CN114164684A - Process for dyeing yarn by adopting vat dye and yarn dyeing system - Google Patents
Process for dyeing yarn by adopting vat dye and yarn dyeing system Download PDFInfo
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- CN114164684A CN114164684A CN202111586936.3A CN202111586936A CN114164684A CN 114164684 A CN114164684 A CN 114164684A CN 202111586936 A CN202111586936 A CN 202111586936A CN 114164684 A CN114164684 A CN 114164684A
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Images
Classifications
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/22—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using vat dyestuffs including indigo
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
- D06B15/00—Removing liquids, gases or vapours from textile materials in association with treatment of the materials by liquids, gases or vapours
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
- D06B15/00—Removing liquids, gases or vapours from textile materials in association with treatment of the materials by liquids, gases or vapours
- D06B15/02—Removing liquids, gases or vapours from textile materials in association with treatment of the materials by liquids, gases or vapours by squeezing rollers
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
- D06B15/00—Removing liquids, gases or vapours from textile materials in association with treatment of the materials by liquids, gases or vapours
- D06B15/04—Removing liquids, gases or vapours from textile materials in association with treatment of the materials by liquids, gases or vapours by suction
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
- D06B15/00—Removing liquids, gases or vapours from textile materials in association with treatment of the materials by liquids, gases or vapours
- D06B15/09—Removing liquids, gases or vapours from textile materials in association with treatment of the materials by liquids, gases or vapours by jets of gases
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
- D06B23/00—Component parts, details, or accessories of apparatus or machines, specially adapted for the treating of textile materials, not restricted to a particular kind of apparatus, provided for in groups D06B1/00 - D06B21/00
- D06B23/14—Containers, e.g. vats
- D06B23/18—Sealing arrangements
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
- D06B23/00—Component parts, details, or accessories of apparatus or machines, specially adapted for the treating of textile materials, not restricted to a particular kind of apparatus, provided for in groups D06B1/00 - D06B21/00
- D06B23/20—Arrangements of apparatus for treating processing-liquids, -gases or -vapours, e.g. purification, filtration or distillation
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
- D06B3/00—Passing of textile materials through liquids, gases or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating
- D06B3/04—Passing of textile materials through liquids, gases or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating of yarns, threads or filaments
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Treatment Of Fiber Materials (AREA)
Abstract
The invention relates to a process for dyeing yarns by vat dyes and a yarn dyeing system, wherein the dyeing process and the dyeing system control parameters in the process of the process by the steps of soaking, repeatedly and alternately carrying out dip dyeing, oxidation and finally drying on the yarns, so that the parameters of each dip dyeing time, the liquid carrying rate after dip dyeing, the oxidation effect, the liquid carrying rate after oxidation and the like of the yarn can be kept constant or consistent, thereby keeping the dye-uptake of the yarn in each dip dyeing consistent, thus keeping the dye liquor consumption and concentration change of each dye vat consistent, on the basis, the concentration and the liquid level of the dye liquor in each dye vat can be kept constant all the time in the yarn dyeing process by supplementing the dye liquor with the same concentration into each dye vat at the same speed, thereby stabilizing the dye uptake of the yarn, reducing the color difference fluctuation range of the yarn and even finally eliminating the color difference.
Description
Technical Field
The invention relates to a process for dyeing yarns by adopting vat dyes and a yarn dyeing system.
Background
When the yarn is dyed, particularly when the yarn for jean weaving is dyed, because the single dyeing rate of the vat dyes such as indigo to the yarn is low, the yarn is usually required to be subjected to a multi-pass dip dyeing-oxidation color fixing procedure, and finally the color required by the subsequent clothing processing can be obtained. The existing dyeing process comprises the following steps: the yarn enters a dye vat for dip dyeing in a wet state (the liquid carrying rate is about 85 percent) after being pretreated, boiled and washed, the yarn is fully soaked by dye liquor when running on a guide roller below the liquid level of the dye liquor in the dye vat, meanwhile, because of the affinity action of dye molecules in the dye liquor and yarn fibers, the dye molecules in the dye liquor can continuously transfer (i.e. dye up) to the yarn in the running process of the yarn, the longer the yarn is soaked in the dye liquor, the more the dye transfers to the yarn until the adsorption balance is reached, and in the process, the concentration of the dye liquor can continuously decrease to cause the concentration fluctuation of the dye liquor; after the dip dyeing is finished, the yarns enter a padder (compression roller) above a dye vat for extrusion, and part of dye liquor absorbed by the dip dyeing of the yarns in the extrusion process is extruded by the compression roller and flows back into the dye vat; the extruded yarn (with liquid rate of about 85%) enters an oxidation frame, and in the process of running the yarn on a guide roller of the oxidation frame, the reductive dye in the dye liquor absorbed by the yarn is oxidized and then is fixed on the fiber, so that the single-pass dyeing process is completed. In actual production, the procedures are repeated for many times according to the process requirements.
In the dyeing process of the yarn, the dye liquor is slightly consumed except for the trace diffusion to the air, but the dye in the dye liquor is more quickly consumed due to the adsorption dyeing with yarn fibers, the concentration of the dye liquor in a dye vat is gradually reduced along with the lapse of dip dyeing time, so that the color dyed by the yarn in the early stage is darker than that dyed by the yarn in the later stage, and the serious color difference phenomenon is caused. In order to overcome the technical problem, the current common technical scheme is to intensively reflux the dye liquor of each dye vat into a filter box by a pipeline, add the dye liquor with higher concentration into the filter box for regulation by experienced color matching workers according to factors such as the yarn dyeing rate, the dyeing time and the like, and then convey the dye liquor back to each dye vat by a circulating pump, so that the concentration of the dye liquor in the dye vat is basically kept unchanged, and the yarn dyeing effect tends to be consistent.
However, the method of manually adding the high-concentration dye solution is a stress measure, that is, after the color change of the yarn is observed, the dye solution is supplemented, and this method cannot completely solve the color difference problem, but only reduces the fluctuation range of the color difference, and moreover, the method is positively correlated with the experience of the staff, and the different experiences of different staff directly cause the different fluctuation ranges of the color difference of a batch of cloth, so that it is necessary to provide a yarn dyeing process to overcome the technical problems.
