Preparation method of waterproof, antifouling and anti-wrinkle high twist cashmere wool yarn

Abstract

The present application relates to a kind of waterproof antifouling wrinkle-resistant high twist cashmere wool yarn, and the high twist yarn of cashmere fiber and wool fiber blend is treated to obtain by composite finishing liquid;The composite finishing liquid includes wool peptide grafting polysiloxane copolymer, multiple anchor, arabic gum grafting epichlorohydrin, wool keratin hydrolysate, polyoxyethylene sorbitan monolaurate, polyglyceryl-3 diisostearate and deionized water.The composite finishing liquid of the present application uses wool peptide grafting polysiloxane copolymer as waterproof antifouling agent, and is homologous compatible with cashmere wool fiber, avoids the hand feeling rigid caused by traditional fluorine reagent;Collaborate arabic gum grafting epichlorohydrin wrinkle-resistant enhancer, and synergistically strengthen wrinkle-resistant performance with high twist structure, simultaneously realize the firm adhesion of functional layer by multiple anchor, give consideration to waterproof antifouling and wrinkle-resistant effect, solve the problem of traditional fluorine waterproof agent hand feeling rigid, function easy to fall off, wrinkle resistance decreases.

Description

Technical Field

[0001] This invention relates to the field of wool and cashmere fabric technology, specifically to a method for preparing a waterproof, stain-resistant, and wrinkle-resistant high-twist cashmere and wool yarn. Background Technology

[0002] High-twist cashmere and wool yarns, with their dense structure formed by high twist, naturally possess superior wrinkle resistance compared to ordinary yarns, while retaining the core advantages of cashmere and wool fibers—softness, warmth, and breathability—making them widely used in the production of high-end apparel fabrics. However, the surface of natural cashmere and wool fibers is rich in hydrophilic groups, and the high-twist structure only optimizes wrinkle resistance; it cannot solve the inherent defects of easy water absorption and staining. When exposed to water, the yarn easily becomes damp, its warmth retention decreases, and it is difficult to clean oil and water stains, seriously affecting the wearing experience and the durability of the fabric's appearance.

[0003] Currently, the main methods for adding water and stain resistance to cashmere and wool yarns are post-treatment impregnation with waterproofing agents or coatings. However, these methods have significant drawbacks: When simply impregnating with waterproofing agents (such as traditional fluorinated agents), the dense structure of high-twist yarns makes it difficult for the agent to penetrate evenly, resulting in weak adhesion of the functional layer. Coating treatments, on the other hand, clog the fiber gaps in high-twist yarns, damaging their natural breathability and causing the yarn to feel stiff, losing the softness of cashmere and wool. Furthermore, existing processes do not fully consider the structural characteristics of high-twist yarns when designing suitable functional finishing solutions, easily leading to insufficient retention of wrinkle resistance or uneven water and stain resistance. Therefore, how to stably impart water and stain resistance without damaging the original wrinkle resistance and natural properties of high-twist cashmere and wool yarns through process adaptation has become a pressing technical need for the industry. Summary of the Invention

[0004] The purpose of this invention is to provide a method for preparing waterproof, stain-resistant, and wrinkle-resistant high-twist cashmere and wool yarn in order to solve the above-mentioned problems.

[0005] The present invention achieves the above objectives through the following technical solutions: This invention provides a waterproof, stain-resistant, and wrinkle-resistant high-twist cashmere-wool yarn, which is obtained by treating a high-twist yarn made of cashmere and wool fibers with a composite finishing solution; the composite finishing solution contains wool peptide-grafted polysiloxane copolymer, multiple anchoring agents, gum arabic-grafted epichlorohydrin, wool keratin hydrolysate, polyoxyethylene dehydrated sorbitan monolaurate, polyglycerol-3 diisostearate, and deionized water; the multiple anchoring agents are silane coupling agent KH-590 and tannic acid compounded in a mass ratio of (1~4):(1~4).

