A method for preparing green and environmentally friendly multifunctional blended yarn

Abstract

This invention discloses a method for preparing a green and environmentally friendly multifunctional blended yarn. The blended yarn is made by blending moisture-wicking and quick-drying fibers with mint fibers in a weight ratio of 50-70:30-50. The yarn is produced through processes such as fiber pretreatment, blending, cleaning and combing, drawing, roving, and spinning. Experimental results show that by rationally setting the blending ratio of moisture-wicking and quick-drying fibers to mint fibers, the blended yarn prepared by this invention is environmentally friendly, has excellent mechanical properties, and high UV resistance. It also possesses moisture-wicking, quick-drying, antibacterial, deodorizing, and insect-repellent properties. Furthermore, the preparation process is simple and easy to implement, reduces energy consumption, shortens the process, and improves safety, meeting the modern demand for multifunctional care yarns and showing broad application prospects.

Description

Technical Field

[0001] This invention belongs to the field of yarn processing, and specifically relates to a method for preparing a green and environmentally friendly multifunctional blended yarn. Background Technology

[0002] Spinning, as an important part of the textile industry, involves a series of processes including loose fiber processing, opening and cleaning, carding (combing), drawing, roving, spinning, dyeing and finishing, and sizing. The entire process involves numerous steps, high energy consumption, and significant pollution. Therefore, the transformation and upgrading of the spinning process, promoting its development towards low energy consumption, high efficiency, and environmental friendliness, is particularly crucial.

[0003] Outdoor activities require prolonged exposure to sunlight, causing the body to secrete more sweat. If not treated promptly, this can lead to the proliferation of bacteria, unpleasant odors, and an increased risk of skin diseases. To improve the protective capabilities and comfort of summer clothing, it is necessary to develop a multifunctional textile that integrates moisture-wicking, UV protection, antibacterial properties, deodorization, and cooling effects.

[0004] With the increasing demand for functional fibers, peppermint fiber, with its unique performance characteristics, is gradually gaining popularity. Peppermint fiber uses cellulose fiber as its matrix, and during the spinning process, it undergoes microencapsulation to incorporate the active ingredient of peppermint (menthol) into the cellulose fiber. During washing and friction, some microcapsules rupture, achieving a long-lasting antibacterial and cooling effect.

[0005] Moisture-wicking and quick-drying fiber is a polyester staple fiber with added nanoparticles. It has a unique cross-shaped cross section, which creates grooves on the fiber surface. It quickly absorbs moisture and sweat from the skin surface through wicking and expels it to the outside, keeping the inside dry and comfortable. The nano-sized ceramic particles widely distributed inside the fiber have a high thermal conductivity, which can improve heat conduction efficiency and provide a cooling effect.

[0006] To promote the green and healthy development of the textile industry, meet the growing needs of people's living standards, and further improve the functionality of fabrics, there are currently no literature reports on the preparation of multifunctional blended yarns by blending the two fibers in a certain proportion and combining them with an improved spinning process. Summary of the Invention

[0007] To address the problems existing in the prior art, the present invention aims to provide a method for preparing green and environmentally friendly multifunctional blended yarn. The blended yarn prepared by this method is not only green, environmentally friendly and safe, but also has good mechanical properties, UV resistance, and wash fastness, while also possessing properties such as cooling sensation, antibacterial, deodorizing, and quick-drying moisture absorption.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] The first aspect of this invention provides a green and environmentally friendly multifunctional blended yarn, wherein the blended yarn is made by ring spinning a moisture-wicking and quick-drying fiber with a mint fiber weight ratio of 50-70:30-50. If the proportion of moisture-wicking and quick-drying fiber is less than 50% or more than 70%, the yarn strength will be reduced. The yarn with the ratio within this range has the optimal tensile strength.

[0010] The second aspect of the present invention provides a method for preparing the above-mentioned green and environmentally friendly multifunctional blended yarn, comprising the following steps:

[0011] S1. Fiber pretreatment process: The peppermint fiber is dyed using a plant dyeing system and then dried; the plant dyeing system is composed of hematoxylin extract, tannic acid, alum and polyvinyl alcohol.

