A hat sweatband and method of manufacture thereof

Abstract

The application relates to the technical field of hat auxiliary materials, in particular to a hat sweatband and a manufacturing method thereof, which comprises a skin-friendly sweat-absorbing layer, a sponge layer and a sweat-releasing layer; the two side edges of the skin-friendly sweat-absorbing layer are folded and superimposed on the edge of the outer side surface of the sweat-releasing layer; the skin-friendly sweat-absorbing layer, the sweat-releasing layer and the sponge layer are hot-pressed into shape through composite hot melt glue. In the application, the skin-friendly sweat-absorbing layer and the sponge layer of the sweatband are specially treated, so that the sweatband can continuously provide cool feeling when directly contacting the skin, and the sweatband is moisture-absorbing, quick-drying, sweat-retaining-avoiding, and the special treatment of the composite hot melt glue for hot melt bonding between the skin-friendly sweat-absorbing layer and the sweat-releasing layer can effectively improve the stability of the sweatband in continuously providing cool feeling, the substance loaded in the sponge layer is not easy to be lost, the washable durability of the sweatband is enhanced, so that the sweatband is durable and can continuously realize the dryness, ventilation and cool feeling of the head for a long time.

Description

Technical Field

[0001] This invention relates to the field of clothing and hat accessories technology, specifically to a hat sweatband and its manufacturing method. Background Technology

[0002] To ensure greater comfort for the wearer, existing technologies require a sweatband at the point where the hat fits against the head. One function of the sweatband is to reduce friction between the hat and the head using an elastic layer, thus increasing wearing comfort; another function is to absorb sweat when there is a lot of sweat on the head, especially the forehead.

[0003] For example, Chinese patent CN205728285U discloses a hat sweatband, in which multiple protrusions are provided on the side of the sweatband that contacts the human head; the outer side of the protrusions is arc-shaped with a radius of 2-4 mm and an arc of 60-300°; this hat sweatband has a simple structure, especially the protrusions, which massage the head and make the scalp very comfortable; at the same time, the protrusions form channels that facilitate air flow, resulting in good breathability and preventing stuffiness even after prolonged contact with the head; however, this technical solution only focuses on air exchange and does not solve the problem of sweat retention on the skin contact surface, thus failing to provide a direct cooling sensation; For example, Chinese patent CN2891716Y discloses a new type of hat, including a hat body and a visor. At the lower part of the hat body is an elastic sweatband that can stretch and contract with the hat body. The elastic sweatband is semi-enclosed and fixed to both sides of the lower part of the hat body. This hat has a relatively simple manufacturing process, resulting in better elasticity of the sweatband, a more aesthetically pleasing hat, and easier cleaning of the sweatband. However, this technical solution only considers cost savings through optimized manufacturing processes, without adjusting the sweatband material and structure. It emphasizes sweatband cost and appearance, failing to meet consumers' needs for practical outdoor functions (moisture wicking, cooling, and breathability). Furthermore, existing sweatbands are mainly composed of a surface layer, an elastic layer, and a back layer. The elastic layer is often made of sponge. When squeezed between the head circumference and the brim, the sponge absorbs sweat through the surface layer as it rebounds. The back layer is usually made of hydrophobic material. Due to the hydrophobicity of the back layer, sweat tends to accumulate within the sponge. The water vapor formed by the evaporation of sweat in the sponge is then expelled through the pores of the back layer. However, sweat tends to diffuse within the back layer and cannot be quickly expelled, leading to excessive sweat accumulation in the sponge. This results in insufficient breathability, causing the head to feel stuffy and lacking a sustained cooling sensation, thus affecting the user's comfort. Summary of the Invention

[0004] In view of the problems existing in the prior art, the present invention aims to solve the problems of stuffiness, sweat accumulation, insufficient breathability and lack of continuous cooling caused by traditional hats in hot or sports environments, and provides a functional hat sweatband with reasonable structure, functional materials, and no need for external power to achieve continuous dryness, breathability and cooling of the head.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A hat sweatband includes a skin-friendly sweat-absorbing layer, a sponge layer, and a sweat-wicking layer; The two sides of the skin-friendly and sweat-absorbing layer are folded over and overlapped with the outer surface edge of the sweat-wicking layer; The skin-friendly sweat-absorbing layer, the sweat-wicking layer, and the sponge layer are formed by hot pressing with composite hot melt adhesive; The composite hot melt adhesive is obtained by adding nanocomposite materials to hot melt adhesive and then dispersing and mixing them uniformly through high-speed shearing. The skin-friendly and sweat-absorbing layer is woven from hydrophilic fibers containing porous silver nanowires; The sponge layer is selected from a highly elastic absorbent sponge that has been treated with a cooling microcapsule impregnation solution; The wicking layer is woven from wicking yarn.

[0006] As a further preferred embodiment of the present invention, the skin-friendly and sweat-absorbing layer is prepared by immersing the cleaned hydrophilic fibers in a porous silver nanowire ethanol dispersion with a solid content of 1-2 wt% for 5-10 minutes at room temperature, removing and squeezing out excess liquid, drying at 80-85°C for 5-10 minutes, baking at 100-120°C for 3-5 minutes, and then weaving. The porous silver nanowire ethanol dispersion is prepared by adding porous silver nanowires to ethanol, then adding dispersant PVP, and stirring thoroughly until homogeneous. The porous silver nanowire ethanol dispersion contains 1-2 wt% solids and 0.1-0.2 wt% PVP dispersant. The sponge layer is made by rinsing the high-elasticity absorbent sponge with clean water, squeezing out the water, and then completely immersing it in the cooling microcapsule impregnation liquid. The squeezing and releasing is repeated 5-10 times. After soaking and keeping warm at room temperature for 5-10 minutes, it is then squeezed manually to control the liquid retention rate to 80-100%, and then dried. The content of nanocomposite material in the composite hot melt adhesive is 0.3-0.8 wt%.

[0007] As a further preferred embodiment of the present invention, the hot melt adhesive is selected from any one of polyamide hot melt adhesive, thermoplastic polyurethane hot melt adhesive, and copolyester hot melt adhesive; The hydrophilic fiber is selected from one of pure cotton, cotton-polyester blend, hydrophilic modified polyester, and hydrophilic modified nylon; Hydrophilic modified polyester and hydrophilic modified nylon are made by grafting or blending hydrophilic components onto polyester and nylon to achieve a hydrophilic effect, thereby absorbing and retaining water, preventing sweating, and not irritating the skin. The moisture-wicking yarn is selected from one of ordinary polyester, polypropylene, and nylon.

