1986results about "Dyeing process" patented technology

The invention belongs to the technical field of textile dyeing methods, and particularly relates to a tension-free anti-fibrillation dyeing method for lyocell blended yarn. The tension-free fibrillating-resistant dyeing method of the lyocell blended yarn comprises the following steps: preparing a bobbin-free loose yarn bundle, namely loosely winding lyocell pure spinning or blended yarn into tension-free yarn bundles of which the weight is 0.5-1.5 kg by adopting an integrated chuck bobbin, and meanwhile, wrapping the tension-free yarn bundles with knitted sock legs; according to the tension-free loose yarn bundle filling, a cross-shaped lifting chain is matched with a yarn bundle grate, staggered filling shaped like a Chinese character'pin 'is achieved, and the loading rate ranges from 90% to 120%. The tension-free one-bath dyeing / cross-linking comprises the following steps: pre-treating the filled tension-free loose yarn bundle, performing dyeing and cross-linking through a one-bath two-step method, and finally performing soaping, hot water washing, color fixation / softening one-bath treatment and radio frequency drying. According to the tension-free antifibrillating dyeing method for the lyocell blended yarn, dyeing is uniform, the color difference is small, and the percent of pass is increased.

The invention provides a substituted amino bipyridine derivative as well as a preparation method and application thereof, the structure of the substituted amino bipyridine derivative is as shown in formula I. In the formula, R1, R2, R3 and R4 are independently selected from any one of H, C1-C6 alkyl, C2-C6 alkenyl, C2-C20 alkynyl, C3-C6 cycloalkyl, C5-C20 aryl or C5-C20 heterocyclic radical; when R1, R2, R3 and R4 are not methyl, no more than one of R1, R2, R3 and R4 is H; and when any one of R1, R2, R3 and R4 is methyl, the rest groups are independently selected from H or methyl. When the substituted amino dipyridyl derivative provided by the invention is used as a blue dye, the dyed blue dye is bright in color, deep in dyeing and comprehensive in dyeing fastness; the preparation process is simple, convenient to purify, safe, simple, convenient and energy-saving, the product quality is stable, the reproducibility is good, the yield is high, and the method is suitable for industrial production.

The invention belongs to the technical field of textile, and relates to an efficient antibacterial fabric for preparing underwear and a dyeing and finishing method and application thereof.The provided antibacterial fabric is weft-knitted bird eye double-faced knitted fabric and is composed of polyester, cotton and modal fibers, the surface density is 180 g / m, surface yarn of the antibacterial fabric is hollow polyester fibers with special-shaped sections, and the surface yarn of the antibacterial fabric is hollow polyester fibers with special-shaped sections. The lining yarn is formed by weaving dacron and blended yarn according to the proportion of 2: 1. According to the method, dyeing and finishing of the antibacterial fabric, fabric weaving and ergonomic sewing are combined, the fabric which has efficient antibacterial performance, good moisture permeability and ultraviolet-proof performance and high color fastness is obtained, and the prepared antibacterial clothes are high in quick-drying performance, comfortable to wear and high in environmental adaptability.

The invention discloses a yellow reduction dyeing agent, a dyeing solution and a preparation method and application thereof, and relates to the technical field of dyeing and finishing. According to the yellow reduction dyeing agent provided by the invention, the 5-hydroxy-3-aminopyridine-2, 6-(1H, 3H)-diketone is adopted as a reduction dye, and the sodium sulfite is independently used as a reducing agent for reduction dyeing, so that the obtained dye leuco body is proper in dyeing capacity, and a dyed fabric can show excellent light brittle damage resistance. The fabric dyed by the dyeing agent has similar breaking strength before and after dyeing and even is slightly improved after dyeing and illumination, meanwhile, the color depth K / S of the fabric dyed by the dyeing agent reaches 3.2 or above, the dry and wet rubbing color fastness can reach level 4 or above, and the color fastness to illumination reaches level 6 or above.

The application discloses a kind of imitated plant leaf hydrogel composite material and preparation method thereof, belong to bionic composite material field.The application first by colorant compounding preparation printing paste, and fabric is printed, obtain the green fabric that can realize to plant leaf " green peak " and " red edge " spectral characteristic simulation, and with green fabric simulation leaf structure in fence organization and skeleton;Then with biomaterial polyvinyl alcohol (PVA) as base material, join with strong hygroscopic monomer and crosslinking agent, initiator blend preparation hydrogel prepolymer solution;Finally, hydrogel prepolymer solution is poured into the mold containing green fabric and copolymerization, it directly forms hydrogel in fabric surface and pore interior, obtains imitated plant leaf hydrogel composite material.The material gets rid of the dependence on hygroscopic salt, has water absorption and simulation effect stable, durability is good and the like advantages.

