Preparation method of moisture-absorbing and quick-drying fabric

Abstract

The invention provides a preparation method of a moisture-absorption quick-dry fabric, which comprises the following steps: S10: heating and melting polyester chips, extruding a melt by using a spinneret plate, enabling the melt to generate volume expansion by using a phase change expansion process in the extrusion process, and cooling and curing to obtain microporous fibers; s20, compact siro spinning or ring spinning equipment is adopted for spinning the microporous fibers, the twist degree of the yarn is set to be within the range of 6 twists / cm to 16 twists / cm, twisting is conducted, and the moisture-absorbing and quick-drying yarn with the fineness being 20 s to 120 s is prepared; and S30, weaving by adopting a knitting plaiting process, feeding and weaving hydrophobic polyester filament yarns as ground yarns on the inner layer of the fabric, and feeding and weaving moisture-absorbing quick-drying yarns as surface yarns on the outer layer of the fabric. The moisture-absorbing and quick-drying fabric prepared by the preparation method is good in moisture-absorbing and quick-drying effect durability and excellent in moisture-absorbing performance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of moisture absorption and quick-drying fabric, and particularly relates to a preparation method of moisture absorption and quick-drying fabric. BACKGROUND

[0002] During exercise, a large amount of sweat is produced by the human body. If the clothing fabric cannot timely discharge the sweat and keep dry, the accumulated sweat will cause the clothes to adhere to the skin, resulting in a stuffy and cold feeling, which seriously affects the wearing comfort and the exercise experience. At present, the methods for improving the moisture absorption and quick-drying performance of fabrics mainly include chemical modification and physical modification. The chemical modification mainly includes post-finishing of hydrophilic auxiliaries or grafting of hydrophilic groups on the fabric. Although this method can endow the fabric with moisture absorption, the hydrophilic auxiliaries are easy to fall off in the washing process, resulting in rapid decay of the function with the increase of washing times. The physical modification mainly constructs surface grooves by changing the cross-sectional shape of the fiber (such as cross-shaped and Y-shaped), and uses the capillary effect generated by the grooves to conduct water. Although this method is permanent, it only relies on the grooves on the outer surface of the fiber, and the specific surface area and capillary pressure are limited, so there is a bottleneck in the moisture conduction efficiency in the case of a large amount of sweat. SUMMARY

[0003] The present application aims to overcome the above-mentioned defects or problems in the background art, and provide a preparation method of moisture absorption and quick-drying fabric. The moisture absorption and quick-drying fabric prepared by the preparation method has good durability and excellent moisture absorption performance.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical solutions: Technical solution one: A preparation method of moisture absorption and quick-drying fabric, comprising the following steps: S10: heating and melting polyester chips, extruding the melt by using a spinneret, and making the melt volume expand by using a phase change puffing process in the extrusion process, to obtain micro-porous fibers after cooling and solidification; S20: spinning the micro-porous fibers by using compact siro spinning or ring spinning equipment, setting the yarn twist in the range of 6 twists / cm-16 twists / cm for twisting, to obtain moisture absorption and quick-drying yarn with fineness of 20s-120s; S30: weaving by using a knitting plating process, feeding and weaving hydrophobic polyester filaments as ground yarn in the inner layer of the fabric, and feeding and weaving the moisture absorption and quick-drying yarn as face yarn in the outer layer of the fabric.

[0005] Technical solution two based on technical solution one: in step S10, the melt is extruded through a spinneret with cross-shaped or Y-shaped spinneret holes.

[0006] Technical solution three based on technical solution one: in step S20, the micro-porous fibers are spun as a single raw material, or the micro-porous fibers are mixed with bamboo fibers or Tencel with a weight ratio of 10%-30% for spinning.

[0007] Technical Solution 4 based on Technical Solution 1: In step S30, the selected hydrophobic ordinary polyester filament has a specification of 75D-100D.

[0008] Technical Solution 5 based on Technical Solution 1: In step S30, the knitting structure of the knitting machine is set as plain knit, tuck knit, yarn-adding knit, or composite knit.

