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EP2993054B1 - Matériel d'enregistrement sensible à la chaleur en forme de bande ayant au moins deux couches - Google Patents

Matériel d'enregistrement sensible à la chaleur en forme de bande ayant au moins deux couches Download PDF

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Publication number
EP2993054B1
EP2993054B1 EP14183863.1A EP14183863A EP2993054B1 EP 2993054 B1 EP2993054 B1 EP 2993054B1 EP 14183863 A EP14183863 A EP 14183863A EP 2993054 B1 EP2993054 B1 EP 2993054B1
Authority
EP
European Patent Office
Prior art keywords
heat
layer
recording material
ply
sensitive recording
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.)
Active
Application number
EP14183863.1A
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German (de)
English (en)
Other versions
EP2993054A1 (fr
Inventor
Diana Valentina Becerra Siabato
Lena-Maria Grundl
Martin Schreer
Gerhard Stork
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.)
Mitsubishi HiTec Paper Europe GmbH
Original Assignee
Mitsubishi HiTec Paper Europe 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
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Priority to EP14183863.1A priority Critical patent/EP2993054B1/fr
Priority to ES14183863T priority patent/ES2731204T3/es
Publication of EP2993054A1 publication Critical patent/EP2993054A1/fr
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Publication of EP2993054B1 publication Critical patent/EP2993054B1/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
    • B41M5/36—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using a polymeric layer, which may be particulate and which is deformed or structurally changed with modification of its' properties, e.g. of its' optical hydrophobic-hydrophilic, solubility or permeability properties
    • B41M5/366—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using a polymeric layer, which may be particulate and which is deformed or structurally changed with modification of its' properties, e.g. of its' optical hydrophobic-hydrophilic, solubility or permeability properties using materials comprising a polymeric matrix containing a polymeric particulate material, e.g. hydrophobic heat coalescing particles
    • 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
    • B41M5/41—Base layers supports or substrates
    • 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
    • B41M2205/00—Printing methods or features related to printing methods; Location or type of the layers
    • B41M2205/04—Direct thermal recording [DTR]
    • 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
    • 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
    • B41M2205/40—Cover layers; Layers separated from substrate by imaging layer; Protective layers; Layers applied before imaging
    • 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
    • B41M5/124—Duplicating or marking methods; Sheet materials for use therein using pressure to make a masked colour visible, e.g. to make a coloured support visible, to create an opaque or transparent pattern, or to form colour by uniting colour-forming components
    • 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
    • B41M5/26—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
    • B41M5/426—Intermediate, backcoat, or covering layers characterised by inorganic compounds, e.g. metals, metal salts, metal complexes

