White textile screen printing ink and preparation method thereof

Abstract

The invention provides white textile silk-screen printing ink and a preparation method thereof. The white textile silk-screen printing ink is prepared from the following raw materials in percentage by weight: 30.0 to 35.0 percent of white pigment, 40.0 to 45.0 percent of waterborne polyurethane resin, 0.5 percent of surface additive CL-410S, 0.5 percent of defoaming agent F-1501, 15.0 to 20.0 percent of deionized water and 1.0 to 2.0 percent of wetting agent. High uniformity, good printing performance and excellent drying effect of ink can be achieved, and the quality and production efficiency of textile silk-screen products are improved.

Description

Technical Field

[0001] The invention relates to the technical field of textile printing and dyeing, and more specifically to a white textile screen printing ink and a preparation method thereof. Background Art

[0002] In the field of textile printing and dyeing, screen printing is a commonly used technology that can achieve the printing of fine patterns and is suitable for a variety of textile materials. Traditional textile screen printing inks usually contain organic solvents, which not only pollute the environment but also may pose a threat to the health of operators. With the improvement of environmental awareness, the market demand for environmentally friendly textile screen printing inks is growing. However, existing water-based inks often cannot meet the needs of industrial production in terms of printing performance and drying speed, especially in the preparation of white inks. How to maintain the whiteness, hiding power and good printing adaptability of the ink is a technical challenge.

[0003] In the process of implementing the embodiments of the present invention, the inventors found that there are at least the following problems or defects in the prior art: the existing white textile screen printing ink often ignores the balance of environmental protection, printing adaptability and drying performance of the ink in the formulation design. In addition, the complexity of the preparation process and cost control are also important factors restricting its wide application. Summary of the invention

[0004] The invention provides a white textile screen printing ink and a preparation method thereof.

[0005] In a first aspect of the present invention, a white textile screen printing ink is provided, which is made of the following raw materials in weight percentage: 30.0-35.0% of white pigment, 40.0-45.0% of waterborne polyurethane resin, 0.5% of surface additive CL-410S, 0.5% of defoamer F-1501, 15.0-20.0% of deionized water and 1.0-2.0% of wetting agent.

[0006] Further, it is made of the following raw materials in weight percentage: 32.0% white pigment, 42.0% waterborne polyurethane resin, 0.5% surface additive CL-410S, 0.5% defoamer F-1501, 18.0% deionized water and 1.5% wetting agent.

[0007] Further, it is made of the following raw materials in weight percentage: 34.0% white pigment, 44.0% waterborne polyurethane resin, 0.5% surface additive CL-410S, 0.5% defoamer F-1501, 20.0% deionized water and 2.0% wetting agent.

[0008] Further, it is made of the following raw materials in weight percentage: 31.0% white pigment, 41.0% waterborne polyurethane resin, 0.5% surface additive CL-410S, 0.5% defoamer F-1501, 16.0% deionized water and 1.2% wetting agent.

[0009] Furthermore, the wetting agent is a combination of one or more of isopropyl alcohol, butanone, ethanol, propylene glycol methyl ether, and dimethylformamide.

[0010] Furthermore, the wetting agent is a mixture of isopropyl alcohol and butanone, and the weight ratio of the isopropyl alcohol to butanone is 1:1.

[0011] Furthermore, the wetting agent is ethanol, and by weight percentage, the ethanol is 1.0% and the white pigment is 32.0%.

[0012] Furthermore, the wetting agent is propylene glycol methyl ether, and the purity of the propylene glycol methyl ether is greater than 99%.

[0013] Furthermore, the preparation method of the white textile screen printing ink comprises the following steps:

[0014] S1. The white pigment and the aqueous polyurethane resin are mixed and stirred until a uniform slurry is formed;

[0015] S2. The surface additive CL-410S and the defoamer F-1501 are added to the slurry and stirred to mix evenly;

[0016] S3. Add deionized water and a wetting agent to the mixed slurry and adjust the viscosity to a suitable value;

[0017] S4. filtering the mixed slurry through a sieve to remove undissolved particles;

[0018] S5. Drying the filtered slurry at 50°C to 60°C until the moisture content is less than 5%;

[0019] S6.Finally pack and you are done.

[0020] Furthermore, in step S2, the uniformly mixed material is stirred in a high-speed mixer for 30 to 60 minutes.

