CN104789063A - Method for preparing compatible ink-jet printing coating - Google Patents
Method for preparing compatible ink-jet printing coating Download PDFInfo
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- CN104789063A CN104789063A CN201510219823.8A CN201510219823A CN104789063A CN 104789063 A CN104789063 A CN 104789063A CN 201510219823 A CN201510219823 A CN 201510219823A CN 104789063 A CN104789063 A CN 104789063A
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Abstract
The invention discloses a method for preparing a compatible ink-jet printing coating. The compatible ink-jet printing coating consists of the following components in parts by weight: 60 parts of acetic acrylic crosslinking microemulsion of which the solid content is 48%, 40 parts of polyvinyl acetate emulsion of which the solid content is 42%, 18 parts of deionized water, 0.08 part of a dispersing agent, 8 parts of extinction powder, 0.1 part of a defoaming agent, 0.3 part of a moistening agent, 0.25 part of a leveling agent and 0.7 part of a whitening agent. The method comprises the following steps: adding deionized water and the dispersing agent into a container, stirring and dissolving for 10 minutes at a low speed, pouring a proper amount of high-strength glass beads, slowly adding the extinction powder, and grinding for at least 2 hours at a high speed; slowly adding the extinction powder suspension obtained from the emulsion, stirring for 30 minutes at a moderate speed, adding the defoaming agent, the moistening agent, the leveling agent and the whitening agent, continuously stirring for 1 hour, filtering by using a filtering net of 300 meshes, leaving to stand to remove foams, and performing ultrasonic foam removal. The invention aims to prepare the compatible ink-jet printing coating which is compatible with different types of printing ink and is good in water resistance.
Description
Technical field
The invention belongs to inkjet technology field, particularly the preparation method of a kind of compatible spray ink Printing coating MS4.
Background technology
Over nearly 3 or four years, in global show and colour manufacturers, several large giant all can the environment-friendly type painting advertisement material of the multiple ink printed such as compatible solvent type ink, Weak solvent ink and UV solidified ink in research and development.The conventional ink-jet that can adapt to solvent-borne type, environmentally-frieweak weak solvent type and UV curing three kinds of ink printed at present prints coating, is can be dissolved in solvent by dissolution with solvents or swelling resin mostly, then adds related auxiliaries, to adapt to the requirement of product coating waste water.But solvent for use not only increases production cost, also can cause certain pollution to surrounding environment in process of production, certain injury is caused to human body.
1), water-fastness poor there is following defect in traditional water-borne coatings:, in coating resin ester bond facile hydrolysis and overall molecule chain generating portion is degraded, affect the water resistance of coating; 2), because coating dispersion medium used is the water that surface tension is very high, differ larger with coated substrate surface tension values, which results in water-borne coatings in coating process, cannot uniform spreading at substrate surface, the bad phenomenon of easy generation coating shrinkage, " shrinkage cavity ", has a strong impact on product appearance.
Summary of the invention
The object of the invention is to solve the problems of the technologies described above, provide a kind of printing effect good, can the ink of compatible print number of different types, and there is the preparation method of the compatible spray ink Printing coating of remarkable water resistance.
The object of the present invention is achieved like this: a kind of preparation method of compatible spray ink Printing coating, is characterized in that, comprise following processing step:
1), fill a prescription and to be made up of the component of following weight part: the vinegar third cross-linking type microemulsion of 60 parts of solid contents 48%; The polyvinyl acetate emulsion of 40 parts of solid contents 42%; Deionized water 18 parts; Dispersion agent 0.08 part; Flatting silica 8 parts; Defoamer 0.1 part; Wetting agent 0.3 part; Flow agent 0.25 part; 0.7 part, whitening agent;
2), preparation method:
A), the preparation of nano level flatting silica slurry: the dispersion agent adding deionized water and formula ratio in a reservoir, stirring at low speed dissolves 10 minutes, pour appropriate high strength glass microballon into, weigh and slowly add flatting silica, promote mixing speed, high speed dispersion grinding at least 2 hours, the flatting silica suspension liquid obtaining particle exquisiteness is for subsequent use;
B), the preparation of coating fluid: the emulsion taking formula ratio, by A) the flatting silica suspension liquid prepared of step slowly adds, moderate-speed mixer is after 30 minutes, add the coatings additive(s)s such as defoamer, wetting agent, flow agent, whitening agent, continue stirring after 1 hour, filter through 300 mesh filter screens, leave standstill breath bubble, ultrasonic wave froth breaking, stored for future use.
