CN102089154B - Powder mixture for thermal recording material, and process for producing powder mixture for thermal recording material - Google Patents
Powder mixture for thermal recording material, and process for producing powder mixture for thermal recording material Download PDFInfo
- Publication number
- CN102089154B CN102089154B CN200980127085.7A CN200980127085A CN102089154B CN 102089154 B CN102089154 B CN 102089154B CN 200980127085 A CN200980127085 A CN 200980127085A CN 102089154 B CN102089154 B CN 102089154B
- Authority
- CN
- China
- Prior art keywords
- dye
- developer
- powder
- thermal recording
- dispersant
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000000843 powder Substances 0.000 title claims abstract description 118
- 239000000203 mixture Substances 0.000 title claims abstract description 67
- 239000000463 material Substances 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title description 18
- 230000008569 process Effects 0.000 title description 3
- 239000006185 dispersion Substances 0.000 claims abstract description 93
- 239000002270 dispersing agent Substances 0.000 claims abstract description 57
- 239000002245 particle Substances 0.000 claims abstract description 41
- 238000001694 spray drying Methods 0.000 claims abstract description 14
- 238000001035 drying Methods 0.000 claims abstract description 13
- 239000007788 liquid Substances 0.000 claims description 53
- 239000008187 granular material Substances 0.000 claims description 46
- 238000002360 preparation method Methods 0.000 claims description 13
- 238000000576 coating method Methods 0.000 abstract description 49
- 239000011248 coating agent Substances 0.000 abstract description 47
- 239000012530 fluid Substances 0.000 abstract description 44
- 230000035945 sensitivity Effects 0.000 abstract description 13
- 230000007423 decrease Effects 0.000 abstract description 3
- 238000003860 storage Methods 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 238000005549 size reduction Methods 0.000 abstract 2
- 238000004040 coloring Methods 0.000 abstract 1
- 239000000975 dye Substances 0.000 description 113
- 239000002609 medium Substances 0.000 description 77
- 239000004372 Polyvinyl alcohol Substances 0.000 description 11
- 229910000040 hydrogen fluoride Inorganic materials 0.000 description 11
- 229920002451 polyvinyl alcohol Polymers 0.000 description 11
- 235000019422 polyvinyl alcohol Nutrition 0.000 description 11
- -1 dimethylamino benzhydryl benzylic ethers Chemical class 0.000 description 9
- 230000000694 effects Effects 0.000 description 9
- 238000011156 evaluation Methods 0.000 description 9
- 239000000758 substrate Substances 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 239000000654 additive Substances 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 5
- 239000013530 defoamer Substances 0.000 description 5
- 239000012153 distilled water Substances 0.000 description 5
- 150000002148 esters Chemical class 0.000 description 5
- WNZQDUSMALZDQF-UHFFFAOYSA-N 2-benzofuran-1(3H)-one Chemical compound C1=CC=C2C(=O)OCC2=C1 WNZQDUSMALZDQF-UHFFFAOYSA-N 0.000 description 4
- 229910019142 PO4 Inorganic materials 0.000 description 4
- 239000002253 acid Substances 0.000 description 4
- 230000000996 additive effect Effects 0.000 description 4
- 239000010452 phosphate Substances 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- FJKROLUGYXJWQN-UHFFFAOYSA-N 4-hydroxybenzoic acid Chemical compound OC(=O)C1=CC=C(O)C=C1 FJKROLUGYXJWQN-UHFFFAOYSA-N 0.000 description 3
- 229930185605 Bisphenol Natural products 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 3
- 125000003118 aryl group Chemical group 0.000 description 3
- LXOFYPKXCSULTL-UHFFFAOYSA-N 2,4,7,9-tetramethyldec-5-yne-4,7-diol Chemical compound CC(C)CC(C)(O)C#CC(C)(O)CC(C)C LXOFYPKXCSULTL-UHFFFAOYSA-N 0.000 description 2
- VPWNQTHUCYMVMZ-UHFFFAOYSA-N 4,4'-sulfonyldiphenol Chemical class C1=CC(O)=CC=C1S(=O)(=O)C1=CC=C(O)C=C1 VPWNQTHUCYMVMZ-UHFFFAOYSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 239000012736 aqueous medium Substances 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical class OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- NUVBSKCKDOMJSU-UHFFFAOYSA-N ethylparaben Chemical compound CCOC(=O)C1=CC=C(O)C=C1 NUVBSKCKDOMJSU-UHFFFAOYSA-N 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- YJBBXGRGTYVXLB-UHFFFAOYSA-N hexane;phenol Chemical class CCCCCC.OC1=CC=CC=C1 YJBBXGRGTYVXLB-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- CXKWCBBOMKCUKX-UHFFFAOYSA-M methylene blue Chemical compound [Cl-].C1=CC(N(C)C)=CC2=[S+]C3=CC(N(C)C)=CC=C3N=C21 CXKWCBBOMKCUKX-UHFFFAOYSA-M 0.000 description 2
- 229960000907 methylthioninium chloride Drugs 0.000 description 2
- CFVVSQSFKWLGAX-UHFFFAOYSA-N phenol;propane Chemical compound CCC.OC1=CC=CC=C1 CFVVSQSFKWLGAX-UHFFFAOYSA-N 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- LIZLYZVAYZQVPG-UHFFFAOYSA-N (3-bromo-2-fluorophenyl)methanol Chemical compound OCC1=CC=CC(Br)=C1F LIZLYZVAYZQVPG-UHFFFAOYSA-N 0.000 description 1
- XAAILNNJDMIMON-UHFFFAOYSA-N 2'-anilino-6'-(dibutylamino)-3'-methylspiro[2-benzofuran-3,9'-xanthene]-1-one Chemical compound C=1C(N(CCCC)CCCC)=CC=C(C2(C3=CC=CC=C3C(=O)O2)C2=C3)C=1OC2=CC(C)=C3NC1=CC=CC=C1 XAAILNNJDMIMON-UHFFFAOYSA-N 0.000 description 1
- AGIJRRREJXSQJR-UHFFFAOYSA-N 2h-thiazine Chemical compound N1SC=CC=C1 AGIJRRREJXSQJR-UHFFFAOYSA-N 0.000 description 1