[0021] The above-mentioned embodiments of the present invention have at least the following beneficial effects: the white textile screen printing ink of the present invention can improve the printing quality and production efficiency of the ink through the carefully designed raw material ratio and preparation process. The water-based polyurethane resin is used as the main film-forming material, and the appropriate amount of white pigment and other additives are matched, so that the ink has good hiding power and whiteness, while maintaining good fluidity and printing adaptability. In addition, through the optimized preparation steps, the viscosity and drying performance of the ink can be effectively controlled to ensure stability and uniformity during high-speed printing.

[0022] By using deionized water and a specific wetting agent, the ink formulation of the present invention can reduce the impact on the environment and reduce the potential risk to the health of operators. The selection and proportion of the wetting agent are carefully adjusted to ensure that the ink can maintain good wetting properties under different printing conditions, thereby improving the clarity and accuracy of the printed pattern. The screen filtering and drying steps in the preparation method further ensure the purity and quality of the ink, so that the final product has excellent printing effects and market competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and other objects, features and advantages of the exemplary embodiments of the present invention will become readily understood by reading the detailed description below with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, in which:

[0024] Figure 1 A schematic flow chart of a method for preparing white textile screen printing ink provided in one embodiment of the present invention. DETAILED DESCRIPTION

[0025] The principles and spirit of the present invention will be described below with reference to several exemplary embodiments. It should be understood that these embodiments are provided only to enable those skilled in the art to better understand and implement the present invention, and are not intended to limit the scope of the present invention in any way. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0026] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. All features disclosed in this specification, or steps in all methods or processes disclosed, except for mutually exclusive characteristics and / or steps, can be combined in any way, unless otherwise described, and can be replaced by other equivalent or alternative features with similar purposes, that is, unless otherwise described, each feature is only one embodiment in a series of equivalent or similar features.

[0027] Example 1: A method for preparing a white textile screen printing ink, which is made from the following raw materials in weight percentage: 32.0% white pigment, 42.0% water-based polyurethane resin, 0.5% surface additive CL-410S, 0.5% defoamer F-1501, 18.0% deionized water and 1.5% wetting agent.

[0028] The preparation method of this embodiment comprises the following steps:

[0029] S1. The white pigment and the aqueous polyurethane resin were mixed in a mixer for 30 minutes until a uniform slurry was formed;

[0030] S2. The surface additive CL-410S and the defoamer F-1501 were added to the slurry and stirred in a high-speed mixer for 60 minutes to ensure uniform mixing;

[0031] S3. Deionized water and a wetting agent are added to the mixed slurry and adjusted to a suitable viscosity. The wetting agent is a mixture of isopropanol and butanone in a weight ratio of 1:1;

[0032] S4. The mixed slurry is filtered through a 200-mesh screen to remove undissolved particles to obtain a pure ink slurry;

[0033] S5. Drying the filtered slurry at 55°C until the moisture content is less than 5% to ensure the stability of the ink;

[0034] S6. Finally, the dried slurry is packaged to obtain white textile screen printing ink.

[0035] In this embodiment, the selection and proportion of the wetting agent are carefully adjusted to ensure that the ink can maintain good wetting properties under different printing conditions, thereby improving the clarity and accuracy of the printed pattern. In addition, by controlling the drying temperature and time, the moisture content of the ink can be controlled below 5%, thereby improving the storage stability of the ink.

[0036] Experimental data:

[0037] Synthesis method: Follow the above steps S1 to S6.

[0038] Reaction conditions: Mixing and stirring for 30 minutes, high-speed stirring for 60 minutes, sieve filtering with 200 mesh, drying temperature of 55°C, and drying time until the moisture content is less than 5%.

[0039] Yield: The theoretical yield is 100%, and the actual yield depends on the actual production conditions.

[0040] Purity: Through testing, the purity of each component in the ink meets the requirements of industrial production.

[0041] Uses and effects: This white textile screen printing ink is suitable for screen printing of various textile materials and has good printing adaptability and drying performance. Experiments show that the patterns printed using this ink are clear and colorful, and the drying speed is fast, which improves production efficiency.

[0042] Example 2: A method for preparing a white textile screen printing ink, which is made from the following raw materials in weight percentage: 34.0% white pigment, 44.0% water-based polyurethane resin, 0.5% surface additive CL-410S, 0.5% defoamer F-1501, 20.0% deionized water and 2.0% wetting agent.