Definitions

  • the invention relates to a web-shaped heat-sensitive recording material having at least a first layer and a first layer at least partially covering the second layer, the web-shaped heat-sensitive recording material proposed on this side taking into account environmental-friendly aspects to a particular extent.
  • Heat-sensitive recording materials have been known for many years and enjoy a generally unbroken popularity, which, among other things, is due to the fact that their use for the ticket and / or purchase document issuing businessman is associated with great advantages. Since the color-forming components are contained in the recording material itself in the known color-reactive recording materials attributable to the heat-sensitive recording method, the toner and color-cartridge-free thermal printers, which in their function no longer need to be regularly monitored by anyone, can be used in large numbers be set up. Thus, this innovative technology has largely prevailed, especially in public transport and retail.
  • the inventors considered the EP 0 512 114 A1 That as a recording material for a tachograph at least 2-layer sheet proposed with a colored substrate to which an opaque layer from an aqueous suspension containing polymer particles is plotted.
  • a sheet of a paper with a black topcoat is disclosed, wherein paper including topcoat together serve as a colored support and onto which an opaque layer of hollow body pigments is spread.
  • the layer containing the hollow body pigment is scratched open and the underlying black topcoat becomes visible as a typeface.
  • the manipulation of the hollow body pigments to form a typeface their removal which is very easy in their involvement in the top coat due to the low degree of interconnectedness within the top coat having them.
  • the heat-sensitive recording material In order to form the heat-sensitive recording material according to the invention, its first layer with the intensive coloring facing the second layer is first covered with high opacity, that is to say almost opaque, by the second layer with the hollow-body pigments. Because of the opacity of the second layer caused by the hollow-body pigments, no or only little of the coloring of the first layer can be determined.
  • heat in the form of any pattern that is in the form of whatever typeface the hollow body pigments of the second layer are melted, for example by means of the printhead of a thermal printer, as well as the remarks in paragraph [0006] can be found.
  • the fusion or collapse of the hollow body pigments results in an increased light transmission of the second layer.
  • the second layer there are still irregular empty spaces between the molten hollow body pigments and unmelted components which maintain an albeit reduced opacity of that second layer.
  • the additional inclusion of at least one fatty acid amide and / or hydroxymethylated fatty acid amide and at least one heat-sensitive sensitizer in the second layer significantly improves the effect of reducing confused light scattering because the at least one fatty acid amide and / or hydroxymethylated fatty acid amide and the at least one heat-sensitive sensitizer envelop the unmelted components of the second layer and fill the empty spaces within the second layer.
  • externally applied heat such as a thermal head, typeface caused, and background whiteness.
  • Fatty acid amides and hydroxymethylated fatty acid amides can also be used in combination within a preferred embodiment of the present invention, in particular in a mixing ratio of 1: 2 to 2: 1 based on% by weight (atro) in the second layer, within the second layer.
  • the fatty acid amides is preferably stearic acid amide
  • hydroxymethylated fatty acid amides is preferably Methylolstearinklamid.
  • the combination of stearinamide and methylol stearinamide within the second layer is a preferred embodiment of the present invention.
  • the hollow body pigments within the second layer have a wall of plastic, ideally of thermoplastic resin, which melts under high heat input.
  • This thermoplastic resin or the hollow body pigment outer wall itself preferably comprises (meth) acrylonitrile copolymer, polyvinyl chloride, polyvinylidene chloride, polystyrene, styrene acrylate, Styrene (meth) acrylate copolymer, polyacrylonitrile, polyacrylic acid ester or else the mixture of at least two of the components mentioned on.
  • pigment mixtures of different hollow body pigments for the second layer are conceivable.
  • so-called "cup-shaped" pigments in particular also apply as hollow-body pigments.
  • thermoplastic resin of the hollow body pigment outer wall in a range from 35 ° C to less than or equal to 200 ° C and preferably in a range from 75 ° C to less than or equal to 120 ° C has been found advantageous because below temperatures of 35 ° C, the wall of the hollow body pigments is no longer sufficiently stable at room temperature. Above temperatures of 200 ° C, there are handling problems of over heating the surface of the recording material.
  • the preferred temperature range between 75 ° C to less than or equal to 120 ° C provides the simplest conditions in terms of processing quality and speed in the formation of the second layer and its use to create a typeface by merging the hollow body pigments in the form of this typeface, which in the sense of The present invention is to be understood not limited to the mere reproduction of alphanumeric characters, but just as markings of any kind, such as characters, symbols or monochrome or gray-tone images.
