Cool-sense chinlon yarn and preparation process and application thereof

Abstract

The invention relates to the field of chinlon yarns, in particular to a cool chinlon yarn and a preparation process and application thereof. The invention relates to a preparation process of cool chinlon yarns. The preparation process comprises the following steps: step 1, preparing cool master batches; step 2, mixing and stirring chinlon 66 slices and the cool master batches; the mass percent of the cool master batch is 1-5%; 3, the materials in the step 2 are put into a screw extruder, compressed, mixed and heated to be molten, and a spinning solution in a molten state is obtained; 4, the spinning solution in the molten state passes through a spinning assembly and is extruded out of a spinneret orifice, and then the spinning solution is stretched, cooled and solidified under cold air blowing in the circumferential direction to become flat solid fiber strips; oiling, yarn guiding and winding are carried out in sequence, and yarn balls are obtained; 5, twisting, heat setting, untwisting and heat setting again are conducted on the yarn balls, and the cool sense chinlon yarn is obtained. When the yarn is applied to sportswear, the breathability and cool feeling can be remarkably improved.

Description

Technical Field

[0001] The present application relates to the field of nylon yarns, and more specifically, to a cool nylon yarn and a preparation process and application thereof. Background Art

[0002] In modern society, with the popularization of health awareness, various forms of exercise have been integrated into people's daily lives. Whether it is the tranquility of yoga, the vitality of aerobics, the passion of running, or other diverse forms of exercise, they all rely on the support and assistance of professional sports equipment. Especially in high-intensity exercise or hot climate conditions, the human body will quickly produce a lot of sweat, causing the body temperature to rise. If sports equipment cannot provide sufficient breathability and cooling functions, it will greatly affect the wearer's sports experience and physical health.

[0003] Traditional sportswear materials, such as pure cotton, are known for their good moisture absorption, but poor breathability, which easily leads to sweat accumulation inside the clothing and difficulty in evaporation, thereby increasing the burden on the body and affecting exercise comfort. Although polyester materials have good breathability, they have poor moisture absorption, and sweat is easily retained on the skin surface, which not only affects the exercise experience, but may also cause skin discomfort or health problems.

[0004] As a commonly used material for sportswear, nylon is favored for its excellent wear resistance, elastic recovery and light weight. However, although nylon has improved breathability compared to pure cotton, its breathability is still insufficient in high-intensity exercise or hot weather conditions, making it difficult to quickly discharge the heat and sweat generated in the body. At the same time, nylon's own cooling function is also limited, and it cannot effectively reduce the body temperature and bring a cool wearing experience to the wearer.

[0005] Therefore, in order to enhance the sports experience and protect physical health, it is particularly important to develop a nylon sportswear material that is both breathable and has a cooling function. Summary of the invention

[0006] In order to solve the above problems, the present application provides a cool nylon yarn and its preparation process and application.

[0007] In a first aspect, the present application provides a preparation process of a cool nylon yarn, which adopts the following technical solution: A preparation process of a cool nylon yarn comprises the following steps: Step 1: Prepare cooling masterbatch: Step 1a: Mix seaweed extract, eucalyptus leaf extract, nitrogen boron fiber, jade and water, stir at 2500-3000 r / min for 30-40 min, and then soak at 60-80° C. for 4-6 h to obtain a mixture; Step 1b: freeze-drying the mixture to obtain a mixture; Step 1c: Mix nylon 66, the mixture, BeO, TiO2 and the dispersant, melt and plasticize, and then pelletize and discharge to obtain a cool masterbatch; Step 2: Dry the nylon 66 slices and the cool masterbatch respectively until the moisture content is less than 0.1%, and then put them into the feeder for mixing and stirring evenly; the mass percentage of the cool masterbatch is 1-5%; Step 3: putting the materials in step 2 into a screw extruder, compressing, mixing, heating and melting to obtain a molten spinning solution; Step 4: The molten spinning solution is extruded through the spinning assembly and the spinneret hole, and then stretched, cooled, and solidified under the cold wind blowing in the annular direction to become a flat solid fiber filament; and then oiled, guided, and wound in sequence to obtain a yarn ball; Step 5: The yarn ball is twisted, heat-set, untwisted, and heat-set again to obtain a cool nylon yarn.

