109results about How to "High color fastness" patented technology

The invention discloses a method for dying kevlar fabrics under ultrahigh temperature and high pressure, which comprises: a preprocessing procedure under the ultrahigh temperature and the high pressure and a dying procedure under the ultrahigh temperature and the high pressure, wherein in the preprocessing procedure under the ultrahigh temperature and the high pressure, atmospheric pressure plasmas are used to process the kevlar fabrics for 1-5min, the processing temperature is 100-150DEG C, while in the dying procedure under the ultrahigh temperature and the high pressure, the temperature is 160DEG C-190DEG C, and the pressure intensity is 0.8-0.9MPa, wherein the plasma preprocessing procedure is an important procedure before the dying procedure under the ultrahigh temperature and the high pressure, since the processing for the plasma produces a plurality of active groups on the kevlar fabrics, which enables carriers to be better absorbed on the kevlar baric and thereby is beneficial for dying dye on the kevlar fabrics, simultaneously, the kevlar fabrics after dying under the ultrahigh temperature and the high pressure has high fastness, fresh color and soft hand feeling, and the washing color fastness and the abrasion color fastness of the kevlar fabrics are improved better.

The invention relates to superfine fibre synthetic leather and the technical field of synthetic leather base cloth, in particular to superfine fibre synthetic leather with a superfine fibre weaving cloth as base cloth and a manufacturing method thereof. The invention takes island-typed superfine fibre weaving cloth as base cloth, the thickness of the fabricated superfine fibre weaving cloth synthetic leather is 0.05-2.0mm, the surface of which is provided with patterns of different shapes such as tabby or twill or jacquard weave or gingham or suede or film surface, the color is single or multiple, the leather has one or two or more layers which are combined by the weaving technology. The superfine fibre synthetic leather of the invention is comfortable to wear and cost-effective, thus being more suitable for manufacturing thin clothes or decorative cloth and the like.

The surface modifier for transfer printing with dispersive cotton fabric dye consists of bridging agent 10-40 wt%, pH regulator 0-5 wt%, modifier 0-5 wt%, swelling agent 5-30 wt%, and diluent for the rest. The present invention also discloses the cotton fabric pre-treating process before transfer printing with dispersive cotton fabric dye, and the process includes the first treating white cotton fabric with the surface modifier and the subsequent padding in solubilizer. The process is simple, and can result in printed fabric with bright color, high color fastness, good hand feeling, high hygroscopicity, high strength and no harm to human body.

The invention discloses a printing and dyeing auxiliary and a preparation method thereof and relates to the technical field of textile printing and dyeing. The printing and dyeing auxiliary comprises the following raw materials in parts by weight: 8-10 parts of guar gum, 15-17 parts of sodium dioctylsulfosuccinate, 4-6 parts of sodium sulfite, 4-10 parts of polyethylene glycol laurate, 5-7 parts of polyalkyl acrylate, 5-8 parts of sodium carboxymethyl cellulose, 9-11 parts of octadecyl dimethyl benzyl ammonium chloride and 6-9 parts of barium chloride. The printing and dyeing auxiliary disclosed by the invention has good efficacies of improving color fastness, protecting color and preventing color fading, simultaneously can reduce the consumption of dyes, is green, environment-friendly and nontoxic and reduces the cost, thereby having wide industrialization prospect and market value.

The invention discloses an environmental-friendly type foamless anti-staining detergent, a preparing method and an application thereof which includes a multipolymer and an alkaline-resisting chelated dispersion stabilizer efficiently without phosphorus. Each component has weight percentage as follows: multipolymer 40-70%, alkaline-resisting chelated dispersion stabilizer efficiently without phosphorus 5-10%, polyvinylpyrrolidone PVP-30 0-3%, polyvinylpyrrolidone PVP-15 0-2%, other water. The detergent is mainly used for cleaning treatment after dyeing or printing of fabric to remove floating color of fabric thoroughly, accordingly, can remove floating color, prevent staining and increase the fabric color fixing degree.

