EP0380920B1 - Thermofarbband, Verfahren zu dessen Herstellung und seine Verwendung - Google Patents

Thermofarbband, Verfahren zu dessen Herstellung und seine Verwendung Download PDF

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Publication number
EP0380920B1
EP0380920B1 EP90100263A EP90100263A EP0380920B1 EP 0380920 B1 EP0380920 B1 EP 0380920B1 EP 90100263 A EP90100263 A EP 90100263A EP 90100263 A EP90100263 A EP 90100263A EP 0380920 B1 EP0380920 B1 EP 0380920B1
Authority
EP
European Patent Office
Prior art keywords
ink ribbon
thermal ink
thermal
polymer spheres
ribbon according
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
EP90100263A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0380920A3 (de
EP0380920A2 (de
Inventor
Norbert Dr. Mecke
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
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 AT90100263T priority Critical patent/ATE97064T1/de
Publication of EP0380920A2 publication Critical patent/EP0380920A2/de
Publication of EP0380920A3 publication Critical patent/EP0380920A3/de
Application granted granted Critical
Publication of EP0380920B1 publication Critical patent/EP0380920B1/de
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
    • 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
    • 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
    • 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 thermal ribbon, with a carrier and a layer of a wax and / or plastic-bound melting ink formed on one side of the carrier for producing scratch-resistant, heat-stable markings by subsequent heat treatment, a particularly suitable method for producing this thermal ribbon and its special use for the production scratch-resistant, heat-stable markings.
  • Thermal ribbons have been known for a long time.
  • a film-like support which can consist of paper, a plastic or the like, they have a melting color which contains a dye or a pigment. These are bound in a plastic or in a wax.
  • the melting ink is melted by means of a thermal print head and transferred to a recording paper or printing paper.
  • Thermal printers or thermal print heads that are used for this process are generally known. In particular, e.g. as follows: on the thermal print head of the printer, a letter consisting of heated dots and to be printed on a paper sheet is formed. The thermal print head presses the thermal ribbon onto the paper to be written on. The melting ink is melted in the heated areas and transferred to the paper sheet. The used part of the thermal ribbon is fed to a spool.
  • the thermal ink ribbon can have different melting colors next to each other. With the combination of the colors blue, yellow, red and black, color printed images can thus be produced.
  • Thermal printers can be operated at high speed (a DIN-A-4 sheet can be printed in about 10 seconds) and without disturbing background noises.
  • thermal transfer printing systems are also generally known.
  • the imprints obtained with the thermal ribbons described above, for example on paper, have the disadvantage that they are not scratch-resistant.
  • the scratch resistance is important in various technical areas, for example in the case of labeled tool parts that are subject to strong mechanical influences.
  • EP-A-0 106 663 describes a thermal printer which includes an image melting station following a thermal transfer station. At the thermal transfer station, a thermal ribbon, which contains a melting ink, is brought into contact with the sheet to be printed. A downstream heat treatment is also provided. This is intended to result in the printed image penetrating into the recording sheet in order to obtain a matt image or an image with reduced gloss.
  • the invention was therefore based on the object of developing the thermal ribbon mentioned at the outset in such a way that it enables the desirable scratch resistance of the symbols printed out in various technical fields.
  • this object is achieved in that the melting ink in the thermal printing process contains non-melting, colorant-containing polymer beads which can be melted in a heat treatment downstream of the thermal printing process.
  • the minimum constituents which are contained in the melting color of the thermal ribbon according to the invention are consequently any binder which can be melted during the printing process.
  • This can be a wax or a wax-like material, as well as a plastic that melts at the printing temperature.
  • a wax or a wax-like material as well as a plastic that melts at the printing temperature.
  • the following are suitable: paraffins, natural waxes, such as carnauba wax, beeswax, ozokerite and paraffin wax, synthetic waxes, such as. Synthetic waxes, ester waxes, partially saponified ester waxes, polyethylene waxes as well as polyglycols. This list is not exhaustive.
  • plastic binders which can be used instead of or in admixture with the waxes.
  • plastic binders which can be used instead of or in admixture with the waxes.
  • the waxes are mixed with these plastics.
  • About 1 part by weight of plastic preferably accounts for about 2 parts by weight of wax.
  • the polymer beads have a diameter of 0.3 to 30 ⁇ m, in particular 1 to 10 ⁇ m.
  • the type of colorant included is not essential, so it can be pigments and / or dyes according to the usual definitions.
  • the content of colorants in the polymer beads is preferably between 10 and 30% by weight, in particular 15 to 20% by weight, a pigment, in particular carbon black, being preferred as the colorant.
