Moisture-absorbing, quick-drying and breathable fabric and preparation method thereof

Abstract

A cross-shaped hollow-structure nylon fiber is prepared through a special-shaped spinneret plate, a micro-through-hole breathable network is constructed in combination with metal wire wrapping, and the moisture-absorbing, quick-drying and breathable fabric is prepared by matching with the synergistic effect of PU film gradient compounding and SiO2 modified polyester and utilizing a hollow fiber static air layer and metal wire radiant heat reflection technology. The air permeability and the heat resistance of the composite fabric are improved, the contradiction between air permeability and heat preservation of a traditional film composite fabric is broken through, the balance of dynamic moisture removal and static heat preservation is achieved, and the defect that in the prior art, after film compounding is conducted on a moisture-absorbing and quick-drying breathable fabric, the air permeability and the heat preservation performance are insufficient is overcome; after the silver wires and the modified nylon fibers are combined, a multi-layer structure is formed, a static air layer in the modified nylon fibers has good heat insulation performance, the heat insulation effect is further enhanced through wrapping of the silver wires, heat can be prevented from being conducted through the fibers through high reflectivity of the silver wires, and the heat retention property is improved.

Description

Technical Field

[0001] This invention relates to a layered fabric, and more particularly to a moisture-wicking, quick-drying, and breathable fabric and its preparation method. Background Technology

[0002] Moisture-wicking and breathable fabric is a functional textile fabric that, through special materials and structural design, can quickly absorb human sweat, spread it to the fabric surface and accelerate evaporation, while maintaining air circulation, thereby keeping the skin dry and comfortable.

[0003] PU film is a functional film material made primarily of polyurethane. It possesses excellent waterproof, breathable, elastic, and chemical-resistant properties, and is widely used in clothing, medical, and industrial fields. While quick-drying fabrics rely on the capillary effect of fibers to wick away moisture, the hydrophobicity of the PU film interferes with this process, causing sweat to accumulate at the membrane-fabric interface, creating a "moisture resistance effect." This indirectly reduces perceived breathability. Furthermore, the membrane makes the fabric structure more compact, reducing the microenvironment where stagnant air can be trapped. Since stagnant air is a natural insulating medium, its reduction directly leads to a decrease in warmth retention.

[0004] Therefore, it is necessary to improve the existing methods for preparing moisture-wicking, quick-drying, and breathable fabrics to solve the above problems. Summary of the Invention

[0005] This invention overcomes the shortcomings of the prior art and provides a moisture-wicking, quick-drying, and breathable fabric and its preparation method, aiming to solve the defects of insufficient breathability and warmth retention of the existing moisture-wicking, quick-drying, and breathable fabric after membrane lamination.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a method for preparing a moisture-wicking, quick-drying, and breathable fabric, characterized by comprising the following steps:

[0007] S1: The nylon spinning solution is wet-spun through a shaped spinneret to obtain modified nylon fibers with a cross-shaped outer contour and a hollow structure.

[0008] S2: The polyester spinning solution is wet-spun, and after being ejected from the spinneret, it is placed in a silica solution for 2-3 hours to obtain primary modified polyester fiber.

[0009] S3: Immerse the modified polyester fiber in S2 in a sodium hydroxide solution with a concentration of 8-10% for 6-8 hours, and take it out to obtain secondary modified polyester fiber. Wrap the modified nylon fiber with metal wire to obtain wrapped nylon fiber.

[0010] S4: weaving the nylon fiber in the S3 as warp fibers to obtain an inner layer fabric, weaving the secondary modified polyester fiber in the S3 as warp fibers to obtain an outer layer fabric, and hot pressing the outer layer fabric, a PU film and the inner layer fabric in the order from outside to inside to obtain a moisture absorption and quick drying breathable fabric.

[0011] In a preferred embodiment of the present application, the transverse part and the longitudinal part of the cross-shaped outer contour in the S1 are consistent in length and width, the ratio of the length to the width of the cross arm is 4-6:1, and the width of the cross arm is 0.2-0.4 mm.

[0012] In a preferred embodiment of the present application, the hollow structure in the S1 is located at the intersection of the transverse part and the longitudinal part, the hollow structure is coaxially arranged with the modified nylon fiber, and the cross section of the hollow structure is circular with a diameter of 0.1-0.2 mm.

[0013] In a preferred embodiment of the present application, the content of PA6 in the nylon spinning solution in the S1 is 25-30 wt%, the solvent is a formic acid / water mixture with a volume ratio of 7:3, and the viscosity is 1500-2000 mPa·s.

[0014] In a preferred embodiment of the present application, the content of PET in the polyester spinning solution in the S2 is 25-30 wt%, the solvent is a trifluoroacetic acid / dichloromethane mixture with a volume ratio of 3:1, the viscosity is 2500-3000 mPa·s, and the diameter of the spinneret is 0.1-0.3 mm.

