A fabric with moisture-conducting, air-permeating and ultraviolet-resistant properties

Abstract

The application discloses a fabric with moisture-conducting and air-permeating and ultraviolet resistance, which is interwoven by warp yarn and weft yarn, the warp yarn adopts nylon full-drawing yarn with special-shaped section, the weft yarn adopts nylon air-texturing yarn with core-sheath structure, the fabric has longitudinal air-guide channels extending along the warp yarn direction and transverse air-permeating gaps extending along the weft yarn direction, the material design, yarn structure and weaving process are improved, and the color weaving process path of 'dyeing first and weaving later' is innovatively adopted, so that the risk of air-guide channel shrinkage caused by post-finishing dyeing is fundamentally avoided, the efficient ultraviolet resistance is realized, the directional transportation and evaporation efficiency of sweat from the skin to the outside world are obviously improved, and the stuffy and skin-adhesion feeling of the nylon fabric in a high-temperature or sports environment is fundamentally improved.

Description

Technical Field

[0001] This invention relates to the field of functional textile fabric preparation technology, and in particular to a fabric that combines moisture-wicking and breathability with UV protection. Background Technology

[0002] Against the backdrop of global warming, frequent high temperatures, and the increasing popularity of outdoor sports, consumer demand for textile functions has gradually shifted from simple UV protection to a pursuit of comprehensive comfort performance such as breathability and quick-drying. Nylon (polyamide) fiber, due to its high strength, abrasion resistance, and lightweight properties, has become an ideal base material for outdoor sportswear and protective equipment. To simultaneously achieve UV protection, moisture wicking, and breathability in nylon fabrics, the industry has made numerous attempts; however, most existing solutions are limited by design constraints. For example, patent CN120756161A proposes using polypropylene-based functional fibers in physical blends with other fibers to achieve multifunctional integration. However, this type of solution is limited by the poor interfacial compatibility between polypropylene and non-polar functional powders, easily leading to poor spinning processability, aggregation and shedding of functional components, affecting functional durability. Furthermore, its reliance on macro-fiber blending and a double-layer structure for moisture wicking results in weak synergy between functional units, making it difficult to construct a stable and efficient integrated functional system. Increasing the number of material layers and thickness to achieve multifunctionality makes it difficult to balance lightweight and breathability. Furthermore, patent CN119194646A attempts to achieve UV resistance and heat insulation by controlling the nylon fiber structure through wet spinning combined with magnetic field assistance and high-temperature, high-pressure post-treatment. Although this solution represents a breakthrough in functional implementation, its complex process, high energy consumption, and difficulty in large-scale production limit its industrial applicability. More importantly, the dense nanofiber structure constructed by this technology severely hinders the flow of air and moisture, neglecting the moisture-wicking and breathability requirements of the fabric in actual wear, and failing to meet the comfort requirements in dynamic environments. In addition, the solution proposed in CN104116211A uses a "hydrophilic core-hydrophobic skin" composite fiber combined with a UV-resistant base fabric layer, intending to balance moisture permeability and sun protection. However, the fiber structure itself has a contradictory moisture-wicking logic, resulting in low initial moisture absorption efficiency; and the additional composite functional layer not only exacerbates the loss of breathability but also brings the risk of insufficient interfacial bonding durability. Essentially, it is still a simple stacking of different functional materials, failing to achieve effective synergy between performances.

[0003] In summary, although existing technologies can achieve basic UV protection to a certain extent, they generally suffer from poor performance in key comfort indicators such as breathability and moisture wicking due to inappropriate material selection, complex processes, or unreasonable structural design. This makes it difficult to avoid the stuffiness and skin-sticking sensation commonly experienced during exercise or in high-temperature environments. Therefore, how to achieve highly effective UV protection, excellent breathability, and rapid moisture wicking in nylon woven fabrics through integrated fiber-yarn-fabric design, without relying on high-density weaving or introducing external coatings, has become a pressing technological bottleneck in this field. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to address the difficulty in achieving a balance between breathability, moisture wicking and quick-drying properties and protective performance in existing UV-resistant nylon fabrics.

[0005] The present invention provides a fabric that combines moisture-wicking and breathability with UV protection, which is woven from warp and weft yarns. The warp yarns are made of nylon fully stretched yarn with an irregular cross section; the weft yarns are made of nylon air-textured yarn with a core-sheath structure; the fabric has longitudinal reed channels extending along the warp direction and transverse breathable gaps extending along the weft direction.

[0006] Furthermore, the warp yarn is a fully drawn nylon yarn with an octagonal cross-section and an irregularity of 55% to 65%; the fineness of the warp yarn is 40D / 34F.

[0007] Furthermore, the weft yarn includes a core layer and a sheath layer, the core layer being rich in titanium dioxide with a mass fraction of 6% to 8%, and the sheath layer being rich in polyethylene glycol hydrophilic agent with a weight average molecular weight of 4000 to 6000; the fineness of the weft yarn is 90D / 58F.

[0008] Furthermore, the longitudinal reed channels are arranged at transverse intervals, and the width of the longitudinal reed channels is 0.18-0.22mm.

[0009] Furthermore, a nylon monofilament is embedded in the transverse air-permeable gap, and the nylon monofilament has a fineness of 20D.

[0010] Preferably, the warp yarn is a fully drawn nylon yarn with an octagonal cross-section and a profile of 60%, and the weft yarn includes a core layer and a sheath layer. The core layer includes 7% titanium dioxide by mass, and the sheath layer includes 10% polyethylene glycol by mass.

[0011] Furthermore, the warp and weft yarns are configured to be dyed before weaving.

[0012] Another aspect of the present invention provides a method for preparing a fabric that combines moisture-wicking and breathability with UV protection properties, comprising the following steps: Step 1: Prepare octagonal cross-section nylon fully drawn yarn as warp yarn; prepare core-sheath structure nylon air-textured yarn as weft yarn; Step 2: Perform dyeing pretreatment on the warp and weft yarns from Step 1 respectively; Step 3: Weave the warp and weft yarns from Step 2 into fabric; The warp yarns are arranged such that a longitudinal reed channel is set every 8 to 12 warp yarns; The weft yarns are arranged such that 2 fine monofilaments are embedded every 6 to 8 weft yarns, and the fine monofilaments are 20D circular cross-section nylon monofilaments.

