CN101353495B - Aqueous ink for inkjet - Google Patents
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- CN101353495B CN101353495B CN2008101345564A CN200810134556A CN101353495B CN 101353495 B CN101353495 B CN 101353495B CN 2008101345564 A CN2008101345564 A CN 2008101345564A CN 200810134556 A CN200810134556 A CN 200810134556A CN 101353495 B CN101353495 B CN 101353495B
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Abstract
The present invention provides an aqueous ink for an inkjet, comprising a pigment, a water-soluble organic solvent A, a water-soluble organic solvent B, and water, wherein the water-soluble organic solvent A comprises at least one of diglycerol and polyglycerol, and the water-soluble organic solvent B comprises a polyethylene glycol monoalkyl ether represented by a general formula (1): RO-(CH2CH2O)n-H (wherein, R represents an alkyl group of 4 to 6 carbon atoms, and n represents an integer from 4 to 6).
Description
The interleave reference of related application
The application is based on the No.2007-196385 of Japanese patent application formerly that submitted on July 27th, 2007, and the No.2008-109064 of Japanese patent application formerly that submitted on April 18th, 2008, and requires the right of priority of this application; Its whole content imports as a reference at this.
Technical field
The present invention relates to aqueous ink for inkjet.
Background technology
The ink-vapor recording system is from the high liquid ink of minute nozzle jet flow and makes it attached on the recording mediums such as paper and the printing system of printing.This system have can with less expensive device at a high speed and low noise ground print the feature of high resolving power, high quality images, popularized rapidly recently.
From obtaining the viewpoint of high-quality print at an easy rate, China ink is popularized for the China ink of water-based type.Aqueous ink is to have following feature by containing the China ink that moisture improves drying property, comparing with the oiliness China ink: even also be difficult to print through (ink penetration is to the situation of recording medium the inside), literal favorable reproducibility at the two-face printing of common paper.The colorant of this aqueous ink is broadly divided into dyestuff and pigment 2 kinds, but because pigment inks has good photostabilization and water tolerance, thereby popularized rapidly.
Problem when being printed onto on the common paper as the use aqueous ink can list curling (protruding curling) phenomenon, wrinkling (fluctuating) phenomenon.This is for being the infiltration of paper fibre owing to aqueous ink to recording medium, and interfibrous hydrogen bond is cut off, paper expands and the phenomenon of generation.
Patent documentation 1 (TOHKEMY 2005-220296 communique) discloses a kind of aqueous ink for inkjet, it has following feature: comprise the solvent that possesses particular surface tension force, viscosity and vapour pressure, can improve record-header ejection, take off lid adaptability (decapping properties), have excellent anti-print through, text quality, crimp property.
Patent documentation 2 (Japanese kokai publication hei 10-130550 communique) discloses a kind of aqueous ink for inkjet; it is the China ink that is suitable for multicolor printing; the inferior ethanoyl glycol (acetylene glycol) of lower alkyl ether, nonionic and glycerine or the specific polyalcohols that comprise water, dyestuff, polyvalent alcohol, the anti-ability excellence of curling.
Summary of the invention
, according to inventor's etc. research, in the technology of patent documentation 1, particularly using under the black situation of pigment as colorant, storage stability is inferior, imports in printing ink gun under the black situation of also placing, nozzle easily stops up, and places on the performance at ink gun to have problems.
The technology of patent documentation 2 is a kind of dye ink, and it is based on the material of following technological thought: penetrating solvent composition in recording medium remains on this solvent composition in the recording medium and the moisture evaporation that suppresses in the China ink is curled preventing., when placing print for a long time, moisture can evaporate, and produces hydrogen bond, paper contraction between the fiber of paper once more, has the problem of the state that becomes recessed curling (curling of the opposite side when expanding with paper).
Thereby problem of the present invention provides the water-based paint China ink that a kind of ink-jet is used, and it can suppress curling, and has excellent storage stability and ink gun placement performance.
The present invention relates to aqueous ink for inkjet, this aqueous ink for inkjet comprises pigment, water-miscible organic solvent A, water-miscible organic solvent B and water, wherein, aforementioned water-miscible organic solvent A comprises at least a kind in Glycerol dimer and the Polyglycerine, and aforementioned water-miscible organic solvent B comprises general formula (1): RO-(CH
2CH
2O)
nPolyalkylene glycol monoalkyl ether shown in the-H, in the formula (1), R is the alkyl of carbon number 4～6, n is 4～6 integer.
