A directional moisture-conducting dry and breathable quick-drying fabric and a preparation method thereof

Abstract

The present application belongs to the field of functional textile materials, and provides a directional moisture-conducting dry and breathable quick-drying fabric and a preparation method thereof. The present application adopts a three-layer composite structure design, the outer layer is formed by a gradient wetting structure of a thermoplastic polyurethane film subjected to single-sided heat setting and a knitted fabric, the middle layer is a hydrophilic non-woven fabric, and the inner layer is a knitted fabric subjected to hydrophilic finishing and is compounded by a point-shaped net of hot melt adhesive. The thermoplastic polyurethane film is subjected to single-sided contact heating to make the hydrophilic block directional enrichment, form a gradient distribution of one side being hydrophilic and the other side being hydrophobic, and coat a low surface energy coating on the hydrophobic surface. The fabric of the present application has excellent one-way moisture-conducting performance, moisture can be quickly transferred from the inner layer to the outer layer and quickly volatilized, the dry and comfortable feeling of the close-fitting fabric is maintained, and the fabric has good air permeability and quick-drying performance, the moisture-conducting rate is increased by more than 30% compared with traditional fabrics, and has wide application value in the fields of sportswear, outdoor equipment, leak-proof underpants and the like.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of functional textile materials, and provides a directional moisture-wicking dry and breathable quick-drying fabric and a preparation method thereof. BACKGROUND

[0002] With the transformation of modern lifestyle and the upgrading of consumer demand, the market of sportswear, outdoor equipment and intimate functional textiles is showing a rapid growth trend. These application fields put forward higher and higher requirements for the functionality of fabrics. During intense exercise, the human body will produce a large amount of sweat, and how to effectively manage these moisture is directly related to the comfort and performance of the wearer. Therefore, excellent moisture-wicking performance has become one of the core requirements of functional fabrics. At the same time, as a key factor to maintain the comfort of the micro-environment, the air permeability can ensure air circulation and prevent the generation of stuffy feeling, which is crucial for the comfort of long-wearing. The synergistic effect of these two performances not only can significantly improve the wearing experience of users, but also can effectively prevent skin discomfort and bacterial growth caused by humid environment. With the continuous expansion of the market of smart textiles and high-performance sports equipment, fabric materials with excellent moisture-wicking and air permeability have become an important driving force for the technological progress and product innovation of the entire functional textile industry, and play an increasingly important role in improving product added value, meeting consumer individual needs and expanding application fields.

[0003] Although the technology of functional fabrics is developing rapidly, there are still many technical bottlenecks and performance limitations in the moisture-wicking and air-permeable fabrics on the market. Traditional moisture-wicking and sweat-repellent fabrics mainly rely on the moisture absorption of fibers or simple structural design to realize water transmission, which often leads to low moisture-wicking efficiency, cannot realize fast one-way moisture-wicking, and easily causes water retention in the fabric, affecting the dry and cool effect. At the same time, existing fabrics also face challenges in air permeability. Many products sacrifice air permeability in pursuit of waterproof and windproof performance, or the air permeability and moisture-wicking performance cannot be effectively coordinated, resulting in a decline in overall comfort. For example, Chinese Patent No. CN208343598U discloses a composite moisture-wicking fabric, but has the disadvantages of unclear moisture-wicking direction and discontinuous water transmission path. In addition, Chinese Patent No. CN218660847U discloses a breathable and quick-drying fabric, but has the disadvantages of difficult balance between air permeability and moisture-wicking performance and poor functional durability. These technical limitations mainly result from the singleness of material design concept, the complexity of processing technology and the lack of understanding of water transmission mechanism, making it difficult for existing products to simultaneously meet the dual performance requirements of high-efficiency moisture-wicking and excellent air permeability, which seriously restricts the promotion and application of functional fabrics in high-end application fields. SUMMARY

[0004] (1) Technical problems solved

[0005] The application aims to provide a directional moisture-conducting dry and breathable quick-drying fabric and a preparation method thereof, and solve the problem of insufficient moisture-conducting and breathable performance of the fabric.

[0006] (2) Technical scheme

[0007] In order to achieve the above-mentioned purpose, the application provides the following technical scheme: a directional moisture-conducting dry and breathable quick-drying fabric is composed of a three-layer composite structure of an outer composite body, an intermediate layer and an inner layer arranged in turn from outside to inside; the outer composite body is formed by adhering and compounding a thermoplastic polyurethane film and a knitted fabric, and the thermoplastic polyurethane film is located on the outside of the knitted fabric; the thermoplastic polyurethane film is subjected to heat orientation treatment by a single-sided contact heating method, so that the hydrophilic block is oriented and enriched, a gradient wetting structure with a hydrophilic surface on the side adhering to the knitted fabric and a hydrophobic surface on the side away from the knitted fabric is formed, and the thermoplastic polyurethane film has a micropore / microslit array penetrating the film thickness, so that the fabric has water vapor permeability and air permeability at the same time, and the micropore / microslit remains penetrating after coating and compounding; the intermediate layer is a hydrophilic non-woven fabric; the inner layer is a hydrophilically finished knitted fabric; and the three layers are compounded by a point-shaped network of hot melt adhesive.

[0008] The three-layer composite structure design of the application is mainly used to enhance the moisture-conducting and breathable performance of the fabric. The core purpose of the design is to build an efficient water transmission channel, and to realize excellent one-way moisture-conducting effect through the synergistic effect of different functional layers. The thermoplastic polyurethane film in the outer composite body is subjected to heat orientation treatment by a single-sided contact heating method, so that the hydrophilic block is oriented and enriched, and a unique gradient wetting structure is formed, in which the side adhering to the knitted fabric is a hydrophilic surface, and the side away from the knitted fabric is a hydrophobic surface. This asymmetric wetting design provides driving force for the directional transmission of water. The intermediate layer of hydrophilic non-woven fabric acts as a relay station for water transmission, and can quickly absorb and conduct water from the inner layer, ensuring the continuity of the water transmission path. The inner layer of hydrophilically finished knitted fabric directly contacts the human skin, has excellent moisture absorption capacity, and can quickly absorb the water on the surface of the body and transmit it to the intermediate layer. The three-layer structure is compounded by a point-shaped network of hot melt adhesive, which not only ensures the effective connection between the layers, but also maintains the necessary air permeation channel. This multi-level functional design makes each layer play its specific role, and at the same time, the layers form an organic cooperation, so that water can be quickly and continuously transmitted from the inner layer to the outer layer along the designed path and quickly evaporated, thereby realizing the comprehensive performance better than that of a single material.

[0009] Further, the preparation method of the thermoplastic polyurethane film comprises the following steps:

[0010] A1. The thermoplastic polyurethane resin is mixed with the polyethylene glycol-polytetrahydrofuran diol block copolymer, and then melt blended in a twin-screw extruder at a temperature of 180-190°C, with the extruder screw rotating at a speed of 80-120 rpm;

[0011] A2. The film is formed by T-die casting at a die discharge temperature of 185-195°C, and the film thickness is controlled at 10-15 μm. The film is then cooled and shaped by a three-roll cooling process, with the cooling roll temperature being 45-60°C;

[0012] A3. The thermoplastic polyurethane film is subjected to heat setting treatment by single-sided contact heating, at a temperature of 120-145°C for 8-15 min. The heat setting treatment is performed by using a single-sided contact heating plate, and the contact pressure is 0.1-0.3 MPa. The heat setting treatment results in the formation of a gradient wettability distribution, with the side of the film that is in contact with the knitted fabric being hydrophilic, and the side of the film that is away from the knitted fabric being hydrophobic;

[0013] A4. After step A3, the thermoplastic polyurethane film is subjected to micropore treatment, so that the film forms a through-film micropore / microslit array;

[0014] A5. A low-surface-energy coating containing hydrophobic groups is applied to the hydrophobic surface, with the coating amount being 0.6-1.2 g / m², as determined by the dry weight method. The micropores / microslits remain through after the coating.

[0015] Further, the micropore treatment is needle roller micropore treatment, and the needle roller has a regular microneedle array. The thermoplastic polyurethane film is subjected to heat pressing in a hot pressing zone between the needle roller and a support roller, at a film surface temperature of 80-100°C and a linear pressure of 60-100 N / mm. The heat pressing results in the formation of a through-film micropore / microslit array on the film, with the micropores having a diameter of 240-500 μm, a pitch of 0.8-1.2 mm, and a low opening rate. The micropores / microslits remain through after the subsequent coating.

[0016] Further, the mass ratio of the thermoplastic polyurethane resin to the polyethylene glycol-polytetrahydrofuran diol block copolymer is 92-95:5-8.

[0017] Further, the preparation method of the polyethylene glycol-polytetrahydrofuran diol block copolymer comprises the following steps:

[0018] B1. Raw material pretreatment: polyethylene glycol with a molecular weight of 400-600 and polytetrahydrofuran diol with a molecular weight of 650-1000 are mixed at a molar ratio of 1:1.0-2.0, and then dried at a temperature of 80-110°C under reduced pressure for 1-2 h, to obtain dehydrated polyethylene glycol and polytetrahydrofuran diol;

[0019] B2. Pre-polymerization: under inert atmosphere, the polytetrahydrofuran diol obtained from step B1 is reacted with hexamethylene diisocyanate at a molar ratio of NCO groups to OH groups of 2.05-2.20, a catalyst dibutyl tin dilaurate is added at an amount of 50-200 ppm, and the reaction is carried out at a temperature of 70-85°C for 0.5-2h to obtain a NCO-terminated pre-polymer;

[0020] B3. Hydroxyl-terminated end-capping and block formation: the polyethylene glycol obtained from step B1 is reacted at a molar ratio of OH groups to NCO groups of 1.02-1.10 at a temperature of 70-90°C, and the reaction is continued for 1-3h by adding the pre-polymer obtained from step B2 to obtain a polyethylene glycol-polytetrahydrofuran hydroxyl-terminated block diol connected by urethane linkages;

[0021] B4. Devolatilization and purification: the reaction product obtained from step B3 is devolatilized and hot filtered at a temperature of 80-100°C and an absolute pressure of ≤1 kPa to obtain a polyethylene glycol-polytetrahydrofuran diol block copolymer having a hydroxyl value of 56-112 mgKOH / g and a corresponding number average molecular weight of 1000-2000.

