EP0810924B1 - Ruban pour transfert thermique - Google Patents

Ruban pour transfert thermique Download PDF

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Publication number
EP0810924B1
EP0810924B1 EP96943998A EP96943998A EP0810924B1 EP 0810924 B1 EP0810924 B1 EP 0810924B1 EP 96943998 A EP96943998 A EP 96943998A EP 96943998 A EP96943998 A EP 96943998A EP 0810924 B1 EP0810924 B1 EP 0810924B1
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EP
European Patent Office
Prior art keywords
layer
thermal transfer
wax
transfer ribbon
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
EP96943998A
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German (de)
English (en)
Other versions
EP0810924A1 (fr
Inventor
Heinrich Krauter
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.)
Pelikan Produktions AG
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Pelikan Produktions AG
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Filing date
Publication date
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Publication of EP0810924A1 publication Critical patent/EP0810924A1/fr
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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
    • B41M5/382—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
    • 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
    • B41M5/44—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.]
    • Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
    • Y10T428/2495—Thickness [relative or absolute]
    • 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.]
    • Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
    • Y10T428/2495—Thickness [relative or absolute]
    • Y10T428/24967—Absolute thicknesses specified
    • Y10T428/24975—No layer or component greater than 5 mils thick

Definitions

  • the invention relates to a thermal transfer ribbon with a conventional carrier and thereon arranged thermal transferable layers.
  • Thermal transfer ribbons have been known for a long time. They point to a foil-like Carrier, for example made of paper, a plastic or the like, a Thermal transfer ink, especially in the form of a plastic and / or wax-bound colorant or soot layer.
  • the thermal transfer color is used for the Thermal printing technology by means of a thermal print head softens and on Transfer recording paper or printing paper.
  • Thermal printers or Thermal printheads that can be used for this process are known for example from DE-AS 24 06 613 and DE-OS 32 24 445. in the Individuals can e.g. proceed as follows: On the thermal print head of the The printer becomes a heated dot and is placed on a sheet of paper letter to be printed.
  • the thermal print head prints that Thermal transfer ribbon on a paper to be written on.
  • the heated letter of the Thermal print head with a temperature of about 400 ° C causes the Thermal transfer ink softens at the heated point and in contact with it standing paper sheet is transferred.
  • the used part of the thermal transfer ribbon is then fed to a coil.
  • the thermal transfer ribbon can have different thermal transfer colors side by side exhibit. With the combination of the basic colors blue, yellow and red, produce colored print images. Compared to the usual color photography is not necessary adverse development and fixation. Thermal printers can be used with large Operate writing speed and without annoying background noises. So you can for example, print on an A4 sheet in about 10 seconds.
  • serial printers So-called serial printers or line printers can be used for printing.
  • the serial printers work with a relatively small, movable printhead up to approx. 1 cm 2 .
  • There are 1 or 2 dot rows perpendicular to the writing direction (dot controllable heating point).
  • the dot diameter is between about 0.05 to 0.25 mm.
  • the number of dots per row of dots is between 6 and 64, which corresponds to a resolution of 2 to 16 dots / mm. Higher resolutions, eg 24 to 32 dots / mm, are expected in the near future.
  • It is characteristic of the serial thermal head that it is moved horizontally to the transport direction of the paper during the printing process.
  • a line print head is a stationary head or a bar.
  • Print bars are available in lengths of up to 297 mm.
  • the resolution and dot size correspond to those of serial heads.
  • the serial printers are used in typewriters, video printouts, in the PC area as well as in word processors, while the line printers are used in particular in the case of barcode graphic printers, in a computer output unit when there is a large amount of data, in the facsimile, ticket printer, address printer, color copier and CAD / CAM system.
  • thermal transfer ribbons In addition to the thermal transfer ribbons described above, there are also those in which the Thermal symbol not through the action of a thermal print head, but through Resistance heating is impressed on a specially designed film-like carrier. The resistance heating takes place in that the thermal transfer color and / or their Carriers contain electrically conductive materials.