[0015] In a preferred embodiment of the present application, the concentration of silica particles in the silica solution in the S2 is 10-15 wt%, the solvent is an ethanol aqueous solution with a volume ratio of 1:1, the particle size of the silica is 20-50 nm, and the silica solution contains 0.2 wt% of KH550.

[0016] In a preferred embodiment of the present application, the metal wire in the S3 is a silver wire with a diameter of 2-4 μm, and the wrapping density of the metal wire is 8-12 twists / cm, and the wrapping tension is 0.8-1.2 cN / dtex.

[0017] In a preferred embodiment of the present application, the inner layer fabric in the S4 is a plain weave with a warp density of 600 ends / 10 cm and a weft density of 450 ends / 10 cm, and the outer layer fabric is a 2 / 2 twill weave with a warp density of 500 ends / 10 cm and a weft density of 380 ends / 10 cm.

[0018] In a preferred embodiment of the present application, the temperature of the hot-pressing compounding in S4 is 160-200 DEG C, the pressure is 1.5-2.5 MPa, the linear speed is 1.5 m / min, the cooling temperature is 15 DEG C, and the mass ratio among the outer fabric, the PU film and the inner fabric is 4.5-5.5:2-3:5-6.

[0019] To achieve the above-mentioned purpose, the second technical scheme adopted by the present application is a moisture-absorbing, quick-drying and breathable fabric prepared based on a preparation method of a moisture-absorbing, quick-drying and breathable fabric.

[0020] The present application solves the defects in the background art and has the following beneficial effects:

[0021] (1) The present application provides a preparation method of a moisture-absorbing, quick-drying and breathable fabric, which prepares cross-shaped hollow structure nylon fibers through a special-shaped spinneret, constructs a micro-porous and breathable network by combining with a metal wire wrapping, and cooperates with the synergistic effect of PU film gradient compounding and SiO2 modified polyester to improve the air permeability and thermal resistance of the composite fabric, break through the contradiction between the air permeability and thermal resistance of the traditional film composite fabric, realize the balance between dynamic moisture removal and static heat preservation, and solve the defects of the air permeability and thermal resistance of the moisture-absorbing, quick-drying and breathable fabric in the prior art after film compounding.

[0022] (2) In the present application, the cross-shaped outer contour increases the contact area between the fibers and the surrounding environment, and the edge part is more likely to form more micro gaps and pores between the fibers, compared with the prior art, these gaps and pores constitute a complex air flow network, which is conducive to the rapid flow of air, thereby improving the overall air permeability of the fabric.

[0023] (3) In the present application, the silver wire and the modified nylon fiber form a multi-layer structure after being combined, compared with the prior art, the static air layer inside the modified nylon fiber itself has good heat insulation performance, and the wrapping of the silver wire further enhances this heat insulation effect, the high reflectivity of the silver wire can prevent heat conduction through the fiber, so that the warmth layer can better capture heat and improve the warmth.

[0024] (4) In the present application, the cross-shaped nylon fiber constitutes a mechanical support frame, which resists the pressure of the PU film during hot-pressing compounding, and the four protruding corners can support the silver wire wrapping layer to prevent the micro-porous holes from collapsing, compared with the prior art, the hollow pores are kept intact due to the high rigidity of the cross-shaped nylon shell, which can improve the mechanical properties of the fiber, increase the pore retention rate after washing, avoid the air permeability decay of the film composite fabric caused by fiber deformation, and further ensure the durability of the air permeability and warmth performance in long-term use.

[0025] (5) In the application, the static air layer stored in the cross-shaped hollow fiber inhibits heat conduction and convection to block heat loss, and the silver wire wrapping reflects human body radiant heat back to the hollow cavity to form a heat trap, and the static air layer converts the heat reflected by the silver wire into molecular kinetic energy but cannot be quickly conducted out, compared with the prior art, the two cover the three heat transfer paths of conduction, convection and radiation, increase the heat preservation rate, and completely solve the technical contradiction that moisture permeability and warmth retention cannot be compatible. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings described below are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0027] Figure 1 The method steps of the preferred embodiment of the present application are shown in the figure. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0029] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, therefore, the scope of protection of the present application is not limited by the specific embodiments disclosed below.

[0030] In the description of the present application, the terms "first", "second", etc. are only used for description purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second", etc. can be explicitly or implicitly included one or more features. In the description of the present application, unless otherwise specified, the meaning of "multiple" is two or more.

[0031] The thickness of the PU film in the present application is 20 microns, the porosity is 30%, and the pore size is 0.5 microns.

[0032] As shown in Figure 1 A preparation method of a moisture-absorbing and quick-drying breathable fabric, comprising the following steps:

[0033] S1: The nylon spinning solution is wet spun through a special spinneret to obtain modified nylon fibers with a cross-shaped outer contour and a hollow structure.

