CN101302374A - Method for improving water-based flexographic plate printing ink re-dissolubility - Google Patents
Method for improving water-based flexographic plate printing ink re-dissolubility Download PDFInfo
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- CN101302374A CN101302374A CN 200810052207 CN200810052207A CN101302374A CN 101302374 A CN101302374 A CN 101302374A CN 200810052207 CN200810052207 CN 200810052207 CN 200810052207 A CN200810052207 A CN 200810052207A CN 101302374 A CN101302374 A CN 101302374A
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Abstract
The invention relates to a method for improving the resolubility of a water-based flexography printing ink. The water-based flexography printing ink adopts the raw materials of resin vehicle, pigment, addition agent and solvent; the method is characterized by comprising the following implementation steps that: (1) a water-based acrylic resin solution with three different types is adopted as a vehicle part of the printing ink and added by stages; the resin solution is a dispersion-type acrylic resin solution, a covering type acrylic resin solution and a film forming type acrylic resin solution; the total of the resin solution accounts for 40 to 65 percent of the whole weight of the printing ink; the dispersion-type acrylic resin solution is added in the grinding stage of printing ink production; and the covering type acrylic resin solution and the film forming type acrylic resin solution are added after the grinding stage of the printing ink production and evenly mixed with a printing ink system; (2) an amine substance or a substance which shows alkalescence is adopted as an addition agent; a PH value of the addition agent is between 8.5 and 10; the addition agent is added after the grinding stage of the printing ink production and is evenly mixed with the printing ink system; and the adding amount of the addition agent accounts for 0.5 to 2.5 percent of the whole weight of the printing ink. The method has simple process and remarkable effect.
Description
Technical field
The present invention relates to a kind of method that improves ink performance, relate in particular to a kind of method that improves water-based flexographic plate printing ink re-dissolubility.
Background technology
In the flexible printing of Corrugated Box, the water color ink proportion is very big, and this is that water color ink can satisfy the requirement of print quality because the literal or the simple pattern that print on Corrugated Box need not very high gloss; Moreover Corrugated Box is the loose intertexture of fiber, and stronger water-absorbent is arranged, and behind the printing water color ink, to permeate drying, need not to be provided with drying installation; And water color ink is nontoxic, and is harmless, nonflammable, safety easy to use, and cost is low.Comprehensive these factors, the topmost mode of printing of fluting board is a flexo, and the most frequently used printing ink is water color ink.Along with the enhancing of China joined WTO and people's environmental consciousness,, must guarantee that the requirement of printed apcksging material security, the feature of environmental protection presents tangible ascendant trend in recent years round flexographic printing.China's restriction organic volatile (VOC) appearance of emission standard in atmosphere makes water color ink more and more show its superiority.
But, there is the printing adaptability condition of poor in the water base flexographic printing ink of Xiao Shouing in the market, solubility is relatively poor, promptly continue in the printing process, particularly in long-time printing process, occur easily because the stifled edition problem that the variation of solubility property again of printing ink causes is difficult to satisfy the printing house and produces successional requirement.Through initial analysis, this situation mainly is owing to along with reasons such as volatile composition loss solubility property more too fast and resin in the ink system is bad cause.
Therefore, providing a kind of method of simple and effective improvement water-based flexographic plate printing ink re-dissolubility, is one of the current urgency of this field scientific research personnel difficult problem to be solved.
Summary of the invention
The objective of the invention is to overcome the weak point of above-mentioned drying means, provide a kind of and effectively improve the quality of products, technology is simple, the method for obvious results improvement water-based flexographic plate printing ink re-dissolubility.
Implementation step of the present invention for achieving the above object is as follows:
A kind of method that improves water-based flexographic plate printing ink re-dissolubility, water base flexographic printing ink adopt raw material to comprise: resin low-melting ink vehicle, pigment, auxiliary agent, solvent; It is characterized in that implementation step is as follows:
(1) adopts the resin low-melting ink vehicle part of three kinds of dissimilar water-borne acrylic type resin liquid, and add stage by stage as printing ink; Described resin liquid is decentralized acrylic resin liquid, covering type acrylic resin liquid and film-forming type acrylic resin liquid; The liquid-solid body burden 35% of decentralized acrylic resin wherein, molecular weight (Mw) is 10000, and the acid value of resin is 230mgKOH/g, and accounting for the resin liquid overall ratio is 38%; The liquid-solid body burden 48% of covering type acrylic resin, molecular weight (Mw) is 200000, and the acid value of resin is 175mgKOH/g, and accounting for the resin liquid overall ratio is 15%; The liquid-solid body burden 45% of film-forming type acrylic resin, molecular weight (Mw) is 37000, and the acid value of resin is 141mgKOH/g, and accounting for the resin liquid overall ratio is 47%; The total consumption of resin liquid accounts for the 40-65% of printing ink overall weight; Decentralized acrylic resin liquid added in the grinding stage that printing ink is produced, and covering type acrylic resin liquid and film-forming type acrylic resin liquid add after the printing ink grinding stage and mix with ink system and gets final product;
(2) auxiliary agent of Cai Yonging is amine substance or the material that presents alkalescence, and pH is 8.5-10, it is added after the printing ink grinding stage and ink system mixes and gets final product; Its add-on is the 0.5-2.5% of printing ink overall weight.
