EP0228294B1 - Rubans encreurs - Google Patents

Rubans encreurs Download PDF

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Publication number
EP0228294B1
EP0228294B1 EP19860310159 EP86310159A EP0228294B1 EP 0228294 B1 EP0228294 B1 EP 0228294B1 EP 19860310159 EP19860310159 EP 19860310159 EP 86310159 A EP86310159 A EP 86310159A EP 0228294 B1 EP0228294 B1 EP 0228294B1
Authority
EP
European Patent Office
Prior art keywords
dye
dye carrier
binder resin
weight
resin
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
Application number
EP19860310159
Other languages
German (de)
English (en)
Other versions
EP0228294A3 (en
EP0228294A2 (fr
Inventor
Tetsuya Abe
Naotake Kobayashi
Satoru Shinohara
Naoki Sugai
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 EP0228294A2 publication Critical patent/EP0228294A2/fr
Publication of EP0228294A3 publication Critical patent/EP0228294A3/en
Application granted granted Critical
Publication of EP0228294B1 publication Critical patent/EP0228294B1/fr
Expired 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
    • B41M5/382—Contact thermal transfer or sublimation processes
    • B41M5/392—Additives, other than colour forming substances, dyes or pigments, e.g. sensitisers, transfer promoting agents
    • B41M5/395—Macromolecular additives, e.g. binders