[0043] The preparation method of this embodiment comprises the following steps:

[0044] S1. The white pigment and the aqueous polyurethane resin were mixed in a mixer for 30 minutes until a uniform slurry was formed;

[0045] S2. The surface additive CL-410S and the defoamer F-1501 were added to the slurry and stirred in a high-speed mixer for 60 minutes to ensure uniform mixing;

[0046] S3. Add deionized water and a wetting agent to the mixed slurry and adjust to a suitable viscosity, wherein the wetting agent is propylene glycol methyl ether with a purity greater than 99%;

[0047] S4. The mixed slurry is filtered through a 200-mesh screen to remove undissolved particles to obtain a pure ink slurry;

[0048] S5. Drying the filtered slurry at 58° C. until the moisture content is less than 5% to ensure the stability of the ink;

[0049] S6. Finally, the dried slurry is packaged to obtain white textile screen printing ink.

[0050] In this embodiment, high-purity propylene glycol methyl ether is selected as the wetting agent to improve the wetting performance and printing quality of the ink. By accurately controlling the drying temperature and time, the water content of the ink can be controlled below 5%, thereby improving the storage stability of the ink.

[0051] Experimental data:

[0052] Synthesis method: Follow the above steps S1 to S6.

[0053] Reaction conditions: Mixing and stirring for 30 minutes, high-speed stirring for 60 minutes, sieve filtering with 200 mesh, drying temperature of 58°C, and drying time until the moisture content is less than 5%.

[0054] Yield: The theoretical yield is 100%, and the actual yield depends on the actual production conditions.

[0055] Purity: Through testing, the purity of each component in the ink meets the requirements of industrial production.

[0056] Uses and effects: This white textile screen printing ink is suitable for screen printing of various textile materials and has good printing adaptability and drying performance. Experiments show that the patterns printed using this ink are clear and colorful, and the drying speed is fast, which improves production efficiency.

[0057] Example 3: A method for preparing a white textile screen printing ink, which is made from the following raw materials in weight percentage: 31.0% white pigment, 41.0% water-based polyurethane resin, 0.5% surface additive CL-410S, 0.5% defoamer F-1501, 16.0% deionized water and 1.2% wetting agent.

[0058] The preparation method of this embodiment comprises the following steps:

[0059] S1. The white pigment and the aqueous polyurethane resin were mixed in a mixer for 30 minutes until a uniform slurry was formed;

[0060] S2. The surface additive CL-410S and the defoamer F-1501 were added to the slurry and stirred in a high-speed mixer for 45 minutes to ensure uniform mixing;

[0061] S3. Deionized water and a wetting agent are added to the mixed slurry and adjusted to a suitable viscosity. The wetting agent is ethanol, and the ethanol is 1.0% by weight;

[0062] S4. The mixed slurry is filtered through a 150-mesh sieve to remove undissolved particles to obtain a pure ink slurry;

[0063] S5. Drying the filtered slurry at 50° C. until the moisture content is less than 5% to ensure the stability of the ink;

[0064] S6. Finally, the dried slurry is packaged to obtain white textile screen printing ink.

[0065] In this embodiment, ethanol is selected as the wetting agent to improve the wetting performance and printing quality of the ink. By accurately controlling the drying temperature and time, the water content of the ink can be controlled below 5%, thereby improving the storage stability of the ink.

[0066] Experimental data:

[0067] Synthesis method: Follow the above steps S1 to S6.

[0068] Reaction conditions: Mix and stir for 30 minutes, stir at high speed for 45 minutes, filter with a 150 mesh screen, dry at 50°C, and dry until the moisture content is less than 5%.

[0069] Yield: The theoretical yield is 100%, and the actual yield depends on the actual production conditions.

[0070] Purity: Through testing, the purity of each component in the ink meets the requirements of industrial production.

[0071] Uses and effects: This white textile screen printing ink is suitable for screen printing of various textile materials and has good printing adaptability and drying performance. Experiments show that the patterns printed using this ink are clear and colorful, and the drying speed is fast, which improves production efficiency.

[0072] Example 4: A method for preparing a white textile screen printing ink, which is made from the following raw materials in weight percentage: 30.0% white pigment, 40.0% water-based polyurethane resin, 0.5% surface additive CL-410S, 0.5% defoamer F-1501, 15.0% deionized water and 1.0% wetting agent.

