A thermal quick-drying fabric based on profiled fibers and a preparation method and application thereof

Abstract

This invention belongs to the field of textile manufacturing technology, specifically relating to quick-drying fabrics for underwear, and more particularly to a thermally insulating and quick-drying fabric based on profiled fibers, its preparation method, and its applications. This invention provides thermally insulating and quick-drying underwear based on profiled fibers, achieving integrated heat-locking, quick-drying, and antibacterial functions, while simultaneously improving wearing comfort and durability, meeting the diverse needs of different consumer groups. This invention employs a double-layer structure design, with an inner heat-locking layer and an outer quick-drying layer. Combined with bio-based antibacterial technology and the selection of soft, skin-friendly fabrics, it forms a functional system of "inner layer heat-locking, outer layer sweat-wicking, antibacterial and odor-suppressing, lightweight and comfortable," achieving a dynamic balance between heat retention and quick-drying performance.

Description

Technical Field

[0001] This invention belongs to the field of textile manufacturing technology, and relates to quick-drying fabrics for underwear, and more particularly to a heat-insulating and quick-drying fabric based on irregularly shaped fibers, its preparation method and application. Background Technology

[0002] With the increasing demands for thermal and moisture comfort in outdoor sports and daily commutes, the heat retention and quick-drying properties of clothing fabrics have become key indicators for evaluating the performance of underwear. During high-intensity exercise or work in low-temperature environments, the human body easily produces a large amount of sweat. If underwear cannot wick away sweat quickly and dry rapidly, it will cause the wearer to experience a damp and cold discomfort. Simultaneously, insufficient heat retention in the fabric will fail to meet the heat retention requirements in low-temperature environments. Therefore, developing underwear that combines excellent heat retention and quick-drying properties has become an important research direction in the textile and apparel industry.

[0003] Currently, extensive research has been conducted both domestically and internationally on technologies related to quick-drying underwear, and certain technological accumulation has been achieved in the development of quick-drying fibers and fabric composite design. However, there are still shortcomings in the synergistic optimization of heat preservation and quick-drying functions. Specifically: In international research, European, American, and Japanese companies have led the development of moisture-wicking and quick-drying fibers. For example, INVISTA's COOLMAX® series fibers utilize an irregular cross-sectional structure, significantly improving moisture-wicking capacity by increasing the fiber's specific surface area. This allows for rapid wicking of sweat from the skin's surface and accelerated evaporation, and it is widely used in sportswear. Japanese companies like Teijin and Toyobo have introduced sports fabric technology into the underwear field, employing technologies such as nylon HYGRA and Tencel Lyocell composites, and cupro rayon blends. Through hydrophobic / hydrophilic layer designs and composite combinations of different fibers, they achieve the functional effect of wicking away sweat on the inside and absorbing moisture on the outside, while maintaining a soft feel. However, these international technologies primarily focus on improving quick-drying performance, paying insufficient attention to thermal insulation in low-temperature environments. This makes it difficult to meet the demands of outdoor sports and high-intensity activities in frigid regions for underwear that integrates thermal insulation and quick-drying properties.

[0004] In domestic research, companies like Anta and Li-Ning have adopted microporous polyester fiber technology to effectively improve the moisture-wicking and quick-drying properties of underwear, with some products approaching international standards. Driven by environmental policies, brands like Pathfinder have begun using environmentally friendly materials such as recycled polyester (rPET), promoting the green development of quick-drying underwear. Furthermore, quick-drying fabrics with composite functions such as antibacterial and UV protection have been applied in high-end outdoor brands. However, domestic quick-drying underwear technology still has significant shortcomings: on the one hand, core high-performance fiber technology still relies on imports, and domestically developed fibers lag behind international advanced levels in terms of quick-drying efficiency and durability; on the other hand, existing products often focus on improving a single quick-drying function, lacking sufficient synergistic design for insulation and quick-drying functions, especially lacking technical solutions based on optimized irregular fiber structures to simultaneously improve insulation and quick-drying performance, thus failing to fully meet the needs of low-temperature, high-activity scenarios.

[0005] In summary, while current domestic and international quick-drying underwear technology has made some progress in areas such as quick-drying fiber development and composite fabric design, existing technologies still face challenges in meeting the integrated needs of warmth and quick-drying in low-temperature environments. These challenges include reliance on imported core patents and poor synergy between warmth and quick-drying functions. Therefore, developing underwear based on optimized irregular fiber structures that can simultaneously achieve excellent warmth and quick-drying properties, breaking through existing technological bottlenecks, and meeting the functional needs of various scenarios such as outdoor sports and high-intensity activities, has significant practical importance and market value. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a heat-insulating and quick-drying fabric based on irregularly shaped fibers, its preparation method and application, which integrates heat-locking, quick-drying and antibacterial functions while improving wearing comfort and durability, thereby meeting the diversified needs of different consumer groups.

[0007] To achieve the above objectives, the present invention provides the following technical solution: On the one hand, the present invention provides a method for preparing a heat-insulating and quick-drying fabric based on irregularly shaped fibers, specifically including the following steps: Step 1, Raw material selection: Select irregular cross-section polyester fiber as the weaving material; Step 2, Weaving Process: A double-sided knitting machine is used, employing a double-sided yarn-adding knitting process. An outer quick-drying layer with a moisture-wicking and quick-drying knitted structure is formed using the aforementioned irregularly shaped cross-section polyester fiber. An inner heat-locking layer with a square groove knitted structure is formed using hydrophilic modified polyester fiber or fine denier polypropylene fiber. The outer quick-drying layer and the inner heat-locking layer are synchronously connected and woven into an integrated double-layer knitted structure using a sinking arc, resulting in a heat-insulating and quick-drying fabric. The outer quick-drying layer with the moisture-wicking and quick-drying knitted structure has a pre-wash water diffusion quick-drying time <1s (fastest 0.7s), a moisture-wicking core absorption height ≥130mm, and a moisture evaporation rate ≥0.3g / h, which are its core quick-drying and moisture-wicking quantitative characteristics. Step 3, dyeing and finishing process: The heat-insulating and quick-drying greige fabric is dyed, antibacterial treated and set in sequence to obtain heat-insulating and quick-drying fabric.

