CN116005472B - Water-soluble sublimation transfer printing ink and preparation method thereof - Google Patents
Water-soluble sublimation transfer printing ink and preparation method thereof Download PDFInfo
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- 238000002360 preparation method Methods 0.000 title claims abstract description 130
- 238000000859 sublimation Methods 0.000 title claims abstract description 37
- 230000008022 sublimation Effects 0.000 title claims abstract description 37
- 238000010023 transfer printing Methods 0.000 title claims abstract description 27
- 239000000986 disperse dye Substances 0.000 claims abstract description 138
- 238000007639 printing Methods 0.000 claims abstract description 131
- 239000002245 particle Substances 0.000 claims abstract description 89
- 239000002270 dispersing agent Substances 0.000 claims abstract description 85
- 238000000227 grinding Methods 0.000 claims abstract description 80
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims abstract description 72
- 239000007788 liquid Substances 0.000 claims abstract description 65
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 48
- 238000003756 stirring Methods 0.000 claims abstract description 45
- 230000002776 aggregation Effects 0.000 claims abstract description 33
- 239000000975 dye Substances 0.000 claims abstract description 23
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 claims abstract description 19
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims abstract description 19
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims abstract description 19
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 claims abstract description 19
- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000001914 filtration Methods 0.000 claims abstract description 11
- 238000002156 mixing Methods 0.000 claims abstract description 11
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 10
- 238000010008 shearing Methods 0.000 claims abstract description 8
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- 239000000203 mixture Substances 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 29
- 238000004220 aggregation Methods 0.000 claims description 28
- 239000011324 bead Substances 0.000 claims description 22
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 20
- 229910052726 zirconium Inorganic materials 0.000 claims description 20
- 238000001514 detection method Methods 0.000 claims description 18
- 230000008569 process Effects 0.000 claims description 16
- 238000003801 milling Methods 0.000 claims description 13
- 230000000052 comparative effect Effects 0.000 claims description 10
- 239000002904 solvent Substances 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 9
- 239000000126 substance Substances 0.000 claims description 8
- 238000007689 inspection Methods 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 229920005989 resin Polymers 0.000 claims description 5
- 239000011347 resin Substances 0.000 claims description 5
- 239000011230 binding agent Substances 0.000 claims description 3
- 238000005374 membrane filtration Methods 0.000 claims description 3
- 239000012982 microporous membrane Substances 0.000 claims description 3
- 150000003384 small molecules Chemical class 0.000 claims description 3
- 238000002791 soaking Methods 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- CLOMYZFHNHFSIQ-UHFFFAOYSA-N clonixin Chemical compound CC1=C(Cl)C=CC=C1NC1=NC=CC=C1C(O)=O CLOMYZFHNHFSIQ-UHFFFAOYSA-N 0.000 description 18
- 230000000694 effects Effects 0.000 description 6
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- ZXEKIIBDNHEJCQ-UHFFFAOYSA-N isobutanol Chemical compound CC(C)CO ZXEKIIBDNHEJCQ-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 4
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- 239000000080 wetting agent Substances 0.000 description 1
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- Inks, Pencil-Leads, Or Crayons (AREA)
Abstract
The invention relates to the technical field of thermal sublimation ink, in particular to water-soluble sublimation transfer printing ink and a preparation method thereof, wherein the ink comprises disperse dye, methanol, neopentyl glycol, hydroxypropyl methyl cellulose and water, and the preparation method comprises the following steps: step s1, adding dye dispersant and water into a stirring kettle, and stirring uniformly; step s2, adding the disperse dye, methanol, neopentyl glycol and hydroxypropyl methyl cellulose into a stirring kettle, shearing and stirring until the disperse dye, the methanol, the neopentyl glycol and the hydroxypropyl methyl cellulose are uniformly mixed, and injecting the mixture into a grinding machine for full grinding; step s3, adjusting the addition amount of the dye dispersant according to the particle size and the agglomeration amount of the disperse dye; step s4, filtering to obtain a filtered liquid and judging the particle size again to obtain a dye grinding mixed liquid; and step s5, uniformly mixing the dye grinding mixed liquid with methanol, water and other auxiliary agents according to the mixing ratio dosage to obtain the printing ink. The ink provided by the invention has good printing performance and good economical efficiency and practicability.
Description
Technical Field
The invention relates to the technical field of thermal sublimation ink, in particular to water-soluble sublimation transfer printing ink and a preparation method thereof.
Background
Sublimation thermal transfer printing refers to printing thermal sublimation transfer printing ink on paper (or plastic film) through printing, and then overlapping the paper (or film) printed with the image and text with fabric, heating and pressurizing, and sublimating and transferring the dye on the paper (or film) to the fabric in a gas phase state. The process of making thermal transfer printing paper is similar to the printing procedure, namely, the original manuscript such as characters, pictures and photos is subjected to the procedures of plate making, inking, pressurizing and the like, so that the sublimation thermal transfer printing ink is transferred onto the base paper in an offset printing (or gravure printing or silk screen printing) mode. The base paper for transfer printing should be selected from paper with high temperature resistance, high weight resistance, anti-bleeding, high surface smoothness, low dye gas permeability and high tensile force, such as copper plate paper, 80 g double offset paper, etc. The selection of sublimation thermal transfer ink is also a non-negligible work, and whether the transferred image is bright or not, and whether the friction resistance, the fastness and the adhesion are strongest or not plays a decisive role in the quality of the sublimation thermal transfer ink.
