One-way moisture-conducting watermarking-free functional eyelet fabric and production method thereof

Abstract

The invention relates to a one-way moisture-conducting watermarking-free functional eyelet fabric and a production method thereof. Comprising a polyester quick-drying surface layer, a polyester hydrophobic inner layer and a connecting layer for connecting the polyester quick-drying surface layer and the polyester hydrophobic inner layer, the polyester hydrophobic inner layer is obtained by hydrophobic treatment of a hydrophobic treatment agent; the hydrophobic treatment agent is prepared from waterborne polyurethane resin, a waterborne polyisocyanate cross-linking agent, hydroxyl alkyl silicone wax, double-alcohol hydroxyl single-end-capped long-chain alkyl silicone oil and a processing aid; the polyester quick-drying surface layer is obtained by performing hydrophilic treatment on a hydrophilic quick-drying treatment agent; the hydrophilic quick-drying treatment agent is prepared from a water-based hydroxyl polyurethane dispersion, hydroxyl-terminated hyperbranched polyester, N-(beta-aminoethyl)-gamma-aminopropyl triethoxy silane, liquid polycaprolactone polyol, poly (methyl vinyl ether-ALT-maleic anhydride), sulfonated nano cellulose, blocked water-based polyisocyanate and a processing aid. The eyelet fabric prepared by the scheme has the advantages of moisture conductivity, quick drying, no watermark, durability and the like.

Description

Technical Field

[0001] This application relates to the field of fabric processing technology, and more specifically, it relates to a unidirectional moisture-wicking, watermark-free functional mesh fabric and its production method. Background Technology

[0002] Mesh fabric is a breathable material with porous structures, available in single-layer and multi-layer varieties, and widely used in sportswear, outdoor gear, and underwear. In the development of functional fabrics, efficient sweat management is a core focus. However, traditional mesh fabrics and existing improved fabrics commonly suffer from watermarks, reduced moisture wicking properties, and pilling. Watermarks primarily occur because moisture cannot be quickly and directionally wicked away from the fabric, leaving some sweat residue between the surface fibers. After the moisture evaporates, the adsorbed metabolic waste or additive residues on the fiber surface leave noticeable marks, severely impacting the fabric's appearance and user experience. While traditional mesh fabrics offer basic breathability, they also suffer from the problem of "dampness in the inner layer"—due to the lack of an effective one-way conduction mechanism, sweat cannot be effectively wicked away, easily accumulating in the inner layer, leading to a sticky, damp, and uncomfortable feeling when worn close to the skin. Furthermore, with increased washing frequency, the moisture wicking performance of various fabrics significantly decreases, and some fabrics may experience pilling and wear, failing to meet the needs of high-end applications.

[0003] To address these issues, the industry has made several attempts: First, using hydrophilic layers or finishing agents to improve moisture-wicking properties. However, these methods only allow for simple diffusion of moisture within the fabric, cannot control the direction of moisture transfer, and have poor durability, with the moisture-wicking effect significantly diminishing after multiple washes. Second, increasing fabric thickness or using layering to achieve temperature regulation comes at the cost of sacrificing fabric breathability and lightweight, making it difficult to meet both the dual needs of heat insulation and breathability.

[0004] In existing technologies, there are three main methods to achieve unidirectional moisture wicking: The first method is to use polyester profiled cross-section absorbent fibers or cotton fibers for the outer layer and polypropylene fibers for the inner layer. Although this method can achieve a better unidirectional moisture wicking effect, polyester profiled cross-section fibers have defects such as insufficient strength and easy pilling after long-term use, which affects the service life of the fabric. The second method is to treat the outer layer with moisture-wicking and quick-drying agents to enhance the moisture wicking effect, or to use fluorinated agents to treat the inner layer with hydrophobicity, thereby increasing the difference in hydrophobicity between the outer and inner layers to improve the water wicking capacity. However, fluorinated agents have potential environmental hazards and do not meet the requirements of green environmental protection. The third method is to add natural absorbent fibers such as cotton to the fabric for blending. The introduction of natural absorbent fibers increases the water absorption performance, thus achieving a significant improvement in moisture wicking. However, after long-term use and multiple washes, the moisture wicking capacity will still decrease, the fabric will pill, and watermarks will appear.

[0005] The fabrics prepared using the existing methods described above all suffer from core defects. They struggle to simultaneously achieve excellent moisture absorption and quick-drying properties while consistently resolving issues such as watermarking, moisture wicking degradation, and pilling. Furthermore, these defects become increasingly pronounced with increased washing frequency, making it difficult to meet the comprehensive demands of high-end applications for fabrics that are "comfortable, dry, aesthetically pleasing, and durable." Therefore, there is an urgent need to develop a unidirectional moisture-wicking, watermark-free functional mesh fabric that can address these shortcomings. Summary of the Invention

[0006] To further improve the durability of mesh fabric while maintaining its basic properties of unidirectional moisture wicking, quick drying, and watermark-free properties, a unidirectional moisture wicking and watermark-free mesh fabric and its preparation method are provided.

[0007] In a first aspect, a one-way moisture-wicking, watermark-free functional mesh fabric includes a polyester quick-drying outer layer, a polyester hydrophobic inner layer, and a connecting layer for connecting the polyester quick-drying outer layer and the polyester hydrophobic inner layer; the polyester hydrophobic inner layer is obtained by hydrophobic treatment with a hydrophobic agent. The hydrophobic treatment agent includes: waterborne polyurethane resin, waterborne polyisocyanate crosslinking agent, hydroxyalkyl silicone wax, diol hydroxyl-terminated long-chain alkyl silicone oil, and processing aids. The polyester quick-drying surface layer is obtained by hydrophilic treatment with a hydrophilic quick-drying agent, which includes: waterborne hydroxyl polyurethane dispersion, hydroxyl-terminated hyperbranched polyester, N-(β-aminoethyl)-γ-aminopropyltriethoxysilane, liquid polycaprolactone polyol, poly(methyl vinyl ether-ALT-maleic anhydride), sulfonated nanocellulose, blocked waterborne polyisocyanate, and processing aids.

[0008] Mesh fabric has a quick-drying polyester outer layer, a hydrophobic polyester inner layer, and a bonding layer. The high strength of polyester material can reduce wear and pilling during repeated washing, thus improving durability.

[0009] The polyester hydrophobic inner layer is treated with a specific hydrophobic treatment agent, in which waterborne polyurethane resin provides a stable substrate for the hydrophobic film layer; waterborne polyisocyanate crosslinking agent is the main crosslinking curing agent, and together with diol hydroxyl-terminated long-chain alkyl silicone oil, it enhances the stability of the crosslinking system; hydroxyl alkyl silicone wax forms a double-layer hydrophobic effect and strengthens the hydrophobic effect; processing aids assist in film formation, thereby forming a stable and durable hydrophobic film layer on the surface of polyester fiber and improving hydrophobicity.