[0012] S2, Fiber Mixing Process: Mix the dyed peppermint fiber with moisture-wicking and quick-drying fiber;

[0013] S3. Combing and cleaning process: The mixed raw fibers are put into the cotton bin of the combing and cleaning machine. The raw fibers are driven by the belt in the feeding box and are torn open by the bar picks. The opened fibers form a uniform cotton web under the action of the photoelectric detection device and the roller pressure roller. Then, they are fed into the carding mechanism and combed by the cylinder, flat plate, bar picks and doffer to obtain the mixed fiber sliver.

[0014] S4. Drawing process: A small-scale drawing machine is used for drawing, with three rollers for drafting. The drafting ratio in the back zone is controlled at 1.1-1.3 times. The speed of the front machine is adjusted, and the speed of the front roller is set to 8-15 m / min. The speed ratio between the front roller and the middle roller is adjusted to control the total drafting ratio between 6 and 10. After two drawing processes, the sliver is stretched and thinned to obtain a mixed cooked sliver.

[0015] S5. Roving process: The mixed sliver is fed into the roving frame and twisted into yarn using the non-free end true twisting method. The yarn is twisted by the rotation of the wing spindle. After being stretched and thinned by the roving frame and twisted and wound, the moisture-wicking and quick-drying / mint fiber blended roving is produced.

[0016] S6. Spinning process: A negative pressure four-roller compact spinning machine is used for spinning. The resulting moisture-wicking and quick-drying / mint fiber blended roving is fed into the cohesive device, and a ball bottle containing plant essential oil is placed in the spinning twisting zone as a yarn functional finishing agent. The high speed of the yarn drives the ball to rotate, so that part of the plant essential oil adheres to the yarn body, helping the yarn hairs to lie flat. The yarn is then twisted and wound on the spinning machine to obtain the moisture-wicking and quick-drying / mint fiber blended yarn.

[0017] Preferably, in step S1, the dyeing treatment of peppermint fiber using a plant dyeing system specifically involves: immersing the peppermint fiber in the plant dyeing system, dyeing it at 80-90℃ for 15-20 minutes, and then drying it; wherein, the liquor ratio is set to 1:10-20, a larger liquor ratio has better effect and better fiber dyeing uniformity, but an excessively large liquor ratio will cause waste of resources, while a liquor ratio lower than 1:10 will lead to insufficient and uneven dyeing.

[0018] Preferably, the hematoxylin extract is obtained by pulverizing sappanwood and soaking it in water at 80-90℃ for 15-20 minutes; the tannic acid is obtained by pulverizing gallnut and soaking it in water at 80-90℃ for 15-20 minutes; the hematoxylin extract and tannic acid selected in this invention can form a conjugated system to give the fiber anti-ultraviolet effect and improve the fiber's antibacterial properties.

[0019] Preferably, the volume ratio of the hematoxylin extract to tannic acid is 1:3-5; if pure tannic acid is used, the color effect is poor, and the improvement of the anti-ultraviolet effect of pure hematoxylin extract is not obvious.

[0020] Preferably, in step S4, a three-roller drafting method is used, and the drafting ratio in the back zone is controlled to be 1.1-1.3 times. This ensures a smaller drafting ratio in the back zone, reduces fiber hooks, and improves the uniformity of sliver thickness. The total drafting ratio of the first drawing pass is set to 6-10, and the front roller speed of the first drawing pass is 8-15 m / min. The total drafting ratio of the last drawing pass is 5-8, and the front roller speed of the last drawing pass is 8-15 m / min. In this invention, the total drafting ratio of the first drawing pass is set to be relatively high, while the total drafting ratio of the last drawing pass is lower than that of the first drawing pass. After two drawing passes, the sliver is stretched and thinned, and the uniformity of the mixing of moisture-wicking and quick-drying fibers and mint fibers is further improved, achieving a mixed sliver with the required thickness and weight. The weight of the mixed sliver is 15-25 g / 5m.

[0021] Preferably, in step S5, the process parameters in the roving process are: roving weight 5-7g / 10m, roving twist coefficient 80-90, to ensure the basic strength of the roving and facilitate the drafting of the fine yarn, and winding loop distance 2-2.5mm, to ensure good forming of the packaged tube.

