EP0124616A1 - Ruban a encre thermo-sublimable - Google Patents

Ruban a encre thermo-sublimable Download PDF

Info

Publication number
EP0124616A1
EP0124616A1 EP83903408A EP83903408A EP0124616A1 EP 0124616 A1 EP0124616 A1 EP 0124616A1 EP 83903408 A EP83903408 A EP 83903408A EP 83903408 A EP83903408 A EP 83903408A EP 0124616 A1 EP0124616 A1 EP 0124616A1
Authority
EP
European Patent Office
Prior art keywords
weight
parts
dye
ink
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.)
Granted
Application number
EP83903408A
Other languages
German (de)
English (en)
Other versions
EP0124616B1 (fr
EP0124616A4 (fr
Inventor
Yoshio Sony Chemicals Corporation Fujiwara
Junetsu Sony Corporation Research Center Seto
Shigemichi Honda
Naotake Sony Chemicals Corporation Kobayashi
Tetsuya Sony Chemicals Corporation Abe
Satoru Sony Chemicals Corporation Shinohara
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.)
Sony Corp
Original Assignee
Sony 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 Sony Corp filed Critical Sony Corp
Publication of EP0124616A1 publication Critical patent/EP0124616A1/fr
Publication of EP0124616A4 publication Critical patent/EP0124616A4/fr
Application granted granted Critical
Publication of EP0124616B1 publication Critical patent/EP0124616B1/fr
Expired legal-status Critical Current

Links

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
    • B41M5/382—Contact thermal transfer or sublimation processes
    • B41M5/3825—Electric current carrying heat transfer sheets
    • 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
    • B41M5/382—Contact thermal transfer or sublimation processes
    • B41M5/392—Additives, other than colour forming substances, dyes or pigments, e.g. sensitisers, transfer promoting agents

