EP0513757A1 - Méthode pour l'impression par transfert thermique et matériaux pour l'impression - Google Patents

Méthode pour l'impression par transfert thermique et matériaux pour l'impression Download PDF

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Publication number
EP0513757A1
EP0513757A1 EP92108070A EP92108070A EP0513757A1 EP 0513757 A1 EP0513757 A1 EP 0513757A1 EP 92108070 A EP92108070 A EP 92108070A EP 92108070 A EP92108070 A EP 92108070A EP 0513757 A1 EP0513757 A1 EP 0513757A1
Authority
EP
European Patent Office
Prior art keywords
layer
colouring
resin
dyeing layer
dyeing
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
EP92108070A
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German (de)
English (en)
Other versions
EP0513757B1 (fr
Inventor
Nobuyoshi Taguchi
Akihiro Imai
Soichiro Mima
Yasuo Fukui
Hiroyuki Matsuo
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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Filing date
Publication date
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Publication of EP0513757A1 publication Critical patent/EP0513757A1/fr
Application granted granted Critical
Publication of EP0513757B1 publication Critical patent/EP0513757B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/382—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

Definitions

  • the present invention generally relates to a printing method, and more particularly, to a thermal transfer printing method capable of printing high quality images on a plain paper sheet, and printing media to be employed for said method.
  • the printing is generally effected by driving the image-receptor, and causing a transfer member to follow the movement through frictional force between the image-receptor and the transfer member.
  • the image-receptor has a double-sheet structure, and an adhesive material is applied onto a reverse surface of a base material formed with an upper dyeing layer so as to be fixed on a support member provided with a lower parting layer, whereby after the printing, the upper layer is separated or peeled off for being fixed on a post-card, etc.
  • the printed image by the dye thermal transfer printing method is formed on the specially prepared paper sheet, and therefore, running cost tends to be high, and printing speed is relatively low, thus preventing said printing technique from spreading widely for general applications.
  • an essential object of the present invention is to provide a thermal transfer printing method and printing media employed therefor, which are capable of providing a pictorial image at high quality which has been obtained only on an expensive special paper up to the present, irrespective of the kind of image-receptors, even when the image is mixed with characters.
  • Another object of the present invention is to provide a thermal transfer printing method and printing media employed therefor as described above, which may be readily adopted in the actual applications in an efficient manner at low cost.
  • a thermal transfer printing method which employs a recording member having a dyeing layer formed partially or totally on a base material by means of painting process or heat transfer process, and at least a tranfer member having a colouring layer to heat-transfer a colouring material of the colouring layer onto the dyeing layer, characterised in that the dyeing layer is mainly comprised of a plastics resin or plastic resins firstly having a glass transition point of 100 °C or less for transferring a colouring material from the colouring layer to the dyeing layer, and secondly having a contacting angle cosine of 0.6 or less without any additives, and thirdly different from a plastics resin which is used for the colouring layer on the transfer member to improve a peeling property.
  • the dyeing layer is thermally transferred partially or totally on the second base material by a thermal recording means such as a thermal head or the like, or a thermal means such as a hot roller or the like.
  • the dyeing layer may be formed partially or totally on the second base material by means of painting or the like.
  • the recording member means any base materials provided with the dyeing layer to be thermally transferred with colouring materials. Then, the colouring materials such as a dye and/or a molten ink of the colouring layer on the transfer member is thermally transferred onto the dyeing layer on the recording member.
  • the molten ink layer is firstly transferred and then the dye layer is transferred.
  • the base material is mostly a pulp paper.
  • the recorded dyeing layer may be thermally transferred onto the final image-receptor such as a pulp paper or the like by means of thermal transferring or thermal setting.
  • the thermal transfer printing method which employs a recording member having a dyeing layer formed partially or totally on a base material by means of painting process or heat transfer process, a tranfer member having a colouring layer, and an image-receptor to heat-transfer a colouring material of the colouring layer onto the dyeing layer and then heat-tansfer or heat-set the recorded dyeing layer to the image-receptor, characterised in that the dyeing layer is mainly comprised of a plastics resin or plastic resins firstly having a glass transition point of 100 °C or less with ease for transferring a colouring material from the colouring layer to the dyeing layer, and secondly having a contacting angle cosine of 0.6 or less without any additives, and thirdly different from a plastics resin which is used for the colouring layer on the transfer member to improve a peeling property.
  • the thermal transfer printing method which employs a dyeing layer transfer member having a dyeing layer formed on a first base material, at least a colouring layer tranfer member having a colouring layer at the surface, and a second base material to heat-transfer the dyeing layer on the first base material partially or totally onto the second base material, then heat-transfer the colouring material of the colouring layer onto the dyeing layer on the second base material, characterised in that the dyeing layer is mainly comprised of a plastics resin or plastic resins firstly having a glass transition point of 100 °C or less for transferring a colouring material from the colouring layer to the dyeing layer with ease, and secondly having a contacting angle cosine of 0.6 or less without any additives, and thirdly different from a plastics resin which is used for the colouring layer on the transfer member to improve a peeling property.
