CN1154985A - Emulsion Ink for Stencil Printing - Google Patents
Emulsion Ink for Stencil Printing Download PDFInfo
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- CN1154985A CN1154985A CN96121861.4A CN96121861A CN1154985A CN 1154985 A CN1154985 A CN 1154985A CN 96121861 A CN96121861 A CN 96121861A CN 1154985 A CN1154985 A CN 1154985A
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Abstract
提供一种有高印刷密度、低渗出性、低模糊性和极好温度稳定性的模版印刷用油包水(W/O)乳化油墨，在水相含有炭黑作为水不溶着色剂，其中所述的炭黑的pH为6～10。所述的炭黑的平均粒度优选为10微米或更小。水相可含有树脂和/或水溶性树脂的水包油(O/W)乳化液，以便提高炭黑在水中的分散性和对印刷品的固定性。油相可不含任何树脂组分。To provide a water-in-oil (W/O) emulsion ink for stencil printing having high printing density, low bleeding, low blurring and excellent temperature stability, containing carbon black as a water-insoluble colorant in the water phase, wherein The pH of the carbon black is 6-10. The average particle size of said carbon black is preferably 10 microns or less. The water phase may contain resins and/or oil-in-water (O/W) emulsions of water-soluble resins in order to improve the dispersibility of carbon black in water and the fixability of prints. The oil phase may not contain any resinous components.
Description
The present invention relates to a kind of emulsified ink for stencilization, more particularly, relate to a kind of have fabulous emulsion stability, high printing density, low ambiguity and low exudative emulsified ink.
By template perforation being made negative, the meshed portion that makes printing ink pass negative then reaches on the goods that will print such as the printing realizes stencilization.Because negative is easy to make, stencilization is widely used.
Traditional emulsified ink for stencilization normally by Bao Shui (W/O) emulsified ink, contains pigment as tinting material in its oil phase, as disclosed in unsettled open (Kokai) No255967/86,14284/89,132777/92 and 117565/93 of Japanese Patent.In case this class W/O emulsified ink is printed on the goods such as printing that will print, at first infiltrate printed matter as emulsion foreign minister's oil phase, be that water as phase in the emulsion infiltrates printed matter and/or evaporates from printed matter then.But the W/O emulsified ink has many shortcomings: because the oil phase of W/O emulsified ink contains pigment, infiltration and drying need considerable time; Be easy to produce fuzzy; And penetrate into dearly in the printing to produce and ooze out.
In order to overcome above-mentioned these shortcomings, the applicant proposes such W/O emulsified ink, and its water contains water-insoluble tinting material, and as unsettled open (Kokai) No of Japanese Patent, 188598/95 is disclosed.But still have any can not be satisfactory: the water-insoluble tinting material that is contained in aqueous phase particularly carbon black usually makes the stability decreases of emulsion.
An object of the present invention is to overcome the above-mentioned shortcoming that contains this class W/O emulsified ink of the insoluble tinting material of water at its aqueous phase, providing a kind of has fabulous emulsion stability, high printing density, low ambiguity and low exudative stencilization to paint with emulsion.
Because to the result of the broad research of above-mentioned purpose, the inventor finds, stencilization is added to the printing ink water with the stability of W/O emulsified ink to be influenced as the sooty pH value of the insoluble tinting material of water, thereby finishes the present invention.
Just, the present invention relates to a kind of like this stencilization, contain carbon black as the insoluble tinting material of water, it is characterized in that described sooty pH value is 6～10 at its aqueous phase with water-in-oil (W/O) emulsified ink.
Therefore carbon black carries out oxide treatment usually in its production process, have acid functional groups in its surface, as carboxyl, carbonyl and have hydroxyl.Sooty pH value changes with the degree of oxide treatment.When the pH value when slightly acidic is to the weakly alkaline scope, in the time of more particularly in 6～10 scopes, the imagination carbon black has a small amount of acidic-group, so emulsion remains under the stable condition, promptly viscosity changes for a short time in long-time, the while carbon black is contained in aqueous phase.On the contrary, when sooty pH value exceeded above-mentioned scope, it is big that the water granularity of emulsion becomes, and emulsion usually is separated into water and oil phase, and promptly emulsion is destroyed, and perhaps carbon black is usually transferred to the oil phase from aqueous phase.Know though the reason of these problems is also imprecise, think that when the carbon black of high polar acidic-group was contained in aqueous phase, carbon black was adsorbed on the interface of emulsion, thereby make the stability decreases of emulsion.
Therefore, it is believed that in the pH value be 6～10, the optimum stabilization of preferred 7-9 times acquisition emulsified inks, wherein carbon black contains polar group seldom, perhaps is not adsorbed onto on the interface of emulsion.
