Environment-friendly cold-set black ink

Abstract

The invention relates to the technical field of ink, in particular to environment-friendly cold-set black ink. The environment-friendly cold-set black ink is prepared from the following raw materials in parts by weight: 160-240 parts of water, 40-60 parts of carbon black, 30-40 parts of phenolic resin, 20-30 parts of petroleum resin, 30-40 parts of mineral oil, 20-30 parts of vegetable oil, 8-12 parts of a first additive, 6-10 parts of a second additive and 1-3 parts of a defoaming agent. According to the invention, the carbon black can be tightly combined with the carbon powder by utilizing the pore structure of the surface gaps of the carbon powder and the excellent deformation performance of the rubber powder, at the moment, a premix with excellent specific surface area performance is formed, and when the ink is prepared and then is coated, the contact area between the ink and a printing stock can be effectively increased; and the particles can carry more viscous substances to be in contact with the printing stock, so that the printing ink is not easy to fall off, and the adhesion performance of the printing ink is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of inks, and particularly to an environment-friendly cold-set black ink. Background Art

[0002] Ink is an important material for printing. It shows patterns and words on the printing substrate through printing or spraying, and is used for various printing such as books, packaging and decoration, architectural decoration, and electronic circuit boards. With the increasing social demand, the variety and output of inks have also expanded and increased accordingly.

[0003] In the prior art, in cold-set inks, granular coloring substances are usually used for coating and coloring. After a large number of particulate matters come into contact with the printing substrate, the contact area between the adhesive substance and the printing substrate will be reduced, affecting the adhesion performance of the ink. Based on this, the present invention provides an environment-friendly cold-set black ink. Summary of the Invention

[0004] The purpose of the present invention is to provide an environment-friendly cold-set black ink. The environment-friendly cold-set black ink prepared by the present invention not only has good adhesion performance, but also has excellent coloring power performance, effectively improving the use performance of the environment-friendly cold-set black ink.

[0005] To achieve the above purpose, the present invention provides the following technical solutions: An environment-friendly cold-set black ink, comprising the following raw materials in parts by weight: 160 - 240 parts of water, 40 - 60 parts of carbon black, 30 - 40 parts of phenolic resin, 20 - 30 parts of petroleum resin, 30 - 40 parts of mineral oil, 20 - 30 parts of vegetable oil, 8 - 12 parts of a first additive, 6 - 10 parts of a second additive, and 1 - 3 parts of an antifoaming agent; The raw materials of the first additive are composed of bamboo chopsticks and rubber powder. The mass ratio of the bamboo chopsticks, starch, and rubber powder is 1:(0.6 - 0.8). The bamboo chopsticks are pretreated before preparation to obtain carbon powder, and the first additive is prepared by mixing the carbon powder and the rubber powder; The raw materials of the second additive are prepared by mixing eggshell powder, sodium lignosulfonate, lecithin, and alkyd resin solution. The mass ratio of the eggshell powder, sodium lignosulfonate, lecithin, and alkyd resin solution is 1:(0.2 - 0.4):(0.1 - 0.3):(2 - 3); The first additive and carbon black are mixed to obtain a premix.

[0006] Further, the vegetable oil is a mixture of linseed oil and tung oil, and the mass ratio of the linseed oil to the tung oil is 4:6.

[0007] Further, the mineral oil is at least one of white wax oil and naphthenic oil.

[0008] Further, the defoamer is selected from at least one of methyl silicone oil and polysiloxane.

[0009] Further, the pretreatment method of the bamboo chopsticks is as follows: The bamboo chopsticks are selected as the waste bamboo chopsticks recycled from the waste station. After obtaining the bamboo chopsticks, the bamboo chopsticks are cut into small sections with a length of 6 - 10 mm. The small sections of bamboo chopsticks are soaked in clean water for 4 - 6 h. After the soaking is completed, the bamboo chopsticks are washed. After the washing is completed, the bamboo chopsticks are drained of water and then sent into a muffle furnace. The muffle furnace is set to heat up to 580 - 620 °C at a heating rate of 10 - 20 °C / min, and keep warm for 6 - 10 min. When the temperature rises to 400 °C, nitrogen is introduced, and the nitrogen introduction time is 2 min to obtain carbonized bamboo chopsticks.

