Periodic voltage controlled composite yarn space dyeing device and space dyeing method

Abstract

The invention relates to a periodic voltage controlled composite yarn space dyeing device and a space dyeing method, the composite space-dyed yarn is realized based on an array spinning dyeing technology, and intermittent generation of a color nano array is controlled through periodically changing high-voltage static electricity to form fiber strips, rough yarns and yarns with segmented colors. According to the yarn space dyeing device, dye bath and large-scale dyeing equipment do not need to be used, and energy consumption and water consumption are lower; according to the space dyeing method, the process batch is convenient to replace, various samples can be prepared by designing a drawing process, and the products are suitable for proofing and customizing personalized fabrics.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of textile processing, in particular to a compound yarn segment dyeing device controlled by periodic voltage and a segment dyeing method. BACKGROUND

[0002] The color style of textile fabric is an important factor in improving the aesthetic and value of textiles and clothing, so the dyeing of yarn and fabric is a crucial link in the textile industry, directly related to the market competitiveness of products. However, traditional dyeing processes have many problems and challenges.

[0003] Firstly, traditional dyeing processes have high energy consumption, chemical consumption, and water consumption. The main reason is that the dyeing process needs to use fluid media to achieve dye penetration and dyeing on fibers. In order to achieve firm dyeing, a large amount of chemicals (to provide a suitable pH environment and electrolyte concentration) or harsh conditions (temperature, pressure, and time) need to be added in the dye bath, so in the complete textile manufacturing process, dyeing is the concentrated stage of "high emission" problems. Currently, new media and new processes have been used for clean dyeing of textiles. Chinese patent "Ethanol salt-free dyeing and washing method of reactive dyes" (application publication number: CN119287688A), Chinese patent "Water-free supercritical dyeing of denim textiles and process" (authorized publication number: CN116556082B) and other patents use new dyeing media for penetration and dyeing on fabric, reducing dyeing emissions and green environmental protection.

[0004] Secondly, fabrics with special color styles often have higher product power. One of the typical yarn raw materials is segment-dyed yarn. Fabrics made from segment-dyed yarn have bright color styles, lively and natural patterns, and strong three-dimensional effects, which can meet the needs of special groups. The main production methods of segment-dyed yarn include: pure color yarn stripping method (a method for producing pure cotton segment-dyed yarn using a stripping agent, authorized publication number: CN113863036B), bobbin yarn partitioning immersion dyeing method (segment-dyeing process for short color distance segment-dyed yarn, authorized publication number: CN105696231B), skein partitioning immersion dyeing method (a functional rainbow color yarn segment dyeing process, authorized publication number: CN116180354B), and lead yarn partitioning immersion dyeing method (a segment-dyed twisted yarn equipment and its segment-dyed twisted yarn, authorized publication number: CN215481515U). The above-mentioned yarn segment dyeing methods all use dye baths for dyeing, and still have the problems of high water consumption, energy consumption, and cost of traditional dyeing methods. At the same time, since segment-dyed yarn is often related to small-batch fast fashion fabrics, it is difficult to quickly change the dyeing process and recover the dyeing raw materials for large-batch production of segment-dyed yarn.

[0005] Therefore, it is necessary to develop a new type of yarn segment dyeing technology to reduce the energy consumption of color preparation, while enhancing the applicability and fashion attributes of segment-dyed yarn, and broadening the application market of segment-dyed yarn. SUMMARY

[0006] The technical problem solved by the present application is to provide a periodic voltage controlled composite yarn segment dyeing device and a segment dyeing method, which uses modulated voltage to periodically color nanometer array (containing dye) array ionization and embeds into the micron fiber web to realize the dyeing of micron fiber, and the composite fiber strip and the final yarn present the double-color segment dyeing effect of fiber natural color segment + dyed segment or the mixed-color segment dyeing effect of several fiber dyeing segments + several fiber dyeing segments.

