54results about "Textile solvent-dyeing" patented technology

The invention relates to a production method and production equipment of anti-mite and antibacterial uncertain island superfine fibers, which belong to the technical field of fiber fabric dipping finishing, and are characterized in that functional treatment of the uncertain island superfine fibers is realized by adding an antibacterial agent and an acaricide into supercritical fluid carbon dioxide, so that the produced superfine fibers have the functions of resisting bacteria and killing mites, and the anti-mite and antibacterial performance of the superfine fibers is improved. In order to well guide and treat the surface of the fabric when the supercritical fluid carbon dioxide is used for treating the surface of the fabric, a plurality of finishing guide roller groups are arranged in a zigzag channel, and each finishing guide roller group comprises a parallelogram adjusting frame and a plurality of spraying rollers arranged on a long rod of the parallelogram adjusting frame; the unfigured island superfine fiber fabric to be treated is wound on the material spraying roller in a staggered winding mode, front and back face dipping of the fabric is achieved through transverse movement of the material spraying roller on the unfigured island superfine fiber fabric to be treated, and dipping is more comprehensive and efficient.

The invention belongs to the field of textile dyeing and finishing, and particularly relates to a functional hollow covering yarn and a preparation method and application thereof. The method comprises the following steps: pretreating textile fibers; preparing a functional additive solution; finishing the auxiliary agent and the fibers by adopting a supercritical CO2 process to obtain functional fibers; twisting the functional fibers and the water-soluble fibers into covering yarns; and dissolving the water-soluble fiber to obtain the functional hollow core-spun yarn. The problems that a traditional technology is single in function, poor in environmental protection performance and unstable in structure are solved, and the product has excellent physical performance (breathability, quick drying, fluffiness and the like) and multiple sanitary functions and is suitable for the field of functional fabric.

The invention discloses a decoloring method of a polyester fabric, which has the advantages that the use amount of a solvent is low, and the color of the decolored fabric is stable. The polyester fabric is subjected to a first extraction treatment using a recovery solvent to move a first portion of the dye in the polyester fabric into the recovery solvent. And carrying out first filtering treatment on the recovered solvent and the polyester fabric to obtain the treated polyester fabric. The treated polyester fabric is subjected to a second extraction treatment using a fresh solvent to move a second portion of the dye in the treated polyester fabric to the fresh solvent. And carrying out second filtration treatment to obtain the decolorized polyester fabric and the recovered solvent.

The utility model provides a waterless dyeing device which comprises a base, wherein a transmission unit is arranged on the base; the dyeing tank is arranged on the base, a cover plate is rotationally arranged at one end of the dyeing tank, a first rotating rod matched with the transmission unit is arranged at the other end of the dyeing tank, and a driving part is arranged on the first rotating rod; and the dyeing frame is arranged in the dyeing tank. According to the waterless dyeing device, the textile parts are placed on the dyeing frame one by one, then the dyeing frame is placed in the dyeing tank, in the dyeing process, gas dye can be sprayed out to the textile parts along the dyeing holes in the supporting rod, meanwhile, the transmission unit can enable the driving part to rotate, the linkage disc is controlled to rotate through the rotary disc, and therefore the textile parts can be dyed. In other words, the spinning part on the second rotating rod is controlled to rotate, so that the spinning part can be in contact with the dye flowing out of the dyeing holes in multiple directions, and the dyeing effect of the gas dye is improved.