[0009] Technical Solution Six based on Technical Solution One: In step S30, the bending depth and loop density of the knitting machine are adjusted to obtain a fabric with a weight of 180g / m²-220g / m² and a thickness of 0.4mm-0.7mm.

[0010] Technical solution seven based on technical solution six: In step S30, the bending depth and loop density of the knitting machine are adjusted to obtain a fabric with a warp density of 80-105 warp rows / 5cm and a weft density of 75-95 warp rows / 5cm.

[0011] Technical solution eight based on technical solution one: In step S30, the knitting machine is set to perform a composite knitting of tuck stitch and plain knit, the face yarn is controlled to feed the moisture-wicking and quick-drying yarn into the tuck stitch, and the ground yarn is controlled to feed the hydrophobic ordinary polyester filament into the plain knit.

[0012] Technical Solution Nine based on Technical Solution Eight: In step S30, the bending depth and loop density of the knitting machine are adjusted to obtain a fabric with a weight of 190g / m²-210g / m², a thickness of 0.6mm-0.7mm, a warp density of 80-90 rows / 5cm, and a weft density of 85-95 rows / 5cm. As can be seen from the above description of the present invention, compared with the prior art, the present invention has the following beneficial effects: Technical Solution 1 relates to a method for preparing a moisture-wicking and quick-drying fabric. The fabric prepared by this method exhibits excellent moisture-wicking and quick-drying properties, and its moisture-wicking and quick-drying performance is long-lasting and does not diminish with washing. Specifically, this solution utilizes physical phase change swelling technology to construct interconnected micron-sized pores within and on the surface of the fiber. The small pore size of these micropores generates significant Laplace capillary pressure, resulting in superior liquid absorption dynamics and water storage capacity compared to grooves on the surface of conventional irregularly shaped cross-section fibers. However, due to the large number of pores within these microporous fibers, their mechanical structure is relatively loose, and their resistance to lateral pressure is weak. In traditional short-fiber spinning processes, high twist is typically required to ensure yarn strength. The radial compression force generated by this high twist can easily cause the microporous structure within the fiber to collapse or close, causing the fiber to lose its original microporous moisture-wicking function after being made into yarn. Furthermore, although fibers with microporous structures have a large water absorption capacity, if they are directly woven into homogeneous fabrics, the fabric will absorb a large amount of water and remain moist for a long time after absorbing moisture. This type of fabric, which absorbs water tightly against the skin, can easily cause a severe feeling of dampness, coldness, and stickiness, thus reducing wearing comfort. Therefore, this solution specifically uses compact Siro spinning or ring spinning equipment. However, unlike conventional spinning processes that use high twist to pursue high strength, this solution strictly limits the yarn twist to a low twist range of 6 twists / cm to 16 twists / cm. By limiting the low twist parameter, the radial pressure during yarn formation is significantly reduced. Simultaneously, to address the problem that low twist often leads to insufficient yarn strength and excessive hairiness, this solution utilizes the unique airflow gathering or double-bundle twisting mechanism of compact spinning or Siro spinning equipment to make the fibers more compact and straighter before twisting, using the tight cohesion between fibers to compensate for the strength loss caused by low twist. Furthermore, to address the problem of microporous fibers absorbing a lot of water and easily causing the fabric to become damp, cold, and sticky, this solution uses a knitting layering process to construct an asymmetrical structure with a looser inner layer and a denser outer layer. By weaving hydrophobic polyester filaments as the ground yarn into the inner layer and microporous moisture-wicking and quick-drying yarns as the face yarn into the outer layer, the ultra-strong capillary adsorption force generated by the extremely small pore size of the outer layer microporous fibers creates a significant capillary pressure difference with the larger fiber gaps in the inner layer. This differential capillary effect overcomes gravity and adsorption resistance, actively pumping sweat from the inner layer to the outer layer and accelerating evaporation. This allows the skin-adhesive layer to remain relatively dry even with heavy sweating, effectively preventing the fabric from sticking to the skin due to moisture backflow.