In the W/O emulsified ink, than water higher perviousness and lower surface tension are arranged as foreign minister's oil phase, so oil phase at first infiltrates the goods of printing, water infiltrates the goods of printing again and/or evaporates from printed matter then.In this W/O emulsified ink, stably be present in aqueous phase as the carbon black of water-insoluble tinting material, so carbon black is not easy to infiltrate in the printing by the capillary phenomenon of oil phase.Because oil phase infiltrated the infiltration that has also stoped water in the printing in the past at water, carbon black is tending towards staying the print surface of paper, thereby obtains the printed matter of high printing density, low exudative and low ambiguity.
According to the present invention, tinting material needn't be present in the glossy black oil phase of W/O emulsion, or oil phase needn't contain anyly as the resin of dispersion agent or the fixing agent of tinting material, because carbon black stably remains on aqueous phase, can not transfer in the oil phase.Because oil phase can not resinous shape component, printing ink can be eliminated the dependence of temperature, and therefore can obtain temperature variation is stable printing ink.
The pH value that the present invention uses is that 6～10 carbon black can be easy to select from the various carbon blacks with different methods production, and these production methods do not adopt the over-drastic oxide treatment or do not adopt oxide treatment.On the other hand, can regulate sooty pH value by the degree that changes oxide treatment in process of production.Sooty pH value is pressed JIS (Japanese Industrial Standards) Z8802 regulation, wherein carbon black is added in the water and fully and stirs, and at room temperature measures the pH value of water then.
Carbon black as the water-insoluble tinting material comprises furnace treated black, lamp method carbon black, Shawinigan black, thermally oxidized black etc. in the present invention.By the gross weight of printing ink, the sooty add-on is preferably 1～30% (weight) among the present invention, more preferably 3～10% (weights).The sooty mean particle size is preferably 10 microns or littler, more preferably 3 microns or littler.When mean particle size surpassed 10 microns, glossy black W/O emulsion was tending towards destroying.
Usually, this stencilization can be made of about 10～70% (weight) oil phases and about 90～30% (weight) water with the W/O emulsified ink.
As seen by above-mentioned, water contains water and carbon black, also can contain oil-in-water (O/W) emulsion of resin and/or water soluble resin, improving the dispersion of carbon black in water, and carbon black fixing etc. on goods that will print such as printing.
The example of the O/W emulsion of resin comprises the emulsion of following various resins, as the multipolymer and the urethane of multipolymer, polyvinyl chloride, vinylchlorid and the vinyl acetate of multipolymer, vinylbenzene-butadienecopolymer, vinylidene chloride and the acrylate of multipolymer, polymethacrylate, polystyrene, vinylbenzene and the acrylate of multipolymer, vinyl acetate and the acrylate of polyvinyl acetate (PVA), ethene and vinyl acetate.
The example of water soluble resin comprises polyvinyl alcohol, methylcellulose gum, carboxymethyl cellulose, Natvosol, Polyvinylpyrolidone (PVP), polyethylene and polyvinyl alcohol copolymer, polyethylene oxide, polyvingl ether, polyacrylamide, gum arabic, starch and aqurous ployurethane.
Represent by solid content based on the gross weight of printing ink,, the add-on of the O/W emulsion of resin and water soluble resin is preferably 1～20% (weight), more preferably 2～10% (weights).If consumption is less than 1% (weight), the tinting material component of aqueous phase can not fully be fixed on the goods that will print.If consumption surpasses 20% (weight), when printing ink was stayed on the masterplate for a long time, printing ink formed film in the perforation of masterplate, made by perforation and became difficult.
In addition, water can contain ionogenic surfactant, amphoterics, nonionic surface active agent, and perhaps polymeric, siliceous or fluorizated tensio-active agent are so that improve carbon black wetting, dispersion in water etc.If desired, water also can contain other water-soluble additive, as wetting agent, ionogen, mould inhibitor, antioxidant, water evaporation suppressor, frostproofer etc.
Oil phase can be made of nonvolatile solvent, volatile solvent, emulsifying agent etc., and as mentioned above, because carbon black is present in aqueous phase as tinting material, oil phase can be not resinous.
Can use mineral oil as nonvolatile solvent, as motor oil, spindle oil, machine oil and whiteruss, also can use vegetables oil, as sweet oil, Viscotrol C and salad oil.Can use known mineral oil origin and vegetable oil type solvent as volatile solvent.The ratio of nonvolatile solvent and volatile solvent changes with the blended ratio of oil phase and water, but preferably in 50～95/50～5 weight ratio scopes.