Disclosure of Invention
The invention firstly solves the technical problems that: the process for dyeing the yarns by adopting the vat dye can stabilize the dye-uptake and narrow the fluctuation range of chromatic aberration in the whole dyeing process of a batch of yarns.
In order to solve the technical problems, the invention adopts the technical scheme that: a process for dyeing yarn by vat dyes comprises the following steps:
a. dip dyeing: the liquid carrying rate is X1The yarn is led into a dye vat, the yarn is led out after being immersed in dye liquor in the dye vat and moving for a certain distance, and the yarn is extruded by a compression roller to control water, so that the liquid carrying rate of the yarn is kept at a preset value Y1，Y1>X1；
b. And (3) oxidation: b, introducing the yarn subjected to the step a into an oxidation frame, oxidizing the yarn on the oxidation frame, and dehydrating the yarn to ensure that the liquid carrying rate of the yarn after the yarn is oxidized is X2，X2＜Y1；
c. Repeating the step a to the step b for multiple times to gradually deepen the color of the yarn until the color of the yarn meets the requirement; the liquid carrying rate before the yarn dip dyeing is X when the step a is repeated for the nth timenThe liquid carrying rate after extrusion water control is YnAnd the liquid carrying rate of the yarn in the nth repeated step b when the oxidation is finished is Xn+1，n≥1；
The number of the dye vats and the oxidation racks is not less than the number of times of repeating the step a and the step b, the actual times of the step a and the step b correspond to the used dye vats and the used oxidation racks one by one, and when the step a and the step b are alternately performed repeatedly and repeatedly, the corresponding dye vats and the corresponding oxidation racks are respectively adopted for implementing the step a and the step b each time;
while the above steps a are carried out, continuously replenishing the dye liquor with constant concentration in each dye vat at a constant speed respectively to ensure that the liquid level height of the dye liquor in each dye vat is kept constant or fluctuates within a preset range; when the step b is carried out, the oxidation condition, the oxidation process and the dehydration rate of each step b are respectively kept constant, and the corresponding yarn liquid carrying rate X is obtained after the step b of any pass is completedn+1And is kept constant throughout the dyeing process of the yarn.
Preferably, in the step a, after the yarn enters the dye liquor, the yarn is squeezed by a press roll to discharge air in the yarn.
Preferably, in step a, the yarn is led out from the dye liquor and directly enters the inert gas protection environment, and the yarn is guided to run for a certain distance in the inert gas protection environment before and/or after the water is controlled by the compression of the compression roller.
As a preferable scheme, before the step a, the method further comprises the following steps of d: wetting the yarn to make the liquid carrying rate of the yarn be X1The specific wetting mode comprises the steps of spraying impregnating solution on the dry yarns or immersing the dry yarns into the impregnating solution, and then controlling the liquid carrying rate of the yarns to be X through dehydration treatment1。
As a preferred embodiment, X1~ Xn+1Are all equal to Y1~ YnEqual, the initial volume and concentration of the dye liquor in each dye vat are equalThe equal, the liquor replenishing speed and liquor replenishing concentration of each dye vat are the same, the moving speed and distance of the yarn in each dye vat are the same, and the oxidation condition, the oxidation process and the dehydration rate of each oxidation step are the same.
The beneficial effects of the above technical scheme are: the method is characterized in that the liquid carrying rate of the yarn before and after each dip dyeing is controlled to be constant, dye liquor with constant concentration is supplemented to each dye vat at a constant speed, the liquid level of the dye liquor in each dye vat is kept constant or fluctuates within a certain range, and a constant oxidation environment is maintained at the same time, so that after each dye vat is used for dip dyeing the yarn for a period of time, the concentration of the dye liquor in the dye vat is balanced, then the dye effect of the dye vat on the yarn subjected to dip dyeing can be balanced, and after the concentration of the dye liquor in all the dye vats is balanced, the fluctuation range of front and back color difference is reduced or even eliminated in the continuous dyeing process of the yarn.
The yarn is dehydrated in the yarn oxidation step, the liquid carrying rate after the yarn is oxidized is reduced, more new dye liquor can be absorbed more quickly when the yarn is dip-dyed every time, the liquid absorption amount of the yarn in a dye vat is improved, the permeation effect of the dye liquor on the interior of the yarn is improved through the increase of the liquid absorption amount, the adsorption effect of dye molecules and fibers is improved, and the dye uptake rate in the dip-dyeing-oxidation process every time is improved. The dye vat adopts a direct quantitative and fixed concentration material supplementing mode, has no human interference factors, reduces dyeing fluctuation to the maximum extent, and reduces the requirements of operation on the technology and experience of workers.
Furthermore, according to the technical scheme, the submerged nip point is added when the yarn enters the dye liquor, the nip point can squeeze air in the yarn fibers in advance, the negative pressure effect formed by the recovery of the fiber shape after the yarn leaves the nip point is utilized, the dye liquor is adsorbed into the fibers, the permeation effect is improved, the dye uptake rate is improved, the speed of the yarn for absorbing the dye liquor is improved, the time required by the yarn for absorbing the dye liquor is shortened, the running distance of the yarn in the dye liquor is further shortened, the combination time of the yarn and the dye in the dye liquor is shortened, the concentration reduction rate of the dye liquor is reduced, the small-bath-ratio dyeing of a small dye vat is realized, the dye liquor retention time is reduced, the dye liquor update rate is improved, and the dyeing fluctuation is reduced.
Furthermore, the technical scheme leads the yarn to continuously and fully adsorb and diffuse the dye liquor carried by the yarn by guiding the yarn to run for a certain distance in the inert gas, prolongs the combination time of the fiber and the dye, improves the adsorption effectiveness, reduces dyeing flooding and improves the dyeing color fastness. After the yarn is dip-dyed, the effective time of mutual adsorption of dye molecules and fibers is prolonged, the dye uptake is improved, the number of dye vats required by the whole process is reduced, and the process flow is shortened by long-time operation in an inert gas environment.