The compatible spray ink Printing coating utilizing the present invention to prepare possesses the ink of best printing effect, energy compatible print number of different types, has remarkable water resistance, instead of conventional solvent-based coating, apply and have good economic and social benefit.
Embodiment
The invention will be further described below, but not as limitation of the present invention:
A preparation method for compatible spray ink Printing coating, is characterized in that, comprises following processing step: 1), filling a prescription is made up of the component of following weight part: the vinegar third cross-linking type microemulsion of 60 parts of solid contents 48%; The polyvinyl acetate emulsion of 40 parts of solid contents 42%; Deionized water 18 parts; Dispersion agent 0.08 part; Flatting silica 8 parts; Defoamer 0.1 part; Wetting agent 0.3 part; Flow agent 0.25 part; 0.7 part, whitening agent; 2), preparation method: A), the preparation of nano level flatting silica slurry: the dispersion agent adding deionized water and formula ratio in a reservoir, stirring at low speed dissolves 10 minutes, pour appropriate high strength glass microballon into, weigh and slowly add flatting silica, promote mixing speed, high speed dispersion grinding at least 2 hours, the flatting silica suspension liquid obtaining particle exquisiteness is for subsequent use; B), the preparation of coating fluid: the emulsion taking formula ratio, by A) the flatting silica suspension liquid prepared of step slowly adds, moderate-speed mixer is after 30 minutes, add the coatings additive(s)s such as defoamer, wetting agent, flow agent, whitening agent, continue stirring after 1 hour, filter through 300 mesh filter screens, leave standstill breath bubble, ultrasonic wave froth breaking, stored for future use.
During concrete enforcement, 1), the ultimate constituent of compatible spray ink Printing coating MS4, comprising: resin aqueous emulsion, aqueous wetting agent, water-based defoamer, water nano level delustring pulvis, aqueous dispersant, water-based flow agent, water-based whitening agent etc.; This coating does not use any solvent, resin emulsion used and all kinds of coatings additive(s) environment friendly and pollution-free, obtained coating imaging effect is good, and water resistance is splendid, and weather resistance is superior, perfectly can replace traditional solvent-borne waterproof ink jet printing coating; 2), compatible spray ink Printing coating take water as dispersion medium, compared with the coating of current currently available products, each technical performance index and parameter all have a clear superiority in, particularly in printing precision and printing colour density, there is the lifting of matter, further broadened application face on the basis of original product, with the printing of compatibility now commercially emerging LATEX type ink and indigo e-inks, the market demand of product is very large, and especially prospect of export is wide.
compatible spray ink Printing coating MS4 structure and principle of work:in compatible spray ink Printing coating MS4, by use cross linking type methyl acrylate and vinyl acetate microemulsion and acetate emulsion composite, and after baking oven for heating, in coating, vinyl acetate between to for plastic and butyl acrylate are through appropriate linking agent effect, there is crosslinking reaction, form stable three-dimensional and run through network structure, arrive splendid waterproof effect; After printing terminates, ink ink dot is firmly locked in three-dimensional to be run through in network, even if be soaked in for a long time in water, the dye molecule in ink, also can not separate out in water; Add appropriate wetting agent, defoamer, flow agent, thickening material etc., to adapt to accurately be coated with requirement, the viscosity of adjustment coating and surface property, make it more meet the multiple coating method in later stage, as comma roller coating, the coating of reticulate pattern press plate, and screw mandrel coating etc.
In order to improve the wettability of water-borne coatings to base material, reach the effect that coating is homogeneous.We carry out corona and ozone-plasma process to base material on the one hand, increase the surface energy of base material; On the other hand, select modification comprehensive silicon ketone wetting agent to reduce water-borne coatings surface tension, make water can be deployed in solid materials on the surface, to improve the wetting function of coating to base material.The feature of this wetting agent is: not containing solvent, has good water-soluble, has good mobility at low temperatures, effectively can improve the dispersiveness of pigment, improve the color development performance of water-borne coatings, can help improve coating film gloss, well can reduce dynamic surface tension.