- ZWQBZEFLFSFEOS-UHFFFAOYSA-N 3,5-ditert-butyl-2-hydroxybenzoic acid Chemical compound CC(C)(C)C1=CC(C(O)=O)=C(O)C(C(C)(C)C)=C1 ZWQBZEFLFSFEOS-UHFFFAOYSA-N 0.000 description 1
- PYSRRFNXTXNWCD-UHFFFAOYSA-N 3-(2-phenylethenyl)furan-2,5-dione Chemical compound O=C1OC(=O)C(C=CC=2C=CC=CC=2)=C1 PYSRRFNXTXNWCD-UHFFFAOYSA-N 0.000 description 1
- 229940090248 4-hydroxybenzoic acid Drugs 0.000 description 1
- QHPQWRBYOIRBIT-UHFFFAOYSA-N 4-tert-butylphenol Chemical compound CC(C)(C)C1=CC=C(O)C=C1 QHPQWRBYOIRBIT-UHFFFAOYSA-N 0.000 description 1
- DPTAYXRMLJNOCN-UHFFFAOYSA-N 5-(dimethylamino)-3h-2-benzofuran-1-one Chemical compound CN(C)C1=CC=C2C(=O)OCC2=C1 DPTAYXRMLJNOCN-UHFFFAOYSA-N 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- QFOHBWFCKVYLES-UHFFFAOYSA-N Butylparaben Chemical compound CCCCOC(=O)C1=CC=C(O)C=C1 QFOHBWFCKVYLES-UHFFFAOYSA-N 0.000 description 1
- ZOIDYAGQNZONLJ-UHFFFAOYSA-N C(CCC)N(C=1C=CC=2CC3=CC=C(C=C3OC2C1)C)CCCC Chemical compound C(CCC)N(C=1C=CC=2CC3=CC=C(C=C3OC2C1)C)CCCC ZOIDYAGQNZONLJ-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 description 1
- 239000004354 Hydroxyethyl cellulose Substances 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- YGSDEFSMJLZEOE-UHFFFAOYSA-N Salicylic acid Natural products OC(=O)C1=CC=CC=C1O YGSDEFSMJLZEOE-UHFFFAOYSA-N 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 229920000147 Styrene maleic anhydride Polymers 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 150000004996 alkyl benzenes Chemical class 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 125000003236 benzoyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C(*)=O 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- YXVFYQXJAXKLAK-UHFFFAOYSA-N biphenyl-4-ol Chemical compound C1=CC(O)=CC=C1C1=CC=CC=C1 YXVFYQXJAXKLAK-UHFFFAOYSA-N 0.000 description 1
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 1
- JRZCGMGYTDEOII-UHFFFAOYSA-N butanedioic acid;2-sulfobutanedioic acid Chemical compound OC(=O)CCC(O)=O.OC(=O)CC(C(O)=O)S(O)(=O)=O JRZCGMGYTDEOII-UHFFFAOYSA-N 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 229920003064 carboxyethyl cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000003618 dip coating Methods 0.000 description 1
- CZZYITDELCSZES-UHFFFAOYSA-N diphenylmethane Chemical compound C=1C=CC=CC=1CC1=CC=CC=C1 CZZYITDELCSZES-UHFFFAOYSA-N 0.000 description 1
- 239000000986 disperse dye Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000010228 ethyl p-hydroxybenzoate Nutrition 0.000 description 1
- 239000004403 ethyl p-hydroxybenzoate Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- MDQRDWAGHRLBPA-UHFFFAOYSA-N fluoroamine Chemical compound FN MDQRDWAGHRLBPA-UHFFFAOYSA-N 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- VLKZOEOYAKHREP-UHFFFAOYSA-N hexane Substances CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 1
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000010365 information processing Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 125000000636 p-nitrophenyl group Chemical group [H]C1=C([H])C(=C([H])C([H])=C1*)[N+]([O-])=O 0.000 description 1
- GQCRMKIDBZVXFG-UHFFFAOYSA-N pentane;phenol Chemical class CCCCC.OC1=CC=CC=C1 GQCRMKIDBZVXFG-UHFFFAOYSA-N 0.000 description 1
- 229960003742 phenol Drugs 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 150000003014 phosphoric acid esters Chemical class 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Substances [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 230000009467 reduction 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
- 238000005096 rolling process Methods 0.000 description 1
- 229960004889 salicylic acid Drugs 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 239000000080 wetting agent Substances 0.000 description 1
Images
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
- B41M5/337—Additives; Binders
- B41M5/3372—Macromolecular compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M2205/00—Printing methods or features related to printing methods; Location or type of the layers
- B41M2205/28—Storage stability; Improved self life
-
- 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
- B41M5/333—Colour developing components therefor, e.g. acidic compounds
- B41M5/3333—Non-macromolecular compounds
- B41M5/3335—Compounds containing phenolic or carboxylic acid groups or metal salts thereof
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Heat Sensitive Colour Forming Recording (AREA)
Abstract
Size reduction in dye particles has been advanced in order to obtain a thermal recording material having high sensitivity. However, this size reduction has posed problems such as a decrease of the storage stability of coating fluids and the progress of coloring caused by reaction with a color developer. For solving the problems, provided is a powder mixture comprising dye particles, color developer particles, and a given amount of a dispersant, the mixture being achieved based on a novel idea, which has not existed so far. The powder mixture for a thermal recording material comprises: a dye powder obtained by drying a dye dispersion containing dye particles and a dispersant, the amount of the dispersant being 5-150 parts by weight per 100 parts by weight of the dye particles; and a color developer powder obtained by drying a color developer dispersion containing color developer particles and a dispersant. The drying of the dispersions preferably is spray drying.
