CN109943144A - A kind of preparation method of plastic film flexographic printing water-based ink - Google Patents
A kind of preparation method of plastic film flexographic printing water-based ink Download PDFInfo
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Abstract
The present invention relates to a kind of plastic film preparation methods of flexographic printing water-based ink, comprising: 1) emulsion polymerization prepares water-and acrylate lotion；2) it takes dicyclopentadiene acrylate resin, hydroxyethyl cellulose, emulsifier and isopropanol to be added to the water and prepares aqueous dicyclopentadiene acrylate lotion；3) mill base is made in aqueous dicyclopentadiene acrylate lotion and pigment, dispersing agent, defoaming agent and part water；Mill base, water-and acrylate lotion, substrate wetting agents, levelling agent, fumed silica are added in remaining water again and mixed to obtain the final product.Gained water-based ink items basic performance is excellent, meet the requirement of flexographic printing, printing adhesive force on plastic film especially polyolefin film is big, adhesion-tight degree is high, gained ink film intensity is high, no water wave phenomenon, and with excellent anti-dry/wet friction, anti-rubbing property and resistance to marring, printing quality is high, prints suitable for by the package of stock of plastic film.
Description
Technical field
The invention belongs to water-based ink technical fields, and in particular to a kind of system of plastic film flexographic printing water-based ink
Preparation Method.
Background technique
As the fast development of industrial sector and living standard greatly improve, people increasingly pay attention to environmental protection and green
Color safety.The VOCs discharge amount of packages printing industry increases year by year, gradually causes the concern of people；Traditional Packing printing industry face
Face transition pressure, under the guidance of " green printing " concept, flexography process and water-based ink are developed.
Water-based ink be based on water, by aqueous high molecular compound as binder, with pigment, auxiliary agent through design,
A kind of environmentally friendly printing ink made of allotment, grinding stirring and processing.Compared with traditional solvent-based ink, water-based ink with
Water replaces solvent of the tradition based on benzene class, and having can be reduced VOCs discharge, reduce printed matter surface residual poisonous substance, reduce resource
Consumption reduces environmentally friendly cost, improves the characteristics of operating environment safety, packing and decorating printing is mainly used in, especially to peace
Entirely, the package printed matters such as environmental protection, health requirements high food, tobacco and wine, toy for children.
Water-based ink is mainly made of waterborne binder, pigment, auxiliary agent and four part of solvent.Wherein, waterborne binder master
If water-base resin, including water-soluble resin, water-soluble gum resin and water dispersed resin (emulsion polymer), be ink main body at
Point, the basic framework of printing film layer is constituted, there is very big shadow to the viscosity of ink, adhesive force, gloss, drying and printability
It rings.Pigment different color for rendering, satisfies the use demand.Auxiliary agent mainly have defoaming agent, stabilizer, wetting agent, thickener,
Levelling agent, coalescing agent etc. improve ink film performance for improving printability.Solvent is based on water, or a small amount of alcohols of addition helps
Solvent adjusts viscosity and rate of drying for dispersing binder and colorant.
Flexographic printing is a kind of direct relief printing plate rotary printing mode, can print to liquid or paste ink biography on stock,
Have the characteristics that printable fabric is extensive, printing effect is good, machine construction is simple, printing format is flexible, high speed, at low cost, soft version
Printing technology is especially suitable for using water-based ink because ink consumption amount is few.Flexographic printing water-based ink is according to the difference of stock
Be divided into paper base dielectric printing to be used with non-absorbing dielectric printing: paper base medium includes art paper, corrugated paper, newspaper, sanitary napkins
Paper etc., water-based ink used is almost the same in the selection of binder, can meet use by adjusting host and additive and want
It asks.Non-absorbing medium such as plastic film occupies very important status in packages printing industry, at present the maximum polyene of usage amount
Hydrocarbon film, plastic film cause its surface can lower, solubility because of factors such as its molecular structure, polar group and crystallization degrees
Parameter is small, surface is smooth, is easy to produce electrostatic, and the surface tension of water is larger, and water-based ink is in Plastic film surface adhesive force
It is small, attachment fastness is inadequate, sprawls uneven, hiding rare is low, slow drying speed, and printing effect is bad, to limit soft version print
Fast development of the brush water-based ink in plastic film packaging industry.
