Summary of the invention
Technical problem to be solved by this invention is to provide a kind of high-resolution water-based flexographic ink.Another object of the present invention is to the preparation method that this kind of water-based flexographic ink is provided.
In order to realize above-mentioned first object, technical scheme of the present invention is: a kind of high resolving power water-based flexographic ink, comprise ink slurry and ACRYLIC EMULSION, described ink slurry comprises the following component of parts by weight: water-borne acrylic resin 20-30 part, pigment 30-60 part, dispersion agent 760W2-8 part, water 10-20 part, ethanol 10-15 part, defoamer 0.5-1 part.
In technique scheme: the content of described ink slip is 60%-70%, the content of described ACRYLIC EMULSION is 20%-30%, and all the other are solvent.
In technique scheme: described solvent is water and ethanol.
As preferably: described ink slurry comprises the following component of parts by weight: water-borne acrylic resin 25-30 part, pigment 40-50 part, dispersion agent 760W4-6 part, water 15-20 part, ethanol 10-15 part, defoamer 1 part.
The amount of pigment strengthens by ink slurry of the present invention, meanwhile, adopts dispersion agent 760W, and heavy dose of pigment can well be disperseed, and adopt water-borne acrylic resin and ACRYLIC EMULSION to be caking agent, ink stability is good, and tint permanence is good simultaneously.More than resolving power netting twine 100 line can be reached, directly can print line plate, effect and offset printing similar.And the present invention is water color ink.Meet national environmental protection policy.The printing effect of oil-based ink can be reached again simultaneously.
With ink printing of the present invention exquisite carton out, can directly print on carton, once shaped.The picture printed off is thin, color good (tradition first carries out offset printing to facial tissue, and then papered on carton by facial tissue, production efficiency is low, and cost is high).The resolving power of high line number can also embody the stereoscopic sensation of the picture printed off, and picture is exquisite, lively.Production efficiency improves, and each carton of production cost can reduce 0.5-1 unit at present.
Another object of the present invention is achieved in that a kind of preparation method of high resolving power water-based flexographic ink, completes in accordance with the following steps:
(1) water-borne acrylic resin, by claim 1, pigment, dispersion agent 760W, water, ethanol and defoamer add in homogenizer pre-dispersed, make to mix;
(2), the slurry after pre-dispersed is added sand milling in sand mill;
(3) add ACRYLIC EMULSION in the slurry, after sand milling, be uniformly mixed, add solvent simultaneously and make the viscosity of ink be painting 4 flow cup 20-30s, described solvent is water and ethanol.
As preferably: in step (1): the stirring velocity of described homogenizer is that 1000-2000 turns/min.
As preferably: in step (2), the particle diameter of the slip after sand milling is less than 10um.
As preferably: in step (3), the content of described ink slip is 60%-70%, and the content of described ACRYLIC EMULSION is 20%-30%, and described solvent is the mixing of second alcohol and water.Preparation method of the present invention ensures that pigment disperses uniformly, can avoid ACRYLIC EMULSION breakdown of emulsion again.
Beneficial effect: the amount of pigment strengthens by ink slurry of the present invention, meanwhile, adopts dispersion agent 760W, and heavy dose of pigment can be well dispersed in water, and ink stability is good, and tint permanence is good.More than resolving power netting twine 100 line can be reached, directly can print line plate, effect and offset printing similar.Can embody the stereoscopic sensation of the picture printed off, picture is exquisite, lively.And the present invention is water color ink.Meet national environmental protection policy.The printing effect of oil-based ink can be reached again simultaneously.
Embodiment
Below in conjunction with specific embodiment, the present invention is described further:
Embodiment 1
(1) the dispersion agent 760W2 part of, water-borne acrylic resin 20 parts, pigment 30 parts, Dow corning being produced, 20 parts, water, ethanol 10 parts and defoamer 1 part add in homogenizer pre-dispersed, stirring velocity is controlled by variable-frequency motor, first slowly stir, slurry is avoided to spill, then turn/speed the high-speed stirring of min with 1000-2000, make to mix;
(2), the slurry after pre-dispersed is added sand milling in sand mill; The particle diameter of the slip after sand milling is less than 10um.
(3) add ACRYLIC EMULSION in the slurry, after sand milling, wherein the quality of ACRYLIC EMULSION accounts for 20%, and the quality of slurry accounts for 70%, be uniformly mixed, add solvent makes the viscosity of ink be painting 4 flow cup 20-30s simultaneously, and described solvent is water and ethanol, and the volume ratio of water and ethanol is 2:1.Obtained ink pigment dispersing property is excellent, and good stability, places ink not thickening after month, do not unite, without the need to adding pH stablizer.
Embodiment 2
(1) the dispersion agent 760W8 part of, water-borne acrylic resin 30 parts, pigment 60 parts, Dow corning being produced, 15 parts, water, ethanol 10 parts and defoamer 0.5 part add in homogenizer pre-dispersed, stirring velocity is controlled by variable-frequency motor, first slowly stir, slurry is avoided to spill, then turn/speed the high-speed stirring of min with 1000-2000, make to mix;
(2), the slurry after pre-dispersed is added sand milling in sand mill; The particle diameter of the slip after sand milling is less than 10um.
(3) add ACRYLIC EMULSION in the slurry, after sand milling, wherein the amount of ACRYLIC EMULSION is 30%, and the amount of slurry is 60%, be uniformly mixed, add solvent makes the viscosity of ink be painting 4 flow cup 20-30s simultaneously, and described solvent is water and ethanol, and the volume ratio of water and ethanol is 1:1.Obtained ink pigment dispersing property is excellent, and good stability, places ink not thickening after month, do not unite, without the need to adding pH stablizer.
