CN105086668A - Coating liquid for heat-sensitive material protective layers and application thereof - Google Patents
Coating liquid for heat-sensitive material protective layers and application thereof Download PDFInfo
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- CN105086668A CN105086668A CN201510510663.2A CN201510510663A CN105086668A CN 105086668 A CN105086668 A CN 105086668A CN 201510510663 A CN201510510663 A CN 201510510663A CN 105086668 A CN105086668 A CN 105086668A
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Abstract
The invention relates to a coating liquid for heat-sensitive materials and an application thereof. The coating liquid for protective layers comprises the following components: 0.02-5 parts of lubricating agents, 2-10 parts of adhesive, 0.5-10 parts of fillers, 0.5-10 parts of macromolecule resin, 0.001-1 part of antistatic agents, 0.001-5 parts of surfactants and 80-98 parts of water. The coating liquid has the beneficial effects that the lubricating properties of protective films are improved by adopting the lubricating agents in multiple different temperature periods; meanwhile, the fillers are added to the protective films and can play a role of the lubricating agents on the one hand and adsorb the redundant lubricating agents on the other hand to prevent the redundant lubricating agents from polluting printing heads.
Description
Technical field:
The present invention relates to thermo-sensitive material, particularly the protective layer used coating fluid of a kind of thermo-sensitive material, described thermo-sensitive material is the thermal recording medium that hospital or supermarket use.
Background technology:
Along with the development of digital technique, the thermal recording medium that environmental friendliness, production and use are simple, writing speed is fast more and more enters into daily life.Print and generally undertaken by the printer of low moment of torsion, and mostly be portable hand-held type, thermo-sensitive material and printing head have lower matching, and thermal printing head easily pollutes damage printhead with thermo-sensitive material in print procedure, shorten the work-ing life of printhead.Therefore, need very high matching between thermal printing head and thermal recording medium protective membrane, the work-ing life of printhead could be extended.
Conventional method adds single lubricant or releasing agent, as Japanese Patent 2812040 provides a kind of method, adds Zinic stearas and calcium stearate in cuticula, but calcium stearate poor lubricity, Zinic stearas reduces the softening agent patience of thermo-sensitive material; Japanese Patent 3611231 adds montanin wax in cuticula, and Japanese Patent 2000355165 adds the matching that Kano bar wax improves cuticula and printhead in cuticula, but two kinds of waxes belong to natural materials, and its supply can not get ensureing; Japanese Patent 3573833 provides a kind of lubricant lower than 75 DEG C, is heated and becomes liquid state, revert to again solid-state after cooling in print procedure, and the initial lubricating function of cuticula can not get ensureing.Chinese patent 201010248485 provides a kind of method adding oxidized polyethlene wax in cuticula, and one is that oxidized polyethlene wax needs synthesizing in situ, complex procedures, and poor with the matching of printhead.
Summary of the invention
Technical problem to be solved by this invention be overcome prior art defect, a kind of thermo-sensitive material protective layer coating solution is provided, it can ensure the oilness of cuticular layer, can realize again the high matching between cuticula and printhead.
Technical problem of the present invention solves by following technical solution.
A kind of thermo-sensitive material protective layer coating solution; the composition of described coating fluid and mass fraction thereof are: lubricant 0.02-5 part, tackiness agent 2-10 part, filler 0.5-10 part, macromolecule resin 0.5-10 part, antistatic agent 0.001-1 part, tensio-active agent 0.001-5 part, water 80-98 part, and described lubricant is formed by the mix lubricant of more than five kinds fusing points between-60-200 DEG C.
Above-mentioned thermo-sensitive material protective layer coating solution; described lubricant is formed by the mix lubricant of more than five kinds fusing points between-60-150 DEG C; the fusing point of each lubricant is :-60-50 DEG C: 40-80 DEG C: 80-100 DEG C: 100-120 DEG C: 120-150 DEG C, and the blending ratio of the lubricant that each fusing point is corresponding is 1:(0.5-2.0): (1.0-3.0): (0.1-1.0): (0.1-1.0).