[0008] Optionally, the weaving process in step 2 is as follows: The fabric is woven in an integrated manner using double-sided knitting equipment and a double-sided yarn-adding knitting process. During the weaving process, an outer quick-drying layer with a capillary moisture-wicking effect is woven from polyester fiber with irregular cross-section as the core material. An inner heat-locking layer with a square groove knitting structure (groove depth of 0.2~0.4mm and width of 0.4~0.6mm, which can increase air retention) is woven from hydrophilic modified polyester fiber or fine denier polypropylene fiber. The outer quick-drying layer and the inner heat-locking layer are connected synchronously during the weaving process using the sinking arc structure of the double-sided knitting equipment, forming an integrated double-layer knitted structure without delamination. The yarn tension (3~9cN), warp density (9.5~12.5 needles / cm), and weft density (7.8~9.2 rows / cm) are controlled during the weaving process to obtain a uniformly structured heat-insulating and quick-drying fabric.

[0009] Specifically, the irregular cross-section polyester fiber is a four-groove cross-section polyester fiber, a six-groove cross-section polyester fiber, a cross-shaped cross-section polyester fiber, or a Y-shaped cross-section polyester fiber, etc. The surface of the fiber forms fine grooves and pores, and the specific surface area is significantly larger than that of conventional circular cross-section fibers.

[0010] Specifically, in step 1, considering the structural characteristics of the irregularly shaped cross-section polyester fiber and the tension parameters of the weaving process (3-9 cN), the irregularly shaped cross-section polyester fiber is pre-conditioned using a constant temperature and humidity artificial conditioned method. The conditioned environment temperature is controlled at 25-30℃ and the relative humidity at 60-70% RH. After standing for 8-16 hours, the fiber moisture regain is controlled within the standard range of 0.4% ± 0.05%, with a moisture regain deviation of ≤0.05% within the same batch, to avoid tension fluctuations caused by uneven yarn moisture content during subsequent knitting. It should be noted here that: The irregularly shaped polyester fibers used are four-groove / six-groove / cross-shaped / Y-shaped cross-section polyester fibers. Compared with ordinary round cross-section polyester fibers, they have more surface grooves, larger specific surface area, and are more prone to localized moisture adsorption. If conventional pre-conditioning parameters are used directly, problems such as water accumulation in the grooves and uneven moisture content inside and outside the yarn bundle can easily occur, leading to fluctuations in weaving tension. Therefore, it is necessary to make targeted adjustments to the core parameters of the conventional process. There is no need to change the steps, only optimize the parameter values. The specific adjustments are as follows: 1. Adjust the temperature of the conditioning chamber from 20~25℃ (room temperature) to 25~30℃ (medium-low temperature). Moderately increasing the temperature can accelerate the uniform diffusion of moisture in the grooves, avoid localized water accumulation in the grooves, and not damage the polyester fibers; 2. Adjust the relative humidity of the conditioning chamber from 65~75%. 1. Adjust the RH to 60~70%RH (slightly lower). Lowering the humidity can reduce the amount of water adsorbed on the surface of the irregular fibers and prevent the yarn from sticking together due to excessive water absorption in the grooves; 2. Adjust the resting time from 4~6h (short fiber yarn) to 8~12h (filament yarn) / 8~12h (short fiber yarn) / 12~16h (filament yarn). Extending the resting time allows the moisture to fully penetrate into the yarn and balance the moisture content of the grooves and the fiber body; 3. Adjust the yarn layer thickness from 20~30cm to ≤20cm (thinner). Further loosening the yarn ensures that the temperature and humidity airflow of the humidity control room penetrates the yarn layer and avoids uneven local humidity control.

[0011] Specifically, in step 2, the outer quick-drying layer is knitted using a plain knit or rib knit composite moisture-wicking and quick-drying knitting structure (especially suitable for high-intensity applications). During knitting, the yarn tension is controlled at 3-9 cN, the warp density at 9.5-12.5 stitches / cm, and the weft density at 7.8-9.2 rows / cm. Specifically, the plain knit moisture-wicking and quick-drying knitting structure corresponds to a yarn tension of 3-8 cN, a warp density of 10.5-12.5 stitches / cm, and a weft density of 8.2-9.2 rows / cm, while the rib knit composite moisture-wicking and quick-drying knitting structure corresponds to a yarn tension of 6-9 cN, a warp density of 10.0 stitches / cm, and a weft density of 8.0 rows / cm. By precisely controlling the aforementioned weaving parameters, the surface groove structure of the irregularly shaped cross-section polyester fiber is ensured to be intact and to form continuous capillary channels. These capillary channels enhance the capillary effect of the fiber, enabling rapid conduction and diffusion of sweat. Furthermore, the outer quick-drying layer and the inner heat-locking layer are woven synchronously on the same double-sided knitting machine, with a transverse density deviation of ≤0.5 stitches / cm and a longitudinal density deviation of ≤0.3 rows / cm. This avoids fabric delamination due to parameter differences and ensures the integrity of the continuous capillary channel structure. It is important to note that the loop density is controlled during the weaving process to make the outer surface loops flat, thus ensuring the smoothness of the sweat diffusion channels.

[0012] Specifically, in step 2, the inner heat-locking layer is woven using a square groove knitting structure improved from a "1+1 / 2+2 / 3+3" rib knit. During weaving, the warp density is controlled at 9.5~12.0 stitches / cm, the weft density at 7.8~9.0 rows / cm, the yarn tension at 3~9 cN, and the groove depth at 0.2~0.4mm and the groove width at 0.4~0.6mm. The regular square grooves increase air retention and improve the fabric's warmth while ensuring the softness of the inner layer in contact with the skin. It is important to note that the yarn tension must be strictly controlled during the weaving process to ensure the uniformity of the square groove structure.

[0013] Specifically, in step 3, the dyeing treatment uses environmentally friendly wash-resistant reactive dyes, and the dyeing temperature is controlled at 120~135℃, the holding time is 30~45min, the heating rate is 2℃ / min, and the pH value is 5.8~6.2. After dyeing, the dyes are washed 2~3 times with deionized water at 70~80℃ for 8~10min each time to remove residual dyes and auxiliaries.

