A bio-based moisture-wicking quick-drying fabric and a preparation process thereof

Abstract

The application provides a kind of bio-based moisture absorption and quick-drying fabric and its preparation process, belongs to the technical field of textile functional fabric;The fabric is composed of three layers of surface layer, middle layer and bottom layer, wherein the surface layer is composed of hydrophilic modified bio-based PA56 profiled fiber and spandex blended yarn;The middle layer is composed of bio-based viscose fiber and ordinary bio-based PA56 fiber blended yarn;The bottom layer is composed of fine denier bio-based PA56 fiber and cotton fiber blended yarn;Its preparation process includes: first, hydrophilic modification treatment of bio-based PA56 profiled fiber by padding and baking, then integrated knitting with other yarns by double-sided large circular knitting machine, finally, two-dip-two-pad finishing of the fabric with bio-based moisture absorption and quick-drying finishing liquid.The application effectively solves the problem of easy loss of hydrophilic components and poor moisture absorption and quick-drying durability in the prior art through fiber-level hydrophilic modification and post-finishing double hydrophilization technology, and the obtained fabric has excellent water directional migration ability and washing resistance.

Description

Technical Field

[0001] This invention relates to the field of textile functional fabric technology, specifically to a bio-based moisture-wicking and quick-drying fabric and its preparation process. Background Technology

[0002] Moisture-wicking and quick-drying fabrics are functional textiles that can absorb and wick away human sweat, keeping skin dry. They are widely used in sportswear, outdoor gear, and underwear. Currently, there are three main technical approaches to impart moisture-wicking and quick-drying properties to fabrics: first, using irregularly shaped fibers to achieve physical moisture wicking through capillary action generated by longitudinal grooves on the fiber surface; second, chemically modifying the fabric through hydrophilic finishing, introducing hydrophilic groups on the fiber surface to improve wettability; and third, optimizing the fabric's structure to create porous channels that facilitate moisture conduction. Among these, hydrophilic finishing is the most widely used technique due to its simple process and low cost. Bio-based PA56 fibers, due to the presence of more free amide bonds in their molecular chains, have intrinsically superior moisture absorption compared to conventional polyester and nylon, and have gained attention in the field of moisture-wicking and quick-drying fabrics in recent years.

[0003] However, existing hydrophilic finishing technologies suffer from significant durability issues. Conventional finishing processes typically occur after fabric weaving, applying hydrophilic agents to the fabric surface via padding followed by drying or baking. In this method, the hydrophilic agent molecules primarily adhere to the fiber surface through weak interactions such as van der Waals forces or hydrogen bonds, lacking stable chemical bonds with the fiber matrix. During actual wear and repeated washing, the hydrophilic components adhering to the fiber surface continuously detach and are lost under mechanical friction and water shearing, causing the fabric's moisture-wicking and quick-drying properties to significantly decrease with each wash. This is especially true for synthetic fibers with smooth surfaces and limited active groups; a single application of hydrophilic agents during the finishing stage is insufficient to achieve a strong bond with the fiber, resulting in severely inadequate durability of the hydrophilic layer and becoming a core technological bottleneck restricting the lifespan of moisture-wicking and quick-drying fabrics. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a bio-based moisture-wicking and quick-drying fabric and its preparation process, so as to solve the problems in the prior art where hydrophilic components only adhere to the fiber surface, are quickly lost after multiple washes, and have poor durability of moisture-wicking and quick-drying performance.

[0005] This invention is implemented as follows: A bio-based moisture-wicking and quick-drying fabric is composed of a three-layer composite structure: a top layer, a middle layer, and a bottom layer. The top layer is made of a blend of hydrophilically modified bio-based PA56 profiled fiber and spandex fiber. The middle layer is made of a blend of bio-based viscose fiber and ordinary bio-based PA56 fiber. The bottom layer is made of a blend of fine denier bio-based PA56 fiber and cotton fiber. The top layer, middle layer, and bottom layer are integrally formed by a knitting process.

[0006] By adopting the above technical solution, the fabric is designed as a three-layer structure consisting of a top layer, a middle layer, and a bottom layer, and each layer is made of a blend of fibers with different hydrophilic and hydrophobic properties. Therefore, a gradient wetting effect is achieved, in which moisture can migrate directionally from the bottom layer to the top layer, resulting in a dry and comfortable wearing experience against the skin.

[0007] Furthermore, the cross-section of the bio-based PA56 shaped fiber is at least one of cross-shaped, Y-shaped, H-shaped or hollow cross-shaped, the cross-section irregularity of the fiber is ≥25%, and the single filament fineness is 1.0 to 5.0 dtex; when a hollow cross-shaped cross-section is used, the hollowness is 18% to 22%, and the fiber surface has 4 longitudinal grooves with a depth of 0.05 to 0.08 mm evenly distributed.

[0008] By adopting the above technical solution, the bio-based PA56 fiber used in the surface layer is designed with an irregular cross-section and hollow structure, which increases the specific surface area of ​​the fiber and forms capillary grooves extending along the axial direction on the fiber surface. Therefore, the wicking and conduction efficiency of liquid water along the fiber surface is improved, and the rapid diffusion of water from the inner layer to the outer layer is promoted.

[0009] Furthermore, the amounts of each fiber component in the fabric, by weight, are as follows: In the surface layer, 92-95 parts by weight of hydrophilically modified bio-based PA56 profiled fibers and 5-8 parts by weight of spandex fibers are present; in the middle layer, 40-50 parts by weight of bio-based viscose fibers and 50-60 parts by weight of ordinary bio-based PA56 fibers are present; in the bottom layer, 60-70 parts by weight of fine denier bio-based PA56 fibers and 30-40 parts by weight of cotton fibers are present.

[0010] By adopting the above technical solution, a gradient structure is formed by using a specific ratio of fiber blends in each layer, which gives the surface layer appropriate elasticity and moisture wicking, the middle layer good hydrophilicity and water retention, and the bottom layer both skin-friendly and absorbent. This creates a gradient structure with progressively enhanced moisture conduction capacity from the bottom layer to the surface layer, which is conducive to the directional migration of moisture.

[0011] Furthermore, the knitted integral molding structure is as follows: the surface layer adopts a plain weave, the middle layer adopts a tuck weave, and the bottom layer adopts a loop weave.

[0012] By adopting the above technical solution, since the surface layer uses a tight plain weave, the middle layer uses a tucked weave with a concave-convex structure, and the bottom layer uses a terry weave with a fluffy structure, a pore gradient from dense to sparse is formed inside the fabric, which further enhances the directional conduction of moisture and improves the overall moisture wicking efficiency of the fabric.

