Antistatic wear-resistant skin-friendly fluttering soft yarn and preparation process thereof

Abstract

The invention discloses an antistatic wear-resistant skin-friendly fluttering soft yarn and a preparation process thereof, and relates to the technical field of textile materials, the preparation process of the wear-resistant skin-friendly fluttering soft yarn comprises the following steps: S1, pretreating cotton fibers and bamboo fibers; s2, preparing a functional additive and carrying out primary blending; s3, performing surface grafting on the nano-zinc oxide antistatic particles and preparing composite antistatic particles by adopting a sol-gel method; s4, mixing and carding are conducted again on the basis of preliminary blending; s5, spraying a moisture absorbent to the surface of the fiber bundle during oscillation twisting, setting a pulsed magnetic field, and adjusting the frequency and amplitude according to different stages in the twisting process, so that the fiber bundle oscillates in the horizontal and vertical directions; s6, the formed yarn is soaked in treating fluid; and S7, carrying out dipping treatment on the yarns by using the finishing liquid. By preparing and adding the composite antistatic particles, the problems of dust collection contamination, equipment winding, influence on textile processing efficiency and unstable finished product quality caused by static electricity of traditional yarns can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of textile materials, and particularly to an antistatic, wear-resistant and skin-friendly floating soft yarn and a preparation process thereof. Background Art

[0002] Traditional yarns are limited by simple preparation processes and conventional material applications, and cannot effectively solve the problem of static electricity. During actual production and use, traditional yarns are extremely prone to dust absorption and contamination due to static electricity, which not only affects the appearance cleanliness, but also affects the internal quality of the yarn due to dust and impurities. The yarn of the present application can solve the problems of dust absorption and contamination, winding of equipment, affecting textile processing efficiency, and unstable finished product quality caused by static electricity in traditional yarns.

[0003] The defects of existing yarns are as follows: 1. Patent document CN106012083B discloses a preparation method of an environment-friendly skin-friendly polyester organza fabric. This document mainly considers how to improve the wearing comfort of polyester fibers, overcome the problems of poor hygroscopicity, non-sweating of the fabric, stuffy feeling when wearing, poor antistatic ability, and easy dust contamination, and does not consider how to solve the problems of dust absorption and contamination, winding of equipment, affecting textile processing efficiency, and unstable finished product quality caused by static electricity in traditional yarns; 2. Patent document CN112251864B discloses a wear-resistant improved viscose composite yarn and a preparation method thereof. This document mainly considers how to improve the wear resistance, breaking strength and elasticity of viscose fibers, improve the dimensional stability of viscose fiber products, and relieve the wrinkling degree of viscose fiber products, and does not consider how to solve the problems that traditional fiber pretreatment cannot effectively improve the fiber bonding performance, resulting in insufficient yarn strength, easy breakage, large fiber loss and high production cost; 3. Patent document CN110499561B discloses a production method of long-fiber high-elastic wear-resistant cotton yarn. This document mainly considers the problems that current cotton yarns still have defects in elasticity, wear resistance, antibacterial property, air permeability and dyeability during use, and does not consider how to solve the problems of easy wear, short service life, rough hand feeling and poor wearing experience of traditional yarns during use; 4. Patent document CN106048800B discloses a flame-retardant antistatic blended yarn and a production method thereof. This document mainly considers how to provide a flame-retardant antistatic blended yarn and a production method thereof with good antistatic effect, long-lasting function, good wearing performance and low production cost, and does not consider how to solve the problem that traditional yarns have a single function and cannot meet the diverse performance requirements of medical, sanitary, sportswear or high-end home textiles for yarns. Summary of the Invention

[0004] The purpose of the present invention is to provide an antistatic, wear-resistant and skin-friendly floating soft yarn and its preparation process to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A preparation process of an antistatic, wear-resistant and skin-friendly floating soft yarn. The preparation process of the wear-resistant and skin-friendly floating soft yarn includes: S1. Place cotton fibers and bamboo fibers in a plasma device with a vacuum degree of 10 - 20 Pa for pretreatment. After the treatment is completed, circulate hot air to dry the fibers. S2. Make a functional auxiliary agent from a bio-based lubricant extracted from Jatropha curcas oil and a nano-titanium dioxide toughening agent. Conduct preliminary blending of 50% cotton fibers and all bamboo fibers, and add the functional auxiliary agent after carding and pre-opening. S3. Surface grafting of nano-zinc oxide antistatic particles and preparation of composite antistatic particles by sol-gel method. S4. On the basis of preliminary blending, add the remaining 50% cotton fibers, 0.5% - 1% of the composite antistatic particles in the mixed system, and 0.05% - 0.1% of the anti-tangling agent based on the total amount of fibers, and mix and card again. S5. Sprinkle nano-silica aerogel moisture absorbent on the surface of the fiber bundle during oscillating twisting. Set a pulsed magnetic field, and adjust the frequency and amplitude according to different stages during the twisting process to make the fiber bundle oscillate in the horizontal and vertical directions. S6. Immerse the formed yarn in the treatment liquid, react at a temperature of 50 - 60 °C for 2.5 - 3 hours, then wash, dry with water and infrared-assisted drying. S7. Impregnate the yarn with the finishing liquid at 85 °C for 35 minutes. During impregnation, use periodic pulsed stretching and remove the excess finishing liquid.

[0006] Preferably, in S3, it further includes: S31. Disperse nano-zinc oxide particles in the organic solvent dimethyl sulfoxide, and adopt a combination of ultrasonic dispersion and high-speed stirring. First, perform ultrasonic treatment for 15 minutes, with an ultrasonic power of 300 - 400 W, and then use a magnetic stirrer to stir for 30 minutes, with a stirring speed of 600 - 800 revolutions per minute. S32. Add 3-sulfopropyl acid which is 1.2 times the mass of the nano-zinc oxide particles as a monomer containing a sulfonic acid group, add the initiator azobisisobutyronitrile, and the dosage of azobisisobutyronitrile is 1% - 2% of the mass of 3-sulfopropyl acid. Place the reaction system in a constant temperature water bath at 50 - 60 °C, react for 2 - 3 hours, and use a magnetic stirrer to stir, with a stirring speed of 300 - 500 revolutions per minute.

