EP0749847B1 - Couche magnétique dans l'élément donnant le colorant pour le transfert thermique du colorant - Google Patents

Couche magnétique dans l'élément donnant le colorant pour le transfert thermique du colorant Download PDF

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Publication number
EP0749847B1
EP0749847B1 EP96201632A EP96201632A EP0749847B1 EP 0749847 B1 EP0749847 B1 EP 0749847B1 EP 96201632 A EP96201632 A EP 96201632A EP 96201632 A EP96201632 A EP 96201632A EP 0749847 B1 EP0749847 B1 EP 0749847B1
Authority
EP
European Patent Office
Prior art keywords
dye
layer
donor element
thermal
magnetic
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
EP96201632A
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German (de)
English (en)
Other versions
EP0749847A1 (fr
Inventor
Linda S. c/o Eastman Kodak Co. Flosenzier
Robert Owen C/O Eastman Kodak Co. James
Philip G. c/o Eastman Kodak Co. Walker
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Eastman Kodak Co
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Eastman Kodak Co
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Filing date
Publication date
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Publication of EP0749847A1 publication Critical patent/EP0749847A1/fr
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Publication of EP0749847B1 publication Critical patent/EP0749847B1/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
    • 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

Definitions

  • This invention relates to a dye-donor element used in thermal dye transfer, and more particularly to the use of a magnetic recording layer underneath a slipping layer on the back side thereof.
  • thermal transfer systems have been developed to obtain prints from pictures which have been generated electronically from a color video camera.
  • an electronic picture is first subjected to color separation by color filters.
  • the respective color-separated images are then converted into electrical signals.
  • These signals are then operated on to produce cyan, magenta and yellow electrical signals.
  • These signals are then transmitted to a thermal printer.
  • a cyan, magenta or yellow dye-donor element is placed face-to-face with a dye-receiving element.
  • the two are then inserted between a thermal printing head and a platen roller.
  • a line-type thermal printing head is used to apply heat from the back of the dye-donor sheet.
  • the thermal printing head has many heating elements and is heated up sequentially in response to the cyan, magenta and yellow signals. The process is then repeated for the other two colors. A color hard copy is thus obtained which corresponds to the original picture viewed on a screen. Further details of this process and an apparatus for carrying it out are contained in U.S. Patent No. 4,621,271 by Brownstein entitled “Apparatus and Method for Controlling A Thermal Printer Apparatus,” issued November 4, 1986.
  • a slipping layer is usually provided on the backside of the dye-donor element to prevent sticking to the thermal head during printing.
  • a subbing layer is also usually needed to promote adhesion between the support and the slipping layer.
  • thermal dye transfer printing it would be advantageous to have certain information recorded directly on the thermal dye-transfer element.
  • examples for potentially useful information would be specific product identification, sensitometric information, recording of the number of print areas remaining on the spool, dye patch position relative to the printer heat line, and so forth.
  • U.S. Patent 5,342,671 discloses the use of a transparent magnetic layer on a dye-receiver element. However, there is no disclosure in this patent of the use of magnetic layers in a dye-donor element.
  • JP-A-4/118289 describes an image and data recording sheet, which in fact comprises a dye-receiving element and not a dye-donor element.