[0022] Preferably, in step S6, the process parameters in the spinning process are: negative pressure of 2300-2900 Pa and back zone draft of 1.15-1.2 times.

[0023] Preferably, in step S6, the spinning process also uses a yarn fuzz auxiliary gathering device for fuzz gathering and yarn finishing. The yarn fuzz auxiliary gathering device includes a ball bearing bottle, a yarn guide, and a wire traveler. It is performed simultaneously with the spinning process. In the spinning twisting zone, plant essential oil is added as a yarn functional finishing agent through the ball bearing bottle to provide a wet twisting environment. After the fiber bundle passes through the ball bearing, it enters the air ring area between the yarn guide and the wire traveler. The high-speed rotation of the air ring area dries the liquid carried in the fiber bundle, improving fiber aggregation. As the yarn moves, the ball bearing rotates, causing a certain amount of plant essential oil to adhere to the surface of the yarn, giving the yarn a fragrant aroma, assisting in gathering yarn fuzz, and adhering finishing agents. After twisting and winding, a moisture-wicking and quick-drying / mint fiber blended yarn is obtained.

[0024] Preferably, the plant essential oils include, but are not limited to, peppermint essential oil, rose essential oil, and green tea essential oil.

[0025] The present invention has the following beneficial effects:

[0026] The blended yarn prepared by the method of this invention is environmentally friendly, has excellent mechanical properties, and is highly resistant to ultraviolet rays. It also has the functions of quick-drying, antibacterial, deodorizing, and mosquito repellent. The preparation process is simple and easy to implement, reduces energy consumption, shortens the process, and improves safety. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 The graph shows the absorbance test results of the plant dyeing system used in the green and environmentally friendly multifunctional blended yarn in Example 1.

[0029] Figure 2 The figures show the tensile properties test results of the green and environmentally friendly multifunctional blended yarns prepared in Examples 1-4;

[0030] Figure 3 Light transmittance results for green and environmentally friendly multi-functional blended yarn knitted fabrics;

[0031] Figure 4 This is a schematic diagram of a yarn hair-gathering auxiliary device. Detailed Implementation

[0032] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the invention. However, those skilled in the art will understand that the invention may be implemented in other embodiments without these specific details.

[0033] Example 1

[0034] A method for preparing a green and environmentally friendly multifunctional blended yarn, wherein the blended yarn is made of a blend of moisture-wicking and quick-drying fibers and peppermint fibers, wherein the weight ratio of the moisture-wicking and quick-drying fibers to the peppermint fibers is 65:35, includes the following steps:

[0035] S1. Fiber pretreatment process:

[0036] Commercially available sappanwood and gallnut were pulverized into 2-3 mm filaments and pre-washed with room temperature deionized water. The pulverized sappanwood and gallnut were added to deionized water at a mass ratio of 1:20. The temperature was increased to 90℃ at a programmed rate of 5℃ / min and kept at this temperature for 15 min. The mixture was then filtered to obtain hematoxylin extract and gallnut extract (i.e., tannic acid). 5 g of alum was weighed into 100 ml of deionized water and stirred until completely dissolved to obtain an alum solution.

[0037] Weigh 5g of polyvinyl alcohol granules and add them to 200ml of deionized water. Heat and stir until completely dissolved. Then, soak the peppermint fiber in the polyvinyl alcohol solution at 60℃ for 10 minutes. Next, prepare hematoxylin extract, gallnut extract, and alum solution in a volume ratio of 1:4:1. First, add the gallnut extract to the hematoxylin extract and mix well. When the color turns orange-yellow, add the alum solution and shake well. At this point, the solution color turns dark red, and the plant dyeing system is obtained. Take out the peppermint fiber soaked in the polyvinyl alcohol solution and put it into the plant dyeing system for dyeing. Make sure the dye completely covers the fiber. Let it stand at 90℃ for 15 minutes for dyeing. Set the liquor ratio to 1:15. The hydrogel formed by tannic acid and polyvinyl alcohol through hydrogen bonds will precipitate uniformly on the fabric surface to achieve the purpose of color fixation. After dyeing, wash off the excess dye and dry.