  • the thermal transfer ink that the The actual "functional layer" during the printing process also contains the one already above described materials. This is also referred to as an ETR material ("Electro Thermal Ribbon ").
  • ETR material Electro Thermal Ribbon
  • a corresponding thermal transfer printing system for example in U.S. Patent 4,309,117.
  • the typeface is sharp and the optical density of the font created, among other things. from the liability of Thermal transfer color depending on the paper. This is proportional to the adhesive area and the adhesive force.
  • Rough paper has a small adhesive area, since only the raised parts of the The surface of the paper is wetted by the melted thermal transfer ink.
  • "Filling layer” formed from a low-viscosity in the melted state There is material that flows into the valleys of the rough paper surface during the printing process and so increases the adhesive area.
  • EP-B-0 348 661 proposes that the hold-off layer or adhesive layer, also known as a top coat, a finely divided form embedded in a paraffin to incorporate tackifying hydrocarbon resin, the paraffin having a Has a melting point of 60 to 95 ° C.
  • the teaching according to EP 0 206 036 tries the Avoid the need for such an adhesive layer or a top coat by a layer of wax on the layer of a plastic-bonded thermal transfer ink trained and the plastic-bound thermal transfer ink a thermoplastic Contains plastic with a softening point of 60 to 140 ° C.
  • the thermal ribbons described above are finding their way into high-speed printers, especially in the industrial sector, with a printhead from Type of the so-called "real edge” or “corner type” are used.
  • These Printheads is the row of dots near the edge or directly on the edge of one Ceramic substrate arranged.
  • the edge-type heads have the advantage of being shorter Cooling down times and accordingly a higher write frequency. It can be used Achieve print speeds of 3 to 12 "per second High speed printing, especially high speed color printing,
  • the prints achieved have special requirements in terms of print quality, i.e. good edge sharpness, resolution and optical density.
  • a special The area of application is the printing of paper and plastic labels. On the latter high scratch resistance of the prints is desirable.
  • the object of the invention was therefore to provide a thermal transfer ribbon, with which high printing speeds are achieved with satisfactory print quality can be.
  • the thermal transfer ink transferred during printing is intended in particular to Paper and plastic labels show good adhesion and good scratch resistance.
  • layer (ii) also contains about 5 to 40, in particular about 10 to 20% by weight of fillers.
  • thermo-transferable layer can be used with a low enthalpy of fusion.
  • layer compositions with low enthalpy of fusion in molten state have a high adhesion to carrier materials, so that inadequate transfer to the receiving substrate during the printing process would.
  • the invention solves this problem by means of a specially designed layer (i) between the support and the layer (ii) with low enthalpy of fusion.
  • the waxes used in layer (i) follow the usual wax definition with the usual wax definition with the The above limitation of the melting point to about 70 to 110 ° C. It is in broadest sense about a material that is firm to brittle hard, coarse to fine crystalline, translucent to opaque, but not glassy, melts above about 70 ° C, however, a little above the melting point, relatively low viscosity and is not stringy. Waxes of this type can be found in hydrocarbon waxes (Alkanes without functional groups) and in waxes from long-chain organic Classify compounds with functional groups (especially ester and acid waxes). In addition to petroleum wax, hydrocarbon waxes include petroleum and Tar extracted solid hydrocarbons as well as synthetic paraffins.
  • Waxes with functional groups include all vegetable waxes as well as chemical ones changed waxes.
  • Ester waxes consist essentially of esters, the linear ones Carboxylic acids with about 18 to 34 carbon atoms and linear alcohols of about the same length are formed. Acid waxes contain large amounts of free carboxylic acids.
  • Waxes with functional groups are preferred.
  • ester waxes e.g. based on montan wax, partially saponified ester waxes, acid waxes and oxidized and to name esterified synthetic waxes.
  • the particularly preferred ester waxes include vegetable waxes such as carnauba wax and candelilla wax as well high melting paraffins.
  • the invention waxes a melting point of 70 to 105 ° C. The details are here to be stated as particularly preferred: carnauba wax, LG wax BASF and Hoechst wax E.
  • Layer (i) also contains about 1 to 22% by weight, preferably about 2 to 20% by weight and especially about 4 to 10% by weight polymeric wax plasticizer.
  • Hard waxes especially in the form of ester waxes and high-melting ones narrow paraffins, are plasticized and thus their brittleness and Lose "splinter". They ensure good anchoring or adhesion of the Separating layer on the carrier material.