[0008] Nitrogen boron fiber, with its natural moisture absorption and air permeability and good fiber structure, is an ideal carrier for jade particles. Under specific processing conditions, some jade particles are incorporated into the nitrogen boron fiber and tightly combined with the fiber to form a unique composite structure, which helps to enhance the overall performance of the material; and nitrogen boron fiber is resistant to high temperatures and can coexist with the molten spinning solution.

[0009] Eucalyptus leaves in eucalyptus leaf extract are rich in volatile oils, especially eucalyptol, which has a significant cooling effect. Through specific mixing and soaking treatments, the active ingredients of eucalyptus leaf extract can penetrate into the interior of the nitrogen boron fiber and work together with the jade particles to further enhance the cooling feeling of the material. At the same time, the antibacterial properties of eucalyptus leaf extract allow the wearer to enjoy the coolness while maintaining physical comfort and health.

[0010] Seaweed extract is rich in natural ingredients such as polysaccharides and amino acids, and has good film-forming properties and air permeability. During the soaking and mixing process, it can be coated on the surface of the nitrogen-boron fiber containing jade and eucalyptus leaf extracts to quickly form a thin and uniform breathable film. This film not only enhances the wear resistance and tear resistance of the material, but also acts like a "protective net" that tightly wraps the jade particles inside, effectively preventing the jade from falling off during use. At the same time, the air permeability of the seaweed extract ensures the overall breathing performance of the material, allowing the wearer to feel cool and comfortable even in hot weather.

[0011] By adopting the above technical solution, the cooling masterbatch composed of jade, nitrogen boron fiber, eucalyptus leaf extract, seaweed extract, etc. has strong air permeability and cooling feeling.

[0012] The special cool masterbatch of the present application is blended and interwoven with nylon 66, so that the nylon yarn itself has excellent heat dissipation performance and cool touch characteristics. Nylon yarn can absorb and disperse the heat generated by the human body, reduce the body temperature, and bring a cool wearing experience.

[0013] In addition, nylon yarn containing cooling masterbatch can effectively enhance the air flow through tiny holes and channels in the fiber structure, accelerate sweat evaporation, and keep the body dry. This makes the cooling nylon yarn significantly reduce the body temperature, reduce sweat accumulation, and improve wearing comfort in hot climates or during high-intensity exercise.

[0014] Applying cool nylon yarn to sportswear such as yoga pants, bell-bottom pants, sports vests, sports bras, and sports shorts not only significantly improves the comfort of the wearer in hot climates and during exercise, but also further enhances the wearing experience and fashion sense of sportswear due to its lightness, softness, and skin-fitting properties. Especially in clothing that fits closely to the skin, such as yoga pants and sports vests, the breathable, cool feeling, and moisture absorption and perspiration-wicking functions of cool nylon yarn can be fully utilized, allowing the wearer to enjoy a more refreshing and comfortable sports experience.

[0015] Preferably, according to the mass percentage of the mixture, the seaweed extract is 0.5-2%, the eucalyptus leaf extract is 2-5%, the nitrogen boron fiber is 1-3%, and the jade is 3-6%.

[0016] By adopting the above technical scheme, the dosage relationship of jade, nitrogen boron fiber, eucalyptus leaf extract and seaweed extract in the mixture is further limited, which is conducive to the formation of a special structure, so that the breathability and cooling effects of the cooling masterbatch can be maximized.

[0017] Preferably, the particle size of the jade is 200-300nm.

[0018] By adopting the above technical solution, the particle size of jade is further limited, so that jade can enter the nitrogen boron fiber more effectively and combine closely with the nitrogen boron fiber. This not only enhances the transmission efficiency of the thermal conductivity of jade, but also ensures the uniform distribution of the cooling feeling in the material, effectively improving the breathability and cooling effect of the cooling masterbatch.

[0019] Preferably, the freeze-drying conditions are: vacuum degree 20-35 Pa, temperature (-10°C)-(-5°C).

