Knitted fabric for temperature-controllable underwear and method for manufacturing the same

Abstract

The present application relates to the technical field of knitted fabric, and particularly relates to a controllable temperature knitted fabric for underwear and a preparation method thereof, comprising the following steps: blending chitosan fiber, nano-silver fiber and polyester fiber according to a weight ratio of 1:1:2 to form first blended yarn; mixing a base agent containing temperature control capsules, a modified blending agent and a filler auxiliary agent according to a weight ratio of (11-13):3:2, feeding into a double screw extruder for melt extrusion, and then performing spinning treatment to obtain modified polyester fiber. The knitted fabric of the present application uses chitosan fiber in combination with nano-silver fiber and polyester fiber to form first blended yarn through blending, and the obtained knitted fabric realizes coordinated improvement in temperature control, air permeability, stain resistance and antibacterial property, and the performance stability of the product under washing and ultraviolet high-temperature conditions is significantly improved.

Description

Technical Field

[0001] This invention relates to the field of knitted fabric technology, specifically to a knitted fabric for temperature-controlled underwear and its preparation method. Background Technology

[0002] Knitted fabrics are fabrics formed by bending yarns into loops and interlocking them using knitting needles. The difference between knitted and woven fabrics lies in the different forms of the yarns in the fabric. Knitting is divided into weft knitting and warp knitting. Knitted fabrics are widely used in clothing fabrics and linings, home textiles and other products, and are loved by consumers.

[0003] Existing knitted underwear fabrics have poor temperature control performance, as well as poor breathability, antibacterial and stain resistance. It is difficult to achieve coordinated improvement in temperature control, breathability, antibacterial and stain resistance. At the same time, the products have poor performance stability under washing and ultraviolet high heat conditions, which further limits the efficiency of product use. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the purpose of this invention is to provide a knitted fabric for temperature-controlled underwear and a method for preparing the same, so as to solve the problems mentioned in the background art.

[0005] The present invention solves the technical problem by adopting the following technical solution:

[0006] This invention provides a method for preparing a knitted fabric for temperature-controlled underwear, comprising the following steps:

[0007] Step 1: Blend chitosan fiber, nano silver fiber and polyester fiber in a weight ratio of 1:1:2 to form the first blended yarn;

[0008] Step 2: The matrix agent containing the temperature-controlled capsule, the modifier and the filler are mixed at a weight ratio of (11-13):3:2 and fed into a twin-screw extruder for melt extrusion, followed by spinning to obtain modified polyester fibers;

[0009] The matrix agent containing the temperature-controlled capsule is obtained by mixing the temperature-controlled capsule, polyethylene terephthalate, dimethyl terephthalate and polyethylene glycol 2000 in a weight ratio of 8:20:70:15.

[0010] Step 3: Blend the modified polyester fiber and cotton fiber at a weight ratio of 2:3 to form a second blended yarn;

[0011] Step 4: Knit the first blended yarn and the second blended yarn using a circular knitting machine to obtain the knitted fabric for temperature-controlled underwear; wherein the twist coefficient of the first blended yarn is 260 and the twist coefficient of the second blended yarn is 360.

[0012] Preferably, the temperatures of the six temperature zones from the feed end to the die head of the twin-screw extruder are 275°C, 280°C, 285°C, 290°C, 290°C, and 290°C, respectively; the spinning temperature of the spinning process is 280°C.

[0013] The preparation method of the temperature-controlled capsule is as follows:

[0014] Stir 1L of 1.5% (w / w) gum arabic aqueous solution until transparent and homogeneous; heat 141g of paraffin wax to melt, then add it to the gum arabic aqueous solution and emulsify for 20 minutes to obtain an emulsion; then add 100g of 2.5% (w / w) polyethyleneimine aqueous solution to the emulsion and react for 2 hours to obtain the emulsion body;

[0015] 150g of tetraethyl orthosilicate and 4g of hydrochloric acid solution with pH=3.0 were mixed to form a mixture. The mixture was then added to the emulsion and reacted at 35℃ for 4 hours. After the reaction was completed, the mixture was washed with water and spray-dried to obtain temperature-controlled capsules.

[0016] Preferably, the modified blending agent is prepared by:

[0017] S01: First, stir boron nitride in a sufficient amount of 5% potassium permanganate solution until homogeneous, then filter and dry it. Then, stir it thoroughly in a sufficient amount of 5% hydrochloric acid solution, then wash it with water, filter it, and dry it to obtain dry boron nitride.

[0018] S02: Dry boron nitride and the modified liquid are ball-milled at a weight ratio of 5:3. After ball milling, the mixture is filtered and dried to obtain the modified modifier.

[0019] The preparation method of the blending and modifying liquid is as follows:

[0020] Mix 2-4 parts by weight of nano-alumina, 1-3 parts by weight of silicon carbide whiskers, 1-2 parts by weight of nano-silica sol and 4-7 parts by weight of lanthanum chloride solution thoroughly to obtain a blended modified solution.

[0021] Preferably, the lanthanum chloride solution has a mass fraction of 2-5%.

[0022] Preferably, the ball milling temperature for the ball milling improvement treatment is 55-60℃, the ball milling time is 1 hour, and the ball milling speed is 450-550 r / min.

[0023] Preferably, the filler additive is prepared by:

[0024] S101: Place carbon nanotubes in an acid solution with a total weight of 4-7 times the carbon nanotubes and stir for 12 hours. Then filter and wash to obtain acid-treated carbon nanotubes.