PURPOSE: To provide a decolorization method of a polyester fabric.SOLUTION: There is provided a decolorization method of a polyester fabric, including the following steps. First extraction treatment is performed on the polyester fabric using a recycled solvent, so that a first portion of a dye in the polyester fabric moves into the recycled solvent. First filtering treatment is performed on the recycled solvent and the polyester fabric to obtain a treated polyester fabric. Second extraction treatment is performed on the treated polyester fabric using a fresh solvent, so that a second portion of the dye in the treated polyester fabric moves into the fresh solvent. Second filtering treatment is performed to obtain a decolored polyester fabric and the recycled solvent.SELECTED DRAWING: Figure 1

The invention relates to the technical field of textile fabrics, in particular to a comfortable wool blended fabric and a preparation method thereof. The comfortable wool blended fabric comprises the following fiber components in percentage by mass: 25%-45% of merino wool, 20%-35% of lyocell fibers, 10%-25% of bio-based polyamide 56 fibers, 5%-15% of recycled polyester fibers and 3%-8% of spandex. Due to the combination, the softness, the air permeability, the elasticity and the close-fitting comfort of the final fabric are well balanced, and the scratchiness of the pure wool fabric is remarkably reduced. Besides, a large amount of bio-based and regenerated fibers are used in the formula, so that the dependence on non-renewable petroleum resources is reduced, and the concept of low carbon and environmental protection is embodied. Finally, through double innovation of component design and process design, the wool blended fabric which is extremely comfortable, excellent in functionality and environmentally friendly is successfully prepared.

The invention discloses a supercritical waterless dyeing kettle, a dyeing system and a dyeing method.The dyeing kettle at least comprises a dyeing kettle body, the dyeing kettle body comprises a closed end and an open end, and a dyeing cavity is formed in the dyeing kettle body; the kettle cover is fixedly connected with the open end of the dyeing kettle body and closes the open end; the heating and cooling jacket device is fixed outside the dyeing kettle body in a sleeving manner, the heating and cooling jacket device is of a hollow structure, and a medium with a heating or cooling function is introduced into the heating and cooling jacket device; the dyeing warp beam is arranged in the middle of a dyeing cavity of the dyeing kettle body, the dyeing warp beam is a hollow pipe body, and a plurality of fluid permeation holes are formed in the pipe wall of the dyeing warp beam; wherein a spiral flow guide structure is further arranged in the heating and cooling jacket device, and the spiral flow guide structure is arranged along the outer wall of the dyeing kettle body. The method is suitable for implementing efficient and uniform waterless dyeing treatment on the textile by using the supercritical carbon dioxide medium.

The invention relates to the technical field of cashmere blend fiber fabrics, in particular to a preparation method of a cashmere blend fiber fabric. The cashmere blend fiber fabric is prepared from the following raw materials in parts by weight: 50 to 60 parts of cashmere fiber, 3 to 5 parts of polybutylene adipate elastic fiber, 5 to 8 parts of bacterial cellulose nanofiber, 17 to 22 parts of PNIPAM grafted modified polyester, 6 to 10 parts of polydopamine coated basalt short fiber, 8 to 12 parts of bamboo pulp fiber and 0.8 to 1.5 parts of cross-linking agent. In the manufacturing process of the cashmere blend fiber fabric, the breaking strength of the fabric is improved, meanwhile, the core touch feeling of cashmere is kept, a temperature triggering-humidity cooperation intelligent humidity adjusting system is formed, functional adjustment of the cashmere fabric is improved, the unification of the elastic-soft-durable performance is achieved in the technology, and the production cost is reduced. In-fiber in-situ fixation of the antibacterial agent is achieved, the problem that a traditional after-finishing functional agent is prone to falling off is solved, zero discharge of waste water is achieved, and good environmental protection significance is achieved.

A method for improving a solubility and a dissolution rate of dyestuffs in supercritical carbon dioxide fluid is provided, by first increasing the temperature to a target temperature above the melting point of the dyestuff to melt the dyestuff, and then mixing the supercritical carbon dioxide fluid in flow with the molten dyestuff at a certain mass ratio, afterwards, lowering the supercritical carbon dioxide fluid with the dyestuff dissolved to the initial temperature, repeating mixing and cooling processes in a cycle and maintaining for a certain time, and all temperature conditions remaining the same as before during the cycle repetition; wherein the dyestuff is a dye and / or a functional auxiliary; the initial temperature is lower than the target temperature; the pressure of the supercritical carbon dioxide fluid remains consistent. The invention improves the solubility and dissolution rate of dyestuffs in supercritical carbon dioxide, without adding other cosolvents, will not cause harm to the human body, and does not need to consider the separation and removal of cosolvents.

