Full-color-gamut dye liquor color mixing and spray dyeing device and method for preparing colored spun yarn

Abstract

The invention relates to the technical field of colored spun yarns, in particular to a full-color-gamut dye liquor color mixing and spray dyeing device and a method for preparing colored spun yarns. The full-color-gamut dye liquor mixing and spray-dyeing device comprises three dye liquor batching tanks which are respectively used for batching red dye liquor, yellow dye liquor and blue dye liquor, the bottom end of each dye liquor batching tank is provided with a first liquor discharge pipe, and each first liquor discharge pipe is provided with a first proportional valve; the upper end of the dye liquor mixing tank is respectively communicated with each first liquid discharge pipe through a pipeline, and the dye liquor mixing tank is used for mixing and preparing dye; the first atomizing nozzle is arranged below the dye liquor mixing tank, is communicated with the dye liquor mixing tank through a pipeline, and is used for atomizing and spraying the mixed dye liquor to the surface of the fiber. The full-color-gamut spray-dyeing colorful spinning fiber life slivers can be obtained, then production of the full-color-gamut colorful spinning yarn is achieved through the drawing procedure, the technological process is shortened, the color matching efficiency is improved, and meanwhile textile fabric made of the yarn has high color fastness.

Description

Technical Field

[0001] The present invention relates to the technical field of colored spinning, and in particular to a full-color range dye liquor mixing and spray-dyeing device and a method for preparing colored spinning yarn. Background Art

[0002] Mélange yarn utilizes a "dye before spinning" process, revolutionizing traditional textile production and making the production process more energy-efficient and environmentally friendly. Mélange yarn is typically produced using pre-fiber dyeing or fiber solution coloring, followed by traditional spinning. However, to achieve richer and more consistent color effects, color matching and blending are crucial. Color matching is fundamental to color determination, and mélange products rely on the ingenious and scientific color matching of colored fibers to create a diverse and dazzling array of artistic effects.

[0003] The color matching of colored yarn is a physical process, which is neither entirely the additive mixing of light (ACML) nor entirely the subtractive mixing of colorants (SCML). Due to the complexity of colored yarn, most of the colored fibers are pre-mixed in the blow room process during the current color mixing process, and then corrected by the drawing and color correction method. It needs to be determined through dyeing proofing, mixed color proofing, trial spinning and weaving experiments. Due to the low accuracy and low production efficiency, it cannot meet the market demand for rapid production.

[0004] Based on the complexity of color matching, the color matching model was earlier applied in the textile field, mainly including the Friele model, Stearns-Noechel model and Kubelka-Munk theory, etc. However, their algorithms all have certain advantages and disadvantages. In recent years, in order to improve the color matching effect of color spun yarn, CN109582994A discloses a color spun yarn intelligent color selection and matching method, which adopts a modular artificial neural network color selection model and full spectrum color matching calculation to establish a basic monochrome and standard sample database; the monochrome fiber is tested with a spectrophotometer to obtain the monochrome fiber reflectance R i , the monochromatic fiber reflectivity R iThe data is stored in a basic monochrome database, where i = 1, 2, ..., n; samples with known formulas are selected and defined as standard samples, and the overall reflectance Rs data obtained by testing the standard samples with a spectrophotometer is used as the standard sample database. CN115146490A discloses a multi-dimensional gridded dye solution mixing full-color gamut color model and a chromatogram construction method thereof. First, based on gray dye solutions at various dye solution concentrations and various color dye solutions, combined with the discretization of the quality of each dye solution, multi-primary dye solution mixing modes with hue gradient changes, chroma gradient changes, and these two and concentration gradient changes are constructed, and the quality, mixing ratio, and color value of the multi-primary color coupling mixed samples under each mode are obtained respectively. Then, a multi-primary color solution coupling mixed sub-model is constructed under each mode. Then, a full-color phase mixing model of the multi-primary color solution under each mode is constructed respectively. Finally, a circular geometric model of the full-color gamut color space under each mode is constructed respectively.

[0005] Although the above color matching model research has achieved a rich and colorful theoretical system of colors, in the actual production process of colored yarn, in addition to the influence of short fluff on color deviation, its color matching model is a research system based on dye liquid mixing theory. Color spinning achieves color changes through spatial mixing of different colored fibers. Compared with dye liquid mixing, the richness of spatial color mixing needs to be further improved. Summary of the Invention

[0006] In order to solve the technical problems that the traditional color-spinning color matching process is long and inefficient, and the color matching model is difficult to meet the color richness requirements, the present invention provides a full-color range dye liquid mixing spray dyeing device and a method for preparing color-spun yarn. By adjusting the ratio of red, yellow and blue dye liquids and water, the controllable adjustment of different hues, purity and brightness changes of fiber slivers can be achieved, thereby obtaining full-color range spray-dyed bright color spun fiber slivers, and then the colors are mixed through the drawing process to achieve the production of full-color range bright color spun yarn, which shortens the process flow and improves the color matching efficiency. At the same time, the textile fabrics made using the yarn have high color fastness.