The invention has the beneficial effects as follows: this method has very obvious effects for the printing ink machine stability that improves the long-time printing process of printing ink.Through the fatigue strength evidence, water base flexographic printing ink after the improvement is by No. 1 forme of cleaning in original 1 hour (printing ink keeps lasting printing process), bring up to 6 hours and clean No. 1 forme, prolonged the machine stability of printing ink greatly, help the printing house and produce successional requirement.Technology of the present invention is simple, and effect is remarkable, effectively improves the quality of products.The printing ink that adopts this method to be prepared from helps the raising of printing house production continuity level especially, strengthens such competitiveness of product in market.
Embodiment
Below in conjunction with preferred embodiment, to details are as follows according to embodiment provided by the invention:
The structure of existing water base flexographic printing ink is resin low-melting ink vehicle, pigment, auxiliary agent, solvent, can improve printing ink solubility problem and then will set about aspect resin and the auxiliary agent two.
1, resin aspect
For water color ink, the numerical value of acid value is very big for the water-soluble meaning of resin.In general, acid value is better greater than the solubility property again of the used for water color ink resin of 140mgKOH/g, and then solubility property is relatively poor more on the contrary; But the too high water repelling property of printed matter that also can cause of acid value is bad, so the balance of resin choice GPRS good dissolving, also will consider the integrated application performance of printing ink simultaneously.Water color ink is normally used to be acrylic resin liquid, and the resin liquid of common water base flexographic printing ink is formed (dispersion type resin liquid/film-forming type resin liquid=3/7) and existed solubility bad.By analysis: the main effect of decentralized acrylic resin liquid is pigment is disperseed, and helps the printing ink color development, and acid value is all higher, so can there be bad phenomenon in solubility property again; And the main effect of film-forming type acrylic resin liquid is to promote the toughness of printing ink epithelium, is beneficial to various relevant post-treatment, and acid value is less than normal; Therefore in general its again solubility property more or less can be subjected to certain influence, thereby cause again the reduction of solubility property; The scientific research personnel is through test of many times under the prerequisite that guarantees former ink printing effect, the low-melting ink vehicle part of three kinds of dissimilar water-borne acrylic type resin liquid as printing ink adopted in decision: wherein decentralized acrylic resin liquid added in the grinding stage that printing ink is produced, (main effect is to promote the rate of drying of printing ink epithelium to covering type acrylic resin liquid, guarantee the color opacifying power of printing simultaneously, acid value is higher than film forming resinoid liquid) and film-forming type acrylic resin liquid then to after the printing ink grinding stage, add, and mix with ink system and to get final product.The total add-on of resin liquid accounts for printing ink overall weight 40-65%.Proportioning sees following table for details:
| Classification | Solids content | Molecular weight (Mw) | The acid value of resin | Account for the resin liquid overall ratio |
| Decentralized acrylic resin liquid | 35％ | 10000 | 230mgKOH/g | 38％ |
| Covering type acrylic resin liquid | 48％ | 200000 | 175mgKOH/g | 15％ |
| Film-forming type acrylic resin liquid | 45％ | 37000 | 141mgKOH/g | 47％ |
2, auxiliary agent aspect
Under the good prerequisite of Choice of Resin, the auxiliary agent that stable ink system is used can help printing ink further to improve the performance of the aspects such as solubility in printing process, usually this class material all belongs to the material that contains amine or present alkalescence, pH is 8.5-10, it is added with ink system mix and get final product after the printing ink grinding stage; Its add-on is the 0.5-2.5% of printing ink overall weight.Because their volatility are lower, simultaneously because intermiscibility is arranged with other solvent in the ink system, thus can suppress the volatilization of fast Ganlei's solvent to a certain extent, thus the ink system solvent balance of long-time printing process guaranteed.