Summary of the invention
The object of the present invention is to provide a kind of preparation methods of above-mentioned plastic film flexographic printing water-based ink, improve
The adhesive force of water-based ink on a plastic film, printing effect are good.
To achieve the goals above, the technical scheme adopted by the invention is as follows:
A kind of preparation method of plastic film flexographic printing water-based ink, comprising the following steps:
1) water-and acrylate lotion is prepared:
Raw material monomer methyl methacrylate, butyl acrylate, acrylic acid, the hydroxypropyl acrylate is taken to be according to mass ratio
25:(13-14): (1.5-2.0): the ratio of (0.5-1.0) is uniformly mixed, and obtains monomer mixture；
A small amount of monomer mixture and emulsifier, buffer are added to the water, 76 DEG C -78 DEG C are heated to after mixing, is added few
Initiator is measured, 82 DEG C -84 DEG C is warming up to and is reacted, residual monomer mixture and initiator are added after 30-40min, is warming up to
88 DEG C of -90 DEG C of reaction 2-3h, after be cooled to room temperature, adjusting pH value is 7.5-8.0, and it is 40%-42% that solid content, which is obtained by filtration,
Water-and acrylate lotion, it is spare；
2) aqueous dicyclopentadiene acrylate lotion is prepared:
Dicyclopentadiene acrylate resin, hydroxyethyl cellulose, emulsifier and isopropanol is taken to be added to the water, shear agitation
And grind, the aqueous dicyclopentadiene acrylate lotion that solid content is 40%-42% is obtained, it is spare；
3) water-based ink is deployed:
Part water is added in aqueous dicyclopentadiene acrylate lotion obtained by step 2) and pigment, dispersing agent, defoaming agent
In, stir it is pre-dispersed after, clipped stirring simultaneously grinds mill base is made；Again by water-and acrylate obtained by gained mill base and step 1)
Lotion, substrate wetting agents, levelling agent, fumed silica are added in remaining water, filter after being dispersed with stirring, and are adjusted with pH stabilizer
PH value to 8.5-9.0 to get.
In step 1), the emulsifier is NP-10 and the mass ratio of SE-10N is 1:(0.5-0.55) mixture；It is described
The dosage of emulsifier is the 4%-5% of monomer mixture gross mass.
In step 1), the buffer is sodium bicarbonate, and dosage is the 1.0%-1.5% of monomer mixture gross mass；Institute
Stating initiator is ammonium persulfate, and dosage is the 0.4%-0.5% of monomer mixture gross mass.
In step 2), mass percent of the hydroxyethyl cellulose in the aqueous dicyclopentadiene acrylate lotion of gained
For 3%-4%.
In step 2), the emulsifier is NP-10 and the mass ratio of SDS is 1:(0.65-0.70) mixture；The cream
The dosage of agent is that dicyclopentadiene acrylate resin quality is 4%-5%.
In step 2), the isopropanol is 5%- in the mass percent of the aqueous dicyclopentadiene acrylate lotion of gained
6%.
In step 2), the grinding, which refers to, carries out ball milling, speed 900-1000r/min, time using planetary ball mill
For 2-2.5h.
In step 3), water-based ink: water-and acrylate lotion 45%-48%, water is deployed according to following mass percent
Property dicyclopentadiene acrylate lotion 10%-12%, pigment 15%-18%, defoaming agent 0.5%-0.8%, dispersing agent
0.8%-1.0%, substrate wetting agents 0.5%-0.8%, levelling agent 0.5%-0.8%, fumed silica 0.5%-1.0%,
Surplus is water and pH stabilizer.The pH stabilizer is triethanolamine.
