38 results about "Ring dyeing" patented technology

The invention discloses a method for cation modification and salt-free dyeing of a cellulose fiber fabric. The method comprises the steps as follows: preparing a high-polymer cation modifier aqueous solution with soft water, adding the cellulose fiber fabric, then adding NaOH, exerting pressure, heating the solution for a thermostatic reaction, performing cooling and pressure relief, discharging the modifying solution, and performing washing to obtain a cation-modified fabric; placing the cation-modified fabric in a dyeing machine, adding the soft water, sequentially dissolving reactive dye and sodium carbonate with return water, injecting the reactive dye and the sodium carbonate into the dyeing machine, heating the dyeing machine to the dyeing temperature, keeping the temperature, discharging a residual dyeing solution, and dehydrating and drying the fabric after a washing-soaping-washing process to obtain the salt-free low-alkaline dyed fabric. With the adoption of the method, salt-free low-alkali dyeing is realized, the problems of dyeing defects, color sinking and ring dyeing as well as reduction of the color fastness when cellulose fiber fabrics modified by high-polymer cation modifiers are dyed with reactive dyes are solved, a leveling agent is not required to be added during dyeing, the sodium carbonate and the dye can be added into a dyeing vat simultaneously, the sodium carbonate is not required to be added repeatedly during dyeing, and the dyeing operation is simple and easy to control.

The invention discloses a distressed processing method for colored fabric, which is characterized in that a cation modification technology of yarn is added before the traditional yarn dyeing processing technology, so that the whole processing technology comprises the following steps in sequence: yarn preparation, cation modification of yarn, yarn dyeing processing, sizing, preshrinking, washing and finished products. The distressed processing method has the advantages that the surface layer of the yarn colors up uniformly, and the inner layer of the tarn maintains the original white core, so a clear skin - core effect is formed; the processed fabric has uniform ring dyeing and a uniform distressed treatment effect; by the combination application of a cation modifier and reactive dyes, the dyed fabric achieves the effect which sulfur dyes or indigo dyes can just achieve; and the distressed processing method greatly reduces energy consumption, reduces environmental pollution, ensures the stability and the production efficiency of dyeing, and enhances the quality of products.

The invention relates to a continuous loose fiber dyeing machine. The continuous loose fiber dyeing machine comprises a dye vat; a mechanism which is fitted with the dye vat and used for conveying loose fibers is a double mesh belt dyeing conveying mechanism, and the double mesh belt dyeing conveying mechanism comprises two closed mesh belts (namely, a ring mesh belt A and a ring mesh belt B) and transmission components which are respectively in transmission fit with each ring mesh belt; two ring dyeing mesh belts in the dye vat are in clearance stacking fit with each other, the two ring dyeing mesh belts respectively fitted with the inlet end and the outlet end of the dye vat respectively form a duckbilled input port and a duckbilled output port, and the two ring dyeing mesh belts arranged outside the dye vat are respectively fitted with the respective transmission components so as to form a circular transmission. The invention has the prominent and substantive effects as follows: because the loose fibers are clamped and then sent to the dye vat for dyeing and the loose fiber is thin, the loose fiber is easy to be dyed completely; and with the help of shower pipes, the dye permeability of the loose fibers is improved, and little dyes are taken away, therefore, the dye consumption is saved.

The invention discloses a modification method for a salt-free low-alkaline deeply dyed type cellulose fiber fabric and a dyeing process for the salt-free low-alkaline deeply dyed type cellulose fiber fabric. The modification method is characterized by comprising the following steps: (1) preparation of chitosan oligosaccharide; (2) preparation of reactive chitosan oligosaccharide derivative; (3) modification of cellulose fibers with the reactive chitosan oligosaccharide derivative, and dyeing of a modified cellulose fiber fabric with reactive dyes in a dyeing machine, so as to obtain the salt-free low-alkaline dyed fabric. The method for modification of the cellulose fibers with the reactive chitosan oligosaccharide derivative and the dyeing process have the advantages that the binding strength between the chitosan oligosaccharide and the cellulose fibers can be obviously improved, the adsorption capacity of the obtained chitosan oligosaccharide modified cellulose fiber fabric for the reactive dyes can be obviously enhanced, the cellulose fiber fabric can be dyed under the salt-free low-alkaline condition to achieve a certain deep dyeing effect, the color fastness is improved, the problems of color tone, ring dyeing, color lake and poor deep dyeing property of the salt-free low-alkaline dyeing process can be solved, and the defects of hardening, stiffness, chemical fiber and the like on the surface of the fabric processed with the high molecular weight chitosan oligosaccharide can be overcome; in addition, the best dyeing effect can be obtained through optimizing the dyeing process.

