Water-based ink for cigarette package printing and preparation method of water-based ink

Abstract

The invention relates to the field of ink, in particular to water-based ink for cigarette package printing and a preparation method of the water-based ink, and the water-based ink is prepared from the following components in parts by weight: 30-60 parts of water-based acrylic emulsion, 16-32 parts of water-based styrene-acrylic emulsion, 21-36 parts of enhanced pigment filler, 0.2-1.2 parts of dispersing agent, 0.1-1 part of defoaming agent, 0.6-1.8 parts of flatting agent, 2.3-4.6 parts of coalescing agent and 20-40 parts of deionized water. According to the present invention, the traditional pigment is replaced with the enhanced pigment filler, such that the good dispersion and the good adhesion are provided, and the glossiness, the dyeing property and the light resistance are significantly improved.

Description

Technical Field

[0001] The 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] At present, the cigarette packaging printing industry mostly uses alcohol-soluble gravure printing inks. This type of ink uses a large amount of alcohol and ester solvents. Although it can meet the requirements of cigarette label printing, it contains a large amount of organic solvents. In the actual operation process, the volatilization of organic solvents is inhaled by operators, which will cause physical discomfort and harm. At the same time, the emission of volatile solvents will pollute the surrounding environment. With the continuous improvement of people's living standards, environmental protection and greenness have become the general trend of today's printing and packaging industry. Compared with organic solvent-based inks, water-based inks with water as the solvent have the advantage of having extremely low VOC content, which can reduce the harm to ink users, and thus are becoming more and more widely used.

[0003] Water-based ink has good printing properties. The ink is stable, does not corrode the plate, is easy to operate, is cheap, has good adhesion after printing, is highly water-resistant, and dries quickly. However, the water-based polymer emulsion used in water-based ink in the prior art is not as good as the traditional organic solvent-based ink in terms of gloss and tinting power, which can easily lead to the pattern being dull after the ink is printed on the cigarette paper. In addition, the light resistance is also insufficient, resulting in more serious fading under sunlight. Therefore, it is more important to develop a water-based ink for cigarette paper with high gloss, high coloring, and light resistance. Summary of the invention

[0004] In view of the problems existing in the prior art, the object of the present invention is 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 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 dispersants, 0.1-1 parts of defoamers, 0.6-1.8 parts of leveling agents, 2.3-4.6 parts of film-forming aids and 20-40 parts of deionized water.

[0008] Preferably, the water-based acrylic emulsion has a brand name of Hypomer AC-2518, 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 aqueous styrene acrylic emulsion is BLJ-8600H, the viscosity is 1500-2500cps, the solid content is 46%-48%, and the pH is 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 using glycidyl-modified allophane particles and 4-vinylaniline, and then combining them 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 dodecyl 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, adding (3-glycidyloxypropyl)trimethoxysilane to an ethanol solution, mixing evenly, then adding allophane particles, stirring under reflux, filtering, washing, centrifuging and drying to obtain glycidyl-modified allophane particles;

[0019] S2, 4-vinylaniline and toluene are mixed in a reaction container, and after being fully stirred, glycidyl-modified allophane particles are added, and after being evenly dispersed at room temperature, the reaction container is placed in a water bath, the temperature is raised to 60-80° C., and the mixture is stirred for 8-12 hours at the temperature. After the reaction is completed, the mixture is rotary evaporated, washed, centrifuged and dried to obtain active allophane particles;

[0020] S3. At room temperature, weigh mercapto silicone oil and add it to carbon tetrachloride, stir thoroughly until uniform, then add active allophane particles, disperse evenly again, then add photosensitizer, place the reaction system under ultraviolet light, stir to react, after the reaction is completed, remove the solvent, dry, and 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 1 g: (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 is 3%-8%.

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

[0026] Preferably, in S3, the intensity of ultraviolet light 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) Add defoaming agent, leveling agent and film-forming aid into the second mixed liquid, stir evenly again, and obtain 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 adopts a mixture of acrylic emulsion and styrene acrylic emulsion as the main raw material, and has not only good film-forming properties, but also 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 has significantly improved gloss, colorability and light resistance.

[0034] 2. The enhanced pigments and fillers used in the present invention are prepared by ball milling organic fillers 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 finds that the colorability of the ink using the enhanced pigments and fillers is also greatly improved.

