Yarn dyeing method and device and dyed yarn

Abstract

The invention discloses a yarn dyeing method and yarn dyeing equipment. The yarn dyeing method can be used for real-time dyeing of the primary color yarn in continuous conveying. The method comprises the following steps: carrying out direct injection dyeing on primary color yarns by utilizing macromolecular disperse dye, and sequentially carrying out post-treatment operation at least comprising heating fixation and plasma cleaning to obtain target dyed yarns, wherein the molecular weight of the macromolecular disperse dye exceeds 400; the fixation time of the heating fixation is not less than 12 seconds, and the cleaning time of the plasma cleaning is not more than 60 seconds. According to the method, the macromolecular disperse dye is used, the color fixation time is prolonged, and plasma cleaning is adopted, so that the color fastness of the dyed yarn is improved.

Description

Technical Field

[0001] This application relates to the field of industrial automation control and processing, and in particular to a continuous yarn dyeing method and yarn dyeing equipment. Background Technology

[0002] With the development of textile technology and users' high demands for colored fabrics and personalized needs, the requirements for the color of dyed yarns are also increasing. For example, a single dyed yarn may have different color segments and / or color variations, thus showcasing rich color variations to meet user needs. One current solution is to obtain dyed yarns with rich color variations by immediately dyeing white raw yarn. As technology advances, dyeing speeds are constantly improving, which also brings new requirements for post-dyeing drying, color fixing, and washing of the yarn. Summary of the Invention

[0003] To improve yarn dyeing effect and color fastness while achieving high-speed dyeing, this application discloses a yarn dyeing method, equipment, and dyed yarn. The method utilizes macromolecular disperse dyes for dyeing, and by increasing the heating and fixing time while employing plasma cleaning, it can enhance the yarn dyeing effect and achieve good color fastness.

[0004] The first aspect of this application provides a yarn dyeing method for real-time dyeing of continuously conveyed primary color yarn; the method includes: directly dyeing the primary color yarn with a macromolecular disperse dye, and then sequentially performing post-treatment operations including at least heating and fixing and plasma cleaning to obtain the target dyed yarn; wherein the molecular weight of the macromolecular disperse dye exceeds 400; the fixing time of the heating is not less than 12s, and the cleaning time of the plasma cleaning is not more than 60s.

[0005] According to some embodiments of this application, the color-fixing time is 30-60 seconds, and the color-fixing temperature is not less than 220°C.

[0006] According to some embodiments of this application, the plasma cleaning time is 30-60s, the cleaning power is 100W-300W, and the vacuum degree is 20-80Pa.

[0007] According to some embodiments of this application, the working gas used in the plasma cleaning includes oxygen or argon, with a flow rate of 10-50 sccm.

[0008] According to some embodiments of this application, the colors of the macromolecular disperse dye include at least cyan, magenta, yellow, and black, and the primary color yarn is white yarn.

[0009] According to some embodiments of this application, the dyeing speed of the primary color yarn is not less than 50 mm / s; or, the dyeing speed is not less than 200 mm / s.

[0010] A second aspect of this application provides a yarn dyeing apparatus for real-time dyeing of continuously conveyed primary color yarn, thereby achieving the yarn dyeing method described above. The yarn dyeing apparatus includes a dyeing component and a post-processing component arranged sequentially along the conveying direction of the primary color yarn. The dyeing component is configured to directly dye the primary color yarn using a macromolecular disperse dye. The post-processing component includes at least the color-fixing mechanism and a cleaning mechanism. The color-fixing mechanism is configured to heat and fix the dyed yarn continuously conveyed from the dyeing component. The cleaning mechanism is configured to perform plasma cleaning on the color-fixed yarn continuously conveyed from the color-fixing component. The macromolecular disperse dye has a molecular weight exceeding 400; the color-fixing time by heating is not less than 12 seconds, and the cleaning time by plasma cleaning is not more than 60 seconds.

[0011] According to some embodiments of this application, the color-fixing component includes a heating chamber, the cleaning component includes a vacuum cleaning chamber, and a bending thread feeding mechanism is provided in the heating chamber and / or the vacuum cleaning chamber for conveying yarn in a circumferential thread feeding manner within the heating chamber and / or the vacuum cleaning chamber.

[0012] According to some embodiments of this application, the yarn dyeing equipment is implemented based on coloreel ITCU.

[0013] A third aspect of this application provides dyed yarn, which is prepared based on the yarn dyeing method described above, or based on the yarn dyeing equipment described above.

[0014] The yarn dyeing method disclosed in this application uses macromolecular disperse dyes to directly dye the yarn, while providing a longer fixation time and plasma cleaning, which can improve the color fastness of the dyed yarn.

[0015] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0016] The disclosure of this application will become more readily understood with reference to the accompanying drawings. It will be readily understood by those skilled in the art that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this application. Furthermore, similar numbers in the drawings are used to denote similar components, wherein: Figure 1 This is an exemplary flowchart of a yarn dyeing method according to some embodiments of this application; Figure 2 This is an exemplary configuration diagram of a yarn dyeing apparatus according to some embodiments of this application. Detailed Implementation

[0017] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0018] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. The terminology used in this application and in its specification is for the purpose of describing particular embodiments only and is not intended to limit the application. The terms "first," "second," and similar terms used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships, which may change accordingly when the absolute position of the described object changes. The terms "and / or" or "and / or" as used in this application include any and all combinations of one or more of the associated listed items.

[0019] Currently, continuous yarn dyeing processes use low-temperature sublimation dyes. The small molecular structure of these dyes leads to poor colorfastness related to the dye's molecular structure, which is difficult to improve through process optimization. Simultaneously, to match the faster dyeing speeds (e.g., 50-100 mm / s, or even higher), the fixing time is short (e.g., less than 12 s), resulting in unsatisfactory dyeing effects. Furthermore, while ultrasonic cleaning is used, it requires a long time to achieve a good cleaning effect, which is not well-suited for high-speed dyeing. Therefore, this application provides a yarn dyeing method that uses macromolecular disperse dyes to enhance the binding force with the yarn and increase the difficulty of dye migration from within the yarn, thereby improving colorfastness. It also extends the fixing time and replaces ultrasonic cleaning with plasma cleaning, further improving various aspects of colorfastness.