[0013] Furthermore, in step 1, the method for preparing the octagonal cross-section nylon fully drawn yarn includes the following steps: Step 11: The nylon chips are melted and extruded through a screw extruder to form a melt stream; The spinneret used in the screw extruder has octagonal micro-holes, the ratio of the circumscribed circle diameter to the inscribed circle diameter of the octagonal micro-holes is 2.2~2.86, and the ratio of the corner radius to the circumscribed circle diameter is ≤0.08; Step 12: The melt stream from step 11 is cooled and solidified by a ring blower to form a filament bundle; Step 13: The filament bundle from Step 12 is subjected to two-stage hot stretching in an FDY hot roller drawing machine to form a stretched filament bundle; the stretching ratio of the two-stage hot stretching is 1.7. Step 14: Wind the stretched filaments from Step 13 into a cylinder at a speed of 5100 m / min.

[0014] Further, in step 2, the method for preparing the weft yarn includes the following steps: Step 21, preparing core and sheath materials: Nylon and titanium dioxide are mixed, wherein the mass fraction of titanium dioxide is 6.0%~8.0%, to obtain core material; Nylon and polyethylene glycol are mixed, wherein the total amount of polyethylene glycol is 10%, to obtain sheath material; Step 22: The core layer raw material and sheath layer raw material obtained in step 21 are subjected to core-sheath composite spinning, and the melt pump supply ratio of the core layer and sheath layer is controlled at 40:60 to obtain core-sheath composite pre-oriented yarn; the boiling water shrinkage rate of the pre-oriented yarn is controlled at 52%~58%; Step 23: The core-sheath composite pre-oriented yarn obtained in step 22 is air-deformed through two sets of overfeed rollers to obtain air-deformed yarn; the overfeed rate of the first overfeed roller is 5.3%, the overfeed rate of the second overfeed roller is 3.3%, and the compressed air pressure of the air-deformation nozzle is 0.55~0.65MPa. The difference in crimping shrinkage rate of the air-deformed yarn is between 5% and 8%.

[0015] The present invention has the following beneficial effects: The core technological innovation of this invention lies in the precise synergistic weaving of "warp-direction hollow reeds + weft-direction spaced fine monofilaments." These two elements must be strictly matched with the two types of customized functional yarns mentioned above to form a stable, three-dimensional functional integrated system. To overcome the technical challenge of "weaving before dyeing" where dyeing shrinkage causes the hollow reed channels to close, affecting breathability, this invention specifically adopts a "dyeing before weaving" process. This involves dyeing and pre-shrinking the yarns before weaving to ensure that the hollow reed channels maintain their designed width and structural stability in the final fabric, thereby reliably achieving the preset breathability and moisture dissipation functions. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the octagonal micropores in the spinneret of the screw extruder of the present invention.

[0017] Figure 2 This is an EDS energy dispersive spectroscopy (EDS) analysis diagram of the core-sheath structure nylon air deformable yarn in Example 1.

[0018] Figure 3 This is a schematic diagram of the warp and weft yarn configuration structure on the fabric surface of Example 1.

[0019] Figure 4 The images show the absorption spectra of the octagonal cross-section fully stretched wire and the circular cross-section fully stretched wire of Example 1.

[0020] Figure 5a This is a schematic diagram simulating the moisture-wicking path of the fabric of the present invention.

[0021] Figure 5b This is a comparison diagram of the wicking height of the fabric in Example 1 of the present invention. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and data. It should be understood that the embodiments are merely illustrative of the invention and are not intended to limit the scope of the invention in any way.

[0023] The following are the test methods for the relevant performance indicators in each embodiment and comparative example, as well as the specific procedures of the related experiments: The method for testing the unidirectional moisture transfer index of the present invention: Test standard: AATCC 195-2017 "Test Methods for Liquid Moisture Management Performance" Test conditions: Test temperature 20℃, standard test solution 0.2mL, test time 120s, and take the internal to external unidirectional transfer index R.

[0024] The air permeability test method in this invention: Test standard: GB / T 5453-1997 "Textiles - Test method for air permeability of fabrics" Test conditions: Sample area 20cm², pressure difference 100Pa, temperature 20℃, humidity 65%RH.

[0025] The method for testing UPF values ​​in this invention: Test standard: GB / T 18830-2009 "Evaluation of UV Protection Performance of Textiles" Test conditions: Ultraviolet band 280–400nm, UPF average value measured by integration method.

[0026] The method for testing the evaporation rate in this invention: Test standard: GB / T 21655.1-2008 "Evaluation of moisture absorption and quick-drying properties of textiles - Part 1: Single-item combination test method" Test conditions: constant temperature and humidity (20℃, 65%RH), evaporation rate per unit time was calculated by weighing method.

[0027] In this invention, "creep shrinkage rate difference" refers to the difference between the dry heat crimp shrinkage rate and the wet heat crimp shrinkage rate of air-textured yarn under specified test conditions.

[0028] in: (1) The dry heat curling shrinkage rate was tested using a hot air treatment method; (2) The wet heat curling shrinkage rate was tested using boiling water treatment; Both were tested in accordance with GB / T 6505-2017 "Test Method for Heat Shrinkage Rate of Chemical Fiber Filaments".

[0029] The specific test conditions are as follows: The sample length was 500 mm, and the pretension was 0.05 cN / dtex. The dry heat curling shrinkage test conditions were: 180℃ hot air treatment for 15 min; the wet heat curling shrinkage test conditions were: 100℃ boiling water treatment for 30 min; after treatment, the sample length was measured after equilibration under standard temperature and humidity conditions.

