EP0992363B1 - Matériau d'enregistrement sensible à la chaleur - Google Patents

Matériau d'enregistrement sensible à la chaleur Download PDF

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Publication number
EP0992363B1
EP0992363B1 EP19990307836 EP99307836A EP0992363B1 EP 0992363 B1 EP0992363 B1 EP 0992363B1 EP 19990307836 EP19990307836 EP 19990307836 EP 99307836 A EP99307836 A EP 99307836A EP 0992363 B1 EP0992363 B1 EP 0992363B1
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EP
European Patent Office
Prior art keywords
heat
sensitive recording
recording layer
ultraviolet ray
ray absorbing
Prior art date
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Revoked
Application number
EP19990307836
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German (de)
English (en)
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EP0992363A1 (fr
Inventor
Masayuki Iwasaki
Hirofumi Mitsuo
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Fujifilm Corp
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Fuji Photo Film Co Ltd
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Application filed by Fuji Photo Film Co Ltd filed Critical Fuji Photo Film Co Ltd
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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
    • B41M5/46—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 characterised by the light-to-heat converting means; characterised by the heat or radiation filtering or absorbing means or 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
    • B41M5/30—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
    • B41M5/3375—Non-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
    • B41M5/40—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

Definitions

  • the present invention relates to a heat-sensitive recording material. More particularly, the present invention relates to an improvement of a heat-sensitive recording material comprising a support having formed thereon at least one of heat-sensitive recording layer comprising an electron donative colorless dye, an electron acceptive compound and an ultraviolet ray absorbing compound and is defined by present claim 1.
  • Recording materials using electron donative colorless dyes and electron acceptive compounds as color developing components are well known in the form of pressure-sensitive paper, heat-sensitive paper, photosensitive pressure-sensitive paper, conductive heat-sensitive recording paper, and heat-sensitive transfer paper. Examples of such recording materials are described in detail, for example, in GB Patent No. 2,140,449, US Patent Nos. 4,480,052 and 4,436,920, Japanese Patent Application Publication (JP-B) No. 60-23992, Japanese Patent Application Laid-Open (JP-A) Nos. 57-179836, 60-123556, and 60-123557.
  • heat-sensitive recording for example, heat-sensitive recording materials using electron donating dye precursors and electron acceptive compounds are disclosed in JP-B Nos. 45-14039 and 43-4160.
  • heat-sensitive recording systems have been applied in many areas such as facsimiles, printers, labels, meter readers' terminals, medical image output terminals, and prepaid cards, and thus needs therefor are increasing.
  • improvement of color developing sensitivity is highly desired and various techniques have been proposed.
  • heat-sensitive materials of this kind using heat-sensitive recording layers using electron donating dye precursors and electron acceptive compounds, there are problems in light fastness of image portions and background portions thereof, i.e., when the heat-sensitive materials are exposed to fluorescent light, sunlight or the like for a long period of time, lowered density of image portions and discoloring of background portions tend to occur.
  • JP-A-8/230331 cited in the European Search Report discloses a red and black heat-sensitive recording material comprising a support having sequentially disposed thereon a high-temperature coloring layer that colors to black and a low-temperature coloring layer that colors to red.
  • the high-temperature coloring layer and the low-temperature coloring layer each include an electron-receptive development compound and an electron-donative coloring dye suitable to produce the black or red color, respectively (i.e. a different dye is present in each layer).
  • the low-temperature coloring layer, or a protective layer disposed on it further includes a fluorescent whitening agent and microcapsules containing therein an ultraviolet absorbent.
  • An object of the present invention is to provide a heat-sensitive recording material which overcomes the above-mentioned problems and has improved light fastness of background portions thereof without decreasing color developing density thereof.
  • the present invention provides a heat-sensitive recording material comprising a support having formed thereon one or more heat-sensitive recording layers, wherein at least one of the one or more heat-sensitive recording layers comprise an electron donative colorless dye, an electron acceptive compound and an ultraviolet ray absorbing agent, and when there is a plurality of heat-sensitive recording layers, each layer comprises the same electron donative colorless dye and electron acceptive compound as each of the other layers, and distribution of the ultraviolet ray absorbing agent is such that the amount of the ultraviolet ray absorbing agent increases in a thickness direction away from the support.