[0007] The technical solutions of the present invention are as follows: In a first aspect, the present invention provides a full-color gamut dye solution mixing spray dyeing device, comprising: There are three dye liquid dispensing troughs, which are used to dispense red dye, yellow dye and blue dye respectively. The bottom of each dye liquid dispensing trough is provided with a first liquid discharge pipe, and the first liquid discharge pipe is provided with a first proportional valve; The dye mixing tank has an upper end connected to each first liquid discharge pipe through pipelines, and is used for mixing and preparing the dye; The first atomizing nozzle is arranged below the dye mixing tank and is connected to the dye mixing tank through a pipeline, and is used for atomizing and spraying the mixed dye onto the fiber surface.

[0008] Furthermore, the full-color gamut dye mixing spray dyeing device also includes a water tank for storing water for the dye solution. A second drain pipe is provided at the bottom of the water tank, which is equipped with a second proportional valve. The upper end of the dye mixing tank is connected to the second drain pipe via a pipeline. The function of the device is to add water to the mixed dye to change the dye concentration, thereby further changing the color of the dyed fiber.

[0009] Furthermore, the full-color dye-mixing spray-dyeing device also includes a pretreatment solution tank. A third drain pipe is provided at the bottom of the pretreatment solution tank. A third proportional valve is installed on the third drain pipe. The third drain pipe is connected to a second atomizing nozzle via a pipeline. The second atomizing nozzle is used to atomize the pretreatment solution stored in the pretreatment solution tank and spray it onto the fiber surface. This spraying of the pretreatment solution onto the fiber surface before spray-dyeing promotes subsequent dyeing of the fiber.

[0010] Furthermore, a stirring paddle is provided in the dye mixing tank, and the stirring paddle is connected to the stirring shaft of the stirring motor. The function of the stirring paddle is to fully stir the mixed dye in the dye mixing tank, ensure uniform mixing of the dye, and improve the levelness of the dye.

[0011] Furthermore, both the first and second atomizing nozzles are pulse atomizing nozzles. The function of the pulse atomizing nozzles is that they are controlled by a pulse control system and use high-frequency pulses to control liquid spraying, thereby producing finer dye droplets, making it easier for the dye to penetrate the fibers and dye them, thereby improving the dye uptake and reducing the amount of dye used.

[0012] In a second aspect, the present invention provides a method for preparing a colored spun yarn using a full-color gamut dye solution mixing spray dyeing device, comprising the following steps: S1. Segment the long fiber web to be dyed according to the color distribution rule designed for the dyed yarn; S2. Matching the dye solution required for each color section of the fiber web to obtain the dye solution required for each color section; S3, placing the fiber web in the spraying area of the first atomizing nozzle and moving it under the action of traction; S4, while the fiber web is moving, the dye solution corresponding to each section of the fiber web is sprayed onto the fiber web in sequence through the first atomizing nozzle; S5. The fiber web after spray dyeing is dried to obtain fiber slivers, and several fiber slivers are spun together to obtain colored spun yarns.

[0013] Furthermore, in step S1, the fiber web material includes at least one of cotton fiber, viscose fiber, modal fiber, and lyocell fiber; and in step S2, the dye liquor is a reactive dye liquor or a direct dye liquor, which is suitable for dyeing the aforementioned fibers with reactive dyes or direct dyes.

[0014] Furthermore, in step S2, the method for matching the dye required for each color section of the fiber web includes obtaining a color matching scheme of the required color according to the principle of three primary colors, determining the usage ratio of the single-color dye in the selected dye mixing tank according to the color matching scheme, and discharging the dye into the dye mixing tank for mixing and stirring evenly to obtain the matched dye.

[0015] Furthermore, the discharge flow of the monochromatic dye solution is regulated by a first proportional valve.

[0016] Furthermore, in step S3, the first atomizing nozzle is a pulse atomizing nozzle, and in step S4, the spraying frequency of the first atomizing nozzle is 50-300 times / min.

[0017] Furthermore, in step S4, a pretreatment liquid is sprayed on the surface of the fiber web before spray-dyeing, and the pretreatment liquid is an aqueous solution of sodium carbonate.