[0022] Further, the coating step of the low surface energy coating comprises:

[0023] C1. A methyl methacrylate-butyl acrylate copolymer is dissolved in toluene or methyl ethyl ketone solvent to prepare a coating liquid with a solid content of 8-15%;

[0024] C2. The hydrophobic surface of the thermoplastic polyurethane film is coated using a doctor blade coating method, with a doctor blade inclination angle of 30-45° and a coating speed of 5-15 m / min;

[0025] C3. The coating amount is controlled to be 0.6-1.2 g / m2, and the coating amount is determined by the dry weight method, and precise control is achieved by adjusting the doctor blade gap and the concentration of the coating liquid;

[0026] C4. The uniform low surface energy coating is formed by curing at a temperature of 150-165°C for 2-5 min.

[0027] The preparation of the composite modified thermoplastic polyurethane film is mainly used for enhancing the gradient wetting performance and directional wetting performance of the fabric. The core purpose of the preparation design is to construct an asymmetric wetting interface through molecular structure regulation and surface functionalization treatment. First, the thermoplastic polyurethane resin is melt-blended with polyethylene glycol-polytetrahydrofuran diol block copolymer according to a specific mass ratio. The key one-sided contact heating method of heat orientation treatment process controls the temperature and contact pressure to make the hydrophilic block directional enrichment on one side of the film, so as to form a gradient wetting distribution with a hydrophilic surface on one side of the knitted fabric and a hydrophobic surface on the other side. The asymmetric structure creates a thermodynamic driving force for the one-way transmission of water. Further, a low surface energy coating formed by methyl methacrylate-butyl acrylate copolymer is coated on the hydrophobic surface to significantly enhance the hydrophobic performance of the hydrophobic surface through the doctor blade coating and heat curing process to ensure the uniformity and adhesion of the coating. This multi-level molecular design and surface modification strategy enables the thermoplastic polyurethane film to have comprehensive functional characteristics far beyond a single component, and realizes the precise spatial distribution of hydrophilicity and hydrophobicity.

[0028] Further, the knitted fabric of the outer layer composite is a warp-knitted fabric or a weft-knitted fabric knitted by polyester fibers or polyamide fibers; the hydrophilic non-woven fabric of the intermediate layer is a spunlace non-woven fabric or a needle-punched non-woven fabric mixed by polyvinyl alcohol fibers and polyester fibers at a mass ratio of 2:8 to 5:5; and the knitted fabric of the inner layer is a plain-knitted fabric or a rib-knitted fabric knitted by polyester fibers or polyamide fibers, which is treated by a polyethylene glycol monomethyl ether or a hydroxyethyl cellulose hydrophilic finishing agent, and has a surface density of 100-200 g / m².

[0029] The application further discloses a preparation method of the directional wetting dry and breathable quick-drying fabric.

[0030] S1. Outer layer composite preparation: the hydrophilic surface of the thermoplastic polyurethane film is bonded with the knitted fabric to form an outer layer composite, wherein the thermoplastic polyurethane film is located on the outer side of the knitted fabric, the bonding is achieved by point or strip hot pressing, the bonding area accounts for 20-40% of the total area, the distance between the bonding points is 5-10 mm, and the bonding is achieved under the conditions of a temperature of 120-140 ℃, a pressure of 0.2-0.5 MPa and for 1-3 min;

[0031] S2. Intermediate layer preparation: a hydrophilic non-woven fabric with a surface density of 40-80 g / m² is selected as the intermediate layer;

[0032] S3. Inner layer preparation: a knitted fabric treated by a hydrophilic finishing agent is selected as the inner layer;

[0033] S4. Three-layer integrated composite: the knitted surface of the outer layer composite, the middle layer of hydrophilic non-woven fabric and the inner layer of knitted fabric are stacked in turn, the outer layer composite is on the outermost side and the thermoplastic polyurethane film faces outward, and the three-layer integrated composite fabric is formed by hot pressing the point-shaped net of copolyester hot melt adhesive under the conditions of temperature 140-150 DEG C and pressure 0.1-0.3 MPa for 2-5 min.

[0034] Further, the glue point diameter of the point-shaped net of copolyester hot melt adhesive in the step S4 is 0.3-0.8 mm, the area coverage is 15-25%, and the melting temperature of the hot melt adhesive is 130-150 DEG C.

[0035] Application of a directional moisture guiding dry and breathable quick-drying fabric in a close-fitting layer fabric of sports clothing.

[0036] The outer layer composite as the outermost structure of the fabric mainly undertakes the final evaporation and protection function of water, and its core function is to realize the directional transmission and rapid dissipation of water through the gradient wetting structure of the thermoplastic polyurethane film. The middle layer of hydrophilic non-woven fabric focuses on the rapid absorption and relay conduction of water, providing a key transmission channel for the entire moisture guiding system. The inner layer of knitted fabric with hydrophilic finishing is mainly responsible for direct contact with the human body and initial moisture absorption, ensuring the timely collection of body surface water. In terms of improving moisture guiding performance, the asymmetric wetting interface formed by the single-sided heat setting of the outer layer composite provides a thermodynamic driving force for water transmission through the difference in surface energy between the hydrophilic surface and the hydrophobic surface. The composite structure of the middle layer of polyvinyl alcohol fibers and polyester fibers forms a continuous hydrophilic network, and the molecular chain segments of the inner layer of hydrophilic finishing agent enhance the wetting performance of the fiber surface. In terms of improving the air permeability, the point-shaped hot pressing method of the outer layer composite retains the gas flow channel, the porous non-woven structure of the middle layer provides a good air permeation path, and the elastic deformation of the inner layer of knitted structure further optimizes the air permeation effect. The synergistic effect of the three-layer structure is the continuity of the water transmission path and the multiplication effect of the transmission efficiency. The directional transmission of the outer layer, the rapid relay of the middle layer and the efficient absorption of the inner layer form a complete water management cycle, and the air permeation channels of each layer are connected to each other, realizing the synchronous optimization of moisture guiding and air permeability, and showing a comprehensive functional performance far superior to single-layer materials.

[0037] (3) Beneficial technical effects

[0038] 1. Significantly improve the one-way moisture guiding performance: through the heat setting of the thermoplastic polyurethane film by single-sided contact heating, the hydrophilic block is directionally enriched to form a gradient wetting structure with a hydrophilic surface on one side of the knitted fabric and a hydrophobic surface on the other side, combined with the hydrophobic enhancement treatment of the low surface energy coating, a clear water transmission directionality is constructed from the micro-molecular level, realizing the efficient one-way transmission of water from the inner layer to the outer layer, effectively avoiding the back penetration problem caused by the two-way diffusion of water in traditional fabrics;

[0039] 2. Greatly improve the air permeability: through the precise design of three-layer composite structure, the outer composite adopts point or strip hot pressing composite method, the composite area accounts for only 20-40% of the total area, the air permeation channel is maximally reserved, the porous non-woven structure of the intermediate layer of polyvinyl alcohol fiber and polyester fiber provides a continuous air permeation path, and the elastic structure of the inner knitted fabric further optimizes the gas flow effect, the three-layer air permeation channels are mutually penetrated to form a three-dimensional air permeation network, which significantly improves the overall air permeability;

[0040] 3. Achieve fast drying effect: through the directional wetting mechanism of gradient wetting structure and the synergistic effect of multi-level air permeation channel, water can be quickly transmitted from the human body surface to the outer surface of the fabric and evaporated quickly, and the optimized air permeability accelerates the evaporation and dissipation process of water, effectively shortens the drying time of the fabric, maintains the persistent dry state of the close-fitting layer fabric, and significantly improves the wearing comfort;

[0041] 4. Maintain long-term functional stability: through the molecular chain segment design of polyethylene glycol-polytetrahydrofuran diol block copolymer and the precise control of heat directional treatment process, the gradient wetting structure forms a stable asymmetric distribution at the molecular level, combined with the point net composite process of copolyester hot melt adhesive, to ensure the firm combination between the functional layers, so that the moisture permeability and air permeability of the fabric have excellent washing resistance and use durability, avoiding the common performance degradation problem of functional fabric;

[0042] 5. Optimize the wearing comfort: through the inner layer treated with polyethylene glycol monomethyl ether or hydroxyethyl cellulose hydrophilic finishing agent to improve the affinity with human skin, the soft feel and good moisture buffering capacity of the intermediate layer of hydrophilic non-woven fabric, and the excellent mechanical properties and dimensional stability of the outer layer of knitted fabric, the three-layer structure synergistically ensures excellent functionality and maintains good hand feeling and wearing comfort, achieving perfect balance between functionality and comfort. BRIEF DESCRIPTION OF DRAWINGS

[0043] Figure 1 The mechanism diagram of the directional wetting dry and breathable quick-drying fabric of the application;

[0044] Figure 2 The FTIR spectrum of the hydrophobic surface, hydrophilic surface and low surface energy coating of the thermoplastic polyurethane film of Example 1 of the application;

[0045] Figure 3 The one-way transmission and moisture absorption performance of the examples and comparative examples of the application;

[0046] Figure 4 The wetting characteristics and contact angle difference of the examples and comparative examples of the application;

[0047] Figure 5Air permeability and drying performance of the inventive examples and comparative examples;

[0048] Figure 6 Mechanical strength properties of the inventive examples and comparative examples;

[0049] Figure 7 Washing resistance performance of the inventive examples and comparative examples;

[0050] Figure 8 Washing resistance performance comparison of the inventive examples and comparative examples;

[0051] Figure 9 UPF value and contact coolness factor performance comparison of the inventive examples and comparative examples;

[0052] Figure 10 UVA and UVB transmittance performance comparison of the inventive examples and comparative examples;

[0053] Figure 11 UPF retention rate @ 50 wash performance comparison of the inventive examples and comparative examples. DETAILED DESCRIPTION

[0054] In order to make the purpose, technical scheme and advantages of the inventive examples clearer, the technical scheme in the inventive examples will be described clearly and completely below with reference to the drawings in the inventive examples.

