WO2009041744A1 - 感熱記録材料及びその製造方法 - Google Patents
感熱記録材料及びその製造方法 Download PDFInfo
- Publication number
- WO2009041744A1 WO2009041744A1 PCT/JP2008/068121 JP2008068121W WO2009041744A1 WO 2009041744 A1 WO2009041744 A1 WO 2009041744A1 JP 2008068121 W JP2008068121 W JP 2008068121W WO 2009041744 A1 WO2009041744 A1 WO 2009041744A1
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- WIPO (PCT)
- Prior art keywords
- heat
- sensitive recording
- recording material
- protective layer
- coating liquid
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
- B41M5/42—Intermediate, backcoat, or covering layers
- B41M5/44—Intermediate, backcoat, or covering layers characterised by the macromolecular compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M2205/00—Printing methods or features related to printing methods; Location or type of the layers
- B41M2205/04—Direct thermal recording [DTR]
Definitions
- the present invention relates to a heat-sensitive recording material in which a heat-sensitive color developed by heat and a protective layer thereof are provided in this order on a support, and a method for producing the same.
- the protective layer has excellent water resistance and is stable. It relates to a heat-sensitive recording material that can be produced and a method for producing the same. Background technique
- a heat-sensitive recording material generally has a heat-sensitive recording layer that develops color by heat on a support. By heating with a heat head, a heat pen, laser light, etc., a dye precursor is obtained. The electron donating compound and the electron accepting compound as the developer react instantaneously to obtain a recorded image.
- Such heat-sensitive recording materials have the advantages of being able to record with a relatively simple device, being easy to maintain, and generating no noise. Used in a wide range of fields such as mills, printers, computer terminals, label printing machines, ticket issuing machines, etc.
- An object of the present invention is to provide a heat-sensitive recording material excellent in water resistance of a protective layer and capable of stable production, and a method for producing the same.
- the present inventors have come up with a heat-sensitive recording material that can achieve the above-mentioned purpose and a method for producing the heat-sensitive recording material. That is,
- the heat-sensitive recording material of the present invention is a heat-sensitive recording material in which a heat-sensitive recording layer that develops color by heat and a protective layer are provided in this order on a support, and the protective layer is a polyhydric alcohol, O Protective layer characterized in that it is obtained by coating and drying on the thermosensitive recording layer in the form of an aqueous coating solution containing a cross-linking agent, pigment, carboxylic acid and volatile acid.
- a cross-linking agent containing a cross-linking agent, pigment, carboxylic acid and volatile acid.
- the stability of the coating liquid can be further enhanced by setting the ⁇ of the WI water-based coating liquid to 8 or more.
- allelic acid, volatile amide, and cross-linking agent are added in this order, and the PH after the addition of aralexic acid is less than 6.
- the water resistance rate of the protective layer can be increased, and the water resistance and stability of the water-based coating liquid can be further enhanced.
- water resistance can be further enhanced by using polyvalent alcohol alcohol as a m-modified polyvinyl alcohol.
- the degree of polymerization of BU-diacetate-modified polyvinyl alcohol is set to 50 0 or more and less than 4,00 0, and the hatching degree is further 80% or more 9 8 % ⁇ 3 ⁇ 4 further enhances the stability of the water-based coating liquid: it is possible to obtain excellent barrier properties.
- undercoat layer there is at least one undercoat layer between the heat-sensitive recording layer and the support, and the undercoat layer contains organic hollow particles, so that it can be used for a protective layer.
- the undercoat layer contains organic hollow particles, so that it can be used for a protective layer.
- thermosensitive recording layer is usually not colorless or lightly dyed.
- the dye precursor is added to a dibutylamino 6-methyl-7-anilinophenololane and 3-(( ⁇ -ethyl-1-N-soamyl) amino- 6—Methyl 7-anilinophenololan and 3—Dipentinoleamino — 6—Methyl-7-anilinophenololane and 3— (N—Ethinole 4-Methylphenyl) No 6-methyl-7-anilinofluorane and 3 monoethyla, no 6-methyl-7- (3-methylphenenolemino)
- the hydrophobicity of the dye precursor suppresses the penetration of moisture into the thermal recording layer during the coating and drying process of the water-based coating liquid for the protective layer, thereby reducing the moisture in the protective layer. By maintaining it, a more uniform cross-linked film can be formed, Can further enhance water resistance
- the flat structure of the force oil can be applied to the protective layer water-based coating liquid and dried. Suppressing the penetration of moisture into the heat-sensitive recording layer during the drying process and maintaining the moisture content in the protective layer can form a more uniform crosslinked film, further enhancing water resistance Can be improved, and the improvement of the kneading property and sticking property can be obtained.
- the surface of the heat-sensitive recording material can be easily made acidic, the water-resistance rate can be further increased, and even better water resistance can be obtained. it can.
- a knock coat layer is provided on the surface of the support opposite to the side on which the thermosensitive recording layer is provided.
- thermosensitive recording layer is provided on the surface of the support opposite to the side on which the thermosensitive recording layer is provided.
- release paper is provided on the surface of the support opposite to the side on which the heat-sensitive recording layer is provided.
- thermosensitive recording layer is provided on the surface of the support opposite to the side on which the thermosensitive recording layer is provided.
- the present invention relates to a method for producing a heat-sensitive recording material in which a heat-sensitive recording layer that develops color by heat on a support and a protective layer thereof are provided in this order. , Crosslinking agent, Water-based coating solution containing a lubricant, valeric acid, and volatile amine, and at least adding allelic acid, volatile amine, and cross-linking agent in this order.
- the present invention relates to a method for producing a heat-sensitive recording material, characterized in that it is coated on the heat-sensitive recording layer and dried.
- the aqueous coating solution has a pH of less than 6 after the addition of aradic acid, and a pH of 7 after the addition of the volatile amine. That's it.
- the water-based coating liquid is applied onto the heat-sensitive recording layer using an airfoil.
- the heat-sensitive recording material of the present invention has a heat-sensitive recording layer that develops color by heat on a support, and at least one protective layer on the heat-sensitive recording layer.
- the protective layer constituting the heat-sensitive recording material of the present invention contains at least a polyalcohol, a cross-linking agent, a pigment, and valenic acid, and the alenic acid and volatile amine are contained. It is formed by coating and drying on the heat-sensitive recording layer in the state of an aqueous coating solution containing it.
- the Kiric acid used in the present invention refers to a substance that releases protein in the presence of moisture. Specifically, hydroxy acids such as lactic acid, citrate, lingoic acid and tartaric acid, alkanoic acids such as formic acid, acetic acid, propionic acid, butyric acid, valeric acid, cabronic acid, etc. Dibasic acids such as oxalic acid, malic acid, succinic acid, daltaric acid, adipic acid, maleic acid, fumaric acid, benzoic acid benzoic acid, salicylic acid, etc.