[0007] The technical solution adopted by the present application to solve the technical problem is to provide a periodic voltage controlled composite yarn segment dyeing device, which comprises: A negative pressure air suction net curtain for supporting the fiber web and driving it to forwardly convey; A conveying device one and a conveying device two symmetrically arranged on the conveying path of the negative pressure air suction net curtain for synchronously conveying the fiber web; An electrostatic ionization module arranged below the negative pressure air suction net curtain, the electrostatic ionization module comprising a needleless electrostatic ionization nozzle, a high-voltage electrostatic generating device and a liquid supply device; the liquid supply device is in communication with the needleless electrostatic ionization nozzle for conveying the color array solution; the high-voltage electrostatic generating device is electrically connected with the needleless electrostatic ionization nozzle for outputting a periodically changing voltage; A converging device arranged downstream of the conveying device two for converging the fiber web embedded with the color nanometer array into a segment dyed color inlaid fiber sliver.

[0008] As a supplement to the technical solution of the present application, the high-voltage electrostatic generating device is composed of a signal generator and a high-voltage generator, the signal generator uses a function generator to generate a low-frequency periodic signal to access a high-voltage direct current power supply, and the output voltage signal is a periodically changing voltage.

[0009] The present application further provides a segment dyeing method based on the segment dyeing device, comprising the following steps: Step one: mixing the polymer, solvent and dye according to a certain proportion and continuously stirring at room temperature until fully dissolved to obtain a color array solution; Step two: forming the fiber web from the micron fiber raw material by the carding machine after the previous process; Step three: the fiber web is conveyed forwardly under the supporting action of the negative pressure air suction net curtain and sequentially passes through the conveying device one and the conveying device two; the electrostatic ionization module is arranged below the negative pressure air suction net curtain, and the electrostatic ionization module comprises a needleless electrostatic ionization nozzle, a high-voltage electrostatic generating device and a liquid supply device; Step four: color array solution is supplied to the needleless electrostatic ionization nozzle, and the high-voltage electrostatic generator is started to output periodically changing voltage, so as to control the color nanometer array to be ionized upward and periodically embedded into the fiber web, and finally the color mosaic fiber sliver is obtained after the converging device. Step five: the color mosaic fiber sliver is aligned according to different color segments, and then is drawn, roved and spun to obtain the color piece-dyed yarn.

[0010] As a supplement to the technical solution of the application, the polymer in step one is PAN or PVA, and the mass fraction of the polymer is 6-15%; when the polymer is PAN, the solvent is DMF, and when the polymer is PVA, the solvent is water, and the mass fraction of the solvent is 85-94%; the dye content is 2-10% of the mass of the array solution.

[0011] As a supplement to the technical solution of the application, the microfiber in step two is one or more of natural fibers such as cotton fiber and wool fiber, and chemical fibers such as viscose fiber and acrylic fiber, and the diameter of the microfiber is 10-30 μm.

[0012] As a supplement to the technical solution of the application, the dye in the color nanometer array in step four is one or more of reactive dyes, disperse dyes, acid dyes, direct dyes and vat dyes, and the diameter of the color nanometer array is 0-1000 nm.

[0013] As a supplement to the technical solution of the application, the changing range of the periodically changing voltage in step four is 0-60 kV, the frequency is 0.1-3 Hz, and the waveform of the periodically changing voltage includes one or more of sharp pulse, sine, rectangle, bell shape and trapezoidal shape.

[0014] As a supplement to the technical solution of the application, the number of the needleless electrostatic ionization nozzle in step four is 1-6, the receiving distance of the color nanometer array is 10-30 cm, the electrostatic ionization environment temperature is 20-35 ℃, and the relative humidity is 20-80 %RH.

[0015] As a supplement to the technical solution of the application, the frequency of the periodically changing voltage in step four is f, the conveying speeds of the conveying device one and the conveying device two are the same and are V, the piece-dyed length of the color mosaic fiber sliver 7 is L, and L=V× f -1 .