Another the present invention relates to a kind of print, and it uses the aqueous inkjet ink print of the invention described above and obtains.
Embodiment
The present invention is aqueous ink for inkjet (following only be called " China ink ".), it is characterized in that it comprises pigment, water-miscible organic solvent A, water-miscible organic solvent B and water, aforementioned water-miscible organic solvent A comprises at least a kind in Glycerol dimer and the Polyglycerine, and aforementioned water-miscible organic solvent B comprises general formula (1): RO-(CH
2CH
2O)
nPolyalkylene glycol monoalkyl ether shown in the-H, in the formula (1), R is the alkyl of carbon number 4～6, n is 4～6 integer.
Promptly, the present invention can provide a kind of aqueous inkjet pigment inks, it is characterized in that, this aqueous inkjet pigment inks comprises in Glycerol dimer and the Polyglycerine at least a kind and specific polyalkylene glycol monoalkyl ether as organic solvent, wherein, by being this formation, this aqueous inkjet pigment inks can suppress to curl, sheet carrying is good, and storage stability and ink gun placement excellent performance.
Technical scheme of the present invention is characterised in that, high polar water-miscible organic solvent A, low polar water-miscible organic solvent B are used in combination.Discoveries such as contriver: place the viewpoint of performance from improving storage stability and ink gun, be necessary to use high polar solvent, from the drying that promotes print, prevent the viewpoint of curling, it is effective using the few solvent of amount of moisture (water absorbability) that is kept as high polar solvent.Moreover find that by the combination low polar solvent dissolution equilibrium of the paper surface China ink system when printing is destroyed, low polar solvent separates rapidly with water, so moisture stays paper surface and easily dry, can be prevented curling effect.
From such viewpoint, water-miscible organic solvent A is preferably polyglycerine or polyvalent alcohol, and water-miscible organic solvent B is preferably rudimentary (carbon number 3～6) alkyl oxide series solvent of polyvalent alcohol.
Moreover from the viewpoint that ink gun is placed performance, continuous discharge performance and storage stability, water-miscible organic solvent A and B are preferably boiling point at the high boiling solvent more than 200 ℃.The boiling point of two solvents is more preferably more than 250 ℃.
From the viewpoint of the solubleness of solvent, polarity can be used the α value representation.In the present invention, water-miscible organic solvent A be the α value at the solvent more than 65, be preferably the α value at the solvent more than 70.Water-miscible organic solvent B is the solvent of α value less than 65, is preferably the α value at the solvent below 55.
The α value is meant the value with tan α (=inorganic value/organic value) expression.At this, in the characteristic that is proposed by Tentianmu to use in " organic conceptional diagram ", it is divided into following 2 factors with organic compound, and respectively it is quantized " inorganic value " and " organic value ".Wherein 2 factors are: result from " organic property " (covalent linkage) of covalent linkage chain in its carbon field; And, influence " inorganic nature " (ionic bond) of bringing by the static behaviour that is present in substituting group (functional group).That is, " inorganic value " and " organic value " is to be tried to achieve by the structure of each organic compound etc., and both ratios are that the α value is for representing " inorganic nature " of compound and the equilibrated value of " organic property " quantitatively.Be described in detail in the study (1974) etc. between " organic qualitative analysis of system (mixture volume) " wind of Tentianmu work relevant for the item of " organic conceptional diagram ".
In the China ink of the present invention,, comprise at least a kind in Glycerol dimer and the Polyglycerine as water-miscible organic solvent A.Discoveries such as the inventor: about the amount of moisture (water absorbability) that water-miscible organic solvent A is kept, specifically, preferred relative humidity is that 50% o'clock equilibrium water component is below 15%, and relative humidity is that 80% o'clock equilibrium water component is below 35%.As solvent, select Glycerol dimer and Polyglycerine with such characteristic.From suppressing the viewpoint of curling effect, Polyglycerine is the material of molecular weight more than 300 more preferably.
Water-miscible organic solvent A as being used in combination with Glycerol dimer and Polyglycerine can list ethylene glycol, Diethylene Glycol, triethylene glycol, tripropylene glycol, glycerine, 1,2,4-trihydroxybutane, 1,2,6-hexanetriol, 1,2,5-penta triol, 1,2-butyleneglycol, 1,3 butylene glycol, 1,4-butyleneglycol, 1, ammediol, monoethanolamine, diethanolamine, trolamine etc. can be used in combination these multiple classes.