- hydroxy acids such as lactic acid, citrate, lingoic acid and tartaric acid
- alkanoic acids such as formic acid, acetic acid, propionic acid, butyric acid, valeric acid, cabronic acid, etc.
- Dibasic acids such as oxalic acid, malic acid, succinic acid, daltaric acid, adipic acid, maleic acid, fum
- Inorganic acids such as phosphoric acid, sulfuric acid, sulfurous acid, nitric acid, perchloric acid, hypochlorous acid, hydrochloric acid, etc. These may be mixed and used.
- benzoic acid By reducing the surface area of the protective layer using benzoic acid, the nucleophilic cross-linking reaction between the polyvinyl alcohol and the cross-linking agent can be activated. As a result, the water resistance speed can be increased and the water resistance can be improved.
- the arajuic acid used is not particularly limited in the present invention, but it is volatile and can be used to decompose the polyvinyl alcohol. Droxy acids are preferred.
- the water resistance rate means the time from when the water-based coating liquid for the protective layer is applied to the heat-sensitive recording layer and after drying until the resulting heat-sensitive recording material exhibits water resistance.
- a short time required for water resistance is defined as a fast or good water resistance rate.
- the volatile amine used in the present invention refers to an amine in a gaseous state at 60 ° C. and 1 atm. Specifically, ammonia, primary alkyl substituted with an anoalkyl group of carbon number: ⁇ 3
- Methylamine, Ethylamine, n-Plum Pylamine, Iso-Pop Plumamine, etc. can be used in combination.
- High water stability and coating pH can be suppressed, and reaction between polyvinyl alcohol in the coating liquid and the cross-linking agent can be suppressed.
- the stability of the water-based coating liquid for lips and protective layers is improved, and the water resistance can be improved over time after coating and drying.
- the molecular molecules are completely crosslinked and more uniformly crosslinked. improved but made form, the force s of improving the water resistance, between that you use the volatile ⁇ Mi down, made this a Gadesa, water resistance is found to modulate the cross-linking reaction J heart rate appropriate speed Is possible.
- the volatile amine to be used is not particularly limited in the present invention, but ammonia is preferred from the viewpoint of volatility and reactivity with alexamic acid. Those that are difficult to volatilize during the coating and drying process, or those that produce a stable reaction product by reaction with arajuic acid, suppress the effect of allelic acid even after drying. ⁇ Blocks the improvement of water resistance over time after drying.
- the protective layer-based aqueous coating liquid used in the present invention containing an carboxylic acid and a volatile amine, is obtained by adding or mixing the carboxylic acid and the volatile amine, respectively. It can be prepared by adding it, and it can also be prepared using a neutralized salt or an aqueous solution thereof.
- the neutralized salt used in the present invention refers to a compound obtained by mixing ⁇ with volatile amine and alcoholic acid. Specifically, ammonium chloride, cum, ammonium sulfate, hum, and shu These are ammonia, phosphoric acid ammonium, etc., and these may be mixed.
- an aqueous coating solution prepared using a neutralized salt exhibits the same effect as an aqueous coating solution prepared using arenic acid and volatile amine.
- the aqueous coating liquid prepared using the neutralized salt should be prepared using volatile amines and adjusted to PH.
- the nucleophilic cross-linking reaction between polyvinyl alcohol and the cross-linking agent is promoted in the acidic region.
- the acidity is set to an acid condition of less than 6, it is possible to effectively promote the cross-linking reaction after drying, and to further improve the water resistance over time.
- the surface pH of the protective layer is determined by the coating method of JTAPPI paper norp test method No. 6-75, and is the indicator solution for surface PH measurement. ), B. T '. B. (Promotimo-Norebu Nole--), B. C. P.
- the pH of the aqueous coating liquid for protective layer in the present invention is preferably 7 or more. Since the nucleophilic cross-linking reaction between polyvinyl alcohol and the cross-linking agent is accelerated in the acidic region, the pH of the aqueous coating solution should be 7 or higher. In this case, the cross-linking reaction during coating is suppressed, and a more stable aqueous coating liquid for protective layer can be obtained. When the repulsive force is less than S7, the crosslinking reaction proceeds in the coating liquid. When the pH is 8 or more, the stability of the coating liquid is further improved, so it is more preferable. In addition, water-based coating liquid for protective layer
- the water content of the preservative aqueous liquid in this specification is measured using the glass electrode method described in JISZ 1880.
- a Yokogawa model ⁇ 8 1 ⁇ 0- Sonal PH meter is used.
- aqueous coating liquid for shampoo ⁇ is mixed with polyvinyl alcohol, pigments, and other mother liquor, each of which contains araenic acid, volatile amine, and cross-linking agent.
- the pH was 6 after the addition of arajuic acid, and the pH after addition of the volatile amine was 7 or more. , Not only can the water resistance of the protective layer be further improved, but the stability of the coating solution can be further improved.
- Alfaic acid Volatile amine The order of addition of the cross-linking agent is other than that.
- aleic acid, cross-linking agent, volatile amino acid, or cross-linking agent In the order of oxalic acid, volatile acid, and acid, the cross-linking agent and polyvinyl alcohol are mixed in an acidic state, so that the cross-linking reaction proceeds rapidly and the mother liquor Z protection p Increase in viscosity Therefore, it is not preferable.
- volatile amine varenic acid cross-linking agent, or in the order of volatile amine, cross-linking agent, araenic acid, or cross-linking agent, volatile amine, valenic acid.
- the cross-linking agent and polyvinyl alcohol are not mixed in the acidic state, so the viscosity of the aqueous coating liquid for the mother liquor z protective layer does not increase and it is possible to keep the coating liquid stable.
- the pH of the mother liquor after the addition of arabinic acid is less than 6, preferably ⁇ 5, and the pH after addition of volatile amine is 7 or more, preferably ⁇ is 8 or more 9
- the stability of the water-based coating liquid for the protective layer and the water resistance of the protective layer are further improved.
- the acidity of the surface tends to be insufficient.
- the pH after addition of volatile amine is
- the cross-linking reaction between the polyvinyl alcohol and the cross-linking agent proceeds in the coating liquid, and the viscosity of the coating liquid may increase.
- the value is 8 or more and less than 9, it is more preferable because the stability of the coating liquid is further improved, and the cover on the heat-sensitive recording layer and the background fogging during the drying process are suppressed.
- the polyvinylo vinyl alcohol used in the protective layer is a non-modified polyvinyl vinyl alcohol, a force-ruboxy modified polyvinyl alcohol, or a silanol modified polymer.
- Libino Nino-reanolol, acetylacetyl-modified polyvinyl alcohol, diacetone-modified polyvinyl alcohol, and the like. These can be used alone or in combination. In particular, the use of diacetone modified polyvinyl alcohol further improves water resistance. It is possible to raise
- the degree of polymerization of ⁇ Hobininoreanoreconore is more than 500
- the molecular chain has a sufficient length, and the retention strength of the coating liquid component obtained by the entanglement of the molecular chains makes it possible to maintain the water content for the ⁇ layer. During the coating and drying process of the coating liquid, the penetration of the coating liquid into the thermal recording layer is suppressed, and a good film can be formed on the thermal recording layer.