[0016] As a supplement to the technical solution of the application, the length of the basic segment of the color mosaic fiber sliver used in step five is L y, the basic segments include fiber natural segments B and fiber dyed segments R; 3-n segments have different colors R1-R n or different segment lengths 1L y -nL y The segment dyeing basic repeat units that can be realized after the B+R color segments of the certain order are drafted include but are not limited to: B+R n , B+nR, nB+R, nB+nR, R1+R2···+R n , nB+nR 1+ nB+nR2···nR n +nB and the arrangement combinations of the above repeat units.

[0017] Beneficial effects: the present application relates to a kind of period voltage control composite yarn segment dyeing device and segment dyeing method, using needleless electrostatic ionization nozzle preparation color nanometer array and embed the extended micron fiber web upwards, by periodic high-voltage electrostatic generator control color nanometer array periodically intermittent occurrence, realize the segment dyeing effect of composite sliver and yarn, with the characteristics of low energy consumption, low water consumption, low cost.The device used in the present application can batch produce double-color segment dyeing sliver of multiple colors by only replacing multiple array solutions containing different dyes, and only needs to design and replace the color and type of the feeding sliver during the drawing stage to realize complex and diverse multi-color segment dyeing yarn production.The present method is suitable for small sample production of yarn, and is suitable for the characteristics of fast fashion sample production period, small output. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the structural schematic diagram of the device of the present application; Figure 2 It is the mode diagram of one kind of segment dyeing yarn of the present application.

[0019] Illustration: 1, negative pressure air suction net curtain, 2, conveying device one, 3, fiber web, 4, conveying device two, 5, needleless electrostatic ionization nozzle, 6, liquid supply device, 7, color inlaid fiber sliver, 8, converging device. DETAILED DESCRIPTION

[0020] The present application will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present application and not used to limit the scope of the present application. In addition, it should be understood that after reading the content taught by the present application, those skilled in the art can make various modifications or modifications to the present application, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

[0021] The embodiments of the present application relate to a kind of period voltage control composite yarn segment dyeing device and segment dyeing method, as Figures 1-2 shown, the present application provides a kind of period voltage control composite yarn segment dyeing device, the segment dyeing device includes: A negative pressure suction net curtain 1 is used to hold and drive the fiber web 3 forward; A conveying device one 2 and a conveying device two 4 are symmetrically arranged on the conveying path of the negative pressure suction net curtain 1, and are used to synchronously convey the fiber web 3; An electrostatic ionization module is arranged below the negative pressure suction net curtain 1, and the electrostatic ionization module comprises a needleless electrostatic ionization nozzle 5, a high-voltage electrostatic generating device and a liquid supply device 6; the liquid supply device 6 is communicated with the needleless electrostatic ionization nozzle 5 and is used to convey a color array solution; and the high-voltage electrostatic generating device is electrically connected with the needleless electrostatic ionization nozzle 5 and is used to output a periodically changing voltage; A converging device 8 is arranged downstream of the conveying device two 4 and is used to converge the fiber web 3 embedded with the color nanometer array into a segment-dyed color inlaid fiber sliver 7.

[0022] The application provides a segment-dyeing method of the segment-dyeing device, and aims to solve the technical problem of poor environmental protection of segment-dyed yarn dyeing and provides an implementation scheme. The segment-dyeing method of the composite yarn is based on array spinning technology, uses a modulated voltage to periodically ionize a color nanometer array (containing a dye) and embed the color nanometer array into a micron fiber web to realize dyeing of the micron fiber, and the composite fiber sliver and the final yarn present a bicolor segment-dyeing effect of a fiber natural color segment + a dyed segment or a mixed-color segment-dyeing effect of several fiber dyeing segments + several fiber dyeing segments.