Description
Technical field
The present invention relates to that heat obtains developing the color by applying, highly sensitive thermal recording medium.The invention still further relates to by be dispersed in the decentralized medium and disperse after be coated on powder mixture for thermal recording material of obtaining highly sensitive thermal recording medium on the base material and preparation method thereof and by being coated on the thermal recording medium coating fluid that obtains highly sensitive thermal recording medium on the base material.
Background technology
In recent years, study, developed various recording materials and practical application information recording/field people.Wherein a kind of is thermal recording medium, and thermal recording medium has the following advantages: (1) only can record easy image by heating process; (2) mechanism of the necessary device of record is simple, so the easily miniaturization of implement device; (3) operability of material is excellent and cheap etc.Therefore, thermal recording medium is widely used in the various fields such as field of information processing (such as the output of electronic calculator, computer), medical metering field (such as the record of metrical instrument), the communications field (such as fax), field of traffic (such as the automatic machine of ticket, admission ticket), business equipment field (such as duplicator), the field of circulation (such as the label of POS system).
Thermal recording medium will satisfy following requirement: the fastness that obtains fast the colour developing of high concentration and the image that forms by colour developing and background color (flesh) is high.The former also is said to is highly sensitive thermal recording medium.Method as obtaining highly sensitive thermal recording medium for example has: the melting point that reduces developer (developer have along with heating makes the chemical constitution of dyestuff (developer) change, make the effect of dyestuff colour developing); Perhaps interpolation and dyestuff and developer melt, reduce the sensitizer as the melting point of thermal recording medium altogether.In the past, thermal recording medium be will be respectively the mixed liquor of dispersion liquid of the dispersion liquid of dye granule of preparation and developer particle be that coating fluid is coated on the base material and forms, up to now, because the miniaturization of dye granule and the improvement of dispersant, the high-sensitivity of thermal recording medium are improved (with reference to Japanese kokai publication sho 58-179691 communique, Japanese kokai publication hei 8-48076 communique, Japanese kokai publication hei 11-321103 communique).
The prior art document
Patent documentation
Patent documentation 1: Japanese kokai publication sho 58-179691 communique
Patent documentation 2: Japanese kokai publication hei 8-48076 communique
Patent documentation 3: Japanese kokai publication hei 11-321103 communique
Summary of the invention
Invent problem to be solved
By the miniaturization of dye granule, really realized the high-sensitivity of thermal recording medium.But, research according to inventor etc., the particle diameter of dye granule is finer, the viscosity stability of coating fluid (particularly circulate, the viscosity stability when when keeping etc., coating fluid was placed) more reduces, and coating fluid in time and thickening or again aggegation or precipitation occur as the dye granule of dispersate.In addition, because dye granule and the intergranular reaction of developer occur painted easily in time.
Solve the method for problem
The result of the further investigation such as the inventor, conceived following methods: by with dyestuff and developer dispersion liquid (dye dispersion liquid and developer dispersion) drying separately, form respectively powder (dye powder and developer powder), to mix form circulation, the keeping of the mixture of powders that this powder obtains, after any time (for example when base material is coated with) this mixture is scattered in the decentralized medium again, form coating fluid.
Namely, powder mixture for thermal recording material of the present invention contains dye powder and developer powder, described dye powder drying contains dye granule and dispersant and is that the dye dispersion liquid of 5～150 weight portions obtains with respect to the content of the above-mentioned dispersant of the above-mentioned dye granule of 100 weight portions, and the developer dispersion that described developer powder drying contains developer particle and dispersant obtains.
Thermal recording medium coating fluid of the present invention is that powder mixture for thermal recording material of the present invention is dispersed in the coating fluid that obtains in the decentralized medium.
Thermal recording medium of the present invention comprises base material and is configured in the heat sensitive recording layer of above-mentioned substrate surface, and above-mentioned heat sensitive recording layer is that thermal recording medium coating fluid of the present invention is coated on the layer that substrate surface obtains.
The preparation method of powder mixture for thermal recording material of the present invention is: will contain dye granule and dispersant and be that the dye dispersion liquid spray-drying of 5～150 weight portions forms dye powder with respect to the content of the above-mentioned dispersant of the above-mentioned dye granule of 100 weight portions, and the developer dispersion spray-drying that will contain developer particle and dispersant forms the developer powder, the dye powder and the developer powder that mix above-mentioned formation form mixture of powders.
The invention effect
Mixture of powders of the present invention has good dispersiveness, forms the thermal recording medium coating fluid in the decentralized medium by being scattered in.Mixture of powders of the present invention is stability (storage stability) height when circulation, keeping, even in the fine situation of dispersate, particularly dye granule, this particle also is difficult for occuring aggegation.In other words, even after circulation, keeping this mixture is scattered in the situation that forms coating fluid in the decentralized medium, the particle diameter of dispersate, particularly dye granule also is difficult for increasing, and can obtain highly sensitive thermal recording medium.In addition, mixture of powders of the present invention is difficult for occuring painted, even also can obtain the high coating fluid of whiteness and thermal recording medium after circulation, keeping.And, owing to be mixture of powders, so compare operability with coating fluid in the past, transporting is excellent.
Need to prove, with in the past coating fluid, when namely the mixed liquor of the dispersion liquid of the dispersion liquid of the dye granule of preparation out of the ordinary and developer particle is dry, can't obtain such effect.
Description of drawings
Fig. 1 is the figure of evaluation result of the developing sensitivity of the average grain diameter (before disperseing again and after disperseing again) that shows the dye granule of making among the embodiment and electrothermal sensitive recording paper.
The specific embodiment
(powder mixture for thermal recording material)
Mixture of powders of the present invention contains dye powder and developer powder, described dye powder is that the dye dispersion liquid that drying contains dye granule and dispersant obtains, and described developer powder is that the developer dispersion that drying contains developer particle and dispersant obtains.The content of the dispersant in the dye dispersion liquid is 5～150 weight portions with respect to 100 weight portion dye granules.