[0014] Further, in step 3, the antibacterial treatment uses a quaternary ammonium salt antibacterial finishing agent, with an impregnation concentration of 1.8-2.2%, an impregnation pressure of 0.3-0.5 MPa, a baking temperature of 80-85℃, and a baking time of 18-22 min, to ensure that the antibacterial components are firmly attached to the fiber surface and to improve the durability of the antibacterial effect. Preferably, the quaternary ammonium salt antibacterial finishing agent can be dodecyl dimethyl benzyl ammonium chloride, benzalkonium bromide, dodecyl dimethyl phenoxyethyl ammonium bromide, or a composite quaternary ammonium salt antibacterial agent, etc.

[0015] Furthermore, in step 3, the relevant process parameters for the finishing process are as follows: the finishing temperature is controlled at 110~125℃, the finishing tension is 2~5cN, and the fabric is dried until the moisture content is ≤8% to ensure the fabric size is stable, while maintaining the fluffiness of the inner grid groove structure and the integrity of the outer moisture-wicking and quick-drying structure.

[0016] On the other hand, the present invention also provides a heat-insulating and quick-drying fabric prepared by the method described above. After testing according to the corresponding standards, the specific performance indicators of the heat-insulating and quick-drying fabric are as follows: unit area mass ≤175g / m² (FZ / T 70010-2006), fabric bursting strength ≥500N (YG031E type electronic fabric bursting strength tester), wicking height ≥120mm (FZ / T 01071-2008), evaporation rate ≥0.25g / h, antibacterial rate against Escherichia coli and Staphylococcus aureus ≥90%, antibacterial rate against Candida albicans ≥85% (FZ / T 73023-2006); and the water droplet diffusion time is <1s before washing and <6s after 50 washes, and the water absorption rate is >300% before and after washing.

[0017] In addition, the present invention also provides an application of the heat-insulating and quick-drying fabric prepared by the above preparation method, which can be used in heat-insulating and quick-drying underwear for outdoor sports (children's sports scenarios, high-intensity scenarios) or daily commuting scenarios. The underwear is prepared by three-dimensional cutting and high-precision sewing process.

[0018] The three-dimensional cutting mainly includes crotch cutting, shoulder cutting, and underarm cutting: the crotch cutting refers to the use of a 3D three-dimensional triangular insert design to ensure that the lateral stretch rate of the crotch fabric after cutting is ≥150%, meeting the needs of large movements such as squats and splits; the shoulder cutting refers to moving the front shoulder line forward by 6cm or more to avoid the acromion stress point and reduce the skin contact pressure during subsequent wear; the underarm cutting refers to the use of a three-dimensional splicing cutting design to make the cut underarm fabric accurately fit the curve of the human armpit, eliminating the friction and discomfort caused by traditional side seams.

[0019] Specifically, the sewing process mainly includes stitch selection, reinforcement of key areas, comfort enhancement, and quality control. Stitch selection refers to using Coats thread and a four-thread overlock stitch to increase stitch density, enhance the tensile stress of the sewn areas, and improve product durability. Reinforcement of key areas involves using microfiber lining to reinforce the neckline, ensuring it is soft, wear-resistant, and not easily deformed. Reinforced sewing methods are also used for key areas such as cuffs and crotch to further improve durability. Comfort enhancement involves using laser cutting technology to treat the cut edges and reduce rough edges; using seamless splicing technology to treat key friction areas, reducing friction between the sewn areas and the skin; and equipping the garment with a tear-off care label to avoid discomfort from direct friction between the label and the skin. Quality control refers to controlling the stitch density during the sewing process to ensure uniform stitches and avoid problems such as skipped stitches or broken threads.

[0020] Furthermore, after sewing is completed, an ironing process is performed. The ironing process refers to ironing the product using a low-temperature ironing process to make the product appearance smooth, improve the product grade, and at the same time avoid high temperature damage to the functional structure of the fabric.

[0021] After the corresponding underwear is manufactured, the dimensional accuracy, appearance quality (such as stitching, rough edges, and flatness of seams) and performance indicators (including unit area mass, fabric bursting strength, wicking height, evaporation rate, and antibacterial properties) of the thermal and quick-drying underwear products should be thoroughly inspected in strict accordance with quality standards to ensure they meet the performance requirements under the corresponding testing standards.

[0022] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects: 1. Synergistic optimization of heat preservation and quick drying: Through a double-layer structure design and the selection of irregularly shaped fibers, the inner layer's square groove structure achieves efficient heat retention, while the outer layer's moisture-wicking structure utilizes the capillary effect of irregularly shaped fibers to quickly wick away sweat. This solves the problem of the difficulty in achieving both heat preservation and quick drying functions in existing technologies, achieving a dynamic balance. Specifically, the water droplet diffusion time is <1s before washing and <6s after 50 washes; the water absorption rate is >300% before and after washing; the wicking height is ≥130mm before washing and ≥100mm after washing; and the drying rate is ≥0.3g / h before washing and ≥0.25g / h after washing. 2. Excellent and safe antibacterial effect: It uses quaternary ammonium salt antibacterial finishing agents, which have a broad antibacterial spectrum, long-lasting effect, and low irritation to human skin, without affecting the comfort of the fabric, and meet the safety requirements of underwear; among them, the antibacterial rate of Escherichia coli and Staphylococcus aureus is ≥90%, and the antibacterial rate of Candida albicans is ≥85%; 3. Comfortable to wear and allows for free movement: The combination of three-dimensional tailoring and high-precision sewing reduces skin friction and damage, improves body fit and movement adaptability, and the lightweight fabric further enhances wearing comfort, with a unit area weight ≤175g / m². 2 The fabric's bursting strength is ≥500N; 4. Significant industrialization advantages: The supply of core materials and finishing agents is stable and the cost is reasonable. The molding process is mature, enabling large-scale production. Moreover, the products meet environmental protection requirements and have strong market competitiveness. Attached Figure Description

[0023] The accompanying drawings are incorporated in and form part of this specification, and together with the description serve to explain the principles of the invention.