[0013] In technical solution two, by using a spinneret with cross-shaped or Y-shaped spinneret holes for extrusion, the microporous fibers acquire an irregular cross-section, thereby introducing external longitudinal grooves. Conventional irregularly shaped fibers rely solely on surface grooves for moisture conduction, while the irregularly shaped microporous fibers of this solution have micropores inside and grooves on the outside, forming a dual moisture conduction mechanism: the internal micropores provide high adsorption capacity and water storage capacity, while the external grooves utilize open capillary effects to accelerate the spread of water along the fiber axis. This synergistic effect significantly increases the contact surface area between water and air, further improving the evaporation rate and diffusion efficiency of water compared to microporous fibers with a circular cross-section.

[0014] In technical solution three, microporous fibers are blended with 10%-30% bamboo fiber or Tencel, improving the skin-friendliness of the resulting fabric. Bamboo fiber or Tencel has a naturally high moisture regain, providing excellent coolness and softness upon contact, but its drying speed is relatively slow. This solution, by controlling the blending ratio within the range of 10%-30%, utilizes the hydrophilic properties of cellulose fibers to improve the moisture-absorbing feel of the fabric upon contact with the skin and eliminate static electricity, while avoiding a decrease in the overall drying rate caused by excessive water retention of high-proportion cellulose fibers.

[0015] In technical solution four, hydrophobic ordinary polyester filaments of 75D-100D are selected as the inner layer yarn. The filament diameter of this specification is relatively large, resulting in larger physical gaps between the inner layer fibers after weaving. By increasing the radius of these inner layer fiber gaps, not only is the capillary retention force of the inner layer on water reduced, but more importantly, the difference between the inner layer gap radius and the outer layer micropore radius is significantly increased. This expanded radius difference further enhances the positive capillary pressure gradient from the inside out, making the force of sweat migrating to the outer layer against gravity and resistance stronger.

[0016] In technical solution five, plain knit, tuck, yarn-padded, or composite weave structures are set. Different weave structures can be combined with yarn-padded processes to adjust the surface texture and density of the fabric, ensuring that the hydrophobic ground yarn and hydrophilic surface yarn can maintain a stable coverage relationship in different application scenarios.

[0017] In technical solution six, the fabric weight is controlled at 180g / m²-220g / m², and the thickness is controlled at 0.4mm-0.7mm. The appropriate weight and thickness can not only accommodate a large amount of sweat and prevent backflow, but also reduce the burden on the fabric and ensure rapid dissipation of moisture and heat.

[0018] In technical solution seven, by adjusting the coil density to achieve a warp density of 80-105 rows / 5cm and a weft density of 75-95 columns / 5cm, the weaving density is kept within a suitable range. This ensures that the inner layer of hydrophobic yarn and the outer layer of microporous yarn are physically closely bonded, guaranteeing a continuous liquid conduction path and allowing the suction force generated by the micropores to effectively act on the inner layer of sweat.

[0019] Technical Solution 8 employs a composite knitting method combining tuck stitch and plain knit, creating a tuck mesh structure on the outer layer and maintaining a plain knit structure on the inner layer. The tuck stitch forms a three-dimensional honeycomb-like pore structure on the outer surface of the fabric. This not only significantly increases the contact area between the outer layer's microporous yarns and the airflow, accelerating the physical evaporation of moisture, but also establishes a more direct water-conducting channel in the thickness direction due to the elongated loop structure formed by the tuck stitch. Combined with a smooth and dense hydrophobic barrier layer on the inner layer, this creates a composite structure with a loose and breathable outer layer and a dense and moisture-proof inner layer, further improving the overall drying rate of the fabric, making it particularly suitable for high-intensity sweat-wicking sports activities.