[0010] Further, the carbonized bamboo chopsticks are ground, and the grinding particle size is 20 - 30 μm. After the pretreatment of the bamboo chopsticks is completed, carbon powder is obtained.

[0011] Further, the rubber powder is selected as the powder made from waste tires, and the particle size of the rubber powder is 20 - 30 μm.

[0012] Further, the premix is prepared by the following method: The first additive and carbon black are added into a mixer. The mixer is set to mix at 300 - 400 r / min for 8 - 12 min. The obtained mixture is sent into an oven. The oven is set to dry at 60 - 70 °C for 10 - 20 min. Then it is poured into a pressing mold, and pressed at a set pressure of 30 - 40 MPa to obtain a pressed material. The pressed material is crushed and ground, and the grinding particle size is 4 - 10 μm to obtain the premix.

[0013] Further, the eggshell powder is prepared by the following method: The raw material of the eggshell powder is selected as the waste eggshells recycled from the dessert shop. The eggshells are washed and then sent into an oven. The oven is set to dry at 60 - 70 °C for 30 - 40 min. After the drying treatment is completed, it is ground, and the grinding particle size is 4 - 10 μm to obtain the eggshell powder.

[0014] Further, the environment-friendly cold-set black ink is prepared by the following method: S1: The premix and water are mixed to obtain a first mixed solution; S2: Phenolic resin, petroleum resin, mineral oil, the second additive and the defoamer are mixed to obtain a second mixed solution; S3: The first mixed solution obtained in S1 and the second mixed solution obtained in S2 are mixed to obtain a third mixed solution. The third mixed solution is allowed to stand until oil-water separation occurs. The upper layer of water in the third mixed solution is poured out and sent into a vacuum drying device. The set temperature is 80 - 100 °C, and the pressure is 0.06 - 0.1 MPa to obtain a dehydrated material. S4: The dehydrated material is ground to a particle size of 1 - 3 μm. The product obtained from grinding and vegetable oil are fed into a reaction kettle. The set temperature of the reaction kettle is 40 - 60 °C, the stirring speed is 80 - 120 r / min, and it is kept warm and stirred for 10 - 20 min to produce an environment-friendly cold-set black ink.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In the present invention, during the preparation process of the environment-friendly cold-set black ink, by adding the first additive, the carbon powder therein uses recycled bamboo chopsticks as raw materials, that is, carbon powder with bamboo as the base material is generated. This carbon powder has good surface pore properties. After mixing and pressing with rubber powder and carbon black with a particle size smaller than that of the carbon powder, using the pore structure of the surface gaps of the carbon powder and the excellent deformation performance of the rubber powder, the carbon black can be tightly combined with the carbon powder. At this time, a premix with excellent specific surface area performance is formed. When coating after the ink is prepared, it can effectively increase the contact area between the ink and the printing substrate. The particulate matter can carry more viscous substances to contact the printing substrate, making the ink not easy to fall off, and effectively improving the adhesion performance of the ink.

[0016] 2. In the present invention, by adding eggshell powder, sodium lignosulfonate, lecithin and amino resin solution in the second additive, it can play a role in uniformly dispersing the ink. Sodium lignosulfonate can adsorb on the surface of the particulate matter, generating electrostatic repulsion between the particulate matters, avoiding the agglomeration phenomenon of the particulate materials, and making the coloring substances uniformly dispersed in the ink system, effectively improving the coloring performance of the ink. Specific Embodiments

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0018] Among them, it should be noted that the raw materials used in the following embodiments are all commercially available raw materials.