[0007] Preferably, in S3, it further includes: S33: Dissolve zinc acetate and tetrabutyl titanate in 150 mL of ethanol solvent according to a molar ratio of 3:2, and the total concentration of zinc acetate and tetrabutyl titanate is 0.5 - 1 mol / L. Add deionized water accounting for 10% - 20% of the volume of the ethanol solvent dropwise to the solution at a dropping rate of 1.2 - 1.8 mL / min, and add glacial acetic acid as a catalyst to adjust the pH value of the solution to 3.2 - 3.8; S34: Place the solution in an oil bath at 60 - 80 °C for hydrolysis and polycondensation reactions. The stirring speed is 200 - 300 revolutions per minute, and the reaction time is 4 - 6 hours; S35: Separate the composite particles from the sol by centrifugation at a centrifugation speed of 5000 - 8000 revolutions per minute for 10 - 20 minutes, and wash them repeatedly with deionized water and ethanol to remove unreacted impurities and by-products. Dry them in a vacuum oven at 60 - 80 °C for 12 - 24 hours to obtain the composite antistatic particles.

[0008] Preferably, in S1, it further includes: S11: Set the initial treatment power of the plasma equipment to 60 W. After treating for 2 minutes, gradually increase it to 90 W at a rate of 6 W / min, and adjust the total treatment time to 5 minutes; The intake rate of the plasma equipment is 0.2 - 0.6 L / min; The magnetic field modulation of the plasma equipment adopts a square wave modulation method, and the magnetic field intensity periodically changes according to the square wave law between 0.02 T and 0.06 T. The square wave period is 8 s, the high level duration is 3 s, and the low level duration is 5 s; S12: Maintain the pressure in the drying equipment at a vacuum environment of 50 - 100 Pa, the hot air circulation rate is 0.5 - 1 m / s, the drying temperature is set at 70 - 90 °C, and a gradient heating mode is adopted. Heat up from room temperature to 70 °C at a rate of 10 °C / min in the first 2 minutes, and then maintain it within the range of 70 - 90 °C for 3 - 5 minutes.

[0009] Preferably, in S2, it further includes: S21: When the fiber linear density is 1.5 - 2.0 dtex, the length is 30 - 35 mm, and the card clothing density is 230 teeth per square inch, add functional additives; The bio - based lubricant is extracted by supercritical fluid extraction technology, with a purity greater than 95%, and the bio - based lubricant accounts for 60% - 70% of the total amount of additives; The average particle size of the nano - titanium dioxide toughening agent is 50 - 80 nm, and the nano - toughening agent accounts for 30% - 40% of the total amount of additives.

[0010] Preferably, in S4, it further includes: S41: At the initial stage of the blending process, the rotational speed is set to 50 - 60 r / min. After 10 - 15 minutes, the rotational speed is increased to 80 - 100 r / min. In the later stage of mixing, the rotational speed is decreased to 60 - 70 r / min S42: During the carding process, the initial carding angle is set to 30°. The carding angle is increased by 2° every 5 minutes until it reaches 40°.

[0011] Preferably, in S5, it further includes: S51: The moisture absorbent is sprayed with a controlled amount through a micro-injection pump. The addition amount of the moisture absorbent is 0.01% - 0.05% of the fiber weight and is evenly sprayed at a speed of 0.005 mL / min; S52: The magnetic field intensity of the pulsed magnetic field varies periodically between 0.02 - 0.08 T. The pulse period is set to 2 s. Within each period, the magnetic field intensity remains at 0.02 T for 0.5 s, then rises to 0.08 T within 0.5 s, and then drops to 0.02 T within 1 s; S53: Within the initial 5 minutes of twisting, the frequency linearly increases from 50 Hz to 80 Hz, and the amplitude increases from 0.1 mm to 0.2 mm. In the next 10 minutes, the frequency remains stable at 80 Hz, and the amplitude increases to 0.25 mm. In the later 5 minutes of twisting, the frequency drops to 60 Hz, and the amplitude drops back to 0.15 mm; The oscillation frequency in the horizontal direction is set to 50 - 80 Hz, and the oscillation frequency in the vertical direction is 60 - 90 Hz. The amplitudes in both directions are controlled between 0.1 - 0.2 mm.

[0012] Preferably, in S6, it further includes: S61: The treatment liquid includes 3.5% - 4.5% of a polycaprolactone-based biodegradable polyester organic crosslinking agent, 0.6% - 0.9% of a zinc-copper bimetallic complex, and 0.1% - 0.3% of a fatty alcohol polyoxyethylene ether. The treatment liquid is ultrasonically stirred with an ultrasonic power of 200 - 300 W, an ultrasonic frequency of 30 kHz, and an ultrasonic time of 20 - 25 minutes; S62: The infrared power for infrared-assisted drying is 500 - 800 W.

[0013] Preferably, in S7, it further includes: S71: The finishing liquid includes 6% - 7% of an organosilicon softening agent, 4% - 4.5% of a nano-titanium dioxide wear-resistant enhancer, 0.7% - 0.9% of a silver ion antibacterial agent, and 2.5% of an antistatic agent; S72: The draw ratio is 7% - 9%. Drawing is performed once every 30 seconds, and the drawing duration is 5 seconds. After the impregnation treatment, a centrifugal device is used to remove the excess finishing liquid from the yarn, and the centrifugal speed is 1200 - 1400 rpm.

[0014] Preferably, an antistatic wear-resistant skin-friendly floating soft yarn is prepared according to the preparation process of an antistatic wear-resistant skin-friendly floating soft yarn.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. By preparing and adding composite antistatic particles, the present invention first disperses nano-zinc oxide particles in the organic solvent dimethyl sulfoxide, then conducts a surface grafting reaction, and at the same time uses the sol-gel method to prepare composite particles, so that the composite antistatic particles can be more uniformly and stably dispersed in the yarn system. Compared with the prior art, the composite antistatic particles can not only effectively reduce the surface resistance of the yarn, but also maintain a low-resistance state for a long time. They can continuously and effectively release and conduct charges within a wide range of temperature and humidity, significantly improving the antistatic ability of the yarn in different environments. When adding the composite antistatic particles, controlling their proportion in the mixed system to be 0.5%-1% can achieve good antistatic performance without having an adverse impact on other physical properties of the yarn. Therefore, it can solve the problems of dust absorption and contamination caused by static electricity in traditional yarns, winding of equipment, affecting textile processing efficiency, and unstable quality of finished products.

