High-temperature-resistant water-based ink with low friction coefficient, preparation method and application thereof

Abstract

The application discloses a kind of high-temperature-resistant low-friction coefficient water-based ink, it includes the following mass fraction components: water-based polyurethane resin 20-35%, water-based acrylic emulsion 15-30%, pigment 25-40%, auxiliary agent 1.5-3.5%, ethanol 1-25% and water 1-25%.The application selects water-based polyurethane resin, water-based acrylic emulsion as connecting material, selects water and ethanol as diluent, safe, environment-friendly, can replace traditional solvent-based ink.The water-based ink can be applied to gravure printing, has very good adhesion strength on CPP, PE, PET and other film substrates, printing pattern level stereoscopic effect is excellent, deep and shallow screen transition printing effect is excellent, color is bright, level edition color printing effect is exquisite;Can carry out 180 DEG C / 0.5 second heat sealing operation, and printing packaging bag will not appear melt ink;Friction coefficient is low, can be applied to paper towel packaging printing field.

Description

Technical Field

[0001] This invention belongs to the field of functional polymer materials technology, specifically relating to a high-temperature resistant, low-friction coefficient water-based ink, its preparation method, and its application. Background Technology

[0002] The tissue packaging industry is a rapidly developing sector, gradually becoming an important branch of the packaging industry in recent years. As people's demands for quality of life increase, the demand for daily necessities such as tissues is also constantly growing, which has driven the development of the tissue packaging industry.

[0003] Currently, most inks used for printing on tissue packaging are solvent-based inks, primarily made from polyamide resin and nitrocellulose. Solvent-based inks contain large amounts of organic solvents, which evaporate and release into the air during printing, causing air pollution and irritating or damaging the human respiratory system; long-term exposure may lead to respiratory diseases. Furthermore, nitrocellulose is an extremely dangerous chemical, made from a mixture of cotton fibers and nitric acid. Its danger lies mainly in its flammability, explosiveness, and high toxicity, especially in high-temperature environments during summer. If nitrocellulose comes into contact with a source of ignition or is subjected to friction, impact, or other external forces, it can cause an explosion, posing a significant threat to the surrounding environment and people.

[0004] As the country imposes increasingly stringent requirements on environmental protection and safety, and as consumers gradually begin to pay attention to printing quality and environmental issues, a new type of environmentally friendly water-based ink suitable for tissue packaging printing will be in great demand. Summary of the Invention

[0005] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a high-temperature resistant, low-friction coefficient water-based ink. This invention uses water-based polyurethane resin and water-based acrylic emulsion as binders, and water and ethanol as diluents. It is safe, environmentally friendly, contains no other organic solvents, does not release harmful gases, and is environmentally friendly, capable of replacing traditional solvent-based inks. This water-based ink is suitable for gravure printing, exhibits excellent adhesion strength on CPP, PE, PET and other film substrates, provides excellent three-dimensional effect and layering of printed patterns, excellent halftone transitions, vibrant colors, and exquisite multi-color printing effects; it can undergo 180℃ / 0.5-second heat sealing without ink melting on printed packaging bags; its low coefficient of friction makes it suitable for use in tissue paper packaging printing.

[0006] The present invention also proposes a method for preparing the above-mentioned high-temperature resistant, low-friction coefficient water-based ink.

[0007] This invention also proposes the application of the above-mentioned high-temperature resistant, low-friction coefficient water-based ink.

[0008] According to one aspect of the present invention, a high-temperature resistant, low-friction coefficient water-based ink is provided, comprising the following components by mass fraction:

[0009] The composition consists of 20%-35% waterborne polyurethane resin, 15%-30% waterborne acrylic emulsion, 25%-40% pigment, 1.5%-3.5% additives, 1%-25% ethanol, and 1%-25% water.

[0010] In some specific embodiments of the present invention, the water-based ink may contain about 20%, about 25%, about 30%, or about 35% water-based polyurethane resin.

[0011] In some specific embodiments of the present invention, the water-based ink may contain about 15%, about 20%, about 25%, or about 30% water-based acrylic emulsion.

[0012] In some specific embodiments of the present invention, the water-based ink may have about 25%, about 30%, about 35%, or about 40% pigment.