[0020] Preferably, according to the mass percentage of the cooling masterbatch, the mixture is 5-8%, BeO is 15-25%, TiO2 is 15-25%, and the dispersant is 5-10%.

[0021] Preferably, the drying conditions in step 2 are: gas flow rate 400-500m3 / h, drying temperature 85-95℃, drying time 18-24h.

[0022] Nylon 66 chips are water-absorbent. If the moisture content is too high, it will affect the processing stability and lead to production defects. The performance of the cooling masterbatch may also be affected by moisture. Drying can ensure its stable performance. In addition, moisture may also affect the uniformity and compatibility of the two mixtures, thereby affecting the quality of the final product. Therefore, drying the nylon 66 chips and cooling masterbatch before mixing can effectively reduce the moisture content and improve the stability of the processing and product quality.

[0023] In a second aspect, the present application provides a cool nylon yarn.

[0024] In a third aspect, the present application provides an application of cool nylon yarn in sportswear.

[0025] Incorporating cool nylon yarn into sportswear such as yoga pants, flared pants, sports vests, sports bras and sports shorts not only greatly improves the comfort of the wearer in hot summer and high-intensity exercise, but also brings a better wearing experience to sportswear with its lightness, softness and close fit to the skin, especially for yoga pants and sports vests that fit close to the body.

[0026] In summary, this application has the following beneficial effects: The cool masterbatch containing ingredients such as jade, nitrogen boron fiber, eucalyptus leaf extract, and seaweed extract is blended and interwoven with nylon 66 to produce a cool nylon yarn with excellent heat dissipation performance and a cool touch.

[0027] Nylon yarn itself has good moisture absorption and perspiration properties, which can absorb and disperse the heat generated by the human body and reduce the body temperature. The addition of cooling masterbatch further enhances the breathability and cooling feeling of the yarn.

[0028] In hot climates or during high-intensity exercise, cool nylon yarn can significantly reduce body temperature, reduce sweat accumulation, and keep the body dry. This yarn is light, soft, and fits the skin. Applying it to sportswear such as yoga pants, flared pants, and sports vests not only improves the wearer's comfort in hot climates and during exercise, but also enhances the wearing experience and fashion sense of sportswear. Especially in clothing that fits close to the skin, the breathable coolness and moisture absorption and perspiration-wicking functions of cool nylon yarn can be fully utilized, allowing the wearer to enjoy a more refreshing and comfortable sports experience. DETAILED DESCRIPTION

[0029] The present application is further described in detail below in conjunction with embodiments.

[0030] The raw materials used in the following examples and comparative examples are all commercially available products.

[0031] The sources of some raw materials are as follows: Seaweed extract was commercially available from Guangzhou Huayu Biotechnology Co., Ltd.

[0032] Eucalyptus leaf extract was commercially available from Gansu Yishengxiang Biotechnology Co., Ltd.

[0033] The jade was commercially available and purchased from the Tianze Mineral Products Processing Factory in Lingshou County. Example

[0034] Example 1 A preparation process of a cool nylon yarn comprises the following steps: Step 1: Prepare cooling masterbatch: Step 1a: Prepare materials according to the following mass percentages: 1% seaweed extract, 3% eucalyptus leaf extract, 2% nitrogen boron fiber, 5% jade, and add water to 100%.

[0035] The particle size of jade is 250nm.

[0036] Step 1b: Mix seaweed extract, eucalyptus leaf extract, nitrogen boron fiber, jade and water in proportion, stir at 2800 r / min for 35 minutes, and then soak at 70° C. for 5 hours to obtain a mixture.

[0037] Step 1c: freeze-dry the mixture. The freeze-drying conditions are: vacuum degree 30Pa, temperature -8°C.

[0038] After freeze-drying, a mixture was obtained.

[0039] Step 1d: Prepare the materials according to the following mass percentages: 6% mixture, 20% BeO, 20% TiO2, 8% dispersant, and nylon 66 is supplemented to 100%.

[0040] The dispersant is ethylene-acrylic acid copolymer.

[0041] Nylon 66, mixture, BeO, TiO2 and dispersant are mixed and fed into a screw machine for melting and plasticization.