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the cross-section of the four-groove polyester fiber in Example 1 of the present invention; Figure 2 The 50S profiled polyester fiber yarn in Example 2 of this invention; Figure 3 This is a schematic diagram of the cross-section of the six-groove polyester fiber in Example 4 of the present invention; Figure 4 This is a schematic diagram of the 2+2 ribbed structure of the inner heat-locking layer in Embodiment 5 of the present invention; Figure 5 This is a schematic diagram illustrating the effect of the warm and quick-drying fabric involved in this invention; Figure 6This is a design drawing of underwear in Embodiment 5 of the present invention. Detailed Implementation

[0026] Exemplary embodiments will now be described in detail. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples consistent with some aspects of the invention as detailed in the appended claims.

[0027] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0028] In the following examples, the fabric weight was tested according to FZ / T 70010-2006 "Determination of Dry Weight per Square Meter of Knitted Fabrics"; the bursting strength of the fabric was tested using a YG031E electronic fabric bursting strength tester; the wicking height of the fabric was tested according to FZ / T01071-2008 standard; and the inhibition rates of Staphylococcus aureus (ATCC 6538), Escherichia coli (ATCC 25922), and Candida albicans (ATCC 10231) on the fabric were tested according to FZ / T 73023-2006 standard. The names and sources of the raw materials in the following examples are as follows: Dodecyl dimethyl benzyl ammonium chloride (purchased from Jinan Delan Chemical Co., Ltd.) Sodium sulfate (purchased from Shandong Haihui Chemical Co., Ltd.) Soda ash (purchased from Weifang Dakang Chemical Co., Ltd.) Example 1 This embodiment provides a men's style based on four-groove cross-section polyester fiber (see...). Figure 1 This invention relates to thermal and quick-drying underwear and its preparation method. Designed for adult men's outdoor sports activities, this thermal and quick-drying underwear features a double-layer, one-piece knitted structure. The core fabric is 100% four-groove cross-section polyester fiber (fiber fineness 1.2 dtex, length 38 mm), finished with a quaternary ammonium salt antibacterial finishing agent (dodecyl dimethyl benzyl ammonium chloride). The target size is men's 175 / 92A. The specific preparation process and parameters are as follows: Step 1: Select 100% four-groove irregular cross-section polyester fiber yarn (yarn count 40S), and ensure that the groove structure on the fiber surface is intact and undamaged by microscopic inspection; prepare auxiliary materials such as 2% by mass of dodecyl dimethyl benzyl ammonium chloride antibacterial finishing agent, environmentally friendly reactive red dye (model: CI reactive red 24), sodium sulfate, and soda ash, wherein the amount of sodium sulfate is 50g / L and the amount of soda ash is 20g / L.

[0029] In step 1, the four-groove cross-section polyester fiber is pre-conditioned using a constant temperature and humidity artificial humidification method. The humidification environment temperature is controlled at 25℃ and the relative humidity is 60%RH. After standing for 16 hours, the fiber moisture regain is controlled within the standard range of 0.4%±0.05%, and the moisture regain deviation of the same batch of fiber is ≤0.05%, so as to avoid tension fluctuations caused by uneven yarn moisture content during subsequent knitting.

[0030] Step 2: The above-mentioned irregular cross-section polyester fiber yarn is woven using a 14-needle computerized flat knitting machine (model: Santoni SM8-TOP2). The process parameters are: machine speed 30r / min, yarn feeding speed 1.2m / s, and yarn tension strictly controlled at 5~8cN. The inner heat-locking layer adopts a square groove structure based on the "2+2" rib knit, with a horizontal density of 10.5 needles / cm, a vertical density of 8.2 rows / cm, a groove depth of 0.3mm, and a groove width of 0.5mm. The outer quick-drying layer adopts a plain needle type moisture-wicking and quick-drying knitting structure, with a horizontal density of 11.2 needles / cm and a vertical density of 8.5 rows / cm. The two layers of fabric are knitted synchronously by adjusting the triangular trajectory of the knitting machine, ensuring that the two layers of fabric are tightly bonded, the structure is uniform and consistent, and there is no delamination or skipped stitches. This yields a heat-insulating and quick-drying fabric based on four-groove irregular cross-section polyester fiber.

[0031] Step 3: Place the above-mentioned heat-insulating and quick-drying greige fabric into a high-temperature and high-pressure dyeing vat (Lixin high-temperature and high-pressure dyeing machine). First, add deionized water, raise the temperature to 40℃, add the prepared environmentally friendly reactive red dye solution, and uniformly raise the temperature to 130℃ (heating rate 2℃ / min), and maintain the temperature for dyeing for 40 minutes. After dyeing, lower the temperature to 80℃, drain the dye solution, add deionized water for washing twice (10 minutes each time). Then, add 2% by mass of dodecyl dimethyl benzyl ammonium chloride antibacterial finishing agent, adjust the pH value to 6.0, and maintain the temperature at 80℃ for 20 minutes for antibacterial finishing. After maintaining the temperature, wash once more, and finally dry at 120℃ for 30 minutes (drying rate 5℃ / min), with a setting tension of 3cN, ensuring that the fabric moisture content is ≤8%. This yields a heat-insulating and quick-drying greige fabric based on four-groove profiled polyester fiber.

[0032] Based on GB / T 1335.1-2008 "Men's Clothing Size Standard", the specific dimensional parameters of size 175 / 92A were determined (length 72cm, chest 100cm, shoulder width 44cm, sleeve length 58cm). An automatic cutting machine (GERBERACCUMARK model) was used for 3D draping, with a cutting accuracy controlled within ±0.1cm. Sewing was performed using a Brother 7200 four-thread overlock machine, using Coats 402 polyester sewing thread (thread density 20s / 2), with a stitch density set to 12 stitches / 3cm and a stitch length of 3mm. A 3D triangular insert was used in the crotch area. The garment features a 15cm x 8cm panel with overlock stitching at the seams. The front shoulder line is shifted forward by 6.5cm, and a 0.5cm wide microfiber strip is added during shoulder seam stitching to enhance stability. The armpits utilize a Y-shaped three-dimensional splicing technique with a 1cm seam width, secured using seamless hot-pressing technology (130℃, 0.4MPa, 15s). The neckline is ribbed with an inner diameter of 38cm, reinforced with a 0.8cm wide microfiber strip. A tear-off care label is sewn onto the back waistband, with rounded edges to prevent sharp edges from rubbing against the skin. This results in a thermal and quick-drying underwear made from four-groove profiled polyester fiber.