[0013] In some specific embodiments of the present invention, the water-based ink may contain about 5%, about 10%, about 15%, about 20%, or about 25% water.

[0014] In some specific embodiments of the present invention, the water-based ink may contain about 5%, about 10%, about 15%, about 20%, or about 25% ethanol.

[0015] In some embodiments of the present invention, the waterborne polyurethane resin is a self-crosslinking waterborne polyurethane resin. More preferably, the waterborne polyurethane resin is WPU2365 waterborne polyurethane resin from Qingyuan Huigu New Material Technology Co., Ltd., which is an aliphatic waterborne polyurethane dispersion, a semi-transparent bluish liquid with a solid content of 32±1%, a pH value of 7-9, and is miscible with alcohol. It can be used as an integral resin for grinding and bonding in surface printing and reverse printing.

[0016] In some embodiments of the present invention, the aqueous acrylic emulsion is a self-crosslinking modified aqueous acrylic emulsion. Preferably, the aqueous acrylic emulsion is SEACRYL 11K16 aqueous acrylic emulsion from Guangdong Dongdun New Material Technology Co., Ltd., which is a self-crosslinking modified aqueous acrylic emulsion, a milky white liquid with a solid content of 40±1%, a pH value of 7-8.5, good resolubility, low odor, and can be used in aqueous screen printing, flexographic printing, and gravure printing inks.

[0017] This invention preferably uses waterborne polyurethane resin and waterborne acrylic emulsion with self-crosslinking properties as the main binders, and water and ethanol as diluents, along with pigments, additives, and other materials, to prepare a high-temperature resistant, low-friction waterborne ink. This waterborne ink does not release harmful gases and is environmentally friendly; it is suitable for gravure printing, exhibits excellent adhesion strength on CPP, PE, PET, and other film substrates, and can undergo 180℃ / 0.5-second heat sealing operation without ink melting on printed packaging bags; the printed patterns have excellent layering and three-dimensional effects, excellent halftone transitions, vibrant colors, and exquisite multi-color printing effects; with a low coefficient of friction, it can be applied in the field of tissue paper packaging printing.

[0018] In some embodiments of the present invention, the pigment is titanium dioxide, preferably rutile titanium dioxide. This pigment can be selected from at least one of the following: SR-2377 titanium dioxide from Shandong Dongjia Group Co., Ltd., R-996 titanium dioxide from Sichuan Longmang Titanium Industry Co., Ltd., and R-930 titanium dioxide from Langfang Lanke Chemical Co., Ltd. Rutile titanium dioxide (titanium dioxide) is an inorganic pigment that has undergone inorganic surface treatment with zirconium and aluminum, and organic surface treatment; it possesses characteristics such as high whiteness, high gloss, high tinting strength, high weather resistance, and good dispersibility.

[0019] In this invention, the water and ethanol primarily serve as diluents to adjust the ink viscosity and drying speed. Preferably, the water used is deionized water.

[0020] In some embodiments of the present invention, the additives include dispersants, defoamers, wax powders, and leveling agents. Specifically, by mass fraction, the additives include 0.3%-0.5% dispersant, 0.1%-0.5% defoamer, 1%-2% wax powder, and 0.1%-0.5% leveling agent.

[0021] In some preferred embodiments of the present invention, the dispersant is an aqueous dispersant, which may be selected from at least one of BYK-190 aqueous dispersant (Germany), BYK-192 aqueous dispersant (Germany), TEGO-750W, and TEGO-752W aqueous dispersant. The dispersant of the present invention can significantly improve the stability of inks, prevent ink sedimentation and stratification, and can adjust the viscosity and other properties of the ink.

[0022] In some preferred embodiments of the present invention, the defoamer is an aqueous defoamer, which may be selected from at least one of BYK-012 aqueous defoamer (Germany), BYK-028 aqueous defoamer (Germany), TEGO AIREX901W aqueous defoamer, and BASF FoamStar ED 2522 aqueous defoamer. The defoamer of the present invention can inhibit foam formation, avoid the adverse effects of bubbles on ink performance, thereby improving coating performance and printing quality.