- the holding force tends to be insufficient, and the heat-sensitive recording layer will permeate more frequently during the coating and drying process, making it difficult to form a good film.
- the degree of polymerization is less than 4,00 0, good solubility in water can be obtained, and the crosslinking reaction between the polyvinyl alcohol and the crosslinking agent can be achieved. Sudden thickening can be suppressed, and the stability of the coating solution can be further improved.
- the solubility in water is lowered, and a rapid if viscosity is caused by the bridge reaction, so that the stability of the coating liquid is lowered.
- the severity is from 1,00,000 to less than 2,000, a more excellent film can be formed on the thermosensitive recording layer, and the stability of the coating liquid is further improved. Therefore, it is more preferable.
- the ⁇ degree is
- the polyvinyl alcohol has a hatching degree of 80% or more 9
- the degree of hatching By reducing the degree of hatching to less than 98%, the crystallinity of the polyvinyl vinyl can be lowered, and the volume shrinkage of the coating that occurs during the drying of the aqueous coating liquid for the protective layer can be suppressed. It is possible to obtain a good barrier property by forming a highly homogeneous film with few microcracks due to shrinkage.
- the hatching degree is 98% or more In this case, the crystallinity becomes high, and the shrinkage of the film during the drying process becomes large, so that fine cracks are likely to be generated, and the NOR property is likely to be lowered.
- the degree of test is less than 80%, the solubility in water tends to decrease, and the stability of the coating solution decreases.
- the degree of experimentation is 90% or more and less than 98%, having better solubility in water further improves the stability of the coating liquid, and in the drying process. This is more preferable because the volume shrinkage of the coating is suppressed and good barrier properties can be obtained.
- the degree of experimentation can be measured by the test method specified in JISK 6 7 2 6.
- Methylol compounds such as vinyl resins and phenolic resins, compounds containing epoxyhydrin residues typified by polyamide chlorohydrin resins, polyfunctional epoxy resins, etc.
- examples include epoxy compounds, polyisocyanate compounds, isosorbate compounds such as block isocyanate compounds, persulfates, peroxides and other oxidizing agents. Or they can be used in combination.
- a hydrazide compound is particularly used as a cross-linking agent for the diacetone-modified polyvinyl alcohol.
- adipic acid dihydrazide isophthalic acid dihydrazide, terephthalanolic acid dihydrazide, dodecanedioic acid dihydrazide, oxalic acid dihydrazide Dihydride, malonic acid dihydrazide, cono, oxalic acid dihydrazide, glutanolic acid dihydrazide, seba Syndihydr hydride Maleic acid dihydride, Fumanoleic acid hydride, Didihydric acid dihydrazide, Hydrotalylic acid hydrazine
- hydrazide compounds such as hydrogen and the like, form a strong bond by a cross-linking reaction with the cross-linkable carbonyl group possessed by the HU dicene-modified poly vinylol.
- the hydrazide compound to be used is not particularly limited in the present invention, but adipic acid dihydrazide is more preferable from the viewpoint of JJ with diaceton-modified polyvinyl alcohol.
- Diaceton-modified polyvinyl alcohol and adipic acid dihydrazine K can reduce the air pressure by reducing the surface PH of the protective layer to less than 6 even after the protective layer is formed. The moisture in the water accelerates the cross-linking reaction, improves the water resistance with time, and does not cause discoloration due to the cross-linking reaction.
- the protective layer of the present invention as a pigment, caustic earth, talc, force, burning power, heavy carbonate, noble carbonate, light carbonate, magnesium carbonate, zinc oxide, Aluminum oxide, Al hydroxide, Ni, Magnesium hydroxide, Titanium dioxide, Sodium sulfate, Zinc sulfate, Non-oxide
- Inorganic pigments such as mussel shell, amorphous calcium silicate, cordial force, melamine resin, urine-honoreman resin, polyethylene, nylon, Organic pigments such as styrene-based plastic pigments, acrylic-based plastic pigments, and hydrocarbon-based plastic pigments can be used.
- force ion when force ion is used, the plate-like structure of force ion densely covers the heat-sensitive recording layer during the application of the aqueous coating liquid for the protective layer and the drying process, so that moisture can penetrate into the heat-sensitive recording layer The cross-linking reaction should be allowed to proceed slowly while keeping the water content in the protective layer long during the drying process. You can.
- the cross-linking reaction of the polyvinyl chloride progresses slowly, and the molecules are completely cross-linked to form a more uniform cross-linked film. improves.
- the power line has good compatibility with the diesel-modified polyvinyl alcohol, and has excellent barrier properties and sticking properties.
- the protective water-based coating liquid of the present invention as a dispersant for improving the dispersion stability of the pigment, an acetylenic-based dispersant, an acrylic-based dispersant, a polyvinyl alcohol is used.
- the pigment contained in the coating liquid can be evenly distributed, and the pigment can be dispersed in the process of coating and drying. Since it is possible to suppress the formation of fine cracks, it is possible to suppress the distortion caused by the volumetric shrinkage of the coating that occurs during the drying process.
- the pigment present on the surface of the protective layer formed after coating and drying functions as an anti-blocking agent, so it can improve water resistance.
- the dispersant to be used is particularly limited by the effect of the present invention. However, as a recording oil dispersing agent, an acrylic dispersing agent that has a better compatibility and a better knurling property can be obtained.
- the protective layer of the present invention includes a higher fatty acid metal salt, a higher fatty acid salt, a higher fatty acid salt, a paraffin, a porphyry leffin, an oxidized polyphenylene, a force star fix. And other lubricants. By using these lubricants, the lubricant present on the surface of the protective layer formed after coating and drying functions as an anti-blocking agent, thus improving the water resistance. O Can also be used Can also improve
- the protective layer of the present invention can contain a fluorescent brightening agent, and is preferably a diamine stilbene compound. Among them, a triazidinole mino stilbene compound is used. In this way, excellent whiteness can be obtained.
- the amount of polyvinyl alcohol, crosslinking agent, pigment, carboxylic acid, and volatile amine used in the protective layer of the present invention is particularly limited as long as it is within the range of the effect of the present invention. The following ranges are preferably applied, though not.
- Polyvinyl alcohol is 40 to 90% by mass and pigment is 5 to 50% by mass with respect to the total solid content of the protective layer.
- the agent is 0.5
- the amount of addition depends on H, it is more preferably in the range of 0.001 to 20% by mass with respect to the total solid content of the aqueous coating liquid for the protective layer.
- the protective layer dispersants, lubricants, fluorescent brighteners, and UV absorbers such as benzophenone and benzotriazole for the purpose of improving light resistance.
- a wetting agent an anionic or nonionic surfactant having a high molecular weight, an antifoaming agent, etc. are added as necessary.
