51 results about "Dye uptake" patented technology

The invention belongs to the technical field of textile dyeing, and provides a salt-free alkali-free electrostatic spray dyeing method for cellulosic fibers, which comprises the following steps: uniformly mixing polyethylene oxide, reactive dye and solvent to obtain electrostatic dye liquor; the method comprises the following steps: dissolving a cationic modifier and an alkaline color fixing agent in water to prepare a cationic modified solution, padding a cellulose fiber fabric, and drying to obtain a cationic modified cellulose fiber fabric; and spraying the electrostatic dyeing liquid to the surface of the cationic modified cellulose fiber fabric through electrostatic spraying, and carrying out open-width steaming color fixation and cleaning to obtain the electrostatic spraying dyed cellulose fiber fabric. The electrostatic spraying technology is adopted to replace traditional water bath dyeing, excellent K / S value, dye uptake and color fastness can be achieved without consuming a large amount of salt, alkali and water, water resource consumption and environmental pollution are remarkably reduced, and high-salinity and high-chroma printing and dyeing wastewater is avoided.

The invention belongs to the field of textile dyeing and finishing, and relates to a dyeing method capable of regulating and controlling in-situ assembly of dye molecules through cellulose fiber graft modification. The dyeing method comprises the following steps: soaking a cellulosic fiber textile in a 4-beta-hydroxyethylsulfonyl sulfate aniline-2-sulfonic acid aqueous solution for reaction, washing with water, drying, soaking in a hydrochloric acid aqueous solution, adding a sodium nitrite aqueous solution for reaction, adding urea, washing with water, and drying to obtain the cellulosic fiber textile. Soaking in a coupling component aqueous solution containing a coupling component, sodium hydroxide and sodium carbonate for reaction, alternately washing with hot water and cold water, and drying to obtain the dyed textile. The dyeing method is mild in condition, dye hydrolysis is avoided, the dye uptake and the dyeing fastness are improved, and the dye utilization rate is high; high temperature and a large amount of inorganic salt or auxiliaries are not needed, the dye is directly generated and fixed in the fiber, energy consumption is remarkably reduced, and waste water treatment pressure is reduced.

The invention provides a dyeable high-temperature-resistant modified meta-position aramid fiber and a preparation method thereof. The modified meta-aramid fiber is mainly prepared from a spinning solution prepared from m-phenylenediamine, methyl 3, 5-diaminobenzoate, 3, 3 '-diaminodiphenyl sulfone and an isophthaloyl dichloride copolymer through dry spinning, and the dye uptake of a disperse dye is not lower than 85%; the thermal decomposition temperature is not less than 400 DEG C. The preparation method comprises the following steps. S1, fully continuous polymerization; s2, continuously neutralizing and conveying; s3, direct spinning; and S4, fiber forming and post-treatment. The method has the advantages that (1) the quality difference between batches in the traditional intermittent method is eliminated, and the uniformity and stability of the product performance are realized; and the preparation process is compact, the production efficiency is high and the energy consumption is low. And (2) the dyeing performance of the prepared fiber is obviously improved, the inherent high-temperature-resistant characteristic of the aramid fiber is maintained, and the mechanical property is excellent. And (3) the application range of the meta-position aramid fiber is expanded.

The present application relates to a kind of acrylic fabric dyeing and finishing process, including low temperature adding disperse dye, and glacial acetic acid is used to dye fabric, when the dosage of disperse dye exceeds 2.0%, it needs to be reduced twice cleaning, when the dosage of dye is 0.5%~2.0%, it needs to be reduced once cleaning, remove surface attached disperse dye;When the dosage of dye is 0.5% or less, it does not need to be reduced cleaning, after completing reduction cleaning, adding organic acid to fabric for acid neutralization treatment, dehydration after tank, opening, setting.The present application can realize energy saving and time saving in dyeing process, improve the turnover rate of dyeing vat, can satisfy full color system dyeing, high dye uptake, bright color, high color fastness, good cloth surface quality.After dyeing, the hand feeling is softer than conventional polyester.