Above-mentioned thermo-sensitive material protective layer coating solution, described lubricant is one or more in silicone oil, Zinic stearas, calcium stearate, aluminum stearate, stearic amide, erucicamide, Magnesium Stearate, paraffin wax emulsions or polythene wax emulsion etc.
Above-mentioned thermo-sensitive material protective layer coating solution, described filler is one or more in aluminum oxide, kaolin, calcium carbonate, silicon-dioxide and diatomite.
Above-mentioned thermo-sensitive material protective layer coating solution; described tackiness agent be the polymerization degree more than 1000, one or more mixing in complete alcoholysis polyvinyl alcohol, partial alcoholysis polyvinyl alcohol, silane modified polyethylene alcohol, carboxy-modified polyvinyl alcohol, methyl acetate substituted hydroxy polyvinyl alcohol.
Above-mentioned thermo-sensitive material protective layer coating solution, the lubricant of fusing point-60-70 DEG C is silicone oil, the lubricant of fusing point 70-90 DEG C is paraffin, the lubricant of fusing point 90-110 DEG C is stearic amide, the lubricant of fusing point 110-140 DEG C is Zinic stearas, and fusing point 140-200 DEG C lubricant is polyethylene wax or calcium stearate; Described filler is kaolin and silicon-dioxide after calcining; Described tackiness agent is polyvinyl alcohol.
The present invention also provides a kind of thermo-sensitive material, and the coating layer formed by above-mentioned coating fluid is as protective layer.
Beneficial effect
1. the present invention's combinationally using mainly by the lubricant of interpolation more than five kinds different melting points sections, the protective membrane that the coating solution drying obtained is formed afterwards both can ensure the oilness of cuticular layer, can realize again the high matching between cuticula and printhead.
2. the present invention uses the lubricant of different melting points section and adjusts amount of pigment simultaneously, and pigment can play the effect of lubricant on the one hand, and its many hollow structure can adsorb lubricant unnecessary in print procedure on the other hand, prevents lubricant contamination printhead.
Embodiment
The present invention relates to a kind of thermo-sensitive material protective layer coating solution; comprise following composition: lubricant 0.02-5 part, tackiness agent 2-10 part, filler 0.5-10 part, macromolecule resin 0.5-10 part, antistatic agent 0.001-1 part, tensio-active agent 0.001-5 part, water 80-98 part, described lubricant is formed by the mix lubricant of more than five kinds or five kinds fusing points between-60-200 DEG C.Its principle is according to different print temperature, cuticula surface provides the lubricant of different amount, lubricant a small amount of under realizing low temperature, lubricant more under high temperature, improve the matching between print media and printhead, the pollution that the printhead that can effectively prevent lubricant from too much existing exists at low temperatures or the very few wear problem at high temperature existed of lubricant.
Tackiness agent of the present invention, mainly divergent function and improve coating performance.Tackiness agent is wherein one or more such as starch, Natvosol, gelatin, Sudan Gum-arabic, polyvinyl alcohol, Si modification polyvinyl alcohol, diacetone modified polyvinyl alcohol, phenylethylene/maleic anhydride copolymer ammonium salt, preferably polyethylene alcohol;
Filler of the present invention is mainly mineral dye, and after coating fluid drying and forming-film, the Main Function of filler is the lubrication played between printhead; And in print procedure, absorb the function of excess lubricant.Filler is mainly one or more of calcium carbonate, aluminum oxide, silicon-dioxide, aluminium hydroxide, barium sulfate, marine alga soil, kaolin, aluminum oxide etc., preferred silicon-dioxide and kaolin;
Lubricant of the present invention, mainly prevents the effect that printhead and cuticular layer adhere to.The lubricant of different melting points has :-60-70 DEG C of mainly silicone oil, stearic acid, 70-90 DEG C mainly contains paraffin class, carnauba wax, montanin wax, 90-110 DEG C mainly contains stearic amide, polyethylene wax class, 110-140 DEG C mainly contains Zinic stearas, polyethylene wax class, and 140-200 DEG C is mainly calcium stearate, vinyl bis-stearamides, calcium stearate.Preferred :-60-70 DEG C of preferred silicone oil, 70-90 DEG C of preferred paraffin, 90-110 DEG C of preferred stearic amide, 110-140 DEG C of preferred Zinic stearas, 140-200 DEG C of preferably polyethylene wax.