[0018] The beneficial effects of the present invention are: (1) The present invention utilizes a full-color range dye liquid mixing spray dyeing device to realize full-color range dye liquid spray dyeing of fibers. By adjusting the ratio of red, yellow and blue dye liquids and deionized water, the fiber slivers can be controlled to have different hues, purities and brightness changes, thereby obtaining full-color range spray-dyed colorful spun cotton strips. The colors are then mixed through the drawing process to realize the production of full-color range dye liquid mixed color spray-dyed colorful spun yarns, thereby enriching the colors of fabric products.

[0019] (2) The present invention solves a series of technical problems caused by the traditional color-spun yarn process of first dyeing the loose fibers, then mixing the colors through a disc, mixing the colors through drawing, and color matching, such as complicated procedures, great quality risks, and inflexible production adjustments. At the same time, it proposes a complete solution to the color deviation problem that occurs when the existing color matching model is combined with the actual color-spun yarn production, making the color of the color-spun products richer and more accurate, and the production operation more convenient and efficient. At the same time, the color fastness of the textiles made by the obtained color-spun yarn of the present invention is good, and the dry / wet friction color fastness and soap washing fastness can reach level 4-5. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0021] Figure 1 It is a structural diagram of Example 1 of the specific implementation method of the present invention.

[0022] Figure 2 This is a physical picture of the colored spun yarn obtained in Example 2 of the specific embodiment of the present invention.

[0023] Figure 3 This is a physical picture of the fabric woven with the colored spun yarn obtained in Example 2 of the specific embodiment of the present invention.

[0024] In the figure, 1-dye liquor mixing tank, 2-water tank, 3-pretreatment solution tank, 4-second atomizing nozzle, 5-second liquid discharge pipe, 6-fiber web, 7-second atomizing nozzle, 8-first atomizing nozzle, 9-stirring paddle, 10-dye liquor mixing tank, 11-first liquid discharge pipe, 12-first proportional valve, 13-second proportional valve, 14-third proportional valve. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0026] Example 1 Combine Figure 1 The present invention provides a full-color range dye solution mixing spray dyeing device, comprising: There are three dye liquid dispensing tanks 1, which are used to dispense red dye, yellow dye and blue dye respectively. The bottom of each dye liquid dispensing tank 1 is provided with a first liquid discharge pipe 11, and the first liquid discharge pipe 11 is provided with a first proportional valve 12; The water tank 2 is used to store water for dyeing liquid. The bottom of the water tank 2 is provided with a second drain pipe 5, and the second drain pipe 5 is provided with a second proportional valve 13; The dye mixing tank 10 has an upper end connected to the first drain pipe 11 and the second drain pipe 5 through pipelines, and is used for mixing and preparing the dye; a stirring paddle 9 is provided in the dye mixing tank 10, and the stirring paddle 9 is connected to the stirring shaft of the stirring motor; The first atomizing nozzle 8 is provided below the dye mixing tank 10 and is connected to the dye mixing tank 10 through a pipeline, and is used to atomize and spray the mixed dye onto the surface of the fiber web 6; A pretreatment solution tank 3 is provided with a third liquid discharge pipe 4 at the bottom of the pretreatment solution tank 3, a third proportional valve 14 is provided on the third liquid discharge pipe 4, and the third liquid discharge pipe 4 is connected to the second atomizing nozzle 7 through a pipeline. The second atomizing nozzle 7 is used to atomize the pretreatment solution stored in the pretreatment solution tank 3 and spray it onto the surface of the fiber web 6.

[0027] The first atomizing nozzle 8 and the second atomizing nozzle 7 of the present invention are both pulse atomizing nozzles. The pulse atomizing nozzles are controlled by a pulse control system. By controlling the liquid injection through high-frequency pulses, they can produce finer dye droplets, making it easier for the dye to enter the fiber and dye, thereby improving the dyeing rate and reducing the amount of dye used.

[0028] Example 2 The colored spun yarn in Example 2 is a spray-dyed colorful 20-count yarn with a regular distribution of brightness such as orange / green / purple, and the fiber is 100% Xinjiang cotton fiber.

[0029] In combination with the full-color gamut dye solution mixing spray dyeing device provided in Example 1, Example 2 provides a method for preparing colored spun yarn, comprising the following steps: (1) The color-spun yarn is designed with orange, green, and purple segments regularly distributed in length. The yarn is segmented into orange, green, and purple segments, and the color length of different segments of the yarn is greater than 1 meter.