[0013] Furthermore, the total thickness of the three-layer structure of the fabric is 0.5 to 1.2 mm, of which the thickness of the surface layer accounts for 20% to 30%, the thickness of the middle layer accounts for 40% to 50%, and the thickness of the bottom layer accounts for 20% to 30%.

[0014] By adopting the above technical solution, the thickness ratio of each layer has been optimized, so that the middle layer has a relatively large thickness ratio to fully exert the function of water storage and transfer, while the surface layer is kept thin to facilitate the rapid evaporation of moisture. Therefore, the overall moisture absorption, water storage and quick-drying functions of the fabric are coordinated and unified.

[0015] Furthermore, the preparation process of the aforementioned bio-based moisture-wicking and quick-drying fabric includes the following steps: S1, Preparation of bio-based PA56 chips: Under nitrogen protection, bio-based 1,5-pentanediamine and adipic acid were neutralized to obtain PA56 salt solution. After purification, the solution was concentrated, prepolymerized and finalized, then extruded, water-cooled and pelletized to obtain bio-based PA56 chips. S2, Preparation of bio-based PA56 profiled fiber: The bio-based PA56 chips obtained in step S1 are dried and melt-spun, extruded through a spinneret with profiled spinneret holes, and then cooled, oiled, stretched and wound to obtain bio-based PA56 profiled fiber. S3, Fiber hydrophilic modification treatment: The bio-based PA56 profiled fiber obtained in step S2 is impregnated in a hydrophilic modification treatment solution, and hydrophilic modification treatment is carried out by padding and baking processes. S4, Yarn preparation: The surface material, intermediate material and bottom material are mixed separately and spun using Siro spinning process to obtain surface yarn, intermediate yarn and bottom yarn; S5, Knitting: Using a double-sided circular knitting machine, the surface yarn, middle layer yarn and bottom layer yarn are knitted together according to the preset structure to obtain the greige fabric; S6, Pretreatment: The grey fabric is subjected to desizing, simmering and bleaching in sequence; S7, Bio-based functional finishing: The pre-treated fabric is immersed in a bio-based moisture-absorbing and quick-drying finishing solution and finished using a two-dip and two-roll process. S8, Post-processing: The finished fabric is pre-dried, baked and shaped to obtain the finished bio-based moisture-wicking and quick-drying fabric.

[0016] Furthermore, in step S1, the molar ratio of bio-based 1,5-pentanediamine to adipic acid in the neutralization reaction is 1:1 to 1:1.05; The purified PA56 salt solution has a concentration of 50%–65% and a pH value of 7–9. The prepolymerization reaction temperature is 190℃~230℃, the reaction pressure is 1.0MPa~2.5MPa, and the reaction time is 1~3 hours; the final polymerization reaction temperature is 260℃~275℃, and the final polymerization time is 1~2 hours.

[0017] Furthermore, in step S2, the drying process of the bio-based PA56 slices is carried out in a vacuum drum dryer at a temperature of 90°C to 120°C for 12 to 24 hours, and the moisture content of the slices is reduced to below 200 ppm after drying. The melt spinning temperature is 260℃~280℃; the stretching ratio is 2.5~4.0 times, and the stretching temperature is 150℃~180℃.

[0018] Further, in step S3, the hydrophilic modification treatment liquid is composed of the following components in parts by weight: 5-15 parts hydrophilic modifier, 1-5 parts crosslinking agent, 0.1-1 parts catalyst, and 79-93.9 parts deionized water; The hydrophilic modifier is selected from at least one of polyethylene glycol, polyether-modified amino silicone oil, and hydrophilic polyurethane; The crosslinking agent is selected from at least one of citric acid, butanetetracarboxylic acid, and capped isocyanate; In the aforementioned impregnation and baking process, the impregnation temperature is 25℃~50℃, the roll residue rate is 70%~80%, the baking temperature is 130℃~170℃, and the baking time is 1~5 minutes.

[0019] By adopting the above technical solution, the treatment liquid containing hydrophilic modifier and crosslinking agent is uniformly applied to the surface of PA56 profiled fiber through padding and baking processes, and the crosslinking reaction is fully carried out through appropriate baking temperature and time. Therefore, a firm hydrophilic film layer is formed on the fiber surface, which gives the fiber a lasting and stable hydrophilic modification effect and improves the wettability of the fiber surface.

[0020] Furthermore, in step S5, the machine number of the double-sided circular knitting machine is 28G to 32G, and the rotation speed is 22 to 26 rpm; In step S7, the bio-based moisture-absorbing and quick-drying finishing solution is composed of the following components in parts by weight: 2-4 parts chitosan quaternary ammonium salt, 1-3 parts silk fibroin hydrolysate, 0.5-1.5 parts citric acid, 0.1-0.3 parts penetrant JFC, 91.2-96.4 parts deionized water, and the roll residue of the two-dip and two-roll process is 70%-80%. By adopting the above technical solution, the fabric is functionally treated with a bio-based finishing liquid containing chitosan quaternary ammonium salt and silk fibroin hydrolysate. Chitosan quaternary ammonium salt has excellent hydrophilicity and antibacterial properties, while silk fibroin hydrolysate has excellent skin-friendly and moisturizing properties. Therefore, while further improving the fabric's moisture absorption and quick-drying performance, the fabric is also endowed with skin-friendly comfort and antibacterial functional properties.

[0021] In step S8, the pre-drying temperature is 80℃~90℃, the pre-drying time is 3~5 minutes, the baking temperature is 120℃~130℃, the baking time is 2~3 minutes, the shaping temperature is 140℃~145℃, the shaping time is 30~45 seconds, and the overfeed rate is 3%~5%.

[0022] By adopting the above technical solution, the step-by-step heat treatment method of low-temperature pre-drying followed by high-temperature baking, combined with appropriate setting temperature and overfeed rate, allows the finishing agent to fully cross-link and cure, while eliminating internal stress in the fabric, resulting in a finished fabric with stable dimensions and good hand feel.

[0023] The present invention has the following advantages: 1. This invention employs a dual hydrophilication synergistic technology solution, combining hydrophilic modification treatment at the fiber stage with bio-based functional finishing in the post-processing stage. Specifically, bio-based PA56 profiled fibers are first subjected to padding and baking for hydrophilic modification, followed by padding of the finished fabric with a bio-based moisture-wicking and quick-drying finishing solution. This achieves durable hydrophilic modification and significantly improved wash resistance. Compared to existing technologies that only perform a one-time hydrophilic finishing in the fabric finishing stage, this invention solves the problems of hydrophilic components merely adhering to the fiber surface, rapid loss after multiple washes, and poor durability of moisture-wicking and quick-drying properties.