The invention belongs to the technical field of textile printing and dyeing, relates to an efficient reactive dye ink-jet dyeing process and application, and aims to solve the problems that the traditional dyeing proofing process is tedious, the color difference of front and back surfaces of ink-jet dyeing is large, and the dye utilization rate is low. The process comprises the following steps: firstly, padding a fabric in an aqueous solution until the pick-up rate is controlled to be 60-120%, and carrying out ink-jet printing on reactive dye ink (the viscosity is 3-10 mPa.s and the surface tension is 20-50 mN / m) in a wet fiber swelling state; after printing, a 1%-10% alkali solution is immediately padded to promote permeation of the dye; and then pre-drying at 60-70 DEG C, steaming with saturated steam at 100-102 DEG C for 5-15 minutes, and washing with water to complete color fixation. According to the technology, the K / S ratio of the front face and the back face of the dyed fabric is larger than or equal to 0.95, the color fastness of the dry friction level 4-5 or above, the color fastness of the wet friction level 4-5 and the color fastness of the soaping level 4-5 are achieved, and the technology is suitable for green efficient dyeing of small-batch multi-variety fabric.

The invention provides a washable stable humidity-sensitive printing paste composition, a humidity-sensitive printing paste and a preparation method and application thereof. The washing-resistant stable humidity-sensitive printing paste composition comprises humidity-sensitive resin, an interface anchoring agent, a rheology modifier, a latent cross-linking agent and water, the humidity-sensitive resin contains amino and / or hydroxyl, and the latent cross-linking agent is selected from oxime-terminated alicyclic polyisocyanates or derivatives thereof. The latent cross-linking agent has chemical inertness at room temperature and can ensure the rheological stability of the slurry in the printing process, in the baking process, an end-capping reagent in the latent cross-linking agent is dissociated, an isocyanate group and amino and / or hydroxyl in the humidity-sensitive resin are subjected to a cross-linking reaction to form a semi-interpenetrating network structure, and the structure allows water molecules to enter and exit, so that the moisture-sensitive printing ink is formed. The fabric has the humidity-sensitive response characteristic, excessive swelling and movement of hydrophilic chain segments can be limited, dissociation or falling of humidity-sensitive resin under the action of washing shearing force is prevented, and the humidity-sensitive characteristic and washing-resistant stability are improved.

The invention relates to the field of ink, in particular to bio-based elastomer heat transfer printing ink and a low-temperature microwave curing method thereof. The bio-based elastomer heat transfer printing ink at least comprises the following raw materials in parts by mass: 50-75 parts of a bio-based prepolymer, 5-10 parts of a cross-linking agent, 15-30 parts of an anti-pinhole agent, 0.5-1.5 parts of a curing catalyst, 5-15 parts of a pigment and 15-30 parts of a solvent. The bio-based elastomer thermal transfer printing ink finally prepared by the invention not only has an excellent transfer printing effect, but also can greatly improve the bio-based carbon content in the printing ink, and avoids the problems of environmental pollution and discontinuity; and on the other hand, compared with the traditional petroleum-based TPU ink, the required energy consumption is lower, the flexibility and the washability are also obviously improved, the pinhole defect is reduced, and the probability of secondary printing blooming caused by solvent migration is greatly reduced.

The invention relates to a flame-retardant antibacterial water-repellent elastic fabric and a preparation method thereof. Yarns adopted by the fabric comprise spandex fiber yarns, combed cotton yarns and spandex elastic fiber yarns. A double-sided circular knitting machine is adopted to weave grey cloth, and the obtained grey cloth is at least subjected to water-repellent finishing to obtain the fabric, the combed cotton yarn is used for being woven into the outer layer of the gray fabric, the spandex fiber yarn is used for being woven into the inner layer of the gray fabric, and the spandex elastic fiber yarn is used for being woven into the middle connecting layer of the gray fabric. The spandex fiber yarn, the combed cotton yarn and the spandex elastic fiber yarn are woven to form a unique organization structure, so that the fabric has the advantages of the three materials; the gray fabric obtained by weaving is subjected to water-repellent finishing, so that the lasting flame-retardant antibacterial and water-repellent functional fabric is obtained, and the fabric can be used for light sports or casual coats.