[0010] The polyester quick-drying surface layer is treated with a hydrophilic quick-drying agent. The hydroxyl-terminated hyperbranched polyester and N-(β-aminoethyl)-γ-aminopropyltriethoxysilane ensure the durability of the hydrophilic function. Liquid polycaprolactone polyol improves the flexibility and hydrolysis resistance of the hydrophilic layer. Poly(methyl vinyl ether-ALT-maleic anhydride) provides moisture conduction channels, and sulfonated nanocellulose enhances water absorption. The components work synergistically to form a stable hydrophilic film on the surface of the polyester fiber, improving hydrophilicity and quick-drying properties. This allows the fabric to maintain good moisture-wicking performance even after long-term washing, avoiding sweat residue and solving the watermark problem. At the same time, it reduces pilling and wear, giving the mesh fabric excellent one-way moisture wicking and watermark-free effects, improving overall quality and meeting the needs of high-end application scenarios.

[0011] In summary, both the quick-drying polyester outer layer and the hydrophobic polyester inner layer of this application are made of polyester fibers to give the fabric basic durability. Based on this, the hydrophobic polyester inner layer is treated with specific hydrophobic agents (waterborne polyurethane resin, waterborne polyisocyanate crosslinking agent, hydroxyalkyl silicone wax, diol hydroxyl-terminated long-chain alkyl silicone oil, and processing aids). These components synergistically form a stable hydrophobic film on the surface of the polyester fibers, improving hydrophobicity and ensuring the durability of the hydrophobic function.

[0012] The polyester quick-drying surface layer is treated with a hydrophilic quick-drying agent, in which terminal hydroxyl hyperbranched polyester, N-(β-aminoethyl)-γ-aminopropyltriethoxysilane, liquid polycaprolactone polyol, poly(methyl vinyl ether-ALT-maleic anhydride), and sulfonated nanocellulose all contain active groups. These groups interact with each other and further react, crosslink, or blend with the waterborne hydroxyl polyurethane dispersion and the blocked waterborne polyisocyanate, enabling the hydrophilic quick-drying agent to adhere stably to the surface of the polyester fiber, forming a stable absorbent layer with high water absorption and quick-drying properties. It is also not easy to fall off after multiple washes, resulting in a better water absorption retention rate.

[0013] This hydrophilic quick-drying agent, combined with the hydrophobic inner layer of polyester prepared in this application, achieves superior moisture-wicking properties and watermark-free characteristics. Furthermore, after 50 washes, the fabric retains over 93% moisture absorption and over 90% hydrophobicity, achieving an abrasion resistance rating of 4, far exceeding the 2-level abrasion resistance rating of polyester profiled fibers. This effectively solves the defects of existing fabrics, such as moisture wicking degradation and pilling / wear after long-term washing, significantly improving the overall quality of the fabric.

[0014] Preferably, the hydrophobic treatment agent comprises, by weight percentage, 45-55% waterborne polyurethane resin, 5-10% waterborne polyisocyanate crosslinking agent, 10-15% hydroxyalkyl silicone wax, 3-8% diol hydroxy mono-terminated long-chain alkyl silicone oil, 2-5% processing aids, and water to make up to 100%.

[0015] The mesh fabric is composed of a quick-drying polyester outer layer, a hydrophobic polyester inner layer, and a connecting layer. The hydrophobic polyester inner layer is treated with a hydrophobic agent containing water-based polyurethane resin and water-based polyisocyanate crosslinking agent. The quick-drying polyester outer layer is treated with a hydrophilic quick-drying agent containing water-based hydroxyl polyurethane dispersion and other components. This process improves the fabric's durability, hydrophobicity, hydrophilicity, and quick-drying properties, and solves problems such as watermarking and moisture wicking degradation. By specifying the weight percentage of each component in the hydrophobic agent, the proportions of each component can be more precise and reasonable. This allows the water-based polyurethane resin to better provide a stable base for the hydrophobic film layer. The water-based polyisocyanate crosslinking agent and the diol hydroxyl mono-terminated long-chain alkyl silicone oil can more effectively exert their crosslinking effect to enhance the stability of the system. The hydroxyl alkyl silicone wax can better form a double-layer hydrophobic effect and strengthen the hydrophobic effect. Processing aids can better assist the components in fully integrating and stabilizing the film formation, thereby further improving the hydrophobicity and durability of the hydrophobic function of the polyester hydrophobic inner layer.

[0016] Preferably, the hydrophobic treatment agent is prepared by the following method: according to weight percentage, a portion of processing aids and a portion of water are weighed and mixed evenly, and then hydroxyalkyl silicone wax is added and ground to a particle size of <5μm to obtain a wax powder pre-dispersion liquid; according to weight percentage, the remaining water and waterborne polyurethane resin are added to a reaction vessel, stirred evenly, and then diol hydroxyl-terminated long-chain alkyl silicone oil is added and stirred evenly. The wax powder pre-dispersion liquid is slowly added while stirring, and the remaining processing aids are added and mixed evenly. The pH is then adjusted to 7.5-8, filtered, and A premixed dispersion is obtained. When using, A premixed dispersion is thoroughly mixed with waterborne polyisocyanate crosslinking agent to obtain the hydrophobic treatment agent.

[0017] First, a portion of the processing aids is mixed with a portion of water, and then hydroxyalkyl silicone wax is added and ground to obtain a wax powder pre-dispersion. Then, the remaining water, waterborne polyurethane resin, and diol hydroxyl-terminated long-chain alkyl silicone oil are mixed, added to the wax powder pre-dispersion, and the pH value is adjusted. After filtration, premixed dispersion A is obtained. When used, this is mixed with a waterborne polyisocyanate crosslinking agent, which allows the components of the hydrophobic treatment agent to fully integrate and stably form a film, thereby forming a stable hydrophobic film layer on the surface of the polyester fiber. This significantly improves the hydrophobicity of the polyester hydrophobic inner layer and ensures that the film layer is not easily detached or worn during long-term use and repeated washing, ensuring the durability of the hydrophobic function. Simultaneously, due to the selection of specific proportions of hydrophobic treatment agent components and this preparation method, combined with the fact that both the polyester quick-drying outer layer and the polyester hydrophobic inner layer are made of polyester fiber, and the polyester quick-drying outer layer is treated with a hydrophilic quick-drying agent, the mesh fabric possesses excellent one-way moisture wicking and watermark-free effects. This effectively solves the defects of existing fabrics such as moisture wicking degradation, pilling, and wear after long-term washing, significantly improving the overall quality of the fabric.

