A process for dyeing textile yarn

Abstract

The present application relates to a kind of textile yarn dyeing processes, comprising the following steps: textile yarn is soaked in deionized water, then steam flash explosion treatment, after completion, it is obtained by drying to constant weight that pretreatment textile yarn;It is soaked using complex protease solution, after enzyme inactivation and cleaning, it is obtained that pretreatment textile yarn;It is soaked using dyeing solution, after drainage after soaking, it is obtained that dyeing textile yarn;It is soaked using processing reagent, after completion, it is obtained that textile yarn after fixing color after washing, baking solidification, washing, dehydration, drying;The preparation raw material of processing reagent, according to weight part, including five claw golden dragon alcohol extract 6-15 parts, carboxymethyl chitosan 3-10 parts, gallic acid 1-5 parts, potassium aluminum sulfate 0.5-3 parts, sodium dioctyl sulfosuccinate 0.5-2 parts, deionized water 75-85 parts.The textile yarn of the present application has excellent color fastness to perspiration alkali and perspiration acid, color fastness to artificial light, wrinkle resistance and mechanical properties, and can still maintain good after washing for many times.

Description

Technical Field

[0001] This invention belongs to the field of textile dyeing technology, and specifically relates to a textile yarn dyeing process. Background Technology

[0002] Wool and cashmere blended yarns are widely used in high-end textiles due to their excellent warmth retention. However, the scaly structure on the surface of wool and cashmere fibers, along with the presence of numerous hydrophobic amino acid residues, results in poor surface wettability, difficulty in dye penetration, and challenges in ensuring colorfastness. Traditional dyeing processes for wool and cashmere blended yarns typically employ acid dyes. However, the scaly layer on the surface of wool and cashmere fibers hinders the diffusion of dye into the fiber interior, easily leading to uneven dyeing, low dye uptake, and poor colorfastness after dyeing. Ultimately, this affects the quality and durability of the finished fabric. To achieve the desired dyeing depth, traditional processes often require increasing the dyeing temperature or extending the dyeing time, but this can easily cause felting and shrinkage of wool and cashmere fibers, as well as a decrease in strength, severely impacting the mechanical properties of the finished fabric.

[0003] Therefore, it is necessary to develop a method that can effectively improve the dyeing performance, color fastness, and mechanical properties of wool and cashmere blended yarns. Summary of the Invention

[0004] The purpose of this invention is to provide a textile yarn dyeing process to solve the above-mentioned problems.

[0005] The present invention achieves the above objectives through the following technical solutions: A textile yarn dyeing process specifically includes the following steps: Step 1: Immerse the textile yarn in deionized water, then perform a steam flash explosion treatment. After completion, remove the textile yarn and dry it to a constant weight to obtain the pretreated textile yarn. Step 2: Use a complex protease solution to soak and pretreat the textile yarn. After enzyme inactivation and washing, the pretreated textile yarn is obtained. Step 3: Soak the pretreated textile yarn in the dyeing solution, and after the soaking is complete, drain the water to obtain the dyed textile yarn; Step 4: Soak the dyed textile yarn in a treatment reagent, and then wash, bake to cure, wash with water, dehydrate and dry to obtain the dyed textile yarn. The raw materials for preparing the treatment reagent, by weight, include 6-15 parts of Five-clawed Golden Dragon alcohol extract, 3-10 parts of carboxymethyl chitosan, 1-5 parts of gallic acid, 0.5-3 parts of potassium aluminum sulfate, 0.5-2 parts of sodium dioctyl succinate sulfonate, and 75-85 parts of deionized water.

[0006] As a further optimization of the present invention, in step one, the textile yarn is obtained by blending wool fiber and cashmere fiber in a mass ratio of (6-8):(2-4).

[0007] As a further optimization of the present invention, in step one, the immersion is performed at 25-35°C for 20-30 hours. The steam flash explosion treatment is performed by holding the steam at 180-240℃ for 1-3 minutes under a pressure of 1.2-1.8MPa.

