Water-based ink for cigarette packaging printing and preparation method thereof

Abstract

The present invention relates to the field of inks, and more specifically to a water-based ink for cigarette packaging printing and a preparation method thereof. The water-based ink comprises, by weight, 30-60 parts of an aqueous acrylic emulsion, 16-32 parts of an aqueous styrene-acrylic emulsion, 21-36 parts of a reinforcing pigment and filler, 0.2-1.2 parts of a dispersant, 0.1-1 parts of a defoamer, 0.6-1.8 parts of a leveling agent, 2.3-4.6 parts of a film-forming aid, and 20-40 parts of deionized water. The present invention replaces traditional pigments with reinforcing pigments and fillers, resulting in improved dispersibility and adhesion, as well as significantly enhanced gloss, colorability, and lightfastness.

Description

Technical Field

[0001] The present invention relates to the field of inks, and in particular to a water-based ink for cigarette packaging printing and a preparation method thereof. Background Art

[0002] Currently, the cigarette packaging and printing industry primarily uses alcohol-based gravure inks. These inks utilize significant amounts of alcohol and ester solvents. While these inks meet the requirements for cigarette label printing, they contain significant amounts of organic solvents. During actual operation, inhalation of these volatilized organic solvents can cause discomfort and harm to operators, while also polluting the surrounding environment. With the continuous improvement of people's living standards, environmental protection and green practices have become a major trend in the printing and packaging industry. Compared to organic solvent-based inks, water-based inks are increasingly popular due to their extremely low VOC content, thus minimizing the risk to users.

[0003] Water-based inks offer excellent printing properties, including stable ink properties, non-corrosive properties, simple operation, low price, excellent post-printing adhesion, strong water resistance, and rapid drying. However, compared to traditional organic solvent-based inks, the aqueous polymer emulsions used in existing water-based inks lack gloss and tinting strength, resulting in dull, matte patterns on cigarette wrappers. Furthermore, their lightfastness is also insufficient, leading to significant fading in sunlight. Therefore, developing a water-based ink for cigarette wrappers that offers high gloss, high tinting, and lightfastness is crucial. Summary of the Invention

[0004] In view of the problems existing in the prior art, the present invention aims to provide a water-based ink for cigarette packaging printing and a preparation method thereof.

[0005] The purpose of the present invention is achieved by adopting the following technical solutions:

[0006] In a first aspect, the present invention provides a water-based ink for cigarette packaging printing, which comprises, calculated by weight:

[0007] 30-60 parts of water-based acrylic emulsion, 16-32 parts of water-based styrene acrylic emulsion, 21-36 parts of reinforcing pigments and fillers, 0.2-1.2 parts of dispersant, 0.1-1 parts of defoaming agent, 0.6-1.8 parts of leveling agent, 2.3-4.6 parts of film-forming aid and 20-40 parts of deionized water.

[0008] Preferably, the water-based acrylic emulsion is of the brand Hypomer AC-2518, has a viscosity of 1000-1500 cps, a solid content of 46%-48%, and a pH of 8.5-9.0.

[0009] Preferably, the brand of the water-based styrene acrylic emulsion is Baolijia BLJ-8600H, with a viscosity of 1500-2500 cps, a solid content of 46%-48%, and a pH of 7.0-8.0.

[0010] Preferably, the reinforced pigment is obtained by ball milling modified allophane particles and organic pigments, and the mass ratio of the modified allophane particles to the organic pigments is 10-20:5-30.

[0011] Preferably, the modified allophane particles are prepared by first preparing active allophane particles by reacting glycidyl-modified allophane particles with 4-vinylaniline, and then combining the particles with mercapto silicone oil.

[0012] Preferably, the organic pigment is at least one of phthalocyanine red, phthalocyanine blue, phthalocyanine green, permanent yellow and permanent violet.

[0013] Preferably, the dispersant is at least one of TEGO-760W, TEGO-752W, and TEGO-745W.

[0014] Preferably, the defoaming agent is at least one of BYK-028, BYK-021, BYK-022, and BYK-024.

[0015] Preferably, the leveling agent is at least one of BYK-301, BYK-333, BYK-345, and BYK-346.

[0016] Preferably, the film-forming aid is at least one of lauryl alcohol ester, propylene glycol ethyl ether, ethylene glycol butyl ether, and propylene glycol butyl ether.