  • a heat-sensitive recording material in accordance with the present invention is based on a support on which is formed one or more heat-sensitive recording layers comprising an electron donative colorless dye, an electron acceptive compound and an ultraviolet ray absorbing material and when there is a plurality of heat-sensitive recording layers, each layer comprises the same electron donative colourless dye and electron accepting compound as each of the other layers.
  • Distribution of the ultraviolet ray absorbing agent in the heat-sensitive recording layer or layers is such that the amount of the agent increases in a direction away from the support.
  • the form of the above distribution in the direction of the film thickness of the heat-sensitive recording layer or layers may be such that the amount of the ultraviolet ray absorbing agent increases sequentially in a direction away from the support, or the ultraviolet ray absorbing agent may be contained only in the heat-sensitive recording layer, of a plurality of laminated heat-sensitive recording layers, which heat-sensitive layer is furthest from the support.
  • such forms of distribution are possible in which a plurality of heat-sensitive recording layers are formed on the support and, of these heat-sensitive recording layers, the layer furthest from the support contains the highest amount of the ultraviolet ray absorbing agent and amounts of the agent contained in the layers sequentially decrease in a film thickness direction toward the support, or in which a plurality of heat-sensitive recording layers are formed on the support and the ultraviolet ray absorbing agent is contained only in the layer among these layers furthest from the support and the remaining layers do not contain the ultraviolet ray absorbing agent.
  • a heat-sensitive recording material comprising a first heat-sensitive recording layer and a second heat-sensitive recording layer laminated on the first layer is desirable for practical use.
  • the second heat-sensitive recording layer in view of minimizing the influence of light on the heat-sensitive recording layer, it is desirable to have the second heat-sensitive recording layer contain a desired amount of the ultraviolet ray absorbing agent.
  • the ultraviolet ray absorbing agent including a higher amount of the ultraviolet ray absorbing agent is preferred in view of preventing fogging of the heat-sensitive recording material.
  • the amount of the ultraviolet ray absorbing agent contained in the second heat-sensitive recording layer is desirably not more than 50% by weight based on the total weight of the solid components. Therefore, considering coating stability of the heat-sensitive recording layer coating solution, fogging prevention of the heat-sensitive recording material and the like, the amount of the ultraviolet ray absorbing agent contained in the second heat-sensitive recording layer is desirably, for example, 20-50% by weight based on the total weight of the solid components, and the amount of the agent contained in the first heat-sensitive recording layer is desirably 0-30% by weight based on the total weight of the solid components.
  • the amount of the ultraviolet ray absorbing agent contained in the second heat-sensitive recording layer is less than 20% by weight, the amount of the agent added to the second heat-sensitive recording layer is small and the amount of the ultraviolet ray absorbing agent contained in the first heat-sensitive recording layer is relatively large, so that a blocking effect of the ultraviolet ray absorbing agent contained in the second layer is lowered and undesirable fogging tends to occur on the heat-sensitive recording material.
  • the amount of the ultraviolet ray absorbing agent contained in the second heat-sensitive recording layer is increased to over 50% by weight based on the total weight of the solid components, the amount of the agent added to the second heat-sensitive recording layer is large and the amount of the agent contained in the first heat-sensitive recording layer can be decreased; however, coating stability of the second heat-sensitive recording layer coating solution tends to be lowered.
  • any of known ultraviolet ray absorbing agents such as a benzophenone-based ultraviolet ray absorbing agent, a benzotriazole-based ultraviolet ray absorbing agent, a salicylic acid-based ultraviolet ray absorbing agent, a cyanoacrylate -based ultraviolet ray absorbing agent, an oxalic acid anilide-based ultraviolet ray absorbing agent or the like can be used, and the benzotriazole-based compound is particularly suitable.
  • a conventional known benzotriazole-based compound can be used.
  • Benzotriazole-based compounds include, for example, 2-(2'-hydroxy-5'-methylphenyl) benzotriazole, 2-(2'-hydroxy-3'-t-butyl-5'-methylphenyl) benzotriazole, 2-(2'-hydroxy-5'-t-octylphenyl) benzotriazole, 2-(2'-hydroxy-3', 5'-di-t-aminophenyl) benzotriazole, 2-(2'-hydroxy-3', 5-di-t-butylphenyl) benzotriazole, 2-(2'-hydroxy-3'-t-butyl-5'-methylphenyl)-5-chlorobenzotriazole, 2-(2'-hydroxy-3', 5'-di-t-butylphenyl)-5-chlorobenzotriazole, 2-(2'-hydroxy-3', 5-diphenylphenyl) benzotriazole, 2-(2'-hydroxy-3'-t-butyl-5'
  • water soluble resin can be used as a binder for the heat-sensitive recording layer.