Definitions

  • the present invention relates to a dye carrier ink ribbon for a sublimation transfer type hard copy, which is used to make a color picture image on a printing paper by thermally transferring the dye selectively from the carrier ink ribbon to the printing paper.
  • a color copying method has hitherto been proposed that a dye carrier ink ribbon in which an ink formed by dissolving and dispersing a sublimable dye into resin and solvent is coated on a thin heat resisting sheet such as paper or the like is used and which is heated from its back side by a thermal print head to thereby sublimate only the dye contained in the ink, so that the dye is transferred on a printing paper coated on its surface with a resin of excellent dye absorbing property such as polyester resin to form a color picture image.
  • the dye carrier ink ribbon used in this color copying method was requested to be capable of efficiently sublimating the dye on the printing paper so that the coloring concentration of picture image is increased to obtain a clear picture image of high contrast and that heat energy applied to the thermal print head of printer is reduced to decrease power consumption and the burden of thermal print head, the life of thermal print head being lengthened.
  • the dye carrier ink ribbon used in this color copying method is requested to be capable of efficiently sublimating the dye and to be prevented from being melt bonded by heat on a coating composition coated on the printing paper.
  • the present invention relates to a dye carrier' ink ribbon for a sublimation transfer type hard copy formed of a base sheet having heat resisting property and an ink containing sublimable dye formed on the surface of the base sheet.
  • the ink is formed of a sublimable dye, a binder and 30 to 200 parts by weight of powder of high thermal conductivity insoluble to a solvent uniformly dispersed into totally 100 parts by weight of the sublimable dye and the binder.
  • the sublimable dye can efficiently be sublimated and transferred on the printing paper by heat and the melt bonding between the dye carrier ink ribbon and the printing paper is avoided.
  • An ink used in a color copying method of sublimation transfer type is generally prepared by mixing a sublimable dye and a binder resin containg in a curable resin and a solvent added with small amount of a dispersion agent and a lubricant. If necessary, for the purpose of improving the printing property and of adjusting viscpsity, about 10 parts by weight of inorganic fine particle is sometimes added to the ink binder.
  • the present inventor has found out that the dye carrier ink ribbon formed by coating on a base sheet having heat resisting property such as a paper or the like an ink in which as much as 30 to 200 parts by weight of inorganic powder having excellent thermal conductivity, and insoluble to a solvent of the ink are dispersed for 100 parts by weight of the sublimable dye and the binder is considerably effective for particularly the color copying method.-
  • a base sheet having heat resisting property such as a paper or the like an ink in which as much as 30 to 200 parts by weight of inorganic powder having excellent thermal conductivity, and insoluble to a solvent of the ink are dispersed for 100 parts by weight of the sublimable dye and the binder is considerably effective for particularly the color copying method.
  • an ink was formed with a mixing 4 parts by weight of SUMIKAPLAST BLUE S35 (manufactured by Sumitomo Chemical Co., Ltd.) as a sublimable dye, 6 parts by weight of acetate cellulose (manufactured by Daicel Ltd.) as a binder and 90 parts by weight of methyl ethyl ketone as a solvent.
  • experiments 1 to 8 were carried out in which silica (AEROSIL R972, manufactured by Nippon Aerosil Co., Ltd.) was mixed into the above ink with various mixing ratios within the upper limit of 250 parts by weight relative to totally 100 parts by weight of the sublimable dye and the binder.
  • the mixed compositions were dispersed by a ball mill for one day and coated on a condenser paper of 25 ⁇ thickness to have a coating amount of 3 g/m 2 after being dried thus dye carrier ink ribbons being formed.
  • the dye carrier ink ribbon was heated at its back side by controlling the current of the thermal print head to gradually lower the temperature from 300°C at maximum so that the sublimated amount of dye was changed and at the same time, the printing paper and the dye carrier ink ribbon were moved to thereby form a gradation picture image.
  • the melt bonded condition between the ink robbon and the printing paper and the finished condition of the intermediate gradation after the printing were observed. Also; the coloring concentration of cyan at the highest concentration portion of the gradation picture image formed on the printing paper was measured by a Macbeth reflection density meter.
  • the dye carrier ink ribbon and the printing paper after printing were completely melt bonded with each other (hereinafter, simply described as “melt bonding”).
  • the melt bonding and roughened finish were frequently found out in the finished intermediate gradation of the coloring concentration.
  • the gradation picture image was melt bonded at its high concentration portion, the finished intermediate gradation was frequently roughened and the coloring concentration was 1.31.
  • experiments-9 to -14 in which the mixed particle was not limited to silica but heat conductive powder particles were added were carried out by the present inventor. These experiments were carried out as follows.
  • This ink was then coated on a rice paper of area weight of 20 g/m 2 so as to have a coating weight of 3 g/m 2 after being dried and thereafter heated for 3 minutes at 80°C and for one hour at 100°C to harden the binder resin thus a dye carrier ink ribbon was formed.
  • the experiments-9 to -14 in which the powder particle of excellent heat conductivity to be added was changed and the mixing ratio thereof was changed were carried out and the experimental results indicated on table 2 were obtained.
  • the same terms as those on the table-1 were used for the coloring concentration, the finished intermediate gradation and the melt bonding.
  • Heat generated by the thermal print head is conducted through the sheet having heat resisting property, which forms the base of the ink ribbon, to the ink layer to heat the dye to its sublimation starting temperature whereby a picture image is formed by sublimating and transferring the dye from the ink ribbon to the surface of the printing paper.
  • the heat generated by the thermal print head must instantaneously be conducted to the ink layer effectively. From these experiments, it was understood that when the thermal conductive powder particles were dispersed with high concentration in the ink, the heat conducted through the heat resisting sheet was effectively conducted into the ink to rapidly start the sublimation of the sublimable dye contained in the ink. The effect of the present invention can not be achieved by only increasing the thermal conductivity of the ink ribbon.
