A moisture-regulating and sweat-guiding composite fabric and a preparation method thereof

Abstract

The application provides a moisture-regulating and sweat-guiding composite fabric and a preparation method thereof. The moisture-regulating and sweat-guiding composite fabric comprises, in sequence, an outer fabric layer, a waterproof and breathable layer and a moisture-regulating and sweat-guiding layer, and the layers are bonded through hot melt adhesive. The moisture-regulating and sweat-guiding layer is obtained by blending moisture-guiding fibers and moisture-storing and buffering polyester fibers. The moisture-guiding fibers are obtained by melt spinning after blending of first polyester chips and sodium-based montmorillonite. The moisture-storing and buffering polyester fibers are obtained by melt spinning after blending of second polyester chips and divalent metal ion-exchanged zeolite. The application can make the skin-friendly side of the composite fabric have liquid sweat absorption and accommodation capacity, moisture-guiding and diffusion capacity and drying performance.

Description

Technical Field

[0001] This application relates to the field of textile technology, specifically to a moisture-regulating and sweat-wicking composite fabric and its preparation method. Background Technology

[0002] With the increasing applications of outdoor sports, commuting protection, and workwear, clothing fabrics not only need to possess basic shielding, abrasion resistance, and protective properties, but also need to consider waterproofing, breathability, and wearing comfort. Especially in garments such as windbreakers, outdoor jackets, and work protective clothing, the fabrics typically need to block the intrusion of liquid water such as rain and snow, while allowing moisture generated during human activity to escape as much as possible, in order to reduce dampness and discomfort during wear.

[0003] Existing waterproof and breathable composite fabrics typically employ a multi-layered composite structure, such as an outer fabric layer, a waterproof and breathable membrane layer, and an inner skin-friendly layer. The outer fabric layer primarily provides abrasion resistance, tear resistance, and aesthetics; the waterproof and breathable membrane layer, usually made of polytetrafluoroethylene microporous membrane, polyurethane membrane, or other waterproof and breathable membranes, blocks external liquid water while allowing water vapor to pass through; the inner skin-friendly layer improves the feel when worn close to the skin and absorbs or conducts sweat to a certain extent.

[0004] However, while waterproof and breathable membranes allow water vapor to pass through, they typically prevent liquid sweat from directly penetrating. Therefore, during strenuous activity or when the clothing is worn in high-intensity environments, liquid sweat first enters the skin-friendly layer closest to the skin. If this layer's absorption and retention capacity is insufficient, sweat tends to remain at the skin contact point or in localized areas of the fabric, causing localized condensation. Conversely, if the layer retains moisture excessively after absorbing it, drying time is prolonged, affecting wearing comfort.

[0005] Ordinary polyester fiber skin-friendly layers have good durability and quick-drying properties, but their ability to wet and absorb liquid sweat is weak. Sweat is not easily contained and dispersed, and tends to remain on the surface of the skin-friendly layer or in local yarn gaps. While cotton fibers have good hygroscopicity and can absorb a significant amount of water, their ability to retain moisture after absorption is strong, resulting in a relatively slow drying speed. In waterproof and breathable composite fabrics, this can lead to the skin-friendly layer remaining damp for extended periods. Existing hydrophilic finishing fabrics can improve initial wetting properties to some extent, but their effectiveness is usually affected by factors such as the type of finishing agent, finishing fastness, fiber structure, and fabric weave. Furthermore, simply increasing hydrophilicity cannot simultaneously address moisture retention, diffusion, and drying properties.

[0006] For the skin-friendly layer of waterproof and breathable composite fabrics, simply improving moisture absorption or solely improving moisture wicking capacity is insufficient to meet wearing requirements. If the skin-friendly layer lacks sufficient liquid absorption and retention capacity, liquid sweat can easily accumulate in localized areas; if the skin-friendly layer can absorb a significant amount of sweat but has strong moisture retention or insufficient diffusion, the absorbed moisture will be difficult to spread and dry in a timely manner; if the skin-friendly layer only emphasizes moisture wicking and spreading while lacking adequate liquid absorption and retention capacity, sweat may not be effectively caught and temporarily stored by the fabric. Therefore, the skin-friendly layer needs to strike a balance between liquid sweat absorption and retention capacity, moisture wicking and diffusion capacity, and drying performance.

[0007] Therefore, existing waterproof and breathable composite fabrics still have shortcomings in managing sweat in the skin-friendly layer. These shortcomings mainly manifest as insufficient absorption and retention capacity of liquid sweat, a tendency for localized sweat accumulation, or strong moisture retention after absorption and a long drying time. Furthermore, it is difficult to simultaneously achieve a good balance between the area of ​​sweat diffusion and drying efficiency after absorption. Based on this, it is necessary to provide a moisture-regulating and sweat-wicking composite fabric that can improve the skin-friendly layer's ability to absorb and retain liquid sweat, reduce localized sweat accumulation, and improve sweat diffusion and drying performance within the skin-friendly layer. Summary of the Invention

[0008] This application provides a moisture-regulating and sweat-wicking composite fabric and its preparation method, aiming to solve the problems in existing waterproof and breathable composite fabrics where the skin-friendly layer has insufficient absorption and capacity for liquid sweat, is prone to localized liquid accumulation, or has strong moisture retention capacity after absorbing water but has a long drying time, and it is difficult to balance the diffusion area and drying efficiency of absorbed sweat. This application improves the skin-friendly layer's appropriate absorption and capacity for liquid sweat and improves the diffusion and drying performance of sweat in the skin-friendly layer.