[0025] Acid-treated carbon nanotubes were dispersed in deionized water at 5-8 times their total weight. Then, potassium permanganate at 15-20% of the total weight of the acid-treated carbon nanotubes was added. The mixture was stirred in the dark, then freeze-dried, and then sintered at 800℃ for 2 hours. Finally, the mixture was acid-washed, filtered, and dried to obtain porous carbon nanotubes.

[0026] S102: Add 2-5 parts by weight of nano-attapulgite, 1-2 parts by weight of silane coupling agent KH550, and 1-3 parts by weight of nano-titanium dioxide to 5-8 parts by weight of sodium citrate solution, stir evenly, and obtain the modified solution.

[0027] Porous carbon nanotubes and modification liquid were stirred at a weight ratio of 2:5. After stirring, the porous carbon nanotube modification liquid was obtained.

[0028] S103: The porous carbon nanotube modification liquid and additives are mixed at a weight ratio of 5:3 and ball-milled at a speed of 1500 r / min for 1 hour. After ball milling, the mixture is filtered and dried to obtain the filler additive.

[0029] Preferably, the acid solution is prepared by mixing 65% concentrated nitric acid and 96% concentrated sulfuric acid in a weight ratio of 1:3. The stirring time in the dark is 10 hours and the stirring speed is 100 r / min. The acid washing is carried out with 5% hydrochloric acid for 1 hour.

[0030] Preferably, the sodium citrate solution has a mass fraction of 2-5%; the stirring temperature for the stirring treatment is 55-60℃, the stirring speed is 550-750 r / min, and the stirring time is 1-2 h.

[0031] Preferably, the additive is prepared by:

[0032] Permacite powder and shell powder were added to a yttrium nitrate solution at a weight ratio of 2:3 to 4-7 times the total weight of the permacite powder. The mixture was then filtered, dried, and calcined at 210-230℃ for 1 hour. After calcination, the mixture was cooled to 55℃ at a rate of 2-5℃ / min to obtain a cooled product. Subsequently, the cooled product, urea solution, and tourmaline powder were ultrasonically treated at a weight ratio of 3:5:1 with an ultrasonic power of 350-400W for 1 hour. After ultrasonication, the mixture was filtered and dried to obtain the additive.

[0033] Preferably, the urea solution has a mass fraction of 2-5%; the yttrium nitrate solution has a mass fraction of 3-6%.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] This invention relates to a knitted fabric made from chitosan fibers blended with nano-silver fibers and polyester fibers to form a first blended yarn, and modified polyester fibers and cotton fibers blended to form a second blended yarn. The knitted fabric is formed by knitting the first and second blended yarns together. The resulting knitted fabric exhibits coordinated improvements in temperature control, breathability, stain resistance, and antibacterial properties, and demonstrates significant performance stability under washing and ultraviolet high-heat conditions. The temperature-controlling capsule is made from a gum arabic aqueous solution combined with paraffin wax, and further modified by adjusting with tetraethyl orthosilicate and hydrochloric acid solution at pH 3.0. This results in a temperature-controlling capsule that can maintain the product temperature at 18-25℃ within the fabric system. The modifier is boron nitride treated with potassium permanganate solution and hydrochloric acid solution to optimize its activity. It is then further improved through ball milling of the modifier liquid. The modifier liquid uses nano-alumina as a matrix, and is further modified by combining with silicon carbide whiskers, nano-silica sol, and lanthanum chloride solution. Through the blending and coordination of raw materials, the resulting modified blending agent improves boron nitride, optimizing the performance stability and performance coordination of modified polyester fibers. In the filler additives, carbon nanotubes are modified to form porous carbon nanotubes, optimizing the system's permeability. Simultaneously, the modified liquid is used for improvement. The modified liquid contains nano-attapulgite, silane coupling agent KH550, nano-titanium dioxide, and sodium citrate solution, and the synergistic effect of the raw materials further enhances the system's permeability and achieves coordinated improvements in temperature control, air permeability, stain resistance, and antibacterial properties. The product's performance stability under washing and ultraviolet high-heat conditions is significantly improved. The additives are made from periclase powder and shell powder treated with yttrium nitrate solution and then calcined. These are then combined with urea solution and tourmaline powder for ultrasonic treatment. Through the blending and coordination of raw materials, the supplementary effect of the additives in the system is enhanced, thereby further improving the product's performance. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to specific examples. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] This embodiment describes a method for preparing a knitted fabric for temperature-controlled underwear, comprising the following steps:

[0038] Step 1: Blend chitosan fiber, nano silver fiber and polyester fiber in a weight ratio of 1:1:2 to form the first blended yarn;

[0039] Step 2: The matrix agent containing the temperature-controlled capsule, the modifier and the filler are mixed at a weight ratio of (11-13):3:2 and fed into a twin-screw extruder for melt extrusion, followed by spinning to obtain modified polyester fibers;

[0040] The matrix agent containing the temperature-controlled capsule is obtained by mixing the temperature-controlled capsule, polyethylene terephthalate, dimethyl terephthalate and polyethylene glycol 2000 in a weight ratio of 8:20:70:15.

[0041] Step 3: Blend the modified polyester fiber and cotton fiber at a weight ratio of 2:3 to form a second blended yarn;

[0042] Step 4: Knit the first blended yarn and the second blended yarn using a circular knitting machine to obtain the knitted fabric for temperature-controlled underwear; wherein the twist coefficient of the first blended yarn is 260 and the twist coefficient of the second blended yarn is 360.