[0006] As a further optimization of the above invention, the raw materials of the composite finishing liquid include, by weight: 20-30 parts of wool peptide grafted polysiloxane copolymer, 10-20 parts of multiple anchoring agent, 6-10 parts of gum arabic grafted epichlorohydrin, 30-40 parts of wool keratin hydrolysate, 1-2 parts of polyoxyethylene dehydrated sorbitan monolaurate, 2-4 parts of polyglycerol-3 diisostearate, and 12-13 parts of deionized water.

[0007] As a further optimization of the above invention, the preparation method of the composite finishing solution includes the following steps: adding wool keratin hydrolysate and deionized water to a reaction vessel and stirring until completely dissolved; adding wool peptide-grafted polysiloxane copolymer and gum arabic-grafted epichlorohydrin to the resulting solution, heating and stirring to form a uniform emulsion; cooling and adding KH-590 and tannic acid to the emulsion and stirring; then sequentially adding polyoxyethylene dehydrated sorbitan monolaurate and polyglycerol-3 diisostearate and stirring, ultrasonically dispersing, adjusting the pH, and allowing to stand to defoam, thereby obtaining the composite finishing solution.

[0008] As a further optimization of the above invention, the wool keratin hydrolysate and deionized water are stirred at 35-45°C for 20-30 minutes until dissolved; wool peptide-grafted polysiloxane copolymer and gum arabic-grafted epichlorohydrin are added and stirred at 45-55°C for 55-65 minutes to form a uniform emulsion; the temperature is lowered to 32-38°C and stirred for 25-35 minutes; then stirred for 25-35 minutes, ultrasonically dispersed for 13-17 minutes, and the pH is adjusted to 6.5-7.0.

[0009] As a further optimization of the above invention, the preparation method of the wool peptide-grafted polysiloxane copolymer includes the following steps: dissolving wool peptide in ethanol and adding an antioxidant to obtain a wool peptide ethanol solution; dispersing γ-glycidoxypropyltrimethoxysilane in ethanol, adding deionized water dropwise for hydrolysis to obtain a silane hydrolysate; adding the wool peptide ethanol solution dropwise to the silane hydrolysate, adjusting the pH with triethylamine, and adding dibutyltin dilaurate to catalyze the reaction; after the reaction is completed, the mixture is successively diluted, centrifuged, distilled under reduced pressure, and pulverized to obtain the wool peptide-grafted polysiloxane copolymer.

[0010] As a further optimization of the above invention, when preparing the wool peptide-grafted polysiloxane copolymer, the temperature for dissolving the wool peptide is 35~40℃; the temperature for hydrolyzing γ-glycidoxypropyltrimethoxysilane is 40~45℃, and the stirring time is 30~60min; during the catalytic reaction, the pH is adjusted to 7.0~7.5, the reaction temperature is 60~70℃, and the reaction time is 2.5~4h.

[0011] As a further optimization of the above invention, the preparation method of gum arabic grafted epichlorohydrin includes the following steps: dissolving gum arabic in deionized water, heating to dissolve and then adding sodium hydroxide for activation; adding epichlorohydrin dropwise to carry out the grafting reaction; after the reaction is completed, adjusting the pH with glacial acetic acid, and then centrifuging, washing, vacuum drying and pulverizing to obtain gum arabic grafted epichlorohydrin.

[0012] As a further optimization of the above invention, when preparing gum arabic grafted epichlorohydrin, the dissolution temperature is 55~60℃, the activation pH is 10.0~10.5, the activation time is 25~35min; the grafting reaction temperature is 40~50℃, the final viscosity is 30~35mPa·s; and the final product pH is 6.5~7.0.