[0055] Example 1

[0056] The directional moisture-conducting dry and breathable quick-drying fabric is composed of three-layer composite structure arranged from outside to inside in turn, the outer layer composite, the middle layer and the inner layer; the outer layer composite of the embodiment is formed by adhering and compounding a thermoplastic polyurethane film and a knitted fabric, and the thermoplastic polyurethane film is located on the outside of the knitted fabric; the thermoplastic polyurethane film of the embodiment is subjected to heat orientation treatment by single-sided contact heating, so that the hydrophilic block is oriented and enriched, forming a gradient wetting structure with a hydrophilic surface on the side adhering to the knitted fabric and a hydrophobic surface on the side away from the knitted fabric, and the thermoplastic polyurethane film has a micropore / microslit array penetrating the film thickness, so that the fabric has water vapor permeability and air permeability at the same time, and the micropore / microslit remains penetrating after coating and compounding; the middle layer of the embodiment is a hydrophilic non-woven fabric; the inner layer of the embodiment is a hydrophilically finished knitted fabric; the three layers of the embodiment are compounded by a hot melt adhesive point network. The preparation method of the thermoplastic polyurethane film of the embodiment comprises the following steps: A1. uniformly mixing a thermoplastic polyurethane resin and a polyethylene glycol-polytetrahydrofuran dihydric alcohol block copolymer, and then melt blending in a double-screw extruder at a temperature of 185℃, with the extrusion screw speed being 100 rpm; A2. flow casting into a film through a T-shaped die head, with the die head discharge temperature being 190℃, the film thickness being controlled to be 12 μm, and being subjected to three-roll cooling and setting, with the cooling roller temperature being 52℃; A3. subjecting the thermoplastic polyurethane film of the embodiment to heat orientation treatment by single-sided contact heating, with the temperature being 132℃ and the time being 11 min, and realizing oriented enrichment of the hydrophilic block by single-sided contact heating plate heating, with the contact pressure being 0.2 MPa, to form a gradient wetting distribution with a hydrophilic surface on the side adhering to the knitted fabric and a hydrophobic surface on the side away from the knitted fabric; A4. after step A3, subjecting the thermoplastic polyurethane film to micropore treatment to form a micropore / microslit array penetrating the film thickness; A5. coating a low surface energy coating layer containing a hydrophobic group on the hydrophobic surface, with the coating amount being 0.9 g / m², the coating amount being determined by the dry weight method, and the micropore / microslit remaining penetrating after coating. The micropore treatment of the embodiment is needle roller micropore treatment, and the needle roller of the embodiment has a regular microneedle array, so that the thermoplastic polyurethane film is subjected to hot pressing in the hot pressing zone of the needle roller and the supporting roller under the conditions of a film surface temperature of 90℃ and a linear pressure of 75 N / mm, to form a discrete penetrating micropore / microslit array with a through-hole diameter of 350 μm and a hole pitch of 1.0 mm and a low opening rate, and the array remains penetrating after subsequent coating. The mass ratio of the thermoplastic polyurethane resin to the polyethylene glycol-polytetrahydrofuran dihydric alcohol block copolymer of the embodiment is 93.5:6.5.

[0057] The preparation method of the polyethylene glycol-polytetrahydrofuran dihydric alcohol block copolymer of the embodiment comprises the following steps:

[0058] B1. Raw material pretreatment: polyethylene glycol with molecular weight of 500 and polytetramethylene glycol with molecular weight of 800 were mixed in a molar ratio of 1:1.5, and dried at a temperature of 95°C under reduced pressure for 1.5h, respectively, to obtain dehydrated polyethylene glycol and polytetramethylene glycol;

[0059] B2. Prepolymerization: under an inert atmosphere, the polytetramethylene glycol obtained in step B1 was reacted with hexamethylene diisocyanate at a molar ratio of NCO groups to OH groups of 2.12, a catalyst dibutyltin dilaurate was added in an amount of 120ppm, and reacted at a temperature of 78°C for 1.2h to obtain an NCO-terminated prepolymer;

[0060] B3. Terminal hydroxyl group capping and block formation: under a temperature of 80°C, the polyethylene glycol obtained in step B1 was reacted at a molar ratio of OH groups to NCO groups of 1.06, and added to the prepolymer obtained in step B2 for continued reaction for 2h to obtain a polyethylene glycol-polytetramethylene glycol terminal hydroxyl group block diol connected by a urethane bond;

[0061] B4. Devolatilization and purification: the reaction product obtained in step B3 is subjected to devolatilization and hot filtration at 90°C under an absolute pressure of 1 kPa to obtain a polyethylene glycol-polytetrahydrofuran diol block copolymer with a hydroxyl value of 84 mgKOH / g and a corresponding number average molecular weight of 1500. The coating step of the low surface energy coating of this example comprises: C1. dissolving the methyl methacrylate-butyl acrylate copolymer in a toluene solvent to prepare a coating liquid with a solid content of 11%; C2. coating the hydrophobic surface of the thermoplastic polyurethane film using a doctor blade coating method, with a doctor blade inclination angle of 37°C and a coating speed of 10 m / min; C3. controlling the coating amount to be 0.9 g / m2, as determined by the dry weight method, and achieving accurate control by adjusting the doctor blade gap and the coating liquid concentration; C4. curing at a temperature of 157°C for 3.5 min to form a uniform low surface energy coating. The knitted fabric of the outer layer of this example is a polyester fiber woven tricot fabric; the intermediate layer of the hydrophilic nonwoven fabric of this example is a spunlace nonwoven fabric made of a mixture of polyvinyl alcohol fibers and polyester fibers in a mass ratio of 3.5:6.5; and the inner layer of the knitted fabric subjected to hydrophilic finishing is a plain knitted fabric made of polyester fibers, treated with a polyethylene glycol monomethyl ether hydrophilic finishing agent, with a surface density of 150 g / m2. The preparation method of this example comprises the following steps: S1. outer layer complex preparation: bonding and combining the hydrophilic surface of the thermoplastic polyurethane film with the knitted fabric, with the thermoplastic polyurethane film located on the outer side of the knitted fabric, using point-like hot pressing to combine, with a combined area accounting for 30% of the total area and a point spacing of 7.5 mm, under a temperature of 130°C and a pressure of 0.35 MPa for 2 min to form an outer layer complex; S2. intermediate layer preparation: selecting a hydrophilic nonwoven fabric with a surface density of 60 g / m2 as the intermediate layer; S3. inner layer preparation: selecting a knitted fabric subjected to hydrophilic finishing as the inner layer; S4. three-layer integrated complex: stacking the knitted fabric surface of the outer layer complex, the intermediate layer of the hydrophilic nonwoven fabric, and the inner layer of the knitted fabric in sequence, with the outer layer complex on the outermost side and the thermoplastic polyurethane film facing outward, and hot pressing using a point-like network of copolyester hot melt adhesive at a temperature of 145°C and a pressure of 0.2 MPa for 3.5 min to form a three-layer integrated complex. The point-like network of copolyester hot melt adhesive in step S4 of this example has a point diameter of 0.55 mm and an area coverage rate of 20%, and the melting temperature of the hot melt adhesive is 140°C.

[0062] Features of Example 1: This example uses moderate parameter configurations, focusing on process stability and reproducibility, and is suitable for standard sports clothing and daily sports and leisure clothing. It has good moisture-wicking and breathable balance performance, moderate production cost, and is suitable for large-scale industrial production.