[0043] In this embodiment, the twin-screw extruder has six temperature zones from the feed end to the die head with temperatures of 275°C, 280°C, 285°C, 290°C, 290°C, and 290°C, respectively; the spinning temperature during the spinning process is 280°C.

[0044] The preparation method of the temperature-controlled capsule is as follows:

[0045] Stir 1L of 1.5% (w / w) gum arabic aqueous solution until transparent and homogeneous; heat 141g of paraffin wax to melt, then add it to the gum arabic aqueous solution and emulsify for 20 minutes to obtain an emulsion; then add 100g of 2.5% (w / w) polyethyleneimine aqueous solution to the emulsion and react for 2 hours to obtain the emulsion body;

[0046] 150g of tetraethyl orthosilicate and 4g of hydrochloric acid solution with pH=3.0 were mixed to form a mixture. The mixture was then added to the emulsion and reacted at 35℃ for 4 hours. After the reaction was completed, the mixture was washed with water and spray-dried to obtain temperature-controlled capsules.

[0047] The preparation method of the modified blending agent in this embodiment is as follows:

[0048] S01: First, stir boron nitride in a sufficient amount of 5% potassium permanganate solution until homogeneous, then filter and dry it. Then, stir it thoroughly in a sufficient amount of 5% hydrochloric acid solution, then wash it with water, filter it, and dry it to obtain dry boron nitride.

[0049] S02: Dry boron nitride and the modified liquid are ball-milled at a weight ratio of 5:3. After ball milling, the mixture is filtered and dried to obtain the modified modifier.

[0050] The preparation method of the blending and modifying liquid is as follows:

[0051] Mix 2-4 parts by weight of nano-alumina, 1-3 parts by weight of silicon carbide whiskers, 1-2 parts by weight of nano-silica sol and 4-7 parts by weight of lanthanum chloride solution thoroughly to obtain a blended modified solution.

[0052] The mass fraction of the lanthanum chloride solution in this embodiment is 2-5%.

[0053] In this embodiment, the ball milling temperature for the ball milling improvement treatment is 55-60℃, the ball milling time is 1 hour, and the ball milling speed is 450-550 r / min.

[0054] The preparation method of the filler additive in this embodiment is as follows:

[0055] S101: Place carbon nanotubes in an acid solution with a total weight of 4-7 times the carbon nanotubes and stir for 12 hours. Then filter and wash to obtain acid-treated carbon nanotubes.

[0056] Acid-treated carbon nanotubes were dispersed in deionized water at 5-8 times their total weight. Then, potassium permanganate at 15-20% of the total weight of the acid-treated carbon nanotubes was added. The mixture was stirred in the dark, then freeze-dried, and then sintered at 800℃ for 2 hours. Finally, the mixture was acid-washed, filtered, and dried to obtain porous carbon nanotubes.

[0057] S102: Add 2-5 parts by weight of nano-attapulgite, 1-2 parts by weight of silane coupling agent KH550, and 1-3 parts by weight of nano-titanium dioxide to 5-8 parts by weight of sodium citrate solution, stir evenly, and obtain the modified solution.

[0058] Porous carbon nanotubes and modification liquid were stirred at a weight ratio of 2:5. After stirring, the porous carbon nanotube modification liquid was obtained.

[0059] S103: The porous carbon nanotube modification liquid and additives are mixed at a weight ratio of 5:3 and ball-milled at a speed of 1500 r / min for 1 hour. After ball milling, the mixture is filtered and dried to obtain the filler additive.

[0060] In this embodiment, the acid solution is prepared by mixing 65% concentrated nitric acid and 96% concentrated sulfuric acid in a weight ratio of 1:3. The stirring time in the dark is 10 hours, and the stirring speed is 100 r / min. The acid washing is carried out by washing with 5% hydrochloric acid for 1 hour.

[0061] In this embodiment, the sodium citrate solution has a mass fraction of 2-5%; the stirring temperature is 55-60℃, the stirring speed is 550-750 r / min, and the stirring time is 1-2 h.

[0062] The preparation method of the additive in this embodiment is as follows:

[0063] Permacite powder and shell powder were added to a yttrium nitrate solution at a weight ratio of 2:3 to 4-7 times the total weight of the permacite powder. The mixture was then filtered, dried, and calcined at 210-230℃ for 1 hour. After calcination, the mixture was cooled to 55℃ at a rate of 2-5℃ / min to obtain a cooled product. Subsequently, the cooled product, urea solution, and tourmaline powder were ultrasonically treated at a weight ratio of 3:5:1 with an ultrasonic power of 350-400W for 1 hour. After ultrasonication, the mixture was filtered and dried to obtain the additive.

[0064] In this embodiment, the urea solution has a mass fraction of 2-5%, and the yttrium nitrate solution has a mass fraction of 3-6%.

[0065] Example 1: A method for preparing a knitted fabric for temperature-controlled underwear, comprising the following steps:

[0066] Step 1: Blend chitosan fiber, nano silver fiber and polyester fiber in a weight ratio of 1:1:2 to form the first blended yarn;

[0067] Step 2: The matrix agent containing the temperature-controlled capsule, the modifier and the filler are mixed in a weight ratio of 11:3:2 and fed into a twin-screw extruder for melt extrusion, followed by spinning to obtain modified polyester fibers.

[0068] The matrix agent containing the temperature-controlled capsule is obtained by mixing the temperature-controlled capsule, polyethylene terephthalate, dimethyl terephthalate and polyethylene glycol 2000 in a weight ratio of 8:20:70:15.