Below be example to prepare the bright red printing ink of water base flexographic plate
The preparation method of existing water base flexographic printing ink and each component % by weight take by weighing weight and are respectively:
With azophloxine pigment 15kg, dispersion type resin liquid 18kg, deionized water 10kg, dispersion agent 0.5kg, defoamer 0.5kg, after high-speed stirring mixes, be ground to needed fineness with sand China ink machine, then needed film-forming type resin liquid 43kg, alcoholic solvent 3kg, deionized water 10kg are added together, after mixing, detect index of correlation, do certain adjustment and after-filtration, barrelling.The printing ink of preparing with this method tries seal on miniprinter, occur when continuing to print about 45 minutes because the phenomenon of the bad and stifled version of solubility.
The inventive method, promptly the preparation method of water base flexographic printing ink after the improvement and each component by weight % take by weighing weight and be respectively:
With azophloxine pigment 15kg, dispersion type resin liquid 20kg, deionized water 10kg, dispersion agent 0.5kg, defoamer 0.5kg, after high-speed stirring mixes, be ground to needed fineness with sand China ink machine routinely, then needed covering type resin liquid 10kg, film-forming type resin liquid 30kg, alkaline stabiliser 1kg, alcoholic solvent 3kg, deionized water 10kg are added together, after mixing, detect index of correlation routinely, do certain adjustment after-filtration, barrelling.The printing ink made from this method tries seal on miniprinter, continue printing 5 hours, does not occur any bad problem yet, the effect highly significant.
Above-mentioned detailed description of the method for this improvement water-based flexographic plate printing ink re-dissolubility being carried out with reference to embodiment; be illustrative rather than determinate; can exemplify out several embodiment according to institute's limited range; therefore in the variation and the modification that do not break away under the general plotting of the present invention, should belong within protection scope of the present invention.
Claims (1)
1, a kind of method that improves water-based flexographic plate printing ink re-dissolubility, water base flexographic printing ink adopt raw material to comprise: resin low-melting ink vehicle, pigment, auxiliary agent, solvent; It is characterized in that implementation step is as follows:
(1) adopts the resin low-melting ink vehicle part of three kinds of dissimilar water-borne acrylic type resin liquid, and add stage by stage as printing ink; Described resin liquid is decentralized acrylic resin liquid, covering type acrylic resin liquid and film-forming type acrylic resin liquid; The liquid-solid body burden 35% of decentralized acrylic resin wherein, molecular weight (Mw) is 10000, and the acid value of resin is 230mgKOH/g, and accounting for the resin liquid overall ratio is 38%; The liquid-solid body burden 48% of covering type acrylic resin, molecular weight (Mw) is 200000, and the acid value of resin is 175mgKOH/g, and accounting for the resin liquid overall ratio is 15%; The liquid-solid body burden 45% of film-forming type acrylic resin, molecular weight (Mw) is 37000, and the acid value of resin is 141mgKOH/g, and accounting for the resin liquid overall ratio is 47%; The total consumption of resin liquid accounts for the 40-65% of printing ink overall weight; Decentralized acrylic resin liquid added in the grinding stage that printing ink is produced, and covering type acrylic resin liquid and film-forming type acrylic resin liquid add after the printing ink grinding stage and mix with ink system and gets final product;
(2) auxiliary agent of Cai Yonging is amine substance or the material that presents alkalescence, and pH is 8.5-10, it is added after the printing ink grinding stage and ink system mixes and gets final product; Its add-on is the 0.5-2.5% of printing ink overall weight.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101824246A (en) * | 2010-05-06 | 2010-09-08 | 合肥元和水性化学技术有限公司 | Water-based flexographic ink system dedicated to dual-PE paper cups |
| CN101724315B (en) * | 2009-12-23 | 2012-06-13 | 深圳市通产丽星股份有限公司 | UV snowflake printing ink |
| CN103242710A (en) * | 2013-05-24 | 2013-08-14 | 苏州凹凸彩印厂 | Water-based flexible ink with high stability and preparation method thereof |
| CN104592830A (en) * | 2014-12-26 | 2015-05-06 | 上海乘鹰新材料有限公司 | Water-based direct coated mirror surface gold/silver packaging coating composition |
-
2008
- 2008-01-29 CN CN 200810052207 patent/CN101302374A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101724315B (en) * | 2009-12-23 | 2012-06-13 | 深圳市通产丽星股份有限公司 | UV snowflake printing ink |
| CN101824246A (en) * | 2010-05-06 | 2010-09-08 | 合肥元和水性化学技术有限公司 | Water-based flexographic ink system dedicated to dual-PE paper cups |
| CN103242710A (en) * | 2013-05-24 | 2013-08-14 | 苏州凹凸彩印厂 | Water-based flexible ink with high stability and preparation method thereof |
| CN104592830A (en) * | 2014-12-26 | 2015-05-06 | 上海乘鹰新材料有限公司 | Water-based direct coated mirror surface gold/silver packaging coating composition |
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Open date: 20081112 |