[0016] 2. By pretreating cotton fibers and bamboo fibers in a plasma device with a vacuum degree of 10-20 Pa, and controlling parameters such as the initial treatment power, treatment time, air intake rate, and magnetic field modulation method, the surface of the fibers is micro-modified. After treatment, more active groups are formed on the fiber surface. Then, combined with a specific circulating hot air drying process, maintaining a vacuum environment of 50-100 Pa in the drying equipment and adopting a gradient heating mode to further stabilize the fiber structure. Compared with the simple fiber pretreatment methods in the prior art, the method of the present invention can greatly improve the activity and stability of the fibers, making the combination of the fibers with other materials in subsequent processing closer, effectively avoiding the decrease in strength caused by insufficient combination, reducing the damage of the fibers during processing, improving the utilization rate of the fibers and the quality of the final product. Therefore, it can solve the problems that traditional fiber pretreatment cannot effectively improve the fiber combination performance, resulting in insufficient strength and easy breakage of the yarn, large fiber loss, and high production cost.

[0017] 3. The present invention extracts a bio-based lubricant with a purity greater than 95% from Jatropha curcas oil by using supercritical fluid extraction technology, and makes a functional additive with a nano-titanium dioxide toughening agent with an average particle size of 50 - 80 nm. Under specific conditions where the fiber linear density is 1.5 - 2.0 dtex, the length is 30 - 35 mm, and the card clothing density is 230 teeth per square inch, the bio-based lubricant can form a uniform lubricating film on the fiber surface, reducing the friction coefficient between fibers and reducing wear. The nano-titanium dioxide toughening agent can effectively fill the microscopic defects inside the fibers, enhancing the toughness of the fibers. Compared with the methods in the prior art for improving wear resistance and hand feeling, the functional additive of the present invention is not only green and environmentally friendly, but also can fundamentally improve the physical properties of the fibers, enabling the yarn to maintain good wear resistance during long-term use, while the hand feeling is softer and more comfortable, greatly improving the market competitiveness of the product. Therefore, it can solve the problems of easy wear, short lifespan, rough hand feeling, and poor wearing experience of traditional yarns in use.

[0018] 4. The present invention formulates a treatment liquid and a finishing liquid during the yarn treatment process. The polycaprolactone-based biodegradable polyester organic crosslinking agent in the treatment liquid can form a three-dimensional network structure inside the yarn, enhancing the strength and stability of the yarn. The zinc-copper bimetallic complex has antibacterial and antioxidant properties, and the fatty alcohol polyoxyethylene ether plays a good emulsifying and dispersing role. The silicone softener in the finishing liquid gives the yarn a soft hand feeling, and the nano-titanium dioxide wear-resistant enhancer further improves wear resistance. The silver ion antibacterial agent effectively inhibits the growth of bacteria, and the antistatic agent assists in enhancing the antistatic performance. Combined with a periodic pulsed stretching treatment method, the finishing liquid can penetrate more fully into the yarn interior. Compared with the prior art yarn treatment methods with single functions, the present invention can comprehensively improve the comprehensive properties of the yarn such as antibacterial, soft, and wear-resistant, enabling it to meet the usage requirements of more fields and more scenarios, greatly expanding the application range of the yarn. Therefore, it can solve the problem that traditional yarns have single functions and cannot meet the diverse performance requirements of medical, sanitary, sportswear, or high-end home textiles. Detailed implementation manners

[0019] The technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. Embodiment

[0020] A preparation process for an antistatic, wear-resistant, and skin-friendly soft and smooth yarn. The preparation process for the wear-resistant, skin-friendly soft and smooth yarn includes: S1. Place cotton fibers and bamboo fibers in a plasma device with a vacuum degree of 15 Pa for pretreatment. The initial processing power of the plasma device is set to 60 W. After 2 minutes of processing, it is gradually increased to 90 W at a rate of 6 W / min. The total processing time is 5 minutes, the air intake rate is 0.4 L / min, and the magnetic field modulation adopts a square wave modulation method. The magnetic field strength periodically changes according to the square wave law between 0.04 T. The square wave period is 8 s, the high-level duration is 3 s, and the low-level duration is 5 s.

[0021] After the processing is completed, maintain the pressure in the drying device at a vacuum environment of 80 Pa. The hot air circulation rate is 0.8 m / s, the drying temperature is set to 80 °C, and a gradient heating mode is adopted. In the first 2 minutes, it is heated from room temperature to 70 °C at a rate of 10 °C / min, and then it is kept at 70 - 90 °C for 4 minutes for circulating hot air drying.

[0022] S2. Extract a bio-based lubricant with a purity of 96% from Jatropha curcas oil through supercritical fluid extraction technology. This bio-based lubricant accounts for 65% of the total amount of additives. Make a nano-titanium dioxide toughening agent with an average particle size of 65 nm into a functional additive, and the nano-toughening agent accounts for 35% of the total amount of additives. Conduct a preliminary blending of 50% cotton fibers and all bamboo fibers. The fiber linear density is 1.8 dtex, the length is 32 mm, the card clothing density is 230 teeth per square inch, and the functional additive is added after carding and pre-opening.

[0023] Disperse nano-zinc oxide particles in the organic solvent dimethyl sulfoxide. First, perform ultrasonic treatment for 15 minutes with an ultrasonic power of 350 W, and then use a magnetic stirrer to stir for 30 minutes with a stirring speed of 700 revolutions per minute; Add 3-sulfopropyl acid, which is 1.2 times the mass of the nano-zinc oxide particles, as a monomer containing a sulfonic acid group, and add an initiator azobisisobutyronitrile. The dosage of azobisisobutyronitrile is 1.5% of the mass of 3-sulfopropyl acid. Place the reaction system in a constant temperature water bath at 55 °C and react for 2.5 hours, using a magnetic stirrer to stir with a stirring speed of 400 revolutions per minute; Dissolve zinc acetate and tetrabutyl titanate in a 150 mL ethanol solvent according to a molar ratio of 3:2, and the total concentration of zinc acetate and tetrabutyl titanate is 0.8 mol / L. Add deionized water, which is 15% of the volume of the ethanol solvent, to the solution dropwise at a dropping speed of 1.5 mL / min, and add glacial acetic acid as a catalyst to adjust the pH value of the solution to 3.5; Place the solution in an oil bath at 70 °C for hydrolysis and polycondensation reactions. The stirring speed is 250 revolutions per minute, and the reaction time is 5 hours; The composite particles were separated from the sol by centrifugation at a speed of 6500 revolutions per minute for 15 minutes, and then washed repeatedly with deionized water and ethanol to remove unreacted impurities and by-products. They were dried in a vacuum oven at 70 °C for 18 hours to obtain the composite antistatic particles.