[0030] The heat shrinkage rate is calculated according to the following formula: S=(L0 L1) / L0×100% Where: S is the heat shrinkage rate (%); L0 is the length of the sample before treatment; L1 is the length of the sample after treatment.

[0031] The “crease shrinkage rate difference” in this application is calculated according to the following formula: ΔS=|S1 S2| Where: ΔS is the difference in curl shrinkage rate; S1 is the dry heat curl shrinkage rate; S2 is the wet heat curl shrinkage rate.

[0032] The formula for calculating the irregularity of the present invention is as follows: Irregularity (%) = (1 - inscribed circle diameter d / circumscribed circle diameter D) × 100.

[0033] Where: the circumscribed circle diameter D and the inscribed circle diameter d are the circumscribed circle diameter and inscribed circle diameter of the octagonal spinneret orifice, respectively.

[0034] This invention discloses a fabric that combines moisture-wicking and breathability with UV protection, which is woven from warp and weft yarns. The warp yarns are made of nylon fully stretched yarn with an irregular cross section; the weft yarns are made of nylon air-textured yarn with a core-sheath structure; the fabric has longitudinal reed channels extending along the warp direction and transverse breathable gaps extending along the weft direction.

[0035] In this embodiment, the warp yarn is a fully drawn nylon yarn with an octagonal cross-section and an irregularity of 55% to 65%; the fineness of the warp yarn is 40D / 34F.

[0036] In one embodiment, the weft yarn includes a core layer and a sheath layer, the core layer being rich in titanium dioxide at a mass fraction of 6% to 8%, and the sheath layer being rich in polyethylene glycol hydrophilic agent with a weight-average molecular weight of 4000 to 6000; the fineness of the weft yarn is 90D / 58F.

[0037] In one embodiment, the longitudinal reed channels are arranged at transverse intervals, and the width of the longitudinal reed channels is 0.18-0.22 mm.

[0038] In one embodiment, a nylon monofilament is embedded in the transverse air-permeable gap, the nylon monofilament having a fineness of 20D.

[0039] This invention also discloses a method for preparing a fabric that combines moisture-wicking and breathability with UV protection properties, specifically including the following steps: Step 1: Prepare octagonal cross-section nylon fully drawn yarn as warp yarn; prepare core-sheath structure nylon air-textured yarn as weft yarn; Step 2: Perform dyeing pretreatment on the warp and weft yarns from Step 1 respectively; Step 3: Weave the warp and weft yarns from Step 2 into fabric; The warp yarns are arranged such that a hollow reed channel is set every 8 to 12 warp yarns, and the width of the hollow reed channel is 0.18 to 0.22 mm. The weft yarns are arranged such that 2 fine monofilaments are embedded in every 6 to 8 weft yarns of the core sheath structure, and the fine monofilaments are 20D circular cross-section nylon monofilaments.

[0040] The fabric of this invention precisely constructs breathable channels through a warp-direction hollow reed process. During warp weaving, a "hollow reed unit" (i.e., no warp yarn is inserted at this position, forming a longitudinal "hollow reed channel") is set every 8-12 warp yarns. The width of the hollow reed channel is 0.18-0.22mm (adapting to the fineness of 20D warp yarns, ensuring the channel does not cause fabric tearing while forming an effective breathable path). A weft-direction interval fine monofilament process achieves both a small square style and lateral breathability. During weft weaving, two 20D nylon fine monofilaments are embedded every 6-8 weft yarns (customized 90D / 58F core-sheath ATY), forming a repeating unit of "ATY weft yarn-fine monofilament-ATY weft yarn," ultimately presenting a small square appearance with sides of 3mm on the fabric surface. Furthermore, the hollow reed channels, in conjunction with functional warp yarns, constitute a continuous longitudinal breathable and moisture-dissipating main path. The fine denier, high-density warp yarn configuration ensures unobstructed reed channels while maintaining the fabric's structural tightness. These channels not only significantly improve airflow efficiency but also work in conjunction with the weft system to provide a crucial pathway for the unidirectional expulsion of sweat vapor from the inside out. Furthermore, within each small square, the core-sheath ATY weft yarn, as the core functional carrier, utilizes its gradient structure of a "high-shielding core layer – highly hydrophilic sheath layer" to become a functional unit that combines highly efficient UV protection with active directional moisture wicking. The spacing design of the fine monofilaments ensures lateral breathability while precisely fixing the distribution of these functional units.

[0041] In summary, the functional warp yarns and their reed channels, along with the functional ATY units and spaced air cavities in the weft direction, interweave and connect to form a three-dimensional functional synergistic network within the fabric. The warp and weft systems complement and enhance each other in terms of UV protection, while in terms of moisture wicking, the combination of the rapid channels of the octagonal cross-section in the warp direction and the active adsorption and diffusion in the weft direction achieves an efficient path for moisture to move from adsorption and lateral transport to longitudinal dissipation. Ultimately, this results in a synergistic unity of UV protection, dynamic gradient moisture wicking, and breathability.

[0042] It should be further explained that the longitudinal reed channel of the fabric disclosed in this invention, which combines moisture-wicking, breathability, and UV protection, is not a completely open structure. Its width is strictly controlled within the range of 0.18~0.22mm, and a synergistic support structure is formed by air-textured weft yarns and fine monofilaments. Specifically, the 90D / 58F core-sheath structure nylon air-textured yarn has a fluffy, crimped structure, which can form lateral coverage and fiber entanglement in the reed area. Simultaneously, two 20D nylon fine monofilaments are embedded every 6~8 weft yarns, which further improves the structural stability of the reed area and inhibits channel deformation or closure during washing and friction. Furthermore, the octagonal cross-section nylon FDY warp yarn has high inter-fiber friction, which can reduce yarn slippage and improve the overall anti-slip performance of the fabric.

[0043] The fabric of this invention underwent a durability test, and the results are as follows: (1) Slip resistance: According to the JIS L 1096 B method test, the warp slippage is 0.2 mm and the weft slippage is 0.4 mm, which is significantly better than the conventional requirement of ≤3 mm, indicating that the fabric has good anti-slip properties.