[0030] (2) Preparation of dye solution: prepare red, yellow and blue reactive dye solutions respectively, wherein the dye solution is prepared at a mass ratio of deionized water to reactive dye of 100:3; Novaclon Red EC-2BL type is used for reactive red, Novaclon Yellow S-3R type is used for reactive yellow, and Novaclon Blue EC-GC type is used for reactive blue (purchased from commercial sources).

[0031] (3) Preparation of pretreatment solution: cotton fiber pretreatment solution consists of water and Na2CO3, with a mass ratio of water to Na2CO3 of 100:2; (4) The red, yellow and blue primary dye solutions are respectively added to the three dye solution feeding tanks 1, and the discharge ratio of the red, yellow and blue primary dye solutions is controlled by the first proportional valve 12. The cotton fiber pretreatment solution is added to the pretreatment solution tank 3, and the discharge ratio of the pretreatment solution is controlled by the third proportional valve 14; the long strip fiber web 6 is placed in the spraying area of the first atomizing nozzle 8 and the second atomizing nozzle 7, and moves under the action of traction; the third proportional valve 14 is adjusted, and the pretreatment solution is sent to the second atomizing nozzle 7 through the pipeline, and the second atomizing nozzle 7 performs pulse atomization spraying of the pretreatment solution on the fiber web 6, so that the surface of the cotton fiber is wetted and the intermolecular force is opened to facilitate the penetration of the dye solution. The pulse atomizing nozzle sprays a liquid supply of 20L / h, and the nozzle atomization pulse frequency is 200 times / min; The reactive red and reactive yellow dye solutions are added to the dye solution mixing tank 10 in a mass ratio of 1:1, and the reactive red and reactive yellow dye solutions are uniformly mixed by the stirring paddle 9 to obtain an orange mixed dye solution. The orange mixed dye solution is sprayed on the pretreated cotton fiber web by the second atomizing nozzle 7 to obtain an orange combed cotton web, wherein the flow rates of the reactive red and reactive yellow dye solutions are 10 L / h respectively, the stirring paddle speed of the dye solution mixing tank is 400 r / min, the spraying liquid supply of the first atomizing nozzle 8 is 20 L / h, the nozzle atomization pulse frequency is 200 times / min, and the total orange atomization spraying time is 20 seconds. The red dye stops supplying when the orange atomization spray is 15", and the blue dye starts supplying. The reactive yellow and reactive blue dye liquors are added to the dye liquor mixing tank 10 in a mass ratio of 1:1. The reactive yellow and reactive blue dye liquors are uniformly mixed by the stirring paddle 9 to obtain a green mixed dye liquor. The green mixed dye liquor is sprayed on the pretreated cotton fiber web by the first atomizing nozzle 8 to obtain a green carded cotton web. The flow rates of the reactive blue and reactive yellow dye liquors are 10 L / h respectively, the speed of the dye liquor mixing tank stirring paddle is 400 r / min, and the pulse atomizing nozzle sprays the liquid supply at 20 L / h, the nozzle atomization pulse frequency is 200 times / min, and the total green atomization spraying time is 20"; when the green atomization spraying is 15", the yellow dye stops supplying and the red dye starts supplying. The reactive blue and reactive red dye liquors are added to the dye liquor mixing tank 10 in a mass ratio of 1:1. The reactive red and reactive blue dye liquors are uniformly mixed by the stirring paddle 9 to obtain a purple mixed dye liquor. The purple mixed dye liquor is sprayed on the pretreated cotton fiber web by the first atomizing nozzle 8 to obtain a purple combed cotton web. The flow rates of the reactive red and reactive blue dye liquors are 10 L / h, respectively, and the dye liquor mixing ratio is 1:1. The stirring paddle speed of the combining tank 10 is 400r / min, the pulse atomizing nozzle spraying liquid supply is 20L / h, the nozzle atomization pulse frequency is 200 times / min, and the total purple atomizing spraying time is 20"; when the purple is sprayed for 15", the blue dye stops supplying liquid and the yellow dye starts supplying liquid, and the above liquid supply and cotton web spraying method are cycled. At this time, after spraying, the carded cotton web is dried and fixed for color treatment. The drying temperature is 75℃, the cotton web operation time in the drying zone is 20", and the carded cotton sliver is 17.50g / 5m3, to obtain fiber slivers with regular circulation of orange, green and purple.

[0032] (5) In the drawing process, 6 fiber slivers with different hues, purity and brightness are mixed, and then the full-color dye liquid mixed color spray-dyed colorful yarn is produced through the traditional spinning process. Figure 2 The figure shows the finished product of the obtained colored spun yarn. Figure 3 The figure shows the actual fabric woven with the colored spun yarn.