[0035] 3. The modified allophane particles are prepared by 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 is used to react with amino-glycidyl groups to obtain active allophane particles containing vinyl groups; finally, mercapto silicone oil is used to combine with it to produce a click chemical reaction to obtain modified allophane particles 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 existence 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 limit the scope of the present invention. The change or adjustment of the relative relationship thereof shall also be regarded as the scope of the present invention without substantially changing the technical content.

[0037] In order to better understand the above technical scheme, the 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 in order to enable a more thorough understanding of the present invention and to enable the scope of the present invention to be fully communicated to those skilled in the art.

[0038] Some 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 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 in conjunction with 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 aid is dodecanol ester.

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

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

[0049] S2, 4-vinylaniline and toluene are mixed in a reaction container, and after being fully stirred, glycidyl-modified allophane particles are added, and the mass volume ratio of glycidyl-modified allophane particles, 4-vinylaniline and toluene is 1g:0.36g:35mL. After being evenly dispersed at room temperature, the reaction container is placed in a water bath, heated to 70°C, and stirred for 10 hours. After the reaction is completed, the solvent is removed by rotary evaporation, and then the particles are washed three times by centrifugation with anhydrous ethanol. After washing, the precipitate is collected by centrifugation and vacuum dried to obtain active allophane particles;

[0050] S3. At room temperature, weigh mercapto silicone oil (molecular weight of mercapto silicone oil is 2500, mercapto content is 6 mol%) and add it to carbon tetrachloride. Stir well until uniform. Then add active allophane particles. The mass volume ratio of active allophane particles, mercapto silicone oil and carbon tetrachloride is 1 g:0.65 g:50 mL. Disperse evenly again. Then add benzoin dimethyl ether. The amount added is 4.5% of the mass of mercapto silicone oil. Stir and react under the action of ultraviolet light. The ultraviolet light intensity is 2.1 mW / cm 2 The stirring reaction time is 2 hours, and the stirring speed is 150r / min. 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 are mixed into a planetary ball mill. The mass ratio of the modified allophane particles and phthalocyanine red is 15:21. The ball milling treatment is started. The ball-to-material ratio is 18:1. The ball milling speed is 300 r / min. The ball milling time is 3 hours. After the ball milling is completed, the enhanced pigment filler is 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 defoamer, 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 aid is propylene glycol ethyl ether.

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

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

[0062] S2, 4-vinylaniline and toluene are mixed in a reaction container, and after being fully stirred, glycidyl-modified allophane particles are added, and the mass volume ratio of glycidyl-modified allophane particles, 4-vinylaniline and toluene is 1g:0.24g:20mL. After being evenly dispersed at room temperature, the reaction container is placed in a water bath, the temperature is raised to 60°C, and the mixture is stirred for 8 hours. After the reaction is completed, the solvent is removed by rotary evaporation, and then the particles are washed three times by centrifugation with anhydrous ethanol. After washing, the precipitate is collected by centrifugation and vacuum dried to obtain active allophane particles;

[0063] S3. At room temperature, weigh mercapto silicone oil (the molecular weight of mercapto silicone oil is 2000, and the mercapto content is 3 mol%) and add it to carbon tetrachloride. Stir it until it is uniform. Then add active allophane particles. The mass volume ratio of active allophane particles, mercapto silicone oil and carbon tetrachloride is 1 g:0.53 g:40 mL. Disperse it evenly again. Then add photosensitizer benzoin dimethyl ether. The amount added is 2.5% of the mass of mercapto silicone oil. Stir and react under the action of ultraviolet light. The ultraviolet light intensity is 1.4 mW / cm 2The stirring reaction time is 1.5 hours, and the stirring speed is 100 r / min. 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;

[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 treatment is started. The ball-to-material ratio is 12:1. The ball milling speed is 250r / min. The ball milling time is 2h. After the ball milling is completed, the enhanced 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] Wherein, the preparation method of the enhanced pigment and filler comprises:

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

[0072] S2, 4-vinylaniline and toluene are mixed in a reaction container, and after being fully stirred, glycidyl-modified allophane particles are added, and the mass volume ratio of glycidyl-modified allophane particles, 4-vinylaniline and toluene is 1g:0.48g:50mL. After being evenly dispersed at room temperature, the reaction container is placed in a water bath, the temperature is raised to 80°C, and the mixture is stirred for 12 hours. After the reaction is completed, the solvent is removed by rotary evaporation, and then the particles are washed three times by centrifugation with anhydrous ethanol. After washing, the precipitate is collected by centrifugation and vacuum dried to obtain active allophane particles;