[0042] The temperature control of each temperature zone of the screw machine is as follows: the temperature of the first temperature zone is 240℃; the temperature of the second temperature zone is 250℃; the temperature of the third temperature zone is 270℃; the temperature of the fourth temperature zone is 280℃; the temperature of the fifth temperature zone is 270℃; the temperature of the sixth temperature zone is 260℃; the temperature of the seventh temperature zone is 250℃; the temperature of the eighth temperature zone is 250℃; the temperature of the ninth temperature zone is 270℃; the temperature of the head temperature zone is 280℃.

[0043] Step 1e: pelletize and vacuum dry the melt-plasticized material, and then discharge the material to obtain a cooling masterbatch.

[0044] Step 2: Use nitrogen as the drying medium to dry nylon 66 chips and cool masterbatch respectively, with a nitrogen flow rate of 450m 3 / h, nitrogen oxygen content is less than 3ppm, drying temperature is 90℃, drying time is about 20h, so that the moisture content of nylon 66 chips and cool masterbatch is less than 0.1%.

[0045] Step 3: Control the feeding amount through the loss-in-weight feeder, put the nylon 66 chips and cooling masterbatch into the mixing silo and mix them evenly.

[0046] The mass percentage of the cool masterbatch is 1%, and the rest is nylon 66 chips.

[0047] Step 4: Put the material from step 3 into the screw extruder.

[0048] The materials are fed into zones 1 and 2 of the screw press. As the screw in the screw machine rotates, the materials pass through zones 3, 4 and 5 of the screw press in turn, and are compressed, mixed and heated to melt. The temperature of zone 1 of the extruder is 305°C, the temperature of zone 2 is 305°C, the temperature of zone 3 is 295°C, the temperature of zone 2 is 287°C, and the temperature of zone 3 is 285°C.

[0049] After the above compression mixing and heating and melting, a spinning solution in a molten state is obtained.

[0050] Step 5: The molten spinning solution enters the spinning box, passes through the spinning metering pump, and reaches the spinning assembly. The initial pressure of the spinning assembly is controlled at about 20MPa. The molten spinning solution passes through the filter layer and reaches the spinneret. The spinneret holes on the spinneret are flat in shape, and the aspect ratio of the spinneret holes is selected to be 4:1.

[0051] After the molten spinning solution passes through the spinneret, it is stretched and cooled and solidified under the annular cold air, becoming a flat solid filament. It is then oiled by the oiling roller, guided by the guide roller, and then wound into a yarn ball by the winding roller.

[0052] Step 6: After the yarn ball is balanced under standard conditions, it goes through the subsequent twisting, heat setting, and untwisting processes, and then heat setting again to obtain the cool nylon yarn.

[0053] Twisting: drawing temperature 200°C; drawing multiple 1.23; drawing roller speed 550m / min; twisting is S twist, twisting tension 30cN.

[0054] Heat setting: temperature 200℃; winding speed 500m / min.

[0055] Untwisting: tension 30 cN; the ratio D / Y of the surface speed of the friction disk to the speed of the yarn leaving the false twister is 1.5; the network air pressure is 1.0 bar; the nozzle diameter is 1.0 mm.

[0056] The cool nylon yarn is used for processing fabrics, and is particularly suitable for use in sportswear such as yoga pants, bell-bottom pants, sports vests, sports bras, and sports shorts.

[0057] Example 2 A preparation process of a cool nylon yarn, which is different from that of Example 1 in that some parameters are different, specifically comprises the following steps: Step 1: Prepare cooling masterbatch: Step 1a: Prepare materials according to the following mass percentages: 0.5% seaweed extract, 2% eucalyptus leaf extract, 1% nitrogen boron fiber, 3% jade, and add water to 100%.

[0058] The particle size of jade is 200nm.

[0059] Step 1b: Mix seaweed extract, eucalyptus leaf extract, nitrogen boron fiber, jade and water in proportion, stir at 2500 r / min for 40 minutes, and then soak at 60° C. for 6 hours to obtain a mixture.