[0020] In technical solution nine, based on the clustered composite structure, the parameters are further refined. The optimized parameter range ensures that the mesh structure can still maintain a three-dimensional open shape after absorbing moisture, and will not collapse and close due to the increase in weight caused by water absorption. This ensures that it still has stable high evaporation efficiency and good shape retention in high humidity environments. Detailed Implementation

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are preferred embodiments of the present invention and should not be considered as excluding other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0022] In the claims and description of this invention, the terms "comprising," "having," and variations thereof are used to mean "including but not limited to."

[0023] Example This invention relates to a method for preparing a moisture-wicking and quick-drying fabric, which mainly includes the following steps: S10: Polyester chips are heated and melted, and the melt is extruded using a spinneret. During the extrusion process, the melt is expanded in volume using a phase change expansion process. After cooling and solidification, microporous fibers are obtained. S20: The microporous fibers are spun using compact Siro spinning or ring spinning equipment, and the yarn twist is set in the range of 6 twists / cm-16 twists / cm to obtain a moisture-wicking and quick-drying yarn with a fineness of 20s-120s. S30: The fabric is woven using a knitting yarn-adding process, in which hydrophobic polyester filament is fed in as ground yarn and woven into the inner layer of the fabric, and the moisture-wicking and quick-drying yarn is fed in as face yarn and woven into the outer layer of the fabric.

[0024] The following provides a detailed explanation of each step.

[0025] First, step S10 will be explained in detail. The purpose of step S10 is to prepare polyester fibers with interconnected micropores distributed on both the bulk and surface using physical modification methods, providing a physical basis for the moisture-wicking and quick-drying properties of the subsequent fabric. This step specifically includes four main process steps: raw material preparation, melt plasticizing, extrusion puffing, and cooling and setting.

[0026] In the raw material preparation stage, semi-dull polyethylene terephthalate (PET) chips are selected as the matrix material for the fibers. To ensure the stability of spinning and the quality of fiber formation, the intrinsic viscosity of the selected polyester chips is controlled between 0.64 dL / g and 0.68 dL / g, and the melting point is approximately 258℃. Simultaneously, a physical foaming masterbatch is selected as the pore-forming agent. This masterbatch uses low-density polyethylene or polypropylene as a carrier and internally encapsulates 20% by mass of azodicarbonamide or sodium bicarbonate microcapsules as a foaming agent. Its decomposition temperature range is 205℃ to 210℃. During the mixing process, the polyester chips and foaming masterbatch are fed into a high-speed mixer at a mass ratio of 100:2.5 to 100:4.0 for uniform mixing, and then vacuum dried to remove moisture and prevent polyester degradation at high temperatures.

[0027] In the melt plasticizing stage, the dried mixture is conveyed to the screw extruder. The temperature settings of the heating zones in the screw extruder are gradient-distributed, with zone one set at 260℃, zone two at 275℃, zone three at 280℃, and zone four at 285℃. Under the shearing and heating action of the screw, the polyester chips are completely melted, while the foaming agent decomposes upon heating, producing nitrogen or carbon dioxide gas. To ensure that the gas does not escape prematurely, the melt pressure inside the screw is maintained at a high pressure of 13MPa to 15MPa, so that the decomposition gas is forcibly compressed and uniformly dissolved in the polyester melt, forming a homogeneous gas-containing melt system.

[0028] In the extrusion and expansion stage, the gas-containing melt is precisely metered by a metering pump and then enters the spinning box, where the temperature is maintained at approximately 282°C. The melt is pushed into an assembly equipped with a spinneret with a specific orifice shape. The instant the high-pressure melt flows through the spinneret orifice and exits from the outlet, the ambient pressure drops dramatically from tens of megapascals inside the assembly to atmospheric pressure. This enormous pressure drop disrupts the gas's dissolution equilibrium, causing the gases originally dissolved in the melt to undergo a rapid phase change and instantaneous volume expansion. These gases nucleate and grow inside and on the surface of the polyester melt, thus expanding the polymer matrix and forming numerous micron-sized bubble structures. The shape of the spinneret orifice can be selected as circular, cross-shaped, or Y-shaped as needed. When a cross-shaped or Y-shaped spinneret orifice is used, the resulting fiber will possess a microporous structure while also exhibiting longitudinal groove characteristics with an irregular cross-section.