[0023] In some preferred embodiments of the present invention, the wax powder is a water-based wax powder, which may be selected from at least one of the following: Jiangxi Longhai Chemical Co., Ltd.'s 2382 water-based wax powder, Clariant 3620 water-based wax powder, Clariant 3715 water-based wax powder, and Lubrizol Lanco 1400SF water-based wax powder. The wax powder of the present invention has excellent scratch resistance, is easily dispersed in an aqueous phase, and does not separate into layers.

[0024] In some preferred embodiments of the present invention, the leveling agent is a water-based leveling agent, which may be selected from at least one of BYK-333 water-based leveling agent (Germany), TEGO425 water-based leveling agent (Germany), Hydropalat WE 3322 water-based leveling agent (BASF), and Dow Corning DC-57 water-based leveling agent (Germany). The leveling agent of the present invention has low surface tension and anti-cratering ability.

[0025] According to another aspect of the present invention, a method for preparing the above-mentioned high-temperature resistant, low-friction coefficient water-based ink is provided, comprising the following steps:

[0026] Mix some water and ethanol with waterborne polyurethane resin, stir and disperse, then add dispersant, defoamer, wax powder and pigment, stir to obtain mixed slurry;

[0027] The mixed slurry is ground to obtain a ground slurry;

[0028] Add water-based acrylic emulsion, leveling agent, remaining water and ethanol to the grinding slurry, and continue stirring to obtain the high-temperature resistant, low-friction coefficient water-based ink.

[0029] In some embodiments of the present invention, the amounts of some water and ethanol, and the remaining amounts of water and ethanol, are adjusted accordingly based on the amounts of waterborne polyurethane resin and waterborne acrylic emulsion.

[0030] In some embodiments of the present invention, a portion of water and ethanol are added to a mixing tank, followed by the addition of waterborne polyurethane resin, and the mixture is stirred and dispersed at 300-500 rpm. Then, in the dispersed state, a dispersant, defoamer, wax powder, and pigment are slowly added, and the mixture is stirred at 800-1200 rpm (e.g., about 1000 rpm) for 40-50 minutes.

[0031] In some embodiments of the present invention, the above-mentioned mixed slurry is ground 2-3 times under a constant temperature of 35-40°C; ground to a fineness of ≤15μm, preferably ground to a fineness of ≤10μm, for example ground to ≤5μm.

[0032] In some embodiments of the present invention, an aqueous acrylic emulsion, a leveling agent, the remaining water and ethanol are added to the above-mentioned grinding slurry under stirring at a speed of 300-500 rpm, and stirring is continued for 15-20 minutes after the addition of the materials.

[0033] In some specific embodiments of the present invention, the preparation method of the above-mentioned high-temperature resistant and low-friction coefficient water-based ink includes the following steps:

[0034] Add some water and ethanol to the mixing tank, then add waterborne polyurethane resin and stir at a stirring speed of 300-500 rpm until homogeneous; then slowly add dispersant, defoamer, wax powder and pigment in a dispersed state, and stir at a stirring speed of 800-1200 rpm for 40-50 minutes to obtain a mixed slurry.

[0035] The above mixed slurry is ground 2-3 times using a sand mill under a constant temperature of 35-40℃ until the fineness is ≤15μm to obtain the ground slurry;

[0036] Add water-based acrylic emulsion, leveling agent, remaining water and ethanol to the above-mentioned grinding slurry while stirring, and continue stirring at a stirring speed of 300-500 rpm for 15-20 minutes to obtain the high-temperature resistant, low-friction coefficient water-based ink.

[0037] According to another aspect of the present invention, an application of the above-mentioned high-temperature resistant, low-friction coefficient water-based ink in the field of gravure printing is proposed.

[0038] According to another aspect of the present invention, an application of the above-mentioned high-temperature resistant, low-friction coefficient water-based ink in the field of tissue paper packaging printing is proposed.

[0039] The present invention has the following beneficial effects:

[0040] 1. Traditional paper towel packaging printing inks are mostly solvent-based inks, which release large amounts of organic solvents during production and use, posing a threat to the environment. This invention uses water and ethanol as diluents, contains no other organic solvents, does not release harmful gases, and is environmentally friendly.

[0041] 2. Traditional paper towel packaging printing inks are mainly prepared by combining polyamide resin with nitrocellulose solution. The nitrocellulose used in the production process poses safety hazards such as flammability and explosiveness. This invention uses water-based resin as a binder, which does not contain organic solvents, resulting in a safe and non-flammable water-based ink.