Dyestuff (colour former) is not particularly limited, can uses the dyestuff that uses in known thermal recording medium or the pressure sensitive recording material.Object lesson has: for example 3, crystal violet lactone), 3-(to dimethylaminophenyl)-3-(1 two (to the dimethylaminophenyl)-6-dimethylamino phthalides of 3-(another name:, 2-dimethyl indole-3-yl) phthalide, 3-(to dimethylaminophenyl)-3-(2-phenylindone-3-yl) phthalide, 3,3-pair-(9-ethyl carbazole-3-yl)-triarylmethane based compounds such as 5-dimethylamino phthalide; The diphenyl methane based compounds such as 4,4 '-two dimethylamino benzhydryl benzylic ethers (4,4 '-PVC ス ジ メ チ Le ア ミ ノ ベ Application ズ ヒ De リ Application ベ Application ジ Le エ, one テ Le), N-halogenophenyl platinum amine; Rhodamine B-anilino-lactams, 3-diethylamino-7-benzylamino fluorane, the amino fluorane of 3-diethylamino-7-butyl, 3-diethylamino-7-(chloroanilino) fluorane, 3-diethylamino-6-methyl-7-anilino fluorane, 3-piperidyl-6-methyl-7-anilino fluorane, 3-ethyl-silicyl amino-6-methyl-7-anilino fluorane, 3-cyclohexyl-methylamino-6-methyl-7-anilino fluorane, 3-diethylamino-amino the fluorane of 6-chloro-7-(β-ethoxyethyl group), 3-diethylamino-amino the fluorane of 6-chloro-7-(γ-chloropropyl), 3-(N-ethyl-N-isopentyl)-6-methyl-7-phenyl amino fluorane, 3-dibutylamino-6-methyl-xanthene based compounds such as 7-anilino fluorane; The thiazine based compounds such as benzoyl procrypsis methylene blue, p-nitrophenyl formoxyl procrypsis methylene blue; 3-methyl-spiral shell-dinaphthopyran, 3-ethyl-spiral shell-dinaphthopyran, 3-benzyl spiral shell-dinaphthopyran, 3-methyl naphthalene-(3-methoxyl group-benzo)-spiral shell based compounds such as spiro-pyrans.Can use two or more above-mentioned dyestuffs.The kind of dyestuff can be selected according to the purposes of thermal recording medium.
Developer is not particularly limited, can uses the developer that uses in known thermal recording medium or the pressure sensitive recording material.The preferred phenols of developer or aromatic carboxylic acid's derivative, particularly preferably bisphenols.Object lesson has: phenol such as POP, p-t-butyl phenol, p-phenyl phenol; 1, two (p-hydroxybenzene) propane, 2 of 1-, two (p-hydroxybenzene) propane, 1 of 2-, two (p-hydroxybenzene) pentanes, 1 of 1-, two (p-hydroxybenzene) hexanes, 2 of 1-, two (p-hydroxybenzene) hexanes, 1 of 2-, two (the p-hydroxybenzene)-2-ethyl hexanes, 2 of 1-, the bisphenols such as two (4-hydroxyl-3, the 5-dichlorophenyl) propane of 2-; Dihydroxydiphenyl ether; P-hydroxybenzoic acid, ethyl-para-hydroxybenzoate, butyl p-hydroxybenzoate, 3,5-di-tert-butyl salicylic acid, 3, the multivalent metal salt of aromatic carboxylic acid's derivative such as 5-two-α-methylbenzyl salicylic acid and this derivative.Can use two or more above-mentioned developers.The kind of developer can be selected according to the purposes of thermal recording medium.
Dispersant is not particularly limited, can uses the dispersant that uses in known thermal recording medium or the pressure sensitive recording material.Object lesson has: polyvinyl alcohol (PVA) for example, modified polyvinylalcohol (carboxyl acid modified PVA for example, sulfonic acid modified PVA), sulfonated cellulose, sulfonated starch, carboxyethyl cellulose, hydroxyethylcellulose, polyacrylic acid, ethene-copolymer-maleic anhydride, methyl vinyl ether-maleic acid copolymer, vinyl acetate-copolymer-maleic anhydride, isobutene-copolymer-maleic anhydride, styrene-maleic anhydride copolymer, higher alcohol sulfate, the alkyl, polyether sulfuric ester, alkyl sulfonic acid and salt thereof, aryl sulfonic acid and salt thereof, phosphoric acid ester (aliphatic phosphate ester and aromatic phosphate acid ester), polyxyethylated sulfuric ester, the polyoxyethylene aromatic yl acid ester, polyxyethylated aromatic yl acid ester, the dialkyl sulfosuccinate succinate, alkyl benzene sulphonate and salt thereof, the polyoxyalkylene alkyl ether phosphate, polyoxyalkylene alkylaryl ether phosphate.Wherein, PVA and modified PVA are owing to dispersion stabilization excellence, the while of dye granule and developer particle obtain polymolecularity as mixture of powders in decentralized medium, therefore particularly preferably.Dispersant can be the same or different in dye dispersion liquid and developer dispersion, can use two or more above-mentioned dispersants in dispersion liquid separately.
Dye dispersion liquid and developer dispersion can utilize known method to obtain.For example, can use ball mill, grater, sand mill, SC grinder, annular abrasion machine, spike mill, Coball grinder, Dyno grinder etc., dispersant and dyestuff or developer together are dispersed in the decentralized medium.
Decentralized medium to dye dispersion liquid and developer dispersion is not particularly limited, and is preferably aqueous medium, for example water.
As long as dye dispersion liquid and developer dispersion obtain effect of the present invention, can contain the material except dyestuff or developer and dispersant.
Consider that from the angle that obtains highly sensitive thermal recording medium the average grain diameter of the dye granule in the dye dispersion liquid for example is 0.1～1 μ m, preferred 0.2～0.7 μ m, more preferably 0.3～0.5 μ m.
Although the average grain diameter of the developer particle in the developer dispersion does not resemble the sensitivity that affects thermal recording medium the average grain diameter of dye granule, but consider from the angle that obtains highly sensitive thermal recording medium, be preferably 0.1～1 μ m, more preferably 0.2～0.7 μ m, more preferably 0.3～0.5 μ m.