[0018] Preferably, by weight percentage, the hydrophilic quick-drying treatment agent comprises 30-50% aqueous hydroxyl polyurethane dispersion, 1-5% terminal hydroxyl hyperbranched polyester, 2-5% N-(β-aminoethyl)-γ-aminopropyltriethoxysilane, 3-7% liquid polycaprolactone polyol, 1-3% poly(methyl vinyl ether-ALT-maleic anhydride), 1-2.5% sulfonated nanocellulose, 5-8% blocked aqueous polyisocyanate, 0.1-0.5% processing aids, and water to 100%.

[0019] The polyester quick-drying outer layer and the polyester hydrophobic inner layer of the mesh fabric are made of polyester fibers, which can reduce wear and pilling during repeated washing and improve durability. The components of the hydrophilic quick-drying treatment agent are compounded in this ratio. The hydroxyl-terminated hyperbranched polyester and N-(β-aminoethyl)-γ-aminopropyltriethoxysilane synergistically improve the adhesion stability between the layer and the polyester fibers, ensuring the durability of the hydrophilic function. Liquid polycaprolactone polyol improves the flexibility and hydrolysis resistance of the hydrophilic layer and prevents the hydrophilic layer from falling off. Poly(methyl vinyl ether-ALT-maleic anhydride) forms a highly absorbent hydrogel layer, providing a channel for rapid moisture conduction. Sulfonated nanocellulose enhances the water absorption capacity of the fabric and can form a stable hydrophilic film layer on the surface of polyester fibers, significantly improving the fabric's hydrophilicity and quick-drying properties. This allows the fabric to maintain excellent moisture-wicking performance even after long-term washing, effectively preventing sweat residue, solving watermark problems, and reducing pilling and wear.

[0020] Preferably, the hydrophilic quick-drying treatment agent is prepared by the following method: 1) Divide the water into three parts and the processing aid into two parts; weigh the first part of water and the first part of processing aid and mix them together. Slowly add the aqueous polyurethane dispersion while stirring, and stir until uniform. Then add the hydroxyl-terminated hyperbranched polyester and liquid polycaprolactone polyol, and stir until uniform to obtain dispersion A; activate N-(β-aminoethyl)-γ-aminopropyltriethoxysilane with the second part of hydrolysis to obtain dispersion B; disperse sulfonated nanocellulose in the third part of water and the second part of processing aid to form nano suspension C. 2) Add dispersion B to dispersion A and mix evenly. Then slowly add poly(methyl vinyl ether-ALT-maleic anhydride), mix evenly, then add nano suspension C, mix evenly, adjust pH to ≤7, filter, and obtain hydrophilic fast-drying solution E. 3) Before hydrophilic treatment, mix hydrophilic quick-drying liquid E with blocked waterborne polyisocyanate to obtain hydrophilic quick-drying treatment agent.

[0021] The above method for preparing hydrophilic quick-drying agents ensures thorough mixing and reaction of all components. When the hydrophilic quick-drying agent prepared by this method is used to treat the polyester quick-drying surface layer, the hydroxyl-terminated hyperbranched polyester and N-(β-aminoethyl)-γ-aminopropyltriethoxysilane synergistically enhance the adhesion stability between the layer and the polyester fibers, ensuring the durability of the hydrophilic function. Liquid polycaprolactone polyol effectively improves the flexibility and hydrolysis resistance of the hydrophilic layer, preventing it from peeling off. Poly(methyl vinyl ether-ALT-maleic anhydride) forms a highly absorbent hydrogel layer, providing a channel for rapid moisture conduction. Sulfonated nanocellulose greatly enhances the fabric's water absorption capacity, thereby forming a stable hydrophilic film layer on the polyester fiber surface, significantly improving the fabric's hydrophilicity and quick-drying properties. This allows the fabric to maintain excellent moisture-wicking performance even after long-term washing, effectively preventing sweat residue and solving the watermark problem at its source, while further reducing pilling and abrasion.

[0022] Preferably, the specifications of the polyester quick-drying surface layer are: fiber is 75D-150D, mesh size is 0.1-2mm, structure is warp-knitted hexagonal mesh structure, and weight is 80-120g / ㎡.

[0023] By setting the fiber specifications of the polyester quick-drying surface layer to 75D-150D, the mesh size to 0.1-2mm, the structure to a warp-knitted hexagonal mesh structure, and the weight to 80-120g / ㎡, the polyester quick-drying surface layer can be combined with the polyester hydrophobic inner layer to further optimize the performance of the unidirectional moisture-wicking, watermark-free functional mesh fabric, and better meet the usage needs of high-end scenarios such as sportswear, outdoor equipment, and underwear.

[0024] Preferably, the specifications of the polyester hydrophobic inner layer are: fiber is 50D-100D, mesh size is 0.1-2mm, structure is weft-knitted diamond mesh structure, and weight is 60-100g / ㎡.

[0025] The polyester quick-drying outer layer and the polyester hydrophobic inner layer are made of polyester fibers, which can reduce wear and pilling during repeated washing and improve fabric durability. The polyester hydrophobic inner layer is treated with a specific hydrophobic agent to form a stable hydrophobic film layer, improving hydrophobicity and the durability of hydrophobic functions. The polyester quick-drying outer layer is treated with a hydrophilic quick-drying agent to form a stable hydrophilic film layer, improving hydrophilicity and quick-drying properties, maintaining excellent moisture-wicking performance, and avoiding watermarks, pilling, and wear. The polyester hydrophobic inner layer uses fibers with a density of 50D-100D, a mesh size of 0.2-2mm, a weft-knitted diamond mesh structure, and a weight of 60-100g / ㎡, which can better cooperate with the polyester quick-drying outer layer to further optimize the overall performance of the unidirectional moisture-wicking, watermark-free functional mesh fabric to meet the needs of high-end application scenarios.

[0026] Preferably, the processing aids in the hydrophobic treatment agent and the hydrophilic quick-drying treatment agent are one or more of the following: dispersant, wetting agent, defoamer, and thickener.

[0027] Using one or more of the dispersants, wetting agents, defoamers, and thickeners as processing aids for hydrophobic and hydrophilic quick-drying agents can help the components of the hydrophobic agent to fully integrate and form a stable hydrophobic film on the surface of polyester fibers; it can also help the components of the hydrophilic quick-drying agent to fully integrate and form a stable hydrophilic film on the surface of polyester fibers.