[0008] As a further optimization of the present invention, in step two, the pretreatment of textile yarn by soaking in the complex protease solution specifically involves immersing the pretreated textile yarn in the complex protease solution at a bath ratio of 1:12-18 and at a temperature of 45-55°C for 40-50 minutes. The complex protease solution contains 25,000-35,000 U / mL papain, 18,000-32,000 U / mL neutral protease, and 28,000-45,000 U / mL lipase, with a pH of 7.2-7.8.

[0009] As a further optimization of the present invention, in step three, the pre-treated textile yarn is soaked in the dyeing solution by placing the pre-treated textile yarn in the dyeing solution with a liquor ratio of 1:20, heating it to 80-90°C at 4-6°C / min, keeping it at that temperature for 70-90min, and then cooling it to 55-65°C at 1-3°C / min to drain the water and obtain the dyed textile yarn.

[0010] As a further optimization of the present invention, in step three, the dyeing solution is prepared by using deionized water as a solvent, acidic dye 1-3 g / L, anhydrous sodium sulfate 15-30 g / L, ethylenediaminetetraacetic acid 1-2.5 g / L, and acetic acid to adjust the pH to 5-5.5.

[0011] As a further optimization of the present invention, in step four, the dyed textile yarn is soaked in the treatment reagent by immersing the dyed textile yarn in the treatment reagent at a liquor ratio of 1:10-15 and at a temperature of 58-78℃ for 25-35 minutes.

[0012] As a further optimization of the present invention, in step four, the method for obtaining the ethanol extract of *Gynostemma pentaphyllum* is as follows: take the dried whole herb of *Gynostemma pentaphyllum*, dry it, crush it, sieve it, add an ethanol aqueous solution with a mass concentration of 60%-80% at a mass-to-volume ratio of 8-12 times as the extraction reagent, extract it by ultrasonic extraction for 30-60 minutes, filter it (using a filter membrane with a pore size of 1-10 μm) after extraction, concentrate it under reduced pressure and dry it to obtain the ethanol extract of *Gynostemma pentaphyllum*.

[0013] The beneficial effects of this invention are as follows: 1) This invention employs a pretreatment method of steam flash explosion before enzymatic hydrolysis of wool and cashmere blended textile yarns, combined with a treatment reagent containing five-clawed golden dragon alcohol extract for immersion treatment after dyeing. This forms a durable protective film on the surface of the wool and cashmere blended textile yarns, giving them excellent color fastness to perspiration alkali and perspiration acid, color fastness to artificial light, wrinkle resistance, and mechanical properties. Even after multiple washes, they can still maintain good appearance quality and wearing performance.

[0014] 2) In this invention, the steam flash explosion treatment makes a significant contribution to the final color fastness, mechanical properties and wrinkle resistance of wool and cashmere blended textile yarns, and the order of the steam flash explosion treatment process steps has a significant impact on the final effect. 3) This invention uses a compound protease solution for enzymatic pretreatment. Through the synergistic effect of papain, neutral protease and lipase, the protein and lipid impurities in the scale layer on the surface of wool and cashmere fibers are selectively enzymatically hydrolyzed, further gently removing the barrier layer on the fiber surface, increasing the number of active groups on the fiber surface and improving the binding sites of dyes to fibers. Detailed Implementation