[0033] The finished thermal and quick-drying underwear is ironed using a steam ironing machine at a temperature of 110℃ and a steam pressure of 0.3MPa. The ironing sequence is neckline → shoulder line → armpit → body → crotch. Each part is ironed for 8-10 seconds to ensure that the product has a smooth appearance without wrinkles or iron marks. The inspection process strictly follows the preset quality standards and conducts the following tests: (1) Size inspection: Use a steel tape measure to measure key dimensions such as garment length and chest circumference. The deviation must be ≤±1cm. (2) Appearance inspection: Check by visual inspection and touch to ensure there are no defects such as skipped stitches, broken stitches, stains, or damage. (3) Performance inspection: Samples are taken and tested according to the corresponding national standards. Unqualified products are marked and reworked. Qualified products are vacuum-packed and shipped.

[0034] According to the corresponding national standards, the underwear has a unit area mass of 168g / ㎡ and a bursting strength of 520N; the drip diffusion time is 0.8s before washing and 4.5s after washing; the water absorption rate is 320% before washing and 310% after washing; the wicking height is 135mm before washing and 105mm after washing; the drying rate is 0.32g / h before washing and 0.26g / h after washing; the antibacterial rate against Escherichia coli (ATCC 25922) and Staphylococcus aureus (ATCC 6538) is 92%, and the antibacterial rate against Candida albicans (ATCC10231) is 87%, which meets the design requirements.

[0035] Example 2 This implementation provides a lightweight, thermal, and quick-drying women's underwear made of Y-shaped cross-section polyester fiber and its manufacturing method. Designed for adult women's daily commutes and light exercise, this example emphasizes lightweight and fit. It adopts a double-layer knitted structure, with the core fabric being 100% Y-shaped cross-section profiled polyester fiber (fiber fineness 1.0 dtex, length 36 mm), finished with a quaternary ammonium salt antibacterial finishing agent (tetradecyl dimethyl benzyl ammonium chloride). The target size is women's 165 / 84A. The specific manufacturing process and parameters are as follows: Step 1: Select 100% Y-section polyester fiber yarn (yarn count 50S, see...) Figure 2 Microscopic examination confirmed the fiber cross-section was intact; prepare 1.8% tetradecyl dimethyl benzyl ammonium chloride antibacterial finishing agent, environmentally friendly reactive powder dye (model: CI reactive powder 17), sodium sulfate (45g / L), and soda ash (18g / L).

[0036] In step 1, the Y-shaped cross-section polyester fiber is pre-conditioned using a constant temperature and humidity artificial humidification method. The humidification environment temperature is controlled at 30℃ and the relative humidity is 70%RH. After standing for 8 hours, the fiber moisture regain is controlled within the standard range of 0.4%±0.05%, and the moisture regain deviation of the same batch of fiber is ≤0.05%, so as to avoid tension fluctuations caused by uneven yarn moisture content during subsequent knitting.

[0037] Step 2: The Y-shaped cross-section polyester fiber yarn is woven using a 16-needle computerized flat knitting machine (model: Santoni SM8-TOP3). The process parameters are: machine speed 35 r / min, yarn feed speed 1.0 m / s, yarn tension 4~6 cN; the inner heat-locking layer adopts a square groove structure based on a "1+1" rib knit, with a warp density of 12.0 needles / cm, a weft density of 9.0 rows / cm, a groove depth of 0.2 mm, and a groove width of 0.4 mm; the outer quick-drying layer adopts a plain knit type moisture-wicking and quick-drying knitting structure, with a warp density of 12.5 needles / cm and a weft density of 9.2 rows / cm, and synchronous knitting to ensure no delamination. This yields a heat-insulating and quick-drying fabric based on Y-shaped cross-section polyester fiber.

[0038] Step 3: Dye the above-mentioned warm and quick-drying fabric using a high-temperature and high-pressure dyeing process: Use a Lixin high-temperature and high-pressure dyeing machine. Heat deionized water to 40℃ and add dye liquor. Increase the temperature at a rate of 2℃ / min to 125℃ and maintain the temperature for 35 minutes. Cool down to 75℃ and drain the dye liquor. Wash twice (8 minutes each time). Add an antibacterial finishing agent to adjust the pH to 5.8. Maintain the temperature at 80℃ for 18 minutes. Wash once and dry at 115℃ for 25 minutes. Set the tension to 2cN and ensure the moisture content is ≤7%. This yields a warm and quick-drying fabric based on Y-shaped cross-section polyester fibers.

[0039] Based on GB / T 1335.2-2008 "Women's Clothing Sizes", size 165 / 84A (length 68cm, bust 92cm, shoulder width 40cm, sleeve length 55cm) was determined. Cutting was performed using an automatic cutting machine (Gerber Accumark) with an accuracy of ±0.1cm. Sewing was done using a Brother 7200 four-thread overlock machine with Coats 402 polyester thread (20s / 2), a stitch density of 13 stitches / 3cm. A 3D triangular insert (13cm×7cm) was added to the crotch area, the front shoulder line was moved forward by 6cm, and Y-shaped three-dimensional stitching was used under the armpits (seamless heat pressing: 125℃, 0.35MPa, 12s). The inner diameter of the ribbed neckline was 36cm, reinforced with a 0.6cm wide microfiber strip, and a rounded, tear-off care label was sewn onto the back waistband. This resulted in thermal and quick-drying underwear based on Y-shaped cross-section polyester fiber.

[0040] The finished thermal and quick-drying underwear was ironed using a steam ironing machine at a temperature of 105℃ and a pressure of 0.25MPa. The ironing sequence was the same as in Example 1, with each part taking 6-8 seconds. The dimensions, appearance, and performance were tested according to standards, and the qualified underwear was vacuum-packed.