[0073] The preparation method of this embodiment comprises the following steps:

[0074] S1. The white pigment and the aqueous polyurethane resin were mixed in a mixer for 30 minutes until a uniform slurry was formed;

[0075] S2. The surface additive CL-410S and the defoamer F-1501 were added to the slurry and stirred in a high-speed mixer for 45 minutes to ensure uniform mixing;

[0076] S3. Deionized water and a wetting agent are added to the mixed slurry and adjusted to a suitable viscosity. The wetting agent is a mixture of isopropanol and butanone in a weight ratio of 1:1;

[0077] S4. The mixed slurry is filtered through a 100-mesh sieve to remove undissolved particles to obtain a pure ink slurry;

[0078] S5. Drying the filtered slurry at 55°C until the moisture content is less than 5% to ensure the stability of the ink;

[0079] S6. Finally, the dried slurry is packaged to obtain white textile screen printing ink.

[0080] In this embodiment, a mixture of isopropyl alcohol and butanone is selected as the wetting agent to improve the wetting performance and printing quality of the ink. By accurately controlling the drying temperature and time, the water content of the ink can be controlled below 5%, thereby improving the storage stability of the ink.

[0081] Experimental data:

[0082] Synthesis method: Follow the above steps S1 to S6.

[0083] Reaction conditions: Mix and stir for 30 minutes, stir at high speed for 45 minutes, filter through a 100-mesh screen, dry at 55°C, and dry until the moisture content is less than 5%.

[0084] Yield: The theoretical yield is 100%, and the actual yield depends on the actual production conditions.

[0085] Purity: Through testing, the purity of each component in the ink meets the requirements of industrial production.

[0086] Uses and effects: This white textile screen printing ink is suitable for screen printing of various textile materials and has good printing adaptability and drying performance. Experiments show that the patterns printed using this ink are clear and colorful, and the drying speed is fast, which improves production efficiency.

[0087] Embodiment 5: A method for preparing a white textile screen printing ink, characterized in that the wetting agent is a combination of one or more of isopropyl alcohol, butanone, ethanol, propylene glycol methyl ether, and dimethylformamide.

[0088] The preparation method of this embodiment comprises the following steps:

[0089] S1. The white pigment and the aqueous polyurethane resin were mixed in a mixer for 30 minutes until a uniform slurry was formed;

[0090] S2. The surface additive CL-410S and the defoamer F-1501 were added to the slurry and stirred in a high-speed mixer for 60 minutes to ensure uniform mixing;

[0091] S3. Deionized water and a wetting agent are added to the mixed slurry and adjusted to a suitable viscosity. The wetting agent is a mixture of isopropanol and butanone in a weight ratio of 1:1;

[0092] S4. The mixed slurry is filtered through a 200-mesh screen to remove undissolved particles to obtain a pure ink slurry;

[0093] S5. Drying the filtered slurry at 55°C until the moisture content is less than 5% to ensure the stability of the ink;

[0094] S6. Finally, the dried slurry is packaged to obtain white textile screen printing ink.

[0095] In this embodiment, the wetting agent is a mixture of isopropyl alcohol and butanone, which can provide good wetting properties and printing adaptability. By accurately controlling the drying temperature and time, the water content of the ink can be controlled below 5%, thereby improving the storage stability of the ink.

[0096] Experimental data:

[0097] Synthesis method: Follow the above steps S1 to S6.

[0098] Reaction conditions: Mixing and stirring for 30 minutes, high-speed stirring for 60 minutes, sieve filtering with 200 mesh, drying temperature of 55°C, and drying time until the moisture content is less than 5%.

[0099] Yield: The theoretical yield is 100%, and the actual yield depends on the actual production conditions.

[0100] Purity: Through testing, the purity of each component in the ink meets the requirements of industrial production.

[0101] Uses and effects: This white textile screen printing ink is suitable for screen printing of various textile materials and has good printing adaptability and drying performance. Experiments show that the patterns printed using this ink are clear and colorful, and the drying speed is fast, which improves production efficiency.

[0102] Example 6: A method for preparing a white textile screen printing ink, characterized in that the wetting agent is a mixture of isopropyl alcohol and butanone, and the weight ratio of the isopropyl alcohol to butanone is 1:1.

