High-permeability heat transfer printing disperse dye ink and preparation method thereof, and preparation method of disperse dye microcapsule
The dye is separated by capsule encapsulation technology, and the time difference is used to achieve rapid penetration and uniform dyeing of the dye, which solves the problem of insufficient permeability of thermal transfer ink and improves the dyeing effect.
Patent Information
- Application Number
- CN202510658859.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-21
- Publication Date
- 2025-10-17
AI Technical Summary
Existing thermal transfer inks have insufficient permeability, which prevents the dye from fully penetrating the fabric, resulting in problems such as white spots, yarn turning, and positive and negative contrast.
The encapsulation technology is used to separate the first disperse dye and the second disperse dye. The time difference is used to allow the second disperse dye to enter the fiber first. The first disperse dye is released during the thermal transfer process and combines with the fabric fiber, inhibiting the dye competition reaction and improving the permeability and dyeing uniformity.
It achieves rapid dye penetration and uniform dyeing, improves color saturation and dyeing effect, and is suitable for a variety of fiber materials.
Smart Images
Figure BDA0005413216720000091 
Figure BDA0005413216720000101 
Figure BDA0005413216720000102
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of digital printing inkjet printing technology, and in particular to a high-permeability heat transfer printing disperse dye ink, a preparation method thereof and a preparation method of disperse dye microcapsules. BACKGROUND
[0002] As an important tool for textile printing, heat transfer printing ink has been widely used in the fields of clothing, home textiles, and personalized customization. With the continuous growth of market demand, the types of fabrics for textile printing are increasingly diversified, from traditional mesh fabrics, stretch fabrics, to functional fabrics such as spandex and coral fleece. The application scenarios of heat transfer printing technology continue to expand. However, heat transfer printing ink also faces some technical challenges in practical application, especially the defect of insufficient permeability, which causes the application of heat transfer printing ink to have problems such as "white showing", "silk showing", and "positive-negative difference" on short pile fabrics such as polyester, chiffon, spandex, and coral fleece. White showing refers to the phenomenon that after heat transfer printing, the color is only printed on the surface of the fabric, and when the fabric is touched or pulled in the opposite direction, the white background without color printing is exposed, which seriously affects the product quality. Silk showing refers to the phenomenon that the ink is only printed on the surface of the fabric without penetrating the inside. After making clothes or scarves, the white thread eyes will be exposed at the fabric needle line, which seriously affects the aesthetics and quality of the product. Positive-negative difference refers to the phenomenon that the ink can only be transferred to one side during heat transfer printing, and the color does not penetrate to the other side, resulting in a large color difference between the front and back, especially for thin fabrics such as chiffon and silk scarves, which are very uncoordinated when worn.
[0003] The above problems are caused by the fact that ordinary heat transfer printing ink can only be printed on the surface of the fabric, and the dye cannot fully penetrate into the inside of the fabric, causing surface dyeing. It has been found through research that the reason why heat transfer printing ink can only be printed on the surface of the fabric is that the ink has insufficient permeability, and the dye cannot quickly and uniformly penetrate into the inside of the fiber. At the same time, different dyes are prone to dyeing competition during transfer printing, affecting dyeing uniformity and permeability. SUMMARY
[0004] The first object of the present application is to provide a high-permeability heat transfer printing disperse dye ink to solve the problem of insufficient permeability of existing heat transfer printing ink, and severe dyeing competition of dyes, which leads to uneven dyeing and poor permeability.
[0005] The second object of the present application is to provide a preparation method of disperse dye microcapsules for preparing the first disperse dye microcapsules in the above-mentioned high-permeability heat transfer printing disperse dye ink.
[0006] The third object of the present application is to provide a preparation method of high-permeability heat transfer printing disperse dye ink for preparing the above-mentioned high-permeability heat transfer printing disperse dye ink.