[0029] In the cooling, shaping, and post-processing stages, the freshly extruded fine stream enters a side-blowing window. Under the action of side-blowing air at a temperature of 20℃ and a wind speed of 0.55m / s, the melt rapidly cools and solidifies, freezing and fixing the microporous structure formed by expansion within the fiber, creating open-cell interconnected micropores with diameters ranging from 0.5μm to 3.0μm. The solidified filament bundle undergoes oiling and winding processes to produce pre-oriented yarn (POY). Subsequently, the pre-oriented yarn is fed into a texturing machine for draw-textured processing (DTY). The temperature of the texturing chamber is controlled at 170℃ to prevent excessive temperature from causing micropore closure. The final wound shape is the microporous moisture-wicking quick-drying polyester fiber.

[0030] Next, step S20 will be described in detail. The purpose of step S20 is to process the microporous fibers prepared in the aforementioned steps into moisture-wicking and quick-drying yarns with specific structures and properties. This step includes the pretreatment of raw materials, roving preparation, and spinning.

[0031] Before spinning, the composition of the raw materials is first determined according to product requirements. If pure yarn is to be prepared, the microporous fiber obtained in step S10 is directly fed into the production line as a single raw material; if blended yarn is to be prepared, the microporous fiber is mixed with bamboo fiber or Tencel in a predetermined weight ratio, wherein the weight ratio of bamboo fiber or Tencel is controlled between 10% and 30%, and the weight ratio of microporous fiber is 70% to 90% accordingly. The selected fiber raw materials need to go through the opening and cleaning, carding, drawing and roving processes to comb the messy fibers into parallel and straight fiber slivers, and further draw them into rovings to prepare for the spinning process.

[0032] The spinning process is the core of this step, using either compact Siro spinning equipment or ring spinning equipment. In the preferred compact Siro spinning process, the sliver output from the roving after drafting passes through a negative pressure aggregation zone before twisting. The airflow's adsorption effect causes the fiber bundles to contract laterally and align tightly, significantly eliminating the triangular zone, reducing hairiness, and thus improving fiber cohesion. This aggregation provides a strength foundation for subsequent low-twist processes.

[0033] In the twisting stage, the twisting parameters of the spinning machine are strictly controlled. By adjusting the ratio of spindle speed to front roller output speed, the yarn twist is set within a low twist range of 6 twists / cm to 16 twists / cm. Unlike the high twist typically used in conventional spinning, the low twist parameters used in this step significantly reduce the radial centripetal pressure generated during twisting, preventing excessive pressure from crushing the microporous structure inside and on the surface of the fiber, thus preserving the fiber's moisture absorption channels while forming the yarn. Finally, by controlling the draft ratio, the yarn is processed into a moisture-wicking and quick-drying yarn with a fineness in the range of 20s to 120s, and wound into cones for subsequent weaving.

[0034] Finally, step S30 will be described in detail. Step S30 mainly involves using a knitting and yarn-adding process to weave the aforementioned prepared yarn into a double-layer fabric with unidirectional moisture-wicking function. In this step, it is first necessary to clearly distinguish and select the weaving raw materials. The outer layer of the fabric uses the microporous moisture-wicking and quick-drying yarn obtained in step S20, which provides strong capillary adsorption force through its microporous structure; the inner layer of the fabric uses hydrophobic polyester filaments with a specification of 75D to 100D. The filaments of this specification are relatively thick, which can form larger fiber gaps, and their hydrophobic properties help keep the skin-contacting surface dry.