  • the thermal transfer printing method which employs a dyeing layer transfer member having a dyeing layer formed partially or totally on a first base material, at least a colouring layer tranfer member having a colouring layer at the surface, a second base material, and an image-receptor to heat-transfer the dyeing layer on the first base material partially or totally onto the second base material, then heat-transfer the colouring material of the colouring layer onto the dyeing layer on the second base material and thereafter heat-tansfer or heat-set the recorded dyeing layer to the image-receptor, characterised in that the dyeing layer is mainly comprised of a plastics resin or plastic resins firstly having a glass transition point of 100 °C or less for transferring a colouring material from the colouring layer to the dyeing layer with ease, and secondly having a contacting angle cosine of 0.6 or less without any additives, and thirdly different from a plastics resin which is used for the colouring layer on the transfer member to improve a peel
  • the thermal transfer printing method which employs a transfer member having a dyeing layer formed partially or totally on a second base material by painting process, and at least a tranfer member having a colouring layer to heat-transfer the dyeing layer on the base material partially or totally onto the dyeing layer, characterised in that the dyeing layer is mainly comprised of a plastics resin or plastic resins firstly having a glass transition point of 100 C or less for transferring a colouring material from the colouring layer to the dyeing layer with ease, and secondly having a contacting angle cosine of 0.6 or less without any additives, and thirdly different from a plastics resin which is used for the colouring layer on the transfer member to improve a peeling property.
  • the thermal transfer printing method which employs a transfer member having a dyeing layer formed partially or totally on a second base material by painting process, at least a tranfer member having a colouring layer, and an image-receptor to heat-transfer the dyeing layer on the base material partially or totally onto the dyeing layer and then heat-transfer or heat-set the recorded image on or within the dyeing layer to the image-receptor, characterised in that the dyeing layer is mainly comprised of plastics resin firstly having a glass transition point of 100 °C or less for transferring a colouring material from the colouring layer to the dyeing layer with ease, and secondly having a contacting angle cosine of 0.6 or less without any additives, and thirdly different from a plastics resin which is used for the colouring layer on the transfer member to improve a peeling property.
  • pictorical images at high quality which can be obtained only on the expensive special paper may be obtained without selection of the image-receptors, even when the images are mixed with characters.
  • printing less dependent on the quality of paper can be effected onto the bond paper, plain paper, etc. particularly, even with respect to the high speed printing, or high temperature recording, the dyeing layer may be selectively formed or transferred on to the recording member and thus stable colour recording may be effected, and the recorded dyeing layer can be thermally transferred stably onto any image-receptor, without any feeling of disorder as in a coating.
  • the dyeing layer is mainly comprised of plastics resin firstly having a glass transition point of 100 °C or less for transfering a colouring material from the colouring layer to the dyeing layer with ease, and secondly having a contacting angle cosine of 0.6 or less without any additives, and thirdly different from a plastics resin which is used for the colouring layer on the transfer member to improve a peeling property.
  • the dyeing layer contains at least one selected from the group comprising polyvinylbutyral resin and polystyrene resin. More preferably, a low molecular resin may be mixed with the main resin of the dyeing layer to provide softness and low shearing power thereto. Same effect can be obtained by mixing fine particles therewith. Futher, by providing a thermal deformation absorbing layer on the second base material of the recording member, the recording is more stable, and especially in the case of the base material of a thin high molecular film, a thermal deformation on recording can be absorbed, which provides a large effect to registration on colour overlapping recording. Also, by providing the roughness to the surface of the base material, the dyeing layer is easy to be transferred onto the base material.
  • a dyeing layer transfer member 2 which comprises a dyeing layer 42 formed on the first base material, held between a recording base material (the second base material) 41 formed on a drum-like configuration metal 4" and a thermal head 3-1, whereby thermal transfer and recording of the dyeing layer 42 is effected onto a surface layer of the recording member base material.
  • a recording base material the second base material
  • a thermal head 3-1 a thermal head 3-1
  • the base material of the recording member may be formed into a sheet-like shape such as a polyethylene terephthalate film (PET) or the like.
  • the dyeing layer 42 is subjected to selective transfer only for a portion where the dye is printed later or to the transfer for a predetermined whole area.
  • Numeral 2' in Fig. 1 represents the state after the dyeing layer 42 has been transferred.
  • a thermal roller may be used as the thermal head 3-1.
  • a molten ink transfer member 1 having a colouring layer containing a molten ink 12 as a colouring maaterial and the thermal head 3-2, the molten ink is subjected to thermal diffusion transfer into the dyeing layer 42 for printing letter or characters.
