EP3028866B1 - Matériau d'enregistrement pour un procédé d'impression thermique - Google Patents

Matériau d'enregistrement pour un procédé d'impression thermique Download PDF

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Publication number
EP3028866B1
EP3028866B1 EP14196562.4A EP14196562A EP3028866B1 EP 3028866 B1 EP3028866 B1 EP 3028866B1 EP 14196562 A EP14196562 A EP 14196562A EP 3028866 B1 EP3028866 B1 EP 3028866B1
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EP
European Patent Office
Prior art keywords
layer
recording material
dye
cross
material according
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EP14196562.4A
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German (de)
English (en)
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EP3028866A1 (fr
Inventor
Dr. Christoph Kozlowski
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Schoeller Technocell GmbH and Co KG
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Schoeller Technocell GmbH and Co KG
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Priority to PL14196562T priority Critical patent/PL3028866T3/pl
Priority to EP14196562.4A priority patent/EP3028866B1/fr
Priority to ES14196562T priority patent/ES2791719T3/es
Priority to US14/945,633 priority patent/US9604487B2/en
Priority to CN201510884557.0A priority patent/CN105667115B/zh
Priority to JP2015237210A priority patent/JP6077633B2/ja
Publication of EP3028866A1 publication Critical patent/EP3028866A1/fr
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Publication of EP3028866B1 publication Critical patent/EP3028866B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
    • B41M5/42—Intermediate, backcoat, or covering layers
    • B41M5/44—Intermediate, backcoat, or covering layers characterised by the macromolecular compounds
    • 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
    • B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B41M5/52—Macromolecular coatings
    • B41M5/5236—Macromolecular coatings characterised by the use of natural gums, of proteins, e.g. gelatins, or of macromolecular carbohydrates, e.g. cellulose
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
    • B41M5/42—Intermediate, backcoat, or covering layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
    • B41M5/42—Intermediate, backcoat, or covering layers
    • B41M5/423—Intermediate, backcoat, or covering layers characterised by non-macromolecular compounds, e.g. waxes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • 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
    • B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B41M5/502—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording characterised by structural details, e.g. multilayer materials
    • B41M5/506—Intermediate layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B41M5/52—Macromolecular coatings
    • 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
    • B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B41M5/52—Macromolecular coatings
    • B41M5/5218—Macromolecular coatings characterised by inorganic additives, e.g. pigments, clays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M2205/00—Printing methods or features related to printing methods; Location or type of the layers
    • B41M2205/02—Dye diffusion thermal transfer printing (D2T2)
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M2205/00—Printing methods or features related to printing methods; Location or type of the layers
    • B41M2205/32—Thermal receivers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M2205/00—Printing methods or features related to printing methods; Location or type of the layers
    • B41M2205/36—Backcoats; Back layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M2205/00—Printing methods or features related to printing methods; Location or type of the layers
    • B41M2205/38—Intermediate layers; Layers between substrate and imaging layer