[0007] To achieve the first object of the present application, the high-permeability heat transfer printing disperse dye ink comprises a first disperse dye colorant and a second disperse dye colorant; the first disperse dye colorant comprises first disperse dye microcapsules, and the first disperse dye microcapsules are formed by processing the first disperse dye through a microcapsule coating technology; the second disperse dye colorant comprises a second disperse dye; the molecular weight of the first disperse dye is greater than that of the second disperse dye.
[0008] As can be seen from the above scheme, the first disperse dye and the second disperse dye are separated by the microcapsule coating technology, and the first disperse dye and the second disperse dye are combined with the fabric fibers at different times, the second disperse dye enters the fiber interior preferentially, and rapid penetration is achieved; the first disperse dye is in the form of microcapsules, and in the heat transfer printing process, the coating material of the microcapsules is dissolved by heat to release the first disperse dye inside, and then the first disperse dye is combined with the fabric fibers. The first disperse dye is configured into microcapsules, the time difference of release is utilized to inhibit the dyeing competition phenomenon between the disperse dyes, the dyes can all react with the fibers, the color saturation is improved, the dyeing is uniform, and the penetration effect is good.
[0009] Further, the molecular weight of the first disperse dye in the first disperse dye microcapsules is 280 to 350; and the molecular weight of the second disperse dye is 200 to 280.
[0010] As can be seen from the above scheme, the second disperse dye has a smaller molecular weight and is more easily entered into the fiber interior, thereby achieving rapid penetration, and the second disperse dye has a larger molecular weight and is more suitable for surface dyeing, thereby improving the color saturation.
[0011] Further, the first disperse dye colorant further comprises 35% to 45% of a first dispersant by mass percentage, and the first dispersant is at least one selected from a benzene propyl resin solution, an acrylate copolymer, and a styrene maleic anhydride copolymer; and the second disperse dye colorant further comprises 30% to 40% of a second dispersant by mass percentage, and the second dispersant is at least one selected from a benzene propyl resin solution, an acrylate copolymer, and a styrene maleic anhydride copolymer.
[0012] Further, the first dispersant and the second dispersant are the same.
[0013] As can be seen from the above scheme, the first dispersant and the second dispersant can effectively improve the dispersion stability of the disperse dye, reduce the interaction between the particles, prevent aggregation and precipitation, and make the dye uniformly dispersed in the dyeing solution.
[0014] Further, the first disperse dye colorant comprises 25% to 30% of the first disperse dye microcapsules by mass percentage; and the second disperse dye colorant comprises 20% to 25% of the second disperse dye by mass percentage.
[0015] From the above scheme, it can be seen that under the above content, the disperse dye can achieve excellent dispersion stability and good dyeing effect, significantly improve the dyeing uniformity and color brightness.
[0016] Further, the heat transfer printing disperse dye ink comprises 10-30% of the first disperse dye paste, 10-25% of the second disperse dye paste, 15-30% of the organic solvent, 0.5-5% of the auxiliary agent, and the balance of water.
[0017] Further, the auxiliary agent comprises at least one of a surfactant and a bactericide.
[0018] From the above scheme, it can be seen that the heat transfer printing disperse dye ink under the above content ratio can achieve high permeability, high color saturation, achieve excellent dyeing effect, and be suitable for various fiber materials, including but not limited to polyester, polyester fiber, etc., and has good universality.
[0019] To achieve the second object of the present application, a preparation method of a disperse dye microcapsule is used to prepare the first disperse dye microcapsule in the heat transfer printing high-permeability heat transfer printing disperse dye ink according to any one of the above schemes. The preparation method comprises the following steps: preparation of a dye dispersion liquid: adding a first disperse dye into a first solvent, stirring until the first disperse dye is completely dissolved, then adding an emulsifier and stirring uniformly to obtain a dye dispersion liquid; dissolving of a wall material: adding a wall material into a second solvent, heating to 60-70℃, and stirring until the wall material is completely dissolved to obtain a wall material solution; mixing of the dye dispersion liquid and the wall material solution: slowly adding the dye dispersion liquid into the wall material solution, stirring uniformly, then adding a pH adjuster to adjust the pH value to 5-6, and continuing to stir uniformly to obtain a mixed solution; homogenization treatment: transferring the mixed solution to a homogenizer for homogenization treatment until the first disperse dye is uniformly dispersed in the wall material solution; spray drying treatment: drying the mixed solution after the homogenization treatment by a spray drying device, controlling the inlet air temperature to be 120-140℃ and the outlet air temperature to be 80-90℃, and collecting the dried powder to obtain the first disperse dye microcapsule.