Antistatic agent of the present invention, mainly prevents from producing electrostatic damage printhead in cuticle coat print procedure.Main electrostatic agent is alkyl phosphate diethanolamine salt, alkyl phosphate diethanolamine salt, stearamidopropyl dimethyl-beta-hydroxyethyl ammonium nitrate, (3-dodecanamide propyl) trimethyl ammonium methyl sulfate salt, trihydroxyethyl methylamine methyl sulfate salt, stearamidopropyl dimethyl-beta-hydroxyethyl ammonium dihydrogen orthophosphate, N, N-hexadecyl ethyl batch sulfovinic acid salt, the quarternary ammonium salt compound of diethanol fatty amines, glyceryl monostearate, monopalmitin, one or more in ECH type static inhibitor, preferably phosphoric acid ester diethanolamine salt.
Macromolecule resin of the present invention, mainly improves the plasticity of cuticular layer.Be mainly in urea-formaldehyde resin, terpolycyantoamino-formaldehyde resin, acid resin, poly-cellulose acetate butyrate, polypropylene ethylene oxide resin, polyvinyl pyrrolidone resin, silicone resin, polyvinyl acetate resin etc. one or several, preferred silicone resin and cellulose acetate butyrate.
9. the tensio-active agent described in, be mainly: stearic acid, oleic acid, lauric acid, sodium lauryl sulphate, dioctyl succinate disulfonate acid, Sodium dodecylbenzene sulfonate, one or more in Sodium glycocholate, benzalkonium chloride, Morpan BB, glyceryl monostearate, sucrose ester, polysorbate, Pluronic F68 and some fluorochemical surfactants, preferably sodium dodecyl sulfate, dioctyl succinate disulfonate acid and trimethyl-glycine.
Preparation method is as follows:
1. prepare lubricant dispersion liquid
Take the lubricant of different melting points respectively, use tackiness agent and tensio-active agent to carry out pre-treatment to lubricant, dispersion, obtains the lubricant dispersion liquid of particle diameter 0.1-5.0 micron.
2. prepare pigment pretreatment fluid
Take different pigment respectively, use tackiness agent to carry out pre-treatment, obtain pigment pretreatment fluid.
3. auxiliary agent pretreatment fluid
Take different auxiliary agents respectively, use tackiness agent to carry out pre-treatment, obtain pigment pretreatment fluid.
4. proportionally above-mentioned pretreatment fluid is mixed, stir, obtain coating fluid.
The present invention is further illustrated below in conjunction with several embodiment.
Embodiment 1
1. prepare lubricant dispersion liquid
Take the lubricant of different melting points respectively, use tackiness agent and tensio-active agent to carry out pre-treatment to lubricant, dispersion, obtains the lubricant dispersion liquid of particle diameter 0.1-5 micron.
Take fusing point at the silicone oil 50 parts of-56 DEG C, high-speed stirring is distributed in the aqueous phase of 500 parts of 3%PVA (Kuraray) and 5 parts of sodium lauryl sulphate mixing, obtains particle diameter less than 0.5 micron, obtains lubricant dispersion liquid A;
Take fusing point at 50 parts, the paraffin (Zhong jing grease) of 70 DEG C, mix with 500 parts of 3%PVA (Kuraray) and 5 parts of trimethyl-glycines, it is less than 0.5 micron that sand milling is distributed to particle diameter, obtains lubricant dispersion liquid B;
Take fusing point at the stearic amide (Zhong jing grease) 50 parts of 100 DEG C, 500 parts of 3%PVA (Kuraray) and 5 parts of sodium lauryl sulphate mixing, being distributed to particle diameter is less than 0.5 micron, obtains lubricant dispersion liquid C;
Take fusing point at the Zinic stearas 50 parts of 120 DEG C, 500 parts of 3%PVA (Kuraray) and 5 parts of sodium lauryl sulphate mixing, it is less than 0.5 micron that sand milling is distributed to particle diameter, obtains lubricant dispersion liquid D;
Take fusing point at the polyethylene wax (Zhong jing grease) 50 parts of 138 DEG C, 500 parts of 3%PVA (Kuraray) and 5 parts of trimethyl-glycines mixing, it is less than 0.5 micron that sand milling is distributed to particle diameter, obtains lubricant dispersion liquid E;
Take fusing point at the calcium stearate 50 parts of 150 DEG C, 500 parts of 3%PVA (Kuraray) and 3 parts of dioctyl succinate disulfonate acids mixing, it is less than 0.5 micron that sand milling is distributed to particle diameter, obtains lubricant dispersion liquid F.