The invention relates to the technical field of anodizing processes, in particular to a ceramic anodizing process for a frosted glaze of aluminum alloy. The process includes the following steps of (1) machining of the aluminum alloy, (2) three-stage polishing, (3) sleeking, (4) racking, (5) cleaning, (6) drying, (7) sand blasting, (8) racking, (9) degreasing, (10) chemical polishing, (11) neutralization, (12) whitening, (13) neutralization, (14) ceramic anodizing, (15) dyeing and hole sealing, (16) drying, (17) C-angle highlighting, (18) racking, (19) degreasing, (20) neutralization, (21) ceramic anodizing, (22) dyeing and hole sealing, and (23) drying. The machined product is polished into a smooth surface similar to a mirror surface, so that basic requirements of the smooth glaze surface are met; then the matted or frosted effect is achieved through the sand blasting process, so that viewing angle requirements of customers are met; by means of the method that the basic brightness of the sand surface is improved through the chemical polishing principle, preparations are made for the frosted ceramic anodizing process; products with frosted and matted glazes are produced through the ceramic anodizing process, the color fastness of an oxidation film is improved, and the good functions of abrasion resistance, corrosion resistance and weather resistance are achieved.

A dyeing method of a linen yarn belongs to the technical field of textile fiber. The method comprises the following steps: reeling and wetting the yarn; dyeing; neutralizing with acid; performing ageing treatment; soaping; and performing softening treatment. The technical scheme is as follows: the method can ensure that a surface of the linen yarn is adequately dyed, and a core is not dyed, and ensure high color fastness, ideal chlorine bleach resistance, light resistance and soaping resistance of the linen yarn, thus a linen material woven by the linen yarn which is dyed by the method can have a jean style with worn feeling and obscurity, and the linen which is a colored woven fabric shows color and luster effects as colored spun fabric, which satisfies color and luster requirements of humans for fading colored woven fabric made of the linen yarn.

The invention discloses a dyeing processing method of a knitted denim fabric. The method is characterized in that the whole dyeing process specifically includes the steps of: knitting, pretreatment, pre-fixation, dyeing, dehydration, scotching, drying, color fixing and shaping. Through treatment of the knitted denim fabric with pre-fixation, dyeing, and color fixing and shaping three processes, the reduction process necessary to the traditional of sulfur dye is abandoned, the whole dyeing processing does not involve sulphide, simplifies and omits some necessary processes and a lot of environmentally-unfriendly chemical products required by the traditional process, the whole dyeing processing process is short and efficient, energy saving and environment-friendly, and the processed knitted denim fabric has rich and soft colors, stable cloth cover quality, novel and unique appearance, and has good visual and tactile affinity.

The invention discloses a one bath process dyeing process of polyester cotton dispersing dye and reactive dye. The one bath process dyeing process comprises the steps that a dyeing assistant, the dispersing/active dye and anhydrous sodium sulphate are sequentially added to a coagulating bath at the temperature of 40 DEG C to 50 DEG C, and then glacial acetic acid is added till the pH of the system reaches 4-6; the temperature is raised to 120 DEG C to 135 DEG C, the heating rate ranges from 1 DEG C/min to 1.5 DEG C/min, and the temperature is kept for 15 min to 50 min; then the temperature is reduced to 80 DEG C to 90 DEG C, treatment is carried out, and the bath ratio of the coagulating bath is 1:(10-60); the dispersing/active dye is prepared from, by weight, 0.5%-1.5% of dispersing dye and 0.5%-1.5% of reactive dye, the dispersing dye is selected from at least one of dispersing brownish yellow XF2, dispersing ruby XF2 and dispersing dark blue XF2, and the reactive dye is selected from at least one of active black G, active red C-D and active orange C-3R. The one bath process dyeing process has the advantages of being stable in color and firm in color fixation.