  • Suitable binders for incorporation in the second layer of the heat-sensitive recording material proposed herein are, for example, water-soluble binders such as starch, hydroxyethylcellulose, methylcellulose, carboxymethylcellulose, gelatin, casein, polyvinyl alcohols, modified polyvinyl alcohols, ethylene-vinyl alcohol copolymers, sodium polyacrylates, acrylamide-acrylate copolymers, acrylamide Acrylate-methacrylate terpolymers and alkali metal salts of styrene-maleic anhydride copolymer or ethylene-maleic anhydride copolymer, which binders can be used alone or in combination with one another; Also water-insoluble latex binders such as styrene-butadiene copolymers, acrylonitrile-butadiene copolymers and methyl acrylate-butadiene copolymers are suitable as binders for incorporation into the second layer.
  • water-soluble binders such as
  • the second layer generally comprises lubricants, which are preferably waxes such as, and most preferably, zinc stearates and paraffin waxes, as well as other additives, including but not limited to wetting agents and defoamers.
  • lubricants which are preferably waxes such as, and most preferably, zinc stearates and paraffin waxes, as well as other additives, including but not limited to wetting agents and defoamers.
  • the proposed heat-sensitive recording material As a base color for the second layer of the proposed heat-sensitive recording material is particularly white, since heat-sensitive recording materials, especially in their intended and preferred use as a receipt and / or label and / or ticket in white appearance usually are desired in the market. Also, the non-fused hollow body pigments, as long as no further coloring components of the second layer are admixed, appear white.
  • the proposed heat-sensitive recording material can be used without limitation also with a particularly light coloration of the second layer and is consequently regarded as a possible form of the proposed heat-sensitive recording material.
  • the first layer is a mass-dyed web-shaped substrate, to which the substrate in a preferred embodiment carbon black components and / or dyes are added in such an amount that the substrate has an intensive color.
  • the substrate in a preferred embodiment carbon black components and / or dyes are added in such an amount that the substrate has an intensive color.
  • paper is particularly preferred in a range of basis weight between 35 and 180 g / m 2 as the preferred substrate.
  • the substrate carrying the intermediate layer as a first layer can have a coloration.
  • the dyed intermediate layer as the first layer can be applied by printing technology to a substrate acting as the base support, for example in the form of paper or film.
  • this colored intermediate layer is preferably applied to a substrate, wherein it is particularly preferred if the colored intermediate layer is applied with leveling coating devices, such as, for example, roller coater, doctor blade or doctor blade coater. Then, the colored intermediate layer can make a positive contribution to the leveling of the substrate surface, which on the one hand reduces the amount of coating material necessarily applied to form the second layer and on the other hand, the function of the second layer is supported.
  • a fairly wide range between 2 and 10 g / m 2 and preferably between 2 and 7 g / m 2 has proven to be particularly suitable, especially when applied with a doctor blade between 2 and 4 g / m 2 , while in printing technical order of the colored intermediate layer as a first layer values well below 2 g / m 2 then with layer thicknesses preferably between 0.5 .mu.m and 1.5 .mu.m are possible.
  • a range of 200 sec to 500 sec has proven to be suitable, which is why such a range is considered to be preferred in the context of the present invention.
  • the particularly preferred higher values between 300 sec and 500 sec are achieved by smoothing the substrate with applied first layer, for example by means of a two-, three- or Mehrwalzenglättwerks or even by means of a calender.
  • inorganic oil-absorbing white pigments preferably in a range from 20 to 45% by weight, based on the total weight of the intermediate layer, are added to the dyed intermediate layer , which are of great relevance for the external appearance and for the improvement of the later printability.
  • Preferred inorganic white pigments of the intermediate layer are those Proven, selected from the group comprising natural and calcined kaolin, silica, bentonite, calcium carbonate and aluminum hydroxide and especially boehmite here. Also mixtures of several different types of inorganic white pigments are conceivable.
  • the particle size of the inorganic white pigments present in the colored interlayer is preferably in a range of less than 2 ⁇ m. Pigments having a particle size distribution of from 34 to 40% by weight of less than 1 ⁇ m and from 57 to 63% by weight of less than 2 ⁇ m, in each case based on the total amount of white pigments in the intermediate layer, have proved to be advantageous.
  • the intermediate layer preferably has carbon black constituents and / or dyes in an appropriate amount, in the case of carbon black pigments preferably in a range from 30 to 40% by weight, based on the total weight of the intermediate layer.
  • Carbon black pigments having an average particle size of 50 nm have proved to be advantageous.
