WO2022085657A1 - 感熱記録体 - Google Patents
感熱記録体 Download PDFInfo
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- WO2022085657A1 WO2022085657A1 PCT/JP2021/038517 JP2021038517W WO2022085657A1 WO 2022085657 A1 WO2022085657 A1 WO 2022085657A1 JP 2021038517 W JP2021038517 W JP 2021038517W WO 2022085657 A1 WO2022085657 A1 WO 2022085657A1
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- Prior art keywords
- heat
- urea
- phenyl
- carbon atoms
- group
- Prior art date
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- 238000010521 absorption reaction Methods 0.000 claims abstract description 21
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- 125000003545 alkoxy group Chemical group 0.000 claims abstract description 5
- 125000005843 halogen group Chemical group 0.000 claims abstract description 5
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims abstract description 4
- -1 Urea urethane compound Chemical class 0.000 claims description 74
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- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 31
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- 239000007787 solid Substances 0.000 claims description 21
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 20
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- VWLHFWQFHPTOKY-UHFFFAOYSA-N [3-[[3-(4-methylphenyl)sulfonyloxyphenyl]carbamoylamino]phenyl] 4-methylbenzenesulfonate Chemical compound CC1=CC=C(C=C1)S(=O)(=O)OC=1C=C(C=CC=1)NC(=O)NC1=CC(=CC=C1)OS(=O)(=O)C1=CC=C(C)C=C1 VWLHFWQFHPTOKY-UHFFFAOYSA-N 0.000 claims description 5
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- ZJOLCKGSXLIVAA-UHFFFAOYSA-N ethene;octadecanamide Chemical compound C=C.CCCCCCCCCCCCCCCCCC(N)=O.CCCCCCCCCCCCCCCCCC(N)=O ZJOLCKGSXLIVAA-UHFFFAOYSA-N 0.000 description 1
- MFGZXPGKKJMZIY-UHFFFAOYSA-N ethyl 5-amino-1-(4-sulfamoylphenyl)pyrazole-4-carboxylate Chemical compound NC1=C(C(=O)OCC)C=NN1C1=CC=C(S(N)(=O)=O)C=C1 MFGZXPGKKJMZIY-UHFFFAOYSA-N 0.000 description 1
- OYQYHJRSHHYEIG-UHFFFAOYSA-N ethyl carbamate;urea Chemical class NC(N)=O.CCOC(N)=O OYQYHJRSHHYEIG-UHFFFAOYSA-N 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
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- 239000007850 fluorescent dye Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- MDQRDWAGHRLBPA-UHFFFAOYSA-N fluoroamine Chemical compound FN MDQRDWAGHRLBPA-UHFFFAOYSA-N 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- HHLFWLYXYJOTON-UHFFFAOYSA-N glyoxylic acid Chemical compound OC(=O)C=O HHLFWLYXYJOTON-UHFFFAOYSA-N 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- FEEPBTVZSYQUDP-UHFFFAOYSA-N heptatriacontanediamide Chemical compound NC(=O)CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC(N)=O FEEPBTVZSYQUDP-UHFFFAOYSA-N 0.000 description 1
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 230000033444 hydroxylation Effects 0.000 description 1
- 238000005805 hydroxylation reaction Methods 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011630 iodine Substances 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- 239000001282 iso-butane Substances 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- 229910001629 magnesium chloride Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002609 medium Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 235000010270 methyl p-hydroxybenzoate Nutrition 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- VYQNWZOUAUKGHI-UHFFFAOYSA-N monobenzone Chemical compound C1=CC(O)=CC=C1OCC1=CC=CC=C1 VYQNWZOUAUKGHI-UHFFFAOYSA-N 0.000 description 1
- 229960000990 monobenzone Drugs 0.000 description 1
- 125000002950 monocyclic group Chemical group 0.000 description 1
- RQAQWBFHPMSXKR-UHFFFAOYSA-N n-(4-chlorophenyl)-3-(phosphonooxy)naphthalene-2-carboxamide Chemical compound OP(O)(=O)OC1=CC2=CC=CC=C2C=C1C(=O)NC1=CC=C(Cl)C=C1 RQAQWBFHPMSXKR-UHFFFAOYSA-N 0.000 description 1
- MJGLMEMIYDUEHA-UHFFFAOYSA-N n-(4-methylphenyl)-3-oxobutanamide Chemical compound CC(=O)CC(=O)NC1=CC=C(C)C=C1 MJGLMEMIYDUEHA-UHFFFAOYSA-N 0.000 description 1
- 125000002004 n-butylamino group Chemical group [H]N(*)C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000000740 n-pentyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- QUBQYFYWUJJAAK-UHFFFAOYSA-N oxymethurea Chemical class OCNC(=O)NCO QUBQYFYWUJJAAK-UHFFFAOYSA-N 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 125000000951 phenoxy group Chemical group [H]C1=C([H])C([H])=C(O*)C([H])=C1[H] 0.000 description 1
- QHDYIMWKSCJTIM-UHFFFAOYSA-N phenyl 1-hydroxynaphthalene-2-carboxylate Chemical compound C1=CC2=CC=CC=C2C(O)=C1C(=O)OC1=CC=CC=C1 QHDYIMWKSCJTIM-UHFFFAOYSA-N 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 229920000768 polyamine Chemical class 0.000 description 1
- 125000003367 polycyclic group Chemical group 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920013716 polyethylene resin Polymers 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920005990 polystyrene resin Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 125000002572 propoxy group Chemical group [*]OC([H])([H])C(C([H])([H])[H])([H])[H] 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 235000010232 propyl p-hydroxybenzoate Nutrition 0.000 description 1
- QELSKZZBTMNZEB-UHFFFAOYSA-N propylparaben Chemical compound CCCOC(=O)C1=CC=C(O)C=C1 QELSKZZBTMNZEB-UHFFFAOYSA-N 0.000 description 1
- 229960003415 propylparaben Drugs 0.000 description 1
- 238000001454 recorded image Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- PYWVYCXTNDRMGF-UHFFFAOYSA-N rhodamine B Chemical compound [Cl-].C=12C=CC(=[N+](CC)CC)C=C2OC2=CC(N(CC)CC)=CC=C2C=1C1=CC=CC=C1C(O)=O PYWVYCXTNDRMGF-UHFFFAOYSA-N 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 230000008313 sensitization Effects 0.000 description 1
- 230000001235 sensitizing effect Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 235000010339 sodium tetraborate Nutrition 0.000 description 1
- 239000004328 sodium tetraborate Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000011115 styrene butadiene Substances 0.000 description 1
- 229920005792 styrene-acrylic resin Polymers 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 150000003585 thioureas Chemical class 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 239000011135 tin Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 125000002088 tosyl group Chemical group [H]C1=C([H])C(=C([H])C([H])=C1C([H])([H])[H])S(*)(=O)=O 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- UORVGPXVDQYIDP-UHFFFAOYSA-N trihydridoboron Substances B UORVGPXVDQYIDP-UHFFFAOYSA-N 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 239000013053 water resistant agent Substances 0.000 description 1
- 229920003170 water-soluble synthetic polymer Polymers 0.000 description 1
- 150000003751 zinc Chemical class 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/30—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using chemical colour formers
- B41M5/333—Colour developing components therefor, e.g. acidic compounds
- B41M5/3333—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
- B41M5/30—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using chemical colour formers
- B41M5/333—Colour developing components therefor, e.g. acidic 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
-
- 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
- B41M5/323—Organic colour formers, e.g. leuco dyes
-
- 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
-
- 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
- B41M5/30—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using chemical colour formers
- B41M5/337—Additives; Binders
- B41M5/3377—Inorganic compounds, e.g. metal salts of organic acids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
- B41M5/41—Base layers supports or substrates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M2205/00—Printing methods or features related to printing methods; Location or type of the layers
- B41M2205/04—Direct thermal recording [DTR]
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M2205/00—Printing methods or features related to printing methods; Location or type of the layers
- B41M2205/38—Intermediate layers; Layers between substrate and imaging layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
- B41M5/42—Intermediate, backcoat, or covering layers
- B41M5/44—Intermediate, backcoat, or covering layers characterised by the macromolecular compounds
Definitions
- the present invention relates to a heat-sensitive recorder.
- a heat-sensitive recorder that records a color-developed image by utilizing a heat-coloring reaction between a colorless or light-colored leuco dye and a phenol or an organic acid has been widely put into practical use. Since such a heat-sensitive recorder forms a color-developed image simply by heating, it has advantages such as a compact recording device, easy maintenance of the recording device, and less noise generation. Therefore, the thermal recorder is widely used as various information recording materials in issuing machines such as label printers, automatic ticket vending machines, CD / ATMs, order slip output machines such as restaurants, and data output machines of scientific research equipment. There is.
- Patent Document 1 proposes a heat-sensitive recorder using a diarylurea derivative as a color developer.
- the heat-sensitive recording material described in Patent Document 1 has insufficient alcohol resistance, plasticizer resistance, and water-plasticizer resistance, and has room for improvement.
- the main object of the present invention is to provide a heat-sensitive recording body having excellent alcohol resistance, plasticizer resistance, and water plasticizer resistance.
- the present inventors have solved the above-mentioned problems as a result of repeated diligent studies in view of the above-mentioned prior art. That is, the present invention relates to the following thermal recording body.
- Item 1 In a heat-sensitive recording body having a hollow particle, an undercoat layer containing an adhesive and an inorganic pigment I, and a heat-sensitive recording layer containing a leuco dye, a color developer and an inorganic pigment II on a support in this order.
