14 results about "Ring dyeing" patented technology

A method of ring dyeing a yarn includes the step of providing a cellulosic yarn selected from a free end yarn and a ring spun yarn. The yarn is immersed in only one sulfur dye box, and the sulfur concentration in the sulfur dye box is 1 g / L to 50 g / L. And taking out the yarns from the sulfur dye box, and airing for less than 30 seconds. The yarn is aired and then rinsed in water. The yarn is dyed in indigo dye bath, and the pH of the indigo dye bath is kept at 10.8 and 12.8. The yarn is taken out of the indigo dye box and then aired.

The invention provides a wastewater circulating dyeing process for high-elasticity dyed cloth, which comprises the following steps: in a fiber pre-activation treatment step, performing puffing treatment on gray fabric through supercritical CO2 microbubbles in a supercritical dyeing machine, so as to form a nano-scale pore structure in the interior of the fiber of the gray fabric; transferring the bulked gray fabric into a treating fluid to perform grafting modification on the fiber surface of the gray fabric so as to form a positive charge layer; in the directional wastewater regeneration step, treating liquid waste liquid is collected, filtered through a ceramic membrane ultrafiltration unit, then subjected to electrodialysis through bipolar membrane electrodialysis equipment and recycled to obtain a cationic modifier, cellulase is added into the recycled cationic modifier for enzymolysis, and regenerated treating liquid containing glucose and the cationic modifier is obtained; in the dynamic circulating dyeing step, a dynamic pressure dyeing machine infiltrates regeneration treatment liquid into a pore structure in the grafted and modified gray fabric fiber, so that a nano cross-linked network structure is formed in the interior and on the surface of the gray fabric fiber.

An aqueous polyelectrolyte composition for (pre) treating textile materials, its preparation and use and textiles produced therefrom, such as denim textiles. It was found that textile materials pretreated with the aqueous polyelectrolyte composition have improved performance in subsequent steps, such as in mercerization or dyeing, because the subsequent steps are more superficial on the pretreated textile materials. This allows for, for example, ring dyeing of pre-treated textile materials, and thus allows for a more sustainable technique.

The invention relates to the technical field of textile dyeing and finishing, and relates to a chemical modification method of a cotton fabric, in particular to an amination modification method of the cotton fabric and a salt-free neutral dyeing process of the cotton fabric. The method comprises the following steps: S1, reacting a cotton fabric with an epoxy halide shown as a formula I in the presence of first alkali liquor to obtain an epoxidized cotton fabric; in the compound in the formula I, X is Cl, Br or I; n is an integer of 1-3; s2, the epoxidized cotton fabric and an organic amine reagent are subjected to a ring-opening reaction in the presence of second alkali liquor, and the amination modified cotton fabric is obtained. The technical contradictions that dyeing is uneven (dyeing defect and ring dyeing) due to large molecular weight and poor permeability of a high-molecular modifier and the modification effect is limited and the deep dyeing requirement cannot be met due to single reaction site and low fiber combination efficiency of a small-molecular modifier are solved.

This invention relates to the field of dyeing and finishing technology, and discloses a low-temperature cyclic dyeing method for polylactic acid (PLA) fibers, comprising: 1) modifying curcumin with 12-bromo-1-dodecanool to obtain modified curcumin dye; 2) preparing a pre-emulsion using a eutectic solvent composed of coumarin and thymol and an emulsifier, and then modifying the PLA fibers; 3) low-temperature cyclic dyeing. This invention uses long-alkyl-linked curcumin for modification, which improves its hydrophobic compatibility and fixation stability, enhancing its diffusion and fixation ability in PLA fibers; and uses coumarin / thymol for surface modification of PLA fibers, which improves its surface affinity and dyeability without damaging the fiber's structure and mechanical properties. The combination of these two methods enables PLA fibers to achieve efficient dyeing under low-temperature and normal-pressure conditions, and can be combined with a low-temperature cyclic dyeing process to obtain high dye depth and excellent color fastness, thereby achieving the goals of energy saving, emission reduction, and recyclability in green dyeing and finishing.

This invention relates to an aqueous polymer electrolyte composition for (pre)treating textile materials, its preparation and use, and textile products manufactured therefrom, such as denim textiles. It has been found that textile materials pretreated with this aqueous polymer electrolyte composition have improved properties with respect to subsequent processes, such as mercerization or dyeing, because these subsequent processes are more superficial than those applied to pretreated textile materials. This enables, for example, ring dyeing of pretreated textile materials, and consequently, a more sustainable technology.

A method of ring dyeing a yarn includes a series of steps including providing a yarn selected from a free end yarn and a ring spun yarn. The yarn is immersed in a caustic bath having a caustic concentration of 50 g / L to 175 g / L for 7 to 40 seconds. And taking out the yarns from the caustic alkali bath, and airing. And after airing, rinsing the yarns in water. The yarn is selected from one of a free end yarn and a ring spun yarn, and when the yarn is a free end yarn and a ring spun yarn, the yarn is dyed in only one sulfur dye box, or when the yarn is a free end yarn, the yarn is dyed in at least one indigo dye box. After the dyeing step, the yarn is washed in water, after which the dyed yarn is dried.