Definitions

  • the invention relates to a recording material for producing photo-quality images using thermal printing processes, in particular using a dye transfer process.
  • the thermal dye transfer (TT) process is used to reproduce a digitally generated image in the form of a printed image, the image quality of which is adapted to the level of silver salt photography.
  • the digital image is selectively prepared with regard to the primary colors cyan, magenta, yellow and black and converted into corresponding electrical signals, which are then converted into heat using the thermal head of a printer.
  • the dye sublimes from the donor layer of an ink ribbon (ink sheet) in contact with the recording material to be printed and diffuses into the receiving layer of the recording material.
  • a recording material In order to achieve photo-quality images, a recording material needs good surface properties, low thermal conductivity, good heat resistance, a so-called compressibility (softness), which is important for ensuring good contact between the thermal head of the printer and the recording material, and good dimensional stability.
  • the recording material must have a good shelf life after printing in order to prevent the migration of the dyes over time into and through the support and thus the deterioration of the image quality.
  • Recording materials for thermal transfer printing have been described many times. They essentially comprise a carrier, a dye-receiving layer and optionally further functional layers. The requirements placed on the material can be optimized by appropriate selection of the components of the recording material.
  • Uncoated or coated papers can be used as supports, synthetic resin-coated papers, in particular polyolefin-coated papers or papers provided with a multilayer plastic film, being particularly suitable. These carriers are described, for example, in EP 0 671 281 A1 , EP 0 681 922 A1 or EP 0 812 699 A1 .
  • the dye-receiving layer contains a resin which has an affinity for the dye from the donor material.
  • a resin which has an affinity for the dye from the donor material.
  • plastics with ester compounds such as polyester resins, polyacrylic acid ester resins, polycarbonate resins, polyvinyl acetate resins, styrene acrylate resins
  • plastics with amide compounds such as polyamide resins
  • polyvinyl chloride and mixtures of the resins mentioned can be used for this purpose.
  • copolymers can also be used which contain at least one representative of the abovementioned polymers as the main constituent, e.g. Vinyl chloride / vinyl acetate copolymer.
  • anticurl layers can be used as further functional layers in order to counteract the curvature of the recording material after it has passed through the thermal printer.
  • Plastic foils for example, which are laminated onto the back of the recording material, are well suited for this.
  • the problem of compressibility can be solved by applying an intermediate layer that fulfills the function of a cushion layer, as in JP 02-274592 or JP 03-268998 described, solved.
  • the in JP 04-21488 described intermediate layer containing hollow microspheres can be a solution.
  • This intermediate layer also has an insulating effect and helps to reduce thermal conductivity.
  • WO 98/10939 A1 describes a recording material for thermal imaging, which has good temperature resistance and low thermal conductivity as well as good compressibility.
  • This object is achieved with the aid of a layer which consists of a gelatin derivatized with ethylenically unsaturated monomers, in particular a (meth) acrylated gelatin.
  • the disadvantage of this recording material is the high coating weight of this layer. Because to achieve the required low thermal conductivity, layer thicknesses of 20 to 100 ⁇ m are necessary. However, the problem of dye migration into the depth of the recording material is not yet solved. A reduction in dye migration can therefore be achieved by curing the layer in an additional operation using a smoothing cylinder.
  • the WO 2011/078406 A1 describes a recording material for thermal transfer printing processes with an intermediate layer in which, for example, gelatin is used as the water-soluble polymer, which may be crosslinked with various crosslinking agents.
