CN105062208A - Flexographic plate water-based ink for high-speed printing and preparation method thereof - Google Patents
Flexographic plate water-based ink for high-speed printing and preparation method thereof Download PDFInfo
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Abstract
The present invention provides a flexographic plate water-based ink for high-speed printing and a preparation method thereof. The flexographic plate water-based ink comprises the following components by weight: 30-40 parts of a non-film forming acrylic emulsion, 5-10 parts of an acrylic film-forming emulsion, 15-0 parts of an acrylic resin solution, 30-40 parts of an aqueous paste, 1-3 parts of polyethylene wax, 1-2 parts of a film-forming aid, 0.3-1 part of a leveling agent, 0.1-0.5 part of a defoamer, 3-7 parts of deionized water and a pH modifier. The non-film forming acrylic emulsion is an acrylic emulsion with Tg value no less than 90 DEG C, the acrylic film-forming emulsion is an acrylic emulsion with Tg value less than 30 DEG C, the content of the pigment in the aqueous paste is 40-45%, and the pH modifier reaches pH value of the flexographic plate water-based ink of 8-9.5. The water-based ink can well adapt to printing of high-speed satellite-type press, and has good re-solubility and excellent leveling and trapping effect; and the printed product has high color saturation, bright color and good gloss; therefore, the water-based ink has wide range of applications.
Description
Technical field
The present invention relates to a kind of water color ink, flexographic plate water color ink particularly relating to a kind of high speed printing and preparation method thereof.
Background technology
Flexographic printing is called for short flexographic printing, is a kind ofly use flexographic plate and transmit the mode of printing of ink by anilox roll.Traditional flexographic printing uses rubber relief printing plate, cannot print off high-quality image, until du pont company develops the resin plate of ultra-violet curing mode, just achieve the high precision of printing.In recent years, at packaging industry, along with the development of the technology such as plate, plate-making, anilox roll, plate cylinder sleeve mode, flexographic printing has become the mode of printing that in printing industry, rate of growth is fast and the most most active in worldwide.
Along with people are to the raising day by day of product external packaging security requirement and the attention gradually to environment protection, flexible painting plate ink develops into present water color ink from original solvent type ink.Flexographic plate aqueous ink processes primarily of water soluble resin, pigment dyestuff, solvent and related auxiliaries, it is not containing volatile organic solvent, therefore the discharge of organic volatile (voc) is greatly reduced, eliminate the harm of human body and the pollution to packaged commodity, be specially adapted to the Packaging Printing Product that the health conditions requirings such as cigarette, wine, food, beverage, medicine, toy for children are strict.
At present, carton packs flexographic plate water color ink used in packaging ink in occupation of critical role, but be not very desirable for the speed of flexographic presses of carton packaging and efficiency, such as the print speed of domestic wide cut unit type press is only about 100 ms/min, and the print speed of domestic wide cut central cylinder type press is mostly at about 150 ~ 180 ms/min.Import wide cut satellite-type flexible printing machine is mainly from the company such as German W & H, German F & K, Italian OFEM, U.S. FEVA, Spain COMEXI, the print speed of its design is higher, substantially all at 300 ~ 500 ms/min.But; existing water color ink can produce problems when the flexible printing machine for import; such as underdry, viscosity is high thus cause circulation pump to take out motionless ink; and add water reduce to exist after viscosity levelling property difference, of light color, produce water wave, double exposure weak effect, the defect such as can not to print for a long time; frequent needs are shut down and are washed version thus impact production; not only production efficiency is low, also can cause the waste of the materials such as paper.
Publication number is that the Chinese patent of CN104559465A discloses a kind of Environmental-protection water-based ink; it adopts two kinds of different polyacrylate dispersions, vinylformic acid, and filming emulsion, pigment, auxiliary agent and water are not prepared from; be applicable to the printing of the wrapping material such as paper, plastics film; but its printing adaptability in printing process is poor; tinting strength is low; need repeatedly stop cleaning, and easily occur network blocking point phenomenon, the flexographic plate high speed printing of 300 ~ 500 ms/min cannot be adapted to.Therefore, a kind of flexographic plate water color ink that can adapt to high speed printing is expected.
Summary of the invention
Flexographic plate water color ink that the invention provides a kind of high speed printing and preparation method thereof, cannot adapt to the technological deficiencies such as flexographic plate high speed printing for solving water color ink of the prior art.