[0008] As a further preferred embodiment of the present invention, the nanocomposite material is prepared by the following method: 1) Melamine and β-cyclodextrin are placed in a container, deionized water is added, and the mixture is stirred at 200-300 r / min for 30-50 min. Then, it is transferred to a hydrothermal reactor and placed in an oven for hydrothermal reaction for 24-30 h. After the reaction is completed, it is cooled to room temperature, thoroughly washed and dried, and then calcined in a muffle furnace for 4-6 h. After cooling to room temperature, it is thoroughly ground to obtain porous nanosheets. 2) Place tetrabutyl titanate and acetic acid in a container, sonicate for 50-80 min, add porous nanosheets, sonicate for another 30-50 min, then transfer to a high-pressure reactor. Place the reactor in a drying oven and maintain a constant temperature of 150-160℃ for 10-13 h. After naturally cooling to room temperature, wash with deionized water and ethanol alternately, dry at 75-80℃ for 10-15 h, and then anneal in an annealing furnace for 3-5 h to obtain the nanocomposite material.

[0009] Furthermore, the ratio of melamine, β-cyclodextrin, and deionized water is (4-7) g: (3-10) mg: (60-100) mL; The hydrothermal reaction is carried out at a temperature of 180-185℃. The calcination temperature is 550-580℃; The ratio of tetrabutyl titanate, acetic acid, and porous nanosheets is (5-10) mL: (150-250) mL: (3-8) g; The ultrasonic treatment has a power of 200-300W; The annealing process is performed at a temperature of 350-360℃.

[0010] As a further preferred embodiment of the present invention, the cooling microcapsule impregnation solution is prepared by the following method: 1) Dissolve sodium dodecylbenzenesulfonate in deionized water, stir thoroughly, and heat to 40-43℃ to form an emulsion aqueous phase. Melt n-octadecane and slowly pour it into a container with a water bath at 40-45℃ to form an emulsion oil phase. Then pour the above emulsion aqueous phase into the emulsion oil phase and homogenize and emulsify at 10000-15000r / min for 3-5min to obtain a microcapsule emulsion. 2) Add ethanol to deionized water and mix thoroughly. While stirring continuously at 300-500 rpm, add Tween-80 and fatty alcohol polyoxyethylene ether in sequence. Stir for 10-15 minutes until fully dissolved. Then add sodium carboxymethyl cellulose and stir at 600-700 rpm for 20-30 minutes. Add sodium benzoate and continue stirring for 5-10 minutes. Add citric acid and adjust the pH to 6.5-7.5 to obtain a mixed solvent. 3) After hydrophobic treatment, porous silver nanowires are added to the microcapsule emulsion and ultrasonically dispersed to obtain a mixed emulsion. Then, amino resin prepolymer is added, the temperature is raised to 70-75℃, the pH is adjusted to 5-6 with citric acid, and the reaction is maintained for 5-8 hours to obtain a microcapsule suspension. After washing with water, filtering and drying, a cooling microcapsule powder is obtained. Then, the cooling microcapsule powder is slowly added to the mixed solvent and stirred continuously at 500-600 r / min for 30-40 min. After filtration, a cooling microcapsule impregnation solution is obtained. Amino resin prepolymer (Luwipal 073 LF), supplied by BASF.

[0011] Furthermore, the mass ratio of sodium dodecylbenzenesulfonate, deionized water, and n-octadecane is (2-5):(95-98):(50-70); The mass ratio of ethanol, deionized water, Tween-80, fatty alcohol polyoxyethylene ether, sodium carboxymethyl cellulose, and sodium benzoate is (50-100):(750-850):(3-8):(2-5):(1-3):(0.3-0.7). The mass ratio of the porous silver nanowires, microcapsule emulsion, and amino resin prepolymer is (2-3):(150-180):(12-18). The ratio of the cooling microcapsule powder to the mixed solvent is (50-100) g : (800-1000) mL; The porous silver nanowires are hydrophobically treated, as follows: Soak porous silver nanowires in ethanol for 5-10 minutes, rinse with oxygen plasma, dry with nitrogen, then immerse in a 2-5 mmol / L thiol / ethanol solution and let stand at room temperature for 2-4 hours. After removal, rinse repeatedly with pure ethanol, then rinse with isopropanol, and finally dry with nitrogen.

[0012] As a further preferred embodiment of the present invention, the porous silver nanowires are prepared by the following method: 1) Add silver nitrate to ethanol, add hexadecyltrimethylammonium bromide, stir thoroughly, then add ammonium bicarbonate, and stir thoroughly at 30-32℃ until completely dissolved to obtain the precursor sol; 2) Transfer the precursor sol to a reaction vessel and react at 160-170℃ for 12-15h. After cooling to room temperature, centrifuge at 8000-12000r / min for 10-15min, wash repeatedly with ethanol, and dry at 60-70℃ for 2-5h to obtain the nanowire precursor. 3) Place the nanowire precursor in a tube furnace and heat it from room temperature to 350-380℃ at a heating rate of 3-5℃ / min under a mixed atmosphere of argon and hydrogen. Hold the temperature for 3-5 hours and then cool it to room temperature to obtain porous silver nanowires.

[0013] Furthermore, the ratio of silver nitrate, ethanol, hexadecyltrimethylammonium bromide, and ammonium bicarbonate is (2-5) mL : (30-50) mL : (0.3-0.7) g : (0.25-0.50) g; The silver nitrate has a concentration of 0.2-0.3 mol / L; The atmosphere is a mixture of argon and hydrogen, with a hydrogen gas fraction of 6-8%.

[0014] A method for preparing a hat sweatband includes the following steps: 1) Formulate strip-shaped skin-friendly sweat-absorbing layer, sponge layer and sweat-wicking layer; 2) Place the sponge layer between the skin-friendly sweat-absorbing layer and the sweat-wicking layer, then fold the two sides of the skin-friendly sweat-absorbing layer over and overlap them with the outer edge of the sweat-wicking layer; 3) Apply composite hot melt adhesive to the bonding surfaces of the skin-friendly sweat-absorbing layer and the sweat-wicking layer, and then heat-press to form a composite molding process, thus hot-melting and bonding the skin-friendly sweat-absorbing layer and the sweat-wicking layer together to obtain the desired hat sweatband.