  • Polyvinyl alcohol or modified polyvinyl alcohol is preferable as the water soluble resin. It is preferable that the ultraviolet ray absorbing agent and the polyvinyl alcohol or the modified polyvinyl alcohol are contained in the second heat-sensitive recording layer.
  • the polyvinyl alcohol or the modified polyvinyl alcohol is desirable as the binder to form the heat-sensitive recording layer in view of coating stability of the heat-sensitive recording layer coating solution.
  • polyvinyl alcohol polyvinyl alcohol having a degree of polymerization from 700 to 3000 is desirable.
  • modified polyvinyl alcohols in the present invention include carboxy modified polyvinyl alcohol, silicon modified polyvinyl alcohol, acetoacetyl group modified polyvinyl alcohol, ethylene modified polyvinyl alcohol, polyvinyl alcohol- polyacrylic acid block polymer and the like.
  • the percentage content of the polyvinyl alcohol or the modified polyvinyl alcohol in the second heat-sensitive recording layer is desirably not less than 40% by weight based on the total weight of the solid components. If the percentage content of the polyvinyl alcohol or the modified polyvinyl alcohol in the second heat-sensitive recording layer is less than 40% by weight, coating strength of the second heat-sensitive recording layer is decreased and chemical resistance, plasticizer resistance and water resistance (waterproof) of the heat-sensitive recording material are impaired; therefore it is not preferable.
  • the first heat-sensitive recording layer contains a water-proofing agent which reacts with the polyvinyl alcohol contained in the second heat-sensitive recording layer.
  • the heat-sensitive recording layer of the present invention comprises an electron donative colorless dye and an electron acceptive compound as heat-sensitive color developing components.
  • a heat-sensitive recording layer comprising the electron donative colorless dye and an acidic material as heat-sensitive color developing components, one of the components melts with heating and then both react with each other to develop a color.
  • a third meltable component (generally a low-melting-point organic material) may also be added to the heat-sensitive recording layer as required.
  • Examples of the electron donative colorless dye include a triarylmethane-based compound, a diphenylmethane-based compound, a thiazine-based compound, a xanthene-based compound, a spiropyrane-based compound and the like, and a triarylmethane-based compound and a xanthene-based compound are especially useful due to their high color developing density.
  • a portion thereof may be exemplified by 3,3-bis(p-dimethylaminophenyl)-6-dimethylaminophthalide (namely, crystal violet lactone), 3,3-bis(p-dimethylamino)phthalide, 3-(p-dimethylaminophenyl)-3-(1,3-dimethylindole-3-yl)phthalide, 3-(p-dimethylaminophenyl)-3-(2-methylindole-3-yl)phthalide, 3-(o-methyl-p-dimethylaminophenyl)-3-(2-methylindole-3-yl)phthalide, 4,4'-bis(dimethylamino)benzhydrinbenzyl ether, N-halophenylleucoauramine, N-2,4,5-trichlorophenylleucoauramine, rhodamine-B-anilinolactam, rhodamine(p-nitroanilino)lactam
  • Examples of the electron acceptive compound include a phenol derivative, a salicylic acid derivative, hydroxybenzoate, and the like. Bisphenols and hydroxybenzoates are particularly preferred.
  • a portion thereof may be exemplified by 2,4'-dihydroxydiphenylsulfone, 2,2'-dihydroxydiphenylsulfone, 2,2-bis(p-hydroxyphenyl)propane (namely, bisphenol A), 2,2-bis(p-hydroxyphenyl)pentane, 2,2-bis(p-hydroxyphenyl)ethane, 2,2-bis(p-hydroxyphenyl)butane, 2,2-bis(4'-hydroxy-3',5'-dichlorophenyl)propane, 1,1-(p-hydroxyphenyl)cyclohexane, 1,1-(p-hydroxyphenyl)propane, 1,1-(p-hydroxyphenyl)pentane, 1,1-(p-hydroxyphenyl)-2-ethylhexane, 3,5-di( ⁇ -methylbenzyl)salicylic acid and polyvalent metal salts thereof, 3,5-di( ⁇ -methylbenzyl)salicylic acid and
  • the low-melting-point organic compounds are called sensitizers because color developing reactions start at lower temperatures with addition of these low-melting-point organic compounds.