In dye dispersion liquid, with respect to 100 weight portion dye granules, the content of dispersant is 5～150 weight portions, can obtain effect of the present invention in the time of in this scope.Dispersant contain quantity not sufficient 5 weight portion the time, dye granule can't Uniform Dispersion in dye dispersion liquid, the mixture of powders that obtains is scattered in the decentralized medium when forming coating fluid, the average grain diameter of dye granule (average grain diameter after disperseing again) becomes large, sensitivity and the Image Saving decline of the final thermal recording medium that forms.And when the content of dispersant surpasses 150 weight portion, the mixture of powders that obtains is scattered in when forming coating fluid in the decentralized medium, the aggegation of dye granule generation secondary, the sensitivity of the final thermal recording medium that forms and quality descend.
In dye dispersion liquid, with respect to 100 weight portion dye granules, preferred 20～100 weight portions of the content of dispersant, more preferably 40～80 weight portions, further preferred 40～60 weight portions.In the time of in above-mentioned scope, the particle diameter of the dye granule after can suppressing to disperse again increases (according to circumstances can keep equal) with respect to the particle diameter of the dye granule in the dye dispersion liquid, more positively obtains highly sensitive thermal recording medium.
In developer dispersion, with respect to 100 weight portion developer particles, preferred 5～150 weight portions of the content of dispersant.Dispersant contain quantity not sufficient 5 weight portion the time, the developer particle can't Uniform Dispersion in developer dispersion, the mixture of powders that obtains is scattered in the decentralized medium when forming coating fluid, the particle diameter of developer particle (particle diameter after disperseing again) becomes large, and sensitivity and the Image Saving of the final thermal recording medium that forms descend sometimes.And when the content of dispersant surpasses 150 weight portion, the mixture of powders that obtains is scattered in when forming coating fluid in the decentralized medium, the aggegation of developer particle generation secondary, sensitivity and the quality of the final thermal recording medium that forms descend sometimes.The content of the developer in the developer dispersion is 20～100 weight portions more preferably, further preferred 40～80 weight portions, particularly preferably 40～60 weight portions.
The content of the dispersant in the dye dispersion liquid and the content of the dispersant in the developer dispersion all are preferably 20～100 weight portions, and more preferably 40～80 weight portions are particularly preferably 40～60 weight portions.
Dye powder and developer powder are respectively the powder that dye dispersion liquid and developer dispersion drying are obtained.Drying means to each dispersion liquid is not particularly limited, but preferably spray drying (spray dry).The effect that the method suppresses the particle diameter increase after disperseing again of dye granule and developer particle, particularly dye granule is good especially.Concrete spray drying process is not particularly limited.Spray-drying can be divided into according to its form: disc type, nozzle-type, impact wave type etc., can adopt any form.Thermal source is not particularly limited, can uses hot blast, heating water steam etc.Spray-dired drying condition can suitably be selected according to the viscosity of the content of dispersate contained in the size of spray dryer and kind, the dispersion liquid, dispersion liquid, the flow of supplying with the dispersion liquid of spray dryer.For example, baking temperature also depends on the kind of dyestuff and developer, but is generally about 80～150 ℃, preferred 100～120 ℃.Particularly preferably the drying means of dye dispersion liquid and developer dispersion is spray-drying.
About the dye powder of gained and the content of the dispersant in the developer powder, as long as until obtain not implementing during dye powder and the developer powder changing the step of the content of dispersant, then the content of the dispersant in dye dispersion liquid and the developer dispersion is identical respectively in the step of dried dye dispersion liquid and developer dispersion or after this step.
Utilize known method, mix dye powder and the developer powder that so operation obtains such as the method for using swing grinder, rotary drum mixer, drum mixer, mixing electromagnetic shaker etc., can obtain mixture of powders of the present invention.
Content to the dye powder in the mixture of powders of the present invention and developer powder is not particularly limited, for example in weight ratio, and dye powder: developer powder=1: 1～1: 5, preferred 1: 1.5～1: 3, further preferred 1: 2～1: 3.
As long as mixture of powders of the present invention obtains effect of the present invention, can contain the material except dye powder and developer powder.
(preparation method of powder mixture for thermal recording material)
Preparation method of the present invention comprises following 3 steps: (1) will be contained dye granule and dispersant and be that the dye dispersion liquid spray-drying of 5～150 weight portions is to form the step of dye powder with respect to the content of 100 weight portion dye granule dispersants; (2) will contain the developer dispersion spray-drying of developer particle and dispersant to form the step of developer powder; And (3) mix the dye powder that forms in the above-mentioned steps and developer powder to form the step of mixture of powders.
Dye granule, developer particle and dispersant need only described in the explanation of above-mentioned mixture of powders of the present invention, and each step needs only according to the mode described in the explanation of the mixture of powders of the invention described above and implements.Each step can be implemented continuously, also can implement respectively in place separately.
When manufacturing contained the mixture of powders of the material except dye powder and developer powder, this material can before obtaining dye powder and developer powder, when namely preparing dye dispersion liquid and developer dispersion or before the spray-drying or obtain dye powder and any time interpolation afterwards of developer powder.
(thermal recording medium coating fluid)
Coating fluid of the present invention is that mixture of powders of the present invention is dispersed in the coating fluid that obtains in the decentralized medium.This coating fluid contains dye granule, developer particle and dispersant.By be coated with coating fluid of the present invention at substrate surface, obtain the heat sensitive recording layer and highly sensitive, the high thermal recording medium of while whiteness that comprise base material and be configured in this substrate surface.Need to prove, in this manual, contained dye powder and developer powder are respectively the dispersion liquid of dried dye particle and developer particle and the powder that obtains in the mixture of powders of the present invention, so the dispersion of the mixture of powders of the present invention that sometimes will carry out in order to obtain coating fluid is called " disperseing " again.
The decentralized medium that disperses mixture of powders of the present invention is not particularly limited, is preferably aqueous medium, for example water.
The method that mixture of powders of the present invention is dispersed in the decentralized medium is not particularly limited, can adopts known method.