[0013] This invention provides a method for preparing waterproof, stain-resistant, and wrinkle-resistant high-twist cashmere wool yarn, comprising the following steps: mixing cashmere fibers and wool fibers, and spinning them into high-twist cashmere wool yarn through carding, drawing, roving, and spinning processes; subjecting the obtained high-twist cashmere wool yarn to ultrasonic cleaning and vacuum drying, followed by low-temperature plasma treatment to introduce active sites on the fiber surface; immersing the pretreated yarn in a prepared composite finishing solution, and subjecting it to padding, gradient drying, baking curing, and relaxation treatment to obtain waterproof, stain-resistant, and wrinkle-resistant high-twist cashmere wool yarn.

[0014] As a further optimization of the above invention, the ultrasonic cleaning temperature is 35~40℃, the ultrasonic power is 105~115W, and the processing time is 16~20min; the low-temperature plasma treatment power is 80~100W, the treatment distance is 6~8cm, and the processing time is 3~5min; the padding temperature is 35~45℃, the immersion time is 20~24min, and the roll pressure is 0.13~0.17MPa; the gradient drying involves first pre-drying at 80~85℃ for 20~30min, and then raising the temperature to 85~95℃ for 15~20min; the baking curing temperature is 110~120℃, and the time is 4~6min; the relaxation treatment temperature is 60~70℃, and the treatment time is 25~30min.

[0015] The beneficial effects of this invention are as follows: This invention uses wool peptide-grafted polysiloxane copolymer as a waterproof and stain-resistant agent, KH-590 and tannic acid compounded as multiple anchoring agents, and gum arabic grafted epichlorohydrin as an anti-wrinkle reinforcing agent. This avoids the stiff feel problem caused by traditional fluorinated reagents. Through the synergistic effect of chemical covalent bonds and multiple hydrogen bonds, a strong adhesion of the functional layer is achieved, which, together with the yarn's high-twist structure, enhances the anti-wrinkle performance. Experimental verification shows that the yarn prepared by this invention has a hydrostatic pressure of 4.8 kPa, a stain resistance of 4.5, and an anti-wrinkle performance of 4.5, significantly better than other control groups. Through the synergistic effect of each component and process adaptation, this invention imparts excellent waterproof and stain-resistant properties to the yarn while synergistically enhancing its anti-wrinkle performance, demonstrating significant technological progress and practical value. Detailed Implementation

[0016] 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.

[0017] 1. Explanation The specific testing method for this experiment is as follows: (1) Anti-wrinkle performance test The test was conducted according to GB / T 29257-2012, "Appearance Method for Assessing the Wrinkle Recovery of Textile Fabrics". A sample of specified size was cut from the standard sample, conditioned under standard atmospheric conditions, placed in a wrinkle tester, twisted at a certain angle, and then subjected to a load. After removing the load, the sample was allowed to recover for a specified time under standard atmospheric conditions. The sample was then visually rated by comparing it to a standard photograph under specified lighting conditions. (Grades range from 1 to 5, with 1 being the worst and 5 the best.) (2) Water resistance test The test was conducted according to GB / T 4744-2013 "Test and Evaluation of Waterproof Performance of Textiles - Hydrostatic Test".

[0018] Braid the yarn into a standard sample (100mm × 100mm) and fix it on the testing instrument fixture, ensuring no wrinkles or leaks. Slowly inject water under the sample at a pressure increase rate of 1 kPa / min, and record the hydrostatic pressure value when the first drop of water leaks. Perform each test three times and take the average value. The higher the value, the stronger the waterproof performance.

[0019] (3) Antifouling performance test The test was conducted according to GB / T 30159.1-2013 "Textiles - Test and Evaluation of Stain Resistance - Part 1: Stain Resistance". Two samples were cut from different parts of the fabric and conditioned under standard atmospheric conditions. The samples were placed flat on two layers of filter paper, and 0.05 mL of dirt was dropped onto three points on each sample. After 30 seconds, each droplet was observed at a 45° angle. The droplet morphology was visually rated using a 5-point scale (5 being the best and 1 being the worst).

[0020] Unless otherwise specified, all methods used in this invention are conventional methods known to those skilled in the art. Where specific conditions are not specified, they shall be performed according to conventional conditions or conditions recommended by the manufacturer. Where the manufacturers of reagents or instruments are not specified, they are all conventional products that can be purchased commercially.