[0020] The following description, with reference to the accompanying drawings, illustrates some preferred embodiments of the present application. It should be noted that the following description is for illustrative purposes only and is not intended to limit the scope of protection of the present application. The flowcharts used are for illustrating the operations performed by the system according to embodiments of the present application. It should be understood that the described operations are not necessarily performed precisely in sequence. Instead, various steps may be processed in reverse order or simultaneously. Furthermore, other operations may be added to these processes, or one or more steps may be removed from these processes.

[0021] Figure 1 This is an exemplary flowchart of a yarn dyeing method according to some embodiments of this application. The method can be used to dye and output continuously fed primary color yarn in real time. The dyeing speed is not less than 50 mm / s. In some embodiments, the dyeing speed can be not less than 200 mm / s. At such high dyeing speeds, the yarn dyeing method provided by this application can achieve high evenness and color fastness in the dyed yarn. Figure 1 As shown, process 100 may include the following operations.

[0022] Step S1: Direct-jet dyeing of the original color yarn using macromolecular disperse dyes.

[0023] In some embodiments, the macromolecular disperse dye may refer to a high-temperature sublimation direct-jet dye with a molecular weight greater than 400. The primary color yarn may include white primary color yarn. Primary color yarns such as polyester, nylon, and acrylic can be used as the primary color yarn. Alternatively, natural fibers can be used as primary color yarn by removing natural pigments from the fibers using a bleaching agent to achieve white yarn. This application does not specifically limit the material of the primary color yarn. In this application, using primary color yarn with high inherent luster for dyeing results in a more vibrant and bright target dyed yarn after the entire dyeing process, exhibiting a saturated and layered color.

[0024] In some embodiments, the macromolecular disperse dye can be a combination of one or more of black, cyan, magenta, and yellow macromolecular disperse inks. Exemplary black macromolecular disperse inks may include Disperse Black NP-ECT, Direct Black 168, etc. Exemplary cyan macromolecular disperse inks may include Disperse Brilliant Blue S-BG, Disperse Blue CR, Disperse Blue 148, etc. Exemplary magenta macromolecular disperse inks may include Disperse Red F-3BS, Disperse Red BS, Disperse Red GFL, etc. Exemplary yellow macromolecular disperse inks may include Disperse Yellow 6GL, Disperse Yellow 4G, Disperse Yellow 114, etc. Macromolecular inks have strong binding force to fibers, making it difficult for dye molecules located inside the yarn to migrate outwards, which is beneficial for improving the relevant color fastness of dyed yarns. Simultaneously, by combining different proportions of single-color disperse inks, multiple colors can be prepared, thereby enhancing color richness.

[0025] In some embodiments, direct-jet dyeing of the primary color yarn can be performed using a dyeing mechanism with a printhead / nozzle. For example, an exemplary structure may include a nozzle, an inkjet channel, and an ink reservoir. The macromolecular disperse dye can be stored in the ink reservoir and, during use, is ejected from the nozzle through the inkjet channel, adhering to and penetrating the primary color yarn, thereby completing the dyeing process. The nozzle can be selected according to the specific macromolecular disperse dye used to adapt to the dye's physicochemical properties.

[0026] S2: Perform post-treatment operations, including at least heat fixation and plasma cleaning, to obtain the target dyed yarn.

[0027] In some embodiments, the heat-fixing process can be used to promote dye diffusion and fixation with the fiber. Heating can cause dye molecules to diffuse from the fiber surface to the interior, thereby accelerating the penetration of dye molecules and evaporating moisture, causing unbound dye to detach from the fiber surface. In some embodiments, the heat-fixing time can be no less than 12 seconds. A longer heat-fixing time allows dye molecules to penetrate more fully into the fiber interior, thereby improving the dyeing effect. Optionally and preferably, the heat-fixing time can be 30-60 seconds, for example, 30 seconds, 35 seconds, 40 seconds, 45 seconds, 50 seconds, 55 seconds, 60 seconds, or any increment or decrease of the above values. The heating temperature for heat-fixing can be no less than 220°C. For example, the heating temperature can be a range including 220°C, such as 220°C±5°C, 220°C±4°C, 220°C±3°C, 220°C±2°C, 220°C±1°C, etc., which can be adjusted according to actual conditions, and this application does not impose specific limitations.

[0028] In some embodiments, the plasma cleaning is used to remove residues, grease, impurities, etc., generated during the heating process to prevent a decrease in color fastness. Furthermore, cleaning can remove auxiliaries and impurities adsorbed during dyeing and improve dyeing uniformity. In some embodiments, the plasma cleaning time may not exceed 60 seconds. Optionally or preferably, the plasma cleaning time can be 30-60 seconds, for example, 30s, 35s, 40s, 45s, 50s, 55s, 60s, or any increment or decrease of these values. Traditional ultrasonic cleaning requires up to 7 minutes to achieve a good cleaning effect. This significantly reduces production efficiency, especially in high-speed dyeing (e.g., dyeing speed greater than 50mm / s). This application utilizes plasma cleaning to replace traditional ultrasonic cleaning, ensuring cleaning effectiveness while meeting high-speed dyeing requirements, thereby improving yarn color fastness and increasing production efficiency.

[0029] The plasma cleaning power can range from 100W to 300W. Some exemplary, but not limiting, descriptions for polyester yarns suggest that the plasma cleaning power can be selected between 100W and 200W. If the polyester yarn is fine (e.g., for yarns in the 50D-75D range), the cleaning power can be initially set at 100W-150W, then gradually increased to achieve the best cleaning effect. If the polyester yarn is coarser (e.g., for rovings of 150D and above), the cleaning power can be between 150W and 300W, and can be adjusted in conjunction with the flow rate of the working gas to achieve the best cleaning effect. The working gas can include oxygen or argon. Of course, other suitable gases such as hydrogen, nitrogen, or combinations thereof can also be used. During the cleaning process, the gas flow rate can be between 10-50 sccm, for example, increments or decreases of any value above 10 sccm, 20 sccm, 30 sccm, 40 sccm, 50 sccm, etc. Based on the previous examples, for rovings of 150D and above, in addition to adjusting the cleaning power, the gas flow rate can also be adjusted to enhance the cleaning effect, such as by selecting a larger gas flow rate.

[0030] In some embodiments, the vacuum level of the plasma cleaning can be 20-80 Pa. Exemplarily, it can be adjusted within this range according to the fineness of the primary yarn. For example, for fine yarns below 50D, the vacuum level can be 20-30 Pa. For medium-coarse yarns of 50D-150D, the vacuum level can be 30-50 Pa. And for roving yarns of 150D and above, the vacuum level can be 50-80 Pa. Of course, the above examples are not limiting; for example, a lower vacuum level, such as 40 Pa, can be selected for roving yarns.