[0019] Example 1:

[0020] An environment-friendly cold-set black ink, comprising the following raw materials in parts by weight: 160 parts of water, 40 parts of carbon black, 30 parts of phenolic resin, 20 parts of petroleum resin, 30 parts of mineral oil, 20 parts of vegetable oil, 8 parts of the first additive, 6 parts of the second additive and 1 part of defoamer; The raw materials of the first additive consist of bamboo chopsticks and rubber powder. The mass ratio of bamboo chopsticks, starch, and rubber powder is 1:(0.6). The bamboo chopsticks are pretreated before preparation to obtain carbon powder, and the first additive is prepared by mixing the carbon powder and rubber powder; The raw materials of the second additive are prepared by mixing eggshell powder, sodium lignosulfonate, lecithin, and alkyd resin solution. The mass ratio of eggshell powder, sodium lignosulfonate, lecithin, and alkyd resin solution is 1:(0.2):(0.1):(2); The first additive is mixed with carbon black to obtain a premix.

[0021] The vegetable oil selected is a mixture of linseed oil and tung oil, and the mass ratio of linseed oil and tung oil is 4:6.

[0022] The mineral oil selected is white wax oil.

[0023] The defoaming agent selected is methyl silicone oil.

[0024] The pretreatment method of bamboo chopsticks is as follows: The bamboo chopsticks selected are waste bamboo chopsticks recycled from waste collection stations. After obtaining the bamboo chopsticks, the bamboo chopsticks are cut into small sections with a length of 6 mm. The small sections of bamboo chopsticks are soaked in clean water for 4 h. After the soaking is completed, the cleaning treatment of the bamboo chopsticks is completed. After the cleaned bamboo chopsticks are drained of water, they are sent into a muffle furnace. The muffle furnace is set to heat up to 580 °C at a heating rate of 10 °C / min, and keep warm for 6 min. When the temperature rises to 400 °C, nitrogen is introduced, and the nitrogen introduction time is 2 min to obtain carbonized bamboo chopsticks.

[0025] The carbonized bamboo chopsticks are ground, and the grinding particle size is 20 μm. The pretreatment of the bamboo chopsticks is completed to obtain carbon powder.

[0026] The rubber powder selected is powder made from waste tires, and the particle size of the rubber powder is 20 μm.

[0027] The premix is prepared by the following method: The first additive and carbon black are added into a mixer, and the mixer is set to mix at 300 r / min for 8 min. The obtained mixture is sent into an oven, and the oven is set to dry at 60 °C for 10 min. Then it is poured into a pressing mold, and pressed at a set pressure of 30 MPa to obtain a pressed material. The pressed material is crushed and ground, and the grinding particle size is 4 μm to obtain the premix.

[0028] The eggshell powder is prepared by the following method: The raw materials of the eggshell powder are waste eggshells recycled from dessert shops. The eggshells are cleaned and then sent into an oven. The oven is set to dry at 60 °C for 30 min. After the drying treatment is completed, grinding treatment is carried out, and the grinding particle size is 4 μm to obtain the eggshell powder.

[0029] The environment-friendly cold-set black ink is prepared by the following method: S1: The premix is mixed with water to obtain a first mixed solution; S2: Prepare a second mixed solution by mixing phenolic resin, petroleum resin, mineral oil, a second additive, and an antifoaming agent. S3: Mix the first mixed solution obtained in S1 with the second mixed solution obtained in S2 to prepare a third mixed solution. Let the third mixed solution stand until oil-water separation occurs, pour out the upper layer of water in the third mixed solution, and send it to a vacuum drying device. Set the temperature to 80 °C and the pressure to 0.06 MPa to obtain a dehydrated material. S4: Grind the dehydrated material with a grinding particle size of 1 μm. Feed the ground product and vegetable oil into a reaction kettle. Set the temperature of the reaction kettle to 40 °C, the stirring speed to 80 r / min, and perform heat preservation and stirring for 10 min to prepare an environmentally friendly cold-set black ink.

[0030] Example 2:

[0031] An environmentally friendly cold-set black ink, comprising the following raw materials in parts by weight: 200 parts of water, 50 parts of carbon black, 35 parts of phenolic resin, 25 parts of petroleum resin, 35 parts of mineral oil, 25 parts of vegetable oil, 10 parts of a first additive, 8 parts of a second additive, and 2 parts of an antifoaming agent; The raw materials of the first additive are composed of bamboo chopsticks and rubber powder. The mass ratio of bamboo chopsticks, starch, and rubber powder is 1:(0.7). The bamboo chopsticks are pretreated before preparation to obtain carbon powder, and the first additive is prepared by mixing the carbon powder and rubber powder. The raw materials of the second additive are prepared by mixing eggshell powder, sodium lignosulfonate, lecithin, and alkyd resin solution. The mass ratio of eggshell powder, sodium lignosulfonate, lecithin, and alkyd resin solution is 1:(0.3):(0.2):(2.5); Mix the first additive and carbon black to obtain a premixed material.