The invention provides a kind of flexographic plate water color ink of high speed printing, comprise the component of following weight part: vinylformic acid is filming emulsion 30 ~ 40 parts not, vinylformic acid filming emulsion 5 ~ 10 parts, acrylic resin soln (acrylic resin soln A) 15 ~ 20 parts, aqueous color paste 30 ~ 40 parts, polyethylene wax 1 ~ 3 part, film coalescence aid 1 ~ 2 part, flow agent 0.3 ~ 1 part, defoamer 0.1 ~ 0.5 part, deionized water 3 ~ 7 parts and pH adjusting agent; Wherein, described vinylformic acid not filming emulsion is the ACRYLIC EMULSION of Tg value >=90 DEG C, described vinylformic acid filming emulsion is the ACRYLIC EMULSION of Tg value < 30 DEG C, in described aqueous color paste, the mass content of pigment is 40 ~ 45%, and described pH adjusting agent makes the pH value of flexographic plate water color ink be 8 ~ 9.5.
In the present invention, vinylformic acid not filming emulsion and vinylformic acid filming emulsion is divided into according to the difference of ACRYLIC EMULSION Tg value; Particularly, the ACRYLIC EMULSION of Tg value >=90 DEG C is divided into vinylformic acid not filming emulsion, the ACRYLIC EMULSION of Tg value < 30 DEG C is divided into vinylformic acid filming emulsion; Further, the Tg value of described vinylformic acid not filming emulsion is 95 ~ 110 DEG C, and the Tg value of described vinylformic acid filming emulsion is 20 ~ 25 DEG C.The composition of the present invention to described ACRYLIC EMULSION does not make considered critical, under the condition meeting the requirement of Tg value, can adopt the ACRYLIC EMULSION of various composition, such as pure-acrylic emulsion, benzene emulsion or its mixture etc.
In one embodiment, described vinylformic acid not filming emulsion can be solid content 44 ~ 50%, such as 48%, Tg value 95 ~ 110 DEG C, such as 100 ~ 110 DEG C, acid number 50 ~ 60mgKOH/g, such as 50mgKOH/g, pH value 8 ~ 9, the ACRYLIC EMULSION of such as 8.2; Particularly, this vinylformic acid not filming emulsion be specially benzene emulsion.Can be met the vinylformic acid not filming emulsion of above-mentioned requirements by common commercial acquisition, such as it can be BasfJoncryl89, IndulorSE900, DSMA-1091 etc.
In one embodiment, described vinylformic acid filming emulsion can be solid content 45 ~ 50%, such as 46%, Tg value 20 ~ 25 DEG C, such as 20 DEG C, acid number 40 ~ 55mgKOH/g, such as 40mgKOH/g, pH value 8 ~ 9, the ACRYLIC EMULSION of such as 8.5.Can be met the vinylformic acid filming emulsion of above-mentioned requirements by common commercial acquisition, such as it can be BasfJoncryl77, IndulorSE2872 etc.
In the present invention, the aqueous solution that described acrylic resin soln (acrylic resin soln A) is acrylic resin (acrylic resin A), it can by making soluble in water for acrylic resin, and can according to circumstances add other auxiliary agent, such as defoamer, pH adjusting agent etc.Further, in described acrylic resin soln (acrylic resin soln A), the content (solid content) of acrylic resin (acrylic resin A) can be 30 ~ 40%.Particularly, the Tg value of this acrylic resin (acrylic resin A) can be 85 ~ 105 DEG C; Acid number can be about 210 ~ 230mgKOH/g; Molecular-weight average can be 6000 ~ 9000.Can be met the acrylic resin A of above-mentioned requirements by common commercial acquisition, such as it can be Joncryl678, IndulorSR10 etc.
In one embodiment, described acrylic resin soln (acrylic resin soln A) can comprise acrylic resin A30 ~ 40 part, deionized water 50 ~ 70 parts, defoamer 0.1 ~ 0.3 part and make the pH value of described acrylic resin soln (acrylic resin soln A) be the pH adjusting agent of 8.5 ~ 9.5, and the Tg value of described acrylic resin A is 85 ~ 105 DEG C, such as 98 DEG C, acid number is 210 ~ 230mgKOH/g, such as 220mgKOH/g, molecular-weight average is 7000 ~ 9000, such as 8000.
