A superconducting wet-drying yarn, its preparation method and application

Abstract

This invention relates to the field of yarn technology, specifically disclosing a superconducting wet-drying yarn, its preparation method, and its application. The yarn is prepared by blending high-shrinkage polyester fibers and cotton fibers. The preparation of the high-shrinkage polyester fibers includes two parts: raw material synthesis and fiber forming. Terephthalic acid and ethylene glycol are used as raw materials. After the esterification reaction, polyethylene glycol and aromatic dicarboxylic acid ester sulfonate are added, resulting in high-shrinkage polyester chips. These chips are then used as raw materials for spinning to obtain high-shrinkage polyester fibers. Through the two-component design of the yarn, a micro-circulation diffusion system with superconducting moisture absorption and sweat-wicking effect is formed, effectively improving the hygroscopicity of the polyester fibers. Even after multiple washes, it still possesses excellent superconducting wet-drying properties, long-lasting efficacy, and good wash resistance, without causing uneven dyeing or unidirectional moisture wicking problems.

Description

Technical Field

[0001] This invention relates to the field of yarn technology, specifically to a superconducting wet-drying yarn, its preparation method, and its application. Background Technology

[0002] As people's living standards improve, their demands for clothing, food, housing, and transportation also increase. Among these, people's requirements for clothing selection have changed, with comfort and health gradually becoming key factors. The moisture-wicking property of fabrics is an important indicator affecting their comfort. If fabrics cannot effectively wick away sweat, discomfort will occur, and bacteria will grow. Compared to traditional fabrics, fabrics with moisture-wicking and quick-drying properties can rapidly absorb and diffuse sweat from the skin, accelerating evaporation. Ensuring that sweat and other liquids are guided from the inside of the fabric to the outside and evaporated quickly, while preventing the liquid from flowing back to the inside, becomes the decisive factor affecting the moisture-wicking property of fabrics.

[0003] Chinese patent application CN110241470A discloses a polyester yarn with high moisture-wicking properties and its manufacturing method. This polyester yarn is made by blending polyester fibers with a straight cross-section and a cross-shaped cross-section. The resulting polyester yarn exhibits a significant increase in the number of capillaries and porosity, resulting in a marked improvement in capillary wicking effect and significantly enhanced moisture-wicking performance. While the cross-shaped cross-section of the fibers increases the specific surface area and accelerates moisture evaporation, it is difficult to ensure uniform fiber dyeing. Furthermore, due to the irregular cross-section spinning, spinnability is reduced, leading to horizontal stripes on the woven fabric. Chinese patent application CN111826961A discloses a production process for a unidirectional moisture-wicking and UV-resistant polyester fabric. It employs a UV-resistant finishing liquid and a hyperbranched polymer, resulting in better UV protection and washability. A water-repellent single-sided coating is applied first, followed by a moisture-wicking finishing process. This allows the fabric to retain water repellency on one side while possessing excellent moisture-wicking capabilities, enabling unidirectional moisture wicking. The finishing process often involves adding moisture-wicking finishing agents, which are easily washed off, thus affecting the moisture-wicking function. It is designed to wick away moisture in one direction, but there will always be one side that is damp. If it faces outwards, it will affect the appearance, and if it faces inwards, it will stick to the body and be very uncomfortable. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a superconducting wet-drying yarn, its preparation method, and its application, thus solving the problem of the generally poor moisture-wicking and quick-drying performance of traditional yarns.

[0005] To achieve the above objectives, this invention discloses a method for preparing superconducting wet-drying yarn, comprising the following steps:

[0006] Step 1: Preparation of high-shrinkage polyester chips: Terephthalic acid is used as the first monomer and ethylene glycol as the second monomer to undergo an esterification reaction. After the reaction is completed, polyethylene glycol as the third monomer and aromatic dicarboxylic acid ester sulfonate as the fourth monomer are added and reacted. After the reaction is completed, high-shrinkage polyester chips are obtained.