  • JP-B-02/054798 a donor element is described for thermal wax transfer which has a magnetic ink layer or patch contiguous to a nonmagnetic thermal transfer layer or patch near the end position for the purpose of detecting the end position.
  • the magnetic ink layer is coated on the ink side of the donor element and has the same color as the nonmagnetic ink layer next to it. A portion of the magnetic ink may also transfer to the receiving element during the printing process.
  • the magnetic layer or patch is limited to being located adjacent to an ink layer or patch.
  • a dye-donor element for thermal dye transfer comprising a support having on one side thereof a dye layer and on the other side thereof in the direct opposite area to at least a portion of the dye layer, a magnetic recording layer and a slipping layer, in that order.
  • the magnetic recording layer used in this invention can comprise a ferromagnetic oxide such as gamma Fe 2 O 3 , gamma Fe 2 O 3 having a cobalt surface treatment, magnetite, magnetite having a cobalt surface treatment, barium ferrite, chromium dioxide, or a ferromagnetic metal particle such as metallic iron or metallic iron alloys with cobalt, nickel, chromium, etc. All of the above particles may also have a surface treatment with silica, alumina or an alumino-silicate to improve dispersability, corrosion and abrasion resistance. In a preferred embodiment of the invention, gamma Fe 2 O 3 having a cobalt surface treatment is used.
  • the above particles may have a coercivity of from about 23.88 kA/m (300 Oersted) to about 119.4 kA/m (1500 Oersted), preferably from about 47.76 kA/m (600 Oersted) to about 71.64 kA/m (900 Oersted).
  • the magnetic recording layer of the invention may be present in any concentration which is effective for the intended purpose. In general, good results have been attained using a laydown of from 0.01 g/m 2 to 4 g/m 2 , preferably 0.04 g/m 2 to 0.1 g/m 2 .
  • any dye can be used in the dye layer of the dye-donor element of the invention provided it is transferable to the dye-receiving layer by the action of heat.
  • sublimable dyes such as or any of the dyes disclosed in U.S. Patent 4,541,830.
  • the above dyes may be employed singly or in combination to obtain a monochrome.
  • the dyes may be used at a coverage of from about 0.05 to about 1 g/m 2 and are preferably hydrophobic.
  • a dye-barrier layer may be employed in the dye-donor elements of the invention to improve the density of the transferred dye.
  • Such dye-barrier layer materials include hydrophilic materials such as those described and claimed in U.S. Patent No. 4,716,144.
  • the dye layer of the dye-donor element may be coated on the support or printed thereon by a printing technique such as a gravure process.
  • Any slipping layer may be used in the dye-donor element of the invention to prevent the printing head from sticking to the dye-donor element.
  • a slipping layer would comprise either a solid or liquid lubricating material or mixtures thereof, with or without a polymeric binder or a surface-active agent.
  • Preferred lubricating materials include oils or semi-crystalline organic solids that melt below 100°C such as poly(vinyl stearate), beeswax, perfluorinated alkyl ester polyethers, poly(caprolactone), silicone oil, poly(tetrafluoroethylene), carbowax, poly(ethylene glycols), or any of those materials disclosed in U. S.
  • Suitable polymeric binders for the slipping layer include poly(vinyl alcohol-co-butyral), poly(vinyl alcohol-co-acetal), poly(styrene), poly(vinyl acetate), cellulose acetate butyrate, cellulose acetate propionate, cellulose acetate or ethyl cellulose.
  • the amount of the lubricating material to be used in the slipping layer depends largely on the type of lubricating material, but is generally in the range of about 0.001 to about 2 g/m 2 . If a polymeric binder is employed, the lubricating material is present in the range of 0.05 to 50 weight %, preferably 0.5 to 40 weight %, of the polymeric binder employed.