- the dry coating amount of the protective layer is preferably 0.2 to: 10 g / m 2 :! ⁇ 5 g / m 2 Gayo Ri favored arbitrariness.
- the electron-donating compound that is usually a colorless or light-colored dye precursor contained in the heat-sensitive recording layer constituting the heat-sensitive recording material of the present invention is generally used for a pressure-sensitive recording material or a heat-sensitive recording material.
- dye precursors include the following (1) to (5) When you lift things up
- ⁇ y dimethyl methane-based compound 3 bis (P dimethyl ⁇ -. Nophenyl)-6-dimethyla, naphthyl, /, I lectracton), 3 3-Bis ( ⁇ -Dimethyl Nore, No Phenyl) Fartide, 3-(P-Dimethyla ⁇ ⁇ No Fenil) 1 3 1 (1 2 1 dimethylin 1-3) foot, 3-(P-dimethyla, 2) 2-3-(2 1 ⁇ 3 -yl) Phthalide, 3-(P ⁇ Dimethyla, Nophenyl) 1 3 1 (2 1 Vinyline 3
- These dye precursors can be used alone or in combination of two or more as required.
- the dye-base precursor used is 3-dibutyla, 6-methyl-1, 7-anilinofluorane and 3-(N-ethyl-1-N-isoamyl) Mino-6-methyl-71-2 V Norfluorane and 3-Dipentyla, 6-methyl-1-7-alkylinoleolan and 3- (N-ethyl-4-41-methylphenyl) ), ⁇ _ 6 — Methyl 1 7 — A 2 y Nofluorane and 3 1 Jetylamino 6 — Methyl 7 — (3 1 Methylphen, 2) By adopting at least one of these,
- the thermal recording layer constituting the heat-sensitive recording material of the present invention is a mixture of each aqueous dispersion obtained by pulverizing each color component and a resin. It is obtained by drying on a support.
- the thermal recording layer as a pigment, caustic earth, tanolec, strong ion, calcined kaolin, heavy carbonated calcium, light carbonated calcium, magnesium carbonate, zinc oxide, aluminum oxide Aluminum, Aluminum hydroxide, Magnesium hydroxide, Titanium dioxide, Barium sulfate, Zinc sulfate, Amorphous silica, Amorphous calcium silicate, Colloidal Inorganic pigments such as strength, melamine resin, urine
- -Organic pigments such as formalin resin, polyethylene, nylon, styrene plastic pigments, varinole plastic pigments, hydrocarbon plastic pigments Can be used.
- thermosensitive recording layer A lubricant can be added to the thermosensitive recording layer for the purpose of improving the sticking or the like.
- the lubricant shown in the description of the protective layer and the [pj-like one] are preferably used.
- the heat-sensitive recording layer has an anionic property and a nonionic property as an objective such as an improvement in light resistance, a UV absorber such as a benzophenone or benzotriazolone, a dispersing or wetting agent. Surfactants including high molecular weight ones, fluorescent dyes, antifoaming agents, etc. are added as necessary.
- the coating amount of the thermosensitive recording layer is usually 0.05 to 2.0 g in terms of the absolute dry coating amount of the dye precursor in order to obtain sufficient thermal response.
- the receptive compound is generally represented by a pressure-sensitive recording material or an acidic substance used in a heat-sensitive recording material, but is not particularly limited.
- Salicylyl K 5 — Chloro salicyl chloride,, Salicylic acid, 3, 5-di-tert-Butyl salicylic acid, 3, 5 bis (Hydroxybenzyl) Salicylic acid, 4 ⁇ [2 ⁇ (4 1 ⁇ V phenoxy) ethy loxy] salicylic acid, 3-(o
- the heat-sensitive recording layer constituting the heat-recording material of the present invention can contain a heat-fusible substance in order to improve its heat-responsiveness. In this case, 60 to 180 Those with a melting point of ° C are preferred, especially those with a melting point of 80 to 140 ° C.
- the heat-fusible material occupies 5 to 50% by mass in the total solid content of the heat-sensitive recording layer.
- binder used for the heat-sensitive recording layer it is possible to use various binders that are used in ordinary coating.
- starches hydroxymethylcellulose, methylcellulose, ethenoresenolate, carboxymethylcellulose, gelatin, strong zein, polyvinyl alcohol , Denatured
- one or more undercoat layers made of a pigment or a resin can be provided between the support and the heat-sensitive recording layer.
- the absolute dry coating amount of the undercoat layer is 1
- ⁇ 30 g / m 2 is preferred, and 3 to 20 g Z m 2 is more preferred.
- firing power oline is generally used, but other than that, caustic earth, talc, force oden heavy calcium carbonate, Light calcium carbonate, Magnesium ash, Zinc oxide, Aluminum oxide, Aluminum hydroxide, Magnesium hydroxide, Titanium dioxide, Barium sulfate, 3 ⁇ 4k ⁇
- Inorganic pigments such as lead, non-porous silica, amorphous calcium silicate ⁇ Mouth Idarushi force, melamine resin, urea monoholmarine tree
- Organic pigments such as fats, polyethylene, nylon, styrene plastic pigments, acrylic plastic pigments, hydrocarbon plastic pigments, Organic hollow particle pigments are mentioned, and these can be used alone or in combination.
- the use of organic hollow particle pigments increases the porosity of the undercoat layer, thereby increasing the heat insulation and obtaining a high color development sensitivity, while also increasing the specific surface area per volume. By reducing the water content in the protective layer, the water penetration into the undercoat layer is suppressed during the coating and drying process of the protective layer.
- the bridge reaction of polyvinyloconole which can be progressed in a continuous manner, makes the molecular reaction of the polyvinylolene molecule universal. In order to form a more uniformly cross-linked film, the water resistance can be further improved.
- the organic hollow particle pigment in the present invention is not particularly limited, but includes vinyl chloride, vinyl chloride ⁇ , vinyl acetate, styrene, methyl acrylate, Ethyl acrylate, butyl acrylate, dimethyl bis-2-vinyl chloride, methyl methacrylate, methyl ethyl methacrylate, butynole methacrylate, methyl
- these organic hollow particles include homopolymers mainly composed of monomers such as chlorinated linole and copolymers composed of two or more types of monomers. Average particle diameter determined by laser diffraction particle size distribution measurement
- the volume ratio of the space part to the total volume of the space part) is 20 to 90%, more preferably ⁇ is 40 to 90%.
- Organic hollow particles are, for example, loam and hearth They are commercially available from Japan as Low Pay Series, and from JSR Power as SX Series. Specifically, low peak HP-9 1 (average particle size 1.0 / im, hollowness 51%), low OP OP-6 2 (0.4 ⁇ , 33%), low peak ⁇ ⁇ — 8 4 J (0.5 5 / zm, 20%), SX 8 7 8 2 (A) (1.1 ⁇ ⁇ , 55%), SX 8 7 8
- thermosensitive recording layer As the binder for the undercoat layer in the present invention, various binders used in normal coating can be used as in the case of the heat-sensitive recording layer. Regarding this, it was shown in the description of the thermosensitive recording layer.