[0042] 3. The high-temperature resistant, low-friction coefficient water-based ink of the present invention is suitable for gravure printing. It has excellent adhesion strength on film substrates such as CPP, PE, and PET. The printed pattern has excellent layering and three-dimensional effect, excellent transition between light and dark halftone printing, bright colors, and exquisite multi-color printing effect.

[0043] 4. The high-temperature resistant, low-friction coefficient water-based ink of the present invention can undergo a high-temperature heat sealing operation at 180°C for 0.5 seconds, and the printed packaging bags will not experience ink melting; the low friction coefficient makes it applicable to the field of tissue paper packaging printing. Detailed Implementation

[0044] The following will describe the concept and technical effects of the present invention clearly and completely with reference to embodiments, so as to fully understand the purpose, features and effects of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are all within the scope of protection of the present invention.

[0045] As used herein, when used in conjunction with numerical values, the term "about" means a set or range of values. For example, "about" means a range of values ​​that includes ±10%, ±5%, ±2%, ±1%, ±0.5%, ±0.2%, or ±0.1%. In one embodiment, the term "about" refers to a range of values ​​that are 5% more or less than a specific value. In another embodiment, the term "about" refers to a range of values ​​that are 2% more or less than a specific value. In yet another embodiment, the term "about" refers to a range of values ​​that are 1% more or less than a specific value.

[0046] Unless otherwise specified, the experimental methods used in the examples are conventional methods; the materials and reagents used are commercially available unless otherwise specified. Unless otherwise specified, the same parameter values ​​are used in all examples / comparative examples. The examples described below are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0047] The raw material information used in the embodiments and comparative examples of the present invention is as follows:

[0048] The waterborne polyurethane resin-1 was purchased from Qingyuan Huigu New Material Technology Co., Ltd., model number: WPU2365.

[0049] The waterborne polyurethane resin-2 was purchased from Guangdong Xidun New Material Technology Co., Ltd., model number: 50K06.

[0050] The waterborne polyurethane resin-3 was purchased from Guangzhou Ruilin New Materials Co., Ltd., model number: R8302.

[0051] The water-based acrylic emulsion-1 was purchased from Guangdong Dongdun New Material Technology Co., Ltd., model number: SEACRYL 11K16.

[0052] The water-based acrylic emulsion-2 was purchased from Zhongshan Bairui Chemical Technology Co., Ltd., model number: B-6434A.

[0053] The water-based acrylic emulsion-3 was purchased from Zhongshan Bairui Chemical Technology Co., Ltd., model number: B-8224A.

[0054] The waterborne acrylic emulsion-4 was purchased from BASF (China) Co., Ltd., model number: Joncryl 90AP.

[0055] The titanium dioxide was purchased from Shandong Dongjia Group Co., Ltd., model number: SR-2377.

[0056] The wax powder was purchased from Jiangxi Longhai Chemical Co., Ltd. as 2382 water-based wax powder.

[0057] The dispersant is BYK-190 aqueous dispersant from Germany.

[0058] The defoamer is BYK-012 water-based defoamer from Germany.

[0059] The leveling agent is BYK-333 water-based leveling agent from Germany.

[0060] Examples 1-6, Comparative Examples 1-9

[0061] The formulations of Examples 1-6 and Comparative Examples 1-9 are shown in Tables 1 and 2, respectively (all figures are weight percentages). The preparation methods of the water-based inks in Examples 1-6 and Comparative Examples 1-9 are the same, including the following steps:

[0062] (1) Add some deionized water and ethanol to the mixing tank according to the amount (as shown in the second and third rows of Table 1 and 2), then add water-based polyurethane resin, and stir at 300 rpm until uniform.

[0063] (2) In the dispersed state, slowly add water-based dispersant, water-based defoamer, water-based wax powder and titanium dioxide, adjust the stirring speed to 1000 rpm, and continue stirring for 40 minutes to obtain a mixed slurry;

[0064] (3) Grind the above mixed slurry 2-3 times with a sand mill under a constant temperature of 40℃ until the fineness is ≤15μm to obtain the ground slurry;

[0065] (4) Add the remaining deionized water, ethanol, water-based acrylic emulsion, and water-based leveling agent to the above-mentioned grinding slurry while stirring. Stir at 500 rpm for 15 minutes to prepare water-based ink.