  • 11 denotes a base material of the transfer member and 13 is a lubricant heat-resistant layer.
  • a dye transfer member 8 having a colouring layer containing a subliming dye and a thermal head 3-3, the dye layer 82 is subjected to thermal transfer and recording onto the recorded dyeing layer 42 for printing full colour images.
  • 81 denotes a base material of the transfer member and 83 is a lubiricant heat-resistant layer
  • the colouring image recorded in or on the dyeing layer 42 of the recording intermediate member 4 is thermally transferred onto the imagereceptor 5 together with the dyeing layer 42 through employment of a heat roller 7 to be setted thermally.
  • Numeral 6 shows the state where the recorded dyeing layer 42 is provided on the image-receptor 5.
  • Fig. 3 shows a further arrangement for explaining the thermal transfer printing method according to another embodiment of the present invention.
  • a second recording member 4' which comprises the dyeing layer 42 provided on a second thin base material 41 of PET or the like by a printing process or the like.
  • the transfer member 1 provided with a molten ink layer 12 and the thermal head 3-2, the molten ink of the ink layer 12 on the ink transfer member 1 is thermally diffused and transferred into the dyeing layer 42 or on the base material (not provided with any dyeing layer) of the recording member.
  • the portion by the combination of the molten ink transfer member 8 and the thermal head 3-2 is not required.
  • the subliming dye layer 82 on the dye transfer member 8 is thermally transferred and recorded on the dyeing layer portion on the recording portion to print full colouring images.
  • the item recorded on the recording member 4 (the image recorded in or on the dyeing layers 42), onto the image-receptor 5 together with the dyeing layer through employment of a heat roller 7, a high quality image by the dye and molten thermal transfer printing can be obtained without depending on the quality of the material for the image-receptor.
  • Numeral 6 shows the state where the recorded dyeing layer 42 is provided on the image-receptor 5.
  • the molten ink is transferred sufficiently thereon. Further, it is preferable to record the molten ink before recording of dye layer, because very samll amount of the lubricant material may be transferred into the dyeing layer.
  • Fig. 2 shows another arrangement for explaining the thermal transfer printing method according to a second embodiment of the present invention.
  • the dyeing layer transfer member 2 As shown in the transfer member 100, the dyeing layer transfer member 2, the molten ink transfer member 1, and the dye transfer member 8, and referred to in the embodiment of Fig. 1 are formed into one unit. More specifically, the thermal transfer of the dyeing layer, the subliming dye and the molten ink is effected by the same thermal head 3-2.
  • the molten ink layer 12-1 and the dye layer 82 are formed in one color or in a plurality of colors by the face order subsequent to the dyeing layer portions 42. Since the process after the subliming dye has been recorded on the dyeing layer is the same as in the embodiment of Fig. 1, detailed description thereof is abbreviated for brevity, with like parts being designated by like reference numerals.
  • the second base material 41 of the recording member 4 is constructed by winding a head-resistant rubber such as a heat-resistant high polymer film, silicone rubber and the like on the surface of the metal drum 4" or the like.
  • a heat resistant film there is also examplified films composed of resins capable of forming film such as aromatic polyimide (aramide), polyimide, polycarbonate, PET(polyethylene terephthalate), cellophane, etc.
  • the base material 41 comprising a heat-resistant film, it is advantageous for registration on overlapping recording that there is provided a heat deformation absorbing layer on the base material 41.
  • This layer may be comprised of a resin layer with rubber elasticity or a resin layer wity high void content.
  • a resin layer with rubber elasticity SBR (styrenebutadiene rubber) or the one represented by latex thereof are useful.
  • an acrylonitrilebutadiene or the like is useful for the purpose.
  • Additives such as fine particles or the like may be added to the layers.
  • the base material for the recording member comprising a high polymer or high molecular film
  • provision of a rough surface make the dyeing layer easy to be transferred.
  • the rough surface may be formed by addition of particles thereto or by the rubbing paper of roughness No.1000.
  • the dyeing layer transfer member 2 shown in Fig.1 includes a base material 21 and a dyeing layer 42 on said base material 21.
  • a base material 21 for necessary to selectively transfer the dyeing layer from the base material 21 to the base material 41 on the recording member 4 by means of thermal means, and necessary to improve the sensitivity on colour recording, and also necessary to transfer the recorded dyeing layer finally to the image-receptor, it is necessary to maintain the adhesive property of the dyeing layer against the base materials 21 or 41 to be in a state of semi-stability. Therefore, it is desired that the surface energy of at least main resin used for the dyeing layer is smaller, that is, smaller than that where cosine value of the contact angle of the resin without additives indicates 0.6.
  • Fig.4 shows a plot of estimated surface energy of four kinds of resins and PET film.
  • the axis of abscissae indicates a surface tension of test resin and the axis of ordinates indicates a cosine of the contact angles.
  • the cosine of the contact angle in the present invention is defined by the value measured at 45 dyn/cm or more.
  • Fig.4 shows that the cosine values of polyvinylbutyral(PVB) and polystylene(PSt) resins are below 0.6 while those of sarturated polyester(PEs) and AS resin are above 0.6 as similar to that of PET film. Therefore, the PVB and PSt resin are useful for the present invention.