[0035] The weaving process takes place on a knitting machine equipped with a yarn feeding device. Hydrophobic polyester filament is used as the ground yarn, threaded through the ground yarn guide of the knitting machine, and woven onto the inside of the fabric, i.e., the reverse side of the process. Simultaneously, microporous moisture-wicking and quick-drying yarn is used as the face yarn, threaded through the face yarn guide of the knitting machine, and woven onto the outside of the fabric, i.e., the right side of the process. During loop formation, the tension and feeding angle of the ground and face yarns are controlled to ensure that the face yarn loops stably cover the ground yarn loops. This asymmetrical feeding and weaving method creates a clear structural layering in the fabric thickness direction, making the equivalent radius of the outer layer micropores significantly smaller than the physical gaps between the inner layer fibers, thus forming a moisture-wicking gradient structure from the inside out.

[0036] Depending on the application requirements, the knitting structure of the knitting machine can be set to plain knit, tuck knit, pile knit, or a composite knit. In a preferred embodiment, a knitting method combining tuck and plain knit is used. Specifically, the yarn guide is controlled to feed microporous, moisture-wicking, and quick-drying yarn to knit the tuck knit, creating a three-dimensional mesh structure on the fabric surface and increasing the evaporation area; simultaneously, the yarn guide is controlled to feed hydrophobic ordinary polyester filament to knit the plain knit, keeping the inner layer of the fabric dense and smooth.

[0037] To ensure the fabric has suitable water absorption and breathability, it is necessary to precisely control the fabric's physical properties by adjusting process parameters such as yarn bending depth, tension, and loop density on the knitting machine. Under normal settings, adjusting these parameters results in a fabric weight between 180g / m² and 220g / m², a thickness between 0.4mm and 0.7mm, a transverse density of 80 to 105 warp rows per 5cm, and a longitudinal density of 75 to 95 rows per 5cm. If the aforementioned tuck and plain knit composite structure is used, to maintain the mechanical stability of the mesh structure, the process parameters are further optimized to achieve a fabric weight between 190g / m² and 210g / m², a thickness between 0.6mm and 0.7mm, a transverse density of 80 to 90 warp rows per 5cm, and a longitudinal density of 85 to 95 rows per 5cm.

[0038] After the woven fabric is finished, it undergoes conventional physical processing steps such as pre-setting, dyeing, and stretching to obtain the desired fabric.

[0039] The following specific embodiment illustrates the preparation method.

[0040] In the first stage, the microporous fiber preparation stage, semi-dull polyethylene terephthalate (PET) chips with an intrinsic viscosity of 0.65 dL / g were selected as the matrix material, and polyethylene masterbatch containing 20% ​​azodicarbonamide foaming agent was selected as the pore-forming agent. The polyester chips and foaming masterbatch were mixed uniformly at a mass ratio of 100:3.0 and then fed into a screw extruder. The screw temperature was set to a gradient heating mode of 260℃ to 285℃ in each zone, allowing the mixture to completely melt. The gas generated by the decomposition of the foaming agent was forcibly dissolved in the melt under a screw pressure of 14 MPa. Subsequently, the melt entered a spinning box at a temperature of 282℃ and was extruded through a spinneret with cross-shaped orifices. At the moment the melt flowed out of the spinneret, the huge pressure drop triggered a phase change expansion of the dissolved gas, creating numerous interconnected micropores with a diameter of approximately 1.5 micrometers inside and on the surface of the fiber. The freshly extruded filaments are cooled and cured by side blowing, oiled and wound to obtain pre-oriented filaments, and then subjected to a low-temperature texturing process at 170℃ to finally obtain microporous modified polyester staple fibers with a cross-shaped cross section and a single filament fineness of 1.5D.

[0041] In the second stage, the spinning stage of the moisture-wicking and quick-drying yarn, a blending process is used to balance the fabric's hand feel and moisture absorption. The microporous modified polyester staple fiber prepared above is mixed with bamboo fiber at a weight ratio of 80:20. After opening, cleaning, carding, drawing, and roving processes, the roving is fed into a compact Sirospinning machine. During the spinning process, the negative pressure airflow of the compact spinning device is used to eliminate hairiness in the triangular area, and the twist of the spinning machine is strictly set to 9 twists / cm (i.e., 900 twists / m). This low twist parameter ensures yarn strength while maximizing the preservation of the microporous structure inside the fiber from being crushed by mechanical stress. Finally, a microporous blended moisture-wicking and quick-drying yarn with a fineness of 40S is spun.