- paper is mainly used, but in addition to paper, various woven fabrics, non-woven fabrics, ⁇ -component resin foams, and ⁇ -component resin substrates.
- Mineral paper, synthetic paper, metal foil, vapor-deposited sheet, or multiple ⁇ -sheets obtained by combining them together can be used arbitrarily according to the purpose.
- the support used in the heat-sensitive recording material of the present invention is a special one.
- the surface on the side of the heat-sensitive recording layer is not limited to
- the knock coat layer may be a known one, and is not particularly limited.
- an adhesive layer can be provided on the opposite side of the support on which the heat-sensitive recording layer and the protective layer are provided, if necessary.
- the pressure-sensitive adhesive layer is a known one, and is not particularly limited
- Release paper can be provided on the opposite side of the support of the present invention on the opposite side of the thermal recording layer and protective layer, if necessary. O Use well-known release paper. There is no particular limitation.
- a magnetic recording layer can be provided on the opposite side of the support, on the opposite side of the thermal recording layer and protective layer, as necessary.
- ⁇ Well-known magnetic recording can be used.
- the method for producing the heat-sensitive recording material of the present invention comprises forming a heat-sensitive recording layer that develops color by heat and its protective layer on a support in this order by HX.
- the protective layer contains polyvinyl vinyl, a cross-linking agent, a pigment, an carboxylic acid and a volatile amine, and at least a carboxylic acid, a volatile compound. It is characterized in that an aqueous coating solution prepared by adding a functional dye and a crosslinking agent in this order is coated and dried on the heat-sensitive recording layer.
- the method for producing the heat-sensitive recording material of the present invention is as follows.
- a water-based coating liquid for a protective layer a mother liquor mixed with polyvinyl alcohol, pigments, etc., carboxylic acid, volatile amine
- the reason for limiting the order of addition of the three types of components to j ⁇ 1 is as described above, which is characterized by the use of those prepared by adding cross-linking agents in this order.
- the water-based coating solution can suppress the progress of the cross-linking reaction of polyvinyl alcohol in the coating solution and can provide an aqueous coating solution with excellent stability.
- the water-based coating liquid preferably has a pH of less than 6 after the addition of allenic acid and a pH of 7 or more after the addition of the volatile amine.
- the reason for this is that, as described above, not only can the water resistance of the protective layer be further increased, but also the stability of the coating liquid can be further improved.
- the heat recording layer and the protective layer are formed as the essential layers, and the ink layer, the coating layer, and the undercoat layer are formed as the optional layers.
- the method of forming these layers is not particularly limited, and can be formed according to a conventionally known technique. Specific examples include film press coating, air knife coating, rod blade coating, bar coating, blade coating, gravure coating, curtain coating.
- Each layer can be formed by applying the coating liquid by a method such as E-bar coating and drying.
- each layer may be formed by various printing machines using a method such as a lithographic printing plate, a relief printing plate, a flexo plate, a dalabia screen, a screen, and a hot melt.
- air-naf coating which is less affected by the viscosity of the coating solution, is more preferable for forming the protective layer.
- Example 1 The parts and% shown below are based on the amount of deviation and deviation, and the coating amount is the absolute dry coating amount.
- a dispersion B was prepared by dispersing in a mixture of 20 parts of a aqueous solution of livino-reco-inole and 60 parts of water, and pulverizing with a bead mill until the volume average particle size became 1 ⁇ m.
- the mixture shown below was mixed and stirred sufficiently to prepare a thermal recording layer coating liquid.
- Dispersion A 1 0 0 parts
- Dispersion B 1 0 0 parts
- Dispersion C 1 0 0 parts
- aqueous solution 1 3 parts and 98 parts of water were mixed to prepare an aqueous solution 1 in which a carboxylic acid and a volatile amine were mixed.
- the mixture shown below was mixed in the order, and the mixture was stirred for 2 hours to prepare an aqueous coating liquid for a protective layer. Note that the pH of the aqueous coating solution for si layer was 6.8.
- the Tsubosato 5 0 g / m 2 fine paper neutral coating E amount 9 g / m 2 of the subbing Ri layer coating liquid, the coating amount of the heat-sensitive recording layer coating liquid, coating of the dye precursor In order to obtain an undercoat layer and a heat-sensitive recording layer, coating was sequentially carried out so that the total amount was 0 5 gm 2 . Then, after bar coating on the heat-sensitive recording layer so that the coating amount of the aqueous coating liquid for the protective layer is 2 g / m 2 , force-rendering is performed to produce a heat-sensitive recording material. O Nane, the surface of the protective layer coated with the produced thermal recording material
- thermosensitive recording material was produced in the same manner as in Example 1 except that the aqueous coating liquid for protective layer was produced by the following procedure in the production of aqueous coating liquid for protective layer in Example 1 (3). First, 50% lactic acid aqueous solution
- aqueous solution 2 3 parts 25 parts of 25% aqueous ammonia solution was mixed with 95 parts of water and 95 parts of water to prepare aqueous solution 2 in which hexamic acid and volatile amine were mixed.
- aqueous solution 2 3 parts 25 parts of 25% aqueous ammonia solution was mixed with 95 parts of water and 95 parts of water to prepare aqueous solution 2 in which hexamic acid and volatile amine were mixed.
- the following blending and mixing were carried out in the following order, and the mixture was stirred for 2 hours to prepare an aqueous coating liquid for a protective layer.
- the aqueous coating liquid for protective layer had a pH of 68, and the surface pH of the protective layer surface coated with the produced thermosensitive recording material was 5.6.
- thermosensitive recording material was prepared in the same manner as in Example 1 except that the aqueous coating liquid for layer was prepared by the following procedure. 50% lactic acid aqueous solution
- aqueous solution 3 3 in which carboxylic acid and volatile amine were mixed.
- the following blending and mixing were performed in the order shown below, and the mixture was stirred for 2 hours to prepare an aqueous coating liquid for a protective layer.
- ⁇ ⁇ ) 3 ⁇ 4 The aqueous coating liquid has a surface density of 3 and the surface of the protective layer coated with the heat-sensitive recording material was 5 6.
- thermosensitive recording material was prepared in the same manner as in Example 1 except that the aqueous coating liquid for 6 layer was prepared by the following procedure. 50% aqueous lactic acid solution
- the aqueous coating liquid for protective ⁇ was prepared by stirring for 2 hours. Note that ⁇ ⁇ layer 3 ⁇ 4 aqueous coating solution The pH of the film was 8 • 3, and the surface PH of the protective layer surface coated with the produced thermal recording material was 5.7.