[0044] (2) Dimensional change rate after washing: According to JIS L 1096 testing, the warp dimension change rate was -2%, the weft dimension change rate was 0%, and the reed channel did not show obvious shrinkage, closure or structural collapse after washing.

[0045] (3) Abrasion resistance and washability: According to JIS L 0849, JIS L 0844 and JIS L 0848 tests, the dry and wet rubbing fastness both reach level 4, and the wash fastness and perspiration fastness reach level 4 to 5. After rubbing and washing, no obvious pilling, exposed base or channel deformation appeared on the fabric surface.

[0046] The above results show that the fabric of this application, while maintaining high breathability, still has good structural stability and functional durability, and can meet the actual wearing and washing needs.

[0047] It should be further explained that when the width of the reed channel is controlled within the range of 0.18~0.22mm, a better balance can be achieved between air permeability and UV protection.

[0048] The test results are shown in Table 1: Table 1 The above results indicate that: When the width of the reed channel is too small, the improvement in air permeability is limited; while when the width of the reed channel exceeds 0.22mm, the UPF value drops significantly.

[0049] Therefore, this application controls the width of the reed channel to 0.18~0.22mm, which not only forms a stable and effective airflow path, but also maintains excellent UV resistance performance of UPF≥65, and has a synergistic optimization effect.

[0050] In this embodiment, the method for preparing octagonal cross-section nylon fully drawn yarn in step 1 includes the following steps: Step 11: The slices are melted and extruded through a screw extruder to form a melt stream; Nylon 6 chips with an intrinsic viscosity of 2.6 dL / g were dry-mixed with titanium dioxide (TiO2) matte masterbatch using a high-precision metering feeding system. The amount of titanium dioxide matte masterbatch added was such that the total mass fraction of titanium dioxide in the mixture remained stable at 2.8%~3.2%. The uniformly mixed material was then fed to a screw extruder for melt blending within a temperature range of 265℃, and then extruded through a specially designed spinneret. The micropores of the spinneret have a precision-machined octagonal structure, and its geometric characteristics are as follows: like Figure 1 As shown, the spinneret used in the screw extruder has octagonal micropores with an outer circle diameter of 0.25-0.35 mm. The ratio of the outer circle diameter to the inner circle diameter of the octagonal micropores is 2.2-2.86. This ratio is key to ensuring high cross-sectional irregularity (≥55%) and smooth melt flow without breakage. The ratio of the corner radius to the outer circle diameter is ≤0.08. This design effectively enhances the capillary effect of the fiber and is a core structural factor in improving the moisture-wicking performance of the fabric.

[0051] Step 12: The melt stream from step 11 is cooled and solidified by a ring blower to form a filament bundle; The extruded melt streams are subjected to steady-state cooling and solidification under annular airflow conditions (temperature 22℃, airflow velocity 0.5m / s). This mild and stable cooling condition limits the cooling rate of the melt streams to maintain the high fidelity of their octagonal cross-section, effectively avoiding cross-sectional deformation problems caused by excessively rapid or uneven cooling.

[0052] Step 13: The filament bundle from Step 12 is subjected to two-stage hot stretching in an FDY hot roller stretching machine to form a stretched filament bundle; the stretching ratio of the two-stage hot stretching is 1.7.

[0053] The first stage of stretching (GR1): temperature 80℃, roller speed 3100m / min, aims to achieve the initial orientation of nascent fiber macromolecules, laying a uniform structural foundation for subsequent high-ratio stretching. The second stage of stretching and heat setting (GR2): temperature 175℃, roller speed 5000m / min. This stage aims to induce sufficient slippage and rearrangement of macromolecular chains to complete the final orientation, and simultaneously trigger the formation and setting of the crystalline structure. The total stretching ratio of the two stages is controlled at 1.7. This specific ratio is an optimized range to ensure that the fiber achieves high strength while maintaining its cross-sectional regularity and avoiding structural damage due to excessive stretching.

[0054] Step 14: Wind the stretched filaments from Step 13 into a cylinder; the winding speed is 5100 m / min.

[0055] Finally, the filament bundle is wound into a bobbin at a speed of 5100m / min to produce octagonal cross-section nylon FDY yarn with a target specification of 40D / 34F.

[0056] The octagonal cross-section nylon fully drawn yarn prepared by the method of the present invention has a regular octagonal cross-section that acts as a "microprism". First, it can refract and internally reflect most of the incident ultraviolet rays multiple times, significantly reducing the transmittance of ultraviolet rays. Second, it can extend the propagation path (optical path) inside the fiber, providing more sufficient absorption opportunities for TiO2 particles that are uniformly dispersed inside the fiber. Figure 4 The UV absorption diagram clearly compares the advantages of octagonal and circular cross-sections in UV absorption. The synergistic effect of the yarn surface structure and the absorption by functional particles constructs a highly efficient and durable UV barrier, achieving a high and long-lasting UPF value without the need for additional coatings or finishing processes. The inherent multi-faceted structure of the octagonal cross-section forms continuous, interconnected microgrooves on the fiber surface. These grooves integrate into a highly efficient axial capillary network within the yarn. This network rapidly adsorbs and directionally transports liquid water to the fabric surface through powerful capillary action, allowing for rapid diffusion and evaporation of moisture, preventing accumulation and keeping the skin-contacting surface dry. Furthermore, nylon FDY itself possesses high strength and good elasticity. More importantly, the unique octagonal cross-section significantly increases inter-fiber friction, effectively limiting fiber slippage within the yarn system, making the fabric structure more stable. This allows it to better withstand the tensile and abrasive forces of daily use, maintaining fabric shape and enhancing fabric durability.