When these were used in combination, the Glycerol dimer among the water-miscible organic solvent A and/or the ratio of Polyglycerine were preferably more than the 75 quality %, more preferably more than the 90 quality %.
As water-miscible organic solvent B, be necessary to comprise at least RO-(CH
2CH
2O)
nPolyalkylene glycol monoalkyl ether shown in the-H, in the formula (1), R is the alkyl of carbon number 4～6, n is 4～6 integer.Repeat number n is 3 when following, discharge performance reduces, n is 7 when above, the dried paper deformation quantity of China ink may increase, the carbon number of alkyl R is 3 when following, just printing back and black dried paper deformation quantity increase, and the carbon number of R is 7 when above, by the viscosity increase of China ink and cause discharge performance and storage stability to reduce.Alkyl R can be side chain, but is preferably straight chain.
Specifically, can list TEG monobutyl ether, TEG monopentyl ether, TEG monohexyl ether, five ethylene glycol monobutyl ether, five ethylene glycol monopentyl ether, five ethylene glycol monohexyl ether, six ethylene glycol monobutyl ethers, six glycol monomethyl amyl ethers, six ethylene glycol ethers.
Wherein, the R that preferably comprises above-mentioned formula (1) is that butyl, n are 4 TEG monobutyl ether.
Water-miscible organic solvent B as being used in combination with above-mentioned polyalkylene glycol monoalkyl ether for example can list:
Ethylene glycol monoalkyl ether class (for example: ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether etc.);
Diethylene Glycol monoalkyl ethers (for example: diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether etc.);
Triethylene glycol monoalkyl ethers (for example: triethylene glycol monomethyl ether, Triethylene glycol ethyl ether, triethylene glycol butyl ether etc.);
Propylene-glycol monoalky lether class (for example: propylene glycol monomethyl ether, dihydroxypropane single-ether, propylene glycol monobutyl ether etc.);
Dipropylene glycol monoalkyl ethers (for example: dipropylene glycol monomethyl ether, dipropylene glycol list ether, dipropylene glycol monobutyl ether etc.);
Tripropylene glycol monoalkyl ethers (for example: tripropylene glycol monomethyl ether, tripropylene glycol list ether, tripropylene glycol monobutyl ether etc.);
Also these can be used in combination more than 2 kinds.Wherein, preferably diethylene glycol monobutyl ether, triethylene glycol butyl ether, dipropylene glycol monomethyl ether etc. are used in combination.
When these solvents were used in combination, the ratio of the polyalkylene glycol monoalkyl ether of the above-mentioned formula (1) among the water-miscible organic solvent B was preferably more than the 50 quality %.Moreover the ratio of the TEG monobutyl ether among the water-miscible organic solvent B also is preferably more than the 50 quality %.
Place viewpoints such as performance, China ink ejection property from storage stability, the ink gun of China ink, the content of water-miscible organic solvent A is preferably 2～25 quality % in the China ink, more preferably 3～20 quality %.No matter this content is too much still very few, all is difficult to avoid black viscosity increase or is difficult to make black viscosity optimization.
Usually, the storage stability that (reaches about 15 quality %) China ink that comprises low polar solvent (water-miscible organic solvent B) in large quantities in China ink has the tendency of extreme reduction, but by comprising this high polar solvent (water-miscible organic solvent A) slightly, can make the pigment-dispersing stabilization, improve the storage stability of China ink.
From the viewpoint that suppresses to curl, prevent that black viscosity from increasing, the content of water-miscible organic solvent B is preferably 15～45 quality % in the China ink, more preferably 20～40 quality %.
The content of Mo Zhongshui is preferably 30～80 quality %, and more preferably 40～70 quality % most preferably are 45～60 quality %.As water, preferably use pure water or ultrapure waters such as ion exchanged water, distilled water.