The supercritical CO2 dyeing recovery and separation system comprises a separation kettle, a temperature drop circulation assembly and a central controller, the separation kettle is provided with a movable cylinder and a positioning cylinder which can be driven by a lifting mechanism to be close to or away from each other, and a filter membrane capable of separating a cylinder channel is arranged between the movable cylinder and the positioning cylinder; the filtering membrane is wound and unwound by a winding and unwinding device so as to replace a filtering section arranged in a barrel channel, the barrel channel is used for feeding and discharging through a feeding connecting pipe and a discharging connecting pipe which extend out of the shell respectively, and the temperature in the shell is regulated and controlled by a temperature reduction circulating assembly; the central controller is electrically connected with the separation kettle and the temperature drop circulation assembly, automatic section changing of the filtering membrane can be achieved through the winding and unwinding device, and only low-frequency membrane cylinder changing is needed manually, so that maintenance cost and production interruption can be reduced on the basis that CO2 recovery purity is guaranteed.

Methods are directed to the use of a supercritical fluid for performing a dyeing of a material such that dye from a first material is used to dye a second material. A supercritical fluid is passed through a first material in a pressurized vessel. The supercritical fluid transports the dye from the first material to at least a second material causing a dye profile of the second material to change as a result of dye from the first material perfusing the second material.

An embodiment herein provides a process for dyeing of textile materials (108) with supercritical fluid. One or more dye materials (102) along with additives (if required) are mixed with at least one suitable solvent (104) to obtain one or more dye solutions (106). A textile material (108) is pre-treated with the one or more dye solutions (106) to obtain a dye coated textile material (110). The dye-coated textile material (110) is exposed to the supercritical fluid (112) in a supercritical fluid dyeing vessel at controlled pressure and temperature. The supercritical fluid (112) solubilizes and diffuses the one or more dye materials (102) inside the surface, pores and capillaries of the textile material (108). The supercritical fluid vessel is then depressurized below supercritical condition to entrap the one or more dye materials (102) in the textile material (108) to obtain a supercritical fluid dyed textile material (114).

The present application relates to the field of dyeing equipment, disclose a kind of supercritical carbon dioxide anhydrous dyeing horn steady flow device and application, including being located between the air inlet pipe and yarn cylinder horn steady flow main body;The horn steady flow main body includes horn front section, horn main section and horn end section, the air inlet pipe is connected with horn front section, yarn cylinder is connected with horn end section;The horn main section is the expanding diameter structure gradually increasing from input end to output end, and the inner wall of horn main section is evenly distributed with several pieces of axial guide rib along the circumferential direction, and axial guide rib is streamline straight rib.The present application has the advantages that: it can effectively stabilize the internal flow field of supercritical carbon dioxide dyeing equipment, improve dyeing uniformity, improve process stability and reduce energy consumption.

A dyed textile hook-and-loop fastener obtained through supercritical CO2 dyeing of a textile hook-and-loop fastener, is dyed in a deep color, and exhibits a high rupture elongation due to having less thermal history in a dyeing step.