Furthermore, the technical scheme keeps the parameters of the dyeing process of each pass consistent, so that the parameters of the dye vat for replenishing the dye liquor can also be kept consistent, thereby reducing the control difficulty of the dyeing depth and the operation difficulty of replenishing the dye liquor.
On the contrary, the dyeing efficiency of each pass is different by setting the dyeing process parameters of each pass differently, such as the front pass is deep, the back pass is shallow, and the final dyeing precision of the yarn can be improved.
The invention further aims to solve the technical problems that: according to the process for dyeing the yarn by adopting the vat dye, a yarn dyeing system is provided to reduce the color difference fluctuation range of the yarn.
In order to solve the technical problems, the invention adopts the technical scheme that: the utility model provides a yarn dyeing system, include a plurality of dye vats that follow the yarn direction of rising and going to the downstream side that the direction was arranged in proper order and with the oxidation frame of dye vat one-to-one, arbitrary oxidation frame is close to the downstream side that corresponds the dye vat, be provided with at least one guide yarn in arbitrary dye vat and through the dip-dye roller of dye liquor, rotate on arbitrary oxidation frame and be connected with many oxidation deflector rolls, still include the compression roller of a pair of mutual crimping that is located between the dye vat that corresponds each other and the oxidation frame, be used for to replenishing the fluid replacement device of dye liquor and the dewatering device that corresponds with oxidation frame one-to-one in each dye vat, a pair of compression roller is used for controlling the liquid-carrying rate of the yarn that leaves the dye vat, the fluid replacement device is used for replenishing the dye liquor in the dye vat, dewatering device is used for dehydrating the yarn on the oxidation frame.
Preferably, at least one prepressing roller is arranged in each dye vat, the prepressing rollers are abutted against the dip dyeing rollers, and the pressure welding point is positioned below the liquid level of the dye liquor.
As a preferred scheme, the upper opening of any dye vat is connected with a sealing cover in a sealing manner, a plurality of diffusion guide rollers parallel to dip-dyeing rollers are rotationally connected in the sealing cover, a liquid seal structure is formed below the liquid level inserted into the dye vat 1 along the lower edge of an upstream end plate of the sealing cover, a gap is reserved between the upstream end plate of the sealing cover and the upstream end plate of the dye vat to form a yarn inlet, a yarn outlet and a plurality of air inlets are further formed in the sealing cover, the air inlets are communicated with an inert protective gas source, an oxidation frame corresponding to any dye vat is positioned on the downstream side of the sealing cover connected with the dye vat, and a pair of compression rollers are positioned in the sealing cover and positioned at the upstream of all the diffusion rollers or positioned at the downstream of all the diffusion rollers or positioned at the midstream of all the diffusion rollers.
As a preferable scheme, the dehydration device on the oxidation frame is at least one of a heating device, an air blowing device and a negative pressure water absorption device, wherein the heating device is a drying cylinder integrated on the oxidation guide roller.
Preferably, a soaking cylinder is arranged on the upstream side of the dye vat at the upstream end, and a pair of press rolls and a dewatering device are sequentially arranged between the soaking cylinder and the adjacent dye vat at the downstream end along the upstream direction.
The invention has the beneficial effects that: the method controls the liquid carrying rate of the yarn before and after each dip dyeing to be constant, supplements the dye liquor with constant concentration to each dye vat at constant speed, keeps the liquid level of the dye liquor in the dye vat constant or fluctuates in a certain range, and maintains constant oxidation environment, so that the dye liquor concentration in the dye vat of each dye vat reaches balance after the yarn is subjected to the dip dyeing for a period of time, the dye-uptake effect of the dye vat on the yarn subjected to the dip dyeing in the dye vat can reach balance, and after the dye liquor concentrations in all the dye vats reach balance, the fluctuation range of the front and back color difference is reduced or even eliminated in the continuous dyeing process of the yarn.
The yarn oxidation process is further controlled in a heating or ventilating mode in the yarn oxidation process, so that the liquid carrying rate of the oxidized yarn can be reduced, the yarn can absorb more new dye liquor more quickly during each dip dyeing, the permeation effect of the dye liquor on the interior of the yarn is improved through the increase of the liquid absorption amount, the adsorption effect of dye molecules and fibers is improved, and the dye uptake of each dip dyeing-oxidation process is improved.
The invention further adopts the prepressing roller to prepress the yarn to discharge the air in the yarn, so as to realize that the yarn quickly absorbs a large amount of dye liquor in the elastic redressing process, thereby shortening the dipping time of the yarn in the dye liquor, further reducing the total amount of dye in the dye liquor transferred to the yarn due to affinity, and reducing the fluctuation range of the concentration of the dye liquor in the dye vat. Affinity refers to the ability of the dye in the dye liquor to transfer automatically to the fiber.
And the yarn is protected by inert gas through the sealing cover, so that the yarn continuously and fully adsorbs and diffuses dye liquor carried by the yarn, and the time for combining the fiber and the dye is prolonged, thereby ensuring the color fastness of yarn dyeing, reducing the number of dye vats required by the whole process, and shortening the process flow.
Drawings
The following detailed description of embodiments of the invention is provided in conjunction with the appended drawings, in which:
FIG. 1 is a schematic view of the dyeing system according to the present invention;
FIG. 2 is a schematic view of another embodiment of the dyeing system of the present invention;
in fig. 1 and 2: 1. the dyeing device comprises a dye vat, 2, an oxidation frame, 3, a dip dyeing roller, 4, an oxidation guide roller, 5, a press roller, 6, a liquid supplementing device, 601, a liquid supplementing pipe, 602, a dye liquid storage tank, 603, a liquid supplementing pump, 7, a dewatering device, 8, a soaking vat, 9, a prepressing roller, 11, a sealing cover, 12, a diffusion guide roller, 13, a yarn inlet, 14, a yarn outlet, 15, an air inlet, 16 and an inert protective gas source.