  • any material can be used as the support for the dye-donor element of the invention provided it is dimensionally stable and can withstand the heat of the thermal printing heads.
  • Such materials include polyesters such as poly(ethylene terephthalate); polyamides; polycarbonates; glassine paper; condenser paper; cellulose esters such as cellulose acetate; fluorine polymers such as polyvinylidene fluoride or poly(tetrafluoroethylene-co-hexafluoropropylene); polyethers such as polyoxymethylene; polyacetals; polyolefins such as polystyrene, polyethylene, polypropylene or methylpentene polymers; and polyimides such as polyimide amides and polyetherimides.
  • the support generally has a thickness of from about 2 to about 30 ⁇ m.
  • the dye-receiving element that is used with the dye-donor element of the invention usually comprises a support having thereon a dye image receiving layer.
  • the support may be a transparent film such as a poly(ether sulfone), a polyimide, a cellulose ester such as cellulose acetate, a poly(vinyl alcohol-co-acetal) or a poly(ethylene terephthalate).
  • the support for the dye-receiving element may also be reflective such as baryta-coated paper, polyethylene-coated paper, white polyester (polyester with white pigment incorporated therein), an ivory paper, a condenser paper or a synthetic paper such as DuPont Tyvek®.
  • the dye image-receiving layer may comprise, for example, a polycarbonate, a polyurethane, a polyester, poly(vinyl chloride), poly(styrene-co-acrylonitrile), polycaprolactone or mixtures thereof.
  • the dye image-receiving layer may be present in any amount which is effective for the intended purpose. In general, good results have been obtained at a concentration of from about 1 to about 5 g/m 2 .
  • the dye-donor elements of the invention are used to form a dye transfer image.
  • Such a process comprises imagewise heating a dye-donor element as described above and transferring a dye image to a dye receiving element to form the dye transfer image.
  • the dye-donor element of the invention may be used in sheet form or in a continuous roll or ribbon. If a continuous roll or ribbon is employed, it may have only one dye or may have alternating areas of other different dyes, such as sublimable cyan and/or magenta and/or yellow and/or black or other dyes. Such dyes are disclosed in U.S. Patent Nos. 4,541,830; 4,698,651; 4,695,287; 4,701,439; 4,757,046; 4,743,582; 4,769,360 and 4,753,922. Thus, one-, two-, three- or four-color elements (or higher numbers also) are included within the scope of the invention.
  • the dye-donor element comprises a poly(ethylene terephthalate) support coated with sequential repeating areas of yellow, cyan and magenta dye, and the above process steps are sequentially performed for each color to obtain a three-color dye transfer image.
  • a monochrome dye transfer image is obtained.
  • Thermal printing heads which can be used to transfer dye from the dye-donor elements of the invention are available commercially.
  • a thermal dye transfer assemblage of the invention comprises
  • the above assemblage comprising these two elements may be preassembled as an integral unit when a monochrome image is to be obtained. This may be done by temporarily adhering the two elements together at their margins. After transfer, the dye-receiving element is then peeled apart to reveal the dye transfer image.
  • the above assemblage is formed on three occasions during the time when heat is applied by the thermal printing head. After the first dye is transferred, the elements are peeled apart. A second dye-donor element (or another area of the donor element with a different dye area) is then brought in register with the dye-receiving element and the process is repeated. The third color is obtained in the same manner.