[0073] S3. At room temperature, weigh mercapto silicone oil (molecular weight of mercapto silicone oil is 3000, mercapto content is 8 mol%) and add it to carbon tetrachloride, stir it thoroughly until it is uniform, then add active allophane particles, the mass volume ratio of active allophane particles, mercapto silicone oil and carbon tetrachloride is 1g:0.78g:60mL, disperse it evenly again, then add photosensitizer benzoin diethyl ether, the addition amount is 7.5% of the mass of mercapto silicone oil, stir and react under the action of ultraviolet light, the ultraviolet light intensity is 2.8mW / cm 2 The stirring reaction time is 2.5 hours, and the stirring speed is 200r / min. 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;

[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 treatment is started. The ball-to-material ratio is 20:1. The ball milling speed is 550 r / min. The ball milling time is 4 hours. After the ball milling is completed, the enhanced pigment filler is obtained.

[0075] The preparation method of the above-mentioned 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 enhanced pigment filler is replaced by the traditional organic pigment phthalocyanine red, and 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 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 traditional organic pigment phthalocyanine red, allophane particles and mercapto silicone oil, the mass ratio of allophane particles, mercapto silicone oil and organic pigment phthalocyanine red is 9:6:21, and 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 into the printing equipment, coated on the surface of the substrate with a coating thickness of 30 μm, and then placed in a hot air drying treatment at a temperature of 65° C. for 10 minutes; the performance of the dried water-based ink was tested accordingly.

[0084] The reference standard for adhesion fastness (coated paper) is GB / T 13217.7-2009 "Test method for adhesion fastness of liquid ink"; the reference standard for gloss (coated paper) is GB / T 13217.2-2009 "Test method for gloss of liquid ink"; the reference standard for tinting strength (coated paper) is GB / T13217.6-2008 "Test method for tinting strength of liquid ink"; 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] From the test results in Table 1, it can be seen that the water-based ink prepared in Example 1 has the best overall performance, not only having higher adhesion, but also having higher gloss, tinting strength and light fastness level. This shows that the water-based ink prepared in Example 1 has the advantages of high gloss, high coloring and light fastness.

[0090] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means 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 representation of the above terms should not be understood as necessarily being directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may 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 is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A water-based ink for cigarette packaging printing, characterized in that: Calculated 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 dispersants, 0.1-1 parts of defoamers, 0.6-1.8 parts of leveling agents, 2.3-4.6 parts of film-forming aids and 20-40 parts of deionized water; Among them, the enhanced pigment filler 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; the modified allophane particles are first prepared by preparing active allophane particles from glycidyl-modified allophane particles and 4-vinylaniline, and then combined with mercapto silicone oil.

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

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. The water-based ink for cigarette packaging printing according to claim 1, characterized in that: The preparation method of the modified allophane particles comprises: S1, adding (3-glycidyloxypropyl)trimethoxysilane to an ethanol solution, mixing evenly, then adding allophane particles, stirring under reflux, filtering, washing, centrifuging and drying to obtain glycidyl-modified allophane particles; S2, 4-vinylaniline and toluene are mixed in a reaction container, and after being fully stirred, glycidyl-modified allophane particles are added, and after being evenly dispersed at room temperature, the reaction container is placed in a water bath, the temperature is raised to 60-80° C., and the mixture is stirred for 8-12 hours at the temperature. After the reaction is completed, the mixture is rotary evaporated, washed, centrifuged and dried to obtain active allophane particles; S3. At room temperature, weigh mercapto silicone oil and add it to carbon tetrachloride, stir thoroughly until uniform, then add active allophane particles, disperse evenly again, then add photosensitizer, place the reaction system under ultraviolet light, stir to react, after the reaction is completed, remove the solvent, dry, and obtain modified allophane particles.

7. The water-based ink for cigarette packaging printing according to claim 6, characterized in that: 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.

8. The water-based ink for cigarette packaging printing according to claim 6, characterized in that: 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.

9. The water-based ink for cigarette packaging printing according to claim 6, characterized in that: In S3, the molecular weight of the mercapto silicone oil is 2000-3000, and the molar content of mercapto is 3%-8%; the mass volume ratio of the active allophane particles, mercapto silicone oil and carbon tetrachloride is 1g:(0.53-0.78)g:(40-60)mL.

10. 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 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; (2) adding the weighed reinforcing pigment and dispersant to the first mixed solution and stirring evenly to obtain a second mixed solution; (3) Adding a defoamer, 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.

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