[0024] 2. This invention employs a synergistic technical solution combining three-layer differentiated yarn preparation with double-sided circular knitting to create a three-layer gradient structure. Specifically, the outer layer uses a plain weave combined with hydrophilic modified profiled fibers for moisture wicking; the middle layer uses a tuck weave combined with viscose blended yarn for water storage; and the bottom layer uses a terry weave combined with cotton blended yarn for water absorption. This achieves the technical effect of directional moisture migration from the inside out, resulting in a long-lasting dry feel against the skin. Compared to existing technologies that use single-fiber single-layer weaving or simple multi-layer lamination, this invention solves the problems of failing to create a directional moisture conduction gradient, resulting in damp and sticky surfaces against the skin after moisture absorption, and poor wearing comfort.

[0025] 3. This invention employs a synergistic technical solution combining the irregular cross-section design of bio-based PA56 irregularly shaped fibers with hydrophilic modification at the fiber stage. Specifically, irregularly shaped cross-section fibers with longitudinal grooves and capillary microchannels are spun through irregularly shaped spinnerets, followed by chemical hydrophilic modification to introduce hydrophilic groups onto the fiber surface. This achieves a synergistic effect of both physical and chemical hydrophilic mechanisms, significantly improving the wicking efficiency of liquid water. Compared to existing technologies that use conventional circular cross-section fibers or rely solely on single hydrophilic modification, this invention solves the problems of the lack of capillary water-conducting channels on the fiber surface, the passive diffusion of moisture only through inter-fiber pores, and the limited moisture conduction rate. Attached Figure Description

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] Figure 1 This is a schematic diagram of the steps involved in the preparation of a bio-based moisture-wicking and quick-drying fabric according to the present invention. Detailed Implementation

[0028] The following will be combined with the appendix Figure 1 The technical solution of the present invention will be clearly and completely described in detail with specific embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Where specific conditions are not specified in the embodiments, conventional conditions or conditions recommended by the manufacturer shall apply. Reagents or instruments used, unless otherwise specified, are all commercially available conventional products.

[0029] I. Product Preparation Example 1

[0030] A process for preparing a bio-based moisture-wicking and quick-drying fabric includes the following steps: S1, Preparation of Bio-based PA56 Chips: Under nitrogen protection, bio-based 1,5-pentanediamine and adipic acid were neutralized at a molar ratio of 1:1 to obtain a PA56 salt solution. After purification, the solution was concentrated to 80%. Then, a prepolymerization reaction was carried out at a temperature of 190℃, a pressure of 1.0MPa, and a reaction time of 1 hour. After prepolymerization, the pressure was released to atmospheric pressure, and the temperature was raised to 260℃ for a final polymerization reaction for 1 hour. The resulting bio-based PA56 chips were obtained by extrusion, water cooling, and pelletizing. S2, Preparation of bio-based PA56 profiled fibers: The bio-based PA56 chips obtained in step S1 were dried and then melt-spun. The drying process was carried out in a vacuum drum dryer at a temperature of 90°C for 12 hours, resulting in a chip moisture content of less than 200 ppm. The melt-spinning temperature was 260°C. The fibers were extruded through a spinneret with cross-shaped spinnerets, cooled, oiled, stretched, and wound to obtain bio-based PA56 profiled fibers. The stretching ratio was 2.5 times, and the stretching temperature was 150°C. The resulting bio-based PA56 profiled fibers had a cross-shaped cross section, a single filament fineness of 1.0 dtex, and a cross-sectional anisotropy of 25%. S3, Fiber hydrophilic modification treatment: The bio-based PA56 profiled fiber obtained in step S2 is impregnated in a hydrophilic modification treatment solution, and hydrophilic modification treatment is carried out by padding and baking processes; the hydrophilic modification treatment solution is composed of the following components by weight: 5 parts polyethylene glycol, 1 part citric acid, 0.1 parts catalyst, and 93.9 parts deionized water; the impregnation temperature is 25℃, the padding rate is 70%; the baking temperature is 130℃, and the baking time is 1 minute; S4, Yarn preparation: 92 parts by weight of bio-based PA56 profiled fiber treated in step S3 are mixed with 8 parts by weight of spandex fiber and spun using Siro spinning process to obtain the surface yarn; 40 parts by weight of bio-based viscose fiber are mixed with 60 parts by weight of ordinary bio-based PA56 fiber and spun using Siro spinning process to obtain the middle layer yarn; 60 parts by weight of fine denier bio-based PA56 fiber are mixed with 40 parts by weight of cotton fiber and spun using Siro spinning process to obtain the bottom layer yarn. S5, Knitting: A double-sided circular knitting machine, size 28G, speed 22rpm, is used to knit the top layer yarn, middle layer yarn, and bottom layer yarn together according to the preset structure to obtain the greige fabric. The structure is as follows: the top layer uses a plain weave, the middle layer uses a tuck weave, and the bottom layer uses a loop weave. The total thickness of the three layers of the resulting greige fabric is 0.5mm, of which the top layer accounts for 20%, the middle layer accounts for 50%, and the bottom layer accounts for 30%. S6, Pretreatment: The grey fabric is subjected to desizing, simmering and bleaching in sequence; S7, Bio-based Functional Finishing: The pretreated fabric is immersed in a bio-based moisture-wicking and quick-drying finishing solution, and finished using a two-dip, two-ply process; the bio-based moisture-wicking and quick-drying finishing solution consists of the following components by weight: 2 parts chitosan quaternary ammonium salt, 1 part silk fibroin hydrolysate, 0.5 parts citric acid, 0.1 parts penetrant JFC, and 96.4 parts deionized water; the pick-up rate is 70%; S8, Post-processing: The finished fabric is pre-dried, baked and set; the pre-drying temperature is 80℃ and the pre-drying time is 3 minutes; the baking temperature is 120℃ and the baking time is 2 minutes; the setting temperature is 140℃ and the setting time is 30 seconds, with an overfeed rate of 3%; the finished bio-based moisture-wicking and quick-drying fabric is obtained. Example 2