The compatible spray ink Printing coating MS4 of water-based, easily bubbles, thus affects coating appearance in coating process.Find according to the research of cause of bubbling in coating, solving air bubble problem can start with from three aspects simultaneously:
(1) with suds suppressor, stop the generation of bubble in coating production process, suds suppressor is very easily adsorbed on bubble membranous wall, squeeze the surfactant of stabilise bubbles, the surface tension of bubble chamber film is reduced, and foam wall is thinning, is destroyed in the process of bubble floating.Foam is suppressed to produce in a long time;
(2) with deaerating agent, for the single isolated bubbles in high viscosity coating, improve the flowing of air in coating, be that contiguous foam assembles merging mutually, volume becomes large, and the speed to apparent motion is accelerated, broken bubble after rising to fluid surface;
(3) online ultrasonic wave froth breaking, by ultrasonic vibrations propagate in liquid, cavatition can be produced in liquid, because cavatition can produce surging force, so the gas be dissolved in liquid can be made to crush, depart from, the gas in coating, bubble is made thoroughly to be taken off;
Above-mentioned three kinds of methods are with the use of the de-soak effect to reach the best.
Add calcium carbonate superfine powder powder and ultra-fine aerosil powder as flatting silica and filling powder, be not only the matt effect effectively enhancing coatingsurface, improve strength of coating, as enhancing substance, the effect of a kind of pore volume type of this coating blotting can also be provided.So-called pore volume type blotting, namely in ink jet printing process, the ink dot of ejection drops in the coating on lamp cloth surface, Weak solvent with spray printing ink solvent for use mainly alcohol, ester, ketone greatly, due to macromolecule resin in coating can be alcohol in ink, ester, ketone equal solvent dissolve or swelling, thus lyosorption.But small part solvent can not instantaneously volatilize, coatingsurface can not be dry in time, at this moment the pore volume that formed of powder just can absorption portion is trickle rapidly inkspot, improve and print blotting rate of drying, prevent ink dot to the diffusion of X-Y direction, ensure that the out of roundness of ink-jet point.
compatible spray ink Printing coating MS4 technical optimization scheme:
(1) selection of resin and scheme optimization:
Containing polar polymer in the absorption agent of compatible spray ink Printing coating MS4 used film forming agent and ink, can by alcohol in ink, ester, ketone equal solvent is swelling or dissolve, they can be acetic acid second rare-ethylene copolymerization emulsions, polyvinyl acetate emulsion, acrylate and vinyl acetate emulsion, pure-acrylic emulsion, one or both in polyvinyl chloride emulsion.Through tens of orthogonal experiments, polyvinyl chloride emulsion is not environmentally abandoned at first, and find that the coating of pure-acrylic emulsion prints absorbency through test poor, image resolution ratio is low, and the coating of pure-acrylic emulsion is influenced by ambient temperature too greatly, easily crisp, be easily adhered, poor practicability.Finally determine to adopt acrylate and vinyl acetate emulsion and polyvinyl acetate emulsion to carry out composite, printing effect is best, and can compatible broad variety ink printed.
The acrylate and vinyl acetate emulsion used in this coating, is water-based cross-linking type microemulsion, is applied in coating and has following characteristics: 1) good to the strong adhesion of ground, wettability; 2) emulsion particle diameter is little, and produce crosslinked when film forming, form compactness coating, the coating gloss of formation is high; 3) adopt a large amount of emulsifying agent to add co-surfactant system, emulsion property is stablized, can be composite with other conventional emulsions, realizes performance complement; 4) molecular chain of Microemulsion Polymer has higher conformational energy, and the mechanical properties such as coating shock-resistance, snappiness, hardness and wear resistance are good; 5) vinyl acetate between to for plastic and butyl acrylate have high polarity, dissolve in alcohol, ester, ketone multi-solvents, meet printing demand.
The performance characteristics of vinyl acetate-ethylene copolymerization (VAE) emulsion is low-temperature flexibility and low temperature water-repellancy, and this emulsion film forming performance is given prominence to, can be compatible with multiple emulsion, also can mix with other additives such as softening agent, thickening material etc.But its polymeric film softness has good cementability to low-surface energy substance, along with seasonal variation, when the temperature increases, even there is pressure-sensitive to a certain degree, it is anti-sticky that this will cause to bottom in rolling and rewinding process, and face-coating then there will be damage to a certain degree, crude.