[0034] S2: The polyester spinning solution is wet spun, and after being sprayed from the spinneret, it is placed in a silica solution for 2-3 hours to obtain a first modified polyester fiber. The polyester spinning solution is sprayed and then placed in a silica solution, and silica particles will adhere to the surface of the polyester fiber, increasing the specific surface area and roughness of the fiber, thereby improving the hydrophilicity of the polyester fiber and overcoming the poor moisture absorption of the polyester fiber. This facilitates the absorption and conduction of sweat, allowing it to be transferred more quickly from the skin surface to the fabric surface. The treatment with the silica solution forms a certain amount of microporous structure on the surface of the fiber, which helps air circulation, thereby enhancing the air permeability of the polyester fiber and supporting the subsequent improvement of the air permeability of the composite fabric.

[0035] S3: The modified polyester fiber in S2 is soaked in a sodium hydroxide solution with a concentration of 8-10% for 6-8 hours, and after being removed, a second modified polyester fiber is obtained. The modified nylon fiber is wrapped with a metal wire to obtain a wrapped nylon fiber. This hollow structure increases the internal voids of the nylon fiber, which is beneficial for air storage, thereby improving the warmth retention performance of the fabric. At the same time, the hollow structure is also conducive to air circulation, further enhancing the air permeability. After the modified polyester fiber is treated with an alkali solution, the silica particles on its surface react with the alkali solution, forming more micropores and rough structures, which further enhance the moisture absorption and air permeability of the polyester fiber.

[0036] The modified nylon fiber is wrapped with a metal wire, which constructs a micro-porous air-permeable network on the surface of the nylon fiber. These micro-pores provide more channels for gas circulation, greatly improving the air permeability of the fabric and accelerating the speed of sweat evaporation and air exchange. At the same time, the metal wire also has certain electrical conductivity, which can reduce the generation of static electricity and improve the comfort of wearing.

[0037] S4: The wrapped nylon fiber in S3 is used as a warp fiber to weave an inner layer fabric, and the second modified polyester fiber in S3 is used as a warp fiber to weave an outer layer fabric. The weft fibers in both the inner layer fabric and the outer layer fabric are 50S cotton fibers. The outer layer fabric, a PU film, and the inner layer fabric are hot-pressed in the order from the outside to the inside to obtain a moisture-absorbing, quick-drying, and air-permeable fabric.

[0038] The wrapped nylon fiber is used as a warp fiber to weave an inner layer fabric, and the second modified polyester fiber is used as a warp fiber to weave an outer layer fabric. Both the inner layer fabric and the outer layer fabric use plain weave and 2 / 2 twill weave, respectively, which provides a good basis for subsequent hot-pressing and enhances the overall performance of the composite fabric.

[0039] The outer layer fabric, PU film and inner layer fabric are combined together in the order from outside to inside through the hot pressing composite process, forming a composite fabric. The addition of PU film forms a waterproof and moisture-permeable barrier inside the fabric, which can prevent external moisture from penetrating to the inner layer, while allowing sweat to be discharged in the form of water vapor, realizing the function of waterproof and moisture permeability. This multi-layer composite structure integrates moisture absorption, quick drying, ventilation, warmth, waterproof and moisture permeability, etc., meeting the comprehensive requirements of clothing performance in different environmental conditions.

[0040] The cross-shaped hollow structure nylon fiber is prepared by using a special-shaped spinneret, and a micro-porous ventilation network is constructed by wrapping metal wires. Combined with the gradient composite of PU film and the synergistic effect of SiO2 modified polyester, the composite fabric is improved in ventilation and thermal resistance by using the static air layer of hollow fiber and the radiation heat reflection technology of metal wire, breaking through the contradiction between ventilation and warmth of traditional membrane composite fabric, realizing the balance between dynamic moisture removal and static heat preservation, and solving the defects of insufficient ventilation and warmth of moisture absorption, quick drying and ventilation fabric after membrane composite in the prior art.

[0041] PU film is a thin film with microporous structure. The size of these micropores is small enough to effectively prevent the invasion of liquid water and prevent external rainwater and other liquids from penetrating the fabric, keeping the wearer dry. PU film has good flexibility and elasticity, which can closely fit with the fabric, and will not crack or fall off when the composite fabric is subjected to external forces such as stretching and bending, thereby ensuring the overall performance and service life of the composite fabric.

[0042] The surface of the second modified polyester fiber is rough and porous, and these microporous structures increase the specific surface area of the fiber, making air flow more easily between the fibers. During the weaving of the outer layer fabric, these micropores and the ventilation channels of the modified nylon fiber are interconnected, forming a complete ventilation network, further enhancing the ventilation performance of the composite fabric, and reducing the negative impact of the limited ventilation of the PU film.