  • a low-melting-point organic compound containing an appropriate amount of an aromatic group and a polar group in the molecule is preferred, and examples thereof include benzyl p-benzyloxybenzoate, ⁇ -naphthylbenzyl ether, ⁇ -naphthylbenzyl ether, phenyl ⁇ -naphtoate, phenyl ⁇ -hydroxy- ⁇ -naphtoate, ⁇ -naphtol-(p-chlorobenzyl)ether, 1,4-butane diol phenyl ether, 1,4- butane diol-p-methylphenyl ether, 1,4-butane diol-p-ethylphenyl ether, 1,4-butane diol-m-methylphenylether, 1-
  • An antioxidant, a metallic soap or a wax and the like may be added into the heat-sensitive recording layers as required.
  • the antioxidant include a hindered amine light stabilizer, a hindered phenol-based antioxidant, an aniline-based antioxidant, a quinoline-based antioxidant and the like, and a hindered amine light stabilizer such as 1,1,3-tris-(2-methyl-4-hydroxy-5-t-butylphenyl)butane is especially suitable.
  • the metallic soap include a polyvalent metal salt of higher fatty acid such as zinc stearate, aluminum stearate, and calcium stearate, and the like.
  • the wax include paraffin wax, carnauba wax, microcrystalline wax, polyethylene bisstearoamide, higher fatty acid ester, and the like.
  • the first and the second heat-sensitive recording layers can be applied simultaneously using methods such as those described in specifications of US Patent Nos. 2,761,791, 3,508,947, 2,941,898, and 3,526,528, in Yuji HARASAKI, "Coating Technology", page 253 (Asakura Shoten, 1973) and the like.
  • the coating amount of the first heat-sensitive recording layer is 1-10 g/m 2 , preferably 2-7 g/m 2 in dry weight
  • the coating amount of the second heat-sensitive recording layer is 0.5-7 g/m 2 , preferably 1-5 g/m 2 in dry weight.
  • a protective layer may be provided on the heat-sensitive recording layer of the present invention as required.
  • the protective layer can comprise organic or inorganic powder, a binder, a surfactant, a thermally fusible material, and the like.
  • the powder include inorganic powder such as calcium carbonate, silica, zinc oxide, titanium oxide, aluminum hydroxide, zinc hydroxide, barium sulfate, clay, talc, surface-treated calcium and silica and the like, and organic powder such as urea-formalin resin, stylen/methacrylic acid copolymer, polystyrene, and the like; however, an inorganic pigment is particularly preferable.
  • polyvinyl alcohol As a binder in the protective layer, polyvinyl alcohol, carboxy modified polyvinyl alcohol, vinyl acetate- acrylic amide copolymer, silicon modified polyvinyl alcohol, starch, modified starch, methylcellulose, carboxymethylcellulose, hydroxymethylcellulose, gelatins, gum arabic, casein, styrene-maleic anhydride copolymer hydrolyzate, a polyacrylic amide derivative, polyvinyl pyrolidone, and latex such as styrene-butadiene gum latex, acrylonitrile-butadiene gum latex, methyl acrylate-butadiene gum latex, vinyl acetate emulsion, and the like can be used.
  • a waterproofing agent can be added thereto to further improve storage stability of the heat-sensitive recording material by cross-linking the binder components in the protective layer.
  • the water-resistence agent include water soluble primary condensates such as N-methylolurea, N-methylolmelamine and urea-formalin, dialdehyde compounds such as glyoxal and glutaraldehyde, inorganic crosslinking agents such as boric acid, borax and colloidal silica, and polyamide epichlorohydrine.
  • colloidal silica, glyoxal or the like may be added into the first heat-sensitive recording layer and the polyvinyl alcohol or the like in the second heat-sensitive recording layer may be crosslinked, to form a film with high water resistance at the interface between the first and the second heat-sensitive recording layers.
  • the support in the present invention a conventional known support can be used.