As long as coating fluid of the present invention obtains effect of the present invention, can contain the material (additive) except dye granule, developer particle and dispersant.The example of additive has: for example aqueous binder, filler, surfactant, sensitizer, lubrication prescription, defoamer, dispersant, wetting agent, pressure colour developing preventing agent.
When coating fluid of the present invention contained additive, this additive can add at any time.For example, can be before being scattered in mixture of powders of the present invention in the decentralized medium mix with pulverulence, add in the time of also can be in being scattered in decentralized medium.
(thermal recording medium)
Thermal recording medium of the present invention comprises base material and is configured in the heat sensitive recording layer of this substrate surface.Heat sensitive recording layer be in this substrate surface be coated with coating fluid of the present invention and obtain the layer.Thermal recording medium of the present invention obtains by be coated with coating fluid of the present invention at substrate surface.
Base material is not particularly limited, such as paper, film etc. are arranged.
The method that is coated with coating fluid of the present invention at substrate surface is not particularly limited, can adopts the known coating processes such as airblade coating method, board-like rubbing method, intaglio plate rubbing method, rolling method, spraying process, dip coating, scraping article rubbing method, extrusion coated method.
As long as thermal recording medium of the present invention obtains effect of the present invention, can comprise arbitrarily material and layer except base material and heat sensitive recording layer.
Need to prove, as the preparation method of thermal recording medium, the present invention includes following 4 stages.But needn't implement continuously this 4 stages.For example, the step after implementing for the 3rd stage after the mixture of powders that can make in the 2nd stage of keeping.As mentioned above, according to the present invention, suppress to obtain highly sensitive thermal recording medium because taking care of the increase of the dye granule particle diameter that causes.
The 1st stage: with dispersant disperse dyes, developer stage of preparing dispersion liquid (dye dispersion liquid and developer dispersion) respectively.
The 2nd stage: dry each dispersion liquid and with its powdered, mix the stage of preparation powder mixture for thermal recording material afterwards.
The 3rd stage: powder mixture for thermal recording material is disperseed again, add again as required various additives, the stage of preparation thermal recording medium coating fluid.
The 4th stage: be coated with the thermal recording medium coating fluid to form heat sensitive recording layer, the stage of preparation thermal recording medium in substrate surface.
Embodiment
Utilize embodiment and comparative example to further describe the present invention.The present invention is not limited to following examples.Below, as long as no special record, then " part " and " % " is weight basis.
(embodiment 1)
(1) making of dye dispersion liquid and developer dispersion (dispersion of heat sensitive dye and developer)
A. the making of the aqueous liquid dispersion of dyestuff
Dyestuff: (Yamamoto changes into system, ODB-2, common name to leuco dye: 3-dibutylamino-6-methyl-7-anilino fluorane) 100 parts
50 parts of dispersant: PVA (KURARAY system, PVA-203)
Defoamer: 2,4,7,9-tetramethyl-5-decine-4,0.2 part of 7-glycol (Air Products system, SURFYNOL 104E)
Decentralized medium: 225 parts of distilled water
At first, above-mentioned dyestuff, dispersant, defoamer and decentralized medium are dropped in the beaker, stirred in advance 15 minutes.Next, solution in the beaker is dropped in the sand mill (AIMEX system, Ready-mill type NVM-03), filling rate with 82% is to the bead (diameter 0.5mm, sodium quartz glass) that wherein adds as decentralized medium, under discharge-amount is the condition of 55cc/ minute, high revolution (3400rpm) and cooling, make sand mill work 15 minutes afterwards, obtain dye dispersion liquid.
Use laser diffraction formula particle size distribution device (Shimadzu Seisakusho Ltd.'s system, SALD-2200) to estimate the average grain diameter of the dye granule in the dye dispersion liquid of gained.Evaluation result sees Table 1 and Fig. 1.
B. the making of the aqueous liquid dispersion of developer
Developer: 100 parts of bisphenol Ss (Japanese Cao Da system, D-8)
50 parts of dispersant: PVA (KURARAY system, PVA-203)
Defoamer: 2,4,7,9-tetramethyl-5-decine-4,0.5 part of 7-glycol (Air Products system, SURFYNOL 104E)
Decentralized medium: 225 parts of distilled water
At first, above-mentioned developer, dispersant, defoamer and decentralized medium are dropped in the beaker, stirred in advance 15 minutes.Next, same with the manufacturing of above-mentioned dye dispersion liquid, use sand mill and bead that the solution in the beaker is carried out dispersion treatment, obtain developer dispersion.
(2) making of powder mixture for thermal recording material
Use disc type spray dryer (the former processing mechanism in great river, L-8 type), will (1) in dye dispersion liquid of making and developer dispersion spray-drying under 120 ℃ inlet temperature respectively, obtain dye powder and developer powder.
Next, dye powder and the developer powder that obtains mixed with weight ratio at 1: 2, obtain powder mixture for thermal recording material.
(3) making of thermal recording medium coating fluid
Use Three-One Motor that the mixture of powders of making in 9 parts (2), 10 parts of calcium carbonate powders as filler, 3 parts of PVA as aqueous binder (KURARAY system, PVA-117) and 78 parts of distilled water as decentralized medium were mixed 30 minutes, mixture of powders is scattered in the distilled water again, obtains the thermal recording medium coating fluid.
Place the coating fluid of gained, after about 1 hour, with this coating fluid directly with about 10g/m
2The coating weight hardened coating on commercially available heat-sensitive paper (KOKUYO system, TAI-2010) surface, use beam splitting type leucometer (Japanese electric look industry system, PF10) to estimate the whiteness (based on the ISO whiteness of ISO2470) of coated face.Evaluation result sees Table 1.
In addition, use propeller-type mixer (Jiao
ペ ラ) (revolution is 200rpm) mixes dye powder and 80 parts of distilled water as decentralized medium of making in 20 parts (2), and dye powder is disperseed again, estimates the average grain diameter of the dye granule after disperseing again.Use above-mentioned laser diffraction formula particle size distribution device in the evaluation.Evaluation result sees Table 1 and Fig. 1.Think that dye granule also has same average grain diameter in the thermal recording medium coating fluid of above-mentioned making.