[0028] Secondly, a one-way moisture-wicking, watermark-free functional mesh fabric includes the following steps: Step A: Immerse the mesh surface fabric in a hydrophilic quick-drying agent, heat to ≥90℃, keep warm for ≤10min, remove and dry to obtain a polyester quick-drying surface layer, for later use; immerse the mesh middle layer fabric in a hydrophobic agent, heat to ≥90℃, keep warm for ≤10min, remove and dry to obtain a polyester hydrophobic inner layer, for later use; Step B: overlap the polyester quick-drying surface layer and the polyester hydrophobic inner layer, sew them together with sewing thread to form a connecting layer connecting the polyester quick-drying surface layer and the polyester hydrophobic inner layer, shape, and obtain a one-way moisture-wicking, watermark-free functional mesh fabric.

[0029] Treating the mesh outer layer with a hydrophilic quick-drying agent allows the polyester quick-drying outer layer to form a stable hydrophilic film, improving the fabric's hydrophilicity and quick-drying properties. This maintains excellent moisture-wicking performance even after long-term washing, preventing sweat residue and watermarks, and reducing pilling and abrasion. Treating the mesh inner layer with a hydrophobic agent allows the polyester hydrophobic inner layer to form a stable hydrophobic film, improving hydrophobicity and the durability of its hydrophobic function. Sewing the polyester quick-drying outer layer and the polyester hydrophobic inner layer together creates a connecting layer, resulting in a one-way moisture-wicking, watermark-free mesh fabric. This mesh fabric not only possesses excellent one-way moisture wicking and watermark-free effects but also solves the defects of existing fabrics such as moisture wicking degradation, pilling, and abrasion after long-term washing, improving the overall quality of the fabric and meeting the needs of high-end applications.

[0030] Preferably, the polyester outer layer and the polyester inner layer are made of polybutylene terephthalate (PBT) or polyethylene terephthalate (PET).

[0031] The polyester surface layer and polyester inner layer are made of polybutylene terephthalate (PBT) or polyethylene terephthalate (PET). Polyester material itself has the advantage of high strength. Compared with existing polyester irregular cross-section fabrics and natural fiber fabrics, it can effectively reduce the wear and pilling of the fabric during repeated washing, significantly improve the durability of the fabric, and solve the problem of easy wear and tear of existing fabrics from the base material level.

[0032] In summary, this application includes at least one of the following beneficial technical effects: 1. The quick-drying polyester outer layer and the hydrophobic polyester inner layer are made of polyester fiber. With the help of the high strength of polyester material, the fabric’s abrasion resistance and pilling resistance are enhanced at the base material level, improving the fabric’s durability. It is more suitable for multiple washing scenarios than existing polyester profiled cross-section fabrics and natural fiber fabrics. After 50 washes, the abrasion resistance level reaches level 4, which is far higher than the abrasion resistance level of only level 2 of polyester profiled cross-section fiber. 2. The polyester hydrophobic inner layer is treated with a hydrophobic treatment agent made of waterborne polyurethane resin, waterborne polyisocyanate crosslinking agent, hydroxyalkyl silicone wax, diol hydroxyl single-terminated long-chain alkyl silicone oil, and processing aids. The components work synergistically to form a stable hydrophobic film on the surface of the polyester fiber, which significantly enhances hydrophobicity. It can still maintain a high hydrophobicity retention rate after multiple water washes. After 50 water washes, the hydrophobicity retention rate is over 90%, ensuring the durability of the hydrophobic function. 3. The polyester quick-drying top layer is treated with a hydrophilic quick-drying agent composed of waterborne hydroxyl polyurethane dispersion, hydroxyl-terminated hyperbranched polyester, N-(β-aminoethyl)-γ-aminopropyltriethoxysilane, liquid polycaprolactone polyol, poly(methyl vinyl ether-ALT-maleic anhydride), sulfonated nanocellulose, blocked waterborne polyisocyanate, and processing aids. The hydroxyl-terminated hyperbranched polyester, N-(β-aminoethyl)-γ-aminopropyltriethoxysilane, liquid polycaprolactone polyol, poly(methyl vinyl ether-ALT-maleic anhydride), sulfonated nanocellulose, blocked waterborne polyisocyanate, and processing aids are further processed. Both hydroxyl anhydride and sulfonated nanocellulose contain active groups. They interact with each other and further react, crosslink, or mix with waterborne hydroxyl polyurethane dispersions and blocked waterborne polyisocyanates. This allows the hydrophilic quick-drying agent to not only adhere stably to the surface of polyester fibers, but also to have high water absorption and quick-drying properties, significantly improving the fabric's hydrophilicity and quick-drying properties. Even after long-term washing, it can still maintain excellent moisture-wicking properties. After 50 washes, the moisture absorption remains above 93%, avoiding sweat residue and solving the watermark problem, further reducing pilling and wear. 4. The quick-drying polyester surface layer treated with a hydrophilic quick-drying agent, combined with the hydrophobic polyester inner layer prepared in this application, can achieve better moisture-wicking effect and watermark-free characteristics. Detailed Implementation

[0033] The present application will be further described in detail below with reference to the embodiments.

[0034] Introduction to some raw materials: The diol hydroxyl-terminated long-chain alkyl silicone oil is IOTA5866; The hydroxyalkyl silicone wax is Silok® 5181P35; The dispersant is BYK-190; The wetting agent is BYK-348; The defoamer is BYK-024; The hydroxyl-terminated hyperbranched polyester is HyPer H101; Liquid polycaprolactone polyol is polycaprolactone triol with a relative molecular weight of 300-1000. Poly(methyl vinyl ether-ALT-maleic anhydride) CAS No. 136392-67-1; Sulfonated nanocellulose is Yuancheng Chemical's model YC-250210; The aqueous hydroxyl polyurethane dispersion is Bayhydrol® UXP2750; The waterborne polyurethane resin is Bayhydrol U2757; The waterborne polyisocyanate crosslinking agent is Bayhydur® 3100; Blocked waterborne polyisocyanate Manster BT-110; Both the polyester outer and inner layers are made of PBT fabric, with a relative molecular weight of 18,000-25,000 for PBT. Example

[0035] Example 1 A unidirectional moisture-wicking, watermark-free functional mesh fabric is obtained by the following method: Step A: Immerse the mesh fabric completely in the hydrophilic quick-drying agent for 5 minutes. During the immersion process, keep the hydrophilic quick-drying agent flowing at 60 r / min. After taking it out, put it into the drying equipment and heat it to 90℃ for 10 minutes. Then put it into the drying equipment and dry it at 80℃ for 30 minutes to obtain the polyester quick-drying surface layer for later use. The mesh inner layer fabric is completely immersed in the hydrophobic treatment agent for 5 minutes. During the immersion process, the hydrophobic treatment agent is kept flowing at 60 r / min. After being removed, it is placed in a drying equipment and heated to 95℃ for 10 minutes. Then it is placed in a drying equipment and dried at 80℃ for 30 minutes to obtain the polyester hydrophobic inner layer for later use. Step B: Overlap the polyester quick-drying outer layer and the polyester hydrophobic inner layer, and sew them together to form a connecting layer between the polyester quick-drying outer layer and the hydrophobic fiber layer. Note that the sewing thread should not obstruct the mesh during the sewing process. The amount of sewing thread used is 1g / m². 2 The stitching thread is 50D polyester thread, and then it enters the setting device to be set at 100℃ for 30 seconds to obtain a one-way moisture-wicking, watermark-free functional mesh fabric.