[0031] This application utilizes the high-energy particle bombardment and chemical reaction of plasma cleaning to more thoroughly remove residual dyes and impurities from the yarn surface in a shorter time, improving the cleaning effect without damaging the fiber structure.

[0032] The yarn dyeing method provided in this application uses macromolecular disperse dyes to directly dye the yarn, while providing a longer fixation time compared to existing technologies, and replaces ultrasonic cleaning with plasma cleaning, which can improve the color fastness of the dyed yarn.

[0033] It should be noted that the above-mentioned Figure 1 The descriptions of the various steps in this application are merely for illustrative purposes and do not limit the scope of this application. Those skilled in the art can learn from the guidance of this application. Figure 1 Various modifications and changes have been made to the various steps in the process. However, these modifications and changes are still within the scope of this application.

[0034] This application also provides a yarn dyeing apparatus for implementing the above-described yarn dyeing method. (Reference) Figure 2 , Figure 2 These are exemplary configuration diagrams of a yarn dyeing apparatus according to some embodiments of this application, such as... Figure 2 As shown, the yarn dyeing equipment may include yarn dyeing along the primary color (in...) Figure 2 The direction of yarn transport (e.g., L) Figure 2 The dyeing assembly 100 and the post-treatment assembly 200 are arranged sequentially (indicated by the direction of the middle arrow). The yarn L is continuously conveyed and, after being dyed by the dyeing assembly 100, is fed into the post-treatment assembly 200 to at least complete color fixing and cleaning.

[0035] The dyeing assembly 100 can directly dye the yarn L using macromolecular disperse dyes. The nozzle 110 can be a ring-shaped nozzle to dye the yarn L in all directions and prevent uneven dyeing.

[0036] The post-processing assembly 200 may include a color-fixing mechanism 210 and a cleaning mechanism 220. The color-fixing mechanism 210 and the cleaning mechanism 220 may be arranged sequentially. The dyed yarn L is first fed into the color-fixing mechanism 210 for heat fixation, and then fed into the cleaning mechanism 220 for cleaning.

[0037] The color-fixing mechanism 210 can be any heating structure that provides a heating function, such as a steam heating structure, a hot air circulation heating structure, an electromagnetic induction heating structure, an infrared heating structure, a microwave heating structure, etc. In some implementations, the color-fixing mechanism 210 may have a heating cavity, within which a bending and feeding mechanism may be installed. For example... Figure 2As shown, the guide roller can be used to change the feeding direction of yarn L within the heating chamber, thereby achieving a circumferential feeding method for yarn L within the heating chamber. This extends the feeding time of yarn L within the heating chamber, better adapting to the heating and color-fixing time. The volume of the heating chamber can also be increased. For example, for a cubic heating chamber, one or more of the length, width, and height parameters can be increased. A larger heating chamber directly increases the feeding time of yarn L within it and allows for an increase in the feeding distance of the aforementioned circumferential feeding method, further increasing the feeding time and thus meeting the required heating and color-fixing time.

[0038] The cleaning mechanism 220 can be a plasma cleaning mechanism. Similarly, the vacuum cleaning chamber of the cleaning mechanism 220 can also be equipped with a bending and feeding mechanism, which can be the same as the bending and feeding mechanism in the color-fixing mechanism 210, for example, using a reciprocating motion achieved by a guide roller. In this way, the color-fixed yarn L will also be transported in a circular feeding manner within the vacuum cleaning chamber, similarly increasing the transport time of the yarn L within the vacuum cleaning chamber. Furthermore, the vacuum cleaning chamber can also be enlarged by increasing its volume to further increase the transport time of the yarn L, thereby meeting the required plasma cleaning time.

[0039] In some implementations, the post-processing component 200 may also include a lubrication mechanism. Figure 2 (Not shown in the image). The lubrication mechanism can be arranged behind the cleaning mechanism 220 along the yarn conveying direction to lubricate the cleaned yarn L. For example, it can be an electrostatic spraying lubrication structure, which atomizes the lubricant through an electrostatic nozzle and sprays it onto the yarn L. After lubrication, the final target dyed yarn will be obtained.

[0040] In some implementations, the aforementioned yarn dyeing equipment can be based on the Coloreel ITCU. For example, the post-processing component 200 can be connected to the Coloreel ITCU. This allows for high-speed, real-time dyeing of yarns with rich colors while ensuring yarn quality.

[0041] The yarn dyeing equipment provided in this application can dye yarn by using macromolecular disperse dyes and extend the heating and fixing time. Combined with plasma cleaning, it can obtain dyed yarn with better color fastness.

[0042] The present application will be further described in detail below with reference to embodiments. It should be noted that the following embodiments are for illustrative purposes only and are not intended to limit the scope of protection claimed in this application.

[0043] Example 1 - Colorfastness Test 1 A. Comparative Design Experimental Group 1: Polyester yarn was used, and the dye was a macromolecular disperse dye: Disperse Brilliant Blue S-BG; the fixing time was 20s, and ultrasonic cleaning was used.

[0044] The dyeing process is as follows: After direct-jet dyeing of the continuously conveyed yarn, it is fed into a heating and fixing device for color fixing. After completion, it undergoes ultrasonic cleaning and lubrication treatment to obtain the final dyed yarn.

[0045] Experimental Group 2: The difference between Experimental Group 2 and Experimental Group 1 is that the dye used is the macromolecular disperse dye Disperse Red F-3BS.

[0046] Experimental Group 3: The difference between Experimental Group 3 and Experimental Group 1 is that the dye used is the macromolecular disperse dye Disperse Yellow 6GL.

[0047] Experimental Group 4: The difference between Experimental Group 4 and Experimental Group 1 is that the dye used is the macromolecular disperse dye Disperse Black NP-ECT.

[0048] Control Group 1: The difference between Control Group 1 and Experimental Group 1 is that Control Group 1 uses Disperse Blue CE, a small molecule thermal transfer dye ink.

[0049] Control Group 2: The difference between Control Group 2 and Experimental Group 2 is that Control Group 2 uses Disperse Red FB, a small molecule thermal transfer dye ink.

[0050] Control group 3: The difference between control group 3 and experimental group 3 is that control group 3 uses small molecule thermal transfer dye ink disperse yellow RGFL.

[0051] Control group 4: The difference between control group 4 and experimental group 4 is that control group 4 uses small molecule thermal transfer dye ink disperse black ECO.