The invention provides an activated carbon printing coating or laminating fabric, which is characterized in that 2.5 layers or 3.5 layers of the fabrics are provided, and a preparation method of the activated carbon printing coating or laminating fabric comprises the steps of carrying out micro-porous coating or laminating treatment on the reverse side of a base fabric; and configuring raw material of a printing layer, and printing; the printing layer raw material comprise the following raw materials: polyurethane, a bridging agent containing activated carbon powder, N,N-dimethylformamide, methylbenzene and methyl ethyl ketone. The invention further provides the preparation method of the activated carbon printing coating or laminating fabric, and the prepared fabric is light, thin, soft, high in color fastness, and excellent in water proof and moisture permeable performances, and moisture absorption and quick drying performances.

The invention relates to a functional red microsphere which is characterized in that the functional red microsphere includes a cue ball and a shell coated on the cue ball; the cue ball is formed by the polymerization of the monomers selected as follows: divinylbenzene, allyl raethacrylate or glycidyl methacrylate; the dosage of the monomers is 6 portions by weight; perylene is used as a copolymer crosslinking agent and the dosage thereof is 0.05 to 0.4 portions by weight; the shell is the homopolymer of the glycidyl methacrylate; the surface of the shell is processed by acid quaternary ammonium salt. The materials of the reaction related in the invention are easier to be obtained; the product of the invention is not only easy to be treated cleanly, but also does not dissolve in a higher organic solvent. The diameter of the microsphere can achieve 10Mum; and the functional red microsphere can be used as electrophoresis.

The invention relates to environment-friendly loosely-knitted ultra-fine woolen-sweater-imitating fabric and a preparation method thereof. One side of the fabric imitates a woolen sweater, and the other side of the fabric adopts a napping structure; and the fabric adopting the napping structure is made of ultra-fine denier fibers, particularly biomass PDT ultra-fine denier fibers. The preparation method comprises the steps as follows: gray fabric inspection; fabric arrangement; end sewing; de-oiling and dyeing; adding of a hydrophilic pilling agent into a cylinder; dewatering; drying; slitting; brushing; carding; shearing; fleecing; finished product finalization; inspection; coiling; and packaging. According to the designed environment-friendly loosely-knitted ultra-fine woolen-sweater-imitating fabric, one side of the fabric adopts a structure similar to the woolen sweater, and the side has the excellent characteristics of softness, high resilience, light weight and the like; the other side of the fabric adopts a polar fleece structure, the suede is fluffy, and the good heat-insulation effect is achieved; and large-scale production can be conducted through existing equipment, so that the economic benefit and the social benefit are increased.

The invention discloses a dyeing process for anti-radiation polyester wool tops. The dyeing process comprises the following steps: 1), adding the following ingredients into a dye vat in parts by weight: 0.8 part of hydantoin, 1.5 parts of dialkyl sodium phenate, 33 parts of water, 2.2 parts of ethyltriethoxysilane, 1.6 parts of sodium dihydrogen phosphate, 14 parts of natural plant pigment, 1.2 parts of polyethylene glycol and 2.3 parts of sodium n-butyl naphthalene sulfonate, and uniformly stirring; 2), soaking the wool tops in the dye vat for 65 minutes; 3), drying the soaked wool tops at 40 DEG C; 4), immersing the dried wool tops into clean water for rinsing g for 20 minutes; 5), taking out the rinsed wool tops and naturally drying. With the adoption of the dyeing process for the anti-radiation polyester wool tops, disclosed by the invention, the color fastness of the dyed wool tops is high, the dying uniformity is good and dyeing defects do not exist.