[0069] Step 3: Blend the modified polyester fiber and cotton fiber at a weight ratio of 2:3 to form a second blended yarn;

[0070] Step 4: Knit the first blended yarn and the second blended yarn using a circular knitting machine to obtain the knitted fabric for temperature-controlled underwear; wherein the twist coefficient of the first blended yarn is 260 and the twist coefficient of the second blended yarn is 360.

[0071] In this embodiment, the twin-screw extruder has six temperature zones from the feed end to the die head with temperatures of 275°C, 280°C, 285°C, 290°C, 290°C, and 290°C, respectively; the spinning temperature during the spinning process is 280°C.

[0072] The preparation method of the temperature-controlled capsule is as follows:

[0073] Stir 1L of 1.5% (w / w) gum arabic aqueous solution until transparent and homogeneous; heat 141g of paraffin wax to melt, then add it to the gum arabic aqueous solution and emulsify for 20 minutes to obtain an emulsion; then add 100g of 2.5% (w / w) polyethyleneimine aqueous solution to the emulsion and react for 2 hours to obtain the emulsion body;

[0074] 150g of tetraethyl orthosilicate and 4g of hydrochloric acid solution with pH=3.0 were mixed to form a mixture. The mixture was then added to the emulsion and reacted at 35℃ for 4 hours. After the reaction was completed, the mixture was washed with water and spray-dried to obtain temperature-controlled capsules.

[0075] The preparation method of the modified blending agent in this embodiment is as follows:

[0076] S01: First, stir boron nitride in a sufficient amount of 5% potassium permanganate solution until homogeneous, then filter and dry it. Then, stir it thoroughly in a sufficient amount of 5% hydrochloric acid solution, then wash it with water, filter it, and dry it to obtain dry boron nitride.

[0077] S02: Dry boron nitride and the modified liquid are ball-milled at a weight ratio of 5:3. After ball milling, the mixture is filtered and dried to obtain the modified modifier.

[0078] The preparation method of the blending and modifying liquid is as follows:

[0079] Two parts by weight of nano-alumina, one part of silicon carbide whiskers, one part of nano-silica sol, and four parts of lanthanum chloride solution are mixed and stirred thoroughly to obtain a modified solution.

[0080] The lanthanum chloride solution in this embodiment has a mass fraction of 2%.

[0081] In this embodiment, the ball milling temperature for the ball milling improvement treatment is 55°C, the ball milling time is 1 hour, and the ball milling speed is 450 r / min.

[0082] The preparation method of the filler additive in this embodiment is as follows:

[0083] S101: Place carbon nanotubes in an acid solution with a total weight of 4 times the carbon nanotubes and stir for 12 hours. Then filter and wash to obtain acid-treated carbon nanotubes.

[0084] Acid-treated carbon nanotubes were dispersed in deionized water at 5 times their total weight, and then potassium permanganate at 15% of the total weight of the acid-treated carbon nanotubes was added. The mixture was stirred in the dark, then freeze-dried, and then sintered at 800℃ for 2 hours. Finally, the mixture was acid-washed, filtered, and dried to obtain porous carbon nanotubes.

[0085] S102: Add 2 parts by weight of nano-attapulgite clay, 1 part by weight of silane coupling agent KH550 and 1 part by weight of nano-titanium dioxide to 5 parts by weight of sodium citrate solution, stir evenly to obtain modified solution.

[0086] Porous carbon nanotubes and modification liquid were stirred at a weight ratio of 2:5. After stirring, the porous carbon nanotube modification liquid was obtained.

[0087] S103: The porous carbon nanotube modification liquid and additives are mixed at a weight ratio of 5:3 and ball-milled at a speed of 1500 r / min for 1 hour. After ball milling, the mixture is filtered and dried to obtain the filler additive.

[0088] In this embodiment, the acid solution is prepared by mixing 65% concentrated nitric acid and 96% concentrated sulfuric acid in a weight ratio of 1:3. The stirring time in the dark is 10 hours, and the stirring speed is 100 r / min. The acid washing is carried out by washing with 5% hydrochloric acid for 1 hour.

[0089] In this embodiment, the sodium citrate solution has a mass fraction of 2%; the stirring temperature is 55°C, the stirring speed is 550 r / min, and the stirring time is 1 h.

[0090] The preparation method of the additive in this embodiment is as follows:

[0091] Permacite powder and shell powder were added to a yttrium nitrate solution at a weight ratio of 2:3 to 4 times the total weight of the permacite powder. The mixture was then filtered, dried, and calcined at 210°C for 1 hour. After calcination, the mixture was cooled to 55°C at a rate of 2°C / min to obtain a cooled product. Subsequently, the cooled product, urea solution, and tourmaline powder were ultrasonically treated at a weight ratio of 3:5:1 with an ultrasonic power of 350W for 1 hour. After ultrasonication, the mixture was filtered and dried to obtain the additive.

[0092] In this embodiment, the urea solution has a mass fraction of 2% and the yttrium nitrate solution has a mass fraction of 3%.

[0093] Example 2: A method for preparing a knitted fabric for temperature-controlled underwear, comprising the following steps:

[0094] Step 1: Blend chitosan fiber, nano silver fiber and polyester fiber in a weight ratio of 1:1:2 to form the first blended yarn;

[0095] Step 2: The matrix agent containing the temperature-controlled capsule, the modifier and filler are mixed in a weight ratio of 13:3:2 and fed into a twin-screw extruder for melt extrusion, followed by spinning to obtain modified polyester fibers.