[0052] The relevant parameters for each group are shown in Table 1 below.

[0053] Table 1. Relevant parameters for Example 1 B. Colorfastness testing process: I. Test Procedure for Abrasion Resistance 1. Prepare materials Dry / wet white standard cotton fabric (5cm×5cm); color fastness to rubbing tester; gray grading card (grades 1-5).

[0054] 2. Operating Procedures Fix the sample on the testing instrument platform; rub it back and forth 10 times with a dry cloth under a pressure of 10N (linear stroke of 10cm); the wet cloth needs to be soaked in grade III water and squeezed to 100% moisture content, and repeat the same operation; compare the degree of staining of the white cloth with the gray card rating (grade 5 is the best).

[0055] II. Wash fastness test procedure 1. Equipment and reagents Standard detergent (5g / L); constant temperature water bath (60±2℃); standard lining fabric (sewn to the sample).

[0056] 2. Testing Process After the sample is sewn to the lining fabric, it is placed in the washing solution; treated in a 60℃ water bath for 30 minutes (simulating household washing); removed and air-dried naturally, and the staining grade of the lining fabric is assessed using a staining grey card.

[0057] III. Heat Resistance and Compression Fastness Test Procedure 1. Three testing modes: Dry pressing: The dry sample is directly ironed at 180°C for 15 seconds (pressure 5kPa); Moisture pressure: After covering with a damp cotton lining, iron at 150°C for 10 seconds; Wet pressing: After the sample is wetted, it is covered with dry lining and ironed at 160°C for 12 seconds.

[0058] 2. Rating Criteria Immediately after cooling, compare with a color-changing gray scale (Level 1: severe discoloration, Level 5: no change); for damp / wet pressing, the staining level of the lining fabric needs to be assessed separately.

[0059] IV. Color migration fastness test procedure 1. Simulated migration conditions Place the sample tightly over a white fabric. Apply pressure (2 kPa) and temperature (80°C) for 1 hour.

[0060] 2. Evaluation Methods Observe the staining of white fabrics; use a staining gray scale for rating; and combine this with spectrophotometric measurement of the color difference ΔE value.

[0061] The specific test results are shown in Table 2.

[0062] Table 2 Colorfastness Test Results 1 As shown in Table 2, using macromolecular disperse dyes can achieve better color fastness compared to small molecule heat transfer dye inks.

[0063] Example 2 - Colorfastness Test 2 A. Comparative Design Experimental Group 1: Polyester yarn was used, and the dye was a small molecule heat transfer dye ink: Disperse Blue CE. The fixing time was 6 seconds.

[0064] The dyeing process is as follows: After direct-jet dyeing of the continuously conveyed yarn, it is fed into a heating and fixing device for fixing for 6 seconds. Following ultrasonic cleaning and lubrication treatment, the final dyed yarn is obtained.

[0065] Experimental Group 2: The difference between Experimental Group 2 and Experimental Group 1 is that the color fixation time is 8s.

[0066] Experimental Group 3: The difference between Experimental Group 3 and Experimental Group 1 is that the color fixing time is 10s.

[0067] Experimental group 4: The difference between experimental group 4 and experimental group 1 is that the color fixing time is 12s.

[0068] Experimental group 5: The difference between experimental group 5 and experimental group 1 is that the color fixing time is 30s.

[0069] Experimental Group 6: The difference between Experimental Group 6 and Experimental Group 1 is that the color fixing time is 40s.

[0070] Experimental Group 7: The difference between Experimental Group 7 and Experimental Group 1 is that the color fixing time is 50s.

[0071] Experimental Group 8: The difference between Experimental Group 8 and Experimental Group 1 is that the color fixing time is 60s.

[0072] The relevant parameters for each group are shown in Table 3 below.

[0073] Table 3 Relevant parameters of Example 2 B. Colorfastness testing process: I. Test Procedure for Abrasion Resistance 1. Prepare materials Dry / wet white standard cotton fabric (5cm×5cm); color fastness to rubbing tester; gray grading card (grades 1-5).

[0074] 2. Operating Procedures Fix the sample on the testing instrument platform; rub it back and forth 10 times with a dry cloth under a pressure of 10N (linear stroke of 10cm); the wet cloth needs to be soaked in grade III water and squeezed to 100% moisture content, and repeat the same operation; compare the degree of staining of the white cloth with the gray card rating (grade 5 is the best).

[0075] II. Wash fastness test procedure 1. Equipment and reagents Standard detergent (5g / L); constant temperature water bath (60±2℃); standard lining fabric (sewn to the sample).

[0076] 2. Testing Process After the sample is sewn to the lining fabric, it is placed in the washing solution; treated in a 60℃ water bath for 30 minutes (simulating household washing); removed and air-dried naturally, and the staining grade of the lining fabric is assessed using a staining grey card.

[0077] III. Heat Resistance and Compression Fastness Test Procedure 1. Three testing modes: Dry pressing: The dry sample is directly ironed at 180°C for 15 seconds (pressure 5kPa); Moisture pressure: After covering with a damp cotton lining, iron at 150°C for 10 seconds; Wet pressing: After the sample is wetted, it is covered with dry lining and ironed at 160°C for 12 seconds.

[0078] 2. Rating Criteria Immediately after cooling, compare with a color-changing gray scale (Level 1: severe discoloration, Level 5: no change); for damp / wet pressing, the staining level of the lining fabric needs to be assessed separately.

[0079] IV. Color migration fastness test procedure 1. Simulated migration conditions Place the sample tightly over a white fabric. Apply pressure (2 kPa) and temperature (80°C) for 1 hour.

[0080] 2. Evaluation Methods Observe the staining of white fabrics; use a staining gray scale for rating; and combine this with spectrophotometric measurement of the color difference ΔE value.

[0081] The specific test results are shown in Table 4.

[0082] Table 4 Colorfastness Test Results 2 As shown in Table 4, by increasing the fixing time, even when using small molecule heat transfer dye ink, the color fastness of the yarn will increase with the increase of fixing time.

[0083] Example 3 - Colorfastness Test 3 A. Comparative Design Experimental Group 1: Polyester yarn was used, and the dye was a small molecule heat transfer dye ink: Disperse Blue CE. Plasma cleaning was employed, with a cleaning time of 30 seconds.

[0084] The dyeing process is as follows: After direct-jet dyeing of the continuously conveyed yarn, it is fed into a heating and fixing device for color fixing for 12 seconds. Following plasma cleaning and lubrication treatment, the final dyed yarn is obtained.

