18 results about "Dye uptake" patented technology

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

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

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

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

The invention discloses a 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 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.

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

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

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

This invention belongs to the field of natural plant dyeing technology for textiles, and discloses a method for natural dyeing and composite tie-dyeing color fixing of textiles based on Ningxia red goji berry pulp. This method uses cold-pressed pulp from fresh Ningxia red goji berries as the core dye. The dyeing process involves core steps including goji berry pulp extraction, fabric modification pretreatment, goji berry pulp dye liquor preparation, constant temperature dyeing, composite mordant color fixing, and color-locking and setting. Fabric pre-modification is achieved through a compound of alum and chitosan, combined with a formaldehyde-free cationic fixing agent to construct a composite mordant system. Low-temperature dyeing and baking setting processes are then used to create a three-dimensional cross-linked structure of dye, fiber, and mordant. This method is entirely free of harmful chemical reagents, improving dye uptake and color fastness. The finished product has a rich color and is suitable for various textiles such as cotton, linen, silk, and wool. The color fastness to washing and rubbing reaches level 4 or higher, and the color fastness to sunlight reaches level 3 or higher.

This invention discloses a high-strength, protective low-temperature dyeing method for wool based on guanidine salt removal of wool lipids, belonging to the application technology field of wool dyeing and finishing in the wool textile industry. Addressing the problems of significant fiber structure damage and strength reduction in existing high-temperature wool dyeing processes, and the limitations of existing low-temperature dyeing technologies in industrial application and poor dark-color dyeing effects, this invention employs a PHMB / SPHMB, sodium carbonate, and sodium sulfate composite system to degrease wool, followed by washing and low-temperature dyeing with wool reactive dyes. This invention can achieve low-temperature dyeing of wool at 70-75℃, with a maximum dye uptake of 99.12%, and the dyeing effect is superior to conventional boiling dyeing processes. The treated wool fibers retain their strength without loss and even show a slight increase, while also imparting excellent antibacterial properties. The process is short, energy-efficient, environmentally friendly, and suitable for industrial production needs.

The invention relates to a printing and dyeing auxiliary agent and a dyeing method thereof. The printing and dyeing auxiliary agent is prepared from the following raw materials in parts by weight: 96 to 98 parts of anhydrous sodium sulphate, 1.2 to 1.8 parts of multifunctional dispersing agent DM-1501, 0.8 to 1.2 parts of 8-hydroxy-2-methylquinolyl Gemini surfactant and 0.3 to 0.7 part of alkyl glycoside. The preparation raw materials of the 8-hydroxy-2-methyl quinolyl Gemini surface active agent comprise 8-hydroxy-2-methyl quinoline and sulfonic acid ester. The printing and dyeing auxiliary agent can improve the dyeing uniformity and color fastness of cotton cakes. The K / S value of the dyed cotton cake is gt; 26.5, the dye uptake rate gt; the color fastness to wet rubbing is gt; grade 3, the color fastness to washing is gt; and grade 4.

This invention belongs to the field of eco-friendly dyeing and printing technology, and discloses a cationic dye reverse micelle emulsion and its application in acrylic yarn dyeing. The cationic dye reverse micelle emulsion comprises a cationic dye solution and fatty acids, wherein the fatty acids are at least one of C16-C18 fatty acids or fatty acids obtained from the hydrolysis of (waste) edible oils. When this cationic dye reverse micelle emulsion is used for dyeing acrylic yarn, no additional acid-base buffer system or synthetic retarder is required. Dyeing is completed under normal pressure, significantly reducing dyeing water and colored wastewater discharge. It also effectively improves the dye uptake rate and color depth of the finished product in the dyeing of dark acrylic yarn, reduces the bulkiness of the finished acrylic yarn, and increases the strength of the acrylic yarn.

The invention discloses an amide cyanine dye as well as an efficient synthesis method and fluorescence imaging application thereof, and belongs to the technical fields of fluorescent dye synthesis, fluorescence imaging and biosensing. Compared with a traditional cyanine dye synthesis method, the amide cyanine dye synthesis method is simple, few in by-products, short in reaction time, high in yield, stable in structure and high in universality, the absorption and emission wavelength of the amide cyanine dye can be expanded from a short-wave near-infrared region to a near-infrared second-region wave band by increasing the length of a conjugated chain, and the absorption and emission wavelength of the amide cyanine dye can be expanded from a short-wave near-infrared region to a near-infrared second-region wave band. Experiments prove that the amide cyanine dye has good photophysical properties and biological fluorescence imaging potential, and can be applied to the aspects of biological recognition imaging, super-resolution fluorescence imaging of cellular mitochondria, protein labeling, specific recognition of antibodies, nucleic acid labeling, DNA sequencing, tumor photodynamic therapy and the like. Based on the advantages, the amide cyanine dye disclosed by the invention has a good application prospect in the field of biological fluorescence imaging research.