  • Ester waxes are very hard or brittle waxes, i.e. they can be pulverized when cold. Are these marked with polymeric wax plasticizers, then elastic products are created that hardly still to be pulverized. The stated amount of polymeric wax plasticizer is critical.
  • Too little amount of polymer Wax plasticizer may have as a result that the brittle wax plasticizes insufficiently and the layer (i) shows no closed peeling behavior or at all leads to an inhomogeneous image, especially in coherent colored areas.
  • the polymeric wax plasticizers used are polyester, copolyester, polyvinyl acetate, Polystyrenes with a glass transition temperature Tg of -30 to + 70 ° C are considered. Of which are Polyester and copolyester preferred. These are preferably linear saturated polyester or copolyester with an average molecular weight of 1500 to 18000. Layer (i) usually has a melting enthalpy ⁇ H of about 150 up to 210 J / g.
  • Layer (ii) has an enthalpy of fusion ⁇ H of approximately 10 to 80, in particular approximately 15 to 50 J / g.
  • Show thermal transfer color layers according to the prior art usually has a melting enthalpy ⁇ H of over 130 to 220 J / g.
  • Melting enthalpy ⁇ H is understood to mean the amount of endothermic energy that is generated by the Peak area is embodied in the DSC measurement in the temperature interval 25 to 120 ° C is enclosed by the heat flow temperature curve and the baseline.
  • the layer composition (ii) does not have to be in the specified temperature interval necessarily melt completely, which is regularly the case when the layer contains dispersed insoluble components such as fillers.
  • the Layer (ii) shows at least one phase transition in the specified temperature interval, in which it changes from the solid state to a relatively low-viscosity state, and this phase transition in the DSC calorigram causes a peak that corresponds to the specified amount of energy corresponds. If several peaks occur, the The sum of the peak areas. To achieve the sufficiently low The enthalpy of fusion must be given special attention to the choice of binder.
  • the binder of layer (ii) must also be compatible with wax so that the layer (ii) has sufficient adhesion to layer (i). Under "wax compatible” is understood here that this polymer is compatible with a liquid wax and when cooling a solution or a dispersion of the polymer in wax none Phase separation occurs.
  • Draw wax-compatible polymers in the sense of the invention are characterized in that they are meltable below about 100 ° C. You show in melted state stickiness.
  • Suitable polymers are e.g. Ethylene vinyl acetate copolymers (EVA), ethylene-acrylic acid copolymers, polyamides and ionomer resins. Of these, ethylene-acrylic acid copolymers and EVA are preferred, especially one with a vinyl acetate content ⁇ about 25% by weight; Types with at least about 33 or 40 % By weight vinyl acetate is particularly suitable.
  • Layer (ii) also contains about 5 to 30% by weight, in particular about 15 to 25% by weight % By weight, waxes and / or wax-like substances.
  • the addition of waxes and / or wax-like substances prevent the tape from sticking when rolled up or sticking of the tape to the receiving substrate at locations where there is no Symbol should be transferred.
  • a higher addition of wax than indicated is too avoid, because the high enthalpy of fusion of the wax entire formulation of layer (ii) would become too high.
  • a low wax additive leads to a low enthalpy of fusion, but does not prevent sticking desired scope.
  • Suitable waxes for layer (ii) are: narrow-cut Paraffin waxes, ester waxes, acid waxes, micro waxes and modified Micro waxes.
  • Natural waxes are not preferred. Narrow paraffin waxes are particularly preferred. The waxes listed are characterized in that Softening and melting point are close together. When heating up should at least 80% of the material within a temperature interval of 10 ° C become molten. The melting point of the waxes in layer (ii) is preferably at about 70 to 105C.
  • Layer (ii) is preferably also filled with extenders, such as e.g. Aluminum silicate, aluminum oxide, silica, talc, calcium carbonate, aluminum hydroxide, Zinc oxide, silica, china clay, titanium dioxide etc. are added.
  • extenders such as e.g. Aluminum silicate, aluminum oxide, silica, talc, calcium carbonate, aluminum hydroxide, Zinc oxide, silica, china clay, titanium dioxide etc. are added.
  • the Fillers lighten the color (transparent layers) and at the same time affects the "adhesive behavior" of the tape favorably.
  • the layer of thermal transfer ink preferably contains one or more resins with a melting point of 80 to 150 ° C.
  • Suitable resins are, for example, KW resins, terpene phenol resins, modified rosins, coumarone indene resins, maleate resins, alkyd resins, phenolic resins, polyester resins, polyamide resins and / or phthalate resins.
  • KW resins and polyterpene resins are particularly preferred.
  • the ratio of wax-compatible polymer to resin in the thermal transfer ink is preferably 70:30 to 90:10 (w / w).