[0085] Experimental Group 2: The difference between Experimental Group 2 and Experimental Group 1 is that the plasma cleaning time is 60s.

[0086] Experimental Group 3: The difference between Experimental Group 3 and Experimental Group 1 is that the plasma cleaning time is 40 seconds.

[0087] Control group 1: The difference between control group 1 and experimental group 1 is that ultrasonic cleaning was used and the cleaning time was 60 seconds.

[0088] Control group 2: The difference between control group 2 and experimental group 1 is that ultrasonic cleaning was used and the cleaning time was 70 seconds.

[0089] Control group 3: The difference between control group 3 and experimental group 1 is that ultrasonic cleaning was used and the cleaning time was 80 seconds.

[0090] The relevant parameters for each group are shown in Table 5 below.

[0091] Table 5 Relevant parameters of Example 3 B. Colorfastness testing process: I. Test Procedure for Abrasion Resistance 1. Prepare materials Dry / wet white standard cotton fabric (5cm×5cm); color fastness to rubbing tester; gray grading card (grades 1-5).

[0092] 2. Operating Procedures Fix the sample on the testing instrument platform; rub it back and forth 10 times with a dry cloth under a pressure of 10N (linear stroke of 10cm); the wet cloth needs to be soaked in grade III water and squeezed to 100% moisture content, and repeat the same operation; compare the degree of staining of the white cloth with the gray card rating (grade 5 is the best).

[0093] II. Wash fastness test procedure 1. Equipment and reagents Standard detergent (5g / L); constant temperature water bath (60±2℃); standard lining fabric (sewn to the sample).

[0094] 2. Testing Process After the sample is sewn to the lining fabric, it is placed in the washing solution; treated in a 60℃ water bath for 30 minutes (simulating household washing); removed and air-dried naturally, and the staining grade of the lining fabric is assessed using a staining grey card.

[0095] III. Heat Resistance and Compression Fastness Test Procedure 1. Three testing modes: Dry pressing: The dry sample is directly ironed at 180°C for 15 seconds (pressure 5kPa); Moisture pressure: After covering with a damp cotton lining, iron at 150°C for 10 seconds; Wet pressing: After the sample is wetted, it is covered with dry lining and ironed at 160°C for 12 seconds.

[0096] 2. Rating Criteria Immediately after cooling, compare with a color-changing gray scale (Level 1: severe discoloration, Level 5: no change); for damp / wet pressing, the staining level of the lining fabric needs to be assessed separately.

[0097] IV. Color migration fastness test procedure 1. Simulated migration conditions Place the sample tightly over a white fabric. Apply pressure (2 kPa) and temperature (80°C) for 1 hour.

[0098] 2. Evaluation Methods Observe the staining of white fabrics; use a staining gray scale for rating; and combine this with spectrophotometric measurement of the color difference ΔE value.

[0099] The specific test results are shown in Table 6.

[0100] Table 6 Colorfastness Test Results 3 As shown in Table 6, compared with ultrasonic cleaning, even when using small molecule heat transfer dye ink, the yarn cleaned by plasma will be improved.

[0101] Example 4 - Colorfastness Test 4 A. Comparative Design Experimental Group 1: Polyester yarn was used, and the dye was a macromolecular disperse dye: Disperse Yellow 6GL; the fixing time was 30s.

[0102] The dyeing process is as follows: After direct-jet dyeing of the continuously conveyed yarn, it is fed into a heating and fixing device for 30 seconds. Following ultrasonic cleaning and lubrication treatment, the final dyed yarn is obtained.

[0103] Experimental Group 2: The difference between Experimental Group 2 and Experimental Group 1 is that the color fixing time is 40s.

[0104] Experimental Group 3: The difference between Experimental Group 3 and Experimental Group 1 is that the color fixing time is 50s.

[0105] Experimental Group 4: The difference between Experimental Group 4 and Experimental Group 1 is that the color fixing time is 60s.

[0106] Experimental Group 5: The difference between Experimental Group 5 and Experimental Group 1 is that the macromolecular disperse dye Disperse Red F-3BS is used.

[0107] Experimental Group 6: The difference between Experimental Group 6 and Experimental Group 5 is that the color fixing time is 40s.

[0108] Experimental Group 7: The difference between Experimental Group 7 and Experimental Group 5 is that the color fixing time is 50s.

[0109] Experimental Group 8: The difference between Experimental Group 8 and Experimental Group 5 is that the color fixing time is 60s.

[0110] Experimental Group 9: The difference between Experimental Group 9 and Experimental Group 1 is that Brilliant Blue S-BG is dispersed using a macromolecular disperse dye.

[0111] Experimental group 10: The difference between experimental group 10 and experimental group 9 is that the color fixing time is 40s.

[0112] Experimental group 11: The difference between experimental group 11 and experimental group 9 is that the color fixing time is 50s.

[0113] Experimental group 12: The difference between experimental group 12 and experimental group 9 is that the color fixing time is 60s.

[0114] Control Group 1: The difference between Control Group 1 and Experimental Group 1 is that Control Group 1 uses a small molecule thermal transfer dye ink: Disperse Blue CE, with a fixing time of 6 seconds.

[0115] Comparison Group 2: The difference between Comparison Group 2 and Comparison Group 1 is that the color fixing time is 8 seconds.

[0116] Comparison Group 3: The difference between Comparison Group 3 and Comparison Group 1 is that the color fixing time is 10 seconds.

[0117] Comparison Group 4: The difference between Comparison Group 4 and Comparison Group 1 is that the color fixing time is 12s.

[0118] The relevant parameters for each group are shown in Table 7 below.

[0119] Table 7 Relevant parameters of Example 4 B. Colorfastness testing process: I. Test Procedure for Abrasion Resistance 1. Prepare materials Dry / wet white standard cotton fabric (5cm×5cm); color fastness to rubbing tester; gray grading card (grades 1-5).

[0120] 2. Operating Procedures Fix the sample on the testing instrument platform; rub it back and forth 10 times with a dry cloth under a pressure of 10N (linear stroke of 10cm); the wet cloth needs to be soaked in grade III water and squeezed to 100% moisture content, and repeat the same operation; compare the degree of staining of the white cloth with the gray card rating (grade 5 is the best).

[0121] II. Wash fastness test procedure 1. Equipment and reagents Standard detergent (5g / L); constant temperature water bath (60±2℃); standard lining fabric (sewn to the sample).