This invention relates to the field of cationic modifiers and discloses a cationic modifier for cellulose fibers and its preparation method, comprising the following steps: mixing methacryloyloxyethyltrimethylammonium chloride, acrylamide, glycidyl methacrylate, a modifier, an initiator, and deionized water, stirring until homogeneous, to obtain a mixture; stirring the mixture to react, cooling to room temperature, adding ethanol, collecting the white precipitate by vacuum filtration, washing and drying the white precipitate to obtain the cationic modifier for cellulose fibers. The cationic modifier for cellulose fibers formed by methacryloyloxyethyltrimethylammonium chloride, acrylamide, glycidyl methacrylate, and the modifier can penetrate into the fiber interior, resulting in a uniform distribution of cationic groups on the fiber surface, thereby improving the dye uptake and fixation rate of subsequent dyes.

The invention relates to the technical field of dyeing, in particular to a pre-color-fixing device for colored spun fiber strips, a dyeing system and a using method. A front color fixing device for a color spinning fiber rod comprises a drying and color fixing box, a color fixing device and a color fixing device, the steam generation assembly is arranged in the containing space and comprises a water tank and a supporting plate, saturated steam is generated in the water tank, the supporting plate is connected with the water tank, a fiber net is placed on the supporting plate, a plurality of vent holes are formed in the supporting plate, and dye to be fixed is attached to the fiber net. The invention provides a pre-color-fixing device, a dyeing system and a use method of a color-spun fiber rod, aiming at solving the problems of low dye utilization rate, light color of prepared textiles and low color fastness caused by the fact that dye liquor is attached to the surfaces of fibers and is insufficiently reacted with the fibers after being dried by a follow-up prolonged fiber net, realizing high dye uptake and high color-fixing rate, and improving the quality of the textiles. Meanwhile, the technological process is shortened, and consumption of water and chemical auxiliaries is reduced.

The invention discloses a preparation method of a chinlon 66 / cotton blended printed fabric. The preparation method of the chinlon 66 / cotton blended printed fabric comprises the following steps: 1) pretreating the fabric by adopting a desizing-scouring-bleaching one-bath method, and performing high-temperature pre-shaping; (2) printing the fabric treated in the step (1); wherein the printing paste for printing is a mixture of printing paste, paint, a paint printing synergist, an adhesive, urea, ammonium sulfate, vat dye and acid dye; (3) baking the fabric printed in the step (2) at high temperature; (4) firstly ageing the fabric printed in the step (3), and then carrying out reduction ageing; 5, the fabric aged in the step 4 is sequentially subjected to water washing, oxidation, soaping and secondary water washing, and then the chinlon 66 / cotton blended printed fabric is obtained.The printed product is uniform in color, clear in pattern outline, quite excellent in color fastness, high in dye uptake, capable of improving the rubbing color fastness and the soaping color fastness and capable of enhancing washing fastness.

A supercritical carbon dioxide fluid dyeing method with a high dye-uptake of disperse dyes is provided, when using disperse dyes to dye polyester fiber or products thereof, adding a co-solvent capable of increasing the dissolution rate and solubility of the disperse dye in the supercritical carbon dioxide fluid into the dyeing system, wherein the solubility of the co-solvent in the supercritical carbon dioxide fluid is higher than that of said disperse dye, and in the dyeing system, the intermolecular interaction between each substance meets the requirement of: the intermolecular interaction between the co-solvent and the supercritical carbon dioxide fluid > the intermolecular interaction between the co-solvent and said disperse dye > the intermolecular interaction between the supercritical carbon dioxide fluid and said disperse dye; wherein the co-solvent is solid at a separation temperature of 30-50 °C and a separation pressure of 5-6 MPa; the co-solvent used in the present invention can significantly improve the dye-uptake of disperse dyes on polyester fibers, and can also be separated from CO2 and reuse CO2.