  • the intermediate layer dyed as the first layer and additionally pigmented contains at least one binder based on a synthetic polymer, with styrene-butadiene latex giving particularly good results, for example.
  • a synthetic binder with the admixture of at least one natural polymer is a particularly suitable embodiment.
  • a binder is highly saponified polyvinyl alcohol.
  • Binder total amount of white pigments and carbon black pigments within the pigmented intermediate layer between 1: 3 and 1: 4 is a particularly suitable embodiment.
  • the first intermediate layer according to the third embodiment mainly comprises white pigments as disclosed in paragraph [0023], binders and others also usual additives. Decisive is their job with a leveling coating device, such as with a doctor blade or (roller) doctor blade coating with subsequent treatment by means of calender and / or calender.
  • the heat-sensitive recording material is quite particularly preferably a second layer at least partially covering the protective layer.
  • the protective layer itself can be applied by means of conventional brushing, for which, inter alia, a coating color is usable, as described above and for which a surface-related mass in a range of 1.5 to 4.5 g / m 2 is preferred, or the protective layer may alternatively be printed. Processing technology and in terms of their technological properties are particularly suitable such protective layers which are curable by means of actinic radiation.
  • actinic radiation UV or ionizing radiation, such as electron beams to understand.
  • a second layer completely or partially covering the protective layer provides as a binder a polyvinyl alcohol, zinc stearate, as a pigment aluminum hydroxide or alternatively also silica and one or more crosslinkers, with particularly preferred amounts for such a protective layer in Table 1 below: ⁇ u> Table 1: ⁇ / u> product % By weight [atro] aluminum hydroxide 10 - 25 polyvinyl alcohol 55 - 70 zinc stearate 7 - 9 crosslinkers 6 - 7
  • a protective layer which completely or partially covers the second layer, it is obtainable from a coating composition comprising at least one polyvinyl alcohol and at least one crosslinking agent. It is preferred if the polyvinyl alcohol of the protective layer according to the third embodiment variant is modified with carboxyl, diacetone or in particular silanol groups. It is also possible to use mixtures of various carboxyl, diacetone or silanol-modified polyvinyl alcohols.
  • the at least one crosslinking agent for the protective layer according to the third embodiment is preferably selected from the group consisting of boric acid, polyamines, epoxy resins, dialdehydes, formaldehyde oligomers, polyamine epichlorohydrin resin, adipic dihydrazide and melamine-formaldehyde. It is also possible to use mixtures of different crosslinking agents.
  • the weight ratio of the modified polyvinyl alcohol to the crosslinking agent is in a range of 20: 1 to 5: 1, and more preferably in a range of 12: 1 to 7: 1 Ratio of the modified polyvinyl alcohol to the crosslinking agent in the range of 100 parts by weight to 8 to 11 parts by weight.
  • the protective layer according to this embodiment additionally contains an inorganic pigment.
  • the inorganic pigment is preferably selected from the group consisting of silicon dioxide bentonite, aluminum hydroxide, calcium carbonate, kaolin and mixtures of said inorganic pigments.
  • the protective layer according to this third embodiment with a basis weight in a range of 1.0 g / m 2 to 6 g / m 2 and particularly preferably from 1.2 g / m 2 to 3.8 g / m 2 apply.
  • the protective layer is preferably formed in one layer, without being limited in this regard.
  • the heat-sensitive recording material according to the invention and having a protective layer is provided as a label with a backside (self) adhesive layer.
  • the usual construction then provides a web-shaped substrate, preferably a paper web, which has a front side and a rear side opposite it.
  • the sheet-shaped heat-sensitive recording material On the reverse side, the sheet-shaped heat-sensitive recording material then has the (self) adhesive layer.
  • a first layer, a second layer at least partially covering the first layer and a protective layer at least partially covering the second layer are applied to the substrate in this order.
  • the adhesive layer may be covered with a release material such as a silicone-containing release paper or the outer layer formed on the second layer protective layer of the recording material according to the invention is provided with an additional release layer, which is preferably applied by means of a so-called five-roller applicator.
  • the release layer in this case has release agents, preferably based on silicone oil.
  • the release layer is curable or crosslinkable under the influence of high-energy radiation, such as UV or electron radiation.
  • high-energy radiation such as UV or electron radiation.
  • the monomers or prepolymers used for the preparation of this layer must contain additives of photoinitiators in a known manner.
  • electron beam curing a particularly uniform over its cross-section, that is cured release layer could be achieved.
  • FIG. 1 shows the basic structure of the web-like heat-sensitive recording material according to the invention with an intense coloration - here uniformly black, for example, soot colors shown - having first layer (1) and a first layer (1) covering the second layer (2).