[0021] 2. Preparation of waterproof, stain-resistant, and wrinkle-resistant high-twist cashmere and wool yarn (1) Preparation of wool peptide grafted polysiloxane copolymer 20 parts of wool peptide were added to 40 parts of ethanol and stirred at 35°C and 500 rpm for 30 min until completely dissolved. 0.5 parts of antioxidant were added and stirring continued for 15 min to obtain a wool peptide ethanol solution. Separately, 30 parts of γ-glycidyl etheroxypropyltrimethoxysilane (KH-560) were added to 9.5 parts of ethanol and stirred for 10 min. At 42°C and 600 rpm, 8 parts of deionized water were slowly added dropwise over 30 min, and the mixture was stirred at a constant temperature for 40 min to complete the hydrolysis of KH-560. The above wool peptide ethanol solution was then slowly and uniformly added dropwise to the KH-560 hydrolysate at 45°C and 600 rpm, with the addition time controlled at 40 min. After the addition was complete, 1.2 parts of triethylamine were added to adjust the pH of the system to 7.3. The temperature was raised to 65°C, and 0.8 parts of dibutyltin dilaurate (DBTDL) were added. The stirring speed was increased to 800 rpm and the reaction was carried out at a constant temperature for 3.5 h until the system viscosity reached 22. Using dibutyltin dilaurate as a catalyst, the ring-opening reaction of epoxy groups and amino groups was promoted. The reaction system was then cooled to 30°C and the rotation speed was reduced to 500 r / min. One part of ethanol was added for dilution and stirring for 10 min. Then, the mixture was centrifuged at 8000 r / min for 20 min to remove impurities. The supernatant was collected and concentrated by vacuum distillation at 45°C and -0.08 MPa until the solid content was ≥95%. Finally, the concentrated product was pulverized to 80 mesh to obtain the wool peptide grafted polysiloxane copolymer.

[0022] Preparation of gum arabic grafted epichlorohydrin Add 35 parts of gum arabic to 45 parts of deionized water, and stir at 58℃ and 450 rpm for 60 min until completely dissolved. Add 0.3 parts of antioxidant and continue stirring for 15 min. After cooling to 45℃, add 2.2 parts of sodium hydroxide and stir for 30 min to adjust the pH of the system to 10.2 to obtain an activated gum arabic aqueous solution for later use. Separately, take 8 parts of epichlorohydrin and slowly and evenly add it dropwise to the above activated solution over 45 min at 45℃ and 500 rpm. After the addition is complete, maintain 45℃ and 500 rpm. The reaction was carried out at a constant temperature, and the viscosity was measured every 30 minutes until the system viscosity reached 32 mPa·s. After the reaction was completed, the temperature was lowered to 30℃, the rotation speed was reduced to 400 r / min, the pH of the system was adjusted to 6.8 with glacial acetic acid, 1.5 parts of ethanol were added for dilution and stirred for 15 minutes, and then centrifuged at 8000 r / min for 20 minutes to remove the supernatant. The precipitate was collected and washed three times with ethanol. The washed precipitate was placed in a vacuum drying oven at 60℃ and dried for 8 hours. Finally, the dried product was pulverized into 100 mesh powder to obtain gum arabic grafted epichlorohydrin.

[0023] (3) Preparation of composite finishing solution The raw materials for preparing the composite finishing solution, by weight, include: 25 parts of wool peptide grafted polysiloxane copolymer, 15 parts of multiple anchoring agents (silane coupling agent KH-590 and tannic acid, mass ratio 1:1), 8 parts of gum arabic grafted epichlorohydrin (modified plant gum, anti-wrinkle reinforcing agent), 35 parts of wool keratin hydrolysate (compatibility regulator), 1.5 parts of polyoxyethylene dehydrated sorbitan monolaurate (penetration regulator), 3 parts of polyglycerol-3 diisostearate (flexibility regulator), and 12.5 parts of deionized water.