[0032] The vegetable oil is a mixture of linseed oil and tung oil, and the mass ratio of linseed oil to tung oil is 4:6.

[0033] The mineral oil is naphthenic oil.

[0034] The antifoaming agent is polysiloxane.

[0035] The pretreatment method of the bamboo chopsticks is as follows: The bamboo chopsticks are waste bamboo chopsticks recycled from a waste station. After obtaining the bamboo chopsticks, the bamboo chopsticks are cut into small sections with a length of 8 mm. The small sections of bamboo chopsticks are soaked in clean water for 5 h. After soaking, the bamboo chopsticks are cleaned. After cleaning, the bamboo chopsticks are drained of water and then sent to a muffle furnace. The muffle furnace is set to heat up to 600 °C at a heating rate of 15 °C / min and keep the temperature for 8 min. When the temperature rises to 400 °C, nitrogen is introduced, and the nitrogen introduction time is 2 min to obtain carbonized bamboo chopsticks.

[0036] The carbonized bamboo chopsticks are ground into powder with a grinding particle size of 25 μm to complete the pretreatment of the bamboo chopsticks and obtain carbon powder.

[0037] The rubber powder is the powder made from waste tires, and the particle size of the rubber powder is 25 μm.

[0038] The premix is prepared by the following method: The first additive and carbon black are added into a mixer, and the mixer is set to mix at 350 r / min for 10 min. The obtained mixture is sent into an oven, and the oven is set to dry at 65 °C for 15 min. Then it is poured into a pressing mold, and pressed at a set pressure of 35 MPa to obtain a pressed material. The pressed material is crushed and ground, and the grinding particle size is 7 μm, thus obtaining the premix.

[0039] The eggshell powder is prepared by the following method: The raw material of the eggshell powder is the waste eggshells recycled from a dessert shop. The eggshells are washed and then sent into an oven, and the oven is set to dry at 65 °C for 35 min. After the drying treatment is completed, it is ground, and the grinding particle size is 7 μm, thus obtaining the eggshell powder.

[0040] The environment-friendly cold-set black ink is prepared by the following method: S1: The premix and water are mixed to obtain a first mixed solution; S2: Phenolic resin, petroleum resin, mineral oil, the second additive and defoamer are mixed to obtain a second mixed solution; S3: The first mixed solution obtained in S1 and the second mixed solution obtained in S2 are mixed to obtain a third mixed solution. The third mixed solution is allowed to stand until oil-water separation occurs, and the upper layer of water in the third mixed solution is poured out and sent into a vacuum drying device. The temperature is set to 90 °C and the pressure is set to 0.08 MPa to obtain a dehydrated material; S4: The dehydrated material is ground, and the grinding particle size is 2 μm. The ground product and vegetable oil are sent into a reaction kettle. The reaction kettle is set to a temperature of 50 °C, the stirring speed is 100 r / min, and heat preservation and stirring treatment are carried out for 15 min to obtain the environment-friendly cold-set black ink.

[0041] Example 3:

[0042] An environment-friendly cold-set black ink, comprising the following raw materials in parts by weight: 240 parts of water, 60 parts of carbon black, 40 parts of phenolic resin, 30 parts of petroleum resin, 40 parts of mineral oil, 30 parts of vegetable oil, 12 parts of the first additive, 10 parts of the second additive and 3 parts of defoamer; The raw material of the first additive consists of bamboo chopsticks and rubber powder. The mass ratio of bamboo chopsticks, starch and rubber powder is 1:(0.8). The bamboo chopsticks are pretreated before preparation to obtain carbon powder, and the first additive is prepared by mixing the carbon powder and rubber powder; The raw material of the second additive is prepared by mixing eggshell powder, sodium lignosulfonate, lecithin and alkyd resin solution. The mass ratio of eggshell powder, sodium lignosulfonate, lecithin and alkyd resin solution is 1:(0.4):(0.3):(3); The first additive is mixed with carbon black to obtain a premix.