[0038] S2, Fiber Mixing Process: Mix the moisture-wicking and quick-drying fibers and the dyed mint fibers according to a set ratio;

[0039] S3. Combing and cleaning process: The mixed raw fibers are put into the cotton bin of the combing and cleaning machine. The raw fibers are driven by the belt in the feeding box and are torn open by the licker-in. The opened fibers form a uniform cotton web under the action of the photoelectric detection device and the roller pressure roller. Then, they are fed into the carding mechanism and combed by the cylinder, flat plate, licker-in, and doffer to obtain the mixed fiber sliver (weight 25.9g / 5m).

[0040] S3. Drawing process: This is carried out on a small-scale drawing frame using a three-roller drafting system. The back zone draft ratio is controlled at 1.3, which ensures a smaller back zone draft ratio, reduces fiber hooks, and improves the uniformity of the finished sliver thickness. The total draft ratio for the first drawing is set to 8, and the front roller speed for the first drawing is 10 m / s. The total draft ratio for the last drawing is 6, and the front roller speed for the last drawing is 8 m / s. In this invention, the total draft ratio for the first drawing is set relatively high, while the total draft ratio for the last drawing is lower than that for the first drawing. After two drawing processes, six slivers are fed into each process. The slivers are stretched and thinned, and the uniformity of the mixing of moisture-wicking and quick-drying fibers and mint fibers is further improved, resulting in a mixed finished sliver (19.8 g / 5 m).

[0041] S4. Roving process: The mixed sliver is fed into the roving frame and twisted into yarn using non-free end true twisting. The yarn is twisted by the rotation of the wing spindle. The roving quantity is set to 6g / 10m, the winding loop distance is 2.5mm, and the roving twist coefficient is 90. After the roving frame is stretched and twisted, the moisture-wicking and quick-drying / mint fiber blended roving is obtained.

[0042] S5. Spinning Process: A negative pressure four-roller compact spinning machine is used, and a yarn hairiness auxiliary gathering device is installed in the spinning twisting zone, as per [reference needed]. Figure 4 The yarn hairiness auxiliary gathering device includes a ball bottle 1, a yarn guide 2, a spindle 3, a bobbin 4, a ring rail 5, a traveler 6, and a front roller nip 7. The ball bottle 1 contains peppermint oil and is placed in the yarn twisting area. The ball bottle 1 contains peppermint oil as a yarn functional finishing agent and is installed in the yarn forming area between the front roller nip and the yarn guide. The position of the ball bottle 1 must be fixed to ensure that the fiber bundle can still contact the ball during the reciprocating motion of the yarn guide 2. The fiber bundle that contacts the ball in the yarn forming area can be covered by the solution on the circumference through an appropriate contact length.

[0043] Specifically, the prepared moisture-wicking and quick-drying / mint fiber blended roving is placed on a scaffold spindle, unwound, and then fed into a fiber cohesion device via a guide rod and a bell mouth. The negative pressure is adjusted to 2400 Pa, and the back zone draft ratio is 1.2. This process is carried out simultaneously with the spinning process. In the spinning twisting zone, peppermint essential oil is added as a yarn functional finishing agent through a ball bearing bottle 1 to provide a wet twisting environment. The yarn movement drives the ball bearings to rotate, and as the ball bearings rotate, they bring the liquid additive from the essential oil bottle to the surface of the fiber bundle. After passing through the ball bearings, the fiber bundle enters the guide rod. The air ring area between device 2 and the steel traveler 6 dries the liquid carried in the fiber bundle through high-speed rotation. As the yarn moves, it drives the ball bearings to rotate, allowing a small amount of peppermint oil to adhere to the yarn surface, increasing fiber cohesion, aiding in the reduction of yarn fuzz, and attaching finishing agents to help the yarn fuzz settle, enriching yarn functionality and improving yarn quality. After twisting and winding on a spinning frame, a moisture-wicking, quick-drying / peppermint fiber blended yarn is produced, spinning 19.7 tex yarn with a twist coefficient of 330, and the yarn color is rose red. The wet twisting method makes twisting easier, fuzz settles more easily, the twist degree is easier to determine, and the twisted surface is smoother. Improvements to the spinning device have enhanced the yarn's aesthetics and practicality, enriching its functional characteristics.

