Efficient preparation process of environment-friendly water-based ink

Abstract

The invention belongs to the technical field of water-based ink, and particularly relates to an efficient preparation process of environment-friendly water-based ink, which comprises the following steps: selecting proper water-based resin as a main component of the water-based ink, adding a dispersing agent, a stabilizing agent, a flatting agent, a wetting agent and the like into the material, and fully dispersing pigment by using high-shear dispersing equipment to obtain the environment-friendly water-based ink. Mixing the water-based resin with part of water, fully stirring and mixing, slowly stirring by using a stirring rod to fully mix the basic slurry, grinding the mixed material, and carrying out load grinding by adopting a sanding or bead milling method; through cooperation of the structure, after the ground and mixed pigment is filtered, the filtered pigment is dried through hot air circulation, hot air can be effectively and evenly distributed in a drying area through the hot air circulation, water evaporation is accelerated, harmful volatile matter in the water-based ink is few, and the water-based ink is environmentally friendly. And waste gas emission generated in the drying process can be reduced through high efficiency of hot air circulation drying, and environmental protection is facilitated.

Description

Technical Field

[0001] The invention belongs to the technical field of water-based inks, and in particular to an efficient preparation process for environmentally friendly water-based inks. Background Art

[0002] Water-based ink is an ink with water as the main solvent, mainly used for printing, painting and other applications. This type of ink has received widespread attention and application due to its environmentally friendly characteristics. Water-based ink has become one of the mainstream choices in the modern printing and coating industry due to its environmental protection, easy handling and versatility. Although there are some challenges, such as drying time and durability issues, with the continuous development of technology, the performance of water-based ink is also constantly improving. Ink is a viscous liquid or paste used for printing and coating, which can form patterns, text or colors on the surfaces of different materials. The application of ink is very wide, covering a variety of materials from paper to cloth, plastic, metal, etc. Compared with traditional solvent-based inks, water-based inks have the advantages of low volatile organic compounds (VOCs) emissions and environmental friendliness. The efficient preparation process of this environmentally friendly water-based ink can effectively improve the performance and quality of water-based inks and reduce environmental impact by reasonably selecting raw materials, controlling production parameters and optimizing each link.

[0003] In the existing environmentally friendly water-based ink preparation process, in the traditional preparation process, the pigment dispersion liquid is placed in a well-ventilated environment, and the natural air flow is used to evaporate the water. The air-drying process may take a lot of time, especially natural air-drying, which will extend the production cycle and reduce efficiency. The air-drying effect is affected by environmental conditions such as humidity and temperature. Humid weather may lead to poor air-drying effect. In addition, during the air-drying process, the pigment may absorb surrounding dust and pollutants, reducing the purity and quality of the product, making it inconvenient to improve the air-drying efficiency, and natural air-drying cannot reduce the waste gas generated during the drying process.

[0004] To this end, the present invention provides an efficient preparation process for environmentally friendly water-based ink. Summary of the invention

[0005] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0006] The technical solution adopted by the present invention to solve the technical problem is: an efficient preparation process of an environmentally friendly water-based ink according to the present invention comprises the following steps:

[0007] S1: Select appropriate water-based resin as the main component of water-based ink, and add dispersant, stabilizer, leveling agent and wetting agent to the material;

[0008] S2: Use high shear dispersing equipment to fully disperse the pigment, then mix the water-based resin with part of the water, stir and mix thoroughly, and use a stirring rod to slowly stir to fully mix the base slurry;

[0009] S3: Grind the mixed materials by sand milling or bead milling to make the pigments fully and evenly dispersed in the resin matrix. During the grinding process, dust reduction equipment is added;

[0010] S4: After grinding, add leveling agent, defoamer and dust-proof agent to the slurry, mix them thoroughly, select a filter plate with a suitable pore size to filter the ink, remove coarse particles and bubbles, and before filtering, pressurize the surface of the filter plate to remove impurities and dirt adsorbed on the surface, and clean the filter plate with a high-pressure water gun;

[0011] S5: After the pigment is left to stand evenly and without bubbles, it is dried by hot air circulation. The hot air is used to dry the pigment at a low wind speed to accelerate the drying, but it will not cause excessive heat to cause the pigment to dry and crack. It is dried at a moderate wind speed.

[0012] The further improvement of the technical solution of the present invention is that the water-based resin in S1 can be acrylic resin or polyurethane resin, the pigment can be environmentally friendly and non-toxic pigment, and deionized water or purified water is used as the main solvent.

[0013] A further improvement of the technical solution of the present invention is that a high shear agitator, such as a high shear mixer or a homogenizer, is used in S2 to generate a strong shear force to fully disperse the solid particles.

[0014] A further improvement of the technical solution of the present invention is that: in S3, the grinding time and parameters are adjusted according to the characteristics of the pigment, and the pigment is ground to a particle size within a desired range, which is usually 200-500 nanometers.