Detailed Description
Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Example 1:
referring to fig. 1, the process for dyeing yarn with vat dye according to this embodiment includes the following specific steps:
a. dip dyeing: the liquid carrying rate is X1The yarn 100 is led into a dye vat 1, the yarn 100 is led out after being immersed in dye liquor in the dye vat 1 and moving for a certain distance, and water is controlled by extrusion of a pair of press rollers 5, so that the liquid carrying rate of the yarn 100 is kept at a preset value Y1，Y1> X1。
b. And (3) oxidation: introducing the yarn 100 subjected to the step a into an oxidation frame 2, oxidizing the yarn on the oxidation frame 2, and simultaneously dehydrating the yarn 100 to ensure that the liquid carrying rate of the yarn 100 subjected to oxidation is X2；，X2＜Y1. The specific way of dewatering is to perform at least one of heating, blowing and negative pressure adsorption on the yarn 100.
c. And (c) repeating the steps a to b for a plurality of times to gradually deepen the color of the yarn 100 until the color of the yarn 100 meets the requirement. The liquid carrying rate before the yarn dip dyeing is X when the step a is repeated for the nth timenThe liquid carrying rate after extrusion water control is YnAnd the liquid carrying rate of the yarn in the nth repeated step b when the oxidation is finished is Xn+1，n≥1。
The number of the dye vat 1 and the oxidation rack 2 is not less than the repetition times of the step a and the step b, and the optimal scheme is equal, so that the dye vat 1 and the oxidation rack 2 are not left unused. As shown in FIG. 1, the actual times of steps a and b are corresponding to the used dye vat and oxidation rack, and when steps a to b are repeated for multiple times, the corresponding dye vat 1 and oxidation rack 2 are respectively used for each step a and step b.
While the above steps a are carried out, continuously replenishing the dye liquor with constant concentration in each dye vat 1 at a constant speed respectively to ensure that the liquid level height of the dye liquor in each dye vat 1 is kept constant or fluctuates within a preset range; and (b) when the step (b) is carried out, the oxidation condition, the oxidation process and the dehydration rate of each step (b) are respectively kept constant, and the corresponding yarn liquid carrying rate Xn +1 after any step (b) is finished is kept constant in the whole yarn dyeing process.
Specific methods for maintaining the level of the liquor constant or fluctuating within a predetermined range include overflowAnd a replenishment quantity control method, wherein the overflow method is characterized in that an overflow port is formed in the dye vat 1, the dye liquor replenishment quantity is larger than the consumption quantity, and more replenished dye liquor overflows from the overflow port to be discharged, so that the liquid level of the dye liquor in the dye vat 1 is kept constant. The replenishment amount control method is a method of controlling the amount of the replenishment solution by calculating the consumption amount of the dye solution, and for example, in the first step a, when the yarn 100 is extruded and controlled in water by the pair of press rolls 5 during the step a, and the extruded solvent is returned to the dye vat 1, the dye solution replenishment amount is equal to Y1-X1When the yarn is extruded by the press roller 5 to control water in the process of step a, the extruded solvent is discharged out of the dye vat 1, and the mass of the solvent discharged out of the dye vat 1 in unit time due to extrusion of the press roller 5 is set as Z1The dye liquor replenishment amount is equal to Y1-X1+Z1。Z1Accurate values can be obtained by experimentation.
The overflow method is adopted to control the liquid level of the dye liquor, the operation is simple, the liquid level control effect is stable, but larger pollution and dye liquor waste can be brought, and the cost is larger. And the replenishment quantity control method is adopted to control the dye liquor level, the control difficulty is relatively high, the control of the dye liquor level is relatively stable, and meanwhile, the air pollution and dye waste caused by dye liquor overflow can be eliminated, so the replenishment quantity control method is better for controlling the dye liquor level.
On the basis that the liquid level height of the dye liquor is kept unchanged, the constant moving speed of the yarns 100 in the yarn dyeing process is combined, so that the time that each section of yarns 100 passes through any one dye vat 1 is constant, when the concentration of the dye liquor is kept unchanged, the amount of dye in the dye liquor in the dye vat 1 can be absorbed by each section of yarns 100 is also constant, and when the concentration of the dye liquor is reduced, the amount of dye in the dye liquor can be absorbed by each section of yarns 100 is also reduced, therefore, in the process of continuously adding the dye liquor with the constant concentration into the dye vat 1, when the concentration of the dye liquor in the dye vat 1 is reduced to the amount of dye in the dye liquor absorbed by each section of yarns 100 is consistent with the amount of dye in the newly added dye liquor, the concentration of the dye liquor in the dye vat 1 is balanced, and then the amount of dye absorbed by each section of yarns 100 when passing through the dye vat 1 can be kept constant, namely, the dyeing rate of the yarns 100 is balanced, the chromatic aberration is reduced to fluctuation within a small range or even eliminated directly.
In this embodiment, before step a, the method further includes step d of wetting: wetting the yarn 100 such that the liquid carrying rate of the yarn 100 is X1The specific wetting mode comprises the steps of spraying impregnating solution on the dry yarn or immersing the dry yarn into the impregnating solution, and then controlling the liquid carrying rate of the yarn 100 to be X through dehydration treatment1. The specific operation mode of the dewatering treatment can be one or more of pressing roll extrusion water control, negative pressure adsorption water control and heating water control, and the liquid carrying rate of the yarn 100 can be controlled by other known dewatering treatment modes.
In the step d, it is preferable to use the dye solution solvent in the dye vat 1 in the step a as the immersion liquid, and the dye solution solvent is a liquid for dissolving the dye in the dye vat 1.
The working solution without dye is used as the wetting solution to wet the yarn, so that the condition that the yarn brings clear water into the dye vat to reduce the concentration of the dye solution in the dye vat is avoided, the variation range of the concentration of the dye solution is further reduced, and the dyeing color difference on the yarn is reduced. And dissolving the dye in the working solution to form the dye solution.
