6 results about "Dye uptake" patented technology

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.

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.

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.