[0063] Example 2

[0064] The directional moisture-conducting dry and breathable quick-drying fabric is composed of three-layer composite structure arranged from outside to inside in turn, the outer layer composite, the middle layer and the inner layer; the outer layer composite of the embodiment is formed by adhering and compounding a thermoplastic polyurethane film and a knitted fabric, and the thermoplastic polyurethane film is located on the outside of the knitted fabric; the thermoplastic polyurethane film of the embodiment is subjected to heat orientation treatment by single-sided contact heating, so that the hydrophilic block is oriented and enriched, forming a gradient wetting structure with a hydrophilic surface on the side adhering to the knitted fabric and a hydrophobic surface on the side away from the knitted fabric, and the thermoplastic polyurethane film has a micropore / microslit array penetrating the film thickness, so that the fabric has water vapor permeability and air permeability at the same time, and the micropore / microslit remains penetrating after coating and compounding; the middle layer of the embodiment is a hydrophilic non-woven fabric; the inner layer of the embodiment is a hydrophilically finished knitted fabric; the three layers of the embodiment are compounded by a hot melt adhesive point network; the preparation method of the thermoplastic polyurethane film of the embodiment comprises the following steps: A1. uniformly mixing thermoplastic polyurethane resin and polyethylene glycol-polytetrahydrofuran dihydric alcohol block copolymer, then melt blending in a double-screw extruder at a temperature of 180℃, and the extrusion screw speed is 120 rpm; A2. flow casting into a film through a T-shaped die head, the die head discharge temperature is 185℃, the film thickness is controlled to be 10μm, and three-roll cooling is performed for shaping, and the cooling roller temperature is 45℃; A3. the thermoplastic polyurethane film of the embodiment is subjected to heat orientation treatment by single-sided contact heating, the temperature is 145℃, the time is 15 min, the hydrophilic block is oriented and enriched by using single-sided contact heating plate heating mode, the contact pressure is 0.3MPa, and a gradient wetting distribution with a hydrophilic surface on the side adhering to the knitted fabric and a hydrophobic surface on the side away from the knitted fabric is formed; A4. after step A3, the thermoplastic polyurethane film is subjected to micropore treatment to form a micropore / microslit array penetrating the film thickness; A5. a low surface energy coating layer containing a hydrophobic group is coated on the hydrophobic surface, the coating amount is 1.2g / m², the coating amount is determined by dry weight method, and the micropore / microslit remains penetrating after coating. The micropore treatment of the embodiment is needle roller micropore treatment, the needle roller of the embodiment has a regular microneedle array, so that the thermoplastic polyurethane film passes through the hot pressing area of the needle roller and the supporting roller under the conditions of a film surface temperature of 85℃ and a linear pressure of 95N / mm, to form a discrete penetrating micropore / microslit array with a through-hole diameter of 240μm, a hole distance of 0.9mm and a low opening rate on the film, and the array remains penetrating after subsequent coating. The hydrophobic surface of the embodiment is coated with a low surface energy coating layer containing a hydrophobic group with a mass of 1.2g / m², and the coating amount is determined by dry weight method. The mass ratio of the thermoplastic polyurethane resin and the polyethylene glycol-polytetrahydrofuran dihydric alcohol block copolymer of the embodiment is 92:8.

[0065] The preparation method of the polyethylene glycol-polytetrahydrofuran dihydric alcohol block copolymer of the embodiment comprises the following steps:

[0066] B1. Raw material pretreatment: polyethylene glycol with molecular weight of 450 and polytetramethylene glycol with molecular weight of 900 were mixed in a molar ratio of 1:1.8, and dried at a temperature of 105°C under reduced pressure for 1 h, respectively, to obtain dehydrated polyethylene glycol and polytetramethylene glycol;

[0067] B2. Prepolymerization: under an inert atmosphere, the polytetramethylene glycol obtained in step B1 was reacted with hexamethylene diisocyanate at a molar ratio of NCO groups to OH groups of 2.18, a catalyst dibutyltin dilaurate was added in an amount of 180 ppm, and reacted at a temperature of 82°C for 0.8 h to obtain an NCO-terminated prepolymer;

[0068] B3. Hydroxyl-terminated end-capping and block formation: the polyethylene glycol obtained in step B1 was reacted at a temperature of 75°C at a molar ratio of OH groups to NCO groups of 1.08, and added to the prepolymer obtained in step B2 for further reaction for 2.5 h to obtain a polyethylene glycol-polytetramethylene glycol hydroxyl-terminated block diol connected by urethane bonds;

[0069] B4. Devolatilization and purification: the reaction product obtained in step B3 was devolatilized and heat-filtered at 95°C under an absolute pressure of 0.8 kPa to obtain a polyethylene glycol-polytetramethylene glycol diol block copolymer with a hydroxyl value of 68 mgKOH / g and a corresponding number average molecular weight of 1800.

[0070] The coating step of the low surface energy coating of the present example comprises: C1. dissolving methyl methacrylate-butyl acrylate copolymer in butanone solvent to prepare a coating solution with a solid content of 15%; C2. coating the hydrophobic surface of the thermoplastic polyurethane film by using a doctor blade coating method, the inclination angle of the doctor blade is 45°, and the coating speed is 15 m / min; C3. controlling the coating amount to be 1.2 g / m2, the coating amount is determined by the dry weight method, and the precise control is achieved by adjusting the doctor blade gap and the concentration of the coating solution; C4. curing at a temperature of 165℃ for 5 min to form a uniform low surface energy coating. The knitted fabric of the outer layer of the present example is a weft-knitted fabric knitted by polyamide fibers; the intermediate layer of the present example is a needle-punched non-woven fabric mixed by polyvinyl alcohol fibers and polyester fibers at a mass ratio of 5:5; and the inner layer of the present example is a rib-knitted fabric knitted by polyamide fibers, which is treated by a hydroxyethyl cellulose hydrophilic finishing agent, and the surface density is 200 g / m2. The preparation method of the present example comprises the following steps: S1. outer layer complex preparation: bonding and combining the hydrophilic surface of the thermoplastic polyurethane film with the knitted fabric, so that the thermoplastic polyurethane film is located on the outer side of the knitted fabric, using strip-shaped hot-pressing combination, the combined area accounts for 40% of the total area, the distance between the combined points is 5 mm, and the combination is carried out under the conditions of a temperature of 140℃ and a pressure of 0.5 MPa for 3 min to form an outer layer complex; S2. intermediate layer preparation: selecting a hydrophilic non-woven fabric with a surface density of 80 g / m2 as the intermediate layer; S3. inner layer preparation: selecting a knitted fabric treated by a hydrophilic finishing agent as the inner layer; S4. three-layer integrated combination: stacking the knitted fabric surface of the outer layer complex, the intermediate layer hydrophilic non-woven fabric and the inner layer knitted fabric in sequence, the outer layer complex is on the outermost side and the thermoplastic polyurethane film faces outward, and the combination is carried out by using a point-shaped network of copolyester hot melt adhesive under the conditions of a temperature of 150℃ and a pressure of 0.3 MPa for 5 min to form a three-layer integrated composite fabric. The point diameter of the point-shaped network of copolyester hot melt adhesive in step S4 of the present example is 0.8 mm, the area coverage rate is 25%, and the melting temperature of the hot melt adhesive is 150℃.

[0071] Example 2 features: the present example adopts high-strength moisture-conducting optimization configuration, the heat orientation treatment condition is relatively sufficient, the hydrophobic coating thickness is the largest, the proportion of polyvinyl alcohol fibers is relatively high, and it is specially designed for strengthening the one-way moisture-conducting performance, which is suitable for high-strength sports equipment, professional sports clothing and extreme sports clothing, and has excellent rapid moisture-conducting and dry-keeping ability.

[0072] Example 3

[0073] The directional moisture-conducting dry and breathable quick-drying fabric is composed of three-layer composite structure arranged from outside to inside in turn, the outer layer composite, the middle layer and the inner layer; the outer layer composite of the embodiment is formed by adhering and compounding a thermoplastic polyurethane film and a knitted fabric, and the thermoplastic polyurethane film is located on the outside of the knitted fabric; the thermoplastic polyurethane film of the embodiment is subjected to heat orientation treatment by single-sided contact heating, so that the hydrophilic block is oriented and enriched, forming a gradient wetting structure with a hydrophilic surface on the side adhering to the knitted fabric and a hydrophobic surface on the side away from the knitted fabric, and the thermoplastic polyurethane film has a micropore / microslit array penetrating the film thickness, so that the fabric has water vapor permeability and air permeability at the same time, and the micropore / microslit remains penetrating after coating and compounding; the middle layer of the embodiment is a hydrophilic non-woven fabric; the inner layer of the embodiment is a hydrophilically finished knitted fabric; the three layers of the embodiment are compounded by a hot melt adhesive point network; the preparation method of the thermoplastic polyurethane film of the embodiment comprises the following steps: A1. uniformly mixing a thermoplastic polyurethane resin and a polyethylene glycol-polytetrahydrofuran dihydric alcohol block copolymer, and then melt blending in a double-screw extruder at a temperature of 190℃, with the extrusion screw speed being 80 rpm; A2. forming a film by flow casting through a T-shaped die head, with the die head discharge temperature being 195℃, and the film thickness being controlled at 15 μm, and then being subjected to three-roll cooling and setting, with the cooling roller temperature being 60℃; A3. subjecting the thermoplastic polyurethane film of the embodiment to heat orientation treatment by single-sided contact heating, with the temperature being 120℃ and the time being 8 min, and realizing oriented enrichment of the hydrophilic block by single-sided contact heating plate heating, with the contact pressure being 0.1 MPa, to form a gradient wetting distribution with a hydrophilic surface on the side adhering to the knitted fabric and a hydrophobic surface on the side away from the knitted fabric; A4. after step A3, subjecting the thermoplastic polyurethane film to micropore treatment to form a micropore / microslit array penetrating the film thickness; A5. coating a low surface energy coating layer containing a hydrophobic group on the hydrophobic surface, with the coating amount being 0.6 g / m², and the coating amount being determined by the dry weight method, and the micropore / microslit remaining penetrating after coating. The micropore treatment of the embodiment is needle roller micropore treatment, and the needle roller of the embodiment has a regular microneedle array, so that the thermoplastic polyurethane film passes through the hot pressing area of the needle roller and the supporting roller under the conditions of a film surface temperature of 100℃ and a linear pressure of 65 N / mm, to form a discrete penetrating micropore / microslit array with a through-hole diameter of 420 μm and a hole distance of 1.1 mm and a low opening rate, and the array remains penetrating after subsequent coating. The mass ratio of the thermoplastic polyurethane resin to the polyethylene glycol-polytetrahydrofuran dihydric alcohol block copolymer of the embodiment is 95:5.