As a further optimized technical solution, X in this embodiment1~ Xn+1Are all equal to Y1~ YnThe equal volume, the equal concentration of the initial volume of the dye liquor in each dye vat, the equal liquor replenishing speed and liquor replenishing concentration of each dye vat, the consistent moving speed and distance of the yarn in each dye vat, the consistent oxidation conditions, oxidation process and dehydration rate of each oxidation step. The method has the advantages that the dyeing effect with basically consistent effect can be obtained by implementing the steps a-b each time, and the dyeing effect is easier to control. And the management of each dye vat 1 is the same, and the concentration and the speed of the dye liquor replenished in each dye vat 1 can be kept consistent, so that the operation difficulty is greatly reduced, the concentration of the replenished dye liquor is the same, the liquor replenishing speed is the same, a liquor replenishing system of the dye liquor can be simplified, and the production cost is reduced. More importantly, the dye liquor in each dye vat 1 can basically and synchronously reach the concentration balance point of the dye liquor in the dyeing process so as to enter a stable dyeing stage as soon as possible.
The further optimized scheme can be refined to the control of the dye liquor temperature in the dye vat and the workshop humidity so as to further reduce the dye uptake of each dyeing pass of the yarn 100.
Of course, in X1~ Xn+1、Y1~ YnWhen the difference exists, the technical problem to be actually solved can be solved, because each step a-step b automatically reaches a dye liquor concentration balance point in the yarn dyeing process, the color difference range of the yarn 100 is narrowed finally, only the time required for the dye liquor concentration corresponding to each step a-b to reach the balance point is short, the dye uptake of the yarn in each step a-b is different, and the control difficulty of the yarn 100 dyeing process is increased.
Example 2:
on the basis of example 1, we have found that, for the first execution of step a, in order to allow the yarn 100 to absorb enough dye liquor in the vat 1, at least the liquor pick-up when it leaves the dye liquor is greater than Y1Therefore, it is necessary to guide the yarn 100 to move a long distance in the dye liquor, as shown in fig. 1, in this process, due to the affinity of the yarn 100 and the dye, the dye is excessively absorbed by the yarn 100, that is, when the yarn finally leaves the dye liquor, the concentration of the dye liquor carried by the yarn 100 is far greater than that in the dye liquor in the dye vat 1, so that the concentration of the dye liquor in the dye vat 1 is reduced, and the color difference range of the yarn 100 is still large before the concentration of the dye liquor in the dye vat 1 reaches the equilibrium, but the current means for inhibiting the adverse effect is to enlarge the dye vat 1, and the reduction speed of the concentration of the dye liquor in the dye vat 1 is reduced by adopting a large-volume dye liquor manner, so as to inhibit the fluctuation range of the color difference of the yarn 100, and because the amount of the dye liquor carried away by the yarn is very small compared with the dye liquor in the dye vat 1, a new dye liquor with higher concentration needs to be supplemented to maintain the concentration of the original large-volume dye liquor to finally reach the equilibrium, on the basis of large volume of dye liquor, the diffusion time of high-concentration dye liquor can be prolonged, so that the concentration of the dye liquor in the dye vat 1 is uneven, and the problem of color difference of yarns in the same batch is caused.
In this embodiment, based on embodiment 1, as shown in fig. 2, after the yarn 100 enters the dye vat 1, the yarn 100 is squeezed to immerse the yarn 100 in the dye solution in a compressed state, and as shown in fig. 2, after the yarn 100 is squeezed, since the yarn 100 is re-tensioned after passing through the nip point (the process of recovering the form), the dye solution is rapidly absorbed, so that the time for the yarn 100 to absorb a sufficient amount of the dye solution is greatly shortened, that is, the path of the yarn 100 in the dye vat 1 is shortened, the affinity absorption process of the yarn 100 and the dye in the dye solution is shortened, and the amount of decrease in the concentration of the dye solution in the dye vat 1 is reduced. The technology can bring a plurality of beneficial technical effects, one can reduce the dye vat 1, reduce the using amount of the dye liquor, reduce the environmental pollution and reduce the production cost, the other can shorten the time for the concentration of the dye liquor in the dye vat 1 to reach the balance, namely, the color difference range of the yarn 100 before the concentration of the dye liquor in the dye vat 1 reaches the balance, and the other can reduce the concentration difference between the dye liquor in the dye vat 1 and the newly-added dye liquor, thereby reducing the concentration unevenness of the dye liquor in the dye vat 1 and reducing the color difference of the yarn 100 in the same batch.
Meanwhile, in order to ensure the bonding effect between the fibers in the yarn 100 and the dye in the dye solution and avoid the color floating phenomenon, in step a, the yarn 100 is led out from the dye solution and directly enters the inert gas protection environment, after the pair of press rolls 5 squeeze and control water, the yarn is led to run for a certain distance in the inert gas protection environment, and then step b is performed. In the inert gas protection environment, the dye liquor carried by the yarn 100 is fully diffused in the yarn 100, the dye is fully combined with the fiber, and the oxidation is carried out in the subsequent step b, so that the color fastness of the yarn 100 is effectively ensured.
In this embodiment, the pressing of the press rolls 5 on the yarn 100 can be arranged at any position of the yarn 100 in the inert gas protection environment, and the number of pairs of the press rolls 5 can be one pair, two pairs or more, and most preferably, a pair of press rolls 5 is used to press the yarn 100 properly when the yarn 100 just exits from the dye vat 1, so that the liquid ratio in the yarn 100 is greater than YnAnd the dye liquor flowing phenomenon does not occur, after the yarn 100 moves for a certain distance in the inert gas protection environment and fully absorbs the dye, a pair of compression rollers 5 are used for extruding the yarn 100, so that the liquid carrying rate of the yarn 100 reaches Yn。
The inert gas environment is usually a nitrogen or argon environment, and other known inert gases may be used to protect the diffusion of the dye in the yarn 100, as long as the dye solution is prevented from contacting oxygen and the dye is prevented from being oxidized and separated out.