[0096] The matrix agent containing the temperature-controlled capsule is obtained by mixing the temperature-controlled capsule, polyethylene terephthalate, dimethyl terephthalate and polyethylene glycol 2000 in a weight ratio of 8:20:70:15.

[0097] Step 3: Blend the modified polyester fiber and cotton fiber at a weight ratio of 2:3 to form a second blended yarn;

[0098] Step 4: Knit the first blended yarn and the second blended yarn using a circular knitting machine to obtain the knitted fabric for temperature-controlled underwear; wherein the twist coefficient of the first blended yarn is 260 and the twist coefficient of the second blended yarn is 360.

[0099] In this embodiment, the twin-screw extruder has six temperature zones from the feed end to the die head with temperatures of 275°C, 280°C, 285°C, 290°C, 290°C, and 290°C, respectively; the spinning temperature during the spinning process is 280°C.

[0100] The preparation method of the temperature-controlled capsule is as follows:

[0101] Stir 1L of 1.5% (w / w) gum arabic aqueous solution until transparent and homogeneous; heat 141g of paraffin wax to melt, then add it to the gum arabic aqueous solution and emulsify for 20 minutes to obtain an emulsion; then add 100g of 2.5% (w / w) polyethyleneimine aqueous solution to the emulsion and react for 2 hours to obtain the emulsion body;

[0102] 150g of tetraethyl orthosilicate and 4g of hydrochloric acid solution with pH=3.0 were mixed to form a mixture. The mixture was then added to the emulsion and reacted at 35℃ for 4 hours. After the reaction was completed, the mixture was washed with water and spray-dried to obtain temperature-controlled capsules.

[0103] The preparation method of the modified blending agent in this embodiment is as follows:

[0104] S01: First, stir boron nitride in a sufficient amount of 5% potassium permanganate solution until homogeneous, then filter and dry it. Then, stir it thoroughly in a sufficient amount of 5% hydrochloric acid solution, then wash it with water, filter it, and dry it to obtain dry boron nitride.

[0105] S02: Dry boron nitride and the modified liquid are ball-milled at a weight ratio of 5:3. After ball milling, the mixture is filtered and dried to obtain the modified modifier.

[0106] The preparation method of the blending and modifying liquid is as follows:

[0107] By weight, 4 parts of nano-alumina, 3 parts of silicon carbide whiskers, 2 parts of nano-silica sol and 7 parts of lanthanum chloride solution are mixed and stirred thoroughly to obtain a blended modified liquid.

[0108] The lanthanum chloride solution in this embodiment has a mass fraction of 5%.

[0109] In this embodiment, the ball milling temperature for the ball milling improvement treatment is 60°C, the ball milling time is 1 hour, and the ball milling speed is 550 r / min.

[0110] The preparation method of the filler additive in this embodiment is as follows:

[0111] S101: Place carbon nanotubes in an acid solution with a total weight of 7 times the carbon nanotubes and stir for 12 hours. Then filter and wash to obtain acid-treated carbon nanotubes.

[0112] Acid-treated carbon nanotubes were dispersed in deionized water at 8 times their total weight of acid-treated carbon nanotubes. Then, potassium permanganate at 20% of the total weight of acid-treated carbon nanotubes was added. The mixture was stirred in the dark, then freeze-dried, and then sintered at 800℃ for 2 hours. Finally, the mixture was acid-washed, filtered, and dried to obtain porous carbon nanotubes.

[0113] S102: Add 5 parts by weight of nano-attapulgite clay, 2 parts by weight of silane coupling agent KH550 and 3 parts by weight of nano-titanium dioxide to 8 parts by weight of sodium citrate solution, stir evenly to obtain modified solution.

[0114] Porous carbon nanotubes and modification liquid were stirred at a weight ratio of 2:5. After stirring, the porous carbon nanotube modification liquid was obtained.

[0115] S103: The porous carbon nanotube modification liquid and additives are mixed at a weight ratio of 5:3 and ball-milled at a speed of 1500 r / min for 1 hour. After ball milling, the mixture is filtered and dried to obtain the filler additive.

[0116] In this embodiment, the acid solution is prepared by mixing 65% concentrated nitric acid and 96% concentrated sulfuric acid in a weight ratio of 1:3. The stirring time in the dark is 10 hours, and the stirring speed is 100 r / min. The acid washing is carried out by washing with 5% hydrochloric acid for 1 hour.

[0117] In this embodiment, the sodium citrate solution has a mass fraction of 5%; the stirring temperature is 60°C, the stirring speed is 750 r / min, and the stirring time is 2 h.

[0118] The preparation method of the additive in this embodiment is as follows:

[0119] Permacite powder and shell powder were added to a yttrium nitrate solution at a weight ratio of 2:3 to 7 times the total weight of the permacite powder. The mixture was then filtered, dried, and calcined at 230°C for 1 hour. After calcination, the mixture was cooled to 55°C at a rate of 5°C / min to obtain a cooled product. Subsequently, the cooled product, urea solution, and tourmaline powder were ultrasonically treated at a weight ratio of 3:5:1 with an ultrasonic power of 400W for 1 hour. After ultrasonication, the mixture was filtered and dried to obtain the additive.

[0120] In this embodiment, the urea solution has a mass fraction of 5%, and the yttrium nitrate solution has a mass fraction of 6%.

[0121] Example 3: A method for preparing a knitted fabric for temperature-controlled underwear, comprising the following steps:

[0122] Step 1: Blend chitosan fiber, nano silver fiber and polyester fiber in a weight ratio of 1:1:2 to form the first blended yarn;

[0123] Step 2: The matrix agent containing the temperature-controlled capsule, the modifier and filler are mixed in a weight ratio of 12:3:2 and fed into a twin-screw extruder for melt extrusion, followed by spinning to obtain modified polyester fibers.