[0043] The vegetable oil is a mixture of linseed oil and tung oil, and the mass ratio of linseed oil to tung oil is 4:6.

[0044] The mineral oil is selected as white wax oil.

[0045] The defoamer is selected as methyl silicone oil.

[0046] The pretreatment method of bamboo chopsticks is as follows: The bamboo chopsticks are selected as the waste bamboo chopsticks recycled from the waste station. After obtaining the bamboo chopsticks, the bamboo chopsticks are cut into small sections with a length of 10 mm. The small sections of bamboo chopsticks are soaked in clear water for 6 h. After the soaking is completed, the cleaning treatment of the bamboo chopsticks is completed. After the cleaned bamboo chopsticks are drained of water, they are sent into a muffle furnace. The muffle furnace is set to heat up to 620 °C at a heating rate of 20 °C / min, and keep warm for 10 min. When the temperature rises to 400 °C, nitrogen is introduced, and the nitrogen introduction time is 2 min, to obtain carbonized bamboo chopsticks.

[0047] The carbonized bamboo chopsticks are subjected to powder grinding treatment with a grinding particle size of 30 μm, and the pretreatment of the bamboo chopsticks is completed to obtain carbon powder.

[0048] The rubber powder is selected as the powder made from waste tires, and the particle size of the rubber powder is 30 μm.

[0049] The premix is obtained by the following method: The first additive and carbon black are added into a mixer, and the mixer is set to mix at 400 r / min for 12 min. The obtained mixture is sent into an oven, and the oven is set to dry at 70 °C for 20 min. Then it is poured into a pressing mold, and pressed at a set pressure of 40 MPa to obtain a pressed material. The pressed material is subjected to crushing and grinding treatment with a grinding particle size of 10 μm to obtain the premix.

[0050] The eggshell powder is obtained by the following method: The raw material of the eggshell powder is selected as the waste eggshells recycled from the dessert shop. The eggshells are subjected to cleaning treatment, and after cleaning, they are sent into an oven. The oven is set to dry at 70 °C for 40 min. After the drying treatment is completed, grinding treatment is carried out with a grinding particle size of 10 μm to obtain the eggshell powder.

[0051] The environment-friendly cold-set black ink is obtained by the following method: S1: The premix is mixed with water to obtain a first mixed solution; S2: Phenolic resin, petroleum resin, mineral oil, the second additive and defoamer are mixed to obtain a second mixed solution; S3: The first mixed solution obtained in S1 is mixed with the second mixed solution obtained in S2 to obtain a third mixed solution. The third mixed solution is allowed to stand until oil-water separation occurs, and the upper layer of water in the third mixed solution is poured out and sent into a vacuum drying device. The set temperature is 100 °C and the pressure is 0.1 MPa to obtain a dehydrated material; S4: The dehydrated material is ground to a particle size of 3 μm. The product obtained from grinding and vegetable oil are fed into a reaction kettle. The set temperature of the reaction kettle is 60 °C, the stirring speed is 120 r / min, and it is kept warm and stirred for 20 min to prepare an environment-friendly cold-set black ink.

[0052] Comparative Example 1: The difference between this comparative example and Example 1 is that this comparative example does not contain the first additive.

[0053] Comparative Example 2: The difference between this comparative example and Example 1 is that this comparative example does not contain the second additive.

[0054] Comparative Example 3: The difference between this comparative example and Example 1 is that this comparative example does not contain rubber powder.

[0055] Comparative Example 4: The difference between this comparative example and Example 1 is that no premixing treatment is carried out in this comparative example.

[0056] Performance test: Performance tests are carried out on the environment-friendly cold-set black inks prepared in Example 1, Example 2, Example 3, Comparative Example 1, Comparative Example 2, Comparative Example 3 and Comparative Example 4.