A temperature control device suitable for supercritical CO2 waterless dyeing equipment comprises a heat conduction oil device and an ethylene glycol refrigerating fluid device, the heat conduction oil device comprises a heat conduction oil inlet pipeline, a heat conduction oil pipeline and a heat conduction oil outlet pipeline, the heat conduction oil pipeline is arranged in a supercritical CO2 dyeing system, and the ethylene glycol refrigerating fluid device is arranged in the heat conduction oil pipeline. The heat-conducting oil inlet pipeline and the heat-conducting oil outlet pipeline are correspondingly connected to the front end and the rear end of the heat-conducting oil pipeline respectively; the ethylene glycol refrigerating fluid device comprises an ethylene glycol refrigerating fluid supply pipeline and an ethylene glycol refrigerating fluid backflow pipeline, ethylene glycol refrigerating fluid in the ethylene glycol refrigerating fluid supply pipeline exchanges heat with heat conduction oil in the heat conduction oil inlet pipeline, and the ethylene glycol refrigerating fluid after heat exchange is output through the ethylene glycol refrigerating fluid backflow pipeline. According to the supercritical CO2 dyeing system, the ethylene glycol refrigerating fluid device is additionally arranged to carry out heat exchange on the heat conduction oil inlet pipeline at the front end of the supercritical CO2 dyeing system, so that the temperature of heat conduction oil is controlled, and the situation that after dyeing is completed, the supercritical CO2 dyeing system is still continuously heated, and consequently the color of a product changes is avoided.

The invention discloses a chemical fiber dyeing processing device which comprises a dyeing cylinder, an airflow pipe set is arranged on the inner side of the dyeing cylinder, the airflow pipe set comprises an air inlet pipe and an air collecting pipe, the air inlet pipe is arranged at the bottom of the dyeing cylinder, the air inlet end is arranged on the outer side of the dyeing cylinder, and the air collecting pipe is arranged on the top of the dyeing cylinder. The air outlet end of the air collecting pipe is arranged on the outer side of the dyeing cylinder and connected with an air pump, and the output end of the air pump is connected with an air storage tank. A plurality of dispersing pipes are arranged above the air inlet pipe in a communicating manner, and air outlets of the dispersing pipes all point to the center of the dyeing jar; the airflow pipe set is arranged on the inner side of the dyeing cylinder, the inlet end and the outlet end of the airflow pipe set are arranged on the outer side of the dyeing cylinder, and meanwhile the air outlet pipe is connected with the air pump, so that low-temperature air can be controlled to enter the dyeing cylinder under the work of the air pump, is output from the dyeing cylinder after being heated and takes away heat of dyed steel, and cone yarn is cooled.

The invention discloses a wool fabric waterless dyeing device and a dyeing method thereof in the technical field of fabric processing, the wool fabric waterless dyeing device comprises a reaction kettle main body, a support is arranged on the reaction kettle main body, a hoisting piece, a plurality of outer dyeing columns and a plurality of inner dyeing columns are arranged on the support, and the outer dyeing columns and the inner dyeing columns are arranged on the hoisting piece. The inner dyeing columns are located on the inner sides of the outer dyeing columns, and second through holes used for being communicated with the inner dyeing columns and first through holes used for being communicated with the outer dyeing columns are formed in the support; a fixing piece for fixing the outer dyeing column is arranged on the bracket; the outer dyeing column can move in the axial direction (such as downward) by relieving the fixed limitation on the outer dyeing column, so that the operation space for the inner dyeing column is directly reserved, an operator can directly and conveniently get close to the inner dyeing column without shuttling back and forth in a narrow fixed column gap with great effort or detaching the outer dyeing column in advance, and the operation efficiency is greatly improved. The wool fabric is loaded or unloaded, so that the manual working efficiency is improved.

The invention provides a waterless dyeing system and a control method thereof, and relates to the technical field of textile dyeing, the waterless dyeing system comprises a dyeing kettle, a sarong and a dye bin, the sarong and the dye bin are both arranged in a cavity of the dyeing kettle, the dyeing kettle is provided with a first connecting pipe, the sarong is connected to the first connecting pipe, the dyeing kettle is further provided with a second connecting pipe and a third connecting pipe, the second connecting pipe is connected into a cavity of the dyeing kettle, the dye bin is connected to the third connecting pipe, the first connecting pipe is sequentially connected to the circulating pump and the third connecting pipe outside the dyeing kettle, and the second connecting pipe is sequentially connected to the first control valve, the circulating pump and the third connecting pipe outside the dyeing kettle. The control method comprises the steps that in the dye dissolving stage, the first control valve and the circulating pump are started, and the second connecting pipe, the first control valve, the circulating pump and the third connecting pipe are sequentially connected to form a bypass loop; in the dyeing stage, the first connecting pipe, the circulating pump and the third connecting pipe form a main loop. A dye kettle in the prior art is omitted, and the dye bin is easier to clean and replace.