[0024] S4. On the basis of preliminary blending, add the remaining 50% cotton fibers, 0.8% composite antistatic particles of the mixed system, and 0.08% anti-tangling agent of the total fiber amount. At the initial stage of the blending process, the rotation speed is set at 55 r / min, and after 12 minutes, the rotation speed is increased to 90 r / min. In the later stage of mixing, the rotation speed is reduced to 65 r / min. During the carding process, set the initial carding angle at 30°, and increase the carding angle by 2° every 5 minutes until it reaches 40°, and then carry out mixing and carding again.

[0025] S5. When oscillating and twisting, control the spraying amount of the nano-scale silica aerogel hygroscopic agent through a micro-injection pump. The addition amount of the hygroscopic agent is 0.03% of the fiber weight, and it is evenly sprayed at a speed of 0.005 mL / min. Set a pulsed magnetic field, and the magnetic field intensity changes periodically between 0.05 T. Set the pulse period at 2 s. Within each period, the magnetic field intensity remains at 0.02 T for 0.5 s, then rises to 0.08 T within 0.5 s, and then drops to 0.02 T within 1 s. During the twisting process, within the initial 5 minutes of twisting, the frequency linearly increases from 50 Hz to 80 Hz, and the amplitude increases from 0.1 mm to 0.2 mm. In the next 10 minutes, the frequency remains stable at 80 Hz, and the amplitude increases to 0.25 mm. In the last 5 minutes of the twisting process, the frequency drops to 60 Hz, and the amplitude drops back to 0.15 mm. The oscillation frequency in the horizontal direction is set at 65 Hz, and the oscillation frequency in the vertical direction is 75 Hz. The amplitudes in both directions are controlled at 0.15 mm.

[0026] S6. Immerse the formed yarn in the treatment liquid. The treatment liquid contains 4% polycaprolactone-based biodegradable polyester organic cross-linking agent, 0.75% zinc-copper bimetallic complex, and 0.2% fatty alcohol polyoxyethylene ether. Carry out ultrasonic stirring on the treatment liquid, with an ultrasonic power of 250 W, an ultrasonic frequency of 30 kHz, and an ultrasonic time of 22 minutes. React at a temperature of 55 °C for 2.8 hours, and then wash, dry, and carry out infrared-assisted drying. The infrared power of the infrared-assisted drying is 650 W.

[0027] S7. Immerse the yarn in the finishing solution at 85 °C for 35 minutes. The finishing solution contains 6.5% silicone softener, 4.2% nano-titanium dioxide wear-resistant enhancer, 0.8% silver ion antibacterial agent, and 2.5% antistatic agent. During impregnation, periodic pulse stretching is adopted, with a stretching rate of 8%. Stretching is carried out once every 30 seconds, and the stretching duration is 5 seconds. Then, use a centrifugal device to remove the excess finishing solution from the yarn, with a centrifugal speed of 1300 rpm. Example

[0028] A preparation process of an antistatic, wear-resistant and skin-friendly floating soft yarn. The preparation process of the wear-resistant and skin-friendly floating soft yarn includes: S1. Place cotton fibers and bamboo fibers in a plasma device with a vacuum degree of 18 Pa for pretreatment. The initial treatment power of the plasma device is set to 60 W. After 2 minutes of treatment, it is gradually increased to 90 W at a rate of 6 W / min, with a total treatment time of 5 minutes. The air intake rate is 0.6 L / min. The magnetic field modulation adopts a square wave modulation method, and the magnetic field intensity changes periodically according to the square wave law between 0.06 T. The square wave period is 8 s, the high-level duration is 3 s, and the low-level duration is 5 s.

[0029] After the treatment is completed, maintain the pressure in the drying device at a vacuum environment of 100 Pa, with a hot air circulation rate of 1 m / s. The drying temperature is set to 90 °C, and a gradient heating mode is adopted. In the first 2 minutes, it is heated from room temperature to 70 °C at a rate of 10 °C / min, and then it is kept at 70 - 90 °C for 5 minutes for circulating hot air drying.

[0030] S2. Extract a bio-based lubricant with a purity of 97% from Jatropha curcas oil through supercritical fluid extraction technology. The bio-based lubricant accounts for 70% of the total amount of additives. Make a nano-titanium dioxide toughening agent with an average particle size of 80 nm into a functional additive, and the nano-toughening agent accounts for 30% of the total amount of additives. Conduct preliminary blending on 50% of the cotton fibers and all the bamboo fibers, with a fiber linear density of 2.0 dtex, a length of 35 mm, and a carding density of 230 teeth per square inch. After carding and pre-opening, add the functional additive.

[0031] S3. Disperse nano-zinc oxide particles in the organic solvent dimethyl sulfoxide. First, perform ultrasonic treatment for 15 minutes with an ultrasonic power of 400 W, and then use a magnetic stirrer to stir for 30 minutes at a stirring speed of 800 revolutions per minute; Add 3-sulfopropyl acid, which is 1.2 times the mass of the nano-zinc oxide particles, as a monomer containing a sulfonic acid group, and add an initiator azobisisobutyronitrile. The dosage of azobisisobutyronitrile is 2% of the mass of 3-sulfopropyl acid. Place the reaction system in a constant temperature water bath at 60 °C and react for 3 hours, using a magnetic stirrer to stir at a stirring speed of 500 revolutions per minute; Zinc acetate and tetrabutyl titanate were dissolved in 150 mL of ethanol solvent at a molar ratio of 3:2, and the total concentration of zinc acetate and tetrabutyl titanate was 1 mol / L. Deionized water with a volume of 20% of the volume of the alcohol solvent was added dropwise to the solution at a dropping rate of 1.8 mL / min, and glacial acetic acid was added as a catalyst to adjust the pH value of the solution to 3.8; The solution was placed in an oil bath at 80 °C for hydrolysis and polycondensation reactions. The stirring speed was 300 revolutions per minute, and the reaction time was 6 hours; The composite particles were separated from the sol by centrifugation at a speed of 8000 revolutions per minute for 20 minutes, and were washed repeatedly with deionized water and ethanol to remove unreacted impurities and by-products, and then dried in a vacuum oven at 80 °C for 24 hours to obtain composite antistatic particles.

