EP1543984A2 - Matériau d'enregistrement sensible à la chaleur pour l'impression recto-verso - Google Patents

Matériau d'enregistrement sensible à la chaleur pour l'impression recto-verso Download PDF

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Publication number
EP1543984A2
EP1543984A2 EP04027595A EP04027595A EP1543984A2 EP 1543984 A2 EP1543984 A2 EP 1543984A2 EP 04027595 A EP04027595 A EP 04027595A EP 04027595 A EP04027595 A EP 04027595A EP 1543984 A2 EP1543984 A2 EP 1543984A2
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EP
European Patent Office
Prior art keywords
heat
sensitive recording
atro
recording material
material according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP04027595A
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German (de)
English (en)
Other versions
EP1543984B1 (fr
EP1543984A3 (fr
Inventor
Karsten Lerius
Annette Schreiber
Volker Hiller
Gerhard Dr. Stork
Takao Masuda
Matthias Neukirch
Wolfgang Dr. Wagner
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 HiTech Paper Flensburg GmbH
Original Assignee
Mitsubishi HiTech Paper Flensburg GmbH
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Filing date
Publication date
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Publication of EP1543984A2 publication Critical patent/EP1543984A2/fr
Publication of EP1543984A3 publication Critical patent/EP1543984A3/fr
Application granted granted Critical
Publication of EP1543984B1 publication Critical patent/EP1543984B1/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
    • B41M5/30—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using chemical colour formers
    • 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
    • B41M5/30—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using chemical colour formers
    • B41M5/337—Additives; Binders
    • B41M5/3372—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
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/30—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using chemical colour formers
    • B41M5/337—Additives; Binders
    • B41M5/3377—Inorganic compounds, e.g. metal salts of organic acids
    • 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
    • B41M5/26—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
    • 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