[0009] In a first aspect, this application provides a moisture-regulating and sweat-wicking composite fabric, comprising: The outer fabric layer, the waterproof and breathable layer, and the moisture-regulating and sweat-wicking layer are bonded together by hot melt adhesive. The moisture-regulating and sweat-wicking layer is obtained by blending moisture-wicking fibers and moisture-retaining and buffering polyester fibers, wherein the mass ratio of moisture-wicking fibers to moisture-retaining and buffering polyester fibers is 1:(0.6~1); wherein the moisture-wicking fibers are obtained by melt spinning after blending a first polyester chip and sodium-based montmorillonite, and the moisture-retaining and buffering polyester fibers are obtained by melt spinning after blending a second polyester chip and divalent metal ion exchange zeolite.

[0010] According to this application, by setting a moisture-regulating and sweat-wicking layer formed by a blend of moisture-wicking fibers and moisture-retaining buffer polyester fibers on the inner side of the waterproof and breathable layer, the skin-friendly side of the composite fabric simultaneously has a moderate liquid sweat absorption and retention capacity and a moisture-wicking and diffusion capacity, thereby improving the artificial sweat absorption rate, increasing the artificial sweat diffusion area, and shortening the artificial sweat drying time.

[0011] Specifically, the waterproof and breathable layer can block external liquid water while allowing water vapor to pass through. However, liquid sweat formed by human perspiration usually cannot directly penetrate the waterproof and breathable layer. Therefore, liquid sweat first enters the moisture-wicking layer closest to the skin. Although ordinary polyester fibers have good durability and quick-drying properties, their ability to wet and absorb liquid sweat is relatively weak, and sweat tends to remain at the contact points or in local yarn gaps. Cotton fibers, while able to absorb more moisture, have a strong ability to retain moisture after absorption, resulting in a relatively slow drying speed. Therefore, for the skin-friendly side of waterproof and breathable composite fabrics, a balance needs to be struck between liquid sweat absorption and retention capacity, moisture wicking and diffusion capacity, and drying performance.

[0012] This application describes a moisture-regulating and wicking layer formed by a blend of moisture-wicking fibers and moisture-retaining and cushioning polyester fibers. The moisture-retaining and cushioning polyester fibers enhance the moisture-regulating and wicking layer's ability to absorb and retain liquid sweat, allowing sweat entering the skin-contact side to be caught and temporarily stored by the fabric layer, reducing the direct accumulation of liquid sweat in localized areas. The moisture-wicking fibers promote the diffusion of absorbed or temporarily stored moisture along the fiber surface, yarn gaps, and fabric pores, improving the subsequent drying process by expanding the moisture distribution area. Therefore, the moisture-regulating and wicking layer can balance artificial sweat absorption rate, diffusion area, and drying time.

[0013] The moisture-wicking fiber is obtained by melt spinning a blend of first polyester chips and sodium montmorillonite. Sodium montmorillonite has a hydrophilic layered structure; its introduction into polyester fibers improves the wetting and conductivity of liquid sweat, making it easier for sweat to diffuse along the fiber surface and between yarns. Since the moisture-wicking fiber still uses polyester as its matrix, it does not form a strong moisture-retention state similar to cotton fibers. Therefore, it can maintain the good drying performance of the polyester fiber system while improving moisture-wicking and diffusion capabilities. In other words, the moisture-wicking fiber is mainly used to increase the diffusion area of ​​artificial sweat and shorten the drying time of artificial sweat by promoting moisture spread.

[0014] Moisture-retaining and buffering polyester fibers are obtained by melt spinning a blend of second polyester chips and divalent metal ion-exchange zeolite. Zeolite itself has a porous structure, providing space for moisture adsorption and retention. Furthermore, after divalent metal ion exchange, divalent metal ions are introduced into the zeolite channels and exchange sites, providing more suitable hydration adsorption sites compared to ordinary zeolite, thereby improving the moisture-retaining and buffering polyester fiber's ability to absorb and retain liquid sweat. Since the divalent metal ion-exchange zeolite is dispersed within the polyester fiber, rather than existing as a superabsorbent resin or cotton fiber, its primary function is to provide moderate moisture retention and buffering, rather than forming a highly absorbent or water-locking structure. Therefore, moisture-retaining and buffering polyester fibers can improve the artificial sweat absorption rate of the moisture-regulating and wicking layer, and provide a basis for subsequent diffusion and drying of moisture under the action of the moisture-wicking fibers.

[0015] Meanwhile, moisture-wicking fibers and moisture-retaining buffer polyester fibers are blended at a mass ratio of 1:(0.6~1), so that the moisture-regulating and sweat-wicking layer contains both a moisture-retaining buffer component for receiving and moderately containing liquid sweat, and a moisture-wicking component for further dispersing moisture and promoting drying. The moisture-retaining buffer polyester fibers improve the moisture-regulating and sweat-wicking layer's absorption and retention capacity for liquid sweat, while the moisture-wicking fibers increase the moisture diffusion area and promote drying. The combination of the two avoids the problem of insufficient liquid absorption in ordinary polyester skin-friendly layers, and also avoids the problem of excessive moisture retention and slow drying in cotton fiber skin-friendly layers. Thus, it achieves a better overall effect in terms of artificial sweat absorption rate, artificial sweat diffusion area, and artificial sweat drying time.