[0124] The matrix agent containing the temperature-controlled capsule is obtained by mixing the temperature-controlled capsule, polyethylene terephthalate, dimethyl terephthalate and polyethylene glycol 2000 in a weight ratio of 8:20:70:15.

[0125] Step 3: Blend the modified polyester fiber and cotton fiber at a weight ratio of 2:3 to form a second blended yarn;

[0126] Step 4: Knit the first blended yarn and the second blended yarn using a circular knitting machine to obtain the knitted fabric for temperature-controlled underwear; wherein the twist coefficient of the first blended yarn is 260 and the twist coefficient of the second blended yarn is 360.

[0127] In this embodiment, the twin-screw extruder has six temperature zones from the feed end to the die head with temperatures of 275°C, 280°C, 285°C, 290°C, 290°C, and 290°C, respectively; the spinning temperature during the spinning process is 280°C.

[0128] The preparation method of the temperature-controlled capsule is as follows:

[0129] Stir 1L of 1.5% (w / w) gum arabic aqueous solution until transparent and homogeneous; heat 141g of paraffin wax to melt, then add it to the gum arabic aqueous solution and emulsify for 20 minutes to obtain an emulsion; then add 100g of 2.5% (w / w) polyethyleneimine aqueous solution to the emulsion and react for 2 hours to obtain the emulsion body;

[0130] 150g of tetraethyl orthosilicate and 4g of hydrochloric acid solution with pH=3.0 were mixed to form a mixture. The mixture was then added to the emulsion and reacted at 35℃ for 4 hours. After the reaction was completed, the mixture was washed with water and spray-dried to obtain temperature-controlled capsules.

[0131] The preparation method of the modified blending agent in this embodiment is as follows:

[0132] S01: First, stir boron nitride in a sufficient amount of 5% potassium permanganate solution until homogeneous, then filter and dry it. Then, stir it thoroughly in a sufficient amount of 5% hydrochloric acid solution, then wash it with water, filter it, and dry it to obtain dry boron nitride.

[0133] S02: Dry boron nitride and the modified liquid are ball-milled at a weight ratio of 5:3. After ball milling, the mixture is filtered and dried to obtain the modified modifier.

[0134] The preparation method of the blending and modifying liquid is as follows:

[0135] The following mixtures were prepared by mixing 3 parts by weight of nano-alumina, 2 parts by weight of silicon carbide whiskers, 1.5 parts by weight of nano-silica sol and 5.5 parts by weight of lanthanum chloride solution until fully stirred to obtain a modified solution.

[0136] The lanthanum chloride solution in this embodiment has a mass fraction of 3.5%.

[0137] In this embodiment, the ball milling temperature for the improved ball milling process is 57.5℃, the ball milling time is 1 hour, and the ball milling speed is 500 r / min.

[0138] The preparation method of the filler additive in this embodiment is as follows:

[0139] S101: Place carbon nanotubes in an acid solution with a total weight of 5.5 times the carbon nanotubes and stir for 12 hours. Then filter and wash to obtain acid-treated carbon nanotubes.

[0140] Acid-treated carbon nanotubes were dispersed in deionized water at 6.5 times their total weight, and then potassium permanganate at 17.5% of the total weight of the acid-treated carbon nanotubes was added. The mixture was stirred in the dark, then freeze-dried, and then sintered at 800℃ for 2 hours. Finally, the mixture was acid-washed, filtered, and dried to obtain porous carbon nanotubes.

[0141] S102: Add 3.5 parts by weight of nano-attapulgite clay, 1.5 parts by weight of silane coupling agent KH550 and 2 parts by weight of nano-titanium dioxide to 6.5 parts by weight of sodium citrate solution, stir evenly to obtain modified solution;

[0142] Porous carbon nanotubes and modification liquid were stirred at a weight ratio of 2:5. After stirring, the porous carbon nanotube modification liquid was obtained.

[0143] S103: The porous carbon nanotube modification liquid and additives are mixed at a weight ratio of 5:3 and ball-milled at a speed of 1500 r / min for 1 hour. After ball milling, the mixture is filtered and dried to obtain the filler additive.

[0144] In this embodiment, the acid solution is prepared by mixing 65% concentrated nitric acid and 96% concentrated sulfuric acid in a weight ratio of 1:3. The stirring time in the dark is 10 hours, and the stirring speed is 100 r / min. The acid washing is carried out by washing with 5% hydrochloric acid for 1 hour.

[0145] In this embodiment, the sodium citrate solution has a mass fraction of 3.5%; the stirring temperature for the stirring treatment is 57.5℃, the stirring speed is 600 r / min, and the stirring time is 1.5 h.

[0146] The preparation method of the additive in this embodiment is as follows:

[0147] Permacite powder and shell powder were added to a yttrium nitrate solution at a weight ratio of 2:3 to 5.5 times the total weight of the permacite powder. The mixture was then filtered, dried, and calcined at 220°C for 1 hour. After calcination, the mixture was cooled to 55°C at a rate of 3.5°C / min to obtain a cooled product. Subsequently, the cooled product, urea solution, and tourmaline powder were ultrasonically treated at a weight ratio of 3:5:1 with an ultrasonic power of 375W for 1 hour. After ultrasonication, the mixture was filtered and dried to obtain the additive.