The present application relates to the field of ecological and environmentally friendly waterless dyeing, and particularly relates to a horizontal supercritical waterless dyeing color sample system and application thereof. The system comprises a carbon dioxide gas supply assembly, a dyeing circulation assembly and a plurality of dyeing kettles. The carbon dioxide gas supply assembly is connected to the dyeing kettles to provide carbon dioxide gas for the dyeing kettles. The dyeing circulation assembly is in communication with the dyeing kettles to form a dyeing circulation loop. The system further comprises a dyeing support which is detachably connected to the dyeing kettles. The dyeing support comprises dyeing pipelines and dye storage pipelines which are in communication with each other. The dyeing pipelines are used to support the winding of the textile to be dyed. The dye storage pipelines are used to store the dye. The end of the dye storage pipeline which is away from the dyeing pipeline can be inserted into the dyeing circulation assembly to form a part of the dyeing circulation assembly. The present application can determine the dye formula and process parameters required by the production equipment, thereby obtaining the color required by mass production.

A method and an integrated system for dyeing synthetic, natural, and blended textiles in the form of fabrics, yarns, and garments are provided. The integrated system includes a first pressurizing pump for pressurizing liquefied CO2 to supercritical CO2 (Sc—CO2); a second pressurizing pump for pressurizing CO2 to liquefied CO2; a liquefied CO2 storage vessel for storing the liquefied CO2 and the separated liquefied CO2 from the one or more cyclone separators; a heater for heating the Sc—CO2; a dyestuff vessel for mixing a dyestuff and the Sc—CO2 to obtain Sc—CO2-mixed dyestuff; a dyeing vessel for dyeing the textile by circulating the Sc—CO2 and the Sc—CO2-mixed dyestuff between the dyeing vessel and the dyestuff vessel; and one or more cyclone separators for removing the dyestuff from the Sc—CO2-mixed dyestuff to obtain separated liquefied CO2.

The application relates to the technical field of textile printing and dyeing, and discloses a waterless printing and dyeing process intelligent control method and system.The method comprises the following steps: collecting dye dispersion and fabric fiber density data in a waterless medium, and generating an initial concentration distribution map; inputting a convolutional neural network to identify concentration instability regions and local deviation values; if the deviation exceeds a preset threshold, iteratively optimizing dye injection parameters to obtain an optimized concentration distribution map; segmenting the regions and extracting dye penetration path vectors of high fiber density regions; determining regional adsorption adjustment coefficients through a support vector machine; updating the parameters to obtain a dynamic concentration regulation sequence; iteratively optimizing the final uniform coloring distribution through coloring simulation; and extracting quality indicators to optimize process parameters and determine a production compatibility scheme.The application solves the problem of uneven dye dispersion through multi-dimensional data fusion and intelligent algorithm regulation, and improves coloring uniformity, process stability and production compatibility.

The production method and production equipment of mite-proof and antibacterial island-insea ultrafine fibers of the present invention belong to the technical field of impregnation finishing of fiber fabrics. By adding antibacterial agents and acaricides in supercritical carbon dioxide fluid, the functional treatment of island-insea ultrafine fibers is realized, so that the produced ultrafine fibers have antibacterial and acaricidal functions. In order to guide and surface-treat the fabric well when performing surface treatment on the fabric surface in supercritical carbon dioxide fluid, a number of finishing guide roller groups are arranged in the return channel. The finishing guide roller group includes a parallelogram adjustment frame and a number of spraying rollers arranged on the long rods of the parallelogram adjustment frame. The island-insea ultrafine fiber fabric to be treated is wound around the spraying rollers in a staggered winding manner. The front and back sides of the fabric are impregnated by the transverse movement of the spraying rollers on the island-insea ultrafine fiber fabric to be treated, and the impregnation is more comprehensive and efficient.