[0043] The hollow structure increases the air content inside the fiber, which can flow freely to form ventilation channels. In the composite structure, the modified nylon fiber provides a diffusion path for water vapor after sweat evaporation, allowing it to quickly reach the surface of the PU film. The surface microporous structure treated by silicon dioxide increases the ventilation of the fiber, making air flow more easily between the fibers to form a ventilation network. During the weaving of the outer layer fabric, these micropores and the ventilation channels of the modified nylon fiber are interconnected, further enhancing the ventilation performance.

[0044] The air permeable channels formed by the modified nylon fibers and the secondarily modified polyester fibers cooperate with each other, so that air and water vapor can flow efficiently inside the fabric, making up for the problem of insufficient air permeability of the PU film. This synergy ensures that the composite fabric can effectively discharge sweat while maintaining waterproof performance, thereby improving air permeability.

[0045] The transverse part of the cross-shaped outer contour in S1 is consistent in length with the longitudinal part, and the transverse part is consistent in width with the longitudinal part, the ratio of the length to the width of the cross arm is 4-6:1, and the width of the cross arm is 0.2-0.4mm. The length of the cross arm is the distance between the tip of the fiber cross section and the center of the cross, and the width of the cross arm is the dimension perpendicular to the length of the cross arm. The unique shape of the cross-shaped nylon part can form special air permeable channels in the fiber assembly during subsequent compounding with other materials and weaving. The transverse and longitudinal parts are connected to each other and consistent in length and width, so that these channels have good continuity and uniformity in different directions, which is beneficial to the circulation of air inside the fabric, thereby enhancing the air permeability.

[0046] The cross-shaped structure of the fiber is beneficial to the construction of micro reflecting surfaces inside the fabric after compounding with other materials. When heat is radiated outward in the form of infrared rays, these reflecting surfaces can reflect part of the heat, reduce the loss of heat, and enhance the warmth retention effect of the fabric. It provides a good basis for subsequent wrapping of the modified nylon fiber with metal wire. The metal wire can be uniformly wrapped in all directions of the cross-shaped fiber, forming a more stable wrapping structure, further enhancing the mechanical properties and durability of the fiber, and ensuring the stable performance of the air permeability and warmth retention in the use process.

[0047] The cross-shaped outer contour increases the contact area of the fiber with the surrounding environment, and the edge part is more likely to form more micro gaps and pores between the fibers, which constitute a complex air flow network, which is beneficial to the rapid flow of air, thereby improving the overall air permeability of the fabric.

[0048] In a dynamic wearing environment, when the human body generates heat and moisture during activity, the cross-shaped nylon fiber and the hollow structure formed thereby can quickly discharge moisture, and at the same time cooperate with the micro-porous air permeable network constructed by the metal wire and the moisture permeable function of the PU film to realize dynamic moisture discharge. In a static environment, the still air in the hollow structure and the heat reflection effect of the metal wire can also achieve good warmth retention effect, thereby realizing the dynamic balance of air permeability and warmth retention, and solving the problem that air permeability and warmth retention are difficult to balance in the prior art.

[0049] The hollow structure in S1 is located at the intersection of the transverse part and the longitudinal part, and is coaxially arranged with the modified nylon fiber. The hollow structure has a circular cross section and a diameter of 0.1-0.2 mm. The circular and small-diameter hollow structure is uniformly distributed, so that the warm air layer can exist more uniformly in the entire fiber, better ensuring the uniform distribution of the warm-keeping performance on the fabric, improving the overall warm-keeping effect, and solving the problem of insufficient warm-keeping performance of the fabric after film compounding.

[0050] The PA6 content in the nylon spinning solution in S1 is 25-30wt%, and also contains 1-3% of calcium chloride based on the total mass of the spinning solution. The solvent is a formic acid / water mixture with a volume ratio of 7:3, and the viscosity is 1500-2000 mPa·s. The coagulation bath is a 30-50wt% ethanol aqueous solution.

[0051] The viscosity of the nylon spinning solution is controlled at 1500-2000 mPa·s, which ensures the spinnability of the nylon fiber during the spinning process, forms a complete and stable composite fiber structure, and lays a good foundation for subsequent hollow processing and metal wire wrapping processes.

[0052] The PET content of the polyester spinning solution in S2 is 25-30wt%, the solvent is a trifluoroacetic acid / dichloromethane mixture with a volume ratio of 3:1, the viscosity is 2500-3000 mPa·s, and the jet hole diameter is 0.1-0.3 mm. The spun polyester fiber is treated in a silica solution, and silica particles will adhere to the surface of the fiber, increasing the specific surface area and surface roughness of the fiber, thereby improving the hydrophilicity of the polyester fiber. This makes it easier for sweat to be absorbed to the surface of the fiber and quickly conducted between the fibers, improving the moisture-wicking performance of the fabric.