[0148] In this embodiment, the urea solution has a mass fraction of 3.5% and the yttrium nitrate solution has a mass fraction of 4.5%.

[0149] Comparative Example 1:

[0150] Unlike Example 3, no modifier was added to the modified polyester fiber.

[0151] Comparative Example 2:

[0152] Unlike Example 3, no blending and modifying liquid treatment was used in the preparation of the modified blending agent.

[0153] Comparative Example 3:

[0154] Unlike Example 3, no nano-alumina or silicon carbide whiskers were added to the blending and modification liquid.

[0155] Comparative Example 4:

[0156] Unlike Example 3, no dried boron nitride was added during the preparation of the modified blending agent.

[0157] Comparative Example 5:

[0158] Unlike Example 3, no filler additives were added to the modified polyester fiber.

[0159] Comparative Example 6:

[0160] Unlike Example 3, the porous carbon nanotubes prepared by S101 in the filler additive are directly replaced by carbon nanotube raw materials.

[0161] Comparative Example 7:

[0162] Unlike Example 3, no modification liquid treatment was used in the preparation of the porous carbon nanotube modification liquid.

[0163] Comparative Example 8:

[0164] Unlike Example 3, no nano-attapulgite clay and nano-titanium dioxide were added to the modified liquid.

[0165] Comparative Example 9:

[0166] Unlike Example 3, no additives were added during the preparation of the filler.

[0167] Temperature control test: After placing the products of Examples 1-3 at an ambient temperature of 5°C for 2 hours, the product temperature was measured to reach 18°C. After placing the products at 40°C for 2 hours, the product temperature was measured to reach 25°C. The products of Examples 1-3 can achieve a temperature control effect of 18-25°C.

[0168] The products of Examples 1-3 and Comparative Examples 1-9 were tested for their antifouling, antibacterial, and breathability under normal conditions and under water washing and ultraviolet high heat conditions. The water washing and ultraviolet high heat conditions involved placing the products in a 200W / m² environment. 2 The samples were treated with ultraviolet light at 70℃ for 48 hours, and then washed with water 10 times. The test results are shown in Table 1.

[0169] Table 1. Performance test results of products from Examples 1-3 and Comparative Examples 1-9:

[0170]

[0171] As can be seen from Comparative Examples 1-9 and Examples 1-3, the product of Example 3 has excellent anti-fouling, antibacterial and breathable properties, good temperature control performance, and significant performance stability under water washing and ultraviolet high heat conditions.

[0172] As can be seen from Comparative Examples 1-9 and Example 3, the performance of the modified polyester fiber produced by the present invention showed a significant deterioration trend when no modifier or filler was added. Furthermore, the performance of the product also deteriorated when no modifier was prepared using a modifying liquid, when nano-alumina or silicon carbide whiskers were added to the modifying liquid, or when dried boron nitride was not added. The modified modifier obtained using the specific method of the present invention showed a significant improvement in product performance. Moreover, the product performance was most significantly improved when both the modified modifier and filler were used in the specific process of the present invention.

[0173] Meanwhile, the performance of the modified polyester fiber showed varying degrees of deterioration, as did the following: no filler additives were added; the porous carbon nanotubes prepared by S101 in the filler additives were directly replaced by carbon nanotube raw materials; the modified liquid was not used in the preparation of the porous carbon nanotube modification liquid; nano-attapulgite and nano-titanium dioxide were not added to the modified liquid; and no additives were added in the preparation of the filler additives. In particular, the performance of the product obtained by using the modified liquid obtained by the specific method of this invention, combined with additives and the filler additives obtained by the porous carbon nanotubes prepared by S101, was the most significant. Other methods were not as effective as those of this invention.

[0174] This invention further explores the product performance through the preparation of additives.

[0175] Experimental Example 1:

[0176] Same as Example 3, except that no cooling product was added during the preparation of the additive.

[0177] Experimental Example 2:

[0178] Same as Example 3, except that tourmaline powder was not added during the preparation of the additive.

[0179] Experimental Example 3:

[0180] Same as Example 3, except that water was used instead of urea solution in the preparation of the additive.

[0181] Experiment Example 4:

[0182] Same as Example 3, except that periclase powder was not added during the preparation of the cooled product.

[0183] Experimental Example 5:

[0184] Same as Example 3, except that no shell powder was added during the preparation of the cooled product.

[0185] Experimental Example 6:

[0186] Same as Example 3, except that water was used instead of yttrium nitrate solution.

[0187] The same tests were performed on products from Experiment Examples 1 to 6, and the test results are shown in Table 2.

[0188] Table 2. Performance test results of products in Experiments 1-6:

[0189]

[0190] As can be seen from Experiments 1-6, the performance of the additives deteriorated significantly when the cooling product was not added during preparation. The performance also deteriorated to varying degrees when tourmaline powder was not added, or when water was used instead of urea solution. Similarly, the performance of the cooling product deteriorated when periclase powder, shell powder, or yttrium nitrate solution was not added. Only the cooling product prepared using the method of this invention, combined with urea solution and tourmaline powder, showed the most significant performance improvement. Other methods did not produce the same significant performance improvement as the method described in this invention.