[0060] Step 1c: freeze-dry the mixture. The freeze-drying conditions are: vacuum degree 20Pa, temperature -10°C.

[0061] After freeze-drying, a mixture was obtained.

[0062] Step 1d: Prepare the materials according to the following mass percentages: 5% mixture, 15% BeO, 25% TiO2, 5% dispersant, and nylon 66 is supplemented to 100%.

[0063] The dispersant is ethylene-acrylic acid copolymer.

[0064] Nylon 66, mixture, BeO, TiO2 and dispersant are mixed and fed into a screw machine for melting and plasticization.

[0065] The temperature control of each temperature zone of the screw machine is as follows: the temperature of the first temperature zone is 240℃; the temperature of the second temperature zone is 250℃; the temperature of the third temperature zone is 270℃; the temperature of the fourth temperature zone is 280℃; the temperature of the fifth temperature zone is 270℃; the temperature of the sixth temperature zone is 260℃; the temperature of the seventh temperature zone is 250℃; the temperature of the eighth temperature zone is 250℃; the temperature of the ninth temperature zone is 270℃; the temperature of the head temperature zone is 280℃.

[0066] Step 1e: pelletize and vacuum dry the melt-plasticized material, and then discharge the material to obtain a cooling masterbatch.

[0067] Step 2: Use nitrogen as the drying medium to dry nylon 66 chips and cool masterbatch respectively, with a nitrogen flow rate of 400m 3 / h, nitrogen oxygen content is less than 3ppm, drying temperature is 95℃, and drying time is 18h.

[0068] Step 3: Control the feeding amount through the loss-in-weight feeder, put the nylon 66 chips and cooling masterbatch into the mixing silo and mix them evenly.

[0069] The mass percentage of the cool masterbatch is 2%, and the rest is nylon 66 chips.

[0070] Step 4: Put the material from step 3 into the screw extruder.

[0071] The materials are fed into zones 1 and 2 of the screw press. As the screw in the screw machine rotates, the materials pass through zones 3, 4 and 5 of the screw press in turn, and are compressed, mixed and heated to melt. The temperature of zone 1 of the extruder is 305°C, the temperature of zone 2 is 305°C, the temperature of zone 3 is 295°C, the temperature of zone 2 is 287°C, and the temperature of zone 3 is 285°C.

[0072] After the above compression mixing and heating and melting, a spinning solution in a molten state is obtained.

[0073] Step 5: The molten spinning solution enters the spinning box, passes through the spinning metering pump, and reaches the spinning assembly. The initial pressure of the spinning assembly is controlled at about 20MPa. The molten spinning solution passes through the filter layer and reaches the spinneret. The spinneret holes on the spinneret are flat in shape, and the aspect ratio of the spinneret holes is selected to be 4:1.

[0074] After the molten spinning solution passes through the spinneret, it is stretched and cooled and solidified under the annular cold air, becoming a flat solid filament. It is then oiled by the oiling roller, guided by the guide roller, and then wound into a yarn ball by the winding roller.

[0075] Step 6: After the yarn ball is balanced under standard conditions, it goes through the subsequent twisting, heat setting, and untwisting processes, and then heat setting again to obtain the cool nylon yarn.

[0076] Twisting: drawing temperature 200°C; drawing multiple 1.23; drawing roller speed 550m / min; twisting is S twist, twisting tension 30cN.

[0077] Heat setting: temperature 200℃; winding speed 500m / min.

[0078] Untwisting: tension 30 cN; the ratio D / Y of the surface speed of the friction disk to the speed of the yarn leaving the false twister is 1.5; the network air pressure is 1.0 bar; the nozzle diameter is 1.0 mm.

[0079] Example 3 A preparation process of a cool nylon yarn, which is different from that of Example 1 in that some parameters are different, specifically comprises the following steps: Step 1: Prepare cooling masterbatch: Step 1a: Prepare materials according to the following mass percentages: 2% seaweed extract, 5% eucalyptus leaf extract, 3% nitrogen boron fiber, 6% jade, and add water to 100%.

[0080] The particle size of jade is 300nm.