- aqueous coating liquid for the protective layer by preparing the aqueous coating liquid for the protective layer in the following composition and mixing in the order shown below in preparation of the aqueous coating liquid for the protective layer in Example 1 (3). Except for the above, a thermosensitive recording material was produced in the same manner as in Example 1 and
- the pH after addition of the aqueous lactic acid solution was 3.7
- the pH after addition of the aqueous ammonia solution was 86
- the pH of the aqueous coating solution for the protective layer was 8.3 • 9,
- the surface PH of the protective layer coated with the heat-sensitive recording material was 5.7.
- Example 6 In preparation of the aqueous coating liquid for protective layer of Example 1 (3), mix the aqueous coating liquid for protective layer in the following composition and order, and stir for 2 hours to obtain the aqueous coating liquid for protective layer.
- a thermosensitive recording material was produced in the same manner as in Example 1 except that it was prepared.
- the aqueous coating liquid for protective layer had a pH of 83, and the surface PH of the protective layer tfi coated with the produced thermal recording material was 5.6.
- aqueous coating liquid for protective layer was mixed in the following composition and order, and stirred for 2 hours to prepare an aqueous coating liquid for protective layer.
- a pyrophoric recording material was produced in the same manner as in Example 1.
- the pH after addition of the lactic acid aqueous solution was 37
- the pH after addition of the ammonia aqueous solution was 8.6
- the pH of the aqueous coating liquid for protective layer was 8.5.
- the surface pH of the protective layer surface coated with the heat-sensitive recording material thus prepared was 5.8.
- Example 3 In preparation of aqueous coating liquid for protective layer, the aqueous coating liquid for protective layer was mixed in the following composition and order, and stirred for 2 hours to prepare an aqueous coating liquid for protective layer.
- a thermosensitive recording material was produced in the same manner as in Example 1.
- the aqueous coating liquid for protective layer had a pH of 85, and the surface pH of the protective layer surface coated with the produced thermosensitive recording material was 5.8.
- Example 1 A heat-sensitive recording material was prepared in the same manner as in Example 1 except that the aqueous coating liquid for layer was mixed in the following order and mixed in order and stirred for 2 hours to prepare an aqueous coating liquid for protective layer.
- the aqueous coating liquid for protective layer had a pH of 85, and the surface pH of the protective layer surface coated with the produced thermosensitive recording material was 5.8.
- Example 1 (3) In preparation of aqueous coating liquid for protective layer in Example 1 (3), except that water-based coating liquid for protective layer 'was mixed in the following composition and order, and stirred for 2 hours to prepare an aqueous coating liquid for protective layer.
- a thermosensitive recording material Produced a thermosensitive recording material in the same manner as in Example 1.
- the pH of the aqueous coating liquid for the protective layer was 85, and the surface pH of the S-coated layer tfi was 5.8.
- Example 1 Preparation of water-based coating liquid for protective layer, except that water-based coating liquid for protective layer was mixed in the following composition and order, and stirred for 2 hours to prepare water-based coating liquid for protective layer.
- a thermosensitive recording material was produced in the same manner as in Example 1.
- the aqueous coating liquid for the protective layer had a pH of 8.5, and the surface pH of the protective layer surface to which the heat-sensitive recording material was applied was 5.8.
- aqueous coating liquid for protective layer of Example 1 (3) In preparation of aqueous coating liquid for protective layer of Example 1 (3), the aqueous coating liquid for protective layer was mixed in the following composition and order, and stirred for 2 hours. Then, a heat-sensitive recording material was produced in the same manner as in Example 1, except that a protective aqueous liquid was produced.
- the ⁇ of the aqueous coating liquid for the protective layer was 84, and the surface P ⁇ of the protective layer surface of the produced thermal recording material was 5.8.
- Example 1 3 Under Example 1 (1), in the preparation of the coating solution, instead of using 100 parts of annunciator and 200 parts of water, Cus
- the aqueous coating liquid for the protective layer was mixed in the order shown below and mixed for 2 hours.
- a heat-sensitive recording material was prepared in the same manner as in Example 1 and
- the pH of the aqueous coating liquid for the protective layer is 8.4, and the surface pH of the coated protective surface of the prepared thermal recording material is 5.8.
- Example 1 (2) Thermal recording layer 'Coating his work ⁇ Dispersion A>, 3-Dibutyla, No. 61, 1-Methyl, 1--A2 dinofluoran, 20 parts Instead of this, prepare dispersion A using 20 parts of 3- (N-ethyl-N-soamyl) amino-6-methyl-1-7-aminofluoran, and carry out further.
- Example 1 (3) Preparation of the aqueous coating liquid for the protective layer, mix the aqueous coating liquid for the protective layer in the following composition and order, and stir for 2 hours to prepare the aqueous coating liquid for the protective layer. Except that it was manufactured, a thermal recording material was prepared as in Example 1. The pH of the aqueous coating liquid for the protective layer was 8 4, and the surface pH of the surface of the protective layer coated with the produced thermosensitive recording material was 5 8.
- aqueous coating liquid for protective layer of Example 1 (3) In preparation of aqueous coating liquid for protective layer of Example 1 (3), the aqueous coating liquid for protective layer was mixed in the following composition and order, and stirred for 2 hours. Then, a heat-sensitive recording material was produced in the same manner as in Example 1 except that a protective aqueous coating solution was prepared.
- the pH of the aqueous coating solution for the protective layer was 8.3, and Table SP P on the surface of the protective layer coated with the produced thermal recording material was 5.6.
- aqueous coating liquid for protective layer was mixed in the following composition and order, and stirred for 2 hours to prepare an aqueous coating liquid for protective layer.
- a thermosensitive recording material was produced in the same manner as in Example 1.
- the aqueous coating liquid for the protective layer had a pH of 8.3, and the surface p of the protective layer surface of the produced thermal recording material was 5.6.
- the aqueous coating liquid for protective layer was mixed in the following composition and order, and at 2 o'clock, the aqueous coating liquid for protective layer was prepared.
- a thermosensitive recording material was produced in the same manner as in Example 1.
- the aqueous coating liquid for the protective layer had a pH of 83, and the surface PH of the protective layer surface of the produced thermosensitive recording material was 5.6.
- the aqueous coating liquid for protective layer was mixed in the following composition and order, and stirred for 2 hours. Except that was prepared, a thermal recording material was produced in the same manner as in Example 1 and
- the aqueous coating liquid for protective layer had a pH of 83, and the surface PH of the protective layer surface coated with the produced thermal recording material was 5.6. 1 0% DF 1 1 7 Aqueous solution 1 5 0 parts
- Example 1 Prepare a coating solution for the primer coating layer using 7 25 parts, AF 10 5 5 and 100 parts of water, and 1 2 75 parts of water.Roughly, for the protective layer (3) of Example 1
- the heat-sensitive coating was made in the same manner as in Example 1 except that the aqueous coating liquid for the protective layer was mixed in the order shown below and stirred for 2 hours to prepare the aqueous coating liquid for the protective layer.
- a recording material was produced.
- the pH of the water-based coating liquid for the protective layer was 8.3, and the surface PH of the surface of the protective layer coated with the produced thermal recording material was 5.6.