[0015] The present application will now be described in further detail. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0016] I. Materials 1. Textile yarn: wool fiber and cashmere fiber are blended at a mass ratio of (6-8):(2-4). The preferred ratio is 7:3 in the following experiment. The yarn count is 70Nm. 2. Ipomoea cairica, Artemisia vulgaris, and pea plants: Ipomoea cairica and Artemisia vulgaris were purchased from Bozhou Bolintang Pharmaceutical Co., Ltd., and pea plants (Pisum sativum L.) were purchased from Shuyang Zhongying Flower and Tree Garden Co., Ltd. 3. Dyeing solution: Using deionized water as solvent, the solution contains 1-3 g / L of acidic dye, 15-30 g / L of anhydrous sodium sulfate, and 1-2.5 g / L of ethylenediaminetetraacetic acid (EDTA), with the pH adjusted to 5-5.5 by acetic acid. Preferably, the solution used in the following experiment is: using deionized water as solvent, the solution contains 2 g / L of weakly acidic brilliant blue RAW dye (purchased from Shengzhou Cyber ​​Chemical Co., Ltd.), 20 g / L of anhydrous sodium sulfate, and 1.8 g / L of EDTA, with the pH adjusted to 5.2 by acetic acid. 4. Complex protease solution: Papain 25,000-35,000 U / mL (purchased from Shanghai Anpu Experimental Technology Co., Ltd.), neutral protease 18,000-32,000 U / mL (purchased from Shanghai Yuanye Biotechnology Co., Ltd.), lipase 28,000-45,000 U / mL (purchased from Shanghai Yuanye Biotechnology Co., Ltd.), pH 7.2-7.8. The pH adjustment reagent in the complex protease solution is disodium hydrogen phosphate-citrate buffer. In the following experiments, the preferred solution contains papain 28,000 U / mL, neutral protease 30,000 U / mL, and lipase 35,000 U / mL, adjusted to pH 7.5. Note: The following experiments in this invention all use preferred parameters; Unless otherwise specified, all methods used in the following examples can be performed using conventional methods. Other materials and reagents used can be obtained commercially unless otherwise specified.

[0017] II. Methods Example 1

[0018] In this embodiment, a textile yarn dyeing process includes the following specific steps: Step 1: After immersing the textile yarn in deionized water at 28℃ for 24 hours, transfer it into the cavity of the steam flash explosion test bench. Under the pressure of 1.5MPa, keep it at 200℃ for 2 minutes. After the steam flash explosion treatment, take out the textile yarn and dry it in an oven at 105℃ until constant weight to obtain the pretreated textile yarn. Step 2: Immerse the pretreated textile yarn in a compound protease solution at a bath ratio of 1:15 and a temperature of 50°C for 45 minutes. After the immersion treatment, raise the temperature to 95°C and hold for 10 minutes to inactivate the enzyme. Remove the yarn and wash it with cold water to obtain the pretreated textile yarn. Step 3: Immerse the pretreated textile yarn in the dyeing solution with a liquor ratio of 1:20, heat to 85℃ at 5℃ / min, keep warm for 90min, and then cool to 60℃ at 2℃ / min to drain the water and obtain the dyed textile yarn. Step 4: Immerse the dyed textile yarn in the treatment reagent at a liquor ratio of 1:12 and treat it at 68℃ for 30 minutes. Then wash it with 40℃ warm water for 12 minutes and bake it at 65℃ for 15 minutes. After washing, dehydrating and drying, the color-fixed textile yarn is obtained. The raw materials for preparing the treatment reagent, by weight, include 6 parts of five-clawed golden dragon alcohol extract, 8 parts of carboxymethyl chitosan, 2.5 parts of gallic acid, 2.5 parts of potassium aluminum sulfate, 2 parts of sodium dioctyl succinate sulfonate, and 79 parts of deionized water. The method for obtaining the alcohol extract of *Gynostemma pentaphyllum* is as follows: take the dried whole herb of *Gynostemma pentaphyllum*, dry it, crush it, pass it through an 80-mesh sieve, add 10 times the mass of a 68% ethanol aqueous solution as the extraction reagent, and extract it by ultrasonication for 45 minutes. After extraction, filter it (using a filter membrane with a pore size of 1-10 μm, preferably a filter membrane with a pore size of 0.6 μm), concentrate it under reduced pressure, and dry it to obtain the alcohol extract of *Gynostemma pentaphyllum*.