Chinese patent publication No.: CN107151480B discloses a preparation method of thermal sublimation ink based on disperse dye, which comprises the following steps: (a) Sequentially adding water, a dispersing agent, a solvent and a surfactant into a container, and carrying out shearing dispersion; adding disperse dye into the container continuously, stirring and dispersing to obtain a first mixture; (b) Grinding the first mixture by adopting zirconia beads with different particle sizes, wherein the particle sizes of the zirconia beads are changed from large to small; (c) Adding water with the same mass as the water in the product of the step (b), centrifuging to remove large particle residues, and filtering to obtain color paste; (d) The color paste, a wetting agent, a leveling agent, a solvent and water are prepared into the thermal sublimation ink. According to the technical scheme, the color of the sublimation ink is completely determined by the color of the initial disperse dye, in mass production, the color of each batch of disperse dye raw materials fluctuates to a certain extent, so that the ink prepared by using the disperse dye also has the problem of color fluctuation, however, the printing effect of the sublimation transfer ink is clear, so that although the color of the sublimation ink has little deviation, the color deviation still causes obvious printing color deviation for the mass products printed by using the sublimation ink with the color fluctuation, and the batch quality and the printing effect of the printed products are influenced.
Disclosure of Invention
Therefore, the invention provides the water-soluble sublimation transfer printing ink and the preparation method thereof, which are used for solving the problem of poor printing effect caused by printing color deviation after the preparation of the thermal sublimation ink in the prior art, and have smaller disperse dye particle size so as to achieve good printing effect.
In order to achieve the above object, according to one aspect of the present invention, there is provided a water-soluble sublimation transfer printing ink comprising a disperse dye, methanol, neopentyl glycol, hydroxypropyl methylcellulose and water; the purity of each component is industrial purity, and the binder of the ink adopts degradable resin with molecular weight smaller than that of small molecules.
On the other hand, the water-soluble sublimation transfer printing ink is prepared by the following preparation method, which comprises the following steps:
step s1, adding dye dispersant and water with preset dosage into a stirring kettle, and uniformly stirring;
step s2, adding the disperse dye with the pre-prepared amount and the pre-set amount of methanol, neopentyl glycol and hydroxypropyl methyl cellulose into a stirring kettle, shearing and stirring until the disperse dye and the pre-set amount of methanol, neopentyl glycol and hydroxypropyl methyl cellulose are uniformly mixed, and injecting the mixture into a grinding machine for full grinding;
step s3, periodically detecting the particle size and agglomeration condition of the disperse dye in the mixed liquid in the grinder and adjusting the adding amount of the dye dispersing agent according to the detected particle size and agglomeration amount of the disperse dye;
Step S4, sequentially carrying out centrifugal filtration and microporous membrane filtration on the ground mixed liquid to obtain filtered liquid, and carrying out particle size judgment on the filtered liquid again to obtain dye grinding mixed liquid;
and step s5, uniformly mixing the dye grinding mixed liquid with methanol, water and other auxiliary agents according to the mixing ratio dosage to obtain the printing ink.
The proportion of each component in the ink can be specifically set according to the solubility and density of specific components, the invention is not specifically limited, and for convenience of description, the proportion of disperse dye, methanol, neopentyl glycol, hydroxypropyl methylcellulose and water in the components of the ink is set as the disperse dye: methanol: neopentyl glycol: hydroxypropyl methylcellulose: water = x: y: and z: w: h, the pre-prepared ink mass M0 is set to m0= (x+y+z+w+h) ×m0, where M0 is one unit mass.
Further, in the preparation method, the preparation process of the ink is performed in a closed and ventilated space, and a filtering device is arranged in an exhaust passage of a ventilation pipeline in the space to filter gas components emitted in the preparation process of the ink sample.
Further, in the step s1, the ink preparation system is provided with a preset dispersant addition coefficient xa0 and a preset water addition coefficient xb0, wherein xa0 > 0 and xb0 > 0, the xa0 and xb0 are used for determining a preset mass M0, calculating a mass ma of the dye dispersant and a mass mb of water which are pre-fed into the stirring kettle, and setting ma=xa0×m0, and mb=xb0×m0.
Further, in step s2, the grinding machine sequentially adopts a plurality of zirconium beads with gradually decreasing sizes to grind the injected mixed liquid, and the ink preparation system sets the grinding times of the grinding machine, the diameter of the zirconium beads corresponding to each grinding, the rotating speed of the grinding machine and the grinding time according to the particle size standard of the required ink.
Further, in the step s3, the ink preparation system periodically collects the disperse dye particles in the mixed liquid in the grinder to perform particle size detection and aggregation quantity detection, and judges whether the addition amount of the dispersing agent of the disperse dye meets the standard according to the aggregation condition of the disperse dye particles in the mixed liquid in the grinder, the ink preparation system is provided with an aggregation quantity standard K0, wherein K0 is more than 0, the ink preparation system records the aggregation quantity of the disperse dye particles in the collected mixed liquid sample as K, and determines whether the addition amount of the dispersing agent of the disperse dye meets the standard according to K;
When K is less than or equal to K0, the ink preparation system judges that the addition amount of the dispersing agent meets the standard;
when K > K0, the ink preparation system determines that the addition amount of the dispersant does not meet the standard and adds the addition amount of the dispersant to the mixed liquid.
Further, in the step s3, when the ink preparation system determines that the addition amount of the dispersant does not meet the criterion, the ink preparation system determines the addition amount of the dispersant based on the detected aggregation number K of the disperse dye particles, the ink preparation system is provided with a first preset aggregation number criterion K1, a second preset aggregation number criterion K2, a first preset dispersant addition coefficient β1, a second preset dispersant addition coefficient β2, and a third preset dispersant addition coefficient β3, wherein K0 < K1 < K2, β1 < β2 < β3,
when K is smaller than K1, the ink preparation system adopts a first preset dispersant addition coefficient beta 1 to adjust the addition amount of the dispersant;
when K1 is less than or equal to K2, the ink preparation system adopts a second preset dispersant addition coefficient beta 2 to adjust the addition amount of the dispersant;
when K is more than K2, the ink preparation system adopts a third preset dispersant addition coefficient beta 3 to adjust the addition amount of the dispersant;
When the ink preparation system adjusts the addition amount of the dispersant by adopting an ith preset dispersant addition coefficient betai, wherein i=1, 2 and 3, the adjusted addition amount of the dispersant is denoted as ma ', and ma' =ma×k×betai/K0 is set, wherein ma is the addition amount of the dispersant in the mixed liquid before adjustment.
