High-elasticity polyester cotton-imitating blended woven sports fabric and preparation method thereof

Abstract

The present application relates to the technical field of textiles, in particular to a high-elasticity polyester-cotton blended woven sports fabric and a preparation method thereof, aiming to solve the bottleneck of material incompatibility, process conflict and performance difficulty in balancing when integrating high elasticity, cotton-like comfort and intelligent response functions in the existing sports fabric. The fabric is woven from a variety of plasma-grafted functional fibers, and through the innovative application of supercritical CO2 fluid treatment and microwave catalytic fixation process, the damage of traditional high temperature and high pressure conditions to fiber materials and functional molecules is avoided, and at the same time, the firm combination between the functional layer and the fiber substrate is ensured. Through systematic design of fiber components, fabric structure and functional finishing process, the problems of insufficient multifunctional integration, mutual performance restriction and insufficient mechanical properties in the prior art are solved, and a new solution is provided for high-strength sports and daily leisure scenarios.

Description

Technical Field

[0001] This invention belongs to the field of textile technology, and specifically relates to a high-elastic polyester-cotton blended woven sports fabric and its preparation method. Background Technology

[0002] In the field of functional textile technology, especially woven sports fabrics for high-intensity sports and everyday leisure, technological evolution has always revolved around improving the wearer's overall experience. With the continuous development of materials science, textile engineering, and consumer demands, modern sports fabrics are no longer limited to single physical performance indicators, but are evolving towards multifunctional integration, ultimate comfort, and intelligent responsiveness. Specifically, an ideal sports fabric not only needs excellent stretch resilience to adapt to the significant deformation of the human body during exercise, ensuring a close fit and a feeling of freedom, but also needs to provide a skin-friendly, soft touch similar to natural fibers (such as cotton) and good moisture absorption and breathability to meet the comfort challenges of prolonged wear. Building on this, integrating environmentally responsive intelligent functions, such as dynamic thermal and humidity management or visual alerts based on changes in body temperature or the external environment, has become an important indicator of the technological level of high-end sports fabrics.

[0003] Patent CN113774599B discloses a high-elasticity and breathable textile material and its manufacturing process. This patent constructs a textile material that combines high elasticity and breathability by using a multi-layered woven fabric that is rolled up and bonded together. The method achieves highly efficient, unattended production through automated processes such as uniform adhesive bonding, uniform dyeing, and rapid shaking and draining of woven fabrics of different materials. However, due to interfacial compatibility issues between different fiber types, the finished product may experience decreased pilling resistance, reduced elasticity, and inconsistent deformation between different fiber components after multiple washes after long-term use, affecting the overall durability of the fabric. Furthermore, this solution primarily focuses on optimizing the physical properties of the material and fails to fully integrate a cotton-like feel with intelligent response functions, making it difficult to meet the multifunctional integration requirements of modern sportswear fabrics.

[0004] Patent CN116084075B discloses a self-regulating textile manufacturing system. This patent utilizes an intelligent detection and adjustment mechanism to dynamically adjust elasticity standards, warp density, and weft density during textile production based on actual thickness and surface characteristics, thereby improving the fabric's dimensional stability and elasticity. However, this technical solution primarily focuses on the dynamic adjustment of production parameters, lacking in-depth design for fabric comfort and functionality, particularly neglecting the optimization of a cotton-like feel and the introduction of intelligent response functions. Furthermore, the high-temperature and high-pressure conditions in traditional finishing processes may damage the core molecules of functional finishing agents (such as phase-change microcapsule shell materials or color-changing dyes), while mild finishing conditions cannot guarantee a strong bond between the functional layer and the fiber substrate, limiting functional durability.