In order to take into account low-temperature flexibility, water-repellancy, film-forming properties and can be chemical property etc., but the low-down Vinyl Acetate Copolymer of aggressive tack (PVAc) emulsion after film forming, more meet the requirements.By carrying out Experimental comparison to different emulsion, the saturation ratio of discovery compound emulsion coating compatible spray ink Printing coating MS4 print image colour density, color meets service requirements completely, and feel is smooth, water-fast washed, the features such as good weatherability.
(2) optimization of coating surface tension force:
Water-borne coatings requires very high to the degree of cleaning of the coated substrate surface of contact, can not occur dirty, particularly oil mark.For this problem, we attempt the surface energy increasing base material on the one hand, and conventional process carries out corona method process to its surface.Most of plastics film (as poly-hydrocarbon film) belongs to non-polar polymer, surface tension is lower, general at 30-33dyn/cm, theoretically, if the surface tension of object is lower than 36dyn/cm, ink known at present and tackiness agent all at adhere firmly above, therefore cannot will carry out corona method process to its surface.Its handling principle produces high frequency, high pressure on a processing device, makes it produce high frequency, electrion, produces tiny intensive hyacinthine spark.The various ions produced after ionization of air are under the effect of highfield, and the plastics film by electrode discharge and in shock treatment device, makes the chemical bond rupture of plastic molecules and degrade, and increase surfaceness and surface-area.Also be equipped with ozone-plasma process during corona, ozone is a kind of strong oxidizer, and plastic molecules can be made to be oxidized, and produces carbonyl and the stronger group of superoxide isopolarity, thus improves its surface energy.But even if having passed through corona method process, substrate surface tension is maximum also can only reach 40-45dyn/cm, still have gap with the surface tension (at 25 DEG C 72dyn/cm) of water.
For this reason, we further consider and add wetting agent to reduce water-borne coatings surface tension, make water can be deployed in solid materials on the surface, to improve the wetting function of coating to base material.To dissimilar wetting agent, we have done great many of experiments, to test its surface wetting capability to acceptable substrate.Find through experiment, the wetting agent of fats is water-soluble poor, bad with the Combination of coating; Poly-hydroxyalkyl ethers wetting agent is comparatively responsive to use temperature, zero pour at about 2 DEG C, affect its in the winter time low temperature time use; The wetting agent of special ethers is better water-soluble, better with the consistency of other components in coating, but obtained coating is general to the wetting ability of base material, does not reach processing requirement.Select modification comprehensive silicon ketone wetting agent, not containing solvent, have good water-soluble, there is good mobility at low temperatures, effectively can improve the dispersiveness of pigment, improve the color development performance of water-borne coatings, coating film gloss can be helped improve, well can reduce dynamic surface tension, improve water-borne coatings to the wettability of base material, reach the effect that coating is homogeneous.
(3) solution of air bubble problem
The compatible spray ink Printing coating MS4 of water-based, easily bubbles, thus affects coating appearance in coating process, and adding defoamer is comparatively effective means.We have successively tried out hydrophobic titanium dioxide silicon defoamer, mineral oil defoaming agent, paraffin class defoamer, polyethers defoamer and silicone based defoamer etc., have done a large amount of simultaneous test.
Hydrophobic granule in hydrophobic titanium dioxide silicon defoamer moves on bubble chamber film, the surfactant of the steady bubble of absorption, and the force of cohesion of film is reduced and then broken bubble, but finds its effect in high viscosity coating system and not obvious through test.Same problem also appears on polyethers defoamer.Although mineral oils, paraffin class defoamer defoaming effect are better, their consistencies in emulsion coatings are bad, easily to the migration of obtained coatingsurface, affect the print performance of product.
The modified organo-silicon defoamer selected, be characterized in that surface tension is little, surfactivity is high, and froth breaking power is strong, and consumption is few, and cost is low.It and water and most organism not miscible, all can froth breaking to most of bubble medium.It has good thermostability, can use in 5 DEG C-150 DEG C broad temperature ranges; Its chemical stability is better, and difficult and other substance reactions, as long as configuration suitably, can use in acid, alkali, salts solution, harmless quality product.There is very strong spread through modified defoamer, improve the consistency with system, do not affect gloss and the dryness of coating.