  • the polymeric plastic of the colorant-containing polymer beads can consist of polystyrene and styrene copolymers, polyvinyl acetate, polyamide, maleic acid resins, styrene hydrocarbon resins, (meth) acrylates, polyvinyl chloride, phenolic resins, polyvinyl ethers and / or epoxy resins.
  • An important requirement of the invention is that these materials differ in terms of melting point or softening point from the binders, which are a further component of the melting ink. This means that in the thermal printing process the polymer beads or toner particles should not melt, or should only melt insignificantly, while the part of the melting ink which creates the wax and / or plastic bond melts in the thermal printing process.
  • This requirement is met for the plastic in the polymer beads when the melting point or the softening point is between 80 and 200 ° C., in particular 100 to 150 ° C.
  • the thickness of the layer of the melting ink of the thermal ink ribbon according to the invention is not essential for the objective according to the invention. In practical applications, the thickness of the melting ink layer will be 3 to 20, in particular 4 to 10 ⁇ m.
  • polyesters in particular polyethylene terephthalate, polycarbonates, polyamide, polyvinyl compounds, in particular polyvinyl chloride, polyvinyl acetate, polyvinyl alcohol and polyvinyl propionate, polyethylene, polypropylene and polystyrene, are suitable for this purpose.
  • Condenser paper is also suitable, for example.
  • the carrier film will usually have a thickness of about 3 to 12 ⁇ m. Of course, this range can also be more or less far below or exceeded.
  • the type of colorant contained in the polymer beads mentioned is also not critical to achieving the object described above. It can be both inorganic and organic colorants, each in natural or synthetic form.
  • the inorganic colorants are pigments such as carbon black, iron oxide and magnetic pigments.
  • the organic pigments or dyes are those which are known in the toner technology mentioned, for example Nigrosine, phthalocyanine blue.
  • the polymer beads contained in the thermal ink ribbon according to the invention are produced in accordance with the technology which is also used in toner technology. This can be done, for example, by fusing and extruding the colorants and the plastic materials with subsequent granulation and grinding.
  • the production of the thermal ink ribbon according to the invention is advantageously carried out as follows: dispersion in a commercially available aqueous dispersion of the binder, in particular in the form of a mixture of a wax and one during the thermal printing process melting plastic, the colorant-containing polymer particles.
  • the commercial dispersions used are approximately 30 to 50% by weight, in particular approximately 40% by weight.
  • the aqueous dispersion obtained is applied to the support by customary application techniques.
  • the application quantity (based on dry matter) is about 3 to 20 g / m2 of carrier area.
  • a doctor blade can be used for the application.
  • the job can be done at room temperature.
  • the coated carrier is then passed through a drying tunnel in which the aqueous phase of the applied aqueous dispersion is evaporated.
  • a system of meltable wax or meltable plastic / colorant-containing polymer particles in the form of a melt using customary technologies, such as, for example, using a screen printing method.
  • customary technologies such as, for example, using a screen printing method.
  • it is important here that the melting points of the polymer beads and the binder chosen in each case are sufficiently far apart that the polymer beads themselves do not already melt in this application process.
  • a thermal ribbon 1 is shown.
  • the 8 mm thick melting ink 3 is located on the carrier 2 made of polyethylene terephthalate and has a thickness of about 6 ⁇ m. Copolymer is located. This means that the polymer beads 4 are embedded in the binder 5 mentioned.
  • the thermal printing process using a conventional thermal printer produces on the substrate 7, e.g. in the form of a paper, a printed symbol 6, which further contains the binder 5 and the polymer beads 4 in the structure shown in FIG. 1. Thus, the polymer beads 4 are still embedded in the binder 5.
  • An epoxy resin (trade name: EUMPOX R (Schering)) with a melting point of about 120 ° C and carbon black were placed in a heat ratio of 90: 1 in a heatable extruder. The mixture was homogenized at temperatures above the melting point of the epoxy resin. The emerging strand was cut into pieces and ground in a pin mill to a grain size of about 2 to 8 microns.
  • Example 1 was modified in such a way that instead of the epoxy resin with a melting point of about 120 ° C., a commercially available styrene copolymer (trade name: Radiant fusing copolymer / company: Diamond Shamrock) with a melting point of 90 ° C. was used.
  • the weight ratio of styrene copolymer to carbon black was approximately 80:20.
  • the thermal ribbons produced according to Examples 3 and 4 were used in a conventional thermal printer. Label paper has been written. Then this label paper with a Infrared heater heated to around 200 ° C. The polymer beads melted together with the other particles contained in the melting ink to form a closed, uniform and scratch-resistant layer.