The invention relates to a process of performing fixation on a reactive dyed cotton fabric with a reactive cationic color fixing agent. Reactive dyes are finite in fixation quantity and poor in washability when being used for dyeing fabrics with deep colors, so that the dyeing fastness is unqualified, and the color fixing agent is needed for improving the dyeing fastness. The take-up ratio of a padder is set as 85%-95%; an aqueous solution of the reactive cationic color fixing agent with the concentration of 15g/L-25g/L is prepared, wherein the reactive cationic color fixing agent is epoxy cationic polymer P (DMDAAC (Diallyl Dimethyl Ammonium Chloride)-AGE (Allyl Glycidyl Ether)); a process of padding is carried out by dipping for twice and rolling for twice; the fabric is dried at 80 DEG C, subsequently baked at 110-130 DEG C for 3-8 minutes, then washed and dried. The reactive cationic color fixing agent is applied to fixation of the cotton fabric, and the fabric with color fixed by the padding method has the characteristics that the soaping and fading fastness reaches grade IV-V, the staining fastness reaches grade V, the dry rubbing fastness reaches grade IV, the wet rubbing fastness reaches grade III-IV, the pressing-ironing fastness reaches grade IV-V, and the value of K/S is 3.85. The reactive cationic color fixing agent is capable of effectively improving various color fastnesses and K/S values of the dyed cotton fabric.

The invention relates to normal temperature and pressure dyeable polyester carpet yarn belonging to the technical field of carpet yarn. The invention is characterized that the normal temperature and pressure dyeable polyester carpet yarn is prepared by twisting 300D modified polyester texturing filaments or 200D modified polyester texturing filaments, adopts a first technical scheme by once doubling two 300D modified polyester texturing filaments into one, twisting S, twice doubling two pieces of twisted yarn into one and twisting Z, a second technical scheme by once doubling four 300D modified polyester texturing filaments into one, twisting S, twice doubling two pieces of twisted yarn into one and twisting Z, and a third technical scheme by once doubling two 200D modified polyester texturing filaments into one, twisting S, twice doubling two pieces of twisted yarn into one and twisting Z. The invention can dye at normal temperature and pressure so as to save energy consumption; high dye utilization rate and color fastness are achieved; and a textured carpet has soft foot feeling and good crease resistance.

The invention discloses a formaldehyde-free color fixing agent and a preparation method thereof. The method comprises the following steps: heating maleic anhydride until the maleic anhydride is melted, and adding cationic monomers, an unsaturated organic acid, a catalyst and water into the molten liquid so as to obtain a mixed liquid; dropwise adding an initiator into the mixed liquid, so that the mixed liquid has an addition reaction; and carrying out cooling treatment on the obtained product so as to obtain an cationic formaldehyde-free color fixing agent. According to the invention, the solubility of water-soluble dyes is reduced by introducing the cationic monomers, and the fixation fastness of the color fixing agent on the surface of fibers is improved by using the esterification crosslinking capacity and macromolecular surface film forming capacity of polymer and cellulose fiber molecules, thereby improving the color fastness of water-soluble dyes. According to the invention, defects in existing formaldehyde-free color fixing agent technologies are overcome, and a formaldehyde-free and environment-friendly color fixing agent with a good color fixing effect is obtained.

The invention relates to the technical field of anodic oxidation processes, in particular to an aluminum alloy mirror surface glazed ceramic anodic oxidation process. The aluminum alloy mirror surface glazed ceramic anodic oxidation process includes the following steps: (1) an aluminum alloy is machined; (2) three-section polishing is carried out; (3) light removing is carried out; (4) upward hanging is carried out; (5) washing is carried out; (6) drying is carried out; (7) score-free chamfering is carried out; (8) upward hanging is carried out; (9) degreasing is carried out; (10) white passivation is performed; (11) neutralization is carried out; (12) ceramic anode oxidization is carried out; (13) dyeing and hole sealing are carried out; and (14) drying is carried out. A physical three-section finishing polishing mode is adopted, a machined product is polished into a mirror surface, and the requirement for the high mirror surface is met; meanwhile, chamfering is performed with the assistance of a score-free chamfering tool, and the requirement of a client for the visual angle is met; the method that polishing material lines are covered on the basis of the principle of chemical white passivation is adopted, and guarantees are provided for the follow-up ceramic anode; and finally the ceramic anodic oxidation process is used for producing high-glaze products, the colors can be high-glaze ceramic white or other colors according to the requirement of the user, dyeing and sealing are unified, the color fastness of an oxidation film layer is improved, and the oxidation film layer has good wear resistance, good corrosion resistance and good weather-proofness the using process.