[0017] Preferably, the preparation method of the modified allophane particles comprises:

[0018] S1. Add (3-glycidyloxypropyl)trimethoxysilane to an ethanol solution, mix well, then add allophane particles, stir under reflux, filter, wash, centrifuge, and dry to obtain glycidyl-modified allophane particles;

[0019] S2. 4-vinylaniline and toluene are mixed in a reaction vessel, stirred thoroughly, and glycidyl-modified allophane particles are added. After uniform dispersion at room temperature, the reaction vessel is placed in a water bath, heated to 60-80° C., and stirred for 8-12 hours. After the reaction is completed, the mixture is rotary evaporated, washed, centrifuged, and dried to obtain active allophane particles.

[0020] S3. At room temperature, mercapto silicone oil is weighed and added to carbon tetrachloride, and the mixture is thoroughly stirred until uniform. Then, active allophane particles are added and dispersed uniformly again. Then, a photosensitizer is added and the reaction system is placed under ultraviolet light and stirred for reaction. After the reaction is completed, the solvent is removed and the mixture is dried to obtain modified allophane particles.

[0021] Preferably, in S1, the particle size of the allophane particles is 100±10 nm, the SiO2 content is greater than 28%, the Al2O3 content is greater than 56%, and the density is 1.86-1.88 g / cm 3 , purchased from Shandong Qiying Nanotechnology Co., Ltd.

[0022] Preferably, in S1, the mass fraction of the ethanol solution is 20%-80%; the mass volume ratio of the allophane particles, 3-glycidyloxypropyl)trimethoxysilane and the ethanol solution is 1g:(0.35-0.55)g:(10-20)mL.

[0023] Preferably, in S2, the mass volume ratio of the glycidyl-modified allophane particles, 4-vinylaniline and toluene is 1 g: (0.24-0.48) g: (20-50) mL.

[0024] Preferably, in S3, the molecular weight of the mercapto silicone oil is 2000-3000, and the molar content of mercapto groups is 3%-8%.

[0025] Preferably, in S3, the mass-to-volume ratio of the active allophane particles, mercaptosilicone oil and carbon tetrachloride is 1 g: (0.53-0.78) g: (40-60) mL.

[0026] Preferably, in S3, the UV light intensity is 1.4-2.8 mW / cm 2 The stirring reaction time is 1.5-2.5h, and the stirring speed is 100-200r / min.

[0027] Preferably, in S3, the photosensitizer is benzoin dimethyl ether or benzoin diethyl ether, and the added amount is 2.5%-7.5% of the mass of the mercapto silicone oil.

[0028] In a second aspect, the present invention provides a method for preparing water-based ink for cigarette packaging printing, comprising the following steps:

[0029] (1) weighing an aqueous acrylic emulsion, an aqueous styrene acrylic emulsion, and deionized water according to amounts, mixing them, and stirring them uniformly to obtain a first mixed solution;

[0030] (2) adding the weighed reinforcing pigment and dispersant to the first mixed solution and stirring evenly to obtain a second mixed solution;

[0031] (3) Adding a defoaming agent, a leveling agent, and a film-forming aid into the second mixed liquid, stirring the mixture evenly again, and obtaining a water-based ink for cigarette packaging printing.

[0032] The beneficial effects of the present invention are:

[0033] 1. The present invention prepares a water-based ink suitable for cigarette packaging printing, which uses a mixture of acrylic emulsion and styrene acrylic emulsion as the main raw material. It not only has good film-forming properties, but also has certain advantages such as water resistance and weather resistance. In addition, the enhanced color filler replaces the traditional pigment, which not only has better dispersibility and adhesion, but also significantly improves the gloss, colorability and light resistance.

[0034] 2. The enhanced pigments and fillers used in the present invention are prepared by ball milling an organic filler and modified allophane particles. After the pigments treated in this way are compounded with the modified allophane particles, the light resistance and weather resistance are greatly enhanced, thereby improving the gloss and light resistance of the overall ink. In addition, the present invention also found that the colorability of the ink using the enhanced pigments and fillers is also greatly improved.

[0035] 3. Modified allophane particles are prepared using allophane particles with small particle size and large specific surface area as the base material. During the preparation process, the allophane is first modified with glycidyl groups using silane. Then, 4-vinylaniline reacts with the amino-glycidyl groups to produce active allophane particles containing vinyl groups. Finally, mercapto silicone oil is combined with the modified allophane particles to produce a click chemistry reaction with thioether groups and silicone oil on the surface. DETAILED DESCRIPTION

[0036] The technical solution of the present invention is described below through specific examples. It should be understood that the one or more method steps mentioned in the present invention do not exclude the presence of other method steps before and after the combination step or the insertion of other method steps between these explicitly mentioned steps; it should also be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. Moreover, unless otherwise specified, the numbering of each method step is only a convenient tool for identifying each method step, and is not intended to limit the order of arrangement of each method step or to define the scope of the present invention. Changes or adjustments in their relative relationships, without substantially changing the technical content, should also be regarded as the scope of the present invention.