  • the support include woodfree paper, neutral-paper, acidic paper, regenerated paper, coated paper, polyolefine resin laminated paper, synthetic paper, polyester film, cellulose derivative film such as cellulose triacetate film and the like, polystyrene film, polyolefine film such as polypropylene film and polyethylene film, and the like.
  • kaolin (Kaobright manufactured by Shiraishi Kogyo) 10 parts sodium hexametaphosphate 0.1 parts water 20 parts These were mixed for three minutes by a homogenizer to obtain Solution E. 10% polyninyl alcohol aqueous solution 100 parts Solution E 30 parts These were mixed and stirred to obtain a coating solution for the protective layer.
  • the obtained coating solution for the first heat-sensitive recording layer was coated onto a woodfree paper having a basic weight of 50 g/m 2 in a dry coating-amount of 5 g/m 2 by a hand-coating bar, and then was dried in an oven and subjected to a calender treatment.
  • the first heat-sensitive recording layer was provided with coating.
  • the obtained coating solution for the second heat-sensitive recording layer was coated onto the first heat-sensitive recording layer in a dry coating amount of 3 g/m 2 by a hand-coating bar, and then was dried in an oven and subjected to a calender treatment.
  • the second heat-sensitive recording layer was provided by coating.
  • the obtained coating solution for the nrotective laver was coated onto the second heat-sensitive recording layer in a dry coating amount of 2 g/m 2 by a hand-coating bar, and then was dried in an oven and subjected to a calender treatment. Thus, a heat-sensitive recording paper was obtained.
  • a heat-sensitive recording paper was obtained in the same way as Example 1, except that the polyvinyl alcohol (PVA 117, having polymerization degree of 1700) in the solution D was substituted to silicon modified polyvinyl alcohol (R-1130 manufactured by Kuraray Co., Ltd., polymerization degree 1700).
  • a heat-sensitive recording paper was obtained in the same way as Example 1, except that the amount of the 10% polyvinyl alcohol aqueous solution used in the coating solution for the second heat-sensitive recording layer was reduced to 100 parts.
  • a heat-sensitive recording paper was obtained in the same way as Example 2, except that 10 parts of colloidal silica (Snowtex O manufactured by Nissan Chemical Kogyo Co., Ltd.) was added to the coating solution of the first heat-sensitive recording layer.
  • colloidal silica Snowtex O manufactured by Nissan Chemical Kogyo Co., Ltd.
  • a heat-sensitive recording paper was obtained in the same way as Example 1, except that the polyvinyl alcohol used in the coating solution for the second heat-sensitive recording layer was substituted with PVA 105 (manufactured by Kuraray Co., Ltd., having a polymerization degree of 550).
  • a heat-sensitive recording paper was obtained in the same way as Example 1, except that the polyvinyl alcohol used in the coating solution for the second heat-sensitive recording layer was substituted with PVA 135 H (manufactured by Kuraray Co., Ltd., having a polymerization degree of 3500).
  • a heat-sensitive recording paper was obtained in the same way as Example 1, except that the solution D was not added to the coating solution for the second heat-sensitive recording layer.
  • a heat-sensitive recording paper was obtained in the same way as Example 1, except that the mixture of the coating solutions for the first and the second heat-sensitive recording layers were coated on a woodfree paper in a dry coating amount of 8 g/m 2 by a hand-coating bar, and then dried in an oven.
  • a heat-sensitive recording paper was obtained in the same way as Example 4, except that colloidal silica was added to the second heat-sensitive recording layer, not to the first heat-sensitive recording layer.
  • Brightness of 10-sheet-ply of each of the resulting heat-sensitive recording papers was measured by a Hunter brightness meter (manufactured by Kumagai Riki-Kogyo) using a blue filter. Brightness of not less than 80% is preferable for practical use.
  • a light fastness test was performed on the resulting heat-sensitive recording papers for five hours using Weather meter (Ci65A manufactured by Toyo Seiki), and the density of background portions of each example was measured by a Macbeth reflection densitometer RD 918. Background density of not more than 0.10 is preferable for practical use.
  • Examples 1-7 having an ultraviolet ray absorbing agent added into the second heat-sensitive recording layer thereof with no ultraviolet ray absorbing agent added into the first heat-sensitive recording layer thereof, have shown a light fastness of 0.08, which is a preferable value for practical use, and a recording density of almost the same value with those of the Comparative Examples 1 and 2.