In step 3), the grinding, which refers to, carries out ball milling using planetary ball mill, and speed 700-800r/min, the time is
2-2.5h。
In the preparation method of plastic film of the invention with flexographic printing water-based ink, using aqueous dicyclopentadiene propylene
Acid esters lotion replaces least a portion of water-and acrylate lotion, that is, uses water-and acrylate lotion and aqueous dicyclopentadiene third
Olefin(e) acid ester latex composite compounding is as binder, and the two is acrylic emulsion, and compatibility is good, is easily dispersed.Due to bicyclic penta
Contain unsaturated cyclopentene structure in diene acrylate molecule, complicated molecular structure is tangled with acrylate molecule, is formed
Three-dimensional space crosslinking, improves water-based ink internal adhesion and cohesive force；Insatiable hunger in dicyclopentadiene acrylate molecule
Similar to the plastic film of polyolefins to mix with cyclopentene structure, when being in contact with surface of the stock, affinity is stronger, more
It is easy diffusion attachment and uniformly sprawls, contact area is big, and printing effect is good, is not likely to produce water wave phenomenon；In ink film solidification process
In, the unsaturated ring amylene structure in dicyclopentadiene acrylate molecule can collide oxidation with the oxygen in environment or in ink
For cyclopentadienyl alcohol, the hydroxyl contained increases the adhesive force and attachment fastness of ink film film layer and plastic film substrate after solidifying,
Improve the rub resistance energy of printing ink film.Simultaneously as the cure shrinkage of dicyclopentadiene acrylate is low, after solidification
Ink film consistency is high, and hardness is big, and intensity is high, to improve the rub resistance and adhesion strength of ink film.
In the preparation method of plastic film of the invention with flexographic printing water-based ink, using water-and acrylate lotion and
Aqueous dicyclopentadiene acrylate latex composite compounding is as binder, when preparing water-and acrylate lotion, using methyl-prop
These four monomers of e pioic acid methyl ester, butyl acrylate, acrylic acid, hydroxypropyl acrylate as raw material, scientific design monomer ratio.
Methyl methacrylate is mainly used for improving adhesive force, hardness and the resistance to soiling of acrylate polymer as hard monomer；Propylene
Acid butyl ester is mainly used for improving the flexibility of acrylate polymer, improves filming performance as soft monomer；Acrylic acid is as function
Energy monomer, can improve oil resistivity, the solvent-resisting of acrylate polymer, moreover it is possible to improve acrylate polymer by being crosslinked
Adhesive force, hardness and wearability, hydroxypropyl acrylate is as function monomer, for enhancing crosslinked polymer ability to cure, and
Reach better water-soluble effect using the hydroxyl that it has.Gained water-and acrylate lotion has good dispersibility and film forming
Property, it is suitable for flexographic printing water-based ink, glass transition temperature is low, and rate of drying is fast, and film-formation result is good.
In the preparation method of plastic film of the invention with flexographic printing water-based ink, using water-and acrylate lotion and
Aqueous dicyclopentadiene acrylate latex composite compounding is as binder, when preparing aqueous dicyclopentadiene acrylate lotion,
It is that dicyclopentadiene acrylate resin, hydroxyethyl cellulose, emulsifier and isopropanol are dispersed in water to manufactured, isopropanol
Disperse as cosolvent help, hydroxyethyl cellulose enhances emulsion intercalation method as protecting colloid substance.
Preparation method of the invention uses water-and acrylate lotion and aqueous dicyclopentadiene acrylate latex composite compounding
As binder, it is aided with defoaming agent, dispersing agent, substrate wetting agents, levelling agent, fumed silica and pH stabilizer, with pigment
It is mixed with flexographic printing water-based ink with water, gained water-based ink items basic performance is excellent, and storage stability is qualified, meets
The requirement of flexographic printing water-based ink；The resulting flexographic printing water-based ink of the present invention is (especially poly- in plastic film
Alkene film, such as PP film) on printing adhesive force it is big, adhesion-tight degree is high, and gained ink film intensity is high, and printed matter is existing without water wave
As, and with excellent anti-dry/wet friction, anti-rubbing property and resistance to marring, printing quality is high, suitable for plastic film
It is printed for the package of stock.
The present invention is when preparing plastic film flexographic printing water-based ink, first by aqueous dicyclopentadiene acrylate cream
Liquid and pigment, dispersing agent, defoaming agent are added in the water of part, stir it is pre-dispersed after shear agitation and grind mill base be made, then by institute
It obtains mill base and water-and acrylate lotion and remaining ingredient is mixed with water-based ink, the dispersion effect of this method is good, ink particle
Son is uniformly dispersed, not easy to reunite and precipitating；Gained water-based ink performance is stablized, and storage time is long, and using effect is good；This method work
Skill is simple, easy to operate, is suitble to promote the use of.
Specific embodiment
The present invention is described further With reference to embodiment.