In the present invention, described aqueous color paste is the solution of pigment, and the solvent dissolving pigment can comprise deionized water, and particularly solvent can be deionized water and acrylic resin soln, and can according to circumstances add other auxiliary agent, such as defoamer, wetting dispersing agent etc.Particularly, this acrylic resin soln can be the acrylic resin soln different from aforesaid propylene acid resin solution A, i.e. acrylic resin soln B, and it is the aqueous solution of acrylic resin B, wherein can add other auxiliary agent, such as defoamer, pH adjusting agent etc.Further, in described acrylic resin soln B, the content (solid content) of acrylic resin B can be 35 ~ 40%.Particularly, the Tg value of this acrylic resin B can be 85 ~ 115; Acid number can be 220 ~ 240mgKOH/g; Molecular-weight average can be 15000 ~ 16500.Can be met the acrylic resin B of above-mentioned requirements by common commercial acquisition, such as it can be Joncryl696, Joncryl690 etc.
In one embodiment, described aqueous color paste comprises pigment 40 ~ 45 parts, acrylic resin soln B25 ~ 30 part, deionized water 25 ~ 35 parts, wetting dispersing agent 1 ~ 3 part and defoamer 0.1 ~ 0.3 part, wherein: described acrylic resin soln B comprises acrylic resin B35 ~ 40 part, deionized water 50 ~ 60 parts, defoamer 0.1 ~ 0.3 part and make the pH value of described acrylic resin soln B be the pH adjusting agent of 8.5 ~ 9.5, and the Tg value of described acrylic resin B is 85 ~ 115, acid number is 220 ~ 240mgKOH/g, and molecular-weight average is 15000 ~ 16500.
Further, described pigment can be selected from one or more in phthalocyanine blue (such as PB15:3), phthalein viridescent (such as PG7), permanent bordeaux (such as PR57:1), diarylide yellow (such as PY14), permanent violet (such as PV23), carbon black (such as PBK7) and rhodo (such as PR122); Described wetting dispersing agent can be selected from TEGOdispers760, TEGOdispers750, HLD-11, Silok-7116W and Silok-7117 one or more; Described defoamer can be silicone antifoam agent, such as, can be selected from one or more in TEGO1488, BYK093, BYK094 and DC65.
Further, described film coalescence aid can be selected from one or more in propylene glycol monomethyl ether, propylene glycol, diethylene glycol monobutyl ether and diethylene glycol ether; Described flow agent can be selected from polyether silicone, such as, in alkoxyl group alkyne diol and dioctyl Soduxin one or more, such as TEGOWET500, TEGOWET270, SURFYNOL420, OT-75 etc.; Described polyethylene wax can be selected from MD-2000, AQUAACER552 and D-806 one or more; Described pH adjusting agent can be selected from Monoethanolamine MEA BASF, diethanolamine, trolamine and AMP-95 one or more.
Above-mentioned flexographic plate water color ink is at Zahn2# cup, and viscosity when 25 DEG C is 24-25 ".
The present invention also provides the preparation method of arbitrary described flexographic plate water color ink, comprises the steps:
According to weight part by described vinylformic acid not filming emulsion and described vinylformic acid filming emulsion stirring and evenly mixing, obtained mixed emulsion;
Under agitation, in described mixed emulsion, described acrylic resin soln is added according to weight part, after stirring and evenly mixing, continue to add described flow agent, polyethylene wax, film coalescence aid, pH adjusting agent, defoamer and deionized water, after abundant stirring, then add described aqueous color paste, after stirring and evenly mixing, filter, obtained described flexographic plate water color ink.
Further, described acrylic resin soln is prepared by the following method:
The deionized water of the acrylic resin A and 50 ~ 70 of 30 ~ 40 parts part is added in reactor, after being warming up to 60 ~ 70 DEG C, under agitation add the defoamer of pH adjusting agent and 0.1 ~ 0.3 part, and make the pH value of solution in reactor maintain 8.5 ~ 9.5, after cooling, obtained described acrylic resin soln; Wherein, the Tg value of described acrylic resin A is 85 ~ 105 DEG C, and acid number is about 210 ~ 230mgKOH/g, and molecular-weight average is 7000 ~ 9000.