[0016] In some embodiments, the moisture-wicking fiber comprises the following raw materials by weight: 100 parts of first polyester chips, 2 to 6 parts of sodium montmorillonite, and 0.2 to 1 part of first polyester dispersant.

[0017] In some of the above embodiments, sodium montmorillonite can improve the wetting and diffusion ability of moisture-wicking fibers to liquid sweat, and the first polyester dispersant can improve the dispersion state of sodium montmorillonite in the polyester system, so that the moisture-wicking fibers have more stable moisture-wicking properties after melt spinning, thereby improving the absorption and diffusion effect of moisture-regulating sweat-wicking layer on liquid sweat.

[0018] In some embodiments, the sodium-based montmorillonite has an average particle size of 0.5 to 2 μm and a cation exchange capacity of 70 to 120 mmol / 100g.

[0019] In some of the above embodiments, sodium montmorillonite has a suitable particle size and cation exchange capacity, which can be well dispersed in the polyester system and provide certain hydrophilic interaction sites in the moisture-wicking fibers, thereby facilitating the absorption and diffusion of liquid sweat in the moisture-wicking layer.

[0020] In some embodiments, the moisture-retaining and buffering polyester fiber comprises the following raw materials by weight: 100 parts of second polyester chips, 3 to 7 parts of divalent metal ion exchange zeolite, and 0.2 to 1 part of second polyester dispersant.

[0021] In some of the above embodiments, divalent metal ion exchange zeolite can provide certain moisture-retaining sites in the polyester fiber, enabling the moisture-retaining and buffering polyester fiber to moderately absorb and temporarily store liquid sweat, thereby improving the artificial sweat absorption rate of the moisture-regulating and wicking layer. The second polyester dispersant can improve the dispersion state of the divalent metal ion exchange zeolite in the second polyester chips, ensuring a more uniform distribution of the divalent metal ion exchange zeolite in the moisture-retaining and buffering polyester fiber, which is beneficial for the stable performance of the moisture-retaining and buffering effect. Since the divalent metal ion exchange zeolite is still dispersed in the polyester fiber system, its main function is to impart moderate moisture-retaining capacity to the fiber, rather than forming a strong moisture-retaining structure similar to cotton fiber. Therefore, it can be combined with the moisture-wicking fiber to balance sweat absorption rate, diffusion area, and drying time.

[0022] In some embodiments, the preparation method of the divalent metal ion exchange zeolite includes the following steps: 100 parts of 4A zeolite were dried and activated at 110-130℃ for 1-3 hours, and then added to 400-800 parts of a divalent metal salt aqueous solution with a molar concentration of 0.2-1 mol / L. Ion exchange was carried out at 60-80℃ for 2-5 hours to obtain divalent metal ion-exchanged zeolite.

[0023] In some of the above embodiments, drying and activating 4A zeolite helps remove some of the adsorbed water in the zeolite channels, making it easier for divalent metal ions to enter the zeolite channels and undergo ion exchange. After treatment with a divalent metal salt aqueous solution, some exchangeable cations in 4A zeolite are replaced by divalent metal ions, thus giving the zeolite more suitable exchange sites for moisture adsorption and temporary storage. Using it in moisture-wicking polyester fibers helps improve the moisture-regulating and wicking layer's ability to absorb and retain liquid sweat.

[0024] In some embodiments, the divalent metal salt aqueous solution includes magnesium ions and calcium ions, wherein the molar ratio of magnesium ions to calcium ions is 1:(0.4~0.6).

[0025] In some of the above embodiments, by using magnesium ions and calcium ions to perform ion exchange on 4A zeolite, divalent metal exchange sites with different water-affecting intensities can be formed in the zeolite, thereby enabling the divalent metal ion exchange zeolite to have both moderate liquid absorption capacity and good water release performance.

[0026] Specifically, magnesium ions have a relatively strong hydration capacity. After entering the 4A zeolite exchange sites, they can enhance the adsorption and capacity of divalent metal ion exchange zeolite for moisture in liquid sweat, giving the moisture-storing buffer polyester fiber a high artificial sweat absorption rate. However, if only magnesium ion exchange is used, the zeolite's effect on moisture is too strong, which may affect the moisture release rate and thus hinder subsequent drying.

[0027] Calcium ions have a relatively mild hydration capacity. After entering the 4A zeolite exchange sites, they can regulate the zeolite's adsorption strength for water, preventing the divalent metal ion-exchanged zeolite from forming an excessively strong water retention state. This is beneficial for the water contained in the moisture-absorbing and buffering polyester fibers to continue to diffuse and release under the action of the moisture-wicking fibers. However, if only calcium ion exchange is used, the liquid absorption capacity of the zeolite is relatively insufficient, and its effect on improving the liquid absorption rate of the moisture-regulating and wicking layer is limited.

[0028] Therefore, this application controls the molar ratio of magnesium ions to calcium ions to be 1:(0.4~0.6), allowing magnesium ions to provide a strong moisture-holding capacity and calcium ions to provide a relatively mild moisture-regulating capacity. With their combined effect, the divalent metal ion exchange zeolite avoids the problems of excessive moisture retention and prolonged drying time associated with magnesium ion exchange alone, and also avoids the problem of insufficient liquid absorption capacity associated with calcium ion exchange alone. When this magnesium-calcium dual ion exchange zeolite is used in moisture-absorbing and buffering polyester fibers, it enables the moisture-regulating and wicking layer to achieve a better overall balance between artificial sweat absorption rate, artificial sweat diffusion area, and artificial sweat drying time.