- a coloring agent As a coloring agent, the following general formula (1):
- R 2 represents an alkyl group having 1 to 12 carbon atoms, an aralkyl group having 7 to 12 carbon atoms or an aryl group having 6 to 12 carbon atoms, and the aralkyl group and the aryl group have 1 to 12 carbon atoms. It may be substituted with an alkyl group, an alkoxy group having 1 to 12 carbon atoms, an aryl group having 6 to 12 carbon atoms or a halogen atom, and the plurality of R 2s may be the same or different.
- a 1 Represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and a plurality of A1s may be the same or different.
- Item 2 The heat-sensitive recording material according to Item 1, wherein the content ratio of the inorganic pigment I is 60% by mass or less of the total solid content of the undercoat layer.
- Item 3 The heat-sensitive recording body according to Item 1 or 2, wherein the oil absorption amount of the inorganic pigment I is 130 ml / 100 g or less.
- Item 4 The heat-sensitive recorder according to any one of Items 1 to 3, wherein the inorganic pigment II is at least one selected from the group consisting of calcium carbonate, aluminum hydroxide and clay.
- Item 5 The maximum particle diameter (D100) of the hollow particles is 10 to 40 ⁇ m, the average particle diameter (D50) is 4.0 to 15 ⁇ m, and the maximum particle diameter (D100) and the average particle diameter (D50) are Item 6.
- Item 6 The heat-sensitive recording body according to any one of Items 1 to 5, wherein the hollow ratio of the hollow particles is 80 to 98%.
- Item 7 The heat-sensitive recording material according to any one of Items 1 to 6, wherein the undercoat layer contains an adhesive having a glass transition temperature of ⁇ 10 ° C. or lower.
- Item 8 The heat-sensitive recording layer is further used as a second color developer by the following general formula (2):
- n represents an integer of 1 to 6
- n contains at least one selected from the group consisting of a diphenyl sulfone cross-linked compound and 4,4'-bis (3-tosyl ureido) diphenylmethane.
- Item 9 The heat-sensitive recorder according to Item 8, wherein the content of the second color developer is 0.2 to 3 parts by mass with respect to 1 part by mass of the leuco dye.
- N, N'-diarylurea compound represented by the general formula (1) is N, N'-di- [3- (p-toluenesulfonyloxy) phenyl] urea, N, N'-di.
- the heat-sensitive recorder of the present invention is excellent in alcohol resistance, plasticizer resistance, and water plasticizer resistance.
- the numerical range represented by using “-” in this specification means a range including the numerical values before and after "-" as the lower limit value and the upper limit value.
- the latex in the present invention includes the state of a gel or a dry film formed by drying the dispersion medium.
- the present invention relates to a heat-sensitive recorder having, in this order, an undercoat layer containing hollow particles, an adhesive and an inorganic pigment I, and a heat-sensitive recording layer containing a leuco dye, a color developer and the inorganic pigment II on a support.
- a color developer the following general formula (1):
- R 2 represents a linear, branched or alicyclic alkyl group having 1 to 12 carbon atoms, an aralkyl group having 7 to 12 carbon atoms or an aryl group having 6 to 12 carbon atoms, and said aralkyl group.
- the group and the aryl group may be substituted with an alkyl group having 1 to 12 carbon atoms, an alkoxy group having 1 to 12 carbon atoms, an aryl group having 6 to 12 carbon atoms or a halogen atom, and a plurality of R 2s are the same. It may be present or different.
- a 1 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and a plurality of A 1s may be the same or different.) It is characterized by containing an N, N'-diarylurea-based compound and containing a pigment having an oil absorption of 130 ml / 100 g or less as an inorganic pigment II.
- the support in the present invention is not particularly limited in type, shape, size, etc., for example, high-quality paper (acidic paper, neutral paper), medium-quality paper, coated paper, art paper, cast-coated paper, glassin paper, etc.
- high-quality paper acidic paper, neutral paper
- medium-quality paper coated paper, art paper, cast-coated paper, glassin paper, etc.
- resin laminated paper polyolefin synthetic paper, synthetic fiber paper, non-woven fabric, synthetic resin film and the like
- various transparent supports and the like can be appropriately selected and used.
- the thickness of the support is not particularly limited, and is usually about 20 to 200 ⁇ m.
- the density of the support is not particularly limited, and is preferably about 0.60 to 0.85 g / cm 3 .
- the heat-sensitive recording body of the present invention has an undercoat layer between the support and the heat-sensitive recording layer.
- the undercoat layer contains hollow particles, an adhesive and an inorganic pigment I.
- the hollow particles are preferably made of an organic resin from the viewpoint of improving the cushioning property.
- the undercoat layer having high heat insulating properties by containing the hollow particles can prevent the diffusion of heat applied to the heat-sensitive recording layer and increase the sensitivity as a heat-sensitive recording body.
- Hollow particles made of organic resin can be divided into foamed type and non-foamed type depending on the difference in the manufacturing method.
- the effervescent type hollow particles generally have a larger average particle diameter and a higher hollow ratio than the non-effervescent type hollow particles. Therefore, the foamed type hollow particles can obtain better sensitivity and image quality than the non-foamed type hollow particles.
- the non-effervescent type hollow particles form a cavity inside by polymerizing the seed in a solution, polymerizing another resin so as to wrap the seed, and then swelling and dissolving the seed inside to remove it.
- Non-foaming type hollow particles having a relatively large average particle diameter can also be obtained by subjecting core-shell particles in which core particles having alkaline swelling property to a shell layer having no alkaline swelling property by alkaline swelling treatment. ..
- Effervescent type hollow particles can be produced by producing particles in which a volatile liquid is enclosed inside the resin, softening the resin by heating, and vaporizing and expanding the liquid inside the particles.
- Effervescent type hollow particles have a large hollow ratio and high heat insulating properties by heating and expanding the liquid inside in the manufacturing process, so that the sensitivity of the thermal recording body can be increased and the recording concentration can be improved. .. Improving the sensitivity is especially important when developing a halftone region in which the heat energy applied to the heat-sensitive recording layer is small. Further, if the heat-sensitive recording layer is formed through the undercoat layer having high heat insulating properties, the heat applied to the heat-sensitive recording layer is prevented from diffusing, so that the image uniformity is excellent and the image quality can be improved. Therefore, in the present embodiment, it is preferable to use foam-type hollow particles having excellent heat insulating properties of the undercoat layer.
- Resins that can be used for foam-type hollow particles include styrene-acrylic resin, polystyrene resin, acrylic resin, polyethylene resin, polypropylene resin, polyacetal resin, chlorinated polyether resin, polyvinyl chloride resin, and polyvinylidene chloride resin.
- acrylic resins for example, acrylic resins containing acrylonitrile as a constituent
- styrene resins for example, vinylidene chloride resins
- thermoplastic resins such as copolymer resins mainly composed of polyvinylidene chloride and acrylonitrile.
- propane, butane, isobutane, air and the like are generally used.
- acrylonitrile resin and a copolymer resin mainly composed of polyvinylidene chloride and acrylonitrile are preferable as the resin used for the hollow particles from the viewpoint of strength for maintaining the shape of the foamed particles.
- the maximum particle size of the hollow particles in the present invention is preferably 10 to 40 ⁇ m, more preferably 10 to 30 ⁇ m, and even more preferably 15 to 25 ⁇ m.
- the maximum particle size is also referred to as D100.
- the maximum particle size of the hollow particles is 10 ⁇ m or more, the cushioning property of the undercoat layer is improved, so that the adhesion of the heat-sensitive recording body to the thermal head at the time of printing is improved, and a high-quality heat-sensitive recording body can be obtained. ..
- This high image quality can bring about an improvement in the recording density in the halftone that develops the color with a lower energy that gives the maximum recording density (Dmax).
- the maximum particle diameter of the hollow particles is 40 ⁇ m or less, the smoothness of the undercoat layer is improved, so that the heat-sensitive recording layer provided via the undercoat layer can be made uniform, and the heat-sensitive recording in which whitening of the image is unlikely to occur.
- the body is obtained.
- the average particle size of the hollow particles in the present invention is preferably 4.0 to 15 ⁇ m, more preferably 7.5 to 15 ⁇ m.
- the average particle diameter is the diameter at which the volumes occupied by the particles on the large side and the particles on the small side are equal when divided into two by the particle diameter, that is, the median diameter which is the particle diameter of 50% by volume frequency. Yes, it is also called D50.
- the average particle size of the hollow particles is 4.0 ⁇ m or more, the cushioning property of the undercoat layer is improved, so that the adhesion of the heat-sensitive recording body to the thermal head at the time of printing is improved, and a high-quality heat-sensitive recording body is produced. can get.
- This high image quality can bring about an improvement in the recording density in the halftone that develops the color with a lower energy that gives the maximum recording density (Dmax).
- Dmax maximum recording density
- the average particle size of the hollow particles is 15 ⁇ m or less, the smoothness of the undercoat layer is improved, so that the heat-sensitive recording layer provided via the undercoat layer can be made uniform, and the heat-sensitive recording in which whitening of the image is unlikely to occur. The body is obtained.
- the maximum particle size (D100) and average particle size (D50) of the hollow particles can be measured by a laser diffraction type particle size distribution measuring device. Further, the particle diameter may be measured from the particle image (SEM image) using an electron microscope and shown as an average value of 10 particles.
- the ratio D100 / D50 of the maximum particle size (D100) and the average particle size (D50) of the hollow particles is an index indicating the degree of particle size distribution.
- the ratio D100 / D50 is preferably 1.8 to 3.0, more preferably 2.0 to 2.8.