[0020] From the above scheme, it can be seen that the spray drying method is used to prepare the microcapsule, which has low preparation cost, simple and efficient operation, stable quality of the prepared microcapsule, is suitable for continuous large-scale production, and has wide application range.
[0021] Further, in the preparation step of the dye dispersion liquid, the mass ratio of the first disperse dye to the emulsifier is 10:1.
[0022] From the above scheme, it can be seen that under the above ratio, the addition of the emulsifier is beneficial to ensure the quality of the subsequent microcapsule preparation.
[0023] Further, the wall material is selected from at least one of polylactic acid, gelatin or gum arabic; and the emulsifier is selected from at least one of polyacrylate and polyether polyol.
[0024] According to the above scheme, the wall material is environmentally friendly, does not pollute the environment, and can be dissolved and broken during the heat transfer process, so that the disperse dye is released.
[0025] Further, the first solvent is selected from at least one of acetone and ethanol; and the second solvent is selected from at least one of ethyl acetate and ethanol.
[0026] To achieve the third object of the present application, a preparation method of the high-permeability heat transfer disperse dye ink is used to prepare the high-permeability heat transfer disperse dye ink according to any one of the above schemes. The preparation method comprises the following steps: preparation of a first disperse dye color paste: uniformly mixing and dispersing a first disperse dye microcapsule, a first dispersant, a bactericide and the balance of water, and then grinding, removing impurities and filtering to obtain a first disperse dye color paste; preparation of a second disperse dye color paste: uniformly mixing and dispersing a second disperse dye, a second dispersant, a bactericide and the balance of water, and then grinding, removing impurities and filtering to obtain a second disperse dye color paste; preparation of the ink: uniformly mixing and stirring the first disperse dye color paste, the second disperse dye color paste, an organic solvent, an additive and the balance of water, and then filtering to obtain the heat transfer disperse dye ink.
[0027] According to the above scheme, the ink preparation method is simple, and the prepared ink has good stability. DETAILED DESCRIPTION
[0028] The present application provides a high-permeability heat transfer disperse dye ink, which comprises 10-30% of the first disperse dye color paste, 10-25% of the second disperse dye color paste, 15-30% of an organic solvent, 0.5-5% of an additive and the balance of water by mass percentage.
[0029] The first disperse dye color paste comprises 25-30% of first disperse dye microcapsules, 35-45% of a first dispersant, 0.1-0.3% of a bactericide and the balance of water by mass percentage.
[0030] The first disperse dye capsule is formed by microcapsule coating technology. Preferably, the first disperse dye has a molecular weight of 280 to 350. Specifically, the first disperse dye can be selected from at least one of disperse blue 5, disperse blue 8, disperse blue 11, disperse blue 19, disperse blue 20, disperse blue 23, disperse blue 24, disperse blue 34, disperse blue 55, disperse blue 58, disperse blue 72, disperse blue 81, disperse blue 95, disperse blue 104, disperse blue 118, disperse blue 134, disperse blue 339, disperse blue 359, disperse blue 360, disperse blue 377, disperse red 2, disperse red 13, disperse red 19, disperse red 31, disperse red 41, disperse red 55, disperse red 59, disperse red 60, disperse red 70, disperse red 83, disperse red 98, disperse red 114, disperse yellow 6, disperse yellow 7, disperse yellow 33, disperse yellow 54, disperse yellow 68, disperse yellow 71, disperse yellow 100, disperse yellow 162, disperse yellow 180, disperse orange 23, disperse orange 25, disperse orange 36, disperse orange 121, disperse orange 138, and disperse orange 151.