[0007] Step 2: Preparation of high-shrinkage polyester fiber: High-shrinkage polyester chips are spun to obtain polyester fiber, and the polyester fiber is stretched at low speed to obtain high-shrinkage polyester fiber.

[0008] Step 3: Preparation of superconducting wet-drying yarn: High-shrinkage polyester fiber and cotton fiber are blended together to obtain superconducting wet-drying yarn.

[0009] Preferably, the specific steps for preparing high-shrinkage polyester chips in step one are as follows: Terephthalic acid (PTA) is used as the first monomer, and ethylene glycol (EG) is used as the second monomer. These are added to a reaction vessel. A protective gas is introduced into the reaction vessel. After the pressure reaches 120 kPa, the valve is opened to release pressure. After reaching atmospheric pressure, the valve is closed, and the protective gas is introduced into the reaction vessel again. This process is repeated three times to ensure that the air inside the reaction vessel is purged. Then, a protective gas is introduced, and the pressure reaches 150 kPa for esterification. The reaction vessel temperature is set to 260°C, and the stirrer is used for stirring at a frequency of 50 Hz. The pressure is controlled at 350 kPa. The exhaust valve is opened to slowly reduce the pressure to atmospheric pressure. When the moisture and acidity in the reactants reach stable values ​​and no longer change significantly, the reactants are then added from the feed port. The third monomer is polyethylene glycol 6000 (PEG) with a molecular weight of 6000, and the fourth monomer is aromatic dicarboxylic acid ester sulfonate. The molar ratio of terephthalic acid, ethylene glycol, polyethylene glycol 6000 and aromatic dicarboxylic acid ester sulfonate is 1:(0.5-1.3):(0.1-0.2):(0.2-0.5). After reacting for 1 hour under normal pressure, the temperature of the reactor is adjusted to 278℃, and the valve between the reactor and the polycondensation condenser is opened to initiate the polycondensation reaction. During the polycondensation process, the vacuum pump is turned on, and the vacuum level in the reactor is slowly reduced at a rate of 10 min / 20 kPa through the vacuum fine-tuning valve until it reaches a vacuum state. The polycondensation reaction takes 1 hour. After the reaction is completed, the material is released from the bottom of the reactor and granulated to prepare high-shrinkage polyester chips.

[0010] Preferably, the specific steps for preparing high-shrinkage polyester fibers in step two are as follows: high-shrinkage polyester chips are spun at a low speed of 2500-3000 m / min. After spinning, polyester fibers are obtained. The polyester fibers are then subjected to low-speed stretching in hot water at 50-70℃, wherein the stretching ratio is 4-5, to obtain high-shrinkage polyester fibers.

[0011] Preferably, the specific steps for preparing the superconducting wet-drying yarn in step three are as follows: high-shrinkage polyester fiber and cotton fiber are mixed evenly in a mixer, opened by an opener, and then sent to a combing machine to obtain a mixed fiber sliver, which is then processed through pre-spinning, fine spinning, and winding to obtain the superconducting wet-drying yarn.

[0012] Preferably, in the specific steps of preparing high-shrinkage polyester chips in step one, the molar ratio of terephthalic acid, ethylene glycol, polyethylene glycol 6000 and aromatic dicarboxylic acid ester sulfonate is 1:0.8:0.2:0.3.

[0013] Preferably, the protective gas in the specific steps of preparing high-shrinkage polyester chips in step one includes any one of nitrogen, argon, and helium.

[0014] In step three, the mass ratio of high-shrinkage polyester fiber to cotton fiber is (50-63):(37-50).

[0015] Preferably, the specific steps in step three for preparing the superconducting wet-drying yarn include the pre-spinning, spinning, and winding processes of initially processing the mixed fiber strips into roving, processing the roving into fine yarn, and reprocessing the fine yarn and winding it onto a paper tube.