The invention provides high-grinding-efficiency color paste, a preparation method thereof and dispersed ink, and belongs to the technical field of dispersed ink, and the high-grinding-efficiency color paste comprises the following components in percentage by weight: 15%-30% of disperse dye toner, 15%-25% of a dispersing agent, 5%-15% of resin ammonium salt, 10%-20% of a dissolution promoting mixture, 0.5%-2% of a wetting agent and the balance of water; the dispersing agent comprises a hyperbranched polymer and a sodium naphthalene sulfonate improved polymer; the hyperbranched polymer takes a benzene ring as a center, hydrophobic groups and hydrophilic groups on a branched chain are randomly distributed, the hydrophilic groups of the branched chain comprise carboxylate and sulfonate, and the hydrophobic groups of the branched chain comprise alkane, ester and aryl. According to the invention, the hyperbranched polymer and the sodium naphthalene sulfonate improved polymer are mixed with the dispersing agent, so that the problem of abrupt change of ink viscosity can be avoided when the content of ink toner is relatively high, thereby obtaining the color paste with strong dispersion and high stability, and further obtaining the dispersed ink with good stability.

The invention discloses leather-imitated superfine fiber layered synthetic leather and a production process thereof, and belongs to the technical field of synthetic leather. The production process of the synthetic leather comprises the following steps: carrying out superfine fiber alkali treatment and DMC / HEMAP / UV-1 monomer graft copolymerization modification; forming a fiber net by air laying and gradient needling; anionic water-based PU resin containing wood powder is used for impregnation reinforcement, and soft hydrolysis-resistant water-based PU resin is used for coating to form a porous surface layer; and performing wet solidification, bionic embossing, cationic dye dyeing and surface finishing to obtain a finished product. Through fiber modification, gradient structure, bi-component PU cooperation and process optimization, the problems that traditional synthetic leather is hard in hand feeling, poor in breathability, low in texture simulation degree, difficult to dye, weak in interlayer binding force and the like are solved, and the product has high simulation degree and excellent comprehensive performance and stability.

The invention relates to the technical field of dyeing and finishing, and particularly discloses a biological blue dye, a dyeing solution as well as a preparation method and application thereof. The pyridone dye is mixed into the ornamental blue dye, the ornamental blue light is adjusted, the ornamental blue light shifts to the cyan light, and the red light effect is weakened, so that the problems of reddish color and insufficient dyeing depth after ornamental blue dyeing can be effectively solved, and along with the increase of the mixing proportion of the pyridone dye, higher color depth can be obtained under the same dyeing concentration and number of times, and the dyeing effect is improved. The dry and wet rubbing fastness of the dyed cloth is improved by 0.5 level.

The present invention provides a pretreatment solution that can improve the wash fastness of images formed on fabrics. [Solution] The pretreatment liquid of the present disclosure is a pretreatment liquid applied to a fabric in a region including the ink discharge region before discharging the ink containing a pigment, and is characterized in that it contains a resin, and the storage modulus (G') of the dried upper layer component after centrifugation is 95 kPa or less at 25°C and 47 kPa or less at 160°C.

The invention provides a preparation method of a lyocell and polyester interwoven fabric, which is characterized in that the preparation method comprises preparation and dyeing and finishing processes of a lyocell polyester fabric, and the dyeing and finishing processes comprise a lyocell anti-fibrillation treatment process, a polyester dyeing process and a lyocell dyeing treatment process; wherein the lyocell anti-fibrillation treatment process comprises the following steps: adding an anti-fibrillation aid KR-6347 according to 1%-4%, then adding anhydrous sodium sulphate, treating for 8-15 minutes, heating to 60-70 DEG C, adding 10-25 g / L sodium carbonate, continuing for 30-50 minutes, then cooling, draining water and cleaning. The lyocell terylene fabric is woven into knitted single jersey through knitting equipment in a yarn matching mode of separating lyocell terylene, separating lyocell and spandex. The fabric structure and the dyeing and finishing process are reasonable, the fibrillation degree of the fabric is greatly reduced through the dyeing and finishing process, the fastness to washing is high, and the breathable effect of the fabric is better under the wet condition after dyeing and finishing.