Further, described aqueous color paste is prepared by the following method:
1) deionized water of the acrylic resin B and 50 ~ 60 of 35 ~ 40 parts part is added in reactor, after being warming up to 60 ~ 70 DEG C, under agitation add the defoamer of pH adjusting agent and 0.1 ~ 0.3 part, and make the pH value of solution in reactor maintain 8.5 ~ 9.5, after cooling, obtained acrylic resin soln B; Wherein, the Tg value of described acrylic resin B is 85 ~ 115, and acid number is 220 ~ 240mgKOH/g, and molecular-weight average is 15000 ~ 16500;
2) in reactor, add the defoamer of the described acrylic resin soln B of 25 ~ 30 parts, the deionized water of 25 ~ 35 parts, the wetting dispersing agent of 1 ~ 3 part and 0.1 ~ 0.3 part, after stirring, add the pigment of 40 ~ 45 parts again, stir 2 ~ 3h, be ground to granularity≤10 μm, obtained described aqueous color paste.Further, the speed of stirring can be 500 ~ 900 revs/min.
Flexographic plate water color ink of the present invention can adapt to the printing of high speed satellite formula printing press well, and speed can reach per minute 400 meters ~ 500 meters; Particularly its environmental protection when high speed printing, good fluidity, rate of drying are fast, there is levelling and the double exposure effect of good solubility and excellence, print product fullness of shade is high, bright-colored, glossiness is good, can be widely used in the printing being coated with white card, ivory board, enamelled paper etc.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with embodiments of the invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment 1
The flexographic plate water color ink of the high speed printing of the present embodiment, be made up of the component of following weight part: vinylformic acid is filming emulsion 32.9 parts not, vinylformic acid filming emulsion 5 parts, acrylic resin soln A15 part, aqueous color paste 39 parts, polyethylene wax 1.5 parts, film coalescence aid 1 part, flow agent 0.3 part, defoamer 0.1 part, pH adjusting agent 0.2 part and deionized water 5 parts.
In above-mentioned flexographic plate water color ink:
Vinylformic acid not filming emulsion adopts ACRYLIC EMULSION BasfJoncryl89, and its solid content is 48%, Tg value is 98 DEG C, and acid number is 50mgKOH/g, and pH value is 8.3; Vinylformic acid filming emulsion adopts ACRYLIC EMULSION BasfJoncryl77, and its solid content is 46%, Tg value is 21 DEG C, and acid number is 55mgKOH/g, and pH value is 8.3; Polyethylene wax is specially polyethylene wax MD-2000; Film coalescence aid is specially propylene glycol monomethyl ether; Flow agent is specially TEGOWET500; Defoamer is specially BYK093; PH adjusting agent is specially diethanolamine; It is common commercially available.
Acrylic resin soln A is made up of the component of following weight part: acrylic resin A (Joncryl678) 33 parts, deionized water 55.4 parts, diethanolamine 10 parts, AMP-951.5 part, defoamer BYK0930.1 part; Wherein the pH value of acrylic resin soln A is 8.5 ~ 9.5, and the Tg value of acrylic resin A (Joncryl678) is 85 DEG C, and acid number is 215mgKOH/g, and molecular-weight average is 8600.
Aqueous color paste is made up of the component of following weight part: red pigment (PR57:1) 40 parts, acrylic resin soln B25 part, deionized water 32.9 parts, wetting dispersing agent (TEGOdispers760) 2 parts and defoamer BYK0930.1 part; Wherein: acrylic resin soln B is by acrylic resin B (Joncryl696) 35 parts, deionized water 56.4 parts, Monoethanolamine MEA BASF 4.5 parts, diethanolamine 4.5 parts and defoamer 0.1 part, its pH value is 8.5 ~ 9.5, and the Tg value of acrylic resin B (Joncryl696) is 88, acid number is 220mgKOH/g, and molecular-weight average is 16000.
Above-mentioned flexographic plate water color ink is prepared by following method:
1, acrylic resin soln A is prepared
33 parts of aforesaid propylene acid resin A and 55.4 part deionized waters are added in reactor, after being warming up to about 70 DEG C, under agitation add 10 parts of diethanolamine, 1.5 parts of AMP-95 and 0.1 part of defoamer BYK093, and make the pH value of solution in reactor maintain 8.5 ~ 9.5, after being cooled to room temperature, obtained acrylic resin soln A.
2, aqueous color paste is prepared
35 parts of aforesaid propylene acid resin B and 56.4 part deionized waters are added in reactor, after being warming up to about 70 DEG C, under agitation add 4.5 parts of Monoethanolamine MEA BASFs, 4.5 parts of diethanolamine and 0.1 part of defoamer, and make the pH value of solution in reactor maintain 8.5 ~ 9.5, after being cooled to room temperature, obtained acrylic resin soln B.