[0103] The preparation method of this embodiment comprises the following steps:

[0104] S1. The white pigment and the aqueous polyurethane resin were mixed in a mixer for 30 minutes until a uniform slurry was formed;

[0105] S2. The surface additive CL-410S and the defoamer F-1501 were added to the slurry and stirred in a high-speed mixer for 60 minutes to ensure uniform mixing;

[0106] S3. Deionized water and a wetting agent are added to the mixed slurry and adjusted to a suitable viscosity, wherein the wetting agent is a mixture of isopropanol and butanone in a weight ratio of 1:1;

[0107] S4. The mixed slurry is filtered through a 200-mesh screen to remove undissolved particles to obtain a pure ink slurry;

[0108] S5. Drying the filtered slurry at 55°C until the moisture content is less than 5% to ensure the stability of the ink;

[0109] S6. Finally, the dried slurry is packaged to obtain white textile screen printing ink.

[0110] In this embodiment, the specific proportion of the wetting agent can optimize the wetting performance and printing quality of the ink, ensuring that the wetting performance is good under different printing conditions, thereby improving the clarity and accuracy of the printed pattern.

[0111] Experimental data:

[0112] Synthesis method: Follow the above steps S1 to S6.

[0113] Reaction conditions: Mix and stir for 30 minutes, stir at high speed for 60 minutes, filter through a 200 mesh screen, dry at 55°C, and dry until the moisture content is less than 5%.

[0114] Yield: The theoretical yield is 100%, and the actual yield depends on the actual production conditions.

[0115] Purity: Through testing, the purity of each component in the ink meets the requirements of industrial production.

[0116] Uses and effects: This white textile screen printing ink is suitable for screen printing of various textile materials and has good printing adaptability and drying performance. Experiments show that the patterns printed using this ink are clear and colorful, and the drying speed is fast, which improves production efficiency.

[0117] Example 7: A method for preparing a white textile screen printing ink, characterized in that the wetting agent is ethanol, and by weight percentage, the ethanol is 1.0% and the white pigment is 32.0%.

[0118] The preparation method of this embodiment comprises the following steps:

[0119] S1. The white pigment and the aqueous polyurethane resin were mixed in a mixer for 30 minutes until a uniform slurry was formed;

[0120] S2. The surface additive CL-410S and the defoamer F-1501 were added to the slurry and stirred in a high-speed mixer for 60 minutes to ensure uniform mixing;

[0121] S3. Deionized water and a wetting agent are added to the mixed slurry and adjusted to a suitable viscosity. The wetting agent is ethanol, and the ethanol is 1.0% by weight;

[0122] S4. The mixed slurry is filtered through a 200-mesh screen to remove undissolved particles to obtain a pure ink slurry;

[0123] S5. Drying the filtered slurry at 55°C until the moisture content is less than 5% to ensure the stability of the ink;

[0124] S6. Finally, the dried slurry is packaged to obtain white textile screen printing ink.

[0125] In this embodiment, ethanol is selected as the wetting agent, which can provide good wetting performance and printing adaptability. The addition of ethanol helps to reduce the surface tension of the ink and improve the spreadability of the ink on the textile, thereby improving the clarity and accuracy of the printed pattern.

[0126] Experimental data:

[0127] Synthesis method: Follow the above steps S1 to S6.

[0128] Reaction conditions: Mixing and stirring for 30 minutes, high-speed stirring for 60 minutes, sieve filtering with 200 mesh, drying temperature of 55°C, and drying time until the moisture content is less than 5%.

[0129] Yield: The theoretical yield is 100%, and the actual yield depends on the actual production conditions.

[0130] Purity: Through testing, the purity of each component in the ink meets the requirements of industrial production.

[0131] Uses and effects: This white textile screen printing ink is suitable for screen printing of various textile materials and has good printing adaptability and drying performance. Experiments show that the patterns printed using this ink are clear and colorful, and the drying speed is fast, which improves production efficiency.

[0132] Embodiment 8: A method for preparing a white textile screen printing ink, characterized in that the wetting agent is propylene glycol methyl ether, and the purity of the propylene glycol methyl ether is greater than 99%.

[0133] The preparation method of this embodiment comprises the following steps:

[0134] S1. The white pigment and the aqueous polyurethane resin were mixed in a mixer for 30 minutes until a uniform slurry was formed;

[0135] S2. The surface additive CL-410S and the defoamer F-1501 were added to the slurry and stirred in a high-speed mixer for 60 minutes to ensure uniform mixing;

[0136] S3. Deionized water and a wetting agent are added to the mixed slurry and adjusted to a suitable viscosity, wherein the wetting agent is propylene glycol methyl ether having a purity greater than 99%;

[0137] S4. The mixed slurry is filtered through a 200-mesh screen to remove undissolved particles to obtain a pure ink slurry;

[0138] S5. Drying the filtered slurry at 55°C until the moisture content is less than 5% to ensure the stability of the ink;

[0139] S6. Finally, the dried slurry is packaged to obtain white textile screen printing ink.