[0036] The hydrophobic agent is prepared by the following method: Weigh out the dispersant and mix it with a portion of water (1 / 3 of the total water volume) according to the weight percentage. Then add hydroxyalkyl silicone wax and grind it until the particle size is <5μm to obtain a wax powder pre-dispersion. According to the weight percentage, add the remaining 2 / 3 of water and waterborne polyurethane resin to the reactor, and stir at 100 r / min for 10 min to ensure thorough mixing. Then add liquid polycaprolactone polyol and diol hydroxyl-terminated long-chain alkyl silicone oil and continue stirring for 10 min to ensure thorough mixing. Slowly add the wax powder pre-dispersion while stirring continuously, and add it within 5 min. Add the remaining processing aids (wetting agent and defoamer) and continue stirring for 10 min to ensure thorough mixing. Add triethanolamine to adjust the pH to 7.5. Filter through a 500-mesh filter to obtain the filtrate, which is premixed dispersion A. When using, mix premixed dispersion A with waterborne polyisocyanate crosslinking agent at 120 r / min for 10 min to ensure thorough mixing, and obtain the hydrophobic treatment agent. This hydrophobic treatment agent should be stored at room temperature and used within 4 hours.

[0037] The above raw materials, by weight percentage, include 45% waterborne polyurethane resin, 10% waterborne polyisocyanate crosslinking agent, 10% hydroxyalkyl silicone wax, 8% diol hydroxyl mono-terminated long-chain alkyl silicone oil, 5% processing aids, and water to make up to 100%; the processing aids consist of dispersant, wetting agent, and defoamer in a weight ratio of 3:1:1.

[0038] The hydrophilic quick-drying treatment agent is prepared by the following method: 1) Divide the water into three parts and the processing aids into two parts; weigh the first part of water (6 / 10 of the total water volume) and the first part of processing aids (wetting agent and defoamer) into the reactor, and then slowly add the aqueous polyurethane dispersion at 500 g / min while stirring at 100 r / min. After the addition is complete, stir for 10 min to mix it evenly, then add the hydroxyl-terminated hyperbranched polyester and liquid polycaprolactone polyol, and continue stirring for 20 min to obtain dispersion A; deactivate N-(β-aminoethyl)-γ-aminopropyltriethoxysilane with the second part of water (1 / 10 of the total water volume) to obtain dispersion B; disperse sulfonated nanocellulose in the second part of water (3 / 10 of the total water volume) and the remaining second part of processing aids (dispersant) to form nano suspension C; 2) Add dispersion B to dispersion A and mix evenly. Then slowly add poly(methyl vinyl ether-ALT-maleic anhydride) at 10 g / min. After the addition is complete, continue stirring for 10 min to mix evenly. Then add nano suspension C and continue stirring for 10 min to mix evenly. Add triethanolamine to adjust the pH to 7.8. Filter through a 500 mesh filter to obtain hydrophilic fast-drying solution E. 3) Before hydrophilic treatment, mix hydrophilic quick-drying liquid E with blocked waterborne polyisocyanate at a stirring rate of 100 r / min for 10 min to ensure thorough mixing and obtain hydrophilic quick-drying treatment agent for later use.

[0039] The hydrophilic quick-drying treatment agent contains 50% waterborne hydroxyl polyurethane dispersion, 1% terminal hydroxyl hyperbranched polyester, 2% N-(β-aminoethyl)-γ-aminopropyltriethoxysilane, 7% liquid polycaprolactone polyol, 3% poly(methyl vinyl ether-ALT-maleic anhydride), 1% sulfonated nanocellulose, 8% blocked waterborne polyisocyanate, 0.1% processing aids, and water to make up to 100%. The processing aids consist of dispersant, wetting agent, and defoamer in a weight ratio of 2:1:1.

[0040] The specifications of the polyester quick-drying surface layer are as follows: the fiber is 75D, 24 needles, the mesh size is 0.2mm, the structure is a warp-knitted hexagonal mesh structure, the weight is 100g / ㎡, and the fiber cross-section is circular.

[0041] The specifications of the polyester hydrophobic inner layer are as follows: the fiber is 75D, 24 needles, the mesh size is 0.2mm, the structure is a warp-knitted hexagonal mesh structure, the weight is 100g / ㎡, and the fiber cross-section is circular.

[0042] Example 2

[0043] The difference between Example 2 and Example 1 lies in the raw materials used for the hydrophilic quick-drying agent and the hydrophobic agent, as detailed below: The hydrophilic quick-drying treatment agent contains 40% waterborne hydroxyl polyurethane dispersion, 3.8% hydroxyl-terminated hyperbranched polyester, 4% N-(β-aminoethyl)-γ-aminopropyltriethoxysilane, 5% liquid polycaprolactone polyol, 2% poly(methyl vinyl ether-ALT-maleic anhydride), 2% sulfonated nanocellulose, 6.2% blocked waterborne polyisocyanate, 0.2% processing aids, and water to 100%. The hydrophobic treatment agent comprises, by weight percentage, 50% waterborne polyurethane resin, 8% waterborne polyisocyanate crosslinking agent, 13% hydroxyalkyl silicone wax, 5.5% diol hydroxy mono-terminated long-chain alkyl silicone oil, 3% processing aid, and water to make up to 100%.

[0044] Example 3

[0045] The difference between Example 3 and Example 1 lies in the raw materials used for the hydrophilic quick-drying agent and the hydrophobic agent, as detailed below: The hydrophilic quick-drying treatment agent contains 30% waterborne hydroxyl polyurethane dispersion, 5% hydroxyl-terminated hyperbranched polyester, 5% N-(β-aminoethyl)-γ-aminopropyltriethoxysilane, 3% liquid polycaprolactone polyol, 3% poly(methyl vinyl ether-ALT-maleic anhydride), 2.5% sulfonated nanocellulose, 3% blocked waterborne polyisocyanate, 0.5% processing aids, and water to 100%. The hydrophobic treatment agent comprises, by weight percentage, 55% waterborne polyurethane resin, 5% waterborne polyisocyanate crosslinking agent, 15% hydroxyalkyl silicone wax, 3% diol hydroxyl mono-terminated long-chain alkyl silicone oil, 2% processing aid, and water to make up to 100%.