[0015] A further improvement of the technical solution of the present invention is that when flushing the filter plate in S4, a proper distance is maintained, usually 15-30 cm, and flushing is performed from top to bottom to clean the filter plate evenly.

[0016] A further improvement of the technical solution of the present invention is that when the high-pressure water gun is used for washing in S4, if the pigment contains grease, the filter plate is washed with water at room temperature, and the temperature is controlled at 30 degrees to 60 degrees.

[0017] A further improvement of the technical solution of the present invention is that: the hot air and circulation system are combined in S5 to evenly distribute the hot air to the pigment surface, and the hot air circulation drying temperature of the pigment is usually set between 50 degrees and 80 degrees. Good air flow is maintained during the drying process to ensure uniform drying.

[0018] A further improvement of the technical solution of the present invention is that: in S3, wet grinding is used, and water or other suitable liquids are used as a medium during the grinding process to wet grind the pigment.

[0019] The beneficial effects of the present invention are as follows:

[0020] 1. The environmentally friendly and efficient preparation process of water-based ink described in the present invention is to use hot air circulation to dry the filtered pigment after filtering the ground and mixed pigment. The hot air circulation can effectively distribute the hot air evenly in the drying area, accelerate the evaporation of water, thereby shortening the drying time and improving production efficiency. The water-based ink contains less harmful volatiles, and the high efficiency of hot air circulation drying can reduce the exhaust gas emissions generated during the drying process, which is conducive to environmental protection. The fast and uniform drying process can reduce the defects of bubbles, color changes and other defects that may occur in the ink during the drying process, and improve the stability and durability of the finished product. Compared with the traditional drying method, the hot air circulation can reduce the material stress caused by temperature fluctuations, thereby reducing the wear and failure rate of the equipment;

[0021] 2. The environmentally friendly water-based ink high-efficiency preparation process of the present invention utilizes a high-shear agitator to fully disperse the pigment. The high-shear agitator can generate a strong shear force to ensure that the pigment and the resin are fully dispersed in the slurry, avoid precipitation and flocculation, and obtain a stable ink formula. Through strong stirring and dispersing effects, a relatively uniform particle distribution can be achieved, the quality of the final product is improved, and the color consistency and stability are ensured. The high-shear agitator can be applied to liquids of different viscosities and various types of pigments, so that it has good adaptability in the preparation of water-based inks;

[0022] 3. The environmentally friendly water-based ink high-efficiency preparation process of the present invention uses a high-pressure water gun to wash the filter plate before filtering the pigment. The high-pressure water gun can effectively remove residual substances, pigment particles and dirt on the filter plate to ensure the cleanliness of the filter plate. The filter plate can be ensured to have better permeability by washing, which can reduce the blockage problem in the filtering process and improve the separation effect of the pigment. The effective washing process can ensure that there are no impurities and unnecessary particles in the filtered ink, thereby improving the quality and stability of the finished ink;

[0023] 4. The efficient preparation process of an environmentally friendly water-based ink described in the present invention adds dust reduction equipment when grinding the pigment, which can effectively reduce the flying dust during the grinding process, improve the air quality in the workplace, protect the health of workers, and reduce the risk of occupational diseases. By controlling the generation of dust, it is possible to reduce ink impurities caused by dust pollution, improve the purity and consistency of the finished product, and thus improve the quality of the final product. Adding dust reduction equipment during the grinding process of the environmentally friendly water-based ink can not only improve the working environment and improve product quality, but also ensure safety and environmental protection, and promote production efficiency as a whole. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] Figure 1 This is a flowchart of the process of preparing the environmentally friendly water-based ink in an efficient preparation process;

[0026] Figure 2 The figure is a flow chart of the preparation process for the efficient preparation process of environmentally friendly water-based ink. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0028] Embodiment 1: Figure 1 to Figure 2 As shown, an efficient preparation process of an environmentally friendly water-based ink according to an embodiment of the present invention comprises the following steps:

[0029] S1: Select appropriate water-based resin as the main component of water-based ink, and add dispersant, stabilizer, leveling agent and wetting agent to the material;

[0030] S2: Use high shear dispersing equipment to fully disperse the pigment, then mix the water-based resin with part of the water, stir and mix thoroughly, and use a stirring rod to slowly stir to fully mix the base slurry;

[0031] S3: Grind the mixed materials by sand milling or bead milling to make the pigments fully and evenly dispersed in the resin matrix. During the grinding process, dust reduction equipment is added;

[0032] S4: After grinding, add leveling agent, defoamer and dust-proof agent to the slurry, mix them thoroughly, select a filter plate with a suitable pore size to filter the ink, remove coarse particles and bubbles, and before filtering, pressurize the surface of the filter plate to remove impurities and dirt adsorbed on the surface, and clean the filter plate with a high-pressure water gun;

[0033] S5: After the pigment is left to stand evenly and without bubbles, it is dried by hot air circulation. The hot air is used to dry the pigment at a low wind speed to accelerate the drying, but it will not cause excessive heat to cause the pigment to dry and crack. It is dried at a moderate wind speed.