[0074] The preparation method of the polyethylene glycol-polytetrahydrofuran dihydric alcohol block copolymer of the embodiment comprises the following steps:

[0075] B1. Raw material pretreatment: polyethylene glycol with molecular weight of 580 and polytetramethylene glycol with molecular weight of 700 were mixed in a molar ratio of 1:1.2, and dried at a temperature of 88°C under reduced pressure for 2h, respectively, to obtain dehydrated polyethylene glycol and polytetramethylene glycol;

[0076] B2. Prepolymerization: under an inert atmosphere, the polytetramethylene glycol obtained in step B1 was reacted with hexamethylene diisocyanate at a molar ratio of NCO groups to OH groups of 2.07, and a catalyst dibutyltin dilaurate was added in an amount of 80ppm, and reacted at a temperature of 75°C for 1.8h to obtain an NCO-terminated prepolymer;

[0077] B3. Hydroxyl-terminated end-capping and block formation: the polyethylene glycol obtained in step B1 was reacted at a molar ratio of OH groups to NCO groups of 1.04, and added to the prepolymer obtained in step B2 for further reaction at a temperature of 85°C for 1.5h to obtain a polyethylene glycol-polytetramethylene glycol hydroxyl-terminated block diol connected by urethane bonds;

[0078] B4. Devolatilization and purification: the reaction product obtained in step B3 was devolatilized and heat-filtered at 85°C under an absolute pressure of 0.5kPa to obtain a polyethylene glycol-polytetramethylene glycol block copolymer diol with a hydroxyl value of 95mgKOH / g and a corresponding number average molecular weight of 1200.

[0079] The coating step of the low surface energy coating of the present embodiment comprises: C1. dissolving methyl methacrylate-butyl acrylate copolymer in toluene solvent to prepare a coating liquid with a solid content of 8%; C2. coating the hydrophobic surface of the thermoplastic polyurethane film by using a doctor blade coating method, the inclination angle of the doctor blade is 30°, and the coating speed is 5 m / min; C3. controlling the coating amount to be 0.6 g / m2, the coating amount is determined by the dry weight method, and the precise control is realized by adjusting the doctor blade gap and the coating liquid concentration; C4. curing at a temperature of 150℃ for 2 min to form a uniform low surface energy coating. The knitted fabric of the outer layer of the present embodiment is a weft-knitted fabric knitted with polyester fibers; the intermediate layer of the present embodiment is a spunlace non-woven fabric mixed with polyvinyl alcohol fibers and polyester fibers at a mass ratio of 2:8; and the inner layer of the present embodiment is a plain-knitted fabric knitted with polyester fibers and treated with a polyethylene glycol monomethyl ether hydrophilic finishing agent, and the surface density is 100 g / m2. The preparation method of the present embodiment comprises the following steps: S1. outer layer composite preparation: bonding and combining the hydrophilic surface of the thermoplastic polyurethane film with the knitted fabric, so that the thermoplastic polyurethane film is located on the outer side of the knitted fabric, point-like hot-pressing is used for bonding, the bonding area accounts for 20% of the total area, the distance between the bonding points is 10 mm, and the bonding is performed at a temperature of 120℃ and a pressure of 0.2 MPa for 1 min to form an outer layer composite; S2. intermediate layer preparation: selecting a hydrophilic non-woven fabric with a surface density of 40 g / m2 as the intermediate layer; S3. inner layer preparation: selecting a knitted fabric treated with a hydrophilic finishing agent as the inner layer; S4. three-layer integrated composite: stacking the knitted fabric surface of the outer layer composite, the intermediate layer hydrophilic non-woven fabric, and the inner layer knitted fabric in sequence, the outer layer composite is on the outermost side and the thermoplastic polyurethane film faces outward, and the three layers are integrated by using a point-like network of copolyester hot melt adhesive to hot-press at a temperature of 140℃ and a pressure of 0.1 MPa for 2 min. The point-like network of copolyester hot melt adhesive in step S4 of the present embodiment has a point diameter of 0.3 mm and an area coverage rate of 15%, and the melting temperature of the hot melt adhesive is 130℃.

[0080] Embodiment 3 features: the present embodiment adopts a lightweight and breathable optimization configuration, focuses on maximizing the breathable performance, and has the lowest hot melt adhesive coverage rate, the largest film thickness, and the smallest bonding area. The surface density of the hydrophilic non-woven fabric is the lightest. The present embodiment is specially designed for strengthening the breathable comfort, and is suitable for lightweight sports clothes, summer sports equipment, and outdoor leisure clothes with high breathable requirements, and has excellent breathable comfort and light hand feeling.

[0081] Embodiment 4

[0082] The directional moisture-conducting dry and breathable quick-drying fabric is composed of three-layer composite structure arranged from outside to inside in turn, the outer layer composite, the middle layer and the inner layer; the outer layer composite of the embodiment is formed by adhering and compounding a thermoplastic polyurethane film and a knitted fabric, and the thermoplastic polyurethane film is located on the outside of the knitted fabric; the thermoplastic polyurethane film of the embodiment is subjected to heat orientation treatment by single-sided contact heating, so that the hydrophilic block is oriented and enriched, forming a gradient wetting structure with a hydrophilic surface on the side adhering to the knitted fabric and a hydrophobic surface on the side away from the knitted fabric, and the thermoplastic polyurethane film has a micropore / microslit array penetrating the film thickness, so that the fabric has water vapor permeability and air permeability at the same time, and the micropore / microslit remains penetrating after coating and compounding; the middle layer of the embodiment is a hydrophilic non-woven fabric; the inner layer of the embodiment is a hydrophilically finished knitted fabric; the three layers of the embodiment are compounded by a hot melt adhesive point network. The preparation method of the thermoplastic polyurethane film of the embodiment comprises the following steps: A1. uniformly mixing thermoplastic polyurethane resin and polyethylene glycol-polytetrahydrofuran dihydric alcohol block copolymer, and then melt blending in a double-screw extruder at a temperature of 188℃, with the extrusion screw speed being 90rpm; A2. forming a film by flow casting through a T-shaped die head, with the die head discharge temperature being 192℃, and the film thickness being controlled at 13μm, and then being subjected to three-roll cooling and setting, with the cooling roller temperature being 55℃; A3. subjecting the thermoplastic polyurethane film of the embodiment to heat orientation treatment by single-sided contact heating, with the temperature being 138℃ and the time being 12min, and realizing oriented enrichment of the hydrophilic block by single-sided contact heating plate heating, with the contact pressure being 0.25MPa, to form a gradient wetting distribution with a hydrophilic surface on the side adhering to the knitted fabric and a hydrophobic surface on the side away from the knitted fabric; A4. after step A3, subjecting the thermoplastic polyurethane film to micropore treatment to form a micropore / microslit array penetrating the film thickness; A5. coating a low surface energy coating layer containing a hydrophobic group on the hydrophobic surface, with the coating amount being 0.8g / m², and the coating amount being determined by the dry weight method, and the micropore / microslit remaining penetrating after coating. The micropore treatment of the embodiment is needle roller micropore treatment, and the needle roller of the embodiment has a regular microneedle array, so that the thermoplastic polyurethane film passes through the hot pressing area of the needle roller and the supporting roller under the conditions of a film surface temperature of 100℃ and a linear pressure of 65N / mm, to form a discrete penetrating micropore / microslit array with a pore diameter of 350μm and a pore distance of 1.1mm and a low opening rate on the film, and the micropore / microslit remains penetrating after subsequent coating.

[0083] The preparation method of the polyethylene glycol-polytetrahydrofuran dihydric alcohol block copolymer of the embodiment comprises the following steps:

[0084] B1. raw material pretreatment: mixing polyethylene glycol with a molecular weight of 400 and polytetrahydrofuran dihydric alcohol with a molecular weight of 1000 at a molar ratio of 1:2.0, drying them respectively under reduced pressure at a temperature of 110℃ for 1h, to obtain dehydrated polyethylene glycol and polytetrahydrofuran dihydric alcohol;

[0085] B2. Prepolymerization: The polytetramethylene glycol obtained from step B1 was reacted with hexamethylene diisocyanate at a molar ratio of NCO groups to OH groups of 2.20 under inert atmosphere, with the addition of a catalyst, dibutyltin dilaurate, at a loading of 200 ppm, at a temperature of 70 °C for 2 h to obtain a NCO-terminated prepolymer;

[0086] B3. Hydroxyl-terminated endcapping and block formation: The polyethylene glycol obtained from step B1 was reacted at a molar ratio of OH groups to NCO groups of 1.10 at a temperature of 90 °C, with the addition of the prepolymer obtained from step B2, for 1 h to obtain a polyethylene glycol-polytetramethylene glycol hydroxyl-terminated block diol linked by urethane bonds;

[0087] B4. Devolatilization and purification: The reaction product obtained from step B3 was devolatilized and hot filtered at 100 °C and 0.3 kPa absolute to obtain a polyethylene glycol-polytetramethylene glycol diol block copolymer with a hydroxyl value of 56 mg KOH / g and a corresponding number average molecular weight of 2000.

