfer Pictures (AREA)

Claims (5)

1. Ruban encreur (1; 4) pour le transfert d'une matière colorante sous l'action de la chaleur, comprenant une couche de support (2; 5), une couche de matière colorante (3; 7) et un constituant décomposable et assistant le transfert de la matière colorante, lors de l'apport de chaleur, caractérisé en ce que le constituant est en nitrate de cellulose dont le point de décomposition est réglé par des additifs catalytiques dans la plage comprise entre 100°C et 150°C.
2. Ruban encreur suivant la revendication 1, caractérisé en ce que, pour une couche de matière colorante fusible à chaud, le nitrate de cellulose est contenu en tant que constituant dans la couche de matière colorante (3).
3. Ruban encreur suivant la revendication 1, caractérisé en ce que, pour une couche de séparation (6) formée entre la couche de matière colorante (7) et la couche de support (5), la couche de séparation (6) est en nitrate de cellulose.
4. Ruban encreur suivant l'une des revendications précédentes, caractérisé en ce que le nitrate de cellulose contient, comme additif catalytique, de 1 à 20% en poids d'acide amidosulfonique.
5. Ruban encreur suivant l'une des revendications 1 à 3, caractérisé en ce que le nitrate de cellulose contient, comme additif catalytique, de 1 à 20% en poids d'acide toluène-4-sulfonique.
EP19880730277 1987-12-15 1988-12-08 Ruban de colorant pour transfert de colorant par la chaleur Expired - Lifetime EP0321388B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88730277T ATE71884T1 (de) 1987-12-15 1988-12-08 Farbband zur farbstoffuebertragung unter waermeeinwirkung.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3742924 1987-12-15
DE19873742924 DE3742924A1 (de) 1987-12-15 1987-12-15 Farbband zur farbstoffuebertragung unter waermeeinwirkung
DE3817753 1988-05-20
DE19883817753 DE3817753A1 (de) 1988-05-20 1988-05-20 Farbband zur farbstoffuebertragung unter waermeeinwirkung

Publications (2)

Publication Number Publication Date
EP0321388A1 EP0321388A1 (fr) 1989-06-21
EP0321388B1 true EP0321388B1 (fr) 1992-01-22

Family

ID=25862915

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880730277 Expired - Lifetime EP0321388B1 (fr) 1987-12-15 1988-12-08 Ruban de colorant pour transfert de colorant par la chaleur

Country Status (5)

Country Link
US (1) US4897310A (fr)
EP (1) EP0321388B1 (fr)
JP (1) JPH01196381A (fr)
AT (1) ATE71884T1 (fr)
DE (1) DE3868033D1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5156938A (en) * 1989-03-30 1992-10-20 Graphics Technology International, Inc. Ablation-transfer imaging/recording
DE3941303C1 (fr) * 1989-12-14 1990-12-13 Man Roland Druckmaschinen Ag, 6050 Offenbach, De
DE3941517A1 (de) * 1989-12-15 1991-06-27 Siemens Ag Thermotransferfarbband
US5945249A (en) * 1995-04-20 1999-08-31 Imation Corp. Laser absorbable photobleachable compositions
US5935758A (en) * 1995-04-20 1999-08-10 Imation Corp. Laser induced film transfer system
GB9617416D0 (en) * 1996-08-20 1996-10-02 Minnesota Mining & Mfg Thermal bleaching of infrared dyes
WO2005024908A2 (fr) * 2003-09-05 2005-03-17 Si2 Technologies, Inc. Articles de transfert laser et leurs procédés de fabrication

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1049399B (de) * 1950-11-01 1959-01-29 A. B. Dick Company, Nilcs, IU. (V. St. A.) Schablonenblatt mit Gcwebeunterlage und schablonierbarem Überzug für das Vervielfältigen mittels Wasser- oder Emulsionsfarben
US4491432A (en) * 1982-12-30 1985-01-01 International Business Machines Corporation Chemical heat amplification in thermal transfer printing
US4549824A (en) * 1983-12-30 1985-10-29 International Business Machines Corporation Ink additives for efficient thermal ink transfer printing processes
US4525722A (en) * 1984-02-23 1985-06-25 International Business Machines Corporation Chemical heat amplification in thermal transfer printing

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
CHEMICAL ABSTRACTS, Band 102, Nr. 11, 18. März 1985, Seite 514, Nr. 103644s, Columbus, Ohio, US; (KAMAYA KAGAKU KOGYO K.K.) 27-10-1984 *
CHEMICAL ABSTRACTS, Band 79, Nr. 19, 12. November 1973, Seite 341, Nr. 131371a, Columbus, Ohio, US; (JUJO PAPER MANUFACTURING CO., LTD and NIPPON TELEGRAPH AND TELEPHONE PUBLIC CORP.) 06-07-1973 *

Also Published As

Publication number Publication date
ATE71884T1 (de) 1992-02-15
JPH01196381A (ja) 1989-08-08
DE3868033D1 (de) 1992-03-05
EP0321388A1 (fr) 1989-06-21
US4897310A (en) 1990-01-30

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