25 parts of aforesaid propylene acid resin solution B, 32.9 parts of deionized waters, 2 parts of above-mentioned wetting dispersing agents and 0.1 part of above-mentioned defoamer are added in reactor, after stirring, add 40 parts of above-mentioned red pigments again, stir 2h under the rotating speed of 900r/min after, granularity≤10 μm are ground to, obtained aqueous color paste with sand mill.
3, flexographic plate water color ink is prepared
According to above-mentioned weight part by aforesaid propylene acid not filming emulsion and vinylformic acid filming emulsion stirring and evenly mixing under the rotating speed of 600r/min, obtained mixed emulsion; Under the rotating speed of 900r/min, in mixed emulsion, aforesaid propylene acid resin solution A is added according to weight part, after stirring and evenly mixing, continue to add above-mentioned flow agent, polyethylene wax, film coalescence aid, pH adjusting agent, defoamer and deionized water successively, after abundant stirring 10min, then add above-mentioned aqueous color paste, under the rotating speed of 500r/min after stirring and evenly mixing, filter, obtained above-mentioned flexographic plate water color ink.
Embodiment 2
The flexographic plate water color ink of the high speed printing of the present embodiment, be made up of the component of following weight part: vinylformic acid is filming emulsion 34.7 parts not, vinylformic acid filming emulsion 5 parts, acrylic resin soln A18 part, aqueous color paste 35 parts, polyethylene wax 1 part, film coalescence aid 1.5 parts, flow agent 0.5 part, defoamer 0.1 part, pH adjusting agent 0.2 part and deionized water 4 parts; Except aqueous color paste, other component is identical with embodiment 1.
Aqueous color paste is made up of the component of following weight part: yellow ultramarine (PY14) 45 parts, acrylic resin soln B26 part, deionized water 28.4 parts, wetting dispersing agent (TEGOdispers760) 1.5 parts and defoamer BYK0930.1 part; Wherein: acrylic resin soln B is identical with embodiment 1.
Above-mentioned flexographic plate water color ink is prepared by following method:
1, aqueous color paste is prepared
26 parts of aforesaid propylene acid resin solution B, 28.4 parts of deionized waters, 1.5 parts of above-mentioned wetting dispersing agents and 0.1 part of above-mentioned defoamer are added in reactor, after stirring, add 45 parts of above-mentioned yellow ultramarines again, stir 2.5h under the rotating speed of 900r/min after, granularity≤10 μm are ground to, obtained aqueous color paste with sand mill.
2, flexographic plate water color ink is prepared
According to above-mentioned weight part by aforesaid propylene acid not filming emulsion and vinylformic acid filming emulsion stirring and evenly mixing under the rotating speed of 600r/min, obtained mixed emulsion; Under the rotating speed of 900r/min, in mixed emulsion, aforesaid propylene acid resin solution A is added according to weight part, after stirring and evenly mixing, continue to add above-mentioned flow agent, polyethylene wax, film coalescence aid, pH adjusting agent, defoamer and deionized water successively, after abundant stirring 10min, then add above-mentioned aqueous color paste, under the rotating speed of 500r/min after stirring and evenly mixing, filter, obtained above-mentioned flexographic plate water color ink.
Embodiment 3
The flexographic plate water color ink of the high speed printing of the present embodiment, be made up of the component of following weight part: vinylformic acid is filming emulsion 35 parts not, vinylformic acid filming emulsion 6 parts, acrylic resin soln A17 part, aqueous color paste 35 parts, polyethylene wax 1 part, film coalescence aid 1 part, flow agent 0.5 part, defoamer 0.1 part, pH adjusting agent 0.2 part and deionized water 4.2 parts.
In above-mentioned flexographic plate water color ink:
Vinylformic acid not filming emulsion adopts ACRYLIC EMULSION IndulorSE900; Vinylformic acid filming emulsion adopts ACRYLIC EMULSION IndulorSE2872; Polyethylene wax is specially polyethylene wax AQUAACER552; Film coalescence aid is specially diethylene glycol monobutyl ether; Flow agent is specially SURFYNOL420; Defoamer is specially TEGO1488; PH adjusting agent is specially AMP-95; It is common commercially available.