[0140] In this embodiment, high-purity propylene glycol methyl ether is used as a wetting agent, which can provide good wetting properties and printing adaptability. The addition of propylene glycol methyl ether helps to improve the fluidity and permeability of the ink, thereby improving the clarity and accuracy of the printed pattern.

[0141] Experimental data:

[0142] Synthesis method: Follow the above steps S1 to S6.

[0143] Reaction conditions: Mixing and stirring for 30 minutes, high-speed stirring for 60 minutes, sieve filtering with 200 mesh, drying temperature of 55°C, and drying time until the moisture content is less than 5%.

[0144] Yield: The theoretical yield is 100%, and the actual yield depends on the actual production conditions.

[0145] Purity: Through testing, the purity of each component in the ink meets the requirements of industrial production.

[0146] Uses and effects: This white textile screen printing ink is suitable for screen printing of various textile materials and has good printing adaptability and drying performance. Experiments show that the patterns printed using this ink are clear and colorful, and the drying speed is fast, which improves production efficiency.

[0147] like Figure 1 Example 9: A method for preparing a white textile screen printing ink, characterized by comprising the following steps:

[0148] S1. The white pigment and the aqueous polyurethane resin are mixed and stirred until a uniform slurry is formed;

[0149] S2. The surface additive CL-410S and the defoamer F-1501 are added to the slurry and stirred to mix evenly;

[0150] S3. Add deionized water and a wetting agent to the mixed slurry and adjust the viscosity to a suitable value;

[0151] S4. filtering the mixed slurry through a sieve to remove undissolved particles;

[0152] S5. Drying the filtered slurry at 50°C to 60°C until the moisture content is less than 5%;

[0153] S6.Finally pack and you are done.

[0154] The detailed steps of this embodiment are as follows:

[0155] S1. 32.0% of white pigment and 42.0% of waterborne polyurethane resin were mixed in a mixer for 30 minutes until a uniform slurry was formed;

[0156] S2. 0.5% of the surface additive CL-410S and 0.5% of the defoamer F-1501 were added to the slurry and stirred in a high-speed mixer for 60 minutes to ensure uniform mixing;

[0157] S3. 18.0% deionized water and 1.5% wetting agent (a mixture of isopropyl alcohol and butanone, weight ratio of 1:1) were added to the mixed slurry and adjusted to a suitable viscosity;

[0158] S4. The mixed slurry is filtered through a 200-mesh screen to remove undissolved particles to obtain a pure ink slurry;

[0159] S5. Drying the filtered slurry at 55°C until the moisture content is less than 5% to ensure the stability of the ink;

[0160] S6. Finally, the dried slurry is packaged to obtain white textile screen printing ink.

[0161] In this embodiment, by precisely controlling the ratio of various raw materials and the preparation steps, it is possible to ensure that the ink has good printing performance and drying characteristics. The use of a screen filtration step ensures the purity of the ink, while the precisely controlled drying step ensures the stability and quality of the ink.

[0162] Experimental data:

[0163] Synthesis method: Follow the above steps S1 to S6.

[0164] Reaction conditions: Mix and stir for 30 minutes, stir at high speed for 60 minutes, filter through a 200 mesh screen, dry at 55°C, and dry until the moisture content is less than 5%.

[0165] Yield: The theoretical yield is 100%, and the actual yield depends on the actual production conditions.

[0166] Purity: Through testing, the purity of each component in the ink meets the requirements of industrial production.

[0167] Uses and effects: This white textile screen printing ink is suitable for screen printing of various textile materials and has good printing adaptability and drying performance. Experiments show that the patterns printed using this ink are clear and colorful, and the drying speed is fast, which improves production efficiency.

[0168] Example 10: A method for preparing white textile screen printing ink, characterized in that in step S2, the uniformly mixed materials are stirred in a high-speed stirrer for 30 to 60 minutes.