Further, in the step s3, the ink preparation system collects the disperse dye particles in the mixed liquid in the grinder to perform particle size detection and aggregation number detection and judges whether the grinding of the disperse dye meets the standard according to the particle size of the disperse dye particles in the mixed liquid in the grinder, the ink preparation system is provided with a particle size diameter standard R0, wherein R0 is more than 0, the ink preparation system detects the average particle size diameter R of the disperse dye particles in the mixed liquid sample and determines whether the grinding of the disperse dye meets the standard according to R,
when R is less than or equal to R0, the ink preparation system judges that the grinding of the disperse dye meets the standard;
when R > R0, the ink preparation system determines that the milling of the disperse dye is not in compliance with the standard and adjusts the milling time or increases the number of zirconium beads to bring the milling of the disperse dye into compliance with the standard.
Further, in the step s3, the ink preparation system determines an adjustment manner of a grinding process of the disperse dye according to a maximum particle diameter Rmax of the disperse dye particles in the mixed liquid sample so that grinding of the disperse dye meets a standard, is provided with a first particle diameter judgment difference standard Δr1, a second particle diameter judgment standard Δr2 and a preset maximum particle diameter standard Rmax, wherein 0 < Δr1 < Δr2, and the ink preparation system determines an adjustment manner of grinding of the disperse dye according to a difference Δr between Rmax and Rmax, sets Δr=rmax-Rmax,
When DeltaR > DeltaR 2, the ink preparation system judges that the particle size of the disperse dye in the mixed liquid is too large and adjusts the grinding process in a mode of increasing the grinding time and increasing the number of zirconium beads;
when DeltaR 1 is less than or equal to DeltaR 2, the ink preparation system judges that the particle size of the disperse dye in the mixed liquid is larger, and adjusts the grinding process in a mode of increasing the number of zirconium beads;
when DeltaR is smaller than DeltaR 1, the ink preparation system judges that the particle size of the disperse dye in the mixed liquid is smaller and adjusts the grinding process in a mode of increasing the grinding time;
when the ink preparation system adjusts the grinding process in a mode of increasing the grinding time, the ink preparation system marks the adjusted grinding time as T ', and sets T' =t× (Rmax-Rmax)/Rf, wherein T is a preset standard value of the grinding time, and Rf is a preset adjustment parameter.
When the ink preparation system adjusts the grinding process in a manner of increasing the number of zirconium beads, the ink preparation system marks the adjusted number of zirconium beads as S ', and sets S' =s× (Rmax-Rmax)/rf+s, where S is the number of zirconium beads before adjustment, and Rf is a preset adjustment parameter.
Further, before preparing the water-soluble sublimation transfer printing ink, the method further comprises: step s0, preparing an ink sample in advance according to an ink preparation ratio, and performing color inspection, color fastness inspection and harmful substance residue analysis to judge whether the ink printing sample is qualified, and if so, performing batch ink preparation, wherein the step comprises the following steps:
step s01, preparing disperse dye samples, determining disperse dye batches used for preparing dosages, the mass of the disperse dyes in each batch and the mass ratio of the disperse dyes in each batch, and weighing the disperse dye samples from the disperse dyes in each batch according to the mass ratio of the disperse dyes determined in the above steps;
step s02, preparing an ink sample, namely sequentially shearing and stirring the disperse dye sample, methanol, neopentyl glycol, hydroxypropyl methyl cellulose, water, a dispersing agent and an auxiliary agent according to preparation process parameters, grinding, filtering, and mixing with a solvent and the auxiliary agent to prepare the ink sample;
step s03, printing a plurality of ink printing samples by using the prepared ink samples, and washing and drying a plurality of the ink printing samples at high temperature to prepare comparison printing samples;
step s04, performing color analysis, color fastness detection and harmful substance residue analysis determination on the ink printing sample and the comparison printing sample;
And step s05, preparing and weighing the disperse dye and other ink components according to the determined mass ratio of the disperse dye to prepare the ink in batches.
Further, in the step s03, the step of preparing the comparative print sample includes:
step s031, placing the ink printed sample and a set dose of hot water in a stirring barrel for soaking for 30 minutes, wherein the temperature of the hot water is set to 120 ℃, and the purity of the hot water is analytically pure;
step s032, stirring the soaked ink printing sample in a stirring barrel for 1 hour, setting the stirring rotation speed of the stirring barrel to 1400 revolutions per minute, and switching the stirring forward and reverse rotation for 10 seconds/time;
and s033, collecting the stirred water solution for stirring after stirring to analyze ink residual substances, and sequentially spin-drying and drying the stirred ink printing sample to obtain the comparative printing sample.
Further, in the step s04, the ink preparation system detects color values of the ink printing sample and the comparative printing sample by using a color difference detector to determine whether the ink printing sample and the comparative printing sample meet an ink printing color standard, wherein a first ink printing red-green standard A1, a second ink printing red-green standard A2, a first ink printing yellow-blue standard B1, a second ink printing yellow-blue standard B2, a first ink printing brightness standard L1 and a second ink printing brightness standard L2 are preset in the color difference detector, wherein A1 is less than A2, B1 is less than B2, L1 is more than or equal to 0 and less than or equal to L2 is less than or equal to 100, the color value of an ith ink printing sample in the ink printing samples detected by a color difference detector is recorded as (ai, bi, li), the color values of a plurality of detected ink printing samples are respectively counted and calculated to obtain average color values which are recorded as (ap, bp, lp), ap= (a1+ … … +ai)/i, bp= (b1+ … … +bi)/i, lp= (l1+ … … +li)/i are set,
When A1 is more than or equal to ap and less than or equal to A2, B1 is more than or equal to bp and less than or equal to B2, and L1 is more than or equal to lp and less than or equal to L2, the color difference detector preliminarily judges that the ink printing sample meets the color standard;
when ap < A1 or ap > A2 or bp < B1 or bp > B2 or lp < L1 or lp > L2, the color difference detector determines that the ink printed sample does not meet the color standard.