Available emulsifying agent forms W/O emulsion, preferably nonionic surface active agent.As such nonionic surface active agent, can should be mentioned that the sorbitan high-grade aliphatic ester, ethylene oxide adduct as sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, sorbitan tristearate, dehydrated sorbitol mono-fatty acid ester and NOFABLE SO-992 and glycerine monofatty ester, ester fat acid two glyceryl ester and higher alcohols, alkylphenol, lipid acid etc.Simultaneously, because usually containing, the water of this emulsified ink is useful on the tensio-active agent that makes water-soluble tinting material disperse or form the O/W emulsion of above-mentioned resin, preferably suitably select emulsifying agent, so that the W/O emulsion of this printing ink is not destroyed by the tensio-active agent that is present in aqueous phase.
This W/O emulsion printing ink can be easy to for example by above-mentioned water being added in the above-mentioned oil phase, stirring the mixture then its emulsive method be made.
Embodiment
Hereinafter will still, should be appreciated that to the invention is not restricted to these embodiment by preferred work embodiment more detailed description the present invention at present.In following embodiment, term " part " refers to " part is heavy ", unless add explanation in addition.
Embodiment 1～5 and Comparative Examples 1～3
With the listed carbon black of table 1, press the table 2 or the 3 listed formulation carbon dispersive aqueous solution.Therebetween, in the ball mill that 9 millimeters Stainless Steel Balls of diameter are housed, dispersion liquid was disperseed 24 hours.Disperse back sooty granularity also to list table 1 in.
Oil phase by table 2 or 3 listed prescriptions by with each component fusion with stir and prepare.Then, under agitation, the carbon dispersion liquid is added in the oil phase gradually, makes stencilization W/O emulsified ink.
Table one is also listed the sooty pH value of measuring with aforesaid method.The centrifugal particle size measuring instrument CAPA-700 that produces with KabushikiKaisha Horiba Seisakusho measures the sooty mean particle size.
Performance test
With stencil printing apparatus RISOGRApH (registered trademark, RISO KAGAKUCORPORATION makes), carry out stencilization with the printing ink of the foregoing description preparation.Then, (1) according to the following steps～(4), with regard to printing density, exudative, ambiguity and temperature stability, the printed matter that test so obtains, the result lists table 4 in.
(1) printing density: the reflection density that the RD920 instrument of producing with Macbeth company is measured is measured the printing density in the printed matter solids district.
(2) exudative: the identical reflection density of the apparatus measures of usefulness (1) is measured the printing density on the opposite side in printed matter solids district.
(3) ambiguity: with the microscopic printed matter printing ink ambiguity on every side of amplifying 80 times.When observing when seldom fuzzy, the result is with (-) expression in table 4.When observing obvious bluring, the result represents with (+) in the table 4.
(4) temperature stability: the identical reflection density of the apparatus measures of usefulness (1) is measured the printing density in the printed matter solids district that obtains under the low temperature (5 ℃).
Also calculate the viscosity degradation rate and estimate glossy black emulsion stability after placing June under 50 ℃ of constant temperature by following equation.
Viscosity degradation rate=(V1-V2)/V1 wherein, V1 is the viscosity before printing ink is placed, V2 is the viscosity after printing ink is placed, viscosity is measured with the Brookfield viscometer.The result also lists table 4 in.
Table 1 used sooty pH value and mean particle size
PH value mean particle size (micron)
Embodiment 1 7.5 0.15
Embodiment 2 8.0 0.18
Embodiment 3 8.5 0.32
Embodiment 4 7.0 0.12
Embodiment 5 6.0 0.25
Two ratios 1 3.0 0.32
Comparative Examples 2 4.0 0.25
Comparative Examples 3 2.5 0.22
The prescription of table 2 W/O emulsified ink (part is heavy)
Embodiment numbers 12345
Oil phase:
Nonvolatile solvent:
#40 motor oils 13.0 ← ← ← ←
Volatile solvent: 5
#Solvent (Japan National Oil Corporation's production) 5.0 ← ← ← ←
Emulsifying agent: dehydrated sorbitol mono-fatty acid ester 2.0 ← ← ← ←
Water:
The water-insoluble tinting material: furnace treated black 4.0 ← ← ← ←
Water: ion exchanged water 60.0 ← ← ← ←
Dispersion agent: Polyvinylpyrolidone (PVP) 1.0 ← ← ← ←
The O/W emulsion of resin: acrylate (solid content 50%) 10.0 ← ← ← ←
Wetting agent: ethylene glycol 5.0 ← ← ← ←
The prescription of table 3 W/O emulsified ink (part is heavy)
Comparative Examples numbers 123
Oil phase:
Nonvolatile solvent:
#40 motor oils 13.0 ← ←
Volatile solvent: 5
#Solvent (Japan National Oil Corporation's production) 5.0 ← ←
Emulsifying agent: dehydrated sorbitol mono-fatty acid ester 2.0 ← ←
Water:
The water-insoluble tinting material: furnace treated black 4.0 ← ←
Water: ion exchanged water 60.0 ← ←
Dispersion agent: Polyvinylpyrolidone (PVP) 1.0 ← ←
The O/W emulsion of resin: acrylate (solid content 50%) 10.0 ← ←
Wetting agent: ethylene glycol 5.0 ← ←
The result of table 4 embodiment and Comparative Examples
Embodiment 1 embodiment 2 embodiment 3 embodiment 4 embodiment 5 Comparative Examples 1 Comparative Examples 2 Comparative Examples 3 printing densities 1.11 1.13 1.18 1.18 1.15 1.08 1.12 1.11 exudative 0.14 0.12 0.14 0.14 0.13 0.13 0.14 0.12 ambiguities, (-), (-), (-), (-), (-), (-), (-), (-) temperature stability 1.05 1.07 1.10 1.08 1.06 1.00 1.01 1.01 emulsion stabilities 0.11 0.12 0.22 0.15 0.18 0.78 0.56 0.50
Result from table 4 can find, when sooty pH scope 6 to weakly alkaline, even when the printing ink long-term storage, the viscosity of emulsified ink does not descend, and therefore obtains stable emulsion.Also find to have the printed matter that helps to obtain high printing density, low exudative, low ambiguity and fabulous temperature stability at the aqueous phase sooty.