Acrylic resin soln A is made up of the component of following weight part: acrylic resin A (IndulorSR10) 35 parts, deionized water 54.4 parts, diethanolamine 9 parts, AMP-951.5 part, defoamer BYK0930.1 part; Wherein the pH value of acrylic resin soln A is 8.5 ~ 9.5, and the Tg value of acrylic resin A (IndulorSR10) is 105 DEG C, and acid number is 220mgKOH/g, and molecular-weight average is 8000.
Aqueous color paste is made up of the component of following weight part: blue pigments (PB15:3) 45 parts, acrylic resin soln B25 part, deionized water 29.4 parts, wetting dispersing agent (HLD-11) 1.5 parts and defoamer TEGO14880.1 part; Wherein: acrylic resin soln B is by acrylic resin B (Joncryl690) 37 parts, deionized water 53.9 parts, Monoethanolamine MEA BASF 4.5 parts, diethanolamine 4.5 parts and defoamer 0.1 part, its pH value is 8.5 ~ 9.5, and the Tg value of acrylic resin B (Joncryl690) is 102, acid number is 240mgKOH/g, and molecular-weight average is 16500.
The preparation method that can refer to embodiment 1 prepares above-mentioned flexographic plate water color ink.
Embodiment 4
The flexographic plate water color ink of the high speed printing of the present embodiment, be made up of the component of following weight part: vinylformic acid is filming emulsion 32.4 parts not, vinylformic acid filming emulsion 5 parts, acrylic resin soln A20 part, aqueous color paste 34 parts, polyethylene wax 1 part, film coalescence aid 1.5 parts, flow agent 0.3 part, defoamer 0.1 part, pH adjusting agent 0.2 part and deionized water 5 parts; Except adopting black pigment (PBK7) to replace except blue pigments (PB15:3) in aqueous color paste, other component is identical with embodiment 3.
The preparation method that can refer to embodiment 1 prepares above-mentioned flexographic plate water color ink.
Embodiment 5
The flexographic plate water color ink of the high speed printing of the present embodiment, be made up of the component of following weight part: vinylformic acid is filming emulsion 30 parts not, vinylformic acid filming emulsion 7 parts, acrylic resin soln A16.3 part, aqueous color paste 40 parts, polyethylene wax 1 part, film coalescence aid 1 part, flow agent 0.5 part, defoamer 0.1 part, pH adjusting agent 0.1 part and deionized water 4 parts.
In above-mentioned flexographic plate water color ink, except vinylformic acid not filming emulsion employing ACRYLIC EMULSION DSMA-1091; Polyethylene wax is specially polyethylene wax D-806; Film coalescence aid is specially diethylene glycol ether; Flow agent is specially OT-75; Defoamer is specially DC65; PH adjusting agent is specially trolamine; Adopt veridian (PG7) to replace red pigment (PR57:1) outward in aqueous color paste, all the other are identical with embodiment 1.
The preparation method that can refer to embodiment 1 prepares above-mentioned flexographic plate water color ink.
Reference examples 1
The water color ink (contrast water color ink 1) of this reference examples, except the vinylformic acid not filming emulsion that employing Tg value is in the ACRYLIC EMULSION alternative embodiment 1 of 30 ~ 40 DEG C, and outside the acrylic resin soln B adopting in acrylic resin soln A alternative embodiment 1 aqueous color paste in aqueous color paste, all the other are identical with embodiment 1; And obtain this contrast water color ink 1 with reference to the preparation method of embodiment 1.
Reference examples 2
The water color ink (contrast water color ink 2) of this reference examples, be made up of the component of following weight part: vinylformic acid is filming emulsion 25 parts not, vinylformic acid filming emulsion 25 parts, acrylic resin soln A15 part, aqueous color paste 30 parts, polyethylene wax 1 part, film coalescence aid 1 part, flow agent 0.3 part, defoamer 0.1 part, pH adjusting agent 0.1 part and deionized water 2.5 parts; Wherein each composition is identical with embodiment 1, and obtains this contrast water color ink 2 with reference to the preparation method of embodiment 1.
Test example
Each contrast 600LPI used for water color ink line manual color development wheel prepared by each flexographic plate water color ink prepare embodiment 1 to 5 and reference examples 1 to 2 or the soft version of RK are worked out a draft machine, at the upper exhibit-sample of the white card (sunlight paper industry 170 Ke/㎡) of coating, to dry up or be placed in 50 DEG C of baking boxs dry 15 minutes with blower, test as follows:
GB/T13217.1-2009 method is adopted to detect color; Adopt GB/T13217.4-2008 method to detect viscosity, testing conditions is Zahn2# cup, 25 DEG C; Adopt GB/T13217.5-2008 method to detect just dryness, testing conditions is 25 DEG C; GB/T13217.3-2008 method is adopted to detect fineness; Adopt GB/T13217.2-2009 method to detect gloss, testing conditions is 60 ° of angle glossometers; QB/T2825-2006 method is adopted to detect pH value; Detected result is in table 1.