  • a dye-donor element was prepared by coating on each side of a 6 ⁇ m poly(ethylene terephthalate) support a subbing layer of titanium alkoxide (DuPont Tyzor TBT)® (0.13 g/m 2 ) from a n-propyl acetate and n-butyl alcohol solvent mixture.
  • DuPont Tyzor TBT titanium alkoxide
  • test samples E-1 and E-2 were prepared by coating a magnetic layer on the back side (opposite to the dye side) of the above donor support.
  • the magnetic coatings were prepared by blending a dispersion of magnetic particles and a dispersion of an abrasive or polishing powder. The procedures for making these dispersions are described below.
  • Coating formulations prepared with the above dispersions were as follows: E-1 MATERIAL % SOLIDS AIM COVERAGE (g/m 2 ) cellulose diacetate 2.90 0.94 magnetic dispersion 0.18 0.06 cellulose triacetate 0.18 0.06 FC-431 0.015 0.05 Solsperse® 24000 0.0234 0.08 E-2 MATERIAL % SOLIDS AIM COVERAGE (g/m 2 ) cellulose diacetate 2.90 0.94 magnetic dispersion 0.18 0.06 cellulose triacetate 0.18 0.06 dibutyl phthalate 0.349 0.12 GAFAC® PE-510 0.009 0.003 FC-431 0.015 0.05 Solsperse® 24000 0.0025 0.07 abrasive dispersion 0.050 0.02
  • Test sample E-1 was then provided with a slipping layer of the following composition (coated over the magnetic layer):
  • Test sample E-2 was not provided with a slipping layer.
  • a comparative control sample C-1 was prepared by coating the same support, dye and slipping layers of test sample E-1, but omitting the magnetic backcoat.
  • polycarbonate dye receivers were prepared using the following materials:
  • a receiver element was prepared by applying a subbing layer of 0.11 g/m 2 of Dow Z-6020 (a water-soluble aminoalkyl-alkoxysilane available from Dow Chemical Co.) in 3A alcohol to a support of a microvoided polypropylene layer laminated onto a white reflective support of titanium dioxide-pigmented polyethylene-overcoated paper stock.
  • a receiving layer of the following composition was coated onto the subbing layer:
  • the dye side of the dye-donor element strip approximately 10 cm x 13 cm in area was placed in contact with the dye image-receiving element of the same area.
  • the assemblage was clamped to a stepper-motor driven 60 mm diameter rubber roller, and a TDK Thermal Head (no. L-231) (thermostated at 26°C) was pressed with a force of 36 newtons against the dye-donor element side of the assemblage pushing it against the rubber roller.
  • the imaging electronics were activated causing the donor/receiver assemblage to be drawn between the printing head and roller at 6.9 mm/s.
  • the resistive elements in the thermal print head were pulsed for 29 ⁇ s/pulse at 128 ⁇ s intervals during the 33 msec/dot printing time.
  • An image was generated with regions of varying density by setting the number of pulses/dot for a particular density at a set value between 0 to 255.
  • the voltage supplied to the print head was approximately 23.5 volts, resulting in an instantaneous peak power of 1.3 watts/dot and a maximum total energy of 9.6 mjoules/dot.
  • the dye transfer element was separated from the receiving element immediately after passing the thermal head.
  • the receiver element was then backed up and the position reinitialized under the head and printed again with the next color. In this way a full color (YMC) image was obtained.
  • YMC full color
  • the Status A densities of the images were measured on an X-Rite densitometer (X-Rite Corp., Grandville, MI) and are as follows: Energy (mJ/dot) Yellow Magenta Cyan C-1 E-1 C-1 E-1 C-1 E-1 0 0.11 0.10 0.12 0.11 0.11 0.10 1.1 0.11 0.10 0.12 0.11 0.11 0.11 2.1 0.11 0.10 0.12 0.11 0.11 0.11 3 0.14 0.12 0.15 0.12 0.14 0.12 4 0.36 0.31 0.34 0.30 0.32 0.30 4.9 0.55 0.50 0.50 0.47 0.46 0.42 5.8 0.3 0.69 0.67 0.64 0.61 0.58 6.8 0.96 0.91 0.87 0.84 0.81 0.79 7.7 1.23 1.20 1.16 1.12 1.07 1.05 8.7 1.58 1.57 1.54 1.49 1.40 1.35 9.6 1.99 1.97 2.40 1.96 1.80 1.74