The color standard and the color space adopted by the adopted color difference detector are Lab color space, lab color space is the most current color space at present and can represent any color, wherein 'L' represents brightness of an object, 0-100 represents black to white, a 'represents red and green of the object, a positive value represents red, a negative value represents green, b' represents yellow and blue of the object, a positive value represents yellow and a negative value represents blue, and a detection light angle of the color difference detector can be set according to specific requirements.
Further, in the step s04, the ink preparation system is provided with an ink standard printing red-green standard A0, an ink standard printing yellow-blue standard B0, an ink standard printing brightness standard L0, an ink printing red-green color difference value standard DeltaA 0, an ink printing yellow-blue color difference value standard DeltaB 0 and an ink printing brightness difference value standard DeltaL 0, wherein A1 < A0 < A2, B1 < B0 < B2,0 < L2 < 100, deltaA 0 > 0, deltaB 0 > 0, deltaL 0 > 0, and when the color difference detector preliminarily determines that the ink printing sample meets the color standard, the ink preparation system determines whether the ink printing sample meets the color standard or not according to the calculated average color value (Deltaap, deltabp, deltalp) of a standard printing standard, setting DeltaDeltaA 0-DeltaAb, deltabp-DeltaAb-DeltaAlp,
When Δap is less than or equal to Δa0 and Δbp is less than or equal to Δb0 and Δlp is less than or equal to Δl0, the ink preparation system determines that the ink print sample meets a color standard;
when Δap > Δa0 or Δbp > Δb0 or Δlp > Δl0, the ink preparation system determines that the ink print sample does not meet the color standard and performs color adjustment on the disperse dye according to the average color value (ap, bp, lp) of the ink print sample, and the ink preparation system prepares the ink print sample again from the color-adjusted disperse dye and performs color determination until the ink print sample meets the color standard.
Compared with the prior art, the ink has the beneficial effects that the components of the ink adopt the biodegradable resin as the connecting material, the ink prepared by taking water as the main solvent can be mixed with water according to any proportion, firstly, a large amount of water is used in the solvent to reduce the preparation cost, and the ink can be compatible with condensed water on a pattern roll when the ink is used for printing, so that the problem of dry ink blocking a screen is effectively avoided, and meanwhile, residual stains on preparation equipment in the preparation process can be cleaned and removed by using water, so that the ink has good economical efficiency and practicability.
Furthermore, the components of the ink adopt methanol to replace solvents such as isobutanol commonly used in the traditional sublimation ink and small molecular resin to be used as a connecting material, so that the problem that strong pungent smell in the isobutanol is uncomfortable to the smell of a printed matter and a preparation environment in the preparation process is avoided, and the small molecular resin of the connecting material has the characteristics of low viscosity and strong adhesive force.
Furthermore, in the preparation method of the ink, the particle size of the disperse dye in the mixed liquid in the grinding machine is detected, so that the particle size of the disperse dye particles ground by the grinding machine is effectively ensured to meet the design requirement, the ink provided by the invention is effectively ensured to have uniform particle size, the printing fineness of a printed matter printed by the ink is improved, and the printing effect and quality of the ink can be further effectively improved.
Furthermore, in the preparation method of the ink, the aggregation quantity of the disperse dye in the mixed liquid in the grinding machine is detected to adjust the addition quantity of the dispersing agent, so that the good matching degree between the addition quantity of the dispersing agent in the ink and the disperse dye is effectively ensured, the stability of the particle size of the dye in the ink liquid is improved, the re-aggregation of the grinded disperse dye particles is avoided, and the influence of excessive dispersing agent on the printing film forming performance of the ink can be avoided by accurately controlling the addition quantity of the dispersing agent, so that the printing performance of the ink is further improved.
Furthermore, in the preparation method of the ink, the ink sample is prepared in advance and the color is checked and judged, so that the influence of the color deviation of the disperse dye on the quality of the ink is avoided, the cost waste caused by the color deviation of the batch ink prepared at one time is avoided, and the printing performance of the ink is further effectively improved.
Furthermore, the preparation process of the printing ink disclosed by the invention is ventilated to the preparation environment and provided with the filtering device, so that the preparation process of the printing ink disclosed by the invention is effectively ensured to be in accordance with the safety standard, and the printing ink has the characteristics of environmental protection.
Drawings
FIG. 1 is a schematic diagram of the components of a water-soluble sublimation transfer printing ink of the invention;
FIG. 2 is a step diagram of a method for preparing water-soluble sublimation transfer printing ink of the invention.
Detailed Description
In order that the objects and advantages of the invention will become more apparent, the invention will be further described with reference to the following examples; it should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that, in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
Referring to fig. 1, which is a schematic diagram of components of a water-soluble sublimation transfer printing ink according to the present invention, in one aspect, the present invention provides a water-soluble sublimation transfer printing ink, which comprises a disperse dye, methanol, neopentyl glycol, hydroxypropyl methylcellulose and water;
Specifically, the purity of each component of the ink is industrial purity, and the binder of the ink adopts degradable resin with molecular weight smaller than that of small molecules;
referring to fig. 2, which is a step diagram of a preparation method of the water-soluble sublimation transfer printing ink, the water-soluble sublimation transfer printing ink is prepared by adopting the following preparation method, and the method comprises the following steps:
step s1, adding dye dispersant and water with preset dosage into a stirring kettle, and uniformly stirring;
step s2, adding the disperse dye with the pre-prepared amount and the pre-set amount of methanol, neopentyl glycol and hydroxypropyl methyl cellulose into a stirring kettle, shearing and stirring until the disperse dye and the pre-set amount of methanol, neopentyl glycol and hydroxypropyl methyl cellulose are uniformly mixed, and injecting the mixture into a grinding machine for full grinding;
step s3, periodically detecting the particle size and agglomeration condition of the disperse dye in the mixed liquid in the grinder and adjusting the adding amount of the dye dispersing agent according to the detected particle size and agglomeration amount of the disperse dye;
step S4, sequentially carrying out centrifugal filtration and microporous membrane filtration on the ground mixed liquid to obtain filtered liquid, and carrying out particle size judgment on the filtered liquid again to obtain dye grinding mixed liquid;
and step s5, uniformly mixing the dye grinding mixed liquid with methanol, water and other auxiliary agents according to the mixing ratio dosage to obtain the printing ink.