[0042] In the third stage, the gradient fabric weaving stage, a 28-gauge / inch (28G) single-jersey circular knitting machine is used. A plain knit weave is employed, using 75D / 72F ordinary semi-dull hydrophobic polyester filament as the ground yarn, threaded through the ground yarn guide and woven into the inner layer of the fabric (reverse side of the process); simultaneously, the aforementioned 40S microporous blended yarn is used as the face yarn, threaded through the face yarn guide and woven into the outer layer of the fabric (right side of the process). During the weaving process, the bending depth and tension are adjusted to ensure that the hydrophilic face yarn tightly covers the hydrophobic ground yarn. After finishing, the greige fabric undergoes pre-setting, high-temperature overflow dyeing, washing, and 170℃ stretching and setting treatment. No hydrophilic auxiliaries are added during the entire finishing process.

[0043] The final fabric has a weight of 190 g / m², a thickness of 0.55 mm, a transverse density of 95 warp rows per 5 cm, and a longitudinal density of 85 weft rows per 5 cm. The fabric has a hydrophobic inner layer and a hydrophilic outer layer, exhibiting significant one-way moisture wicking properties and long-lasting moisture-wicking and quick-drying performance that does not diminish with increasing washing cycles.

[0044] This embodiment relates to a method for preparing a moisture-wicking and quick-drying fabric. The fabric prepared by this method exhibits excellent moisture-wicking and quick-drying performance, and its moisture-wicking and quick-drying properties are long-lasting and do not diminish with washing. Specifically, this method utilizes physical phase change swelling technology to construct interconnected micron-sized pores within and on the surface of the fiber body. The small pore size of the micropores generates significant Laplace capillary pressure, thereby achieving superior liquid absorption dynamics and water storage capacity compared to grooves on the surface of conventional irregularly shaped cross-section fibers. However, due to the large number of pores within the microporous fiber, its mechanical structure is relatively loose, resulting in weak resistance to lateral pressure. In traditional short-fiber spinning processes, high twist is typically required to ensure yarn strength. The radial compression force generated by this high twist can easily cause the microporous structure within the fiber to collapse or close, causing the fiber to lose its original microporous moisture-wicking function after being made into yarn. Furthermore, although fibers with microporous structures have a large water absorption capacity, if they are directly woven into homogeneous fabrics, the fabric will absorb a large amount of water and remain moist for a long time after absorbing moisture. This type of fabric, which absorbs water tightly against the skin, can easily cause a severe feeling of dampness, coldness, and stickiness, thus reducing wearing comfort. Therefore, this solution specifically uses compact Siro spinning or ring spinning equipment. However, unlike conventional spinning processes that use high twist to pursue high strength, this solution strictly limits the yarn twist to a low twist range of 6 twists / cm to 16 twists / cm. By limiting the low twist parameter, the radial pressure during yarn formation is significantly reduced. Simultaneously, to address the problem that low twist often leads to insufficient yarn strength and excessive hairiness, this solution utilizes the unique airflow gathering or double-bundle twisting mechanism of compact spinning or Siro spinning equipment to make the fibers more compact and straighter before twisting, using the tight cohesion between fibers to compensate for the strength loss caused by low twist. Furthermore, to address the problem of microporous fibers absorbing a lot of water and easily causing the fabric to become damp, cold, and sticky, this solution uses a knitting layering process to construct an asymmetrical structure with a looser inner layer and a denser outer layer. By weaving hydrophobic polyester filaments as the ground yarn into the inner layer and microporous moisture-wicking and quick-drying yarns as the face yarn into the outer layer, the ultra-strong capillary adsorption force generated by the extremely small pore size of the outer layer microporous fibers creates a significant capillary pressure difference with the larger fiber gaps in the inner layer. This differential capillary effect overcomes gravity and adsorption resistance, actively pumping sweat from the inner layer to the outer layer and accelerating evaporation. This allows the skin-adhesive layer to remain relatively dry even with heavy sweating, effectively preventing the fabric from sticking to the skin due to moisture backflow.