[0044] Example 2

[0045] A method for preparing a green and environmentally friendly multifunctional blended yarn, wherein the blended yarn is made of a blend of moisture-wicking and quick-drying fibers and peppermint fibers, wherein the weight ratio of the moisture-wicking and quick-drying fibers to the peppermint fibers is 55:45, includes the following steps:

[0046] S1. Fiber pretreatment process:

[0047] Hematoxylin extract, gallnut extract, and alum solution: Preparation steps are the same as in Example 1;

[0048] Weigh 5g of polyvinyl alcohol granules and add them to 200ml of deionized water. Heat and stir until completely dissolved. Then, soak the peppermint fiber in the polyvinyl alcohol solution at 60℃ for 10 minutes. Next, prepare hematoxylin extract, gallnut extract, and alum solution in a volume ratio of 1:3:1. First, add the gallnut extract to the hematoxylin extract and mix well. When the color turns orange-yellow, add the alum solution and shake well. At this point, the solution color turns dark red, and the plant dyeing system is obtained. Take out the peppermint fiber soaked in the polyvinyl alcohol solution and put it into the plant dyeing system for dyeing. Make sure the dye completely covers the fiber. Let it stand at 90℃ for 15 minutes for dyeing. Set the liquor ratio to 1:20. The hydrogel formed by tannic acid and polyvinyl alcohol through hydrogen bonds will precipitate uniformly on the fabric surface to achieve the purpose of color fixation. After dyeing, wash off the excess dye and dry.

[0049] S2, Fiber Mixing Process: Mixing moisture-wicking and quick-drying fibers with dyed peppermint fibers;

[0050] S3. Combing and cleaning process: The mixed raw fibers are put into the cotton bin of the combing and cleaning machine. The raw fibers are driven by the belt in the feeding box and are torn open by the bar picks. The opened fibers form a uniform cotton web under the action of the photoelectric detection device and the roller pressure roller. Then, they are fed into the carding mechanism and combed by the cylinder, flat plate, bar picks and doffer to obtain the mixed fiber sliver (weight 23.5g / 5m).

[0051] S4. Drawing Process: Performed on a small-scale drawing frame using a three-roller drafting system. The back zone draft ratio is controlled at 1.2 to ensure a smaller back zone draft ratio, reducing fiber hooks and improving the uniformity of the finished sliver thickness. The total draft ratio for the first drawing pass is set to 8, and the front roller speed for the first drawing pass is 15 m / s. The total draft ratio for the last drawing pass is 6, and the front roller speed for the last drawing pass is 8 m / s. In this invention, the total draft ratio for the first drawing pass is set relatively high, while the total draft ratio for the last drawing pass is lower than that for the first drawing pass. After two drawing passes, six slivers are fed into each pass. The slivers are stretched and thinned, further improving the uniformity of the mixing of moisture-wicking and quick-drying fibers and mint fibers, resulting in a mixed finished sliver (18.5 g / 5 m).

[0052] S5. Roving process: The mixed sliver is fed into the roving frame and twisted into yarn using non-free end true twisting. The yarn is twisted by the rotation of the wing spindle. The roving quantity is set to 5g / 10m, the winding loop distance is 2.5mm, and the roving twist coefficient is 80. After the roving frame is stretched and twisted, the moisture-wicking and quick-drying / mint fiber blended roving is obtained.

[0053] S6. Spinning process: The steps are basically the same as in the example, except that the negative pressure is 2700Pa, the back zone draft ratio is 1.15, 20.8tex yarn is spun, and the twist coefficient is 330.