[0034] Embodiment 2: Figure 1 to Figure 2 As shown in Comparative Example 1, another embodiment of the present invention is:

[0035] The water-based resin in S1 can be acrylic resin or polyurethane resin, the pigment can be environmentally friendly and non-toxic, deionized water or purified water is used as the main solvent, and dispersants, stabilizers, leveling agents and wetting agents are added to help improve the performance of the ink. The pigment is environmentally friendly and non-toxic to ensure good dispersibility and color saturation in the water-based system.

[0036] S2 uses a high shear agitator, such as a high shear mixer or homogenizer, to generate strong shear force, which fully disperses the solid particles, avoids sedimentation and flocculation, and obtains a stable ink formula. Through strong stirring and dispersing effects, a more uniform particle distribution can be achieved, thereby improving the quality of the final product.

[0037] In S3, the grinding time and parameters are adjusted according to the characteristics of the pigment, and the pigment is ground to a particle size within the required range, usually 200-500 nanometers. The pigment particle size is ground more finely to ensure the fluidity and printing performance of the ink.

[0038] When flushing the filter plate in S4, maintain an appropriate distance, usually 15-30 cm, and flush from top to bottom to clean it evenly.

[0039] When using a high-pressure water gun to wash in S4, the pigment contains grease. Use room temperature water to clean the filter plate, and the temperature is controlled at 30 degrees to 60 degrees. Warm water can effectively dissolve and remove ink residues, pigment particles and dirt on the filter plate, while the high-pressure water gun provides a strong impact force to ensure the cleanliness of the filter plate and improve the filtration efficiency. A clean filter plate can maintain good permeability, improve the filtration effect, ensure the removal of impurities in the slurry, and improve the uniformity and stability of the ink.

[0040] The S5 combines hot air and circulation systems to evenly distribute hot air to the pigment surface. The hot air circulation drying temperature of the pigment is usually set between 50 and 80 degrees. Good air flow is maintained during the drying process to ensure uniform drying. The filtered pigment is dried using hot air circulation. Hot air circulation can effectively distribute hot air evenly in the drying area, accelerate water evaporation, thereby shortening the drying time and improving production efficiency. There are fewer harmful volatiles in water-based inks, and the high efficiency of hot air circulation drying can reduce waste gas emissions generated during the drying process, which is helpful for environmental protection. The fast and uniform drying process can reduce defects such as bubbles and color changes that may occur in the ink during the drying process, and improve the stability and durability of the finished product.

[0041] S3 uses wet grinding, using water or other suitable liquids as the medium during the grinding process to wet grind the pigment. Wet grinding can effectively reduce the flying dust during the grinding process and improve the air quality in the workplace. By controlling the generation of dust, it can reduce ink impurities caused by dust pollution, improve the purity and consistency of the finished product, and thus improve the quality of the final product.