  • a recording material for thermal printing processes with a support and a dye-receiving layer equipped for thermal dye transfer, a barrier layer being arranged between the support and the dye-receiving layer and the barrier layer containing gelatin and a water-dispersible polymeric binder, wherein gelatin and the water-dispersible polymeric binders are cross-linked, the gelatin to water-dispersible binder mass ratio being 80:20 to 40:60, the gelatin being an underivatized gelatin, and the water-dispersible polymeric binder being a polyester-polyurethane copolymer.
  • the gelatin in the barrier layer is an underivatized gelatin.
  • the water-dispersible polymeric binder in the barrier layer is a water-dispersible polyester / polyurethane copolymer.
  • a hydrophilic barrier is required to reduce the migration of hydrophobic dyes from the dye-receiving layer.
  • Such a barrier can be a hydrophilic binder coat.
  • a disadvantage of such hydrophilic binder coats is that in thermal printing in climates with high atmospheric humidity a so-called mottle effect, i.e. a cloudiness in the printed image occurs.
  • the barrier layer contains a binder mixture of gelatin and polyester / polyurethane copolymer. It is also surprising that this binder mixture, after crosslinking, avoids the previously mentioned mottle effect.
  • a barrier layer containing gelatin and polyester / polyurethane copolymer consequently not only allows the printing of images with small or mottle-free structures, but also good to very good migration behavior of the recording material.
  • the mass ratio of gelatin to the water-dispersible polymeric binder in the barrier layer is 80:20 to 40:60.
  • the mass ratio of gelatin to the water-dispersible polymeric binder can preferably be 60:40 to 50:50.
  • the polyester polyurethanes used according to the invention are aliphatic polyester polyurethanes. They can be based on an aliphatic isocyanate with a modulus of elasticity 100% according to DIN 53504 of 10 to 14 MPa, preferably 12 to 13 MPa. For example, they can have a melting range of 190 to 230 ° C, preferably 200 to 220 ° C, on the Kofler bench. Suitable polyester polyurethanes can be used in anionic form as a dispersion. The solids content of the dispersion can be 20 to 45% by weight, preferably 28 to 40% by weight. Films made from the polyester polyurethane used according to the invention can have a microhardness according to DIN 53504 of approximately 95 ° Shore A.
  • the tensile strength original of such films according to DIN 53504 can be about 40 MPa and the elongation at break original according to DIN 53504 can be about 400%.
  • Such polyester polyurethanes are commercially available under the name NeoRez® in various types.
  • crosslinking agents can be used for this purpose, which enable a protein to be crosslinked with a polyester-polyurethane copolymer.
  • Suitable crosslinking agents are, for example, imine groups or compounds containing isocyanate groups.
  • the crosslinking of both binders can be achieved with a combination of at least two crosslinking agents.
  • the first crosslinking agent may be a compound containing imine groups and the second crosslinking agent may preferably be a compound having isocyanate groups.
  • the mass ratio of the crosslinking agent containing imine groups to the crosslinking agent containing isocyanate groups can be, for example, 6: 1 to 1: 1.
  • the amount of the crosslinking agent containing imine groups is 5 to 15% by weight, based on the total mass of the binders.
  • the amount of the crosslinking agent containing isocyanate groups in the barrier layer can be 2 to 15% by weight, based on the total amount of the binders.
  • the total amount of the crosslinking agent used according to the invention can be up to 40% by weight, based on the total mass of the binders.
  • the crosslinking agent containing imine groups is preferably a polyaziridine.
  • the crosslinking agent containing isocyanate groups is in particular a blocked isocyanate.
  • the isocyanate can be blocked by an oxime which is split off under the action of temperature.
  • the crosslinking makes the gelatin insoluble in water, and there is also a crosslinking of gelatin with the water-dispersible binder.
  • the barrier layer according to the invention can contain a pigment. Finely divided pigments which increase the opacity of the layer are particularly preferred. Titanium dioxide is particularly suitable for this.