[0024] Wool keratin hydrolysate and deionized water were added to a stainless steel reactor. The mixture was heated to 40°C at 600 rpm and stirred at this temperature for 25 minutes until the wool keratin hydrolysate was completely dissolved, forming a transparent and homogeneous base solution. Wool peptide-grafted polysiloxane copolymer and gum arabic-grafted epichlorohydrin were then added sequentially to the base solution. The temperature was raised to 50°C, and the stirring speed was increased to 800 rpm. The mixture was stirred at this temperature for 60 minutes until the system formed a homogeneous emulsion without stratification or visible agglomerates. The reaction system temperature was lowered to 35°C, and the stirring speed was maintained at 800 rpm. KH-590 and tannic acid were added at a mass ratio of 1:1, and the mixture was stirred for 30 minutes. Then, polyoxyethylene sorbitan monolaurate (penetrating agent) and polyglycerol-3 diisostearate (softening agent) were added sequentially. The mixture was stirred for another 30 minutes until the system was homogeneous and stable, with no agglomeration.

[0025] Finally, the mixture was transferred to an ultrasonic dispersion vessel at 200W and ultrasonicated for 15 minutes to eliminate air bubbles and further improve the homogeneity of the system. The pH value of the finishing solution was checked and adjusted to 6.8, and the viscosity was controlled at 65 mPa·s. The mixture was allowed to stand at room temperature for 30 minutes until the air bubbles were completely eliminated, thus obtaining the composite finishing solution. It was then sealed and stored in a cool, dry place for later use.

[0026] (4) Preparation of waterproof, stain-resistant and wrinkle-resistant high-twist cashmere and wool yarn Cashmere and wool fibers are mixed in a conventional ratio. After the blending is completed, the yarn is spun into high-twist cashmere and wool yarn (FZ / T 73009) through processes such as carding, drawing, roving, and spinning, ensuring that the yarn has uniform twist and no loose twist.

[0027] High-twist cashmere and wool yarns are laid flat in an ultrasonic cleaner, and a neutral protease cleaning solution (concentration 0.4g / L) is added. The yarns are ultrasonically cleaned for 18 minutes at 37℃ and 110W to remove oil and impurities from the yarn surface. After removal, the yarns are gently rinsed with deionized water and vacuum dried until a small amount of moisture remains. The yarns are then sent to a nitrogen atmosphere low-temperature plasma treatment device and treated for 4 minutes at 90W power and 7cm treatment distance to introduce active sites on the fiber surface without altering the high-twist structure of the yarns.

[0028] The pretreated yarn was immersed in the prepared composite finishing solution at 40℃ and a liquor ratio of 1:32 for 22 minutes. Low-pressure padding (roller pressure 0.15MPa) was used to control the liquid extraction rate at 65%. The padded yarn was then sent to a gradient dryer and pre-dried at 80℃ for 25 minutes, followed by a further increase to 90℃ for 18 minutes. Subsequently, the yarn was transferred to a baking device and baked at 115℃ for 5 minutes to allow the anchoring agent to react with the active sites of the fiber to form a stable cross-linked film. Finally, the yarn was placed in an environment of 65℃ and 60% humidity for 30 minutes to relax and eliminate internal stress, restoring softness and elasticity. This yarn was designated as group A.

[0029] 3. The Influence of Different Processes on High-Twist Cashmere and Wool Yarn 3.1 Optimization of anchoring agent ratio in finishing solution As shown in Table 1, only the ratio of KH-590 to tannic acid was changed, while the other components and processes were the same as those in Group A.