As pigment, for example can use the pigment dyestuff (bright fuchsin 6B, Lake red C, Wo Qiuge are red, dual-azo yellow, organic yellow, phthalocyanine blue, phthalocyanine green, alkali blue, nigrosine etc.) of azo system, phthalocyanine system, dyestuff system, condensation polycyclic system, nitro system, nitrous base system etc.; Carbon black classes such as mineral dyes such as the metal species of cobalt, iron, chromium, copper, zinc, lead, titanium, vanadium, manganese, nickel etc., metal oxide and sulfide and reddish brown Huang, ultramarine, deep red indigo plant, furnace treated black, dim, acetylene black, thermally oxidized black.These pigment can use any separately, in addition, also can be used in combination more than 2 kinds.
Moreover, preferably use from pigment dispersion, should can import the wetting ability functional group in surface of pigments by physical or chemical treatment from pigment dispersion.As the wetting ability functional group that imports to from pigment dispersion, be preferably and have ionic material, surface of pigments is charged to be anionic property or cationic by making, thereby can granules of pigments stably be dispersed in the water by electrostatic repulsion forces.As the anionic property functional group, be preferably sulfonic group, carboxyl, carbonyl, hydroxyl, phosphate etc.As the cationic functional group, be preferably quaternary ammonium group, quaternary phosphine base etc.
These wetting ability functional groups can directly combine with surface of pigments, also can be by other atomic group combination.As other atomic group, can list alkylidene group, phenylene, naphthylidene etc., but be not limited to these.As the treatment process of surface of pigments, can list diazotization processing, sulfonation processing, hypochlorous acid processing, humic acids processing, vacuum plasma processing etc.
The use level of the pigment that is comprised in the China ink (solids component) is preferably about 0.1～25 quality %, more preferably 1～20 quality %, most preferably be 5～15 quality %.
The adaptability scope of the viscosity of China ink is according to the nozzle diameter of ink gun, ejection environment etc. and different, is preferably about 1～30mPas under 23 ℃ usually, 5～15mPas more preferably, then is suitable for use in the ink-jet recording device purposes about about 10mPas.At this, viscosity table is shown under 23 ℃, with the speed of 0.1Pa/s with the value of shear-stress when 0Pa is increased to 10Pa.
In the scope that does not hinder the object of the invention, can in China ink, comprise various additives commonly used in this field as required.
Specifically, can in China ink, contain the tensio-active agent of anion surfactant, cats product, amphoterics, nonionogenic tenside or macromolecular, silicone-based, fluorine system as pigment dispersing agent, defoamer, surface tension reducting agent etc.
In order to adjust the viscosity of China ink, can in China ink, cooperate ionogen.As ionogen, for example can list sodium sulfate, potassium hydrogen phosphate, Trisodium Citrate, soluble tartrate, Sodium Tetraborate, can will be used in combination more than 2 kinds.
In order to regulate the PH of China ink, also can add known PH conditioning agent, sulfuric acid, nitric acid, acetic acid, sodium hydroxide, potassium hydroxide, ammonium hydroxide, trolamine etc. can be used as the PH conditioning agent and use, or can be used as the tackifying assistant use of China ink.
By cooperating antioxidant, can prevent the oxidation of black composition, the storage stability of raising China ink.As antioxidant, can use for example L-xitix, L-sodium ascorbate, SODIUM ISOVITAMIN C, potassium sulfite, S-WAT, Sulfothiorine, V-Brite B, Sodium Pyrosulfite.
By cooperating sanitas, what can prevent China ink addles, improves storage stability.As sanitas, for example can use 5-chloro-2-methyl-4-isothiazoline-3-ketone, 2-methyl-4-isothiazoline-3-ketone, 2-n-octyl-4-isothiazoline-3-ketone, 1, isothiazolines such as 2-benzisothiazole-3-ketone are sanitas; Six hydrogen-1,3, (2-hydroxyethyl)-triazines such as s-triazine are sanitas to 5-three; Pyridine quinoline such as 2-pyridine sodium mercaptides-1-oxide compound, oxine are sanitas; Dithiocarbamates such as Sodium dimethyldithiocarbamate 40min are sanitas; 2,2-two bromo-3-cyano group propionic acid amides, 2-bromo-2-nitro-1, ammediol, 2,2-two bromo-2-nitroethyl alcohols, 1,2-two bromo-2, organic bromines such as 4-dicyanobutane are sanitas; Methyl p-hydroxybenzoate, ethyl p-hydroxybenzoate, potassium sorbate, sodium dehydroacetate, Whitfield's ointment.
From can further improve the viewpoint of continuous discharge performance, in above-mentioned any composition, preferred China ink comprises the tensio-active agent of particular types.