[0033] Example 3 Example 3 is a spray-dyed colorful 40-s yarn with a regular distribution of seven colors such as red / orange / yellow / green / blue / purple / black, and the fiber is 100% Xinjiang cotton fiber.

[0034] Example 3 provides a method for preparing colored spun yarn, comprising the following steps: (1) The specification design of color-spun yarn is that the red, orange, yellow, green, blue, purple and black segments are regularly distributed in length, and the length of yarn of different colors is greater than 0.5 meters.

[0035] (2) Dye solution preparation: prepare mixed dye solutions of red, yellow, and blue reactive dyes and deionized water respectively, wherein the dye solutions are prepared according to a mass ratio of deionized water to reactive dye of 100:3.

[0036] (3) Preparation of pretreatment solution: cotton fiber pretreatment solution consists of water and Na2CO3, and the mass ratio of water to Na2CO3 is 100:2.5.

[0037] (4) The red, yellow and blue primary dye solutions are respectively added to the three dye solution feeding tanks 1, and the discharge ratio of the red, yellow and blue primary dye solutions is controlled by the first proportional valve 12. The cotton fiber pretreatment solution is added to the pretreatment solution tank 3, and the discharge ratio of the pretreatment solution is controlled by the third proportional valve 14; the long strip fiber web 6 is placed in the spraying area of the first atomizing nozzle 8 and the second atomizing nozzle 7, and moves under the action of traction; the third proportional valve 14 is adjusted, and the pretreatment solution is sent to the second atomizing nozzle 7 through the pipeline, and the second atomizing nozzle 7 pulse-atomizes and sprays the pretreatment solution on the fiber web 6, so that the surface of the cotton fiber is wetted and the intermolecular force is opened to facilitate the penetration of the dye solution. The pulse atomizing nozzle sprays a liquid supply of 35L / h, and the nozzle atomization pulse frequency is 300 times / min; The mixing ratio of the three primary dye solutions of red, yellow, and blue in the dye solution mixing tank 10 is controlled by a first proportional valve 12. After the pretreated cotton fiber web, the reactive red dye is sprayed onto the pretreated cotton fiber web through a first atomizing nozzle 8 to obtain a red carded cotton web. The flow rate of the reactive red dye solution is 40 L / h, the speed of the agitator paddle in the dye solution mixing tank is 500 rpm, the pulse atomizing nozzle sprays a liquid supply of 40 L / h, the nozzle atomizing pulse frequency is 300 times / min, and the total reactive red atomizing spraying time is 10". When the active red atomization spray is 7", the active yellow dye liquid starts to be supplied, and at the same time the flow rate of the active red dye liquid is reduced to 20 L / h, and at the same time the flow rate of the active yellow dye liquid is increased to 20 L / h. The two dye liquids are added to the dye liquid mixing tank 10 at a mass ratio of 1:1, and the active red and active yellow dye liquids are uniformly mixed by the stirring paddle 9 to obtain an orange mixed dye liquid. The orange mixed liquid is sprayed onto the cotton fiber web by the first atomizing nozzle 8 to obtain an orange carded cotton web, wherein the stirring speed of the stirring paddle 9 is 500 r / min, the spraying liquid supply of the pulse atomizing nozzle is 40 L / h, the nozzle atomization pulse frequency is 300 times / min, and the total orange atomizing spraying time is 10". When the active orange atomization spraying is 7", the supply of the active red dye solution is stopped, and at the same time the flow rate of the active yellow dye solution is increased to 40 L / h. The active yellow dye is sprayed onto the cotton fiber web through the first atomization nozzle 8 to obtain a yellow carded cotton web. The stirring speed in the