EP0304672A1 - Procédé de fabrication d'un ruban à encre thermique pour l'impression par transmission de chaleur, et le ruban à encre thermique obtenu selon ce procédé - Google Patents

Procédé de fabrication d'un ruban à encre thermique pour l'impression par transmission de chaleur, et le ruban à encre thermique obtenu selon ce procédé Download PDF

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Publication number
EP0304672A1
EP0304672A1 EP88112415A EP88112415A EP0304672A1 EP 0304672 A1 EP0304672 A1 EP 0304672A1 EP 88112415 A EP88112415 A EP 88112415A EP 88112415 A EP88112415 A EP 88112415A EP 0304672 A1 EP0304672 A1 EP 0304672A1
Authority
EP
European Patent Office
Prior art keywords
wax
substance
thermal
ribbon
aqueous
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP88112415A
Other languages
German (de)
English (en)
Other versions
EP0304672B1 (fr
Inventor
Albert Schmedes
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
Original Assignee
Pelikan GmbH
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 Pelikan GmbH filed Critical Pelikan GmbH
Priority to AT88112415T priority Critical patent/ATE67448T1/de
Publication of EP0304672A1 publication Critical patent/EP0304672A1/fr
Application granted granted Critical
Publication of EP0304672B1 publication Critical patent/EP0304672B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/382—Contact thermal transfer or sublimation processes
    • B41M5/392—Additives, other than colour forming substances, dyes or pigments, e.g. sensitisers, transfer promoting agents
    • 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.]
    • Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
    • Y10T428/24893—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] including particulate material
    • Y10T428/24901—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] including particulate material including coloring matter