[0031] A process for preparing a bio-based moisture-wicking and quick-drying fabric includes the following steps: S1, Preparation of Bio-based PA56 Chips: Under nitrogen protection, bio-based 1,5-pentanediamine and adipic acid were neutralized at a molar ratio of 1:1.02 to obtain a PA56 salt solution. After purification, the solution was concentrated to 85%. Then, a prepolymerization reaction was carried out at a temperature of 210℃, a pressure of 1.5MPa, and a reaction time of 2 hours. After prepolymerization, the pressure was released to atmospheric pressure, and the temperature was raised to 268℃ for a final polymerization reaction, which lasted for 1.5 hours. The resulting bio-based PA56 chips were obtained by extrusion, water cooling, and pelleting. S2, Preparation of bio-based PA56 profiled fibers: The bio-based PA56 chips obtained in step S1 were dried and then melt-spun. The drying process was carried out in a vacuum drum dryer at a temperature of 105°C for 18 hours, resulting in a chip moisture content of less than 150 ppm. The melt spinning temperature was 270°C. The fibers were extruded through a spinneret with hollow cross-shaped spinnerets, cooled, oiled, stretched, and wound to obtain bio-based PA56 profiled fibers. The stretching ratio was 3.2 times, and the stretching temperature was 165°C. The resulting bio-based PA56 profiled fibers had a hollow cross-shaped cross section, a single filament fineness of 2.5 dtex, a cross-sectional irregularity of 30%, a hollowness of 20%, and four longitudinal grooves with a depth of 0.06 mm were evenly distributed on the fiber surface. S3, Fiber hydrophilic modification treatment: The bio-based PA56 profiled fiber obtained in step S2 is impregnated in a hydrophilic modification treatment solution, and hydrophilic modification treatment is carried out by padding and baking processes; the hydrophilic modification treatment solution is composed of the following components in parts by weight: 10 parts of polyether modified amino silicone oil, 3 parts of butanetetracarboxylic acid, 0.5 parts of catalyst, and 86.5 parts of deionized water; the impregnation temperature is 35℃, the padding rate is 75%; the baking temperature is 150℃, and the baking time is 3 minutes; S4, Yarn preparation: 94 parts by weight of bio-based PA56 profiled fiber treated in step S3 are mixed with 6 parts by weight of spandex fiber and spun into surface yarn using Siro spinning process; 45 parts by weight of bio-based viscose fiber are mixed with 55 parts by weight of ordinary bio-based PA56 fiber and spun into intermediate yarn using Siro spinning process; 65 parts by weight of fine denier bio-based PA56 fiber are mixed with 35 parts by weight of cotton fiber and spun into bottom yarn using Siro spinning process. S5, Knitting: A double-sided circular knitting machine, size 30G, speed 24rpm, is used to knit the top layer yarn, middle layer yarn, and bottom layer yarn together according to the preset structure to obtain the greige fabric; the structure is: plain weave for the top layer, tuck weave for the middle layer, and loop weave for the bottom layer; the total thickness of the three layers of the resulting greige fabric is 0.8mm, of which the top layer accounts for 25%, the middle layer accounts for 45%, and the bottom layer accounts for 30%; S6, Pretreatment: The grey fabric is subjected to desizing, simmering and bleaching in sequence; S7, Bio-based Functional Finishing: The pretreated fabric is immersed in a bio-based moisture-wicking and quick-drying finishing solution, and finished using a two-dip, two-nip process; the bio-based moisture-wicking and quick-drying finishing solution consists of the following components by weight: 3 parts chitosan quaternary ammonium salt, 2 parts silk fibroin hydrolysate, 1 part citric acid, 0.2 parts penetrant JFC, and 93.8 parts deionized water; the nip-off rate is 75%; S8, Post-processing: The finished fabric is pre-dried, baked and set; the pre-drying temperature is 85℃ and the pre-drying time is 4 minutes; the baking temperature is 125℃ and the baking time is 2.5 minutes; the setting temperature is 142℃ and the setting time is 38 seconds, with an overfeed rate of 4%; the finished bio-based moisture-wicking and quick-drying fabric is obtained. Example 3

[0032] A process for preparing a bio-based moisture-wicking and quick-drying fabric includes the following steps: S1, Preparation of Bio-based PA56 Slices: Under nitrogen protection, bio-based 1,5-pentanediamine and adipic acid were neutralized at a molar ratio of 1:1.05 to obtain a PA56 salt solution. After purification, the solution was concentrated to 90%. Then, a prepolymerization reaction was carried out at a temperature of 230℃, a pressure of 2.5MPa, and a reaction time of 3 hours. After prepolymerization, the pressure was released to atmospheric pressure, and the temperature was raised to 275℃ for a final polymerization reaction for 2 hours. The resulting bio-based PA56 slices were obtained by extrusion, water cooling, and pelleting. S2, Preparation of bio-based PA56 profiled fibers: The bio-based PA56 chips obtained in step S1 were dried and then melt-spun. The drying process was carried out in a vacuum drum dryer at a temperature of 120°C for 24 hours, until the moisture content of the chips was reduced to below 100 ppm. The melt spinning temperature was 280°C. The fibers were extruded through a spinneret with H-shaped spinneret holes, cooled, oiled, stretched, and wound to obtain bio-based PA56 profiled fibers. The stretching ratio was 4.0 times, and the stretching temperature was 180°C. The resulting bio-based PA56 profiled fibers had an H-shaped cross-section, a single filament fineness of 5.0 dtex, and a cross-sectional anisotropy of 35%. S3, Fiber hydrophilic modification treatment: The bio-based PA56 profiled fiber obtained in step S2 is impregnated in a hydrophilic modification treatment solution, and hydrophilic modification treatment is carried out by padding and baking processes; the hydrophilic modification treatment solution is composed of the following components by weight: 15 parts hydrophilic polyurethane, 5 parts end-capped isocyanate, 1 part catalyst, and 79 parts deionized water; the impregnation temperature is 50℃, the padding rate is 80%; the baking temperature is 170℃, and the baking time is 5 minutes. S4, Yarn preparation: 95 parts by weight of bio-based PA56 profiled fiber treated in step S3 are mixed with 5 parts by weight of spandex fiber and spun using Siro spinning process to obtain the surface yarn; 50 parts by weight of bio-based viscose fiber are mixed with 50 parts by weight of ordinary bio-based PA56 fiber and spun using Siro spinning process to obtain the middle layer yarn; 70 parts by weight of fine denier bio-based PA56 fiber are mixed with 30 parts by weight of cotton fiber and spun using Siro spinning process to obtain the bottom layer yarn. S5, Knitting: A double-sided circular knitting machine, size 32G, speed 26 rpm, is used to knit the top layer yarn, middle layer yarn, and bottom layer yarn together according to the preset structure to obtain the greige fabric. The structure is as follows: the top layer uses a plain weave, the middle layer uses a tuck weave, and the bottom layer uses a loop weave. The total thickness of the three layers of the resulting greige fabric is 1.2 mm, of which the top layer accounts for 30%, the middle layer accounts for 40%, and the bottom layer accounts for 30%. S6, Pretreatment: The grey fabric is subjected to desizing, simmering and bleaching in sequence; S7, Bio-based Functional Finishing: The pretreated fabric is immersed in a bio-based moisture-wicking and quick-drying finishing solution, and finished using a two-dip, two-ply process; the bio-based moisture-wicking and quick-drying finishing solution consists of the following components by weight: 4 parts chitosan quaternary ammonium salt, 3 parts silk fibroin hydrolysate, 1.5 parts citric acid, 0.3 parts penetrant JFC, and 91.2 parts deionized water; the pick-up rate is 80%; S8, Post-processing: The finished fabric is pre-dried, baked and set; the pre-drying temperature is 90℃ and the pre-drying time is 5 minutes; the baking temperature is 130℃ and the baking time is 3 minutes; the setting temperature is 145℃ and the setting time is 45 seconds, with an overfeed rate of 5%; the finished bio-based moisture-wicking and quick-drying fabric is obtained.