The invention relates to the technical field of dyeing, in particular to a tencel and linen-cotton blended fiber dyeing method. The method comprises the steps that pretreatment is conducted, wherein blended fibers and water are added into a dye vat, hydrogen peroxide, SD-1 and sodium silicate are added, the temperature is increased to 98 DEG C, and heat preservation is conducted for 60 min; the temperature is decreased to 30 DEG C, a deoxidizing enzyme is added, and dyeing is conducted after heat preservation is conducted for 20 min; auxiliaries and dye are added, heat preservation is conducted for 10 min, the temperature is increased to 50 DEG C, and heat preservation is conducted for 15 min; 1/10 of anhydrous sodium sulphate is added, heat preservation is conducted for 10 min, 3/10 of anhydrous sodium sulphate is added, heat preservation is conducted for 10 min, 6/10 of anhydrous sodium sulphate is added, and heat preservation is conducted for 10 min; the temperature is increased to 60 DEG C, heat preservation is conducted for 15 min, 1/10 of sodium carbonate is added, heat preservation is conducted for 10 min, 3/10 of sodium carbonate is added, heat preservation is conducted for 10 min, 6/10 of sodium carbonate is added, and heat preservation is conducted for 10 min; washing is conducted to be clean, the temperature is decreased to 30 DEG C, glacial acetic acid is added, heat preservation is conducted for 10 min, a soaping agent is added, the temperature is rapidly increased to 80 DEG C, heat preservation is conducted for 10 min, washing is conducted to be clean, the temperature is cooled to 30 DEG C, a softening agent is added, the temperature is increased to 40 DEG C, heat preservation is conducted for 20 min, and the product is taken out of the dye vat. According to the tencel and linen-cotton blended fiber dyeing method, color fastness can be effectively improved, and dyeing defects are not prone to occur.

The invention discloses a production process of a nylon and cotton blended fabric. The production process comprises the steps of spinning, grey fabric weaving, desizing, dyeing, fixation, and afterfish setting. According to the fabric provided by the invention, cotton and nylon are combined, and the shortcomings of both cotton and nylon are overcome, so that the fabric has lasting water absorption and sweating capabilities, and is good in color fastness, high in strength and resistant to abrasion; in addition, nylon has a flame-retardant function.

The invention provides a production method of polyimide colored silk. The production method comprises the following steps: (1) blending color paste; (2) synthesizing light-color polyimide; (3) preparing newly spun silk with the polyamic acid under dry spinning technological conditions; (4) preparing colored polyimide fibers from the newly spun silk through cyclizing and drafting. The invention states a production technology for producing the polyimide color silk under dry-method technological skills. The production technology disclosed by the invention adopts dope dyeing, compared with a dyeing technology, the dope dyeing has the advantage of high color fastness, and besides, the method is simple in technology and low in production cost; influence on environment is small, and waste water, waste gas and the like are hardly generated; the produced polyimide color silk can be used for protective clothes of different purposes such as military and civil uses.

The invention provides a process for printing and dyeing a wool fabric. The process comprises the following steps of: a preparation procedure, washing, an ionic liquid pretreatment process, a printing and dyeing process, an aging process, an after treatment process, and obtaining of the finished product. The process for printing and dyeing a wool fabric provided by the present invention effectively increases the dye-uptake of the wool fabric by means of the pretreatment using the ionic liquid to the wool fabric; secondly, a reactive dye is used in the printing and dyeing process herein, and an acid-releasing agent is added to effectively regulate the pH value in the dyeing process such that the dye is uniformly attached on the fabric. The process for printing and dyeing the wool fabric provided by the present invention is safe and non-toxic, and further is capable of improving the color fastness, reducing the dyeing bath ratio and reducing the dosages of the dye and printing and dyeing auxiliaries. Furthermore, the process is simple, obvious in beneficial effects, and suitable for popularization and use.