- the D100 / D50 of the hollow particles is 1.8 or more, the hollow particles are sufficiently foamed, the maximum particle diameter is sufficiently large, the hollow ratio is high, and the heat insulating property of the undercoat layer can be improved.
- the D100 / D50 of the hollow particles is 3.0 or less, the sizes of the hollow particles are uniform, so that the smoothness of the undercoat layer is enhanced and white spots in the image can be suppressed.
- the volume% of the hollow particles having a particle diameter of 2.0 ⁇ m or less is preferably 1% or less. Further, the hollow particles having a particle diameter of 2.0 ⁇ m or less preferably have a volume% of 0.5%, and more preferably not contained. Hollow particles having a particle diameter of 2 ⁇ m or less are considered to have an extremely small contribution to heat insulating properties because the particle diameter is too small to have a sufficient hollow region. By setting the volume% of the hollow particles having a particle diameter of 2 ⁇ m or less in the undercoat layer to 1% or less, the recording density, the image quality, and the like can be improved.
- the hollow particles preferably have a hollow ratio of 80 to 98%, more preferably 90 to 98%.
- the hollow ratio of the hollow particles is 80% or more, high heat insulating properties can be imparted to the undercoat layer containing the hollow particles.
- the hollow ratio of the hollow particles is 98% or less, the hollow particles that do not collapse even when the undercoat layer is formed can be obtained by improving the strength of the film that encloses the hollow portion.
- the hollow ratio of the hollow particles is obtained by measuring the true specific gravity by the IPA method and using the true specific gravity value as follows.
- Sample pretreatment ⁇ The sample is dried at 60 ° C. for a whole day and night to prepare a sample.
- IPA Isopropyl alcohol
- Measurement method The volumetric flask is precisely weighed (W1). -Put about 0.5 g of the dried sample in a measuring flask and weigh it precisely (W2). -Add about 50 mg of IPA and shake thoroughly to completely remove the air outside the capsule. ⁇ Add IPA up to the marked line and evaluate it carefully (W3).
- the hollow ratio is also a value obtained by the following equation (d 3 / D 3 ) ⁇ 100.
- d indicates the inner diameter of the hollow particle
- D indicates the outer diameter of the hollow particle.
- the content ratio in the undercoat layer can be reduced.
- the content ratio of the hollow particles is preferably 3 to 40% by mass, more preferably 5 to 35% by mass, based on the total solid content of the undercoat layer.
- the content ratio of the hollow particles is 3% by mass or more, the heat insulating property of the undercoat layer can be improved.
- the content ratio of the hollow particles is 40% by mass or less, problems are less likely to occur in terms of coatability and the like, a uniform undercoat layer can be easily formed, and the recording concentration can be improved.
- the strength of the coating film of the undercoat layer can be increased.
- the adhesive examples include polyvinyl alcohol and its derivatives, starch and its derivatives, hydroxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, methyl cellulose, cellulose derivatives such as ethyl cellulose, sodium polyacrylic acid, polyvinylpyrrolidone, and acrylamide-acrylic acid esters.
- Water-soluble polymer materials such as polymers, acrylamide-acrylic acid ester-methacrylic acid ester copolymers, styrene-maleic anhydride copolymers, isobutylene-maleic anhydride copolymers, casein, gelatin and derivatives thereof,
- emulsions such as polyvinyl acetate, polyurethane, polyacrylic acid, polyacrylic acid ester, vinyl chloride-vinyl acetate copolymer, polybutyl methacrylate, ethylene-vinyl acetate copolymer, or styrene-butadiene copolymer, styrene.
- Examples thereof include latex of a water-insoluble polymer such as a butadiene-acrylic copolymer.
- an adhesive containing latex it is preferable to use an adhesive containing latex.
- the content ratio of the adhesive can be selected from a wide range, but generally, about 20 to 70% by mass, more preferably about 25 to 60% by mass, based on the total solid content of the undercoat layer.
- the glass transition temperature (Tg) of the adhesive is not particularly limited, but is preferably ⁇ 10 ° C. or lower.
- Tg glass transition temperature
- the glass transition temperature is more preferably ⁇ 30 ° C. or lower because the image quality can be further improved in the low energy region.
- the temperature is ⁇ 50 ° C. or lower, stickiness occurs, which is not preferable. Therefore, ⁇ 40 ° C. or higher is preferable.
- the undercoat layer in the present invention contains the inorganic pigment I.
- the oil absorption of the inorganic pigment I is preferably 130 ml / 100 g or less, more preferably 125 ml / 100 g or less, and further preferably 110 ml / 100 g or less, from the viewpoint of increasing the recorded concentration and improving the water plasticizer resistance and alcohol resistance. preferable.
- 50 ml / 100 g or more is preferable, and 80 ml / 100 g or more is more preferable.
- the oil absorption amount is a value obtained according to the method of JIS K 5101.
- the inorganic pigment I various kinds can be used, but calcined kaolin, clay and the like are preferable.
- the content ratio of the inorganic pigment I is preferably 60% by mass or less, more preferably 50% by mass or less, based on the total solid content of the undercoat layer, from the viewpoint of improving the water plasticizer resistance and the alcohol resistance.
- 20% by mass or more, more preferably 25% by mass or more, of the total solid content of the undercoat layer from the viewpoint of effectively reducing printing problems such as head residue generation and sticking, 20% by mass or more, more preferably 25% by mass or more, of the total solid content of the undercoat layer.
- the undercoat layer is, for example, coated with a paint for an undercoat layer prepared by mixing hollow particles, an adhesive and an inorganic pigment I, and if necessary, an auxiliary agent, etc. using water as a medium, and then dried and placed on a support. It is formed.
- the amount of the paint for the undercoat layer applied is not particularly limited, but is preferably about 2 to 20 g / m 2 in terms of dry mass, and more preferably about 2 to 12 g / m 2 .
- the heat-sensitive recording layer in the heat-sensitive recording body of the present invention may contain various known colorless or light-colored leuco dyes. Specific examples of such leuco dyes are given below.
- the leuco dye examples include, for example, 3,3-bis (p-dimethylaminophenyl) -6-dimethylaminophthalide and 3- (4-diethylamino-2-methylphenyl) -3- (4-dimethylamino).
- Blue color dyes such as phenyl) -6-dimethylaminophthalide and fluorane, 3- (N-ethyl-N-p-tolyl) amino-7-N-methylanilinofluorane, 3-diethylamino-7-ani Green color dyes such as linofluolane, 3-diethylamino-7-dibenzylaminofluorane, rhodamine B-anilinolactam, 3,6-bis (diethylamino) fluoren- ⁇ -anilinolactam, 3-cyclohexylamino- Red-coloring dyes such as 6-chlorofluorane, 3-diethylamino-6-methyl-7-chlorofluorane, 3-diethylamino-7-chlorofluorane, 3- (N-ethyl-N-isoamyl) amino-6 -Methyl-7-anilinofluorane, 3- (N-methyl-N
- the content ratio of the leuco dye is not particularly limited, and is preferably about 3 to 30% by mass, more preferably about 5 to 25% by mass, and further about 7 to 20% by mass, based on the total solid content of the heat-sensitive recording layer. preferable.
- the content ratio of the leuco dye is not particularly limited, and is preferably about 3 to 30% by mass, more preferably about 5 to 25% by mass, and further about 7 to 20% by mass, based on the total solid content of the heat-sensitive recording layer. preferable.
- the N, N'-diarylurea compound represented by the above general formula (1) is contained as a color developer. Thereby, excellent alcohol resistance, plasticizer resistance, water plasticizer resistance and the like can be exhibited.
- the alkyl group having 1 to 12 carbon atoms of R 2 may be linear, branched chain or alicyclic, preferably an alkyl group having 1 to 6 carbon atoms, and more preferably 1 to 6 carbon atoms. It is an alkyl group of 3.
- Examples of the alkyl group having 1 to 12 carbon atoms include a methyl group, an ethyl group, an n-propyl group, an i-propyl group, an n-butyl group, an i-butyl group, a t-butyl group, a cyclopentyl group and a hexyl group.
- alkyl group here also includes an alkyl moiety of an alkoxy group having 1 to 12 carbon atoms.
- the aralkyl group means an arylalkyl group.
- Examples of the aralkyl group having 7 to 12 carbon atoms include a benzyl group, a 1-phenylethyl group, a 2-phenylethyl group and a 3-phenylpropyl group.
- the aryl group means a monocyclic or polycyclic group composed of a 5- or 6-membered aromatic hydrocarbon ring.
- Examples of the aryl group having 6 to 12 carbon atoms include a phenyl group, a 1-naphthyl group, a 2-naphthyl group and the like.
- the aryl group here also includes an aryl portion of an aralkyl group.
- halogen atom examples include fluorine, chlorine, bromine and iodine.
- the substitution positions of a plurality of R 2 ⁇ SO 3 ⁇ may be the same or different.
- the substitution position is preferably 3-position, 4-position or 5-position, and more preferably 3-position.
- the number of substituents is not particularly limited, and is, for example, 1 to 4.
- the alkyl group having 1 to 4 carbon atoms of A 1 may be linear or branched, and may be, for example, a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, an isobutyl group or sec-butyl. Groups, t-butyl groups and the like can be mentioned.
- the replacement positions of the plurality of A 1s may be the same replacement position or different.
- the substitution positions are preferably 3-positions, 4-positions or 5-positions.
- the N, N'-diarylurea-based compound represented by the general formula (1) is not particularly limited, but is N, N'-di- [3- (p-toluenesulfonyloxy) phenyl] urea, N, N.