[0045] The foregoing description of the specifications and embodiments is intended to explain the scope of protection of this invention, but does not constitute a limitation on the scope of protection of this invention. Modifications, equivalent substitutions, or other improvements to the embodiments of this invention or a portion thereof that can be obtained by those skilled in the art through logical analysis, reasoning, or limited experimentation, based on the teachings of this invention or the foregoing embodiments, in conjunction with common knowledge, general technical knowledge, and / or existing technology, should all be included within the scope of protection of this invention.

Claims

1. A method for preparing a moisture wicking fabric, characterized in that, The method comprises the following steps: S10: heating and melting polyester chips, extruding the melt through a spinneret, and expanding the volume of the melt by phase change during the extrusion process to obtain micro-porous fibers after cooling and solidification; S20: spinning the micro-porous fibers by using compact siro spinning or ring spinning equipment, twisting the yarn at a twist level of 6 twists / cm-16 twists / cm to obtain moisture absorption and quick-drying yarn with a fineness of 20s-120s; S30: weaving by using a knitting plating process, feeding and knitting the hydrophobic polyester filament as ground yarn in the inner layer of the fabric, and feeding and knitting the moisture absorption and quick-drying yarn as face yarn in the outer layer of the fabric.

2. The method for preparing a moisture-wicking and quick-drying fabric according to claim 1, characterized in that, In step S10, the melt is extruded through a spinneret with a special-shaped spinneret hole.

3. The method for preparing a moisture-wicking and quick-drying fabric according to claim 1, characterized in that, In step S20, the micro-porous fibers are spun as a single raw material, or the micro-porous fibers are mixed with 10%-30% of bamboo fibers or Tencel by weight for spinning.

4. The method for preparing a moisture-wicking and quick-drying fabric according to claim 1, characterized in that, In step S30, the hydrophobic ordinary polyester filament selected has a specification of 75D-100D.

5. The method of claim 1, wherein the step of applying the absorbent material is performed by applying the absorbent material to the back surface of the base fabric. In step S30, the knitting organization of the knitting machine is set to plain stitch, tuck stitch, plating stitch or composite stitch.

6. The method of claim 1, wherein the step of applying the absorbent material is performed by applying the absorbent material to the first and second layers of the fabric in a pattern that is substantially the same as the pattern of the absorbent material applied to the third layer of the fabric. In step S30, the stitch depth and loop density of the knitting machine are adjusted to obtain a fabric with a weight of 180g / m²-220g / m² and a thickness of 0.4mm-0.7mm.

7. The method of claim 6, wherein the step of applying the absorbent material is performed by applying the absorbent material to the back surface of the nonwoven fabric. In step S30, the stitch depth and loop density of the knitting machine are adjusted to obtain a fabric with a horizontal density of 80-105 wales / 5cm and a vertical density of 75-95 courses / 5cm.

8. The method of claim 1, wherein the step of applying the absorbent material is performed by applying the absorbent material to the first and second layers of the fabric in a pattern that is substantially the same as the pattern of the absorbent material applied to the third layer of the fabric. In step S30, the knitting machine is set to composite knitting of tuck stitch and plain stitch, the face yarn nozzle is fed with the moisture absorption and quick-drying yarn to knit tuck stitch, and the ground yarn nozzle is fed with the hydrophobic ordinary polyester filament to knit plain stitch.

9. The method of claim 8, wherein the step of applying the absorbent material is performed after the step of applying the hydrophilic material. In step S30, the stitch depth and loop density of the knitting machine are adjusted to obtain a fabric with a weight of 190g / m²-210g / m², a thickness of 0.6mm-0.7mm, a horizontal density of 80-90 wales / 5cm, and a vertical density of 85-95 courses / 5cm.