  • the amount of pigment can preferably be up to 30% by weight, but in particular 5 to 25% by weight, based on the mass of the dried layer.
  • the barrier layer according to the invention can optionally also contain other auxiliaries, for example anionic or nonionic surface-active agents, dyes, brighteners, lubricants, antiblocking agents and other customary additives.
  • auxiliaries for example anionic or nonionic surface-active agents, dyes, brighteners, lubricants, antiblocking agents and other customary additives.
  • the amount of auxiliaries can be 0.01 to 5.0% by weight, in particular 0.05 to 3.5% by weight, based on the mass of the dried layer.
  • the binders dissolved or dispersed in water are mixed with one another in the first step.
  • the pH can be adjusted to 7 to 7.5.
  • the pigment dispersion is added and mixed.
  • the crosslinking agent is added. After a subsequent mixing process, the coating composition produced in this way is applied to the carrier material.
  • two crosslinking agents are added to the dispersion described above, it being possible for the second crosslinking agent to be added simultaneously with the addition of the first crosslinking agent or at a time interval therefrom.
  • the coating composition for forming the barrier layer according to the invention can be applied inline or offline with all application units customary in paper production, the amount being selected such that after drying the application weight is at most 3 g / m 2 , in particular 0.5 to 2.5 g / m 2 or, according to a particularly preferred embodiment, 1 to 2 g / m 2 .
  • the carrier used according to the invention can contain or consist of an uncoated or a coated base paper.
  • base paper is understood to mean bulk-sized uncoated paper and / or surface-sized paper.
  • sizing agents such as alkylketene dimers, fatty acids and / or fatty acid salts, epoxidized fatty acid amides, alkenyl- or alkylsuccinic anhydride, wet strength agents such as polyamine-polyamide-epichlorohydrin, dry strength agents such as anionic, cationic or amphoteric polyamides or cationic fillers, optical, fillers, optical, whitening agents, optical, whitening agents, optical fillers , Dyes, defoamers and other auxiliaries known in the paper industry can contain.
  • the base paper can be surface-sized. Suitable glues for this are, for example, polyvinyl alcohol or oxidized starch.
  • the base paper can be produced on a Fourdrinier or a Yankee paper machine (cylinder paper machine).
  • the basis weight of the base paper can be 50 to 250 g / m 2 , in particular 80 to 180 g / m 2 .
  • the base paper can be used in uncompressed or compacted form (smoothed). Base papers with a density of 0.8 to 1.2 g / cm 3 , in particular 0.90 to 1.1 g / cm 3 , are particularly suitable.
  • bleached hardwood kraft pulp LLKP
  • bleached softwood kraft pulp NKP
  • bleached hardwood sulfite pulp LBSP
  • bleached softwood sulfite pulp NBSP
  • Pulp fibers obtained from paper waste can also be used.
  • the cellulose fibers mentioned can also be used in a mixed state and portions of other fibers, for example synthetic resin fibers, can be mixed in.
  • cellulose fibers made from 100% hardwood cellulose are preferably used.
  • the average fiber length of the unground pulp is preferably 0.5 to 0.85 mm (Kajaani measurement).
  • kaolins calcium carbonate in its natural forms such as limestone, marble or dolomite stone, precipitated calcium carbonate, calcium sulfate, barium sulfate, titanium dioxide, talc, silica, aluminum oxide and mixtures thereof can be used as filler in the base paper.
  • a pigment-containing layer can be arranged on the base paper.
  • the pigment can be a metal oxide, silicate, carbonate, sulfide or sulfate. Pigments such as kaolins, talc, calcium carbonate and / or barium sulfate are particularly suitable. Calcium carbonate with a d50% value in the particle size of about 0.7 ⁇ m has proven to be particularly advantageous.
  • the base paper or the coated base paper can be provided on both sides with synthetic resin layers.
  • the synthetic resin layers front and / or rear synthetic resin layer
  • the synthetic resin layers can preferably contain a thermoplastic polymer.
  • Polyolefins for example low-density polyethylene (LDPE), high-density polyethylene (HDPE), polypropylene, 4-methylpentene-1 and mixtures thereof, and polyesters, for example polycarbonates, are particularly suitable for this.