2. prepare pigment pretreatment fluid
Take kaolin (Oji Paper industry) pigment 50 parts, 450 parts of 3%PVA (Kuraray) and 15 parts of trimethyl-glycine mixing, it is less than 0.5 micron that sand milling is distributed to particle diameter, obtain pigment pretreatment fluid A;
Take barium sulfate pigment 50 parts, 450 parts of 3%PVA (Kuraray) and 15 parts of trimethyl-glycine mixing, it is less than 0.5 micron that sand milling is distributed to particle diameter, obtain pigment pretreatment fluid B.
3. auxiliary agent pretreatment fluid
Take silicone resin 5 parts, be dissolved in 50 parts of ethyl acetate and be prepared into oil phase, in the aqueous phase that high speed dispersion is prepared in 450 parts of 3%PVA (Kuraray) and 8 parts of trimethyl-glycines, obtain auxiliary agent pretreatment fluid.
4. the dissolving of tackiness agent
Get polyvinyl alcohol 6g, be dissolved in 100g water, be mixed with the binder solution of 6%.
5. the mixing of coating fluid
Proportionally above-mentioned pretreatment fluid is mixed, stir, after filtration, obtain cuticula coating fluid.Specifically in table 1.
The preparation method of embodiment 2-4 and comparative example 1-2 is with embodiment 1, and change of component lists in table 1.
Table 1
6. coating is dry
Adopted by above cuticula coating fluid the mode of slope stream extrusion coated to coat on heat susceptible coating, after drying, do printing test.
7. printing test
Table 2 lists the evaluation result of embodiment to thermo-sensitive material, the machine of crossing of print, to the abradability of the pollution level of printhead, printhead with reference to following methods evaluation:
Use thermal printer 1601 camera (Lekai production), continuous machine of crossing prints 5000 prints, observes the degree of wear of thermal head, and evaluates according to following benchmark.
Printhead degree of impairment:
△: the degree of wear of thermal head is larger, printing sheet can see obvious scuffing.
Zero: observe some wearing and tearing at thermal head, but scuffing is can't see on printing sheet.
◎: the wearing and tearing almost not observing thermal head, prints on sheet and also can't see scuffing.
Printhead pollution level:
×: printhead has the attachment of big area slag, prints on picture and has cut.
△: there is the attachment of slag printhead local, prints on picture and does not observe cut.
Zero: there is the attachment of micro-slag printhead local, print on picture and do not observe cut.
◎: the attachment not observing slag, prints on picture and does not observe cut.
Cross machine:
×: continuous machine is abnormal excessively, and card, has abnormal sound, print image distortion etc.
√: cross machine normal, have no abnormal sound, print image is normal.
Performance:
×: print performance is abnormal, and character image has exception, and slide mist degree is large;
√: print performance is normal, and character image density is suitable, and slide does not affect transparency.
Table 2 different ingredients is to the stained situation of print performance and printhead
The present invention is provided with the thermo-sensitive material protective layer of band automatic cleaning print head functions; the friction printed between sheet and printhead is reduced by the lubricant adding different melting points; prevent coating from adhering to and pollute thermal printing head, the filler simultaneously added the lubricant of withhold excessive can prevent the pollution of printhead.Embodiments of the present invention are not limited to above-described embodiment, and when not deviating from flesh and blood of the present invention, any simple distortion, replacement all should belong to protection scope of the present invention.
Claims (7)
1. a thermo-sensitive material protective layer coating solution; it is characterized in that; the composition of described coating fluid and mass fraction thereof are: lubricant 0.02-5 part, tackiness agent 2-10 part, filler 0.5-10 part, macromolecule resin 0.5-10 part, antistatic agent 0.001-1 part, tensio-active agent 0.001-5 part, water 80-98 part, and described lubricant is formed by the mix lubricant of more than five kinds fusing points between-60-200 DEG C.