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

Claims (10)

  1. Elément donneur de colorant utilisé dans le transfert de colorant par la chaleur comprenant un support recouvert, sur une face, d'une couche de colorant et sur l'autre face dans la zone directement opposée à au moins une partie de ladite couche de colorant, d'une couche d'enregistrement magnétique et d'une couche favorisant le glissement, dans cet ordre.
  2. Elément selon la revendication 1, dans lequel ladite couche d'enregistrement magnétique est présente selon une concentration comprise entre 0,01 et 4 g/m2.
  3. Elément selon la revendication 1, dans lequel ladite substance magnétique est un oxyde ferromagnétique ou une particule métallique ferromagnétique.
  4. Elément selon la revendication 1, dans lequel ladite substance magnétique est du gamma Fe2O3 ayant reçu un traitement superficiel au cobalt.
  5. Procédé de formation d'une image par transfert de colorant comprenant les étapes suivantes :
    a) chauffer, en conformité avec l'image, un élément donneur de colorant comprenant un support recouvert, sur une face, d'une couche de colorant et sur l'autre face dans la zone directement opposée à au moins une partie de ladite couche de colorant, d'une couche d'enregistrement magnétique et d'une couche favorisant le glissement, dans cet ordre, et
    b) transférer l'image de colorant sur un élément récepteur de colorant pour former ladite image par transfert de colorant.
  6. Procédé selon la revendication 5, dans lequel ladite couche d'enregistrement magnétique est présente selon une concentration comprise entre 0,01 et 4 g/m2.
  7. Procédé selon la revendication 5, dans lequel ladite substance magnétique est un oxyde ferromagnétique ou une particule métallique ferromagnétique.
  8. Procédé selon la revendication 5, dans lequel ladite substance magnétique est du gamma Fe2O3 ayant reçu un traitement superficiel au cobalt.
  9. Assemblage pour le transfert de colorant par la chaleur comprenant
    (a) un élément donneur de colorant comprenant un support recouvert, sur une face, d'une couche de colorant et sur l'autre face dans la zone directement opposée à au moins une partie de ladite couche de colorant, d'une couche d'enregistrement magnétique et d'une couche favorisant le glissement, dans cet ordre, et
    (b) un élément récepteur de colorant comprenant un support recouvert d'une couche réceptrice d'image de colorant, ledit élément récepteur de colorant étant superposé audit élément donneur de colorant, de manière que ladite couche de colorant soit en contact avec ladite couche réceptrice d'image de colorant.
  10. Assemblage selon la revendication 9, dans lequel ladite couche d'enregistrement magnétique est présente selon une concentration comprise entre 0,01 et 4 g/m2.
EP96201632A 1995-06-23 1996-06-12 Couche magnétique dans l'élément donnant le colorant pour le transfert thermique du colorant Expired - Lifetime EP0749847B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US46295P 1995-06-23 1995-06-23
US462 1995-06-23
US55969296A 1996-02-12 1996-02-12
US559692 1996-02-12

Publications (2)

Publication Number Publication Date
EP0749847A1 EP0749847A1 (fr) 1996-12-27
EP0749847B1 true EP0749847B1 (fr) 1999-04-14

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EP96201632A Expired - Lifetime EP0749847B1 (fr) 1995-06-23 1996-06-12 Couche magnétique dans l'élément donnant le colorant pour le transfert thermique du colorant

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8268657B2 (en) 2005-08-30 2012-09-18 Samsung Mobile Display Co., Ltd. Laser induced thermal imaging apparatus

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007062354A (ja) * 2005-08-30 2007-03-15 Samsung Sdi Co Ltd レーザ熱転写ドナーフィルム、レーザ熱転写装置、レーザ熱転写法及び有機発光素子の製造方法
US7817175B2 (en) 2005-08-30 2010-10-19 Samsung Mobile Display Co., Ltd. Laser induced thermal imaging apparatus and fabricating method of organic light emitting diode using the same
JP2007128845A (ja) 2005-11-04 2007-05-24 Samsung Sdi Co Ltd レーザ熱転写装置及びレーザ熱転写方法
JP2007128844A (ja) 2005-11-04 2007-05-24 Samsung Sdi Co Ltd レーザ熱転写装置及びレーザ熱転写方法そしてこれを利用した有機発光表示素子
KR100700831B1 (ko) * 2005-11-16 2007-03-28 삼성에스디아이 주식회사 레이저 열 전사법 및 이를 이용한 유기 발광소자의제조방법

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4717711A (en) * 1985-12-24 1988-01-05 Eastman Kodak Company Slipping layer for dye-donor element used in thermal dye transfer
US5342671A (en) * 1992-06-05 1994-08-30 Eastman Kodak Company Encoded dye receiver

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8268657B2 (en) 2005-08-30 2012-09-18 Samsung Mobile Display Co., Ltd. Laser induced thermal imaging apparatus
US8613989B2 (en) 2005-08-30 2013-12-24 Samsung Display Co., Ltd. Film donor device for laser induced thermal imaging

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