In specific embodiment, when modulating water-based ink, pigment used is phthalocyanine blue BGS, commercial goods；Defoaming used
Agent is Digao TEGO Twin 4000, commercial goods；Dispersing agent used is Digao TEGO Dispers 760W dispersing agent, commercially available
Commodity；Substrate wetting agents used are Digao TEGO DO75 wetting agent, commercial goods；Levelling agent used is Digao TEGO
Glide100 levelling agent, commercial goods.
In specific embodiment, dicyclopentadiene acrylate resin used is commercial goods, DCPA L-6101, density
For 1.1g/cm3, viscosity is 20cps (25 DEG C), acid value≤2mgKOH (25 DEG C).Hydroxyethyl cellulose used is commercial goods, pottery
Family name (HEC) QP-52000H.
Embodiment 1
The plastic film of the present embodiment flexographic printing water-based ink, consists of the following mass percentage components: aqueous
Acrylic acid ester emulsion 45%, aqueous dicyclopentadiene acrylate lotion 12%, pigment 17%, defoaming agent 0.5%, dispersing agent
0.9%, substrate wetting agents 0.7%, levelling agent 0.8%, fumed silica 0.8%, surplus are three ethyl alcohol of water and pH stabilizer
Amine, the pH value of the water-based ink are 8.5-9.0.
The preparation method of the plastic film of the present embodiment flexographic printing water-based ink, comprising the following steps:
1) water-and acrylate lotion is prepared:
Raw material monomer methyl methacrylate, butyl acrylate, acrylic acid, the hydroxypropyl acrylate is taken to be according to mass ratio
The ratio of 25:13:1.5:0.5 is uniformly mixed, and obtains monomer mixture；
1/10 monomer mixture and the first emulsifier, buffer sodium bicarbonate are added to the water, 76 DEG C are heated to after mixing,
1/5 initiator ammonium persulfate is added, is warming up to 82 DEG C and is reacted, residual monomer mixture and initiator are added after 40min, rises
Temperature to 88 DEG C of reaction 3h, after be cooled to room temperature, adjusting pH value with ammonium hydroxide is 8.0, and aqueous third that solid content is 40% is obtained by filtration
Olefin(e) acid ester lotion, it is spare；
Wherein, the mixture that first emulsifier is NP-10 and the mass ratio of SE-10N is 1:0.50, the first emulsifier
Dosage be monomer mixture gross mass 5%；The buffer dosage is the 1.5% of monomer mixture gross mass；Initiator
Dosage is the 0.5% of monomer mixture gross mass；
2) aqueous dicyclopentadiene acrylate lotion is prepared:
It takes dicyclopentadiene acrylate resin, hydroxyethyl cellulose, the second emulsifier and isopropanol to be added to the water, shears
Stirring is placed in planetary ball mill and grinds 2h with the speed of 1000r/min, obtains aqueous bicyclic penta 2 that solid content is 40%
Alkene acrylic acid ester emulsion, it is spare；
Wherein, the hydroxyethyl cellulose is 3.0% in the mass percent of aqueous dicyclopentadiene acrylate lotion；
The mixture that second emulsifier is NP-10 and the mass ratio of SDS is 1:0.65, dosage are dicyclopentadiene acrylate tree
Lipid amount is 4%；The isopropanol is 5% in the mass percent of aqueous dicyclopentadiene acrylate lotion；
3) water-based ink is deployed:
1/2 water is added in aqueous dicyclopentadiene acrylate lotion obtained by step 2) and pigment, dispersing agent, defoaming agent
In, after stirring is pre-dispersed, after clipped stirring, it is placed in planetary ball mill and color is made with the speed grinding 2.5h of 800r/min
Slurry；Gained mill base and water-and acrylate lotion, substrate wetting agents, levelling agent, fumed silica obtained by step 1) are added again
Enter in remaining water, with 200 mesh filter-cloth filterings after being dispersed with stirring, adjusts pH value to 8.5-9.0 to get the plastics with pH stabilizer
Film flexographic printing water-based ink.