[0033] Comparative Example 1: Unlike Example 2, this comparative example uses a single-sided circular knitting machine to weave a single-layer plain weave, that is, the three-layer gradient structure is eliminated. The surface yarn, middle layer yarn and bottom layer yarn prepared in Example 2 are mixed in a weight ratio of 1:1:1 and woven in a single layer using a single-sided circular knitting machine with a plain weave. All other process parameters are the same as in Example 2.

[0034] Comparative Example 2: Unlike Example 2, this comparative example omits the hydrophilic modification treatment of fibers in step S3. The surface yarn is directly made by blending unmodified bio-based PA56 hollow cross-shaped profiled fiber obtained in step S2 with spandex fiber. All other process parameters are the same as in Example 2.

[0035] Comparative Example 3: Unlike Example 2, this comparative example uses a conventional circular cross-section spinneret instead of a hollow cross-shaped spinneret in step S2 to obtain conventional circular cross-section bio-based PA56 fibers. All other process parameters are the same as in Example 2.

[0036] Comparative Example 4: Unlike Example 2, in step S5 of this comparative example, the three-layer structure is interchanged, that is, the surface layer adopts terry weave, the middle layer adopts plain weave, and the bottom layer adopts tuck weave. All other process parameters are the same as those in Example 2.

[0037] II. Performance Testing: Further testing was conducted on the performance of Examples 1-3 and Comparative Examples 1-4: Example 1, Weight Detection: The test was conducted according to GB / T4669-2008 "Textiles - Determination of Mass per Unit Length and Mass per Unit Area of ​​Woven Fabrics," using an electronic analytical balance and a circular sampler. Finished fabric samples were selected, with three parallel samples chosen for each group. For each sample, a 100cm² specimen was cut using a circular sampler, discarding samples with surface contamination, edge defects, or uneven weave.

[0038] The cut specimens were conditioned for 24 hours under standard atmospheric conditions (temperature 20±2℃, relative humidity 65±4%). After conditioning, each specimen was weighed individually using an electronic analytical balance, accurate to 0.001g. The weighing results were converted to mass per unit area (g / ㎡). Each group of samples was tested in triplicate, and the average weight was calculated. The maximum and minimum values ​​were removed, and the average value was taken as the weight of the sample. During the test, the ambient temperature was strictly maintained at 20±2℃ and the relative humidity at 65±4%.

[0039] Experimental Example 2, Air Permeability Test: The test was conducted according to GB / T5453-1997 "Determination of Air Permeability of Textile Fabrics" using a digital fabric air permeability meter. Finished fabric samples were selected, with three parallel samples selected for each group. Each sample was cut into a 200mm × 200mm specimen, and samples with surface contamination, edge defects, or uneven weave were discarded.

[0040] The test specimens were conditioned for 24 hours under standard atmospheric conditions (temperature 20±2℃, relative humidity 65±4%). The conditioned specimens were then fixed in the test chamber of the air permeability meter, with a test area of ​​20 cm² and a pressure difference of 100 Pa. The instrument was started, and the airflow rate passing vertically through the specified area of ​​the specimen within a specified time was measured, directly reading the air permeability value. Three parallel tests were conducted for each sample, and the average air permeability value was calculated. The maximum and minimum values ​​were removed, and the average value was taken as the air permeability value of the sample. During the test, the ambient temperature was strictly maintained at 20±2℃ and the relative humidity at 65±4%.

[0041] Example 3, Water Droplet Diffusion Time Test: The test was conducted according to GB / T21655.1-2023 "Evaluation of Moisture Absorption and Quick-Drying Properties of Textiles - Part 1: Single-Item Combination Test Method," using a microburette and stopwatch. Finished fabric samples were selected, with three parallel samples selected for each group. Each sample was cut into pieces with dimensions not less than 150mm × 150mm, and samples with surface contamination, creases, or edge defects were discarded.

[0042] The specimen was conditioned for 24 hours under standard atmospheric conditions (temperature 20±2℃, relative humidity 65±4%). The conditioned specimen was then fixed flat on the test platform, ensuring the back of the specimen did not contact any object. 0.1 mL of grade III water was transferred using a microburette and dripped onto the front of the specimen from a height of 10 mm. Timing was started from the moment the water droplet touched the surface, observing its diffusion on the fabric. Timing continued until the specular reflection of the water droplet completely disappeared and it had fully penetrated the fabric. The diffusion time was recorded to an accuracy of 0.1 s. Three parallel tests were conducted for each sample. The maximum and minimum values ​​were removed, and the average value was taken as the water diffusion time. During the test, the ambient temperature was strictly maintained at 20±2℃ and the relative humidity at 65±4%.

[0043] Example 4, wicking height detection: The test was conducted according to FZ / T01071-2008 "Textiles - Test Method for Capillary Effect", using a capillary effect tester and a constant temperature water bath. Finished fabric samples were selected, with three parallel samples from each group. Three strips were cut from each sample along both the longitudinal and transverse directions. The strips were 250mm long and 30mm wide. Samples with surface contamination, edge defects, or uneven weave were discarded.

[0044] The specimens were conditioned for 24 hours under standard atmospheric conditions, with an conditioned environment temperature of 20±2℃ and a relative humidity of 65±4%. Three levels of water were poured into the water tank of the capillary effect tester, maintaining a consistent water level. The specimen was suspended vertically with its lower end immersed in the water 5mm, keeping it naturally vertical and not touching the container wall. Timing began 30 minutes after the lower end of the specimen touched the water surface. The height of the water rise along the specimen was recorded using the instrument's built-in scale, accurate to 1mm. Three specimens were tested in each direction for each sample group, and the average value of all valid data was calculated. After removing the maximum and minimum values, the average value was taken as the wicking height of the sample. During the test, the ambient temperature was strictly maintained at 20±2℃ and the relative humidity at 65±4%.

[0045] Example 5, Evaporation Rate Test: The test was conducted according to GB / T21655.1-2023 "Evaluation of Moisture Absorption and Quick-Drying Properties of Textiles - Part 1: Single-Item Combination Test Method," using an analytical balance, microburette, and stopwatch. Finished fabric samples were selected, with three parallel samples selected for each group. Each sample was cut into specimens with dimensions not less than 100mm × 100mm, and samples with surface contamination, creases, or edge defects were discarded.