- the content of the N, N'-diarylurea compound is not particularly limited and may be adjusted according to the leuco dye used. Generally, 0.5 part by mass or more is preferable with respect to 1 part by mass of the leuco dye. 0.8 parts by mass or more is more preferable, 1 part by mass or more is further preferable, 1.2 parts by mass or more is further preferable, and 1.5 parts by mass or more is particularly preferable.
- the content of the N, N'-diarylurea compound is preferably 10 parts by mass or less, more preferably 5 parts by mass or less, still more preferably 4 parts by mass or less, based on 1 part by mass of the leuco dye. 5 parts by mass or less is particularly preferable. Recording performance can be improved by setting the content to 0.5 parts by mass or more. On the other hand, when the content is 10 parts by mass or less, it is possible to effectively suppress the background fog in a high temperature environment.
- the heat-sensitive recording layer in the present invention further serves as a second color developer, and further comprises 4,4'-bis [(4-methyl-3-phenoxycarbonylaminophenyl) ureido] diphenyl represented by the above general formula (2).
- Sulfone, 4,4'-bis [(2-methyl-5-phenoxycarbonylaminophenyl) ureido] diphenyl sulfone, 4- (2-methyl-3-phenoxycarbonylaminophenyl) ureido-4'-(4-methyl-) Selected from the group consisting of urea urethane compounds such as 5-phenoxycarbonylaminophenyl) ureidodiphenylsulfone, diphenylsulfone cross-linked compounds represented by the above general formula (3), and 4,4'-bis (3-tosyl ureido) diphenylmethane.
- the content of the second color developer is preferably about 0.2 to 3 parts by mass with respect to 1 part by mass of the leuco dye.
- the content of the second color developer is preferably about 0.2 to 0.5 part by mass with respect to 1 part by mass of the N, N'-diarylurea compound as the first color developer.
- color developer may be contained as long as the effect of the present invention is not impaired.
- specific examples of other developeres include, for example, 4-tert-butylphenol, 4-acetylphenol, 4-tert-octylphenol, 4,4'-sec-butylidenediphenol, 4-phenylphenol, 4,4'.
- the content ratio of the other developer is not particularly limited, but is preferably 0.2 parts by mass or less with respect to 1 part by mass of the N, N'-diarylurea compound as the first color developer. , 0.1 part by mass or less is more preferable.
- the heat-sensitive recording layer in the present invention contains a pigment having an oil absorption of 130 ml / 100 g or less as the inorganic pigment II.
- the oil absorption of the inorganic pigment II is preferably 125 ml / 100 g or less, more preferably 100 ml / 100 g or less, further preferably 60 ml / 100 g or less, particularly preferably 50 ml / 100 g or less, and most preferably 45 ml / 100 g or less.
- the heat-sensitive recording layer in the present invention may contain a pigment having an oil absorption amount of more than 130 ml / 100 g as long as the effect of the present invention is not impaired.
- the content of the pigment having an oil absorption of more than 130 ml / 100 g is preferably 0.5 parts by mass or less, more preferably 0.3 parts by mass or less, and 0, with respect to 1 part by mass of the pigment having an oil absorption of 130 ml / 100 g or less. .1 part by mass or less is more preferable. It is particularly preferable that a pigment having an oil absorption amount of more than 130 ml / 100 g is not contained.
- the oil absorption amount is a value obtained according to the method of JIS K 5101.
- inorganic pigments II can be used, and specific examples thereof include calcium carbonate such as light calcium carbonate, clay such as aluminum hydroxide and kaolin, and inorganic pigments such as talc. Among these, it is preferable that the inorganic pigment II is at least one selected from the group consisting of calcium carbonate, aluminum hydroxide and clay.
- the type of the inorganic pigment II may be different from or the same as that of the inorganic pigment I.
- the content ratio of the inorganic pigment II can be selected from a wide range, but is preferably 10 to 50% by mass, more preferably 10 to 40% by mass, still more preferably 15 to 35% by mass, based on the total solid content of the heat-sensitive recording layer. ..
- the heat-sensitive recording layer can further contain a storage stability improving agent mainly in order to further enhance the storage stability of the color development image.
- a storage improving agent examples include 1,1,3-tris (2-methyl-4-hydroxy-5-cyclohexylphenyl) butane and 1,1,3-tris (2-methyl-4-hydroxy).
- the amount used may be an amount effective for improving the storage stability, and is usually preferably about 1 to 25% by mass of the total solid content of the heat-sensitive recording layer. About 5 to 20% by mass is more preferable.
- a sensitizer can also be contained in the heat-sensitive recording layer in the present invention. This makes it possible to increase the recording sensitivity.
- the sensitizer include stearate amide, methoxycarbonyl-N-stearate benzyldo, N-benzoyl stearate amide, N-eicosanoic acid amide, ethylene bisstearic acid amide, behenic acid amide, methylene bisstearic acid amide, and the like.
- N-Methylol stearate amide dibenzyl terephthalate, dimethyl terephthalate, dioctyl terephthalate, diphenyl sulfone, benzyl p-benzyloxybenzoate, phenyl 1-hydroxy-2-naphthoate, 2-naphthylbenzyl ether, m-terphenyl , P-benzylbiphenyl, oxalic acid di-p-chlorobenzyl ester, oxalic acid di-p-methylbenzyl ester, oxalic acid dibenzyl ester, p-tolylbiphenyl ether, di (p-methoxyphenoxyethyl) ether, 1, 2-di (3-methylphenoxy) ethane, 1,2-di (4-methylphenoxy) ethane, 1,2-di (4-methoxyphenoxy) ethane, 1,2-di (4-chlor
- 1,2-di (3-methylphenoxy) ethane is preferable from the viewpoint of obtaining a sensitizing effect without deteriorating the water plasticizer resistance and alcohol resistance.
- the content ratio of the sensitizer may be an amount effective for sensitization, and is usually preferably 2 to 25% by mass, more preferably 5 to 20% by mass, based on the total solid content of the heat-sensitive recording layer. 5 to 15% by mass is more preferable.
- Adhesives may be used as other component materials constituting the heat-sensitive recording layer, and if necessary, auxiliary agents such as cross-linking agents, waxes, metal soaps, water-resistant agents, dispersants, colored dyes, and fluorescent dyes may be used. can.
- the adhesive examples include polyvinyl alcohol and its derivatives, starch and its derivatives, hydroxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, methyl cellulose, cellulose derivatives such as ethyl cellulose, sodium polyacrylic acid, polyvinylpyrrolidone, and acrylamide-acrylic acid esters.
- Water-soluble polymer materials such as polymers, acrylamide-acrylic acid ester-methacrylic acid ester copolymers, styrene-maleic anhydride copolymers, isobutylene-maleic anhydride copolymers, casein, gelatin and derivatives thereof,
- emulsions such as polyvinyl acetate, polyurethane, polyacrylic acid, polyacrylic acid ester, vinyl chloride-vinyl acetate copolymer, polybutyl methacrylate, ethylene-vinyl acetate copolymer, or styrene-butadiene copolymer, styrene.
- the content ratio of the adhesive can be selected from a wide range, but in general, it is preferably about 5 to 30% by mass, more preferably about 10 to 20% by mass, based on the total solid content of the heat-sensitive recording layer.
- the water resistance of the heat-sensitive recording layer can be improved.
- the cross-linking agent include aldehyde compounds such as glioxal, polyamine compounds such as polyethyleneimine, epoxy compounds, polyamide resins, melamine resins, glyoxyphosphates, dimethylolurea compounds, aziridine compounds, blocked isocyanate compounds; ammonium persulfate.
- Inorganic compounds such as ferric chloride, magnesium chloride, sodium tetraborate, potassium tetraborate; examples thereof include boric acid, borate triester, borane polymer, hydrazide compound, glyoxylate and the like. These may be used individually by 1 type, or may be used in combination of 2 or more type.
- the amount of the cross-linking agent used is preferably about 1 to 5% by mass based on the total solid content of the heat-sensitive recording layer.
- the heat-sensitive recording layer uses, for example, water as a dispersion medium, and a leuco dye and a color-developing agent, respectively, together with a sensitizer or a storage improving agent as necessary, or separately, in a ball mill, a co-ball mill, an attritor, a vertical type and a horizontal type.
- a sensitizer or a storage improving agent as necessary, or separately, in a ball mill, a co-ball mill, an attritor, a vertical type and a horizontal type.
- Disperse with water-soluble synthetic polymer compounds such as polyacrylamide, polyvinylpyrrolidone, polyvinyl alcohol, methylcellulose, styrene-maleic anhydride copolymer salt, and other surfactants by various stirring and wet crushers such as sand mills.
- the inorganic pigment II is mixed with the dispersion obtained by refining the powder so that the average particle size is 2 ⁇ m or less, and if necessary, an adhesive, an auxiliary agent, etc. are mixed.
- the prepared heat-sensitive recording layer paint After applying the prepared heat-sensitive recording layer paint, it is dried and formed on the undercoat layer.
- the coating amount of the heat-sensitive recording layer is not particularly limited, and the coating amount after drying is preferably about 1 to 12 g / m 2 , more preferably 2 to 10 g / m 2 , and even more preferably 2.5 to 8 g / m 2 . 3 to 5.5 g / m 2 is particularly preferable.
- the heat-sensitive recording layer can be formed by dividing it into two or more layers as needed, and the composition and the coating amount of each layer may be the same or different.
- a protective layer may be provided on the heat-sensitive recording layer, if necessary.
- the protective layer preferably contains a pigment and an adhesive.
- the protective layer preferably contains a lubricant such as polyolefin wax or zinc stearate for the purpose of preventing sticking to the thermal head, and may also contain an ultraviolet absorber. Further, by providing a protective layer having a gloss, it is possible to increase the added value of the product.