Embodiment 2
The plastic film of the present embodiment flexographic printing water-based ink, consists of the following mass percentage components: aqueous
Acrylic acid ester emulsion 48%, aqueous dicyclopentadiene acrylate lotion 10%, pigment 17%, defoaming agent 0.6%, dispersing agent
1.0%, substrate wetting agents 0.6%, levelling agent 0.6%, fumed silica 0.9%, surplus are three ethyl alcohol of water and pH stabilizer
Amine, the pH value of the water-based ink are 8.5-9.0.
The preparation method of the plastic film of the present embodiment flexographic printing water-based ink, comprising the following steps:
1) water-and acrylate lotion is prepared:
Raw material monomer methyl methacrylate, butyl acrylate, acrylic acid, the hydroxypropyl acrylate is taken to be according to mass ratio
The ratio of 25:13.5:1.7:0.8 is uniformly mixed, and obtains monomer mixture；
1/10 monomer mixture and the first emulsifier, buffer sodium bicarbonate are added to the water, 78 DEG C are heated to after mixing,
1/5 initiator ammonium persulfate is added, is warming up to 84 DEG C and is reacted, residual monomer mixture and initiator are added after 35min, rises
Temperature to 90 DEG C of reaction 2h, after be cooled to room temperature, adjusting pH value with ammonium hydroxide is 7.5-8.0, and the water that solid content is 41% is obtained by filtration
Property acrylic acid ester emulsion, it is spare；
Wherein, the mixture that first emulsifier is NP-10 and the mass ratio of SE-10N is 1:0.55, the first emulsifier
Dosage be monomer mixture gross mass 4.5%；The buffer dosage is the 1.2% of monomer mixture gross mass；Cause
Agent dosage is the 0.45% of monomer mixture gross mass；
2) aqueous dicyclopentadiene acrylate lotion is prepared:
It takes dicyclopentadiene acrylate resin, hydroxyethyl cellulose, the second emulsifier and isopropanol to be added to the water, shears
Stirring is placed in planetary ball mill and grinds 2.5h with the speed of 900r/min, obtains aqueous bicyclic penta 2 that solid content is 41%
Alkene acrylic acid ester emulsion, it is spare；
Wherein, the hydroxyethyl cellulose is 3.5% in the mass percent of aqueous dicyclopentadiene acrylate lotion；
The mixture that second emulsifier is NP-10 and the mass ratio of SDS is 1:0.70, dosage are dicyclopentadiene acrylate tree
Lipid amount is 4.5%；The isopropanol is 5.5% in the mass percent of aqueous dicyclopentadiene acrylate lotion；
3) water-based ink is deployed:
1/2 water is added in aqueous dicyclopentadiene acrylate lotion obtained by step 2) and pigment, dispersing agent, defoaming agent
In, after stirring is pre-dispersed, after clipped stirring, it is placed in planetary ball mill and mill base is made with the speed grinding 2h of 800r/min；
Water-and acrylate lotion, substrate wetting agents obtained by gained mill base and step 1), levelling agent, fumed silica are added again surplus
Yu Shuizhong adjusts pH value to 8.5-9.0 to get the plastic film with pH stabilizer with 200 mesh filter-cloth filterings after being dispersed with stirring
With flexographic printing water-based ink.
Embodiment 3
The plastic film of the present embodiment flexographic printing water-based ink, consists of the following mass percentage components: aqueous
Acrylic acid ester emulsion 46%, aqueous dicyclopentadiene acrylate lotion 11%, pigment 17%, defoaming agent 0.7%, dispersing agent
0.8%, substrate wetting agents 0.8%, levelling agent 0.5%, fumed silica 1.0%, surplus are three ethyl alcohol of water and pH stabilizer
Amine, the pH value of the water-based ink are 8.5-9.0.