[0057] In the performance test, the test method for adhesion is as follows: After the environment-friendly cold-set black inks prepared in Example 1, Example 2, Example 3, Comparative Example 1, Comparative Example 2, Comparative Example 3 and Comparative Example 4 are coated on the test board, a lattice pattern is cut on the ink coating layer with a tool so that it just penetrates to the substrate, and the resistance of the ink coating layer to separation from the substrate is evaluated. It is evaluated according to the area of the ink coating layer falling off from the substrate in the scribed area. Among them, the evaluation is from Grade 0 to Grade 5, with Grade 0 being the best and Grade 5 being the worst. The test method for tinting strength is as follows: After the environment-friendly cold-set black inks prepared in Example 1, Example 2, Example 3, Comparative Example 1, Comparative Example 2, Comparative Example 3 and Comparative Example 4 are coated on the test board, the surface color is inspected at an incident angle of (45 ± 5)° and under a standard light source, and the inspected color grade is evaluated. The evaluation grade results are divided into A, B, and C. Among them, A is the best and C is the worst. The obtained test data are recorded in Table 1: Table 1 Record table of adhesion and tinting strength test results

[0058] Among them, the adhesion score grades of the environment-friendly cold-set black inks prepared in Example 1, Example 2, Example 3, Comparative Example 1, Comparative Example 2, Comparative Example 3 and Comparative Example 4 are Grade 0, Grade 0, Grade 0, Grade 1, Grade 2, Grade 2 and Grade 1 respectively; The coloring power rating levels of the environmentally friendly cold-set black inks prepared in Example 1, Example 2, Example 3, Comparative Example 1, Comparative Example 2, Comparative Example 3, and Comparative Example 4 are A level, A level, A level, B level, A level, C level, and C level, respectively.

[0059] It can be seen that the adhesion performance and coloring power performance of the environmentally friendly cold-set black inks prepared in Comparative Examples 1, 2, 3, and 4 are lower than those in Examples 1, 2, and 3. This shows that: by adding the first additive during the preparation of the environmentally friendly cold-set black ink, the carbon powder therein uses recycled bamboo chopsticks as raw materials, that is, carbon powder with bamboo as the substrate is generated. This carbon powder has good surface pore properties. After mixing and pressing with rubber powder and carbon black with a particle size smaller than that of the carbon powder, using the pore structure of the surface gaps of the carbon powder and the excellent deformation performance of the rubber powder, the carbon black can be tightly combined with the carbon powder. At this time, a premix with excellent specific surface area performance is formed. When the ink is coated after being prepared, it can effectively increase the contact area between the ink and the printing substrate, and the ink can better adhere to the surface of the printing substrate, making the ink not easy to fall off and effectively improving the adhesion performance of the ink.

[0060] By comparing and analyzing the relevant data in the table, it can be seen that the environmentally friendly cold-set black ink prepared by the present invention not only has good adhesion performance but also has excellent coloring power performance. This shows that the environmentally friendly cold-set black ink provided by the present invention has a broader market prospect and is more suitable for promotion.

[0061] In the description of this specification, the description with reference to terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0062] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not elaborate on all the details, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. The present specification selects and specifically describes these embodiments to better explain the principle and practical application of the present invention, so that those skilled in the art in the relevant technical field can understand and utilize the present invention well. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. An environmentally friendly cold-setting black ink, characterized by: The invention comprises the following raw materials in parts by weight: 160 to 240 parts of water, 40 to 60 parts of carbon black, 30 to 40 parts of phenolic resin, 20 to 30 parts of petroleum resin, 30 to 40 parts of mineral oil, 20 to 30 parts of vegetable oil, 8 to 12 parts of a first additive, 6 to 10 parts of a second additive and 1 to 3 parts of a defoaming agent; The raw materials of the first additive are composed of bamboo chopsticks and rubber powder, the mass ratio of the bamboo chopsticks, starch and rubber powder is 1: (0.6-0.8), the bamboo chopsticks are pretreated before preparation to obtain carbon powder, and the first additive is obtained by mixing the carbon powder and rubber powder; The raw materials of the second additive are prepared by mixing eggshell powder, sodium lignin sulfonate, lecithin and alkyd resin solution, wherein the mass ratio of the eggshell powder, sodium lignin sulfonate, lecithin and alkyd resin solution is 1: (0.2-0.4): (0.1-0.3): (2-3); The first additive is mixed with carbon black to prepare a premix.