[0023] The application also provides a segment-dyeing method of the segment-dyeing device, and the method comprises the following steps. Step one: mixing a polymer, a solvent and a dye according to a certain proportion and continuously stirring at room temperature until the dye is fully dissolved to obtain a color array solution; Step two: forming a micron fiber raw material after a previous process into a fiber web 3 by a carding machine; Step three: driving the fiber web 3 forward under the holding action of the negative pressure suction net curtain 1 and sequentially passing through the conveying device one 2 and the conveying device two 4; arranging an electrostatic ionization module below the negative pressure suction net curtain 1, wherein the electrostatic ionization module comprises a needleless electrostatic ionization nozzle 5, a high-voltage electrostatic generating device and a liquid supply device 6; Step four: supplying the color array solution to the needleless electrostatic ionization nozzle 5 and starting the high-voltage electrostatic generating device to output a periodically changing voltage, so as to control the color nanometer array to be upward ionized and periodically embedded into the fiber web 3, and finally obtaining a segment-dyed color inlaid fiber sliver 7 after passing through the converging device 8; Step five: aligning the color inlaid fiber sliver 7 according to different color segments, drawing, roving and spinning to obtain a color segment-dyed yarn.

[0024] The polymer in step one is PAN or PVA, the mass fraction of the polymer is 6-15%; when the polymer is PAN, the solvent is DMF, when the polymer is PVA, the solvent is water, the mass fraction of the solvent is 85-94%; the dye content is 2-10% of the mass of the array solution.

[0025] Preferably, the microfiber species in step two include but are not limited to one or more of natural fibers such as cotton fibers, wool fibers, and chemical fibers such as viscose fibers, acrylic fibers, etc., and the diameter of the microfiber is 10-30 μm.

[0026] Preferably, the dye in the color nanometer array in step four is one or more of reactive dyes, disperse dyes, acid dyes, direct dyes, vat dyes, etc., and the diameter of the color nanometer array is 0-1000 nm.

[0027] Preferably, the periodic array ionization of the color nanometer array is controlled by a high-voltage electrostatic generator, the output voltage signal of the high-voltage electrostatic generator is a periodically varying voltage, the variation range is 0-60 kV, the frequency of the periodic variation is 0.1-3 Hz, and the periodically varying voltage can output waveforms including but not limited to sharp pulses, sine waves, rectangular waves, bell-shaped waves, trapezoidal waves, etc.

[0028] Preferably, the needleless electrostatic ionization nozzle 5 in step four is a linear ionization nozzle, the number is 1-6, the receiving distance of the color nanometer array is 10-30 cm, the electrostatic ionization environment temperature is 20-35 ℃, and the relative humidity is 20-80 %RH.

[0029] Preferably, the frequency of the periodically varying voltage is f, the conveying speeds of the conveying device one 2 and the conveying device two 4 are the same and are V, the segment dyeing length of the color inlaid fiber sliver 7 is L, L=V× f -1 .

[0030] Preferably, the number of drawing channels in step five is 2 or 4; the roving specification is 3-6 g / 10m, 3-8 T / m; the fineness of the spun yarn is 10-50 ends, 300-800 T / m.

[0031] Preferably, the color inlaid fiber sliver 7 used in the drawing in step five has a basic segment length of L y , the basic segment includes a fiber natural color segment B and a fiber dyed segment R; 3-n fibers have different colors R1-R n or different segment lengths 1L y -nL yThe basic repeat units of the segment dyeing that can be achieved after the B+R color segment must be ordered slivering include, but are not limited to: B+R n , B+nR, nB+R, nB+nR, R1+R2···+R n , nB+nR 1+ nB+nR2···nR n +nB and the permutations and combinations of the above repeat units.

[0032] The present application enables the dye to be carried by the electrostatically ionized nanometer array by adding the dye in the PAN or PVA electrostatic array solution. When the micro fiber web moves forward under the support of the air suction net curtain, the nanometer array is periodically and discontinuously generated to the micro fiber web by the periodical voltage control, so as to realize the segment dyeing effect of the color nanometer array / micro fiber composite fiber strip and yarn.

[0033] The principle of the present application is that under the condition that the speed of the carding doffer and the conveying net curtain is fixed and unchanged, the high-voltage electrostatic generating device outputs the periodical modulated high-voltage electrostatic to the electrostatic ionization nozzle according to a certain waveform and frequency f. When the voltage exceeds the critical voltage of the generation of the Taylor cone of the array solution, the color nanometer array is ionized upward and embedded into the micro fiber web, and the composite fiber sliver in the first half of the period presents the color of the dye. When the voltage is lower than the critical voltage of the generation of the Taylor cone of the array solution, the color nanometer array stops generating, and the "window" is generated on the composite sliver, that is, the composite fiber sliver in the second half of the period presents the natural color of the micro fiber. Therefore, the single composite fiber sliver presents the characteristics of the fiber natural color segment B and the fiber dyeing segment R. When n double-color composite fiber slivers with n colors are slivered according to the set segment position, the composite fiber sliver presents the color mixing segment dyeing effect of the n composite fiber slivers in the segment at each segment position.