The invention discloses a bisazo blue reactive dye for high-temperature dip dyeing as well as a preparation method and application of the bisazo blue reactive dye. The reactive dye is shown in a structural general formula (I). A color body of the reactive dye is of a bisazo structure, the color body contains two naphthalene ring structures and a benzene ring structure, and an active group in a dye molecular structure is quaternary ammonium salt containing a nicotinic acid structure. According to the present invention, the binding force between the dye and the fiber can be improved through the coplanarity of the chromophore molecules, the dissociation between the dye and the fiber at the high temperature can be reduced, and the dye uptake of the dye at the high temperature can be improved, such that the fixation rate between the dye and the fiber can be improved; meanwhile, quaternary ammonium salt containing a nicotinic acid structure can react with fibers under the high-temperature neutral condition, an alkaline agent does not need to be added in the whole dyeing process, the problem of environmental pollution caused by the alkaline agent in the printing and dyeing wastewater is solved, and wide application prospects are achieved.

This invention relates to the field of textile printing and dyeing, and discloses a high-colorfastness polyamide 56 fabric and its preparation method. The polyamide 56 fabric contains 70-100% polyamide 56 fiber and 0-30% spandex. The fabric has been dyed at least once, and the dye used for dyeing is a reactive dye. The polyamide 56 fabric dyed with reactive dyes of this invention has the advantages of higher dye uptake, wider pH adaptability, no need for large amounts of calcium salts for dyeing, and minimal or no use of color-fixing crosslinking agents.

The invention discloses a chinlon 6 filament based on high carboxyl modification and a preparation method thereof, and belongs to the technical field of chinlon production. The polyamide 6 filament based on high carboxyl modification is prepared by adopting PA6 slices with low-end amino groups and high-end carboxyl groups as raw materials, the ordered combining capacity of fibers and anionic dye is enhanced by reducing the content of the end amino groups and increasing the proportion of the end carboxyl groups, the dye is prevented from being accumulated on the surface, the dyeing uniformity and the dyeing permeability of the polyamide 6 filament are improved, and the dyeing quality of the polyamide 6 filament is improved. Meanwhile, the production parameter combination is precisely regulated and controlled, so that more microporous structures are reserved to adsorb the dye while the high viscosity of the high-carboxyl section is solved in the production process, and dye molecules are more easily diffused into the fiber; the prepared chinlon 6 filament based on high carboxyl modification realizes high-saturation and high-uniformity dyeing under low dye concentration, has ideal dye-uptake and fixation rate, and also has excellent dyeing effect on light-color sensitive colors, not only reduces the washing times after the chinlon filament is dyed, but also does not fade after being washed for multiple times.

The invention relates to the technical field of chemical textile processing, and discloses a polylactic acid / nanocellulose composite fiber dyeing process, which comprises a spinning solution preparation process, a spinning process and a dyeing process, and the spinning solution preparation process comprises the following steps: uniformly mixing a nanocellulose suspension, a polylactic acid solution and an additive, standing at 30-80 DEG C for 1-2 hours, performing high-energy electron beam radiation to form gel, and washing the gel to obtain a hydrogel spinning solution; in the spinning process, the hydrogel spinning solution is fed into wet spinning equipment for spinning to form fibers, the fibers are subjected to high-energy electron beam radiation drying reinforcement to obtain fiber filaments, the irradiation dose is 10-50 kGy, and the irradiation time is 3-5 minutes. The preparation method disclosed by the invention is simple, feasible, green and environment-friendly, the dye uptake of the prepared composite fiber reaches 80%, the strength of the composite fiber is enhanced by 1-2 times, and the fibrillation resistance is improved by 1-2 times.

This invention belongs to the field of yarn dyeing technology, specifically relating to a method for dyeing warp beams of high-elasticity polyester-cotton yarn. The method includes a warp beam dyeing stage, a polyester dyeing stage, and a cotton dyeing stage. This invention explores and researches the winding and dyeing processes, ultimately breaking away from traditional winding methods and dyeing processes to improve the elasticity damage problem during the dyeing of Macca yarn. The warp beam sandwich provides a buffer space for yarn shrinkage, improving the elasticity of the dyed yarn. Lowering the polyester dyeing temperature, while ensuring dye uptake and colorfastness, improves yarn elasticity. The reduction and cleaning process using sodium hydrosulfite further enhances colorfastness.