Embodiment 3
(1), water-borne acrylic resin 25 parts, pigment 50 parts, enlightening high score powder 760W6 part, 20 parts, water, ethanol 15 parts and defoamer 0.5 part are added in homogenizer pre-dispersed, stirring velocity is controlled by variable-frequency motor, first slowly stir, slurry is avoided to spill, then turn/speed the high-speed stirring of min with 1000-2000, make to mix;
(2), the slurry after pre-dispersed is added sand milling in sand mill; The particle diameter of the slip after sand milling is less than 10um.
(3) add ACRYLIC EMULSION in the slurry, after sand milling, wherein the amount of ACRYLIC EMULSION is 30%, and the amount of slurry is 60%, be uniformly mixed, add solvent makes the viscosity of ink be painting 4 flow cup 20-30s simultaneously, and described solvent is water and ethanol, and the volume ratio of water and ethanol is 2:1.Obtained ink pigment dispersing property is excellent, and good stability, places ink not thickening after month, do not unite, without the need to adding pH stablizer.
Embodiment 4
(1), water-borne acrylic resin 25 parts, pigment 50 parts, dispersion agent 18026 parts, 20 parts, water, ethanol 15 parts and defoamer 0.5 part are added in homogenizer pre-dispersed, stirring velocity is controlled by variable-frequency motor, first slowly stir, slurry is avoided to spill, then turn/speed the high-speed stirring of min with 1000-2000, make to mix;
(2), the slurry after pre-dispersed is added sand milling in sand mill; The particle diameter of the slip after sand milling is less than 10um.
(3) add ACRYLIC EMULSION in the slurry, after sand milling, wherein the amount of ACRYLIC EMULSION is 30%, and the amount of slurry is 60%, be uniformly mixed, add solvent makes the viscosity of ink be painting 4 flow cup 20-30s simultaneously, and described solvent is water and ethanol, and the volume ratio of water and ethanol is 2:1.Obtained ink pigment dispersing property is poor, in stability, places ink unity after one month, need add pH stablizer.
Embodiment 5
(1), water-borne acrylic resin 25 parts, pigment 50 parts, enlightening high score powder 752W6 part, 20 parts, water, ethanol 15 parts and defoamer 0.5 part are added in homogenizer pre-dispersed, stirring velocity is controlled by variable-frequency motor, first slowly stir, slurry is avoided to spill, then turn/speed the high-speed stirring of min with 1000-2000, make to mix;
(2), the slurry after pre-dispersed is added sand milling in sand mill; The particle diameter of the slip after sand milling is less than 10um.
(3) add ACRYLIC EMULSION in the slurry, after sand milling, wherein the amount of ACRYLIC EMULSION is 30%, and the amount of slurry is 60%, be uniformly mixed, add solvent makes the viscosity of ink be painting 4 flow cup 20-30s simultaneously, and described solvent is water and ethanol, and the volume ratio of water and ethanol is 2:1.Obtained ink pigment dispersing property is poor, in stability, places ink unity after one month, need add pH stablizer.
Embodiment 6
(1), water-borne acrylic resin 15 parts, pigment 25 parts, DOW CORNING dispersion agent 760W6 part, 20 parts, water, ethanol 15 parts and defoamer 0.5 part are added in homogenizer pre-dispersed, stirring velocity is controlled by variable-frequency motor, first slowly stir, slurry is avoided to spill, then turn/speed the high-speed stirring of min with 1000-2000, make to mix;
(2), the slurry after pre-dispersed is added sand milling in sand mill; The particle diameter of the slip after sand milling is less than 10um.
(3) add ACRYLIC EMULSION in the slurry, after sand milling, wherein the amount of ACRYLIC EMULSION is 30%, and the amount of slurry is 60%, be uniformly mixed, add solvent makes the viscosity of ink be painting 4 flow cup 20-30s simultaneously, and described solvent is water and ethanol, and the volume ratio of water and ethanol is 2:1.Obtained ink pigment dispersing property is excellent, and good stability, places ink not thickening after month, do not unite, without the need to adding pH stablizer.But resolving power can not reach more than netting twine 100 line, well can not embody the stereoscopic sensation of the picture printed off, printing effect is poor.
Embodiment 7
(1), maleic acid resin 25 parts, pigment 50 parts, enlightening high score powder 760W4 part, 20 parts, water, ethanol 15 parts and defoamer 0.5 part are added in homogenizer pre-dispersed, stirring velocity is controlled by variable-frequency motor, first slowly stir, slurry is avoided to spill, then turn/speed the high-speed stirring of min with 1000-2000, make to mix;
(2), the slurry after pre-dispersed is added sand milling in sand mill; The particle diameter of the slip after sand milling is less than 10um.
(3) add ACRYLIC EMULSION in the slurry, after sand milling, wherein the amount of ACRYLIC EMULSION is 30%, and the amount of slurry is 60%, be uniformly mixed, add solvent makes the viscosity of ink be painting 4 flow cup 20-30s simultaneously, and described solvent is water and ethanol, and the volume ratio of water and ethanol is 2:1.Obtained ink pigment dispersing property is excellent, and good stability, places ink not thickening after month, do not unite, without the need to adding pH stablizer.
In sum, adopt the combination in formula range of the present invention, good resolving power can be reached, be more than netting twine 100 line.Meanwhile, ink stability is good, and dispersion effect is good.As long as any combination in the present invention's formula, all falls within the scope of protection of the present invention.