[0053] The surface of the silica-treated polyester fiber is rough and porous, and these micropores and rough structures are superimposed on each other during weaving, forming air-permeable channels that facilitate air circulation inside the fabric. At the same time, the appropriate jet hole diameter and viscosity ensure the uniformity of the fiber fineness, making the air permeability of the fabric more uniform and consistent. The microporous structure formed after silica treatment can store more still air, which is a poor conductor of heat, can effectively prevent heat loss, and thus improve the warm-keeping performance of the fabric.

[0054] The concentration of silica particles in the silica solution in S2 is 10-15 wt%, the solvent is a 1:1 volume ratio ethanol water solution, the silica particle size is 20-50 nm, and the silica solution contains 0.2 wt% KH550. The concentration of silica particles is 10-15 wt%, and the solvent is a 1:1 volume ratio ethanol water solution. This solvent system can uniformly disperse the silica particles in the solution and effectively adhere to the surface of the polyester fiber. Silica particles have a high specific surface area and adsorption capacity, which can increase the hydrophilicity of the surface of the polyester fiber, making it easier to adsorb sweat on the surface of the skin, thereby improving the moisture absorption performance of the fabric.

[0055] After treatment with the silica solution, a stable hydrophilic layer is formed on the surface of the polyester fiber, which can maintain good moisture absorption performance during subsequent use. Even after multiple washes and wear, it is not easy to fall off or fail, thereby ensuring the long-term stable moisture absorption and sweat-wicking effect of the fabric. During weaving, the micropores between the silica-treated polyester fibers are interconnected to form a breathable network. This network structure helps air to circulate quickly inside the fabric, allowing sweat to evaporate and drain more quickly, improving the air permeability of the fabric.

[0056] The attachment of silica particles makes the surface of the polyester fiber rough, increasing the friction coefficient between the fibers, allowing the fibers to interweave more tightly during weaving, forming a thicker fabric structure. This thick fabric structure can store more still air, thereby improving the warmth retention performance.

[0057] The metal wire in S3 is a silver wire with a diameter of 2-4 μm, and the wrapping density of the metal wire is 8-12 twists / cm, and the wrapping tension is 0.8-1.2 cN / dtex. The silver wire has a small diameter, and after wrapping, it forms fine air-permeable channels on the surface of the nylon fiber. These small channels increase the flow area of air between the fibers, allowing oxygen and water vapor to pass more smoothly, thereby improving the air permeability of the entire fabric.

[0058] Silver wire has good electrical conductivity and thermal conductivity, and its surface can reflect part of the heat, reducing heat loss. This heat reflection helps to retain body heat and improve the warmth retention performance of the fabric. The silver wire is wrapped around the modified nylon fiber, forming a small air layer between the fiber. These air layers are similar to the static air layers in thermal insulation materials, which can effectively prevent heat transfer, further improving the warmth retention effect of the fabric.

[0059] The silver wire is combined with the modified nylon fiber to form a multi-layer structure. The static air layer inside the modified nylon fiber itself has good heat insulation performance, and the wrapping of the silver wire further enhances this heat insulation effect. The high reflectivity of the silver wire can prevent heat conduction through the fiber, so that the thermal insulation layer can better capture heat and improve thermal insulation.

[0060] The cross-shaped nylon fiber constitutes a mechanical support frame, which resists the pressure of the PU film during hot pressing and compounding. The four protruding corners can support the silver wire wrapping layer to prevent the micro-porous from collapsing. At the same time, the hollow pores are kept intact due to the high rigidity of the cross-shaped nylon shell, which can improve the mechanical properties of the fiber, increase the pore retention rate after washing, avoid the air permeability decay caused by fiber deformation of the film composite fabric, and further ensure the durability of the air permeability and thermal insulation performance in long-term use.

[0061] The static air layer inside the cross-shaped hollow fiber blocks heat loss by inhibiting heat conduction and convection, while the wrapped silver wire reflects the heat radiated by the human body back to the hollow cavity to form a heat trap. The static air layer converts the heat reflected by the silver wire into molecular kinetic energy but cannot be quickly conducted out. The two together cover the three heat transfer paths of conduction, convection, and radiation, increase the heat retention rate, and completely solve the technical contradiction between moisture permeability and thermal insulation.

[0062] In S4, the inner layer fabric is plain weave with a warp density of 600 ends / 10 cm and a weft density of 450 ends / 10 cm, and the outer layer fabric is 2 / 2 twill weave with a warp density of 500 ends / 10 cm and a weft density of 380 ends / 10 cm. The inner layer fabric adopts plain weave with a high density design of 600 ends / 10 cm and 450 ends / 10 cm, which makes the inner layer fiber arrangement compact and forms uniform air permeation channels. This compact structure is conducive to forming a stable air layer between the human body and the fabric, promoting rapid absorption and conduction of sweat, while ensuring the comfort and fit of the inner layer fabric when in contact with the skin.