Definitions

  • the present invention relates to heat-sensitive recording materials having a sheet-like substrate, on the first side of which a heat-sensitive recording layer and a protective layer covering the heat-sensitive recording layer are applied.
  • the recording layer contains at least one dye precursor and at least one color acceptor as components which react color-forming with one another under the action of heat.
  • the sheet-shaped substrate On the side of the substrate opposite to the side of the substrate having the recording layer, the sheet-shaped substrate carries a backside coating.
  • the invention relates to the use of the proposed thermosensitive recording material for printing with an analog printing method.
  • the substrate On the reverse side, the substrate carries a coating of water-soluble high polymers, such as starch, gelatin, styrene-maleic anhydride copolymer hydrolysates or polyvinyl alcohol, and of water-insoluble polymers, such as latices. The polymers are used alone or as a mixture.
  • the known backside coating is to prevent that when using the known recording material as a label, in particular plasticizers which are present on a provided with the label sheet can penetrate from the back of the recording layer and thus a weakening or deletion of a possible Effect typeface.
  • the recording layer of the known heat-sensitive recording material contains a very high proportion of calcium carbonate as pigment and a content of binders of polyvinyl alcohol and methyl cellulose which precipitates very small in relation to the pigment content.
  • the barrier layer comprises substantially water-soluble polymer materials such as polyvinyl alcohol, various cellulose ethers, starch, gelatin, casein, and polyvinylpyrrolidone, as well as water-dispersed resins such as polystyrene emulsions.
  • the function of the barrier layer is to protect against materials such as oils and plasticizers which are known to cause discoloration or discoloration of the images developed in the recording layer.
  • the subject of US 2003/0073576 A 1 is a medically transparent light-sensitive recording material whose recording layer is coated with a protective layer.
  • This protective layer is intended to improve the resistance of the known recording material to chemicals, water and light, and preferably consists entirely of a resin for which there are scarcely any limits in the list of names; inter alia, diisocyanate is enumerated as a possible material.
  • pigments are included in the resin of the protective layer, for which all known inorganic pigments appear suitable. If the known recording material to be provided with a backside coating, the components of the protective layer are also considered to be suitable for the backside coating, without which there are exemplary embodiments thereof.
  • this document discloses a color developer based on salicylic acid.
  • the binder content in the recording layer is not limited; up to 65% by weight are considered suitable. No information is given on the proportion of pigments in the recording layer. Surface properties or other uses of the thus proposed recording material are not disclosed.
  • the desired back printing of a heat-sensitive recording material in the offset and flexographic printing process is the reason for the stated object in WO 99/14056 A 1 for a backside coating , compared to the substances used in offset and flexographic printing, especially organic solvents, as well as plasticizers, oils and fats has a good barrier effect.
  • the backside coating of the known recording material comprises a mixture containing starch, a non-styrene or vinyl acetate acrylate copolymer having a film-forming temperature of less than 5 ° C and preferably less than 2 ° C and an alkaline catalyst such as calcium carbonate.
  • thermosensitive recording materials both front side and on the reverse, for example, in the offset process without problems and with high Printing press speeds are to be printed. So for example more economical to produce because faster to print tickets allows the front side next to the heat-induced printed images with individual Entry parameters also contain printed general entry information, while printed on the back general information such as advertising is.
  • the present invention thus provides a first task aspect therein Recording material with front-applied heat-sensitive recording layer to provide the front side over a high durability compared to substances used in offset and flexographic printing and in particular opposite organic solvents, plasticizers, optionally photoinitiators when printing with UV-curing printing inks, oils and greases and simultaneously in offset and flexo printing without problems and at high speeds good to print on.
  • a second aspect of the task is to provide a front-side recording material to provide an applied heat-sensitive recording layer, the in addition to the above-described frontal properties at the same time on his Rear side has a high blocking effect compared to offset and flexo printing Substances and in particular to organic solvents, plasticizers, Oils and fats and the reverse as well as the front side in the offset and flexo printing without problems and with high speeds is printing.
  • the statements made above relate to the% by weight of the color-forming mutually reactive components in the heat-sensitive recording layer on the total solids content (atro) of the heat-sensitive recording layer. Likewise, the statements made relate to the ratio of pigment in% by weight (atro) to binder in% by weight (atro) in each case on the total solids content (atro) the heat-sensitive recording layer.
  • the recording material according to the invention has, in addition to the others Characteristics of claim 1 in particular a particularly high proportion of the color-forming Components dye precursors and color acceptor in the heat-sensitive Recording layer on.
  • the pigment content is in the recording layer deliberately kept low.
  • a preferred embodiment of the proposed recording material sees a proportion of color-forming reacting under the action of heat Components in the heat-sensitive recording layer in a range from 36.5 to 48% by weight (atro) and in particular from 37.5 to 42% by weight (atro) in front.
  • the statements made above relate to the% by weight of the color-forming mutually reactive components in the heat-sensitive recording layer again to the total solids content (atro) of the heat-sensitive recording layer.
  • the ratio of pigment in% by weight (atro) to binder in% by weight (atro) in the heat-sensitive recording layer in a range of 0.65: 1 to 1.45: 1.
  • the information given to the ratio of pigment in wt .-% (atro) to binder in wt .-% (atro) each on the total solids content (atro) of the heat-sensitive recording layer in addition, a ratio of the color-forming components in% by weight (atro) applies to binder in% by weight (atro) in the heat-sensitive recording layer in a range of 1.5: 1 to 12: 1 and especially between 1.85: 1 and 4: 1 as preferred.
  • suitable pigments in the heat-sensitive recording layer apply those that make a good compromise between whiteness, oil absorption behavior and cost-effectiveness represent.