[0046] Comparative Example

[0047] Comparative Example 1 The difference between Comparative Example 1 and Example 1 is that the polyester hydrophobic inner layer was not treated with a hydrophobic agent.

[0048] Comparative Example 2 The difference between Comparative Example 2 and Example 1 is that the hydroxyalkyl silicone wax in the hydrophobic agent is replaced with waterborne polyurethane resin.

[0049] Comparative Example 3 The difference between Comparative Example 3 and Example 1 is that the diol hydroxyl-terminated long-chain alkyl silicone oil is replaced with a waterborne polyurethane resin.

[0050] Comparative Example 4 The difference between Comparative Example 4 and Example 1 is that hydroxyalkyl silicone wax is replaced with PE wax powder.

[0051] Comparative Example 5 The difference between Comparative Example 5 and Example 1 is that the liquid polycaprolactone polyol was replaced in equal amounts with an aqueous hydroxyl polyurethane dispersion.

[0052] Comparative Example 6 The difference between Comparative Example 6 and Example 1 is that sulfonated nanocellulose was replaced in equal amounts with an aqueous hydroxyl polyurethane dispersion.

[0053] Comparative Example 7 The difference between Comparative Example 7 and Example 1 is that the polyester quick-drying surface layer is a mesh fabric of polyester cross-shaped water-absorbing fibers, and its specifications are the same as those of the mesh fabric in Example 1 of this application.

[0054] Comparative Example 8 The difference between Comparative Example 8 and Example 1 is that the polyester quick-drying surface layer is a mesh fabric containing 30% cotton and 70% PBT fiber, and its specifications are the same as those of the mesh fabric in Example 1 of this application.

[0055] Detection methods / test methods 1. Unidirectional moisture absorption performance The testing was conducted according to GB / T 21655.2-2019 "Evaluation of the moisture absorption and quick-drying properties of textiles - Part 2: Dynamic moisture transfer method" and GB / T 21655.1-2023 "Evaluation of the moisture absorption and quick-drying properties of textiles - Part 1: Unidirectional combination test method". Testing equipment: dynamic moisture transfer tester, electronic balance (accuracy 0.01g), sample holder, pipette; The testing steps are as follows: (1) Cut three 100mm×100mm samples and mark them as surface layer (polyester quick-drying surface layer), inner layer (polyester hydrophobic inner layer) and complete sample (including connecting layer). Each sample should avoid defects such as mesh damage and skipped stitches. (2) Fix the complete sample (single moisture-wicking, watermark-free functional mesh fabric) on the sample holder, ensuring that the hydrophobic inner layer (inner layer) faces up and the quick-drying outer layer (outer layer) faces down, simulating the state of the inner layer adhering to the skin when the human body wears it; (3) Use a pipette to draw 0.2 mL of distilled water (25°C) and slowly add it to the center of the inner layer of the sample to avoid splashing water. (4) Record the area of ​​water transferred from the inner layer to the outer layer at 0 min, 3 min and 6 min respectively (measured with transparent graph paper), and the mass of residual water in the inner layer (weighed with an electronic balance). (5) Calculate the unidirectional transfer index according to GB / T 21655.2-2019 and test the water absorption rate according to GB / T 21655.1-2023; (6) Blank control: Take the same specification mesh fabric (with consistent material and structure) that has not undergone hydrophilic or hydrophobic treatment, and test it simultaneously according to the above steps.

[0056] When the one-way transfer index is ≥200 and the water absorption rate is ≥150%; there is no reverse osmosis: during the test, there is no phenomenon of water flowing back from the outer layer to the inner layer, and it is recorded as qualified for one-way water absorption performance.

[0057] Quick-drying performance Test standards: FZ / T01176-2024 "Determination of drying rate of textile fabrics - hot plate method", ASTM E96 "Textiles - Test method for moisture permeability", GB / T21655.1-2008 "Evaluation of moisture absorption and quick-drying properties of textiles - Part 1: One-way combination test method".

[0058] Testing equipment: hot plate drying rate tester, moisture permeability cup, electronic balance (accuracy 0.01g), constant temperature and humidity chamber, fabric quick-drying tester.

[0059] The testing steps are as follows: (1) Cut three 100mm×100mm polyester quick-drying surface layer samples, avoiding defects; at the same time, cut three mesh fabric surface layers of the same specification that have not undergone hydrophilic quick-drying treatment as blank control samples and equilibrate them in a standard environment for more than 2 hours.

[0060] (2) Hot plate method test: The sample is laid flat on the hot plate drying rate tester, and the temperature of the hot plate is controlled at 37℃ (simulating the temperature of the human body surface). 0.5mL of distilled water is taken with a pipette and evenly added to the sample surface. The instrument is started and the time from the wetted state to the complete drying of the sample is recorded. At the same time, the water evaporation rate at different time points is recorded.

[0061] (3) Moisture permeability test: According to ASTM E96, the inverted cup method is used. The sample is fixed on the moisture permeability cup, desiccant is put into the cup, the initial total mass is recorded, and the sample is placed in a constant temperature and humidity chamber (temperature 22℃, relative humidity 65%). After 24 hours, the sample is taken out, the total mass is weighed, and the moisture permeability is calculated to prove the promoting effect of hydrophilic quick-drying agent on water vapor dissipation.

[0062] The criteria for passing the test are as follows: (1) Hot plate test: 0.5 mL of water is completely dried in ≤15 min, the water evaporation rate is ≥80% within 10 min, and the water evaporation rate is ≥95% within 30 min; (2) Moisture permeability ≥1000g / (m²·24h); When conditions (1) and (2) above are met simultaneously, the fast-drying performance is considered qualified.

[0063] 3. Hydrophobic properties Test basis: Refer to GB / T4745-2012 "Test and evaluation of water resistance of textiles - water immersion method".

[0064] Testing equipment: contact angle measuring instrument, pipette.

[0065] The testing steps are as follows: (1) Cut three 100mm×100mm polyester hydrophobic inner layer samples, avoiding defects; at the same time, cut out the same specification mesh inner layer without hydrophobic treatment as a blank control sample block, and balance it in a standard environment for more than 2 hours.

[0066] (2) Contact angle test: Using a contact angle measuring instrument, the sample is laid flat and fixed. 5 μL of distilled water is drawn up with a pipette and dropped onto the sample surface (inner layer). The image is captured by the optical system and the contact angle between the droplet and the surface is calculated. Three different points are tested for each sample and the average value is taken.