[0034] The periodical voltage controlled composite yarn segment dyeing method adopted by the present application has the characteristics of low energy consumption and no need of dyeing medium to realize the penetration of the dye to the yarn. The dye in the color nanometer array will gradually diffuse to the fiber in the finishing process, and finally realize the segment dyeing of the yarn. At the same time, the segment dyeing composite yarn can be changed into various color styles, which greatly improves the fashion attribute of the composite yarn.

[0035] Embodiment 1, the implementation steps include: Step one: 500 g of array solution is configured according to PAN / DMF = 10 / 90, stirred at room temperature for 24 hours until dissolved, 30 g of active red X-3B dye is added to the array solution, and fully dissolved; Step two: after the 100% long cotton bale is opened, it is sent to the carding machine, the doffer speed is set to 20 m / min, and the cotton web is output to the conveying device 2, and the cotton web is collected into a composite sliver after passing through the conveying area, wherein the speed of the conveying device 1 and the conveying device 2 is 22 m / min, and the speed of the collecting device 8 is 24 m / min; Step three: fill the array solution configured in step S1 into the liquid supply device 6, turn on the high-voltage electrostatic generator of the sine wave and set the voltage range to 20 kV-40 kV, the voltage conversion period is 1 Hz, and the color nano array is generated to the cotton web at a time length of 0.5 seconds, the vertical collection distance of the needleless electrostatic ionization nozzle 5 to the cotton web is 25 cm, the number of the needleless electrostatic ionization nozzle 5 is 6, the environmental temperature during electrostatic ionization is 25°C, and the environmental relative humidity is 35% RH; Step four: collect the cotton / nano array composite fiber sliver, and obtain a double-color section dyeing sliver at the collecting device 8, wherein the section dyeing period length L of the sliver is about 36 cm, and the cotton natural color section and the dyeing section each account for half; Step five: use 4 fiber slivers obtained in step four and synthesize 1 slubbing, and the slubbing is slubbed for 2 passes; after the first pass of slubbing, the section dyeing period length L is about 144 cm, after the second pass of slubbing, the section dyeing period length L is about 576 cm, and the slubbing weight is 22.5 g / 5m; the section dyeing slubbing is sent to the roving and spinning process to obtain a yarn, and the specific process is as follows: the roving weight is 5 g / 10m, the twist is 3 T / m, and the speed is 200 rpm; the spun yarn fineness is 30, the twist is 650 T / m, and the speed is 8000 rpm.

[0036] In this embodiment, an alignment method of section dyeing composite sliver is also provided: the fiber natural color of all slivers is taken as the starting point for alignment, and the slivers are arranged in parallel and sent to the simultaneous slubber to ensure that the color basic segments are aligned.

[0037] Figure 2 A mode diagram of the section dyeing yarn provided in this embodiment is shown. In this embodiment, the basic segment is composed of a fiber natural color + active red X-3B segment.