[0016] Preferably, the superconducting wet-drying yarn prepared by the method described above is a superconducting wet-drying yarn.

[0017] Preferably, the superconducting wet-drying yarn is used in superconducting wet-drying fabrics.

[0018] Preferably, the application of the superconducting wet-drying yarn in the superconducting wet-drying fabric is described in the following manner: using the superconducting wet-drying yarn as raw material, a base fabric is woven, and then treated by washing in boiling water at 98-100℃ for 10 minutes to obtain the superconducting wet-drying fabric.

[0019] The preparation of high-shrinkage polyester fiber in this invention includes two parts: raw material synthesis and fiber forming. Terephthalic acid and ethylene glycol are used as raw materials. After the esterification reaction, polyethylene glycol and aromatic dicarboxylic acid ester sulfonate are added. After the reaction, high-shrinkage polyester chips are obtained. High-shrinkage polyester chips are used as raw materials for spinning to obtain high-shrinkage polyester fibers. The high-shrinkage polyester fibers and cotton fibers are blended to obtain superconducting wet-drying yarn.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] The monomer ratio in the polyester synthesis process of this invention was obtained through extensive research, which can better improve the shrinkage performance of polyester. High-shrinkage polyester fibers have high strength, good abrasion resistance, good heat resistance, and good elasticity, but poor moisture absorption. Cotton fibers have good moisture absorption, ventilation and breathability, as well as a comfortable feel and good heat resistance. Through the two-component design of the yarn, the yarn with a high shrinkage rate is spun first during spinning and then blended with the yarn with a lower shrinkage rate, forming a micro-circulation diffusion system with a super-conductive moisture absorption and sweat effect. The hydroxyl groups on cotton fibers and high-shrinkage polyester fibers are both active functional groups, which easily generate intermolecular forces, and the forces between them are stronger. During the normal dyeing process of the woven fabric, the high-shrinkage fibers shrink, causing the cotton fibers to be squeezed longitudinally from the yarn, forming cavities between the fibers, forming water storage spaces within the fabric. These spaces are linked together to form water-conducting channels, which can effectively improve the moisture absorption of polyester fibers. The yarn prepared after mixing has excellent super-conductive moisture-drying effect.

[0022] In the fabric manufacturing process of the superconducting quick-drying yarn in this invention, the shrinkage component of the yarn shrinks into a microporous system with a very large surface area, forming countless continuous water-conducting honeycomb structures within the yarn. When sweat drips onto the yarn, the honeycomb pores quickly break the sweat into discontinuous droplets, which are then rapidly absorbed into the honeycomb pits, forming a continuous phase of sweat. This rapidly guides the sweat to diffuse into the outer space of the yarn and dissipates it. Combined with the wicking effect in the fabric's structural design, the resulting superconducting quick-drying fabric achieves the effect of sweat disappearing, exhibiting excellent superconducting quick-drying performance. Furthermore, the superconducting quick-drying yarn and fabric retain their excellent superconducting quick-drying performance even after multiple washes, demonstrating long-lasting effectiveness, good washability, and avoiding problems such as uneven dyeing and one-way moisture wicking. Attached Figure Description

[0023] Figure 1 These are water absorption rate test charts of the superconducting wet-drying fabrics corresponding to Examples 1-4 and Comparative Examples 1-2 in this invention;

[0024] Figure 2 These are test diagrams of the water diffusion time of the superconducting wet-drying fabrics corresponding to Examples 1-4 and Comparative Examples 1-2 in this invention;

[0025] Figure 3 These are wicking height test diagrams of the superconducting wet-drying fabrics corresponding to Examples 1-4 and Comparative Examples 1-2 in this invention. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0027] Example 1

[0028] A method for preparing superconducting wet-drying yarn includes the following steps:

[0029] Step 1: Preparation of high-shrinkage polyester chips: Using terephthalic acid as the first monomer and ethylene glycol as the second monomer, they are added to a reactor. A protective gas is introduced into the reactor, and after the pressure reaches 120 kPa, the valve is opened to release the pressure. After reaching atmospheric pressure, the valve is closed, and nitrogen is introduced into the reactor. This process is repeated three times to ensure that the air inside the reactor is purged. Nitrogen is then introduced, and the pressure reaches 150 kPa for esterification. The reactor temperature is set to 260℃, and the stirrer is used to a stirring frequency of 50 Hz. The pressure is controlled at 350 kPa. The exhaust valve is opened to slowly reduce the pressure to atmospheric pressure. When the moisture and acidity in the reactants reach stable values ​​and no longer change significantly, the third batch is introduced through the feed port. Polyethylene glycol 6000 with a monomer molecular weight of 6000 and the fourth monomer aromatic dicarboxylic acid ester sulfonate, wherein the molar ratio of terephthalic acid, ethylene glycol, polyethylene glycol 6000 and aromatic dicarboxylic acid ester sulfonate is 1:0.5:0.1:0.2, reacted at atmospheric pressure for 1 hour, the temperature of the reactor was adjusted to 278℃, the valve between the reactor and the polycondensation condenser was opened, and the polycondensation reaction occurred. During the polycondensation process, the vacuum pump was turned on, and the vacuum degree in the reactor was slowly reduced at a rate of 10 min / 20 kPa through the vacuum fine-tuning valve until it reached a vacuum state. The polycondensation reaction time was 1 hour. After the reaction was completed, the material was released from the bottom of the reactor and granulated to prepare high-shrinkage polyester chips.

[0030] Step 2: Preparation of high-shrinkage polyester fiber: The high-shrinkage polyester chips are spun at a low speed of 2500 m / min. After spinning, polyester fiber is obtained. The polyester fiber is then stretched at a low speed in hot water at 50°C with a stretching ratio of 4 to obtain high-shrinkage polyester fiber.

[0031] Step 3: Preparation of superconducting wet-drying yarn: High-shrinkage polyester fiber and cotton fiber with a mass ratio of 50:37 are mixed evenly in a mixer, opened by an opening machine and sent to a combing machine to obtain a mixed fiber sliver. The mixed fiber sliver is then preliminarily processed into roving, the roving is processed into fine yarn, and the fine yarn is wound onto a paper tube to obtain superconducting wet-drying yarn.

[0032] Example 2

[0033] A method for preparing superconducting wet-drying yarn includes the following steps:

[0034] Step 1: Preparation of high-shrinkage polyester chips: Using terephthalic acid as the first monomer and ethylene glycol as the second monomer, they are added to a reactor. A protective gas is introduced into the reactor, and after the pressure reaches 120 kPa, the valve is opened to release the pressure. After reaching atmospheric pressure, the valve is closed, and nitrogen is introduced into the reactor. This process is repeated three times to ensure that the air inside the reactor is purged. Nitrogen is then introduced, and the pressure reaches 150 kPa for esterification. The reactor temperature is set to 260℃, and the stirrer is used to a stirring frequency of 50 Hz. The pressure is controlled at 350 kPa. The exhaust valve is opened to slowly reduce the pressure to atmospheric pressure. When the moisture and acidity in the reactants reach stable values ​​and no longer change significantly, the third batch is introduced through the feed port. Polyethylene glycol 6000 with a monomer molecular weight of 6000 and the fourth monomer aromatic dicarboxylic acid ester sulfonate, wherein the molar ratio of terephthalic acid, ethylene glycol, polyethylene glycol 6000 and aromatic dicarboxylic acid ester sulfonate is 1:0.8:0.15:0.3, reacted at atmospheric pressure for 1 hour, the temperature of the reactor was adjusted to 278℃, the valve between the reactor and the polycondensation condenser was opened, and the polycondensation reaction occurred. During the polycondensation process, the vacuum pump was turned on, and the vacuum degree in the reactor was slowly reduced at a rate of 10 min / 20 kPa through the vacuum fine-tuning valve until it reached a vacuum state. The polycondensation reaction time was 1 hour. After the reaction was completed, the material was released from the bottom of the reactor and granulated to prepare high-shrinkage polyester chips.

