One-way moisture-conducting antibacterial fabric and preparation method thereof

Abstract

The application discloses a one-way moisture-conducting antibacterial fabric and a preparation method thereof, and mainly relates to the technical field of fabric products made of fiber yarns. Compared with the prior art, the one-way moisture-conducting antibacterial fabric adopts a double-layer structure, the surface layer is bamboo charcoal yarn, moisture absorption, quick drying and sweat absorption are realized by utilizing the microporous structure of the bamboo charcoal powder, negative ions are released, and peculiar smell is adsorbed. The inner layer is composed of core-spun yarn and silver wire, wherein the Lycra spandex yarn provides elasticity, the dryarn polypropylene yarn provides heat preservation and heat storage, and the silver wire destroys the microbial cell structure through silver ions, thereby realizing persistent antibiosis. Through the synergistic effect of the moisture absorption and sweat release of the surface layer and the warmth preservation and antibiosis of the inner layer, the wearing comfort and health safety are improved, meanwhile, the fabric has far infrared performance, effectively adjusts body temperature, reduces heat loss, and meets different environmental and activity requirements.

Description

Technical Field

[0001] This invention relates to the field of textile products made from fiber yarns, and more particularly to a unidirectional moisture-wicking antibacterial fabric and its preparation method. Background Technology

[0002] One-way moisture-wicking fabric is a special functional textile. It incorporates special fibers that rapidly absorb moisture from the skin's surface and conduct it to the outer layer of the fabric when the body sweats, thus accelerating moisture evaporation and keeping the skin dry and comfortable. One-way moisture wicking reduces the reabsorption of moisture between the skin and the fabric, avoiding a damp and sticky feeling and improving wearing comfort. Enhancing the antibacterial properties of one-way moisture-wicking fabric effectively inhibits the growth of bacteria and fungi after the fabric becomes damp from sweat, reducing skin problems caused by bacteria in sweat. It is especially suitable for people with sensitive skin or who sweat easily, providing a safer and more hygienic wearing environment. One-way moisture-wicking antibacterial fabric is widely used in sportswear, medical clothing, underwear, and other fields, and is particularly suitable for occasions where it is necessary to keep the body dry and hygienic for extended periods, mainly by improving wearer comfort and reducing skin problems caused by damp environments.

[0003] Existing one-way moisture-wicking antibacterial fabrics address the issues of moisture absorption, quick-drying, and perspiration wicking by enhancing the fabric's moisture absorption capacity and wicking speed, improving its hydrophobicity to increase perspiration efficiency and reduce moisture retention on the fabric surface, and selecting novel polymers or synthetic fiber materials with higher absorbency and faster moisture diffusion rates. These methods can further improve the fabric's breathability, moisture absorption, quick-drying, perspiration wicking, and comfort. When the body sweats, the evaporation of sweat takes away heat, causing a drop in body temperature, which is especially noticeable in cold environments. To solve this problem, one-way moisture-wicking antibacterial fabrics can incorporate special materials to maintain body warmth while wicking away sweat. This reduces the amount of moisture lost through the skin while locking in body heat, preventing heat loss, maintaining a stable body temperature, and minimizing discomfort or health problems that may arise from a rapid drop in body temperature after sweating. This is particularly suitable for maintaining a suitable body temperature during activities such as skiing and mountaineering in cold environments.

[0004] CN110424091A discloses a unidirectional moisture-wicking antibacterial fabric and its preparation method, comprising a double-layer fabric. The inner layer of the double-layer fabric is woven with ultra-fine denier polypropylene yarn, and the outer layer is woven with zinc ion antibacterial fibers. The ultra-fine denier polypropylene yarn and the zinc ion antibacterial fibers are woven together using a double-sided circular knitting machine. This invention, through the double-layer fabric woven from ultra-fine denier polypropylene yarn and zinc ion antibacterial fibers, meets the comfort requirements of consumers when sweating heavily. It is especially suitable for infant clothing, textiles, and supplies, as it can quickly wick away saliva, sweat, or urine to the outer layer of the fabric, keeping the skin surface dry. It can solve many skin problems caused by sweat and urine in infants and young children. At the same time, it has excellent antibacterial properties against bacteria in sweat, saliva, urine, and bacteria acquired through other routes, providing excellent protection for the health of adults and infants and young children. It has a wide range of applications and a very broad market prospect. This invention uses ultra-fine denier polypropylene yarn as a one-way moisture-wicking material and adds zinc oxide to the antibacterial yarn to give the double-layer fabric good antibacterial properties, but it does not simultaneously solve the problems of heat loss and body temperature drop after sweating.

[0005] CN110356062A discloses a double-layer composite unidirectional moisture-wicking antibacterial fabric. The fabric adopts a weft-knitted double-sided structure, including a hydrophobic inner layer and a hydrophilic outer layer. The inner layer is made of polyester fiber, and the outer layer is made of cotton fiber. The cotton fiber is modified with carboxymethyl chitosan, which allows sweat molecules to first combine with the hydrophilic carboxymethyl cellulose and then more easily penetrate the inner hydrophobic polyester fabric layer to reach the outer hydrophilic cotton fiber layer, further improving moisture-wicking efficiency. This invention can improve moisture-wicking efficiency to help with perspiration and keep you cool, but it does not simultaneously solve the problems of heat loss and decreased body temperature after perspiration. Summary of the Invention

[0006] In view of the above-mentioned deficiencies of the prior art, the technical problem to be solved by the present invention is to improve the antibacterial, moisture-wicking and quick-drying properties of clothing fabrics while improving far-infrared performance, so as to effectively regulate body temperature and reduce heat loss.

[0007] To achieve the above objectives, the present invention provides a one-way moisture-wicking antibacterial fabric and a method for preparing the same.

[0008] The unidirectional moisture-wicking antibacterial fabric includes a surface fabric and an inner fabric.

[0009] The weight ratio of the outer fabric to the inner fabric is 58-62%: 38-42%;

[0010] The surface fabric is bamboo charcoal yarn;

[0011] The inner layer fabric is composed of core-spun yarn and silver thread.

[0012] The preparation method of the surface fabric is as follows: bamboo charcoal powder, oil agent and polyester chips are mixed together, added to an extruder and extruded to obtain mixed particles, and the mixed particles and synergistic resin are melt-spun to obtain the bamboo charcoal yarn.

[0013] In the preparation method of the surface fabric, the weight ratio of bamboo charcoal powder, oil, polyester chips, and synergistic resin is 1-4%: 0.1-0.5%: 75-97%: 0-24%.

[0014] The preferred granulation temperature is 130-230℃.

[0015] The preferred spinning temperature is 200-300℃, and the preferred spinning rate is 2500-3500m / min.

[0016] The oil is a polyester DTY oil.

[0017] The preparation method of the synergistic resin is as follows, in parts by weight:

[0018] Add 1-2 parts of pineapple leaf extract to 10-30 parts of 5-10 wt% sodium carbonate aqueous solution and stir for 1-2 hours. Dry at 90-100℃. After drying, add to 10-30 parts of 10-20 wt% acetic acid aqueous solution and stir for 0.5-1 hour. Add 10-30 parts of maleic anhydride and continue stirring for 0.5-1 hour. Dry at 90-100℃ to obtain modified pineapple leaf extract. Mix 1-2 parts of modified pineapple leaf extract with 15-25 parts of polyethylene and melt granulate to obtain modified polyethylene, i.e., the enhanced resin.

[0019] The preparation method of the inner layer fabric is as follows: Core-spun yarn and silver thread are simultaneously fed into a circular knitting machine, and the knitting is performed in 8-way yarn cycles. The first yarn cycle is connected to the silver thread, and the second, third, fourth, fifth, sixth, seventh, and eighth yarn cycles are connected to the core-spun yarn. The core-spun yarn in the inner layer fabric (e.g., Figure 1 (As shown) It is made of core yarn and covering yarn, and the preferred weight ratio of core yarn to covering yarn is 10-20%:80-90%.

[0020] The core yarn is preferably Lycra spandex yarn, and the covering yarn is preferably dryarn polypropylene yarn.

[0021] The method for making the unidirectional moisture-wicking antibacterial fabric is as follows: the outer layer fabric and the inner layer fabric are woven together using a circular knitting machine, with 8 yarns forming one cycle. Yarns 1, 3, 5, and 7 are the outer layer fabric, and yarns 2, 4, 6, and 8 are the inner layer fabric; or yarns 1, 3, 5, and 7 are the inner layer fabric, and yarns 2, 4, 6, and 8 are the outer layer fabric; thus, the unidirectional moisture-wicking antibacterial fabric is obtained.

[0022] The unidirectional moisture-wicking antibacterial fabric of this invention has a double-layer structure combining an inner layer and an outer layer. The outer layer fabric is bamboo charcoal yarn, whose main functions are moisture absorption and quick-drying, and moisture wicking. The bamboo charcoal yarn is prepared by blending bamboo charcoal powder with polyester chips and granulating the mixture, then adding an oil agent for surface etching to increase the specific surface area and form a microporous structure. The bamboo charcoal powder is made from bamboo after high-temperature carbonization and grinding; it has a rich porous structure and good adsorption properties, and can release negative ions as body temperature rises, effectively adsorbing odors and promoting moisture absorption and release. The inner layer fabric is composed of core-spun yarn and silver threads, and its main functions are antibacterial, heat retention and warmth preservation, and protection against the cold. The core-spun yarn is composed of Lycra spandex yarn and DryARN polypropylene. The Lycra spandex yarn provides excellent elasticity and a comfortable feel, while the natural water repellency and low thermal conductivity of DryARN polypropylene help retain heat, regulate body temperature, and reduce heat loss. The silver threads contain highly bioactive silver ions, effectively destroying the cell walls and cell membranes of bacteria, inhibiting the growth and reproduction of microorganisms. Even after hundreds of washes, it retains its antibacterial function, ensuring the long-term hygiene and safety of the fabric. This invention's unidirectional moisture-wicking antibacterial fabric, through the synergistic effect of the outer and inner layers, can quickly absorb and conduct heat while locking it in, maintaining temperature stability. This meets the wearer's comfort needs under different climates and activity levels. While improving the fabric's antibacterial properties, moisture-wicking and quick-drying properties, it also enhances far-infrared performance, effectively regulating body temperature and reducing heat loss.

[0023] The beneficial effects of this invention are:

[0024] Compared with existing technologies, the unidirectional moisture-wicking antibacterial fabric of this invention adopts a double-layer structure. The outer layer is made of bamboo charcoal yarn, utilizing the microporous structure of bamboo charcoal powder to achieve moisture absorption and quick drying, as well as moisture wicking and release of negative ions to absorb odors. The inner layer is composed of core-spun yarn and silver threads. Lycra spandex yarn provides elasticity, dryarn polypropylene provides heat retention, and the silver threads destroy the cell structure of microorganisms through silver ions, achieving long-lasting antibacterial properties. Through the synergistic effect of the moisture-wicking outer layer and the warmth and antibacterial properties of the inner layer, the fabric improves wearing comfort and hygiene, while also possessing far-infrared properties to effectively regulate body temperature and reduce heat loss, meeting the needs of different environments and activities. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of core-spun yarn.

[0026] Figure 2 , Figure 3 This is a diagram for the inspection and testing report. Detailed Implementation

[0027] The parameters of the specific chemical substances used in the examples are from the following sources:

[0028] The circular knitting machine is manufactured by Jinhua Emily Knitting Co., Ltd., and its model is SM8-TOP2.

[0029] Bamboo charcoal powder: 2000 mesh.

[0030] Polyester chips: Manufacturer: Shandong Shunxinlong New Material Technology Co., Ltd., Model: CZ-318.

[0031] Polyester DTY oil: The effective ingredient content is 98.5%, the manufacturer is Yixing Jiateng Chemical Co., Ltd., and the model is TK-3182A.B.

[0032] Polyethylene: Manufacturer: Dongguan Longhuang Plastic Raw Materials Co., Ltd., Grade: 118P.

[0033] Pineapple leaf extract: 100 mesh, Ningxia Xiangcao Biotechnology Co., Ltd., product number xcsw20210322.

[0034] Core-spun yarn: The manufacturer is Haining Chuangwei Spandex Co., Ltd., and the specifications are 20D Lycra spandex and 50D DryARN polypropylene. The fineness of Lycra spandex is 20D, and the fineness of DryARN polypropylene is 50D, that is, 20 / 50 polypropylene yarn.

[0035] Silver yarn: Manufactured by Qingdao Yinyuansu Textile Technology Co., Ltd., specification 40D / 12FFDY, base material is nylon. The manufacturer calls it silver mousse, which refers to the uniform adhesion of 99.9% pure metallic silver to the surface of nylon yarn. This structure not only gives silver mousse the textile properties of ordinary yarn, but also endows it with the benefits of silver.

[0036] Example 1

[0037] A one-way moisture-wicking antibacterial fabric includes a surface fabric and an inner fabric;

[0038] The surface fabric is bamboo charcoal yarn;

[0039] The inner layer fabric is composed of core-spun yarn and silver thread.

[0040] The preparation method of the surface fabric is as follows: 3.0g of bamboo charcoal powder, 0.4g of polyester DTY oil agent and 96.6g of polyester chips are mixed and added to an extruder for extrusion granulation to obtain mixed particles. The mixed particles are melt-spun at 200℃, the spinning temperature is 200℃ and the spinning rate is 3000m / min to obtain the bamboo charcoal yarn.

[0041] The preparation method of the inner layer fabric is as follows: the core-spun yarn and silver thread are fed into the yarn simultaneously through a circular knitting machine, and the yarn is woven in a cycle of 8 yarns. The first yarn is connected to the silver thread, and the second, third, fourth, fifth, sixth, seventh and eighth yarns are connected to the core-spun yarn.

[0042] A method for preparing a one-way moisture-wicking antibacterial fabric is as follows: A 60.0g surface fabric (50cm x 50cm) and a 40.0g inner fabric (50cm x 50cm) are knitted together using a circular knitting machine, with each knitting cycle consisting of 8 yarns. Yarns 1, 3, 5, and 7 are the surface fabric, and yarns 2, 4, 6, and 8 are the inner fabric; thus, the one-way moisture-wicking antibacterial fabric is obtained.

[0043] Comparative Example 1

[0044] A one-way moisture-wicking antibacterial fabric includes a surface fabric and an inner fabric;

[0045] The surface fabric is polyester yarn;

[0046] The inner layer fabric is composed of core-spun yarn and silver thread.

[0047] The preparation method of the surface fabric is as follows: 0.4g of polyester DTY oil agent is mixed with 99.6g of polyester chips, and the mixture is added to an extruder for extrusion granulation to obtain mixed particles. The mixed particles are then melt-spun at 200℃ with a spinning temperature of 200℃ and a spinning rate of 3000m / min to obtain the polyester yarn.

[0048] The preparation method of the inner layer fabric is as follows: the core-spun yarn and silver thread are fed into the yarn simultaneously through a circular knitting machine, and the yarn is woven in a cycle of 8 yarns. The first yarn is connected to the silver thread, and the second, third, fourth, fifth, sixth, seventh and eighth yarns are connected to the core-spun yarn.

[0049] A method for preparing a one-way moisture-wicking antibacterial fabric is as follows: A 60.0g surface fabric (50cm x 50cm) and a 40.0g inner fabric (50cm x 50cm) are knitted together using a circular knitting machine, with each knitting cycle consisting of 8 yarns. Yarns 1, 3, 5, and 7 are the surface fabric, and yarns 2, 4, 6, and 8 are the inner fabric; thus, the one-way moisture-wicking antibacterial fabric is obtained.

[0050] Comparative Example 2

[0051] A one-way moisture-wicking antibacterial fabric includes a surface fabric and an inner fabric;

[0052] The surface fabric is bamboo charcoal yarn;

[0053] The inner layer fabric is core-spun yarn.

[0054] The preparation method of the surface fabric is as follows: 3.0g of bamboo charcoal powder, 0.4g of polyester DTY oil agent and 96.6g of polyester chips are mixed and added to an extruder for extrusion granulation to obtain mixed particles. The mixed particles are melt-spun at 200℃, the spinning temperature is 200℃ and the spinning rate is 3000m / min to obtain the bamboo charcoal yarn.

[0055] The preparation method of the inner layer fabric is as follows: the core-spun yarn is fed into the circular knitting machine and knitted in a cycle of 8 yarns, with the 1st, 2nd, 3rd, 4th, 5th, 6th, 7th and 8th yarns being connected to the core-spun yarn.

[0056] A method for preparing a one-way moisture-wicking antibacterial fabric is as follows: A 60.0g surface fabric (50cm x 50cm) and a 40.0g inner fabric (50cm x 50cm) are knitted together using a circular knitting machine, with each knitting cycle consisting of 8 yarns. Yarns 1, 3, 5, and 7 are the surface fabric, and yarns 2, 4, 6, and 8 are the inner fabric; thus, the one-way moisture-wicking antibacterial fabric is obtained.

[0057] Example 2

[0058] A one-way moisture-wicking antibacterial fabric includes a surface fabric and an inner fabric;

[0059] The surface fabric is bamboo charcoal yarn;

[0060] The inner layer fabric is composed of core-spun yarn and silver thread.

[0061] The preparation method of the surface fabric is as follows: 3.0g of bamboo charcoal powder, 0.4g of polyester DTY oil agent and 80.6g of polyester chips are mixed and added to an extruder for extrusion granulation to obtain mixed particles. The mixed particles and 16.0g of synergistic resin are melt-spun at 200℃ with a spinning temperature of 200℃ and a spinning rate of 3000m / min to obtain the bamboo charcoal yarn.

[0062] The preparation method of the synergistic resin is as follows:

[0063] 2g of pineapple leaf extract was added to 20g of 5wt% sodium carbonate aqueous solution and stirred for 2 hours. The mixture was then dried at 100℃. After drying, the extract was added to 20g of 10wt% acetic acid aqueous solution and stirred for 1 hour. 20g of maleic anhydride was added and the mixture was stirred for another 0.5 hours. The mixture was then dried at 100℃ to obtain modified pineapple leaf extract. 1g of modified pineapple leaf extract was mixed with 20g of polyethylene and melt-granulated at 130℃ to obtain modified polyethylene, which is the enhanced resin.

[0064] The preparation method of the inner layer fabric is as follows: the core-spun yarn and silver thread are fed into the yarn simultaneously through a circular knitting machine, and the yarn is woven in a cycle of 8 yarns. The first yarn is connected to the silver thread, and the second, third, fourth, fifth, sixth, seventh and eighth yarns are connected to the core-spun yarn.

[0065] A method for preparing a one-way moisture-wicking antibacterial fabric is as follows: A 60.0g surface fabric (50cm x 50cm) and a 40.0g inner fabric (50cm x 50cm) are knitted together using a circular knitting machine, with each knitting cycle consisting of 8 yarns. Yarns 1, 3, 5, and 7 are the surface fabric, and yarns 2, 4, 6, and 8 are the inner fabric; thus, the one-way moisture-wicking antibacterial fabric is obtained.

[0066] Example 3

[0067] A one-way moisture-wicking antibacterial fabric includes a surface fabric and an inner fabric;

[0068] The surface fabric is bamboo charcoal yarn;

[0069] The inner layer fabric is composed of core-spun yarn and silver thread.

[0070] Example 3 differs from Example 2 only in the addition of a synergistic resin.

[0071] The preparation method of the synergistic resin is as follows:

[0072] 1g of pineapple leaf extract was mixed with 20g of polyethylene and melt-granulated at 130℃ to obtain modified polyethylene, namely the enhanced resin.

[0073] A method for preparing a one-way moisture-wicking antibacterial fabric is as follows: A 60.0g surface fabric (50cm x 50cm) and a 40.0g inner fabric (50cm x 50cm) are knitted together using a circular knitting machine, with each knitting cycle consisting of 8 yarns. Yarns 1, 3, 5, and 7 are the surface fabric, and yarns 2, 4, 6, and 8 are the inner fabric; thus, the one-way moisture-wicking antibacterial fabric is obtained.

[0074] Example 4

[0075] A one-way moisture-wicking antibacterial fabric includes a surface fabric and an inner fabric;

[0076] The surface fabric is bamboo charcoal yarn;

[0077] The inner layer fabric is composed of core-spun yarn and silver thread.

[0078] Example 4 differs from Example 2 only in the addition of a synergistic resin.

[0079] The enhancing resin is polyethylene resin.

[0080] A method for preparing a one-way moisture-wicking antibacterial fabric is as follows: A 60.0g surface fabric (50cm x 50cm) and a 40.0g inner fabric (50cm x 50cm) are knitted together using a circular knitting machine, with each knitting cycle consisting of 8 yarns. Yarns 1, 3, 5, and 7 are the surface fabric, and yarns 2, 4, 6, and 8 are the inner fabric; thus, the one-way moisture-wicking antibacterial fabric is obtained.

[0081] Test Example 1

[0082] The antibacterial properties of the unidirectional moisture-wicking antibacterial fabrics prepared by the methods in Example 1 and Comparative Examples 1-2 were tested for their antibacterial rate. The tested bacteria were Staphylococcus aureus, Escherichia coli, and Candida albicans. The tests were conducted according to the industry standard FZ / T 73023-2006 "Antibacterial Knitted Fabrics", and the data are summarized in Table 1.

[0083] Table 1 Antibacterial Performance Test

[0084] Example 1 Comparative Example 1 Comparative Example 2 Staphylococcus aureus inhibition rate 99.9％ 97.4％ 96.8％ Escherichia coli inhibition rate 99.5％ 94.9％ 94.6％ Candida albicans inhibition rate 99.9％ 94.3％ 94.0％

[0085] Compared to the examples, the one-way moisture-wicking antibacterial fabric of Comparative Example 1 did not contain bamboo charcoal powder, and the one-way moisture-wicking antibacterial fabric of Comparative Example 2 did not contain silver threads. Their inhibitory effects on Staphylococcus aureus, Escherichia coli, and Candida albicans were significantly lower than those of Example 1. In the one-way moisture-wicking antibacterial fabric of Example 1 of this invention, the surface layer is bamboo charcoal yarn, with added bamboo charcoal powder and oil. Bamboo charcoal powder is a powdery substance made from bamboo through high-temperature carbonization and grinding. It has a rich porous structure and good adsorption properties. When body temperature rises, the pores of the bamboo charcoal powder expand and release negative ions, effectively adsorbing odors and absorbing moisture and sweat. In the preparation of the bamboo charcoal yarn, bamboo charcoal powder is blended and granulated with polyester chips. The addition of oil corrodes the fabric surface to form a microporous structure, increasing the specific surface area of ​​the bamboo charcoal yarn and further improving the fabric's moisture absorption, wicking, and quick-drying properties. In Example 1, silver threads were added to the inner layer of the unidirectional moisture-wicking antibacterial fabric. Silver ions have excellent antibacterial properties and can maintain their antibacterial function after hundreds of washes when applied to clothing fabrics. The high bioactivity of silver ions can destroy the integrity of the cell wall and cell membrane of bacteria, leading to bacterial death, thereby inhibiting their growth and reproduction. Combined with the antibacterial properties of bamboo charcoal yarn with microporous structure, the antibacterial properties are synergistically enhanced to improve the overall antibacterial performance of the fabric.

[0086] Test Example 2

[0087] The unidirectional moisture-wicking antibacterial fabrics prepared by the methods in Example 1 and Comparative Examples 1-2 were tested for moisture-wicking and quick-drying properties, with the inner layer being the water-soaked surface and the outer layer being the permeable surface. The tests were conducted according to the national standard GB / T 21655.2-2019 "Evaluation of Moisture-wicking and Quick-drying Properties of Textiles - Part 2: Dynamic Moisture Transfer Method". The data are summarized in Table 2.

[0088] The soaking time refers to the time required from the moment the liquid comes into contact with the fabric surface until the fabric begins to absorb moisture.

[0089] Water absorption rate refers to the rate at which the moisture content of a fabric increases per unit time.

[0090] The maximum wetting radius refers to the maximum radius of the wetted area from the start of wetting the fabric to the end of the specified time.

[0091] Liquid water diffusion rate refers to the cumulative transfer rate of liquid water along the radial direction when it diffuses to the maximum wetting radius after the fabric surface is wetted.

[0092] The one-way transfer index refers to the ability of liquid water to transfer from the wetted side of a fabric to the permeated side.

[0093] Table 2. Moisture absorption and wicking performance test

[0094]

[0095]

[0096] As shown in the table above, the unidirectional moisture-wicking antibacterial fabric of Example 1 performed excellently in the tests of moisture absorption and quick-drying performance and moisture-wicking properties. Comparative Example 1 did not add bamboo charcoal powder to the fabric of Example 1, and Comparative Example 2 did not add silver threads to the fabric of Example 1. The inner layer of the fabric is the soaked surface, and the outer layer is the permeable surface. The soaking time of the inner soaked surface of Examples 1 and Comparative Example 2 was determined to be level 4, indicating that it could quickly absorb and soak the fabric. However, the water absorption rate of the permeable surface was level 3, indicating that the inner layer of the fabric of Examples 1 and Comparative Example 2 quickly drained the water to the outside of the fabric after soaking, accelerating evaporation and making it easier to dry quickly. The maximum soaking radius and liquid water diffusion rate of the permeable surface of Comparative Example 1 were lower than those of Examples 1 and Comparative Example 2. Its soaking time and water absorption rate of both the soaked and permeable surfaces were level 3, indicating that the inner layer did not quickly drain after soaking. This suggests that the lack of bamboo charcoal powder affected the moisture absorption and quick-drying properties. The reason lies in the microporous structure and adsorption properties of bamboo charcoal yarn. The hydrophobic porous structure of bamboo charcoal powder provides a larger specific surface area, while the micropores formed by oil corrosion also help to quickly drain moisture, accelerating moisture absorption and evaporation. A higher unidirectional conductivity index indicates a stronger drainage capacity of the water-soaked surface to the permeable surface. In Examples 1 and 2, the bamboo charcoal yarn in the inner layer contributes to the overall moisture absorption, quick-drying properties, and moisture wicking of the fabric.

[0097] Test Example 3

[0098] The unidirectional moisture-wicking antibacterial fabrics prepared using the methods in Examples 1-4 were subjected to far-infrared performance testing. The testing was conducted according to the national standard GB / T 30127-2013 "Testing and Evaluation of Far-Infrared Properties of Textiles". For general samples, if the far-infrared emissivity of the sample is not less than 0.88 and the far-infrared radiation temperature rise is not less than 1.4℃, it indicates that the sample has far-infrared properties. The far-infrared emissivity and far-infrared radiation temperature rise values ​​were tested, and the data are summarized in Table 3.

[0099] Table 3 Far-infrared performance test

[0100] Example 1 Example 2 Example 3 Example 4 Far-infrared emissivity 0.91 0.93 0.92 0.91 Far-infrared radiation temperature rise value 1.7 1.9 1.8 1.8

[0101] Far-infrared emissivity represents the ratio of the normal far-infrared radiation intensity of a sample to that of a standard blackbody plate at the same temperature under specified conditions. Far-infrared radiation temperature rise represents the temperature increase on the surface of the sample after it has been irradiated with a constant intensity for a certain period. A higher far-infrared emissivity and a higher far-infrared radiation temperature rise indicate better far-infrared performance of the textile sample. Improving the far-infrared performance of textiles can promote blood circulation, improve oxygen supply, maintain a stable body temperature, and reduce heat loss by reflecting and absorbing heat emitted by the human body. It can also extend to absorbing far-infrared rays from sunlight and converting them into heat energy, thus maintaining warmth even in cold environments.

[0102] In the unidirectional moisture-wicking antibacterial fabrics of Examples 1-4, the far-infrared emissivity of all examples was not less than 0.88, and the far-infrared radiation temperature rise was not less than 1.4℃, indicating that these fabrics all possess good far-infrared performance. The inner layer fabric in the embodiments of this invention is composed of core-spun yarn and silver yarn. The core-spun yarn is composed of Lycra spandex yarn and dryarn polypropylene yarn. Lycra spandex provides good elasticity and comfort, while dryarn polypropylene, due to its natural water repellency and low thermal conductivity, effectively retains heat, regulates body temperature, and reduces heat loss. Examples 2-4, based on the scheme of Example 1, added synergistic resins in the preparation of the inner layer fabric. In Example 2, pineapple leaf extract was first modified with acetic acid and maleic anhydride, and then melt-granulated with polyethylene resin to obtain the synergistic resin. Compared with Example 2, Example 3 did not add maleic anhydride to modify the pineapple leaf extract, and Example 4 did not add pineapple leaf extract. The comparison shows that the far-infrared performance of Example 2 is higher than that of other examples. This is because polyethylene has a higher specific heat capacity, enabling it to absorb and store more heat. The hydroxyl groups on the surface of the pineapple leaf extract, after acetylation modification, generate weaker polar ester groups, improving surface hydrophobicity and thermal stability, ensuring stable melt granulation without damage. The modified pineapple leaf extract enhances the interfacial strength with polyethylene, and grafting the modified pineapple leaf extract improves its compatibility with polyester chips. It also improves the dispersibility of bamboo charcoal powder, which plays a positive role in improving tensile strength and elongation at break when applied to the fabric. This indicates that the addition of the synergistic resin further enhances the overall far-infrared performance. In the unidirectional moisture-wicking antibacterial fabric of this invention, the inner layer locks in heat while the outer layer absorbs heat, working together to enable the fabric to better maintain temperature stability in environments with temperature changes.

[0103] Test Example 4

[0104] The unidirectional moisture-wicking antibacterial fabric obtained in Example 1 was sent for testing, and the test report is shown in the figure below. Figure 2-3 As shown, Figure 2 This includes: odor, fiber content, pre-wash static electricity properties, pre-wash and post-wash moisture absorption and quick-drying properties, pre-wash and post-wash moisture wicking properties, and water resistance and colorfastness. Figure 3 Including: colorfastness to dry rubbing, colorfastness to acid and perspiration stains, colorfastness to alkaline perspiration stains, formaldehyde content, pH value, decomposable carcinogenic aromatic amine dyes, antibacterial properties, and far-infrared performance before and after washing.

[0105] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A one-way moisture-wicking antibacterial fabric, characterized in that: The unidirectional moisture-wicking antibacterial fabric includes a surface fabric and an inner fabric. The weight ratio of the outer fabric to the inner fabric is 58-62%: 38-42%; The surface fabric is bamboo charcoal yarn; The inner layer fabric is composed of core-spun yarn and silver thread; The preparation method of the surface fabric is as follows: bamboo charcoal powder, oil agent, and polyester chips are mixed, added to an extruder, and granulated to obtain mixed particles. The mixed particles and enhancing resin are melt-spun to obtain the bamboo charcoal yarn. In the preparation method of the surface fabric, the weight ratio of bamboo charcoal powder, oil agent, polyester chips, and enhancing resin is 1-4%. 0.1-0.5%：75-97%：0-24%； The preparation method of the synergistic resin is as follows, in parts by weight: Add 1-2 parts of pineapple leaf extract to 10-30 parts of 5-10 wt% sodium carbonate aqueous solution and stir for 1-2 hours. Dry at 90-100℃. After drying, add to 10-30 parts of 10-20 wt% acetic acid aqueous solution and stir for 0.5-1 hour. Add 10-30 parts of maleic anhydride and continue stirring for 0.5-1 hour. Dry at 90-100℃ to obtain modified pineapple leaf extract. Mix 1-2 parts of modified pineapple leaf extract with 15-25 parts of polyethylene and melt granulate to obtain modified polyethylene, i.e., the enhanced resin.

2. The unidirectional moisture-wicking antibacterial fabric as described in claim 1, characterized in that, The preparation method of the inner layer fabric is as follows: the core-spun yarn and silver thread are fed into the yarn simultaneously through a circular knitting machine, and the yarn is woven in a cycle of 8 yarns. The first yarn is connected to the silver thread, and the second, third, fourth, fifth, sixth, seventh and eighth yarns are connected to the core-spun yarn.

3. The unidirectional moisture-wicking antibacterial fabric as described in claim 2, characterized in that, The core-spun yarn is made of core yarn and covering yarn, and the weight ratio of core yarn to covering yarn is 10-20%: 80-90%.

4. The unidirectional moisture-wicking antibacterial fabric as described in claim 3, characterized in that, The core yarn is Lycra spandex yarn.

5. The unidirectional moisture-wicking antibacterial fabric as described in claim 3, characterized in that, The covering yarn is dryarn polypropylene yarn.

6. A method for preparing a unidirectional moisture-wicking antibacterial fabric as described in any one of claims 1-5, characterized in that, The preparation method is as follows: the outer layer fabric and the inner layer fabric are woven together using a circular knitting machine, with 8 yarns forming one cycle. Yarns 1, 3, 5, and 7 are the outer layer fabric, and yarns 2, 4, 6, and 8 are the inner layer fabric; or yarns 1, 3, 5, and 7 are the inner layer fabric, and yarns 2, 4, 6, and 8 are the outer layer fabric; thus, the unidirectional moisture-wicking antibacterial fabric is obtained.

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