  • the heat of the thermal print head is increasingly conducted in the lateral direction so that the ink is not heated effectively thus the sublimation property of the dye being lowered.
  • the powder particles dispersed with high concentration in the ink of the present invention partially contact with each other, in which when the particle is dominantly heated, the dye dispersed and adsorbed in the periphery of the particle can effectively be heated and sublimated.
  • the conductions of heat in the lateral and thickness directions were not so different from each other so that the ink ribbon of excellent sublimation property and of high resolution could be obtained.
  • the present invention is more effective if the coating surface of the ink ribbon according to the experimental example of the present invention is made concave and convex in a quite small area by highly packed powder particle with the result that the surface area of the ribbon is increased. Accordingly, since a space in which the dye heated by the conducted heat can be sublimated was increased, the amount of dye transferred on the surface of the printing paper was increased and thus the picture image of excellent coloring property was obtained.
  • the concave and convex portions formed on the surface of the ink ribbon of the present experimental examples lower the contact area with the printing paper, there is then an effect that the ink ribbon and the printing paper can be prevented from being melt bonded by heat with each other.
  • the heat of the thermal print head was effectively conducted by the powder particle of excellent thermal conductivity packed with high concentration into the ink and the sublimation space was increased by the concave an ⁇ .
  • the convex portions formed on the surface of the ink ribbon to increase the sublimation efficiency so that even when a heat resisting property resin of poor sublimation efficiency for the prior art ribbon was used, a picture image of enoughly high coloring concentration could be formed on the printing paper.
  • the particles do not contact with one another sufficiently and the surface of the ink ribbon is not formed to have quite small concave and convex portions so that the heat can not be conducted effectively. Also, since the sublimation space is small, the sublimation efficiency can not be increased sufficiently. In addition, the melt bonding phenomenon between the ink ribbon and the printing paper is frequently caused and the melt bonding occurred particularly on the intermediate gradation area can not e avoided.
  • the adding amount exceeds 200 parts by weight, the powder particle is transferred to the side of the printing paper upon printing, and the dye concentration is reduced too much and thus the coloring concentration becomes insufficient.
  • the diameter of the powder particle is preferably selected to be less than 100 p, more preferably in a range from 10 mu to 10 ⁇ .
  • Resin with a mixed ratio of 10 parts by weight of ethyl cellulose, 10 parts by weight of rapid-curing type melamine resin and 0.2 parts by weight of paratoluene sulfonic acid was mixed with a sublimable dye PS Blue RR (manufactured by Mitsui Toatsu Chemicals, Inc.) so as to satisfy the mixing ratios of the binder to the sublimable dye being 3:1, 3:2 and 3:3. Then, the mixture was diluted by methyl ethyl ketone to 10%.
  • the above ink was coated on a condenser paper of area weight of 20 g/m 2 in such a manner that the thickness of the ink coating was changed so as to make the dyes in the constant area substantially same between the ink ribbons containing different amount of powder after being dried.
  • the measured value represents the cyan concentration measured by the Macbeth reflection density meter.
  • the mixing ratio of the sublimable dye and the resin was selected to be 1:3, when the adding amount of the powder particle relative to 100 parts by weight of the sublimable dye and the resin was selected to be 0 parts by weight., the cyan concentration at the highest concentration portion was 0.98, when it was selected to be 30 parts by weight, the cyan concentration at the highest concentration portion was 1.48 and when it was selected to be 70 parts by weight,: the cyan concentration at the highest concentration portion was 1.50.
  • the mixing ratio of the sublimable dye and the resin was selected to be 2:3, when the adding amount of the powder particle relative to 100 parts by weight of the sublimable dye and the resin was selected to be 0 parts by weight, the cyan concentration at the highest concentration portion was 1.23, when it was selected to be 30 parts by weight, the cyan concentration at the highest concentration portion was 1.60 and when it was selected to be 70 parts by weight, the cyan concentration at the highest concentration portion was 1.65.
  • the mixing ratio of the sublimable dye and the resin was selected to be 3:3, when the adding amount of the powder particle relative to 100 parts by weight of the sublimable dye and the resin was selected to be 0 parts by weight, the cyan concentration at the highest concentration portion was 1.35, when it was selected to be 30 parts by weight, the cyan concentration at the highest concentration portion was 1.72 and when it was selected to be 70 parts by weight, the cyan concentration at the highest concentration portion was 1.76.
  • the dye carrier ink ribbon formed by coating on the surface of the base sheet having heat resisting property the ink in which 30 to 200 parts by weight of particle of high-thermal conductivity and insoluble to the solvent were dispersed into totally 100 parts by weight of the ink formed of the sublimable dye and the binder, particularly the sublimable dye can efficiently be sublimated and transferred on the printing paper by a small amount of heat and it is possible to prevent the ink ribbon and the printing paper from being melt bonded with each other by heat.
  • the powder particle of excellent thermal conductivity and insoluble to the solvent which is used in the present invention is not limited to inorganic powder particle such as titanium oxide, zinc oxide, calcium carbonate, barium sulfate, aluminium oxide, silica, clay, magnesium oxide, tin oxide, silicone carbide, beryllia, glass powder and the like but may be metal powder such as iron powder, copper powder, aluminium powder and the like and carbide such as graphite, carbon and the like. Since these - powder particles have high thermal conductivity as compared with the heat resisting plastic sheet or paper which becomes the base material of the ink ribbon, and the resin contained as the binder, the heat conducted from the thermal print head can effectively be conducted into the ink.
  • inorganic powder particle such as calcium carbonate, clay, silica or the like
  • metal powder such as iron powder, aluminium powder and the like and carbon
  • short fibre-like and phosphor piece-like powders may be added to the ink with a small amount which does not lower the printing property.