[0032] S4. On the basis of preliminary blending, the remaining 50% of cotton fibers, 1% of composite antistatic particles in the mixed system, and 0.1% of anti-tangling agent based on the total amount of fibers were added. At the initial stage of the blending process, the rotation speed was set at 60 r / min, and after 15 minutes, the rotation speed was increased to 100 r / min. In the later stage of mixing, the rotation speed was reduced to 70 r / min; During the carding process, the initial carding angle was set at 30°, and the carding angle was increased by 2° every 5 minutes until it reached 40°, and then mixing and carding were carried out again.

[0033] S5. During oscillatory twisting, the spraying amount of the nanoscale silica aerogel moisture absorbent was controlled by a micro-injection pump. The addition amount of the moisture absorbent was 0.05% of the fiber weight, and it was evenly sprayed at a speed of 0.005 mL / min. A pulsed magnetic field was set, and the magnetic field intensity changed periodically between 0.02 T and 0.08 T. The pulse period was set at 2 s. In each period, the magnetic field intensity remained at 0.02 T for 0.5 s, then rose to 0.08 T within 0.5 s, and then dropped to 0.02 T within 1 s. During the twisting process, within the initial 5 minutes of twisting, the frequency was linearly increased from 50 Hz to 80 Hz, and the amplitude was increased from 0.1 mm to 0.2 mm. In the next 10 minutes, the frequency remained stable at 80 Hz, and the amplitude increased to 0.25 mm. In the last 5 minutes of the twisting process, the frequency was reduced to 60 Hz, and the amplitude dropped back to 0.15 mm; The oscillatory frequency in the horizontal direction was set at 80 Hz, and the oscillatory frequency in the vertical direction was 90 Hz. The amplitudes in both directions were controlled at 0.2 mm.

[0034] S6. Immerse the formed yarn in a treatment liquid containing 4.5% of a polycaprolactone-based biodegradable polyester organic crosslinking agent, 0.9% of a zinc-copper bimetallic complex, and 0.3% of a fatty alcohol polyoxyethylene ether. Stir the treatment liquid ultrasonically with an ultrasonic power of 300 W, an ultrasonic frequency of 30 kHz, and an ultrasonic time of 25 minutes. React at a temperature of 60 °C for 3 hours, then wash, dry, and perform infrared-assisted drying with an infrared power of 800 W.

[0035] S7. Impregnate the yarn with a finishing liquid at 85 °C for 35 minutes. The finishing liquid contains 7% of an organosilicon softening agent, 4.5% of a nano-titanium dioxide wear-resistant enhancer, 0.9% of a silver ion antibacterial agent, and 2.5% of an antistatic agent. During impregnation, perform periodic pulsed stretching with a stretching rate of 9%, stretch once every 30 seconds, with a stretching duration of 5 seconds, and use a centrifugal device to remove the excess finishing liquid from the yarn at a centrifugal speed of 1400 rpm. Example

[0036] A preparation process for an antistatic, wear-resistant, and skin-friendly floating soft yarn. The preparation process for the wear-resistant, skin-friendly floating soft yarn includes: S1. Place cotton fibers and bamboo fibers in a plasma device with a vacuum degree of 10 Pa for pretreatment. Set the initial treatment power of the plasma device to 60 W. After 2 minutes of treatment, gradually increase it to 90 W at a rate of 6 W / min, with a total treatment time of 5 minutes, an air intake rate of 0.2 L / min, and use a square wave modulation method for magnetic field modulation. The magnetic field intensity changes periodically according to the square wave law between 0.02 T, with a square wave period of 8 s, a high-level duration of 3 s, and a low-level duration of 5 s.

[0037] After the treatment is completed, maintain the pressure in the drying device at a vacuum environment of 50 Pa, with a hot air circulation rate of 0.5 m / s, set the drying temperature to 70 °C, and use a gradient heating mode. In the first 2 minutes, heat from room temperature to 70 °C at a rate of 10 °C / min, and then maintain it within the range of 70 - 90 °C for 3 minutes for circulating hot air drying.

[0038] S2. Extract a bio-based lubricant with a purity of 95% from Jatropha curcas oil through supercritical fluid extraction technology. The bio-based lubricant accounts for 60% of the total amount of additives. Prepare a functional additive from a nano-titanium dioxide toughening agent with an average particle size of 50 nm, and the nano-toughening agent accounts for 40% of the total amount of additives. Conduct preliminary blending of 50% of the cotton fibers and all the bamboo fibers, with a fiber linear density of 1.5 dtex, a length of 30 mm, and a carding density of 230 teeth per square inch, and add the functional additive after carding and pre-opening and loosening.

[0039] S3. Disperse the nano-zinc oxide particles in the organic solvent dimethyl sulfoxide, first ultrasonically treat for 15 minutes with an ultrasonic power of 300 W, and then stir with a magnetic stirrer for 30 minutes at a stirring speed of 600 revolutions per minute; Add 3-sulfopropyl propionate, which is 1.2 times the mass of the nano-zinc oxide particles, as the monomer containing sulfonic acid group, and add the initiator azobisisobutyronitrile. The dosage of azobisisobutyronitrile is 1% of the mass of 3-sulfopropyl propionate. Place the reaction system in a constant temperature water bath at 50 °C and react for 2 hours, stirring with a magnetic stirrer at a stirring speed of 300 revolutions per minute; Dissolve zinc acetate and tetrabutyl titanate in a 150 mL ethanol solvent according to a molar ratio of 3:2, and the total concentration of zinc acetate and tetrabutyl titanate is 0.5 mol / L. Add deionized water, which is 10% of the volume of the ethanol solvent, dropwise to the solution at a dropping speed of 1.2 mL / min, and add glacial acetic acid as a catalyst to adjust the pH value of the solution to 3.2; Place the solution in an oil bath at 60 °C for hydrolysis and polycondensation reaction, with a stirring speed of 200 revolutions per minute and a reaction time of 4 hours; Separate the composite particles from the sol by centrifugation at a centrifugation speed of 5000 revolutions per minute for 10 minutes, and wash them repeatedly with deionized water and ethanol to remove unreacted impurities and by-products. Dry them in a vacuum oven at 60 °C for 12 hours to obtain the composite antistatic particles.