The invention discloses a gas dyeing method for whole-process commercial production, which belongs to the technical field of waterless dyeing, and comprises the steps of small-scale sample making, process pilot-scale test and commercial gas dyeing, in the small-scale sample making, test dyeing is performed in small-scale equipment, and dyeability and dyeing process conditions of to-be-dyed cloth are pre-selected and determined; the process pilot plant test comprises the following steps: performing trial dyeing in pilot plant test equipment, verifying and adjusting pre-selected process conditions; commercial gas dyeing is amplified by combining process conditions of a small-scale test and a pilot-scale test, and is carried out in mass production equipment; according to the method, on the basis of industrialization of the supercritical CO2 fluid gas dyeing process, various factors influencing the market for commodity requirements are fully considered, through perfect system configuration, selection and screening of pigment color matching schemes are included, amplification of the process scale is subjected to a progressive step-by-step amplification process from small-scale test and pilot-scale test to industrialization, and the process quality is greatly improved. The industrialization of the supercritical CO2 fluid gas dyeing process is really realized.

A method and an integrated system for dyeing synthetic, natural, and blended textiles in the form of fabrics, yarns, and garments are provided. The integrated system includes a first pressurizing pump for pressurizing liquefied CO2 to supercritical CO2 (Sc-CO2); a second pressurizing pump for pressurizing CO2 to liquefied CO2; a liquefied CO2 storage vessel for storing the liquefied CO2 and the separated liquefied CO2 from the one or more cyclone separators; a heater for heating the Sc-CO2; a dyestuff vessel for mixing a dyestuff and the Sc-CO2 to obtain Sc-CO2-mixed dyestuff; a dyeing vessel for dyeing the textile by circulating the Sc-CO2 and the Sc-CO2-mixed dyestuff between the dyeing vessel and the dyestuff vessel; and one or more cyclone separators for removing the dyestuff from the Sc-CO2-mixed dyestuff to obtain separated liquefied CO2.

A decolorization method of a polyester fabric, including the following steps, is provided. A first extraction treatment is performed on the polyester fabric using a recycled solvent, so that a first portion of a dye in the polyester fabric moves into the recycled solvent. A first filtering treatment is performed on the recycled solvent and the polyester fabric to obtain a treated polyester fabric. A second extraction treatment is performed on the treated polyester fabric using a fresh solvent, so that a second portion of the dye in the treated polyester fabric moves into the fresh solvent. A second filtering treatment is performed to obtain a decolored polyester fabric and the recycled solvent.

The invention provides a heat setting system taking heat energy generated by reaction of printing and dyeing wastewater as a heat source, and relates to the technical field of energy conservation and environmental protection. The system comprises a setting machine, a waste heat recovery and waste gas purification system, a wastewater concentration system and a supercritical water oxidation system, the setting machine is connected with a circulating water path, and the circulating water path is connected with the supercritical water oxidation system; the circulating water path is used for absorbing reaction heat generated in the reaction space and heat of reaction products through circulating water and conveying the circulating water absorbing the heat to the setting machine. Efficient treatment of printing and dyeing wastewater is achieved through supercritical water oxidation, meanwhile, waste liquid reaction heat and waste heat of reaction products serve as heat sources of the setting machine, and the advantages of being efficient and saving energy are achieved.