The invention discloses a high-comfort-degree pillowcase blended fabric, and particularly relates to the field of articles for daily use, the high-comfort-degree pillowcase blended fabric comprises an outer fabric layer, a middle spacing layer and an inner fabric layer, and the outer fabric layer and the inner fabric layer are connected through the middle spacing layer; and the outer fabric layer, the middle spacing layer and the inner fabric layer jointly form a three-dimensional spacer fabric with a multi-layer structure. According to the invention, through the multi-layer structure design, a three-dimensional pore structure is formed, air flow and heat dissipation are promoted, the moisture-permeable and air-permeable performance is excellent, and comfort and hygiene in the use process are ensured; the outer layer, making contact with the skin, of the cloth is made of cool fibers, the middle spacing layer achieves dynamic supporting and long-term shape stability through the composite design of a rigid framework and elastic driving, and the use comfort is remarkably improved; by means of the moisture and air permeability design of the pillowcase, the use experience is further improved, stuffiness and discomfort are avoided, and the air permeability, the moisture permeability, the cool feeling and the supporting performance are comprehensively improved in combination with the synergistic effect of specific fiber materials.

The invention relates to the technical field of thermal transfer printing ink, in particular to anti-migration high-stability thermal transfer printing ink as well as a preparation process and application thereof. The anti-migration high-stability heat transfer printing ink is obtained by uniformly mixing the water-based acrylic resin, the pigment, the defoaming agent, the flatting agent, the thickening agent and the epoxy modified organic silicon resin, then adding the modified hydrotalcite and the kaolin, and uniformly mixing. The anti-migration high-stability heat transfer printing ink is prepared from the following components in parts by weight: 80 to 100 parts of waterborne acrylic resin, 10 to 20 parts of epoxy modified organic silicon resin, 20 to 30 parts of pigment, 10 to 20 parts of modified hydrotalcite, 5 to 8 parts of kaolin, 1 to 3 parts of flatting agent, 2 to 4 parts of defoaming agent and 1 to 3 parts of thickening agent. The anti-migration high-stability thermal transfer printing ink prepared by the invention has relatively high adhesive force and relatively low mobility, and can be stably attached to the surface of a base material.

The invention relates to the technical field of ink, in particular to high-stability digital discharge printing ink-jet ink and a preparation process thereof. The high-stability digital discharge printing ink-jet ink is prepared from the following raw materials in parts by weight: 60-80 parts of a solvent, 10-20 parts of a discharge agent, 2-4 parts of filler, 1-3 parts of a humectant and 0.4-1 part of an active agent. According to the invention, sodium alginate is used as natural anionic polysaccharide, nano calcium carbonate in the filler can be wrapped through hydrogen bonds and electrostatic interaction by using hydroxyl and carboxyl contained in a molecular chain of sodium alginate to form composite structure microspheres, and Span 80 and paraffin can further modify the surface morphology of the microspheres by using hydrophobic interaction of Span 80 and paraffin; after the ink is dried, the composite structure microspheres can be combined with ink components, a continuous film is formed on the surface of a fabric, nano calcium carbonate and adsorbed pigment molecules are fixed, damage of external factors to pigments is isolated, the coloring life is prolonged, and therefore the stability of the digital discharge printing ink-jet ink is improved.

The invention relates to the technical field of high polymer materials, in particular to a color-spun superfine sea-island imitation sheepskin fabric and a production method thereof. The color-spun superfine sea-island imitation sheepskin fabric comprises the following raw materials in parts by weight: color-spun superfine sea-island fibers, conventional polyester filaments and a functional additive, the color spinning superfine sea-island fiber is formed by blending alkali-resistant color master batches and a sea-island base material, the mass ratio of an island component to a sea component in the sea-island base material is (5-7): (3-5), and raw materials of the island component and the sea component are polyethylene terephthalate and polyethylene respectively; the functional additive comprises an alkali-resistant stabilizer, a dyeing auxiliary agent and a softening agent. According to the invention, sodium citrate and KH-550 in the alkali-resistant stabilizer react at a constant temperature, sodium citrate is dissolved in the process and forms weak interaction with amino of KH-550 to enhance the stability of the system, and ether bonds of polyoxyethylene fatty acid and sulfonic groups of lauryl sodium sulfate in the dyeing auxiliary agent form a synergistic effect to enhance the emulsifying and wrapping capacity to grease and color paste.