The invention provides a dye compound, a preparation method thereof, an alkali-resistant high-water-washing disperse dye and application thereof, and particularly relates to the technical field of dye chemical industry. The dye compound has a structure as shown in a formula I, in the formula I, R1 is selected from substituted or unsubstituted nitrophenyl, 6-nitro-benzothiazolyl, 6, 7-dichlorobenzothiazolyl or 5, 6-dichlorobenzothiazolyl; r1 is selected from methyl or hydrogen atom, R2 is selected from methyl or hydrogen atom, R3 is selected from methyl, ethyl, allyl and cyanomethyl, and R4 is selected from bromine, chlorine, cyano or methyl. According to the dye compound provided by the invention, the azo group and R1 act together, so that the dye compound possibly has rich colors; r1, R2, R3 and R4 substituent groups influence the hydrophilic-hydrophobic property of molecules and the binding capacity with fibers, and the affinity of the dye to the fibers is improved, so that the dye uptake is improved. The interaction between a benzene ring or a benzothiazole ring and a substituent group in the structure endows the dye compound with good color fastness.

The invention relates to the technical field of textile printing and dyeing, and particularly discloses a green reactive dye composition, a reactive dye product and application. The green reactive dye composition comprises a component A, a component B and a component C, wherein the component A is selected from at least one of dye compounds as shown in a formula (I); the component B is selected from at least one of dye compounds as shown in a formula (II); and the component C is selected from at least one of dye compounds as shown in a formula (III). The green reactive dye composition has the advantages of high compatibility, good stability, uniform dyeing, no dyeing defect and high dyeing color fastness, also has the characteristics of high fixation rate, high dye uptake and high dyeing efficiency, can stably dye in low-temperature, low-bath-ratio, low-salt and low-alkali environments, reduces the dyeing cost, and has commercial application prospects and economic values. Formula (I): Formula (II): Formula (III): Formula (I): Formula (II): Formula (III):

A blended fabric having a patterned color includes a first portion composed of cotton and a second portion composed of polyester. A dye having a strong affinity for cotton and a slight affinity for polyester is applied to the fabric. The dye imparts a dark black color to the cotton portion and applies a light gray color to the polyester portion. The combination of dark black cotton and light gray polyester in combination provides the patterned color to the blended fabric. The blended fabric may be composed of a greater percentage of cotton than polyester, the cotton and polyester being spun into monofilament yarns that are then knitted into a plain knit style fabric, a looped knitted terry fabric, or a raised fabric. Furthermore, the present invention includes a blended fabric whereby the cotton rather than the polyester absorbs dyes to create darker and lighter patterns within the blended fabric.

A method of dyeing a textile, the method comprising depositing a metal organic framework (MOF) on at least one surface of the textile, thereby forming a MOF functionalized textile; contacting the MOF functionalized textile with a dye to form a dyed textile; and optionally drying the dyed textile. The metal organic framework functionalized textile can be effectively dyed by natural dye under the condition that a traditional mordant is not used, and has higher dye uptake and color fastness.

The invention discloses a high-temperature and high-dye-uptake dyeing method suitable for a disperse dye for a polylactic acid textile, and belongs to the technical field of textile. The dyeing method comprises the following steps: placing a disperse dye filter cake in solvent oil to dye a to-be-dyed object, including adsorption, diffusion and washing processes of disperse dye, and comprising the following steps: dyeing the to-be-dyed object in the solvent oil at room temperature by using the disperse dye filter cake, heating to 60-80 DEG C, then heating to 120-140 DEG C, keeping the temperature for 30-60 minutes, and then cooling to 40-50 DEG C; and washing and drying the to-be-dyed object after dyeing. The dyeing method is suitable for high-temperature and high-dye-uptake dyeing of the PLA textile by the disperse dye, the mechanical strength of the PLA textile is not affected at high temperature, the dye-uptake of the disperse dye is improved, and application of the PLA textile in the field of textile and clothing is accelerated.

The invention belongs to the technical field of textile preparation, and particularly relates to a nylon 12 fiber and a preparation method and application thereof. The nylon 12 fiber is prepared from the following raw materials in parts by mass: 98 to 100 parts of nylon 12 resin and 0 to 2 parts of auxiliaries, the nylon 12 resin is amino-terminated, and the amino-terminated content is 10-110 mmol / kg. The nylon 12 resin is adopted as an amino-terminated polymer, and the amino-terminated content meets the range, so that dyeing sites can be increased, molecular chain regularity can be reduced, an amorphous region can be increased, dye, especially acid dye, can be conveniently dyed, the dye-uptake and color fastness can be remarkably improved, the dye-uptake can reach 95% or above, and the color fastness can reach 95% or above. The color fastness to washing and the color fastness to perspiration can reach grade 4-5 and the like, good mechanical properties are kept, the application requirements of high-end garment materials are met, and the long-acting antibacterial performance is excellent.