[0035] Step 2: Preparation of high-shrinkage polyester fiber: The high-shrinkage polyester chips are spun at a low speed of 2800 m / min. After spinning, polyester fiber is obtained. The polyester fiber is then stretched at a low speed in hot water at 55°C with a stretch ratio of 4.5 to obtain high-shrinkage polyester fiber.

[0036] Step 3: Preparation of superconducting wet-drying yarn: High-shrinkage polyester fiber and cotton fiber with a mass ratio of 55:42 are mixed evenly in a mixer, opened by an opening machine and sent to a combing machine to obtain a mixed fiber sliver. The mixed fiber sliver is then preliminarily processed into roving, the roving is processed into fine yarn, and the fine yarn is wound onto a paper tube to obtain superconducting wet-drying yarn.

[0037] Example 3

[0038] A method for preparing superconducting wet-drying yarn includes the following steps:

[0039] Step 1: Preparation of high-shrinkage polyester chips: Using terephthalic acid as the first monomer and ethylene glycol as the second monomer, they are added to a reactor. A protective gas is introduced into the reactor, and after the pressure reaches 120 kPa, the valve is opened to release the pressure. After reaching atmospheric pressure, the valve is closed, and nitrogen is introduced into the reactor. This process is repeated three times to ensure that the air inside the reactor is purged. Nitrogen is then introduced, and the pressure reaches 150 kPa for esterification. The reactor temperature is set to 260℃, and the stirrer is used to a stirring frequency of 50 Hz. The pressure is controlled at 350 kPa. The exhaust valve is opened to slowly reduce the pressure to atmospheric pressure. When the moisture and acidity in the reactants reach stable values ​​and no longer change significantly, the third batch is introduced through the feed port. Polyethylene glycol 6000 with a monomer molecular weight of 6000 and the fourth monomer aromatic dicarboxylic acid ester sulfonate, wherein the molar ratio of terephthalic acid, ethylene glycol, polyethylene glycol 6000 and aromatic dicarboxylic acid ester sulfonate is 1:0.8:0.2:0.3, reacted at atmospheric pressure for 1 hour, the temperature of the reactor was adjusted to 278℃, the valve between the reactor and the polycondensation condenser was opened, and the polycondensation reaction occurred. During the polycondensation process, the vacuum pump was turned on, and the vacuum degree in the reactor was slowly reduced at a rate of 10 min / 20 kPa through the vacuum fine-tuning valve until it reached a vacuum state. The polycondensation reaction time was 1 hour. After the reaction was completed, the material was released from the bottom of the reactor and granulated to prepare high-shrinkage polyester chips.

[0040] Step 2: Preparation of high-shrinkage polyester fiber: The high-shrinkage polyester chips are spun at a low speed of 2800 m / min. After spinning, polyester fiber is obtained. The polyester fiber is then stretched at a low speed in hot water at 65°C with a stretch ratio of 4.8 to obtain high-shrinkage polyester fiber.

[0041] Step 3: Preparation of superconducting wet-drying yarn: High-shrinkage polyester fiber and cotton fiber with a mass ratio of 60:45 are mixed evenly in a mixer, opened by an opener and sent to a comber to obtain a mixed fiber sliver. The mixed fiber sliver is then preliminarily processed into roving, the roving is processed into fine yarn, and the fine yarn is wound onto a paper tube to obtain superconducting wet-drying yarn.