The invention relates to the technical field of textile engineering, and discloses a cationic yarn-based antibacterial wear-resistant yarn-dyed fabric weaving process, which comprises the following steps of: selecting cationic yarns and double-six full-dull nylon yarns as raw materials; a seamless electronic jacquard knitting machine and a yarn feeding system are configured for knitting; stable conveying and accurate interweaving of yarns are controlled by setting the position of a yarn nozzle of a yarn feeding system and tension parameters; the knitted fabric is woven by adopting plain weave and darkness weave to form the knitted fabric with breathable micropores and double-color darkness patterns; dyeing the knitted double-color jacquard knitted fabric by adopting a low-temperature dyeing technology; the dyed fabric is subjected to online antibacterial and antistatic functional finishing; performing low-temperature short-time drying on the fabric subjected to functional finishing; carrying out hot melting, bonding and shaping on the dried fabric and the collar cloth; performing seamless laser cutting on the bonded and shaped access control button hole to obtain the overlock-free yarn-dyed fabric; and finally, carrying out quality detection on the yarn-dyed fabric subjected to laser thermal cutting.

A system for in-line treatment of thread for use with a thread consuming device is provided. The system comprises at least one treatment unit being configured to dispense one or more coating substances onto the at least one thread when activated and a thread speed sensor being driven by the motion of the at least one thread. A method is further provided.

The invention discloses a high-color-fastness washable polyethylene fabric and a preparation process thereof in the field of functional polymer materials. The high-color-fastness washable polyethylene fabric is prepared from the following raw materials: polyethylene resin, maleic anhydride-acrylic acid copolymer grafted polyethylene, dopamine-silane composite modified polyethylene, magnesium stearate and an antioxidant. Wherein the maleic anhydride-acrylic acid copolymer grafted polyethylene is prepared by copolymerizing maleic anhydride and acrylic acid and then blending and granulating with polyethylene, and carboxyl and acrylate groups are introduced to enhance the binding force with dye; the dopamine-silane composite modified polyethylene is prepared through polyethylene surface hydroxylation, dopamine self-polymerization modification and silane grafting reaction, and the acting force and hydrophobicity between fibers are doubly improved through a catechol group and an epoxy group. According to the prepared fabric, the color fastness and the washing resistance are remarkably improved, meanwhile, the original characteristics of light weight and chemical corrosion resistance of polyethylene are kept, and the application scene is expanded.

The invention discloses a wavy feathering method and system of a digital direct injection printer for flag cloth and electronic equipment, the method abandons a traditional gradual feathering mode, and adopts a wavy distorted feathering pattern, and the method comprises the following steps: firstly, analyzing the permeability characteristic of the cloth; according to the method, a two-way complementary template is finally generated by setting morphological parameters, creating an S-shaped fluctuation track, filling ink dots and leaving white space, so that adjacent PASS patterns can be occluded in an interlocking manner at a seam; and finally controlling the nozzle to spray ink according to the pattern. The system correspondingly comprises a pattern analysis module, a pattern generation module and a printing control module, through irregular ink dot distribution of wavy patterns, smooth gradual change is formed through natural permeation of ink, the contrast ratio of a feathering area and a non-feathering area is effectively reduced, accurate alignment of joints can be ensured through real-time error compensation, accordingly, PASS channels are eliminated, and the printing quality is improved. And the overall quality and the front and back color consistency of a flag cloth printing image are improved.

The invention relates to the field of leveling agents, in particular to a hand feeling type acidic leveling agent and a preparation method thereof. The preparation method comprises the following steps: firstly, amidating long-chain fatty acid of which the carbon atom number is greater than 10 and hydroxyethyl ethylenediamine, and then carrying out ring-opening addition on the amidated long-chain fatty acid and EO under the catalysis of AlMe3-NH4Cl or Me2AlNH2 to prepare a hydrophobic-hydrophilic block copolymer; the obtained leveling agent is high-concentration transparent liquid and is free of gel; the dyeing agent has excellent retarding property, migration property and dye dispersibility in dyeing of acid dyes such as chinlon, wool and the like, and can form a flexible lubricating film on the surface of a fiber, so that the problem that a fabric becomes hard after high-temperature setting is remarkably solved, and a softening agent after-finishing procedure is omitted.