[0063] The outer layer fabric adopts 2 / 2 twill weave with a design of 500 ends / 10 cm and 380 ends / 10 cm. The long floats of twill weave make the fabric surface smoother, reducing the air flow resistance and facilitating air circulation on the fabric surface. At the same time, this organizational structure ensures a certain air permeability while improving the strength and wear resistance of the outer layer fabric, making it better resist the influence of the external environment.

[0064] The high-density plain weave inner layer fabric can better fit the human skin, reduce air flow, and form a layer of warm air. At the same time, the combination of the inner layer fabric with the modified nylon fiber and the metal wire wrapped fiber utilizes the static air layer of the hollow fiber and the heat reflection characteristics of the metal wire to further improve the warmth retention performance of the inner layer. The 2 / 2 twill weave structure of the outer layer fabric can prevent the intrusion of external cold air to a certain extent, while allowing the internal hot air to slowly dissipate, thereby providing good warmth retention while maintaining air permeability.

[0065] The temperature of the hot pressing in S4 is 160-200℃, the pressure is 1.5-2.5MPa, the linear speed is 1.5m / min, the cooling temperature is 15℃, and the mass ratio between the outer layer fabric, the PU film and the inner layer fabric is 4.5-5.5:2-3:5-6. The hot pressing temperature is controlled in the range of 160-200℃, which can make the PU film fully soften and closely combine with the outer layer fabric and the inner layer fabric. In this temperature range, the bonding performance of the PU film is best, which can uniformly cover the surface of the fabric to form a continuous and dense waterproof and moisture-permeable layer, effectively preventing the intrusion of external moisture while allowing the internal water vapor to pass through.

[0066] A moisture-absorbing, quick-drying and breathable fabric is prepared based on a preparation method of a moisture-absorbing, quick-drying and breathable fabric.

[0067] Embodiment one: the embodiment provides a moisture-absorbing, quick-drying and breathable fabric, and the preparation method comprises the following steps:

[0068] S1: wet spinning nylon spinning solution through a special-shaped spinneret to obtain modified nylon fibers with a cross-shaped outer contour and a hollow structure; the PA6 content in the nylon spinning solution is 30wt%, the solvent is a formic acid / water mixture with a volume ratio of 7:3, the viscosity is 2000mPa·s, the cross-shaped outer contour has consistent length in the transverse and longitudinal directions, the cross-shaped outer contour has consistent width in the transverse and longitudinal directions, the ratio of the length to the width of the cross arm is 3:1, the width of the cross arm is 0.3mm, the hollow structure is located at the intersection of the transverse and longitudinal directions, the hollow structure is coaxially arranged with the modified nylon fiber, the cross-sectional shape of the hollow structure is circular with a diameter of 0.15mm, and the modified nylon fiber is obtained;

[0069] S2: wet spinning polyester spinning solution, the PET content in the polyester spinning solution is 30wt%, the solvent is a trifluoroacetic acid / dichloromethane mixture with a volume ratio of 3:1, the viscosity is 2500mPa·s, the spinneret diameter is 0.2mm, the polyester spinning solution is placed in a silica solution for 3h after being sprayed from the spinneret, the silica particle concentration in the silica solution is 10wt%, the solvent is an ethanol / water solution with a volume ratio of 1:1, the silica particle size is 30nm, the silica solution contains 0.2wt% of KH550, and the first modified polyester fiber is obtained;

[0070] S3: The modified polyester fiber in S2 was soaked in a sodium hydroxide solution with a concentration of 9% for 8 hours, and then the secondary modified polyester fiber was obtained after being taken out. The modified nylon fiber was wrapped with a metal wire, the metal wire was a silver wire with a diameter of 2 μm, the wrapping density of the metal wire was 8 twists / cm, and the wrapping tension was 1.2 cN / dtex, thereby obtaining the wrapped nylon fiber;

[0071] S4: The wrapped nylon fiber in S3 was used as a warp fiber to weave, thereby obtaining an inner layer fabric, the inner layer fabric was a plain weave, the warp density was 600 ends / 10 cm, and the weft density was 450 ends / 10 cm. The secondary modified polyester fiber in S3 was used as a warp fiber to weave, thereby obtaining an outer layer fabric, the outer layer fabric was a 2 / 2 twill weave, the warp density was 500 ends / 10 cm, and the weft density was 380 ends / 10 cm. The weft yarns in the outer layer fabric and the inner layer fabric were both cotton fibers with a fineness of 50S. The outer layer fabric, the PU film, and the inner layer fabric were hot-pressed and combined in the order from outside to inside, the hot-pressing temperature was 180 ℃, the pressure was 2.0 MPa, the linear speed was 1.5 m / min, the cooling temperature was 15 ℃, and the mass ratio between the outer layer fabric, the PU film, and the inner layer fabric was 5:2.5:6, thereby obtaining a moisture-absorbing, quick-drying, and breathable fabric.