[0054] Example 3

[0055] A method for preparing a green and environmentally friendly multifunctional blended yarn, wherein the blended yarn is made of a blend of moisture-wicking and quick-drying fibers and peppermint fibers, wherein the weight ratio of the moisture-wicking and quick-drying fibers to the peppermint fibers is 65:35, includes the following steps:

[0056] S1. Fiber pretreatment process:

[0057] Preparation of hematoxylin extract, gallnut extract, and alum solution: The preparation steps are the same as in Example 1;

[0058] Weigh 5g of polyvinyl alcohol granules and add them to 200ml of deionized water. Heat and stir until completely dissolved. Then, soak the peppermint fiber in the polyvinyl alcohol solution at 60℃ for 10 minutes. Next, prepare hematoxylin extract, gallnut extract, and alum solution in a volume ratio of 1:5:1. First, add the gallnut extract to the hematoxylin extract and mix well. When the color turns orange-yellow, add the alum solution and shake well. At this point, the solution color turns dark red, and the plant dyeing system is obtained. Take out the peppermint fiber soaked in the polyvinyl alcohol solution and put it into the plant dyeing system for dyeing. Make sure the dye completely covers the fiber. Let it stand at 80℃ for 20 minutes for dyeing. Set the liquor ratio to 1:10. The hydrogel formed by tannic acid and polyvinyl alcohol through hydrogen bonds will precipitate uniformly on the fabric surface to achieve the purpose of color fixation. After dyeing, wash off the excess dye and dry.

[0059] S2, Fiber Mixing Process: Mixing moisture-wicking and quick-drying fibers with dyed peppermint fibers;

[0060] S3. Combing and cleaning process: The mixed raw fibers are put into the cotton bin of the combing and cleaning machine. The raw fibers are driven by the belt in the feeding box and are torn open by the bar picks. The opened fibers form a uniform cotton web under the action of the photoelectric detection device and the roller pressure roller. Then, they are fed into the carding mechanism and combed by the cylinder, flat plate, bar picks and doffer to obtain the mixed fiber sliver (weight 26.2g / 5m).

[0061] S4. Drawing Process: Performed on a small-scale drawing frame using a three-roller drafting system. The back zone draft ratio is controlled at 1.1 to ensure a smaller back zone draft ratio, reducing fiber hooks and improving the uniformity of the sliver thickness. The total draft ratio for the first drawing is set to 10, and the front roller speed for the first drawing is 15 m / s. The total draft ratio for the last drawing is set to 8, and the front roller speed for the last drawing is 15 m / s. In this invention, the first drawing is set with a higher total draft ratio, while the total draft ratio for the last drawing is lower than that of the first drawing. After two drawing processes, six slivers are fed into each process. The slivers are stretched and thinned, further improving the uniformity of the mixing of moisture-wicking and quick-drying fibers and mint fibers, resulting in a mixed sliver (20.5 g / 5 m).

[0062] S5. Roving process: The mixed sliver is fed into the roving frame and twisted into yarn using non-free end true twisting. The yarn is twisted by the rotation of the wing spindle. The roving quantity is set to 7g / 10m and the winding loop distance is 2.2mm. After the roving frame is stretched and twisted, the moisture-wicking and quick-drying / mint fiber blended roving is produced with a roving twist coefficient of 86.

[0063] S6. Spinning process: The steps are basically the same as in the example, except that the negative pressure is about 2320Pa, the back zone draft ratio is 1.2, 19.4tex yarn is spun, and the twist coefficient is 323.

[0064] Example 4

[0065] A method for preparing a green and environmentally friendly multifunctional blended yarn, wherein the blended yarn is made of a blend of moisture-wicking and quick-drying fibers and peppermint fibers, wherein the weight ratio of the moisture-wicking and quick-drying fibers to the peppermint fibers is 75:25, includes the following steps:

[0066] S1. Fiber pretreatment process:

[0067] Preparation of hematoxylin extract, gallnut extract, and alum solution: The preparation steps are the same as in Example 1;

[0068] Weigh 5g of polyvinyl alcohol granules and add them to 200ml of deionized water. Heat and stir until completely dissolved. Then, soak the peppermint fiber in the polyvinyl alcohol solution at 60℃ for 10 minutes. Next, prepare hematoxylin extract, gallnut extract, and alum solution in a volume ratio of 1:3:1. First, add the gallnut extract to the hematoxylin extract and mix well. When the color turns orange-yellow, add the alum solution and shake well. At this point, the solution color turns dark red, and the plant dyeing system is obtained. Take out the peppermint fiber soaked in the polyvinyl alcohol solution and put it into the plant dyeing system for dyeing. Make sure the dye completely covers the fiber. Let it stand at 85℃ for 18 minutes for dyeing. Set the liquor ratio to 1:15. Let the hydrogel formed by tannic acid and polyvinyl alcohol through hydrogen bonds precipitate uniformly on the fabric surface to achieve the purpose of color fixation. After dyeing, wash off the excess dye and dry.