- the pigment contained in the protective layer is not particularly limited, and is, for example, amorphous silica, kaolin, clay, light calcium carbonate, heavy calcium carbonate, calcined kaolin, titanium oxide, magnesium carbonate, aluminum hydroxide, colloidal silica, and synthetic.
- examples thereof include inorganic pigments such as layered mica, and plastic pigments such as urea-formalin resin filler.
- the adhesive contained in the protective layer is not particularly limited, and a water-soluble or water-dispersible water-based adhesive can be used.
- the adhesive can be appropriately selected from those that can be used for the heat-sensitive recording layer.
- various modified polyvinyl alcohols such as acetacetyl-modified polyvinyl alcohol, carboxy-modified polyvinyl alcohol, and diacetone-modified polyvinyl alcohol are more preferably used.
- the protective layer is formed on the heat-sensitive recording layer by, for example, applying a protective layer paint prepared by using water as a dispersion medium and mixing a pigment, an adhesive, and if necessary, an auxiliary agent, and the like, and then drying the protective layer. ..
- the amount of the coating material for the protective layer is not particularly limited, and the dry mass is preferably about 0.3 to 15 g / m 2 , more preferably about 0.3 to 10 g / m 2 , and more preferably 0.5 to 8 g / m 2 .
- the degree is still more preferable, about 1 to 8 g / m 2 is particularly preferable, and about 1 to 5 g / m 2 is even more preferable.
- the protective layer can be divided into two or more layers as needed, and the composition and coating amount of each layer may be the same or different.
- an adhesive layer on at least one surface of the support.
- an adhesive paper, a re-wet adhesive paper, a delayed tack paper, or the like can be obtained by applying a coating process on one surface with an adhesive, a re-wet adhesive, a delayed tack type adhesive, or the like.
- functions as thermal transfer paper, inkjet recording paper, carbonless copy paper, electrostatic recording paper, zeography paper, etc. are given to this, and double-sided recording is performed. It can also be a recording paper that can be used.
- a back layer can be provided to suppress the penetration of oil and the plasticizer from the back surface of the heat-sensitive recording body, to control the curl, and to prevent the charge. It is also possible to obtain a linerless label that does not require a release paper by applying a release layer containing silicone on the protective layer and applying an adhesive on one surface.
- the thermal recording body can be manufactured by forming each of the above layers on the support.
- Examples of the method for forming each of the above layers on the support include an air knife method, a blade method, a gravure method, a roll coater method, a spray method, a dip method, a bar method, a curtain method, a slot die method, a slide die method, and an extrusion method. Any of the known coating methods of is used. Further, each paint may be applied one layer at a time and dried to form each layer, or the same paint may be applied in two or more layers. Further, simultaneous multi-layer coating may be performed in which two or more layers are simultaneously coated. In addition, smoothing can be performed using a known method such as a super calendar or a soft calendar in an arbitrary process after each layer has been formed or all layers have been formed.
- the present invention will be described in more detail with reference to Examples, but the present invention is not limited thereto.
- “parts” and “%” indicate “parts by mass” and “% by mass”, respectively.
- the particle diameters such as the average particle diameter and the maximum particle diameter were measured by a laser diffraction type particle size distribution measuring device SALD2200 (manufactured by Shimadzu Corporation).
- SALD2200 laser diffraction type particle size distribution measuring device
- the average particle diameter is the median diameter (D50).
- the hollow particles used in Examples and Comparative Examples are as follows. Hollow particles A: average particle diameter (D50) 5.0 ⁇ m, maximum particle diameter (D100) 13.5 ⁇ m, hollow ratio 90%, proportion of particles of 2 ⁇ m or less 0.2% by volume, solid content concentration 15.0%, foaming Type hollow particles B: average particle diameter (D50) 11 ⁇ m, maximum particle diameter (D100) 23 ⁇ m, hollow ratio 93%, proportion of particles of 2 ⁇ m or less 0% by volume, solid content concentration 15.0%, foamed type hollow particles C: Product name "Low Pake SN-1055" (manufactured by Dow Chemical Co., Ltd.), average particle size (D50) 1.0 ⁇ m, maximum particle size (D100) 1.8 ⁇ m, hollow ratio 55%, proportion of particles of 2 ⁇ m or less 100% by volume
- the average particle size (D50) and the maximum particle size (D100) of each non-foaming type hollow particle having a solid content concentration of 26.5% are determined by using a laser d
- Latex A Styrene-butadiene copolymer latex developed product (Tg: -35 ° C, particle size 300 nm, solid content concentration 48%)
- Latex B Styrene-butadiene copolymer latex developed product (Tg: -10 ° C, particle size 190 nm, solid content concentration 48%)
- Latex C Styrene-butadiene copolymer latex (trade name L-1571, manufactured by Asahi Kasei Corporation, Tg: -3 ° C, particle size 190 nm, solid content concentration 48%)
- the inorganic pigment II used in Examples and Comparative Examples is as follows.
- Aluminum hydroxide Product name: Reginalite H-42, manufactured by Showa Denko, oil absorption 43 ml / 100 g
- Calcium carbonate Product name: Brilliant-15, manufactured by Shiraishi Kogyo Co., Ltd., oil absorption 56 ml / 100 g
- Clay Product name: HYDRAGLOSS90, manufactured by KaMinLLC, oil absorption 46 ml / 100 g
- Amorphous silica Product name: Nip seal E743, manufactured by Tosoh Silica, oil absorption 160 ml / 100 g
- Example 1 Preparation of paint for undercoat layer 100 parts of hollow particles A, 38 parts of calcined kaolin (trade name: Ansilex 93, manufactured by BASF, oil absorption 105 ml / 100 g) as inorganic pigment I, 79.2 parts of latex A, oxidized starch 32 parts of 25% solution, 1.1 parts of carboxymethyl cellulose (trade name: Cellogen AG gum, manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd.), and 100 parts of water were mixed and stirred to obtain a paint for an undercoat layer.
- calcined kaolin trade name: Ansilex 93, manufactured by BASF, oil absorption 105 ml / 100 g
- inorganic pigment I 79.2 parts of latex A
- oxidized starch 32 parts of 25% solution 1.1 parts of carboxymethyl cellulose (trade name: Cellogen AG gum, manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd.)
- color developer dispersion liquid (B liquid) 10 parts of N, N'-di- [3- (p-toluenesulfonyloxy) phenyl] urea, polyvinyl alcohol (polymerization degree 500, saponification degree 88%) % 40 parts of aqueous solution and 20 parts of water are mixed and pulverized using a sand mill (Sand Grinder manufactured by IMEX) until the average particle size becomes 1.0 ⁇ m to obtain a developer dispersion liquid (solution B). rice field.
- Sand Grinder manufactured by IMEX sand mill
- sensitizer dispersion liquid (C liquid) 1,2-di (3-methylphenoxy) ethane (trade name: KS-232, manufactured by Sanko Co., Ltd.) 40 parts, polyvinyl alcohol (polymerization degree 500, saponification degree 88) %) 40 parts of 10% aqueous solution and 20 parts of water are mixed and pulverized using a sand mill (sand grinder manufactured by IMEX) until the average particle size becomes 1.0 ⁇ m, and the sensitizer dispersion liquid (C). Liquid) was obtained.
- thermo recording body The amount of paint for the undercoat layer, paint for the thermal recording layer, and paint for the protective layer after drying is 4.5 g / m on one side of high-quality paper with a basis weight of 60 g / m 2 . After applying and drying to m 2 , 3.5 g / m 2 , 2.5 g / m 2 , the undercoat layer, the thermal recording layer, and the protective layer are sequentially formed, and then the surface is smoothed with a super calendar. A thermal recorder was obtained.
- Example 2 In the preparation of the paint for the heat-sensitive recording layer of Example 1, a heat-sensitive recorder was obtained in the same manner as in Example 1 except that calcium carbonate (trade name: Brilliant-15, manufactured by Shiraishi Kogyo Co., Ltd.) was used instead of aluminum hydroxide. rice field.
- calcium carbonate trade name: Brilliant-15, manufactured by Shiraishi Kogyo Co., Ltd.
- Example 3 In the preparation of the paint for the heat-sensitive recording layer of Example 1, a heat-sensitive recording body was obtained in the same manner as in Example 1 except that clay (trade name: HYDRAGLOSS90, manufactured by KaMin LLC) was used instead of aluminum hydroxide.
- clay trade name: HYDRAGLOSS90, manufactured by KaMin LLC
- Example 4 In the preparation of the undercoat layer paint of Example 1, the amount of hollow particles A was changed to 46.7 parts instead of 100 parts, the amount of calcined kaolin was changed to 46.0 parts instead of 38.0 parts, and the amount of water was changed.
- a heat-sensitive recorder was obtained in the same manner as in Example 1 except that 145 parts were used instead of 100 parts.
- Example 5 In the preparation of the paint for the undercoat layer of Example 1, a heat-sensitive recorder was obtained in the same manner as in Example 1 except that Latex B was used instead of Latex A.
- Example 6 In the preparation of the paint for the undercoat layer of Example 1, a heat-sensitive recorder was obtained in the same manner as in Example 1 except that Latex C was used instead of Latex A.
- Example 7 In the preparation of the paint for the undercoat layer of Example 1, a heat-sensitive recorder was obtained in the same manner as in Example 1 except that the hollow particles B were used instead of the hollow particles A.
- Example 8 In the preparation of the paint for the heat-sensitive recording layer of Example 1, the amount of liquid C was changed to 45.5 parts instead of 22.7 parts, the amount of aluminum hydroxide was changed to 22 parts instead of 32 parts, and the amount of water was changed to 22 parts.