  • the front and / or rear synthetic resin layer contains at least 40% by weight HDPE with a density of more than 0.95 g / cm 3 , in particular 60 to 80% by weight.
  • the synthetic resin layers can contain white pigments such as titanium dioxide and further auxiliaries such as optical brighteners, dyes and dispersing agents.
  • antistatic substances in particular electrically conductive inorganic pigments, are added to the synthetic resin layers.
  • the application weight of the synthetic resin layers can be 5 to 50 g / m 2 , in particular 5 to 30 g / m 2 , but preferably 10 to 20 g / m 2 .
  • the synthetic resin layer can be extruded onto the base paper or the coated base paper in one layer or coextruded in multiple layers.
  • the extrusion coating can be carried out at machine speeds of up to 600 m / min.
  • the carrier contains an uncoated or coated base paper provided with a plastic film, the plastic film being laminated on the side (front side) facing the barrier layer.
  • a polymer layer preferably low density polyethylene (LDPE)
  • LDPE low density polyethylene
  • the thickness of the polyethylene layer is 6 to 15 g / m 2 , in particular 6 to 10 g / m 2 .
  • the plastic film preferably has a multilayer structure with a porous core layer and at least one pore-free surface layer.
  • a biaxially oriented polypropylene film with a thickness of 30 to 60 ⁇ m, in particular 35 to 50 ⁇ m, and an opacity of 70 to 90%, measured according to JIS-P-8148, is particularly well suited for this.
  • a single-layer or multilayer plastic film in particular a biaxially oriented polypropylene film, can also be applied to the back.
  • any dye-receiving layer known from the prior art for thermal transfer processes is suitable as the dye-receiving layer.
  • the layer used according to the invention preferably contains a polymer selected from the group consisting of polyesters, polyacrylic acid esters, polycarbonates, styrene acrylates, vinyl homo- and / or vinyl copolymers. Vinyl polymers such as polyvinyl chloride, vinyl chloride / acrylate copolymer, vinyl chloride / vinyl acetate copolymer and / or vinyl chloride / vinyl acetate / vinylidene chloride are particularly suitable.
  • the dye-receiving layer can contain an inorganic and / or organic pigment.
  • a finely divided inorganic pigment for example silicon dioxide, aluminum oxide, aluminum oxide hydrate, aluminum silicate, calcium carbonate, zinc oxide, tin oxide, antimony oxide, titanium dioxide, indium oxide or a mixed oxide of these oxides, is particularly suitable.
  • the pigments can be present individually or as mixtures in the dye-receiving layer.
  • finely divided silicas in particular finely dispersed silicic acid doped with aluminum, are contained in the layer.
  • the amount of pigment in the dye-receiving layer can be 10 to 90% by weight, in particular 30 to 70% by weight, based on the mass of the dried layer.
  • the finely divided pigment can have an average particle size of 10 nm to 2 ⁇ m.
  • the dye-receiving layer can optionally also contain other auxiliaries, for example anionic or nonionic surface-active agents, matting agents, dyes, crosslinking agents, lubricants, antiblocking agents and other customary additives.
  • auxiliaries for example anionic or nonionic surface-active agents, matting agents, dyes, crosslinking agents, lubricants, antiblocking agents and other customary additives.
  • the amount of auxiliaries can be 0.01 to 10% by weight, in particular 0.05 to 5% by weight, based on the mass of the dried layer.
  • the coating composition for forming the dye-absorbing layer can be applied inline or offline with all application units customary in paper production, the amount being selected such that after drying the application weight is at most 5 g / m 2 , in particular 0.1 to 3 g / m 2 or, according to a particularly preferred embodiment, 0.3 to 1.0 g / m 2 .
  • the coating compositions for forming the barrier layer and the dye-receiving layer can be applied separately, ie first the coating composition produced for forming the barrier layer is applied to the carrier material. In the next step, the coating composition for forming the ink-receiving layer is applied to the dried barrier layer and dried.
  • coating compositions described above can also be applied "wet-on-wet", for example with a multi-layer curtain coating unit.
  • a base paper A was made from eucalyptus pulp.