[0169] The preparation method of this embodiment comprises the following steps:

[0170] S1. The white pigment and the aqueous polyurethane resin are mixed in a mixer until a uniform slurry is formed;

[0171] S2. The surface additive CL-410S and the defoamer F-1501 were added to the slurry and stirred in a high-speed mixer for 60 minutes to ensure uniform mixing;

[0172] S3. Add deionized water and a wetting agent to the mixed slurry and adjust the viscosity to a suitable value;

[0173] S4. filtering the mixed slurry through a sieve to remove undissolved particles;

[0174] S5. Drying the filtered slurry at 50°C to 60°C until the moisture content is less than 5%;

[0175] S6.Finally pack and you are done.

[0176] The detailed steps of this embodiment are as follows:

[0177] S1. 34.0% of white pigment and 44.0% of waterborne polyurethane resin were mixed in a mixer for 30 minutes until a uniform slurry was formed;

[0178] S2. 0.5% of the surface additive CL-410S and 0.5% of the defoamer F-1501 were added to the slurry and stirred in a high-speed mixer for 60 minutes to ensure uniform mixing;

[0179] S3. Add 20.0% deionized water and 2.0% wetting agent (propylene glycol methyl ether, purity greater than 99%) to the mixed slurry and adjust to an appropriate viscosity;

[0180] S4. The mixed slurry is filtered through a 200-mesh screen to remove undissolved particles to obtain a pure ink slurry;

[0181] S5. Drying the filtered slurry at 55°C until the moisture content is less than 5% to ensure the stability of the ink;

[0182] S6. Finally, the dried slurry is packaged to obtain white textile screen printing ink.

[0183] In this embodiment, by extending the stirring time in the high-speed mixer to 60 minutes, the materials can be mixed more evenly, thereby improving the quality and performance of the ink. This improved preparation method helps to improve the stability of the ink and the printing effect.

[0184] Experimental data:

[0185] Synthesis method: Follow the above steps S1 to S6.

[0186] Reaction conditions: Mix and stir for 30 minutes, stir at high speed for 60 minutes, filter through a 200 mesh screen, dry at 55°C, and dry until the moisture content is less than 5%.

[0187] Yield: The theoretical yield is 100%, and the actual yield depends on the actual production conditions.

[0188] Purity: Through testing, the purity of each component in the ink meets the requirements of industrial production.

[0189] Uses and effects: This white textile screen printing ink is suitable for screen printing of various textile materials and has good printing adaptability and drying performance. Experiments show that the patterns printed using this ink are clear and colorful, and the drying speed is fast, which improves production efficiency.

[0190] Comparative Example 1

[0191] This comparative example is a traditional white textile screen printing ink, which is prepared from the following raw materials in percentage by weight:

[0192] White pigment 25%, waterborne polyurethane resin 35%, surface additive CL-410S 0.3%, defoamer F-150 10.3%, deionized water 25% and wetting agent 1.0%;

[0193] The preparation method of the above ink comprises the following steps:

[0194] (a) mixing and stirring a white pigment and an aqueous polyurethane resin until a uniform slurry is formed;

[0195] (b) Add the surface additive CL-410S and the defoamer F-1501 to the slurry and continue to stir and mix evenly;

[0196] (c) adding deionized water and a wetting agent to the mixed slurry to adjust the viscosity to a suitable value;

[0197] (d) filtering the mixed slurry through a sieve to remove undissolved particles;

[0198] (e) drying the filtered slurry at room temperature until the moisture content is less than 10%;

[0199] (f) Final packaging.

[0200] Comparative Example 2

[0201] This comparative example is a traditional white textile screen printing ink, which is prepared from the following raw materials in percentage by weight:

[0202] White pigment 28%, waterborne polyurethane resin 40%, surface additive CL-410S 0.8%, defoamer F-15010.8%, deionized water 20% and wetting agent 2.0%;

[0203] The preparation method of the above ink comprises the following steps:

[0204] (a) mixing and stirring a white pigment and an aqueous polyurethane resin until a uniform slurry is formed;

[0205] (b) Add the surface additive CL-410S and the defoamer F-1501 to the slurry and continue to stir and mix evenly;

[0206] (c) adding deionized water and a wetting agent to the mixed slurry to adjust the viscosity to a suitable value;

[0207] (d) filtering the mixed slurry through a sieve to remove undissolved particles;

[0208] (e) drying the filtered slurry at 60° C. until the moisture content is less than 5%;

[0209] (f) Final packaging.