[0042] Example 4

[0043] A method for preparing superconducting wet-drying yarn includes the following steps:

[0044] Step 1: Preparation of high-shrinkage polyester chips: Using terephthalic acid as the first monomer and ethylene glycol as the second monomer, they are added to a reactor. A protective gas is introduced into the reactor, and after the pressure reaches 120 kPa, the valve is opened to release the pressure. After reaching atmospheric pressure, the valve is closed, and nitrogen is introduced into the reactor. This process is repeated three times to ensure that the air inside the reactor is purged. Nitrogen is then introduced, and the pressure reaches 150 kPa for esterification. The reactor temperature is set to 260℃, and the stirrer is used to a stirring frequency of 50 Hz. The pressure is controlled at 350 kPa. The exhaust valve is opened to slowly reduce the pressure to atmospheric pressure. When the moisture and acidity in the reactants reach stable values ​​and no longer change significantly, the third batch is introduced through the feed port. Polyethylene glycol 6000 with a monomer molecular weight of 6000 and the fourth monomer aromatic dicarboxylic acid ester sulfonate, wherein the molar ratio of terephthalic acid, ethylene glycol, polyethylene glycol 6000 and aromatic dicarboxylic acid ester sulfonate is 1:1.3:0.2:0.5, reacted at atmospheric pressure for 1 hour, the temperature of the reactor was adjusted to 278℃, the valve between the reactor and the polycondensation condenser was opened, and the polycondensation reaction occurred. During the polycondensation process, the vacuum pump was turned on, and the vacuum degree in the reactor was slowly reduced at a rate of 10 min / 20 kPa through the vacuum fine-tuning valve until it reached a vacuum state. The polycondensation reaction time was 1 hour. After the reaction was completed, the material was released from the bottom of the reactor and granulated to prepare high-shrinkage polyester chips.

[0045] Step 2: Preparation of high-shrinkage polyester fiber: The high-shrinkage polyester chips are spun at a low speed of 3000 m / min. After spinning, polyester fiber is obtained. The polyester fiber is then stretched at a low speed in hot water at 70°C with a stretching ratio of 5 to obtain high-shrinkage polyester fiber.

[0046] Step 3: Preparation of superconducting wet-drying yarn: High-shrinkage polyester fiber and cotton fiber with a mass ratio of 63:50 are mixed evenly in a mixer, opened by an opener and sent to a comber to obtain a mixed fiber sliver. The mixed fiber sliver is then preliminarily processed into roving, the roving is processed into fine yarn, and the fine yarn is wound onto a paper tube to obtain superconducting wet-drying yarn.

[0047] Comparative Example 1

[0048] A method for preparing superconducting wet-drying yarn includes the following steps:

[0049] Step 1: Preparation of high-shrinkage polyester chips: Using terephthalic acid as the first monomer and ethylene glycol as the second monomer, they are added to a reactor. A protective gas is introduced into the reactor, and after the pressure reaches 120 kPa, the valve is opened to release the pressure. After reaching atmospheric pressure, the valve is closed, and nitrogen is introduced into the reactor. This process is repeated three times to ensure that the air inside the reactor is purged. Nitrogen is then introduced, and the pressure reaches 150 kPa for esterification. The reactor temperature is set to 260℃, and the stirrer is used to a stirring frequency of 50 Hz. The pressure is controlled at 350 kPa. The exhaust valve is opened to slowly reduce the pressure to atmospheric pressure. When the moisture and acidity in the reactants reach stable values ​​and no longer change significantly, the third batch is introduced through the feed port. Polyethylene glycol 6000 with a monomer molecular weight of 6000 and the fourth monomer aromatic dicarboxylic acid ester sulfonate, wherein the molar ratio of terephthalic acid, ethylene glycol, polyethylene glycol 6000 and aromatic dicarboxylic acid ester sulfonate is 1:0.8:0.2:0.3, reacted at atmospheric pressure for 1 hour, the temperature of the reactor was adjusted to 278℃, the valve between the reactor and the polycondensation condenser was opened, and the polycondensation reaction occurred. During the polycondensation process, the vacuum pump was turned on, and the vacuum degree in the reactor was slowly reduced at a rate of 10 min / 20 kPa through the vacuum fine-tuning valve until it reached a vacuum state. The polycondensation reaction time was 1 hour. After the reaction was completed, the material was released from the bottom of the reactor and granulated to prepare high-shrinkage polyester chips.