  • Layer (ii) can be colored by any colorant. It can pigments, in particular carbon black, but also solvents and / or binder-soluble colorants, such as the commercial product Basoprint, organic Trade color pigments and various azo dyes (Cerces and Sudan dyes). Carbon black is particularly suitable in the context of the present invention.
  • layer (ii) contains the colorant, in particular color pigment, in an amount of about 10 to 20% by weight.
  • the viscosity of the layer (ii) must be sufficiently low so that the color quickly and can be delivered precisely.
  • the thermal transfer color of the invention Thermal transfer ribbon preferably has a viscosity of about 500 to 3000 mPa.s, measured with a Brookfield rotational viscometer at 140 ° C. Especially will the range from 600 to 1500 mPa.s is aimed for.
  • the polymeric binder used in layer (ii) is amorphous or at most semi-crystalline and requires little energy for the melting process. After this Printing process, the thermal transfer ribbon is separated from the acceptor as long as layer (ii) is still "liquid", i.e. in the melted or softened state is present. This fact enables the use of polymer resin-bound inks, which in turn ensure high edge sharpness, good resolution and optical density. This is particularly important for real-edge type print heads.
  • the plastic-bound color layer guarantees good scratch resistance of the transferred Print symbols on both paper and plastic labels.
  • the strengths of layers (ii) and (i) are not critical.
  • the layer preferably has (i) a thickness of about 0.5 to 4 ⁇ m, especially about 1 to 2 ⁇ m.
  • the layer (ii) is preferably about 1 to 5 ⁇ m, especially about 1 to 3 ⁇ m, thick.
  • the type of carrier of the thermal transfer ribbon according to the invention is also not critical. It is preferably polyethylene terephthalate film (PETP) or capacitor papers.
  • PETP polyethylene terephthalate film
  • the selection parameters are the highest possible tensile elongation values and thermal stability with low film thicknesses.
  • the PETP films are up to about 2.5 ⁇ m, capacitor paper down to about 6 ⁇ m available.
  • a layer of a Wax or wax-like material is formed, especially in a thickness of no more as 1 ⁇ m and very particularly preferably in the form of a molecularly formed, up to 0.01 ⁇ m
  • the coating material in this case preferably consists of paraffin, Silicone, natural waxes, especially carnauba wax, beeswax, ozokerite and Paraffin wax or synthetic waxes, especially acid waxes, ester waxes, partially saponified ester waxes and polyethylene waxes, glycols or polyglycols and / or surfactants.
  • the teaching according to the invention can be used with particular advantage in color printing use.
  • the creation of color prints by color mixing using the Thermal transfer printing is usually done on the principle of subtractive Color mixing.
  • the subtractive color mixture is created by superimposing Colorants on a white substrate caused by the secondary colors yellow, Magenta and cyan.
  • For thermal transfer printing this means that at least this three colors on one or more ribbons in transferable form, i.e. in a Thermal transfer ink embedded, must be available.
  • a fourth "color" namely black, for example on a soot basis, can be provided, since often a mixed one Black does not meet the requirements.
  • These three or four transferable colors can be added to the printer in various ways.
  • the present invention can be can of course also be used with good success for monochrome color prints.
  • the thermal transfer ribbon according to the invention can be used in a variety of ways Establish the application of customary application methods. This can be done, for example Spraying or printing a solution with dispersion, be it with water or an organic solvent as a dispersion or solvent, by application from the melt, which applies in particular to the wax-bound layer (i), or also by application by means of a doctor blade in the form of an aqueous suspension finely divided material to be applied.
  • a solution with dispersion be it with water or an organic solvent as a dispersion or solvent
  • the color layer also has coating processes such as reverse roll and / or Gravure coating, proven to be particularly advantageous.
  • the following general conditions can be specified with regard to the application quantities of the individual layers: on a carrier film, in particular polyester film with a thickness of approximately 2 to 8 ⁇ m, in particular with a thickness of approximately 4 to 5 ⁇ m, are applied in succession: coating composition to form layer (i) 0.5 to 4 g / m 2 , preferably approximately 0.5 to 2 g / m 2 , and coating composition to form layer (ii) 1 to 5 g / m 2 , preferably approximately 1 to 2 g / m 2 .
  • an above-mentioned backside coating of a thickness of about 0.01 to 0.2 g / m 2 , in particular of about 0.05 to 0.1 g / m 2 is formed on the back of the carrier.
  • layer (i) a material of the following recipe is applied to a conventional carrier made of a polyester with a layer thickness of approximately 6 ⁇ m:
  • Example 1 was repeated with the modification that the following recipes were used for layers (i) and (ii):

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

Claims (17)

  1. Ruban de transfert thermique comportant un support habituel et, disposées sur celui-ci dans l'ordre indiqué
    (i) une première couche thermiquement transférable contenant des cires d'un point de fusion de l'ordre de 70 à 110 °C, et environ 1 à 22 % en poids d'un plastifiant polymère de cire d'une température de transformation vitreuse Tg de - 30 à + 70 °C, et
    (ii) une deuxième couche thermiquement transférable contenant des colorants, un liant polymère compatible avec la cire, et environ 5 à 30 % en poids de cire et/ou de substance analogue à la cire, la couche thermiquement transférable (ii) ayant une enthalpie de fusion ΔH de l'ordre de 10 à 80 J/g.
  2. Ruban de transfert thermique selon la revendication 1, caractérisé en ce que la couche (ii) a une enthalpie de fusion ΔH de l'ordre de 15 à 50 J/g.
  3. Ruban de transfert thermique selon la revendication 1 ou 2, caractérisé en ce que la couche (ii) contient en outre environ 5 à 40 % en poids de matières de charge.
  4. Ruban de transfert thermique selon l'une des revendications 1 à 3, caractérisé en ce que le plastifiant polymère de cire de la couche (i) a une température de transformation vitreuse Tg de l'ordre de - 20 à + 10 °C.
  5. Ruban de transfert thermique selon l'une quelconque des revendications précédentes, caractérisé en ce que la cire de la couche (i) est une cire d'ester.
  6. Ruban de transfert thermique selon l'une quelconque des revendications précédentes, caractérisé en ce que la couche (i) contient 4 à 10 % en poids de plastifiants polymères de cire.
  7. Ruban de transfert thermique selon l'une quelconque des revendications précédentes, caractérisé en ce que le plastifiant polymère de cire de la couche (i) est un polyester et/ou une résine de copolyester.
  8. Ruban de transfert thermique selon l'une quelconque des revendications précédentes, caractérisé en ce que le liant polymère compatible avec la cire de la couche (ii) est un copolymère d'acétate de vinyle et d'éthylène, un copolymère éthylène-acide acrylique, un polyamide et/ou une résine ionomère.
  9. Ruban de transfert thermique selon l'une quelconque des revendications précédentes, caractérisé en ce que le liant polymère compatible avec la cire de la couche (ii) est amorphe ou tout au plus semi-cristallin.
  10. Ruban de transfert thermique selon l'une quelconque des revendications précédentes, caractérisé en ce que la couche (ii) contient en outre des résines sous forme de résines d'hydrocarbures ou de résines de polyterpène.
  11. Ruban de transfert thermique selon l'une quelconque des revendications précédentes, caractérisé en ce que la couche (ii) a une viscosité de l'ordre de 500 à 3 000 mPa.s, notamment de l'ordre de 600 à 1 500 mPa.s, mesurée à 140 °c avec un viscosimètre rotatif de Brookfield.
  12. Ruban de transfert thermique selon l'une quelconque des revendications précédentes, caractérisé en ce que l'épaisseur de la couche (i) est de 0,5 à 4 µm, notamment de l'ordre de 1 à 2 µm.
  13. Ruban de transfert thermique selon l'une quelconque des revendications précédentes, caractérisé en ce que l'épaisseur de la couche (ii) est de l'ordre de 1 à 5 µm, notamment de l'ordre de 1 à 3 µm.
  14. Ruban de transfert thermique selon l'une quelconque des revendications précédentes, caractérisé en ce que le support est une feuille de polyéthylène-téréphtalate.
  15. Ruban de transfert thermique selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il est appliqué sur la face arrière du support une couche constituée d'une cire ou d'une substance cireuse d'une épaisseur qui n'est pas supérieure à environ 1 µm.
  16. Utilisation du ruban de transfert thermique selon l'une au moins des revendications précédentes dans des imprimantes à grande vitesse, comportant notamment une tête d'impression de type "real-edge" ou "corner".
  17. Utilisation du ruban de transfert thermique selon l'une au moins des revendications 1 à 15, caractérisée en ce qu'il est utilisé pour l'impression couleur soustractive, les trois couleurs secondaires jaune, magenta et cyan se trouvant successivement sur un ruban encreur, ou les unes à côté des autres sur un ruban encreur, ou sur trois différents rubans encreurs qui se déroulent parallèlement lors de l'impression.
EP96943998A 1995-12-22 1996-12-18 Ruban pour transfert thermique Expired - Lifetime EP0810924B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19548401 1995-12-22
DE19548401A DE19548401A1 (de) 1995-12-22 1995-12-22 Thermotransferband
PCT/EP1996/005688 WO1997023355A1 (fr) 1995-12-22 1996-12-18 Bande de transfert thermique

Publications (2)

Publication Number Publication Date
EP0810924A1 EP0810924A1 (fr) 1997-12-10
EP0810924B1 true EP0810924B1 (fr) 1999-06-16

Family

ID=7781188

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96943998A Expired - Lifetime EP0810924B1 (fr) 1995-12-22 1996-12-18 Ruban pour transfert thermique

Country Status (5)

Country Link
US (1) US6033767A (fr)
EP (1) EP0810924B1 (fr)
CA (1) CA2228275A1 (fr)
DE (2) DE19548401A1 (fr)
WO (1) WO1997023355A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19744956C2 (de) * 1997-10-10 2002-10-31 Pelikan Produktions Ag Egg Thermotransferband für lumineszierende Schriftzeichen
US6376056B1 (en) 1996-08-08 2002-04-23 Pelikan Produktions Ag Thermo-transfer ribbon for luminescent letters
DE19820779A1 (de) * 1998-05-08 1999-11-11 Pelikan Produktions Ag Egg Thermotransferband
DE10033507A1 (de) * 2000-07-11 2002-01-31 Pasquini Und Kromer Gmbh Verfahren und Vorrichtung zur Herstellung von elektrisch leitfähigen Mustern auf Trägern, sowie Folie dazu
EP1318706A1 (fr) * 2001-12-07 2003-06-11 Horst J. Lindemann GmbH Procédé et dispositif pour la fabrication de motifs électroconducteurs sur des supports, et des feuilles pour ce procédé
JP2005014562A (ja) * 2003-06-30 2005-01-20 Fujicopian Co Ltd 熱転写記録媒体
US20050281974A1 (en) * 2004-06-18 2005-12-22 Wen-Chang Lu Thermo bonding film structure

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Publication number Priority date Publication date Assignee Title
US4511602A (en) * 1980-10-06 1985-04-16 Dennison Mfg. Company Thermal imprinting of substrates
DE3507097A1 (de) * 1984-03-02 1985-09-05 Canon K.K., Tokio/Tokyo Waermeempfindliches uebertragungsmaterial
US4732815A (en) * 1984-08-20 1988-03-22 Dai Nippon Insatsu Kabushiki Kaisha Heat transfer sheet
JPS6178692A (ja) * 1984-09-26 1986-04-22 Mitsubishi Paper Mills Ltd 熱転写材
DE3685351D1 (de) * 1985-03-12 1992-06-25 Gen Co Ltd Waermeempfindliches uebertragungsaufzeichnungsmaterial.
US4687360A (en) * 1986-01-15 1987-08-18 Pitney Bowes Inc. Thermal imaging ribbon including a partially crystalline polymer
GB2201253B (en) * 1987-01-23 1990-09-19 Fuji Photo Film Co Ltd Heat-sensitive recording materials
JPH0767833B2 (ja) * 1987-02-03 1995-07-26 コニカ株式会社 感熱転写記録媒体
JPS6438271A (en) * 1987-08-04 1989-02-08 Union Kemikaa Kk Thermal transfer ribbon
GB2222693B (en) * 1988-09-02 1992-09-30 Canon Kk Thermal transfer material and thermal transfer recording method
US5264279A (en) * 1989-09-19 1993-11-23 Dai Nippon Insatsu Kabushiki Kaisha Composite thermal transfer sheet
JP3020218B2 (ja) * 1989-11-21 2000-03-15 株式会社リコー 熱転写記録媒体
JP3188034B2 (ja) * 1993-04-27 2001-07-16 三洋電機株式会社 増幅回路
JPH0781256A (ja) * 1993-09-17 1995-03-28 Fujicopian Co Ltd 熱転写印字媒体

Also Published As

Publication number Publication date
WO1997023355A1 (fr) 1997-07-03
DE19548401A1 (de) 1997-07-03
DE59602240D1 (de) 1999-07-22
CA2228275A1 (fr) 1997-07-03
EP0810924A1 (fr) 1997-12-10
US6033767A (en) 2000-03-07

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