[0005] In the development of functional sports fabrics, improving breathability to meet the thermal and moisture comfort requirements under high-intensity exercise is one of the core technical goals. Conventional methods mainly use mechanical punching or laser perforation to create breathable channels on the fabric surface, but these technologies have significant drawbacks: Mechanical punching (such as rotary die-cutting and needle roller piercing) forcibly cuts the warp and weft yarns through physical punching, resulting in complete destruction of the yarn structure at the hole edge; tear strength loss is as high as 35-40%, and fuzz is easily generated at the hole edge; the heat effect of punching causes synthetic fibers to melt and solidify, forming a brittle interface and reducing fatigue life. Laser perforation (CO2 or fiber laser), although avoiding mechanical stress, causes high-temperature ablation, leading to fiber melting and carbonization: the melting rate of heat-sensitive fibers such as spandex is >5%; a 15-30μm thermal damage zone is formed around the hole, and micro-cracks cause stress concentration; tear strength still decreases, and the hole size expands after washing; the tear strength loss of the fabric after laser processing requires additional coating repair, but this sacrifices breathability.

[0006] The above problems indicate that existing technologies still have certain limitations in terms of materials science, processing technology, and final performance. Summary of the Invention

[0007] This invention provides a high-elastic polyester-cotton blend woven sports fabric and its preparation method. Through the synergistic design of fiber components, the composite construction of the fabric's microstructure, and the systematic optimization of the integrated finishing and substrate bonding process, it solves the problems of insufficient multi-functional integration, mutual performance constraints, and inadequate mechanical properties in existing technologies. This fabric meets the needs of high-intensity sports and everyday leisure scenarios while achieving a high degree of unity between elasticity, comfort, and intelligent responsiveness.

[0008] A method for preparing a high-elastic polyester-cotton blend woven sports fabric includes the following steps:

[0009] Step S1. Fiber blending pretreatment and Siro compact spinning;

[0010] Step S2. Multifunctional zoned warping and weaving;

[0011] Step S3. Fabric pretreatment and critical point relaxation setting;

[0012] Step S4. Nano-atomization function finishing;

[0013] Step S5. Microwave-catalyzed immobilization;

[0014] Step S6. Laser micro-hole array processing;

[0015] Step S7. Post-processing.

[0016] Preferably, the fiber blending pretreatment and Siro compact spinning include the following steps: Regenerated polyester fibers and bio-based nylon fibers, pre-treated with plasma grafting modification, are mixed thoroughly with untreated high-elastic polyester-cotton blend fibers in an opening device. Subsequently, the mixed fiber bundle is fed into the double-roller feeding zone of the Siro compact spinning machine, and guided into the core layer channel and sheath layer channel respectively according to the design requirements of the core-sheath structure. Simultaneously, spandex filaments with a specification of 20D to 40D are used as core yarns and fed synchronously with the core layer fibers. By adjusting the negative pressure in the compact spinning air-gathering zone to -10kPa to -15kPa and setting the roller speed ratio to 1.2:1, a functional blended yarn with a clear core-sheath structure and a count of 40S to 60S is finally spun.

[0017] The selection of recycled polyester and bio-based nylon fibers is based on their excellent mechanical properties and environmental friendliness, while high-elastic polyester-cotton blend fibers offer good resilience and hand feel. Plasma grafting modification significantly improves the interfacial compatibility between different fibers by introducing polar groups on the fiber surface, avoiding the problem of insufficient cohesion caused by interfacial mismatch in traditional blending processes.

[0018] Plasma-modified recycled polyester uses recycled PET (such as mineral water bottles) as raw material, which is environmentally friendly and low-cost. It provides basic strength and abrasion resistance to the fabric. Through plasma treatment, it improves the surface hydrophilicity, dyeability, and bonding strength with other fibers, solving the problems of poor moisture absorption and pilling of traditional polyester, and enhancing the overall texture of the fabric. During the plasma modification process, the vacuum degree is maintained at 30-50 Pa, and the recycled polyester fiber is laid flat with a thickness of 5-10 mm. Under an oxygen gas flow of 20-30 sccm, it reacts with the CH bonds on the polyester surface, breaking the molecular chains and introducing oxygen-containing functional groups such as -OH and -COOH. The radio frequency power is 150-200W. If the power is too low, there will be insufficient active particles, and if it is too high, the fiber surface will be over-etched and brittle. The treatment time is 60-90 seconds, and the electrode spacing is 50-60 mm (to ensure uniform plasma distribution).