[0041] Performance testing revealed the following results: the underwear has a unit area mass of 152g / ㎡ and a bursting strength of 510N; the water droplet diffusion time is 0.7s before washing and 4.2s after washing; the water absorption rate is 330% before washing and 315% after washing; the wicking height is 140mm before washing and 110mm after washing; the drying rate is 0.35g / h before washing and 0.28g / h after washing; the antibacterial rate against Escherichia coli and Staphylococcus aureus is 93%, and the antibacterial rate against Candida albicans is 88%; it is lightweight, fits snugly, and provides a comfortable and unrestricted fit.

[0042] Example 3 This implementation provides a children's thermal, antibacterial, and quick-drying underwear made of cross-section polyester fiber and its preparation method. Designed for children aged 6-8 years old in active settings, this example emphasizes warmth and safety. It adopts a double-layer soft knitted structure, with the core fabric being 100% cross-section profiled polyester fiber (fiber fineness 0.8 dtex, length 32 mm), finished with a quaternary ammonium salt antibacterial finishing agent (dodecyl dimethyl benzyl ammonium chloride). The target size is children's 130 / 64 (GB / T 1335.3-2008). The specific preparation process and parameters are as follows: Step 1: Select 100% cross-section profiled polyester fiber yarn (45S) and check the integrity of the fiber grooves; prepare 2.0% by mass of antibacterial finishing agent, environmentally friendly reactive light blue dye (CI reactive blue 49), sodium sulfate 40g / L, and soda ash 15g / L.

[0043] In step 1, the cross-shaped cross-section polyester fiber is pre-conditioned using a constant temperature and humidity artificial humidification method. The humidification environment temperature is controlled at 28℃ and the relative humidity is 65%RH. After standing for 12 hours, the fiber moisture regain is controlled within the standard range of 0.4%±0.05%, and the moisture regain deviation of the same batch of fiber is ≤0.05%, so as to avoid tension fluctuations caused by uneven yarn moisture content during subsequent knitting.

[0044] Step 2: The cross-shaped cross-section polyester fiber yarn is woven using a 14-needle computerized flat knitting machine (Santoni SM8-TOP2). The process parameters are: rotation speed 28 r / min, yarn feed speed 0.9 m / s, yarn tension 3~5 cN. The inner heat-locking layer adopts a grooved structure based on a "2+2" rib knit, with a warp density of 11.0 needles / cm and a weft density of 8.5 rows / cm, a groove depth of 0.25 mm, and a groove width of 0.45 mm. The outer quick-drying layer has a plain knit, with a warp density of 11.5 needles / cm and a weft density of 8.8 rows / cm, and synchronous knitting ensures a soft and comfortable fit. This yields a heat-insulating and quick-drying fabric based on cross-shaped cross-section polyester fiber.

[0045] Step 3: Perform high-temperature and high-pressure dyeing on the above-mentioned thermal insulation and quick-drying fabric (using a Lixin high-temperature and high-pressure dyeing machine), dyeing at 120℃ for 30 minutes with a heating rate of 2℃ / min; cool down to 70℃ and wash twice (10 minutes each time); perform antibacterial finishing (pH=6.0, 80℃, 18 minutes), and dry at 110℃ for 25 minutes after washing, with a setting tension of 5cN and a moisture content ≤7%. This yields a thermal insulation and quick-drying fabric based on cross-shaped polyester fibers.

[0046] Based on GB / T 1335.3-2008, the 130 / 64 size (length 58cm, chest 76cm, shoulder width 34cm, sleeve length 45cm) was determined, with an automatic cutting accuracy of ±0.1cm. A small four-thread overlock machine was used for sewing, with Coats 402 polyester thread and a stitch density of 12 stitches / 3cm. A 3D crotch insert (12cm×6cm) was added, the front shoulder line was moved forward by 5cm, and the underarms were smoothly joined without hard seams. The neckline had an inner diameter of 32cm, reinforced with a 0.5cm wide soft lining strip, and the care label was sewn onto the outside to avoid skin contact. This resulted in thermal and quick-drying underwear based on cross-shaped cross-section polyester fibers.

[0047] The above-mentioned thermal and quick-drying underwear is steam-ironed at a low temperature (100℃, 0.2MPa), and the ironing is done gently to avoid damaging the fabric. After strict testing to ensure there are no sharp edges or residual threads, it is packaged after passing the performance test.

[0048] Performance testing revealed the following results: the underwear has a unit area mass of 160g / ㎡ and a bursting strength of 490N; the water droplet diffusion time is 0.9s before washing and 5.0s after washing; the water absorption rate is 325% before washing and 305% after washing; the wicking height is 130mm before washing and 100mm after washing; the drying rate is 0.30g / h before washing and 0.25g / h after washing; and the antibacterial rate against Escherichia coli and Staphylococcus aureus is 91%, while the antibacterial rate against Candida albicans is 86%, meeting the safety standards for children's clothing.

[0049] Example 4 This embodiment provides a high-strength, heat-insulating, and quick-drying underwear for outdoor use based on six-groove cross-section polyester fiber and its preparation method. Designed for outdoor use, this example emphasizes the synergy of high strength and durability with warmth and quick-drying properties. It adopts a double-layer thickened knitted structure, with the core fabric being 100% six-groove profiled polyester fiber (fiber fineness 1.5 dtex, length 40 mm), finished with a quaternary ammonium salt antibacterial finishing agent (hexadecyl dimethyl benzyl ammonium chloride). The target size is men's 180 / 96A. The specific preparation process and parameters are as follows: Step 1: Select 100% six-groove profiled polyester fiber yarn (32S, see...) Figure 3 ), test fiber strength and groove integrity; prepare 2.2% hexadecyl dimethyl benzyl ammonium chloride antibacterial finishing agent, environmentally friendly reactive dark green dye (CI reactive green 8), sodium sulfate 55g / L, and soda ash 22g / L.

[0050] In step 1, the six-groove cross-section polyester fiber is pre-conditioned using a constant temperature and humidity artificial humidification method. The humidification environment temperature is controlled at 26℃ and the relative humidity is 62%RH. After standing for 10 hours, the fiber moisture regain is controlled within the standard range of 0.4%±0.05%, and the moisture regain deviation of the same batch of fiber is ≤0.05%, so as to avoid tension fluctuations caused by uneven yarn moisture content during subsequent knitting.