The preparation method of the plastic film of the present embodiment flexographic printing water-based ink, comprising the following steps:
1) water-and acrylate lotion is prepared:
Raw material monomer methyl methacrylate, butyl acrylate, acrylic acid, the hydroxypropyl acrylate is taken to be according to mass ratio
The ratio of 25:14:2.0:1.0 is uniformly mixed, and obtains monomer mixture；
1/10 monomer mixture and the first emulsifier, buffer sodium bicarbonate are added to the water, 77 DEG C are heated to after mixing,
1/5 initiator ammonium persulfate is added, is warming up to 83 DEG C and is reacted, residual monomer mixture and initiator are added after 30min, rises
Temperature to 89 DEG C of reaction 2.5h, after be cooled to room temperature, adjusting pH value with ammonium hydroxide is 7.5-8.0, and it is 42% that solid content, which is obtained by filtration,
Water-and acrylate lotion, it is spare；
Wherein, the mixture that first emulsifier is NP-10 and the mass ratio of SE-10N is 1:0.50, the first emulsifier
Dosage be monomer mixture gross mass 4%；The buffer dosage is the 1.0% of monomer mixture gross mass；Initiator
Dosage is the 0.4% of monomer mixture gross mass；
2) aqueous dicyclopentadiene acrylate lotion is prepared:
It takes dicyclopentadiene acrylate resin, hydroxyethyl cellulose, the second emulsifier and isopropanol to be added to the water, shears
Stirring is placed in planetary ball mill and grinds 2.5h with the speed of 1000r/min, obtains aqueous bicyclic penta that solid content is 42%
Diene acrylic acid ester emulsion, it is spare；
Wherein, the hydroxyethyl cellulose is 4% in the mass percent of aqueous dicyclopentadiene acrylate lotion；Institute
The mixture that the second emulsifier is NP-10 and the mass ratio of SDS is 1:0.70 is stated, dosage is dicyclopentadiene acrylate resin
Quality is 5%；The isopropanol is 6% in the mass percent of aqueous dicyclopentadiene acrylate lotion；
3) water-based ink is deployed:
1/2 water is added in aqueous dicyclopentadiene acrylate lotion obtained by step 2) and pigment, dispersing agent, defoaming agent
In, after stirring is pre-dispersed, after clipped stirring, it is placed in planetary ball mill and color is made with the speed grinding 2.5h of 700r/min
Slurry；Gained mill base and water-and acrylate lotion, substrate wetting agents, levelling agent, fumed silica obtained by step 1) are added again
Enter in remaining water, with 200 mesh filter-cloth filterings after being dispersed with stirring, adjusts pH value to 8.5-9.0 to get the plastics with pH stabilizer
Film flexographic printing water-based ink.
Experimental example
Basic performance and service performance of this experimental example to plastic film flexographic printing water-based ink obtained by embodiment 1-3
It is detected.The results are shown in Table 1.
In table 1, the water-based ink of comparative example consists of the following mass percentage components: water-and acrylate lotion
57%, pigment 17%, defoaming agent 0.5%, dispersing agent 0.9%, substrate wetting agents 0.7%, levelling agent 0.8%, gas phase titanium dioxide
Silicon 0.8%, surplus are water and pH stabilizer triethanolamine, and the pH value of the water-based ink is 8.5-9.0.The same embodiment of preparation method
1；With the water-based ink of comparative example not property of water-bearing dicyclopentadiene acrylate lotion is only that in place of the difference of embodiment 1.
It is stock with plastic film (PP film, 15 μm thick, no primary coat), using printability instrument and embodiment 1-3, right
The water-based ink preparation detection sample of ratio: printing pressure 150N, reticulate pattern roller pressure are 250N, print speed printing speed 0.3m/s, net
Line roller screen frequency is 200dpi.
In resistance to dry friction detection method, the setup parameter of frictional testing machine is printed are as follows: 85rpm, 21b clump weight, friction
50 times；It is evaluated using rub resistance of the density decay rate to water-based ink, density decay rate is smaller, and crocking resistance is got over
It is good.Density decay rate=(printed patterns density after printed patterns density-friction before rubbing)/preceding printed patterns density of friction ×
100%.In moisture-proof frictional property detection method, it will test after sample dips in water and detected again, method is same as above.
Rub resistance detection method: taking length is that the detection sample of 10cm is placed between two hands, is rubbed, is observed with constant force
Printed patterns density decay situation, record printed patterns density decay rate reach 10% rubbing number.
In resistance to marring detection method, the initial load for drawing ring is that 100g is at least moved with the speed stroke of 6mm/s
80mm；If ink film is not scratched, successively continue to test with biggish load (50g increment), until ink film is scratched, every kind is examined
Test sample respectively carries out 5 tests, and the minimum load for as a result causing ink film to scratch at least 2 times indicates.