[0037] In order to better understand the above technical solutions, exemplary embodiments of the present invention are described in more detail below. Although exemplary embodiments of the present invention are shown, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0038] Some of the raw material parameters used in the embodiments of the present invention are as follows:

[0039] The brand of the water-based acrylic emulsion is Hypomer AC-2518, with a viscosity of 1000-1500 cps, a solid content of 46%-48%, and a pH of 8.5-9.0.

[0040] The brand of the water-based styrene acrylic emulsion is Baolijia BLJ-8600H, with a viscosity of 1500-2500cps, a solid content of 46%-48%, and a pH of 7.0-8.0.

[0041] The particle size of allophane particles is 100±10nm, the SiO2 content is greater than 28%, the Al2O3 content is greater than 56%, and the density is 1.86-1.88g / cm 3 , purchased from Shandong Qiying Nanotechnology Co., Ltd.

[0042] The present invention will be further described below with reference to the following examples.

[0043] Example 1

[0044] A water-based ink for cigarette packaging printing, calculated by weight, comprising:

[0045] 45 parts of water-based acrylic emulsion, 24 parts of water-based styrene acrylic emulsion, 28 parts of reinforcing pigments and fillers, 0.7 parts of dispersant, 0.5 parts of defoaming agent, 1.2 parts of leveling agent, 3.1 parts of film-forming aid and 30 parts of deionized water.

[0046] Among them, the dispersant is TEGO-760W; the defoaming agent is BYK-028; the leveling agent is BYK-301; and the film-forming agent is dodecyl alcohol ester.

[0047] The preparation method of the enhanced pigment and filler comprises:

[0048] S1. Add (3-glycidyloxypropyl)trimethoxysilane to a 55 wt % ethanol solution and mix well. Then add allophane particles. The mass volume ratio of allophane particles, 3-glycidyloxypropyl)trimethoxysilane and ethanol solution is 1 g:0.45 g:15 mL. Stir under reflux. After the treatment, filter out solid particles, wash three times with anhydrous ethanol, collect the solid particles by centrifugation, and dry under vacuum to obtain glycidyl-modified allophane particles.

[0049] S2. 4-vinylaniline and toluene were mixed in a reaction vessel and stirred thoroughly. Then, glycidyl-modified allophane particles were added. The mass volume ratio of the glycidyl-modified allophane particles, 4-vinylaniline and toluene was 1 g:0.36 g:35 mL. After uniform dispersion at room temperature, the reaction vessel was placed in a water bath, heated to 70° C., and stirred for 10 h. After the reaction was completed, the solvent was removed by rotary evaporation. The particles were then washed three times by centrifugation with anhydrous ethanol. After washing, the precipitate was collected by centrifugation and vacuum dried to obtain active allophane particles.

[0050] S3. At room temperature, mercapto silicone oil (molecular weight of mercapto silicone oil is 2500, mercapto content is 6 mol%) is weighed and added to carbon tetrachloride, and the mixture is thoroughly stirred until uniform. Activated allophane particles are then added, and the mass volume ratio of activated allophane particles, mercapto silicone oil, and carbon tetrachloride is 1 g:0.65 g:50 mL. The mixture is dispersed uniformly again, and then benzoin dimethyl ether is added in an amount of 4.5% of the mass of the mercapto silicone oil. The mixture is stirred and reacted under the action of ultraviolet light, and the ultraviolet light intensity is 2.1 mW / cm 2 The stirring reaction time is 2 hours, the stirring speed is 150r / min, and after the reaction is completed, the solvent is removed and the mixture is placed in a vacuum box for drying to obtain modified allophane particles;

[0051] S4. At room temperature, the modified allophane particles and phthalocyanine red were mixed into a planetary ball mill. The mass ratio of the modified allophane particles to phthalocyanine red was 15:21. The ball milling process was started with a ball-to-material ratio of 18:1, a ball milling speed of 300 r / min, and a ball milling time of 3 h. After the ball milling was completed, a reinforced pigment filler was obtained.