[0038] Embodiment 2, the implementation steps include: Step one: configure 300 g of array solution with PVA1788 / deionized water = 8 / 92, a total of 4 parts, stir for 48 hours at room temperature until dissolved, and add 60 g of cationic blue / red / yellow / turquoise blue dye to each part of the array solution, respectively, and dissolve thoroughly; Step two: the cotton bale and the polyamide bale are opened and sent into the carding machine at a ratio of 50 / 50, the doffer speed is set to 50 m / min, and the cotton web is output to the conveying device 2, after the cotton web passes through the conveying area, it is collected into a composite sliver, wherein the speed of the conveying device 2 and the conveying device 4 is 51 m / min, and the speed of the collecting device 8 is 52 m / min; Step three: fill the array solution configured in the step S1 into the liquid supply device 6, turn on the high-voltage electrostatic generating device of the square wave pulse and set the voltage starting point to 0 V, the peak value to 70 kV, and the voltage transformation period to 0.5 Hz; wherein the pulse starting positions of the cationic blue / red / yellow / cyan color section sliver are 0 s / 0.5 s / 1 s / 1.5 s respectively, and the color nanometer array is generated to the mixed fiber web at a time length of 0.5 seconds each time; the vertical collection distance of the needleless electrostatic ionization nozzle 5 to the cotton web is 20 cm, the number of the needleless electrostatic ionization nozzle 5 is 6, the environmental temperature during the electrostatic ionization is 25 ℃, and the environmental relative humidity is 50 %RH; Step four: the cotton / nanometer array composite fiber sliver is collected, and four double-color section dyed slivers of blue / red / yellow / cyan are obtained at the collecting device 8, wherein the section dyeing period length L of the sliver is about 85 cm, and the cotton natural color section and the dyed section account for 3 / 4 and 1 / 4 respectively; Step five: 4 fiber slivers obtained in the step four are used to synthesize 1 slubbing, and the slubbing is combined for 2 passes; the first pass of the slubbing is started at the 0 s / 0.5 s / 1 s / 1.5 s section of blue / red / yellow / cyan respectively; after the first pass of the slubbing, the section dyeing basic period is blue / red / yellow / cyan, and the section dyeing period length L is about 340 cm; after the second pass of the slubbing, the section dyeing period length L is about 1360 cm, and the slubbing weight is 22.5 g / 5m; the section dyeing slubbing is sent into the roving and spinning process to obtain the yarn, and the specific process is as follows: the roving weight is 4 g / 10m, the twist is 4 T / m, and the speed is 200 rpm; the spun yarn fineness is 40, the twist is 500 T / m, and the speed is 10000 rpm.

[0039] In the embodiment, the basic section is composed of the blue / red / yellow / cyan section.

[0040] In the description of the present application, it should be understood that the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" and the like indicate the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and under the circumstances where no contrary description is made, these orientation words do not indicate and imply that the indicated device or element must have a specific orientation or be constructed and operated in a specific orientation, therefore it cannot be understood as a limitation on the protection scope of the present application; the orientation words "inner, outer" refer to the inner and outer relative to the contour of each component itself.

[0041] For purposes of the description hereinafter, spatial relative terms, such as "above", "below", "upper", "lower", and the like, can be used to describe the relative position of one element or feature to another as illustrated in the figures. It will be understood that the spatial relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "up" other elements or features would then be oriented "below" or "down" the other elements or features. Thus, the exemplary term "above" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0042] In addition, it should be noted that the use of "first", "second", and the like, terminology, merely to distinguish one component from another (e.g., without limitation, the first component, the second component), does not limit the scope of the present application, unless otherwise stated, and is not otherwise intended to refer to a particular order or sequence.

[0043] The above provides a kind of period voltage control composite yarn piece dyeing device and piece dyeing method, the principle and implementation mode of the present application are described in this paper by applying specific example, the above example is only used to help understand the method of the present application and its core idea;For those skilled in the art, according to the idea of the present application, there will be changes in specific implementation mode and application range, as described above, the content of the specification should not be understood as limiting the present application.

Claims

1. A composite yarn section dyeing device with periodic voltage control, characterized in that: The dyeing apparatus includes: Negative pressure suction screen (1) is used to support the fiber mesh (3) and drive it forward; Conveying device 1 (2) and conveying device 2 (4) are symmetrically arranged on the conveying path of the negative pressure suction screen (1) for synchronously conveying the fiber web (3). An electrostatic ionization module is arranged below the negative pressure suction screen (1). The electrostatic ionization module includes a needleless electrostatic ionization nozzle (5), a high-voltage electrostatic generator, and a liquid supply device (6). The liquid supply device (6) is connected to the needleless electrostatic ionization nozzle (5) and is used to transport the color array solution. The high-voltage electrostatic generator is electrically connected to the needleless electrostatic ionization nozzle (5) and is used to output a periodically changing voltage. A gathering device (8) is arranged downstream of the second conveying device (4) to gather the fiber web (3) embedded with colored nanoarrays into a segment-dyed colored inlaid fiber sliver (7).