dye solution mixing tank 10 is 500 r / min, the pulse atomization nozzle sprays a liquid supply of 40 L / h, the nozzle atomization pulse frequency is 300 times / min, and the total active yellow atomization spraying time is 10". When the active yellow atomization spray is 7", the active blue dye liquid starts to be supplied, and at the same time the flow rate of the active yellow dye liquid is reduced to 20 L / h, and at the same time the flow rate of the active blue dye liquid is increased to 20 L / h. The two dye liquids are added to the dye liquid mixing tank 10 at a mass ratio of 1:1, and the active yellow and active blue dye liquids are uniformly mixed by stirring to obtain a green mixed dye liquid. The green mixed dye liquid is sprayed onto the cotton fiber web by the first atomizing nozzle 8 to obtain a green carded cotton web, wherein the stirring speed of the stirring paddle 9 is 500 r / min, the liquid supply of the pulse atomizing nozzle is 40 L / h, the nozzle atomization pulse frequency is 300 times / min, and the total green atomizing spraying time is 10". When the active green atomization spraying is 7", the supply of the active yellow dye solution is stopped, and at the same time the flow rate of the active blue dye solution is increased to 40 L / h. The active blue dye is sprayed onto the cotton fiber web through the first atomization nozzle 8 to obtain a blue carded cotton web. The stirring speed of the dye solution mixing tank 10 is 500 r / min, the spraying liquid supply of the pulse atomization nozzle is 40 L / h, the nozzle atomization pulse frequency is 300 times / min, and the total active blue atomization spraying time is 10". When the reactive blue atomization spray is 7", the reactive red dye solution starts to be supplied, and at the same time the flow rate of the reactive blue dye solution is reduced to 20 L / h, and the flow rate of the reactive red dye solution is increased to 20 L / h. The two dye solutions are added to the dye solution mixing tank 10 in a mass ratio of 1:1, and the reactive blue and reactive red dye solutions are uniformly mixed by the stirring paddle 9 to obtain a purple mixed dye solution, and the purple mixed dye solution is sprayed onto the cotton fiber web through the first atomizing nozzle 8 to obtain a purple carded cotton web, wherein the dye solution mixing tank stirring speed is 500 r / min, the pulse atomizing nozzle spraying liquid supply is 40 L / h, the nozzle atomization pulse frequency is 300 times / min, and the total purple atomizing spraying time is 10". When the active violet atomization spray is 7", the active yellow dye solution starts to be supplied. At this time, the flow rates of the active red and active blue dye solutions are reduced to 13.3 L / h, and the flow rate of the active yellow dye solution is increased to 13.3 L / h. The three dye solutions are added to the dye solution mixing tank 10 in a mass ratio of 1:1:1. The active red, yellow and blue dye solutions are uniformly mixed by the stirring paddle 9 to obtain a black mixed dye solution. The black mixed dye solution is sprayed onto the cotton fiber web through the first atomizing nozzle 8 to obtain a black carded cotton web. The stirring paddle speed of the dye solution mixing tank is 500 r / min, the pulse atomizing nozzle sprays a liquid supply of 40 L / h, the nozzle atomization pulse frequency is 300 times / min, and the total black atomizing spraying time is 10". When the active black atomized spray reaches 7″, the supply of the active yellow dye solution and the active blue dye solution is stopped. At the same time, the flow rate of the active red dye solution is increased to 40 L / h. The active red dye solution is sprayed onto the cotton fiber web through the first atomizing nozzle 8 to obtain a red carded cotton web. The above operation steps are repeated cyclically to obtain colorful fiber slivers with regularly distributed segments in length.