- aqueous coating liquid for protective layer in Example 1 (3), except that the aqueous coating liquid for ⁇ layer was mixed in the following composition and order, and stirred for 2 hours to prepare an aqueous coating liquid for protective layer Produced a thermosensitive recording material in the same manner as in Example 1.
- the ⁇ of the aqueous coating liquid for the protective layer was 81, and the surface PH of the protective layer surface coated with the produced thermosensitive recording material was 4.3.
- aqueous coating liquid for protective layer was mixed in the following composition and order, and stirred for 2 hours to prepare an aqueous coating liquid for protective layer.
- thermosensitive recording materials instead of neutral high-quality paper with a basis weight of 50 g and m 2 , a basis weight of 50 g Z m 2 der is, except that the surface p H of the side providing the heat-sensitive recording layer was used 5. woodfree paper acidic is 8, to prepare a thermosensitive recording material in the same manner as in example 1.
- the aqueous coating liquid for the protective layer had a pH of 8.5, and the surface pH of the protective layer surface of the produced thermosensitive recording material was 5.1.
- aqueous coating liquid for protective layer was mixed in the following composition and order, and stirred for 2 hours to prepare an aqueous coating liquid for protective layer.
- the aqueous coating liquid for protective layer was mixed in the following composition and order, and stirred for 2 hours to prepare an aqueous coating liquid for 5 km.
- the basis weight in the rolled-up state is 50 g Z m 2 of neutral high-quality paper.
- g Z m 2 the thermosensitive Symbol recording layer coating solution 0 Nurye weight in coating weight of the dye precursor.
- 5 g Roh m 2 the protective layer aqueous coating liquid coated amount to 2 g Roh m 2 Sequentially apply a dry coat to form an undercoat layer, a thermal recording layer, and a protective layer, then perform a force render process, and roll up the protective layer to the outside.
- a heat-sensitive recording material was produced.
- the ⁇ of the aqueous coating liquid for the protective layer was 8.5, and the surface ⁇ H of the surface of the protective layer coated with the produced thermal recording material was 5.8.
- aqueous coating liquid for protective layer of Example 1 (3) In preparation of aqueous coating liquid for protective layer of Example 1 (3), the aqueous coating liquid for protective ⁇ was mixed in the following composition and order, and stirred for 2 hours. Then, a heat-sensitive recording material was produced in the same manner as in Example 1 except that an aqueous coating liquid for protective layer was prepared.
- the aqueous coating liquid for the protective layer had a pH of 7.6, and the surface pH of the protective layer surface of the produced thermal recording material was 5.5.
- Example 1 (3) In preparation of the protective layer aqueous coating solution, Example 1 and Example 1 were prepared except that the protective layer aqueous coating solution was mixed in the following composition and order to prepare the protective layer aqueous coating solution. Similarly, a heat-sensitive recording material was prepared. The pH of the aqueous coating liquid for the protective layer was 3.2.
- Example 1 In preparation of the protective layer aqueous coating solution, Example 1 and Example 1 were prepared except that the protective layer aqueous coating solution was mixed in the following composition and order to prepare the protective layer aqueous coating solution. Similarly, thermal recording material The material was prepared. The pH of the aqueous coating liquid for the protective layer is 9.8, and the surface pH of the protective layer surface to which the produced thermal recording material is applied is 7.
- Example 1 (3) In preparation of the protective layer aqueous coating liquid, Example 1 and Example 1 were prepared except that the protective layer aqueous coating liquid was mixed in the following composition and order to prepare the protective layer aqueous coating liquid. Similarly, a heat-sensitive recording material was prepared. The pH of the aqueous coating liquid for the protective layer is 7.3, and the surface pH of the protective layer surface coated with the produced thermal recording material is 6.
- Example 1 8% adipic acid dihydrazide aqueous solution 1 8 parts or more Examples:!
- the thermal recording materials prepared in ⁇ 24 and Comparative Examples 1 to 3 were subjected to the following evaluation. In each result, Example 1
- Examples 7 to 12 are shown in Table 1
- Examples 13 to 19 are shown in Table 3
- Examples 20 to 24, and Comparative Examples 1 to 3 are shown in Table 4.
- test ⁇ was printed in an environment of C / 6 5% RH, and white spots, horizontal streaks, and sticky sound were evaluated at that time. ⁇ The evaluation criteria were as follows.
- the reflection density of the image area obtained with the non-less 1.0 m sec is 1.2 or more.
- ⁇ The reflection density of the image area obtained with a non-noise of 1.0 m sec is less than 1.2, and the reflection density of the image area obtained with a no-less width of 14 m sec is 1.2 or more.
- ⁇ Whiteness of 90 or more and less than 95.
- X Whiteness is less than 85.
- Examples 1 to 23 are superior to Comparative Example 1 in terms of coating solution stability.
- an aqueous solution of ammonia which is volatile, is added to the aqueous coating liquid for the protective layer.
- Examples 1 to 2 3 are more water resistant and water resistant than Comparative Examples 2 and 3.
- Those who excel in the quality of the protective layer contain lactic acid or hydrochloric acid, which is arsenic acid, in the protective layer.
- An excellent water-resistant speed can be achieved by reducing the surface pH of the protective layer to be less than 6.
- Examples 3-6 are excellent in coating liquid stability compared with Examples 1 and 2.
- the former has an aqueous coating liquid for the protective layer with a pH of 7 or higher.
- Example 4 is superior to Example 3 in terms of coating solution stability.
- For the former increase the pH of the protective layer aqueous coating solution to 8 or higher.
- Example 5 is superior to Example 4 in terms of coating solution stability.
- the former is used to prepare a water-based water-based coating solution.
- the aqueous solution and the carrier are added in this order.
- Example 6 is inferior to Examples 3-5 in terms of coating solution stability.
- the former is a cross-linking agent, an aqueous hexamic acid solution, an aqueous ammonia solution, when preparing an aqueous coating solution for a protective layer.
- Examples 7 to 12 are examples 1 to
- a person who is superior in water resistance to 6 contains diacetone modified polyvinyl alcohol in the protective layer.
- Example 8 is more effective than Example 7 in coating fluid.
- J's protective layer contains diacetylene-modified polyvinyl alcohol with a polymerization degree of 1,00,00 and a test degree of 98.5%.
- Example 9 is superior to Examples 7 and 8 in barrier properties, but those having poor coating stability have a degree of polymerization of 3, 00 and a degree of experimentation in the protective layer of 9 8. Contains 5% diamine-modified polyvinyl alcohol.
- Examples 10 to 12 are almost the same as Example 9 in terms of cutting properties.
- Example 11 1 has better coating solution stability than Example 10 when containing 5% diacetate-modified polyvinyl alcohol. In addition, it contains diacetone-modified polyvinyl alcohol with a degree of incubation of 965%.
- Example 12 is superior to Examples 7 to 11 in terms of water resistance, good coating solution stability, and vacuum properties.