The proportion of each component in the ink can be specifically set according to the solubility and density of specific components, the invention is not specifically limited, and for convenience of description, the proportion of disperse dye, methanol, neopentyl glycol, hydroxypropyl methylcellulose and water in the components of the ink is set as the disperse dye: methanol: neopentyl glycol: hydroxypropyl methylcellulose: water = x: y: and z: w: h, the pre-prepared ink mass M0 is set to m0= (x+y+z+w+h) ×m0, where M0 is one unit mass.
The ink is prepared from biodegradable resin serving as a connecting material and water serving as a main solvent, and can be mixed with water according to any proportion, so that the preparation cost is reduced by using a large amount of water in the solvent.
Specifically, in the preparation method, the preparation process of the ink is performed in a closed and ventilated space, and a filtering device is arranged in an exhaust passage of a ventilation pipeline in the space to filter gas components emitted in the preparation process of the ink sample.
With continued reference to fig. 2, in step s1, the ink preparation system is provided with a preset dispersant addition coefficient xa0 and a preset water addition coefficient xb0, where xa0 > 0, xb0 > 0, where xa0 and xb0 are used to determine the mass of the dye dispersant and the mass of water that are pre-fed into the stirred tank, and calculates the mass ma of the dye dispersant and the mass mb of water that are pre-fed into the stirred tank according to the mass M0 of the pre-prepared ink, where ma=xa0×m0, mb=xb0×m0 is set.
Referring to fig. 2, in step s2, the grinding machine sequentially adopts a plurality of zirconium beads with gradually decreasing sizes to grind the injected mixed liquid, and the ink preparation system sets the grinding times of the grinding machine, the diameter of the zirconium beads corresponding to each grinding, the rotating speed of the grinding machine and the grinding time according to the particle size standard of the required ink.
It will be understood by those skilled in the art that the following settings for the various detection data criteria for the ink are set according to the specific number of times the mill is set, and the diameter of the zirconium beads, the rotational speed of the mill, and the milling time corresponding to each milling, and are adaptively adjusted according to the specific mill, and no specific numerical values are set herein.
With continued reference to fig. 2, in step s3, the ink preparation system periodically collects the disperse dye particles in the mixed liquid in the grinder, performs particle size detection and aggregation quantity detection, and determines whether the addition amount of the dispersing agent of the disperse dye meets the standard according to the aggregation condition of the disperse dye particles in the mixed liquid in the grinder, the ink preparation system is provided with an aggregation quantity standard K0, wherein K0 is greater than 0, and the ink preparation system marks the aggregation quantity of the disperse dye particles in the collected mixed liquid sample as K and determines whether the addition amount of the dispersing agent of the disperse dye meets the standard according to K;
when K is less than or equal to K0, the ink preparation system judges that the addition amount of the dispersing agent meets the standard;
when K > K0, the ink preparation system determines that the addition amount of the dispersant does not meet the standard and adds the addition amount of the dispersant to the mixed liquid.
Specifically, in the step s3, when the ink preparation system determines that the addition amount of the dispersant does not meet the criterion, the ink preparation system determines the addition amount of the dispersant based on the detected aggregation number K of the disperse dye particles, the ink preparation system is provided with a first preset aggregation number criterion K1, a second preset aggregation number criterion K2, a first preset dispersant addition coefficient β1, a second preset dispersant addition coefficient β2, and a third preset dispersant addition coefficient β3, wherein K0 < K1 < K2, β1 < β2 < β3,
When K is smaller than K1, the ink preparation system adopts a first preset dispersant addition coefficient beta 1 to adjust the addition amount of the dispersant;
when K1 is less than or equal to K2, the ink preparation system adopts a second preset dispersant addition coefficient beta 2 to adjust the addition amount of the dispersant;
when K is more than K2, the ink preparation system adopts a third preset dispersant addition coefficient beta 3 to adjust the addition amount of the dispersant;
when the ink preparation system adjusts the addition amount of the dispersant by adopting an ith preset dispersant addition coefficient betai, wherein i=1, 2 and 3, the adjusted addition amount of the dispersant is denoted as ma ', and ma' =ma×k×betai/K0 is set, wherein ma is the addition amount of the dispersant in the mixed liquid before adjustment.
According to the preparation method of the ink, the aggregation quantity of the disperse dye in the mixed liquid in the grinding machine is detected to adjust the addition quantity of the dispersing agent, so that the good matching degree between the addition quantity of the dispersing agent in the ink and the disperse dye is effectively ensured, the stability of the particle size of the dye in the ink liquid is improved, the re-aggregation of the grinded disperse dye particles is avoided, and the influence of excessive dispersing agent on the printing film forming performance of the ink can be avoided by accurately controlling the addition quantity of the dispersing agent, so that the printing performance of the ink is further improved.
Specifically, in the step s3, the ink preparation system collects the disperse dye particles in the mixed liquid in the grinder to perform particle size detection and aggregation number detection and judges whether the grinding of the disperse dye meets the standard according to the particle size of the disperse dye particles in the mixed liquid in the grinder, the ink preparation system is provided with a particle size diameter standard R0, wherein R0 is more than 0, the ink preparation system detects the average particle size diameter R of the disperse dye particles in the mixed liquid sample and determines whether the grinding of the disperse dye meets the standard according to R,
when R is less than or equal to R0, the ink preparation system judges that the grinding of the disperse dye meets the standard;
when R > R0, the ink preparation system determines that the milling of the disperse dye is not in compliance with the standard and adjusts the milling time or increases the number of zirconium beads to bring the milling of the disperse dye into compliance with the standard.