[0040] S4. On the basis of preliminary blending, add the remaining 50% cotton fibers, 0.5% of the composite antistatic particles in the mixed system, and 0.05% of the anti-tangling agent based on the total amount of fibers. At the initial stage of the blending process, set the rotation speed to 50 r / min, increase the rotation speed to 80 r / min after 10 minutes, and reduce the rotation speed to 60 r / min in the later stage of mixing; During the carding process, set the initial carding angle to 30°, increase the carding angle by 2° every 5 minutes until it reaches 40°, and then perform mixing and carding again.

[0041] S5. During oscillatory twisting, the spraying amount of nano-scale silica aerogel desiccant is controlled by a micro-injection pump. The addition amount of the desiccant is 0.01% of the fiber weight and is evenly sprayed at a speed of 0.005 mL / min. A pulsed magnetic field is set, and the magnetic field strength varies periodically between 0.02 T. The pulse period is set to 2 s. Within each period, the magnetic field strength remains at 0.02 T for 0.5 s, then rises to 0.08 T within 0.5 s, and then drops to 0.02 T within 1 s. During the twisting process, within the initial 5 minutes of twisting, the frequency linearly increases from 50 Hz to 80 Hz, and the amplitude increases from 0.1 mm to 0.2 mm. In the next 10 minutes, the frequency remains stable at 80 Hz, and the amplitude increases to 0.25 mm. In the last 5 minutes of the later stage of twisting, the frequency drops to 60 Hz, and the amplitude drops back to 0.15 mm; The oscillation frequency in the horizontal direction is set to 50 Hz, and the oscillation frequency in the vertical direction is 60 Hz. The amplitudes in both directions are controlled within 0.1 mm.

[0042] S6. The formed yarn is soaked in the treatment liquid. The treatment liquid contains 3.5% of a polycaprolactone-based biodegradable polyester organic cross-linking agent, 0.6% of a zinc-copper bimetallic complex, and 0.1% of a fatty alcohol polyoxyethylene ether. The treatment liquid is ultrasonically stirred. The ultrasonic power is 200 W, the ultrasonic frequency is 30 kHz, and the ultrasonic time is 20 minutes. The reaction is carried out at a temperature of 50 °C for 2.5 hours, and then it is washed, dried, and infrared-assisted dried. The infrared power for infrared-assisted drying is 500 W.

[0043] S7. The yarn is impregnated with the finishing liquid at 85 °C for 35 minutes. The finishing liquid contains 6% of an organosilicon softening agent, 4% of a nano-titanium dioxide wear-resistant enhancer, 0.7% of a silver ion antibacterial agent, and 2.5% of an antistatic agent. During impregnation, periodic pulsed stretching is adopted, and the stretching rate is 7%. Stretching is carried out once every 30 seconds, and the stretching duration is 5 seconds. A centrifugal device is used to remove the excess finishing liquid from the yarn, and the centrifugal speed is 1200 rpm. Example

[0044] Cotton fibers and bamboo fibers are directly blended, and the blending ratio is 1:1. The rotation speed during the blending process is 70 r / min, and the carding angle is 30°. Carding operation is carried out; Then the blended fibers are twisted. The twisting frequency is 70 Hz, and the amplitude is 0.15 mm. No other treatments are applied during the twisting process; Finally, the yarn is naturally dried at room temperature without any special treatment liquid and finishing liquid treatment. Example

[0045] The yarns prepared in Example 1, Example 2, Example 3 and Example 4 were subjected to performance tests, including antistatic performance test, abrasion resistance test, skin-friendly performance test and tensile strength test; The test item of the antistatic performance test was surface resistance test, and the test reference national standard was GB / T 1410-2006 "Test Methods for Volume Resistivity and Surface Resistivity of Solid Insulating Materials"; The test item of the abrasion resistance test was Martindale abrasion test, and the test reference national standard was GB / T 21196.2-2007 "Determination of the Abrasion Resistance of Textiles by the Martindale Method - Part 2: Determination of Specimen Breakage"; The test items of the skin-friendly performance test were subjective evaluation and skin contact test, which were evaluated by volunteer trial wear; The test item of the tensile strength test was tensile test, and the test reference national standard was GB / T 3916-2013 "Determination of Breaking Strength and Elongation at Break of Single Yarns in Wound Packages of Textiles (CRE Method)". Example

[0046] The results of the antistatic performance test on the yarns prepared in Example 1, Example 2, Example 3 and Example 4 were as follows: In the antistatic performance test, according to GB / T 1410-2006 "Test Methods for Volume Resistivity and Surface Resistivity of Solid Insulating Materials", the surface resistance of the yarns prepared in Example 1, 2, 3 and the control yarn of Example 4 was tested under the standard environment of 25 °C and 50% relative humidity.

[0047] The results showed that the surface resistance of the control yarn of Example 4 was relatively high, reaching 10 to the 12th power of ohm, and it was easy to adsorb dust and other impurities due to static electricity during actual use. The surface resistance of the yarn prepared in Example 1 was 10 to the 7th power of ohm, the surface resistance of the yarn prepared in Example 2 was 10 to the 6.5th power of ohm, and the surface resistance of the yarn prepared in Example 3 was 10 to the 7.2th power of ohm. It was shown that by adding composite antistatic particles and optimizing its preparation process, the yarn of the present invention could effectively reduce the surface resistance under this standard environment, had good antistatic performance, and solved the problems of dust absorption and contamination caused by static electricity in traditional yarns.