[0122] 2. Testing Process After the sample is sewn to the lining fabric, it is placed in the washing solution; treated in a 60℃ water bath for 30 minutes (simulating household washing); removed and air-dried naturally, and the staining grade of the lining fabric is assessed using a staining grey card.

[0123] III. Heat Resistance and Compression Fastness Test Procedure 1. Three testing modes: Dry pressing: The dry sample is directly ironed at 180°C for 15 seconds (pressure 5kPa); Moisture pressure: After covering with a damp cotton lining, iron at 150°C for 10 seconds; Wet pressing: After the sample is wetted, it is covered with dry lining and ironed at 160°C for 12 seconds.

[0124] 2. Rating Criteria Immediately after cooling, compare with a color-changing gray scale (Level 1: severe discoloration, Level 5: no change); for damp / wet pressing, the staining level of the lining fabric needs to be assessed separately.

[0125] IV. Color migration fastness test procedure 1. Simulated migration conditions Place the sample tightly over a white fabric. Apply pressure (2 kPa) and temperature (80°C) for 1 hour.

[0126] 2. Evaluation Methods Observe the staining of white fabrics; use a staining gray scale for rating; and combine this with spectrophotometric measurement of the color difference ΔE value.

[0127] The specific test results are shown in Table 8.

[0128] Table 8 Colorfastness Test Results 4 As shown in Table 8, using macromolecular disperse dyes combined with a long fixing time can effectively improve the color fastness of yarn compared to small molecule heat transfer inks and short fixing time, under the same ultrasonic cleaning method.

[0129] Example 5 - Colorfastness Test 5 A. Comparative Design Experimental Group 1: Polyester yarn was used, and the dye was a macromolecular disperse dye: Disperse Yellow 6GL; and plasma cleaning was employed.

[0130] The dyeing process is as follows: After direct-jet dyeing of the continuously conveyed yarn, it is transferred to a heating and fixing device for fixing for 20 seconds. Following plasma cleaning and lubrication treatment, the final dyed yarn is obtained.

[0131] Experimental Group 2: The difference between Experimental Group 2 and Experimental Group 1 is that the macromolecular disperse dye Disperse Red F-3BS was used.

[0132] Experimental Group 3: The difference between Experimental Group 3 and Experimental Group 1 is that Brilliant Blue S-BG is dispersed using a macromolecular disperse dye.

[0133] Control Group 1: The difference between Control Group 1 and Experimental Group 1 is that Control Group 1 uses a small molecule thermal transfer dye ink: Disperse Yellow RGFL (yellow) and is cleaned with ultrasonic waves.

[0134] Comparison Group 2: The difference between Comparison Group 2 and Comparison Group 1 is that it uses a small molecule thermal transfer dye ink: Disperse Red FB (Red) and employs ultrasonic cleaning.

[0135] Comparison Group 3: The difference between Comparison Group 3 and Comparison Group 1 is that it uses a small molecule thermal transfer dye ink: Disperse Blue CE (blue) and employs ultrasonic cleaning.

[0136] The relevant parameters for each group are shown in Table 9 below.

[0137] Table 9 Relevant parameters of Example 5 B. Colorfastness testing process: I. Test Procedure for Abrasion Resistance 1. Prepare materials Dry / wet white standard cotton fabric (5cm×5cm); color fastness to rubbing tester; gray grading card (grades 1-5).

[0138] 2. Operating Procedures Fix the sample on the testing instrument platform; rub it back and forth 10 times with a dry cloth under a pressure of 10N (linear stroke of 10cm); the wet cloth needs to be soaked in grade III water and squeezed to 100% moisture content, and repeat the same operation; compare the degree of staining of the white cloth with the gray card rating (grade 5 is the best).

[0139] II. Wash fastness test procedure 1. Equipment and reagents Standard detergent (5g / L); constant temperature water bath (60±2℃); standard lining fabric (sewn to the sample).

[0140] 2. Testing Process After the sample is sewn to the lining fabric, it is placed in the washing solution; treated in a 60℃ water bath for 30 minutes (simulating household washing); removed and air-dried naturally, and the staining grade of the lining fabric is assessed using a staining grey card.

[0141] III. Heat Resistance and Compression Fastness Test Procedure 1. Three testing modes: Dry pressing: The dry sample is directly ironed at 180°C for 15 seconds (pressure 5kPa); Moisture pressure: After covering with a damp cotton lining, iron at 150°C for 10 seconds; Wet pressing: After the sample is wetted, it is covered with dry lining and ironed at 160°C for 12 seconds.

[0142] 2. Rating Criteria Immediately after cooling, compare with a color-changing gray scale (Level 1: severe discoloration, Level 5: no change); for damp / wet pressing, the staining level of the lining fabric needs to be assessed separately.

[0143] IV. Color migration fastness test procedure 1. Simulated migration conditions Place the sample tightly over a white fabric. Apply pressure (2 kPa) and temperature (80°C) for 1 hour.

[0144] 2. Evaluation Methods Observe the staining of white fabrics; use a staining gray scale for rating; and combine this with spectrophotometric measurement of the color difference ΔE value.

[0145] The specific test results are shown in Table 10.

[0146] Table 10 Colorfastness Test Results 5 As shown in Table 10, using macromolecular disperse dyes combined with plasma cleaning, compared to the combination of small molecule heat transfer inks and ultrasonic cleaning, can effectively improve the color fastness of yarn under the same fixing time.

[0147] Example 6 - Colorfastness Test 6 A. Comparative Design Experimental Group 1: Polyester yarn was used, the dye was a small molecule heat transfer dye ink: Disperse Blue CE, the fixing time was 30s, and plasma cleaning was used.

[0148] The dyeing process is as follows: After direct-jet dyeing of the continuously conveyed yarn, it is transferred to a heating and fixing device for fixing for 30 seconds. Following plasma cleaning and lubrication treatment, the final dyed yarn is obtained.

[0149] Experimental Group 2: The difference between Experimental Group 2 and Experimental Group 1 is that the color fixing time is 40s.

[0150] Experimental Group 3: The difference between Experimental Group 3 and Experimental Group 1 is that the color fixing time is 50s.

[0151] Experimental Group 4: The difference between Experimental Group 4 and Experimental Group 1 is that the color fixing time is 60s.

[0152] Control group 1: The difference between control group 1 and experimental group 1 is that the color fixing time is 6 seconds and ultrasonic cleaning is used.

