Summary of the invention
Technical problem to be solved by this invention is, overcomes the deficiencies in the prior art, provide a kind of viscosity low, be convenient to clean, bright in luster and free from corrosion a kind of aqueous flexible plate printing ink and preparation method thereof.
The technical solution adopted for the present invention to solve the technical problems is: this aqueous flexible plate printing ink is characterized in that the weight percent content of a component is respectively:
Pigment 30～35%, acrylic resin 25～32%, defoamer 0.2～0.5%, ethylene glycol monomethyl ether 2～5%, wax slurry 1.0～2.5%, flow agent 0.9～1.5%, water 23～30%.
The further feature of this aqueous flexible plate printing ink is:
Pigment is water-based paint;
Acrylic resin is multifunctional acrylic resin;
Defoamer is efficiently to contain silicon defoaming agent;
The wax slurry is a polyamide wax;
Flow agent is the organosilicon flow agent.
The preparation method of this aqueous flexible plate printing ink, it has following operation successively:
(1), mill base grinds: pigment class is placed agitator, slowly add acrylic resin during stirring at low speed, all dissolve until acrylic resin; Mixture after the dissolving places sand mill to grind, and makes the mill base fineness be less than or equal to 15 microns;
(2), Water-borne modification handles: the mill base after (1) is ground place the stirring of agitator high speed, and to be neutralized to the pH value is 8.5～9.5;
(3), ink formulation: ACRYLIC EMULSION, defoamer, wax, flow agent and water are added in the mill base after (2) Water-borne modification is handled successively, mix, water is regulated viscosity to 40～80 second, with homemade Tu Shi 4# cup 25 ℃ of measurements down.
The invention has the beneficial effects as follows: component novelty, batching science, preparation is simple, cost is lower; This aqueous flexible plate printing ink China ink matter exquisiteness, gloss is soft, color saturation is high, bright in luster; Rate of drying is fast, can the site double exposure, chromatography; Good water solubility, easy cleaning, to the printing roller non-corrosiveness; Viscosity is low, look content height, the transparency be with printing adaptability is good, suitable polychrome machine high speed printing, is specially adapted to the polychrome machine to quick prints such as ivory board, craft paper, overlay papers; The fastness to rubbing height, be not easy to decolour, color gamut is wide,, the requirement that can satisfy high-grade printing close with standard color sample; In addition, this printing ink meets the ROHS of European Union standard, and is low to topsoil, and it is residual not have noxious solvent, helps safety in production and environment protection.
Embodiment
Aqueous flexible plate printing ink of the present invention, the weight percent of its component is: pigment 30～35%, acrylic resin 25～32%, defoamer 0.2～0.5%, ethylene glycol monomethyl ether 2～5%, wax slurry 1.0～2.5%, flow agent 0.9～1.5%, water 23～30%.
Embodiment 1:
Measuring weight by prescription is 35% pigment, 30% acrylic resin, 0.2% defoamer, 3.8% ethylene glycol monomethyl ether, 1.8% wax slurry, 1.2% flow agent, 28% water.Pigment class is placed agitator, slowly add acrylic resin during stirring at low speed, all dissolve until acrylic resin; Mixture after the dissolving places sand mill to grind, and makes the mill base fineness be less than or equal to 15 microns; With the mill base after grinding, place the agitator high speed to stir, and to be neutralized to the pH value be 8.5～9.5; ACRYLIC EMULSION, defoamer, wax, flow agent and water are added successively in the mill base after Water-borne modification is handled again, mix, water is regulated viscosity to 40～80 second, with homemade Tu Shi 4# cup 25 ℃ of measurements down.
The printing ink for preparing is carried out following check:
One, viscosity check
Use instrument: homemade Tu Shi 4# cup, electricity are in stopwatch, thermometer, frozen water
Operation steps:
1, is cooled to the ink of frozen water: 30 ℃, measure with thermometer with firm discharging;
2, then pour 30 ℃ of inks into homemade Tu Shi 4# cup;
3, measure whole inks with electronic stopclock and flow out the needed time, show with stopwatch by aperture.
(general cutout just can be by stopwatch less than 3 centimetres)
Two, pH value check
Use instrument: portable pH value meter, pH value 6.86 standardized solution
Operation steps:
1 usefulness pure water cleans pH value meter electrode, and electrode is placed in pH value 6.86 standardized solution, and it is static to stir the back, places to make displayed value stable, proofreaies and correct and finishes the back with pure water cleaning electrode and drying;
2 place ink with the electrode that cleans up, and stir the static placement in back a little, and the stable back of displayed value reading is the pH value of this ink.
Three, fineness check
Use instrument: Hegman grind gage, scraper, magnifying glass (5 to 10 times)
Operation steps:
1, ink is dripped in 50 microns groove scale places;
2, keep the vertical 90 degree operation both hands of scraper evenly firmly to scrape slowly from top to bottom and stop, making ink be full of the Hegman grind gage groove to the zero mark place with scraper plate;
3, scrape after, immediately with scraper plate with 30 the degree angles tiltedly to light source, inspect the intensive numerical value of particulate with magnifying glass.(surpass 15 particles in every scale range and count a scale numerical value in, be no more than 15 particles, calculate next scale numerical value)
Precaution:
1, both hands are horizontal when holding scraper, and are firmly unsuitable too quickly, do not lay particular stress on Yi Bian make, and fineness board slot both sides ink is outward wanted scraping;
2, the check of ink fineness will repeat 2 to 3 times, gets its mean value, answers retry if differ 1 scale.