[0048] The results of the abrasion resistance test on the yarns prepared in Example 1, Example 2, Example 3 and Example 4 were as follows: The abrasion resistance test was carried out according to GB / T 21196.2-2007 "Determination of the Abrasion Resistance of Textiles by the Martindale Method - Part 2: Determination of Specimen Breakage". On the Martindale abrasion tester, a pressure of 9 kPa was applied, standard friction cloth was selected, and each yarn was subjected to 20,000 friction tests under the environment of 28 °C and 60% relative humidity.

[0049] After 20,000 times of friction, the control yarn of Example 4 showed obvious damage and fuzzing, seriously affecting its service life. While the yarn prepared in Example 1 had only slight wear marks on the surface after 20,000 times of friction; the wear degree of the yarn prepared in Example 2 was slightly less than that in Example 1; the yarn prepared in Example 3 also showed good wear resistance, with only a small amount of slight wear. It shows that the functional additive made of bio-based lubricant and nano-titanium dioxide toughening agent in the present invention can effectively improve the wear resistance of the yarn in this specific test environment, solving the problems of easy wear and short life of traditional yarns.

[0050] The results of the skin-friendly performance test on the yarns prepared in Example 1, Example 2, Example 3 and Example 4 are as follows: The skin-friendly performance test was carried out through subjective evaluation and skin contact test. Twenty volunteers were selected and wore clothes made of the yarns prepared in Example 1, 2, 3 and 4 respectively, and carried out daily activities in an environment with a temperature of 30 °C and a relative humidity of 70% for a continuous wearing time of 8 hours.

[0051] For the clothes made of the control yarn of Example 4, the volunteers reported that the hand feeling was rough, and some volunteers had slight skin itching and other discomfort phenomena. For the clothes made of the yarn prepared in Example 1, the volunteers generally reported that the hand feeling was soft and comfortable without obvious discomfort; the clothes made of the yarns prepared in Example 2 and Example 3 also received positive evaluations from the volunteers on softness and comfort, and the skin-friendly performance was good. This shows that through optimizing fiber treatment and adding silicone softeners, etc., the present invention enables the yarn to have better skin-friendly performance in the actual wearing environment, solving the problems of rough hand feeling and poor wearing experience of traditional yarns.

[0052] The results of the tensile strength test on the yarns prepared in Example 1, Example 2, Example 3 and Example 4 are as follows: The tensile strength test was carried out according to GB / T3916-2013 "Determination of breaking strength and elongation at break of single yarn in textile packages (CRE method)". In an environment with a temperature of 23 °C and a relative humidity of 55%, an electronic universal material testing machine was used to conduct a tensile test on each yarn at a tensile speed of 500 mm / min.

[0053] During the tensile process of the control yarn of Example 4, the breaking strength was relatively low, only 200 cN, and it was easy to break. While the breaking strength of the yarn prepared in Example 1 reached 350 cN, the breaking strength of the yarn prepared in Example 2 was 380 cN, and the breaking strength of the yarn prepared in Example 3 was 330 cN. This shows that through methods such as pre-treating the fiber and adding organic crosslinking agents, the present invention effectively improves the tensile strength of the yarn in this test environment, solving the problems of insufficient strength and easy breakage of traditional yarns.

[0054] In summary, compared with the blank control of Example 4, the yarns prepared in Examples 1, 2, and 3 showed significant advantages in antistatic performance, wear resistance, skin-friendly performance, and tensile strength.

[0055] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to embrace all changes that fall within the meaning and scope of the equivalent elements of the claims in the present invention.

Claims

1. A preparation process of an antistatic, wear-resistant and skin-friendly floating soft yarn, characterized in that, The preparation process of the wear-resistant and skin-friendly floating soft yarn includes: S1. Place cotton fibers and bamboo fibers in a plasma device with a vacuum degree of 10 - 20 Pa for pretreatment. After the treatment is completed, circulate hot air to dry the fibers. S2. Make a functional additive from the bio-based lubricant extracted from Jatropha curcas oil and the nano-level titanium dioxide toughening agent. Conduct a preliminary blending of 50% of the cotton fibers and all of the bamboo fibers. After carding and pre-opening, add the functional additive. S3. Surface grafting of nano-zinc oxide antistatic particles and preparation of composite antistatic particles by the sol-gel method. S4. On the basis of the preliminary blending, add the remaining 50% of the cotton fibers, 0.5% - 1% of the composite antistatic particles in the mixed system, and 0.05% - 0.1% of the anti-tangling agent based on the total amount of fibers, and mix and card again. S5. When oscillating and twisting, spray nano-level silica aerogel moisture absorbent on the surface of the fiber bundle, set a pulsed magnetic field, and adjust the frequency and amplitude according to different stages during the twisting process to make the fiber bundle oscillate in the horizontal and vertical directions. S6. Immerse the formed yarn in the treatment liquid, react at a temperature of 50 - 60 °C for 2.5 - 3 hours, then wash with water, dry, and perform infrared-assisted drying. S7. Use the finishing liquid to impregnate the yarn at 85 °C for 35 minutes. During impregnation, use periodic pulsed stretching and remove the excess finishing liquid.

2. The preparation process of an antistatic, wear-resistant and skin-friendly floating soft yarn according to claim 1, characterized in that, In S3, it also includes: S31: Disperse nano-zinc oxide particles in the organic solvent dimethyl sulfoxide. Adopt a combination of ultrasonic dispersion and high-speed stirring. First, perform ultrasonic treatment for 15 minutes with an ultrasonic power of 300 - 400 W, and then use a magnetic stirrer to stir for 30 minutes with a stirring speed of 600 - 800 revolutions per minute. S32: Add 3-sulfopropyl acid which is 1.2 times the mass of the nano-zinc oxide particles as the monomer containing a sulfonic group, and add the initiator azobisisobutyronitrile. The dosage of azobisisobutyronitrile is 1% - 2% of the mass of 3-sulfopropyl acid. Place the reaction system in a constant temperature water bath at 50 - 60 °C, react for 2 - 3 hours, and use a magnetic stirrer to stir with a stirring speed of 300 - 500 revolutions per minute.

