71 results about "Dye uptake" patented technology

The invention discloses a low-temperature one-bath dyeing process for a cotton-polyester blended fabric, which comprises the following steps: soaking the cotton-polyester blended fabric in an aqueous solution of a basic ionic liquid for pretreatment to obtain a pretreated fabric with liquid; mixing the pretreated fabric with the liquid with a reactive dye and a disperse dye, and then carrying out supercritical CO2 fluid dyeing to obtain a dyed fabric; the alkaline ionic liquid contains hydrophobic alkyl and is alkaline, alkaline anions and cellulose hydroxyl form a hydrogen bond network during pretreatment, a cellulose crystalline region is destroyed, and therefore the dye uptake is increased; during dyeing, the alkaline ionic liquid is used as a surfactant to be distributed on an interface of water and CO2 fluid to form a reverse emulsion, so that a microenvironment for the reactive dye to dye cotton fibers is provided; furthermore, alkaline anions of the alkaline ionic liquid can be subjected to exchange reaction with CO2 to generate carbonate, so that the polarity of a microenvironment is enhanced to be alkaline, the reaction activity of the reactive dye and the cotton fibers is improved, and the dye uptake is improved.

The invention belongs to the technical field of textile pretreatment processes, and particularly discloses a low-temperature washing-free short-process pretreatment process which comprises the following steps: (1) padding a fabric in a working solution, and stirring for 10-12 hours at 20-25 DEG C. The working solution comprises the following raw materials: a scouring agent, an alkali-resistant penetrant OEP-70, hydrogen peroxide, sodium silicate, ethylenediamine tetra (methylene phosphonic acid) pentasodium salt, caustic soda and water; (2) adding a water-free washing agent into the fabric subjected to padding treatment, and heating for 10-15 minutes at the temperature of 98-100 DEG C; (3) carrying out deoxidization treatment on the treated fabric; (4) immersing the treated fabric into the complex liquid, and stirring for 20-25 minutes at the temperature of 40-45 DEG C; the composite liquid is prepared from sodium dodecyl sulfate, modified chitosan, carboxymethyl cellulose, modified plant ash, polyethylene glycol and water. The fabric treated by the method is low in water consumption and high in dyeing efficiency and dye uptake, and the quality of the fabric is improved.

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 discloses a cationic pretreating agent and application thereof in a pad dyeing process of cotton fabrics. The cationic pretreating agent is prepared from the following components in percentage by mass: 1-10wt% of a cationic modifier; 0.1-1 wt% of an alkaline agent; and the balance of ultrapure water. The method comprises the following steps: (1) washing the cotton fabric with ultrapure water, and drying; (2) padding a cationic pretreatment agent; (3) baking at 100 DEG C for 2-6 minutes; (4) dyeing: performing pad dyeing on the pretreated cotton fabric with an active dye; (5) color fixation: directly putting the cotton fabric into a steamer at 100 DEG C for steaming and color fixation for 8-12 minutes without drying the cotton fabric; (6) washing: washing the cotton fabric subjected to color fixation for multiple times; and (7) drying. According to the invention, a limited amount of cationic modifier is utilized, and through the synergistic effect of the cationic modifier and sodium carbonate, the problems of large use amount of salt and alkali auxiliaries, much wastewater, low dye uptake and non-ideal fixation rate in the cotton fabric dyeing process in the prior art are fundamentally solved, and the color performance of the dyed fabric is improved; and the vacancy of a multi-factor interaction mechanism in the prior art is filled.

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 relates to a bio-based anthraquinone acid dye and a preparation method thereof, and belongs to the field of dye chemical industry and textile printing and dyeing. The anthraquinone acid dye containing bio-based amine or bio-based amino acid is simple in preparation method and can be used for dyeing wool fibers. The preparation method specifically comprises the following step: condensing bromamine acid with bio-based amine or bio-based amino acid under the action of a catalyst to obtain the bio-based acid dye. When the acid dye is used for dyeing wool fabrics, relatively high dye-uptake and good leveling property can be obtained, the fastness to washing, the fastness to rubbing, the fastness to light and the like of the fabrics are improved, and each color fastness reaches grade 4 or above. The acid dye disclosed by the invention is simple in preparation method, mild in reaction condition, easily available in raw materials and less in pollution, is a bio-based, green and environment-friendly product, and has dual effects of saving petroleum resources and protecting the environment.