The performance test results of plastic film flexographic printing water-based ink obtained by 1 embodiment 1-3 of table
As it can be seen from table 1 plastic film obtained by embodiment 1-3 is with the pH value of flexographic printing water-based ink in 8.60-
Between 8.90, viscosity is in 45s or so under the conditions of 25 DEG C, and surface tension is between 36-38mN/m, and fineness is 10-12 μm, tinting strength, tinting power
>=98.70%, glossiness is not less than 88.60%, and first stemness is 100-102mm/90s, and storage stability is qualified.Testing result table
Bright, present invention gained water-based ink items basic performance is excellent, meets the requirement of flexographic printing water-based ink.
It is only that binder is different with water-and acrylate lotion from comparative example, the aqueous oil of flexographic printing obtained by embodiment 1-3
Ink replaces the water-and acrylate lotion of gross mass 10%-12% with aqueous dicyclopentadiene acrylate lotion, thus using
Water-and acrylate lotion and aqueous dicyclopentadiene acrylate latex composite compounding improve water-based ink in plastics as binder
The adhesive force of film surface flexographic printing.
As it can be seen from table 1 attachment fastness of the flexographic printing water-based ink obtained by embodiment 1-3 on PP film is from comparison
The 90.01% of example has been increased to 99% or so.In rub resistance test experience, the aqueous oil of flexographic printing obtained by embodiment 1-3
The density decay of ink under dry friction conditions is only 3.40%-3.71%, and the density decay under the conditions of wet friction is only 5.17%-
5.48%, well below the 7.95% of comparative example and 11.72%.In rub resistance test experience, the ink film of comparative example is only
It is rubbed by 19 times, density decay reaches 10% or more；And use ink obtained by water-based ink flexographic printing obtained by embodiment 1-3
Rubbing number of the film under similarity condition reaches 38 times or more, and anti-rubbing performance is more than doubled.It is detected in resistance to marring
In experiment, the minimum load that scratches that the ink film of comparative example can be born is 200g, and uses the soft version of water-based ink obtained by embodiment 1-3
The minimum load that scratches that printing gained ink film can be born under similarity condition is 500g, has relative to comparative example and greatly mentions
It is high.Above-mentioned service performance testing result shows the resulting flexographic printing water-based ink of the present invention in plastic film (especially polyene
Hydrocarbon film, such as PP film) printing adhesive force it is big, adhesion-tight degree is high, and gained ink film strength is high, gained printed matter without water wave,
And with excellent anti-dry/wet friction, anti-rubbing property and resistance to marring, printing quality is high, is suitble to using plastic film as printing
The package of object prints.
Claims (9)
1. a kind of plastic film preparation method of flexographic printing water-based ink, it is characterised in that: the following steps are included:
1) water-and acrylate lotion is prepared:
Take raw material monomer methyl methacrylate, butyl acrylate, acrylic acid, hydroxypropyl acrylate according to mass ratio be 25:
(13-14): (1.5-2.0): the ratio of (0.5-1.0) is uniformly mixed, and obtains monomer mixture；
A small amount of monomer mixture and emulsifier, buffer are added to the water, 76 DEG C -78 DEG C are heated to after mixing, addition is drawn on a small quantity
Send out agent, be warming up to 82 DEG C -84 DEG C and reacted, residual monomer mixture and initiator are added after 30-40min, be warming up to 88 DEG C -
90 DEG C of reaction 2-3h, after be cooled to room temperature, adjusting pH value be 7.5-8.0, be obtained by filtration solid content be 40%-42% aqueous third
Olefin(e) acid ester lotion, it is spare；
2) aqueous dicyclopentadiene acrylate lotion is prepared:
Dicyclopentadiene acrylate resin, hydroxyethyl cellulose, emulsifier and isopropanol is taken to be added to the water, shear agitation is simultaneously ground
Mill obtains the aqueous dicyclopentadiene acrylate lotion that solid content is 40%-42%, spare；
3) water-based ink is deployed:
Aqueous dicyclopentadiene acrylate lotion obtained by step 2) and pigment, dispersing agent, defoaming agent are added in the water of part, stirred
Mix it is pre-dispersed after, clipped stirring simultaneously grinds mill base is made；Again by water-and acrylate lotion obtained by gained mill base and step 1),
Substrate wetting agents, levelling agent, fumed silica are added in remaining water, filter after being dispersed with stirring, and adjust pH value with pH stabilizer
To 8.5-9.0 to get.