Definitions

  • This invention relates to dye carrier ribbons, and in particular to such ribbons for hard copy sublimation transfer, which may be used for making a hard copy of an image picked up by a video camera or a television picture image on printing paper by thermal transfer of sublimable dyes.
  • hard copies may be obtained by thermal transfer printing by superposing a dye carrier ribbon having a colorant layer, in which sublimable dyes are contained, on to printing paper, and heating the ribbon according to a pattern corresponding to image information, for example, image information picked up by a video camera or television picture image information, thereby causing the sublimable dyes to be transferred to the printing paper.
  • a printer for obtaining a hard copy by thermal transfer printing.
  • the printer has a platen 2 around which printing paper 1 is wound and which is rotated in the direction of an arrow a , and a heating head 4 arranged to press a dye carrier ribbon 3 against the platen 2 and the printing paper 1.
  • a heating head 4 arranged to press a dye carrier ribbon 3 against the platen 2 and the printing paper 1.
  • heating elements 4a At the tip of the heating head 4 are arranged heating elements 4a corresponding to the number of required picture elements, which in turn correspond to the number of elements in one scanning line of, for example, a television picture image.
  • the dye carrier ribbon 3 sandwiched under pressure between the heating head 4 and the printing paper 1 has a sheet substrate 9 on which there are formed colorant layers in a form corresponding, for example, to the frame of a television picture image, and which each contain a respective one of four sublimable dyes which are yellow, magenta, cyan and black in colour.
  • the respective colorant layers including yellow Y, magenta M, cyan C and black B are successively formed on the sheet substrate 9 in a repeating fashion.
  • detection marks 5 (5Y, 5M, 5C and 5B for each of the respective colorant layers) from which the position of each colorant layer is detected, are provided along one side edge of the substrate 9 as shown.
  • a block position-detecting mark 6 is provided along the other side edge of the substrate 9.
  • the sublimable yellow dye in the dye portion Y is thermally transferred to the printing paper according to the heating pattern.
  • a light source 7 for example an infrared light emission diode
  • a photo detector 8 constitute a detector means for detecting the detection marks 5 (5Y, 5M, 5C and 5B) and 6 in order that signals corresponding to the respective colour signals in the dye portions Y, M, C and B are supplied to the head elements 4a of the head 4.
  • Dye carrier ribbons for hard copy sublimation transfer have previously been made by dissolving or dispersing sublimable dyes and binder resins in solvents to obtain inks, and applying each of the inks on to a substrate of a uniform thin paper of a high density or a heat-resistant plastics film, such as a polyimide or polyester film.
  • Printing paper has been made by applying, on to a substrate, a resin having good dyeing properties for sublimable dyes, such as, for example, a polyester resin.
  • a thermal head is applied from the substrate side of the dye carrier ribbon, only the dye in the ribbon is sublimated and transferred to the printing paper to form an image of the desired colours, or a black and white image, on the printing paper.
  • a sublimable dye which has become unstable migrates on to the back surface of the substrate of the ribbon when the ribbon is wound in a roll, causing the thermal head to be contaminated and/or causing a lowering of the density or hue of the colour to be transferred.
  • a dye carrier ribbon for hard copy sublimation transfer comprising a substrate and an ink layer formed on a surface of said substrate, said ink layer mainly comprising a sublimation dye and a binder resin, said binder resin comprising a phenoxy or epoxy resin having bisphenol units therein, said phenoxy or epoxy resin having bisphenol units therein being present in a proportion which is at least 70 percent by weight of said binder resin, and said binder resin having a glass transition point not lower than 55 o C.
  • a preferred embodiment of the present invention provides a dye carrier ribbon with improved storage stability, and which is capable of forming a high quality print image.
  • FIG. 1 is a schematic illustration of a printer showing a printing mechanism for printing images on printing paper by thermal transfer of sublimation dyes.
  • Embodiments of the invention provide dye carrier ribbons for hard copy sublimation transfer in which an ink layer provided on a substrate mainly comprises a binder resin and a sublimable dye, and in which the binder resin is mainly composed of a phenoxy or epoxy resin having a glass transition point Tg not lower than 55 o C and bisphenol units therein.
  • bisphenol units is intended to mean those units having the following formulae:
  • resins having bisphenol units and their formulae are as follows: Bisphenol-type epoxy resins Phenoxy resins (high molecular weight product of bisphenol A-type epoxy compound)
  • the phenoxy or epoxy resin having bisphenol units is used in amounts not less than 70 wt% of the total amount of the binder resin.
  • the binder resin may further comprise, apart from the resin having bisphenol units, up to 30 wt% of other types of resin such as polyesters, other epoxy resins, nylon and cellulose acetate resins.
  • the binder resin should be arranged to have a glass transition point Tg not lower than 55 o C.
  • the sublimable dyes may be disperse dyes, oil-soluble dyes and the like, and are used in amounts of 10 to 200 parts, more preferably 30 to 120 parts, by weight per 100 parts by weight of the binder resin. Additives such as, for example, surface active agents, fillers, crosslinking agents and the like, may be added as required.
  • the substrate may be a thin paper having a high density and a smooth surface, for example condenser paper, or a heat-resistant film of a plastics resin such as a polyester, polyimide, polyamide or the like. The thickness is generally in the range of 3 - 25 ⁇ m, preferably 3 - 10 ⁇ m.
  • a phenoxy or epoxy resin having bisphenol units is chosen as a main component for the binder resin, which has a glass transition point Tg not lower than 55 o C.
  • An ink having the following formulation was prepared and was coated on one side of a condenser paper by the use of a gravure plate having a screen ruling of 185/inch (about 72.8/cm) and a depth of 40 ⁇ m, thereby forming a dye carrier ribbon.
  • An ink having the following formulation was prepared and applied onto a 10 ⁇ m thick condenser paper in a layer having a thickness of 1 ⁇ m, thereby forming a dye carrier ribbon.
  • Example 3 was repeated except that Epotot YD-017 (made by Toto Kasei Co., Ltd., bisphenol A-type epoxy resin, Tg 77 o C) was used instead of YD-012, thereby obtaining a dye carrier ribbon.
  • Epotot YD-017 made by Toto Kasei Co., Ltd., bisphenol A-type epoxy resin, Tg 77 o C
  • Example 3 was repeated except that there was used, instead of YD-012, a mixed resin (Tg 62 o C) of 9 parts by weight of Epotot YD-014 (made by Toto Kasei Co., Ltd., bisphenol A-type epoxy resin, Tg 65 o C) and 1 part by weight of TP-219 (made by Nippon Synthetic Chem. Ind. Co., Ltd., polyester resin, Tg 40 o C), thereby obtaining a dye carrier ribbon.
  • a mixed resin Tg 62 o C
  • Epotot YD-014 made by Toto Kasei Co., Ltd., bisphenol A-type epoxy resin, Tg 65 o C
  • TP-219 made by Nippon Synthetic Chem. Ind. Co., Ltd., polyester resin, Tg 40 o C
  • Example 3 was repeated except that there was used, instead of YD-012 only, a mixed resin (Tg 57 o C) of 7 parts by weight of YD-012 (Tg 60 o C) and 3 parts by weight of UE-3300 (made by Unitika Ltd., polyester resin, Tg 50 o C), thereby forming a dye carrier ribbon.
  • a mixed resin Tg 57 o C
  • UE-3300 made by Unitika Ltd., polyester resin, Tg 50 o C
  • Example 3 was repeated except that there was used, instead of YD-012, a mixed resin (Tg 83 o C) of 7 parts by weight of Phenototo YP-50 (made by Toto Kasei Co., Ltd., phenoxy resin, Tg 100 o C) and 3 parts by weight of UE-3300 (Tg 50 o C), thereby forming a dye carrier ribbon.
  • a mixed resin Tg 83 o C
  • Phenototo YP-50 made by Toto Kasei Co., Ltd., phenoxy resin, Tg 100 o C
  • UE-3300 Tg 50 o C
  • Example 3 was repeated except that there was used, instead of YD-012, a mixed resin (Tg 75 o C) of 7 parts by weight of Epotot YD-014 (Tg 65 o C) and 3 parts by weight of MH-101-2 (made by Fujikura Kasei Co. Ltd., Polymethyl methacrylate resin, Tg 105 o C), thereby forming a dye carrier ribbon.
  • a mixed resin Tg 75 o C
  • Epotot YD-014 Tg 65 o C
  • MH-101-2 made by Fujikura Kasei Co. Ltd., Polymethyl methacrylate resin, Tg 105 o C
  • An ink having the following formulation was prepared and printed on one side of a condenser paper by means of a gravure plate having a screen ruling of 183/inch (about 72.0/cm) and a depth of 40 ⁇ m, thereby forming a dye carrier ribbon.
  • the dye carrier ribbons of Examples 1 to 8 and Comparative Examples 1 to 3 were each applied with a 10% stearic acid solution in ethanol on the surface thereof in an amount of 0.1 g/m2 after drying, and were aged by allowing them to stand for 1 week under conditions of 40 o C and 90% R.H. (relative humidity).
  • the dye carrier ribbon aged by this process was used for printing on printing paper by the use of a thermal print head. As a result, it was found that no crystal growth of the dyes took place in the dye carrier ribbons of Examples 1 to 8 and accordingly the ribbons could yield good images similar to those obtained prior to ageing.
  • the binder resin in the dye carrier ribbon has a glass transition point Tg not lower than 55 o C and is mainly composed of a resin having bisphenol units, the storage stability of the dye carrier ribbon increases, and a prolonged life is obtained. The degree of freedom in selection of the sublimable dye to be mixed with the binder resin increases. When this type of dye carrier ribbon is used to transfer an image on to printing paper, a clear and very fine image is obtained.