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)
  • Impression-Transfer Materials And Handling Thereof (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)

Abstract

Un ruban à encre thermo-sublimable comprend une feuille de support thermo-résistante et une encre thermo-sublimable formée sur la surface de la feuille de support. L'encre comprend une encre sublimable, un liant, et de 30 à 200 parties en poids, par 100 parties en poids de la somme de la substance colorante et du liant, de particules insolubles dans le solvant possédant une conductivité thermique élevée et dispersées uniformément dans le liant et dans la matière colorante. L'utilisation de ce ruban permet d'obtenir un transfert efficace par sublimation de la substance colorante sous l'effet d'une faible chaleur et empêche le soudage entre le ruban et le papier d'impression sous l'effet de la chaleur.
EP19830903408 1982-10-29 1983-10-25 Ruban a encre thermo-sublimable Expired EP0124616B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP57190189A JPS5979788A (ja) 1982-10-29 1982-10-29 熱昇華性インクリボン
JP190189/82 1982-10-29

Publications (3)

Publication Number Publication Date
EP0124616A1 true EP0124616A1 (fr) 1984-11-14
EP0124616A4 EP0124616A4 (fr) 1985-06-06
EP0124616B1 EP0124616B1 (fr) 1988-05-11

Family

ID=16253929

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19830903408 Expired EP0124616B1 (fr) 1982-10-29 1983-10-25 Ruban a encre thermo-sublimable

Country Status (4)

Country Link
EP (1) EP0124616B1 (fr)
JP (1) JPS5979788A (fr)
DE (1) DE3376541D1 (fr)
WO (1) WO1984001746A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0283025A2 (fr) * 1987-03-18 1988-09-21 Toppan Printing Co., Ltd. Matériel pour le transfert thermique, matériel pour l'enregistrement et méthode pour l'enregistrement par transfert thermique l'utilisant
EP0623478A2 (fr) * 1993-05-07 1994-11-09 Minnesota Mining And Manufacturing Company Feuilles donneurs de métal pour le procédé de transfert de masse en fusion
US5670449A (en) * 1995-10-30 1997-09-23 Eastman Kodak Company Dye-donor element containing elastomeric beads for thermal dye transfer
EP0620120B1 (fr) * 1988-06-06 1999-03-17 Oki Electric Industry Co., Ltd. Ruban d'encre