Definitions

  • the invention relates to a method for producing a thermal ink ribbon for thermal transfer printing with a layer of a melting ink on one side of a carrier film, the melting ink containing a wax and / or a wax-like substance, a colorant, a thermoplastic binder and optionally further additives, and one then available product.
  • Thermal ribbons have been known for a long time. They point to a film-like carrier which, for. B. can consist of paper or plastic, a layer of a melting ink, so in the form of a meltable wax-bound or plastic-bound colorant or carbon black layer.
  • the melting ink is melted by means of a thermal print head and transferred to a recording paper or film. This is generally referred to as a thermal transfer ribbon or TCR ribbon ("Thermal Carbon Ribbon").
  • Thermal printers that emboss a heat symbol during the printing process are e.g. B. from DE-ASen 2 062 494 and 2 406 613 and DE-OS 3 224 445 known. The printing process is as follows:
  • the print head of a thermal printer presses the thermal ink ribbon onto the recording substrate.
  • the printhead develops temperatures that can reach a maximum of around 400 ° C.
  • the uncoated back of the thermal ribbon or the film-like carrier is in direct contact with the printhead or the thermal symbol formed thereon during the printing process.
  • the relative speed between the thermal ink ribbon and the printing paper or film is zero.
  • the melting ink in the form of the symbol to be printed is transferred from the thermal ink ribbon to the recording substrate by a melting process.
  • the thermal ink ribbon is detached from the recording substrate, the molten symbol adheres to it and solidifies.
  • thermal ribbons with simple film-like carriers
  • heat symbol is not generated by a thermal print head but by resistance heating of a specially designed film-like carrier.
  • the melting color which represents the actual "functional layer” during the printing process, also contains the materials already described above. In professional circles this is called an electro-thermal transfer process ("Electro Thermal Ribbon”).
  • electro-thermal transfer process Such a thermal transfer printing system is described, for example, in US Pat. No. 4,309,117.
  • thermal ribbons that advertise several times (keyword: "multiuse”). Such thermal ribbons are described for example in EP-AO 063 000.
  • the melting ink of the thermal ink ribbon is then a particulate material which is insoluble in the solvent of the coating liquid and does not melt below 100 ° C, and incorporates another particulate material with a melting point between 40 and 100 ° C.
  • the particulate material not melting below 100 ° C should preferably be a metal oxide, a metal, an organic resin or carbon black.
  • This special particulate material is intended to give the layer of the melting ink, which is a solid mixture, a heterogeneous structure which can only consume a small amount of the molten colored material to be transferred in each individual printing operation.
  • the invention was therefore based on the object of developing the method described at the outset in such a way that it precludes the need to use environmentally harmful solvents in its preparation.
  • this object is achieved in that an aqueous coating dispersion which contains the thermoplastic binder, the wax or the wax-like substance and a fat-soluble dye in finely divided form is applied in a manner known per se to the support of the thermal ribbon, the aqueous portion of the Dispersion evaporated and a thermal treatment is carried out with melting of the wax or the wax-like substance.
  • the essence of the invention is therefore that an aqueous coating dispersion containing the necessary fine-particle solids is applied to the carrier film and the aqueous portion of the dispersion evaporates below the melting point of the integrated wax particles or particles of the wax-like substance and these wax particles or particles of wax-like substance can be fused by thermal treatment.
  • any plastic films are suitable, which are also used as supports for conventional carbon ribbons of typewriters, but which also withstand the high temperatures mentioned during the briefly running printing process and also release the melting ink at these temperatures.
  • the plastic film consists in particular of thermoplastic plastics with a higher glass transition temperature.
  • polyesters used in the prior art in particular polyethylene terephthalates, polycarbonates, polyamides, polyvinyl compounds, in particular polyvinyl chloride, polyvinyl acetate, polyvinyl alcohol and polyvinyl propionate, polyethylene, polypropylene and polystyrene.
  • polyethylene terephthalates and polycarbonates are preferred.
  • the plastic film to be used according to the invention can also be a fabric laminated on one or both sides.
  • similarly designed common composite films can be used within the scope of the invention.
  • plasticizer in order to achieve improved flexibility.
  • a substance that increases the thermal conductivity can also be incorporated.
  • the thickness of the plastic film is determined according to the respective requirements. As a rule, however, it is relatively thin, e.g. B. about 3 to 6 microns to allow the necessary heat transfers to run optimally. This range can also be exceeded or fallen below to a greater or lesser extent.
  • wax used in connection with the invention is to be understood as far as possible.
  • Such a material should generally have the following properties: not kneadable at 20 ° C, solid to brittle-hard, coarse to fine crystalline, translucent to opaque, but not glassy, meltable above 40 ° C without decomposition, but a little above the melting point relatively low-viscosity and non-stringy.
  • wax-like substances should be understood to mean those materials which largely resemble the waxes with regard to the physical and chemical properties.
  • the melting point of the wax or wax-like substance chosen in each case is preferably at least about 70.degree.
  • the upper limit is preferably about 90 ° C.