  • the pulp was ground as an approximately 5% aqueous suspension (thick material) with the aid of a refiner to a grinding degree of 36 ° SR.
  • the concentration of the cellulose fibers in the thin material was 1% by weight, based on the mass of the cellulose suspension.
  • Additives were added to the thin material such as cationic starch in an amount of 0.4% by weight, as a neutral sizing agent alkyl ketene dimer (AKD) in an amount of 0.48% by weight, wet strength agent polyamine-polyamide-epichlorohydrin resin (Kymene®) in an amount of 0.36% by weight and a natural CaCO 3 in an amount of 10% by weight.
  • the quantities given relate to the pulp mass.
  • the thin material the pH of which was adjusted to about 7.5, was transferred from the headbox to the wire of the paper machine, whereupon the sheet formation was carried out with dewatering of the web in the wire section of the paper machine.
  • the paper web was further dewatered to a water content of 60% by weight, based on the web weight. Further drying took place in the dryer section of the paper machine with heated drying cylinders. A raw paper with a basis weight of 132 g / m 2 and a moisture of about 7% was produced.
  • the base paper was coated on the front with a coating slip of a styrene acrylate binder, starch and a pigment mixture of calcium carbonate and kaolin with an application weight of 15 g / m 2 , dried and then with a Calender smoothed.
  • the paper produced in this way has a Bekk smoothness of 800 seconds, measured according to DIN 53107, on the front.
  • the surface of the paper intended for printing was laminated in the extruder after exposure to a corona discharge with a three-layer biaxially oriented polypropylene film (HIPHANE BOPP, Hwaseung Industries Co. Ltd), a film made from low-density polyethylene (LDPE) was extruded between the paper base material and the plastic film.
  • the thickness of the adhesion-promoting polyethylene film was 8 g / m 2 .
  • the cooling cylinder was chosen so that the resulting surface of the back has a roughness of 0.9 ⁇ m, measured as an Rz value according to DIN 4768.
  • the backing material obtained was then coated on the side coated with the plastic film with the coating slips A1 and A2 according to the invention and with the reference coating slips A3 to A6 (25-wire doctor blade) and dried at 78 ° C. for three minutes.
  • the application quantities of the coating slips were chosen so that a dry application (barrier layer) of 1.6 g / m 2 resulted in each case.
  • the dye-absorbing coating slip B was applied to the barrier layers (15-wire doctor blade) and dried (2 minutes, 78 ° C.).
  • the application quantity of the coating slip was chosen so that a dry application of 0.5 g / m 2 resulted.
  • the composition of the coating slips is given in Table 1 below.
  • composition A1 A2 A3 A4 A5 A6 Desalinated water 82.70 82.37 81.45 80.63 79.81 78.34 Gelatine Imagel® AP 71979, 290 Bloom, Isoel.Pkt.
  • the coating composition C 25-wire squeegee
  • the dye-absorbing coating composition B 15-wire squeegee
  • the application of the barrier layer after drying was 1.6 g / m 2 .
  • the application quantity of the coating slip B was chosen so that a dry application of 0.5 g / m 2 resulted.
  • Coating compositions D (Comparative Example 2), E (Comparative Example 3), F (Comparative Example 4) and G (Comparative Example 5) were used to form the barrier layer.
  • the backing material and the dye-absorbing coating composition were as in Examples 1 to 6.
  • the compositions of the coating compositions C to G are given in Table 2 below.
  • composition C. D E F G Desalinated water 83.52 82.85 83.40 82.85 83.40 Gelatine Imagel® AP 71979, 290 Bloom, Isoelektr.
  • the samples are printed with the maximum color densities of yellow, cyan, magenta and black on the Mitsubishi CP-D70DW printer with standard donor ribbon.
  • the print format is 10 x 15 cm and the color areas are 1 x 1 cm.
  • the evaluation is carried out as follows: no color change on the back is rated 1, strong and large color change is rated 5. For this purpose, the relative gradation from grade 1 to grade 5 takes place.
  • the recording materials according to the invention have very good migration behavior for the dyes and no mottle effect after printing. All tested recording materials according to the invention also show an excellent color density of the transferred image.