After adopting the present invention, the main performance index reached is: whiteness >=92%; Smoothness >=240s; Glossiness≤7%; Water resistance >=72h/ water logging; Ageing-resistant performance >=5 year; Print resolution 1440dpi; Print rate of drying≤10 minute; Coating environment for use temperature-20 DEG C ~ 60 DEG C.
Obviously, above-described embodiment is only for example of the present invention is clearly described, and the restriction not to embodiment.For those of ordinary skill in the field; can also make other changes in different forms on the basis of the above description; here exhaustive without the need to also giving all embodiments, and thus the apparent change of amplifying out or variation be still among protection scope of the present invention.
Claims (1)
1. a preparation method for compatible spray ink Printing coating, is characterized in that, comprises following processing step:
1), fill a prescription and to be made up of the component of following weight part: the vinegar third cross-linking type microemulsion of 60 parts of solid contents 48%; The polyvinyl acetate emulsion of 40 parts of solid contents 42%; Deionized water 18 parts; Dispersion agent 0.08 part; Flatting silica 8 parts; Defoamer 0.1 part; Wetting agent 0.3 part; Flow agent 0.25 part; 0.7 part, whitening agent;
2), preparation method:
A), the preparation of nano level flatting silica slurry: the dispersion agent adding deionized water and formula ratio in a reservoir, stirring at low speed dissolves 10 minutes, pour appropriate high strength glass microballon into, weigh and slowly add flatting silica, promote mixing speed, high speed dispersion grinding at least 2 hours, the flatting silica suspension liquid obtaining particle exquisiteness is for subsequent use;
B), the preparation of coating fluid: the emulsion taking formula ratio, by A) the flatting silica suspension liquid prepared of step slowly adds, moderate-speed mixer is after 30 minutes, add the coatings additive(s)s such as defoamer, wetting agent, flow agent, whitening agent, continue stirring after 1 hour, filter through 300 mesh filter screens, leave standstill breath bubble, ultrasonic wave froth breaking, stored for future use.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106221468A (en) * | 2016-08-19 | 2016-12-14 | 上海谷奇数码科技有限公司 | Multi-functional Weak solvent prints coating and preparation method thereof |
| CN106497266A (en) * | 2015-09-07 | 2017-03-15 | 吴文州 | Waterproof paint formula and pen using waterproof paint |
| CN109968829A (en) * | 2019-04-28 | 2019-07-05 | 苏州绿曼纸包装制品有限公司 | A kind of Multifunctional printing equipment for label production |
| CN115820066A (en) * | 2022-12-13 | 2023-03-21 | 中国化工株洲橡胶研究设计院有限公司 | Water-based coating paint for thermal transfer ink-jet printing and preparation method and application thereof |
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| WO2014044322A1 (en) * | 2012-09-21 | 2014-03-27 | Hewlett-Packard Indigo B.V. | Method for performing liquid electrophotographic printing |
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| CN1800491A (en) * | 2005-12-14 | 2006-07-12 | 四川新泰克控股有限责任公司 | Novel coating material for ink jetting medium and its preparation method |
| CN1827393A (en) * | 2006-04-07 | 2006-09-06 | 南通科兴化工有限公司 | Waterproof colored digital image spray-painting and printing medium |
| CN101905553A (en) * | 2010-06-25 | 2010-12-08 | 李剑平 | Spray-painting advertising lamp box cloth |
| WO2014044322A1 (en) * | 2012-09-21 | 2014-03-27 | Hewlett-Packard Indigo B.V. | Method for performing liquid electrophotographic printing |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106497266A (en) * | 2015-09-07 | 2017-03-15 | 吴文州 | Waterproof paint formula and pen using waterproof paint |
| CN106221468A (en) * | 2016-08-19 | 2016-12-14 | 上海谷奇数码科技有限公司 | Multi-functional Weak solvent prints coating and preparation method thereof |
| CN109968829A (en) * | 2019-04-28 | 2019-07-05 | 苏州绿曼纸包装制品有限公司 | A kind of Multifunctional printing equipment for label production |
| CN115820066A (en) * | 2022-12-13 | 2023-03-21 | 中国化工株洲橡胶研究设计院有限公司 | Water-based coating paint for thermal transfer ink-jet printing and preparation method and application thereof |
| CN115820066B (en) * | 2022-12-13 | 2024-04-05 | 中国化工株洲橡胶研究设计院有限公司 | Water-based coating for thermal transfer ink-jet printing, and preparation method and application thereof |
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