(4) making of thermal recording medium
Use Mayer Bar with 6g/m
2The coating weight of (being scaled solid constituent) is in the good quality paper (basis weight: 60g/m as base material
2) the middle coating fluid of making of surface-coated (3), afterwards will be all lower dry 1 minute at 100 ℃.Re-use supercalender, with the line pressure of 30kg/cm coated face is carried out surface treatment so that it is level and smooth, obtain electrothermal sensitive recording paper.
The performance (developing sensitivity) of the electrothermal sensitive recording paper of gained is estimated in use with the temperature-sensitive typewriting experimental provision of film head (National Electronics Research Centre's system).Particularly, be 0.45W/ point 1 line, writing time to be that 20 milliseconds/line, scanning density are under the typewriting condition of 8 * 385 points/mm at head electric power, the pulse width of the electric power of supplying with magnetic head is changed in 0.0～1.2 millisecond scope, coated face (heat sensitive recording layer) typewriting at the electrothermal sensitive recording paper of making, use Macbeth densimeter RD914 to measure typewriting concentration, obtain concentration by calculating and reach 1.0 pulse width (millisecond).This pulse width is less, more can realize at short notice dense typewriting, the sensitivity of heat sensitive recording layer (thermo-responsive) height.Evaluation result sees Table 1 and Fig. 1.
(embodiment 2～5, comparative example 1～2)
The consumption of the dispersant (PVA) that uses except will make dye dispersion liquid and developer dispersion the time changes to the value shown in the table 1, carry out the operation identical with embodiment 1, make dye dispersion liquid, developer dispersion, powder mixture for thermal recording material, thermal recording medium coating fluid and electrothermal sensitive recording paper.In addition, carry out the evaluating characteristics identical with embodiment 1.Evaluation result sees Table 1 and Fig. 1.
(embodiment 6)
The mixture of powders of making in 25 ℃ of lower keeping embodiment 1 they (2) 3 days uses this mixture of powders afterwards, similarly makes later electrothermal sensitive recording paper with embodiment 1 they (3).Use beam splitting type leucometer (Japanese electric look industry system, PF10) to estimate the ISO whiteness of the coated face (heat sensitive recording layer) of the electrothermal sensitive recording paper of making.Carry out the operation identical with embodiment 1, estimate the performance (developing sensitivity) of the electrothermal sensitive recording paper of making.Evaluation result sees Table 2.
(comparative example 3)
Dye dispersion liquid and the developer dispersion made among the embodiment 1 it (1) are mixed with weight ratio 1: 2 (being scaled solid constituent), make the thermal recording medium coating fluid.The coating fluid that keeping is made under 25 ℃ 3 days uses this coating fluid afterwards, similarly makes later electrothermal sensitive recording paper with embodiment 1 they (4).Use beam splitting type leucometer (Japanese electric look industry system, PF10) to estimate the ISO whiteness of the coated face (heat sensitive recording layer) of the electrothermal sensitive recording paper of making.In addition, carry out the operation identical with embodiment 1, estimate the performance (developing sensitivity) of the electrothermal sensitive recording paper of making.
Evaluation result sees Table 2.
[table 1]
[table 2]
Such as table 1 and shown in Figure 1, with respect to comparative example 1,2, the developing sensitivity of the electrothermal sensitive recording paper of making among the embodiment 1～5 is high, can obtain highly sensitive thermal recording medium.In the consumption of dispersant was 4 parts comparative example 1, the average grain diameter of dye granule was large when making dye dispersion liquid, further enlarges markedly by disperseing this particle diameter again.The decline of the whiteness of gained coating fluid is also large.And in the consumption of dispersant was 160 parts comparative example 2, average grain diameter and the embodiment of dye granule were same degree when making dye dispersion liquid, but by disperseing again this particle diameter obviously to increase.Need to prove, as shown in Figure 1, in an embodiment, the consumption of dispersant is 40～80 parts scope, wherein when 50～80 parts scope, can suppress especially to disperse again the increase of the average grain diameter of rear dye granule, particularly in the consumption of dispersant is 50 parts embodiment 1, even by disperseing, the average grain diameter of dye granule also becomes again.
As shown in table 2, the electrothermal sensitive recording paper that uses powder mixture for thermal recording material of the present invention to make, although be latter made through certain hour by this mixture of keeping, but compare with the electrothermal sensitive recording paper that the mixture before using keeping is made, not only developing sensitivity is not even whiteness confirms reduction yet.
The present invention only otherwise break away from its intention and substantive characteristics, also applicable to other embodiments.Disclosed embodiment describes in all respects in this specification, is not limited to this.Scope of the present invention is not to show by above-mentioned explanation, but shows by the claim of enclosing, and belongs in all changes with the meaning of claim equalization and scope all are included in.
Industrial applicability
Powder mixture for thermal recording material storage stability of the present invention is high, even also can obtain highly sensitive thermal recording medium after circulation, keeping.In addition, this mixture of powders is difficult for occuring painted, even also can obtain the high coating fluid of whiteness and thermal recording medium after circulation, keeping.And, owing to be mixture of powders, so operability, transporting are excellent.Powder mixture for thermal recording material of the present invention can be used for various thermal recording mediums.
Claims (5)
1. powder mixture for thermal recording material, wherein contain:
Dye powder, the dried dye dispersion liquid obtains, and described dye dispersion liquid contains dye granule and dispersant, and with respect to the above-mentioned dye granule of 100 weight portions, the content of above-mentioned dispersant is 5～150 weight portions; And
The developer dispersion that developer powder, drying contain developer particle and dispersant obtains.
2. powder mixture for thermal recording material claimed in claim 1, wherein, above-mentioned dye powder and above-mentioned developer powder are respectively with above-mentioned dye dispersion liquid and above-mentioned developer dispersion spray-drying and the powder that obtains.
3. powder mixture for thermal recording material claimed in claim 1, wherein, in the above-mentioned developer dispersion, with respect to the above-mentioned developer particle of 100 weight portions, the content of above-mentioned dispersant is 5～150 weight portions.