Specifically, in the step s3, the ink preparation system determines the adjustment of the grinding process of the disperse dye according to the maximum particle diameter Rmax of the disperse dye particles in the mixed liquid sample so that the grinding of the disperse dye meets the standard, is provided with a first particle diameter judgment difference standard DeltaR 1, a second particle diameter judgment standard DeltaR 2 and a preset maximum particle diameter standard Rmax, wherein DeltaR 1 is more than 0 and less than DeltaR 2, determines the adjustment of the grinding of the disperse dye according to the difference DeltaR between Rmax and Rmax, sets DeltaR=rmax-Rmax,
When DeltaR > DeltaR 2, the ink preparation system judges that the particle size of the disperse dye in the mixed liquid is too large and adjusts the grinding process in a mode of increasing the grinding time and increasing the number of zirconium beads;
when DeltaR 1 is less than or equal to DeltaR 2, the ink preparation system judges that the particle size of the disperse dye in the mixed liquid is larger, and adjusts the grinding process in a mode of increasing the number of zirconium beads;
when DeltaR is smaller than DeltaR 1, the ink preparation system judges that the particle size of the disperse dye in the mixed liquid is smaller and adjusts the grinding process in a mode of increasing the grinding time;
when the ink preparation system adjusts the grinding process in a mode of increasing the grinding time, the ink preparation system marks the adjusted grinding time as T ', and sets T' =t× (Rmax-Rmax)/Rf, wherein T is a preset standard value of the grinding time, and Rf is a preset adjustment parameter.
When the ink preparation system adjusts the grinding process in a manner of increasing the number of zirconium beads, the ink preparation system marks the adjusted number of zirconium beads as S ', and sets S' =s× (Rmax-Rmax)/rf+s, where S is the number of zirconium beads before adjustment, and Rf is a preset adjustment parameter.
According to the preparation method of the ink, the particle size of the disperse dye in the mixed liquid in the grinding machine is detected, so that the particle size of the disperse dye particles after grinding by the grinding machine is effectively ensured to meet the design requirement, the ink is effectively ensured to have uniform particle size, the printing fineness of a printed matter printed by the ink is improved, and the printing effect and quality of the ink can be further effectively improved.
Specifically, before preparing the water-soluble sublimation transfer printing ink, the method further comprises the following steps: step s0, preparing an ink sample in advance according to an ink preparation ratio, and performing color inspection, color fastness inspection and harmful substance residue analysis to judge whether the ink printing sample is qualified, and if so, performing batch ink preparation, wherein the step comprises the following steps:
step s01, preparing disperse dye samples, determining disperse dye batches used for preparing dosages, the mass of the disperse dyes in each batch and the mass ratio of the disperse dyes in each batch, and weighing the disperse dye samples from the disperse dyes in each batch according to the mass ratio of the disperse dyes determined in the above steps;
step s02, preparing an ink sample, namely sequentially shearing and stirring the disperse dye sample, methanol, neopentyl glycol, hydroxypropyl methyl cellulose, water, a dispersing agent and an auxiliary agent according to preparation process parameters, grinding, filtering, and mixing with a solvent and the auxiliary agent to prepare the ink sample;
Step s03, printing a plurality of ink printing samples by using the prepared ink samples, and washing and drying a plurality of the ink printing samples at high temperature to prepare comparison printing samples;
step s04, performing color analysis, color fastness detection and harmful substance residue analysis determination on the ink printing sample and the comparison printing sample;
and step s05, preparing and weighing the disperse dye and other ink components according to the determined mass ratio of the disperse dye to prepare the ink in batches.
Specifically, in the step s03, the step of preparing the comparative print sample includes:
step s031, placing the ink printing sample and a set dose of hot water in a stirring barrel for soaking for 30 minutes, wherein the temperature of the hot water is set to 120 ℃, and the purity of the hot water is analytically pure;
step s032, stirring the soaked ink printing sample in a stirring barrel for 1 hour, setting the stirring rotation speed of the stirring barrel to 1400 revolutions per minute, and switching the stirring forward and reverse rotation for 10 seconds/time;
and s033, collecting the stirred water solution for stirring after stirring to analyze ink residual substances, and sequentially spin-drying and drying the stirred ink printing sample to obtain the comparative printing sample.
Specifically, in the step s04, the ink preparation system detects color values of the ink printing sample and the comparative printing sample by using a color difference detector to determine whether the ink printing sample and the comparative printing sample meet an ink printing color standard, wherein a first ink printing red-green standard A1, a second ink printing red-green standard A2, a first ink printing yellow-blue standard B1, a second ink printing yellow-blue standard B2, a first ink printing brightness standard L1 and a second ink printing brightness standard L2 are preset in the color difference detector, wherein A1 is less than A2, B1 is less than B2, L1 is more than or equal to 0 and less than or equal to L2 is less than or equal to 100, the color value of an ith ink printing sample in the ink printing samples detected by a color difference detector is recorded as (ai, bi, li), the color values of a plurality of detected ink printing samples are respectively counted and calculated to obtain average color values which are recorded as (ap, bp, lp), ap= (a1+ … … +ai)/i, bp= (b1+ … … +bi)/i, lp= (l1+ … … +li)/i are set,
when A1 is more than or equal to ap and less than or equal to A2, B1 is more than or equal to bp and less than or equal to B2, and L1 is more than or equal to lp and less than or equal to L2, the color difference detector preliminarily judges that the ink printing sample meets the color standard;
when ap < A1 or ap > A2 or bp < B1 or bp > B2 or lp < L1 or lp > L2, the color difference detector determines that the ink printed sample does not meet the color standard.
The color standard and the color space adopted by the adopted color difference detector are Lab color space, lab color space is the most current color space at present and can represent any color, wherein 'L' represents brightness of an object, 0-100 represents black to white, a 'represents red and green of the object, a positive value represents red, a negative value represents green, b' represents yellow and blue of the object, a positive value represents yellow and a negative value represents blue, and a detection light angle of the color difference detector can be set according to specific requirements.