[0088] The mass ratio of the thermoplastic polyurethane resin to the polyethylene glycol-polytetrahydrofuran diol block copolymer in this embodiment is 94:6. The coating step of the low surface energy coating in this embodiment comprises: C1. dissolving the methyl methacrylate-butyl acrylate copolymer in butanone solvent to prepare a coating solution with a solid content of 12%; C2. coating the hydrophobic surface of the thermoplastic polyurethane film using a knife coating method, the inclination angle of the knife is 40°, and the coating speed is 12 m / min; C3. controlling the coating amount to be 0.8 g / m2, the coating amount is determined by the dry weight method, and the precise control is achieved by adjusting the knife gap and the concentration of the coating solution; C4. curing at a temperature of 160℃ for 4 min to form a uniform low surface energy coating. The knitted fabric of the outer layer in this embodiment is a tricot fabric knitted with polyamide fibers; the intermediate layer of the hydrophilic non-woven fabric in this embodiment is a needle-punched non-woven fabric mixed with polyvinyl alcohol fibers and polyester fibers at a mass ratio of 4:6; the inner layer of the knitted fabric subjected to hydrophilic finishing in this embodiment is a rib knitted fabric knitted with polyamide fibers, which is treated with a hydroxyethyl cellulose hydrophilic finishing agent, and the areal density is 175 g / m2. The preparation method of this embodiment comprises the following steps: S1. outer layer complex preparation: bonding and combining the hydrophilic surface of the thermoplastic polyurethane film with the knitted fabric, so that the thermoplastic polyurethane film is located on the outer side of the knitted fabric, using strip-shaped hot pressing to combine, the combined area accounts for 35% of the total area, the distance between the combined points is 6 mm, and the combination is carried out under the conditions of a temperature of 135℃ and a pressure of 0.4 MPa for 2.5 min to form an outer layer complex; S2. intermediate layer preparation: selecting a hydrophilic non-woven fabric with an areal density of 65 g / m2 as the intermediate layer; S3. inner layer preparation: selecting a knitted fabric subjected to hydrophilic finishing as the inner layer; S4. three-layer integrated combination: stacking the knitted fabric surface of the outer layer complex, the intermediate layer of the hydrophilic non-woven fabric, and the inner layer of the knitted fabric in sequence, with the outer layer complex being on the outermost side and the thermoplastic polyurethane film facing outward, and carrying out hot pressing through a point-shaped network of copolyester hot melt adhesive under the conditions of a temperature of 148℃ and a pressure of 0.25 MPa for 4 min to form a three-layer integrated composite fabric. The point diameter of the point-shaped network of copolyester hot melt adhesive in step S4 of this embodiment is 0.65 mm, the area coverage rate is 22%, and the melting temperature of the hot melt adhesive is 145℃.

[0089] Embodiment 4 features: this embodiment adopts a balanced configuration of comprehensive performance, the parameter selection is close to the upper limit but maintains safety, the process conditions are relatively strict, the proportion of polyamide fibers is relatively high, and it is specially designed for high durability and balanced comprehensive functions, suitable for high-end outdoor equipment, multifunctional sports clothing, and professional sports equipment for long-term use, with excellent durability and comprehensive functional performance.

[0090] Comparative Example 1: basically the same as Embodiment 1, the difference is that the melt blending temperature in step A1 is 160℃, and other process conditions remain unchanged.

[0091] Comparative Example 2: substantially the same as Example 1, except that the heat orientation treatment temperature in Step A3 is 100℃, and other parameters such as treatment time and contact pressure remain unchanged.

[0092] Comparative Example 3: substantially the same as Example 1, except that the heat orientation treatment time in Step A3 is 5min, and other parameters such as treatment temperature and contact pressure remain unchanged.

[0093] Comparative Example 4: substantially the same as Example 1, except that the contact pressure in Step A3 is 0.05MPa, and other parameters such as treatment temperature and time remain unchanged.

[0094] Comparative Example 5: substantially the same as Example 1, except that the amount of hydrophobic coating in Step A4 is 0.3g / m², and other coating process conditions remain unchanged.

[0095] Comparative Example 6: substantially the same as Example 1, except that the mass ratio of thermoplastic polyurethane resin to polyethylene glycol-polytetrahydrofuran diol block copolymer in Step A1 is 98:2, and other preparation conditions remain unchanged.

[0096] Comparative Example 7: substantially the same as Example 1, except that the molar ratio of polyethylene glycol to polytetrahydrofuran diol in Step B1 is 1:0.5, and other conditions remain unchanged.

[0097] Comparative Example 8: substantially the same as Example 1, except that the molar ratio of polyethylene glycol to polytetrahydrofuran diol in Step B1 is 1:0.8, and the molar ratio of OH groups to NCO groups in Step B3 is adjusted to 1.03.

[0098] Comparative Example 9: substantially the same as Example 1, except that the coating curing temperature in Step C4 is 130℃, and the curing time and other coating conditions remain unchanged.

[0099] Comparative Example 10: substantially the same as Example 1, except that the mass ratio of polyvinyl alcohol fibers to polyester fibers in the intermediate layer hydrophilic non-woven fabric is 1:9, and other material compositions remain unchanged.

[0100] Comparative Example 11: substantially the same as Example 1, except that the composite area accounts for 10% of the total area in Step S1, and other heat pressing composite conditions remain unchanged.

[0101] Comparative Example 12: substantially the same as Example 1, except that the heat pressing composite temperature in Step S1 is 100℃, and other parameters such as pressure and composite time remain unchanged.

[0102] Comparative Example 13: substantially the same as Example 1, except that the heat pressing composite pressure in Step S4 is 0.05MPa, and other conditions such as composite temperature and time remain unchanged.

[0103] Comparative Example 14: substantially the same as Example 1, except that the area coverage of the copolyester hot melt adhesive dot mesh in step S4 is 5%, and other parameters such as dot diameter and melting temperature remain unchanged.

[0104] Comparative Example 15: substantially the same as Example 1, except that the heat setting treatment in step A3 is not performed, and the hydrophobic coating coating in step A4 is directly performed, and other preparation steps and process conditions remain unchanged.

[0105] Performance test: moisture management performance test: the test object is the finished product of the directional moisture management dry and breathable quick-drying fabric. The test purpose is to evaluate the one-way moisture transmission capacity and moisture management rate of the fabric, and to verify the moisture management effect of the gradient wetting structure. The test principle is based on the transmission behavior of liquid in porous materials under capillary effect and gravity, and the moisture management performance is evaluated by measuring the diffusion area and transmission time of the liquid in the fabric. Experimental method: place the fabric sample horizontally on the test rack, add a certain amount of liquid from the center of the fabric using standard test liquid (distilled water or simulated sweat), record the change of diffusion area on both sides of the fabric with time, and measure the time required for the liquid to completely transmit to the other side of the fabric. Standard basis: refer to GB / T21655.1-2008. Key parameters: the test environment temperature is 20±2℃, the relative humidity is 65±4%, the test liquid volume is 0.2mL, the recording time interval is 30 seconds, and the test duration is 10 minutes. Data processing: calculate the one-way transmission index, moisture absorption rate and wetting radius, and evaluate the one-way moisture management effect by the ratio of wetting area on both sides.

[0106] Breathability performance test: the test object is the finished product of the directional moisture management dry and breathable quick-drying fabric. The test purpose is to determine the breathability of the fabric and evaluate the influence of the three-layer composite structure on gas flow. Test principle: under the condition of specified pressure difference, measure the gas flow volume per unit time through the unit area of the sample, and reflect the air permeability resistance of the fabric. Experimental method: clamp the fabric sample on the test head of the air permeability tester, ensure good sealing, and measure the air flow through the fabric under the condition of 100Pa pressure difference, and calculate the air permeability. Standard basis: according to GB / T 5453-1997 "Determination of air permeability of textile fabrics". Key parameters: test area is 20cm², pressure difference is 100Pa, test environment temperature is 20±2℃, relative humidity is 65±4%, and each sample is tested at least 5 points. Data processing: calculate the average air permeability and give the standard deviation, express the air permeability performance in mm / s, and evaluate the air permeability comfort of the fabric.

[0107] Quick-drying performance test: The test object is the finished product of the directional moisture management dry and breathable quick-drying fabric. The test purpose is to evaluate the quick-drying ability of the fabric and measure the time required for the fabric to recover from a wet state to a dry state. The test principle is to measure the change of fabric moisture content with time by controlling the water evaporation process under environmental conditions to evaluate the drying rate. The experimental method is to weigh the fabric sample after complete wetting and record the initial wet weight, then dry naturally under standard environmental conditions, weigh every 5 minutes until the difference between two consecutive weighings is less than 0.1%, and record the weight change at each time point. Standard basis: Refer to GB / T21655.2-2009 "Textiles-Evaluation of the moisture management performance-dynamic moisture transmission method". Key parameters: The test environment temperature is 20±2℃, the relative humidity is 65±4%, the wind speed is 1.0±0.2m / s, the sample size is 10cm×10cm, and the initial moisture content is 100%. Data processing: Calculate the drying rate constant and 90% drying time, draw the drying curve, and evaluate the quick-drying performance grade of the fabric.

[0108] Surface wettability test: The test object is the front and back of the directional moisture management dry and breathable quick-drying fabric. The test purpose is to measure the contact angle difference of the front and back of the fabric and verify the formation effect of the gradient wetting structure. The test principle is based on the wetting behavior of liquid on the surface of solid, and the contact angle of water droplets on the surface of the fabric is measured to evaluate the hydrophilic and hydrophobic properties of the surface. Experimental method: Use a contact angle measuring instrument, drop 2μL of distilled water on the front and back of the fabric, take a picture of the droplet shape within 2 seconds after dropping the liquid, measure the contact angle value, and test at least 10 points on each side. Standard basis: According to ASTM D7334-08. Key parameters: The test environment temperature is 23±2℃, the relative humidity is 50±5%, the droplet volume is 2±0.1μL, the measurement time is 2 seconds after dropping the liquid, and the test point spacing is not less than 1cm. Data processing: Calculate the average value and standard deviation of the contact angle of the front and back, evaluate the gradient wetting effect by the contact angle difference, and the contact angle less than 90° is hydrophilic and greater than 90° is hydrophobic.