[0052] The method for preparing the water-based ink for cigarette packaging printing comprises the following steps:

[0053] (1) weighing an aqueous acrylic emulsion, an aqueous styrene acrylic emulsion, and deionized water according to amounts, mixing them, and stirring them uniformly to obtain a first mixed solution;

[0054] (2) adding the weighed reinforcing pigment and dispersant to the first mixed solution and stirring evenly to obtain a second mixed solution;

[0055] (3) Adding a defoaming agent, a leveling agent, and a film-forming aid into the second mixed liquid, stirring the mixture evenly again, and obtaining a water-based ink for cigarette packaging printing.

[0056] Example 2

[0057] A water-based ink for cigarette packaging printing, calculated by weight, comprising:

[0058] 30 parts of water-based acrylic emulsion, 32 parts of water-based styrene acrylic emulsion, 21 parts of reinforcing pigments and fillers, 0.5 parts of dispersant, 0.9 parts of defoaming agent, 0.9 parts of leveling agent, 3.5 parts of film-forming aid and 20 parts of deionized water.

[0059] Among them, the dispersant is TEGO-752W; the defoaming agent is BYK-021; the leveling agent is BYK-333; and the film-forming agent is propylene glycol ethyl ether.

[0060] The preparation method of the enhanced pigment and filler comprises:

[0061] S1. Add (3-glycidyloxypropyl)trimethoxysilane to a 20 wt % ethanol solution and mix well. Then add allophane particles. The mass volume ratio of allophane particles, 3-glycidyloxypropyl)trimethoxysilane, and ethanol solution is 1 g:0.35 g:10 mL. Stir under reflux, filter, wash, centrifuge, and dry to obtain glycidyl-modified allophane particles.

[0062] S2. 4-vinylaniline and toluene were mixed in a reaction vessel and stirred thoroughly. Then, glycidyl-modified allophane particles were added. The mass volume ratio of the glycidyl-modified allophane particles, 4-vinylaniline and toluene was 1 g:0.24 g:20 mL. After uniform dispersion at room temperature, the reaction vessel was placed in a water bath, heated to 60° C., and stirred for 8 h. After the reaction was completed, the solvent was removed by rotary evaporation. The particles were then washed three times by centrifugation with anhydrous ethanol. After washing, the precipitate was collected by centrifugation and vacuum dried to obtain active allophane particles.

[0063] S3. At room temperature, mercapto silicone oil (molecular weight of mercapto silicone oil is 2000, mercapto content is 3 mol%) is weighed and added to carbon tetrachloride, and the mixture is stirred thoroughly until uniform. Then, active allophane particles are added, and the mass volume ratio of active allophane particles, mercapto silicone oil and carbon tetrachloride is 1 g:0.53 g:40 mL. The mixture is dispersed uniformly again, and then photosensitizer benzoin dimethyl ether is added in an amount of 2.5% of the mass of the mercapto silicone oil. The mixture is stirred and reacted under the action of ultraviolet light, and the ultraviolet light intensity is 1.4 mW / cm 2The stirring reaction time was 1.5 h, the stirring speed was 100 r / min, and after the reaction was completed, the solvent was removed and the mixture was placed in a vacuum box for drying to obtain modified allophane particles;

[0064] S4. At room temperature, the modified allophane particles and the organic pigment phthalocyanine blue are mixed into a ball mill. The mass ratio of the modified allophane particles and the organic pigment phthalocyanine blue is 10:5. The ball milling process is started. The ball-to-material ratio is 12:1. The ball milling speed is 250 r / min and the ball milling time is 2 h. After the ball milling is completed, the reinforced pigment filler is obtained.

[0065] The preparation method of the above-mentioned water-based ink for cigarette packaging printing is the same as that in Example 1.

[0066] Example 3

[0067] A water-based ink for cigarette packaging printing, calculated by weight, comprising:

[0068] 60 parts of water-based acrylic emulsion, 16 parts of water-based styrene acrylic emulsion, 36 parts of reinforcing pigments and fillers, 0.9 parts of dispersant, 0.3 parts of defoaming agent, 1.5 parts of leveling agent, 3.5 parts of film-forming aid and 40 parts of deionized water.

[0069] Among them, the dispersant is TEGO-745W; the defoaming agent is BYK-022; the leveling agent is BYK-345; and the film-forming aid is propylene glycol butyl ether.