[0019] Example 2

[0020] In this embodiment, a textile yarn dyeing process is provided. Based on Example 1, the raw materials for preparing the treatment reagent are adjusted. The specific adjustment is as follows: The raw materials for preparing the treatment reagent, by weight, include 10 parts of Five-clawed Golden Dragon alcohol extract, 5 parts of carboxymethyl chitosan, 3 parts of gallic acid, 1.5 parts of potassium aluminum sulfate, 1.5 parts of sodium dioctyl succinate sulfonate, and 79 parts of deionized water. Everything else is consistent with Example 1.

[0021] Example 3

[0022] In this embodiment, a textile yarn dyeing process is provided. Based on Example 1, the raw materials for preparing the composite reagent are adjusted. The specific adjustment is as follows: The raw materials for preparing the treatment reagent, by weight, include 15 parts of five-clawed golden dragon alcohol extract, 4.6 parts of carboxymethyl chitosan, 1.5 parts of gallic acid, 2.1 parts of potassium aluminum sulfate, 1.8 parts of sodium dioctyl succinate sulfonate, and 75 parts of deionized water. Everything else is consistent with Example 1.

[0023] Comparative Example 1 In this comparative example, a textile yarn dyeing process is provided. Based on Example 2, the raw materials for preparing the treatment reagent are adjusted as follows: The raw materials for preparing the treatment reagent, by weight, include 10 parts of water extract of *Gynostemma pentaphyllum*, 5 parts of carboxymethyl chitosan, 3 parts of gallic acid, 1.5 parts of potassium aluminum sulfate, 1.5 parts of sodium dioctyl succinate sulfonate, and 79 parts of deionized water. The method for obtaining the water extract of Five-Clawed Golden Dragon is as follows: take the dried whole herb of Five-Clawed Golden Dragon, dry it, crush it, pass it through an 80-mesh sieve, add water at a mass-to-volume ratio of 8-12 times as the extraction reagent, extract it by ultrasonication for 45 minutes, filter it after extraction (using a filter membrane with a pore size of 1-10 μm, preferably a filter membrane with a pore size of 0.6 μm), concentrate it under reduced pressure and dry it to obtain the water extract of Five-Clawed Golden Dragon. Everything else is consistent with Example 2.

[0024] Comparative Example 2 In this comparative example, a textile yarn dyeing process is provided. Based on Example 4, the raw materials for preparing the treatment reagent are adjusted as follows: The raw materials for preparing the treatment reagent, by weight, include 10 parts of Artemisia argyi alcohol extract, 5 parts of carboxymethyl chitosan, 3 parts of gallic acid, 1.5 parts of potassium aluminum sulfate, 1.5 parts of sodium dioctyl succinate sulfonate, and 79 parts of deionized water. The method for obtaining Artemisia argyi alcohol extract is as follows: take dried whole Artemisia argyi, dry it, crush it, pass it through an 80-mesh sieve, add 10 times the mass of 68% ethanol aqueous solution as the extraction reagent, extract it by ultrasonication for 45 minutes, filter it after extraction (using a filter membrane with a pore size of 1-10 μm, preferably a filter membrane with a pore size of 0.6 μm), concentrate it under reduced pressure and dry it to obtain Artemisia argyi alcohol extract; Everything else is consistent with Example 2.

[0025] Comparative Example 3 In this comparative example, a textile yarn dyeing process is provided. Based on Example 4, the raw materials for preparing the treatment reagent are adjusted as follows: The raw materials for preparing the treatment reagent, by weight, include 10 parts of pea plant alcohol extract, 5 parts of carboxymethyl chitosan, 3 parts of gallic acid, 1.5 parts of potassium aluminum sulfate, 1.5 parts of sodium dioctyl succinate sulfonate, and 79 parts of deionized water. The method for obtaining pea plant ethanol extract is as follows: take whole dried pea plants, air dry them, crush them, pass them through an 80-mesh sieve, add 10 times the mass volume of 68% ethanol aqueous solution as the extraction reagent, extract with ultrasound for 45 minutes, filter after extraction (using a filter membrane with a pore size of 1-10 μm, preferably a filter membrane with a pore size of 0.6 μm), concentrate under reduced pressure and dry to obtain pea plant ethanol extract; Everything else is consistent with Example 2.