- a heat-sensitive recorder was obtained in the same manner as in Example 1 except that 190 parts were used instead of 200 parts.
- Example 9 Preparation of color developer dispersion liquid (D liquid) 40 parts of 4,4'-bis (3-tosyl ureido) diphenylmethane, 40 parts of 10% aqueous solution of polyvinyl alcohol (polymerization degree 500, saponification degree 88%), and 20 parts of water are mixed. Then, using a sand mill (Sand Grinder manufactured by IMEX), the mixture was pulverized until the average particle size became 1.0 ⁇ m to obtain a developer dispersion liquid (Liquid D).
- Example 11 Preparation of color developer dispersion liquid (F liquid) 40 parts of diphenyl sulfone crosslinked compound represented by the above general formula (3), 40 parts of 10% aqueous solution of polyvinyl alcohol (polymerization degree 500, saponification degree 88%), and water 20. The portions were mixed and pulverized using a sand mill (Sand Grinder manufactured by IMEX) until the average particle size became 1.0 ⁇ m to obtain a developer dispersion liquid (F liquid).
- Sand Grinder manufactured by IMEX sand mill
- Example 12 In the preparation of the paint for the heat-sensitive recording layer of Example 1, the amount of liquid C was changed to 0 parts instead of 22.7 parts, the amount of aluminum hydroxide was changed to 42 parts instead of 32 parts, and the amount of water was 200 parts.
- a heat-sensitive recorder was obtained in the same manner as in Example 1 except that the number of copies was 210.
- Example 13 In the preparation of the undercoat layer paint of Example 1, the amount of calcined kaolin was changed to 66 parts instead of 38 parts, 79.2 parts of latex A was replaced with 20.8 parts of latex C, and 100 parts of hollow particles A were used. A heat-sensitive recorder was obtained in the same manner as in Example 1 except that 56.6 parts of the hollow particles C were used instead of 100 parts and 175 parts were used instead of 100 parts of water.
- Example 14 In the preparation of the paint for the undercoat layer of Example 1, hollow particles C were used instead of hollow particles A, the amount of calcined kaolin was changed to 50 parts instead of 38 parts, and 79.2 parts of latex A was replaced with latex C.
- a paint for the undercoat layer was obtained in the same manner as in Example 1 except that the amount of the 25% solution of the oxidized starch was changed to 20 parts instead of 32 parts and the amount of water was changed to 130 parts instead of 100 parts. rice field.
- Example 1 In the preparation of the paint for the heat-sensitive recording layer of Example 1, the amount of the liquid A was changed to 36.7 parts instead of 31.8 parts, the amount of the liquid B was changed to 73.3 parts instead of 63.6 parts, and C. Replace the amount of liquid with 22.7 parts to 55 parts, replace the amount of 15% aqueous solution of fully saponified polyvinyl alcohol with 46.7 parts to 66.7 parts, and replace the amount of aluminum hydroxide with 32 parts. Same as Example 1 except that the number of parts is 27, and 10 parts of amorphous silica (trade name: Nipseal E-743, manufactured by Tosoh Silica Co., Ltd.) are added to change the amount of water to 140 parts instead of 200 parts. The paint for the heat-sensitive recording layer was obtained.
- amorphous silica trade name: Nipseal E-743, manufactured by Tosoh Silica Co., Ltd.
- the heat-sensitive recorder of Example 14 was obtained in the same manner as in Example 1 except that the paint for the undercoat layer and the paint for the heat-sensitive recording layer were used.
- Example 1 In the preparation of the paint for the heat-sensitive recording layer of Example 1, the heat-sensitive recording body was used in the same manner as in Example 1 except that amorphous silica (trade name: Nipseal E743, manufactured by Tosoh Silica Co., Ltd.) was used instead of aluminum hydroxide. Obtained.
- amorphous silica trade name: Nipseal E743, manufactured by Tosoh Silica Co., Ltd.
- the heat-sensitive recorder thus obtained was evaluated as follows. The results are as shown in Table 1.
- the heat-sensitive recorder of the present invention has high plasticizer resistance, water plasticizer resistance, and alcohol resistance, and the performance of the heat-sensitive recorder such that the blank paper portion does not develop color and the printed portion does not fade even when it comes into contact with alcohol. It fully meets the demand for improvement.
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Abstract
Description
項2:前記無機顔料Iの含有割合が下塗り層の全固形量のうち60質量%以下である、項1に記載の感熱記録体。
項3:前記無機顔料Iの吸油量が130ml/100g以下である、項1又は2に記載の感熱記録体。
項4:前記無機顔料IIが炭酸カルシウム、水酸化アルミニウム及びクレーからなる群より選ばれる少なくとも1種である、項1~3のいずれか1項に記載の感熱記録体。
項5:前記中空粒子の最大粒子径(D100)が10~40μmであり、平均粒子径(D50)が4.0~15μmであり、最大粒子径(D100)と平均粒子径(D50)との比D100/D50が1.8~3.0であり、粒子径2.0μm以下の体積%が1%以下である、項1~4のいずれか1項に記載の感熱記録体。
項6:前記中空粒子の中空率が80~98%である、項1~5のいずれか1項に記載の感熱記録体。