[0019] Bio-based nylon is synthesized from biomass raw materials (such as corn starch and castor oil), making it more environmentally friendly than traditional petroleum-based nylon. It retains nylon's abrasion resistance, impact resistance, and elasticity, enhancing the fabric's durability and tear resistance. High-elastic polyester-cotton blend fibers, through process adjustments, give polyester the soft feel, breathability, and skin-friendliness of cotton, reducing the "stuffy" feeling of synthetic fibers and improving the fabric's stretch recovery, ensuring freedom of movement during wear (such as bending and stretching) while maintaining shape stability. Spandex is a typical elastic fiber, with 20D-40D being a medium-fine specification; a small amount added can impart elasticity to the fabric. The material's high elasticity and resilience ensure that the fabric conforms to the body's curves and is not prone to loosening, making it suitable for areas that require stretching. Long-afterglow materials (such as aluminates and silicates) are combined with fibers to absorb natural light or artificial light and then continue to glow in the dark, improving visibility at night or in low-light environments (such as night walks or outdoor work) and enhancing safety. Reflective glass microbead yarn has tiny glass microbeads (high refractive index) attached to its surface, which can reflect incident light back in the original direction, forming a strong reflection under illumination. Combined with long-afterglow luminescent yarn, this further enhances the warning effect in low-light environments.

[0020] Preferably, the multifunctional zoned warping and weaving includes the following steps: functional blended yarns, long-afterglow luminescent fiber yarns, and reflective glass microsphere yarns are wound onto independent warp beams. Subsequently, the prepared warp beams are installed on a rapier loom equipped with an electronic jacquard device for weaving. During the weaving process, the lifting and lowering movement of each warp yarn is precisely controlled by the jacquard head, forming a composite structure consisting of an alternating 2 / 1 right-hand twill base structure area and a honeycomb functional module area. The warp yarns in the 2 / 1 right-hand twill base structure area are composed primarily of functional blended yarns, interwoven with long-afterglow luminescent fiber yarns and reflective glass microsphere yarns; all weft yarns are functional blended yarns. Both the warp and weft yarns in the honeycomb functional module area are functional blended yarns. The ambient temperature during the weaving process is strictly controlled at 25℃±1℃, and the relative humidity is maintained at 65%±2%.

[0021] The 2 / 1 right-hand twill base fabric area is designed to enhance the overall strength and durability of the fabric, while the honeycomb functional module area enhances the fabric's breathability and heat and moisture management through a specific three-dimensional weaving method. The introduction of long-afterglow luminescent fiber yarns and reflective glass microbead yarns enables nighttime visual warning functionality while avoiding the sealing effect of coating methods on the original microporous structure of the fabric.

[0022] Preferably, the fabric pretreatment and critical point relaxation setting includes the following steps: The woven fabric is fed into an ultrasonic washing machine to remove residual oil, sizing agents, and other impurities using the ultrasonic cavitation effect. After washing, the wet fabric is placed in a high-pressure reactor and treated with supercritical CO2 fluid at a temperature controlled at 40±0.5℃ and a pressure increased to 10±0.2MPa, with a CO2 flow rate of 120-150L / min for 45-60 minutes. Under this environment, the fabric undergoes sufficient relaxation and shrinkage in a completely tension-free state, eliminating internal stress accumulated during the textile processing and achieving permanent stability in fabric size and structure.

[0023] Supercritical CO2 fluid combines the dissolving power of liquids with the low viscosity and high permeability of gases, enabling it to penetrate every corner of the fabric fiber network, thoroughly removing impurities and achieving uniform relaxation and setting. This step avoids the irreversible damage that traditional high-temperature setting processes may cause to high-elasticity and functional fibers.

[0024] Preferably, the nano-atomized functional finishing includes the following steps: injecting a functional finishing liquid containing self-healing phase change microcapsules and a triple color-changing composite into the storage tank of an ultrasonic atomizing device. The core component of this device is a piezoelectric ceramic atomizing head with a working frequency of 1.2 MHz, capable of efficiently atomizing the finishing liquid into tiny droplets with an average diameter of only 5 μm, forming a dense mist field. The fabric passes uniformly through a sealed chamber filled with functional droplet mist at a constant speed of 10 m / min. By controlling the fabric's running speed and the mist field concentration, the liquid application rate of the finishing liquid is ensured to be controlled between 8-12%.