The invention discloses a preparation method of dyeable seaweed fiber, belonging to the technical field of textile chemical engineering. It mainly solves the technical limitations that existing seaweed fibers are not salt-tolerant and cannot be dyed, which is a technical breakthrough for dyeing seaweed fibers. First, fiber-grade sodium alginate powder is made into a spinning solution, and by using wet spinning equipment and process, after coagulation, drawing, and water washing, seaweed fiber is obtained after cross-linking post-treatment and drying. During the production process, water-soluble aluminate can be added in any and all processes of the spinning solution, coagulation bath, and cross-linking, and then dyeable seaweed fiber can be obtained. The seaweed fiber prepared by the method of the invention is dyed with reactive dyes, the dye uptake rate of the dye on the fiber is greater than or equal to 60%, the fiber strength damage is small, and the soaping fastness is ≥4 levels.

The application provides a cotton fiber dyeing method of a polar / non-polar binary non-aqueous medium system. The method comprises the following steps: S1, placing cotton fabric, a dye, water, an alkali agent and a polar solvent A in a sealed dyeing tank and filling CO2 for dye dissolution to obtain a mixed system; S2, regulating parameters of the sealed dyeing tank for dyeing; S3, adding a non-polar solvent B to the sealed dyeing tank for fixation treatment; and S4, after cooling to room temperature, taking out the cotton fabric, washing, drying and completing the dyeing. By introducing a CO2 responsive polar solvent, the polarity is enhanced when CO2 is filled, so that high-concentration reactive dyes are fully dissolved at low temperature and almost no hydrolysis occurs, the dosage form is reduced after CO2 is released, the dyes are uniformly precipitated and quickly adsorbed on the cotton fiber, so that the high-concentration dyeing build-up is significantly improved, the dye hydrolysis rate is significantly reduced, the dye uptake is improved to more than 95%, the medium and CO2 can be recycled, and the efficient, green and low waste discharge of cotton fiber deep and thick color dyeing is realized.

The invention relates to the technical field of fiber dyeing, in particular to an isoparaffin medium cationic dye dyeing method for aramid fiber, which comprises the following steps: S1, preparing dye liquor consisting of cationic dye, isoparaffin serving as a dyeing medium and a polar auxiliary serving as a dyeing auxiliary; s2, aramid fibers are added into the dye liquor, and dyeing treatment including heating, heat preservation and cooling is carried out; s3, the dyed aramid fiber is subjected to post-treatment, and the dyed aramid fiber is obtained. According to the method, the technical problems of high energy consumption, heavy pollution, low dye uptake and the like in the existing aramid fiber dyeing are solved, and efficient, level-dyeing and environment-friendly dyeing can be realized under mild conditions.

The invention provides a dyeing and sizing assembly and a dyeing and sizing combination machine, and relates to the technical field of textile equipment. The dye slurry assembly comprises a dye vat and a plurality of dye uptake rollers, the dye uptake rollers are arranged in the dye vat, and at least parts of the dye uptake rollers are sequentially arranged in the length direction of the dye vat; wherein the object to be dyed is alternately and sequentially wound around the dyeing rollers in an S-shaped mode. On the premise that the dyeing quality is guaranteed, the mutual restriction relation between the existing adsorption rate and the vehicle speed can be broken through, and the uniformity of the dye liquor is effectively improved.

The invention discloses a cashmere low-temperature dyeing process based on enzyme treatment. The process comprises cashmere fiber pretreatment, first enzyme treatment, second enzyme treatment, low-temperature dyeing and post-treatment. Putting the cashmere fibers into a compound enzyme treatment solution for treatment; the compound enzyme treatment liquid contains keratinase, ligninase, pectinase, laccase, a penetrant and water; the cashmere is subjected to mild treatment by compounding a plurality of proteases, and a scale layer is effectively modified on the premise of not damaging a fiber main body, so that high-quality dyeing under medium and low temperature conditions is realized, the dyeing temperature is reduced from 100 DEG C to 60-75 DEG C, and the energy consumption is reduced. The enzyme pretreatment provides more channels and dyeing seats for the dye, the dye uptake is obviously improved, and the color fastness reaches grade 4 or above. The use of strong acid and a large amount of inorganic salt is avoided, the COD (Chemical Oxygen Demand) and salt content in the wastewater are reduced, and the sewage treatment pressure is reduced. And the biological enzyme is biodegradable, so that the environmental load is small.