[0015] Compared with the prior art, the beneficial effects of the present invention are: In this invention, the skin-friendly absorbent layer and the sponge layer of the sweatband are specially treated, so that the sweatband can continuously provide a cooling sensation when in direct contact with the skin, and it is quick-drying and moisture-wicking, avoiding sweat retention. This solves the problems of stuffiness, insufficient breathability, and lack of continuous cooling sensation in the head caused by hot or sports environments. At the same time, the special treatment of the composite hot melt adhesive used to heat-bond the skin-friendly absorbent layer and the sweat-wicking layer can effectively improve the stability of the sweatband's continuous cooling sensation, making it less likely for the substances loaded in the sponge layer to be lost, and enhancing the sweatband's washability and durability. Thus, the sweatband is durable and can provide continuous dryness, breathability, and cooling sensation to the head for a long time.

[0016] In the composite hot melt adhesive of this invention, melamine, a carbon nitride precursor, and β-cyclodextrin are first hydrothermally subjected to pre-assembly via hydrogen bonding. After calcination, porous nanosheets are obtained. These nanosheets are then used as a deposition matrix. Three-dimensional flower-shaped nano-titanium dioxide, synthesized from tetrabutyl titanate and acetic acid via hydrothermal method, is deposited onto the porous nanosheets. The protruding flower-shaped protrusions on the surface of the nano-titanium dioxide can be embedded into the pores of the porous nanosheets, forming a nanocomposite material with a high specific surface area. By incorporating the nanocomposite material into the hot melt adhesive, the high specific surface area of ​​the nanocomposite material forms a strong interaction with the polymer molecular chains in the hot melt adhesive, filling the micropores of the matrix, reducing stress concentration, and synergistically improving cohesion and interfacial adhesion. This helps to enhance the hot melt bonding effect and achieve a strong bond between the skin-friendly sweat-absorbing layer and the perspiration-wicking layer. Simultaneously, a precursor sol was formed by mixing silver nitrate, a metal precursor, with hexadecyltrimethylammonium bromide as a template agent and ammonium bicarbonate as a pore-forming agent. This sol was then subjected to a hydrothermal reaction to obtain a nanowire precursor. After heat treatment to create pores, the template agent and pore-forming agent thermally decomposed and volatilized, forming a porous structure within the nanowires, thus yielding porous silver nanowires. These nanowires were then impregnated with an ethanol dispersion of porous silver nanowires, allowing the porous silver nanowires to be fully adsorbed onto the surface of the hydrophilic fibers. Furthermore, the porous silver nanowires, due to the impregnation treatment, were effectively absorbed into the porous fibers. The nanowire ethanol dispersion does not contain binders. Therefore, after pure physical baking, the porous silver nanowires do not completely and firmly adhere to the surface of the hydrophilic fiber (this is because, when binders are present, baking causes the binders to form a film, thus completely "locking" the porous silver nanowires to the surface of the hydrophilic fiber; the binder can be a water-based polyurethane adhesive, water-based acrylate, etc.). Instead, one end forms an entangled cross-link with the hydrophilic fiber, while the other end forms a protruding "furry" structure on the surface of the hydrophilic fiber. During subsequent hot-melt bonding... The protruding "fluffy" structure not only embeds itself in the sweat-wicking layer and interlocks with the sweat-wicking yarns, allowing the porous silver nanowires to act as a connecting medium, linking the hydrophilic fibers in the skin-friendly sweat-wicking layer with the sweat-wicking yarns in the sweat-wicking layer, thus improving the bonding strength between the two layers and enhancing their adhesive strength. In addition to the hot-melt bonding effect of the composite hot-melt adhesive, the porous silver nanowires also provide a cross-linking connection, resulting in a more stable adhesive effect. This makes the sweatband less prone to cracking at the adhesive joints, ensuring durability. Furthermore, the protruding "fluffy" structure also embeds itself in the pores of the nanocomposite material in the composite hot-melt adhesive, forming a physical bond with the nanocomposite material. This inhibits the movement of the nanocomposite material, preventing the agglomeration caused by migration during hot-melt bonding, which leads to a decrease in adhesive strength. Moreover, the porous structure of the porous silver nanowires in the skin-friendly layer generates a significant capillary effect, significantly increasing the moisture absorption rate and enhancing the cooling effect.

[0017] Furthermore, using n-octadecane, a phase change material, as the core material and amino resin prepolymer as the wall material, and introducing hydrophobically treated porous silver nanowires into the wall material, cooling microcapsules were synthesized and dispersed in a prepared mixed solvent to obtain a cooling microcapsule impregnation solution. By immersing a highly elastic absorbent sponge in this solution and repeatedly squeezing and releasing it, the cooling microcapsules can penetrate into the pores of the sponge. Taking advantage of the fact that n-octadecane has a melting point of 28°C, close to the temperature of human skin, when in contact with human skin, the cooling effect is achieved. Octadecylane absorbs heat from the skin's surface and melts from a solid to a liquid state, thus lowering the skin's surface temperature and producing a real, gentle cooling sensation. When the ambient temperature decreases or heat dissipates, octadecylane solidifies again, releasing heat and creating a cyclical temperature control effect. This prevents the cooling sensation from being too strong or fleeting, achieving a good cooling effect. Furthermore, by introducing porous silver nanowires into the wall material, which intertwine and cross-link to form a mesh-like support structure, the strength of the wall material can be effectively improved, preventing cracking and thus effectively preventing... The loss of the core material, coupled with the hydrophobic treatment of the porous silver nanowires (a specific chemical reaction occurs between thiols and the surface of the silver nanowires, constructing a dense hydrophobic molecular layer on their surface, thereby altering surface wettability and achieving a hydrophobic effect), does not affect the hydrophobicity of the cooling microcapsule wall material. This ensures the wall material still possesses excellent moisture barrier properties, preventing sweat from entering the cooling microcapsules. Furthermore, the cross-linked network framework support structure formed by the porous silver nanowires in the wall material has a porous structure, which, combined with the porous structure of the porous silver nanowires themselves, ensures that the wall material... A highly porous mesh-like framework support structure is formed, enabling the permeation and transfer of gas and heat. This improves the breathability of the wall material, preventing stuffiness and dampness after impregnation, and balancing cooling and comfort. Furthermore, the mesh-like framework support structure, constructed from porous silver nanowires, forms a continuous thermally conductive mesh within the wall material, allowing heat to quickly pass through the capsule wall. Simultaneously, its porous structure provides a large specific surface area, creating a larger heat exchange area that can quickly absorb and conduct heat, thus enabling the cooling microcapsules to absorb heat and activate the cooling sensation more quickly. Furthermore, the porous silver nanowires introduced into the cooling microcapsule wall material are mainly encapsulated within the wall material matrix, with a small number of nanowire ends exposed on the surface. This ensures the structural integrity of the wall material while allowing for rapid heat transfer through the exposed ends, further enhancing the cooling feedback speed. Moreover, the exposed nanowire ends can form a stable bond with the rough pore walls of the sponge, better confining the cooling microcapsules within the sponge pores and preventing migration. Simultaneously, they act as a "skeleton," supporting the pore wall structure, reducing fatigue fracture, and improving the structural stability of the sponge after water absorption. This process avoids deformation. Simultaneously, during the impregnation treatment, most of the cooling microcapsules penetrate deep into the pores of the sponge structure, with a small portion remaining on the surface. The nanowire ends of these microcapsules, exposed on the wall material surface, penetrate into the skin-friendly absorbent and wicking layers, connecting with the hydrophilic fibers and wicking yarns. This creates a bond between the skin-friendly absorbent layer, the sponge layer, and the wicking layer, resulting in a stable bond strength and improved structural stability. This effectively prevents the sweatband from deforming during repeated washing, enhancing its aesthetic appeal. Detailed Implementation

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all 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.

[0019] In this embodiment of the invention, the hot melt adhesive is selected from polyamide hot melt adhesive; The hydrophilic fiber is selected from cotton-polyester blends; The moisture-wicking yarn is made from ordinary polyester.

[0020] Example 1 A hat sweatband includes a skin-friendly sweat-absorbing layer, a sponge layer, and a sweat-wicking layer; The specific preparation method includes the following steps: 1) Formulate strip-shaped skin-friendly sweat-absorbing layer, sponge layer and sweat-wicking layer; 2) Place the sponge layer between the skin-friendly sweat-absorbing layer and the sweat-wicking layer, then fold the two sides of the skin-friendly sweat-absorbing layer over and overlap them with the outer edge of the sweat-wicking layer; 3) Apply composite hot melt adhesive to the bonding surfaces of the skin-friendly sweat-absorbing layer and the sweat-wicking layer, and then hot-press to form a composite molding process, thus hot-melting and bonding the skin-friendly sweat-absorbing layer and the sweat-wicking layer together to obtain the desired hat sweatband. The composite hot melt adhesive has a solid content of 0.3 wt% and is obtained by adding nanocomposite materials to the hot melt adhesive and then dispersing and mixing them evenly through high-speed shearing. The skin-friendly and sweat-absorbing layer is made by immersing cleaned hydrophilic fibers in a porous silver nanowire ethanol dispersion for 5 minutes at room temperature, removing and squeezing out excess liquid, drying at 80°C for 5 minutes, baking at 100°C for 3 minutes, and then weaving. The porous silver nanowire ethanol dispersion has a solid content of 1 wt% and a PVP dispersant content of 0.1 wt%. The sponge layer is made by rinsing a high-elasticity absorbent sponge with clean water, squeezing it to remove water, and then immersing it completely in a cooling microcapsule impregnation solution. The process involves repeated squeezing and releasing five times, soaking and keeping it warm at room temperature for five minutes, then manually squeezing it to control the liquid content at 80%, and finally drying it. The moisture-wicking layer is woven from moisture-wicking yarn.

[0021] The preparation method of the above-mentioned nanocomposite materials is as follows: 1) Place 4g of melamine and 3mg of β-cyclodextrin in a container, add 60mL of deionized water, stir at 200r / min for 30min, then transfer to a hydrothermal reactor and place in an oven for hydrothermal reaction. The reaction conditions are 180℃ for 24h. After the reaction is completed, cool to room temperature, wash and dry thoroughly, then place in a muffle furnace and calcine at 550℃ for 4h. After cooling to room temperature, grind thoroughly to obtain porous nanosheets. 2) Place 5 mL of tetrabutyl titanate and 150 mL of acetic acid in a container, sonicate at 200 W for 50 min, add 3 g of porous nanosheets, sonicate for another 30 min, then transfer to a high-pressure reactor. Place the reactor in a drying oven and maintain a constant temperature of 150 °C for 10 h. After naturally cooling to room temperature, wash the reactor repeatedly with deionized water and anhydrous ethanol, dry at 75 °C for 10 h, and then place it in an annealing furnace for annealing at 350 °C for 3 h.

[0022] The preparation method of the cooling microcapsule impregnation solution is as follows: 1) Dissolve 2g of sodium dodecylbenzenesulfonate in 98g of deionized water, stir thoroughly, and heat to 40℃ to form an emulsion aqueous phase. Melt 50g of n-octadecane and slowly pour it into a container at 40℃ in a water bath to form an emulsion oil phase. Then pour the above emulsion aqueous phase into the emulsion oil phase and homogenize at 10000r / min for 3min to obtain a microcapsule emulsion. 2) Add 50g of ethanol to 750g of deionized water and mix thoroughly. Then, while stirring continuously at 300r / min, add 3g of Tween-80 and 2g of fatty alcohol polyoxyethylene ether in sequence. Stir for 10min and stir until fully dissolved. Then, add 1g of sodium carboxymethyl cellulose and stir at 600r / min for 20min. Then, add 0.3g of sodium benzoate and continue stirring for 5min. Add citric acid and adjust the pH to 6.5 to obtain a mixed solvent. 3) After hydrophobic treatment, 2g of porous silver nanowires were added to 150g of microcapsule emulsion. After ultrasonic dispersion, a mixed emulsion was obtained. Then, 12g of amino resin prepolymer was added, the temperature was raised to 70℃, the pH was adjusted to 5 with citric acid, and the reaction was maintained for 5h to obtain a microcapsule suspension. After washing with water, filtering and drying, a cooling microcapsule powder was obtained. Then, 50g of cooling microcapsule powder was slowly added to 800mL of mixed solvent and stirred continuously at 500r / min for 30min. After filtration, a cooling microcapsule impregnation solution was obtained.

[0023] The porous silver nanowires undergo hydrophobic treatment, specifically as follows: The porous silver nanowires were soaked in ethanol for 5 minutes, rinsed with oxygen plasma, dried with nitrogen, and then immersed in a 2 mmol / L thiol / ethanol solution. After standing at room temperature for 2 hours, they were removed, rinsed repeatedly with pure ethanol, rinsed with isopropanol, and dried with nitrogen.

[0024] The preparation method of porous silver nanowires is as follows: 1) Add 2 mL of 0.2 mol / L silver nitrate to 30 mL of ethanol, add 0.3 g of hexadecyltrimethylammonium bromide, stir thoroughly, then add 0.25 g of ammonium bicarbonate, and stir thoroughly at 30 °C until completely dissolved to obtain the precursor sol; 2) The precursor sol was transferred to a reaction vessel and reacted at 160℃ for 12 h. After cooling to room temperature, it was centrifuged at 8000 r / min for 10 min, washed repeatedly with ethanol, and dried at 60℃ for 2 h to obtain the nanowire precursor. 3) Place the nanowire precursor in a tube furnace and heat it from room temperature to 350°C at a heating rate of 3°C / min in a mixed atmosphere of argon and hydrogen with a hydrogen gas integral of 6%, hold it at that temperature for 3 hours, and then cool it to room temperature.

[0025] Example 2 A hat sweatband includes a skin-friendly sweat-absorbing layer, a sponge layer, and a sweat-wicking layer; The specific preparation method includes the following steps: 1) Formulate strip-shaped skin-friendly sweat-absorbing layer, sponge layer and sweat-wicking layer; 2) Place the sponge layer between the skin-friendly sweat-absorbing layer and the sweat-wicking layer, then fold the two sides of the skin-friendly sweat-absorbing layer over and overlap them with the outer edge of the sweat-wicking layer; 3) Apply composite hot melt adhesive to the bonding surfaces of the skin-friendly sweat-absorbing layer and the sweat-wicking layer, and then hot-press to form a composite molding process, thus hot-melting and bonding the skin-friendly sweat-absorbing layer and the sweat-wicking layer together to obtain the desired hat sweatband. The composite hot melt adhesive has a solid content of 0.5 wt% and is obtained by adding nanocomposite materials to the hot melt adhesive and then dispersing and mixing them evenly through high-speed shearing. The skin-friendly and sweat-absorbing layer is made by immersing cleaned hydrophilic fibers in a porous silver nanowire ethanol dispersion for 7 minutes at room temperature, removing and squeezing out excess liquid, drying at 83°C for 7 minutes, baking at 110°C for 4 minutes, and then weaving. The porous silver nanowire ethanol dispersion has a solid content of 1.5 wt% and a PVP dispersant content of 0.2 wt%. The sponge layer is made by rinsing a high-elasticity absorbent sponge with clean water, squeezing it to remove water, and then immersing it completely in a cooling microcapsule impregnation solution. The process involves repeated squeezing and releasing 8 times, soaking and keeping it warm at room temperature for 7 minutes, then manually squeezing it to control the liquid content to 90%, and finally drying it. The moisture-wicking layer is woven from moisture-wicking yarn.

[0026] The preparation method of the above-mentioned nanocomposite materials is as follows: 1) Place 5g of melamine and 7mg of β-cyclodextrin in a container, add 80mL of deionized water, stir at 250r / min for 40min, then transfer to a hydrothermal reactor and place in an oven for hydrothermal reaction. The reaction conditions are 183℃ for 28h. After the reaction is completed, cool to room temperature, wash and dry thoroughly, then place in a muffle furnace and calcine at 560℃ for 5h. After cooling to room temperature, grind thoroughly to obtain porous nanosheets. 2) Place 7 mL of tetrabutyl titanate and 200 mL of acetic acid in a container, sonicate at 250 W for 70 min, add 5 g of porous nanosheets, sonicate for another 40 min, then transfer to a high-pressure reactor. Place the reactor in a drying oven and maintain a constant temperature of 155 °C for 12 h. After naturally cooling to room temperature, wash the reactor repeatedly with deionized water and anhydrous ethanol, dry at 78 °C for 13 h, and then place it in an annealing furnace for annealing at 355 °C for 4 h.

[0027] The preparation method of the cooling microcapsule impregnation solution is as follows: 1) Dissolve 3g sodium dodecylbenzenesulfonate in 97g deionized water, stir thoroughly, and heat to 42℃ to form an emulsion aqueous phase. Melt 60g n-octadecane and slowly pour it into a container at 42℃ water bath to form an emulsion oil phase. Then pour the above emulsion aqueous phase into the emulsion oil phase and homogenize at 12000r / min for 4min to obtain a microcapsule emulsion. 2) Add 80g of ethanol to 800g of deionized water and mix thoroughly. Then, while stirring continuously at 400r / min, add 5g of Tween-80 and 3g of fatty alcohol polyoxyethylene ether in sequence. Stir for 13min until fully dissolved. Then, add 2g of sodium carboxymethyl cellulose and stir at 650r / min for 25min. Then, add 0.5g of sodium benzoate and continue stirring for 7min. Add citric acid and adjust the pH to 7.0 to obtain a mixed solvent. 3) After hydrophobic treatment, 2.5g of porous silver nanowires were added to 170g of microcapsule emulsion. After ultrasonic dispersion, a mixed emulsion was obtained. Then, 15g of amino resin prepolymer was added, the temperature was raised to 72℃, the pH was adjusted to 5.5 with citric acid, and the reaction was maintained for 7h to obtain a microcapsule suspension. After washing with water, filtering and drying, a cooling microcapsule powder was obtained. Then, 80g of cooling microcapsule powder was slowly added to 900mL of mixed solvent and stirred continuously at 550r / min for 35min. After filtration, a cooling microcapsule impregnation solution was obtained.

[0028] The porous silver nanowires undergo hydrophobic treatment, specifically as follows: The porous silver nanowires were soaked in ethanol for 7 minutes, rinsed with oxygen plasma, dried with nitrogen, and then immersed in a 3 mmol / L thiol / ethanol solution. After standing at room temperature for 3 hours, they were removed, rinsed repeatedly with pure ethanol, rinsed with isopropanol, and dried with nitrogen.

[0029] The preparation method of porous silver nanowires is as follows: 1) Add 3 mL of 0.2 mol / L silver nitrate to 40 mL of ethanol, add 0.5 g of cetyltrimethylammonium bromide, stir thoroughly, then add 0.35 g of ammonium bicarbonate, and stir thoroughly at 31 °C until completely dissolved to obtain the precursor sol; 2) The precursor sol was transferred to a reaction vessel and reacted at 165℃ for 13 h. After cooling to room temperature, it was centrifuged at 10000 r / min for 13 min, washed repeatedly with ethanol, and dried at 65℃ for 3 h to obtain the nanowire precursor. 3) Place the nanowire precursor in a tube furnace and heat it from room temperature to 370°C at a heating rate of 4°C / min in a mixed atmosphere of argon and hydrogen with a hydrogen gas integral of 7%, hold it at that temperature for 4 hours, and then cool it to room temperature.

[0030] Example 3 A hat sweatband includes a skin-friendly sweat-absorbing layer, a sponge layer, and a sweat-wicking layer; The specific preparation method includes the following steps: 1) Formulate strip-shaped skin-friendly sweat-absorbing layer, sponge layer and sweat-wicking layer; 2) Place the sponge layer between the skin-friendly sweat-absorbing layer and the sweat-wicking layer, then fold the two sides of the skin-friendly sweat-absorbing layer over and overlap them with the outer edge of the sweat-wicking layer; 3) Apply composite hot melt adhesive to the bonding surfaces of the skin-friendly sweat-absorbing layer and the sweat-wicking layer, and then hot-press to form a composite molding process, thus hot-melting and bonding the skin-friendly sweat-absorbing layer and the sweat-wicking layer together to obtain the desired hat sweatband. The composite hot melt adhesive has a solid content of 0.8 wt% and is obtained by adding nanocomposite materials to the hot melt adhesive and then dispersing and mixing them evenly through high-speed shearing. The skin-friendly and sweat-absorbing layer is made by immersing cleaned hydrophilic fibers in a porous silver nanowire ethanol dispersion for 10 minutes at room temperature, removing and squeezing out excess liquid, drying at 85°C for 10 minutes, baking at 120°C for 5 minutes, and then weaving. The porous silver nanowire ethanol dispersion has a solid content of 2 wt% and a PVP dispersant content of 0.2 wt%. The sponge layer is made by rinsing a high-elasticity absorbent sponge with clean water, squeezing it to remove water, and then immersing it completely in a cooling microcapsule impregnation solution. The sponge is repeatedly squeezed and released 10 times, then soaked and kept warm at room temperature for 10 minutes, and then squeezed manually to control the liquid retention rate to 100%. Finally, it is dried. The moisture-wicking layer is woven from moisture-wicking yarn.

[0031] The preparation method of the above-mentioned nanocomposite materials is as follows: 1) Place 7g of melamine and 10mg of β-cyclodextrin in a container, add 100mL of deionized water, stir at 300r / min for 50min, then transfer to a hydrothermal reactor and place in an oven for hydrothermal reaction. The reaction conditions are 185℃ for 30h. After the reaction is completed, cool to room temperature, wash and dry thoroughly, then place in a muffle furnace and calcine at 580℃ for 6h. After cooling to room temperature, grind thoroughly to obtain porous nanosheets. 2) Place 10 mL of tetrabutyl titanate and 250 mL of acetic acid in a container, sonicate at 300 W for 80 min, add 8 g of porous nanosheets, sonicate for another 50 min, then transfer to a high-pressure reactor. Place the reactor in a drying oven and maintain a constant temperature of 160 °C for 13 h. After naturally cooling to room temperature, wash the reactor repeatedly with deionized water and anhydrous ethanol, dry at 80 °C for 15 h, and then place it in an annealing furnace for annealing at 360 °C for 5 h.

[0032] The preparation method of the cooling microcapsule impregnation solution is as follows: 1) Dissolve 5g sodium dodecylbenzenesulfonate in 95g deionized water, stir thoroughly, and heat to 43℃ as the emulsion aqueous phase. Melt 70g n-octadecane and slowly pour it into a container at 45℃ water bath as the emulsion oil phase. Then pour the above emulsion aqueous phase into the emulsion oil phase and homogenize at 15000r / min for 5min to obtain microcapsule emulsion. 2) Add 100g of ethanol to 850g of deionized water and mix thoroughly. Then, while stirring continuously at 500r / min, add 8g of Tween-80 and 5g of fatty alcohol polyoxyethylene ether in sequence. Stir for 15min until fully dissolved. Then, add 3g of sodium carboxymethyl cellulose and stir at 700r / min for 30min. Then, add 0.7g of sodium benzoate and continue stirring for 10min. Add citric acid and adjust the pH to 7.5 to obtain a mixed solvent. 3) After hydrophobic treatment, 3g of porous silver nanowires were added to 180g of microcapsule emulsion. After ultrasonic dispersion, a mixed emulsion was obtained. Then, 18g of amino resin prepolymer was added, the temperature was raised to 75℃, the pH was adjusted to 6 with citric acid, and the reaction was maintained for 8h to obtain a microcapsule suspension. After washing with water, filtering and drying, a cooling microcapsule powder was obtained. Then, 100g of cooling microcapsule powder was slowly added to 1000mL of mixed solvent and stirred continuously at 600r / min for 40min. After filtration, a cooling microcapsule impregnation solution was obtained.

[0033] The porous silver nanowires undergo hydrophobic treatment, specifically as follows: The porous silver nanowires were soaked in ethanol for 10 min, rinsed with oxygen plasma, dried with nitrogen, and then immersed in a 5 mmol / L thiol / ethanol solution. After standing at room temperature for 4 h, they were taken out, rinsed repeatedly with pure ethanol, rinsed with isopropanol, and dried with nitrogen.

[0034] The preparation method of porous silver nanowires is as follows: 1) Add 5 mL of 0.3 mol / L silver nitrate to 50 mL of ethanol, add 0.7 g of cetyltrimethylammonium bromide, stir thoroughly, then add 0.50 g of ammonium bicarbonate, and stir thoroughly at 32 °C until completely dissolved to obtain the precursor sol; 2) The precursor sol was transferred to a reaction vessel and reacted at 170℃ for 15 h. After cooling to room temperature, it was centrifuged at 12000 r / min for 15 min, washed repeatedly with ethanol, and dried at 70℃ for 5 h to obtain the nanowire precursor. 3) Place the nanowire precursor in a tube furnace and heat it from room temperature to 380°C at a heating rate of 5°C / min in a mixed atmosphere of argon and hydrogen with a hydrogen gas integral of 8%, hold it at that temperature for 5 hours, and then cool it to room temperature.

[0035] Comparative Example 1: This comparative example is basically the same as Example 1, except that the skin-friendly sweat-absorbing layer does not contain porous silver nanowires.

[0036] Comparative Example 2: This comparative example is basically the same as Example 1, except that the composite hot melt adhesive does not contain nanocomposite materials.

[0037] Comparative Example 3: This comparative example is basically the same as Example 1, except that the sponge layer does not contain cooling microcapsules.

[0038] Comparative Example 4: This comparative example is basically the same as Example 1, except that the cooling microcapsules do not contain porous silver nanowires.

[0039] Comparative Example 5 is basically the same as Example 1, except that silver nanowires are used instead of porous silver nanowires in the skin-friendly sweat-absorbing layer and the cooling microcapsules.

[0040] Control group: A cotton-polyester blend was used to obtain a skin-friendly and sweat-absorbing layer, while ordinary polyester textiles were used to obtain a sweat-wicking yarn. A high-elasticity absorbent sponge was placed directly between the skin-friendly and sweat-absorbing layer and the sweat-wicking layer. Then, the two sides of the skin-friendly and sweat-absorbing layer were folded over and overlapped with the outer edge of the sweat-wicking layer. Polyamide hot melt adhesive was applied to the bonding surface of the skin-friendly and sweat-wicking layers. The layers were then hot-pressed and bonded together to form a single unit.

[0041] Test experiment: Experiment 1 Hat sweatband samples were prepared using the methods provided in Examples 1-3, Comparative Examples 1-5, and the control group. The hat sweatband samples obtained in Examples 1-3 and Comparative Examples 1-5 were designated as experimental group AH, and the hat sweatband samples obtained in the control group were designated as experimental group I. According to the national standard GB / T35263-2017 "Test and Evaluation of Instantaneous Cooling Performance of Textiles," the hat sweatband samples from experimental groups AH and I were placed on the cold plate of the instrument. When the hat sweatband sample and the cold plate came into contact, a hot plate was quickly placed on the hat sweatband sample (hot plate temperature 35℃). The heat from the hot plate was transferred through the hat sweatband sample to the cold plate. The maximum heat loss value of the hat sweatband sample could be measured at the instant of contact; this value is the Q-max value, expressed in W / cm². 2 The results of the comparative test of 100 sets of hat sweatband samples are shown in Table 1: Table 1 Experiment 2 To further verify the moisture absorption performance of the hat sweatband samples, the instantaneous temperature drop after moisture absorption and the moisture absorption rate were tested. The specific methods are as follows: Test method for instantaneous temperature drop ΔT (°C) after moisture absorption: In a constant temperature and humidity chamber, the temperature is controlled at 30°C and the humidity at 60% RH. The sweatband sample to be tested is fixed on simulated skin (artificial leather). Two high-precision thermocouples (0.1°C accuracy) are attached between the sweatband and the simulated skin for real-time temperature monitoring. 1 mL of artificial sweat is evenly dripped onto the surface of the sweatband, and the temperature is recorded at 0s, 30s, 40s, 50s, 1min, 3min, and 5min after the sweat is added. The temperature difference is calculated to determine the instantaneous temperature drop ΔT after moisture absorption. ΔT = Initial temperature (°C) before adding artificial sweat - Lowest temperature (°C) instantaneously (within 30s-1min) after adding sweat. Each sample was tested 5 times, and the average value was taken as the final ΔT result. The results are shown in Table 2.

[0042] Table 2 To further verify the durability of the hat sweatband sample, the sample was washed 200 times. Then, following the method in Experiment 1, the q-max value after washing was tested and compared with the initial value to calculate the cooling sensation retention rate (%) after washing. Cooling sensation retention rate after washing (%) = (initial value (Q-max) - value after washing (q-max)) / initial value (Q-max) × 100%, and the results are shown in Table 3.

[0043] Table 3 The experimental results above show that the hat sweatband of the present invention has the dual functions of moisture absorption and cooling, which allows the wearer to feel cool and comfortable. It can effectively solve the stuffiness in high temperature environments, and the cooling effect is long-lasting and can meet the needs of long-term wear.

[0044] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A head sweatband, characterized in that It includes a skin-friendly, sweat-absorbing layer, a sponge layer, and a sweat-wicking layer; The two sides of the skin-friendly and sweat-absorbing layer are folded over and overlapped with the outer surface edge of the sweat-wicking layer; The skin-friendly sweat-absorbing layer, the sweat-wicking layer, and the sponge layer are formed by hot pressing with composite hot melt adhesive; The composite hot melt adhesive is obtained by adding nanocomposite materials to hot melt adhesive and then dispersing and mixing them uniformly through high-speed shearing. The skin-friendly and sweat-absorbing layer is woven from hydrophilic fibers containing porous silver nanowires; The sponge layer is selected from a highly elastic absorbent sponge that has been treated with a cooling microcapsule impregnation solution; The wicking layer is woven from wicking yarn.

2. A sweatband for a hat according to claim 1, characterised in that The skin-friendly and sweat-absorbing layer is made by immersing the cleaned hydrophilic fibers in a porous silver nanowire ethanol dispersion with a solid content of 1-2wt% for 5-10 minutes at room temperature, removing them, squeezing out the excess liquid, drying them at 80-85℃ for 5-10 minutes, baking them at 100-120℃ for 3-5 minutes, and then weaving them. The porous silver nanowire ethanol dispersion also contains 0.1-0.2 wt% of dispersant PVP; The sponge layer is made by rinsing the high-elasticity absorbent sponge with clean water, squeezing out the water, and then completely immersing it in the cooling microcapsule impregnation liquid. The squeezing and releasing is repeated 5-10 times. After soaking and keeping warm at room temperature for 5-10 minutes, it is then squeezed manually to control the liquid retention rate to 80-100%, and then dried. The content of nanocomposite material in the composite hot melt adhesive is 0.3-0.8 wt%.

3. A sweatband for a hat according to claim 1, wherein The hot melt adhesive is selected from one of polyamide hot melt adhesive, thermoplastic polyurethane hot melt adhesive, and copolyester hot melt adhesive; The hydrophilic fiber is selected from one of pure cotton, cotton-polyester blend, hydrophilic modified polyester, and hydrophilic modified nylon; The moisture-wicking yarn is selected from one of ordinary polyester, polypropylene, and nylon.