[0191] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

[0192] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A method of making a knitted fabric for temperature- controlled underwear, characterized in that, Comprise the following steps: Step one: the chitosan fiber, nanometer silver fiber and polyester fiber are blended according to the weight ratio 1:1:2 to form a first blended yarn; Step two: the base agent containing temperature control capsules, modified blending agent and filler auxiliary agent are mixed according to the weight ratio (11-13):3:2, then are sent into a double screw extruder for melt extrusion, and then are subjected to spinning treatment to obtain modified polyester fibers; The base agent containing temperature control capsules is obtained by mixing temperature control capsules, polyethylene terephthalate, dimethyl terephthalate and polyethylene glycol 2000 according to the weight ratio 8:20:70:15; Step three: the modified polyester fibers and cotton fibers are blended according to the weight ratio 2:3 to form a second blended yarn; Step four: the first blended yarn and the second blended yarn are knitted by a circular knitting machine to obtain a knitted fabric for temperature-controllable underwear; wherein the twist factor of the first blended yarn is 260, and the twist factor of the second blended yarn is 360; The temperature of the six temperature zones of the double screw extruder from the feeding end to the head is 275℃, 280℃, 285℃, 290℃, 290℃ and 290℃ respectively; the spinning temperature of the spinning treatment is 280℃; The preparation method of the temperature control capsules is as follows: 1L of 1.5% arabic gum aqueous solution is stirred until transparent and uniform; 141g of paraffin is heated and melted, then added to the arabic gum aqueous solution, emulsified for 20min to obtain an emulsion; then 100g of 2.5% polyethyleneimine aqueous solution is added to the emulsion, and reacted for 2h to obtain a milk material; 150g of tetraethyl orthosilicate and 4g of pH=3.0 hydrochloric acid solution are mixed to form a mixed solution, then the mixed solution is added to the milk material, and reacted at 35℃ for 4h; after the reaction is completed, water washing and spray drying are performed to obtain the temperature control capsules; The preparation method of the modified blending agent is as follows: S01: the boron nitride is first stirred uniformly in sufficient 5% potassium permanganate solution, then filtered and dried, and then stirred fully in sufficient 5% hydrochloric acid solution, then washed with water, filtered and dried to obtain dry boron nitride; S02: the dry boron nitride and the blending modification liquid are ball milled according to the weight ratio 5:3, then filtered and dried to obtain the modified blending agent; The preparation method of the blending modification liquid is as follows: 2-4 parts of nano alumina, 1-3 parts of silicon carbide whiskers, 1-2 parts of nano silicon sol and 4-7 parts of lanthanum chloride solution are fully blended and stirred to obtain the blending modification liquid; The preparation method of the filler auxiliary agent is as follows: S101: the carbon nanotubes are stirred in an acid solution with 4-7 times the total weight of the carbon nanotubes for 12h, then filtered and washed to obtain acid-treated carbon nanotubes; The acid-treated carbon nanotubes are dispersed in deionized water with 5-8 times the total weight of the acid-treated carbon nanotubes, then 15-20% of the total weight of the acid-treated carbon nanotubes of potassium permanganate is added thereto, stirred in the dark, then freeze-dried, sintered at 800℃ for 2h, and finally washed with acid, filtered and dried to obtain porous carbon nanotubes; S102: 2-5 parts of nano attapulgite, 1-2 parts of silane coupling agent KH550, 1-3 parts of nano titanium dioxide are added into 5-8 parts of sodium citrate solution by weight parts, and stirred uniformly to obtain a modified liquid; The porous carbon nanotube and the modified liquid are stirred and treated according to a weight ratio of 2:5, and after stirring, a porous carbon nanotube modified liquid is obtained; S103: The porous carbon nanotube modified liquid and the additive are mixed and ball milled according to a weight ratio of 5:3, the ball milling speed is 1500 r / min, the ball milling time is 1 h, after ball milling, suction filtration and drying are performed to obtain a filler additive; The additive is prepared by: The periclase powder and the shell powder are added into a yttrium nitrate solution with a weight ratio of 2:3, the yttrium nitrate solution is 4-7 times the total weight of the periclase powder, then suction filtration and drying are performed, and then calcination is performed at 210-230°C for 1 h, after calcination, the cooling product is obtained by cooling at a rate of 2-5°C / min to 55°C, then the cooling product, a urea solution and tourmaline powder are ultrasonically treated according to a weight ratio of 3:5:1, the ultrasonic power is 350-400W, the ultrasonic treatment time is 1 h, after ultrasonic treatment, suction filtration and drying are performed to obtain the additive.

2. A method of making a temperature-controllable knitted fabric for use in an undergarment according to claim 1, characterized in that, The mass fraction of the lanthanum chloride solution is 2-5%.

3. A method of making a temperature-controllable knitted fabric for use in an undergarment according to claim 1, characterized in that, The ball milling temperature of the ball milling improvement treatment is 55-60°C, the ball milling time is 1 h, and the ball milling speed is 450-550 r / min.

4. A method of making a temperature-controllable knitted fabric for use in an undergarment according to claim 1, characterized in that, The acid solution is prepared by mixing concentrated nitric acid with a mass concentration of 65% and concentrated sulfuric acid with a mass concentration of 96% according to a weight ratio of 1:3, the light-shielded stirring time is 10 h, and the stirring speed is 100 r / min; the pickling is performed by using 5% hydrochloric acid for 1 h.

5. A method of making a temperature-controllable knitted fabric for use in an undergarment according to claim 1, characterized in that, The mass fraction of the sodium citrate solution is 2-5%; the stirring temperature of the stirring treatment is 55-60°C, the stirring speed is 550-750 r / min, and the stirring time is 1-2 h.

6. A method of making a temperature-controllable knitted fabric for use in an undergarment according to claim 1, characterized in that, The mass fraction of the urea solution is 2-5%; the mass fraction of the yttrium nitrate solution is 3-6%.

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