Landscapes

  • Thermal Transfer Or Thermal Recording In General (AREA)
  • Impression-Transfer Materials And Handling Thereof (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)
  • Artificial Filaments (AREA)
EP90100263A 1989-02-03 1990-01-08 Thermofarbband, Verfahren zu dessen Herstellung und seine Verwendung Expired - Lifetime EP0380920B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90100263T ATE97064T1 (de) 1989-02-03 1990-01-08 Thermofarbband, verfahren zu dessen herstellung und seine verwendung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3903259A DE3903259C1 (enrdf_load_stackoverflow) 1989-02-03 1989-02-03
DE3903259 1989-02-03

Publications (3)

Publication Number Publication Date
EP0380920A2 EP0380920A2 (de) 1990-08-08
EP0380920A3 EP0380920A3 (de) 1991-02-06
EP0380920B1 true EP0380920B1 (de) 1993-11-10

Family

ID=6373391

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90100263A Expired - Lifetime EP0380920B1 (de) 1989-02-03 1990-01-08 Thermofarbband, Verfahren zu dessen Herstellung und seine Verwendung

Country Status (5)

Country Link
US (1) US5158813A (enrdf_load_stackoverflow)
EP (1) EP0380920B1 (enrdf_load_stackoverflow)
JP (1) JPH0739199B2 (enrdf_load_stackoverflow)
AT (1) ATE97064T1 (enrdf_load_stackoverflow)
DE (2) DE3903259C1 (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230126225A1 (en) * 2020-03-23 2023-04-27 Hewlett-Packard Development Company, L.P. Dye sublimation printing

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4387380A (en) * 1980-03-06 1983-06-07 Canon Kabushiki Kaisha Printer
JPS58219071A (ja) * 1982-06-15 1983-12-20 Tokyo Keiki Co Ltd 熱転写プリンタ装置
JPS59135172A (ja) * 1982-10-20 1984-08-03 ゼロツクス・コ−ポレ−シヨン 熱式記録印刷装置
DE3406470C2 (de) * 1984-02-23 1998-01-15 Kunz Kg Verwendung einer Prägefolie zum Bedrucken von Kunststoffoberflächen
DE3522801C1 (de) * 1985-06-26 1986-10-23 Pelikan Ag, 3000 Hannover Thermofarbband sowie ein Verfahren zu dessen Herstellung
US4783360A (en) * 1985-07-22 1988-11-08 Canon Kabushiki Kaisha Thermal transfer material
JPS62218172A (ja) * 1986-03-19 1987-09-25 Hitachi Maxell Ltd 感熱転写体
DE3635141C1 (de) * 1986-10-15 1988-03-03 Pelikan Ag Thermocarbonband mit einer kunststoffgebundenen Aufschmelzfarbe sowie ein Verfahren zur Herstellung dieses Bandes

Also Published As

Publication number Publication date
DE3903259C1 (enrdf_load_stackoverflow) 1990-05-23
US5158813A (en) 1992-10-27
EP0380920A3 (de) 1991-02-06
JPH02235678A (ja) 1990-09-18
JPH0739199B2 (ja) 1995-05-01
EP0380920A2 (de) 1990-08-08
DE59003381D1 (de) 1993-12-16
ATE97064T1 (de) 1993-11-15

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