[0069] S2, Fiber Mixing Process: Mixing moisture-wicking and quick-drying fibers with dyed peppermint fibers;

[0070] S3. Combing and cleaning process: The mixed raw fibers are put into the cotton bin of the combing and cleaning machine. The raw fibers are driven by the belt in the feeding box and are torn open by the bar picks. The opened fibers form a uniform cotton web under the action of the photoelectric detection device and the roller pressure roller. Then, they are fed into the carding mechanism and combed by the cylinder, flat plate, bar picks and doffer to obtain the mixed fiber sliver (weight 25.3g / 5m).

[0071] S4. Drawing Process: Performed on a small-scale drawing frame using a three-roller drafting system. The back zone draft ratio is controlled at 1.3 to ensure a smaller back zone draft ratio, reducing fiber hooks and improving the uniformity of the finished sliver thickness. The total draft ratio for the first drawing pass is set to 6, and the front roller speed for the first drawing pass is 8 m / s. The total draft ratio for the last drawing pass is 5, and the front roller speed for the last drawing pass is 12 m / s. In this invention, the first drawing pass is set with a higher total draft ratio, while the total draft ratio for the last drawing pass is lower than that of the first. After two drawing passes, six slivers are fed into each pass. The slivers are stretched and thinned, further improving the uniformity of the mixing of moisture-wicking and quick-drying fibers and mint fibers, resulting in a mixed finished sliver (22.1 g / 5 m).

[0072] S5. Roving process: The mixed sliver is fed into the roving frame and twisted into yarn using non-free end true twisting. The yarn is twisted by the rotation of the wing spindle. The roving quantity is set to 6g / 10m, the winding loop distance is 2mm, and the roving twist coefficient is 90. After the roving frame is stretched and twisted, the moisture-wicking and quick-drying / mint fiber blended roving is obtained.

[0073] S6. Spinning process: The steps are basically the same as in the example, except that the negative pressure is about 2860Pa, the back zone draft ratio is 1.18, 20.9tex yarn is spun, and the twist coefficient is 330.

[0074] See Figure 1 and Figure 2 The figures show the absorbance and transmittance (UV protection effect) results of the plant dyeing system used to prepare the green and environmentally friendly multifunctional blended yarn in Example 1.

[0075] Depend on Figure 1 and Figure 2 The results show that the plant staining system developed in this invention has excellent light absorption properties and UV protection.

[0076] The green and environmentally friendly multifunctional blended yarns prepared in Examples 1-4 were processed using a circular knitting machine to obtain finished fabrics, and their mechanical properties were tested. The specific results are shown in Table 1.

[0077] Table 1. Mechanical properties of blended yarns

[0078]

[0079] As shown in Table 1, the blended yarns prepared in Examples 1-4 have excellent mechanical properties and all meet the requirements of national standards.

[0080] The antibacterial properties of the blended yarns obtained in Examples 1-4 were tested, and the results are shown in Table 2 below.

[0081] Table 2. Antibacterial performance test

[0082]

[0083] Note: 1: Antibacterial rate ≥ 99%; 2: Antibacterial rate ≥ 90%; 3: Antibacterial rate ≥ 50%; 4: Antibacterial rate < 50%.

[0084] As shown in Table 2, the knitted fabrics made from the blended yarns prepared in Examples 1-4 have excellent antibacterial properties and meet the standard requirements.

[0085] The blended yarns obtained in Examples 1-4 were tested for wash fastness, and the results are shown in Table 3 below.

[0086] Table 3. Wash fastness test

[0087]

[0088] As shown in Table 3, the knitted fabrics made from the blended yarns prepared in Examples 1-4 exhibit outstanding wash fastness and meet the standard requirements.

[0089] This invention is not limited to the specific embodiments described above. Any modifications made by those skilled in the art based on the above concept without creative effort are within the scope of protection of this invention.