According to the present invention, the pH value is that 6～10 carbon black is used for its water and contains the W/O emulsified ink of carbon black as the insoluble tinting material of water, thereby emulsion is stabilized, even the printing ink long-term storage is not destroyed yet.In addition,, transfer to oil phase hardly,, high printing density is arranged, do not ooze out and blur so printing ink can be dry because carbon black stably is present in aqueous phase.In addition, because tinting material or can not be contained in the oil phase as the resin of dispersion agent or the fixing agent that tinting material is used can obtain not changing the printing ink of viscosity when temperature change.
Claims (4)
1, a kind of stencilization water-in-oil (W/O) emulsified ink, it contains carbon black as the water-insoluble tinting material at aqueous phase, and wherein said sooty pH value is 6～10.
2, according to the emulsified ink for stencilization of claim 1, wherein said sooty mean particle size is 10 microns or littler.
3,, wherein contain oil-in-water (O/W) emulsion of resin and/or water soluble resin at aqueous phase according to the emulsified ink for stencilization of claim 1.
4, according to the emulsified ink for stencilization of claim 1, wherein in oil phase, do not contain any resin Composition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96121861A CN1052499C (en) | 1995-12-05 | 1996-12-04 | Emulsified ink for stencilization |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP339889/95 | 1995-12-05 | ||
| JP7339889A JPH09157571A (en) | 1995-12-05 | 1995-12-05 | Emulsion ink for stencil printing |
| CN96121861A CN1052499C (en) | 1995-12-05 | 1996-12-04 | Emulsified ink for stencilization |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1154985A true CN1154985A (en) | 1997-07-23 |
| CN1052499C CN1052499C (en) | 2000-05-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96121861A Expired - Lifetime CN1052499C (en) | 1995-12-05 | 1996-12-04 | Emulsified ink for stencilization |
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| Country | Link |
|---|---|
| CN (1) | CN1052499C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101151336B (en) * | 2005-03-31 | 2011-05-11 | 阪田油墨株式会社 | Process for producing ink composition for offset printing and ink composition for offset printing produced by said production process |
| CN101142288B (en) * | 2005-03-22 | 2011-05-11 | 阪田油墨株式会社 | Process for producing ink composition for offset printing, and ink composition for offset printing produced by said production process |
| CN103328588A (en) * | 2010-10-28 | 2013-09-25 | 深圳智慧天使投资有限公司 | Water-in-oil emulsion ink composition and use thereof |
| CN114196236A (en) * | 2021-12-10 | 2022-03-18 | 长沙惠科光电有限公司 | High-pigment carbon black and preparation method and application thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5395435A (en) * | 1994-05-04 | 1995-03-07 | Ab Dick Company | Fast drying duplicating ink |
-
1996
- 1996-12-04 CN CN96121861A patent/CN1052499C/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101142288B (en) * | 2005-03-22 | 2011-05-11 | 阪田油墨株式会社 | Process for producing ink composition for offset printing, and ink composition for offset printing produced by said production process |
| CN101151336B (en) * | 2005-03-31 | 2011-05-11 | 阪田油墨株式会社 | Process for producing ink composition for offset printing and ink composition for offset printing produced by said production process |
| CN103328588A (en) * | 2010-10-28 | 2013-09-25 | 深圳智慧天使投资有限公司 | Water-in-oil emulsion ink composition and use thereof |
| CN114196236A (en) * | 2021-12-10 | 2022-03-18 | 长沙惠科光电有限公司 | High-pigment carbon black and preparation method and application thereof |
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| Publication number | Publication date |
|---|---|
| CN1052499C (en) | 2000-05-17 |
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