[0026] Comparative Example 4 In this comparative example, a textile yarn dyeing process is provided. Based on Example 4, the raw materials for preparing the treatment reagent are adjusted as follows: The raw materials for preparing the treatment reagent, by weight, include 5 parts carboxymethyl chitosan, 3 parts gallic acid, 1.5 parts potassium aluminum sulfate, 1.5 parts sodium dioctyl succinate sulfonate, and 89 parts deionized water. Everything else is consistent with Example 2.

[0027] Comparative Example 5 In this comparative example, a textile yarn dyeing process is provided, the specific steps of which are shown below: Step 1: Immerse the textile yarn in a compound protease solution at a bath ratio of 1:15 and a temperature of 50°C for 45 minutes. After the immersion treatment, raise the temperature to 95°C and hold for 10 minutes to inactivate the enzyme. Remove the yarn and wash it with cold water to obtain the pretreated textile yarn. Step 2: Immerse the pretreated textile yarn in the dyeing solution with a liquor ratio of 1:20, heat to 85℃ at 5℃ / min, keep warm for 90min, and then cool to 60℃ at 2℃ / min to drain the water and obtain the dyed textile yarn. Step 3: Immerse the dyed textile yarn in the treatment reagent at a liquor ratio of 1:12 and treat it at 68℃ for 30 minutes. Then wash it with 40℃ warm water for 12 minutes and bake it at 65℃ for 15 minutes. After washing, dehydrating and drying, the color-fixed textile yarn is obtained. The raw materials for preparing the treatment reagent, by weight, include 10 parts of Five-Clawed Golden Dragon alcohol extract, 5 parts of carboxymethyl chitosan, 3 parts of gallic acid, 1.5 parts of potassium aluminum sulfate, 1.5 parts of sodium dioctyl succinate sulfonate, and 79 parts of deionized water. The method for obtaining the alcohol extract of *Gynostemma pentaphyllum* is as follows: take the dried whole herb of *Gynostemma pentaphyllum*, dry it, crush it, pass it through an 80-mesh sieve, add 10 times the mass of a 68% ethanol aqueous solution as the extraction reagent, and extract it by ultrasonication for 45 minutes. After extraction, filter it (using a filter membrane with a pore size of 1-10 μm, preferably a filter membrane with a pore size of 0.6 μm), concentrate it under reduced pressure, and dry it to obtain the alcohol extract of *Gynostemma pentaphyllum*.

[0028] Comparative Example 6 In this comparative example, a textile yarn dyeing process is provided, the specific steps of which are shown below: Step 1: Immerse the textile yarn in a compound protease solution at a bath ratio of 1:15 and a temperature of 50°C for 45 minutes. After the immersion treatment, raise the temperature to 95°C and hold for 10 minutes to inactivate the enzyme. Remove the yarn and wash it with cold water to obtain the pretreated textile yarn. Step 2: After immersing the textile yarn in deionized water at 28℃ for 24 hours, it is transferred into the cavity of the steam flash explosion test bench and kept at 200℃ for 2 minutes under a pressure of 1.5MPa. After the steam flash explosion treatment, the textile yarn is taken out and dried in an oven at 105℃ until constant weight, thus obtaining the pretreated textile yarn. Step 3: Immerse the pretreated textile yarn in the dyeing solution with a liquor ratio of 1:20, heat to 85℃ at 5℃ / min, keep warm for 90min, and then cool to 60℃ at 2℃ / min to drain the water and obtain the dyed textile yarn. Step 3: Immerse the dyed textile yarn in the treatment reagent at a liquor ratio of 1:12 and treat it at 68℃ for 30 minutes. Then wash it with 40℃ warm water for 12 minutes and bake it at 65℃ for 15 minutes. After washing, dehydrating and drying, the color-fixed textile yarn is obtained. The raw materials for preparing the treatment reagent, by weight, include 10 parts of Five-Clawed Golden Dragon alcohol extract, 5 parts of carboxymethyl chitosan, 3 parts of gallic acid, 1.5 parts of potassium aluminum sulfate, 1.5 parts of sodium dioctyl succinate sulfonate, and 79 parts of deionized water. The method for obtaining the alcohol extract of *Gynostemma pentaphyllum* is as follows: take the dried whole herb of *Gynostemma pentaphyllum*, dry it, crush it, pass it through an 80-mesh sieve, add 10 times the mass of a 68% ethanol aqueous solution as the extraction reagent, and extract it by ultrasonication for 45 minutes. After extraction, filter it (using a filter membrane with a pore size of 1-10 μm, preferably a filter membrane with a pore size of 0.6 μm), concentrate it under reduced pressure, and dry it to obtain the alcohol extract of *Gynostemma pentaphyllum*.