2. the preparation method of the plastic film flexographic printing water-based ink according to claim 1, feature exist
In: in step 1), the emulsifier is NP-10 and the mass ratio of SE-10N is 1:(0.5-0.55) mixture；The emulsification
The dosage of agent is the 4%-5% of monomer mixture gross mass.
3. the preparation method of the plastic film flexographic printing water-based ink according to claim 1, feature exist
In: in step 1), the buffer is sodium bicarbonate, and dosage is the 1.0%-1.5% of monomer mixture gross mass；The initiation
Agent is ammonium persulfate, and dosage is the 0.4%-0.5% of monomer mixture gross mass.
4. the preparation method of the plastic film flexographic printing water-based ink according to claim 1, feature exist
In: in step 2), the hydroxyethyl cellulose is in the mass percent of the aqueous dicyclopentadiene acrylate lotion of gained
3%-4%.
5. the preparation method of the plastic film flexographic printing water-based ink according to claim 1, feature exist
In: in step 2), the emulsifier is NP-10 and the mass ratio of SDS is 1:(0.65-0.70) mixture；The emulsifier
Dosage be dicyclopentadiene acrylate resin quality be 4%-5%.
6. the preparation method of the plastic film flexographic printing water-based ink according to claim 1, feature exist
In: in step 2), the isopropanol is 5%-6% in the mass percent of the aqueous dicyclopentadiene acrylate lotion of gained.
7. the preparation method of the plastic film flexographic printing water-based ink according to claim 1, feature exist
In: in step 2), the grinding, which refers to, carries out ball milling, speed 900-1000r/min, time 2- using planetary ball mill
2.5h。
8. the preparation method of the plastic film flexographic printing water-based ink according to claim 1, feature exist
In: in step 3), water-based ink is deployed according to following mass percent: water-and acrylate lotion 45%-48%, aqueous bicyclic
Pentadiene acrylic acid ester emulsion 10%-12%, pigment 15%-18%, defoaming agent 0.5%-0.8%, dispersing agent 0.8%-
1.0%, substrate wetting agents 0.5%-0.8%, levelling agent 0.5%-0.8%, fumed silica 0.5%-1.0%, surplus are
Water and pH stabilizer.
9. the preparation method of the plastic film flexographic printing water-based ink according to claim 1, feature exist
In: in step 3), the grinding, which refers to, carries out ball milling, speed 700-800r/min, time 2- using planetary ball mill
2.5h。
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111925687A (en) * | 2020-09-27 | 2020-11-13 | 湖北淡雅香生物科技股份有限公司 | Color-optimized flexo-printing environment-friendly tipping paper water-based ink and preparation method thereof |
| CN113025123A (en) * | 2019-12-09 | 2021-06-25 | 乐凯华光印刷科技有限公司 | Water-based ink with alcohol resistance and preparation method thereof |
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| US20150166702A1 (en) * | 2012-05-24 | 2015-06-18 | Basf Se | Hydrophilic, low acid content polymers as stabilizers for water-based emulsions |
| CN106497222A (en) * | 2016-10-25 | 2017-03-15 | 中国印刷科学技术研究院 | A kind of full water-based plastic flexographic ink and preparation method thereof |
| CN109251585A (en) * | 2018-07-31 | 2019-01-22 | 清远市承明新材料科技有限公司 | A kind of dry company's degree, anti-stick dirty performance and the strong water-based ink of heat resistance and preparation method thereof |
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| CN102190990A (en) * | 2010-03-08 | 2011-09-21 | 上海奇想青晨新材料科技股份有限公司 | Water-based printing ink emulsion for plastic foil, and preparation method thereof |
| US20150166702A1 (en) * | 2012-05-24 | 2015-06-18 | Basf Se | Hydrophilic, low acid content polymers as stabilizers for water-based emulsions |
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| CN113025123A (en) * | 2019-12-09 | 2021-06-25 | 乐凯华光印刷科技有限公司 | Water-based ink with alcohol resistance and preparation method thereof |
| CN111925687A (en) * | 2020-09-27 | 2020-11-13 | 湖北淡雅香生物科技股份有限公司 | Color-optimized flexo-printing environment-friendly tipping paper water-based ink and preparation method thereof |
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