The present invention relates to methods for making compounds of formula (I) including violacein, violacein analogues and derivatives thereof, and to compositions, cells, and fermentation liquids comprising the compounds resulting from these methods.

The invention relates to the technical field of textile double-sided printing, in particular to a high-permeability and double-sided positioning printing method for all-cotton towel products, which comprises the following steps: pre-treating all-cotton towel gray cloth, including desizing, scouring and bleaching procedures; padding the treated gray cloth in slurry containing urea, sodium bicarbonate, anhydrous sodium sulphate and a penetrant, and then drying and sizing; printing on the front surface of the towel by adopting a digital printing machine, and spraying a penetrating agent with the surface tension of 25-35mN / m to a printing area through an independent jet printing channel, so as to promote the dye to fully permeate to the back surface of the fabric and form a clear pattern outline; according to the invention, an image acquisition system composed of an industrial camera, an annular LED coaxial light source and a polarization filter captures fabric back pattern contour features in real time, and generates a translation, rotation and zooming transformation matrix based on an image registration algorithm; in combination with closed-loop feedback control of the digital printing machine, the positioning precision is improved by more than 75% compared with a traditional method.

The invention provides a reactive dye with a high fixation rate and a preparation method thereof. The reactive dye is prepared from the following raw materials in parts by mass: 25 parts of modified reactive dye, 0.3-0.7 part of a metal ion agent and 60-80 parts of water, wherein the modified reactive dye is obtained by inclusion of reactive dye molecules with beta-cyclodextrin-pyridine carboxylic acid, and beta-cyclodextrin and pyridine carboxylic acid in the beta-cyclodextrin-pyridine carboxylic acid are connected through an alkyl chain; metal ions provided by the metal ion agent can be chelated with the picolinic acid. Reactive dye molecules and beta-cyclodextrin-pyridine carboxylic acid form an inclusion structure, the hydrolysis probability of active groups is reduced, and an alkyl chain regulates steric hindrance and molecular spacing, so that pyridine nitrogen and carboxylic acid more efficiently form a more stable chelate with metal ions and further form coordinate bonds with hydroxyl groups on the fiber surface, and the fixation rate of the reactive dye is improved.

The invention provides a nylon fabric color fixing agent and a preparation method thereof, the color fixing agent comprises a bio-based compound and a nano barrier component, the bio-based color fixing component is a compound formed by quaternized chitosan, tannic acid and zirconium ions, and the nano barrier component is cellulose nanocrystalline-ZIF-8-coated SiO2 core-shell particles. The color fixing agent disclosed by the invention avoids the use of bisphenol compounds in the traditional color fixing process, and has the characteristic of environmental protection.

Provided are methods of continuously imparting a desired characteristic, optionally color, to a linear polymeric substrate with reliability and reproducibility. According to some aspects, a method of continuously bonding an active agent to or into a polymeric substrate may include contacting an active agent solution with a polymeric substrate. Contacting the active agent solution with the polymeric substrate may occur at a treatment temperature and for a treatment time. The active agent solution may have been prepared from a method including diluting the treated active agent precursor solution to form the active agent solution.

The invention discloses a super-soft air layer knitted fabric and a preparation method thereof, relates to the technical field of knitted fabrics, and solves the problems that the existing fabric is poor in softness and insufficient in comfort and durability. The fabric adopts a sixteen-path circulating pattern and is divided into an outer side layer, a middle gap layer, a close-fitting super-soft layer and a connecting layer, and each layer is formed by floating threads, looping and tuck stitches in a synergistic manner; modal fiber yarn and elastic core-spun yarn (spandex core yarn and lyocell fiber) are selected as yarn to be interwoven, and the spandex proportion (3%-10%), the lyocell fineness (0.5 dtex-1. 0 dtex) and the yarn proportion are designed according to functional layer differentiation. The preparation method comprises the steps of weaving, enzyme desizing-enzyme oxygen bleaching pretreatment, one-bath two-step dyeing and super-soft finishing, and hot air setting. Through collaborative optimization of the patterns, the yarns and the process, the outer side layer of the fabric is wear-resistant, the middle layer is breathable, the close-fitting layer is super-soft and high-elastic, and the fabric is stable in softness after being washed and meets the requirements of high-end close-fitting textile products.

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.