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)

Claims (3)

  1. Un ruban encreur de colorants pour transfert par sublimation pour copie sur papier, le ruban encreur de colorants comprenant un support (9) et une couche d'encre (J, M, C ou N) formée sur une face dudit substrat (9), ladite couche d'encre (J, M, C ou N) comprenant principalement un colorant sublimable et un liant résineux, ledit liant résineux comprenant une résine phénoxy ou époxy ayant des motifs de bisphénol, ladite résine phénoxy ou époxy contenant les motifs de bisphénol dans une proportion qui est d'au moins 70 % en poids dudit liant résineux et ledit liant résineux ayant un point de transition vitreuse (Tg) de pas moins de 55oC.
  2. Un ruban encreur de colorants selon la revendication 1, dans lequel ledit colorant sublimable est présent dans ladite couche d'encre dans une porportion comprise entre 10 et 200 parties en poids pour 100 parties en poids dudit liant résineux.
  3. Un ruban encreur de colorants selon la revendication 2, dans lequel ledit colorant sublimable est présent dans ladite couche d'encre dans une proportion comprise entre 30 et 120 parties en poids pour 100 parties du poids dudit liant résineux.
EP19860310159 1985-12-26 1986-12-24 Rubans encreurs Expired EP0228294B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP295826/85 1985-12-26
JP60295826A JPS62152795A (ja) 1985-12-26 1985-12-26 昇華転写式ハ−ドコピ−用インクリボン

Publications (3)

Publication Number Publication Date
EP0228294A2 EP0228294A2 (fr) 1987-07-08
EP0228294A3 EP0228294A3 (en) 1988-08-31
EP0228294B1 true EP0228294B1 (fr) 1991-12-04

Family

ID=17825674

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860310159 Expired EP0228294B1 (fr) 1985-12-26 1986-12-24 Rubans encreurs

Country Status (3)

Country Link
EP (1) EP0228294B1 (fr)
JP (1) JPS62152795A (fr)
DE (1) DE3682756D1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0757554B2 (ja) * 1985-12-27 1995-06-21 ソニーケミカル 株式会社 昇華転写式ハードコピー用被転写体
JP2938578B2 (ja) * 1990-12-14 1999-08-23 フジコピアン株式会社 熱転写記録媒体
US5252425A (en) * 1991-08-19 1993-10-12 Eastman Kodak Company Hard copy imaging system
US5342728A (en) * 1992-08-18 1994-08-30 Eastman Kodak Company Stabilizers for dye-donor element used in thermal dye transfer
JP3597255B2 (ja) * 1995-07-03 2004-12-02 フジコピアン株式会社 熱転写記録材料
US5756418A (en) * 1996-11-27 1998-05-26 Eastman Kodak Company Binder for thermal transfer donor element
EP1974948A3 (fr) * 2007-03-29 2012-02-08 FUJIFILM Corporation Procédé de formation d'images utilisant un système de transfert thermosensible

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5937237B2 (ja) * 1980-12-22 1984-09-08 富士化学紙工業株式会社 熱転写記録媒体
JPS57140188A (en) * 1981-02-25 1982-08-30 Ricoh Co Ltd Ink sheet
JPS5914994A (ja) * 1982-07-16 1984-01-25 Matsushita Electric Ind Co Ltd 像転写体
JPS5945184A (ja) * 1982-09-09 1984-03-13 Sony Corp 熱昇華型感熱転写記録インクリボン
JPS5978897A (ja) * 1982-10-27 1984-05-07 Matsushita Electric Ind Co Ltd 染料転写体
JPS59199295A (ja) * 1983-04-28 1984-11-12 Sony Corp 昇華転写式コピ−用インキリボンのインキ組成物

Also Published As

Publication number Publication date
EP0228294A3 (en) 1988-08-31
JPH0533680B2 (fr) 1993-05-20
DE3682756D1 (de) 1992-01-16
EP0228294A2 (fr) 1987-07-08
JPS62152795A (ja) 1987-07-07

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