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59131495A (ja) * 1983-01-18 1984-07-28 Matsushita Electric Ind Co Ltd 染料転写体
JPS604573A (ja) * 1983-06-23 1985-01-11 Matsushita Electric Ind Co Ltd インキ組成物
JPS60229794A (ja) * 1984-04-27 1985-11-15 Matsushita Electric Ind Co Ltd 転写型感熱記録方法
JPS60229793A (ja) * 1984-04-27 1985-11-15 Matsushita Electric Ind Co Ltd 染料転写体
JPS60229789A (ja) * 1984-04-27 1985-11-15 Matsushita Electric Ind Co Ltd 染料転写体
JPS60229795A (ja) * 1984-04-27 1985-11-15 Matsushita Electric Ind Co Ltd 感熱記録用転写体
JPS60240494A (ja) * 1984-05-15 1985-11-29 Matsushita Electric Ind Co Ltd 感熱記録用転写体
JPS60240495A (ja) * 1984-05-15 1985-11-29 Matsushita Electric Ind Co Ltd 感熱記録用転写体
JPH0729500B2 (ja) * 1984-08-23 1995-04-05 松下電器産業株式会社 熱転写記録用転写体
JPS61123589A (ja) * 1984-11-21 1986-06-11 Matsushita Electric Ind Co Ltd 熱転写記録シート
JPS61137782A (ja) * 1984-12-10 1986-06-25 Matsushita Electric Ind Co Ltd 熱転写記録装置
JPS61175090A (ja) * 1985-01-31 1986-08-06 Matsushita Electric Ind Co Ltd 感熱記録用転写体
JPH0714664B2 (ja) * 1985-05-10 1995-02-22 松下電器産業株式会社 黒色熱転写記録シ−ト
JPH0777831B2 (ja) * 1985-07-24 1995-08-23 松下電器産業株式会社 染料転写体
JPH07106676B2 (ja) * 1985-07-24 1995-11-15 松下電器産業株式会社 転写型感熱記録方法
JPH0798426B2 (ja) * 1985-09-18 1995-10-25 大日本印刷株式会社 熱転写シ−ト
US4700207A (en) * 1985-12-24 1987-10-13 Eastman Kodak Company Cellulosic binder for dye-donor element used in thermal dye transfer
JP2506619B2 (ja) * 1986-09-06 1996-06-12 大日本印刷株式会社 熱転写方法
JP2598261B2 (ja) * 1987-03-25 1997-04-09 大日本印刷株式会社 熱転写方法、被熱転写シート及び熱転写シート
JP2621078B2 (ja) * 1987-06-03 1997-06-18 大日本印刷株式会社 熱転写シートの製造方法
US4836106A (en) * 1987-10-30 1989-06-06 International Business Machines Corporation Direct offset master by resistive thermal printing
JP2881438B2 (ja) * 1988-09-16 1999-04-12 株式会社リコー 昇華型熱転写記録媒体
JP2843575B2 (ja) * 1988-09-27 1999-01-06 株式会社リコー 昇華型熱転写体
CA2072758A1 (fr) * 1990-09-14 1992-03-15 Kenneth Francis Buechler Anticorps liant aux complexes de recepteurs de ligands et de ligands et leur utilite dans les tests ligand-recepteur
JP2618369B2 (ja) * 1994-10-03 1997-06-11 大日本印刷株式会社 記録シート

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0063000A2 (fr) * 1981-03-31 1982-10-20 Fujitsu Limited Compositions d'encre et feuilles d'encre pour des procédés d'enregistrement thermographiques dits par transfert

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4879017A (fr) * 1972-01-29 1973-10-23
JPS5299109A (en) * 1976-02-16 1977-08-19 Reiko Kk Transfer foil
JPS5519533A (en) * 1978-07-28 1980-02-12 Dainippon Printing Co Ltd Sheet and process for sublimation transfer
JPS56109787A (en) * 1980-02-05 1981-08-31 Fuji Kagakushi Kogyo Co Ltd Heat-sensitive transferring ink ribbon
JPS56164891A (en) * 1980-05-24 1981-12-18 Nippon Telegr & Teleph Corp <Ntt> Heat sensitive transfer ink

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0063000A2 (fr) * 1981-03-31 1982-10-20 Fujitsu Limited Compositions d'encre et feuilles d'encre pour des procédés d'enregistrement thermographiques dits par transfert

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO8401746A1 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0283025A2 (fr) * 1987-03-18 1988-09-21 Toppan Printing Co., Ltd. Matériel pour le transfert thermique, matériel pour l'enregistrement et méthode pour l'enregistrement par transfert thermique l'utilisant
EP0283025A3 (en) * 1987-03-18 1990-04-25 Toppan Printing Co., Ltd. Thermal transfer material, recording material and thermal transfer recording method using the same
US5019452A (en) * 1987-03-18 1991-05-28 Toppan Printing Co., Ltd. Thermal transfer material
EP0620120B1 (fr) * 1988-06-06 1999-03-17 Oki Electric Industry Co., Ltd. Ruban d'encre
EP0623478A2 (fr) * 1993-05-07 1994-11-09 Minnesota Mining And Manufacturing Company Feuilles donneurs de métal pour le procédé de transfert de masse en fusion
EP0623478A3 (fr) * 1993-05-07 1996-07-17 Minnesota Mining & Mfg Feuilles donneurs de métal pour le procédé de transfert de masse en fusion.
US5670449A (en) * 1995-10-30 1997-09-23 Eastman Kodak Company Dye-donor element containing elastomeric beads for thermal dye transfer

Also Published As

Publication number Publication date
JPS5979788A (ja) 1984-05-09
EP0124616B1 (fr) 1988-05-11
EP0124616A4 (fr) 1985-06-06
WO1984001746A1 (fr) 1984-05-10
JPH0471718B2 (fr) 1992-11-16
DE3376541D1 (en) 1988-06-16

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