[0210] Experimental example

[0211] Obtain the white textile screen printing inks prepared in Example 5 and Comparative Examples 1-2 respectively;

[0212] The above ink was used to perform screen printing on a cotton T-shirt, and the printed pattern was a complex pattern with high precision; among them, 63 samples were printed with the ink of Example 5, 41 samples were printed with the ink of Comparative Example 1, and 36 samples were printed with the ink of Comparative Example 2;

[0213] Printing conditions:

[0214] Use 200 mesh screen, printing pressure is 2kg / cm2, printing speed is 30 times / minute;

[0215] After printing, the T-shirts were dried at room temperature and then tested for performance;

[0216] Test items include the hiding power, adhesion, abrasion resistance and color vividness of the ink;

[0217] The test results are shown in Tables 1 to 3:

[0218] Table 1 Printing performance test results

[0219] Test items Example 5 Comparative Example 1 Comparative Example 2 Covering power excellent good generally Adhesion excellent good good Wear resistance excellent good generally Color Vividness excellent good good

[0220] Table 2 Performance test results after washing

[0221] Test items Example 5 Comparative Example 1 Comparative Example 2 Covering power excellent good generally Adhesion excellent good good Wear resistance excellent generally Poor Color Vividness excellent good generally

[0222] Table 3 Wear resistance test results

[0223]

[0224]

[0225] From Tables 1 to 3, we can see that:

[0226] The white textile screen printing ink prepared by the technical solution of the present application and the comparative example both exhibit good printing performance on cotton T-shirts. Compared with the comparative example, the ink prepared by the technical solution of the present application has significant advantages in hiding power, adhesion, wear resistance and color vividness.

[0227] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

[0228] The above descriptions are only some preferred embodiments of the present invention and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the embodiments of the present invention is not limited to the technical solutions formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the embodiments of the present invention to form a technical solution.

Claims

1. A white textile screen printing ink, characterized in that: The invention is prepared from the following raw materials in percentage by weight: 30.0-35.0% of white pigment, 40.0-45.0% of waterborne polyurethane resin, 0.5% of surface additive CL-410S, 0.5% of defoaming agent F-1501, 15.0-20.0% of deionized water and 1.0-2.0% of wetting agent.

2. The white textile screen printing ink according to claim 1, characterized in that: The invention is prepared from the following raw materials in percentage by weight: 32.0% white pigment, 42.0% waterborne polyurethane resin, 0.5% surface additive CL-410S, 0.5% defoamer F-1501, 18.0% deionized water and 1.5% wetting agent.

3. The white textile screen printing ink according to claim 1, characterized in that: The invention is prepared from the following raw materials in weight percentage: 34.0% white pigment, 44.0% waterborne polyurethane resin, 0.5% surface additive CL-410S, 0.5% defoamer F-1501, 20.0% deionized water and 2.0% wetting agent.

4. The white textile screen printing ink according to claim 1, characterized in that: The invention is prepared from the following raw materials in weight percentage: 31.0% white pigment, 41.0% waterborne polyurethane resin, 0.5% surface additive CL-410S, 0.5% defoamer F-1501, 16.0% deionized water and 1.2% wetting agent.

5. The white textile screen printing ink according to claim 1, characterized in that: The wetting agent is a combination of one or more of isopropyl alcohol, butanone, ethanol, propylene glycol methyl ether and dimethylformamide.

6. The white textile screen printing ink according to claim 5, characterized in that: The wetting agent is a mixture of isopropyl alcohol and butanone, and the weight ratio of the isopropyl alcohol to butanone is 1:

1.

7. The white textile screen printing ink according to claim 5, characterized in that: The wetting agent is ethanol, and by weight percentage, the ethanol is 1.0% and the white pigment is 32.0%.

8. The white textile screen printing ink according to claim 5, characterized in that: The wetting agent is propylene glycol methyl ether, and the purity of the propylene glycol methyl ether is greater than 99%.

9. A method for preparing the white textile screen printing ink according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1. The white pigment and the aqueous polyurethane resin are mixed and stirred until a uniform slurry is formed; S2. The surface additive CL-410S and the defoamer F-1501 are added to the slurry and stirred to mix evenly; S3. Add deionized water and a wetting agent to the mixed slurry and adjust the viscosity to a suitable value; S4. filtering the mixed slurry through a sieve to remove undissolved particles; S5. Dry the filtered slurry at 50°C to 60°C until the moisture content is less than 5%; S6.Finally pack and you are done.

10. The method for preparing the white textile screen printing ink according to claim 1, characterized in that: In step S2, the uniformly mixed materials are stirred in a high-speed mixer for 30 to 60 minutes.

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