The feature of environmental protection detects: send SGS to carry out feature of environmental protection detection each water color ink, detected result shows: the feature of environmental protection of flexographic plate water color ink prepared by various embodiments of the present invention all meets ROHS and EN-71Part3 standard.
Wear resistance: adopt Jinan blue streak wear resistant instrument to detect at 2 pounds of pressure, result shows: the flexographic plate water color ink prepared of various embodiments of the present invention all can wear-resisting 100 back and forth.
Colour density: adopt Ai Seli 528 light splitting Density Measuring Instrument to carry out test record.
Printing adaptability is tested: tested on Bo Site (F & K) wide cut high-speed flexible version central cylinder type press by above-mentioned each water color ink and draw a design, wherein the water color ink printing anilox roll line number of embodiment 1 to 5 and reference examples 1 to 2 is respectively 700LPI, 700LPI, 700LPI, 800LPI, 600LPI, 700LPI, 700LPI, initial starting up speed 50 ms/min adjusts color, color mixes up rear raise speed respectively 400 ms/min and 500 ms/min of printings, testing of printed adaptability respectively, double exposure, site, levelling situation on the spot, the situations such as print speed.
The indices detected result of the water color ink of each embodiment of table 1
Test result shows:
1, the flexographic plate viscosity of water-based ink that prepared by various embodiments of the present invention is 24-25 " (Zahn2# cup, 25 DEG C), its good fluidity, and rate of drying is fast.
2, when the flexographic plate water color ink that prepared by various embodiments of the present invention prints with 400 ms/min and 500 ms/min on Bo Site (F & K) wide cut high-speed flexible version central cylinder type press, pattern, the site of printed matter are clear, colour density is high, fullness of shade is high, and glossiness is good; In addition; its double exposure performance and levelling is good on the spot; continuous printing for long time can be realized; the bad phenomenon such as scumming can not be produced; without the need to shutting down and press plate easy cleaning; illustrate that it can adapt to the high speed satellite formula machine printing of 400 meters ~ 500 ms/min preferably, and printing efficiency improves greatly.
3, compared with the water color ink prepared with embodiment 1, the water color ink that reference examples 1 makes is of light color, tinting strength is low, viscosity is high, and water color ink is printed on the machine that color saturation is inadequate, levelling is poor, cannot adapt to the high speed printing of 300 ~ 500 ms/min.
4, the water color ink of reference examples 2 making, because filming emulsion content is high, in the middle of printing process; printing personnel need repeatedly stop cleaning forme and anilox roll; have a strong impact on production rate, and after printing for some time, occur network blocking point phenomenon, continuous printing for a long time cannot be adapted at a high speed equally.
Last it is noted that above each embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (10)
1. the flexographic plate water color ink of a high speed printing, it is characterized in that, comprise the component of following weight part: vinylformic acid is filming emulsion 30 ~ 40 parts not, vinylformic acid filming emulsion 5 ~ 10 parts, acrylic resin soln 15 ~ 20 parts, aqueous color paste 30 ~ 40 parts, polyethylene wax 1 ~ 3 part, film coalescence aid 1 ~ 2 part, flow agent 0.3 ~ 1 part, defoamer 0.1 ~ 0.5 part, deionized water 3 ~ 7 parts and pH adjusting agent; Wherein, described vinylformic acid not filming emulsion is the ACRYLIC EMULSION of Tg value >=90 DEG C, described vinylformic acid filming emulsion is the ACRYLIC EMULSION of Tg value < 30 DEG C, in described aqueous color paste, the mass content of pigment is 40 ~ 45%, and described pH adjusting agent makes the pH value of flexographic plate water color ink be 8 ~ 9.5.
2. flexographic plate water color ink according to claim 1, is characterized in that, described vinylformic acid not filming emulsion is solid content 44 ~ 50%, Tg value 95 ~ 110 DEG C, acid number 50 ~ 60mgKOH/g, the ACRYLIC EMULSION of pH value 8 ~ 9.