[0029] Blank group In this blank group, a textile yarn dyeing process is provided, the specific steps of which are as follows: Step 1: Immerse the textile yarn in a compound protease solution at a bath ratio of 1:15 and a temperature of 50°C for 45 minutes. After the immersion treatment, raise the temperature to 95°C and hold for 10 minutes to inactivate the enzyme. Remove the yarn and wash it with cold water to obtain the pretreated textile yarn. Step 2: Immerse the pretreated textile yarn in the dyeing solution with a liquor ratio of 1:20, heat to 85℃ at 5℃ / min, keep warm for 90min, and then cool to 60℃ at 2℃ / min to drain the water and obtain the dyed textile yarn. Step 3: Immerse the dyed textile yarn in the treatment reagent at a liquor ratio of 1:12 and treat it at 68℃ for 30 minutes. Then wash it with 40℃ warm water for 12 minutes and bake it at 65℃ for 15 minutes. After washing, dehydrating and drying, the color-fixed textile yarn is obtained. The raw materials for preparing the treatment reagent, by weight, include 5 parts carboxymethyl chitosan, 3 parts gallic acid, 1.5 parts potassium aluminum sulfate, 1.5 parts sodium dioctyl succinate sulfonate, and 89 parts deionized water.

[0030] III. Performance Testing The fabric samples obtained in the following experiments (1)-(3) were obtained by weaving the fixed-color textile yarns obtained in Examples 1-3, Comparative Examples 1-6 and the blank group as warp and weft yarns to obtain fabric samples. The fabric samples were plain weave, and the warp yarns were 60 threads / cm and the weft yarns were 75 threads / cm.

[0031] (1) Fabric color fastness performance test Color fastness to artificial light of each group of fabrics: The color fastness to artificial light of the fabric samples from Examples 1-3, Comparative Examples 1-6, and the blank group were tested according to the determination method of GB / T 8427-1998 Textiles - Tests for color fastness to artificial light: Xenon arc. The evaluation grades were 5, 4-5, 4, 3-4, 3, 2-3, 2, 1-2, and 1, respectively. Grade 5 was the best, grade 1 was the worst, and 1-2 was between grade 1 and grade 2. The testers compared and identified the samples, and the results are shown in Table 1 below. Colorfastness to perspiration for each group of fabrics: The colorfastness to perspiration for the fabric samples of Examples 1-3, Comparative Examples 1-6, and the blank group were determined according to GB / T 3922-2013 "Textiles - Tests for Colorfastness - Colorfastness to Perspiration". The cotton staining grade of colorfastness to perspiration was assessed using GB / T 251-2008 "Textiles - Tests for Colorfastness - Assessment of Staining - Gray Scale". The colorfastness to perspiration grades were 5, 4-5, 4, 3-4, 3, 2-3, 2, 1-2, and 1, respectively; grade 5 was the best, grade 1 was the worst, and 1-2 was between grade 1 and 2. The inspectors compared and evaluated the samples, specifically including colorfastness to alkali staining and colorfastness to acid staining. The results are shown in Table 1 below. Table 1. Fabric Colorfastness Test Data Recording Table Experimental Conclusions: Based on the data analysis in Table 1, it can be seen that the fabric samples of Examples 1-3 all exhibited excellent color fastness performance, with Example 2 showing the best overall color fastness performance, significantly superior to the blank group and each comparative group. The experiment found that compared to pea plant alcohol extract, Artemisia argyi alcohol extract, and Achyranthes bidentata water extract, the color-fixing effect of Achyranthes bidentata alcohol extract was significantly improved, indicating that the specific components in Achyranthes bidentata alcohol extract play an irreplaceable role in improving the color fastness of wool and cashmere blended fabrics, and other plant extracts are unlikely to achieve the same color-fixing effect. Furthermore, the steam flash treatment makes a significant contribution to the final color fastness of wool and cashmere blended fabrics, and the order of the steam flash treatment process steps has a significant impact on the final effect.