[0050] Step 2: Preparation of high-shrinkage polyester fiber: The high-shrinkage polyester chips are spun at a low speed of 2800 m / min. After spinning, polyester fiber is obtained. The polyester fiber is then stretched at a low speed in hot water at 65°C with a stretch ratio of 4.8 to obtain high-shrinkage polyester fiber.

[0051] Step 3: Preparation of superconducting wet-drying yarn: After the high-shrinkage polyester fibers are opened by an opening machine, they are fed into a combing machine to obtain a mixed fiber sliver. The mixed fiber sliver is then preliminarily processed into roving, the roving is processed into fine yarn, and the fine yarn is wound onto a paper tube to obtain superconducting wet-drying yarn.

[0052] Comparative Example 2

[0053] A method for preparing superconducting wet-drying yarn includes the following steps:

[0054] Step 1: Preparation of polyester fiber: Polyester chips are spun at a low speed of 2800 m / min. After spinning, polyester fiber is obtained. The polyester fiber is then stretched at a low speed in hot water at 65°C with a stretch ratio of 4.8 to obtain polyester fiber.

[0055] Step 2: Preparation of superconducting wet-drying yarn: Polyester fiber and cotton fiber with a mass ratio of 60:45 are mixed evenly in a mixer, opened by an opening machine and then sent to a combing machine to obtain a mixed fiber sliver. The mixed fiber sliver is then preliminarily processed into roving, the roving is processed into fine yarn, and the fine yarn is wound onto a paper tube to obtain superconducting wet-drying yarn.

[0056] The cotton fibers used in the embodiments and comparative examples of this invention are Xinjiang long-staple cotton with a fiber length of 38-39.7 mm; the polyester chips were purchased from Anhui Longyang Environmental Protection Technology Co., Ltd.; and other reagents were commercially available.

[0057] The superconducting wet-drying yarns obtained in Examples 1-4 and Comparative Examples 1-2 were used as raw materials to weave a base fabric, which was then washed in boiling water at 100°C for 10 minutes to obtain a superconducting wet-drying fabric. Performance tests were then conducted, as follows:

[0058] (1) Moisture absorption performance test: The samples were tested according to the national standard GB / T 21655.1-2008 "Evaluation of moisture absorption and quick-drying properties of textiles - Part 1: Single combination test method". The performance test results are shown in Table 1.

[0059] Table 1

[0060]

[0061] As can be seen from the test results in Table 1, the fabrics corresponding to Examples 1-4 have excellent moisture-wicking properties. Cotton fibers have good moisture absorption and breathability. Through the two-component design of the yarn, a micro-circulation diffusion system with super-conductive sweat absorption effect is formed, resulting in excellent super-conductive moisture-wicking and quick-drying performance. The fabric corresponding to Example 3 has a water absorption rate of 320%, a drip diffusion time of 1.9s, and a wicking height of 127mm. Comparative Example 1, which did not contain cotton fibers, resulted in fabrics with poor moisture-wicking properties, a water absorption rate of 208%, a drip diffusion time of 3.0s, and a wicking height of 102mm. The polyester chips in the yarn of Comparative Example 1 were not high-shrinkage polyester chips, which had a significant impact on the fabric performance. The fabric had a water absorption rate of 271%, a drip diffusion time of 2.7s, and a wicking height of 109mm.