The application relates to a clamping device of an electrochemical aluminum ring dyeing equipment, which comprises a rack, a connecting plate, a connecting piece connected to the connecting plate, an electrochemical aluminum ring connected to the connecting plate through the connecting piece, a lifting piece connected to the rack, and a first motor connected to the lifting piece. When the electrochemical aluminum ring is immersed in a dyeing solution, the first motor drives the connecting plate to rotate, so that the electrochemical aluminum ring is fully dyed, and the dyeing efficiency of the electrochemical aluminum ring is improved.

The invention relates to the related technical field of printing and dyeing wastewater treatment, in particular to a bath-process printing and dyeing wastewater circulating dyeing device and a process thereof.The bath-process printing and dyeing wastewater circulating dyeing device comprises a treatment tank, a stirring shaft, a high-density-mesh filter screen plate, a residue collecting pipeline and a treated water collecting groove, the treatment tank is positioned on an equipment base through supporting legs, and a mounting frame is fixedly connected to the side wall of an inner cavity of the treatment tank; a wastewater inlet is formed in the position, close to the lower side, of the side wall of the treatment tank, a primary treatment water outlet is formed in the position, close to the upper side, of the side wall of the treatment tank, the bottom of the treatment tank is in a hopper shape, and a slag discharging pipeline is integrally formed in a lower side port of the treatment tank; by arranging the bath printing and dyeing wastewater circulating dyeing device formed by combining the treatment tank, the stirring shaft, the high-density mesh filter screen plate, the slag collecting pipeline and the treated water collecting tank, water treated by a flocculating agent is discharged from bottom to top, so that the replacement and maintenance time of the high-density mesh filter screen plate is prolonged under the action of gravity, and the cost is reduced. Therefore, the maintenance time of the equipment is effectively reduced.

Methods for obtaining indigo dyed yarns with controlled ring dyeing are provided. Systems and devices for yarn indigo dyeing resulting in dyed yarns with homogenous color intensity are also provided.

A method for obtaining indigo-dyed yarn with controlled ring dyeing is provided. A system and apparatus for indigo dyeing yarn are also provided, which produce dyed yarn with uniform color intensity.

The utility model provides a multifunctional integrated dyeing device which comprises a dyeing box, the interior of the dyeing box is hollow, feeding and discharging grooves are symmetrically formed in the two sides of the dyeing box, a plurality of guide rollers are rotationally connected into the dyeing box, and cloth is arranged on the surfaces of the guide rollers; the cloth pressing mechanism is arranged on one side of the dyeing box and used for pressing the cloth; the circular dyeing mechanism is provided with a drying mechanism, cloth enters a dyeing box, the cloth is guided through a guide roller, the cloth passes through a dyeing cavity, dyeing treatment is conducted on the cloth through a dyeing agent in the dyeing cavity, and the dyed cloth moves upwards in an inclined mode and penetrates through a through groove; the upper side and the lower side of the cloth are heated and dried under the action of the heating pipes, after drying is completed, the cloth penetrates out of the other side of the dyeing box and is wound, color difference caused by non-drying and winding is avoided, and use is convenient.

The invention relates to the technical field of textile dyeing and finishing, and discloses a cloth circulating dyeing process based on dye liquor online regeneration, which comprises the following steps: firstly, preparing a dyeing working solution containing a core and shell structure block copolymer, and wrapping a core load in a hydrophobic core of the copolymer; immersing a fabric to be dyed into the working solution, heating, and promoting the core load to be released from the core and dye the fabric by triggering the morphological change of the copolymer, so as to obtain the used dye solution; the used dye liquor is subjected to in-situ regeneration treatment through an online system, then a concentrated solution is supplemented according to an online monitoring result, and finally the rebalance working solution capable of being used for follow-up batch circular dyeing is obtained. The pH response unit and the photocatalysis unit are integrated on the same polymer carrier, so that the synergistic effect of targeted capture and in-situ degradation of impurities is realized, the complex purification function is internalized in the dye liquor fluid, and the process equipment is greatly simplified.

The invention relates to the technical field of anterior capsular membrane dyeing, in particular to a telescopic lens anterior capsular membrane annular dyeing device which comprises a handle, a dyeing assembly and an injection assembly, the handle is of a cylindrical hollow structure, the dyeing assembly is fixedly installed at the left end of the handle, a telescopic annular dyeing carrier capable of being injected with liquid is arranged at the end of the dyeing assembly, and the injection assembly is connected with the handle. An injection assembly is fixedly installed at the right end in the handle, a rectangular groove is formed in the middle of the upper end of the handle and communicates with the interior of the handle, a detachable liquid storage bin is arranged in the rectangular groove, and the injection assembly can push out a coloring agent in the liquid storage bin through an annular dyeing carrier at the end of the dyeing assembly; according to the invention, the annular dyeing carrier which is telescopic, can be filled with liquid and is accurately sized is combined with the hollow metal guide wire of which the surface is provided with the micropore array, and a dyeing agent seeps out in a closed area where the annular carrier is in contact with the anterior capsule membrane only through micropores in the metal guide wire, so that an annular dyeing belt with an extremely clear boundary is formed.