  • the aqueous coating dispersion contains the mentioned solid particles, i.e. H. the thermoplastic, the wax or the wax-like substance and the fat-soluble dye and the pigment, preferably in a particle size of 0.5 to 100 micrometers and in particular of about 5 to 50 micrometers. Particularly good process products are obtained in this particle size range.
  • the aqueous coating dispersion or suspension of these materials can be prepared in various ways. This can be done, for example, by suspending fine, solid particles of these materials or else by emulsifying in the melt and subsequent cooling, preferably with stirring to maintain the finest dispersion.
  • An essential component of the layer of the melting ink to be formed according to the invention is a thermoplastic.
  • Thermoplastics are hard or even brittle plastics at normal temperature, which soften reversibly when heat is applied and become mechanically easily deformable in order to finally change to a viscous liquid state at high temperatures.
  • thermoplastics which do not melt during the final thermal treatment, or which at most soften at most. Taking this requirement into account, it is easily possible for the person skilled in the art to select suitable thermoplastic binders. These include in particular polystyrene, polyvinyl acetate, polyvinyl acetal, polyvinyl chloride, polyethylene, copolymers of vinyl acetate and vinyl chlorides, polyvinyl ether, polyvinyl propionates, polyacrylates, ethylene / vinyl acetate copolymers.
  • thermoplastic binders serve as a framework substance in the layer of the melting ink designed according to the invention.
  • suitable known plasticizers can also be incorporated into the thermoplastic binder.
  • phthalic acid esters such as di-2-ethylhexyl phthalate, di-isononyl phthalate and di-isodecyl phthalate
  • aliphatic dicarboxylic acid esters such as those of adipic acid, in particular di-2-ethylhexyl adipate and diisodecyl adipate
  • phosphates such as tricresyl phosphate and triphenyl phosphate, such as diethylene glycol, (2-ethyl butyrate) and the like.
  • stabilizers into the thermoplastic binder.
  • the ratio of wax or wax-like substance to the thermoplastic binder in the aqueous coating dispersion can vary widely and is not critical for the purposes of the invention.
  • the weight ratio can easily be between about 10: 1 to 1: 5.
  • a weight ratio of approximately 5: 1 to 1: 1 is preferred.
  • the solids content of the coating dispersion or starting dispersion originally used can also vary within wide limits, for example. B. between about 20 and 80 wt .-%, preferably between about 30 and 60 wt .-%.
  • fat-soluble dyes can be found in the specialist literature.
  • pigments can also be used, such as carbon blacks, organic and / or inorganic color pigments, but also so-called fillers such as chalk, china clay, kaolin, clay, etc.
  • the aqueous coating dispersion can be applied to the support in any manner, for example with a doctor knife.
  • the application technology is therefore not critical. You can also be evaporated or concentrated in any way, for. B. by transferring warm air.
  • the temperature during evaporation or concentration of the aqueous portion of the applied aqueous coating dispersion should preferably be chosen only so high that the wax particles or the particles of the wax-like substance are preferably not melted during the thermal treatment.
  • work can also be carried out at room temperature, whereby the thermal treatment or the passage of the air would require a longer time.
  • the thermal treatment of the product obtained, which is at or above the melting temperature of the wax or the wax-like substance.
  • the wax or the wax-like material is fused by this thermal treatment.
  • This thermal treatment can be carried out using customary measures, for example by treatment with heated rollers, exposure to warm air and thermal radiation. Through this heat treatment, the fat-soluble dye is transferred into the phase of the fused wax or the fused wax-like substance. A particularly high color yield is therefore achieved when using the thermal ink ribbon in conventional writing systems.
  • the layer thickness of the melting ink should generally be between about 5 and 30 micrometers and preferably 10 to 20 micrometers (dry layer). If appropriate, an adhesion-promoting layer with a thickness of approximately 0.1 to 5 micrometers, preferably approximately 0.5 to 2 micrometers, can be arranged between the color layer and the carrier film. This preferably consists of polymeric materials of a known type.
  • aqueous dispersion was prepared using the following recipe: Ethylene-vinyl acetate copolymer (Ehaflex 222-Akzo Chemie) 12 parts by weight solid wax ester (Loxiol G 32 / Henkel) 10 " Streichclay (Colloid Clay Supreme / English China Clay Sales Co) 2.5 " Disazo dye solvent black 3 (Ceress black BN / Bayer AG) 0.5 " distilled water 15 " Silicone defoamer (contrafomit / Baumheier chemical factory) 1 "
  • the dispersion which made up a total of 41 parts by weight, was applied by means of a doctor blade in a layer thickness of approximately 20 micrometers (based on the product which was subsequently dried) to a polyester support.
  • a doctor blade By passing warm air at a temperature of 80 ° C, the aqueous portion of the applied dispersion was evaporated within a few minutes.
  • a thermal treatment was then carried out with air at a temperature of about 100 ° C., the wax particles fusing together.
  • the product obtained could be used directly as a thermal ribbon. It allowed an 8x multiuse.
  • a thermal ribbon was produced using the following recipe: Ethylene-vinyl acetate interpolymer (Adkote 37 R 610 / Morton Chemie) 12 parts by weight Erucic acid amide (Loxamide E / Henkel) 6 " Carbon black (Regal 400 R / Cabot Corp.) 2.5 " Disazo dye solvent Red 18 (Ceresrot 3R / Bayer AG) 0.05 " Disazo dye solvent Black 3 (Neptune Black X 60 / BASF) 0.45 " distilled water 28 "
  • the 49 parts by weight of the dispersion obtained were applied to the support of a thermal ink ribbon in the manner described in Example 1 and dried. This is followed by a thermal treatment with hot air at a temperature of 100 ° C. to fuse the wax particles.
  • the process product obtained also enabled an 8-fold multiuse.