[0057] In this embodiment, the method for preparing the core-sheath structure nylon air-textured yarn in step 1 includes the following steps: Step 21, prepare core and sheath materials. Nylon and titanium dioxide are mixed, with the titanium dioxide having a mass fraction of 6.0% to 8.0%, to obtain the core layer material; nylon and polyethylene glycol are mixed, with the total amount of polyethylene glycol being 10%, to obtain the sheath layer material; Specifically: Core layer material preparation: Base nylon chips are dry-blended with high-concentration titanium dioxide (TiO2) matting masterbatch using a precise metering device. This high-content design aims to provide the fiber with a durable and powerful UV-absorbing core. Sheath layer material preparation: Base nylon chips, conventional concentration titanium dioxide (TiO2) matting masterbatch (controlling the TiO2 mass fraction in the mixture to 2.0%~3.0%), and polyethylene glycol (PEG) hydrophilic masterbatch with a weight-average molecular weight (Mw) of 4000~6000 are dry-blended. The amount of PEG hydrophilic masterbatch added is 10% of the total weight of the sheath layer chips. The above mixture is melt-blended, extruded, and granulated at 230°C using a twin-screw extruder to prepare sheath-specific modified nylon chips with a moisture regain of approximately 5.8%.

[0058] Step 22: The core layer raw material and sheath layer raw material obtained in step 21 are subjected to core-sheath composite spinning, and the melt pump supply ratio of the core layer and sheath layer is controlled at 40:60 to obtain a core-sheath composite pre-oriented yarn; the boiling water shrinkage rate of the pre-oriented yarn is controlled at 52%~58%; The key process conditions are as follows: (1) Intrinsic viscosity of nylon chips: 2.6 ± 0.02 dL / g; (2) Spinning temperature distribution: screw 225℃→230℃→235℃, spinning box 230℃; (3) Cooling conditions: air temperature 22±1℃, air speed 0.5±0.02m / s, cooling distance 1200mm; (4) Oiling rate: 2.0 ± 0.2 wt%; (5) Winding tension: 18±2cN; (6) Ambient temperature and humidity: 25±2℃, 60±5%RH; (7) Winding speed: 3300 m / min. Through the above-mentioned synergistic process, the boiling water shrinkage rate of the pre-oriented yarn should be controlled within the range of 52% to 58%. Maintaining the boiling water shrinkage rate of this pre-oriented yarn within this specific range is crucial for forming a stable, uniform, and moderately fluffy loop structure in subsequent air deformation processing.

[0059] Step 23: The pre-oriented core-sheath composite yarn obtained in step 22 is passed through two sets of overfeed rollers into air deformation to produce air-textured yarn. The overfeed rate of the first overfeed roller is 5.3%, and the overfeed rate of the second overfeed roller is 3.3%. The compressed air pressure of the air deformation nozzle is 0.55~0.65MPa. The difference in crimping shrinkage rate of the air-textured yarn is between 5% and 8%.

[0060] The specific steps are as follows: Preheating and softening: The pre-oriented yarn obtained in step 22 is introduced into the hot chamber of the air texturer and preheated at 180°C to soften the yarn and facilitate deformation. Air texture: The preheated pre-oriented yarn enters the air texture nozzle and, under the action of compressed air at 0.55~0.65MPa, with the parameters of a first overfeed rate of 5.3% and a second overfeed rate of 3.3% (total overfeed rate of 8.6%), the yarn undergoes sufficient and irregular curling and entanglement to form a fluffy structure. Heat setting: The deformed yarn is heat-set at 170°C to eliminate internal stress, fix the fluffy structure, and ensure its stability in use. Winding: After tension adjustment, the set yarn is wound to finally obtain an air textured yarn (ATY) with a fineness of 90D / 58F. The final air textured yarn has a crimp shrinkage difference (CCRp-CCRt) between 5% and 8%. This stable three-dimensional rolled structure is the core of achieving the integrated function of "high breathability - dynamic gradient moisture wicking - UV protection". It simultaneously constructs a physical channel for breathability and moisture wicking and an optical trap to enhance UV protection.

[0061] The core-sheath structured nylon air-textured yarn prepared by the method of this invention achieves a synergistic and multiplicative enhancement of UV resistance and axial diffusion moisture-wicking function: its core layer acts as the primary reflective shielding layer to achieve highly efficient UV resistance. Figure 2 EDS (Energy Dispersive Spectroscopy) analysis confirmed the gradient distribution of titanium elements in the core and sheath layers, verifying the successful implementation of functional gradient design. The sheath layer, through the weak hydrogen bonds formed by the hydroxyl groups of PEG and the amide bonds of nylon, increases water molecule adsorption sites, constructing a durable hydrophilic network. More importantly, the inherent difference in hygroscopicity between the core and sheath allows moisture to be rapidly locked into the hydrophilic network of the sheath layer when the skin sweats, preferentially diffusing and transporting laterally along the fiber axis and the hydrophilic interfaces between yarns, ultimately spreading and evaporating rapidly on the outer side of the fabric. This structure effectively guides the directional movement of moisture, reducing the "wet and sticky" feeling caused by vertical moisture penetration into the core layer. Thus, while ensuring high UV protection, it significantly improves the dynamic gradient moisture wicking and quick-drying efficiency of sweat from the inside out, enhancing the dryness and comfort of dynamic wear. Furthermore, in high-concentration titanium dioxide applications, TiO2 itself possesses both matting and UV protection functions. By precisely confining it to the core layer, it not only optimizes the process adaptability during spinning but also endows the fiber with stable UV protection capabilities. This design reduces melt anomalies and spinning breakage caused by insufficient interfacial compatibility between TiO2 and the nylon matrix, thus improving the stability and yield of spinning. Furthermore, the high concentration of TiO2 in the core layer effectively blocks UV damage to the fiber's internal structure by absorbing and scattering ultraviolet rays, while the moderate thickness of the outer nylon sheath does not affect the UV protection of TiO2. Simultaneously, this structure avoids the loss of mechanical properties caused by direct exposure of TiO2 particles, ensuring the stability of the final fiber's strength, elongation, abrasion resistance, and other mechanical properties.