[0067] When the contact angle is ≥100°, the hydrophobicity is considered to be qualified.

[0068] 4. Watermark-free performance Testing standards: Refer to the relevant testing environment requirements of GB / T21655.1-2008.

[0069] Testing equipment: thermostatic and humidistatic chamber, electronic balance (accuracy 0.01 g), standard light source box (D65 light source), pipette, transparent grid paper.

[0070] The specific experimental steps are as follows: (1) Cut 3 complete specimens of 150 mm × 150 mm, avoiding defects; at the same time, cut 3 specimens of the same specification mesh fabric without hydrophilic and hydrophobic treatment as blank control specimens, and balance them in the standard environment for more than 2 hours.

[0071] (2) Use a pipette to suck 1.0 mL of water at 25 °C, and evenly drop it on the central area of the inner layer of the specimen (area about 50 mm × 50 mm) to simulate the human sweating amount. Lay the specimen flat in the thermostatic and humidistatic chamber, keep the standard environment, and dry it naturally to constant weight (the mass difference between two consecutive weighings ≤ 0.01 g).

[0072] (3) After drying, place the specimen under the standard light source box (D65 light source) at a distance of 50 cm, and 3 professional testers use a 10-fold magnifying glass to observe the watermark traces on the inner and outer layers of the specimen, and at the same time measure the watermark area with transparent grid paper (if any).

[0073] (4) Repeat the test 3 times, replace the new specimen after each test, record the watermark situation each time, and take the average value; synchronously conduct the same test on the blank control specimen to compare the watermark differences.

[0074] The passing judgment is as follows: (1) After drying, there are no visible watermark traces on the inner and outer layers of the specimen, and the watermark area is 0; (2) The visual judgments of 3 professional testers are all "no watermark", and there is no objection; After drying the above blank control specimen, obvious water stain traces can be seen, and the watermark area ≥ 200 mm², which proves that the synergistic effect of the two treatment agents can effectively achieve the watermark-free effect, and there is a significant difference from the untreated fabric.

[0075] If all the passing judgments after the above tests are met, it is recorded as qualified for the watermark-free performance.

[0076] When the one-way moisture absorption performance, quick drying performance, hydrophobic performance, and watermark-free performance are all met simultaneously, it is recorded as qualified for the basic performance.

[0077] 5. Water resistance stability Sample specifications: Select the one-way moisture-conducting and watermark-free functional mesh fabric prepared by this technical solution (mesh size 0.1 - 0.5 mm, suitable for the contact angle test range), cut it into specimens of 40 cm × 40 cm, and there are 3 groups of parallel samples in total, ensuring that the samples are flat, without wrinkles, stains and surface defects.

[0078] Sample pretreatment: Before the experiment, all samples were placed in a standard environment (temperature 25℃, relative humidity 55%) for 24 hours for standard drying treatment.

[0079] Experimental reagents: standard detergent (compliant with GB / T3921-2008), deionized water (pH 7), no other additives.

[0080] Experimental conditions and specific procedures: Washing conditions: Simulate a typical household washing scenario. Add 5L of deionized water and 2g of standard detergent for each wash cycle. Wash temperature is 42℃, washing time is 30min, and washing speed is 120r / min. After each wash cycle, rinse 3 times with deionized water (5min each time) to remove detergent residue. Then place in a drying oven and dry at 62℃ until constant weight to complete one water washing cycle.

[0081] Washing times: 50 times.

[0082] Parallel experiment: Five groups of samples were washed simultaneously, and the test data were taken as the average value of the five groups of samples to ensure the reliability and repeatability of the experimental results.

[0083] Testing indicators and pass standards: Moisture wicking performance: The moisture permeability was tested using the above method, and the retention rate was calculated as: Moisture permeability after 50 washes / Moisture permeability before 50 washes × 100%.

[0084] Hydrophobic properties: The contact angle of the polyester hydrophobic inner layer (hydrophobic) was tested using a contact angle meter, and the contact angle retention rate before and after washing was calculated.

[0085] c. Watermark-free performance: After washing, the sample is immersed in deionized water (soaking for 10 minutes), taken out and air-dried naturally. The fabric surface is observed to have no obvious watermark marks. The colorimeter test shows that the sample surface ΔE≤1.0, with no obvious color change or residual marks.

[0086] d. Abrasion and pilling resistance: The polyester quick-drying surface layer and polyester hydrophobic inner layer are tested according to GB / T4802.2-2008. The Martindale method is used, with a pressure of 12 kPa and a friction of 5000 revolutions. The grade system is as follows (Grade 1 is the worst and Grade 5 is the best). For example, if the surface layer is Grade 4 and the inner layer is Grade 3, it is represented as Grade 4 and Grade 3, respectively.

[0087] Regarding the data statistics rules in a, b, and c, each experiment in this application has a total of 5 samples. For example, in a, the retention rate of Example 1 is ≥93%, indicating that among the 5 samples, the smallest retention rate is 93%, and the remaining samples have retention rates greater than 93% but less than 100%. Similarly, in b, regarding the hydrophobic retention rate, the hydrophobic retention rate of Comparative Example 2 is <75%, indicating that among the 5 samples, the largest hydrophobic retention rate is also less than 75%, such as 74.8%.

[0088] The specific experimental data are shown in Table 1. Table 1. Experimental data of Examples 1-3 and Comparative Examples 1-8

[0089] As can be seen from Example 1 and Comparative Examples 1-8, the overall performance of Comparative Examples 1-8 is worse than that of Example 1, especially the performance after 50 washes. This indicates that both the polyester quick-drying outer layer and the polyester hydrophobic inner layer of this application are made of polyester fiber to give the fabric basic durability. Based on this, the polyester hydrophobic inner layer is treated with a specific hydrophobic treatment agent (waterborne polyurethane resin, waterborne polyisocyanate crosslinking agent, hydroxyalkyl silicone wax, diol hydroxyl-terminated long-chain alkyl silicone oil, and processing aids). The components work synergistically to form a stable hydrophobic film on the surface of the polyester fiber, improving hydrophobicity and ensuring the durability of the hydrophobic function. The polyester quick-drying outer layer is treated with a hydrophilic quick-drying treatment agent, in which the terminal hydroxyl hyperbranched polyester, N-(β-aminoethyl)-γ-aminopropyltriethoxysilane, liquid polycaprolactone polyol, poly(methyl vinyl ether-ALT-maleic anhydride), and sulfonated nanocellulose all contain active groups. They interact with each other and further react, crosslink, or blend with the waterborne hydroxyl polyurethane dispersion and the blocked waterborne polyisocyanate, so that the hydrophilic quick-drying treatment agent can stably adhere to the surface of the polyester fiber, forming a stable water-absorbing layer with high water absorption and quick-drying characteristics. It is not easy to fall off after multiple washes, and the water absorption performance retention rate is better.