3. flexographic plate water color ink according to claim 1, is characterized in that, described vinylformic acid filming emulsion is solid content 45 ~ 50%, Tg value 20 ~ 25 DEG C, acid number 40 ~ 55mgKOH/g, the ACRYLIC EMULSION of pH value 8 ~ 9.
4. flexographic plate water color ink according to claim 1, it is characterized in that, described acrylic resin soln comprises acrylic resin A30 ~ 40 part, deionized water 50 ~ 70 parts, defoamer 0.1 ~ 0.3 part and make the pH value of described acrylic resin soln be the pH adjusting agent of 8.5 ~ 9.5; Wherein, the Tg value of described acrylic resin A is 85 ~ 105 DEG C, and acid number is 210 ~ 230mgKOH/g, and molecular-weight average is 7000 ~ 9000.
5. flexographic plate water color ink according to claim 1, is characterized in that, described aqueous color paste comprises pigment 40 ~ 45 parts, acrylic resin soln B25 ~ 30 part, deionized water 25 ~ 35 parts, wetting dispersing agent 1 ~ 3 part and defoamer 0.1 ~ 0.3 part, wherein:
Described acrylic resin soln B comprises acrylic resin B35 ~ 40 part, deionized water 50 ~ 60 parts, defoamer 0.1 ~ 0.3 part and make the pH value of described acrylic resin soln B be the pH adjusting agent of 8.5 ~ 9.5, and the Tg value of described acrylic resin B is 85 ~ 115, acid number is 220 ~ 240mgKOH/g, and molecular-weight average is 15000 ~ 16500.
6., according to the arbitrary described flexographic plate water color ink of claim 1 to 5, it is characterized in that, described film coalescence aid be selected from propylene glycol monomethyl ether, propylene glycol, diethylene glycol monobutyl ether and diethylene glycol ether one or more.
7., according to the arbitrary described flexographic plate water color ink of claim 1 to 5, it is characterized in that, described flow agent be selected from polyether silicone, alkoxyl group alkyne diol and dioctyl Soduxin one or more.
8. the preparation method of the arbitrary described flexographic plate water color ink of claim 1 to 7, is characterized in that, comprise the steps:
According to weight part by described vinylformic acid not filming emulsion and described vinylformic acid filming emulsion stirring and evenly mixing, obtained mixed emulsion;
Under agitation, in described mixed emulsion, described acrylic resin soln is added according to weight part, after stirring and evenly mixing, continue to add described flow agent, polyethylene wax, film coalescence aid, pH adjusting agent, defoamer and deionized water, after abundant stirring, then add described aqueous color paste, after stirring and evenly mixing, filter, obtained described flexographic plate water color ink.
9. preparation method according to claim 8, is characterized in that, described acrylic resin soln is prepared by the following method:
The deionized water of the acrylic resin A and 50 ~ 70 of 30 ~ 40 parts part is added in reactor, after being warming up to 60 ~ 70 DEG C, under agitation add the defoamer of pH adjusting agent and 0.1 ~ 0.3 part, and make the pH value of solution in reactor maintain 8.5 ~ 9.5, after cooling, obtained described acrylic resin soln; Wherein, the Tg value of described acrylic resin A is 85 ~ 105 DEG C, and acid number is 210 ~ 230mgKOH/g, and molecular-weight average is 7000 ~ 9000.
10. preparation method according to claim 8 or claim 9, it is characterized in that, described aqueous color paste is prepared by the following method:
1) deionized water of the acrylic resin B and 50 ~ 60 of 35 ~ 40 parts part is added in reactor, after being warming up to 60 ~ 70 DEG C, under agitation add the defoamer of pH adjusting agent and 0.1 ~ 0.3 part, and make the pH value of solution in reactor maintain 8.5 ~ 9.5, after cooling, obtained acrylic resin soln B; Wherein, the Tg value of described acrylic resin B is 85 ~ 115, and acid number is 220 ~ 240mgKOH/g, and molecular-weight average is 15000 ~ 16500;
2) in reactor, add the defoamer of the described acrylic resin soln B of 25 ~ 30 parts, the deionized water of 25 ~ 35 parts, the wetting dispersing agent of 1 ~ 3 part and 0.1 ~ 0.3 part, after stirring, add the pigment of 40 ~ 45 parts again, stir 2 ~ 3h, be ground to granularity≤10 μm, obtained described aqueous color paste.
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