[0081] Step 1b: Mix seaweed extract, eucalyptus leaf extract, nitrogen boron fiber, jade and water in proportion, stir at 3000 r / min for 30 minutes, and then soak at 80° C. for 4 hours to obtain a mixture.

[0082] Step 1c: freeze-dry the mixture. The freeze-drying conditions are: vacuum degree 35 Pa, temperature -5°C.

[0083] After freeze-drying, a mixture was obtained.

[0084] Step 1d: Prepare the materials according to the following mass percentages: 8% mixture, 25% BeO, 15% TiO2, 10% dispersant, and nylon 66 is supplemented to 100%.

[0085] The dispersant is ethylene-acrylic acid copolymer.

[0086] Nylon 66, mixture, BeO, TiO2 and dispersant are mixed and fed into a screw machine for melting and plasticization.

[0087] The temperature control of each temperature zone of the screw machine is as follows: the temperature of the first temperature zone is 240℃; the temperature of the second temperature zone is 250℃; the temperature of the third temperature zone is 270℃; the temperature of the fourth temperature zone is 280℃; the temperature of the fifth temperature zone is 270℃; the temperature of the sixth temperature zone is 260℃; the temperature of the seventh temperature zone is 250℃; the temperature of the eighth temperature zone is 250℃; the temperature of the ninth temperature zone is 270℃; the temperature of the head temperature zone is 280℃.

[0088] Step 1e: pelletize and vacuum dry the melt-plasticized material, and then discharge the material to obtain a cooling masterbatch.

[0089] Step 2: Use nitrogen as the drying medium to dry nylon 66 chips and cool masterbatch respectively, with a nitrogen flow rate of 500m3 / h, nitrogen oxygen content is less than 3ppm, drying temperature is 85℃, and drying time is 24h.

[0090] Step 3: Control the feeding amount through the loss-in-weight feeder, put the nylon 66 chips and cooling masterbatch into the mixing silo and mix them evenly.

[0091] The mass percentage of the cool masterbatch is 5%, and the rest is nylon 66 chips.

[0092] Step 4: Put the material from step 3 into the screw extruder.

[0093] The materials are fed into zones 1 and 2 of the screw press. As the screw in the screw machine rotates, the materials pass through zones 3, 4 and 5 of the screw press in turn, and are compressed, mixed and heated to melt. The temperature of zone 1 of the extruder is 305°C, the temperature of zone 2 is 305°C, the temperature of zone 3 is 295°C, the temperature of zone 2 is 287°C, and the temperature of zone 3 is 285°C.

[0094] After the above compression mixing and heating and melting, a spinning solution in a molten state is obtained.

[0095] Step 5: The molten spinning solution enters the spinning box, passes through the spinning metering pump, and reaches the spinning assembly. The initial pressure of the spinning assembly is controlled at about 20MPa. The molten spinning solution passes through the filter layer and reaches the spinneret. The spinneret holes on the spinneret are flat in shape, and the aspect ratio of the spinneret holes is selected to be 4:1.

[0096] After the molten spinning solution passes through the spinneret, it is stretched and cooled and solidified under the annular cold air, becoming a flat solid filament. It is then oiled by the oiling roller, guided by the guide roller, and then wound into a yarn ball by the winding roller.

[0097] Step 6: After the yarn ball is balanced under standard conditions, it goes through the subsequent twisting, heat setting, and untwisting processes, and then heat setting again to obtain the cool nylon yarn.

[0098] Twisting: drawing temperature 200°C; drawing multiple 1.23; drawing roller speed 550m / min; twisting is S twist, twisting tension 30cN.

[0099] Heat setting: temperature 200℃; winding speed 500m / min.

[0100] Untwisting: tension 30 cN; the ratio D / Y of the surface speed of the friction disk to the speed of the yarn leaving the false twister is 1.5; the network air pressure is 1.0 bar; the nozzle diameter is 1.0 mm.

[0101] Example 4 A preparation process of a cool nylon yarn, which is different from that of Example 1 in that: in the cool masterbatch, the materials are prepared according to the following mass percentages: 3% seaweed extract, 1% eucalyptus leaf extract, 5% nitrogen boron fiber, 2% jade, and water is added to 100%.