[0051] Step 2: The above-mentioned six-groove profiled polyester fiber yarn is woven using a 12-needle computerized flat knitting machine (Santoni SM8-TOP1). The process parameters are: rotation speed 25 r / min, yarn feed speed 1.1 m / s, yarn tension 6-9 cN. The inner heat-locking layer adopts a square groove structure based on a "3+3" rib knit, with a warp density of 9.5 stitches / cm, a weft density of 7.8 rows / cm, a groove depth of 0.4 mm, and a groove width of 0.6 mm. The outer quick-drying layer adopts a rib knit composite structure with a warp density of 10.0 stitches / cm and a weft density of 8.0 rows / cm to enhance the fabric strength. This yields a heat-insulating and quick-drying fabric based on six-groove profiled polyester fiber.

[0052] Step 3: Perform high-temperature and high-pressure dyeing on the above-mentioned warm and quick-drying fabric (using a Lixin high-temperature and high-pressure dyeing machine). Dye at 135℃ for 45 minutes, with a heating rate of 2℃ / min. Cool to 80℃ and drain the dye bath. Wash three times (10 minutes each time). Add an antibacterial finishing agent to adjust the pH to 6.2, maintain at 85℃ for 22 minutes, wash once, and dry at 125℃ for 35 minutes. The setting tension is 3cN, and the moisture content is ≤8%. This yields a warm and quick-drying fabric based on six-groove cross-section shaped polyester fibers. See the schematic diagram of the fabric's effect for reference. Figure 5 .

[0053] Based on GB / T 1335.1-2008, the 180 / 96A dimensions (length 75cm, chest 104cm, shoulder width 46cm, sleeve length 60cm) are used, with an automatic cutting accuracy of ±0.1cm. Sewing is performed using a JUKI MO-6714S four-thread overlock machine with Coats 402 high-strength polyester thread and a stitch density of 11 stitches / 3cm. The crotch area features a thickened 3D insert (16cm×9cm), the front shoulder line is shifted forward by 7cm, and the underarms are reinforced with three-dimensional splicing (seamless heat pressing + overlock: 135℃, 0.45MPa, 18s). The neckline is reinforced with double-layer ribbed stitching (inner diameter 39cm), and a 0.8cm wide high-strength lining strip is used. A durable, tear-away care label is sewn onto the back waistband. This results in thermal and quick-drying underwear based on six-groove cross-section irregularly shaped polyester fiber.

[0054] The aforementioned thermal and quick-drying underwear was ironed using a steam iron at a temperature of 115℃ and a pressure of 0.35MPa, and then allowed to cool naturally after ironing. The dimensional stability, sewing strength, and performance were strictly tested, and the underwear was packaged after passing the tests.

[0055] Performance testing revealed the following results: the underwear has a unit area mass of 172 g / m², a bursting strength of 580 N, a water droplet diffusion time of 0.9 s before washing and 5.5 s after washing, a water absorption rate of 310% before washing and 300% after washing, a wicking height of 132 mm before washing and 102 mm after washing, and a drying rate of 0.31 g / h before washing and 0.25 g / h after washing. It exhibits 94% antibacterial rate against Escherichia coli and Staphylococcus aureus, and 89% against Candida albicans, demonstrating excellent wash resistance (antibacterial rate remains ≥85% after 50 washes).

[0056] Example 5 This embodiment provides an environmentally friendly thermal and quick-drying underwear made from recycled profiled polyester fibers (such as recycled four-groove cross-section polyester fibers). This example emphasizes green environmental protection, using recycled profiled polyester fibers for everyday casual wear. It features a double-layer knitted structure, with the core fabric being 100% recycled four-groove profiled polyester fibers, finished with a quaternary ammonium salt antibacterial agent (dodecyl dimethyl benzyl ammonium chloride). The target size is men's 170 / 88A. The specific manufacturing process and parameters are as follows: Step 1: Select 100% recycled four-groove profiled polyester fiber yarn (40S) and test the fiber grooves and impurity content; prepare 2.0% by mass of antibacterial finishing agent, environmentally friendly reactive gray dye (CI reactive gray 2), 50g / L sodium sulfate, and 20g / L soda ash.

[0057] The recycled four-groove irregular cross-section polyester fiber is pre-conditioned using a constant temperature and humidity artificial humidification method. The humidification environment temperature is controlled at 27℃ and the relative humidity is 66%RH. After standing for 13 hours, the fiber moisture regain is controlled within the standard range of 0.4%±0.05%, and the moisture regain deviation of the same batch of fiber is ≤0.05%, so as to avoid tension fluctuations caused by uneven yarn moisture content during subsequent knitting.

[0058] Step 2: The above-mentioned recycled four-groove cross-section polyester fiber yarn is woven using a 14-needle computerized flat knitting machine (Santoni SM8-TOP2). The process parameters are: rotation speed 30 r / min, yarn feed speed 1.2 m / s, yarn tension 5-8 cN; the inner heat-locking layer has a 2+2 rib square groove structure (10.5 stitches / cm in width and 8.2 rows / cm in height, see [link]). Figure 4 The outer quick-drying layer is made of plain knit fabric (11.2 stitches / cm in the horizontal direction and 8.5 rows / cm in the vertical direction), and is knitted simultaneously to obtain a heat-insulating and quick-drying fabric based on recycled four-groove cross-section polyester fiber.

[0059] Step 3: The above-mentioned heat-insulating and quick-drying fabric is subjected to high-temperature and high-pressure dyeing, dyeing at 130℃ for 40 minutes with a heating rate of 2℃ / min; then cooled to 80℃ and washed twice with water, adding an antibacterial finishing agent (pH=6.0, 80℃, 20 minutes), and drying at 120℃ for 30 minutes after washing, with a moisture content ≤8%; phosphorus-free auxiliaries are used in the dyeing and finishing process to reduce environmental pollution. A heat-insulating and quick-drying fabric based on recycled four-groove cross-section profiled polyester fiber is obtained.