Example 3:
as shown in fig. 1, a yarn dyeing system according to the present invention is used for implementing the dyeing process described in embodiment 1, and the yarn dyeing system includes a plurality of dye vats 1 arranged in sequence in the upstream and downstream directions of a yarn 100 and oxidation racks 2 corresponding to the dye vats 1 one by one, and any oxidation rack 2 is located immediately downstream of the corresponding dye vat 1, and in this embodiment, in order to shorten the running distance of the yarn 100 and reduce the floor area of the yarn dyeing system, the oxidation rack 2 corresponding to the dye vat 1 is located directly above the dye vat 1, and in actual operation, the oxidation rack 2 may be located on the downstream side of the upstream dye vat 1 and is located immediately adjacent to the dye vat 1. At least one dip dyeing roller 3 for guiding the yarn 100 to pass through the dye liquor is arranged in any dye vat 1, the number of the dip dyeing rollers 3 can be set according to the stroke of the yarn in the dye liquor, a plurality of oxidation guide rollers 4 are connected to any oxidation frame 2 in a rotating manner, and the yarn dyeing system further comprises a pair of compression rollers 5 which are positioned between the dye vats 1 and the oxidation frames 2 and are in mutual compression joint, a liquor supplementing device 6 for supplementing the dye liquor into each dye vat 1 and a dewatering device 7 which is in one-to-one correspondence with the oxidation frames 2. The pair of press rolls 5 is used for controlling the liquid carrying rate of the yarn 100 leaving the dye vat 1, the liquid replenishing device 6 is used for replenishing the dye liquor into the dye vat 1, and the dewatering device 7 is used for dewatering the yarn 100 on the oxidation rack 2.
In this embodiment, the specifications of the dye vats 1 are the same and the specifications of the oxidation racks 2 are the same without considering the error, so that the management and the operation are convenient. In actual production, the specifications of the dye vats 1 and the specifications of the oxidation racks 2 may be different, but as long as the oxidation conditions of the oxidation racks 2 are not changed in the yarn dyeing process, the process control for reducing the yarn color difference is complicated and difficult only when the oxidation racks are used.
The liquor replenishing device 6 is used for replenishing the dye liquor into each dye vat 1, in the embodiment, the liquor replenishing device 6 comprises a dye liquor storage tank 602 and a liquor replenishing pipe 601 for communicating the dye liquor storage tank 602 with the dye vat 1, a liquor replenishing pump 603 is arranged on the liquor replenishing pipe 601, and the liquor replenishing speed of the dye vat 1 can be controlled by controlling the liquor replenishing pump 603. The mode of communication between the liquor replenishing pipe 601 and the dye vat 1 is various, and one end of the liquor replenishing pipe 601 can be directly connected to the wall of the dye vat 1 below the liquid level of the dye liquor, as shown in fig. 1. It is also possible to suspend one end of the replenishment pipe 601 on the top of the dye vat 1 and perform replenishment by spraying (not shown).
The dewatering device 7 is used for dewatering the yarn 100 on the oxidation tower 2. The dehydration device 7 that can be used includes at least one of a heating device, a blowing device, and a negative pressure water absorption device, and in this embodiment, the heating device is used as the dehydration device 7, and the specific heating device is a drying cylinder integrated on the oxidation guide roller 4. In the specific implementation process, the heating device can also be a blowing device fixed on the oxidation rack 2, such as a hot air blower, a blower fan, or an electric heating rod fixed on the oxidation rack 2.
As shown in fig. 1, a soaking cylinder 8 is further provided on the upstream side of the dye vat 1 at the upstream end, and a pair of press rolls 5 and a dewatering device 7 are sequentially provided between the soaking cylinder 8 and the dye vat 1 adjacent downstream thereof in the upstream and downstream directions. A pair of rolls 5 and a dewatering device 7 are used to control the wet pick-up of the yarn 100 that is initially fed into the vat 1 so that the wet pick-up of the yarn 100 that is fed into the first vat 1 is kept constant.
The working process of the embodiment is as follows: firstly, the yarn 100 is led into a soaking cylinder 8 for soaking, is led out of the soaking cylinder 8 after being fully soaked, is drawn between a pair of compression rollers 5, is extruded by the compression rollers 5 and is dehydrated by a dehydrating device 7, and the liquid carrying rate in the yarn 100 is controlled at a preset value X1In the case where the pressing force between the pair of press rolls 5 and the dewatering rate of the dewatering device 7 to the yarn 100 are not changed, the liquid carrying rate of any one section of the yarn 100 after being pressed and dewatered is kept constant.
The yarn 100 soaked in the soaking cylinder 8 and controlled in liquid carrying rate enters a first dye vat 1 through traction, advances along a dip dyeing roller 3 in the dye vat 1 and absorbs dye liquid, then is drawn to a pair of press rollers 5, and is extruded by the pair of press rollers 5 to control water, so that the yarn is made to enter a first dye vat 1The liquid ratio on the line 100 becomes Y1，Y1＞ X1. This process is the first padding process.
The yarn 100 after being controlled by the controlled liquid structure 5 is drawn to the oxidation frame 2, the yarn 100 is exposed to the air to advance for a certain distance under the guidance of a plurality of oxidation guide rollers 4 on the oxidation frame 2, the dye liquid in the yarn 100 is oxidized by oxygen, and the dye is gradually separated out to show color. In the process, the yarn 100 is heated by the dewatering device 7 (in the embodiment, a drying cylinder is adopted), the higher temperature improves the oxidation efficiency, and meanwhile, the moisture and the solvent carried by part of the yarn 100 are evaporated, so that the liquid carrying rate of the yarn 100 is greatly reduced to X2. This process is the first oxidation process.
Then the yarn 100 is drawn in turn through a second dye vat 1, a second oxidation frame 2, a third dye vat 1 and a third oxidation frame 2, and finally the yarn 100 is drawn out after the color meets the requirements. This example 3 is illustrated in fig. 1, and therefore only three dip-oxidation processes are illustrated, while in actual production the number of dye vats 1 may be as many as a dozen, but the operation is similar to that described above.
The yarn 100 is continuously drawn into the dye vat 1, so that in the whole dip dyeing process, the liquor supplementing device 6 can continuously supplement dye liquor with constant concentration into the dye vat 1, the concentration of the dye liquor in each dye vat 1 can fluctuate initially, and as the dye liquor with constant concentration is continuously supplemented, the concentration of the final dye liquor can reach balance, and at the moment, the yarn enters a main dyeing stage, the color difference of the dyed yarn in the stage is extremely small, and the effect that the color difference cannot be distinguished by naked eyes can be met.