4. powder mixture for thermal recording material claimed in claim 1, wherein, in above-mentioned dye dispersion liquid and the above-mentioned developer dispersion, with respect to the above-mentioned dye granule of 100 weight portions and above-mentioned developer particle, the content of above-mentioned dispersant is 40～80 weight portions respectively.
5. the preparation method of powder mixture for thermal recording material, this preparation method is as follows:
With the dye dispersion liquid spray-drying, form dye powder, dye dispersion liquid contains dye granule and dispersant, and with respect to the above-mentioned dye granule of 100 weight portions, the content of above-mentioned dispersant is 5～150 weight portions;
The developer dispersion spray-drying that will contain developer particle and dispersant forms the developer powder;
Mix established above-mentioned dye powder and above-mentioned developer powder.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008-176594 | 2008-07-07 | ||
| JP2008176594 | 2008-07-07 | ||
| PCT/JP2009/062329 WO2010004970A1 (en) | 2008-07-07 | 2009-07-06 | Powder mixture for thermal recording material, coating fluid for thermal recording material, thermal recording material, and process for producing powder mixture for thermal recording material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102089154A CN102089154A (en) | 2011-06-08 |
| CN102089154B true CN102089154B (en) | 2013-05-29 |
Family
ID=41507083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200980127085.7A Expired - Fee Related CN102089154B (en) | 2008-07-07 | 2009-07-06 | Powder mixture for thermal recording material, and process for producing powder mixture for thermal recording material |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP5188577B2 (en) |
| CN (1) | CN102089154B (en) |
| TW (1) | TW201002537A (en) |
| WO (1) | WO2010004970A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111269709B (en) * | 2020-01-19 | 2023-06-20 | 福建省长汀金龙稀土有限公司 | Rare earth reversible thermochromic material and preparation method and application thereof |
| CN115230360B (en) * | 2022-07-08 | 2024-03-12 | 广东冠豪新材料研发有限公司 | Thermosensitive imaging coating liquid and application thereof in thermosensitive recording material |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101143529A (en) * | 2006-09-15 | 2008-03-19 | 株式会社理光 | Heat-sensitive recording material |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58179691A (en) * | 1982-04-13 | 1983-10-20 | Nippon Synthetic Chem Ind Co Ltd:The | Heat-sensitive recording material |
| JPH02293315A (en) * | 1989-04-28 | 1990-12-04 | Sony Corp | Clay mineral complex and production thereof |
| JPH05297627A (en) * | 1992-04-20 | 1993-11-12 | Fujitsu Ltd | Erasable recording material |
| JPH0848076A (en) * | 1994-08-04 | 1996-02-20 | Kuraray Co Ltd | Heat-sensitive recording material |
| JPH11321103A (en) * | 1998-05-13 | 1999-11-24 | Nippon Synthetic Chem Ind Co Ltd:The | Thermal recording medium |
-
2009
- 2009-07-06 JP JP2010519776A patent/JP5188577B2/en not_active Expired - Fee Related
- 2009-07-06 WO PCT/JP2009/062329 patent/WO2010004970A1/en active Application Filing
- 2009-07-06 CN CN200980127085.7A patent/CN102089154B/en not_active Expired - Fee Related
- 2009-07-07 TW TW98122885A patent/TW201002537A/en unknown
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101143529A (en) * | 2006-09-15 | 2008-03-19 | 株式会社理光 | Heat-sensitive recording material |
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2010004970A1 (en) | 2012-01-05 |
| JP5188577B2 (en) | 2013-04-24 |
| CN102089154A (en) | 2011-06-08 |
| TW201002537A (en) | 2010-01-16 |
| WO2010004970A1 (en) | 2010-01-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0980028B1 (en) | Erasable image forming material | |
| WO2014142014A1 (en) | Color-fadable water-based ink composition | |
| CN100403171C (en) | Imaging material capable of eliminating picture | |
| CN102089154B (en) | Powder mixture for thermal recording material, and process for producing powder mixture for thermal recording material | |
| EP0428994B1 (en) | Method for preparing aqueous dispersion of developer and pressure-sensitive recording paper | |
| KR20080048519A (en) | Thermal recording material | |
| JPH05286233A (en) | Developer composition, aqueous suspension and developing sheet for pressure-sensitive copy paper using them | |
| JP2889237B2 (en) | Method for producing aqueous dispersion of developer for pressure-sensitive copying paper | |
| JP2824343B2 (en) | Developer composition, method for producing aqueous dispersion thereof, and pressure-sensitive copying paper | |
| JPH0471893A (en) | Manufacture of coating solution for thermal recording material | |
| JP2843662B2 (en) | Developer composition and pressure-sensitive recording paper | |
| JP2885466B2 (en) | Method for producing aqueous developer and pressure-sensitive copying paper | |
| JP3954056B2 (en) | Method for adjusting background hue of thermosensitive coloring layer and thermosensitive recording medium | |
| JPH061062A (en) | Manufacture of developer-coated sheet | |
| JP3012349B2 (en) | Developer composition and pressure-sensitive recording paper | |
| JP4313249B2 (en) | Method for producing thermal recording medium | |
| JP4408234B2 (en) | Method for producing thermal recording medium | |
| JP3019163B2 (en) | Developer composition, method for producing aqueous dispersion thereof, and pressure-sensitive copying paper | |
| JPH0159914B2 (en) | ||
| JPH03202388A (en) | Manufacture of water dispersed liquid of coloring agent for pressure-sensitive copying sheet | |
| JPS62195040A (en) | Production of aqueous suspension of polyvalent metallized salicylic acid resin | |
| JPH09248963A (en) | Preparation of developer water dispersion liquid | |
| JP2007076371A (en) | Thermal recording medium and texture hue adjusting method for thermal coloring layer of the same | |
| KR20000024154A (en) | Polyvalent metal salts of salicylic acid resin and processes for the preparation thereof | |
| JPH061061A (en) | Storing method for developer-composition aqueous dispersion |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130529 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |