Elastic knitted fabric for sportswear and preparation method thereof

Abstract

The present invention relates to the technical field of elastic knitted fabrics, and in particular to an elastic knitted fabric for sportswear and a preparation method thereof, comprising the following steps: 45-55 parts of modal fiber and 15-20 parts of modified spandex fiber are blended to form a first spinning body, and 35-45 parts of polyolefin elastic fiber are used as a second spinning body. The elastic knitted fabric of the present invention adopts modal fiber and modified spandex fiber to blend to form a first spinning body, and then cooperates with a second spinning body of polyolefin elastic fiber, weaves through a weft knitting circular machine, and then shapes, and finally improves the elasticity of the elastic knitted fabric by vacuum treatment with a treatment agent, so that the elastic performance, moisture permeability and anti-fouling performance of the obtained elastic knitted fabric are coordinated and improved, and the product has excellent performance stability under water washing and light weathering conditions.

Description

Technical Field

[0001] The invention relates to the technical field of elastic knitted fabrics, and in particular to an elastic knitted fabric for sportswear and a preparation method thereof. Background Art

[0002] Knitted fabric is a fabric made by bending yarn into loops and interlacing them with knitting needles. It is divided into warp knitted fabric and weft knitted fabric. Knitted fabrics are soft, moisture-absorbent, breathable, perspiration-wicking and warm-keeping. Most of them have excellent elasticity and extensibility. Compared with woven fabrics, they have high output and are suitable for small batch production. Knitted clothing is comfortable to wear, fits the body, has no tightness, and can fully reflect the curves of the human body.

[0003] Existing sportswear knitted fabrics have poor elastic properties. At the same time, the elastic properties of the product are difficult to coordinate and improve with the moisture permeability and anti-fouling properties. In addition, after the product is washed many times and subjected to light and weathering conditions, the product stability deteriorates, which limits the product's use efficiency. Summary of the invention

[0004] In view of the defects of the prior art, the object of the present invention is to provide a stretch knitted fabric for sportswear and a preparation method thereof, so as to solve the problems raised in the above background technology.

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

[0006] The present invention provides a method for preparing a stretch knitted fabric for sportswear, comprising the following steps:

[0007] Step 1: By weight, 45-55 parts of modal fiber and 15-20 parts of modified spandex fiber are blended to form a first spinning body, and 35-45 parts of polyolefin elastic fiber are blended to form a second spinning body;

[0008] Step 2: Weaving the first spinning body and the second spinning body into a cloth body by using a weft knitting circular machine, and subjecting the cloth body to a shaping treatment at 120° C. and a shaping speed of 20 m / min to obtain a shaped cloth body;

[0009] Step 3: Immerse the shaped fabric into a sufficient amount of treatment agent and perform vacuum treatment. After the treatment, dry it at 55-60° C. for 48 hours to obtain a stretch knitted fabric for sportswear.

[0010] Preferably, the linear density of the polyolefin elastic fiber is 40-50D; the count of the first spinning body is 60-70S / 1;

[0011] The vacuum improvement treatment has an air pressure of 65-70 KPa, a temperature of 70-75° C., and a treatment time of 2-5 h.

[0012] Preferably, the preparation method of the modified spandex fiber is:

[0013] S01: Preparation of mica and silicon nitride agent:

[0014] S011: heat-treating the nano mica powder at 320-330°C for 10-15 minutes, cooling it to 150°C at a rate of 2-5°C / min, keeping it at that temperature for 10 minutes, and then air-cooling it to room temperature to obtain heat-treated nano mica powder;

[0015] S012: Mix the heat-treated nano-mica powder and the silicon nitride liquid in a weight ratio of 5:3 and perform ball milling at a ball milling speed of 1500 r / min for 1 hour. After the ball milling is completed, wash with water, filter and dry to obtain a mica-blended silicon nitride agent;

[0016] S02: According to weight, 5-8 parts of mica, silicon nitride agent, 2-4 parts of sodium carboxymethyl cellulose, and 1-3 parts of stearic acid are blended and added to 8-12 parts of sodium citrate solution, and then 2-3 parts of lanthanum chloride solution are added, and the blending is ball-milled at a ball-milling speed of 1000r / min for 2h. After sufficient ball-milling, the modified additive is filtered and dried to obtain;

[0017] S03: By weight, 45-50 parts of polyurethane elastomer, 10-15 parts of POE grafted maleic anhydride, 3-5 parts of silane coupling agent KH560 and 5-9 parts of modified additives are blended and stirred to obtain a spindle, and then the spindle is melt-spun at 180-185° C. to obtain modified spandex fiber.

[0018] Modified spandex fiber is obtained by spinning polyurethane elastomer, POE grafted maleic anhydride, silane coupling agent KH560 and modified additives. By adding modified additives, the role of spandex fiber in knitted fabrics is optimized, the elasticity, moisture permeability and anti-fouling properties of knitted fabrics are improved, and the performance stability of the products is optimized;

[0019] This is because the mica-adjusted silicon nitride agent in the modified additive is improved by blending with sodium methylcellulose, stearic acid, sodium citrate solution and lanthanum chloride solution, so that the mica-adjusted silicon nitride agent is better matched in the modified spandex fiber, and the mica-adjusted silicon nitride agent is first heat-treated at 320-330°C for 10-15min through nano-mica powder, and then cooled to 150°C at a rate of 2-5°C / min, and kept warm for 10min. The heat treatment process is used to enhance the interlayer spacing of the nano-mica powder, optimize the matching effect of the nano-mica powder and the silicon nitride liquid, so that the silicon nitride liquid is better mixed with the mica powder, interspersed in the reinforcement system, and enhance the performance effect of the system;

[0020] Silicon nitride liquid uses silicon nitride powder and nano-titanium dioxide as the base material, and is blended by adding dopamine hydrochloride solution, cerium nitrate solution and sodium lignin sulfonate to optimize the coordination effect of silicon nitride liquid and nano-mica powder, thereby enhancing the performance stability of the system;

[0021] Preferably, the polyurethane elastomer is TPU German Bayer 255 type; the grafting rate of POE grafted with maleic anhydride is 15-17%;

[0022] The mass fraction of the sodium citrate solution is 3-6%; the mass fraction of the lanthanum chloride solution is 2-5%.

[0023] Preferably, the silicon nitride liquid comprises the following raw materials in parts by weight:

[0024] 3-5 parts of silicon nitride powder, 3-5 parts of dopamine hydrochloride solution, 2-5 parts of cerium nitrate solution, 2-3 parts of sodium lignin sulfonate and 1-2 parts of nano titanium dioxide.

[0025] Preferably, the mass fraction of the dopamine hydrochloride solution is 2-5%; the mass fraction of the cerium nitrate solution is 3-6%.

[0026] Preferably, the preparation method of the treating agent is:

[0027] S101: stirring and mixing hydroxyapatite in a sufficient amount of sodium dodecyl sulfate solution to obtain hydroxyapatite liquid;

[0028] S102: 4-7 parts of silicon carbide whiskers, 1-3 parts of silane coupling agent KH550, 2-5 parts of chitosan solution and 2-4 parts of silicon powder are fully blended by weight to obtain a whisker solution;

[0029] S103: ultrasonically treat the hydroxyapatite liquid and the whisker liquid in a weight ratio of 2:5, and then terminate the ultrasonic treatment to obtain a treatment agent.

[0030] Preferably, the mass fraction of the sodium dodecyl sulfate solution is 4-7%; the mass fraction of the chitosan solution is 2-5%.

[0031] Preferably, the ultrasonic power of the ultrasonic treatment is 400-500W, and the ultrasonic time is 20-30min.

[0032] The hydroxyapatite in the treating agent is treated with sodium dodecyl sulfate solution to enhance the dispersion and activity of hydroxyapatite, while the silicon carbide whiskers are blended with silane coupling agent KH550, chitosan solution and silicon micropowder, with whisker-shaped silicon carbide whiskers as the matrix. The raw materials in the whisker liquid complement each other, and the hydroxyapatite has a point adsorption effect, so as to better coordinate the whisker system, and then the cloth body can be better improved by the vacuum of the treating agent, thereby optimizing the performance of the stretch knitted fabric.

[0033] The present invention also provides a stretch knitted fabric for sportswear, which is prepared by the preparation method of the stretch knitted fabric for sportswear.

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

[0035] The elastic knitted fabric of the present invention adopts modal fiber and modified spandex fiber to form a first spinning body, which is then matched with a second spinning body of polyolefin elastic fiber, woven by a weft knitting circular machine, shaped, and finally vacuum treated with a treating agent. The elastic performance, moisture permeability and anti-fouling performance of the obtained elastic knitted fabric are coordinated and improved, and the product has excellent performance stability under water washing and light weathering conditions. DETAILED DESCRIPTION

[0036] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] A method for preparing a stretch knitted fabric for sportswear in this embodiment comprises the following steps:

[0038] Step 1: By weight, 45-55 parts of modal fiber and 15-20 parts of modified spandex fiber are blended to form a first spinning body, and 35-45 parts of polyolefin elastic fiber are blended to form a second spinning body;

[0039] Step 2: Weaving the first spinning body and the second spinning body into a cloth body by using a weft knitting circular machine, and subjecting the cloth body to a shaping treatment at 120° C. and a shaping speed of 20 m / min to obtain a shaped cloth body;

[0040] Step 3: Immerse the shaped fabric into a sufficient amount of treatment agent and perform vacuum treatment. After the treatment, dry it at 55-60° C. for 48 hours to obtain a stretch knitted fabric for sportswear.

[0041] The linear density of the polyolefin elastic fiber of this embodiment is 40-50D; the count of the first spinning body is 60-70S / 1;

[0042] The vacuum improvement treatment has an air pressure of 65-70 KPa, a temperature of 70-75° C., and a treatment time of 2-5 h.

[0043] The preparation method of the modified spandex fiber of this embodiment is:

[0044] S01: Preparation of mica and silicon nitride agent:

[0045] S011: heat-treating the nano mica powder at 320-330°C for 10-15 minutes, cooling it to 150°C at a rate of 2-5°C / min, keeping it at that temperature for 10 minutes, and then air-cooling it to room temperature to obtain heat-treated nano mica powder;

[0046] S012: Mix the heat-treated nano-mica powder and the silicon nitride liquid in a weight ratio of 5:3 and perform ball milling at a ball milling speed of 1500 r / min for 1 hour. After the ball milling is completed, wash with water, filter and dry to obtain a mica-blended silicon nitride agent;

[0047] S02: According to weight, 5-8 parts of mica, silicon nitride agent, 2-4 parts of sodium carboxymethyl cellulose, and 1-3 parts of stearic acid are blended and added to 8-12 parts of sodium citrate solution, and then 2-3 parts of lanthanum chloride solution are added, and the blending is ball-milled at a ball-milling speed of 1000r / min for 2h. After sufficient ball-milling, the modified additive is filtered and dried to obtain;

[0048] S03: By weight, 45-50 parts of polyurethane elastomer, 10-15 parts of POE grafted maleic anhydride, 3-5 parts of silane coupling agent KH560 and 5-9 parts of modified additives are blended and stirred to obtain a spindle, and then the spindle is melt-spun at 180-185° C. to obtain modified spandex fiber.

[0049] The polyurethane elastomer in this embodiment is TPU German Bayer 255 type; the grafting rate of POE grafted with maleic anhydride is 15-17%;

[0050] The mass fraction of the sodium citrate solution is 3-6%; the mass fraction of the lanthanum chloride solution is 2-5%.

[0051] The silicon nitride solution of this embodiment includes the following raw materials in parts by weight:

[0052] 3-5 parts of silicon nitride powder, 3-5 parts of dopamine hydrochloride solution, 2-5 parts of cerium nitrate solution, 2-3 parts of sodium lignin sulfonate and 1-2 parts of nano titanium dioxide.

[0053] The mass fraction of the dopamine hydrochloride solution in this embodiment is 2-5%; the mass fraction of the cerium nitrate solution is 3-6%.

[0054] The preparation method of the treatment agent of this embodiment is:

[0055] S101: stirring and mixing hydroxyapatite in a sufficient amount of sodium dodecyl sulfate solution to obtain hydroxyapatite liquid;

[0056] S102: 4-7 parts of silicon carbide whiskers, 1-3 parts of silane coupling agent KH550, 2-5 parts of chitosan solution and 2-4 parts of silicon powder are fully blended by weight to obtain a whisker solution;

[0057] S103: ultrasonically treat the hydroxyapatite liquid and the whisker liquid in a weight ratio of 2:5, and then terminate the ultrasonic treatment to obtain a treatment agent.

[0058] The mass fraction of the sodium dodecyl sulfate solution in this embodiment is 4-7%; the mass fraction of the chitosan solution is 2-5%.

[0059] The ultrasonic power of the ultrasonic treatment in this embodiment is 400-500W, and the ultrasonic time is 20-30min.

[0060] The elastic knitted fabric for sportswear of the present embodiment is prepared by the above-mentioned method for preparing the elastic knitted fabric for sportswear.

[0061] Embodiment 1: A method for preparing a stretch knitted fabric for sportswear, comprising the following steps:

[0062] Step 1: By weight, 45 parts of modal fiber and 15 parts of modified spandex fiber are blended to form a first spinning body, and 35 parts of polyolefin elastic fiber are used as a second spinning body;

[0063] Step 2: Weaving the first spinning body and the second spinning body into a cloth body by using a weft knitting circular machine, and subjecting the cloth body to a shaping treatment at 120° C. and a shaping speed of 20 m / min to obtain a shaped cloth body;

[0064] Step 3: Immerse the shaped fabric into a sufficient amount of treatment agent and perform vacuum treatment. After the treatment, dry it at 55° C. for 48 hours to obtain a stretch knitted fabric for sportswear.

[0065] The linear density of the polyolefin elastic fiber of this embodiment is 40D; the count of the first spinning body is 60S / 1;

[0066] The vacuum improvement treatment has an air pressure of 65 KPa, a temperature of 705° C., and a treatment time of 2 h.

[0067] The preparation method of the modified spandex fiber of this embodiment is:

[0068] S01: Preparation of mica and silicon nitride agent:

[0069] S011: heat-treating the nano-mica powder at 320° C. for 10 min, cooling it to 150° C. at a rate of 2° C. / min, keeping the temperature for 10 min, and then air-cooling it to room temperature to obtain heat-treated nano-mica powder;

[0070] S012: Mix the heat-treated nano-mica powder and the silicon nitride liquid in a weight ratio of 5:3 and perform ball milling at a ball milling speed of 1500 r / min for 1 hour. After the ball milling is completed, wash with water, filter and dry to obtain a mica-blended silicon nitride agent;

[0071] S02: According to weight, 5 parts of mica, silicon nitride agent, 2 parts of sodium carboxymethyl cellulose and 1 part of stearic acid are blended and added to 8 parts of sodium citrate solution, and then 2 parts of lanthanum chloride solution are added, and the blending is ball-milled at a ball-milling speed of 1000 r / min for 2 hours. After sufficient ball-milling, the mixture is filtered and dried to obtain a modified additive;

[0072] S03: By weight, 45 parts of polyurethane elastomer, 10 parts of POE grafted maleic anhydride, 3 parts of silane coupling agent KH560 and 5 parts of modified additives are blended and stirred thoroughly to obtain a spindle, and then the spindle is melt-spun at 180° C. to obtain modified spandex fiber.

[0073] The polyurethane elastomer in this embodiment is TPU German Bayer 255 type; the grafting rate of POE grafted maleic anhydride is 15%;

[0074] The mass fraction of the sodium citrate solution is 3%; the mass fraction of the lanthanum chloride solution is 2%.

[0075] The silicon nitride solution of this embodiment includes the following raw materials in parts by weight:

[0076] 3 parts of silicon nitride powder, 3 parts of dopamine hydrochloride solution, 2 parts of cerium nitrate solution, 2 parts of sodium lignin sulfonate and 1 part of nano titanium dioxide.

[0077] The mass fraction of the dopamine hydrochloride solution in this embodiment is 2%; the mass fraction of the cerium nitrate solution is 3%.

[0078] The preparation method of the treatment agent of this embodiment is:

[0079] S101: stirring and mixing hydroxyapatite in a sufficient amount of sodium dodecyl sulfate solution to obtain hydroxyapatite liquid;

[0080] S102: 4 parts of silicon carbide whiskers, 1 part of silane coupling agent KH550, 2 parts of chitosan solution and 2 parts of silicon powder are fully blended by weight to obtain a whisker solution;

[0081] S103: ultrasonically treat the hydroxyapatite liquid and the whisker liquid in a weight ratio of 2:5, and then terminate the ultrasonic treatment to obtain a treatment agent.

[0082] The mass fraction of the sodium dodecyl sulfate solution in this embodiment is 4%; the mass fraction of the chitosan solution is 2%.

[0083] The ultrasonic power of the ultrasonic treatment in this embodiment is 400 W, and the ultrasonic time is 20 min.

[0084] The elastic knitted fabric for sportswear of the present embodiment is prepared by the above-mentioned method for preparing the elastic knitted fabric for sportswear.

[0085] Embodiment 2: A method for preparing a stretch knitted fabric for sportswear, comprising the following steps:

[0086] Step 1: 55 parts of modal fiber and 20 parts of modified spandex fiber are blended by weight to form a first spinning body, and 45 parts of polyolefin elastic fiber are used as a second spinning body;

[0087] Step 2: Weaving the first spinning body and the second spinning body into a cloth body by using a weft knitting circular machine, and subjecting the cloth body to a shaping treatment at 120° C. and a shaping speed of 20 m / min to obtain a shaped cloth body;

[0088] Step 3: Immerse the shaped fabric into a sufficient amount of treating agent and perform vacuum treatment. After the treatment is completed, dry it at 60° C. for 48 hours to obtain a stretch knitted fabric for sportswear.

[0089] The linear density of the polyolefin elastic fiber of this embodiment is 50D; the count of the first spinning body is 70S / 1;

[0090] The vacuum improvement treatment has an air pressure of 70 KPa, a temperature of 75° C., and a treatment time of 5 h.

[0091] The preparation method of the modified spandex fiber of this embodiment is:

[0092] S01: Preparation of mica and silicon nitride agent:

[0093] S011: heat-treating the nano-mica powder at 330° C. for 15 min, cooling it to 150° C. at a rate of 5° C. / min, keeping it at that temperature for 10 min, and then air-cooling it to room temperature to obtain heat-treated nano-mica powder;

[0094] S012: Mix the heat-treated nano-mica powder and the silicon nitride liquid in a weight ratio of 5:3 and perform ball milling at a ball milling speed of 1500 r / min for 1 hour. After the ball milling is completed, wash with water, filter and dry to obtain a mica-blended silicon nitride agent;

[0095] S02: According to weight, 8 parts of mica, silicon nitride agent, 4 parts of sodium carboxymethyl cellulose and 3 parts of stearic acid are blended and added to 12 parts of sodium citrate solution, and then 3 parts of lanthanum chloride solution are added, and the blending is ball-milled at a ball-milling speed of 1000 r / min for 2 hours. After sufficient ball-milling, the mixture is filtered and dried to obtain a modified additive;

[0096] S03: By weight, 50 parts of polyurethane elastomer, 15 parts of POE grafted maleic anhydride, 5 parts of silane coupling agent KH560 and 9 parts of modified additives are blended and stirred thoroughly to obtain a spindle, and then the spindle is melt-spun at 185° C. to obtain modified spandex fiber.

[0097] The polyurethane elastomer in this embodiment is TPU German Bayer 255 type; the grafting rate of POE grafted with maleic anhydride is 17%;

[0098] The mass fraction of the sodium citrate solution is 6%; the mass fraction of the lanthanum chloride solution is 5%.

[0099] The silicon nitride solution of this embodiment includes the following raw materials in parts by weight:

[0100] 5 parts of silicon nitride powder, 5 parts of dopamine hydrochloride solution, 5 parts of cerium nitrate solution, 3 parts of sodium lignin sulfonate and 2 parts of nano titanium dioxide.

[0101] The mass fraction of the dopamine hydrochloride solution in this embodiment is 5%; the mass fraction of the cerium nitrate solution is 6%.

[0102] The preparation method of the treatment agent of this embodiment is:

[0103] S101: stirring and mixing hydroxyapatite in a sufficient amount of sodium dodecyl sulfate solution to obtain hydroxyapatite liquid;

[0104] S102: 7 parts of silicon carbide whiskers, 3 parts of silane coupling agent KH550, 5 parts of chitosan solution and 4 parts of silicon powder are fully blended by weight to obtain a whisker solution;

[0105] S103: ultrasonically treat the hydroxyapatite liquid and the whisker liquid in a weight ratio of 2:5, and then terminate the ultrasonic treatment to obtain a treatment agent.

[0106] The mass fraction of the sodium dodecyl sulfate solution in this embodiment is 7%; the mass fraction of the chitosan solution is 5%.

[0107] The ultrasonic power of the ultrasonic treatment in this embodiment is 500W, and the ultrasonic time is 30min.

[0108] The elastic knitted fabric for sportswear of the present embodiment is prepared by the above-mentioned method for preparing the elastic knitted fabric for sportswear.

[0109] Embodiment 3: A method for preparing a stretch knitted fabric for sportswear, comprising the following steps:

[0110] Step 1: By weight, 50 parts of modal fiber and 17.5 parts of modified spandex fiber are blended to form a first spinning body, and 40 parts of polyolefin elastic fiber are used as a second spinning body;

[0111] Step 2: Weaving the first spinning body and the second spinning body into a cloth body by using a weft knitting circular machine, and subjecting the cloth body to a shaping treatment at 120° C. and a shaping speed of 20 m / min to obtain a shaped cloth body;

[0112] Step 3: Immerse the shaped fabric into a sufficient amount of treatment agent and perform vacuum treatment. After the treatment, dry it at 57° C. for 48 hours to obtain a stretch knitted fabric for sportswear.

[0113] The linear density of the polyolefin elastic fiber of this embodiment is 45D; the count of the first spinning body is 65S / 1;

[0114] The vacuum improvement treatment has an air pressure of 67 KPa, a temperature of 72° C., and a treatment time of 3.5 h.

[0115] The preparation method of the modified spandex fiber of this embodiment is:

[0116] S01: Preparation of mica and silicon nitride agent:

[0117] S011: heat-treating the nano-mica powder at 325°C for 12.5 minutes, cooling it to 150°C at a rate of 3.5°C / min, keeping it at that temperature for 10 minutes, and then air-cooling it to room temperature to obtain heat-treated nano-mica powder;

[0118] S012: Mix the heat-treated nano-mica powder and the silicon nitride liquid in a weight ratio of 5:3 and perform ball milling at a ball milling speed of 1500 r / min for 1 hour. After the ball milling is completed, wash with water, filter and dry to obtain a mica-blended silicon nitride agent;

[0119] S02: According to weight, 6.5 parts of mica, silicon nitride agent, 3 parts of sodium carboxymethyl cellulose and 2 parts of stearic acid are blended and added to 10 parts of sodium citrate solution, and then 2.5 parts of lanthanum chloride solution are added, and the blending is ball-milled at a ball-milling speed of 1000 r / min for 2 hours. After sufficient ball-milling, the mixture is filtered and dried to obtain a modified additive;

[0120] S03: By weight, 47.5 parts of polyurethane elastomer, 12.5 parts of POE grafted maleic anhydride, 4 parts of silane coupling agent KH560 and 7 parts of modified additives are blended and stirred thoroughly to obtain a spindle, and then the spindle is melt-spun at 182° C. to obtain modified spandex fiber.

[0121] The polyurethane elastomer in this embodiment is TPU German Bayer 255 type; the grafting rate of POE grafted with maleic anhydride is 16%;

[0122] The mass fraction of the sodium citrate solution is 4.5%; the mass fraction of the lanthanum chloride solution is 3.5%.

[0123] The silicon nitride solution of this embodiment includes the following raw materials in parts by weight:

[0124] 4 parts of silicon nitride powder, 4 parts of dopamine hydrochloride solution, 3.5 parts of cerium nitrate solution, 2.5 parts of sodium lignin sulfonate and 1.5 parts of nano titanium dioxide.

[0125] The mass fraction of the dopamine hydrochloride solution in this embodiment is 3.5%; the mass fraction of the cerium nitrate solution is 4.5%.

[0126] The preparation method of the treatment agent of this embodiment is:

[0127] S101: stirring and mixing hydroxyapatite in a sufficient amount of sodium dodecyl sulfate solution to obtain hydroxyapatite liquid;

[0128] S102: 5.5 parts of silicon carbide whiskers, 2 parts of silane coupling agent KH550, 3.5 parts of chitosan solution and 3 parts of silicon powder are fully blended by weight to obtain a whisker solution;

[0129] S103: ultrasonically treat the hydroxyapatite liquid and the whisker liquid in a weight ratio of 2:5, and then terminate the ultrasonic treatment to obtain a treatment agent.

[0130] The mass fraction of the sodium dodecyl sulfate solution in this embodiment is 5.5%; the mass fraction of the chitosan solution is 3.5%.

[0131] The ultrasonic power of the ultrasonic treatment in this embodiment is 450W, and the ultrasonic time is 25min.

[0132] The elastic knitted fabric for sportswear of the present embodiment is prepared by the above-mentioned method for preparing the elastic knitted fabric for sportswear.

[0133] Comparative Example 1:

[0134] The difference from Example 3 is that the modified spandex fiber is replaced by spandex fiber.

[0135] Comparative Example 2:

[0136] The difference from Example 3 is that no modifying additive is added in the preparation of the modified spandex fiber.

[0137] Comparative Example 3:

[0138] The difference from Example 3 is that mica and silicon nitride agent are not added to the modified additive.

[0139] Comparative Example 4:

[0140] The difference from Example 3 is that no heat-treated nano mica powder is added in the preparation of the mica-silicon nitride agent.

[0141] Comparative Example 5:

[0142] The difference from Example 3 is that no silicon nitride liquid is added in the preparation of the mica-blended silicon nitride agent.

[0143] Comparative Example 6:

[0144] The difference from Example 3 is that no silicon nitride powder is added to the silicon nitride liquid.

[0145] Comparative Example 7:

[0146] The difference from Example 3 is that no nano titanium dioxide is added to the silicon nitride liquid.

[0147] Comparative Example 8:

[0148] The difference from Example 3 is that no cerium nitrate solution or sodium lignin sulfonate is added to the silicon nitride solution.

[0149] Comparative Example 9:

[0150] The difference from Example 3 is that no dopamine hydrochloride solution is added to the silicon nitride liquid.

[0151] Comparative Example 10:

[0152] The difference from Example 3 is that no treatment agent was used.

[0153] Comparative Example 11:

[0154] The difference from Example 3 is that no hydroxyapatite liquid is added to the treating agent.

[0155] Comparative Example 12:

[0156] The difference from Example 3 is that no whisker liquid is added to the treating agent.

[0157] Comparative Example 13:

[0158] The difference from Example 3 is that silicon carbide whiskers and silane coupling agent KH550 are not added to the whisker liquid.

[0159] Comparative Example 14:

[0160] The difference from Example 3 is that no silicon powder is added to the whisker solution, and deionized water is used instead of the chitosan solution.

[0161] The performance of the products of Examples 1 to 3 and Comparative Examples 1 to 14 was routinely tested, and the products were washed with water once for 10 minutes each time, and then exposed to ultraviolet light at an intensity of 200 mj / m 2 The test was repeated 10 times to test the water resistance and light weather resistance. The performance measurement results are shown in Table 1.

[0162] Table 1 Product performance test results of Examples 1 to 3 and Comparative Examples 1 to 14:

[0163]

[0164] It can be seen from Examples 1 to 3 and Comparative Examples 1 to 14 that the moisture permeability, anti-fouling performance and elasticity of the product of Example 3 of the present invention can be improved in a coordinated manner, the moisture permeability, anti-fouling performance and elasticity of the product can be improved in a coordinated manner, and the product has excellent water-washing resistance and light-resistant stability;

[0165] It can be seen from Comparative Example 1, Comparative Example 10 and Example 3 that the performance of the modified spandex fiber, which is replaced by spandex fiber and not treated with a treatment agent, has a significant deterioration trend. The performance effect of the product is most significant when the two are coordinated.

[0166] It can be seen from Comparative Examples 1-5 and Example 3 that the performance of the products showed a significant trend of deterioration when no modifying additives were added to the preparation of the modified spandex fibers and mica-adjusted silicon nitride agents were added to the modifying additives. The performance of the products also showed a trend of deterioration when no heat-treated nano-mica powder was added to the preparation of the mica-adjusted silicon nitride agents and no silicon nitride liquid was added to the preparation of the mica-adjusted silicon nitride agents.

[0167] It can be seen from Comparative Examples 6-9 and Example 3 that, at the same time, no silicon nitride powder was added to the silicon nitride liquid, no nano titanium dioxide was added to the silicon nitride liquid, no cerium nitrate solution was added to the silicon nitride liquid, sodium lignin sulfonate was added to the silicon nitride liquid, and no dopamine hydrochloride solution was added to the silicon nitride liquid. The performance of the product showed a trend of varying degrees of deterioration. The silicon nitride liquid obtained by the specific method of the present invention had the most obvious performance effect.

[0168] The specific mica-silicon nitride agent of the present invention and the modified additive obtained by the method of the present invention are used at the same time, and the product performance effect is the most significant, and the effect of using other methods instead is not as obvious as that of the present invention;

[0169] It can be seen from Comparative Examples 11-14 and Example 3 that when no hydroxyapatite liquid was added to the treating agent, no whisker liquid was added to the treating agent, no silicon carbide whiskers were added to the whisker liquid, and the silane coupling agent KH550 was not added to the whisker liquid, and the chitosan solution was replaced by deionized water, the performance of the products all tended to deteriorate. The hydroxyapatite liquid and whisker liquid obtained by the method of the present invention had the most significant product performance effect, and the effects of other methods were not as obvious as those of the present invention.

[0170] 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 present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

[0171] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A method for preparing a stretch knitted fabric for sportswear, characterized in that: The following steps are involved: Step 1: By weight, 45-55 parts of modal fiber and 15-20 parts of modified spandex fiber are blended to form a first spinning body, and 35-45 parts of polyolefin elastic fiber are blended to form a second spinning body; The preparation method of the modified spandex fiber is: S01: Preparation of mica and silicon nitride agent: S011: heat-treating the nano mica powder at 320-330°C for 10-15 minutes, cooling it to 150°C at a rate of 2-5°C / min, keeping it at that temperature for 10 minutes, and then air-cooling it to room temperature to obtain heat-treated nano mica powder; S012: Mix the heat-treated nano-mica powder and the silicon nitride liquid in a weight ratio of 5:3 and perform ball milling at a ball milling speed of 1500 r / min for 1 hour. After the ball milling is completed, wash with water, filter and dry to obtain a mica-blended silicon nitride agent; S02: According to weight, 5-8 parts of mica, silicon nitride agent, 2-4 parts of sodium carboxymethyl cellulose, and 1-3 parts of stearic acid are blended and added to 8-12 parts of sodium citrate solution, and then 2-3 parts of lanthanum chloride solution are added, and the blending is ball-milled at a ball-milling speed of 1000r / min for 2h. After sufficient ball-milling, the modified additive is filtered and dried to obtain; S03: By weight, 45-50 parts of polyurethane elastomer, 10-15 parts of POE grafted maleic anhydride, 3-5 parts of silane coupling agent KH560 and 5-9 parts of modified additives are mixed and stirred to obtain a spindle, and then the spindle is melt-spun at 180-185° C. to obtain modified spandex fiber; The silicon nitride liquid comprises the following raw materials in parts by weight: 3-5 parts of silicon nitride powder, 3-5 parts of dopamine hydrochloride solution, 2-5 parts of cerium nitrate solution, 2-3 parts of sodium lignin sulfonate and 1-2 parts of nano titanium dioxide; Step 2: Weaving the first spinning body and the second spinning body into a cloth body by using a weft knitting circular machine, and subjecting the cloth body to a shaping treatment at 120° C. and a shaping speed of 20 m / min to obtain a shaped cloth body; Step 3: Immerse the shaped fabric into a sufficient amount of treatment agent, and perform vacuum treatment. After the treatment, dry it at 55-60° C. for 48 hours to obtain a stretch knitted fabric for sportswear. The preparation method of the treatment agent is: S101: stirring and mixing hydroxyapatite in a sufficient amount of sodium dodecyl sulfate solution to obtain hydroxyapatite liquid; S102: By weight, 4-7 parts of silicon carbide whiskers, 1-3 parts of silane coupling agent KH550, 2-5 parts of chitosan solution and 2-4 parts of silicon powder are fully blended to obtain a whisker solution; S103: ultrasonically treat the hydroxyapatite liquid and the whisker liquid at a weight ratio of 2:5, and then terminate the ultrasonic treatment to obtain a treatment agent.

2. The method for preparing a stretch knitted fabric for sportswear according to claim 1, characterized in that: The linear density of the polyolefin elastic fiber is 40-50D; the count of the first spinning body is 60-70S / 1; The vacuum improvement treatment has an air pressure of 65-70 KPa, a temperature of 70-75° C., and a treatment time of 2-5 h.

3. The method for preparing a stretch knitted fabric for sportswear according to claim 1, characterized in that: The polyurethane elastomer is TPU German Bayer 255 type; the grafting rate of POE grafted maleic anhydride is 15-17%; The mass fraction of the sodium citrate solution is 3-6%; the mass fraction of the lanthanum chloride solution is 2-5%.

4. The method for preparing a stretch knitted fabric for sportswear according to claim 1, characterized in that: The mass fraction of the dopamine hydrochloride solution is 2-5%; the mass fraction of the cerium nitrate solution is 3-6%.

5. The method for preparing a stretch knitted fabric for sportswear according to claim 1, characterized in that: The mass fraction of the sodium dodecyl sulfate solution is 4-7%; the mass fraction of the chitosan solution is 2-5%.

6. The method for preparing a stretch knitted fabric for sportswear according to claim 1, characterized in that: The ultrasonic power of the ultrasonic treatment is 400-500W, and the ultrasonic time is 20-30min.

7. A stretch knitted fabric for sportswear, prepared by the method for preparing a stretch knitted fabric for sportswear according to any one of claims 1 to 6.

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