[0102] Comparative Example Comparative Example 1 A preparation process of a cool nylon yarn, which is different from that of Example 1 in that: in the cool masterbatch, the seaweed extract is replaced by the tremella extract.

[0103] Comparative Example 2 A preparation process of a cool nylon yarn, which is different from that of Example 1 in that: in the cool masterbatch, the eucalyptus leaf extract is replaced by peppermint extract.

[0104] Comparative Example 3 A preparation process of a cool nylon yarn, which is different from that of Example 1 in that: in the cool masterbatch, the nitrogen boron fiber is replaced by jute fiber.

[0105] Comparative Example 4 A preparation process of a cool nylon yarn, which is different from that of Example 1 in that: Step 1b: Mix seaweed extract, eucalyptus leaf extract, nitrogen boron fiber, jade and water in proportion, stir at 280 r / min for 35 minutes, and then soak at 70° C. for 5 hours to obtain a mixture.

[0106] Comparative Example 5 A preparation process of a cool nylon yarn, which is different from that of Example 1 in that: Step 1b: Mix seaweed extract, eucalyptus leaf extract, nitrogen boron fiber, jade and water in proportion, stir at 2800 r / min for 35 minutes, and then soak at 25° C. for 5 hours to obtain a mixture.

[0107] Comparative Example 6 A preparation process of a cool nylon yarn, which is different from that of Example 1 in that step 1a and step 1b are omitted, and the mixture is replaced by jade.

[0108] That is, step 1 includes the following steps: Step 1a: Prepare the materials according to the following mass percentages: 6% jade, 20% BeO, 20% TiO2, 4% dispersant, and nylon 66 is supplemented to 100%.

[0109] The particle size of jade is 250nm.

[0110] The dispersant is ethylene-acrylic acid copolymer.

[0111] Nylon 66, jade, BeO, TiO2 and dispersant are mixed and fed into a screw machine for melting and plasticization.

[0112] The temperature control of each temperature zone of the screw machine is as follows: the temperature of the first temperature zone is 240℃; the temperature of the second temperature zone is 250℃; the temperature of the third temperature zone is 270℃; the temperature of the fourth temperature zone is 280℃; the temperature of the fifth temperature zone is 270℃; the temperature of the sixth temperature zone is 260℃; the temperature of the seventh temperature zone is 250℃; the temperature of the eighth temperature zone is 250℃; the temperature of the ninth temperature zone is 270℃; the temperature of the head temperature zone is 280℃.

[0113] Step 1b: pelletize and vacuum dry the melt-plasticized material, and then discharge the material to obtain a cooling masterbatch.

[0114] Performance testing The cool nylon yarns of Examples 1-4 and Comparative Examples 1-6 were woven into fabrics, and the following performance tests were performed: 1. Air permeability test: refer to GB / T 5453-1997 "Determination of air permeability of textile fabrics" for testing, and record the air permeability in Table 1.

[0115] 2. Cooling sensation test: Refer to GB / T 35263-2017 "Testing and evaluation of instantaneous cooling sensation of textiles" for testing. max Recorded in Table 1.

[0116] Using KES-F7 contact cold and warm tester, under constant temperature and humidity conditions, set the sample stage temperature to (20±2)℃, the heat detection plate temperature to (35±0.5)℃, and measure the q of the cool fiber cloth sample. max Value, when q max ≥0.15J / cm 2 ·s, it means that the fabric has the property of instant coolness upon contact. The larger the value, the stronger the coolness upon contact.

[0117] Table 1 Group Air permeability (mm / s) <![CDATA[qmax(J / cm 2 ·s)]]> Example 1 2076 0.37 Example 2 2058 0.36 Example 3 2098 0.39 Example 4 1923 0.33 Comparative Example 1 1630 0.21 Comparative Example 2 1562 0.30 Comparative Example 3 1446 0.20 Comparative Example 4 1506 0.26 Comparative Example 5 1544 0.30 Comparative Example 6 1474 0.29 Comparative Example 6 is based on Example 1, but the mixture is replaced with jade to simulate the cool masterbatch on the market. According to the test data in Table 1, the air permeability, q max All of them are lower than those in Example 1, indicating that the air permeability and cooling effects of Comparative Example 6 are not as good as those in Example 1.