項7:前記下塗り層が-10℃以下のガラス転移温度を有する接着剤を含有する、項1~6のいずれか1項に記載の感熱記録体。
項8:前記感熱記録層が第2の顕色剤としてさらに下記一般式(2):
項9:前記第2の顕色剤の含有量がロイコ染料1質量部に対して0.2~3質量部である、項8に記載の感熱記録体。
項10:前記一般式(1)で表されるN,N’-ジアリール尿素系化合物がN,N’-ジ-[3-(p-トルエンスルホニルオキシ)フェニル]尿素、N,N’-ジ-[3-(o-トルエンスルホニルオキシ)フェニル]尿素、N,N’-ジ-[3-(ベンゼンスルホニルオキシ)フェニル]尿素、N,N’-ジ-[3-(メシチレンスルホニルオキシ)フェニル]尿素、N,N’-ジ-[3-(4-エチルベンゼンスルホニルオキシ)フェニル]尿素、N,N’-ジ-[3-(2-ナフタレンスルホニルオキシ)フェニル]尿素、N,N’-ジ-[3-(p-メトキシベンゼンスルホニルオキシ)フェニル]尿素、N,N’-ジ-[3-(ベンジルスルホニルオキシ)フェニル]尿素、N,N’-ジ-[3-(エタンスルホニルオキシ)フェニル]尿素、N,N’-ジ-[3-(p-トルエンスルホニルオキシ)-4-メチル-フェニル]尿素、N,N’-ジ-[4-(p-トルエンスルホニルオキシ)フェニル]尿素、N,N’-ジ-[4-(ベンゼンスルホニルオキシ)フェニル]尿素、N,N’-ジ-[4-(エタンスルホニルオキシ)フェニル]尿素、及びN,N’-ジ-[2-(p-トルエンスルホニルオキシ)]フェニル尿素からなる群より選ばれる少なくとも1種である、項1~9のいずれか1項に記載の感熱記録体。
項11:前記支持体の少なくとも一方面に粘着層を有する、項1~10のいずれか1項に記載の感熱記録体。
本発明における支持体は、種類、形状、寸法等に格別の限定はなく、例えば、上質紙(酸性紙、中性紙)、中質紙、コート紙、アート紙、キャストコート紙、グラシン紙、樹脂ラミネート紙、ポリオレフィン系合成紙、合成繊維紙、不織布、合成樹脂フィルム等の他、各種透明支持体等の中から適宜選択して使用することができる。支持体の厚みは特に制限されず、通常、20~200μm程度である。また、支持体の密度は特に制限されず、0.60~0.85g/cm3程度が好ましい。
本発明の感熱記録体は、支持体と感熱記録層との間に下塗り層を有する。下塗り層は、中空粒子、接着剤及び無機顔料Iを含有している。
中空粒子は、クッション性を向上する観点から有機樹脂からなることが好ましい。中空粒子を含有することによって高い断熱性を有する下塗り層は、感熱記録層に加えられた熱の拡散を防ぎ、感熱記録体としての感度を高めることができる。
(1)サンプルの前処理
・サンプルを60℃で一昼夜乾燥してサンプルとする。
(2)試薬
・イソプロピルアルコール(IPA:試薬一級)
(3)測定法
・メスフラスコを精秤する(W1)。
・メスフラスコに乾燥済サンプルを約0.5g取り精秤する(W2)。
・IPAを約50mg加え、十分に振とうして完全にカプセル外の空気を除去する。
・IPAを標線まで加えて精評する(W3)。
・ブランクとしてメスフラスコにIPAのみを標線まで加え精評する(W4)。
(4)真比重の算出
真比重={(W2-W1)×((W4-W1)/100)}/{(W4-W1)-(W3-W2)}
(5)中空率の算出
中空率(%)={1-1/(1.1/真比重)}×100
接着剤としては、例えば、ポリビニルアルコール及びその誘導体、澱粉及びその誘導体、ヒドロキシメチルセルロース、ヒドロキシエチルセルロース、ヒドロキシプロピルセルロース、メチルセルロース、エチルセルロース等のセルロース誘導体、ポリアクリル酸ソーダ、ポリビニルピロリドン、アクリルアミド-アクリル酸エステル共重合体、アクリルアミド-アクリル酸エステル-メタアクリル酸エステル共重合体、スチレン-無水マレイン酸共重合体、イソブチレン-無水マレイン酸共重合体、カゼイン、ゼラチン及びそれらの誘導体等の水溶性高分子材料、並びにポリ酢酸ビニル、ポリウレタン、ポリアクリル酸、ポリアクリル酸エステル、塩化ビニル-酢酸ビニル共重合体、ポリブチルメタクリレート、エチレン-酢酸ビニル共重合体等のエマルジョン、又はスチレン-ブタジエン系共重合体、スチレン-ブタジエン-アクリル系共重合体等の水不溶性重合体のラテックス等を挙げることができる。これらの中でも、ラテックスを含有する接着剤を用いることが好ましい。接着剤の含有割合は、広い範囲から選択できるが、一般には下塗り層の全固形量のうち、20~70質量%程度が好ましく、25~60質量%程度がより好ましい。
本発明における下塗り層は、無機顔料Iを含有している。無機顔料Iの吸油量は、記録濃度を高めて、耐水可塑剤性と耐アルコール性とを向上させる観点から、130ml/100g以下が好ましく、125ml/100g以下がより好ましく、110ml/100g以下がさらに好ましい。一方、ヘッドカスの発生、スティッキング等の印字障害を効果的に減らす観点から、50ml/100g以上が好ましく、80ml/100g以上がより好ましい。ここで、吸油量は、JIS K 5101の方法に従い、求められる値である。
(ロイコ染料)
本発明の感熱記録体における感熱記録層には、無色又は淡色の各種公知のロイコ染料を含有させることができる。そのようなロイコ染料の具体例を以下に挙げる。
本発明では顕色剤として、上記一般式(1)で表されるN,N’-ジアリール尿素系化合物を含有する。これにより、優れた耐アルコール性、耐可塑剤性、耐水可塑剤性等を発揮することができる。
本発明における感熱記録層は、無機顔料IIとして吸油量が130ml/100g以下の顔料を含有している。無機顔料IIの吸油量は、125ml/100g以下が好ましく、100ml/100g以下がより好ましく、60ml/100g以下がさらに好ましく、50ml/100g以下が特に好ましく、45ml/100g以下が最も好ましい。これにより、耐アルコール性、耐可塑剤性、耐水可塑剤性を著しく高めることができる。一方、ヘッドカスの発生、スティッキング等の印字障害を効果的に減らす観点から、30ml/100g以上が好ましい。本発明における感熱記録層は、本発明の効果を損なわない限り、吸油量が130ml/100gを超える顔料を含有してもよい。吸油量が130ml/100gを超える顔料の含有量は、吸油量が130ml/100g以下の顔料1質量部に対して、0.5質量部以下が好ましく、0.3質量部以下がより好ましく、0.1質量部以下がさらに好ましい。吸油量が130ml/100gを超える顔料は、含有されないことが特に好ましい。ここで、吸油量は、JIS K 5101の方法に従い、求められる値である。
感熱記録体では、感熱記録層上に必要に応じて保護層を備えることもできる。保護層は、顔料及び接着剤を含有することが好ましい。さらに保護層には、サーマルヘッドに対するスティッキングを防止する目的で、ポリオレフィンワックス、ステアリン酸亜鉛のような滑剤を含有させることが好ましく、紫外線吸収剤を含有させることもできる。また、光沢を有する保護層を設けることにより、製品の付加価値を高めることもできる。
本発明では、支持体の少なくとも一方面に粘着層を有することが好ましい。これにより、感熱記録体の付加価値を高めることができる。粘着層としては、例えば、一方面に粘着剤、再湿接着剤、ディレードタック型の粘着剤等による塗布加工を施すことにより粘着紙、再湿接着紙、ディレードタック紙等とすることができる。また、支持体の感熱記録層とは逆側の面を利用して、これに熱転写用紙、インクジェット記録用紙、ノーカーボン用紙、静電記録用紙、ゼオグラフィー用紙等としての機能を付与し、両面記録が可能な記録紙とすることもできる。もちろん、両面感熱記録体とすることもできる。また、感熱記録体裏面からの油及び可塑剤の浸透を抑制したり、カールコントロールしたり、帯電防止したりするためにバック層を設けることもできる。保護層上にシリコーンを含有した剥離層を塗布加工し、一方面に粘着剤を塗布加工することにより、剥離紙を必要としないライナーレスラベルとすることも可能である。
感熱記録体は、支持体上に上記各層を形成することにより製造することができる。支持体上に上記各層を形成する方法としては、エアナイフ法、ブレード法、グラビア法、ロールコーター法、スプレー法、ディップ法、バー法、カーテン法、スロットダイ法、スライドダイ法、エクストルージョン法等の既知の塗布方法のいずれを利用してもよい。また、各塗料は1層ずつ塗布及び乾燥して各層を形成してもよく、同一の塗料を2層以上に分けて塗布してもよい。さらに、2つ以上の層を同時に塗布する同時多層塗布を行ってもよい。また、各層を形成し終えた後、又は全ての層を形成し終えた後の任意の過程で、スーパーカレンダー、ソフトカレンダー等の既知の方法を用いて平滑化処理することができる。
中空粒子A:平均粒子径(D50)5.0μm、最大粒子径(D100)13.5μm、中空率90%、2μm以下の粒子の割合0.2体積%、固形分濃度15.0%、発泡タイプ
中空粒子B:平均粒子径(D50)11μm、最大粒子径(D100)23μm、中空率93%、2μm以下の粒子の割合0体積%、固形分濃度15.0%、発泡タイプ
中空粒子C:商品名「ローペイクSN-1055」(ダウ・ケミカル社製)、平均粒子径(D50)1.0μm、最大粒子径(D100)1.8μm、中空率55%、2μm以下の粒子の割合100体積%、固形分濃度26.5%、非発泡タイプ
各中空粒子の平均粒子径(D50)と最大粒子径(D100)とは、レーザ回折式粒度分布測定装置SALD2200(島津製作所社製)を用いて、屈折率1.70-0.01iにて測定した。
ラテックスA:スチレン-ブタジエン系共重合体ラテックス開発品(Tg:-35℃、粒子径300nm、固形分濃度48%)
ラテックスB:スチレン-ブタジエン系共重合体ラテックス開発品(Tg:-10℃、粒子径190nm、固形分濃度48%)
ラテックスC:スチレン-ブタジエン系共重合体ラテックス(商品名L-1571、旭化成社製、Tg:-3℃、粒子径190nm、固形分濃度48%)
水酸化アルミニウム:商品名:ハイジライトH-42、昭和電工社製、吸油量43ml/100g
炭酸カルシウム:商品名:ブリリアント-15、白石工業社製、吸油量56ml/100g
クレー:商品名:HYDRAGLOSS90、KaMinLLC社製、吸油量46ml/100g
無定形シリカ:商品名:ニップシールE743、東ソー・シリカ社製、吸油量160ml/100g
(1)下塗り層用塗料の調製
中空粒子A100部、無機顔料Iとして焼成カオリン(商品名アンシレックス93、BASF社製、吸油量105ml/100g)38部、ラテックスAを79.2部、酸化澱粉の25%溶液32部、カルボキシメチルセルロース(商品名:セロゲンAGガム、第一工業製薬社製)1.1部、及び水100部を混合撹拌して、下塗り層用塗料を得た。
3-ジ(n-ブチル)アミノ-6-メチル-7-アニリノフルオラン40部、ポリビニルアルコール(重合度500、鹸化度88%)の10%水溶液40部、及び水20部を混合し、サンドミル(アイメックス社製、サンドグラインダー)を用いて、平均粒子径が0.5μmになるまで粉砕してロイコ染料分散液(A液)を得た。