  • the glass transition temperature Tg of the dyeing resin should preferably be as low as possible so long as no problem is brought about in the recording or printing.
  • vinylchroridevinylacetate copolymer resin saturated polyester resin, polyacetal resin such as polyvinylbutyral, acrylic resin, urethane resin, polyamide resin and the like may be used.
  • the dyeing layer preferably has a lower grass-transition temperature Tg of 100 °C or less.
  • the resin used for the dyeing layer different from the main resin used for the colouring layer. THereby, the melting adhesion between the colouring layer and the dyeing layer can be prevented on recording.
  • the glass transition temperature Tg As the system of the dyeing layer and controlling the surface frictional characteristics thereof, it is effective to mixed the above high molecular resin with a low molecular resin.
  • a low molecular resin a general hot melt resin may be used, especially a low molecular polystyrene resin is preferred.
  • the other examples are a low molecular polyethylene, a petroleum resin, a rosin resin, a terpene resin, a cumarone resin, an alicyclic saturated hydrocarbon resin, a ester gum, and high molecular waxes for the purpose.
  • acrylsilicone resin having siloxane methacrylate at the terminal or side chain is effective.
  • the acrylsilicone resin may be modified to have a silane coupling agent comprising an alkoxysilyl group or the like at the terminal chain and acted with trace moisture in the atmosphere to give a resin provided with a siloxane bonding (siloxane-contained, moisture-hardening type resin), which is useful.
  • An acryl (silicone) resin having fluorine methacrylate at the terminal or side chain is also effective. If necessary, these resins may be used with a reaction accelerator.
  • silicone group lubricants for the releasing agent or material to be added to resin, there are available various silicone group lubricants, fluorine group surface-active agent, waxes such as paraffine, and polyethylene, etc., higher fatty group alcohol, higher fatty acid amide and ester, etc.
  • liquid state lubricants dimethyl polysiloxane, methylphenylpolysiloxane, fluorosilicone oil, various denatured silicone oil, reactants of more than two kinds of reactive silicone oils (e.g. reactants of the epoxy modified and the carboxyl or amino modified, etc.) are employed.
  • reaction type of resin and lubricant may be employed, and for example, water soluble polysiloxane graft acrylic resin prepared by subjecting polysiloxane to graft polymerisation with acrylic resin, acrylic silicons (silicone) resin added with siloxane methacrylate at the terminal or chain side or acrylurethane silicone (silicon) resin, etc. are effective.
  • fine particles may be added to the dyeing layer.
  • inorganic fine particles such as silica, titanium white, barium sulfate, zinc oxide, etc. which protrude from the surface of the dyeing layer are very effective for the selective transfer of the dyeing layer and the transfer of the recorded dyeing layer to the image-receptor.
  • the dye transfer member 8 includes a base material 81, a heat-resistant lubricity layer 83 formed on the reverse face of the base material 81, and dye layer 82 provided on the upper face thereof.
  • the base material 81 is made of a high polymer film of 2 to 20 microns in thickness.
  • the PET (polyethylene terephthalate) film is generally employed, but films composed of resins capable of forming films such as aromatic polyimide (aramide), polyimide, polycarbonate, polyphenylene sulfide, polyether ketone, triacetyl cellulose, and cellophane, etc. are also useful for the purpose.
  • resistant films formed by mixing electrically conductive particles such as carbon, etc. into such resins may also be employed.
  • the dye layer 82 is composed of at least a subliming dye and a bonding agent.
  • the subliming dye the dispersing dye, oil soluble dye, basic dye, color former, etc. are used. Particularly, dispersing dyes of indoaniline group, quinophthalone group, dicyano imidazole group, dicyano methine group, tricyanovinyl group, etc. are useful.
  • the bonding agent polyester, polyvinyl butyral, acrylstyrene resin, etc. are employed. If necessary, a lubricant agent and fine particles may be used.
  • the heat resistant lubricity layer 13 is provided to impart a lubricating characteristic between the thermal head 3 and the base material 81 and is formed into the film by the ultra-violet curing resin, liquid state lubricant, inorganic fine particles or the like.
  • the image-receptor or image receiving material 5 may be of the pulp group paper such as the bond paper, plain paper, etc. or it may be of the synthetic paper such as a semi-translucent PET film YUPO, etc. or of a base material prepared by bonding pulp paper with a film.
  • the recording heads 3-1,3-2 and 3-3 normal thermal heads, energizing heads, laser heads, etc. are employed.
  • the recording conditions when the line type thermal head is employed are as follows. Line recording period T: 33ms to 4ms, impression pulse width: 16ms to 2ms, and recording energy E: 8 to 4 J/cm2.
  • the thermal transfer of the recorded dyeing layer onto the image-receptor 5 is effected under such conditions as temperature: about 180°C, speed: 10mm/sec., and pressure 4kg/1cm when the heat roll 7 is employed.
  • a dye layer was formed with ink as described below by a gravure coater so as to be 1 micron in a solid state thickness.
  • ink Indoaniline group disperse dye 2.5 weight parts Acrylstyrene resin 4 weight parts Amide denatured silicone oil 0.02 weight part Toluene 20 weight parts 2-butanone 20 weight parts
  • black molten ink 82 having the compositions as follows was applied to form a film having a thickness of 2 microns in the dried state.
  • a base material is the same as that of the dye layer transfermember. On the base material, a dyeing layer as follows was formed.
  • BL-S polyvinylbutyral resin
  • a low molecular polystyrene Piccolastic A75 from Hercules Inc.
  • the images obtained on the bond paper in the manner as described above were a high quality pictorial image with maximum reflection density of more than 1.8 and black letters with such density of more than 1.5.