[0062] Furthermore, the core-sheath structure of nylon air-textured yarn endows the fabric with durable and intelligent hydrophilic and moisture-wicking capabilities: by employing a strategy of melt-blending polyethylene glycol (PEG) only in the sheath layer, the hydrophilic function is permanently anchored to the fiber surface. This design not only achieves rapid absorption and directional diffusion of moisture for efficient quick-drying, but also fundamentally overcomes the inherent defects of traditional finishing techniques, such as easy shedding of surface hydrophilic agents and poor washability, ensuring the high durability of the fabric's moisture-wicking and quick-drying functions.

[0063] The core technological innovation of this invention lies in the precise synergistic weaving of "warp-direction hollow reeds + weft-direction spaced fine monofilaments." These two elements must be strictly matched with the two types of customized functional yarns mentioned above to form a stable, three-dimensional functional integrated system. To overcome the technical challenge of "weaving before dyeing" where dyeing shrinkage causes the hollow reed channels to close, affecting breathability, this invention specifically adopts a "dyeing before weaving" process. This involves dyeing and pre-shrinking the yarns before weaving to ensure that the hollow reed channels maintain their designed width and structural stability in the final fabric, thereby reliably achieving the preset breathability and moisture dissipation functions.

[0064] Example 1 This embodiment discloses a fabric that combines moisture-wicking and breathability with UV protection properties. It is made of interwoven warp and weft yarns. The warp yarns are made of nylon fully stretched yarn with an irregular cross section. The weft yarns are made of nylon air-textured yarn with a core-sheath structure. The fabric has longitudinal reed channels extending along the warp direction and transverse breathable gaps extending along the weft direction.

[0065] In this embodiment, the warp yarn is a fully drawn nylon yarn with an octagonal cross-section and a profile of 60%; the fineness of the warp yarn is 40D / 34F.

[0066] In this embodiment, the weft yarn includes a core layer and a sheath layer. The core layer is rich in titanium dioxide with a mass fraction of 7%, and the sheath layer is rich in polyethylene glycol hydrophilic agent with a weight average molecular weight of 4000-6000. In the sheath layer, the mass fraction of polyethylene glycol is 10%. The fineness of the weft yarn is 90D / 58F.

[0067] In this embodiment, the longitudinal reed channels are arranged at transverse intervals, and the width of the longitudinal reed channels is 0.18-0.22 mm.

[0068] This embodiment further provides a method for preparing the above-mentioned fabric, which specifically includes the following steps: Step 1: Prepare octagonal cross-section nylon fully drawn yarn as warp yarn; prepare core-sheath structure nylon air-textured yarn as weft yarn; Step 2: Perform dyeing pretreatment on the warp and weft yarns from Step 1 respectively; the warp yarns are dyed with acid dyes.

[0069] Step 3: Weave the warp and weft yarns from Step 2 on an air-jet loom using a plain weave structure.

[0070] like Figure 3 As shown, the warp yarns are arranged as follows: a hollow reed unit is set every 10 warp yarns to form a longitudinal hollow reed ventilation channel, and the width of the hollow reed channel is 0.2mm. Warp configuration: Warp the dyed warp yarns according to the designed width. Use a steel reed with 100 teeth / 10cm (0.1mm spacing between single reed teeth), and thread the reed in the manner of "leaving 2 reed teeth after every 10 warp yarns, and repeating this cycle" to form a longitudinal empty reed channel with a width of about 0.2mm. The warp density is set to 128 warp yarns / inch.

[0071] The weft yarns are arranged such that every 6 weft yarns of the core sheath structure are interspersed with 2 fine monofilaments, and the fine monofilaments are 20D circular cross-section nylon monofilaments.

[0072] Weft configuration: Weft is inserted in a manner that “after every 6 weft yarns of the core sheath structure are inserted, 2 20D circular cross-section nylon monofilaments are inserted, and this cycle is repeated” to form a transverse air-permeable gap.

[0073] Step 4: The yarn-dyed fabric obtained from weaving is desized, washed, and then heat-set at 170°C to stabilize the fabric size and style, thus obtaining the final fabric.

[0074] In this embodiment, the method for preparing octagonal cross-section nylon fully drawn yarn in step 1 includes the following steps: Step 11: The nylon chips are melted and extruded through a screw extruder to form a melt stream; Nylon 6 chips with an intrinsic viscosity of 2.6 dL / g were dry-mixed with titanium dioxide (TiO2) matting masterbatch using a high-precision metering feeding system. The amount of titanium dioxide matting masterbatch added was such that the total mass fraction of titanium dioxide in the mixture was kept stable at 3%.

[0075] The spinneret used in the screw extruder has octagonal micro-holes, the ratio of the circumcircle diameter to the incircle diameter of the octagonal micro-holes is 2.5, and the ratio of the corner radius to the circumcircle diameter is ≤0.08; Step 12: The melt stream from step 11 is cooled and solidified by a ring blower to form a filament bundle; Step 13: The filament bundle from Step 12 is subjected to two-stage hot stretching in an FDY hot roller drawing machine to form a stretched filament bundle; The stretching ratio of the two-stage hot stretching is 1.7.

[0076] Step 14: Wind the stretched filaments from Step 13 into a cylinder; The winding speed is 5100m / min.

[0077] like Figure 4 The UV-Vis absorption spectra of octagonal and circular cross-section nylon fully drawn yarns shown indicate that the absorbance of the octagonal cross-section sample is significantly higher than that of the circular cross-section sample in the UV region (200-400 nm).

[0078] In this embodiment, the method for preparing the core-sheath structure nylon air-textured yarn in step 1 includes the following steps: Step 21, prepare core and sheath materials. Nylon and titanium dioxide are mixed, wherein the titanium dioxide has a mass fraction of 7%, to obtain the core layer raw material; Nylon and polyethylene glycol are mixed, with the total amount of polyethylene glycol being 10%, to obtain a sheath material; Step 22: The core layer raw material and sheath layer raw material obtained in step 21 are subjected to core-sheath composite spinning, and the melt pump supply ratio of the core layer and sheath layer is controlled to be 40:60 to obtain core-sheath composite pre-oriented yarn. The boiling water shrinkage rate of the pre-oriented yarn is controlled at 55%.