[0118] Comparative Examples 1-3 are based on Example 1, and any of the seaweed extract, eucalyptus leaf extract, and nitrogen boron fiber is replaced with other raw materials, aiming to destroy the special combination of seaweed extract, eucalyptus leaf extract, nitrogen boron fiber, and jade. Comparative Example 4 is based on Example 1, and the mixing speed of seaweed extract, eucalyptus leaf extract, nitrogen boron fiber, and jade is changed so that the speed is not within a specific optimal range. Comparative Example 5 is based on Example 1, and the mixing temperature of seaweed extract, eucalyptus leaf extract, nitrogen boron fiber, and jade is changed so that the temperature is not within a specific optimal range. According to the test data in Table 1, the air permeability, q max All of them decreased to varying degrees. This shows that seaweed extract, eucalyptus leaf extract, nitrogen boron fiber, and jade need specific mixing conditions to achieve the best combination effect.

[0119] Example 4 is based on Example 1, and the dosage relationship of seaweed extract, eucalyptus leaf extract, nitrogen boron fiber, and jade is changed. According to the test data in Table 1, although Example 4 still has good air permeability and cooling effect, the effect is not as significant as Example 1. It shows that further limiting the dosage relationship of seaweed extract, eucalyptus leaf extract, nitrogen boron fiber, and jade is more conducive to the formation of special structures, thereby exerting significant air permeability and cooling effect.

[0120] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A preparation process of a cool nylon yarn, characterized in that: The following steps are involved: Step 1: Prepare cooling masterbatch: Step 1a: Mix seaweed extract, eucalyptus leaf extract, nitrogen boron fiber, jade and water, stir at 2500-3000 r / min for 30-40 min, and then soak at 60-80° C. for 4-6 h to obtain a mixture; Step 1b: freeze-drying the mixture to obtain a mixture; Step 1c: Mix nylon 66, the mixture, BeO, TiO2 and the dispersant, melt and plasticize, and then pelletize and discharge to obtain a cool masterbatch; Step 2: Dry the nylon 66 slices and the cool masterbatch separately until the moisture content is less than 0.1%, and then put them into the feeder for mixing and stirring evenly; the mass percentage of the cool masterbatch is 1-5%; Step 3: putting the materials in step 2 into a screw extruder, compressing, mixing, heating and melting to obtain a molten spinning solution; Step 4: The molten spinning solution is extruded through the spinning assembly and the spinneret hole, and then stretched, cooled, and solidified under the cold wind blowing in the annular direction to become a flat solid fiber filament; and then oiled, guided, and wound in sequence to obtain a yarn ball; Step 5: The yarn ball is twisted, heat-set, untwisted, and heat-set again to obtain a cool nylon yarn.

2. The preparation process of the cool nylon yarn according to claim 1, characterized in that: According to the mass percentage of the mixture, the seaweed extract is 0.5-2%, the eucalyptus leaf extract is 2-5%, the nitrogen boron fiber is 1-3%, and the jade is 3-6%.

3. The preparation process of the cool nylon yarn according to claim 1, characterized in that: The particle size of the jade is 200-300nm.

4. The preparation process of the cool nylon yarn according to claim 1, characterized in that: The freeze-drying conditions are: vacuum degree 20-35 Pa, temperature (-10° C.) - (-5° C.).

5. The preparation process of the cool nylon yarn according to claim 1, characterized in that: According to the mass percentage of the cooling masterbatch, the mixture is 5-8%, BeO is 15-25%, TiO2 is 15-25%, and the dispersant is 5-10%.

6. The preparation process of the cool nylon yarn according to claim 1, characterized in that: The drying conditions of step 2 are: gas flow rate 400-500m 3 / h, drying temperature 85-95℃, drying time 18-24h.

7. A cool nylon yarn obtained based on the preparation process of the cool nylon yarn according to any one of claims 1 to 6.

8. Application of the cool nylon yarn according to any one of claims 1 to 6 in sportswear.