The invention provides nano waterproof, oil-proof and antifouling finishing liquid which comprises a waterproof, oil-proof and antifouling fluorine-containing finishing agent and nano ceramic powder dispersion liquid. According to the invention, fabric has an excellent nano waterproof, oil-proof and antifouling function; after multiple times of washing, the nano waterproof, oil-proof and antifouling effect of the fabric is maintained well; moreover, the color fastness is high, and the air permeability and moisture permeability of the fabric are perfect; and after the finishing, the breaking strength of the fabric is not obviously reduced.

The invention discloses ink-jet ink and application thereof.The ink-jet ink is prepared from, by mass, 3.0%-25.0% of organic dye, 1.0%-2.0% of a surfactant, 0.1%-1.0% of a color fixing agent, 10.0%-20.0% of humectant, 1.0%-10.0% of alkali, 0.1%-0.5% of an antibacterial agent and the balance deionized water, wherein the pH is 7.0-8.0.The ink-jet ink is applied to cellulosic fiber inkjet printing, and a fabric can be directly printed without being starched; the printing fluency is good, the color fastness rate is high, the ink storage stability is good, and wastewater is easy to treat.

The invention discloses a dyeing and finishing method for a flax and rayon elastic interwoven fabric. The fabric is formed by interweaving warp and weft. The warp is formed by blending flax fibers, rayon fibers and spandex fibers. The weft is formed by blending flax fibers and rayon fibers. The dyeing and finishing method for the flax and rayon elastic interwoven fabric includes the following steps of S1, pretreatment; S2, dyeing; S3, printing; S4, after-finishing. According to the dyeing and finishing method for the flax and rayon elastic interwoven fabric, the method is simple, quality is stable, and the advantages that the hand feeling of the fabric is soft, a dyed cloth cover is full and uniform, color fastness is high, the color is uniform and transparent, and the fabric is rich in elasticity are achieved.

The invention discloses a flat screen printing technology. The flat screen printing technology comprises three steps including pre-preparation, decorative pattern printing and post-treatment, whereinthe pre-preparation step comprises two procedures of pulping and platemaking; in the platemaking procedure, the mesh number of a printing plate silk screen is 360 meshes; when a decorative pattern isprinted, printing plates are sorted according to the sequence from deep to shallow; then a magnetic rod of a printing machine is changed into a magnetic rod with the diameter of 13mm and parameters ofa printing scraping knife are subjected to optimized design; the post-treatment comprises three processes including pre-drying, steaming and water washing; the printing plate silk screen, the printing scraping knife and drying and color fixing parameters of the post-treatment are subjected to the optimized design and decorative patterns, which are clear and have high color fastness and uniform colors can be printed on a clothing fabric; the problems in a printing process that the decorative pattern is blurry, the outline is not clear, the color fastness of the decorative pattern is low and the colors are not uniform can be avoided.

The invention discloses a dyeing method of an indigo dye and an indigo yarn. The dyeing method specifically comprises the following steps: boiling off; steaming; modifying; dyeing; nitrogen treatment;first washing; second washing; color fastness improver treatment; first drying; third washing; drying; and winding. The method disclosed by the invention only needs one dyeing treatment, and the dyeing cycle index is greatly reduced on the premise of ensuring the color fastness.