  • Example 5 the polymerization degree of the polyvinyl alcohol used in the second heat-sensitive recording layer thereof being 550, had particularly low chemical resistance.
  • Example 6 the polymerization degree of the polyvinyl alcohol used in the second heat-sensitive recording layer thereof being 3500, had low brightness.
  • the polymerization degree of the polyvinyl alcohol used in the second heat-sensitive recording layer is preferably between about 700-3000.

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

Claims (15)

  1. Matériau d'enregistrement sensible à la chaleur comprenant un support sur lequel sont formées une ou plusieurs couches d'enregistrement sensibles à la chaleur, dans lequel
       au moins la seule ou une des plusieurs couches d'enregistrement sensibles à la chaleur comprennent un colorant donneur d'électrons à l'état incolore, un composé accepteur d'électrons et un composé absorbant le rayonnement ultraviolet, et quand il y a une pluralité de couches d'enregistrement sensibles à la chaleur, chaque couche contient le même colorant donneur d'électrons à l'état incolore et le même composé accepteur d'électrons comme chacune des autres couches, et
       la répartition de l'agent absorbant le rayonnement ultraviolet est telle que la quantité d'agent absorbant le rayonnement ultraviolet augmente dans le sens de l'épaisseur en s'éloignant du support.
  2. Matériau d'enregistrement sensible à la chaleur selon la revendication 1, comprenant en plus une couche protectrice sur une ou plusieurs des couches d'enregistrement sensibles à la chaleur.
  3. Matériau d'enregistrement sensible à la chaleur selon la revendication 1 ou la revendication 2, caractérisé en ce qu'une ou plusieurs des couches d'enregistrement sensibles à la chaleur sont une pluralité de couches d'enregistrement sensibles à la chaleur laminées, et, parmi ces couches, seulement la couche d'enregistrement sensible à la chaleur la plus éloignée du support contient l'agent absorbant le rayonnement ultraviolet.
  4. Matériau d'enregistrement sensible à la chaleur selon la revendication 1 ou la revendication 2, caractérisé en ce que une ou plusieurs des couches d'enregistrement sensibles à la chaleur sont une pluralité de couches d'enregistrement sensibles à la chaleur laminées, et, parmi ces couches, la couche d'enregistrement sensible à la chaleur la plus éloignée du support contient la quantité la plus élevée d'agent absorbant le rayonnement ultraviolet et les quantités d'agent absorbant le rayonnement ultraviolet contenu dans les couches diminuent de façon séquentielle dans l'épaisseur du film en allant en direction du support.
  5. Matériau d'enregistrement sensible à la chaleur, selon l'une quelconque des revendications 1 à 4, caractérisé en ce qu'une ou plusieurs des couches d'enregistrement sensibles à la chaleur sont une première couche d'enregistrement sensible à la chaleur et une seconde couche d'enregistrement sensible à la chaleur laminée sur la première couche d'enregistrement sensible à la chaleur et la seconde couche d'enregistrement sensible à la chaleur comprend l'agent absorbant le rayonnement ultraviolet et un alcool polyvinylique ou un alcool polyvinylique modifié.
  6. Matériau d'enregistrement sensible à la chaleur selon la revendication 5, caractérisé en ce que l'alcool polyvinylique est contenu en une quantité qui est de 40 % ou plus par rapport au poids des composants solides de la seconde couche d'enregistrement sensible à la chaleur.
  7. Matériau d'enregistrement sensible à la chaleur selon la revendication 5 ou la revendication 6, caractérisé en ce que la première couche d'enregistrement sensible à la chaleur contient un agent d'imperméabilisation qui réagit avec l'alcool polyvinylique contenu dans la seconde couche d'enregistrement sensible à la chaleur.
  8. Matériau d'enregistrement sensible à la chaleur, selon l'une quelconque des revendications 5 à 7, caractérisé en ce que la quantité d'agent absorbant le rayonnement ultraviolet contenu dans la seconde couche d'enregistrement sensible à la chaleur est 50 % en poids ou moins par rapport au poids total de composés solides.
  9. Matériau d'enregistrement sensible à la chaleur, selon l'une quelconque des revendications 5 à 8 caractérisé en ce que la quantité d'agent absorbant le rayonnement ultraviolet contenu dans la seconde couche d'enregistrement sensible à la chaleur est 20-50 % en poids par rapport au poids total de composés solides.