[0031] The first disperse dye capsule can be prepared by the following preparation method:
[0032] Preparation of the dye dispersion liquid: the first disperse dye is added to the first solvent, and stirred until the first disperse dye is completely dissolved, and then the emulsifier is added and stirred uniformly to obtain the dye dispersion liquid; the first solvent is selected from at least one of acetone and ethanol, and the emulsifier is selected from at least one of polyacrylate and polyether polyol; preferably, the mass ratio of the first disperse dye to the emulsifier is 10:1, and 8g-10g of the first disperse dye is added per 100ml of the first solvent;
[0033] Dissolution of the wall material: the wall material is added to the second solvent, heated to 60-70°C, and stirred until the wall material is completely dissolved to obtain a wall material solution; the second solvent is selected from at least one of ethyl acetate and ethanol, and the wall material is selected from at least one of polylactic acid, gelatin or gum arabic; 15g-25g of the wall material is added per 100ml of the second solvent;
[0034] Mixing of the dye dispersion liquid and the wall material solution: the dye dispersion liquid is slowly added to the wall material solution, and after stirring uniformly, the pH adjuster is added to adjust the pH value to 5-6, and the stirring is continued until uniform to obtain a mixed solution; the volume of the first solvent in the dye dispersion liquid and the volume of the second solvent in the wall material solution are the same, and the pH adjuster is selected from at least one of citric acid, malic acid and acetic acid;
[0035] Homogenization treatment: the mixed solution is transferred to a homogenizer for homogenization treatment until the first disperse dye is uniformly dispersed in the wall material solution;
[0036] Spray drying treatment: the mixed solution after homogenization treatment is dried by spray drying equipment, the inlet air temperature is controlled at 120-140°C, the outlet air temperature is controlled at 80-90°C, and the dried powder is collected, to obtain the first disperse dye microcapsule.
[0037] The first dispersant is at least one selected from the group consisting of phenylpropyl resin solution, acrylate copolymer, styrene maleic anhydride copolymer, and specifically can be selected from BASF Joncryl 96MEA, BASF Joncryl 196MEA, BYK LP-C 22092 of Germany, SMA 1000H, SMA 2000H, SMA 17352H of SARTOMER of the United States.
[0038] The bactericide can be selected from BIT (1,2-benzisothiazole-3-ketone).
[0039] The second disperse dye color paste includes 30-40% of the second disperse dye, 20-25% of the second dispersant, 0.1-0.3% of the bactericide, and the balance of water in terms of mass percentage. Preferably, the molecular weight of the second disperse dye is 200-280, and in the present application, the molecular weight of the first disperse dye is greater than that of the second disperse dye. Specifically, the second disperse dye can be at least one selected from the group consisting of disperse blue 14, disperse blue 22, disperse blue 78, disperse blue 95, disperse blue 108, disperse red 3, disperse red 4, disperse red 9, disperse red 15, disperse red 63, disperse yellow 2, disperse yellow 4, disperse yellow 8, disperse yellow 13, disperse yellow 14, disperse yellow 16, disperse yellow 17 disperse yellow 26, disperse yellow 97, disperse orange 7, disperse orange 15, disperse orange 24, disperse violet 1, disperse violet 4, and disperse violet 15.
[0040] The second dispersant is at least one selected from the group consisting of phenylpropyl resin solution, acrylate copolymer, styrene maleic anhydride copolymer, and specifically can be selected from BASF Joncryl 96MEA, BASF Joncryl 196MEA, BYK LP-C 22092 of Germany, SMA 1000H, SMA 2000H, SMA 17352H of SARTOMER of the United States.
[0041] The bactericide can be selected from BIT (1,2-benzisothiazole-3-ketone).
[0042] The organic solvent is preferably a polyhydric alcohol, and more preferably glycerol and / or ethylene glycol.