[0042] When preparing the pigment, the present application selects a suitable water-based resin as the main component of the water-based ink. The water-based resin can select acrylic resin or polyurethane resin, and dispersants, stabilizers, leveling agents and wetting agents are added to help improve the performance of the ink. The pigment is environmentally friendly and non-toxic to ensure good dispersibility and color saturation in the water-based system. The water-based resin is first mixed with part of the water to obtain a uniform basic slurry, and then the selected pigment is placed in the premixed liquid, and an appropriate amount of dispersant is added to improve the dispersibility of the pigment. After the materials are blended, the materials are stirred using a high shear agitator. The high shear agitator can generate a strong shear force to ensure that the pigment and the resin are fully dispersed in the slurry, avoid precipitation and flocculation, and obtain a stable ink formula. The vigorous stirring and dispersing effect can achieve a more uniform particle distribution and improve the quality of the final product. After the solid particles are fully dispersed, the water-based resin is mixed with part of the water, and the mixture is fully stirred. The stirring rod is used to slowly stir so that the basic slurry is fully mixed. Subsequently, the mixed material is ground. The material is placed in a grinder and ground. The sand milling or bead milling method is used for load grinding, which can make the pigment fully and evenly dispersed in the resin matrix. According to the characteristics of the pigment, the grinding time and parameters are adjusted to grind the pigment to a particle size between 200-500 nanometers to ensure the fluidity and printing performance of the ink. Dust reduction equipment is added during the grinding process, and wet grinding is used. Water or other suitable grinding media are used during the grinding process. Using the combined liquid as the medium to wet-grind the pigment can control the generation of dust, reduce ink impurities caused by dust pollution, improve the purity and consistency of the finished product, thereby improving the quality of the final product, ensuring safety and environmental protection, and promoting production efficiency as a whole. After grinding, add leveling agent, defoamer and dust inhibitor to the slurry, mix them thoroughly and evenly, select a filter plate with a suitable pore size to filter the ink, such as a 100-200 mesh filter, to remove coarse particles and bubbles, to ensure the stability and positioning accuracy of the final product, before filtering, pressurize the surface of the filter plate to wash it, remove impurities and dirt adsorbed on the surface, and use a high-pressure water gun to clean the filter plate. The high-pressure water gun can effectively remove residual substances, pigment particles and dirt on the filter plate, ensuring Keep the filter plate clean. Flushing can ensure that the filter plate has better permeability. When flushing with a high-pressure water gun, the pigment contains grease. Use warm water at 30 degrees to 60 degrees to clean the filter plate to improve the cleaning effect. This can reduce the blockage problem during the filtration process and improve the separation effect of the pigment. The effective cleaning process can ensure that there are no impurities and unnecessary particles in the filtered ink, thereby improving the quality and stability of the finished ink. After filtering, the pigment is allowed to stand evenly without bubbles, and then the pigment is dried by hot air circulation. Combined with the hot air and circulation system, the hot air is evenly distributed to the surface of the pigment. The hot air circulation drying temperature of the pigment is usually set between 50 and 80 degrees. Maintain good air flow during the drying process.Use hot air at a low wind speed to dry the pigment to ensure uniform drying and accelerate drying, but do not cause excessive heat to cause the pigment to dry and crack. Dry it at a gentle wind speed. After drying, package the pigment, put it in a clean container, and seal it for storage.

[0043] The above-mentioned front, back, left, right, top and bottom are all based on the figures in the specification. Figure 1 As a benchmark, according to the person's observation perspective, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0044] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present invention.

[0045] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An efficient preparation process for environmentally friendly water-based ink, characterized by: The following steps are involved: S1: Select appropriate water-based resin as the main component of water-based ink, and add dispersant, stabilizer, leveling agent and wetting agent into the material; S2: Use high shear dispersing equipment to fully disperse the pigment, then mix the water-based resin with part of the water, stir and mix thoroughly, and use a stirring rod to slowly stir to fully mix the base slurry; S3: Grind the mixed materials, use sand milling or bead milling to grind the pigments evenly and fully in the resin matrix. During the grinding process, add dust reduction equipment. S4: After grinding, add leveling agent, defoamer and dust-proof agent to the slurry, mix them thoroughly, select a filter plate with a suitable pore size to filter the ink, remove coarse particles and bubbles, and before filtering, pressurize the surface of the filter plate to remove impurities and dirt adsorbed on the surface, and clean the filter plate with a high-pressure water gun; S5: After the pigment is left to stand evenly and without bubbles, it is dried by hot air circulation. The hot air is used to dry the pigment at a low wind speed to accelerate the drying, but it will not cause excessive heat to cause the pigment to dry and crack. It is dried at a moderate wind speed.

2. The efficient preparation process of an environmentally friendly water-based ink according to claim 1, characterized in that: The water-based resin in S1 can be acrylic resin or polyurethane resin, the pigment can be environmentally friendly and non-toxic pigment, and deionized water or purified water is used as the main solvent.

3. The efficient preparation process of an environmentally friendly water-based ink according to claim 1, characterized in that: A high shear mixer is used in S2 to fully disperse the solid particles.

4. The efficient preparation process of an environmentally friendly water-based ink according to claim 1, characterized in that: In S3, the grinding time and parameters are adjusted according to the characteristics of the pigment, and the pigment is ground until the particle size reaches a desired range, which is usually 200-500 nanometers.

5. The efficient preparation process of an environmentally friendly water-based ink according to claim 1, characterized in that: When flushing the filter plate in S4, maintain an appropriate distance, usually 15-30 cm, and flush from top to bottom to clean it evenly.

6. The efficient preparation process of an environmentally friendly water-based ink according to claim 1, characterized in that: When the high-pressure water gun is used for washing in S4, the pigment contains grease, and the filter plate is washed with water at room temperature, and the temperature is controlled at 30 degrees to 60 degrees.

7. The efficient preparation process of an environmentally friendly water-based ink according to claim 1, characterized in that: The S5 combines hot air and circulation systems to evenly distribute hot air to the pigment surface. The hot air circulation drying temperature of the pigment is usually set between 50 degrees and 80 degrees. Good air flow is maintained during the drying process to ensure uniform drying.

8. The efficient preparation process of an environmentally friendly water-based ink according to claim 1, characterized in that: In S3, wet grinding is used, and water or other suitable liquids are used as a medium during the grinding process to wet grind the pigment.

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