  10. Matériau d'enregistrement sensible à la chaleur selon l'une quelconque des revendications 5 à 9, caractérisé en ce que la première couche d'enregistrement sensible à la chaleur contient l'agent absorbant le rayonnement ultraviolet est en une quantité de 0 à 30 % en poids par rapport au poids total de composés solides.
  11. Matériau d'enregistrement sensible à la chaleur selon l'une quelconque des revendications 1 à 10, caractérisé en ce que l'agent absorbant le rayonnement ultraviolet est un agent absorbant le rayonnement ultraviolet à base de benzatriazole.
  12. Matériau d'enregistrement sensible à la chaleur selon l'une quelconque des revendications 5 à 11, caractérisé en ce que l'alcool polyvinylique a un degré de polymérisation de 700 à 3000.
  13. Matériau d'enregistrement sensible à la chaleur selon l'une quelconque des revendications 1 à 12, caractérisé en ce qu'au moins une ou plusieurs des couches d'enregistrement sensibles à la chaleur contiennent, en plus, au moins un composé choisi parmi un antioxydant, un savon métallique et une cire.
  14. Matériau d'enregistrement sensible à la chaleur selon l'une quelconque des revendications 5 à 13, caractérisé en ce que la quantité de revêtement de la première couche d'enregistrement sensible à la chaleur est 1-10 g/m2, en poids à l'état sec et une quantité de revêtement de la seconde couche d'enregistrement sensible à la chaleur est 0,5-7 g/m2, en poids à l'état sec.
  15. Matériau d'enregistrement sensible à la chaleur selon l'une quelconque des revendications 5 à 14, caractérisé en ce que la quantité de revêtement de la première couche d'enregistrement sensible à la chaleur est 2-7 g/m2, en poids à l'état sec et une quantité de revêtement de la seconde couche d'enregistrement sensible à la chaleur est 1-5 g/m2, en poids à l'état sec.
EP19990307836 1998-10-09 1999-10-05 Matériau d'enregistrement sensible à la chaleur Revoked EP0992363B1 (fr)

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Application Number Priority Date Filing Date Title
JP28757398A JP4156724B2 (ja) 1998-10-09 1998-10-09 感熱記録材料
JP28757398 1998-10-09

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EP0992363A1 EP0992363A1 (fr) 2000-04-12
EP0992363B1 true EP0992363B1 (fr) 2004-09-22

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Publication number Priority date Publication date Assignee Title
CN1248867C (zh) 2001-06-01 2006-04-05 富士胶片株式会社 感热记录材料
US7094731B2 (en) 2001-06-26 2006-08-22 Fuji Photo Film Co., Ltd. Recording material
KR20040012662A (ko) 2001-06-28 2004-02-11 후지 샤신 필름 가부시기가이샤 감열기록재료
KR20040065301A (ko) * 2001-12-20 2004-07-21 후지 샤신 필름 가부시기가이샤 감열기록재료
EP1466752A4 (fr) * 2001-12-20 2005-03-30 Fuji Photo Film Co Ltd Materiau d'enregistrement thermosensible
CN1606507A (zh) * 2001-12-20 2005-04-13 富士胶片株式会社 热敏记录材料
WO2003053711A1 (fr) * 2001-12-20 2003-07-03 Fuji Photo Film Co., Ltd. Materiau de thermographie
JP2012076300A (ja) * 2010-09-30 2012-04-19 Nippon Paper Industries Co Ltd 感熱記録材料
JP7634941B2 (ja) * 2019-02-28 2025-02-25 キヤノン株式会社 感熱記録体及び画像形成方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4663642A (en) * 1985-02-23 1987-05-05 Ricoh Company, Ltd. Thermosensitive recording material
EP0630758B1 (fr) * 1993-06-21 1998-10-07 Mitsubishi Paper Mills, Ltd. Matériau d'enregistrement sensible à la chaleur
JPH08230331A (ja) * 1995-02-24 1996-09-10 New Oji Paper Co Ltd 赤黒２色感熱記録材料

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DE69920361T2 (de) 2005-02-17
JP4156724B2 (ja) 2008-09-24
ES2230809T3 (es) 2005-05-01
EP0992363A1 (fr) 2000-04-12
JP2000108519A (ja) 2000-04-18
DE69920361D1 (de) 2004-10-28

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