[0153] Control group 2: The difference between control group 2 and control group 1 is that the color fixation time is 8 seconds.

[0154] Control group 3: The difference between control group 3 and control group 1 is that the color fixing time is 10s.

[0155] Control group 4: The difference between control group 3 and control group 1 is that the color fixing time is 12s.

[0156] The relevant parameters for each group are shown in Table 11 below.

[0157] Table 11 Relevant parameters of Example 6 B. Colorfastness testing process: I. Test Procedure for Abrasion Resistance 1. Prepare materials Dry / wet white standard cotton fabric (5cm×5cm); color fastness to rubbing tester; gray grading card (grades 1-5).

[0158] 2. Operating Procedures Fix the sample on the testing instrument platform; rub it back and forth 10 times with a dry cloth under a pressure of 10N (linear stroke of 10cm); the wet cloth needs to be soaked in grade III water and squeezed to 100% moisture content, and repeat the same operation; compare the degree of staining of the white cloth with the gray card rating (grade 5 is the best).

[0159] II. Wash fastness test procedure 1. Equipment and reagents Standard detergent (5g / L); constant temperature water bath (60±2℃); standard lining fabric (sewn to the sample).

[0160] 2. Testing Process After the sample is sewn to the lining fabric, it is placed in the washing solution; treated in a 60℃ water bath for 30 minutes (simulating household washing); removed and air-dried naturally, and the staining grade of the lining fabric is assessed using a staining grey card.

[0161] III. Heat Resistance and Compression Fastness Test Procedure 1. Three testing modes: Dry pressing: The dry sample is directly ironed at 180°C for 15 seconds (pressure 5kPa); Moisture pressure: After covering with a damp cotton lining, iron at 150°C for 10 seconds; Wet pressing: After the sample is wetted, it is covered with dry lining and ironed at 160°C for 12 seconds.

[0162] 2. Rating Criteria Immediately after cooling, compare with a color-changing gray scale (Level 1: severe discoloration, Level 5: no change); for damp / wet pressing, the staining level of the lining fabric needs to be assessed separately.

[0163] IV. Color migration fastness test procedure 1. Simulated migration conditions Place the sample tightly over a white fabric. Apply pressure (2 kPa) and temperature (80°C) for 1 hour.

[0164] 2. Evaluation Methods Observe the staining of white fabrics; use a staining gray scale for rating; and combine this with spectrophotometric measurement of the color difference ΔE value.

[0165] The specific test results are shown in Table 12.

[0166] Table 12 Colorfastness Test Results 6 As shown in Table 10, when using small molecule thermal transfer dye ink to dye yarn, plasma cleaning combined with a long fixing time can effectively improve the color fastness of the yarn compared to ultrasonic cleaning combined with a short fixing time.

[0167] Example 7 - Colorfastness Test 7 A. Comparative Design Experimental Group 1: Polyester yarn was used, and the dye was a macromolecular disperse dye: Disperse Yellow 6GL; the fixing time was 30s, and plasma cleaning was used.

[0168] The dyeing process is as follows: After direct-jet dyeing of the continuously conveyed yarn, it is transferred to a heating and fixing device for fixing for 30 seconds. Following plasma cleaning and lubrication treatment, the final dyed yarn is obtained.

[0169] Experimental Group 2: The difference between Experimental Group 2 and Experimental Group 1 is that the color fixing time is 40s.

[0170] Experimental Group 3: The difference between Experimental Group 3 and Experimental Group 1 is that the color fixing time is 50s.

[0171] Experimental Group 4: The difference between Experimental Group 4 and Experimental Group 1 is that the color fixing time is 60s.

[0172] Experimental Group 5: The difference between Experimental Group 5 and Experimental Group 1 is that the macromolecular disperse dye Disperse Red F-3BS is used.

[0173] Experimental Group 6: The difference between Experimental Group 6 and Experimental Group 5 is that the color fixing time is 40s.

[0174] Experimental Group 7: The difference between Experimental Group 7 and Experimental Group 5 is that the color fixing time is 50s.

[0175] Experimental Group 8: The difference between Experimental Group 8 and Experimental Group 5 is that the color fixing time is 60s.

[0176] Experimental Group 9: The difference between Experimental Group 9 and Experimental Group 1 is that Brilliant Blue S-BG is dispersed using a macromolecular disperse dye.

[0177] Experimental group 10: The difference between experimental group 10 and experimental group 9 is that the color fixing time is 40s.

[0178] Experimental group 11: The difference between experimental group 11 and experimental group 9 is that the color fixing time is 50s.

[0179] Experimental group 12: The difference between experimental group 12 and experimental group 9 is that the color fixing time is 60s.

[0180] Control Group 1: The difference between Control Group 1 and Experimental Group 1 is that Control Group 1 uses small molecule thermal transfer dye ink: Disperse Blue CE, the color fixation time is 6s, and ultrasonic cleaning is used.

[0181] Comparison Group 2: The difference between Comparison Group 2 and Comparison Group 1 is that the color fixing time is 8 seconds.

[0182] Comparison Group 3: The difference between Comparison Group 3 and Comparison Group 1 is that the color fixing time is 10 seconds.

[0183] Comparison Group 4: The difference between Comparison Group 4 and Comparison Group 1 is that the color fixing time is 12s.

[0184] The relevant parameters for each group are shown in Table 13 below.

[0185] B. Colorfastness testing process: I. Test Procedure for Abrasion Resistance 1. Prepare materials Dry / wet white standard cotton fabric (5cm×5cm); color fastness to rubbing tester; gray grading card (grades 1-5).

[0186] 2. Operating Procedures Fix the sample on the testing instrument platform; rub it back and forth 10 times with a dry cloth under a pressure of 10N (linear stroke of 10cm); the wet cloth needs to be soaked in grade III water and squeezed to 100% moisture content, and repeat the same operation; compare the degree of staining of the white cloth with the gray card rating (grade 5 is the best).

[0187] II. Wash fastness test procedure 1. Equipment and reagents Standard detergent (5g / L); constant temperature water bath (60±2℃); standard lining fabric (sewn to the sample).

[0188] 2. Testing Process After the sample is sewn to the lining fabric, it is placed in the washing solution; treated in a 60℃ water bath for 30 minutes (simulating household washing); removed and air-dried naturally, and the staining grade of the lining fabric is assessed using a staining grey card.