Kind as tensio-active agent, specifically, carbon numbers such as preferred caproic acid, sad, capric acid, lauric acid are the fatty acid ester of 6～12 lipid acid, are preferably selected from the fatty acid ester more than a kind in the group that polyglycerol fatty acid ester, cithrol and polyoxyethylene sorbitan fatty acid ester formed.The carbon number of lipid acid is than under the 6 little situations, the sufficient surfactivity effect that might can not get expecting because of interpolation.On the other hand, the carbon number of lipid acid may reduce continuous discharge performance on the contrary than under the 12 big situations, and be difficult to be dissolved in the China ink, the stability of China ink reduces.
These fatty acid esters can be monoesters, also can be the fatty acid-esterified polyester more than 2.The polymerization degree of the glycerine in the polyglycerol fatty acid ester is preferably about 6～10.The polymerization degree (EO) of the ethylene glycol in the cithrol (or ethylene oxide) is preferably about 6～25.The polymerization degree (EO) of the ethylene glycol in the polyoxyethylene sorbitan fatty acid ester (or ethylene oxide) is preferably about 6～25.
In more detail, can list mono laurate six glyceryl ester, mono laurate ten glyceryl ester, mono laurate macrogol ester, mono laurate polyoxyethylene sorbitan ester, single sad six glyceryl ester, single sad ten glyceryl ester, single sad macrogol ester, single sad polyoxyethylene sorbitan ester etc.
Content is preferably 0.1～2 quality % in the China ink when comprising above-mentioned fatty acid ester, more preferably 0.3～1.5 quality %.Even the above-mentioned fatty acid ester that is comprised surpasses 2 quality %, not only effect can not get increasing, and can reduce continuous discharge performance on the contrary.
Then, print of the present invention is to use above-mentioned China ink of the present invention and obtains by the ink-jet recording method printing.Ink-jet printer can be arbitrary modes such as piezoelectricity mode, electrostatic means, hot mode, sprays China ink of the present invention based on digitized signal from ink gun, and the black drop that is ejected is adsorbed on the recording medium.
According to the present invention, can effectively prevent to curl and wait paper deformation, therefore have the excellent sheet conveyance, thereby, also can be adapted to 1 minute high speed printing of 120.Moreover by the storage stability (ink gun placement performance) and the continuous discharge performance that improve China ink, China ink of the present invention can preferably be used in the ink-jet printer of line ink gun (line head) mode.
Embodiment
Below, be described in more detail the present invention by embodiment, but the present invention is not limited to these.Below, " quality % " only is designated as " % ", " mass parts " only is designated as " part ".
＜embodiment and comparative example 〉
With the modulation of the composition shown in table 1～table 3 China ink.Employed composition such as following.
Pigment " CAB-O-JET300 " (carbon black, Cabot Corporation)
Glycerol dimer (this pharmaceutical industries of slope Co., Ltd.)
Polyglycerine " #750 " (hydroxyl value 870～910, this pharmaceutical industries of slope Co., Ltd.)
Glycerine (Wako Pure Chemical Industries, Ltd.)
Polyoxyethylene glycol " #200 " (Wako Pure Chemical Industries, Ltd.)
The TEG monobutyl ether (Kyowa Hakko Chemical Co., Ltd.)
Triethylene glycol butyl ether (Wako Pure Chemical Industries, Ltd.)
Diethylene glycol monobutyl ether (Wako Pure Chemical Industries, Ltd.)
Tripropylene glycol monobutyl ether (Dow Chemical Company)
Tensio-active agent " Surfinol465 " (inferior ethanoyl glycol oxyethane, AirProducts and Chemicals Inc.)
TEA (pH regulator agent, trolamine, Wako Pure Chemical Industries, Ltd.)
Mono laurate six glyceryl ester " NIKKOL Hexaglyn 1-L " (NikkoChemicals Co., Ltd.)
Mono laurate ten glyceryl ester " NIKKOL Decaglyn 1-L " (NikkoChemicals Co., Ltd.)
Single sad ten glyceryl ester " SY-Glyster MCA-750 " (this pharmaceutical industries of slope Co., Ltd.)
Mono laurate macrogol ester " NIKKOL MYL-10 " (EO=10 NikkoChemicals Co., Ltd.)