[0030] Table 1 Anchoring agent ratio experiment Note: F4 group yarn is the same as group A yarn. Table 2. Results of performance tests on high-twist cashmere and wool yarns based on anchoring agent formulation. Table 2 shows that a 1:1 mass ratio of KH-590 to tannic acid is optimal. As the tannic acid ratio increases to 1:1, the hydrostatic pressure gradually increases from 4.2 kPa to 4.8 kPa, indicating a continuous improvement in waterproofing performance. When the tannic acid ratio exceeds 1:1, the hydrostatic pressure decreases to 4.3 kPa and 4.0 kPa. Only the tannic acid-based anchoring agent exhibits the lowest hydrostatic pressure at 3.5 kPa. This indicates that the chemical covalent bonds provided by KH-590 and the multiple hydrogen bonds and hydrophobic interactions provided by tannic acid achieve optimal synergistic balance at a 1:1 mass ratio: chemical bonds provide strong backbone anchoring, while physical bonds fill network gaps and enhance interfacial bonding, complementing each other to form a dense anchoring network. When the ratio is unbalanced, a single effect dominates, and the anchoring effect decreases.

[0031] The trend of antifouling performance was basically consistent with that of waterproof performance, reaching its optimal value at a 1:1 ratio, further demonstrating that the anchoring network exhibited the best density and integrity at this ratio. All experimental groups achieved a wrinkle resistance rating of 4.5, consistent with untreated high-twist yarn (4.5). This indicates that changes in the anchoring agent ratio do not affect the original wrinkle resistance of the yarn; the invention effectively protects the wrinkle-resistant structure of the high-twist yarn using mild finishing conditions; the wrinkle resistance is mainly contributed by the yarn's own high-twist structure and the grafting of epichlorohydrin with gum arabic, while the anchoring agent primarily acts on the adhesion of the waterproof and antifouling functional layer.

[0032] 3.2 Effects of different finishing solutions on high-twist cashmere and wool yarns B1: Replace the wool peptide-grafted polysiloxane copolymer in the finishing solution with an equal amount of ordinary polysiloxane. Other components and processes are the same as in Group A.

[0033] B2: Replace the wool peptide-grafted polysiloxane copolymer in the finishing solution with an equal amount of physical mixture of wool peptide and ordinary polysiloxane. Other components and processes are the same as in Group A.

[0034] C1: No multiple anchoring agents (silane coupling agent KH-590 and tannic acid) are added to the finishing solution; other components and processes are the same as in Group A.

[0035] D1: No gum arabic grafted epichlorohydrin (modified plant gum) is added to the finishing solution; other components and processes are the same as in Group A.

[0036] D2: Replace the epichlorohydrin grafted with gum arabic in the finishing solution with an equal amount of unmodified gum arabic. Other components and processes are the same as in Group A.

[0037] E: A traditional C6 fluoride finishing agent is used instead of the composite finishing agent of the present invention, and the other components and processes are the same as those in Group A.

[0038] Table 3. Performance test results of different finishing solutions on high-twist cashmere and wool yarns As shown in Table 3, comparing group A with groups B1 and B2, group A exhibits significantly better hydrostatic pressure (4.8 kPa) and stain resistance (4.5 grade) than groups B1 (3.2 kPa, 3.5 grade) and B2 (3.5 kPa, 3.5 grade). This indicates that ordinary polysiloxane (B1) has poor compatibility with cashmere and wool fibers, resulting in a weak bond between the functional layers and reduced waterproofing and stain resistance. While the physical mixture of wool peptide and polysiloxane (B2) shows some improvement, the graft copolymer (group A) combines the two through chemical bonds, forming a more stable structure and superior waterproofing and stain resistance.

[0039] Comparing group A and group C1, it is evident that group C1 (without anchoring agent) has significantly lower hydrostatic pressure (2.1 kPa) and stain resistance (grade 2.5) than group A (4.8 kPa, grade 4.5). This indicates that without anchoring agent, the functional components adhere to the fiber surface solely through physical adsorption, resulting in insufficient bonding strength and easy detachment after washing. This invention utilizes KH-590 and tannic acid to form a dual anchoring mechanism, significantly improving the adhesion strength of the functional layer.