  • preferred examples of particular inorganic oil-absorbing pigments are listed: natural and calcined Kaolin, silicon (di) oxide, bentonite, calcium carbonate, alumina and aluminum hydroxide and here especially boehmite, wherein the pigments individually as well as in combination can be used with each other.
  • As a particularly preferred pigment with the most balanced properties in the context of this invention applies Calcium carbonate.
  • cellulose derivatives such as CMC and plastic dispersions based on acrylate, butadiene styrene, polyvinyl acetate and particularly preferred Polyvinyl alcohol alone or in admixture with each other in the recording layer be used.
  • polyvinyl alcohols are partially or better yet fully saponified polyvinyl alcohols and ethylene-vinyl alcohol copolymers considered suitable.
  • the coating color used to form the thermosensitive recording layer is aqueous.
  • the subsequent drying of the coating color can be done by means of infrared radiation.
  • hot-air floating dryers and contact dryers such as drying cylinders. At the same time cylinder.
  • the different drying options can be combined in any kind and order.
  • an average particle size in one is recommended Range of greater than 0.3 microns to a maximum of 1 .mu.m, in particular from 0.45 .mu.m to 0.9 microns. The limits will be up due to too low sensitivity and down by an otherwise excessive tendency of the heat-sensitive recording material specified for graying.
  • the invention relates to an irreversible thermosensitive recording material contained in the recording layer form a permanent color or typeface under the influence of heat can.
  • the novel recording material has a protective layer covering the heat-sensitive recording layer, which preferably completely covers it.
  • the protective layer performs a task, as it must also be partially fulfilled by the backside coating, namely on the one hand, the protection of the arranged under her recording layer from environmental influences such as oils, fats, water and plasticizers and on the other the improvement of printability, especially in the offset and flexographic printing.
  • it preferably contains the ink-receptive pigments and is designed particularly gap-resistant.
  • the protective layer itself can be applied by means of conventional brushing or, alternatively, printed, with a surface-related mass in a range from 0.5 to 4.5 g / m 2 being preferred. Processing technology and in terms of their technological properties are particularly suitable such protective layers that are crosslinkable and crosslinked by high-energy radiation.
  • high-energy radiation means heat, IR, UV or ionizing radiation, such as electron beams.
  • an intermediate layer is expediently arranged, which contains in addition to binder inorganic oil-absorbing and optionally also organic (hollow body) pigments.
  • inorganic oil-absorbing pigments include natural and calcined kaolin, silicon (di) oxide, bentonite, calcium carbonate, aluminum oxide and aluminum hydroxide, in particular boehmite, where the pigments can be used individually as well as in combination with one another.
  • an intermediate layer acts as a heat reflector which reflects the heat emitted by the thermal head, the recording layer and previously which penetrates covering protective and printing layers, focused on the heat-sensitive recording layer.
  • the intermediate layer can furthermore make a positive contribution to the leveling of the substrate surface, with the result that the amount of coating color necessarily to be applied for the heat-sensitive recording layer can be further reduced if necessary. For this reason, offer to coat the intermediate layer leveling strokes, such as Walzenstreichwerke, doctor blade or (roll) doctor blade coating.
  • the pigments of this intermediate layer can absorb the heat-liquefied wax components of the thermosensitive recording layer in the typeface formation, thus promoting a safe and rapid operation of the heat-induced recording.
  • the preferred intermediate layer also comprises at least one oil or wax-absorbing pigment.
  • the basis weight of the pigmented intermediate layer is preferably between 5 and 20 g / m 2 and more preferably between 7 and 10 g / m 2 (atro).
  • the ratio between Both types of pigment made a compromise of the two types of pigments Effects that is particularly advantageous when the pigment mixture to 15 to 50% by weight, more preferably 18 to 25% by weight, of organic and 85 to 50% Wt .-% and more preferably to 82 to 75 wt .-% of inorganic pigment.
  • the particle size of the organic pigments present in the intermediate layer is in a range from 0.75 ⁇ m to less than 1.5 ⁇ m, preferably in a range from 0.8 ⁇ m to 1.1 ⁇ m. Particle sizes below 0.75 microns prohibit due to rheological processing difficulties. Particle sizes above 1.5 microns show too coarse-grained behavior and prevent a preferred leveling effect of the intermediate layer.
  • the particle size is ideally less than 2 ⁇ m, determined as the D 50 value. Pigments which have 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 have proved to be advantageous.
  • the recording material according to the invention a backside coating with at least one as crosslinker acting substance containing diisocyanate as an effective component. Especially it is preferred if such a crosslinker based on hexamethylene diisocyanate is provided as an effective component.
  • a coating color for the backside coating which over a comparatively long Period is stable, which means that it will not become overly bacterial and / or thickening.
  • the recording material of the invention has in a preferred Embodiment, a backside coating of a coating color, the is stable to storage over 3 days with moderate stirring before its application and thereby also does not start to harden.
  • Hexamethylene diisocyanate includes the backcoat binder and in particular starch, styrene butadiene latex and carboxy-methyl cellulose. Also the mixture of different binders in sometimes highly divergent mixing ratios is possible and preferred. Furthermore, optical brighteners and defoamers customary additives according to the respective requirements.
  • the backside coating is preferred from 1 to 7% by weight of (atro) starch and, with particular preference, cationic cornstarch and from 4 to 15% by weight of (styrene) styrene-butadiene latex while carboxy-methylcellulose only in areas below 0.5 wt .-% (atro) input into the binder mixture place.
  • Particularly positive results can be achieved with a coating weight for the backcoat in a range of 2 to 15 g / m 2 , preferably in a range of 8 to 12 g / m 2 .
  • a coating weight for the backcoat in a range of 2 to 15 g / m 2 , preferably in a range of 8 to 12 g / m 2 .
  • particularly suitable brushing particularly equalizing application devices such as doctor blade and (roll) doctor blade coater and Walzenstreichwerke into consideration, without being limited in any way.