[0043] The auxiliary agent includes at least one of a surfactant and a bactericide.
[0044] The surfactant is selected from non-ionic surfactants, and specifically can be selected from Surfynol 465, and the content of the surfactant is 1-2%.
[0045] The bactericide can be selected from BIT (1,2-benzisothiazolin-3-one), and the content of the bactericide is 0.1-0.3%.
[0046] The preparation method of the heat transfer printing disperse dye ink is as follows:
[0047] Preparation of the first disperse dye color paste: according to the mass percentage, the first disperse dye microcapsule, the first dispersant, the bactericide and the balance of water are uniformly mixed and dispersed, and then are ground, impurity-removed, filtered to obtain the first disperse dye color paste, and specifically, the grinding includes coarse grinding, impurity-removing, fine grinding and detecting processes, and the above operation processes are all the operation methods known to those skilled in the art.
[0048] Preparation of the second disperse dye color paste: according to the mass percentage, the second disperse dye, the second dispersant, the bactericide and the balance of water are uniformly mixed and dispersed, and then are ground, impurity-removed, filtered to obtain the second disperse dye color paste, and specifically, the grinding includes coarse grinding, impurity-removing, fine grinding and detecting processes, and the above operation processes are all the operation methods known to those skilled in the art.
[0049] Preparation of the ink: according to the mass percentage, the first disperse dye color paste, the second disperse dye color paste, the organic solvent, the auxiliary agent and the balance of water are uniformly mixed and stirred, and then are filtered to obtain the heat transfer printing disperse dye ink, and preferably, the filtering can be filtering through a filter membrane or filter core with a pore size of 0.5 μm.
[0050] The application will be described in detail below in combination with specific embodiments.
[0051] The first disperse dye color paste, the second disperse dye color paste and the common disperse dye color paste are respectively prepared according to the mass percentages in Tables 1-3 below.
[0052] Table 1
[0053]
[0054]
[0055] Table 2
[0056]
[0057] Table 3
[0058]
[0059]
[0060] The first disperse dye of the first disperse dye paste in Table 1 to Table 3 is prepared into microcapsules according to the following preparation method:
[0061] Preparation of dye dispersion: 10 g of the first disperse dye is added to 100 ml of the first solvent, and stirred until the first disperse dye is completely dissolved, followed by adding 1 g of emulsifier and stirring evenly to obtain a dye dispersion;
[0062] Dissolution of the wall material: Add 20 g of polylactic acid (PLA) to 100 ml of the second solvent, heat to 60°C to 70°C, and stir until the wall material is completely dissolved to obtain a PLA solution;
[0063] Mixing the dye dispersion and the wall material solution: slowly add the dye dispersion prepared above to the PLA solution prepared above, stir evenly, add citric acid to adjust the pH to 5-6, and continue stirring for 30-60 minutes until uniform, to obtain a mixed solution;
[0064] Homogenization treatment: transfer the mixed solution to a homogenizer and homogenize for 10 to 15 minutes until the first disperse dye is evenly dispersed in the wall material solution;
[0065] Spray drying treatment: The mixed solution after homogenization is dried by spray drying equipment, the inlet air temperature is controlled at 120°C to 140°C, and the outlet air temperature is controlled at 80°C to 90°C, and the dried powder is collected to obtain the first disperse dye microcapsules.
[0066] The second disperse dye pastes in Tables 1 to 3 were prepared according to the above-mentioned preparation scheme of the second disperse dye paste.
[0067] The common disperse dye pastes in Tables 1 to 3 were prepared according to the following preparation method:
[0068] The first disperse dye, the first dispersant, the fungicide and the balance of water are mixed and dispersed uniformly according to mass percentage, and then subjected to coarse grinding, impurity removal, fine grinding, testing and filtration to obtain a common disperse dye paste.
[0069] Thermal transfer disperse dye ink was prepared according to the mass percentages in Table 4 and Table 5 below.