[0072] Example Two: The difference between this example and Example One is that the ratio of the length to the width of the cross arm is 4:1.

[0073] Example Three: The difference between this example and Example One is that the ratio of the length to the width of the cross arm is 5:1.

[0074] Example Four: The difference between this example and Example One is that the ratio of the length to the width of the cross arm is 6:1.

[0075] Example Five: The difference between this example and Example One is that the ratio of the length to the width of the cross arm is 7:1.

[0076] Example Six: The difference between this example and Example Three is that the diameter of the silver wire is 1 μm.

[0077] Example Seven: The difference between this example and Example Three is that the diameter of the silver wire is 3 μm.

[0078] Example Eight: The difference between this example and Example Three is that the diameter of the silver wire is 4 μm.

[0079] Example Nine: The difference between this example and Example Three is that the diameter of the silver wire is 5 μm.

[0080] Comparative Example One: S1: Polyester fibers with a diameter of 0.2 mm were used as warp fibers to weave, thereby obtaining an outer layer fabric.

[0081] S2: Weave nylon fibers with a fineness of 1.5D as warp fibers to obtain an inner layer fabric;

[0082] S3: The weft yarns in the outer layer fabric and the inner layer fabric are all 50S cotton fibers, the outer layer fabric in S1, the PU film and the inner layer fabric in S2 are hot-pressed and compounded in the order from outside to inside, the hot-pressing temperature is 180℃, the pressure is 2.0MPa, the linear speed is 1.5m / min, the cooling temperature is 15℃, the mass ratio between the outer layer fabric, the PU film and the inner layer fabric is 5:2.5:6, and a high water pressure moisture permeable moisture absorption and quick drying fabric is obtained.

[0083] Take samples of equal area from examples one to nine and comparative example one, respectively, to test the warmth retention and air permeability, the warmth retention is tested by GB / T35762-2017 flat plate method, and the air permeability is tested according to the national standard GB / T5453-1997 determination of air permeability of textile fabric, and the test data is shown in table one.

[0084] Table one: air permeability and warmth retention experimental data of examples one to nine and comparative example one

[0085] Data source Insulation rate (%) Air permeability (mm / s) Example one 28.2 1410.3 Example two 28.8 1423.7 Example three 29.6 1445.7 Example four 29.3 1436.3 Example five 29.0 1419.9 Example six 28.6 1430.4 Example seven 32.4 1458.1 Example eight 31.5 1425.3 Example nine 29.6 1418.7 Comparative example one Figure 1 23.2 1386.7

[0086] From table one, the warmth retention rate and air permeability of examples one to nine are all greater than those of comparative example one, and the application has advantages.

[0087] In examples one to five, as the ratio of cross arm length to width increases, the warmth retention and air permeability first increase and then decrease, because as the ratio of cross arm length to width increases, the contact area of fibers increases, the interlacing points between fibers increase, and the interlacing becomes more compact, thereby forming more micro warm-keeping areas, improving warmth retention, and appropriate ratio can maintain the stability and integrity of the hollow structure, the hollow part can store more still air, which is a good thermal insulation material, can effectively reduce the transfer of heat, thereby improving the warmth retention, but too large ratio will make the whole fiber rigid, reduce the flexibility and elasticity of the fiber. This will affect the fit between fibers, leading to discontinuous areas in the warm-keeping layer, and heat is easily lost from these areas, resulting in decreased warmth retention; as the ratio of cross arm length to width increases, the contact area between fibers increases, the interlacing becomes more compact, and the gap and channel between fibers become more uniform and orderly. This is conducive to air circulation, forming more micro air permeable channels, improving air permeability, when the ratio is too large, the interlacing between fibers is too tight, the gap is reduced, and the space for air circulation is small, which hinders the circulation of air, resulting in decreased air permeability. The preferred embodiment is example three.