[0029] In some embodiments, the 4A zeolite has an average particle size of 0.5~2μm and a specific surface area of ​​300~500m². 2 / g.

[0030] In some of the above embodiments, 4A zeolite has suitable particle size and specific surface area, enabling it to be well dispersed in the polyester system and providing a certain pore structure for divalent metal ion exchange and subsequent moisture retention. Using it in moisture-absorbing and buffering polyester fibers helps to ensure a more uniform distribution of the divalent metal ion exchange zeolite within the fiber, thereby stably exerting a moderate moisture-absorbing and buffering effect.

[0031] In some embodiments, the outer fabric layer includes at least one of polyester woven fabric, nylon woven fabric, and polyester-nylon blended woven fabric; the waterproof and breathable layer is a polytetrafluoroethylene microporous membrane.

[0032] In some of the above embodiments, polyester woven fabric, nylon woven fabric, or polyester-nylon blended woven fabric can provide the composite fabric with good abrasion resistance, dimensional stability, and outer protective base, making it suitable for outdoor clothing, commuter clothing, or occupational protective clothing. The polytetrafluoroethylene microporous membrane is waterproof and breathable, blocking external liquid water from entering while allowing water vapor to pass through, thus working together with the inner moisture-regulating and sweat-wicking layer to meet the protective and comfortable wearing requirements of the composite fabric.

[0033] In some embodiments, the areal density of the outer fabric layer is 80~160 g / m². 2Based on the above implementation method, the outer fabric layer can provide suitable outer support and protection for the composite fabric, giving the composite fabric good durability and crispness, while avoiding the outer fabric layer being too heavy and affecting the overall wearing comfort.

[0034] In some embodiments, the areal density of the waterproof and breathable layer is 15~35 g / m³. 2 Based on the above implementation method, the waterproof and breathable layer can maintain a low interlayer load while providing waterproof and breathable functions, which is conducive to maintaining the softness and wearing comfort of the composite fabric, and forming a better composite structure with the inner moisture-wicking layer.

[0035] In some embodiments, the areal density of the moisture-wicking layer is 60~150 g / m². 2 Based on the above implementation method, the moisture-regulating and sweat-wicking layer has a suitable fiber content and layer thickness, which can provide a certain space for the absorption, containment and diffusion of liquid sweat, thereby helping to improve the absorption rate of artificial sweat, increase the diffusion area of ​​artificial sweat and improve the drying time of artificial sweat.

[0036] In some embodiments, the first polyester dispersant and the second polyester dispersant are independently selected from at least one of polyester wax dispersants, oxidized polyethylene wax, and ethylene-acrylic acid copolymer wax. Based on the above embodiments, the polyester dispersant can improve the dispersion state of sodium-based montmorillonite or divalent metal ion exchange zeolite in the polyester system, reduce the agglomeration of inorganic fillers during melt spinning, and make the functional fillers in the moisture-wicking fibers and moisture-storing buffer polyester fibers more uniformly distributed, thereby facilitating the stable performance of moisture-wicking diffusion and moisture-storing buffering functions.

[0037] Secondly, this application provides a method for preparing a moisture-regulating and sweat-wicking composite fabric, comprising: Provides a moisture-regulating and sweat-wicking composite fabric according to any embodiment of the first aspect, comprising an outer fabric layer, a waterproof and breathable layer, and a moisture-regulating and sweat-wicking layer; The outer fabric layer, waterproof and breathable layer, and moisture-wicking layer are bonded together in sequence with hot melt adhesive to obtain a moisture-wicking composite fabric.

[0038] According to this application, by sequentially laminating an outer fabric layer, a waterproof and breathable layer, and a moisture-wicking layer, a multi-layered composite structure can be formed, providing outer protection, a middle layer of waterproof and breathable material, and an inner layer of moisture-wicking material. This results in a composite fabric that combines outer protection, waterproof and breathable properties, as well as the skin-friendly functions of sweat absorption, diffusion, and drying. The preparation method is simple, applicable to conventional garment composite fabric processing, and helps maintain the functions of each layer and achieve stable lamination.

[0039] Compared with the prior art, the beneficial effects of this application are at least as follows: This application incorporates a moisture-regulating and sweat-wicking layer formed by a blend of moisture-wicking fibers and moisture-retaining buffer polyester fibers on the inner side of the waterproof and breathable layer. This allows the skin-friendly side of the composite fabric to simultaneously possess adequate liquid sweat absorption and retention capacity as well as moisture-wicking and diffusion capabilities. Specifically, the divalent metal ion-exchange zeolite in the moisture-retaining buffer polyester fibers enhances the absorption and retention capacity of the moisture-regulating and sweat-wicking layer, thereby increasing the artificial sweat absorption rate. The sodium montmorillonite in the moisture-wicking fibers improves the wetting and conductivity of the polyester fibers for liquid sweat, thus increasing the artificial sweat diffusion area and shortening the artificial sweat drying time by promoting moisture spread. Therefore, this application addresses the problem of insufficient liquid absorption capacity in ordinary polyester skin-friendly layers and avoids the issue of cotton fiber skin-friendly layers having strong moisture retention and slow drying after absorbing water. This results in a better overall effect for the composite fabric in terms of artificial sweat absorption rate, artificial sweat diffusion area, and artificial sweat drying time. Detailed Implementation

[0040] The various embodiments or implementation schemes in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments.