Mono laurate polyoxyethylene sorbitan ester " RHEODOL TW-L106 " (EO=6 Kao Corporation)
Single tetradecanoic acid six glyceryl ester " NIKKOL Hexaglyn 1-M " (NikkoChemicals Co., Ltd.)
Single tetradecanoic acid ten glyceryl ester " NIKKOL Decaglyn 1-M " (NikkoChemicals Co., Ltd.)
Single oleic acid ten glyceryl ester " NIKKOL Decaglyn 1-O " (NikkoChemicals Co., Ltd.)
Single oleic acid macrogol ester " NIKKOL MYO-10 " (EO=10 NikkoChemicals Co., Ltd.)
Single oleic acid polyoxyethylene sorbitan ester " RHEODOL TW-O 120 " (EO=20Kao Corporation)
Polyoxyethylene lauryl ether sulfuric acid " EMAL 20C " (KaoCorporation)
Lauryl betaine (C
12H
25-N
+(CH
3)
2CH
2COO
-) " AMPHITOL20BS " (Kao Corporation)
＜evaluating characteristics 〉
(1) the paper deformation after the printing just
Having or not of paper deformation after the printing just of use line style ink-jet printer " ORPHIS HC5500 " (Risokagaru Corporation's manufacturing), evaluation.The a part of black path that changes ORPHISHC5500 is so that it can tackle aqueous ink.Paper uses desirable lightweight paper (A4 model, Risokagaru Corporation makes), and per 1 spray volume is 30pL, and whole ground of single face forms full image.Metewand such as following.
A: just can lead to paper after the printing, row's paper is also good
B: just can lead to paper after the printing but row's paper is uneven
C: just the paper obstruction takes place, can not lead to paper in the printing back
(2) the paper deformation after the placement
After similarly forming full image with above-mentioned (1), under 23 ℃ of 50%RH environment, place a week, estimate according to following benchmark.
A: the deformation quantity of print thickness direction is below 5mm, even overlapping print, volume is also little.
B: the deformation quantity of print thickness direction is below 5mm, but during overlapping print, volume is very big.
C: the deformation quantity of print thickness direction is more than 5mm, and during overlapping print, volume is very big.
(3) the placement performance of ink gun
As above-mentioned, in changing the black path of ORPHIS HC 5500 in black path, a part imports China ink, and after placing a week under 45 ℃ of 30%RH environment, spout test is carried out in recovery operation, estimates according to following benchmark.
A: driving voltage is suitable, does not have nozzle to omit, can be since the 1st ejection.
B: driving voltage is suitable, omits but produce several nozzles.
C: do not have the drive voltage range that can normally spray, produce a plurality of nozzles and omit.
(4) continuous discharge performance
The ink gun of ORPHIS HC 5500 is installed to continuous ejection with on the anchor clamps (can install ink gun, can at random set drive condition) arbitrarily.Per 1 spray volume is 42pL, continuous 10 minutes, carry out the ejection of China ink from amount to whole nozzles of 318.Check in 318 nozzles, there are what nozzles that do not spray after 10 minutes, thereby estimate according to following benchmark.Carry out 3 experiments.
A:3 experiment, the nozzle that does not spray all is 0 or 1.
B:3 experiment, the nozzle that does not spray is all below 5.
C:3 experiment, the nozzle that does not spray is all below 20.
D: only 1 experiment, the nozzle that does not spray is just above 20.
(5) storage stability
Under 70 ℃ environment each China ink was placed for 1 week in encloses container, the viscosity of measuring China ink changes, and its measurement result is estimated by following mode.
Viscosity velocity of variation=[(viscosity number after the week * 100)/(initial value of viscosity)]-100 (%)
Viscosity velocity of variation less than 5% be designated as A, the viscosity velocity of variation is at the C that is designated as more than 5%.It is as shown in the table in the lump for above result.
Shown in the China ink of above-mentioned embodiment, a kind of storage stability, the good China ink of ejection property can be provided according to the present invention, use this China ink can suppress the high speed printing of paper deformation.Moreover the China ink of embodiment can be prevented departing from of stop impact position, and, can make ink droplet arrange homogenizing, so also can be preferred for the ink-jet printer of line ink gun mode.
In the China ink of embodiment 1～8, produce a plurality of not jetting nozzles in the spout test continuously, but no problem in the practical application.In the China ink of the embodiment 7～9 that has cooperated specific tensio-active agent, can obtain excellent more continuous discharge performance.Wherein, in embodiment 10～15, in all 3 times experiments, jetting nozzle all is not 0.