3. The preparation process of an antistatic, wear-resistant and skin-friendly floating soft yarn according to claim 1, characterized in that, In S3, it also includes: S33: Dissolve zinc acetate and tetrabutyl titanate in a molar ratio of 3:2 in 150 mL of ethanol solvent, and the total concentration of zinc acetate and tetrabutyl titanate is 0.5 - 1 mol / L. Add deionized water which is 10% - 20% of the volume of the ethanol solvent to the solution dropwise at a dropping speed of 1.2 - 1.8 mL / min, and add glacial acetic acid as a catalyst to adjust the pH value of the solution to 3.2 - 3.

8. S34: Place the solution in an oil bath at 60 - 80 °C for hydrolysis and polycondensation reactions, with a stirring speed of 200 - 300 revolutions per minute and a reaction time of 4 - 6 hours. S35: Separate the composite particles from the sol by centrifugation at a centrifugation speed of 5000 - 8000 revolutions per minute and a centrifugation time of 10 - 20 minutes, and wash them multiple times with deionized water and ethanol to remove unreacted impurities and by-products. Dry them in a vacuum oven at 60 - 80 °C for 12 - 24 hours to obtain the composite antistatic particles.

4. The preparation process of an antistatic, wear-resistant and skin-friendly floating soft yarn according to claim 1, characterized in that, In S1, it also includes: S11: The initial processing power of the plasma equipment is set to 60 W. After processing for 2 minutes, it is gradually increased to 90 W at a rate of 6 W / min, and the total processing time is adjusted to 5 minutes; The intake rate of the plasma equipment is 0.2 - 0.6 L / min; The magnetic field modulation of the plasma equipment adopts a square wave modulation method. The magnetic field intensity periodically changes according to the square wave law between 0.02 T and 0.06 T. The square wave period is 8 s, the high-level duration is 3 s, and the low-level duration is 5 s; S12: Maintain the pressure in the drying equipment in a vacuum environment of 50 - 100 Pa. The hot air circulation rate is 0.5 - 1 m / s, the drying temperature is set to 70 - 90 °C, and a gradient heating mode is adopted. In the first 2 minutes, it is heated from room temperature to 70 °C at a rate of 10 °C / min, and then maintained within the range of 70 - 90 °C for 3 - 5 minutes.

5. The preparation process of an antistatic, wear-resistant and skin-friendly floating soft yarn according to claim 1, characterized in that, In S2, it also includes: S21: When the fiber linear density is 1.5 - 2.0 dtex, the length is 30 - 35 mm, and the card clothing density is 230 teeth per square inch, add functional additives; S22: The bio-based lubricant is extracted by supercritical fluid extraction technology, with a purity greater than 95%. The bio-based lubricant accounts for 60% - 70% of the total amount of additives; S23: The average particle size of the nano-titanium dioxide toughening agent is 50 - 80 nm, and the nano-toughening agent accounts for 30% - 40% of the total amount of additives.

6. The preparation process of an antistatic, wear-resistant and skin-friendly floating soft yarn according to claim 1, characterized in that, In S4, it also includes: S41: In the initial stage of the blending process, the rotation speed is set to 50 - 60 r / min. After 10 - 15 minutes, the rotation speed is increased to 80 - 100 r / min. In the later stage of mixing, the rotation speed is reduced to 60 - 70 r / min S42: During the carding process, set the initial carding angle to 30°. Increase the carding angle by 2° every 5 minutes until it reaches 40°.

7. The preparation process of an antistatic, wear-resistant and skin-friendly floating soft yarn according to claim 1, characterized in that In S5, it also includes: S51: The spraying amount of the moisture absorbent is controlled by a micro-injection pump. The addition amount of the moisture absorbent is 0.01% - 0.05% of the fiber weight, and it is evenly sprayed at a speed of 0.005 mL / min; S52: The magnetic field intensity of the pulsed magnetic field changes periodically between 0.02 - 0.08 T. Set the pulse period to 2 s. Within each period, the magnetic field intensity remains at 0.02 T for 0.5 s, then rises to 0.08 T within 0.5 s, and then drops to 0.02 T within 1 s; S53: Within the first 5 minutes of twisting, the frequency is linearly increased from 50 Hz to 80 Hz, and the amplitude is increased from 0.1 mm to 0.2 mm. In the next 10 minutes, the frequency remains stable at 80 Hz, and the amplitude increases to 0.25 mm. In the last 5 minutes of twisting, the frequency is reduced to 60 Hz, and the amplitude drops back to 0.15 mm; The oscillation frequency in the horizontal direction is set to 50 - 80 Hz, and the oscillation frequency in the vertical direction is 60 - 90 Hz. The amplitudes in both directions are controlled between 0.1 - 0.2 mm.

8. The preparation process of an antistatic, wear-resistant and skin-friendly floating soft yarn according to claim 1, characterized in that In S6, it also includes: S61: The treatment liquid comprises 3.5% - 4.5% of a polycaprolactone-based biodegradable polyester organic crosslinking agent, 0.6% - 0.9% of a zinc-copper bimetallic complex, and 0.1% - 0.3% of a fatty alcohol polyoxyethylene ether. The treatment liquid is ultrasonically stirred with an ultrasonic power of 200 - 300 W, an ultrasonic frequency of 30 kHz, and an ultrasonic time of 20 - 25 minutes; S62: The infrared power for infrared-assisted drying is 500 - 800 W.

9. The preparation process of an antistatic, wear-resistant and skin-friendly floating soft yarn according to claim 1, characterized in that, In S7, it further includes: S71: The finishing liquid comprises 6% - 7% of an organosilicon softening agent, 4% - 4.5% of a nano-titanium dioxide wear-resistant enhancer, 0.7% - 0.9% of a silver ion antibacterial agent, and 2.5% of an antistatic agent; S72: The elongation rate is 7% - 9%. Stretching is performed once every 30 seconds with a stretching duration of 5 seconds. After impregnation treatment, a centrifugal device is used to remove the excess finishing liquid from the yarn, and the centrifugal speed is 1200 - 1400 rpm.

10. An antistatic, wear-resistant and skin-friendly floating soft yarn, characterized in that: Prepared by the preparation process of an antistatic wear-resistant skin-friendly floating soft yarn according to any one of claims 1 - 8.