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)
  • Belt Conveyors (AREA)
  • Paints Or Removers (AREA)
EP88112415A 1987-08-22 1988-07-30 Procédé de fabrication d'un ruban à encre thermique pour l'impression par transmission de chaleur, et le ruban à encre thermique obtenu selon ce procédé Expired - Lifetime EP0304672B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88112415T ATE67448T1 (de) 1987-08-22 1988-07-30 Verfahren zur herstellung eines thermofarbbandes fuer den thermotransferdruck und das danach erhaeltliche thermofarbband.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873728076 DE3728076A1 (de) 1987-08-22 1987-08-22 Verfahren zur herstellung eines thermofarbbandes fuer den thermotransferdruck und das danach erhaeltliche thermofarbband
DE3728076 1987-08-22

Publications (2)

Publication Number Publication Date
EP0304672A1 true EP0304672A1 (fr) 1989-03-01
EP0304672B1 EP0304672B1 (fr) 1991-09-18

Family

ID=6334290

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88112415A Expired - Lifetime EP0304672B1 (fr) 1987-08-22 1988-07-30 Procédé de fabrication d'un ruban à encre thermique pour l'impression par transmission de chaleur, et le ruban à encre thermique obtenu selon ce procédé

Country Status (6)

Country Link
US (1) US4950501A (fr)
EP (1) EP0304672B1 (fr)
JP (1) JPS6469388A (fr)
AT (1) ATE67448T1 (fr)
DE (2) DE3728076A1 (fr)
ES (1) ES2024599B3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3935347A1 (de) * 1989-10-24 1991-04-25 Ancker Joergensen As Vorrichtung zum bedrucken eines aufzeichnungstraegers
DE3935348A1 (de) * 1989-10-24 1991-05-02 Ancker Joergensen As Vorrichtung zum bedrucken von aufzeichnungstraegern

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3825438A1 (de) * 1988-07-27 1990-02-15 Pelikan Ag Thermofarbband sowie ein verfahren zu dessen herstellung
AU2004204345B2 (en) * 2003-01-08 2010-02-25 Johnson & Johnson Gmbh Products comprising a sheet and a wax dispersion
CN106274090A (zh) * 2016-08-10 2017-01-04 河南卓立膜材料股份有限公司 一种水性环保型平压树脂基碳带及其制备方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986007311A1 (fr) * 1985-06-07 1986-12-18 Pelikan Akteingesellschaft Procede de fabrication de rubans encreurs thermiques pour impression a transfert thermique et ruban encreur thermique ainsi obtenu
GB2178553A (en) * 1985-07-29 1987-02-11 Canon Kk Thermal transfer material
EP0269585A2 (fr) * 1986-11-26 1988-06-01 Canon Kabushiki Kaisha Procédé d'enregistrement par transfert thermique et milieu d'enregistrement par transfert thermique

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5468253A (en) * 1977-11-09 1979-06-01 Gen Corp Heat sensitive transfer medium
US4238549A (en) * 1978-11-27 1980-12-09 Columbia Ribbon And Carbon Mfg. Co., Inc. Transfer elements
JPS57160691A (en) * 1981-03-31 1982-10-04 Fujitsu Ltd Ink composition for heat transfer recording and heat transfer recording ink sheet employing said composition
JPS5849296A (ja) * 1981-09-18 1983-03-23 Ricoh Co Ltd 感熱転写用記録材料
JPS5957791A (ja) * 1982-09-28 1984-04-03 Fujitsu Ltd 熱転写インクシ−トの製造方法
JPS59145191A (ja) * 1983-02-09 1984-08-20 Fujitsu Ltd インクシ−トの製造方法
JPS59165696A (ja) * 1983-03-11 1984-09-18 Brother Ind Ltd 感熱多数回転写シ−ト及びその製造方法
JPS6049993A (ja) * 1983-08-31 1985-03-19 Toyo Ink Mfg Co Ltd 感熱転写材
US4651177A (en) * 1984-05-31 1987-03-17 Mitsubishi Paper Mills, Ltd. Thermal transfer recording material
US4783360A (en) * 1985-07-22 1988-11-08 Canon Kabushiki Kaisha Thermal transfer material

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986007311A1 (fr) * 1985-06-07 1986-12-18 Pelikan Akteingesellschaft Procede de fabrication de rubans encreurs thermiques pour impression a transfert thermique et ruban encreur thermique ainsi obtenu
GB2178553A (en) * 1985-07-29 1987-02-11 Canon Kk Thermal transfer material
EP0269585A2 (fr) * 1986-11-26 1988-06-01 Canon Kabushiki Kaisha Procédé d'enregistrement par transfert thermique et milieu d'enregistrement par transfert thermique

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3935347A1 (de) * 1989-10-24 1991-04-25 Ancker Joergensen As Vorrichtung zum bedrucken eines aufzeichnungstraegers
DE3935348A1 (de) * 1989-10-24 1991-05-02 Ancker Joergensen As Vorrichtung zum bedrucken von aufzeichnungstraegern

Also Published As

Publication number Publication date
ES2024599B3 (es) 1992-03-01
DE3864953D1 (de) 1991-10-24
EP0304672B1 (fr) 1991-09-18
DE3728076C2 (fr) 1989-11-09
JPS6469388A (en) 1989-03-15
ATE67448T1 (de) 1991-10-15
US4950501A (en) 1990-08-21
DE3728076A1 (de) 1989-03-02

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