Example 4:
fig. 2 shows another specific structure of the dyeing system of the present invention, which is used for carrying out the yarn dyeing process described in the above example 2. The present embodiment is further optimized based on embodiment 3, in the present embodiment, there are only two dip dyeing rollers 3 in each dye vat 1, but one additional pre-pressing roller 9 is provided, the pre-pressing roller 9 and the two dip dyeing rollers 3 are both pressed and the nip point is located below the liquid level of the dye solution, after the yarn 100 is introduced into the dye solution from the outside, the yarn first winds around one dip dyeing roller 3, then passes through the nip point (first nip point) between the dip dyeing roller 3 and the pre-pressing roller 9, the pre-pressing roller 9 performs first extrusion on the yarn 100, discharges air inside the yarn 100, and during the process of recovering the form after the yarn leaves the nip point, negative pressure is formed inside the yarn 100, so that the dye solution is absorbed into the deep inside of the yarn 100 in a large amount and quickly, the yarn 100 advances around the pre-pressing roller 9 to reach the second pre-pressing point, the yarn 100 is extruded again, discharges a small amount of remaining air and dye solution (because the dye is combined with the fiber, the extruded dye has a low concentration), after passing through the second nip point, the yarn 100 again recovers its form and absorbs a large amount of dye liquor, and is led out of the dye vat 1 after moving a distance around the second dip-dye roller 3.
Meanwhile, in this embodiment, the upper opening of any dye vat 1 is connected with a sealing cover 11 in a sealing manner, a plurality of diffusion guide rollers 12 parallel to the dip dyeing roller 3 are rotatably connected in the sealing cover 11, the lower edge of the end plate at the upstream end of the sealing cover 11 is inserted below the liquid level in the dye vat 1 to form a liquid seal structure, a gap is left between the end plate at the upstream end of the sealing cover 11 and the end plate at the upstream end of the dye vat 1 to form a yarn inlet 13, the sealing cover 11 is further provided with a yarn outlet 14 and an air inlet 15, in this embodiment, the yarn outlet 14 is preferably arranged at the downstream end of the sealing cover 11, the air inlet 15 is arranged at the top of the sealing cover 11, the air inlet 15 is communicated with an inert protective air source 16, and the oxidation rack 2 corresponding to any dye vat 1 is positioned at the downstream side of the sealing cover 11 above the dye vat 1.
The working process of the embodiment is as follows: wetting the yarn 100, which is consistent with embodiment 3, drawing the yarn 100 from a yarn inlet 13 onto a first dip-dyeing roller 3, performing primary liquid absorption, extruding the yarn 100 to discharge internal air and dye liquor when the yarn 100 passes through a nip point between the first dip-dyeing roller 3 and a prepressing roller 9, forming negative pressure in the yarn 100 during the process of recovering the form in the dye liquor after passing through the first nip point, so as to rapidly absorb a large amount of dye liquor, passing the yarn 100 from the dye liquor around the prepressing roller 9, extruding the yarn 100 again when passing through a nip point between a second dip-dyeing roller 3 and the prepressing roller 9, recovering the form of the yarn after passing through the nip point, absorbing a large amount of dye liquor, then leading the yarn out of a dye vat 1 into a nitrogen gas protection environment, leading the yarn 100 into a pair of press rollers 5 for controlling the dye liquor after leaving the dye vat 1, extruding part of the dye liquor in the yarn 100 by the pair of press rollers 5, the liquid carrying rate of the dye liquor in the yarn 100 is larger than Yn, the dye liquor flowing phenomenon does not occur, after the yarn 100 moves for a certain distance in the inert gas protection environment and fully absorbs the dye, the yarn 100 is extruded by a pair of compression rollers 5, the liquid carrying rate of the yarn 100 reaches Yn, and finally the yarn 100 is led out of the sealing cover from the yarn outlet 14. Then the obtained product is drawn to an oxidation frame 2 for oxidation.
The subsequent oxidation process was the same as in example 3 and will not be described further here.
In this embodiment, the structure and the specific working process of the fluid infusion device 6 are the same as those in embodiment 3, and are not described herein again.
Although two pairs of press rollers 5 are used in the same sealing cover 11 in the embodiment, in actual production, only one or more pairs of press rollers 5 may be used, and the position of the press rollers 5 may be adjusted on the yarn moving path in the sealing cover 11 according to actual needs.
In the embodiment, the size of the dye vat 1 can be greatly reduced by improving the specific structure of the dye vat 1 and adding the inert gas protection space formed by the sealing cover 11, so that the using amount of dye liquor is reduced; the retention time of the yarn 100 in the dye liquor is shortened, so that the affinity absorption effect of the yarn 100 and the dye in the dye liquor is weakened, the concentration reduction amplitude of the dye liquor is reduced, the concentration difference between the dye liquor in the dye vat 1 and the newly-added dye liquor is reduced, the diffusion speed of the high-concentration dye liquor is accelerated, the nonuniformity of the concentration of the dye liquor in the dye vat 1 is reduced, the time required by the concentration of the dye liquor in the dye vat 1 to reach balance is shortened, the yarn 100 enters a stable dyeing process in advance, and the dyeing color difference is reduced. The inert gas protection space can provide time for the dye liquor in the yarn to be fully diffused, so that the dye in the dye liquor is fully combined with the yarn fiber, and the color fastness is improved.
Adopt two pairs of compression rollers 5 to make yarn 100 in the in-process that moves in the nitrogen protection environment, the dye liquor volume of self carrying is bigger, and is also bigger to the absorbed quantity of dyestuff, and then improves the single dye-uptake rate of yarn 100.
The working process of the dyeing system described in this example is the process flow for dyeing yarn with vat dye as described in example 1 above.
The above embodiments are merely illustrative of the principles and effects of the present invention, and some embodiments in use, and are not intended to limit the invention; it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications belong to the protection scope of the present invention.