[0189] III. Heat Resistance and Compression Fastness Test Procedure 1. Three testing modes: Dry pressing: The dry sample is directly ironed at 180°C for 15 seconds (pressure 5kPa); Moisture pressure: After covering with a damp cotton lining, iron at 150°C for 10 seconds; Wet pressing: After the sample is wetted, it is covered with dry lining and ironed at 160°C for 12 seconds.

[0190] 2. Rating Criteria Immediately after cooling, compare with a color-changing gray scale (Level 1: severe discoloration, Level 5: no change); for damp / wet pressing, the staining level of the lining fabric needs to be assessed separately.

[0191] IV. Color migration fastness test procedure 1. Simulated migration conditions Place the sample tightly over a white fabric. Apply pressure (2 kPa) and temperature (80°C) for 1 hour.

[0192] 2. Evaluation Methods Observe the staining of white fabrics; use a staining gray scale for rating; and combine this with spectrophotometric measurement of the color difference ΔE value.

[0193] The specific test results are shown in Table 14.

[0194] Table 14 Colorfastness Test Results 7 As shown in Table 14, using macromolecular disperse dyes, combined with long fixation time and plasma cleaning, can significantly improve the color fastness of yarn compared to traditional small molecule transfer inks and post-treatment methods that combine ultrasonic cleaning with short fixation time.

[0195] The yarn dyeing method provided in this application improves the color fastness of yarn by using macromolecular disperse dyes. Furthermore, by optimizing the fixing time and employing plasma cleaning, the various fastness properties of the dyed yarn are significantly improved.

[0196] This application also provides a dyed yarn, which can be obtained based on the aforementioned yarn dyeing method or yarn dyeing equipment.

[0197] This application has described the basic concepts. Obviously, for those skilled in the art, the above detailed disclosure is merely illustrative and does not constitute a limitation of this application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and corrections to this application. Such modifications, improvements, and corrections are suggested in this application, and therefore such modifications, improvements, and corrections still fall within the spirit and scope of the exemplary embodiments of this application.

[0198] Furthermore, this application uses specific terms to describe its embodiments. For example, "an embodiment," "one embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic related to at least one embodiment of this application. Therefore, it should be emphasized and noted that "an embodiment," "one embodiment," or "an alternative embodiment" mentioned twice or more in different locations in this application do not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of this application can be appropriately combined.

[0199] Furthermore, unless expressly stated in the claims, the order of processing elements and sequences, the use of numbers and letters, or other names described in this application are not intended to limit the order of the processes and methods of this application. Although the foregoing disclosure has discussed some currently considered useful embodiments of the invention through various examples, it should be understood that such details are for illustrative purposes only, and the appended claims are not limited to the disclosed embodiments; rather, the claims are intended to cover all modifications and equivalent combinations that conform to the substance and scope of the embodiments of this application. For example, while the system components described above can be implemented using hardware devices, they can also be implemented solely through software solutions, such as installing the described system on existing servers or mobile devices.

[0200] Similarly, it should be noted that, in order to simplify the description of the present application and thus aid in the understanding of one or more embodiments of the invention, the foregoing description of the embodiments of the present application sometimes combines multiple features into a single embodiment, drawing, or description thereof. However, this disclosure method does not imply that the subject matter of the application requires more features than those mentioned in the claims. In fact, the embodiments contain fewer features than all the features of the single embodiments disclosed above.

[0201] Finally, it should be understood that the embodiments described in this application are merely illustrative of the principles of the embodiments of this application. Other modifications may also fall within the scope of this application. Therefore, alternative configurations of the embodiments of this application are considered as examples and not limitations, and are regarded as consistent with the teachings of this application. Accordingly, the embodiments of this application are not limited to the embodiments explicitly described and illustrated in this application.

Claims

1. A yarn dyeing method for real-time dyeing of continuously conveyed primary color yarn; characterized in that, The method includes: After direct-jet dyeing of the primary color yarn using macromolecular disperse dyes, post-treatment operations including at least heat fixation and plasma cleaning are performed sequentially to obtain the target dyed yarn; wherein, The molecular weight of the macromolecular disperse dye exceeds 400; the fixation time for heating is not less than 12 seconds.

2. The continuous yarn dyeing method according to claim 1, characterized in that, The color-fixing time is 30-60 seconds, and the color-fixing temperature is not less than 220℃.

3. The continuous yarn dyeing method according to claim 1, characterized in that, The plasma cleaning process has a cleaning time of 30-60 seconds, a cleaning power of 100W-300W, and a vacuum degree of 20-80Pa.

4. The continuous yarn dyeing method according to claim 4, characterized in that, The working gas used in the plasma cleaning includes oxygen or argon, with a flow rate of 10-50 sccm.

5. The continuous yarn dyeing method according to any one of claims 1-4, characterized in that, The colors of the macromolecular disperse dyes include at least cyan, magenta, yellow, and black, and the primary color yarn is white yarn.

6. The continuous yarn dyeing method according to any one of claims 1-4, characterized in that, The dyeing speed of the original color yarn is not less than 50 mm / s; or the dyeing speed is not less than 200 mm / s.

7. The continuous yarn dyeing method according to any one of claims 1-4, wherein the plasma cleaning time does not exceed 60 seconds.

8. A yarn dyeing device for real-time dyeing of continuously conveyed primary color yarn, characterized in that, The yarn dyeing equipment includes: a dyeing assembly and a post-processing assembly arranged sequentially along the conveying direction of the original yarn; The dyeing assembly is configured to directly dye the primary yarn using macromolecular disperse dyes; The post-processing assembly includes at least the color-fixing mechanism and the cleaning mechanism; the color-fixing mechanism is configured to heat and fix the dyed yarn continuously fed from the dyeing assembly; the cleaning mechanism is configured to perform plasma cleaning on the color-fixed yarn continuously fed from the color-fixing assembly. The molecular weight of the macromolecular disperse dye exceeds 400; the fixation time for heating is not less than 12 seconds; and the cleaning time for plasma cleaning does not exceed 60 seconds.

9. The continuous yarn dyeing equipment according to claim 8, characterized in that, The color-fixing component includes a heating chamber, and the cleaning component includes a vacuum cleaning chamber. A bending thread feeding mechanism is provided in the heating chamber and / or the vacuum cleaning chamber for conveying yarn in a circumferential thread feeding manner within the heating chamber and / or the vacuum cleaning chamber.

10. A dyed yarn, characterized in that the dyed yarn is prepared based on the continuous yarn dyeing method as described in any one of claims 1-7, or based on the continuous yarn dyeing equipment as described in any one of claims 8-9.

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