This invention relates to the field of textile printing and dyeing technology, and discloses a method for preparing high-color-fastness, low-temperature, energy-saving dyed elastic fabric. The method includes: feeding a polyester / polyurethane interwoven elastic fabric into a dyeing machine; adding water to adjust to a first temperature; adding anhydrous sodium sulfate, sodium diisobutyl sulfosuccinate, and fatty alcohol polyoxyethylene ether in a circulating cycle; raising the temperature to a second temperature and adding propylene carbonate; subsequently adding gluconate-δ-lactone and Disperse Red 60, and circulating at a constant temperature; then raising the temperature to the highest dyeing temperature and holding; lowering the temperature to a third temperature and draining the dye liquor; refilling with water and adding fatty alcohol polyoxyethylene ether for hot water washing; and finally, rinsing with cold water and setting. This invention utilizes the low-temperature swelling effect of propylene carbonate and the slow-release acid-producing mechanism of gluconate-δ-lactone to control the highest dyeing temperature at 92–98°C, avoiding heat damage and elasticity loss of polyurethane fibers, improving dye uptake and fabric color fastness, while reducing dyeing energy consumption.

The present invention discloses a cationic modifier, a preparation method and an application process thereof. The modifier has the following structural formula: The present invention has the beneficial effect that the dye uptake of cellulose fibers modified with the cationic modifier of the present invention is increased by about 30% compared with unmodified cellulose fibers, the bottom water of the dye liquor is almost colorless, and no sodium sulfate is required to promote dyeing and soda ash is required to fix the color during the dyeing process, thus truly realizing a new salt-free dyeing process and enabling the bottom water of the dye liquor to be recycled; comparative data from dyeing factories show that, when achieving the same dyeing depth, the new salt-free dyeing process reduces carbon emissions by about 35% compared with conventional dyeing processes and reduces wastewater emissions by 20 tons per 10,000 meters.

The application discloses a transfer film using cationic digital ink, which comprises a carrier, an ink receiving layer and a protective layer from bottom to top, wherein the thickness of the ink receiving layer is 1-5 mu m, and the thickness of the protective layer is 1-3 mu m. The polyvinyl alcohol with an average molecular weight of 130-160 thousand Da and the polyurethane resin dispersion are used together to improve the color luster of the film after transfer, increase the dye uptake rate, and realize the transfer of deep color patterns. The color of the pattern after transfer is bright, the ink can be prevented from penetrating after printing on the fabric, the ink is saved, the fixing effect of the cationic dye on the textile can be realized at a relatively low temperature, and the purpose of saving energy is achieved.

The invention relates to the technical field of cashmere dyeing, and discloses modified collagen, a preparation method and application thereof and a fabric dyeing method. The modified collagen contains collagen peptide and a modified group which is covalently connected with the collagen peptide through an amido bond. The preparation method of the modified collagen comprises the step of contacting collagen with a modifier and carbodiimide for reaction. The modified collagen prepared by the method is used for a low-temperature dyeing process of cashmere, compared with the traditional dyeing of cashmere, the energy consumption is low, the cost is low, the damage of mechanical strength of fibers is reduced, the soft hand feeling of the cashmere is kept, the dye uptake of a lanasol dye is improved, the leveling property is also greatly improved, the treatment difficulty of wastewater is greatly reduced, and the method is suitable for industrial production. Good industrial prospects are realized.

The invention relates to the technical field of fiber surface reconstruction and the technical field of low-temperature dyeing, and discloses a low-temperature dyeing processing method of hydrophilic modified polyester fibers, which specifically comprises a polyester hydrophilic modification technology and a low-temperature dyeing technology. According to the efficient deep-eutectic solvent, the polyester fabric is etched, a hydrophilic surface is obtained under the condition that the aggregation state structure and the mechanical property of polyester are not affected, efficient adsorption and diffusion of dye on the surface of the fabric are effectively promoted, and low-temperature dyeing is achieved. The high-temperature and high-pressure conditions are abandoned, the high dye uptake is kept, the process is optimized, and the dyeing effect is improved. The processing technology disclosed by the invention has the advantages of mildness, no pollution, low cost, circulation, energy conservation and the like, and is controllable, non-toxic and pollution-free. Good market application prospects are realized.