  • the inventors recognized that a particularly high quality print image the back of the heat-sensitive recording material of the invention win, if the backside coating is formed in two layers of the first, oriented towards the substrate layer as a pure binder pigment coating may be formed, while the second outer layer acting as a crosslinker Substance with diisocyanate or even better with hexamethylene diisocyanate as contains effective component. In this case it is possible that only one layer with a leveling applicator is applied, while for the second Location as an application device also air brush and curtain coater offers.
  • a paper web is suitable, even if the invention not limited to paper as a substrate.
  • This is paper sized in the mass to a particular extent preferred.
  • the paper can the side, which is optional with the pigmented interlayer as well as with the recording layer is to be provided with a polyolefin coating for sealing be provided.
  • the present invention also encompasses the use of the invention heat-sensitive recording material in all its proposed Embodiments and variants in the form of its printing with an analog printing method, selected from the group comprising offset printing, gravure printing, screen printing and flexographic printing.
  • the printing can be done on the front and / or back for example for the production of advertising information tickets, Receipts or purchase receipts, guarantee certificates, public transport tickets Transportation such as buses, trains, ships, planes, as well as for ski lifts.
  • a paper web of bleached and ground hardwood and softwood pulps with a mass per unit area of 67 g / m 2 is prepared as substrate with the addition of customary admixture substances in conventional amounts.
  • customary admixture substances in conventional amounts.
  • a mixture of different tree resins is used in an amount of 0.5% by weight (atro) based on the total solids content (atro) of the paper web.
  • An intermediate layer of 9 g / m 2 is applied to the substrate on the front side by means of a doctor blade applicator within the paper machine.
  • the intermediate layer comprises a pigment mixture of 20% by weight (atro) organic pigment having a particle size (D50) of 1 ⁇ m and 80% by weight (atro) calcined kaolin having a particle size (D50) of 0.9 ⁇ m and an oil absorption of 110 cm 3 / 100g.
  • the intermediate layer further comprises a binder mixture of 75% by weight of styrene-butadiene latex and 25% by weight of starch, respectively (atro).
  • thermosensitive recording layer containing a colorant and color acceptors having a basis weight of 3.0 g / m 2 and a protective layer of 1.9 g / m 2 are applied to the intermediate layer in this order .
  • the formulation for the protective layer in all three cases provides as pigment a highly purified, alkaline-treated bentonite with platelet structure, whose intrinsic adhesion enables its fixation with low binder requirement and whose specific surface area in the non-dispersed state is given as 85 m 2 / g in one area Edge ratio, which in the powdered bentonite ranges from 20 to 50.
  • a binder / pigment ratio of 6: 1 and a crosslinker / binder ratio of 1: 5 are set.
  • the crosslinking agent used is polyamide-epichlorohydrin resin
  • the binder used is the aqueous dispersion of a self-crosslinking copolymer of acrylonitrile, methacrylamide and acrylic ester.
  • the coating composition for the preparation of the protective layer contains as further components a defoamer, as a lubricant stearic acid and various dispersants on the one hand for the pigment and on the other hand for the lubricant.
  • inventive examples 1 and 2 is in the heat-sensitive Recording layer, a proportion of under the action of heat color forming with each other Reactive components of 40.39 wt .-% and 38.64 wt .-% (atro) found in Comparative Example 3, this proportion is only 30.50 wt .-% (atro).
  • the ratio formed in the heat-sensitive recording layer Pigment in wt .-% (atro) to binder in wt .-% (atro) is in the inventive Examples 1 and 2 at 1.33: 1 and 0.71: 1, in Comparative Example 3 this is Value 2.03: 1. To determine the gap strength, the offset printing process occurring high adhesion forces are simulated.
  • each of the patterns of the recording material to be examined is placed on a glass plate with the back side.
  • Each approximately 25 cm long adhesive film strip (Scotch 810 Magic Tape, Item No. 11257) is adhered to the protective layer of the recording material by means of a Finat standard pressure roller with a mass of 2 ⁇ 0.05 kg, after gluing the adhesive film strip is still 3 times the pressure roller over the adhesive film strip.
  • the orientation of the adhesive film strip must be in the machine direction of the recording material. When machine direction is considered in the production of a recording paper, the direction of the paper web in the paper or coating machine. Furthermore, the adhesive film strip must not protrude beyond the edges of the pattern.
  • the adhesive film strip should be evenly drawn from the pattern at an angle of 45 ° beginning with the last end glued on.
  • the detached adhesive film strip is glued onto a black cardboard sheet.
  • the break-off point on the respective sample is coated with a solvent tincture. If residues of the sample torn out of the black cardboard sheet (individual particles, smaller or larger protective layer and / or recording layer fragments) or discoloration reactions in the area of the tear-off point appear in reaction to the applied solvent tincture, the nip strength of the respective recording material pattern is low and the test results are considered bad. Without a splitting of the recording material pattern only a few or even no particles or layer fragments are torn out and the layer structure of the recording material is retained. There are little or no discoloration reactions in the area of the breakpoint in response to the applied solvent tincture and the test results are considered to be good.
  • the following coating compositions are prepared for the respective formation of a backcoat according to the second Table of Recipes to be taken from the following Table 2 and using a doctor blade with a basis weight of 10, 1 g / m 2 applied to the back of the substrate.
  • Too high viscosity can not be used 8th 7.5 250 after a day Bad 9 7.5 640 after 3 hours Well 10 6.9 1800 after 3 hours Unsatisfactory 11 8.3 430 after 3 hours Unsatisfactory 12 7.1 590 after 3 hours Unsatisfactory 13 7.4 470 after 3 hours Bad 14 7.3 40 after 2 days Well 15 6.8 150 after 2 days Bad Low fraction formation in coating color 16 7.5 Firmly Bad Solid sediment 17 7.2 25 after 2 days Moderately moderate Strong fractionation with solid sediment 18 7.4 80 after 2 days Bad Strong faction formation in coating color 19 7.1 20 after a day Well 20 5.6 210 after a day Bad 21 8.8 20 after a day Bad 22 6.4 20 after a day Moderate 23 6.7 20 after a day Bad 24 5.7 290 after 3 hours Still good 25 5.5 10000 after 3 hours Bad Wg.
  • Too high viscosity can not be used 26 --- Firmly --- No leaf 27 5.5 75 after 3 hours Moderate No homogeneous coating color possible, slight agglomeration 28 5.6 80 after 3 hours Bad 29 7.3 650 after 3 hours Well 30 6.5 170 after 3 hours Bad 31 8.9 20 after 3 hours Bad Fraction formation in coating color, no homogeneous application possible 32 7.2 20 after 3 hours Moderate Fraction formation in coating color, no homogeneous application possible 33 7.1 20 after 3 hours Bad Fraction formation in coating color, no homogeneous application possible