[0040] Comparing group A with groups D1 and D2, the wrinkle resistance of group D1 (without anti-wrinkle enhancer) (grade 3.5) is significantly lower than that of group A (grade 4.5), indicating that the grafting of epichlorohydrin onto gum arabic plays a key role in synergistically enhancing wrinkle resistance. Although the wrinkle resistance of group D2 (unmodified gum arabic) (grade 4.0) is better than that of group D1, it is still lower than that of group A (grade 4.5), proving that epichlorohydrin grafting modification enables the plant gum to form a moderately cross-linked network, resulting in a better wrinkle-reinforcing effect than unmodified gum. In terms of waterproof and stain-resistant performance, groups D1 and D2 are slightly lower than group A, but the difference is not significant, indicating that this component mainly contributes to the synergistic effect of wrinkle resistance and has little impact on waterproof function.

[0041] Comparing Group A and Group E, it can be seen that the water and stain resistance performance (hydrostatic pressure 4.5 kPa, stain resistance grade 4.5) of Group E (traditional C6 fluoride) is comparable to that of Group A, but its wrinkle resistance performance (grade 3.0) is significantly inferior to that of Group A (grade 4.5). This indicates that although traditional fluoride finishing agents can provide good water and stain resistance, the high-temperature baking process can damage the fibers, resulting in a decrease in the wrinkle resistance and hand feel of the yarn. The composite finishing agent of this invention achieves the same water and stain resistance while better preserving the original wrinkle resistance of high-twist yarn and the natural characteristics of cashmere and wool.

[0042] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, 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 modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A waterproof, stain-resistant, and wrinkle-resistant high-twist cashmere / wool yarn, characterized in that, The high-twist yarn, a blend of cashmere and wool fibers, is obtained by treatment with a composite finishing solution. The composite finishing solution contains wool peptide-grafted polysiloxane copolymer, multiple anchoring agents, gum arabic-grafted epichlorohydrin, wool keratin hydrolysate, polyoxyethylene dehydrated sorbitan monolaurate, polyglycerol-3 diisostearate, and deionized water. The multiple anchoring agents are a mixture of silane coupling agent KH-590 and tannic acid in a mass ratio of (1~4):(1~4).

2. The waterproof, stain-resistant, and wrinkle-resistant high-twist cashmere / wool yarn according to claim 1, characterized in that, The raw materials of the composite finishing solution, by weight, include: 20-30 parts of wool peptide-grafted polysiloxane copolymer, 10-20 parts of multiple anchoring agent, 6-10 parts of gum arabic-grafted epichlorohydrin, 30-40 parts of wool keratin hydrolysate, 1-2 parts of polyoxyethylene dehydrated sorbitan monolaurate, 2-4 parts of polyglycerol-3 diisostearate, and 12-13 parts of deionized water.

3. The waterproof, stain-resistant, and wrinkle-resistant high-twist cashmere / wool yarn according to claim 1, characterized in that, The preparation method of the composite finishing solution includes the following steps: adding wool keratin hydrolysate and deionized water to a reaction vessel and stirring until completely dissolved; adding wool peptide-grafted polysiloxane copolymer and gum arabic-grafted epichlorohydrin to the resulting solution, heating and stirring to form a uniform emulsion; cooling and adding KH-590 and tannic acid to the emulsion and stirring; then adding polyoxyethylene dehydrated sorbitan monolaurate and polyglycerol-3 diisostearate in sequence and stirring, ultrasonically dispersing, adjusting the pH, and allowing to stand to defoam, thereby obtaining the composite finishing solution.

4. The waterproof, stain-resistant, and wrinkle-resistant high-twist cashmere / wool yarn according to claim 3, characterized in that, The wool keratin hydrolysate was stirred with deionized water at 35-45℃ for 20-30 min until dissolved; wool peptide-grafted polysiloxane copolymer and gum arabic-grafted epichlorohydrin were added and stirred at 45-55℃ for 55-65 min to form a uniform emulsion; the temperature was lowered to 32-38℃ and stirred for 25-35 min; stirring was continued for 25-35 min, ultrasonic dispersion was performed for 13-17 min, and the pH was adjusted to 6.5-7.