[0066] Experimental Example

[0067] This experiment tested the performance of the water-based inks prepared in the examples and comparative examples, as shown in Tables 1 and 2. Wherein:

[0068] The film substrate is CPP film;

[0069] The test standard for adhesion strength is GB / T13217.7-2008;

[0070] The test standard for dynamic / static friction coefficients is GB / T10006-2021.

[0071] Table 1

[0072]

[0073]

[0074] As can be seen from Table 1 above, the difference between Examples 1-3 lies in the different waterborne polyurethane resins used. The waterborne polyurethane resin-1 (WPU2365) used in Example 1 has excellent adhesion strength to the film substrate. No ink melting phenomenon occurs when heat sealing at 120°C / 0.5 seconds, 160°C / 0.5 seconds, and 180°C / 0.5 seconds, and the dynamic and static friction coefficients are both low.

[0075] The waterborne polyurethane resin-2 (50K06) selected in Example 2 and the waterborne polyurethane resin-3 (R8302) selected in Example 3 exhibited poor adhesion strength on the film substrate. Specifically, ink melting occurred during heat sealing at 160°C / 0.5 seconds and 180°C / 0.5 seconds in Example 2, and ink melting also occurred during heat sealing at 120°C / 0.5 seconds, 160°C / 0.5 seconds, and 180°C / 0.5 seconds in Example 3. Furthermore, both the dynamic and static friction coefficients were relatively high.

[0076] The difference between Examples 4-6 and Example 1 lies in the different water-based acrylic emulsions used. It can be seen that the water-based acrylic emulsion-1 (SEACRYL 11K16) used in Example 1 has excellent high-temperature resistance and can withstand heat sealing operations at 120°C / 0.5 seconds, 160°C / 0.5 seconds, and 180°C / 0.5 seconds. On the other hand, the water-based acrylic emulsion-2 (B-6434A) used in Example 4, the water-based acrylic emulsion-3 (B-8224A) used in Example 5, and the water-based acrylic emulsion-4 (Joncryl 90AP) used in Example 6 have poor temperature resistance and cannot withstand heat sealing operations above 120°C / 0.5 seconds, and both their dynamic and static friction coefficients are relatively high.

[0077] In summary, as can be seen from the data in Table 1, the water-based ink prepared using waterborne polyurethane resin-1 (WPU2365) and waterborne acrylic emulsion-1 (SEACRYL 11K16) as the main binders has excellent high-temperature heat-sealing performance and low coefficient of friction.

[0078] Table 2

[0079]

[0080]

[0081] As can be seen from Table 2 above, the difference between Comparative Examples 1-2 and Example 1 is that the amount of waterborne polyurethane resin-1 (WPU2365) used is outside the scope of this invention (less than 20%). The results show that Comparative Examples 1-2 have poor adhesion strength on the film substrate. Specifically, Comparative Example 1 exhibits ink melting during heat sealing at 180°C / 0.5 seconds, while Comparative Example 2 exhibits ink melting during heat sealing at 160°C / 0.5 seconds and 180°C / 0.5 seconds.

[0082] The difference between Comparative Example 3 and Example 1 is that the amount of waterborne acrylic emulsion-1 (SEACRYL 11K16) used is outside the scope of this invention (less than 15%). The results showed that Comparative Example 3 had poor high-temperature resistance, and ink melting occurred when heat sealing was performed at 160°C / 0.5 seconds and 180°C / 0.5 seconds.

[0083] The difference between Comparative Examples 5, 7, and 9 and Example 1 is that the amount of waterborne acrylic emulsion-1 (SEACRYL 11K16) used is outside the scope of this invention (higher than 30%), which will lead to a decrease in the compatibility of waterborne polyurethane resin-1 (WPU2365) in the ink system, affecting the curing of waterborne polyurethane resin-1 (WPU2365) into a film, resulting in a decrease in the adhesion strength on the film substrate, making it impossible to perform heat sealing at 180°C / 0.5 seconds.