[0041] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0043] In this specification, unless otherwise specified, "parts" refers to "parts by weight".

[0044] The following describes embodiments of this application. The embodiments described below are exemplary and are only used to explain this application, and should not be construed as limiting this application. Where specific techniques or conditions are not specified in the embodiments, they are performed according to the techniques or conditions described in the literature in this field or according to the product instructions. Reagents or instruments used, unless otherwise specified, are all conventional products that can be obtained commercially.

[0045] Polyester chips, PET chips with an intrinsic viscosity of 0.65 dL / g; Sodium-based montmorillonite has an average particle size of approximately 1.2 μm and a cation exchange capacity of approximately 95 mmol / 100 g. 4A zeolite has an average particle size of approximately 1.0 μm and a specific surface area of ​​approximately 380 m². 2 / g; The polyester wax dispersant is a commercially available polyester wax dispersant for PET masterbatch, with a softening point of 120℃, an acid value of 18mgKOH / g, and a number-average molecular weight of 4500. Polyester woven fabric with a surface density of 120 g / m² 2 ; Polyurethane hot melt adhesive, with a melting temperature of 100~130℃.

[0046] Polytetrafluoroethylene microporous membrane: Polytetrafluoroethylene fine powder with a number average molecular weight of approximately 6 million is mixed with white oil (viscosity 8~15 mm at 40℃). 2 Mix the PTFE particles at a mass ratio of 100:20 (per s) and stir at low speed in a closed mixing device until homogeneous to obtain a PTFE mixture containing lubricant. Allow the mixture to stand at room temperature for 24 hours to allow the lubricant to fully penetrate between the particles. The settled mixture is loaded into a plunger extrusion device and extruded into a sheet preform. The sheet preform is then calendered through multiple passes to obtain a continuous thin sheet, with the sheet thickness controlled at approximately 0.08 mm. Subsequently, the thin sheet is placed in a circulating hot air furnace for degreasing treatment: first, it is held at 200°C for 20 minutes, and then the temperature is raised to 280°C and held for 30 minutes to allow the lubricant to evaporate and be removed, resulting in a degreased polytetrafluoroethylene film preform.

[0047] The degreased film preform was placed in a stretching apparatus for biaxial stretching: the film was heated to 320℃ and preheated at this temperature for 2 minutes. First, it was stretched longitudinally at a stretch ratio of 3.0 times and a stretching rate of 50 mm / s. Then, the film was rotated 90° and stretched transversely at a stretch ratio of 2.8 times and a stretching rate of 50 mm / s, thereby forming a node-fiber type microporous network structure within the film. After stretching, the film was heat-set at 360℃ for 2 minutes, then naturally cooled and wound up to obtain a polytetrafluoroethylene microporous membrane with an areal density of 20 g / m³. 2 .

[0048] Preparation Example 1 Preparation of the moisture-wicking layer: Preparation of divalent metal ion exchange zeolites: 100 portions of 4A zeolite were placed in a forced-air drying oven and dried and activated at 120°C for 2 hours to remove some of the adsorbed water in the pores of the 4A zeolite, thus obtaining activated 4A zeolite.

[0049] Magnesium chloride and calcium chloride were added to deionized water to prepare an aqueous solution of divalent metal salts, wherein the molar ratio of magnesium ions to calcium ions was 1:0.5, and the total molar concentration of divalent metal ions was 0.5 mol / L. 100 parts of activated 4A zeolite were added to 600 parts of the above divalent metal salt aqueous solution, and ion exchange was carried out by stirring at 70°C for 3 h. After the reaction was completed, the solid was filtered and separated, and washed with deionized water until the conductivity of the filtrate was less than 200 μS / cm. Then, it was dried at 110°C for 3 h to obtain magnesium-calcium dual ion-exchange zeolite.

[0050] Preparation of moisture-wicking fibers: Polyester chips, sodium montmorillonite, and polyester wax dispersant were mixed at a mass ratio of 100:4:0.5, wherein the first polyester dispersant was a commercially available polyester wax dispersant for PET masterbatches. The mixture was vacuum dried at 120°C for 6 hours to reduce the moisture content of the raw materials.

[0051] The dried mixture is fed into a melt spinning machine for melt extrusion. The temperatures of each zone of the extruder are set sequentially to 265℃, 270℃, 275℃, and 280℃. The melt is filtered through a 40μm metal screen and then enters a metering pump, where it is extruded through the spinning assembly. During the spinning process, the spinneret adopts a conventional circular spinneret structure. After being extruded, the melt is cooled and solidified by cooling air to form nascent filaments.

[0052] The nascent filaments are drawn at a temperature controlled at 80℃ with a total draw ratio of 3.2 times to orient the fiber molecular chains. After drawing, the filaments are oiled and then wound to obtain moisture-wicking fibers.

[0053] Preparation of moisture-absorbing and cushioning polyester fibers: Polyester chips, magnesium-calcium double ion-exchange zeolite, and polyester wax dispersant were mixed at a mass ratio of 100:5:0.5, wherein the second polyester dispersant was a commercially available polyester wax dispersant for PET masterbatches. The mixture was vacuum dried at 120°C for 6 hours to reduce the moisture content of the raw materials.