[0088] In Example 3 and Examples 6 to 9, as the silver wire diameter increases, the warmth retention and air permeability first increase and then decrease. This is because as the silver wire diameter increases, the surface area of the silver wire increases, allowing more infrared radiation to be reflected, thereby reducing the loss of body heat, and the warmth retention is improved. At the same time, thicker silver wires can provide better support, making the micro-porous structure around the modified nylon fibers more stable, which helps maintain the integrity of the warmth retention layer. When the silver wire diameter increases to a certain extent, the overall flexibility and elasticity of the fibers will be affected. The fibers become rigid, causing the overall softness and fit of the fabric to decrease, which is not conducive to warmth retention. In addition, too thick silver wires can disrupt the uniformity of the fabric, causing uneven heat loss to increase; as the silver wire diameter increases, the space between the fibers also increases, and the air circulation channel becomes smoother, improving air permeability. At the same time, thicker silver wires can provide better support to prevent the fibers from being compressed too much during use, ensuring the continuous effectiveness of the air permeation channel. When the silver wire diameter is too large, the space between the fibers is too large, which can disrupt the tightness of the fabric, causing heat to be lost too quickly and reducing warmth retention. Moreover, the large space makes it difficult for the fabric to effectively prevent the intrusion of cold air from the outside, thereby affecting the warmth retention effect. The preferred embodiment is Example 7.

[0089] The above is based on the ideal embodiment of the present application, through the above description, relevant personnel can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the contents of the specification, and the technical scope must be determined according to the scope of the claims.

Claims

1. A method for preparing a moisture-absorbing, quick-drying and breathable fabric, characterized in that, It comprises the following steps: S1: wet spinning nylon spinning solution through profiled spinneret, to get modified nylon fiber with cross-shaped outer contour and hollow structure; S2: wet spinning polyester spinning solution, after being sprayed from the spinneret, it is placed in the silica solution for 2-3h to get the first modified polyester fiber; S3: the modified polyester fiber in S2 is soaked in 8-10% sodium hydroxide solution for 6-8h, and then taken out to get the second modified polyester fiber, and the modified nylon fiber is wrapped with metal wire to get wrapped nylon fiber; S4: the wrapped nylon fiber in S3 is used as warp fiber for weaving to get inner layer fabric, and the second modified polyester fiber in S3 is used as warp fiber for weaving to get outer layer fabric, and the outer layer fabric, PU film and inner layer fabric are hot pressed in the order from outside to inside to get a moisture absorption and quick drying breathable fabric.

2. The method for preparing the moisture absorption and quick-drying breathable fabric according to claim 1, characterized in that: The transverse part of the cross-shaped outer contour in S1 is consistent with the length of the longitudinal part, the width of the transverse part is consistent with the width of the longitudinal part, the ratio of the length to the width of the cross arm is 4-6:1, and the width of the cross arm is 0.2-0.4mm.

3. The method for preparing the moisture absorption and quick-drying breathable fabric according to claim 2, characterized in that: The hollow structure in S1 is located at the intersection of the transverse part and the longitudinal part, the hollow structure is coaxially arranged with the modified nylon fiber, the cross section of the hollow structure is circular and the diameter is 0.1-0.2mm.

4. The method for preparing the moisture absorption and quick-drying breathable fabric according to claim 1, characterized in that: The content of PA6 in the nylon spinning solution in S1 is 25-30wt%, the solvent is formic acid / water mixed solution with a volume ratio of 7:3, and the viscosity is 1500-2000mPa·s.

5. The method for preparing the moisture absorption and quick-drying breathable fabric according to claim 1, characterized in that: The content of PET in the polyester spinning solution in S2 is 25-30wt%, the solvent is trifluoroacetic acid / dichloromethane mixed solution with a volume ratio of 3:1, the viscosity is 2500-3000 mPa·s, and the diameter of the spinneret is 0.1-0.3mm.

6. The method for preparing the moisture absorption and quick-drying breathable fabric according to claim 1, characterized in that: The concentration of silica particles in the silica solution in S2 is 10-15wt%, the solvent is ethanol aqueous solution with a volume ratio of 1:1, the particle size of the silica is 20-50nm, and the silica solution contains 0.2wt% KH550.

7. The method for preparing the moisture absorption and quick-drying breathable fabric according to claim 1, characterized in that: The metal wire in S3 is silver wire with a diameter of 2-4μm, and the wrapping density of the metal wire is 8-12 twists / cm, and the wrapping tension is 0.8-1.2cN / dtex.

8. The method for preparing the moisture absorption and quick-drying breathable fabric according to claim 1, characterized in that: The inner layer fabric in S4 is plain weave with a warp density of 600 ends / 10cm and a weft density of 450 ends / 10cm, and the outer layer fabric is 2 / 2 twill weave with a warp density of 500 ends / 10cm and a weft density of 380 ends / 10cm.

9. The method for preparing the moisture absorption and quick-drying breathable fabric according to claim 1, characterized in that: The temperature of hot pressing in S4 is 160-200℃, the pressure is 1.5-2.5MPa, the linear speed is 1.5m / min, the cooling temperature is 15℃, and the mass ratio between the outer layer fabric, the PU film and the inner layer fabric is 4.5-5.5:2-3:5-6.

10. A moisture absorbent and quick drying breathable fabric, characterized in that, A method for preparing a moisture absorption and quick drying breathable fabric based on any one of claims 1-9.

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