N,N’-ジ-[3-(p-トルエンスルホニルオキシ)フェニル]尿素40部、ポリビニルアルコール(重合度500、鹸化度88%)の10%水溶液40部、及び水20部を混合し、サンドミル(アイメックス社製、サンドグラインダー)を用いて、平均粒子径が1.0μmになるまで粉砕して顕色剤分散液(B液)を得た。
1,2-ジ(3-メチルフェノキシ)エタン(商品名:KS-232、三光社製)40部、ポリビニルアルコール(重合度500、鹸化度88%)の10%水溶液40部、及び水20部を混合し、サンドミル(アイメックス社製、サンドグラインダー)を用いて、平均粒子径が1.0μmになるまで粉砕して増感剤分散液(C液)を得た。
A液31.8部、B液63.6部、C液22.7部、完全鹸化ポリビニルアルコール(商品名:PVA110、鹸化度:99モル%、平均重合度:1000、クラレ社製)の15%水溶液46.7部、スチレン-ブタジエン系共重合体ラテックス(商品名:L-1571、旭化成社製、固形分濃度48%)14.6部、水酸化アルミニウム(商品名:ハイジライトH-42、昭和電工社製)32部、アジピン酸ジヒドラジド(大塚化学社製)2部、及び水200部を混合撹拌して感熱記録層用塗料を得た。
ジアセトン変性ポリビニルアルコール(商品名:DF-10、日本酢ビ・ポバール社製)の12%水溶液300部、クレー(商品名:HYDRAGLOSS90、KaMinLLC社製)62部、ポリエチレンワックス(商品名:ケミパールW-400、三井化学社製、固形分濃度40%)0.5部、ステアリン酸亜鉛(商品名:ハイドリンZ-8-36、中京油脂社製、固形分濃度36%)5部、及び水150部からなる組成物を混合撹拌して保護層用塗料を得た。
坪量60g/m2の上質紙の片面上に、下塗り層用塗料、感熱記録層用塗料、及び保護層用塗料を乾燥後の塗布量がそれぞれ4.5g/m2、3.5g/m2、2.5g/m2になるように塗布及び乾燥して、下塗り層、感熱記録層、及び保護層を順次形成した後、スーパーカレンダーで表面を平滑化して感熱記録体を得た。
実施例1の感熱記録層用塗料の調製において、水酸化アルミニウムに代えて炭酸カルシウム(商品名:ブリリアント-15、白石工業社製)とした以外は、実施例1と同様に感熱記録体を得た。
実施例1の感熱記録層用塗料の調製において、水酸化アルミニウムに代えてクレー(商品名:HYDRAGLOSS90、KaMinLLC社製)とした以外は、実施例1と同様に感熱記録体を得た。
実施例1の下塗り層用塗料の調製において、中空粒子Aの量を100部に代えて46.7部とし、焼成カオリンの量を38.0部に代えて46.0部とし、水の量を100部に代えて145部とした以外は、実施例1と同様に感熱記録体を得た。
実施例1の下塗り層用塗料の調製において、ラテックスAに代えてラテックスBとした以外は、実施例1と同様に感熱記録体を得た。
実施例1の下塗り層用塗料の調製において、ラテックスAに代えてラテックスCとした以外は、実施例1と同様に感熱記録体を得た。
実施例1の下塗り層用塗料の調製において、中空粒子Aに代えて中空粒子Bとした以外は、実施例1と同様に感熱記録体を得た。
実施例1の感熱記録層用塗料の調製において、C液の量を22.7部に代えて45.5部とし、水酸化アルミニウムの量を32部に代えて22部とし、水の量を200部に代えて190部とした以外は、実施例1と同様に感熱記録体を得た。
顕色剤分散液(D液)調製
4,4’-ビス(3-トシルウレイド)ジフェニルメタン40部、ポリビニルアルコール(重合度500、鹸化度88%)の10%水溶液40部、及び水20部を混合し、サンドミル(アイメックス社製、サンドグラインダー)を用いて、平均粒子径が1.0μmになるまで粉砕して顕色剤分散液(D液)を得た。
顕色剤分散液(E液)調製
上記一般式(2)で表されるウレアウレタン化合物40部、ポリビニルアルコール(重合度500、鹸化度88%)の10%水溶液40部、及び水20部を混合し、サンドミル(アイメックス社製、サンドグラインダー)を用いて、平均粒子径が1.0μmになるまで粉砕して顕色剤分散液(E液)を得た。
顕色剤分散液(F液)調製
上記一般式(3)で表されるジフェニルスルホン架橋型化合物40部、ポリビニルアルコール(重合度500、鹸化度88%)の10%水溶液40部、及び水20部を混合し、サンドミル(アイメックス社製、サンドグラインダー)を用いて、平均粒子径が1.0μmになるまで粉砕して顕色剤分散液(F液)を得た。
実施例1の感熱記録層用塗料の調製において、C液の量を22.7部に代えて0部とし、水酸化アルミニウムの量を32部に代えて42部とし、水の量を200部に代えて210部とした以外は、実施例1と同様に感熱記録体を得た。
実施例1の下塗り層用塗料の調製において、焼成カオリンの量を38部に代えて66部とし、ラテックスAの79.2部に代えてラテックスCの20.8部とし、中空粒子Aの100部に代えて中空粒子Cの56.6部とし、水の量を100部に代えて175部とした以外は、実施例1と同様に感熱記録体を得た。
実施例1の下塗り層用塗料の調製において、中空粒子Aに代えて中空粒子Cとし、焼成カオリンの量を38部に代えて50部とし、ラテックスAの79.2部に代えてラテックスCの25部とし、酸化澱粉の25%溶液の量を32部に代えて20部とし、水の量を100部に代えて130部とした以外は、実施例1と同様に下塗り層用塗料を得た。
実施例1の感熱記録層用塗料の調製において、水酸化アルミニウムに代えて無定形シリカ(商品名:ニップシールE743、東ソー・シリカ社製)とした以外は、実施例1と同様に感熱記録体を得た。
感熱記録評価機(商品名:TH-PMD、大倉電機社製)を用い、印加エネルギー:0.17mJ/dot(中間調)と0.25mJ/dot(高階調)にて各感熱記録体を記録し、得られた記録部の反射濃度を分光濃度計(X-Rite504、X-Rite社製)で測定した。
ポリカーボネイトパイプ(直径40mm)上にラップフィルム(商品名:ハイエスソフト、日本カーバイド工業社製)を3重に巻付け、その上にラベルプリンタ(商品名:L-2000、イシダ社製)を用いて発色させた各感熱記録体のサンプルを載せ、さらにその上にラップフィルムを3重に巻き付けて、40℃の環境下で24時間静置して処理した。この処理の前後において、記録部の反射濃度を分光濃度計(X-Rite504、X-Rite社製)で測定した。また、下記式により、記録部の残存率を求めた。
残存率(%)=(処理後の記録濃度/処理前の記録濃度)×100
ポリカーボネイトパイプ(直径40mm)上にラップフィルム(商品名:ハイエスソフト、日本カーバイド工業社製)を3重に巻付け、その上にラベルプリンタ(商品名:L-2000、イシダ社製)を用いて発色させた各感熱記録体を水に5秒間浸漬させたサンプル載せ、さらにその上にラップフィルムを3重に巻き付けて、40℃の環境下で24時間静置して処理した。この処理の前後において、記録部の反射濃度を分光濃度計(X-Rite504、X-Rite社製)で測定した。また、下記式により、記録部の残存率を求めた。
残存率(%)=(処理後の記録濃度/処理前の記録濃度)×100
ラベルプリンタ(商品名:L-2000、イシダ社製)を用いて発色させた各感熱記録体のサンプルを、75体積%エタノール水溶液にそれぞれ10分間と30分間浸漬して処理した。この処理の前後において、記録部の反射濃度を分光濃度計(X-Rite504、X-Rite社製)で測定した。また、下記式により、記録部の残存率を求めた。
残存率(%)=(処理後の記録濃度/処理前の記録濃度)×100
Claims (11)
- 支持体上に、中空粒子、接着剤及び無機顔料Iを含有する下塗り層、ロイコ染料、顕色剤及び無機顔料IIを含有する感熱記録層をこの順に有する感熱記録体において、前記顕色剤として下記一般式(1):
- 前記無機顔料Iの含有割合が下塗り層の全固形量のうち60質量%以下である、請求項1に記載の感熱記録体。
- 前記無機顔料Iの吸油量が130ml/100g以下である、請求項1又は2に記載の感熱記録体。
- 前記無機顔料IIが炭酸カルシウム、水酸化アルミニウム及びクレーからなる群より選ばれる少なくとも1種である、請求項1~3のいずれか1項に記載の感熱記録体。
- 前記中空粒子の最大粒子径(D100)が10~40μmであり、平均粒子径(D50)が4.0~15μmであり、最大粒子径(D100)と平均粒子径(D50)との比D100/D50が1.8~3.0であり、粒子径2.0μm以下の体積%が1%以下である、請求項1~4のいずれか1項に記載の感熱記録体。
- 前記中空粒子の中空率が80~98%である、請求項1~5のいずれか1項に記載の感熱記録体。
- 前記下塗り層が-10℃以下のガラス転移温度を有する接着剤を含有する、請求項1~6のいずれか1項に記載の感熱記録体。
- 前記第2の顕色剤の含有量がロイコ染料1質量部に対して0.2~3質量部である、請求項8に記載の感熱記録体。
- 前記一般式(1)で表されるN,N’-ジアリール尿素系化合物がN,N’-ジ-[3-(p-トルエンスルホニルオキシ)フェニル]尿素、N,N’-ジ-[3-(o-トルエンスルホニルオキシ)フェニル]尿素、N,N’-ジ-[3-(ベンゼンスルホニルオキシ)フェニル]尿素、N,N’-ジ-[3-(メシチレンスルホニルオキシ)フェニル]尿素、N,N’-ジ-[3-(4-エチルベンゼンスルホニルオキシ)フェニル]尿素、N,N’-ジ-[3-(2-ナフタレンスルホニルオキシ)フェニル]尿素、N,N’-ジ-[3-(p-メトキシベンゼンスルホニルオキシ)フェニル]尿素、N,N’-ジ-[3-(ベンジルスルホニルオキシ)フェニル]尿素、N,N’-ジ-[3-(エタンスルホニルオキシ)フェニル]尿素、N,N’-ジ-[3-(p-トルエンスルホニルオキシ)-4-メチル-フェニル]尿素、N,N’-ジ-[4-(p-トルエンスルホニルオキシ)フェニル]尿素、N,N’-ジ-[4-(ベンゼンスルホニルオキシ)フェニル]尿素、N,N’-ジ-[4-(エタンスルホニルオキシ)フェニル]尿素、及びN,N’-ジ-[2-(p-トルエンスルホニルオキシ)]フェニル尿素からなる群より選ばれる少なくとも1種である、請求項1~9のいずれか1項に記載の感熱記録体。
- 前記支持体の少なくとも一方面に粘着層を有する、請求項1~10のいずれか1項に記載の感熱記録体。
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WO2019044462A1 (ja) * | 2017-08-31 | 2019-03-07 | 三光株式会社 | N,n'-ジアリール尿素誘導体、その製造方法及びそれを用いた感熱記録材料 |
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WO2020004558A1 (ja) * | 2018-06-29 | 2020-01-02 | 王子ホールディングス株式会社 | 感熱記録体 |
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WO2019044462A1 (ja) * | 2017-08-31 | 2019-03-07 | 三光株式会社 | N,n'-ジアリール尿素誘導体、その製造方法及びそれを用いた感熱記録材料 |
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