Claims

1. A method for preparing a green and environmentally friendly multifunctional blended yarn, characterized in that, The blended yarn is made by blending moisture-wicking and quick-drying fibers with mint fibers through a ring spinning process, and the weight ratio of the moisture-wicking and quick-drying fibers to the mint fibers is 50-70:30-50. Its preparation method includes the following steps: S1. Fiber pretreatment process: The peppermint fiber is dyed using a plant dyeing system and then dried; the plant dyeing system is composed of hematoxylin extract, tannic acid, alum and polyvinyl alcohol, and the volume ratio of hematoxylin extract to tannic acid is 1:3-5. The specific steps for dyeing peppermint fibers using a plant dyeing system are as follows: immerse the peppermint fibers in the plant dyeing system, dye them at 80-90℃ for 15-20 minutes, and then dry them; wherein the liquor ratio is set to 1:10-20. S2, Fiber Mixing Process: Mix the dyed peppermint fiber with moisture-wicking and quick-drying fiber; S3. Combing and cleaning process: The mixed raw fibers are put into the cotton bin of the combing and cleaning machine. The raw fibers are driven by the belt in the feeding box and are torn open by the bar picks. The opened fibers form a uniform cotton web under the action of the photoelectric detection device and the roller pressure roller. Then, they are fed into the carding mechanism and combed by the cylinder, flat plate, bar picks and doffer to obtain the mixed fiber sliver. S4. Drawing process: This is carried out on a small-scale drawing machine, using a three-roller drafting method. After two drawing processes, the fiber blend sliver is stretched and thinned to obtain a blended sliver. S5. Roving process: The mixed sliver is fed into the roving frame and twisted into yarn using the non-free end. The mixed sliver is twisted by the rotation of the wing spindle. After drafting and twisting, the moisture-wicking and quick-drying / mint fiber blended roving is produced. S6. Spinning process: A negative pressure four-roller compact spinning machine is used for spinning. The resulting moisture-wicking and quick-drying / mint fiber blended roving is fed into the cohesive device, and a ball bottle containing plant essential oil is placed in the spinning twisting area as a yarn functional finishing agent. The high speed of the yarn drives the ball to rotate, so that part of the plant essential oil is attached to the yarn body, which helps the yarn hairs to lie flat. The yarn is then twisted and wound on the spinning machine to obtain the moisture-wicking and quick-drying / mint fiber blended yarn. In step S6, a yarn fuzz-reducing auxiliary device for yarn fuzz reduction and finishing is also used. The yarn fuzz-reducing auxiliary device includes a ball bearing bottle, a yarn guide, and a wire traveler. It is performed simultaneously with the spinning process. In the spinning twisting zone, plant essential oil is added as a yarn functional finishing agent through the ball bearing bottle to provide a wet twisting environment. After passing through the ball bearing, the fiber bundle enters the air ring area between the yarn guide and the wire traveler. The high-speed rotation of the air ring area dries the liquid carried in the fiber bundle. As the yarn moves, the ball bearing rotates, causing the plant essential oil to adhere to the surface of the yarn, assisting in reducing yarn fuzz and adhering the finishing agent. After twisting and winding, a moisture-wicking and quick-drying / mint fiber blended yarn is obtained.

2. The method for preparing green and environmentally friendly multifunctional blended yarn according to claim 1, characterized in that, In step S4, the process parameters for the drawing process are as follows: the back zone draft ratio is 1.1-1.3, the total draft ratio for the first drawing is 6-10, the front roller speed for the first drawing is 8-15 m / min, the total draft ratio for the last drawing is 5-8, the front roller speed for the last drawing is 8-15 m / min, and the quantitative weight of the mixed cooked strip is 15-25 g / 5 m.

3. The method for preparing green and environmentally friendly multifunctional blended yarn according to claim 1, characterized in that, In step S5, the process parameters for the roving process are: roving weight is 5-7g / 10m, roving twist coefficient is 80-90, and winding distance is 2-2.5mm.

4. The method for preparing green and environmentally friendly multifunctional blended yarn according to claim 1, characterized in that, In step S6, the process parameters in the spinning process are: negative pressure of 2300-2900 Pa, back zone draft ratio of 1.15-1.2, spinning twist coefficient of 300-350, and spinning twist direction of "Z" twist.

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