  • regions (2-1) of the second layer (2) in which the hollow body pigments are fused by heat treatment and why the second layer (2) is translucent at these regions (2-1) are hatched, while the second layer (2) Regions (2-2) of the second layer (2) with non-fused hollow body pigments uniform white - an opaque covering characterizing - are shown.
  • a different representation of translucent and opaque regions of the second layer (2) is dispensed with.
  • the first layer is a mass-dyed web-shaped substrate (11).
  • the second layer (2) is then applied, for which in principle a range with respect to the basis weight between 2 and 10 g / m 2 is considered to be preferred, as very particularly preferred is a range between 4 and 8 g / to look at m 2 .
  • a basis weight of the second layer of less than 2 g / m 2
  • the coverage of the first layer is often no longer adequately ensured, whereas a second layer with a basis weight of well over 10 g / m 2 for economic reasons does not make sense.
  • a protective layer (40) or the printability - if necessary, also in the inkjet process - even further improving pigment coating may be applied.
  • a protective layer weakens the recognition of the formed by heat treatment typeface, but remains at a white or not too dark colored pigment coating and even more so in a preferably colorless designed protective layer, the color from the first layer (1, 11) appearing at the fused points through the second layer to a sufficient extent visible.
  • FIG. 2 shows in this respect, a sheet-like heat-sensitive recording material according to the invention, wherein the recording material is designed in one of its simplest embodiments.
  • the second layer (2) whose hollow body pigments are fused by means of the print head of a thermal printer in the form of a typeface, is applied to a substrate (11) formed as a first layer here, for example with carbon black constituents for coloring the substrate.
  • the second layer (2) completely covers the subjacent substrate (11).
  • the second layer (2) is in turn covered by a protective layer (40).
  • FIG. 3 shows such an embodiment of the proposed heat-sensitive recording material, wherein the recording material in this case, a polyolefin-coated paper as a substrate (10) on which a pigmented intermediate layer (21) is applied as a first layer.
  • the recording material in this case, a polyolefin-coated paper as a substrate (10) on which a pigmented intermediate layer (21) is applied as a first layer.
  • This first layer is covered over the entire area by the second layer (2), whose hollow-chamber pigments are partially fused in the form of a typeface.
  • the second layer (2) is in turn covered by a protective layer (40).
  • the surface mass,% by weight (% by weight) and parts by weight (parts by weight) given in the specification and claims refer to the "atro" weight, respectively. absolutely dry parts by weight.
  • the relevant figures are calculated from the "lutro" weight, i. air-dry parts by weight, less the proportion by weight of water in the interior of the pigments as supplied.
  • the percentages are based on the total weight (atro) of the finished second layer whose basis weight is 5.5 g / m 2 .
  • the thus-finished heat-sensitive recording material is fed to a thermal printer.
  • the second layer hollow body pigments, along with the stearic acid amide and thermosensitive sensitizer, are melted by the print head of the thermal printer according to a predetermined check pattern to form areas in the second layer with fused components and filled intermediate areas and areas with unfused components and unfilled intermediate areas.
  • the thus prepared recording material thus has a very well recognizable, sharp-edged typeface on with blackened areas where the hollow body pigments are fused together in the second layer by the heat input of the printhead of the thermal printer.
  • the blackened areas originate from the uniform color of the intermediate layer, the color of which can be recognized by the transparent areas of the second layer with the hollow body pigments fused there.
  • the whiteness of the heat-sensitive recording material according to the invention is determined once with light, once with no UV content, the measurements being carried out in accordance with the specifications of ISO 2469 / ISO 2470 with the Assuming that the measurements made here use D65 light with a viewing angle of 8 °.
  • the white measurements are carried out using a device of the type Elrepho 3000 (illuminant D 65/10). The values determined are 65% (with UV content) and 66% (without UV), which to a large extent corresponds to a gray paper, but in view of this coating and functional technology this is considered to be acceptable and salable.
  • the respective optical print density is determined before and after the formation of a black-and-white checkered thermo-printout with an Atlantek 400 device from Viex (USA) using a thermal head with a resolution of 300 dpi and an energy per unit area of 16 mJ / mm 2 is used.
  • the respectively non-printed area or the respective thermo-printed area is measured at three locations with the Gretag MacBeth Densitometer TYPE D19C NB / U densitometer (Gretag MacBeth, 8105 Regensdorf, Switzerland).
  • the unprinted areas have a mean optical density of 0.24 ODU (Optical Density Units), and for the thermo-printed areas a mean optical density of 1.28 ODU.
  • ODU Optical Density Units
  • thermo-printed areas a mean optical density of 1.28 ODU.