[0054] The dried mixture is fed into a melt spinning machine for melt extrusion. The temperatures of each zone of the extruder are set sequentially to 265℃, 270℃, 275℃, and 280℃. The melt is filtered through a 40μm metal screen and then enters a metering pump, where it is extruded through the spinning assembly. During the spinning process, the spinneret adopts a conventional circular spinneret structure. After being extruded, the melt is cooled and solidified by cooling air to form nascent filaments.

[0055] The nascent filaments are drawn at a temperature controlled at 80℃, with a total draw ratio of 3.2. After drawing, the filaments are oiled and then wound to obtain moisture-absorbing and cushioning polyester fibers.

[0056] Preparation of moisture-wicking yarn: Moisture-wicking fibers and moisture-retaining buffer polyester fibers are combined and twisted at a mass ratio of 1:0.8. The twisting method is bidirectional twisting, and the twist degree is controlled at 300T / m to obtain moisture-regulating and sweat-wicking yarn.

[0057] Preparation of the moisture-wicking layer: Using the aforementioned moisture-wicking yarn, a knitted fabric was prepared on a circular knitting machine with a gauge of 28 stitches and a single-sided plain weave structure. During the weaving process, the yarn linear density, weaving tension, and loop formation conditions were kept consistent, resulting in a fabric with an areal density of 120 g / m². 2 Thus, the moisture-regulating and sweat-wicking layer A is obtained.

[0058] Preparation Example 2 Preparation of the moisture-wicking layer: The preparation method is largely the same as in Example 1, except that the aqueous solution of the divalent metal salt is a 0.5 mol / L calcium chloride aqueous solution, resulting in moisture-regulating and sweat-wicking layer B.

[0059] Preparation Example 3 Preparation of the moisture-wicking layer: The preparation method is largely the same as in Example 1, except that the aqueous solution of the divalent metal salt is a 0.5 mol / L magnesium chloride aqueous solution, resulting in the moisture-regulating and sweat-wicking layer C.

[0060] Comparative Preparation Example 1 Preparation of the moisture-wicking layer: The preparation method is largely the same as in Example 1, except that the preparation of the moisture-wicking yarn is different, specifically: Preparation of moisture-wicking yarn: The moisture-wicking fibers are twisted in a bidirectional manner, with the twist degree controlled at 300T / m, to obtain a moisture-regulating and sweat-wicking yarn. This results in the moisture-regulating and sweat-wicking layer D.

[0061] Comparative Preparation Example 2 Preparation of the moisture-wicking layer: The preparation method is largely the same as in Example 1, except that the preparation of the moisture-wicking yarn is different, specifically: Preparation of moisture-wicking yarn: Moisture-retaining and cushioning polyester fibers are twisted in a bidirectional manner, with the twist degree controlled at 300T / m, to obtain a moisture-regulating and sweat-wicking yarn. This results in the moisture-regulating and sweat-wicking layer E.

[0062] Example 1 Preparation of moisture-regulating and sweat-wicking composite fabric: The moisture-regulating and sweat-wicking layer A obtained in Preparation Example 1 was used as the moisture-regulating and sweat-wicking layer, polyester woven fabric was used as the outer fabric layer, polytetrafluoroethylene microporous membrane was used as the waterproof and breathable layer, and polyurethane hot melt adhesive was used as the interlayer bonding material.

[0063] Lay the polyester woven fabric flat as the outer fabric layer, and apply polyurethane hot melt adhesive evenly to one side of the polyester woven fabric, controlling the amount of adhesive applied to be 10g / m². 2 Then, the polytetrafluoroethylene microporous membrane is laid flat on the polyurethane hot melt adhesive layer, so that the polytetrafluoroethylene microporous membrane is aligned with the polyester woven fabric to form the first bonding structure.

[0064] On the other side of the polytetrafluoroethylene microporous membrane, polyurethane hot melt adhesive is applied uniformly, with the amount of adhesive applied controlled at 10 g / m². 2 Then, the moisture-regulating and sweat-wicking layer A obtained in Preparation Example 1 is laid flat on the polyurethane hot melt adhesive layer, so that the moisture-regulating and sweat-wicking layer A is aligned with the polytetrafluoroethylene microporous membrane, forming a three-layer composite structure consisting of polyester woven fabric, polytetrafluoroethylene microporous membrane and moisture-regulating and sweat-wicking layer A in sequence.

[0065] The three-layer composite structure described above is fed into a hot-pressing lamination machine for bonding. The hot-pressing roller temperature is set to 125℃, the linear pressure to 0.25MPa, and the bonding speed to 2.0m / min. During the bonding process, the polyurethane hot melt adhesive is first softened and wetted under hot pressure, and then the interlayer bonding is completed by the main pressure. After bonding, the composite fabric is allowed to cool at room temperature for 30 minutes to allow the hot melt adhesive to solidify and set, resulting in a moisture-regulating and sweat-wicking composite fabric.

[0066] Example 2 Preparation of moisture-regulating and sweat-wicking composite fabric: Similar to Example 1, except that moisture-wicking layer A is replaced with moisture-wicking layer B.

[0067] Example 3 Preparation of moisture-regulating and sweat-wicking composite fabric: Similar to Example 1, except that moisture-wicking layer A is replaced with moisture-wicking layer C.

[0068] Comparative Example 1 Preparation of moisture-regulating and sweat-wicking composite fabric: Similar to Example 1, except that moisture-wicking layer A is replaced with moisture-wicking layer D.