[0109] Tensile strength test: The test object is the finished product of the directional moisture management dry and breathable quick-drying fabric. The test purpose is to evaluate the mechanical strength and elongation at break of the fabric and verify the mechanical stability of the three-layer composite structure. The test principle is to apply a gradually increasing tensile load to the fabric by a tensile testing machine until the fabric breaks, and record the maximum tensile force and elongation at break. Experimental method: Prepare standard tensile samples and clamp them on the tensile testing machine, set the tensile speed to 100 mm / min, continuously apply the tensile load until the sample breaks, and record the breaking strength and elongation at break. Standard basis: According to GB / T 3923.1-2013. Key parameters: The sample size is 200mm x 50mm, the clamping distance is 100mm, the tensile speed is 100±10mm / min, the pre-tension is 2N, and the test environment is standard atmospheric conditions. Data processing: Calculate the average value of the breaking strength and elongation at break in the warp and weft directions, evaluate the mechanical property grade of the fabric, and analyze the influence of the composite structure on the strength.

[0110] Washing resistance test: The test object is the finished product of the directional moisture management dry and breathable quick-drying fabric. The test purpose is to evaluate the durability of the functional performance of the fabric and verify the retention ability of the moisture management and air permeability functions after repeated washing. The test principle is to evaluate the influence of washing on the structure and function of the fabric by simulating the actual washing conditions of the accelerated test. Experimental method: The fabric sample is washed according to the standard washing procedure for multiple washing cycles, and the moisture management and air permeability performance are tested after every 5 washes, and the performance changes before and after washing are compared. Standard basis: According to GB / T 8629-2017 "Textile Test Household Washing and Drying Procedure". Key parameters: The washing temperature is 40°C, the washing time is 45 minutes, the detergent concentration is 4g / L, the spin-drying speed is 800rpm, the natural drying, the total washing number is 50 times. Data processing: Calculate the performance retention rate after each washing, draw the performance decay curve, and evaluate the functional durability grade.

[0111] Ultraviolet protection performance test: The test object is a directional moisture management and dry and breathable quick-drying fabric sample. The test purpose is to determine the ultraviolet protection factor (UPF) value and UVA, UVB transmittance of the fabric, and evaluate the ultraviolet protection effect of the fabric. The test principle is based on the attenuation law of ultraviolet radiation through the fabric, and the protection factor is calculated by measuring the transmittance of the fabric to different wavelengths of ultraviolet light. The experimental method is to use an ultraviolet transmittance tester, lay the fabric sample on the test window, and measure the transmittance of the 280-315 nm (UVB) and 315-400 nm (UVA) wave bands respectively, and calculate the UPF value according to the transmittance data, test 5 different parts of each sample. The standard is executed according to GB / T 18830-2009 "Evaluation of the ultraviolet protection performance of textiles". Key parameters: the test environment temperature is 20±2℃, the relative humidity is 65±4%, the sample size is 50mm×50mm, the test beam diameter is 25mm, the integration time is 100ms, and the test point spacing is not less than 10mm. Data processing: calculate the average value and standard deviation of UVA and UVB transmittance, calculate the ultraviolet protection factor according to the formula UPF=40 / T_UVA+T_UVB, UPF value≥40 is good protection, UPF value≥50 is excellent protection.

[0112] Contact coolness performance test: The test object is a directional moisture management and dry and breathable quick-drying fabric sample. The test purpose is to determine the instantaneous coolness degree of the fabric when in contact with the skin, and to evaluate the thermal conductivity and wearing comfort of the fabric. The test principle is based on the instantaneous heat transfer characteristics of the material when in contact with the human skin, and the coolness effect is quantified by measuring the thermal conductivity of the material. The experimental method is to use a contact coolness tester, contact the test probe with a constant temperature of 35℃ with the fabric sample, record the heat flow change within 0.1 seconds in the contact instant, calculate the contact coolness coefficient, and test 8 different parts of each sample. The standard is executed according to GB / T 35263-2017 "Detection and evaluation of the contact instantaneous coolness performance of textiles". Key parameters: the test environment temperature is 20±2℃, the relative humidity is 65±4%, the probe temperature is 35±0.1℃, the contact pressure is 100±10Pa, the test time is 0.1 seconds, and the sample humidification time is not less than 4 hours.

[0113] From Tables 1-3, the performance degradation of each comparative example relative to the examples is mainly due to the combined effects of the following factors: insufficient compatibility and dispersion of TPU / block copolymer due to too low blending temperature, resulting in interface defects and microphase separation, discontinuous moisture transport channels, and decreased mechanical properties and wash resistance; insufficient heat setting temperature, time or contact pressure, which cannot effectively drive the hydrophilic block to concentrate on one side, resulting in a weakened surface energy gradient, a reduced difference between the front and back contact angles, a significantly decreased one-way transport index and a tendency to reabsorb; insufficient hydrophobic coating weight or curing, which reduces the hydrophobicity of the outer surface and the density, solvent resistance and abrasion resistance of the coating, slightly improves the initial air permeability but simultaneously deteriorates the moisture transport and durability, and weakens the fabric's anti-UV function, with the UPF value decreasing from 149-156 in the examples to 118-140 in the comparative examples, and the T(UVA) and T(UVB) transmittance significantly increasing; insufficient hydrophilic block content or unbalanced PEG / PTMG ratio in the formulation, and too low polycondensation temperature, resulting in insufficient block molecular weight and flexibility, weakening the hydrophilic-hydrophobic synergy and chain segment migration ability, with decreased Δθ and diffusion rate, poor membrane toughness and composite interface bonding, a contact cooling coefficient decreasing from 0.19-0.22 J / (cm²·s) in the examples to 0.14-0.17 J / (cm²·s) in the comparative examples, and affecting the wearing comfort; too low PVA ratio in the intermediate layer, which weakens the capillary network and water storage-transport capacity, and decreases one-way moisture transport and increases reabsorption; insufficient temperature / pressure or too low composite area and glue mesh coverage in the primary (S1) and final (S4) compounding, which reduces the effective contact between the layers and the continuous transport channels, slightly improves the air permeability but at the cost of decreased peel strength, interrupted moisture transport path and uneven function; canceling the heat setting fundamentally destroys the gradient wetting structure, resulting in similar wetting properties on the front and back sides, the worst one-way moisture transport, and significantly decreased dryness retention and function retention rate after washing, with the UPF retention rate of Comparative Example 15 being only 45% and the contact cooling coefficient decreasing to the lowest value of 0.14 J / (cm²·s). The overall rule is that any factor that weakens the surface energy gradient, the continuity of the hydrophilic channel, the densification of the coating, and the effective compounding between the layers will result in decreased ODI and Δθ, increased reabsorption, and deteriorated durability, as well as decreased anti-UV performance and cooling function. Conversely, a small decrease in coverage or coating weight can locally improve the air permeability and hand feel, but it is difficult to compensate for the loss of moisture transport directionality, protective function and long-term stability. The examples achieve excellent anti-UV effect with UPF > 140 and good cooling performance with a cooling coefficient of ≥ 0.19 J / (cm²·s) while maintaining excellent moisture transport performance, demonstrating the important role of process optimization in the synergy of multiple functions.

[0114]

[0115]

[0116]

[0117] Figure 1 The one-way wet transfer mechanism of the fabric of the present application is shown: the inner layer is a knitted fabric with hydrophilic finishing, which quickly absorbs and spreads sweat; the middle layer is a hydrophilic non-woven fabric, which constructs a continuous capillary channel to realize the longitudinal transmission and lateral diffusion of sweat; the outer layer is a TPU film / fabric structure combined with knitting, with the inner side of the film being hydrophilic and the outer side being hydrophobic to form a surface energy gradient, which promotes the one-way migration of water from the skin side to the outer side and spreads and evaporates on the outer surface, thereby realizing close dryness, moisture permeability, quick dryness and anti-back permeation.

[0118] Figure 2 The FTIR spectra of the hydrophobic surface, hydrophilic surface and low surface energy coating of the thermoplastic polyurethane film of Example 1 of the present application. The transmission FTIR difference of the three clearly characterizes the surface chemical gradient and coating coverage effect - the hydrophilic surface has stronger absorption at C–O–C stretching band (≈1108–1125 cm⁻¹) and hydrogen bond enhanced urethane C=O (≈1708–1715 cm⁻¹), and the N–H stretching (≈3320 cm⁻¹) is wider, indicating that the PEG / PTMG hydrophilic block is enriched; the hydrophobic surface has relatively stronger free C=O (≈1722–1725 cm⁻¹) and CH2 (≈2920 / 2850 cm⁻¹), reflecting the relative depletion of the hydrophilic block and the increase of the hard segment / hydrocarbon chain proportion; after the hydrophobic surface is coated with a low surface energy acrylate coating, the ester carbonyl peak (≈1730–1733 cm⁻¹) is significantly enhanced and the peak shape is sharper, and at the same time the ester C–O–C high band (≈1240–1270 cm⁻¹) is enhanced, while the contribution of N–H and hydrogen bond C=O of the substrate is obviously weakened, which comprehensively proves that the gradient structure from hydrophilic surface to hydrophobic surface to outer low surface energy coating and the complete coverage of the coating have been established.

[0119] Based on the physical image evidence of Figure 3 It can be clearly observed that the thermoplastic polyurethane film of Example 2 has formed a regular and ordered micropore array structure after being treated with a needle roller micropore. This physical evidence strongly supports the effectiveness and practicality of the technical solution of the present application, and lays a solid structural foundation for the functional realization of the directional wet transfer dry and breathable quick-drying fabric.

