EP0785086B1 - Ruban pour le transfert thermique - Google Patents

Ruban pour le transfert thermique Download PDF

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Publication number
EP0785086B1
EP0785086B1 EP96116958A EP96116958A EP0785086B1 EP 0785086 B1 EP0785086 B1 EP 0785086B1 EP 96116958 A EP96116958 A EP 96116958A EP 96116958 A EP96116958 A EP 96116958A EP 0785086 B1 EP0785086 B1 EP 0785086B1
Authority
EP
European Patent Office
Prior art keywords
thermal transfer
layer
wax
waxes
transfer 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
EP96116958A
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German (de)
English (en)
Other versions
EP0785086A1 (fr
Inventor
Heinrich Krauter
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Pelikan Produktions AG
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Pelikan Produktions AG
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Filing date
Publication date
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Publication of EP0785086A1 publication Critical patent/EP0785086A1/fr
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Anticipated expiration legal-status Critical
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
    • B41M5/42—Intermediate, backcoat, or covering layers
    • B41M5/44—Intermediate, backcoat, or covering layers characterised by the macromolecular compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J31/00—Ink ribbons; Renovating or testing ink ribbons
    • B41J31/05—Ink ribbons having coatings other than impression-material coatings
    • B41J31/06—Ink ribbons having coatings other than impression-material coatings the coatings being directly on the base material, i.e. below impression transfer material; Ink ribbons having base material impregnated with material other than impression material
    • 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
    • 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
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31511—Of epoxy ether
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31551—Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31786—Of polyester [e.g., alkyd, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31855—Of addition polymer from unsaturated monomers
    • Y10T428/31935—Ester, halide or nitrile of addition polymer