[0079] Step 23: The pre-oriented yarn of the core-sheath composite obtained in step 22 is air-deformed through two sets of overfeed rollers to obtain air-deformed yarn.

[0080] The overfeed rate of the first overfeed roller is 5.3%, the overfeed rate of the second overfeed roller is 3.3%, and the compressed air pressure of the air deformation nozzle is 0.55~0.65MPa.

[0081] The difference in curling shrinkage rate of the air-textured yarn is 6.5%.

[0082] Example 2 Example 2 provides a fabric with moisture-wicking, breathable, and UV-resistant properties, and its preparation method. The difference from Example 1 is that in the fabric of this example, the warp yarn is a fully drawn nylon yarn with an octagonal cross-section and a profile of 65%. Correspondingly, unlike Example 1, in the preparation method of this example, in step 11, the ratio of the outer circle diameter to the inner circle diameter of the octagonal micropore is 2.86.

[0083] Example 3 Example 3 provides a fabric with moisture-wicking, breathable, and UV-resistant properties and its preparation method. The difference from Example 1 is that in the fabric of this example, the core layer of the weft yarn is rich in titanium dioxide with a mass fraction of 6%.

[0084] Example 4 Example 4 provides a fabric with moisture-wicking, breathable and UV-resistant properties and its preparation method. The difference from Example 1 is that in step 21 of the preparation method of this example, the total amount of polyethylene glycol is 8%.

[0085] Comparative Example 1: This comparative example provides a fabric and its preparation method, which differs from Example 1 in that: in step 1 of the preparation method of this embodiment, the warp yarn of the octagonal cross-section nylon fully drawn yarn is replaced with 40D / 34F matte circular cross-section nylon fully drawn yarn.

[0086] Comparative Example 2: This comparative example provides a fabric and its preparation method. The difference between this comparative example and Example 1 is that in step 1 of the preparation method of this example, the weft yarn of the core-sheath structure nylon air textured yarn is replaced with ordinary matte circular cross-section nylon air textured yarn of 90D / 68F.

[0087] Comparative Example 3: This comparative example provides a fabric and its preparation method. The difference between the preparation method of the fabric in this comparative example and that of Example 1 is that there is no three-dimensional weaving structure: the warp reed channel and the weft spacing fine monofilament process are cancelled, the full reed threading method is adopted and the weft yarn of the core sheath structure is woven in full weft, and the fabric weight is kept consistent with that of Example 1 by adjusting the warp and weft density.

[0088] Comparative Example 4: This comparative example provides a fabric and its preparation method. The difference between this comparative example and Example 1 is that it adopts a weaving-then-dyeing process, that is, first weaving the greige fabric with undyed warp and weft yarns, and then dyeing and setting the fabric.

[0089] Dyeing process: Dye: 2.0% owf acid dye; Temperature: 98℃; Time: 30 min; pH: 4.5~5.0 (adjusted with acetic acid); Bath ratio: 1:20; Reduction cleaning: 1 g / L sodium hydrosulfite, 80℃×10 min.

[0090] Heat setting process: Temperature: 170℃; Time: 60s; Overfeed: 2%; Tension: 600N.

[0091] Performance Study The fabrics prepared in Examples 1, 2, 3, and 4 and Comparative Examples 1, 2, 3, and 4 were compared and tested, and their performance spectrum is shown in Table 2.

[0092] Table 2 Test results show that: Air permeability: The air permeability of Comparative Example 3 (without three-dimensional weaving structure) was only 185 mm / s, which was significantly lower than that of Examples 1-4 (377-387 mm / s). This indicates that the air permeability depends on the three-dimensional weaving structure of "warp-direction hollow reed + weft-direction interlaced fine monofilament". The air permeability of Comparative Example 4 (weaving-then-dyeing process) dropped to 230 mm / s, proving that the "dyeing-then-weaving" process is the key to ensuring the stability of the air permeability channel structure.

[0093] The UV resistance is achieved by the synergy of warp and weft yarns: Comparative Example 1 (circular warp yarn) UPF value 45 and Comparative Example 2 (ordinary weft yarn) UPF value 35, both lower than Examples 1-4 (58-65), confirming that the diffuse reflection effect of the octagonal warp yarn and the absorption effect of the high concentration of TiO2 in the core layer are the core of UV resistance.

[0094] The moisture-wicking performance depends on the synergy of physical and chemical processes: the unidirectional transfer index (0.65, 0.80) and evaporation rate (0.25, 0.32 g / h) of Comparative Example 1 (circular warp) and Comparative Example 2 (ordinary weft) are both lower than those of Example 2 (0.85, 0.38 g / h), reflecting the importance of the capillary effect of the warp microgrooves and the hydrophilic function of the PEG sheath in the weft. In Example 2 (increased warp irregularity), the indicators slightly decreased to 0.72 and 0.32 g / h, which is due to the further increase in irregularity leading to changes in the adhesion of the capillary grooves and weakening the capillary effect. The moisture-wicking performance of Example 4 (8% PEG) decreased slightly, indicating that the addition of 10% PEG to the sheath is more conducive to moisture-wicking efficiency.

[0095] Comparative Example 3 eliminated the hollow reed channel structure, transforming the original "three-dimensional moisture-wicking channel structure" into a dense planar structure. This resulted in a reduction in the number of capillary channels and decreased connectivity, while airflow was restricted, and the evaporation area decreased. Consequently, its unidirectional moisture transfer index and evaporation rate were significantly reduced. Comparative Example 4 employed a weaving-then-dyeing process. During the high-temperature finishing process, the fabric underwent thermal shrinkage, causing the hollow reed channels to shrink or even partially close, making the structure more compact. This weakened the moisture-wicking channels and airflow capacity, resulting in performance lower than the example. However, since some structural elements were retained, its performance was slightly better than Comparative Example 3, which had no hollow reed structure at all.