Specifically, in the step s04, the ink preparation system is provided with an ink standard printing red-green standard A0, an ink standard printing yellow-blue standard B0, an ink standard printing brightness standard L0, an ink printing red-green color difference value standard DeltaA 0, an ink printing yellow-blue color difference value standard DeltaB 0 and an ink printing brightness difference value standard DeltaL 0, wherein A1 < A0 < A2, B1 < B0 < B2,0 < L2 < 100, deltaA 0 > 0, deltaB 0 > 0, deltaL 0 > 0, when the color difference detector preliminarily judges that the ink printing sample meets the color standard, the ink preparation system determines whether the ink printing sample meets the color standard according to the calculated average color value (Deltaap, deltabp, deltalp) of a plurality of ink printing samples, setting DeltaaA0-Deltabp, deltabp-DeltaAlp,
When Δap is less than or equal to Δa0 and Δbp is less than or equal to Δb0 and Δlp is less than or equal to Δl0, the ink preparation system determines that the ink print sample meets a color standard;
when Δap > Δa0 or Δbp > Δb0 or Δlp > Δl0, the ink preparation system determines that the ink print sample does not meet the color standard and performs color adjustment on the disperse dye according to the average color value (ap, bp, lp) of the ink print sample, and the ink preparation system prepares the ink print sample again from the color-adjusted disperse dye and performs color determination until the ink print sample meets the color standard.
According to the preparation method of the ink, the ink sample is prepared in advance, and the color inspection and judgment are carried out, so that the influence of the color deviation of the disperse dye on the quality of the ink is avoided, the cost waste caused by the color deviation of the batch ink prepared at one time is avoided, and the printing performance of the ink is further effectively improved.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will be within the scope of the present invention.
The foregoing description is only of the preferred embodiments of the invention and is not intended to limit the invention; various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A method for preparing water-soluble sublimation transfer printing ink, which is characterized by comprising the following steps:
step s1, adding dye dispersant and water with preset dosage into a stirring kettle, and uniformly stirring;
step s2, adding the disperse dye with the pre-prepared amount and the pre-set amount of methanol, neopentyl glycol and hydroxypropyl methyl cellulose into a stirring kettle, shearing and stirring until the disperse dye and the pre-set amount of methanol, neopentyl glycol and hydroxypropyl methyl cellulose are uniformly mixed, and injecting the mixture into a grinding machine for full grinding;
step s3, periodically detecting the particle size and agglomeration condition of the disperse dye in the mixed liquid in the grinder and adjusting the adding amount of the dye dispersing agent according to the detected particle size and agglomeration amount of the disperse dye;
step S4, sequentially carrying out centrifugal filtration and microporous membrane filtration on the ground mixed liquid to obtain filtered liquid, and carrying out particle size judgment on the filtered liquid again to obtain dye grinding mixed liquid;
Step 5, uniformly mixing the dye grinding mixed liquid with methanol, water and other auxiliary agents according to a mixing ratio dosage to obtain the printing ink;
in the step s3, an ink preparation system collects the disperse dye particles in the mixed liquid in the grinder for particle size detection and aggregation quantity detection and judges whether the grinding of the disperse dye meets the standard according to the particle size of the disperse dye particles in the mixed liquid in the grinder, the ink preparation system is provided with a particle size diameter standard R0, wherein R0 is more than 0, the ink preparation system detects the average particle size diameter R of the disperse dye particles in the mixed liquid sample and determines whether the grinding of the disperse dye meets the standard according to R,
when R is less than or equal to R0, the ink preparation system judges that the grinding of the disperse dye meets the standard;
when R > R0, the ink preparation system determines that the milling of the disperse dye is not in accordance with the standard and adjusts the milling time or increases the number of zirconium beads so that the milling of the disperse dye is in accordance with the standard;
in the step s3, the ink preparation system determines an adjustment mode of a grinding process of the disperse dye according to a maximum particle diameter Rmax of the disperse dye particles in the mixed liquid sample so that grinding of the disperse dye meets the standard, is provided with a first particle diameter judgment difference standard R1, a second particle diameter judgment standard R2 and a preset maximum particle diameter standard Rmax, wherein 0 < <R2, the ink preparation system determines an adjustment mode of grinding of the disperse dye according to a difference R between Rmax and Rmax, R=rmax-Rmax is set,
When R > is R2, the ink preparation system judges that the particle size of the disperse dye in the mixed liquid is too large and adjusts the grinding process in a mode of increasing the grinding time and increasing the number of zirconium beads;
when the fatting R1 is less than or equal to the fatting R2, the ink preparation system judges that the particle size of the disperse dye in the mixed liquid is larger and adjusts the grinding process in a mode of increasing the number of zirconium beads;
when R < R1, the ink preparation system determines that the particle size of the disperse dye in the mixed liquid is small and adjusts the milling process in such a way as to increase the milling time.
2. The method of preparing a water-soluble sublimation transfer printing ink according to claim 1, further comprising, before preparing the water-soluble sublimation transfer printing ink: step s0, preparing an ink sample in advance according to the ink preparation proportion, and performing color inspection and judgment, wherein after the color of the ink sample is judged to be qualified, the ink is prepared according to the determined proportion;
the step s0 includes:
step s01, preparing disperse dye samples, determining disperse dye batches used for preparing dosages, the mass of the disperse dyes in each batch and the mass ratio of the disperse dyes in each batch, and weighing the disperse dye samples from the disperse dyes in each batch according to the mass ratio of the disperse dyes determined in the above steps;
Step s02, preparing an ink sample, namely sequentially shearing and stirring the disperse dye sample, methanol, neopentyl glycol, hydroxypropyl methyl cellulose, water, a dispersing agent and an auxiliary agent according to preparation process parameters, grinding, filtering, and mixing with a solvent and the auxiliary agent to prepare the ink sample;
step s03, printing a plurality of ink printing samples by using the prepared ink samples, and washing and drying a plurality of the ink printing samples at high temperature to prepare comparison printing samples;
step s04, performing color analysis, color fastness detection and harmful substance residue analysis determination on the ink printing sample and the comparison printing sample;
and step s05, preparing and weighing the disperse dye and other ink components according to the determined mass ratio of the disperse dye to prepare the ink in batches.