Disclosed herein is the preparation of indigo-dyed cotton denim fabrics suitable for use in making cotton denim garments and other denim articles. These indigo-dyed fabrics are prepared from cotton warp yarn which has been pre-treated with an emulsion copolymer prior to being contacted with an aqueous dye liquor comprising a dispersion of an indigo dyestuff. Such copolymer-treated cotton warp yarn can be woven or knitted into cotton denim griege fabrics along with untreated cotton weft yarn. Such griege denim fabric can then be indigo-dyed using the aqueous dye liquor. Alternatively, the emulsion copolymer-treated cotton warp yarn can be indigo-dyed by contact with the aqueous dye liquor before this warp yarn is incorporated into denim fabric along with the untreated cotton weft yarn. The cotton denim fabric produced by either method has the appearance of conventional ring-dyed indigo fabrics. Such methods, however, can be carried out with greater control, precision, reproducibility and less waste than conventional ring dyeing operations.

The invention discloses a high-efficiency polyester fabric dyeing method, and belongs to the technical field of dyeing. According to the technical scheme, polyester fabrics which do not exceed the maximum load of dyeing equipment are simultaneously dyed in dyeing equipment in a form of a first cloth belt and a second cloth belt, wherein the head and the tail of the first cloth belt are connected to form a ring, the head end of the second cloth belt is connected to the position where the head and the tail of the first cloth belt are connected, and the length of the second cloth belt is less than or equal to the length of the first cloth belt; the first cloth belt comprises one piece of polyester fabric or is formed by splicing at least two pieces of polyester fabrics end to end, and the second cloth belt comprises one piece of polyester fabric or is formed by splicing at least two pieces of polyester fabrics end to end; and the length of the first cloth belt and the length of the secondcloth belt are both smaller than the longest cloth capacity of a single tube of the dyeing equipment. The high-efficiency polyester fabric dyeing method has the advantages of high dyeing efficiency and low water consumption and low energy compared with the conventional single-tube single-ring dyeing.

The invention provides a dyeing treatment process for yarns. According to the invention, yarns are dyed through secondary dyeing and the colors of the yarns are fixed by a dye-fixing agent so as to improve the color fastness of the yarns; and warping, bleaching, loosing, primary dyeing, drying, secondary loosing, refined dyeing, fixing and packaging are successively carried out for dyeing of the yarns, so color fastness in yarn dyeing is improved, the yarns are not prone to fading after long-term use, and the service life of the yarns is prolonged.

The invention relates to a preparation method for yarns in the textile field, and discloses a short-fiber ring dyeing yarn preparation method. The method comprises the following steps: 1, allowing loose fiber to be subjected to impurity-removing and decolorizing processing; 2, allowing the loose fiber to be subjected to coloring processing; 3, spinning the fibers not colored into fine yarns; 4, spinning colored coarse sliver; and 5, spinning the ring dyeing yarn with white core. The method is simple in process, convenient to operate, consumes less dyestuff additive and energy, is small in environment pollution, and large in fiber selectivity for preparing the ring dyeing yarn. Moreover, the prepared yarn has obvious ring dyeing effect, and the ratio of the 'skin layer' to 'core layer' is adjustable.

The invention discloses a technology for processing a soft anti-fading denim fabric. The technology comprises the following specific steps: treating a base denim fabric in a laccase solution, performing enzyme deactivation, cleaning and drying; dipping the base fabric subjected to enzyme treatment in dye liquor, rinsing and airing; performing soap boiling on the dyed denim fabric in soap boiling liquor containing soap powder and anhydrous sodium carbonate; finishing in an aqueous solution of softening agent; and setting. The technology disclosed by the invention has the beneficial effects that xylogen in the base fabric can be removed by utilizing laccase in the processing technology disclosed by the invention, the dyeing property is improved, and water resources are not polluted after removal; the dye liquor can be uniformly distributed on the inner and outer layers of yarns in the dyeing process, a ring dyeing phenomenon is avoided, the diffusive force of the dye liquor is high, and the dyed fabric is high in dye-uptake and uniform in dyeing; and due to the soap boiling, the distribution condition of dyes on the denim fabric can be changed, partial flooding can be removed, the brightness of the denim fabric is increased, and the fading phenomenon of the denim fabric is improved.