[0096] like Figure 5a and Figure 5bAs shown, the dynamic gradient moisture-wicking mechanism of the fabric of this invention and the comparison of wicking height of yarns with different structures are as follows: On the one hand, the axial capillary channel is constructed by the micro-grooves on the surface of the warp octagonal cross-section nylon FDY, which works in conjunction with the hydrophilic PEG sheath network of the weft core-sheath structure ATY to form an efficient moisture-wicking path of "adsorption-lateral diffusion-longitudinal transport-environmental evaporation", realizing the directional transfer and rapid dissipation of sweat from the skin side (inner side) to the outer side of the fabric; on the other hand, the wicking height test directly verifies that the fabric composed of octagonal cross-section warp yarn and core-sheath structure weft yarn of this invention has a significantly higher wicking height than the control group composed of circular cross-section warp yarn, which confirms the capillary effect of the irregular cross-section and the hydrophilic synergy of the core-sheath structure, effectively improving the moisture-wicking and quick-drying performance of the fabric.

[0097] Example 1 achieves optimal comprehensive performance with an air permeability of 385mm / s, UPF65, unidirectional transfer index of 0.85, and evaporation rate of 0.38g / h through the synergistic effect of "different shaped warp yarn + core sheath weft yarn + three-dimensional weaving + dyeing before weaving".

[0098] The performance imbalance caused by the lack of a single technical feature in each comparison case confirms that the technical system of this invention can effectively solve the pain point of the difficulty in balancing the multi-functionality and high comfort of nylon fabrics.

[0099] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A fabric that combines moisture-wicking and breathability with UV protection, woven from warp and weft yarns, characterized in that, The warp yarns are made of nylon fully drawn yarn with an irregular cross section; The weft yarn is made of nylon air-textured yarn with a core-sheath structure; the fabric has longitudinal reed channels extending along the warp direction; and transverse air-permeable gaps extending along the weft direction; the method for preparing the fabric includes the following steps: Step 1: Prepare octagonal cross-section nylon fully drawn yarn as warp yarn; prepare core-sheath structure nylon air-textured yarn as weft yarn; Step 2: Perform dyeing pretreatment on the warp and weft yarns from Step 1 respectively; Step 3: Weave the warp and weft yarns from Step 2 into fabric; The warp yarns are arranged such that a longitudinal reed channel is set every 8 to 12 warp yarns; The weft yarns are arranged such that 2 fine monofilaments are embedded every 6 to 8 weft yarns, and the fine monofilaments are 20D circular cross-section nylon monofilaments. In step 1, the method for preparing octagonal cross-section nylon fully drawn yarn includes the following steps: Step 11: The nylon chips are melted and extruded through a screw extruder to form a melt stream; The spinneret used in the screw extruder has octagonal micro-holes, the ratio of the circumscribed circle diameter to the inscribed circle diameter of the octagonal micro-holes is 2.2~2.86, and the ratio of the corner radius to the circumscribed circle diameter is ≤0.08; Step 12: The melt stream from step 11 is cooled and solidified by a ring blower to form a filament bundle; Step 13: The filament bundle from Step 12 is subjected to two-stage hot stretching in an FDY hot roller drawing machine to form a stretched filament bundle; the stretching ratio of the two-stage hot stretching is 1.

7. Step 14: Wind the stretched filaments from Step 13 into a cylinder at a speed of 5100 m / min. In step 2, the method for preparing the weft yarn includes the following steps: Step 21, preparing core and sheath materials: Nylon and titanium dioxide are mixed, wherein the mass fraction of titanium dioxide is 6.0%~8.0%, to obtain core material; Nylon and polyethylene glycol are mixed, wherein the total amount of polyethylene glycol is 10%, to obtain sheath material; Step 22: The core layer raw material and sheath layer raw material obtained in step 21 are subjected to core-sheath composite spinning, and the melt pump supply ratio of the core layer and sheath layer is controlled to be 40:60 to obtain core-sheath composite pre-oriented yarn. The boiling water shrinkage rate of the pre-oriented yarn is controlled at 52%~58%; Step 23: The pre-oriented yarn of the core-sheath composite obtained in step 22 is air-deformed through two sets of overfeed rollers to obtain air-deformed yarn; the overfeed rate of the first overfeed roller is 5.3%, the overfeed rate of the second overfeed roller is 3.3%, the compressed air pressure of the air-deformation nozzle is 0.55~0.65MPa, and the difference in the crimping shrinkage rate of the air-deformed yarn is between 5% and 8%.

2. The fabric as described in claim 1, characterized in that, The warp yarn is a fully drawn nylon yarn with an octagonal cross-section and an irregularity of 55% to 65%; the fineness of the warp yarn is 40D / 34F.

3. The fabric as described in claim 1, characterized in that, The weft yarn comprises a core layer and a sheath layer. The core layer is rich in titanium dioxide with a mass fraction of 6% to 8%, and the sheath layer is rich in polyethylene glycol hydrophilic agent with a weight average molecular weight of 4000 to 6000. The fineness of the weft yarn is 90D / 58F.

4. The fabric as described in claim 1, characterized in that, The longitudinal reed channels are arranged at transverse intervals, and the width of the longitudinal reed channels is 0.18-0.22mm.

5. The fabric as described in claim 1, characterized in that, The transverse air-permeable gap contains embedded nylon monofilaments, the nylon monofilaments being 20D in fineness.

6. The fabric as described in claim 1, characterized in that, The warp yarn is a fully drawn nylon yarn with an octagonal cross-section and a profile of 60%. The weft yarn includes a core layer and a sheath layer. The core layer includes 7% titanium dioxide by mass, and the sheath layer includes 10% polyethylene glycol by mass.

7. The fabric as described in claim 1, characterized in that, The warp and weft yarns are configured to be dyed before weaving.

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