2. The environmentally friendly cold-setting black ink according to claim 1, characterized in that: The vegetable oil is a mixture of linseed oil and tung oil, and the mass ratio of the linseed oil to the tung oil is 4:

6.

3. The environmentally friendly cold-setting black ink according to claim 1, characterized in that: The mineral oil is selected from at least one of white wax oil and naphthenic oil.

4. The environmentally friendly cold-setting black ink according to claim 1, characterized in that: The defoaming agent is selected from at least one of methyl silicone oil and polysiloxane.

5. The environmentally friendly cold-setting black ink according to claim 1, characterized in that: The pretreatment method of the bamboo chopsticks is as follows: the bamboo chopsticks are selected from discarded bamboo chopsticks recovered from a waste station. After obtaining the bamboo chopsticks, the bamboo chopsticks are cut into small segments with a length of 6 to 10 mm. The small segments of the bamboo chopsticks are soaked in clean water for 4 to 6 hours. After the soaking is completed, the bamboo chopsticks are cleaned. After the cleaned bamboo chopsticks are drained, they are sent to a muffle furnace. The muffle furnace is set to heat up to 580 to 620°C at a heating rate of 10 to 20°C / min, and the temperature is kept for 6 to 10 minutes. Nitrogen is introduced when the temperature reaches 400°C for 2 minutes to obtain carbonized bamboo chopsticks.

6. The environmentally friendly cold-setting black ink according to claim 5, characterized in that: The carbonized bamboo chopsticks are ground into powder with a particle size of 20 to 30 μm, and the pretreatment of the bamboo chopsticks is completed to obtain carbon powder.

7. The environmentally friendly cold-setting black ink according to claim 1, characterized in that: The rubber powder is powder made from waste tires, and the particle size of the rubber powder is 20 to 30 μm.

8. The environmentally friendly cold-setting black ink according to claim 1, characterized in that: The premix is ​​prepared by the following method: the first additive and carbon black are added to a mixer, the mixer is set at 300-400 r / min for mixing for 8-12 minutes, the obtained mixture is sent to an oven, the oven is set at 60-70° C. for drying for 10-20 minutes, then poured into a pressing mold, and the pressure is set at 30-40 MPa for pressing to obtain a pressed material, the pressed material is crushed and ground, and the ground particle size is 4-10 μm to obtain a premix.

9. The environmentally friendly cold-setting black ink according to claim 1, characterized in that: The eggshell powder is prepared by the following method: the eggshell powder raw material is selected from discarded egg shells recycled from a dessert shop, the egg shells are cleaned, and then sent to an oven after cleaning, and the oven is set at 60-70° C. for drying for 30-40 minutes, and after the drying is completed, the eggshell powder is ground to a particle size of 4-10 μm to prepare the eggshell powder.

10. The environmentally friendly cold-setting black ink according to claim 1, characterized in that: The environmentally friendly cold-setting black ink is prepared by the following method: S1: The premix is ​​mixed with water to prepare a first mixed solution; S2: Phenolic resin, petroleum resin, mineral oil, a second additive and a defoaming agent are mixed to prepare a second mixed liquid; S3: The first mixed liquid obtained in S1 is mixed with the second mixed liquid obtained in S2 to obtain a third mixed liquid, the third mixed liquid is allowed to stand until oil and water are separated, the upper water of the third mixed liquid is poured out, and the mixture is sent to a vacuum drying device with a set temperature of 80-100° C. and a pressure of 0.06-0.1 MPa to obtain a dehydrated material; S4: The dehydrated material is ground to a particle size of 1 to 3 μm. The ground product and vegetable oil are fed into a reactor. The reactor temperature is set at 40 to 60° C., the stirring speed is 80 to 120 r / min, and the heat preservation and stirring treatment is performed for 10 to 20 minutes to obtain an environmentally friendly cold-cured black ink.

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