4. A sweatband for a hat according to claim 1, wherein The nanocomposite material is prepared by the following method: 1) Melamine and β-cyclodextrin are placed in a container, deionized water is added, and the mixture is stirred at 200-300 r / min for 30-50 min. Then, it is transferred to a hydrothermal reactor and placed in an oven for hydrothermal reaction for 24-30 h. After the reaction is completed, it is cooled to room temperature, thoroughly washed and dried, and then calcined in a muffle furnace for 4-6 h. After cooling to room temperature, it is thoroughly ground to obtain porous nanosheets. 2) Place tetrabutyl titanate and acetic acid in a container, sonicate for 50-80 min, add porous nanosheets, sonicate for another 30-50 min, then transfer to a high-pressure reactor. Place the reactor in a drying oven and maintain a constant temperature of 150-160℃ for 10-13 h. After naturally cooling to room temperature, wash with deionized water and ethanol alternately, dry at 75-80℃ for 10-15 h, and then anneal in an annealing furnace for 3-5 h to obtain the nanocomposite material.

5. A hat sweatband according to claim 4, characterized in that, The ratio of melamine, β-cyclodextrin, and deionized water is (4-7) g: (3-10) mg: (60-100) mL; The hydrothermal reaction is carried out at a temperature of 180-185℃. The calcination temperature is 550-580℃; The ratio of tetrabutyl titanate, acetic acid, and porous nanosheets is (5-10) mL: (150-250) mL: (3-8) g; The ultrasonic treatment has a power of 200-300W; The annealing process is performed at a temperature of 350-360℃.

6. A hat sweatband according to claim 1, characterized in that, The cooling microcapsule impregnation solution is prepared as follows: 1) Dissolve sodium dodecylbenzenesulfonate in deionized water, stir thoroughly, and heat to 40-43℃ to form an emulsion aqueous phase. Melt n-octadecane and slowly pour it into a container with a water bath at 40-45℃ to form an emulsion oil phase. Then pour the above emulsion aqueous phase into the emulsion oil phase and homogenize and emulsify at 10000-15000r / min for 3-5min to obtain a microcapsule emulsion. 2) Add ethanol to deionized water and mix thoroughly. While stirring continuously at 300-500 rpm, add Tween-80 and fatty alcohol polyoxyethylene ether in sequence. Stir for 10-15 minutes until fully dissolved. Then add sodium carboxymethyl cellulose and stir at 600-700 rpm for 20-30 minutes. Add sodium benzoate and continue stirring for 5-10 minutes. Add citric acid and adjust the pH to 6.5-7.5 to obtain a mixed solvent. 3) After hydrophobic treatment, porous silver nanowires are added to the microcapsule emulsion and ultrasonically dispersed to obtain a mixed emulsion. Then, amino resin prepolymer is added, the temperature is raised to 70-75℃, the pH is adjusted to 5-6 with citric acid, and the reaction is maintained for 5-8 hours to obtain a microcapsule suspension. After washing with water, filtering and drying, a cooling microcapsule powder is obtained. Then, the cooling microcapsule powder is slowly added to the mixed solvent and stirred continuously at 500-600 r / min for 30-40 min. After filtration, a cooling microcapsule impregnation solution is obtained.

7. A hat sweatband according to claim 6, characterized in that, The mass ratio of sodium dodecylbenzenesulfonate, deionized water, and n-octadecane is (2-5):(95-98):(50-70); The mass ratio of ethanol, deionized water, Tween-80, fatty alcohol polyoxyethylene ether, sodium carboxymethyl cellulose, and sodium benzoate is (50-100):(750-850):(3-8):(2-5):(1-3):(0.3-0.7). The mass ratio of the porous silver nanowires, microcapsule emulsion, and amino resin prepolymer is (2-3):(150-180):(12-18). The ratio of the cooling microcapsule powder to the mixed solvent is (50-100) g : (800-1000) mL; The porous silver nanowires are hydrophobically treated, as follows: Soak porous silver nanowires in ethanol for 5-10 minutes, rinse with oxygen plasma, dry with nitrogen, then immerse in a 2-5 mmol / L thiol / ethanol solution and let stand at room temperature for 2-4 hours. After removal, rinse repeatedly with pure ethanol, then rinse with isopropanol, and finally dry with nitrogen.

8. A hat sweatband according to any one of claims 1-7, characterized in that, The porous silver nanowires are prepared by the following method: 1) Add silver nitrate to ethanol, add hexadecyltrimethylammonium bromide, stir thoroughly, then add ammonium bicarbonate, and stir thoroughly at 30-32℃ until completely dissolved to obtain the precursor sol; 2) Transfer the precursor sol to a reaction vessel and react at 160-170℃ for 12-15h. After cooling to room temperature, centrifuge at 8000-12000r / min for 10-15min, wash repeatedly with ethanol, and dry at 60-70℃ for 2-5h to obtain the nanowire precursor. 3) Place the nanowire precursor in a tube furnace and heat it from room temperature to 350-380℃ at a heating rate of 3-5℃ / min under a mixed atmosphere of argon and hydrogen. Hold the temperature for 3-5 hours and then cool it to room temperature to obtain porous silver nanowires.

9. A hat sweatband according to claim 8, characterized in that, The ratio of silver nitrate, ethanol, hexadecyltrimethylammonium bromide, and ammonium bicarbonate is (2-5) mL : (30-50) mL : (0.3-0.7) g : (0.25-0.50) g; The silver nitrate has a concentration of 0.2-0.3 mol / L; The atmosphere is a mixture of argon and hydrogen, with a hydrogen gas fraction of 6-8%.

10. A method for preparing a hat sweatband according to claim 1, characterized in that, Includes the following steps: 1) Formulate strip-shaped skin-friendly sweat-absorbing layer, sponge layer and sweat-wicking layer; 2) Place the sponge layer between the skin-friendly sweat-absorbing layer and the sweat-wicking layer, then fold the two sides of the skin-friendly sweat-absorbing layer over and overlap them with the outer edge of the sweat-wicking layer; 3) Apply composite hot melt adhesive to the bonding surfaces of the skin-friendly sweat-absorbing layer and the sweat-wicking layer, and then heat-press to form a composite molding process, thus hot-melting and bonding the skin-friendly sweat-absorbing layer and the sweat-wicking layer together to obtain the desired hat sweatband.

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