The invention belongs to the technical field of textile dyeing and finishing, and particularly relates to a method for cyclic dyeing by using wastewater after dyeing in yarn-dyeing field. According tothe invention, a reactive dye is added into reactive dyeing wastewater in the yarn-dyeing field, then yarns are dyed, the reactive dye is added into wastewater after dyeing, and then dyeing is continued, so that recycling is achieved. The current situation that the yarns can only be dyed with clean softened water is thoroughly changed, and the output of the dyeing wastewater can be reduced to a great extent. The dyeing wastewater does not need to be subjected to sewage treatment steps of decoloration and flocculation, and the reactive dyeing wastewater is directly used for dyeing the yarns again, so that the original wastewater treatment step is omitted. The method provided by the invention can save water and the usage amount of the dye, finally reduces the comprehensive production and processing cost of a yarn-dyed fabric, and has more obvious benefits for large-batch continuous production varieties.

The invention discloses a yarn dyeing method with a controllable ring dyeing effect and an indigo-dyed yarn. The yarn dyeing method comprises the following steps of performing boiling-off treatment on cotton yarns ; performing soft finishing on the cotton yarns; performing waterproof treatment on the cotton yarns; performing baking treatment on the cotton yarns; performing polyurethane padding treatment on the cotton yarns; by taking short fibers as an outer wrapping fiber layer and the cotton yarns as core yarns, carrying out core-spun yarn process treatment on a spinning frame to form a core-spun yarn structure; carrying out beaming; carrying out indigo dyeing treatment on core-spun yarns; carrying out oxidation treatment on the core-spun yarns; washing the core-spun yarns with water; and drying the core-spun yarns. According to the yarn dyeing method with the controllable ring dyeing effect provided by the invention, boiling-off treatment does not need to be conducted on the yarns, original wax and impurities of the yarns are combined with a waterproof layer, outer wrapping fibers of the core-spun yarns are colored, and core yarns are not colored, so that the effect that the yarns are subjected to ring dyeing through the indigo dye is achieved, and the ring dyeing effect of the yarns can be adjusted by controlling the thickness of the core yarns and the thickness of the outer wrapping fibers.

The invention discloses a wastewater circulating dyeing system and method based on an ultra-low bath ratio dyeing process. The wastewater circulating dyeing system based on the ultra-low bath ratio dyeing process comprises a supporting plate, wherein the bottom of the supporting plate is fixedly connected with a supporting frame; the top of the supporting frame is fixedly provided with a circulating box and a dyeing tank; the circulating box and the dyeing tank are communicated through a feeding pipe; a material control mechanism is arranged in the feeding pipe; and a wastewater circulating mechanism is arranged in the circulating box. The wastewater circulating dyeing system and method based on the ultra-low bath ratio dyeing process provided by the invention relates to the technical field of dyeing processes. According to the wastewater circulating dyeing system and method based on the ultra-low bath ratio dyeing process, the wastewater circulating mechanism and a filtering unit are arranged, a first water pump and a second water pump are used for conveying water liquid, a filtering plate is used for filtering the water liquid, and the filtering plate is mounted by clamping a clamping rod and a mounting block, so that the recycling of waste liquid is realized, impurity particles can be prevented from falling into the next use, and the subsequent filtering efficiency is improved through disassembly and cleaning.

An automatic dyeing and decolorizing device comprises a main body, a fixed liquid box, a silver dyeing liquid box, a developing liquid box, a washing liquid box, a partition plate, an adapter ring, adyeing bin, a dyeing box, a connecting shaft, an air dispersing box, a liquid discharging box, a first handle, a through-flow cover, stand columns, supporting legs, an upper cover, a liquid inlet, a supporting plate, vent holes, grooves, convex shoulders, shaking tables, an adapter sleeve, supporting pieces, a control valve, a motor, a connection rod, an upper clamping ring and a lower clamping ring. The upper cover is provided with an upper hole and a guide plate; the adapter sleeve comprises a liquid discharge ring, a spacer ring, a recess and a second handle; and the supporting plate is arranged in the main body, four partition plates are arranged above the supporting plate, and the four partition plates divide four spaces for containing the fixed liquid box, the silver dyeing liquid box, the developing liquid box and the washing liquid box respectively.