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)
EP19920108070 1991-05-13 1992-05-13 Méthode pour l'impression par transfert thermique et matériaux pour l'impression Expired - Lifetime EP0513757B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP10718291 1991-05-13
JP107182/91 1991-05-13

Publications (2)

Publication Number Publication Date
EP0513757A1 true EP0513757A1 (fr) 1992-11-19
EP0513757B1 EP0513757B1 (fr) 1998-09-02

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EP19920108070 Expired - Lifetime EP0513757B1 (fr) 1991-05-13 1992-05-13 Méthode pour l'impression par transfert thermique et matériaux pour l'impression

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EP (1) EP0513757B1 (fr)
DE (1) DE69226806T2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6673744B1 (en) 1998-10-08 2004-01-06 Matsushita Electric Industrial Co., Ltd. Thermal transfer recording image receiving layer and thermal transfer recording image receiver

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0141678A1 (fr) * 1983-11-08 1985-05-15 Dai Nippon Insatsu Kabushiki Kaisha Feuille pour l'impression par transfert thermique
EP0390044A2 (fr) * 1989-03-28 1990-10-03 Dai Nippon Insatsu Kabushiki Kaisha Feuille pour transfert thermique
EP0395014A1 (fr) * 1989-04-27 1990-10-31 Canon Kabushiki Kaisha Matériau pour le transfert thermique et méthode d'enregistrement par le transfert thermique

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0141678A1 (fr) * 1983-11-08 1985-05-15 Dai Nippon Insatsu Kabushiki Kaisha Feuille pour l'impression par transfert thermique
EP0390044A2 (fr) * 1989-03-28 1990-10-03 Dai Nippon Insatsu Kabushiki Kaisha Feuille pour transfert thermique
EP0395014A1 (fr) * 1989-04-27 1990-10-31 Canon Kabushiki Kaisha Matériau pour le transfert thermique et méthode d'enregistrement par le transfert thermique

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 14, no. 549 (M-1055)(4492) 6 December 1990 & JP-A-02 233 293 ( RICOH K.K. ) 14 September 1990 *
PATENT ABSTRACTS OF JAPAN vol. 15, no. 39 (M-1075)30 January 1991 & JP-A-02 277 690 ( RICOH K.K. ) 14 November 1990 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6673744B1 (en) 1998-10-08 2004-01-06 Matsushita Electric Industrial Co., Ltd. Thermal transfer recording image receiving layer and thermal transfer recording image receiver

Also Published As

Publication number Publication date
DE69226806D1 (de) 1998-10-08
EP0513757B1 (fr) 1998-09-02
DE69226806T2 (de) 1999-01-21

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