[0062] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A method for preparing superconducting wet-drying yarn, characterized in that: Includes the following steps: Step 1: Preparation of high-shrinkage polyester chips: Terephthalic acid is used as the first monomer and ethylene glycol as the second monomer to undergo an esterification reaction. After the reaction is completed, polyethylene glycol as the third monomer and aromatic dicarboxylic acid ester sulfonate as the fourth monomer are added and reacted. After the reaction is completed, high-shrinkage polyester chips are obtained. Step 2: Preparation of high-shrinkage polyester fiber: High-shrinkage polyester chips are spun to obtain polyester fiber, and the polyester fiber is stretched at low speed to obtain high-shrinkage polyester fiber. Step 3: Preparation of superconducting wet-drying yarn: High-shrinkage polyester fiber and cotton fiber are blended together to obtain superconducting wet-drying yarn after blending. The specific steps for preparing high-shrinkage polyester chips in step one are as follows: Terephthalic acid is used as the first monomer and ethylene glycol as the second monomer, both added to a reaction vessel. A protective gas is introduced into the reaction vessel, and after the pressure reaches 120 kPa, the valve is opened to release pressure. After reaching atmospheric pressure, the valve is closed, and the protective gas is introduced into the reaction vessel again. This process is repeated three times to ensure that the air inside the reaction vessel is purged. Then, a protective gas is introduced, and the pressure reaches 150 kPa for esterification. The reaction vessel temperature is set to 260°C, and a stirrer is used to stir at a frequency of 50 Hz. The pressure is controlled at 350 kPa. The exhaust valve is opened to slowly reduce the pressure to atmospheric pressure. When the moisture and acidity in the reactants reach stable values ​​and no longer change significantly, the third monomer is added through the feeding port. Polyethylene glycol 6000 with a molecular weight of 6000 and the fourth monomer, aromatic dicarboxylic acid ester sulfonate, were reacted at atmospheric pressure for 1 hour. The molar ratio of terephthalic acid, ethylene glycol, polyethylene glycol 6000 and aromatic dicarboxylic acid ester sulfonate was 1:(0.5-1.3):(0.1-0.2):(0.2-0.5). The reaction was carried out at atmospheric pressure for 1 hour. The temperature of the reactor was then adjusted to 278°C. The valve between the reactor and the polycondensation condenser was opened to initiate the polycondensation reaction. During the polycondensation process, the vacuum pump was turned on, and the vacuum level in the reactor was slowly reduced at a rate of 10 min / 20 kPa through the vacuum fine-tuning valve until it reached a vacuum state. The polycondensation reaction lasted for 1 hour. After the reaction was completed, the material was discharged from the bottom of the reactor and granulated to prepare high-shrinkage polyester chips. In step three, the mass ratio of high-shrinkage polyester fiber to cotton fiber is (50-63):(37-50); The specific steps for preparing superconducting wet-drying yarn in step three are as follows: high-shrinkage polyester fiber and cotton fiber are mixed evenly in a mixer, opened by an opening machine, and then sent to a combing machine to obtain a mixed fiber sliver. After pre-spinning, spinning, and winding, superconducting wet-drying yarn is obtained.

2. The method for preparing a superconducting wet-drying yarn according to claim 1, characterized in that: The specific steps for preparing high-shrinkage polyester fibers in step two are as follows: high-shrinkage polyester chips are spun at a low speed of 2500-3000 m / min. After spinning, polyester fibers are obtained. The polyester fibers are then subjected to low-speed stretching in hot water at 50-70℃, with a stretching ratio of 4-5, to obtain high-shrinkage polyester fibers.

3. The method for preparing a superconducting wet-drying yarn according to claim 1, characterized in that: The molar ratio of terephthalic acid, ethylene glycol, polyethylene glycol 6000 and aromatic dicarboxylic acid ester sulfonate is 1:0.8:0.2:0.

3.

4. The method for preparing a superconducting wet-drying yarn according to claim 1, characterized in that: The protective gas includes any one of nitrogen, argon, and helium.

5. A superconducting wet-drying yarn prepared by the method for preparing superconducting wet-drying yarn as described in any one of claims 1-4.

6. The application of the superconducting wet-drying yarn as described in claim 5 in superconducting wet-drying fabrics.

Images