2. coating fluid according to claim 1, it is characterized in that, described lubricant is formed by the mix lubricant of more than five kinds fusing points between-60-150 DEG C, the fusing point of each lubricant is :-60-50 DEG C: 40-80 DEG C: 80-100 DEG C: 100-120 DEG C: 120-150 DEG C, and the blending ratio of the lubricant that each fusing point is corresponding is 1:(0.5-2.0): (1.0-3.0): (0.1-1.0): (0.1-1.0).
3. coating fluid according to claim 2, is characterized in that, described lubricant is one or more in silicone oil, Zinic stearas, calcium stearate, aluminum stearate, stearic amide, erucicamide, Magnesium Stearate, paraffin wax emulsions or polythene wax emulsion etc.
4. coating fluid according to claim 3, is characterized in that, described filler is one or more in aluminum oxide, kaolin, calcium carbonate, silicon-dioxide and diatomite.
5. coating liquid layer according to claim 4, it is characterized in that, described tackiness agent be the polymerization degree more than 1000, one or more mixing in complete alcoholysis polyvinyl alcohol, partial alcoholysis polyvinyl alcohol, silane modified polyethylene alcohol, carboxy-modified polyvinyl alcohol, methyl acetate substituted hydroxy polyvinyl alcohol.
6. coating fluid according to claim 5, is characterized in that, described-60-70 DEG C of lubricant is silicone oil, 70-90 DEG C of lubricant is paraffin, 90-110 DEG C of lubricant is stearic amide, and 110-140 DEG C of lubricant is Zinic stearas, and 140-200 DEG C of lubricant is polyethylene wax or calcium stearate; Filler is kaolin and silicon-dioxide after calcining; Tackiness agent is polyvinyl alcohol.
7. a thermo-sensitive material, is characterized in that, described thermo-sensitive material comprises the protective layer that the coating fluid described in claim 1-6 is formed.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106947577A (en) * | 2017-04-10 | 2017-07-14 | 武汉迪赛鸿印科技有限公司 | A kind of aqueous lubricating liquid for plastic working automobile hot-dip galvanizing sheet steel |
| CN109455953A (en) * | 2018-12-03 | 2019-03-12 | 巨石集团有限公司 | A kind of reinforced polypropylene glass fiber infiltration agent and its preparation method and application |
| CN111304957A (en) * | 2020-03-20 | 2020-06-19 | 广东冠豪高新技术股份有限公司 | Transfer paper coating and preparation method thereof |
| CN112608625A (en) * | 2020-11-26 | 2021-04-06 | 中国乐凯集团有限公司 | Protective layer coating liquid for direct thermal imaging recording material and preparation method and application thereof |
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| CN102040774A (en) * | 2010-12-20 | 2011-05-04 | 深圳市科聚新材料有限公司 | PP (polypropylene) filled masterbatch and method for preparing same |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106947577A (en) * | 2017-04-10 | 2017-07-14 | 武汉迪赛鸿印科技有限公司 | A kind of aqueous lubricating liquid for plastic working automobile hot-dip galvanizing sheet steel |
| CN106947577B (en) * | 2017-04-10 | 2020-01-07 | 武汉迪赛鸿印科技有限公司 | Water-based lubricating liquid for plastic processing of hot-dip galvanized steel plate of automobile |
| CN109455953A (en) * | 2018-12-03 | 2019-03-12 | 巨石集团有限公司 | A kind of reinforced polypropylene glass fiber infiltration agent and its preparation method and application |
| CN109455953B (en) * | 2018-12-03 | 2022-02-01 | 巨石集团有限公司 | Glass fiber impregnating compound for reinforced polypropylene and preparation method and application thereof |
| CN111304957A (en) * | 2020-03-20 | 2020-06-19 | 广东冠豪高新技术股份有限公司 | Transfer paper coating and preparation method thereof |
| CN112608625A (en) * | 2020-11-26 | 2021-04-06 | 中国乐凯集团有限公司 | Protective layer coating liquid for direct thermal imaging recording material and preparation method and application thereof |
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