Definitions

  • the invention relates to a thermal transfer ribbon with a conventional carrier, one on one side of the carrier formed wax-bound layer of a thermal transfer ink and one between the carrier and the wax-bound layer another layer.
  • 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 for example from DE-ASen 20 62 494 and 24 06 613 and DE-OS 32 24 445 known. In particular, e.g. proceed as follows: On the The printer's thermal printhead is made up of heated dots and on a letter to be printed on a paper sheet.
  • the thermal print head presses the thermal transfer ribbon on a paper to be written on.
  • the heated letter of the thermal print head with a temperature of up to about 400 ° C leads to the fact that the thermal transfer ink softens at the heated point and in contact with it standing paper sheet is transferred.
  • the part of the thermal transfer ribbon used 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 particular in typewriters, video printouts, in the PC area, as well as in word processors and line printers, in particular in the case of barcode graphic printers, in the case of a computer output unit in the event of high data loads, in the facsimile, ticket printer, address printer, color copier and CAD areas / CAM systems used.
  • 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 imprinted on a specially designed foil-like carrier becomes. The resistance heating takes place in that the thermal transfer color and / or their carriers contain electrically conductive materials.
  • the Thermal transfer ink which is the actual "functional layer" during the printing process, also contains the materials already described above.
  • ETR material Electro Thermal Ribbon
  • the Font sharpness 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 ones Parts of the paper surface are wetted by the melted thermal transfer ink become.
  • DE-A-35 07 097 is therefore based on the layer of thermal transfer ink a so-called "Filling-Läyer” is formed, which consists of a melted state low-viscous material exists, which in the printing process in the valleys of the rough Paper surface flows, increasing the adhesive area.
  • EP-B-0 348 661 proposes that the hold-off layer or Adhesive layer, also known as a top coat, in a paraffin in a finely divided form to incorporate embedded tackifying hydrocarbon resin, which Paraffin has a melting point of 60 to 95 ° C.
  • the teaching according to EP 0 206 036 tries to necessitate such an adhesive layer or a top coat avoid by putting on the layer a plastic bonded thermal transfer ink a wax layer is formed and the plastic-bonded thermal transfer ink unites contains thermoplastic plastic with a softening point of 60 to 140 ° C.
  • JP-1-38271 A discloses a thermal transfer ribbon in which a heat-resistant one Carrier in succession with a first color layer and a second color layer is coated.
  • the first color layer contains a color material and a wax compatible thermoplastic resin.
  • the second color layer consists of one continuous phase of wax incompatible thermoplastic resin in which one Phase of wax and a wax-compatible thermoplastic resin is dispersed. A color material is finely dispersed in both phases. When printing transfer both layers of paint.
  • JP-1-196380 A describes a thermal transfer ribbon with a support, one Intermediate layer and a layer of color.
  • the intermediate layer consists of Polyester resin, polyamide resin and carbon black.
  • the color layer consists of a powder of Soot particles encased in a water-soluble resin, and one Matrix component, the matrix component consisting of a colorant and wax consists.
  • the water-soluble resin as an enveloping component for the in the Soot particles contained in the color layer can be seen due to its hydrophilic nature not soluble in wax.
  • the invention was therefore based on the object, the above Continuing to develop thermal transfer ribbon so that the need for training Topcoat or a two-layer thermal transfer ink is not necessary and satisfactory matte prints can be obtained in the thermal printing process.
  • the further layer is a resin-bound separating layer A) for the wax-bound layer B) Thermal transfer ink is one, the waxes of the wax-bound layer Have a melting point of 70 to 110 ° C and in both layers A) and B) a wax-soluble polymer is finely dispersed.
  • a separation layer or release layer is used in the present field Understand layer, the release of the thermal transfer ink on the printing process controls the receiving substrate, but does not itself transfer to the substrate becomes.
  • a separating layer does not melt during the printing process, but softens at most and also has high adhesion to the wearer.
  • Waxes of a are particularly preferred in the context of the invention Melting point from 75 to 90 ° C. So in the broadest sense it is a Material that is firm to brittle hard, coarse to fine crystalline, translucent to opaque, but is not glassy, melts above about 70 ° C, but not much Relatively low-viscosity and not stringy above the melting point is. Waxes of this type are natural waxes, chemically modified Waxes and assign them to synthetic waxes.
  • waxes are particularly preferred under the natural waxes vegetable waxes in the form of carnauba wax Candelilla wax, mineral waxes in the form of higher melting ceresin and higher melting ozokerite (earth wax), petrochemical waxes, such as for example petrolatum, paraffin waxes and micro waxes.
  • chemically modified Waxes are especially montan ester waxes, hydrogenated castor oil and hydrogenated jojoba oil is preferred.
  • synthetic waxes are Polyalkylene waxes and polyethylene glycol waxes and from them by oxidation and / or esterification products preferred. Amide waxes are also usable. Specifically, the following are particularly preferred: modified microcrystalline waxes.
  • the framework of the melting point to be observed according to the invention for the used Waxing is critical. If the value falls below 70 ° C, then means that the mechanical anchoring is not sufficient and thus color transfer and color resolution are unsatisfactory. Cause melting points higher than 110 ° C disadvantageously to an increased energy expenditure during the printing process.
  • the waxes used according to the invention are preferably narrow cut "waxes used, the melting and solidification point narrow lie together.
  • the temperature difference is preferably between melting and Freezing point less than about 10 ° C, especially less than about 7 ° C and most preferably less than about 5 ° C.
  • a good example of this is Carnauba wax, whose melting point is around 85 ° C and its solidification point at is about 78 ° C.
  • the waxes indicated lead to a during the printing process desirable low cohesion of thermal transfer ink.
  • the wax materials of the wax-bound thermal transfer ink can be varied Additives are incorporated, such as, in particular, tackifiers in the form of Terpene phenolic resins (such as the commercial products Zonataclite 85 from the company Arizona Chemical) and hydrocarbon resins (such as the commercial products KW resin 61 B1 / 105 from VFT, Frankfurt).
  • tackifiers in the form of Terpene phenolic resins (such as the commercial products Zonataclite 85 from the company Arizona Chemical) and hydrocarbon resins (such as the commercial products KW resin 61 B1 / 105 from VFT, Frankfurt).
  • the coloring can be done by any colorant. It can be pigments, such as especially carbon black, but also solvent and / or binder soluble Colorants such as the commercial product Basoprint, organic color pigments and trade different azo dyes (Cerces and Sudan dyes). Soot applies in Framework of the present invention as particularly suitable.
  • the Thermal transfer color the colorant, in particular color pigment, in an amount of about 10 to 20% by weight.
  • the thermal transfer color of the above-mentioned layer B) of the invention Thermal transfer ribbon, optionally with the additives described above preferably a viscosity, determined with the Rheomat 30 rotary viscometer Rheograph (principle: rotary viscometer, see Bulletin T 304d-7605 from the company Contraves AG Zurich / CH) at a temperature of 100 ° C from about 50 to 200 mPa.s, especially from 70 to 120 mPa.s. Falling below the value of about 50 mPa.s leads to blurring ("spreading"). When the value of 250 mPa.s the desired resolution can be deteriorated.
  • a viscosity determined with the Rheomat 30 rotary viscometer Rheograph (principle: rotary viscometer, see Bulletin T 304d-7605 from the company Contraves AG Zurich / CH) at a temperature of 100 ° C from about 50 to 200 mPa.s, especially from 70 to 120 mP
  • a central feature of the thermal transfer ribbon according to the invention is that that in the two layers A) and B) discussed a wax-soluble polymer is included.
  • “Wax-soluble” is understood here to mean that this polymer is in one liquid wax shows solubility. This is not necessarily “real solutions”, but mostly around stable dispersions. This leads to the fact that Cooling such a solution of the polymer in wax does not phase separate occurs or this polymer is compatible with the wax.
  • the melt index MFI is 25 to 1000 g / 10 min, preferably 400 to 800 g / 10 min (DIN 53735 / ISO 1133, sh. also Römpp-Chemie Lexikon, volume 5, 9th edition, p. 4036, r. Sp.).
  • Wax-soluble polymers in the sense of the invention are characterized in that they are meltable below about 100 ° C and sticky when melted demonstrate.
  • Suitable polymers are e.g. Ethylene-vinyl acetate copolymers, polyamides, Ethylene-alkyl acrylate copolymer, ethylene-acrylic acid copolymers, polyvinyl ether, and polyisobutene and ionomer resins. Of these, ethylene-acrylic acid copolymers are particularly preferred and ethylene vinyl acetate copolymers (EVA).
  • wax-soluble polymers also includes those that already exist Show a certain stickiness in room temperature, such as certain ones Polyisobutenes with an oily, viscous to rubbery consistency. Such Products are sold under the trade name Oppanol (BASF, Germany, cf. Römpp Chemie Lexikon 9th ed., Vol. 4, pp. 3121/3122). To this wax-soluble polymers that are sticky at room temperature also include raw materials the base of polyvinyl ethyl, methyl, and isobutyl ether, which under the Trade name Lutonal are sold (BASF, Germany, see Römpp-Chemie Lexicon, 9th ed., Vol. 3, p. 2566).
  • a special feature of the present invention is the incorporation of the discussed wax-soluble polymer both in layer A) and in the layer B).
  • the wax-soluble polymers can be used individually or as a mixture with one another be used.
  • layer A) and in layer B) the same or different wax-soluble polymers can be used.
  • the wax-soluble polymer in layer B) requires that the Hard waxes used with particular preference, in particular in the form of Ester waxes, are plasticized and the brittleness of the thermal transfer paint or "splinter". Ester waxes are very hard or brittle Waxes, i.e. they can be pulverized when cold. Will this but mixed with the designated wax-soluble polymers, then arise elastic to highly elastic products that can no longer be pulverized.
  • layer A) fulfills the function of a "matt layer”.
  • the Matt layer plays a special role in the context of the invention. It leads to the fact that really matt prints are produced during the thermal printing process. This is based make sure that not only the thermal transfer ink is liquid during the printing process and thus sticks to the substrate, in particular in the form of a paper acceptor, but also the interface softens and noticeable adhesion to the Color layer retains, so that a completely flat transfer of, for example Print symbols on the paper acceptor is not possible. Rather, the Surface of the printed symbols slightly roughened, so that the surface of the symbol appears as a result of light refraction / light diffusion appears matt.
  • layer B) is black Pigment and the separation layer additionally contains carbon black, especially in an amount from about 20 to 50% by weight, which results in that which is written off Thermal transfer ribbon offers sufficient data protection.
  • layer B) is black Pigment and the separation layer additionally contains carbon black, especially in an amount from about 20 to 50% by weight, which results in that which is written off Thermal transfer ribbon offers sufficient data protection.
  • the separation layer Silicic acid incorporated is preferably still. During the production of the layer, this leads to the soot remains finely distributed in the layer and does not sediment out.
  • the thickness of layers A) and B) is not critical.
  • the layer preferably has A) a thickness of about 0.2 to 5 microns, especially about 1 to 3 microns, and the layer B) a thickness of about 1.0 to 10 microns, in particular from about 3 to 6 microns.
  • the Resin binder preferably a solid resin with a softening range in the Framework from about 70 to 200 ° C.
  • the resin is preferably an alkyd, epoxy, Melamine, phenol, urethane and / or polyester or copolyester resins.
  • the carrier of the ribbon according to the invention is not critical.
  • a base film for Thermal transfer ribbons are preferably polyethylene terephthalate foils (PETP) or capacitor papers used.
  • the selection parameters are as high as possible Tensile elongation values and thermal stability with low film thicknesses.
  • the PETP films are available down to about 2.5 ⁇ m, capacitor paper down to about 6 ⁇ m.
  • the thermal print head reaches temperatures of up to 400 ° C, i.e. Temperatures that are above the softening point of PETP. It recommends , when using PETP films on the back of the film, which with the Thermal head comes into contact, a particularly resistant to heat Layer.
  • the coating material consists of In this case, preferably from paraffin, silicone, natural waxes, in particular Carnauba wax, beeswax, ozokerite and paraffin wax, synthetic waxes, in particular acid waxes, ester waxes, partially saponified ester waxes and polyethylene waxes, Glycols or polyglycol, antistatic agents and / or surfactants. If such a rear coating is provided, then there is an undisturbed Heat transfer from the thermal print head to the thermal transfer ribbon with the result that particularly nice prints are achieved.
  • the thermal transfer ribbon according to the invention described above can be varied Make way using standard application methods. This can for example by spraying or printing on a solution or dispersion it with water or an organic solvent as a dispersion or Solvent, by application from the melt, which is especially for the wax-bound thermal transfer ink applies, or by normal application by means of a doctor blade in the form of an aqueous suspension with finely divided therein material to be applied. Concerning. the environmental point of view has The following procedure has proven to be particularly advantageous: First, thin Layer an aqueous suspension of the starting materials of the separation layer on the Carrier applied, which gives rise to layer A) when the water evaporates.
  • the thermal transfer ink can also be used in the form of a melt on the interface using customary application technologies apply, for example with a squeegee.
  • the temperature of each As a rule, the melt should be about 100 to 130 ° C. After the order leaves you just cool the applied materials.
  • thermal transfer ink layer B about 1 to 10 g / m 2 , preferably about 3 to 6 g / m 2 , Separating layer 0.2 to 5 g / m 2 , preferably about 0.5 to 1.5 g / m 2 , carrier film, in particular polyester film of a thickness of about 2 to 8 microns, in particular a thickness of about 4 to 5 microns, and the one mentioned Backside coating in a thickness of approximately 0.01 to 0.2 g / m 2 , in particular approximately 0.05 to 0.1 g / m 2 .
  • the mentioned low cohesion of the thermal transfer ink taking into account the other features mentioned, especially in the preferred embodiment in the form of "tightly cut” waxes leads to a mechanical anchoring of the Thermal transfer ink on the printed substrate, especially the paper.
  • Control "release ability" of the interface This guarantees good edge sharpness, Resolution and high optical density as well as the desirable matte and not shiny expression.
  • any paper i.e. smooth as well as rough papers, with excellent print quality can be used.
  • Those of the invention are particularly advantageous Thermocarbon tapes used in fax machines with relatively good resolution, e.g. Xeroxfax, etc.
  • These thermal transfer ribbons can also be used with particular advantage used in the areas of office printers, franking machines and label printers.
  • a material with the following recipe is applied to a customary carrier made of a polyester with a layer thickness of approximately 6 ⁇ m by means of a doctor blade to form the separating layer:
  • the above material is applied in a solvent dispersion (about 15%, in toluene / isopropanol 80:20) in a dry thickness of about 1.0 ⁇ m.
  • the solvent is evaporated by passing hot air at a temperature of around 100 ° C.
  • the thermal transfer ink is then applied using the following recipe in the form of a melt at a temperature of approximately 105 ° C. using flexographic printing.
  • Example 1 was repeated with the modification that the following recipes were used for the separating layer and the colored layer: Interface: Polyurethane resin 15 parts by weight Polyester resin 25 parts by weight wax soluble polymer (EVA) 30 parts by weight soot 28 parts by weight Silica 2 parts by weight 100 parts by weight Transfer color layer: Paraffin wax 60 parts by weight Ester wax (carnauba wax) 17 parts by weight wax soluble polymer (EVA) 8 parts by weight Soot 15 parts by weight 100 parts by weight
  • Interface Polyurethane resin 15 parts by weight
  • Polyester resin 25 parts by weight wax soluble polymer (EVA) 30 parts by weight soot 28 parts by weight
  • Transfer color layer Paraffin wax 60 parts by weight Ester wax (carnauba wax) 17 parts by weight wax soluble polymer (EVA) 8 parts by weight Soot 15 parts by weight 100 parts by weight

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

Claims (13)

  1. Ruban pour transfert thermique, comportant un support usuel avec une couche, liée par des cires, d'une encre pour transfert thermique, formée sur un côté du support, et avec une autre couche se trouvant entre le support et la couche liée par des cires, caractérisé en ce que l'autre couche est une couche de séparation A) liée par une résine, pour la couche B), liée par des cires, de l'encre pour transfert thermique, les cires de la couche liée par des cires présentent un point de fusion de 70 à 110°C et un polymère soluble dans des cires est finement dispersé dans les deux couches A) et B).
  2. Ruban pour transfert thermique selon la revendication 1, caractérisé en ce que le point de fusion des cires de l'encre pour transfert thermique se situe entre 75 et 90°C.
  3. Ruban pour transfert thermique selon la revendication 1 ou 2, caractérisé en ce que la couche A) contient de 10 à 60 % en poids, en particulier de 20 à 40 % en poids, de polymère soluble dans des cires.
  4. Ruban pour transfert thermique selon l'une des revendication 1 à 3, caractérisé en ce que la couche B) contient de 2 à 20 % en poids, en particulier de 5 à 10 % en poids, de polymère soluble dans des cires.
  5. Ruban pour transfert thermique selon l'une des revendications 1 à 4, caractérisé en ce que l'encre pour transfert thermique de la couche B) présente une viscosité de 50 à 250 mPa.s, en particulier de 70 à 120 mPa.s, mesurée à 100°C au moyen d'un viscosimètre rotatif.
  6. Ruban pour transfert thermique selon au moins l'une des revendications précédentes, caractérisé en ce que les cires de la couche B) sont des cires naturelles sous forme de cire de carnauba et de cire de candelilla, des cires modifiées chimiquement ou des cires dures sous forme de cire microcristalline modifiée, des cires d'esters, des cires de paraffines et/ou des cires synthétiques sous forme de cire de Fisher-Tropsch et de cire de polyéthylène.
  7. Ruban pour transfert thermique selon au moins l'une des revendications 1 à 6, caractérisé en ce que le polymère soluble dans des cires est un copolymère éthylène/acétate de vinyle, un copolymère éthylène/acide acrylique, un polyamide et/ou une résine ionomère.
  8. Ruban pour transfert thermique selon au moins l'une des revendications précédentes, caractérisé en ce que la résine de la couche A) est une résine solide ayant un domaine de ramollissement de 70 à 200°C.
  9. Ruban pour transfert thermique selon la revendication 8, caractérisé en ce que la résine est une résine alkyde, époxy, mélamine, phénolique, uréthanne et/ou polyester.
  10. Ruban pour transfert thermique selon au moins l'une des revendications précédentes, caractérisé en ce que la couche B) contient un piqment noir et la couche A) contient en outre du noir de carbone conducteur et de l'acide silicique.
  11. Ruban pour transfert thermique selon au moins l'une des revendications précédentes 1 à 10, caractérisé en ce que la couche A) a une épaisseur de 0,2 à 5 µm, en particulier de 1 à 3 µm.
  12. Ruban pour transfert thermique selon l'une des revendications 1 à 11, caractérisé en ce que la couche B) a une épaisseur de 1 à 10 µm, en particulier de 3 à 6 µm.
  13. Ruban pour transfert thermique selon au moins l'une des revendications 1 à 12, caractérisé en ce que l'encre pour transfert thermique contient un colorant, en particulier un pigment coloré, en une quantité représentant de 5 à 20 % en poids.
EP96116958A 1995-12-21 1996-10-22 Ruban pour le transfert thermique Expired - Lifetime EP0785086B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19548033A DE19548033A1 (de) 1995-12-21 1995-12-21 Thermotransferband
DE19548033 1995-12-21

Publications (2)

Publication Number Publication Date
EP0785086A1 EP0785086A1 (fr) 1997-07-23
EP0785086B1 true EP0785086B1 (fr) 1999-04-14

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EP96116958A Expired - Lifetime EP0785086B1 (fr) 1995-12-21 1996-10-22 Ruban pour le transfert thermique

Country Status (4)

Country Link
US (1) US5827617A (fr)
EP (1) EP0785086B1 (fr)
CA (1) CA2193023A1 (fr)
DE (2) DE19548033A1 (fr)

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JP3344285B2 (ja) * 1997-06-19 2002-11-11 ソニーケミカル株式会社 熱転写記録媒体
US6358597B1 (en) 1997-08-07 2002-03-19 Pelikan Produktions Ag Thermo-transfer ribbon
DE19820769B4 (de) * 1998-05-08 2004-02-05 Pelikan Produktions Ag Thermotransferband
DE19820779A1 (de) * 1998-05-08 1999-11-11 Pelikan Produktions Ag Egg Thermotransferband
DE202008000724U1 (de) * 2008-01-17 2009-02-26 Barcodat Gmbh Farbband für einen Thermotransferdrucker
US11426974B2 (en) 2018-06-13 2022-08-30 Temptime Corporation Thermal transfer of active ink with dynamic environmental data
US11734539B2 (en) 2021-04-05 2023-08-22 Temptime Corporation Dynamic optical property windows in indicia with sensors
CN114148109B (zh) * 2021-11-09 2023-05-02 焦作卓立膜材料股份有限公司 一种可降解碳带及其制备方法
CN120056625B (zh) * 2025-02-27 2025-10-21 湖南鼎一致远科技发展股份有限公司 具有分层结构的高效激光热转印碳带及其制备方法和应用

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Also Published As

Publication number Publication date
DE19548033A1 (de) 1997-07-03
CA2193023A1 (fr) 1997-06-22
US5827617A (en) 1998-10-27
EP0785086A1 (fr) 1997-07-23
DE59601658D1 (de) 1999-05-20

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