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 textile fabric dyeing, in particular to an alkali-resistant disperse dye and a polyester-cotton fabric one-bath dyeing process. The alkali-resistant disperse dye comprises a disperse azo pigment, 3-chloro-2-hydrazinopyridine and an auxiliary agent. The mass ratio of the dispersed azo pigment to the 3-chloro-2-hydrazinopyridine is 100: (30 to 40). The ring N of the 3-chloro-2-hydrazinopyridine and the azo bond of the dispersed azo pigment form pi-pi conjugation, meanwhile, the steric hindrance is increased, and hydrolysis of alkali liquor to the azo bond is jointly inhibited, so that the disperse dye has good alkali resistance and can be mixed with reactive dye in an alkaline environment for one-bath dyeing. According to the present invention, the hydrazine group of the 3-chloro-2-hydrazinopyridine has good hydrophilicity, and the solubility of the dispersed azo pigment conjugated by the 3-chloro-2-hydrazinopyridine in water is improved, such that the heating temperature of the one-bath dyeing can be reduced, the destructive effect of the strong alkali high temperature on the polyester and the cotton fiber can be reduced, and the dye uptake can be improved;

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 present invention provides an improved short wet steaming dyeing process for reactive dyes on all-cotton knitted fabrics, which is characterized in that the steps include: S1, padding the dye liquor and auxiliaries; S2, quickly drying with a drying cylinder, adding a double-row drying cylinder and a temperature and humidity detection system, and installing a C-type steam adjustable heating device on the outer layer of the drying cylinder to control the final liquor pickup of the dyed fabric at 30±5%; S3, quickly steaming; S4, cold water washing, washing at room temperature through 2 water washing tanks; S5, hot water washing; S6, soaping; S7, high-temperature water washing; S8, acid washing. It solves the curling phenomenon of knitted fabrics, reduces the liquor pickup of the fabric surface, reduces steam consumption, controls the pre-drying degree of both sides of the fabric surface, reduces the dye migration during the dyeing process of knitted fabrics, alleviates dye hydrolysis, and improves the dye uptake rate and fixation rate.

The invention provides an anti-fuzzing and anti-pilling dyeing and finishing process for knitted fabrics, and relates to the technical field of textile processes, the anti-fuzzing and anti-pilling grade of the knitted fabrics treated by the process is remarkably improved, the process can make dyes more uniformly and fully permeate and adhere to fibers, the dye uptake is remarkably improved, and the anti-fuzzing and anti-pilling performance of the knitted fabrics is improved. By accurately controlling the parameters of each dyeing and finishing link, the shrinkage rate of the fabric is effectively reduced, the dimensional stability of the fabric is improved, the time and energy consumption in the production process is reduced due to the optimized process parameters, and the defective rate is reduced due to the stable process control, so that the production efficiency is improved, the production cost is reduced, and the product quality is improved. The process is suitable for various common knitted fabrics, such as pure cotton, polyester cotton blending and pure polyester, a unified and effective dyeing and finishing scheme is provided for enterprises to produce different types of knitted products, the market adaptability of the enterprises is enhanced, and the quality indexes of the knitted fabrics in multiple aspects, such as fuzzing and pilling resistance, color effect, shrinkage rate and hand feeling, are comprehensively improved.

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 present invention discloses a water-saving polyester-cotton dyeing process, which dyes polyester-cotton blended fabrics using a non-aqueous medium, employs a disperse accelerating agent with a specific structure, and performs alkali pretreatment on the polyester-cotton blended fabrics, and cooperates with a two-stage heating dyeing process, thereby improving the levelness, dye uptake rate and color depth of the fabrics, reducing the staining of disperse dyes on cotton; in addition, the process flow provided by the present invention is short, greatly reduces water consumption, improves the utilization rate of dyes, and is suitable for industrial application.

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 relates to the technical field of polarizers, in particular to a multi-band dichroism dye-based polarizer optical improvement method, which effectively solves the problem of large polarization degree difference of a traditional polarizer in a multi-band range by adopting a mixed system of stilbene and indole dyes. By reasonably adjusting the mixing ratio of the dichroic dye to be between 1: 1 and 1: 3, the polarization degree difference of the blue light band and the red light band is successfully controlled within 2%, the improvement not only improves the color rendition capability of the multicolor display system, but also effectively reduces color cast and uneven brightness caused by the polarization characteristic difference of different bands, and in addition, the color rendering effect of the multicolor display system is improved. Due to the design of the multi-layer composite dye structure, dye absorption peaks of all the layers are complementary, the multi-band optical performance is greatly improved, and particularly, the dye is excellent in high dynamic range display (HDR) and multi-spectral imaging equipment.

The invention discloses a disperse yellow dye composition, a dye product and application thereof. The disperse yellow dye composition comprises a component A and a component B, the component A is selected from at least one of compounds shown in a formula (I), and the component B is selected from at least one of compounds shown in a formula (II). The invention provides a disperse yellow dye product. The disperse yellow dye product comprises the disperse yellow dye composition and auxiliaries. The disperse yellow dye product provided by the invention has the characteristics of high dye uptake, good deep color dyeing property, excellent color fastness and the like when being applied to dyeing of polylactic acid fiber materials. # imgabs0 #

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.