[0032] (2) Fabric mechanical property testing Each group of fabric samples was washed 30 times: The fabric samples of Examples 1-3, Comparative Examples 1-6 and the blank group were subjected to water washing tests according to the procedures specified in the standard GB / T 8629-2017 Textile Testing - Household Washing and Drying Procedures. A type A washing machine was used for the water washing test, with a total load of 2.0 kg, a 4N program (40℃ normal agitation) for 28 minutes, and 30 water washing cycles. After the last water washing cycle, the samples were dehydrated for 5 minutes and then hung to dry.

[0033] Mechanical property testing of each group of fabrics: Stress-strain tests were performed on the fabric samples of Examples 1-3, Comparative Examples 1-6, and the blank group using a Q800 Dynamic Mechanical Analyzer (DMA, TA Instruments, Inc., USA) to determine the sample strength and elastic modulus. The samples were cut into strips of 30×10mm and placed in a tensile fixture, with one end fixed and the other end movable. The temperature was maintained at 25℃, the frequency was set to 3Hz, and the applied stress was gradually increased from 0 at a rate of 5MPa / s. The strain change of the sample was recorded until the sample fractured. The stress at the fracture point was taken as the tensile strength of the sample. The test data are shown in Table 2. Table 2. Data Recording Table for Mechanical Properties of Fabrics in Each Group Experimental Conclusion: Based on the analysis in Table 2, it can be seen that the fabric samples of Examples 1-3 all maintained high tensile strength. The tensile strength of the unwashed samples was 14.9-16.2 MPa, and after 30 washes, it remained at 13.7-15.6 MPa, showing a high strength retention rate. This indicates that the treatment reagent containing the alcohol extract of the five-clawed golden dragon combined with the steam flash explosion treatment process before enzymatic hydrolysis causes minimal damage to wool and cashmere blended fabrics. It can effectively improve the mechanical properties of wool and cashmere blended fabrics while improving dyeing performance, and can meet the durability requirements of high-quality fabrics.

[0034] (3) Fabric wrinkle resistance test Wrinkle resistance test of each group of fabrics: Following the umbrella method of the "FZ / T 01045-1996 Standard Test", the fabric samples of Examples 1-3, Comparative Examples 1-6, and the blank group (the method for obtaining fabric samples after 30 washes was consistent with the above) were measured using a YG 811 fabric drape meter. This drape was used as the standard for testing the wrinkle resistance of the fabrics. The drape coefficient F = (S3-S2) / (S1-S2), where S1 is the sample area, S2 is the clamping plate area, and S3 is the projected area of ​​the fabric sample. Five measurements were taken, and the average value was recorded. The test data are shown in Table 3. Table 3. Data Recording Table for Gloss Performance Tests of Each Group of Fabrics Experimental Conclusion: Based on the data analysis in Table 3, the fabric samples of Examples 1-3 exhibit excellent wrinkle resistance, indicating that the fabric treated by this invention has good morphological stability and wrinkle resistance durability. This invention forms a durable protective film on the fabric surface through a steam flash explosion treatment process before enzymatic hydrolysis combined with a treatment reagent containing five-clawed golden dragon alcohol extract, enabling wool and cashmere blended fabrics to obtain excellent wrinkle resistance and morphological stability, and maintain good appearance quality and wearing performance even after multiple washes.