[0038] (5) In the drawing process, six colorful fiber slivers with different hues, purity and brightness are mixed, and then the traditional spinning process is used to produce a spray-dyed colorful yarn with a full range of dye liquid mixed colors and colorful changing colors.

[0039] Example 4 Example 4 is a spray-dyed colorful 40-s yarn with a regular distribution of red / yellow / blue non-equal brightness gradient colors, and the fiber is 100% Xinjiang cotton.

[0040] Example 4 provides a method for preparing colored spun yarn, comprising the following steps: (1) The specification design of the colored spun yarn is that the red, yellow and blue non-equal brightness gradient effect segments are regularly distributed in length, and the length of the yarn of different colors is greater than 0.3 meters.

[0041] (2) Dye solution preparation: prepare mixed dye solutions of red, yellow, and blue reactive dyes and deionized water respectively, wherein the dye solutions are prepared according to a mass ratio of deionized water to reactive dye of 100:2.5.

[0042] (3) Preparation of pretreatment solution: cotton fiber pretreatment solution consists of water and Na2CO3, and the mass ratio of water to Na2CO3 is 100:2.5.

[0043] (4) The red, yellow and blue primary dye solutions are respectively added to the three dye solution feeding tanks 1, and the discharge ratio of the red, yellow and blue primary dye solutions is controlled by the first proportional valve 12. Deionized water is added to the water tank 2, and the discharge ratio of the deionized water is controlled by the second proportional valve 13. The cotton fiber pretreatment solution is added to the pretreatment solution tank 3, and the discharge ratio of the pretreatment solution is controlled by the third proportional valve 14. The long strip fiber web 6 is placed in the spraying area of the first atomizing nozzle 8 and the second atomizing nozzle 7, and moves under the action of traction. The third proportional valve 14 is adjusted, and the pretreatment solution is sent to the second atomizing nozzle 7 through the pipeline. The second atomizing nozzle 7 pulse-atomizes and sprays the pretreatment solution on the fiber web 6, so that the surface of the cotton fiber is wetted and the intermolecular force is opened to facilitate the penetration of the dye solution. The pretreatment solution pulse atomizing nozzle sprays a liquid supply of 40L / h, and the nozzle atomization pulse frequency is 300 times / min. The reactive red dye solution is controlled by a first proportional valve 12 to enter the dye solution mixing tank 10, and then sprayed onto the pretreated cotton fiber web through a first atomizing nozzle 8. The reactive red dye supply is stopped after 5 inches, and deionized water supply is synchronously started to obtain a red gradient carded cotton web. The flow rates of the reactive red dye solution and deionized water are 20 L / h respectively, the stirring speed of the dye solution mixing tank 10 is 300 r / min, the pulse atomizing nozzle sprays a liquid supply of 20 L / h, the nozzle atomization pulse frequency is 300 times / min, and the total active red gradient atomizing spraying time is 12 inches.

[0044] After 11 inches of reactive red gradient atomization spraying, the deionized water supply is stopped. At this time, the reactive yellow dye solution is controlled by the first proportional valve 12 to enter the dye solution mixing tank 10, and then the reactive yellow dye is sprayed on the pretreated cotton fiber web through the first atomizing nozzle 8. After 5 inches of reactive yellow dye solution supply, the liquid supply is stopped, and the deionized water supply is started synchronously to obtain a yellow gradient carded cotton web. The flow rates of the reactive yellow dye solution and the deionized water are 20 L / h respectively, the stirring speed of the dye solution mixing tank 10 is 300 r / min, the pulse atomizing nozzle sprays a liquid supply of 20 L / h, the nozzle atomization pulse frequency is 300 times / min, and the total time of the reactive yellow gradient atomization spray is 12 inches.

[0045] After 11 inches of reactive yellow gradient atomization spraying, the deionized water supply is stopped. At this time, the reactive blue dye solution is controlled by the first proportional valve 12 to enter the dye solution mixing tank 10, and then the reactive blue dye is sprayed onto the pretreated cotton fiber web through the first atomizing nozzle 8. After 5 inches of reactive blue dye solution supply, the liquid supply is stopped, and the deionized water supply is synchronously started to obtain a blue gradient carded cotton web. The flow rates of the reactive blue dye solution and the deionized water are respectively 20 L / h, the stirring speed of the dye solution mixing tank 10 is 300 r / min, the pulse atomizing nozzle sprays a liquid supply of 20 L / h, the nozzle atomization pulse frequency is 300 times / min, and the total time of the reactive blue gradient atomization spraying is 12 inches.

[0046] After 11″ of reactive blue gradient atomization spraying, the deionized water supply was stopped, and the above steps of obtaining a red gradient carded cotton web were repeated. The above steps were repeated cyclically to obtain a spray-dyed colorful fiber sliver with red / yellow / blue non-isoluminous gradient colors.

[0047] (5) In the drawing process, six spray-dyed colorful fiber slivers with non-equal brightness changes are mixed, and then the traditional spinning process is used to produce spray-dyed colorful spun yarn with red / yellow / blue non-equal brightness gradient colors.

[0048] Comparative Example 1 Comparative Example 1 differs from Example 2 in that it uses a traditional color spinning process, including bulk fiber dyeing, individual slivering, drawing and color mixing, roving, spun yarn, and winding. Table 1 shows a comparison of the production process efficiency of Example 2 of the present invention and Comparative Example 1.

[0049] Table 1 Comparison of production efficiency between the present invention and traditional color-spun yarn production processes

[0050] It can be seen from Table 1 that the present invention is simpler and more efficient than the existing traditional color-spun yarn production process, and the production efficiency is increased by more than 70% compared with the traditional color-spun yarn production efficiency. At the same time, it can achieve full-color gamut dye solution mixing and color matching.

[0051] The present invention solves a series of technical difficulties brought about by the traditional color-spun yarn process of first dyeing the loose fibers, then mixing the colors through a disk, mixing the colors through drawing, and color matching during proofing, etc., such as complicated procedures, great quality risks, and inflexible production adjustments. At the same time, it proposes a complete solution to the color deviation problem that occurs when the existing color matching model is combined with the actual color-spun yarn production, making the color of the color-spun products richer and more accurate, and the production operation more convenient and efficient.