The present invention relates to the technical fields of fluorescent dye synthesis, fluorescence imaging, and bio-sensing. Disclosed are an amide cyanine dye, an efficient synthesis method therefor, and a use thereof in fluorescence imaging. Compared with traditional cyanine dye synthesis methods, the amide cyanine dye synthesis method of the present invention is simple and has few by-products, short reaction time, high yield, a stable structure, and high universal applicability. By increasing the length of a conjugated chain, the absorption and emission wavelengths of the amide cyanine dye can be expanded from a short-wave near-infrared region to a near-infrared-II band. Experiments have proven that the amide cyanine dye has good photophysical properties and the potential for biofluorescence imaging, and can be used in biometric imaging, super-resolution fluorescence imaging of cellular mitochondria, protein labeling, specific recognition of antibodies, nucleic acid labeling, DNA sequencing, tumor photodynamic therapy, etc. On the basis of the advantages, the amide cyanine dye of the present invention has good prospects for application in the field of biofluorescence imaging research.

A method of dyeing a textile, the method including depositing a metal-organic framework (MOF) on at least one surface of the textile thereby forming a MOF functionalized textile; contacting the MOF functionalized textile with a dye thereby forming a dyed textile; and optionally drying the dyed textile. Metal-organic framework functionalized textiles can be dyed with natural dyes effectively with higher dye uptake and colorfastness without the use of traditional mordants.

The invention discloses a near-infrared self-flickering fluorescent dye as well as a preparation method and application thereof. The near-infrared self-flickering fluorescent dye has one of structures as shown in a formula I and a formula II. Azetidine is introduced to inhibit a twisted charge transfer effect in molecules, so that silicon rhodamine has the characteristics of high light stability, high brightness, cell permeability and the like. Based on thermodynamic equilibrium of intramolecular spiralization of a benzyl alcohol structure in the dye, the fluorescent dye can realize single-molecule localization super-resolution fluorescence imaging of various subcellular structures in living cells, and realizes visualization of structures including lysosomes, mitochondria, cell nucleuses, microfilaments and the like on a nano scale. Besides, the absorption wavelength of the dye is 650nm, the fluorescence emission wavelength reaches 666nm and reaches a near-infrared region, damage of exciting light to cells is reduced in the super-resolution imaging process, and the dynamic life process of the cells under normal physiological conditions can be visualized;

The present invention relates to the technical field of chemical textile processing. Disclosed is a dyeing process for a polylactic acid / nanocellulose composite fiber, comprising a spinning solution preparation step, a spinning step and a dyeing step, wherein the spinning solution preparation step comprises uniformly mixing a nanocellulose suspension, a polylactic acid solution and an additive together, standing at 30-80°C for 1-2 h, performing high-energy electron beam radiation to form a gel, and washing the gel with water to obtain a hydrogel spinning solution; the spinning step comprises feeding the hydrogel spinning solution into a wet spinning device for spinning to form a fiber, and subjecting the fiber to high-energy electron beam radiation for drying and reinforcement to obtain a fiber filament, wherein the irradiation dose is 10-50 kGy, and the irradiation time is 3-5 minutes. The preparation method in the present invention is simple and easy to implement, and is environmentally friendly; the dye uptake rate of the prepared composite fiber reaches 80%, the strength of the composite fiber is enhanced by 1-2 times, and the anti-fibrillation property is improved by 1-2 times.

The present application relates to the technical field of textile printing and dyeing, and discloses a hot melt dyeing method of high-dye-uptake nano liquid dye, which comprises the following steps: S1, dip-dyeing and dip-padding of polyester fabric in a dyeing solution, wherein the dyeing solution comprises modified nano liquid dye, thickening agent, defoaming agent and water; the modified nano liquid dye is modified polyaniline layer-coated nano liquid dye; S2, drying and baking treatment of the dip-padded polyester fabric; S3, finally, post-finishing is performed to obtain a polyester dyed product. The present application selects nano liquid dye, which has low impurity content and high dyeing rate, and the color light can reach the standard without washing. The excellent dyeing uniformity and dyeing color fastness of the modified polyaniline layer-coated nano liquid dye are relied on, and the hot melt dyeing process is adopted, and the appropriate post-finishing process is selected, so that the traditional dyeing effect is achieved, and the purpose of energy saving and emission reduction is finally realized.