Embodiment 2:
Measuring weight by prescription is 33% pigment, 29% acrylic resin, 0.3% defoamer, 4.7% ethylene glycol monomethyl ether, 1.6% wax slurry, 1.4% flow agent, 30% water.Pigment class is placed agitator, slowly add acrylic resin during stirring at low speed, all dissolve until acrylic resin; Mixture after the dissolving places sand mill to grind, and makes the mill base fineness be less than or equal to 15 microns; With the mill base after grinding, place the agitator high speed to stir, and to be neutralized to the pH value be 8.5～9.5; ACRYLIC EMULSION, defoamer, wax, flow agent and water are added successively in the mill base after Water-borne modification is handled again, mix, water is regulated viscosity to 40～80 second, with homemade Tu Shi 4# cup 25 ℃ of measurements down.
The method of inspection of parameters is as described in the enforcement mode 1.
Embodiment 3:
Measuring weight by prescription is 32% pigment, 29% acrylic resin, 0.5% defoamer, 4.5% ethylene glycol monomethyl ether, 2.5% wax slurry, 1.5% flow agent, 30% water.Pigment class is placed agitator, slowly add acrylic resin during stirring at low speed, all dissolve until acrylic resin; Mixture after the dissolving places sand mill to grind, and makes the mill base fineness be less than or equal to 15 microns; With the mill base after grinding, place the agitator high speed to stir, and to be neutralized to the pH value be 8.5～9.5; ACRYLIC EMULSION, defoamer, wax, flow agent and water are added successively in the mill base after Water-borne modification is handled again, mix, water is regulated viscosity to 40～80 second, with homemade Tu Shi 4# cup 25 ℃ of measurements down.
The method of inspection of parameters is as described in the enforcement mode 1.
Embodiment 4:
Measuring weight by prescription is 33% pigment, 30% acrylic resin, 0.3% defoamer, 4.7% ethylene glycol monomethyl ether, 1.8% wax slurry, 1.2% flow agent, 29% water.Pigment class is placed agitator, slowly add acrylic resin during stirring at low speed, all dissolve until acrylic resin; Mixture after the dissolving places sand mill to grind, and makes the mill base fineness be less than or equal to 15 microns; With the mill base after grinding, place the agitator high speed to stir, and to be neutralized to the pH value be 8.5～9.5; ACRYLIC EMULSION, defoamer, wax, flow agent and water are added successively in the mill base after Water-borne modification is handled again, mix, water is regulated viscosity to 40～80 second, with homemade Tu Shi 4# cup 25 ℃ of measurements down.
The method of inspection of parameters is as described in the enforcement mode 1.
Embodiment 5:
Measuring weight by prescription is 30.8% pigment, 31% acrylic resin, 0.5% defoamer, 4.6% ethylene glycol monomethyl ether, 1.8% wax slurry, 1.3% flow agent, 30% water.Pigment class is placed agitator, slowly add acrylic resin during stirring at low speed, all dissolve until acrylic resin; Mixture after the dissolving places sand mill to grind, and makes the mill base fineness be less than or equal to 15 microns; With the mill base after grinding, place the agitator high speed to stir, and to be neutralized to the pH value be 8.5～9.5; ACRYLIC EMULSION, defoamer, wax, flow agent and water are added successively in the mill base after Water-borne modification is handled again, mix, water is regulated viscosity to 40～80 second, with homemade Tu Shi 4# cup 25 ℃ of measurements down.
The method of inspection of parameters is as described in the enforcement mode 1.
Embodiment 6:
Measuring weight by prescription is 35% pigment, 32% acrylic resin, 0.5% defoamer, 5% ethylene glycol monomethyl ether, 2.5% wax slurry, 1.5% flow agent, 23.5% water.Pigment class is placed agitator, slowly add acrylic resin during stirring at low speed, all dissolve until acrylic resin; Mixture after the dissolving places sand mill to grind, and makes the mill base fineness be less than or equal to 15 microns; With the mill base after grinding, place the agitator high speed to stir, and to be neutralized to the pH value be 8.5～9.5; ACRYLIC EMULSION, defoamer, wax, flow agent and water are added successively in the mill base after Water-borne modification is handled again, mix, water is regulated viscosity to 40～80 second, with homemade Tu Shi 4# cup 25 ℃ of measurements down.
The method of inspection of parameters is as described in the enforcement mode 1.
The technical parameter for preparing aqueous flexible plate printing ink by above-mentioned embodiment is as follows:
Outward appearance: coloured oily liquids
Smell: sweet taste, monomer flavor
PH value: 8.5-9.5
Viscosity: 40-80 second/be coated with homemade Tu Shi 4# cup, 25 ℃
Fineness :≤15 microns
Color: similar to standard color sample
Environmental protection: meet the ROHS of European Union standard
Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.