[0070] Table 4
[0071]
[0072]
[0073] Table 5
[0074]
[0075]
[0076] The preparation method of the ink in Table 4 and Table 5 is as follows:
[0077] The first disperse dye colorant and / or the common disperse dye colorant and / or the second disperse dye colorant, the organic solvent, the auxiliary, and the balance of water are mixed and stirred uniformly according to the mass percentage, and then filtered through a filter membrane or filter core with a pore size of 0.5 μm to obtain the thermal transfer disperse dye ink.
[0078] The thermal transfer disperse ink in Table 4 and Table 5 is subjected to the following performance tests.
[0079] The process of the printing test on the fabric is as follows:
[0080] The thermal transfer disperse ink is printed on the commercially available Xianhe brand 35 g thermal transfer paper by the EPSON I3200 printhead printer, and then the color is transferred to the 100D elastic fabric by the thermal transfer process at 210°C for 20 seconds to obtain the semi-finished fabric with the printed pattern.
[0081] 1. Color penetration test
[0082] The color density of the same color selected point on the front and back of the semi-finished fabric is tested, and the result obtained by dividing the back color density value by the front color density value is greater than or equal to 80%, which is judged as A; the result obtained is greater than 60% and less than 80%, which is judged as B; the result obtained is less than 60%, which is judged as C. The test results are shown in Table 6.
[0083] 2. Color saturation test
[0084] The color density of the front of the semi-finished fabric is tested, and the color density is greater than 1.2, which is judged as A; the color density is 0.9-1.2, which is judged as B; the color density is less than 0.9, which is judged as C. The test results are shown in Table 6.
[0085] 3. Color uniformity test
[0086] The color density of the front of the semi-finished fabric is tested without stretching; after the length of the fabric is stretched by 1 times, the color density of the front of the stretched fabric is tested, and the result obtained by dividing the color density value after stretching by the color density value before stretching is greater than or equal to 70%, which is judged as A; the result obtained is greater than 50% and less than 70%, which is judged as B; the result obtained is less than 50%, which is judged as C. The test results are shown in Table 6.
[0087] Table 6
[0088]
[0089]
[0090] As can be seen from Table 6, the ink of the comparative example is not as good as the comparative example in color penetration, color saturation and color uniformity in varying degrees. The heat transfer printing dispersion ink of the present application separates the first dispersion dye and the second dispersion dye by using the capsule packaging technology, the first dispersion dye and the second dispersion dye are combined with the fabric fiber for different time, the second dispersion dye enters the fiber inside preferentially to realize rapid penetration; the first dispersion dye is in the form of microcapsule, in the heat transfer printing process, the packaging material of the microcapsule is dissolved by heat to release the first dispersion dye inside, and then the first dispersion dye is combined with the fabric fiber. The first dispersion dye is configured into microcapsule, the time difference of release is used to inhibit the competitive reaction between the dispersion dyes, the dyes can all react with the fiber, the color saturation is improved, the dyeing is uniform, and the penetration effect is good. The second dispersion dye has smaller molecular weight, and is easier to enter the fiber inside to realize rapid penetration, and the second dispersion dye has larger molecular weight, and is more suitable for surface dyeing to improve the color saturation.
[0091] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of various changes or replacements within the technical range disclosed by the present application, and these should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
Claims
1. A highly permeable thermal transfer disperse dye ink, characterized by: The thermal transfer disperse dye ink comprises a first disperse dye paste and a second disperse dye paste; The first disperse dye paste includes first disperse dye microcapsules, which are formed by processing the first disperse dye through microcapsule encapsulation technology; The second disperse dye paste includes a second disperse dye; The molecular weight of the first disperse dye is greater than the molecular weight of the second disperse dye.
2. The high-permeability thermal transfer disperse dye ink according to claim 1, wherein: The molecular weight of the first disperse dye in the first disperse dye microcapsule is 280 to 350; The molecular weight of the second disperse dye is 200 to 280.