[0084] In summary, as can be seen from the data in Table 2, when the amount of waterborne polyurethane resin-1 (WPU2365) used is within the range of this invention (20%-35%) and the amount of waterborne acrylic emulsion-1 (SEACRYL 11K16) used is within the range of this invention (15%-30%), for example, in Examples 1 and Comparative Examples 4, 6 and 8, the waterborne inks prepared have excellent high-temperature resistance, can be heat-sealed at 180°C for 0.5 seconds, and have very good low coefficient of friction properties.

[0085] The high-temperature resistant, low-friction coefficient water-based ink prepared by this invention is suitable for gravure printing and has excellent adhesion strength on film substrates such as CPP, PE, and PET. The printed pattern has excellent layering and three-dimensional effects, excellent transition between light and dark halftone printing, and exquisite multi-color printing effect. Compared with traditional solvent-based inks prepared by combining polyamide resin with nitrocellulose liquid, it is more in line with safety and environmental protection requirements, and its excellent performance can meet the requirements of tissue paper packaging printing.

[0086] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A high-temperature resistant, low-friction coefficient water-based ink, characterized in that, Components including the following mass fractions: The composition comprises 20%-35% waterborne polyurethane resin, 15%-30% waterborne acrylic emulsion, 25%-40% pigment, 1.5%-3.5% additives, 1%-25% ethanol, and 1%-25% water; the waterborne polyurethane resin is WPU2365 waterborne polyurethane resin; the waterborne acrylic emulsion is SEACRYL 11K16 waterborne acrylic emulsion. The additives include 0.3%-0.5% dispersant, 0.1%-0.5% defoamer, 1%-2% wax powder, and 0.1%-0.5% leveling agent.

2. The high-temperature resistant, low-friction coefficient water-based ink according to claim 1, characterized in that, The pigment is titanium dioxide.

3. The high-temperature resistant, low-friction coefficient water-based ink according to claim 1, characterized in that, The pigment is rutile titanium dioxide.

4. The high-temperature resistant, low-friction coefficient water-based ink according to claim 1, characterized in that, The pigment is selected from at least one of the following: SR-2377 titanium dioxide or SR-237 titanium dioxide from Shandong Dongjia Group Co., Ltd., R-996 titanium dioxide from Sichuan Longmang Titanium Industry Co., Ltd., and R-930 titanium dioxide from Langfang Lanke Chemical Co., Ltd.

5. The high-temperature resistant, low-friction coefficient water-based ink according to claim 1, characterized in that, The dispersant is selected from at least one of BYK-190 aqueous dispersant, BYK-192 aqueous dispersant, TEGO-750W aqueous dispersant, and TEGO-752W aqueous dispersant; and / or the defoamer is selected from at least one of BYK-012 aqueous defoamer, BYK-028 aqueous defoamer, TEGOAIREX901W aqueous defoamer, and FoamStar ED 2522 aqueous defoamer.

6. The high-temperature resistant, low-friction coefficient water-based ink according to claim 1, characterized in that, The wax powder is selected from at least one of the following: Jiangxi Longhai Chemical Co., Ltd.'s 2382 water-based wax powder, Clariant 3620 water-based wax powder, Clariant 3715 water-based wax powder, and Lubrizol Lanco 1400SF water-based wax powder; and / or the leveling agent is selected from at least one of the following: BYK-333 water-based leveling agent, TEGO425 water-based leveling agent, Hydropalat WE 3322 water-based leveling agent, and DOW CORNING DC-57 water-based leveling agent.

7. The method for preparing the high-temperature resistant, low-friction coefficient water-based ink according to any one of claims 1-6, characterized in that, Includes the following steps: Mix some water and ethanol with waterborne polyurethane resin, stir and disperse, then add dispersant, defoamer, wax powder and pigment, stir to obtain mixed slurry; The mixed slurry is ground to obtain a ground slurry; Add water-based acrylic emulsion, leveling agent, remaining water and ethanol to the grinding slurry, and stir to obtain the high-temperature resistant, low-friction coefficient water-based ink.

8. The method for preparing high-temperature resistant, low-friction coefficient water-based ink according to claim 7, characterized in that, The mixed slurry was ground to a fineness of ≤15μm under a constant temperature of 40℃.

9. The application of high-temperature resistant, low-friction coefficient water-based inks as described in any one of claims 1-6 in the field of gravure printing or tissue packaging printing.

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