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Molecular Biology (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)
  • Laminated Bodies (AREA)

Claims (10)

  1. Matériau d'enregistrement pour procédé d'impression thermique comprenant un support et une couche de réception de colorant prévue pour le transfert thermique de colorant, dans lequel une couche de barrière est agencée entre le support et la couche de réception de colorant, et la couche de barrière contient de la gélatine et un liant polymère dispersible dans l'eau, où la gélatine et le liant polymère dispersible dans l'eau sont réticulés l'un avec l'autre, caractérisé en ce que le rapport pondéral de la gélatine au liant polymère dispersible dans l'eau se situe dans l'intervalle allant de 80:20 à 40:60, la gélatine est une gélatine non dérivatisée et le liant polymère dispersible dans l'eau est un copolymère de polyester-polyuréthanne.
  2. Matériau d'enregistrement selon la revendication 1, caractérisé en ce que la réticulation du liant réticulé est réalisée par au moins deux agents de réticulation différents.
  3. Matériau d'enregistrement selon la revendication 1 ou 2, caractérisé en ce que les agents de réticulation sont un composé contenant un groupe imine et un composé contenant un groupe isocyanate, où le rapport pondéral, des deux composés se situe dans l'intervalle allant de 1:1 à 6:1.
  4. Matériau d'enregistrement selon la revendication 3, caractérisé en ce que le composé contenant un groupe imine est une polyaziridine.
  5. Matériau d'enregistrement selon l'une des revendications 3 ou 4, caractérisé en ce que le composé contenant un groupe isocyanate est un isocyanate bloqué.
  6. Matériau d'enregistrement selon l'une des revendications 1 à 5, caractérisé en ce que le matériau support contient un papier brut non enduit ou un papier brut couché et présente une couche de résine synthétique sur la face orientée vers la couche de barrière.
  7. Matériau d'enregistrement selon la revendication 6, caractérisé en ce que la couche de résine synthétique est une couche de polyoléfine extrudée ou une couche polymère appliquée.
  8. Matériau d'enregistrement selon la revendication 7, caractérisé en ce que la feuille polymère est une feuille de polypropylène orientée biaxialement ayant une couche centrale poreuse et au moins une couche de surface sans pore.
  9. Matériau d'enregistrement selon la revendication 7 ou 8, caractérisé en ce que entre la couche de résine synthétique et la couche de barrière est agencée une couche de polyéthylène.
  10. Matériau d'enregistrement selon l'une des revendications 1 à 9, caractérisé en ce que la couche de réception de colorant contient une polymère ayant une affinité pour les colorants du matériau donneur, un pigment inorganique finement divisé et le cas échéant, d'autres auxiliaires.
EP14196562.4A 2014-12-05 2014-12-05 Matériau d'enregistrement pour un procédé d'impression thermique Active EP3028866B1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
PL14196562T PL3028866T3 (pl) 2014-12-05 2014-12-05 Materiał zapisujący dla procesu drukowania termicznego
EP14196562.4A EP3028866B1 (fr) 2014-12-05 2014-12-05 Matériau d'enregistrement pour un procédé d'impression thermique
ES14196562T ES2791719T3 (es) 2014-12-05 2014-12-05 Material de registro para procedimientos de impresión térmica
US14/945,633 US9604487B2 (en) 2014-12-05 2015-11-19 Recording material for thermal printing methods
CN201510884557.0A CN105667115B (zh) 2014-12-05 2015-12-04 用于热敏打印方法的记录材料
JP2015237210A JP6077633B2 (ja) 2014-12-05 2015-12-04 サーマル印字法用の記録材料

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP14196562.4A EP3028866B1 (fr) 2014-12-05 2014-12-05 Matériau d'enregistrement pour un procédé d'impression thermique

Publications (2)

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EP3028866A1 EP3028866A1 (fr) 2016-06-08
EP3028866B1 true EP3028866B1 (fr) 2020-04-29

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EP14196562.4A Active EP3028866B1 (fr) 2014-12-05 2014-12-05 Matériau d'enregistrement pour un procédé d'impression thermique

Country Status (6)

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US (1) US9604487B2 (fr)
EP (1) EP3028866B1 (fr)
JP (1) JP6077633B2 (fr)
CN (1) CN105667115B (fr)
ES (1) ES2791719T3 (fr)
PL (1) PL3028866T3 (fr)

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WO2018160214A1 (fr) * 2017-03-03 2018-09-07 Kodak Alaris Inc. Élément récepteur d'image thermique comportant une couche conductrice de réception de colorant
EP4039486A1 (fr) 2021-02-04 2022-08-10 Schoeller Technocell GmbH & Co. KG Support d'enregistrement pour l'impression à sublimation thermique ayant des propriétés de transport améliorées

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Also Published As

Publication number Publication date
US9604487B2 (en) 2017-03-28
JP6077633B2 (ja) 2017-02-08
PL3028866T3 (pl) 2020-07-27
JP2016107641A (ja) 2016-06-20
CN105667115B (zh) 2018-05-29
EP3028866A1 (fr) 2016-06-08
CN105667115A (zh) 2016-06-15
ES2791719T3 (es) 2020-11-05
US20160159126A1 (en) 2016-06-09

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