3. A highly permeable thermal transfer disperse dye ink as claimed in claim 1 or 2, characterized in that: The first disperse dye paste further comprises 35% to 45% of a first dispersant by mass, wherein the first dispersant is selected from at least one of a styrene acrylic resin solution, an acrylate copolymer, and a styrene maleic anhydride copolymer; Calculated by mass percentage, the second disperse dye paste further comprises 30% to 40% of a second dispersant, and the second dispersant is selected from at least one of a styrene acrylic resin solution, an acrylate copolymer, and a styrene maleic anhydride copolymer.
4. A highly permeable thermal transfer disperse dye ink as claimed in claim 1 or 2, characterized in that: Calculated by mass percentage, the first disperse dye paste includes 25% to 30% of the first disperse dye microcapsules; Calculated by mass percentage, the second disperse dye paste includes 20% to 25% of the second disperse dye.
5. The high-permeability thermal transfer disperse dye ink according to claims 1 to 2, characterized in that: Calculated by mass percentage, the thermal transfer disperse dye ink includes 10% to 30% of the first disperse dye paste, 10% to 25% of the second disperse dye paste, 15% to 30% of an organic solvent, 0.5% to 5% of an auxiliary agent and the balance water.
6. A method for preparing disperse dye microcapsules, characterized in that: The preparation method is used to prepare the first disperse dye microcapsules in the thermal transfer high-permeability thermal transfer disperse dye ink according to any one of claims 1 to 5. The preparation method comprises the following steps: Preparation of dye dispersion: adding a first disperse dye to a first solvent, stirring until the first disperse dye is completely dissolved, then adding an emulsifier, stirring evenly, to obtain a dye dispersion; Dissolving the wall material: adding the wall material to the second solvent, heating to 60° C. to 70° C., and stirring until the wall material is completely dissolved to obtain a wall material solution; Mixing the dye dispersion and the wall material solution: slowly adding the dye dispersion to the wall material solution, stirring evenly, adding a pH adjuster to adjust the pH value to 5-6, and continuing to stir until uniform to obtain a mixed solution; Homogenization treatment: transferring the mixed solution to a homogenizer for homogenization treatment until the first disperse dye is evenly dispersed in the wall material solution; Spray drying treatment: The mixed solution after homogenization is dried by spray drying equipment, the inlet air temperature is controlled at 120°C to 140°C, and the outlet air temperature is controlled at 80°C to 90°C, and the dried powder is collected to obtain the first disperse dye microcapsules.
7. A method for preparing disperse dye microcapsules as claimed in claim 6, characterized in that: In the step of preparing the dye dispersion, the mass ratio of the first disperse dye to the emulsifier is 10:
1.
8. The method for preparing a disperse dye microcapsule as claimed in claim 6 or 7, wherein: The wall material is selected from at least one of polylactic acid, gelatin or gum arabic; The emulsifier is selected from at least one of polyacrylate and polyether polyol.
9. The method for preparing a disperse dye microcapsule as claimed in claim 6 or 7, wherein: The first solvent is selected from at least one of acetone and ethanol; The second solvent is selected from at least one of ethyl acetate and ethanol.
10. A method for preparing a high-permeability thermal transfer disperse dye ink, characterized in that: The preparation method is used to prepare a high-permeability thermal transfer disperse dye ink as claimed in any one of claims 1 to 5, and the preparation method comprises the following steps: Preparation of the first disperse dye paste: first disperse dye microcapsules, first dispersant, fungicide and balance water are mixed and dispersed uniformly according to mass percentage, and then ground, impurity-removed and filtered to obtain the first disperse dye paste; Preparation of the second disperse dye paste: the second disperse dye, the second dispersant, the fungicide and the balance of water are mixed and dispersed uniformly according to mass percentage, and then ground, impurity-removed and filtered to obtain the second disperse dye paste; Preparation of ink: According to mass percentage, the first disperse dye paste, the second disperse dye paste, an organic solvent, an auxiliary agent and the balance of water are mixed and stirred evenly, and then filtered to obtain the thermal transfer disperse dye ink.