- the protective layer contains diacetone-modified poly (vinyl alcohol) having a heavy ⁇ degree of 1, 0 0 and a test degree of 96.5%, and adipic acid dihydradi K. Les As can be seen from FIGS. 2 and 3, Examples 13 to 19 are superior to Example 7 in terms of water resistance rate and coating liquid stability, and show good water resistance.
- Example-L 3 to 19 were prepared by adding aqueous solution of ammonium acid, aqueous solution of ammonia and dihydrazine adipate K in this order when preparing the aqueous coating liquid for the protective layer.
- the pH of the aqueous coating liquid for protective layer is 8 or more.
- the surface pH of the formed protective layer is less than 6, and the protective layer contains diene-modified polyvinyl alcohol.
- Examples 1 3 and 1 4 are superior in color development sensitivity compared to Examples 1 5 to 1 8, and Example 1 3 contains organic hollow particles in the undercoat layer. 4 contains 3 — (N-ethyl-N-soamyl) a, 6-methylone, 7-anilinofluorane in the thermal recording layer.
- Examples 15 to 18 are superior in barrier properties to Examples 13 and 14.
- the former contains force ions in the protective layer.
- the protective layer contains an acrylic dispersant.
- Example 17 is superior to Examples 13 to 16 in terms of sticking property.
- the former contains a lubricant in the heel layer.
- Example 18 is superior to Examples 13 to 17 in whiteness.
- /- ⁇ IJs contain a fluorescent brightener in the protective layer.
- Example 19 shows better coating solution stability, no-varying property, color development sensitivity, sticking property, and whiteness than those of Examples 13 to 18.
- the former contains 2 ⁇ organic particles in the undercoat layer, and contains a protective resin, acrylic dispersant, lubricant, and optical brightener in the protective layer.
- Example 20 is compared to Example 7 *,
- the o uses inorganic acid as the carboxylic acid, and the latter uses hydride and ⁇ -xic acid.
- Example 21 is superior to Example ⁇ in terms of water resistance.
- the former uses high-quality paper that shows acidity on the surface ⁇ ⁇ on the side where the thermal recording layer is provided on the support.
- Example 2 2 is inferior to Example 1 2 in terms of water resistance.
- the former uses high-quality paper whose surface ⁇ ⁇ on the side where the thermal recording layer is provided on the support is basic.
- Example 2 3 is more resistant to water resistance and rear performance than Example 7.
- the m person forms the protective layer by air knife coating.
- Example 24 is superior to Example 7 in terms of water resistance, but is inferior in coating solution stability.
- the former uses neutralized salts, and the latter uses arehenic acid and volatile amines.
- the present invention it is possible to provide a heat-sensitive recording material that has a rapid water resistance rate, exhibits a high level of water resistance, and has a stable productivity due to the excellent stability of the coating liquid. I can do it.
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Heat Sensitive Colour Forming Recording (AREA)
Abstract
Description
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DE112008002571.1T DE112008002571B4 (de) | 2007-09-28 | 2008-09-29 | Thermisches Aufzeichnungsmaterial und Verfahren für die Herstellung desselben |
JP2009534465A JP5258062B2 (ja) | 2007-09-28 | 2008-09-29 | 感熱記録材料及びその製造方法 |
US12/733,903 US8062994B2 (en) | 2007-09-28 | 2008-09-29 | Thermal recording material and process for the production thereof |
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JP2013237215A (ja) * | 2012-05-16 | 2013-11-28 | Ricoh Co Ltd | 感熱記録材料及びその製造方法 |
JP2014136363A (ja) * | 2013-01-17 | 2014-07-28 | Oji Holdings Corp | 感熱記録体 |
EP2281694B2 (en) † | 2009-08-05 | 2016-03-23 | Ricoh Company, Ltd. | Thermosensitive recording material |
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WO2014111292A1 (en) | 2013-01-18 | 2014-07-24 | Basf Se | Acrylic dispersion-based coating compositions |
EP3474073B1 (en) * | 2017-10-17 | 2022-12-07 | Agfa Offset Bv | A method for making a printing plate |
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JP2005335295A (ja) * | 2004-05-28 | 2005-12-08 | Nippon Paper Industries Co Ltd | 感熱記録体 |
JP2006082373A (ja) * | 2004-09-16 | 2006-03-30 | Ricoh Co Ltd | 感熱記録材料 |
JP2007230233A (ja) * | 2006-02-03 | 2007-09-13 | Ricoh Co Ltd | 感熱記録材料及びその製造方法 |
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EP0899126B1 (en) * | 1997-08-25 | 2002-12-18 | Oji Paper Co., Ltd. | Heat sensitive recording material |
JP4041585B2 (ja) | 1998-07-06 | 2008-01-30 | 日本酢ビ・ポバール株式会社 | 感熱記録用材料およびその製造方法 |
JP3716736B2 (ja) * | 2000-10-20 | 2005-11-16 | 王子製紙株式会社 | 感熱記録体 |
US6800588B2 (en) * | 2000-12-04 | 2004-10-05 | Fuji Photo Film Co., Ltd. | Thermal recording material |
JP4221163B2 (ja) * | 2001-03-23 | 2009-02-12 | 株式会社リコー | 感熱記録材料及びその製造方法 |
JP2003182235A (ja) * | 2001-12-20 | 2003-07-03 | Fuji Photo Film Co Ltd | 感熱記録材料 |
US20070184978A1 (en) * | 2006-02-03 | 2007-08-09 | Shinji Takano | Thermosensitive recording material and method of producing the same |
-
2008
- 2008-09-29 JP JP2009534465A patent/JP5258062B2/ja active Active
- 2008-09-29 DE DE112008002571.1T patent/DE112008002571B4/de active Active
- 2008-09-29 WO PCT/JP2008/068121 patent/WO2009041744A1/ja active Application Filing
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Patent Citations (3)
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JP2005335295A (ja) * | 2004-05-28 | 2005-12-08 | Nippon Paper Industries Co Ltd | 感熱記録体 |
JP2006082373A (ja) * | 2004-09-16 | 2006-03-30 | Ricoh Co Ltd | 感熱記録材料 |
JP2007230233A (ja) * | 2006-02-03 | 2007-09-13 | Ricoh Co Ltd | 感熱記録材料及びその製造方法 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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EP2281694B2 (en) † | 2009-08-05 | 2016-03-23 | Ricoh Company, Ltd. | Thermosensitive recording material |
JP2013237215A (ja) * | 2012-05-16 | 2013-11-28 | Ricoh Co Ltd | 感熱記録材料及びその製造方法 |
JP2014136363A (ja) * | 2013-01-17 | 2014-07-28 | Oji Holdings Corp | 感熱記録体 |
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US20110053769A1 (en) | 2011-03-03 |
US8062994B2 (en) | 2011-11-22 |
JP5258062B2 (ja) | 2013-08-07 |
JPWO2009041744A1 (ja) | 2011-01-27 |
DE112008002571T5 (de) | 2010-08-12 |
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