The invention provides a tea dyeing method of native cloth. The tea dyeing method of native cloth comprises the following steps: 1. preparing tea dyeing liquid, namely, boiling tea leaves and water in a pot for 30-40min, and filtering to obtain the tea dyeing liquid; 2. performing pretreatment, namely, soaking native cloth into soybean milk for 30-40min; 3. performing tea dyeing for the first time; 4. preparing mordanting liquid, namely, preparing mordanting liquid from white alum and water; 5. performing mordanting, namely, placing the native cloth subjected to tea dyeing for the first time into the mordanting liquid for mordanting; 6. carrying out tea dyeing for the second time, namely taking out the mordanted native cloth, squeezing out water, placing into the tea dyeing liquid, adding table salt and boiling for 30-40min; and 7. rinsing and drying in air. According to the tea dyeing method of native cloth, the native cloth is pretreated by soybean milk before being dyed, so that protein is attached to the native cloth and the native cloth is easy to color, white alum water is used as a mordanting agent for fixing color of the native cloth subjected to tea drying for the first time, table salt is added during tea dyeing for the second time for further color fixation, and the final native cloth subjected to tea dyeing has a good coloring effect and high color fastness.

The invention discloses a pretreatment, modification and dyeing one-bath one-step processing method for a cotton fabric. The cotton woven fabric is ultrasonically treated in a treatment solution composed of an alkali dye, a refining agent, hydrogen peroxide, a modifier and a neutral fixing reactive dye to complete desizing, scouring, bleaching, cationic modification and dyeing of the cotton wovenfabric, so the pretreatment, modification and reactive dyeing of the cotton woven fabric are completed in one bath, and the reactive dyeing has an excellent dyeing fastness without adding a salt. Themethod realizes the pretreatment (desizing, scouring and bleaching), cation modification and dyeing one-bath one-step processing of the cotton fabric, so the time is saved, the production efficiency is improved, and the obtained dyed cotton woven fabric has an excellent dyeing fastness.

The present invention relates to a preparation method of dope-dyed cotton linter composite filament. The method comprises the steps of: 1) preparing a dye stock solution by dissolving a reactive dye in water to prepare a dye stock solution with reactive dye concentration of 20-40wt%; 2) preparing a spinning solution by adding the dye stock solution to a dispersion liquid of cotton linters, wherein the dispersion liquid of cotton linters is an aqueous solution of carboxymethyl chitosan, and the addition amount of the dye stock solution is 1-3.5wt% of the dispersion liquid of cotton linters calculated by the weight of the active dye; stirring uniformly and heating to 65-85 DEG C to obtain the dope-dyed spinning solution; 3) preparing a coagulating bath by dissolving citric acid and lemon sodium in water to prepare the coagulating bath, wherein the concentration of the citric acid in the coagulating bath is 35-45g / l, and the concentration of sodium citrate is 0.8-1.2g / l; and raising the temperature of the coagulating bath to the same temperature of the spinning solution; and 4) using the coagulating bath to conduct spinning on the spinning solution by a conventional method. The composite filament provided in the invention has high color fastness and high utilization rate of reactive dye.

The invention provides a dyeing and printing auxiliary agent containing sodium carboxymethyl cellulose. The dyeing and printing auxiliary agent is prepared from the following raw materials in parts by weight: 6 to 8 parts of guar gum, 13 to 15 parts of polyethylene glycol laurate, 8 to 10 parts of polyalkyl acrylate, 12 to 13 parts of the sodium carboxymethyl cellulose, 8 to 10 parts of sodium dodecyl sulfonate, 7 to 8 parts of polyalkyl acrylate, 9 to 10 parts of stearyl dimethylbenzyl ammonium chloride, 6 to 7 parts of fatty alcohol, 5 to 7 parts of ethylene oxide, 2 to 3 parts of acetic acid and 9 to 24 parts of barium chloride. Compared with the prior art, the dyeing and printing auxiliary agent has the beneficial benefits that the dyeing and printing auxiliary agent has good effects of improving the color fastness, protecting color and preventing fading; meanwhile, the utilization amount of dyestuff can be reduced; the dyeing and printing auxiliary agent is green, environment-friendly and non-toxic, and the cost is reduced, so that the dyeing and printing auxiliary agent has wide industrial prospect and wide market value.