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Heat Sensitive Colour Forming Recording (AREA)

Claims (10)

  1. Matériau d'enregistrement thermosensible en forme de bande avec au moins une première couche et une deuxième couche recouvrant au moins partiellement la première couche,
    • la première couche présentant une coloration intense au moins face à la deuxième couche et
    • la deuxième couche comprenant des pigments à corps creux, qui peuvent être fondus pour la formation d'une typographie par traitement thermique limité localement,
    caractérisé en ce que la première couche est recouverte de manière presque opaque par la deuxième couche et en ce que la deuxième couche comprend, en plus des pigments à corps creux, également
    • un ou plusieurs amides d'acides gras et/ou des amides d'acides gras hydroxyméthylés et
    • un ou plusieurs sensibilisateurs thermosensibles, les sensibilisateurs thermosensibles étant sélectionnés dans la liste suivante : benzyl-p-benzyloxybenzoate, 2-(2H-benzotriazol-2-yl)-p-crésol, p-benzylbiphényle, 1,2-Di(phénoxy)-éthane, 1,2-Di(m-méthylphénoxy)éthane, 2-(2H-benzotriazol-2-yl)-p-crésol, dibenzyloxalate, benzylnaphthyléther, diméthyltéréphtalate et diphénylsulfone.
    •  
  2. Matériau d'enregistrement thermosensible en forme de bande selon la revendication 1, caractérisé en ce que les pigments à corps creux de la deuxième couche sont fondus sous la forme d'une typographie par un traitement thermique limité localement.
  3. Matériau d'enregistrement thermosensible en forme de bande selon l'une des revendications 1 à 2, caractérisé en ce qu'un rapport, exprimé en % en poids dans la deuxième couche, entre les amides d'acides gras et/ou les amides d'acides gras hydroxyméthylés et les sensibilisateurs thermosensibles, sélectionnés de préférence dans la liste comprenant le benzylnaphthyléther et le 1,2-Di(phénoxy)-éthane, se trouve dans un intervalle de 1:2 à 2:1, l'indication en % en poids se référant à des parties de poids absolument sèches.
  4. Matériau d'enregistrement thermosensible en forme de bande selon l'une des revendications 1 à 3, caractérisé en ce qu'un rapport, exprimé en % en poids dans la deuxième couche, entre la quantité totale de pigments à corps creux et la quantité totale d'amides d'acides gras et d'amides d'acides gras hydroxyméthylés et de sensibilisateurs thermosensibles se trouve dans un intervalle de 1,0:2,5 à 1:4,5, l'indication en % en poids se référant à des parties de poids absolument sèches.
  5. Matériau d'enregistrement thermosensible en forme de bande selon l'une des revendications 1 à 4, caractérisé en ce que les pigments à corps creux de la deuxième couche sont conçus comme des pigments en forme de coupe.
  6. Matériau d'enregistrement thermosensible en forme de bande selon l'une des revendications 1 à 3, caractérisé en ce que la première couche est un substrat en forme de bande coloré dans la masse.
  7. Matériau d'enregistrement thermosensible en forme de bande selon l'une des revendications 1 à 6, caractérisé en ce que le matériau d'enregistrement comprend au moins une couche de protection recouvrant au moins partiellement la deuxième couche.
  8. Matériau d'enregistrement thermosensible en forme de bande selon la revendication 7, caractérisé en ce que l'au moins une couche de protection recouvrant au moins partiellement la deuxième couche comprend au moins les composants suivants :
    - au moins un pigment inorganique,
    - au moins un liant,
    - au moins une cire.
  9. Matériau d'enregistrement thermosensible en forme de bande selon la revendication 8, caractérisé en ce que l'au moins une couche de protection recouvrant au moins partiellement la deuxième couche comprend en outre au moins :
    - des azurants optiques,
    - des agents de réticulation.
  10. Matériau d'enregistrement thermosensible en forme de bande selon l'une des revendications 7 à 9, caractérisé en ce que le matériau d'enregistrement comprend, en tant qu'étiquette, une couche auto-adhésive ou une couche adhésive à l'arrière.
EP14183863.1A 2014-09-06 2014-09-06 Matériel d'enregistrement sensible à la chaleur en forme de bande ayant au moins deux couches Active EP2993054B1 (fr)