[0090] This hydrophilic quick-drying agent, combined with the hydrophobic inner layer of polyester prepared in this application, achieves superior moisture-wicking properties and watermark-free characteristics. Furthermore, after 50 washes, the fabric retains over 93% moisture absorption and over 90% hydrophobicity, achieving an abrasion resistance rating of 4, far exceeding the 2-level abrasion resistance rating of polyester profiled fibers. This effectively solves the defects of existing fabrics, such as moisture wicking degradation and pilling / wear after long-term washing, significantly improving the overall quality of the fabric.

[0091] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A one-way moisture-wicking, watermark-free functional mesh fabric, characterized in that, It includes a polyester quick-drying top layer, a polyester hydrophobic inner layer, and a connecting layer for connecting the polyester quick-drying top layer and the polyester hydrophobic inner layer; The polyester hydrophobic inner layer is obtained by hydrophobic treatment with a hydrophobic agent; the hydrophobic treatment agent includes: waterborne polyurethane resin, waterborne polyisocyanate crosslinking agent, hydroxyalkyl silicone wax, diol hydroxyl-terminated long-chain alkyl silicone oil, and processing aids. The polyester quick-drying surface layer is obtained by hydrophilic treatment with a hydrophilic quick-drying agent, which includes: waterborne hydroxyl polyurethane dispersion, hydroxyl-terminated hyperbranched polyester, N-(β-aminoethyl)-γ-aminopropyltriethoxysilane, liquid polycaprolactone polyol, poly(methyl vinyl ether-ALT-maleic anhydride), sulfonated nanocellulose, blocked waterborne polyisocyanate, and processing aids.

2. The unidirectional moisture-wicking, watermark-free functional mesh fabric according to claim 1, characterized in that: The hydrophobic treatment agent comprises, by weight percentage, 45-55% waterborne polyurethane resin, 5-10% waterborne polyisocyanate crosslinking agent, 10-15% hydroxyalkyl silicone wax, 3-8% diol hydroxyl mono-terminated long-chain alkyl silicone oil, 2-5% processing aids, and water to make up to 100%.

3. The unidirectional moisture-wicking, watermark-free functional mesh fabric according to claim 2, characterized in that: The hydrophobic agent is prepared by the following method: Weigh out a portion of the processing aid and a portion of water according to the weight percentage, mix them evenly, then add hydroxyalkyl silicone wax and grind until the particle size is <5μm to obtain a wax powder pre-dispersion liquid; Add the remaining water and waterborne polyurethane resin to the reactor according to the weight percentage, stir evenly, add liquid polycaprolactone polyol and diol hydroxyl-terminated long-chain alkyl silicone oil and stir evenly, slowly add wax powder pre-dispersion while stirring, add the remaining processing aids and mix evenly, then adjust the pH to 7.5-8, filter, and obtain A premixed dispersion. When using, mix A premixed dispersion with waterborne polyisocyanate crosslinking agent evenly to obtain hydrophobic treatment agent.

4. The unidirectional moisture-wicking, watermark-free functional mesh fabric according to claim 1, characterized in that: The hydrophilic quick-drying treatment agent, by weight percentage, comprises 30-50% aqueous hydroxyl polyurethane dispersion, 1-5% hydroxyl-terminated hyperbranched polyester, 2-5% N-(β-aminoethyl)-γ-aminopropyltriethoxysilane, 3-7% liquid polycaprolactone polyol, 1-3% poly(methyl vinyl ether-ALT-maleic anhydride), 1-2.5% sulfonated nanocellulose, 5-8% blocked aqueous polyisocyanate, 0.1-0.5% processing aids, and water to 100%.

5. The unidirectional moisture-wicking, watermark-free functional mesh fabric according to claim 4, characterized in that, The hydrophilic quick-drying treatment agent is prepared by the following method: 1) Divide the water into three parts and the processing aid into two parts; weigh the first part of water and the first part of processing aid and mix them together. Slowly add the aqueous polyurethane dispersion while stirring, and stir until uniform. Then add the hydroxyl-terminated hyperbranched polyester and liquid polycaprolactone polyol, and stir until uniform to obtain dispersion A; activate N-(β-aminoethyl)-γ-aminopropyltriethoxysilane with the second part of hydrolysis to obtain dispersion B; disperse sulfonated nanocellulose in the third part of water and the second part of processing aid to form nano suspension C. 2) Add dispersion B to dispersion A and mix evenly. Then slowly add poly(methyl vinyl ether-ALT-maleic anhydride), mix evenly, then add nano suspension C, mix evenly, adjust pH to ≤7, filter, and obtain hydrophilic fast-drying solution E. 3) Before hydrophilic treatment, mix hydrophilic quick-drying liquid E with blocked waterborne polyisocyanate to obtain hydrophilic quick-drying treatment agent.

6. The unidirectional moisture-wicking, watermark-free functional mesh fabric according to claim 1, characterized in that: The specifications of the polyester quick-drying surface layer are: fiber is 75D-150D, mesh size is 0.1-2mm, structure is warp-knitted hexagonal mesh structure, and weight is 80-120g / ㎡.

7. The unidirectional moisture-wicking, watermark-free functional mesh fabric according to claim 1, characterized in that: The specifications of the polyester hydrophobic inner layer are as follows: the fiber is 50D-100D, the mesh size is 0.1-2mm, the structure is a weft-knitted diamond mesh structure, and the weight is 60-100g / ㎡.

8. The unidirectional moisture-wicking, watermark-free functional mesh fabric according to claim 1, characterized in that: The processing aids in the hydrophobic treatment agent and the hydrophilic quick-drying treatment agent are one or more of the following: dispersant, wetting agent, defoamer, and thickener.

9. A unidirectional moisture-wicking, watermark-free functional mesh fabric according to any one of claims 1-8, characterized in that, Includes the following steps: Step A: Immerse the mesh fabric in a hydrophilic quick-drying agent, heat to ≥90℃, keep warm for ≤10 minutes, remove and dry to obtain a polyester quick-drying surface layer for later use; The mesh upper layer fabric is immersed in a hydrophobic treatment agent, heated to ≥90℃, and kept warm for ≤10 minutes. It is then removed and dried to obtain the polyester hydrophobic inner layer for later use. Step B: Overlap the quick-drying polyester outer layer and the hydrophobic polyester inner layer, and sew them together with sewing thread to form a connecting layer that links the quick-drying polyester outer layer and the hydrophobic fiber layer. Set the shape to obtain a one-way moisture-wicking, watermark-free functional mesh fabric.

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