Claims (10)
1. A process for dyeing yarns by adopting vat dyes is characterized by comprising the following specific steps:
a. dip dyeing: the liquid carrying rate is X1The yarn is led into a dye vat, the yarn is led out after being immersed in dye liquor in the dye vat and moving for a certain distance, and the yarn is extruded by a compression roller to control water, so that the liquid carrying rate of the yarn is kept at a preset value Y1，Y1>X1；
b. And (3) oxidation: b, introducing the yarn subjected to the step a into an oxidation frame, oxidizing the yarn on the oxidation frame, and dehydrating the yarn to ensure that the liquid carrying rate of the yarn after the yarn is oxidized is X2，X2＜Y1；
c. Repeating the step a to the step b for multiple times to gradually deepen the color of the yarn until the color of the yarn meets the requirement; the liquid carrying rate before the yarn dip dyeing is X when the step a is repeated for the nth timenThe liquid carrying rate after extrusion water control is YnAnd the liquid carrying rate of the yarn in the nth repeated step b when the oxidation is finished is Xn+1，n≥1；
The number of the dye vats and the oxidation racks is not less than the number of times of repeating the step a and the step b, the actual times of the step a and the step b correspond to the used dye vats and the used oxidation racks one by one, and when the step a and the step b are alternately performed repeatedly and repeatedly, the corresponding dye vats and the corresponding oxidation racks are respectively adopted for implementing the step a and the step b each time;
while the above steps a are carried out, continuously replenishing the dye liquor with constant concentration in each dye vat at a constant speed respectively to ensure that the liquid level height of the dye liquor in each dye vat is kept constant or fluctuates within a preset range; when the step b is carried out, the oxidation conditions, the oxidation process and the oxidation process of the step b are carried out,The dehydration rates are respectively kept constant, and the corresponding yarn liquid carrying rate X is obtained after the step b of any pass is completedn+1And is kept constant throughout the dyeing process of the yarn.
2. The process of claim 1 wherein step a is carried out by extruding the yarn through a nip roller to remove air from the yarn after the yarn enters the dye bath.
3. The process of claim 2, wherein in step a, the yarn is led out of the dye liquor and directly enters the inert gas protection environment, and the yarn is led to run for a certain distance in the inert gas protection environment before and/or after the water is controlled by the compression roller.
4. The process of claim 1, further comprising, before step a, the steps of d, wetting: wetting the yarn to make the liquid carrying rate of the yarn be X1The specific wetting mode comprises the steps of spraying impregnating solution on the dry yarns or immersing the dry yarns into the impregnating solution, and then controlling the liquid carrying rate of the yarns to be X through dehydration treatment1。
5. The process of claim 1, wherein X is1~ Xn+1Are all equal to Y1~ YnThe equal volume, the equal concentration of the initial volume of the dye liquor in each dye vat, the equal liquor replenishing speed and liquor replenishing concentration of each dye vat, the consistent moving speed and distance of the yarn in each dye vat, the consistent oxidation conditions, oxidation process and dehydration rate of each oxidation step.
6. A yarn dyeing system comprises a plurality of dye vats (1) which are sequentially arranged along the upstream and downstream directions of yarns (100) and oxidation racks (2) which are in one-to-one correspondence with the dye vats (1), wherein any oxidation rack (2) is close to the downstream side of the corresponding dye vat (1), at least one dip dyeing roller (3) which guides the yarns (100) to pass through dye liquor is arranged in any dye vat (1), and a plurality of oxidation guide rollers (4) are rotatably connected to any oxidation rack (2), and is characterized by further comprising a pair of compression rollers (5) which are positioned between the corresponding dye vat (1) and the oxidation rack (2) and are in mutual compression joint, a liquid replenishing device (6) which is used for replenishing the dye liquor into each dye vat (1) and dehydration devices (7) which are in one-to-one correspondence with the oxidation racks (2), wherein the pair of compression rollers (5) is used for controlling the liquid carrying rate of the yarns (100) which leave the dye vats (1), and the liquid replenishing device (6) is used for replenishing the dye liquor into the dye vat (1), the dehydration device (7) is used for dehydrating the yarn (100) on the oxidation frame (2).
7. Dyeing system according to claim 7 characterized in that inside each vat (1) there is at least one prepress roller (9), the prepress rollers (9) being in abutment with the dip-dyeing rollers (3) and the crimping point being below the level of the dyeing liquor.
8. The dyeing system according to claim 7, characterized in that the upper opening of any dye vat (1) is hermetically connected with a sealing cover (11), the sealing cover (11) is rotatably connected with a plurality of diffusion guide rollers (12) parallel to the dip dyeing rollers (3), the lower edge of the end plate at the upstream end of the sealing cover (11) is inserted below the liquid level in the dye vat (1) to form a liquid seal structure, a gap is left between the end plate at the upstream end of the sealing cover (11) and the end plate at the upstream end of the dye vat (1) to form a yarn inlet (13), the sealing cover (11) is further provided with a yarn outlet (14) and a plurality of air inlets (15), the air inlets (15) are communicated with an inert protective gas source (16), the oxidation rack (2) corresponding to any dye vat (1) is positioned at the downstream side of the sealing cover (11) connected with the dye vat (1), and a pair of press rollers (5) is positioned in the sealing cover and positioned at the upstream of all diffusion rollers (12) or at the downstream side of all diffusion rollers (12) or at the midstream of all diffusion rollers (12) .
9. Dyeing system according to claim 7 characterized in that the dewatering device (7) on the oxidation rack (5) is at least one of a heating device, a blowing device, a negative pressure suction device, wherein the heating device is a drying cylinder integrated on the oxidation guide roll (4).
10. Dyeing system according to any one of claims 7 to 9, characterized in that a soaking cylinder (8) is arranged on the upstream side of the dye vat (1) at the upstream end, and a pair of press rolls (5) and a dewatering device (7) are arranged between the soaking cylinder (8) and the adjacent dye vat at the downstream end in the up-and-down direction.
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| CN116590939A (en) * | 2023-06-05 | 2023-08-15 | 常州裕源灵泰面料科技有限公司 | High-reproducibility high-level-dyeing-property high-efficiency dyeing process combining acid dyes with different dyeing rates |
| CN117661210A (en) * | 2023-12-23 | 2024-03-08 | 响水县以诺纺织有限公司 | Colored spun yarn coloring machine |
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| CN117661210A (en) * | 2023-12-23 | 2024-03-08 | 响水县以诺纺织有限公司 | Colored spun yarn coloring machine |
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