[0120] Figures 4 to 8 The technical advantages of the present application are fully demonstrated, among which Figure 4 The one-way transfer index ODI and moisture absorption rate of Examples 1-4 are significantly higher than those of Comparative Examples 1-15, indicating that the present application has excellent wet transfer function; Figure 5 The wet radius and contact angle difference of the examples are better than those of the comparative examples, confirming the improved surface wetting characteristics; Figure 6 The examples not only maintain a high air permeability rate, but also have a shorter drying time, realizing the balance between air permeability and quick drying performance; Figure 7It is shown that the examples are superior to the comparative examples in breaking strength and elongation, ensuring excellent mechanical strength. Figure 8 The test results show that the examples can maintain high ODI and air permeability retention rates after 50 washes, significantly superior to the comparative examples, embodying the outstanding durability and practical value of the material of the present application. Figures 9~11 The test results show that the examples are significantly superior to the comparative examples in terms of UV protection and cool touch performance. The UPF value of the examples reaches 142-156, the cool touch coefficient is 0.19-0.22 J / (cm²·s), the UVA and UVB transmittance is controlled below 2.65%-3.05% and 0.42%-0.52% respectively, and the UPF retention rate after 50 washes still maintains at a high level of 85%-91%; while the UPF value of the comparative examples is only 118-140, the cool touch coefficient drops to 0.14-0.17 J / (cm²·s), the UV transmittance increases significantly, and the UPF retention rate after washing is only 45% at the lowest. This shows that the gradient wetting structure and dense coating formed by optimizing the process parameters not only realize excellent one-way wetting function, but also effectively improve the protective performance and wearing comfort of the fabric, embodying the technical advantages of multi-functional synergistic optimization.

[0121] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, but not to limit it. Although the present application has been described in detail with reference to the above examples, those skilled in the art should understand that any equivalent structural transformation made under the concept of the present application, using the content of the present application specification and drawings, should be covered within the protection scope of the claims of the present application.

Claims

1. A directional moisture management dry-feeling, breathable, quick-drying fabric, characterized in that, The three-layer composite structure is composed of an outer layer composite, an intermediate layer and an inner layer arranged from outside to inside; the outer layer composite is formed by laminating a thermoplastic polyurethane film with a knitted fabric, and the thermoplastic polyurethane film is located on the outside of the knitted fabric; the thermoplastic polyurethane film is subjected to heat orientation treatment by single-sided contact heating, so that the hydrophilic block is enriched and oriented, forming a gradient wetting structure with a hydrophilic surface on the side close to the knitted fabric and a hydrophobic surface on the side away from the knitted fabric, and the thermoplastic polyurethane film has a micropore / microslit array penetrating the film thickness, so that the fabric has water vapor permeability and air permeability, and the micropore / microslit remains penetrating after coating and lamination; the intermediate layer is a hydrophilic non-woven fabric; the inner layer is a knitted fabric subjected to hydrophilic finishing; the three layers are laminated by a point-shaped network of hot melt adhesive; the preparation method of the thermoplastic polyurethane film comprises the following steps: A1. uniformly mix the thermoplastic polyurethane resin and the polyethylene glycol-polytetrahydrofuran diol block copolymer, and then melt blend in a twin-screw extruder at a temperature of 180-190℃, with the extrusion screw speed being 80-120rpm; A2. cast film formation by T-shaped die, with the die discharge temperature being 185-195℃, the film thickness being controlled to be 10-15μm, and three-roll cooling and setting, with the cooling roller temperature being 45-60℃; A3. heat orientation treatment of the thermoplastic polyurethane film by single-sided contact heating, with the temperature being 120-145℃ and the time being 8-15min, and the hydrophilic block is enriched and oriented by single-sided contact heating plate heating, with the contact pressure being 0.1-0.3MPa, forming a gradient wetting distribution with a hydrophilic surface on the side close to the knitted fabric and a hydrophobic surface on the side away from the knitted fabric; A4. After step A3, the thermoplastic polyurethane film is subjected to micropore treatment to form a micropore / microslit array penetrating the film thickness; A5. coating a low-surface-energy coating containing a hydrophobic group on the hydrophobic surface, with the coating amount being 0.6-1.2g / m², and the coating amount being determined by dry weight method, and the micropore / microslit remains penetrating after coating.

2. A directional moisture management and dry-feeling, breathable, quick-drying fabric according to claim 1, characterized in that, The micropore treatment is needle roller micropore treatment, and the needle roller has a regular microneedle array, so that the thermoplastic polyurethane film forms a discrete penetrating micropore / microslit array with a pore diameter of 240-500μm and a pore distance of 0.8-1.2mm and a low opening rate under the conditions of a film surface temperature of 80-100℃ and a linear pressure of 60-100N / mm in the hot pressing zone of the needle roller and the supporting roller, and the micropore / microslit remains penetrating after subsequent coating.

3. A directional moisture management and dry-feeling, breathable, quick-drying fabric according to claim 1, wherein, The mass ratio of the thermoplastic polyurethane resin to the polyethylene glycol-polytetrahydrofuran diol block copolymer is 92-95:5-8.

4. A directional moisture-wicking, dry-feeling, breathable, fast-drying fabric as claimed in claim 1, wherein, The preparation method of the polyethylene glycol-polytetrahydrofuran diol block copolymer comprises the following steps: B1. Raw material pretreatment: polyethylene glycol with molecular weight of 400-600 and polytetramethylene glycol with molecular weight of 650-1000 were mixed in a molar ratio of 1:1.0-2.0, and then dried at a temperature of 80-110℃ under reduced pressure for 1-2h, respectively, to obtain dehydrated polyethylene glycol and polytetramethylene glycol; B2. Prepolymerization: under an inert atmosphere, the polytetramethylene glycol obtained in step B1 was reacted with hexamethylene diisocyanate at a molar ratio of NCO groups to OH groups of 2.05-2.20, a catalyst of dibutyltin dilaurate was added in an amount of 50-200ppm, and the reaction was carried out at a temperature of 70-85℃ for 0.5-2h to obtain an NCO-terminated prepolymer; B3. End hydroxyl group capping and block formation: the polyethylene glycol obtained in step B1 was reacted with the prepolymer obtained in step B2 at a molar ratio of OH groups to NCO groups of 1.02-1.10 at a temperature of 70-90℃, and the reaction was continued for 1-3h to obtain a polyethylene glycol-polytetramethylene glycol end hydroxyl group block diol connected by a urethane bond; B4. Devolatilization and purification: the reaction product obtained in step B3 was devolatilized and heat-filtered at 80-100℃ under an absolute pressure of ≤1kPa to obtain a polyethylene glycol-polytetramethylene glycol block copolymer with a hydroxyl value of 56-112mgKOH / g and a corresponding number average molecular weight of 1000-2000.

5. A directional moisture-wicking, dry-feeling, breathable, fast-drying fabric as defined in claim 1, wherein, The coating step of the low surface energy coating layer comprises: C1. Dissolve the methyl methacrylate-butyl acrylate copolymer in toluene or methyl ethyl ketone solvent to prepare a coating solution with a solid content of 8-15%; C2. Coating is carried out on the hydrophobic surface of the thermoplastic polyurethane film using a doctor blade coating method, with a doctor blade inclination angle of 30-45° and a coating speed of 5-15m / min; C3. The coating amount is controlled to be 0.6-1.2g / m², and the coating amount is determined by dry weight method, and precise control is achieved by adjusting the doctor blade gap and the concentration of the coating solution; C4. Curing at a temperature of 150-165℃ for 2-5min to form a uniform low surface energy coating layer.

6. A directional moisture-wicking, dry-feeling, breathable, fast-drying fabric as defined in claim 1, wherein, The knitted fabric of the outer layer composite is a polyester fiber or polyamide fiber woven warp-knitted fabric or weft-knitted fabric; the hydrophilic non-woven fabric of the middle layer is a spunlace non-woven fabric or needle punch non-woven fabric made of polyvinyl alcohol fiber and polyester fiber mixed in a mass ratio of 2:8 to 5:5; the knitted fabric of the inner layer is a plain knitted fabric or rib knitted fabric woven with polyester fiber or polyamide fiber, treated with polyethylene glycol monomethyl ether or hydroxyethyl cellulose hydrophilic finishing agent, and the areal density is 100-200g / m².

7. The method for preparing the directional moisture conducting, dry-feeling, breathable and quick-drying fabric according to any one of claims 1-6, characterized in that, The method comprises the following steps: S1. Outer layer composite preparation: the hydrophilic surface of the thermoplastic polyurethane film is laminated and compounded with the knitted fabric, so that the thermoplastic polyurethane film is located on the outer side of the knitted fabric, and point or strip hot pressing is used for compounding, the compounding area accounts for 20-40% of the total area, the compounding point spacing is 5-10mm, and the compounding is carried out at a temperature of 120-140℃ and a pressure of 0.2-0.5MPa for 1-3min to form an outer layer composite; S2. Intermediate layer preparation: hydrophilic non-woven fabric with a surface density of 40-80 g / m2 is selected as the intermediate layer; S3. Inner layer preparation: hydrophilic finished knitted fabric is selected as the inner layer; S4. Three-layer integrated composite: the knitted fabric surface of the outer layer composite, the hydrophilic non-woven fabric of the intermediate layer, and the knitted fabric of the inner layer are sequentially stacked, with the outer layer composite on the outermost side and the thermoplastic polyurethane film facing outward, and the three layers are integrated by hot pressing the copolyester hot melt adhesive point net under the conditions of temperature 140-150℃, pressure 0.1-0.3 MPa for 2-5 min.

8. A method of making a directional moisture-wicking, dry-feeling, breathable, fast-drying fabric as claimed in claim 7, characterized in that, The adhesive point diameter of the copolyester hot melt adhesive point net in step S4 is 0.3-0.8 mm, the area coverage rate is 15-25%, and the melting temperature of the hot melt adhesive is 130-150℃.

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