[0060] According to GB / T 1335.1-2008, the 170 / 88A size (length 70cm, chest 96cm, shoulder width 42cm, sleeve length 57cm) was used, with an automatic cutting accuracy of ±0.1cm. Sewing was done using a Brother 7200 four-thread overlock machine with Coats 402 recycled polyester thread, at a stitch density of 12 stitches / 3cm. A 3D crotch insert (14cm×8cm) was used, the front shoulder line was moved forward by 6.5cm, and there was seamless stitching under the armpits. The neckline reinforcement and care label design were the same as in Example 1. This resulted in thermal and quick-drying underwear based on four-groove cross-section shaped polyester fiber. See [link to example]. Figure 6 .

[0061] The above-mentioned thermal and quick-drying underwear was steam-ironed and tested. After passing the test, it was vacuum-packed (the packaging material was biodegradable non-woven fabric).

[0062] Testing revealed that the underwear has a unit area mass of 165g / ㎡, a bursting strength of 515N, a water droplet diffusion time of 0.8s before washing and 4.8s after washing, a water absorption rate of 325% before washing and 312% after washing, a wicking height of 136mm before washing and 108mm after washing, a drying rate of 0.33g / h before washing and 0.27g / h after washing, and an antibacterial rate of 92% against Escherichia coli and Staphylococcus aureus and 87% against Candida albicans, meeting the environmental textile standard (Oeko-Tex Standard 100 Class I).

[0063] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention.

[0064] It should be understood that the present invention is not limited to the content already described above, and various modifications and changes can be made without departing from its scope. The scope of the present invention is limited only by the appended claims.

Claims

1. A method for preparing a heat-insulating and quick-drying fabric based on irregularly shaped fibers, characterized in that, Includes the following steps: Step 1, Raw material selection: Select irregular cross-section polyester fiber as the weaving material; Step 2, Weaving Process: Using double-sided knitting equipment, the fabric is woven using a double-sided yarn-adding knitting process; an outer quick-drying layer with a moisture-wicking and quick-drying knitted structure is formed by weaving the aforementioned irregular cross-section polyester fibers, and an inner heat-locking layer with a square groove knitted structure is formed by weaving hydrophilic modified polyester fibers or fine denier polypropylene fibers; the outer quick-drying layer and the inner heat-locking layer are synchronously connected and woven into an integrated double-layer knitted structure through a sinking arc to obtain a heat-insulating and quick-drying fabric; Step 3, dyeing and finishing process: The heat-insulating and quick-drying greige fabric is dyed, antibacterial treated and set in sequence to obtain heat-insulating and quick-drying fabric.

2. The method for preparing the heat-insulating and quick-drying fabric based on irregularly shaped fibers according to claim 1, characterized in that, In step 1, the irregular cross-section polyester fiber is a four-groove cross-section polyester fiber, a six-groove cross-section polyester fiber, a cross-shaped cross-section polyester fiber, or a Y-shaped cross-section polyester fiber.

3. The method for preparing the heat-insulating and quick-drying fabric based on irregularly shaped fibers according to claim 1, characterized in that, In step 1, the irregular cross-section polyester fiber is pre-conditioned using a constant temperature and humidity artificial humidification method. The humidification environment temperature is controlled at 25~30℃ and the relative humidity is 60~70%RH. After standing for 8~16 hours, the fiber moisture regain is controlled within the standard range of 0.4%±0.05%, and the moisture regain deviation of the same batch of fiber is ≤0.05%, so as to avoid tension fluctuations caused by uneven yarn moisture content during subsequent knitting.

4. The method for preparing the heat-insulating and quick-drying fabric based on irregularly shaped fibers according to claim 1, characterized in that, In step 2, the outer quick-drying layer is woven with a plain knit or rib knit composite moisture-wicking quick-drying knitting structure, so that the surface groove structure of the irregular cross-section polyester fiber is complete and forms a continuous capillary channel. The capillary channel enhances the capillary effect of the fiber, realizing the rapid conduction and diffusion of sweat.

5. The method for preparing the heat-insulating and quick-drying fabric based on irregularly shaped fibers according to claim 1, characterized in that, In step 2, the inner heat-locking layer is woven using a square groove knitting structure improved based on the "1+1 / 2+2 / 3+3" rib knitting structure. During weaving, the horizontal density is controlled at 9.5~12.0 needles / cm, the vertical density at 7.8~9.0 rows / cm, the yarn tension at 3~9cN, the groove depth at 0.2~0.4mm, and the groove width at 0.4~0.6mm.

6. The method for preparing the heat-insulating and quick-drying fabric based on irregularly shaped fibers according to claim 1, characterized in that, In step 3, the dyeing treatment uses environmentally friendly wash-resistant reactive dyes, and the dyeing temperature is controlled at 120~135℃, the holding time is 30~45min, the heating rate is 2℃ / min, and the pH value is 5.8~6.

2. After dyeing, the dye is washed 2~3 times with deionized water at 70~80℃, each time for 8~10min.

7. The method for preparing the heat-insulating and quick-drying fabric based on irregularly shaped fibers according to claim 1, characterized in that, In step 3, the antibacterial treatment uses a quaternary ammonium salt antibacterial finishing agent with a padding concentration of 1.8~2.2%, a padding pressure of 0.3~0.5MPa, a baking temperature of 80~85℃, and a baking time of 18~22min.

8. The method for preparing the heat-insulating and quick-drying fabric based on irregularly shaped fibers according to claim 1, characterized in that, In step 3, the relevant process parameters for the finishing process are as follows: the finishing temperature is controlled at 110~125℃, the finishing tension is 2~5cN, and the fabric is dried until the moisture content is ≤8%.

9. A heat-insulating and quick-drying fabric prepared by the method according to any one of claims 1 to 8, characterized in that, The performance indicators of the heat-insulating and quick-drying fabric are as follows: unit area mass ≤175g / m², fabric bursting strength ≥500N, wicking height ≥120mm, evaporation rate ≥0.25g / h, antibacterial rate against Escherichia coli and Staphylococcus aureus ≥90%, antibacterial rate against Candida albicans ≥85%; and the water droplet diffusion time is <1s before washing and <6s after 50 washes, and the water absorption rate is >300% before and after washing.

10. An application of a heat-insulating and quick-drying fabric prepared by the method according to any one of claims 1 to 8, characterized in that, These are thermal and quick-drying underwear designed for outdoor sports or daily commuting, and are made using three-dimensional cutting and high-precision sewing techniques.

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