[0052] The colored spun yarns prepared in Example 2 and Comparative Example 1 were respectively used to prepare fabrics of the same specifications through the same weaving process. The color fastness tests of the obtained fabrics were compared. The results are shown in Table 2.

[0053] Table 2 Color fastness test data of fabrics woven from colored spun yarns obtained in Example 2 and Comparative Example 1

[0054] From the comparative data of fabrics of the same specification in Table 2, it can be seen that the fabrics produced by the present invention are compared with the fabrics produced by the colored spun yarn of the same specification. The dry friction fastness, wet friction fastness and soaping fastness of the colored spun yarn of the present invention are all 0.5-1 levels better than those of the conventional colored spun yarn.

[0055] Although the present invention has been described in detail with reference to the accompanying drawings and in conjunction with preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, persons of ordinary skill in the art may make various equivalent modifications or substitutions to the embodiments of the present invention, and such modifications or substitutions shall be within the scope of the present invention. Any changes or substitutions that can be easily conceived by persons skilled in the art within the technical scope disclosed in the present invention shall be within the scope of protection of the present invention.

Claims

1. A full-color range dye liquor mixing spray dyeing device, characterized in that: include: There are three dye liquid dispensing troughs, which are used to dispense red dye, yellow dye and blue dye respectively. The bottom of each dye liquid dispensing trough is provided with a first liquid discharge pipe, and the first liquid discharge pipe is provided with a first proportional valve; The dye mixing tank has an upper end connected to each first liquid discharge pipe through pipelines, and is used for mixing and preparing the dye; The first atomizing nozzle is arranged below the dye mixing tank and is connected to the dye mixing tank through a pipeline, and is used for atomizing and spraying the mixed dye onto the fiber surface.

2. The full-color gamut dye solution mixing spray dyeing device according to claim 1, characterized in that: It also includes a water tank for storing water for dyeing liquid. The bottom of the water tank is provided with a second drain pipe, the second drain pipe is provided with a second proportional valve, and the upper end of the dye mixing tank is connected with the second drain pipe through a pipeline.

3. The full-color gamut dye solution mixing spray dyeing device according to claim 1, characterized in that: It also includes a pretreatment solution tank, a third liquid discharge pipe is provided at the bottom of the pretreatment solution tank, a third proportional valve is provided on the third liquid discharge pipe, the third liquid discharge pipe is connected to the second atomizing nozzle through a pipeline, and the second atomizing nozzle is used to atomize the pretreatment solution stored in the pretreatment solution tank and spray it onto the fiber surface.

4. The full-color gamut dye solution mixing spray dyeing device according to claim 3, characterized in that: A stirring paddle is provided in the dye liquor mixing tank, and the stirring paddle is connected to the stirring shaft of the stirring motor; the first atomizing nozzle and the second atomizing nozzle are both pulse atomizing nozzles.

5. A method for preparing colored spun yarn using the full-color range dye liquor mixing spray dyeing device according to claim 1, characterized in that: The steps include: S1. Segment the long fiber web to be dyed according to the color distribution rule designed for the dyed yarn; S2. Matching the dye solution required for each color section of the fiber web to obtain the dye solution required for each color section; S3, placing the fiber web in the spraying area of the first atomizing nozzle and moving it under the action of traction; S4, while the fiber web is moving, the dye solution corresponding to each section of the fiber web is sprayed onto the fiber web in sequence through the first atomizing nozzle; S5. The fiber web after spray dyeing is dried to obtain fiber slivers, and several fiber slivers are spun together to obtain colored spun yarns.

6. The method according to claim 5, wherein In step S1, the fiber web material includes at least one of cotton fiber, viscose fiber, modal fiber, and lyocell fiber; in step S2, the dye solution is a reactive dye solution or a direct dye solution.

7. The method according to claim 5, wherein In step S2, the method for matching the dye required for each color section of the fiber web includes obtaining a color matching scheme of the required color according to the principle of three primary colors, determining the usage ratio of each single color dye in the selected dye liquid mixing tank according to the color matching scheme, and discharging the dye liquid into the dye liquid mixing tank for mixing and stirring evenly to obtain the matched dye liquid.

8. The method according to claim 7, wherein The discharge flow of the single-color dye solution is adjusted by the first proportional valve.

9. The method according to claim 5, wherein In step S3, the first atomizing nozzle is a pulse atomizing nozzle, and in step S4, the spraying frequency of the first atomizing nozzle is 50-300 times / min.

10. The method according to claim 5, wherein In step S4, a pretreatment liquid is sprayed on the surface of the fiber web before spray-dyeing, and the pretreatment liquid is an aqueous solution of sodium carbonate.

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