[0070] The preparation method of the enhanced pigment and filler comprises:

[0071] S1. Add (3-glycidyloxypropyl)trimethoxysilane to an 80 wt % ethanol solution and mix well. Then add allophane particles. The mass volume ratio of allophane particles, 3-glycidyloxypropyl)trimethoxysilane, and ethanol solution is 1 g:0.55 g:20 mL. Stir under reflux, filter, wash, centrifuge, and dry to obtain glycidyl-modified allophane particles.

[0072] S2. 4-vinylaniline and toluene were mixed in a reaction vessel and stirred thoroughly. Then, glycidyl-modified allophane particles were added. The mass volume ratio of the glycidyl-modified allophane particles, 4-vinylaniline and toluene was 1 g:0.48 g:50 mL. After uniform dispersion at room temperature, the reaction vessel was placed in a water bath, heated to 80° C., and stirred for 12 h. After the reaction was completed, the solvent was removed by rotary evaporation. The particles were then washed three times by centrifugation with anhydrous ethanol. After washing, the precipitate was collected by centrifugation and vacuum dried to obtain active allophane particles.

[0073] S3. At room temperature, mercapto silicone oil (molecular weight of mercapto silicone oil is 3000, mercapto content is 8 mol%) is weighed and added to carbon tetrachloride, and the mixture is thoroughly stirred until uniform. Then, active allophane particles are added, and the mass volume ratio of active allophane particles, mercapto silicone oil and carbon tetrachloride is 1 g:0.78 g:60 mL. The mixture is dispersed uniformly again, and then photosensitizer benzoin diethyl ether is added in an amount of 7.5% of the mass of the mercapto silicone oil. The mixture is stirred and reacted under the action of ultraviolet light, and the ultraviolet light intensity is 2.8 mW / cm 2 The stirring reaction time was 2.5 h, the stirring speed was 200 r / min, and after the reaction was completed, the solvent was removed and the mixture was placed in a vacuum oven for drying to obtain modified allophane particles;

[0074] S4. At room temperature, the modified allophane particles and the organic pigment phthalocyanine green are mixed into a ball mill. The mass ratio of the modified allophane particles and the organic pigment phthalocyanine green is 20:30. The ball milling process is started. The ball-to-material ratio is 20:1. The ball milling speed is 550 r / min and the ball milling time is 4 h. After the ball milling is completed, the reinforced pigment filler is obtained.

[0075] The preparation method of the water-based ink for cigarette packaging printing is the same as that in Example 1.

[0076] Comparative Example 1

[0077] A water-based ink, which differs from Example 1 in that the reinforcing pigment is replaced by the traditional organic pigment phthalocyanine red, and the other components and preparation process remain unchanged.

[0078] Comparative Example 2

[0079] A water-based ink, which differs from Example 1 in that the reinforcing pigment is replaced by a mixture of a traditional organic pigment phthalocyanine red and allophane particles, the mass ratio of the allophane particles to the organic pigment phthalocyanine red is 15:21, and the other components and preparation process remain unchanged.

[0080] Comparative Example 3

[0081] A water-based ink, which differs from Example 1 in that the reinforcing pigment is replaced by a mixture of a traditional organic pigment phthalocyanine red, hydrophobic stone particles, and mercaptosilicone oil, and the mass ratio of the hydrophobic stone particles, mercaptosilicone oil, and the organic pigment phthalocyanine red is 9:6:21. The other components and preparation process remain unchanged.

[0082] Experimental testing

[0083] The water-based ink prepared in Example 1 and Comparative Examples 1-3 was added to a printing device and coated on the surface of a substrate with a coating thickness of 30 μm. The substrate was then placed in a hot air drying process at 65° C. for 10 minutes. The properties of the dried water-based ink were tested accordingly.

[0084] The reference standard for adhesion fastness (coated paper) is GB / T 13217.7-2009 "Test method for adhesion fastness of liquid inks"; the reference standard for glossiness (coated paper) is GB / T 13217.2-2009 "Test method for gloss of liquid inks"; the reference standard for tinting strength (coated paper) is GB / T13217.6-2008 "Test method for tinting strength of liquid inks"; the reference standard for light fastness grade is ISO12040-1997, which is divided into grades 1-8, with grade 1 being the worst and grade 8 being the best.

[0085] The test results are shown in Table 1 below:

[0086] Table 1 Performance of different water-based inks

[0087]

[0088]

[0089] The test results in Table 1 show that the water-based ink prepared in Example 1 has the best overall performance, not only having higher adhesion, but also higher gloss, tinting strength, and light fastness. This indicates that the water-based ink prepared in Example 1 has the advantages of high gloss, high tinting strength, and light fastness.