The invention relates to a multilayer dye box and a dyeing device for supercritical waterless dyeing, the dye box comprises a dye box body and a dye box inner cylinder, the dye box inner cylinder is arranged in the dye box body, the dye box inner cylinder comprises a plurality of cylinder sections, the cylinder sections are mutually matched in structure and can be detachably connected, and the dye box inner cylinder is arranged in the dye box body. An independent dye containing space is arranged in each shell ring, a circulation bottom plate is arranged on each shell ring and used for dividing the adjacent dye containing spaces, circulation holes used for circulation of supercritical gas are formed in the circulation bottom plates, a gas inlet is formed in the dye box body, one end of the gas inlet is connected with the supercritical gas, and the other end of the gas inlet is connected with the supercritical gas. And the other end of the cylinder section is positioned in the dye box inner cylinder and is used for guiding dye supercritical gas into the cylinder section. The problem that a large amount of undissolved dye is accumulated in the dyeing box and blocks the filter screen after carbonization is effectively avoided, and the problem of low-efficiency dyeing caused by dye accumulation is solved.

The invention provides a supercritical carbon dioxide dyeing system and a carbon dioxide recovery method thereof, and relates to the technical field of dyeing, the supercritical carbon dioxide dyeing system comprises a dyeing kettle, a liquid carbon dioxide storage tank and a buffer tank, a first control valve is arranged between the liquid carbon dioxide storage tank and the dyeing kettle; a second control valve is arranged between the buffer tank and the dyeing kettle, and a third control valve and a compressor are arranged between the buffer tank and the liquid carbon dioxide storage tank. The buffer tank is additionally arranged in the dyeing system, the high-pressure carbon dioxide in the dyeing kettle can be received through the buffer tank, the effect of rapidly releasing the carbon dioxide in the dyeing kettle is achieved, the efficiency of recycling the carbon dioxide in the dyeing kettle can be improved, the waiting time for repeated use of the dyeing kettle is shortened, and then the working efficiency of the dyeing system is improved.

The present invention discloses a yarn waterless printing and dyeing production process, which uses a yarn waterless printing and dyeing production line to perform yarn waterless dyeing, including the following steps: 1) placing the bobbin yarn on a pay-off device, and then passing each yarn corresponding to each bobbin yarn through a traction roller respectively; 2) pulling to a feeder device for combing respectively, and conveying the feeder yarns forward respectively; 3) each yarn is fed into different dyeing devices of a waterless dyeing device for dyeing respectively, and continues to be conveyed forward respectively after dyeing is completed; 4) each dyed yarn is respectively fed into a steam color fixing device for color fixing; 5) each color fixed yarn is respectively fed into a cleaning device for cleaning. The yarn waterless printing and dyeing production process of the present invention uses a self-designed yarn waterless printing and dyeing production line for yarn waterless dyeing, which is very suitable for the dyeing needs of small-scale personalized colored yarns, has a simple process flow, small equipment investment, and good dyeing effect.

The invention provides a dye dissolving system, a dyeing system and a dyeing method, and relates to the technical field of fabric dyeing. The dyeing system comprises a dyeing kettle and a dye dissolving system, the dye dissolving system comprises a dye kettle, a partition plate, a dye layer and a separator are sequentially arranged in the dye kettle, the dye kettle is further provided with a medium inlet and a medium outlet, the partition plate, the dye layer and the separator are arranged between the medium inlet and the medium outlet, and the medium inlet is close to the partition plate. The medium outlet is arranged close to the separator; the external circulation pipeline is connected to the medium inlet and the medium outlet of the dye kettle, the external circulation pipeline comprises a flow direction keeping mechanism, and the flow direction keeping mechanism is configured to respond to the change of the flow direction of the medium in the external circulation pipeline, so that the medium entering the dye kettle always enters from the medium inlet and flows out from the medium outlet. The dyeing method comprises the step of alternately carrying out positive circulation dyeing and reverse circulation dyeing. According to the invention, the dye dissolution consistency in the positive and negative circulation process can be realized, and the dyeing uniformity is improved.