[0069] Comparative Example 2 Preparation of moisture-regulating and sweat-wicking composite fabric: Similar to Example 1, except that moisture-wicking layer A is replaced with moisture-wicking layer E.

[0070] Test section The composite fabrics prepared in the examples and comparative examples were cut into 10cm × 10cm composite fabric samples. Separately, 10cm × 10cm moisture-wicking layer samples were cut from the moisture-wicking layers obtained in the preparation examples and comparative preparation examples for testing the artificial sweat absorption rate. Before testing, all samples were placed in a standard environment at 20±2℃ and 65±5% relative humidity for 24 hours to equilibrate. Each group of samples was tested in parallel five times, and the average value was taken.

[0071] (1) Artificial sweat absorption rate test Artificial sweat is used to simulate human sweat. During testing, the initial mass of the moisture-wicking layer sample after equilibrium is first weighed and recorded as m0. The sample is then laid flat in contact with the artificial sweat, ensuring complete contact for 30 seconds. The sample is then removed and allowed to hang vertically for 30 seconds to remove any unabsorbed surface droplets. The mass of the sample is then weighed again and recorded as m1. The absorbency rate of the artificial sweat is calculated using the following formula: Artificial sweat absorption rate = (m1-m0) / m0×100%.

[0072] The higher the absorption rate of artificial sweat, the stronger the moisture-wicking layer's ability to absorb and retain liquid sweat.

[0073] (2) Test of artificial sweat diffusion area Take a composite fabric sample that has been equilibrated under standard conditions and lay it flat on a horizontal test surface with the moisture-wicking layer facing upwards. Stain the artificial sweat with a small amount of methylene blue to observe the wetted area. Add 0.5 mL of stained artificial sweat to the center of the sample, let it stand for 5 minutes, and then photograph the sample surface. Measure the area of ​​the wetted area using image analysis software; this area is recorded as the artificial sweat diffusion area.

[0074] The larger the area of ​​artificial sweat diffusion, the stronger the lateral spreading and moisture-wicking diffusion ability of liquid sweat on the moisture-regulating and sweat-wicking layer side of the sample.

[0075] (3) Artificial sweat drying time test Take a composite fabric sample that has been equilibrated under standard environmental conditions, lay it flat on a horizontal test platform with the moisture-wicking layer facing upwards, and weigh the initial mass of the sample, denoted as M0. Then, drop 2 mL of artificial sweat onto the center of the sample and immediately weigh the mass after the drop, denoted as M1. Place the sample in an environment with a temperature of 20±2℃ and a relative humidity of 65±5% to air dry, weighing the sample every 5 minutes until the sample mass recovers to within 105% of M0, and record the time required, denoted as the artificial sweat drying time.

[0076] The shorter the drying time of artificial sweat, the faster the moisture is removed from the sample after absorbing and diffusing the artificial sweat, and the better the quick-drying performance.

[0077] The artificial sweat was prepared as follows: 5.0 g of sodium chloride, 1.0 g of lactic acid, and 1.0 g of urea were weighed, dissolved in deionized water, and the volume was adjusted to 1000 mL. The pH was then adjusted to 6.5 ± 0.2 to obtain the artificial sweat. The dyed artificial sweat used for diffusion area testing was prepared as follows: Methylene blue (0.05 g / L) was added to the above artificial sweat, and the mixture was stirred until completely dissolved to obtain the dyed artificial sweat.

[0078] The results are shown in Table 1.

[0079] Table 1

[0080] Note: The absorbency of artificial sweat was tested using the corresponding moisture-wicking layer sample; the diffusion area and drying time of artificial sweat were tested using the corresponding composite fabric sample.

[0081] As shown in Table 1, Example 1 exhibits better overall moisture-regulating and sweat-wicking effects compared to Comparative Example 1 and Comparative Example 2. Comparative Example 1 uses only moisture-wicking fibers, and its artificial sweat diffusion area is 23.5 cm². 2 The artificial sweat drying time was 87 minutes, indicating that the moisture-wicking fibers can promote the lateral spread of liquid sweat and improve drying performance. However, the liquid absorption rate of the artificial sweat in Comparative Example 1 was only 118.4%, significantly lower than the 165.3% in Example 1, indicating that the absorption and holding capacity of liquid sweat is insufficient when moisture-wicking fibers are used alone. This may be because Comparative Example 1 lacks moisture-retaining and buffering polyester fibers, which cannot provide adequate holding capacity for the liquid sweat entering the moisture-regulating and wicking layer.

[0082] Comparative Example 2, which used only moisture-retaining and cushioning polyester fibers, achieved an artificial sweat absorption rate of 183.2%, indicating that the moisture-retaining and cushioning polyester fibers have a strong capacity to absorb and hold liquid sweat. However, the artificial sweat diffusion area of ​​Comparative Example 2 was only 9.8 cm². 2 The artificial sweat drying time reached 133 minutes, which was significantly worse than that of Example 1. The possible reason is that Comparative Example 2 lacked moisture-wicking fibers, making it difficult for the liquid sweat to spread laterally in the fabric after absorption, resulting in a smaller diffusion area and a longer drying time.

[0083] This demonstrates that, through the combination of moisture-wicking fibers and moisture-retaining buffer polyester fibers, the composite fabric's skin-friendly side possesses moderate liquid absorption and retention capacity, moisture-wicking and diffusion capacity, and good drying performance.