[0090] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

[0091] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A water-based ink for cigarette packaging printing, characterized in that: Calculated in parts by weight, including: 30-60 parts of water-based acrylic emulsion, 16-32 parts of water-based styrene acrylic emulsion, 21-36 parts of reinforcing pigments and fillers, 0.2-1.2 parts of dispersant, 0.1-1 parts of defoamer, 0.6-1.8 parts of leveling agent, 2.3-4.6 parts of film-forming aid and 20-40 parts of deionized water; The enhanced pigment filler is obtained by ball-milling modified allophane particles and organic pigments, wherein the mass ratio of the modified allophane particles to the organic pigments is 10-20:5-30; the modified allophane particles are prepared by firstly preparing active allophane particles by mixing glycidyl-modified allophane particles with 4-vinylaniline, and then combining the particles with mercapto silicone oil; The preparation method of the modified allophane particles comprises: S1. Add (3-glycidyloxypropyl)trimethoxysilane to an ethanol solution, mix well, then add allophane particles, stir under reflux, filter, wash, centrifuge, and dry to obtain glycidyl-modified allophane particles; S2. 4-vinylaniline and toluene are mixed in a reaction vessel, stirred thoroughly, and glycidyl-modified allophane particles are added. After uniform dispersion at room temperature, the reaction vessel is placed in a water bath, heated to 60-80° C., and stirred for 8-12 hours. After the reaction is completed, the mixture is rotary evaporated, washed, centrifuged, and dried to obtain active allophane particles. S3. Weighing mercapto silicone oil and adding it to carbon tetrachloride at room temperature, stirring thoroughly until uniform, then adding active allophane particles and dispersing them uniformly again, then adding a photosensitizer, placing the reaction system under ultraviolet light, stirring and reacting, after the reaction is completed, removing the solvent and drying to obtain modified allophane particles; In the S1, the mass fraction of the ethanol solution is 20%-80%; the mass volume ratio of the allophane particles, 3-glycidyloxypropyl)trimethoxysilane and the ethanol solution is 1g: (0.35-0.55)g: (10-20)mL; In S2, the mass volume ratio of glycidyl-modified allophane particles, 4-vinylaniline, and toluene is 1 g: (0.24-0.48) g: (20-50) mL; In S3, the molecular weight of the mercapto silicone oil is 2000-3000, the molar content of the mercapto group is 3%-8%; the mass volume ratio of the active allophane particles, the mercapto silicone oil and the carbon tetrachloride is 1g: (0.53-0.78)g: (40-60)mL.

2. The water-based ink for cigarette packaging printing according to claim 1, characterized in that: The water-based acrylic emulsion is Hypomer AC-2518, with a viscosity of 1000-1500 cps, a solid content of 46%-48%, and a pH of 8.5-9.0; the water-based styrene acrylic emulsion is Baolijia BLJ-8600H, with a viscosity of 1500-2500 cps, a solid content of 46%-48%, and a pH of 7.0-8.

0.

3. The water-based ink for cigarette packaging printing according to claim 1, characterized in that: The organic pigment is at least one of phthalocyanine red, phthalocyanine blue, phthalocyanine green, permanent yellow and permanent violet.

4. The water-based ink for cigarette packaging printing according to claim 1, characterized in that: The dispersant is at least one of TEGO-760W, TEGO-752W, and TEGO-745W; the defoamer is at least one of BYK-028, BYK-021, BYK-022, and BYK-024.

5. The water-based ink for cigarette packaging printing according to claim 1, characterized in that: The leveling agent is at least one of BYK-301, BYK-333, BYK-345, and BYK-346; the film-forming aid is at least one of dodecyl alcohol ester, propylene glycol ethyl ether, ethylene glycol butyl ether, and propylene glycol butyl ether.

6. A method for preparing water-based ink for cigarette packaging printing according to claim 1, characterized in that: The following steps are involved: (1) Weighing the aqueous acrylic emulsion, the aqueous styrene acrylic emulsion, and deionized water according to the amount, mixing them, and stirring them evenly to obtain a first mixed solution; (2) adding the weighed reinforcing pigment and dispersant to the first mixed solution and stirring evenly to obtain a second mixed solution; (3) Add defoaming agent, leveling agent and film-forming aid to the second mixed liquid and stir evenly again to obtain water-based ink for cigarette packaging printing.

Images