3. The method for preparing water-soluble sublimation transfer printing ink according to claim 2, wherein in the step s3, an ink preparation system periodically collects the disperse dye particles in the mixed liquid in the grinder to perform particle size detection and aggregation number detection and judges whether the addition amount of the dispersing agent of the disperse dye meets the standard according to the aggregation condition of the disperse dye particles in the mixed liquid in the grinder, the ink preparation system is provided with aggregation number standard K0, wherein K0 > 0, the ink preparation system marks the aggregation number of the disperse dye particles in the collected mixed liquid sample as K and determines whether the addition amount of the dispersing agent of the disperse dye meets the standard according to K;
When K is less than or equal to K0, the ink preparation system judges that the addition amount of the dispersing agent meets the standard;
when K > K0, the ink preparation system determines that the addition amount of the dispersant does not meet the standard and adds the addition amount of the dispersant to the mixed liquid.
4. The method for producing a water-soluble sublimation transfer printing ink according to claim 3, wherein in the step s3, when the ink production system determines that the addition amount of the dispersant does not meet the criterion, the ink production system determines the addition amount of the dispersant based on the detected aggregation number K of the disperse dye particles, the ink production system is provided with a first preset aggregation number criterion K1, a second preset aggregation number criterion K2, a first preset dispersant addition coefficient β1, a second preset dispersant addition coefficient β2, and a third preset dispersant addition coefficient β3, wherein K0 < K1 < K2, β1 < β2 < β3,
when K is smaller than K1, the ink preparation system adopts a first preset dispersant addition coefficient beta 1 to adjust the addition amount of the dispersant;
when K1 is less than or equal to K2, the ink preparation system adopts a second preset dispersant addition coefficient beta 2 to adjust the addition amount of the dispersant;
when K is more than K2, the ink preparation system adopts a third preset dispersant addition coefficient beta 3 to adjust the addition amount of the dispersant;
When the ink preparation system adjusts the addition amount of the dispersant by adopting an ith preset dispersant addition coefficient betai, wherein i=1, 2 and 3, the adjusted addition amount of the dispersant is denoted as ma ', and ma' =ma×k×betai/K0 is set, wherein ma is the addition amount of the dispersant in the mixed liquid before adjustment.
5. The method of preparing a water-soluble sublimation transfer printing ink according to claim 2, wherein in the step s03, the step of preparing the comparative print sample includes:
step s031, placing the ink printed sample and a set dose of hot water in a stirring barrel for soaking for 30 minutes, wherein the temperature of the hot water is set to 120 ℃, and the purity of the hot water is analytically pure;
step s032, stirring the soaked ink printing sample in a stirring barrel for 1 hour, setting the stirring rotation speed of the stirring barrel to 1400 revolutions per minute, and switching the stirring forward and reverse rotation for 10 seconds/time;
and s033, collecting the stirred water solution for stirring after stirring to analyze ink residual substances, and sequentially spin-drying and drying the stirred ink printing sample to obtain the comparative printing sample.
6. The method according to claim 5, wherein in the step s04, the ink preparing system detects color values of the ink printing sample and the contrast printing sample by using a color difference detector to determine whether the color values of the i-th ink printing sample in the ink printing sample detected by the color difference detector are in accordance with ink printing color standards, wherein the color difference detector is preset with a first ink printing red-green standard A1, a second ink printing red-green standard A2, a first ink printing yellow-blue standard B1, a second ink printing yellow-blue standard B2, a first ink printing brightness standard L1 and a second ink printing brightness standard L2, wherein A1 < A2, B1 < B2,0 < L2, and the color value of the i-th ink printing sample detected by the color difference detector is recorded as (ai, bi, li) and calculates respective average color values of (a+ … … +bp+i)/i+35i+1+i+35i+i+i (a+1+i),
When A1 is more than or equal to ap and less than or equal to A2, B1 is more than or equal to bp and less than or equal to B2, and L1 is more than or equal to lp and less than or equal to L2, the color difference detector preliminarily judges that the ink printing sample meets the color standard;
when ap < A1, ap > A2, bp < B1, bp > B2, lp < L1 or lp > L2, the color difference detector determines that the ink printed sample does not meet the color standard.
7. The method according to claim 6, wherein in the step s04, the ink preparation system is provided with an ink standard printing red-green standard A0, an ink standard printing yellow-blue standard B0, an ink standard printing brightness standard L0, an ink printing red-green color difference value standard A0, an ink printing yellow-blue color difference value standard B0 and an ink printing brightness difference value standard L0, wherein A1 < A0 < A2, B1 < B0 < B2,0 < L1 < L2 < 100, B0 > 0, when the color difference detector preliminarily determines that the ink printing sample meets the color standard, the ink preparation system determines whether the average color value (ap, bp, lp) of the calculated ink printing sample meets the ink standard printing standard (= ap, < bp, = p) meets the ink printing sample set-p 0, bp-p 1 is equal to the ink printing standard ii-p 0,
When fatliquor A0, fatliquor B0 and fatliquor lp L0 are less than or equal to fatliquor A0, fatliquor B0 and fatliquor lp L0, the ink preparation system judges that the ink printing sample meets the color standard;
when fatap fatb 0, or fatlp fatl 0, the ink preparation system determines that the ink printed sample does not meet the color criteria.
8. A water-soluble sublimation transfer printing ink prepared by the method of any one of claims 1-7, wherein the ink comprises disperse dye, methanol, neopentyl glycol, hydroxypropyl methylcellulose and water; the purity of each component is industrial purity, and the binder of the ink adopts degradable resin with molecular weight smaller than that of small molecules.
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