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  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Heat Sensitive Colour Forming Recording (AREA)
EP04027595A 2003-12-18 2004-11-19 Matériau d'enregistrement sensible à la chaleur pour l'impression recto-verso Expired - Lifetime EP1543984B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10359978 2003-12-18
DE10359978 2003-12-18

Publications (3)

Publication Number Publication Date
EP1543984A2 true EP1543984A2 (fr) 2005-06-22
EP1543984A3 EP1543984A3 (fr) 2006-02-08
EP1543984B1 EP1543984B1 (fr) 2009-02-25

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EP04027595A Expired - Lifetime EP1543984B1 (fr) 2003-12-18 2004-11-19 Matériau d'enregistrement sensible à la chaleur pour l'impression recto-verso

Country Status (4)

Country Link
EP (1) EP1543984B1 (fr)
AT (1) ATE423682T1 (fr)
DE (1) DE502004009042D1 (fr)
ES (1) ES2321399T3 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008057270A1 (de) * 2008-11-13 2010-05-20 Kanzan Spezialpapiere Gmbh Aufzeichnungsmaterial
WO2019229179A1 (fr) * 2018-05-30 2019-12-05 Mitsubishi Hitec Paper Europe Gmbh Matériau d'enregistrement thermosensible comportant une face arrière brillante et imprimable et procédé de production d'un matériau d'enregistrement thermosensible
DE112009003792B4 (de) * 2008-12-26 2020-10-15 Mitsubishi Paper Mills Limited Thermisches Aufzeichnungsmaterial und Verfahren zu dessen Herstellung

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5543382A (en) * 1993-12-27 1996-08-06 New Oji Paper Co., Ltd. Heat-sensitive recording paper
JP2000318319A (ja) * 1998-12-02 2000-11-21 Mitsubishi Paper Mills Ltd 情報記録材料
JP4038929B2 (ja) * 1999-03-29 2008-01-30 王子製紙株式会社 両面記録媒体

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008057270A1 (de) * 2008-11-13 2010-05-20 Kanzan Spezialpapiere Gmbh Aufzeichnungsmaterial
DE112009003792B4 (de) * 2008-12-26 2020-10-15 Mitsubishi Paper Mills Limited Thermisches Aufzeichnungsmaterial und Verfahren zu dessen Herstellung
WO2019229179A1 (fr) * 2018-05-30 2019-12-05 Mitsubishi Hitec Paper Europe Gmbh Matériau d'enregistrement thermosensible comportant une face arrière brillante et imprimable et procédé de production d'un matériau d'enregistrement thermosensible

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ATE423682T1 (de) 2009-03-15
EP1543984B1 (fr) 2009-02-25
ES2321399T3 (es) 2009-06-05
EP1543984A3 (fr) 2006-02-08

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