[0035] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. A dyeing process for textile yarns, characterized in that: Specifically, the following steps are included: Step 1: Immerse the textile yarn in deionized water, then perform a steam flash explosion treatment. After completion, remove the textile yarn and dry it to a constant weight to obtain the pretreated textile yarn. Step 2: Use a complex protease solution to soak and pretreat the textile yarn. After enzyme inactivation and washing, the pretreated textile yarn is obtained. Step 3: Soak the pretreated textile yarn in the dyeing solution, and after soaking and draining, obtain the dyed textile yarn; Step 4: Soak the dyed textile yarn in a treatment reagent, and then wash, bake to cure, wash with water, dehydrate and dry to obtain the dyed textile yarn. The raw materials for preparing the treatment reagent, by weight, include 6-15 parts of Five-clawed Golden Dragon alcohol extract, 3-10 parts of carboxymethyl chitosan, 1-5 parts of gallic acid, 0.5-3 parts of potassium aluminum sulfate, 0.5-2 parts of sodium dioctyl succinate sulfonate, and 75-85 parts of deionized water.

2. The textile yarn dyeing process according to claim 1, characterized in that: In step one, the textile yarn is obtained by blending wool fiber and cashmere fiber in a mass ratio of (6-8):(2-4).

3. The textile yarn dyeing process according to claim 1, characterized in that: In step one, the immersion is performed at 25-35°C for 20-30 hours; The steam flash explosion treatment is performed by holding the steam at 180-240℃ for 1-3 minutes under a pressure of 1.2-1.8MPa.

4. The textile yarn dyeing process according to claim 1, characterized in that: In step two, the pretreatment of textile yarn by soaking in the complex protease solution specifically involves immersing the pretreated textile yarn in the complex protease solution at a bath ratio of 1:12-18 and at a temperature of 45-55℃ for 40-50 minutes. The complex protease solution contains 25,000-35,000 U / mL papain, 18,000-32,000 U / mL neutral protease, and 28,000-45,000 U / mL lipase, with a pH of 7.2-7.

8.

5. The textile yarn dyeing process according to claim 1, characterized in that: In step three, the pre-treated textile yarn is soaked in the dyeing solution. Specifically, the pre-treated textile yarn is placed in the dyeing solution with a liquor ratio of 1:20, heated to 80-90℃ at 4-6℃ / min, kept at the temperature for 70-90min, and then cooled to 55-65℃ at 1-3℃ / min. After draining the solution, the dyed textile yarn is obtained.

6. The textile yarn dyeing process according to claim 1, characterized in that: In step three, the dyeing solution is prepared by using deionized water as a solvent, containing 1-3 g / L of acidic dye, 15-30 g / L of anhydrous sodium sulfate, 1-2.5 g / L of ethylenediaminetetraacetic acid, and adjusting the pH to 5-5.5 with acetic acid.

7. The textile yarn dyeing process according to claim 1, characterized in that: In step four, the dyed textile yarn is soaked in the treatment reagent by immersing it in the treatment reagent at a liquor ratio of 1:10-15 for 25-35 minutes at a temperature of 58-78℃.

8. The textile yarn dyeing process according to claim 1, characterized in that: In step four, the method for obtaining the ethanol extract of *Gynostemma pentaphyllum* is as follows: take the dried whole herb of *Gynostemma pentaphyllum*, dry it, crush it, sieve it, add an ethanol aqueous solution with a mass concentration of 60%-80% at a mass-volume ratio of 8-12 times as the extraction reagent, and extract it by ultrasonic extraction for 30-60 minutes. After extraction, filter it, concentrate it under reduced pressure and dry it to obtain the ethanol extract of *Gynostemma pentaphyllum*.

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