[0046] The specimen was conditioned for 24 hours under standard atmospheric conditions (temperature 20±2℃, relative humidity 65±4%). The initial mass M0 of the conditioned specimen was measured to an accuracy of 0.001 g. The specimen was then fixed flat on the test platform. 0.2 mL of grade III water was transferred using a microburette and added evenly to the center of the specimen. The specimen was then quickly and vertically suspended in the standard atmospheric environment. Timing was started from the moment the water was added, and the specimen mass was measured every 5 minutes until the difference between two consecutive weighings was less than 0.5%. The time-evaporation rate curve was plotted, and the evaporation mass per unit time within the linear interval of the curve was calculated as the evaporation rate (g / h). Each sample was tested in triplicate. The maximum and minimum values ​​were removed, and the average value was taken as the evaporation rate of the sample. During the test, the ambient temperature was strictly maintained at 20±2℃ and the relative humidity at 65±4%.

[0047] Example 6, Bio-based content detection: The determination of bio-based content in solid, liquid, and gaseous samples by radiocarbon dating was performed using ASTM D6866, "Standard Test Method for Determination of Bio-based Content in Solid, Liquid, and Gas Samples by Radiocarbon Analysis," employing an accelerator mass spectrometer (AMS). Finished fabric samples were selected, with three parallel samples chosen for each group. Approximately 50 mg of a representative mixed sample was taken from each sample, removing surface contaminants and adhering substances.

[0048] The sample was thoroughly shredded into powder, mixed evenly, and placed in a sealed container. Radiocarbon isotope analysis (14C) was used, with the 14C to 12C isotope ratio determined by accelerator mass spectrometry. The result was compared with a standard reference to calculate the percentage (%) of bio-based carbon in the total organic carbon, accurate to 1%. Each sample was tested in triplicate; the maximum and minimum values ​​were removed, and the average value was taken as the bio-based carbon content of the sample.

[0049] Example 7, Anti-pilling grade test: The test was conducted according to GB / T4802.1-2008 "Textiles - Determination of Pilling Performance of Fabrics - Part 1: Circular Trajectory Method", using a fabric pilling tester and a grading box. Finished fabric samples were selected, with three parallel samples selected for each group. A circular specimen with a diameter of 113 mm was cut from each sample, and samples with surface contamination, creases, or edge defects were discarded.

[0050] The specimens were conditioned for 24 hours under standard atmospheric conditions, with an ambient temperature of 20±2℃ and a relative humidity of 65±4%. The specimens were mounted face-out on the specimen clamp of the pilling and fuzzing tester. During the fuzzing stage, a nylon brush and fabric abrasive were used for friction; during the pilling stage, only fabric abrasive was used. The number of fuzzing friction cycles was set to 10, and the number of pilling friction cycles to 50. After the test, the specimens were removed and visually rated by at least three trained rating personnel under a D65 standard light source in a rating box, comparing the results to a standard sample photograph. A 5-level system was used (level 5 for no pilling and level 1 for severe pilling), and the average value was taken as the sample's pilling resistance level. During the test, the ambient temperature was strictly maintained at 20±2℃ and the relative humidity at 65±4%.

[0051] Example 8: Performance retention test after 50 washes: The test was conducted according to GB / T8629-2017 "Home Washing and Drying Procedures for Textile Testing," using a standard washing machine and rotary dryer. Finished fabric samples were selected, with three parallel samples selected from each group. Each sample was cut into pieces with dimensions no smaller than 500mm × 500mm and placed in the washing machine along with the accompanying wash cloth.

[0052] A standard Type A washing machine was used, program 4N (washing temperature 40±3℃), and ECE standard detergent was used for 50 complete wash and dry cycles. After each wash, a tumble dryer was used for drying. After 50 cycles, the samples were conditioned for 24 hours under standard atmospheric conditions (temperature 20±2℃, relative humidity 65±4%). Following the methods in Examples 3 to 5, the drip diffusion time, wicking height, and evaporation rate of the samples after washing were retested, and the retention rate of each individual indicator relative to its pre-wash value was calculated. The arithmetic mean of the retention rates of each individual indicator was taken as the performance retention rate of the sample after 50 washes. During the test, the ambient temperature was strictly maintained at 20±2℃ and the relative humidity at 65±4%.

[0053] The specific test results are shown in Table 1 below: Table 1 Performance Test Data

[0054] Results analysis: Based on the differences between Examples 1-3 and Comparative Examples 1-4, and the performance test data table, it can be seen that the synergistic process of S2 profiled fiber preparation, S3 fiber hydrophilic modification treatment, S4 three-layer differentiated yarn preparation, and S5 double-sided circular knitting integrated three-layer gradient structure in this invention, as well as the profiled cross-section design of the surface bio-based PA56 profiled fiber, the synergy of fiber-stage hydrophilic modification treatment and post-finishing functional finishing, and the organizational design of the three-layer gradient wetting structure, significantly affect the fabric's drip diffusion time, wicking height, evaporation rate, and performance retention rate after 50 washes. The various process steps exhibit a good synergistic effect: the surface profiled fiber capillary microchannels synergistically guide moisture with the middle layer hydrophilic water-retaining fiber; the fiber hydrophilic modification treatment and bio-based functional finishing synergistically enhance hydrophilicity; and the three-layer gradient structure of plain weave, tuck weave, and loop weave synergistically forms a hydrophobic hollow moisture-guiding, hydrophilic water-retaining, and skin-friendly water-absorbing directional moisture conduction network, achieving the functional goals of efficient moisture absorption and quick drying, and long-lasting durability.

[0055] Comparative Example 1, lacking a three-layer gradient structure and instead using a single-layer plain weave structure with mixed yarns on a single-sided circular knitting machine, failed to form a directional moisture conduction channel with a surface layer for moisture wicking, a middle layer for water storage, and a bottom layer for water absorption. This resulted in a prolonged drip diffusion time of 2.8 s, a wicking height reduced to 72 mm / 30 min, an evaporation rate decreased to 0.21 g / h, and a performance retention rate of only 75% after 50 washes, making it the group with the worst overall performance. Comparative Example 2, omitting the fiber hydrophilic modification treatment in step S3, lacked chemical bonding modification of hydrophilic groups on the surface of the surface fibers, relying solely on the transient hydrophilicity imparted by post-treatment. Consequently, the drip diffusion time was prolonged to 1.8 s, the wicking height decreased to 105 mm / 30 min, and the performance retention rate dropped to 82% after 50 washes, with a comprehensive deterioration in the surface fiber's moisture wicking performance and durability. Comparative Example 3, by replacing the hollow cross-shaped spinneret with a conventional circular cross-section spinneret, resulted in the fiber losing the capillary microchannels provided by the longitudinal grooves. This led to a decrease in wicking height to 110 mm / 30 min, a prolonged drip diffusion time to 1.5 s, and a reduced evaporation rate to 0.28 g / h. The efficiency of wicking conduction of moisture along the fiber surface was significantly reduced. Comparative Example 4, by swapping the three-layer structure and replacing the surface layer with a terry loop structure, resulted in a looser, more moisture-retaining surface. This disrupted the gradient wetting sequence of the surface layer's tight, plain weave for moisture wicking, the middle layer's undulating weave for water storage, and the bottom layer's loose, absorbent loops. This prolonged the drip diffusion time to 2.2 s, reduced the wicking height to 95 mm / 30 min, decreased the evaporation rate to 0.24 g / h, and lowered the anti-pilling and anti-fuzzing grade to 3.5. Both the moisture-wicking function and appearance quality were negatively affected.

[0056] Examples 1-3 all meet the preset requirements for core performance indicators: weight 120-150 g / m², air permeability 6200-7200 g / m² / 24h, water droplet diffusion time 0.7-1.0 s, wicking height 122-140 mm / 30 min, evaporation rate 0.29-0.34 g / h, bio-based content 45%-47%, anti-pilling grade 4.0-4.5, and performance retention rate 90%-93% after 50 washes. Example 1 achieves basic performance standards with the lowest dosage of each component and the lowest combination of process parameters, suitable for economical products; Example 3 achieves higher mechanical strength and production efficiency with the highest dosage of each component and the highest combination of process parameters, suitable for scenarios with higher performance requirements. Example 2 achieves optimal performance balance with an intermediate dosage combination. The drip diffusion time is 0.7s, the lowest among the three examples; the wicking height is 140mm / 30min, the highest among the three examples; the evaporation rate is 0.34g / h, reaching the optimal level; and the performance retention rate after 50 washes is 93%, the highest among the three examples. Compared with Example 1, the drip diffusion time is shortened by 22% and the wicking height is increased by 14.8%. Compared with Comparative Examples 1-4, it has a qualitative improvement in drip diffusion time, wicking height, and washability. Moreover, the process conditions are mild and the cost is controllable, making it widely applicable to various sportswear, outdoor equipment, and underwear applications that have high requirements for moisture-wicking and quick-drying performance.

[0057] The core processes work together to create a deep synergistic effect: S2 and S3 work together, with the bio-based PA56 fiber undergoing a hollow cross-section design to form longitudinal groove capillary microchannels, followed by hydrophilic modification treatment at the fiber stage to introduce hydrophilic groups such as polyether segments on the fiber surface, giving the surface fiber both physical water conduction and chemical hydrophilicity, significantly improving wicking efficiency; S3 and S7 work together, with the hydrophilic modification treatment at the fiber stage giving the fiber lasting hydrophilicity, and the bio-based functional finishing stage further improving the overall wetting performance of the fabric. The dual hydrophilic treatment creates a functional synergy, ensuring that the fabric retains its moisture-wicking and quick-drying properties after 50 washes. The yield rate remains above 90%. S4 and S5 work synergistically, with a three-layer differentiated yarn design that constructs a wetting gradient from the bottom layer of hydrophilic cotton blended yarn to the middle layer of hydrophilic viscose blended yarn and then to the top layer of hydrophobic and moisture-wicking profiled fiber blended yarn. The double-sided circular knitting machine, with its three-layer structure of plain weave, tuck weave, and loop weave, extends the wetting gradient from the yarn level to the fabric structure level, forming a three-in-one gradient moisture-wicking network of materials, yarns, and structure. In S2, the bio-based PA56 chips are polymerized from bio-based 1,5-pentanediamine and adipic acid, with a bio-based carbon content of 44%–48%, giving the fabric significant green, low-carbon, and environmentally friendly advantages. All raw materials used in each process are commercially available industrial-grade raw materials, achieving component compatibility without complex processing, reducing production costs, and aligning with the concept of green production. Example 2 optimizes key parameters such as the neutralization reaction molar ratio of 1:1.02, prepolymerization temperature of 210℃, final polymerization temperature of 268℃, drying temperature of 105℃, spinning temperature of 270℃, stretching ratio of 3.2 times, 10 parts of hydrophilic modifier, 3 parts of crosslinking agent, impregnation temperature of 35℃, baking temperature of 150℃, surface layer blending ratio of 94:6, intermediate layer blending ratio of 45:55, bottom layer blending ratio of 65:35, circular knitting machine size of 30G, rotation speed of 24rpm, total thickness of 0.8mm, pre-drying temperature of 85℃, baking temperature of 125℃, and setting temperature of 142℃. This achieves seamless connection between each step, fully demonstrating the scientific nature and feasibility of the process parameter range of the present invention.

[0058] Comparative Examples 1-4, due to the absence or alteration of a single process step, resulted in the breakage of the overall synergistic chain: Comparative Example 1 disrupted the connection between the three-layer gradient structure and the integral molding in S5, causing the moisture-directed conduction network to degenerate into a single-layer disordered conduction structure; Comparative Example 2 disrupted the dual hydrophilicity synergy between S3 and S7, causing the surface fiber hydrophilicity to degenerate from a persistent type to a transient type; Comparative Example 3 disrupted the fiber cross-section design in S2, causing the fiber surface to lose capillary water-conducting channels; Comparative Example 4 disrupted the gradient sequence of the three-layer structure in S5, causing the wetting gradient to be reversed. The above comparative examples all demonstrate the irreplaceable nature of the key process steps and parameter selections of this invention, further illustrating that the synergistic effect of each process step is the core guarantee for achieving both efficient moisture absorption and quick drying, as well as long-lasting durability.

[0059] In summary, this invention effectively solves the technical problems of insufficient moisture-wicking efficiency, poor washability, and low bio-based content in existing moisture-wicking and quick-drying fabrics by using a four-core process design: the design of the irregular cross-section of bio-based PA56 irregular fibers and hydrophilic modification treatment at the fiber stage, preparation of three-layer differentiated yarns and integrated three-layer gradient structure knitting on a double-sided circular knitting machine. Combined with the synergistic optimization of parameters such as temperature, time, blending ratio, machine size, and roll-off rate, this invention effectively solves the technical problems of insufficient moisture-wicking efficiency, poor washability, and low bio-based content in existing moisture-wicking and quick-drying fabrics.

[0060] While specific embodiments of the present invention have been described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and not intended to limit the scope of the present invention. Equivalent modifications and variations made by those skilled in the art in accordance with the spirit of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A bio-based moisture-wicking and quick-drying fabric, characterized in that: The fabric is composed of a three-layer structure: an outer layer, a middle layer, and a bottom layer. The outer layer is made of a blend of hydrophilically modified bio-based PA56 profiled fiber and spandex fiber. The middle layer is made of a blend of bio-based viscose fiber and ordinary bio-based PA56 fiber. The bottom layer is made of a blend of fine denier bio-based PA56 fiber and cotton fiber. The outer layer, middle layer, and bottom layer are integrally formed by a knitting process.

2. The bio-based moisture-wicking and quick-drying fabric according to claim 1, characterized in that: The cross-section of the bio-based PA56 shaped fiber is at least one of the following: cross-shaped, Y-shaped, H-shaped, or hollow cross-shaped. The cross-sectional irregularity of the fiber is ≥25%, and the single filament fineness is 1.0 to 5.0 dtex. When a hollow cross-shaped cross-section is used, the hollowness is 18% to 22%, and the fiber surface has 4 longitudinal grooves with a depth of 0.05 to 0.08 mm evenly distributed.

3. The bio-based moisture-wicking and quick-drying fabric according to claim 1, characterized in that: The amounts of each fiber component in the fabric, by weight, are as follows: In the surface layer, 92-95 parts by weight of hydrophilically modified bio-based PA56 profiled fibers and 5-8 parts by weight of spandex fibers are present; in the middle layer, 40-50 parts by weight of bio-based viscose fibers and 50-60 parts by weight of ordinary bio-based PA56 fibers are present; in the bottom layer, 60-70 parts by weight of fine denier bio-based PA56 fibers and 30-40 parts by weight of cotton fibers are present.

4. The bio-based moisture-wicking and quick-drying fabric according to claim 1, characterized in that: The knitted integrated structure is as follows: the surface layer uses a plain weave, the middle layer uses a tuck weave, and the bottom layer uses a loop weave.

5. The bio-based moisture-wicking and quick-drying fabric according to claim 1, characterized in that: The total thickness of the three-layer structure of the fabric is 0.5 to 1.2 mm, of which the thickness of the top layer accounts for 20% to 30%, the thickness of the middle layer accounts for 40% to 50%, and the thickness of the bottom layer accounts for 20% to 30%.

6. A process for preparing a bio-based moisture-wicking and quick-drying fabric according to any one of claims 1-5, characterized in that: Includes the following steps: S1, Preparation of bio-based PA56 chips: Under nitrogen protection, bio-based 1,5-pentanediamine and adipic acid were neutralized to obtain PA56 salt solution. After purification, the solution was concentrated, prepolymerized and finalized, then extruded, water-cooled and pelletized to obtain bio-based PA56 chips. S2, Preparation of bio-based PA56 profiled fiber: The bio-based PA56 chips obtained in step S1 are dried and melt-spun, extruded through a spinneret with profiled spinneret holes, and then cooled, oiled, stretched and wound to obtain bio-based PA56 profiled fiber. S3, Fiber hydrophilic modification treatment: The bio-based PA56 profiled fiber obtained in step S2 is impregnated in a hydrophilic modification treatment solution, and hydrophilic modification treatment is carried out by padding and baking processes. S4, Yarn preparation: The surface material, intermediate material and bottom material are mixed separately and spun using Siro spinning process to obtain surface yarn, intermediate yarn and bottom yarn; S5, Knitting: Using a double-sided circular knitting machine, the surface yarn, middle layer yarn and bottom layer yarn are knitted together according to the preset structure to obtain the greige fabric; S6, Pretreatment: The grey fabric is subjected to desizing, simmering and bleaching in sequence; S7, Bio-based functional finishing: The pre-treated fabric is immersed in a bio-based moisture-absorbing and quick-drying finishing solution and finished using a two-dip and two-roll process. S8, Post-processing: The finished fabric is pre-dried, baked and shaped to obtain the finished bio-based moisture-wicking and quick-drying fabric.

7. The preparation process of a bio-based moisture-wicking and quick-drying fabric according to claim 6, characterized in that: In step S1, the molar ratio of bio-based 1,5-pentanediamine to adipic acid in the neutralization reaction is 1:1 to 1:1.

05. The purified PA56 salt solution has a concentration of 50%–65% and a pH value of 7–9. The prepolymerization reaction temperature is 190℃~230℃, the reaction pressure is 1.0MPa~2.5MPa, and the reaction time is 1~3 hours; the final polymerization reaction temperature is 260℃~275℃, and the final polymerization time is 1~2 hours.

8. The preparation process of a bio-based moisture-wicking and quick-drying fabric according to claim 6, characterized in that: In step S2, the drying process of the bio-based PA56 slices is carried out in a vacuum drum dryer at a temperature of 90°C to 120°C for 12 to 24 hours. After drying, the moisture content of the slices is reduced to below 200 ppm. The melt spinning temperature is 260℃~280℃; the stretching ratio is 2.5~4.0 times, and the stretching temperature is 150℃~180℃.

9. The preparation process of a bio-based moisture-wicking and quick-drying fabric according to claim 6, characterized in that: In step S3, the hydrophilic modification treatment liquid is composed of the following components in parts by weight: 5-15 parts hydrophilic modifier, 1-5 parts crosslinking agent, 0.1-1 parts catalyst, and 79-93.9 parts deionized water. The hydrophilic modifier is selected from at least one of polyethylene glycol, polyether-modified amino silicone oil, and hydrophilic polyurethane; The crosslinking agent is selected from at least one of citric acid, butanetetracarboxylic acid, and capped isocyanate; In the aforementioned impregnation and baking process, the impregnation temperature is 25℃~50℃, the roll residue rate is 70%~80%, the baking temperature is 130℃~170℃, and the baking time is 1~5 minutes.

10. The preparation process of a bio-based moisture-wicking and quick-drying fabric according to claim 6, characterized in that: In step S5, the machine number of the double-sided circular knitting machine is 28G to 32G, and the rotation speed is 22 to 26 rpm; In step S7, the bio-based moisture-absorbing and quick-drying finishing solution is composed of the following components in parts by weight: 2-4 parts chitosan quaternary ammonium salt, 1-3 parts silk fibroin hydrolysate, 0.5-1.5 parts citric acid, 0.1-0.3 parts penetrant JFC, 91.2-96.4 parts deionized water, and the roll residue of the two-dip and two-roll process is 70%-80%. In step S8, the pre-drying temperature is 80℃~90℃, the pre-drying time is 3~5 minutes, the baking temperature is 120℃~130℃, the baking time is 2~3 minutes, the shaping temperature is 140℃~145℃, the shaping time is 30~45 seconds, and the overfeed rate is 3%~5%.

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