Moreover as can be known, the kind of tensio-active agent by the matching surface promoting agent, not only can not improve continuous discharge performance not simultaneously shown in reference example 1～8, and also has situation about reducing.
On the other hand, in comparative example 3 and 4, spout test produces a plurality of not jetting nozzles continuously, in the resulting print, has and hinders the actual thick informal voucher line that uses.
Note,, can carry out many improvement and variation and not break away from novelty of the present invention and favourable characteristics above-mentioned embodiment except above already mentioned those.Therefore, all these improvements and changes are intended to be included in the appending claims.
Claims (7)
1. aqueous ink for inkjet, this aqueous ink for inkjet comprises pigment, water-miscible organic solvent A, water-miscible organic solvent B and water, wherein,
Aforementioned water-miscible organic solvent A comprises at least a kind in Glycerol dimer and the Polyglycerine,
Aforementioned water-miscible organic solvent B comprises general formula (1): RO-(CH
2CH
2O)
nPolyalkylene glycol monoalkyl ether shown in the-H, in the formula (1), R is the alkyl of carbon number 4～6, n is 4～6 integer, and,
The content of aforementioned water-miscible organic solvent A in China ink is 2～25 quality %,
The content of aforementioned water-miscible organic solvent B in China ink is 15～45 quality %.
2. aqueous ink for inkjet according to claim 1, the aforementioned polyethylene glycols monoalky lether comprises the TEG monobutyl ether.
3. aqueous ink for inkjet according to claim 2, the ratio of the TEG monobutyl ether among the aforementioned water-miscible organic solvent B are more than the 50 quality %.
4. aqueous ink for inkjet according to claim 1, aforementioned pigment are self-dispersion type pigment.
5. aqueous ink for inkjet according to claim 1, also comprise fatty acid ester more than a kind, it is the fatty acid ester of 6～12 lipid acid for carbon number and is selected from the group that polyglycerol fatty acid ester, cithrol and polyoxyethylene sorbitan fatty acid ester formed.
6. aqueous ink for inkjet according to claim 5, the content of aforementioned fatty acids ester in China ink are 0.1～2 quality %.
7. print, it uses each described aqueous inkjet ink print of claim 1～6 and obtains.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007196385 | 2007-07-27 | ||
| JP2007-196385 | 2007-07-27 | ||
| JP2007196385 | 2007-07-27 | ||
| JP2008109064A JP5222615B2 (en) | 2007-07-27 | 2008-04-18 | Water-based ink for inkjet |
| JP2008109064 | 2008-04-18 | ||
| JP2008-109064 | 2008-04-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101353495A CN101353495A (en) | 2009-01-28 |
| CN101353495B true CN101353495B (en) | 2011-11-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101345564A Active CN101353495B (en) | 2007-07-27 | 2008-07-25 | Aqueous ink for inkjet |
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| JP (1) | JP5222615B2 (en) |
| CN (1) | CN101353495B (en) |
Families Citing this family (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5247256B2 (en) * | 2008-06-24 | 2013-07-24 | 富士フイルム株式会社 | Inkjet recording liquid |
| JP2011011492A (en) * | 2009-07-03 | 2011-01-20 | Ricoh Co Ltd | Inkjet recording method |
| US8349064B2 (en) | 2010-01-29 | 2013-01-08 | Brother Kogyo Kabushiki Kaisha | Water-based ink for ink jet recording |
| US8328927B2 (en) | 2010-01-29 | 2012-12-11 | Brother Kogyo Kabushiki Kaisha | Water-based ink for ink jet recording |
| JP5310581B2 (en) * | 2010-01-29 | 2013-10-09 | ブラザー工業株式会社 | Water-based ink and ink cartridge for inkjet recording |
| JP5825126B2 (en) | 2011-03-14 | 2015-12-02 | 株式会社リコー | Ink jet ink, ink jet recording method, and ink jet recording apparatus |
| JP5942708B2 (en) * | 2011-09-13 | 2016-06-29 | 株式会社リコー | Ink jet ink, ink jet recording method, ink jet recording apparatus, and ink recorded matter |
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| JP2009052018A (en) | 2009-03-12 |
| JP5222615B2 (en) | 2013-06-26 |
| CN101353495A (en) | 2009-01-28 |
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