Priority Applications (2)

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EP14183863.1A EP2993054B1 (fr) 2014-09-06 2014-09-06 Matériel d'enregistrement sensible à la chaleur en forme de bande ayant au moins deux couches
ES14183863T ES2731204T3 (es) 2014-09-06 2014-09-06 Material de registro termosensible en forma de banda con al menos dos estratos

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EP14183863.1A EP2993054B1 (fr) 2014-09-06 2014-09-06 Matériel d'enregistrement sensible à la chaleur en forme de bande ayant au moins deux couches

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Publication number Priority date Publication date Assignee Title
ES2937111T3 (es) 2020-08-19 2023-03-24 Mitsubishi Hitec Paper Europe Gmbh Material de registro sensible al calor sin revelador
DE102021115909A1 (de) 2021-06-18 2022-12-22 Koehler Innovation & Technology Gmbh Wärmeempfindliche Aufzeichnungsmaterialien
DE102021120941A1 (de) 2021-08-11 2023-02-16 Koehler Innovation & Technology Gmbh Wärmeempfindliches Aufzeichnungsmaterial
WO2023017127A2 (fr) 2021-08-11 2023-02-16 Koehler Innovation & Technology Gmbh Support d'impression thermosensible
DE102021133751A1 (de) 2021-12-17 2023-06-22 Koehler Innovation & Technology Gmbh Wärmeempfindliches Aufzeichnungsmaterial
DE102021133333A1 (de) 2021-12-15 2023-06-15 Koehler Innovation & Technology Gmbh Bahnförmiges wärmeempfindliches Aufzeichnungsmaterial
JP2023172135A (ja) * 2022-05-23 2023-12-06 王子ホールディングス株式会社 感熱記録材料
US11958308B1 (en) 2023-05-31 2024-04-16 G13 Innovation In Production Ltd Thermal paper, and methods and systems for forming the same
WO2025016836A1 (fr) 2023-07-14 2025-01-23 Koehler Innovation & Technology Gmbh Matériau d'enregistrement thermosensible
WO2025242749A1 (fr) 2024-05-23 2025-11-27 Koehler Innovation & Technology Gmbh Matériau d'enregistrement thermosensible

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DE1571845A1 (de) * 1965-07-15 1971-01-21 Kalle Ag Thermographisches Reproduktionsmaterial
GB1208414A (en) * 1966-10-24 1970-10-14 Agfa Gevaert Nv Improvements relating to thermo recording
JP2619728B2 (ja) 1990-01-25 1997-06-11 三水 株式会社 記録紙
WO1992013723A1 (fr) * 1991-02-12 1992-08-20 Scimat Limited Support d'enregistrement
JP4751447B2 (ja) 2005-06-22 2011-08-17 ミツビシ ハイテック ペイパー フレンスブルク ゲゼルシャフト ミット ベシュレンクテル ハフツング 記録材料のためのセキュリティ機能部
US20070065749A1 (en) * 2005-09-21 2007-03-22 Vladek Kasperchik Radiation-markable coatings for printing and imaging
WO2012145456A1 (fr) 2011-04-20 2012-10-26 Rohm And Haas Company Matériau d'enregistrement

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EP2993054A1 (fr) 2016-03-09

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