0.

5. The waterproof, stain-resistant, and wrinkle-resistant high-twist cashmere / wool yarn according to claim 1, characterized in that, The preparation method of the wool peptide-grafted polysiloxane copolymer includes the following steps: dissolving wool peptide in ethanol and adding an antioxidant to obtain a wool peptide ethanol solution; dispersing γ-glycidoxypropyltrimethoxysilane in ethanol and adding deionized water dropwise for hydrolysis to obtain a silane hydrolysate; adding the wool peptide ethanol solution dropwise to the silane hydrolysate, adjusting the pH with triethylamine, and adding dibutyltin dilaurate to catalyze the reaction; after the reaction is completed, the copolymer is successively diluted, centrifuged, distilled under reduced pressure, and pulverized to obtain the wool peptide-grafted polysiloxane copolymer.

6. The waterproof, stain-resistant, and wrinkle-resistant high-twist cashmere / wool yarn according to claim 5, characterized in that, When preparing wool peptide-grafted polysiloxane copolymer, the temperature for dissolving wool peptide is 35~40℃; the temperature for hydrolyzing γ-glycidoxypropyltrimethoxysilane is 40~45℃, and the stirring time is 30~60min; during the catalytic reaction, the pH is adjusted to 7.0~7.5, the reaction temperature is 60~70℃, and the reaction time is 2.5~4h.

7. The waterproof, stain-resistant, and wrinkle-resistant high-twist cashmere / wool yarn according to claim 1, characterized in that, The preparation method of gum arabic grafted epichlorohydrin includes the following steps: dissolving gum arabic in deionized water, heating to dissolve and then adding sodium hydroxide for activation; adding epichlorohydrin dropwise to carry out the grafting reaction; after the reaction is completed, adjusting the pH with glacial acetic acid, and then centrifuging, washing, vacuum drying and pulverizing to obtain gum arabic grafted epichlorohydrin.

8. The waterproof, stain-resistant, and wrinkle-resistant high-twist cashmere / wool yarn according to claim 7, characterized in that, When preparing gum arabic grafted epichlorohydrin, the dissolution temperature is 55~60℃, the activation pH is 10.0~10.5, and the activation time is 25~35min; the grafting reaction temperature is 40~50℃, the final viscosity is 30~35mPa·s, and the final product pH is 6.5~7.

0.

9. A method for preparing a waterproof, stain-resistant, and wrinkle-resistant high-twist cashmere / wool yarn as described in any one of claims 1-8, characterized in that, Includes the following steps: Cashmere and wool fibers are mixed and spun into high-twist cashmere and wool yarn through carding, drawing, roving, and spinning processes. The resulting high-twist cashmere and wool yarn is then ultrasonically cleaned, vacuum dried, and then subjected to low-temperature plasma treatment to introduce active sites on the fiber surface. The pretreated yarn is immersed in the prepared composite finishing solution, and then subjected to padding, gradient drying, baking curing, and relaxation treatment to obtain waterproof, stain-resistant, and wrinkle-resistant high-twist cashmere wool yarn.

10. The preparation method according to claim 9, characterized in that, The ultrasonic cleaning temperature is 35~40℃, the ultrasonic power is 105~115W, and the processing time is 16~20min; the low-temperature plasma treatment power is 80~100W, the treatment distance is 6~8cm, and the processing time is 3~5min; the padding temperature is 35~45℃, the immersion time is 20~24min, and the roll pressure is 0.13~0.17MPa; the gradient drying involves first pre-drying at 80~85℃ for 20~30min, and then raising the temperature to 85~95℃ for 15~20min; the baking curing temperature is 110~120℃, and the time is 4~6min; the relaxation treatment temperature is 60~70℃, and the processing time is 25~30min.

Images