2. The dyeing apparatus according to claim 1, characterized in that: The high-voltage electrostatic generator consists of a signal generator and a high-voltage generator. The signal generator uses a function generator to generate a low-frequency periodic signal which is connected to a high-voltage DC power supply, and the output voltage signal is a periodically changing voltage.

3. A segment dyeing method based on the segment dyeing apparatus as described in claim 1, characterized in that: Includes the following steps: Step 1: Mix the polymer, solvent, and dye in a certain proportion and stir continuously at room temperature until fully dissolved to obtain a color array solution; Step 2: The micron fiber raw material that has undergone the previous process is processed into a fiber web by a carding machine (3); Step 3: The fiber mesh (3) is conveyed forward under the support of the negative pressure suction screen (1) and passes through the first conveying device (2) and the second conveying device (4) in sequence; an electrostatic ionization module is arranged below the negative pressure suction screen (1), the electrostatic ionization module includes a needle-free electrostatic ionization nozzle (5), a high voltage electrostatic generator and a liquid supply device (6). Step 4: The colored array solution is supplied to the needleless electrostatic ionization nozzle (5), and the high voltage electrostatic generator is started to output a periodically changing voltage to control the colored nanoarray to ionize upward and periodically embed into the fiber web (3). After passing through the bundling device (8), the colored inlaid fiber sliver (7) is finally obtained. Step 5: Align the colored inlaid fiber slivers (7) according to different color segments, then spun, roving, and spinning to obtain colored variegated yarn.

4. The segment dyeing method according to claim 3, characterized in that: The polymer in step one is PAN or PVA, with a polymer mass fraction of 6-15%; when the polymer is PAN, the solvent is DMF, and when the polymer is PVA, the solvent is water, with a solvent mass fraction of 85-94%; the dye content is 2-10% of the array solution mass.

5. The segment dyeing method according to claim 3, characterized in that: The microfibers used in step two are one or more of cotton fiber, wool fiber, viscose fiber, and acrylic fiber, and the diameter of the microfibers is 10-30 μm.

6. The segment dyeing method according to claim 3, characterized in that: In step four, the dye in the colored nanoarray is one or more of reactive dyes, disperse dyes, acid dyes, direct dyes, and vat dyes, and the diameter of the colored nanoarray is 0-1000 nm.

7. The segment dyeing method according to claim 3, characterized in that: In step four, the range of the periodic voltage variation is 0-60 kV, the frequency is 0.1-3 Hz, and the waveform of the periodic voltage variation includes one or more of the following: spike pulse, sine wave, rectangular wave, bell wave, and trapezoidal wave.

8. The segment dyeing method according to claim 3, characterized in that: In step four, the number of needle-free electrostatic ionization nozzles (5) is 1-6, the receiving distance of the color nano array is 10-30cm, the electrostatic ionization environment temperature is 20-35℃, and the relative humidity is 20-80%RH.

9. The segment dyeing method according to claim 3, characterized in that: The frequency of the periodic voltage change in step four is f, the transmission speeds of the first (2) and the second (4) transmission devices are the same and both are V, and the segment dyeing length of the colored inlaid fiber sliver (7) is L, where L = V × f. -1 .

10. The segment dyeing method according to claim 3, characterized in that: The basic segment length of the colored inlaid fiber sliver (7) used in step five is L. y The basic segments include the natural fiber segment B and the dyed fiber segment R; for 3-n fibers, different colors R1-R2 are present. n Or different fragment lengths 1L y -nL y The basic repeating unit of segment coloring achieved by combining B+R color segments in a certain order includes: B+R n ,B+nR,nB+R,nB+nR,R1+R2···+R n nB+nR 1+ nB+nR2···nR n +nB and the permutations and combinations of repeating units above.

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