[0084] As shown in Examples 1-3, the type of exchange ions in the divalent metal ion-exchange zeolite of the moisture-retaining and cushioning polyester fiber has a certain influence on the overall performance of the moisture-regulating and sweat-wicking composite fabric. Example 2 used calcium ion-exchange zeolite, and the artificial sweat absorption rate was 143.8%, lower than that of Examples 1 and 3, but the artificial sweat diffusion area was 20.9 cm². 2 The artificial sweat drying time was 92 minutes, indicating that calcium ion-exchange zeolite has a relatively weak water-holding capacity, and water is more easily diffused and dried by the moisture-wicking fibers. Example 3 used magnesium ion-exchange zeolite, achieving an artificial sweat absorption rate of 177.1%, but the artificial sweat diffusion area was only 16.4 cm². 2 The drying time of artificial sweat was 109 minutes, indicating that magnesium ion exchange zeolite has a strong ability to hold water. However, if the water retention is too strong, it will affect subsequent diffusion and drying.

[0085] Example 1, using zeolite with both magnesium and calcium ions for exchange, exhibited a higher artificial sweat absorption rate, a larger artificial sweat diffusion area, and a shorter artificial sweat drying time compared to Example 2 and Example 3. This demonstrates that when using a certain proportion of magnesium and calcium ions as exchange ions, divalent metal ion exchange zeolite provides a more balanced balance between moisture retention and diffusion performance. Compared to using calcium or magnesium ion exchange zeolite alone, this method is more effective in achieving optimal artificial sweat absorption rate, diffusion area, and drying time in moisture-regulating and wicking composite fabrics.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A moisture-regulating and sweat-wicking composite fabric, characterized in that, In order, they include: The outer fabric layer, the waterproof and breathable layer, and the moisture-regulating and sweat-wicking layer are bonded together by hot melt adhesive. The moisture-regulating and sweat-wicking layer is obtained by blending moisture-wicking fibers and moisture-retaining and buffering polyester fibers, wherein the mass ratio of moisture-wicking fibers to moisture-retaining and buffering polyester fibers is 1:(0.6~1); wherein the moisture-wicking fibers are obtained by melt spinning after blending a first polyester chip and sodium-based montmorillonite, and the moisture-retaining and buffering polyester fibers are obtained by melt spinning after blending a second polyester chip and divalent metal ion exchange zeolite.

2. The moisture-regulating and sweat-wicking composite fabric according to claim 1, characterized in that, The moisture-wicking fiber comprises the following raw materials by weight: 100 parts of first polyester chips, 2-6 parts of sodium montmorillonite, and 0.2-1 parts of first polyester dispersant.

3. The moisture-regulating and sweat-wicking composite fabric according to claim 2, characterized in that, The sodium-based montmorillonite has an average particle size of 0.5–2 μm and a cation exchange capacity of 70–120 mmol / 100g.

4. The moisture-regulating and sweat-wicking composite fabric according to claim 1, characterized in that, The moisture-retaining and buffering polyester fiber, by weight It includes the following raw materials: 100 parts of second polyester chips, 3-7 parts of divalent metal ion exchange zeolite, and 0.2-1 parts of second polyester dispersant.

5. The moisture-regulating and sweat-wicking composite fabric according to claim 4, characterized in that, The preparation method of the divalent metal ion exchange zeolite includes the following steps: 100 parts of 4A zeolite were dried and activated at 110-130℃ for 1-3 hours, and then added to 400-800 parts of a divalent metal salt aqueous solution with a molar concentration of 0.2-1 mol / L. Ion exchange was carried out at 60-80℃ for 2-5 hours to obtain divalent metal ion-exchanged zeolite.

6. The moisture-regulating and sweat-wicking composite fabric according to claim 5, characterized in that, The divalent metal salt aqueous solution includes magnesium ions and calcium ions, and the molar ratio of magnesium ions to calcium ions is 1:(0.4~0.6).

7. The moisture-regulating and sweat-wicking composite fabric according to claim 5, characterized in that, The 4A zeolite has an average particle size of 0.5~2μm and a specific surface area of ​​300~500m². 2 / g.

8. The moisture-regulating and sweat-wicking composite fabric according to claim 1, characterized in that, The outer fabric layer includes at least one of polyester woven fabric, nylon woven fabric, and polyester-nylon blended woven fabric; the waterproof and breathable layer is a polytetrafluoroethylene microporous membrane.

9. The moisture-regulating and sweat-wicking composite fabric according to any one of claims 1 to 8, characterized in that, At least one of the following conditions must be met: 1) The areal density of the outer fabric layer is 80~160 g / m². 2 ; 2) The areal density of the waterproof and breathable layer is 15~35g / m³. 2 ; 3) The areal density of the moisture-regulating and sweat-wicking layer is 60~150g / m². 2 ; 4) The first polyester dispersant and the second polyester dispersant are independently selected from at least one of polyester wax dispersants, oxidized polyethylene wax, and ethylene-acrylic acid copolymer wax.

10. A method for preparing a moisture-regulating and sweat-wicking composite fabric, characterized in that, include: The moisture-regulating and sweat-wicking composite fabric according to any one of claims 1 to 9 comprises an outer fabric layer, a waterproof and breathable layer, and a moisture-regulating and sweat-wicking layer; The outer fabric layer, waterproof and breathable layer, and moisture-wicking layer are bonded together in sequence with hot melt adhesive to obtain a moisture-wicking composite fabric.

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