[0025] The preparation method of self-healing phase change microcapsules is as follows: Dicyandiamide and epoxy resin EP828 are ultrasonically dispersed in acetone and spray-dried to form repair microspheres; the phase change microcapsules are immersed in 0.05-0.15M polydiallyldimethylammonium chloride solution and the pH is adjusted to 8.0-9.0; the negatively charged repair microspheres are mixed with the modified phase change microcapsules at a solid-liquid ratio of 1:8-1:12 and shaken for 20-40 min for adsorption; the temperature is controlled at <10℃, and 0.15-0.25mol / L pyrrole monomer is slowly added and allowed to stand for adsorption for 3-5 h; 0.45-0.65mol / L FeCl3 solution is slowly added and reacted for 3-5 h; supercritical CO2 drying is performed to remove moisture under the conditions of 30-35℃ / 7.5-8.0MPa.

[0026] The triple color-changing complex is a microcapsule complex with a core-shell structure. Its core encapsulates color-changing systems that respond to three different stimuli: heat, light, and humidity. The outer shell is a transparent polymer protective layer. The preparation method of the triple color-changing complex is as follows: Spiropyran compounds and n-octadecane are melt-mixed in a 60°C water bath and dispersed in deionized water containing sodium dodecyl sulfate under stirring at 2000 rpm. Methyl methacrylate monomer and azobisisobutyronitrile initiator are added, and the reaction is carried out at 75°C to obtain TC-MCs with a particle size of 2±0.5 μm. After centrifugation and washing, the TC-MCs are used for later use. Naphthopyran compounds are dissolved in ethyl acetate as the oil phase and slowly added dropwise to an aqueous phase containing gelatin and gum arabic. The mixture is emulsified under high-speed shear at 45°C. The pH of the emulsion is adjusted to 4.5±0.5 with 10% acetic acid solution, and the mixture is cooled to 5°C for curing. Glutaraldehyde crosslinking agent is added, and the reaction is repeated to obtain PC-MCs with a particle size of 3±0.5 μm. After filtration and drying, the PC-MCs are obtained. For later use; silica gel was impregnated in a 0.5 mol / L cobalt chloride ethanol solution, sonicated, then the solvent was removed by rotary evaporation, and then dried to obtain a blue CoCl2 / SiO2 composite powder. The composite powder was placed in a 0.1 mol / L toluene solution of silane coupling agent and refluxed for 6 hours. After filtration and washing, HSCPs were obtained. TC-MCs∶PC-MCs∶HSCPs=4∶3∶3 by mass ratio were uniformly mixed and placed in the bottom pot of a fluidized bed coating machine. First, a 2 wt% polyvinyl alcohol aqueous solution was sprayed, and then an aqueous polyurethane solution containing 0.5 wt% photoinitiator and 8 wt% solids content was sprayed. After UV irradiation, curing, and sieving, a triple color-changing composite with a particle size distribution of 15-40 μm was obtained.

[0027] The self-healing phase change microcapsules in the functional finishing solution regulate the fabric surface temperature by absorbing or releasing heat. Their polypyrrole shells selectively absorb specific wavelengths of light energy during laser micropore processing, instantaneously generating localized high temperatures of 150-180°C. This releases an epoxy resin / dicyandiamide repair agent, which, under the residual heat of the laser, penetrates into the fiber gaps at the micropore edges, undergoing a ring-opening polymerization reaction to form a cross-linked network. This repairs the tear strength loss caused by laser micropore processing, simultaneously achieving phase change temperature control and damage repair. The triple color-changing composite dynamically adjusts its color according to changes in the external environment. The extremely small droplet size allows the finishing solution to be uniformly deposited on every fiber on the fabric surface and penetrates deep into the tiny gaps between fibers, forming an extremely uniform and thin functional layer.

[0028] Preferably, the microwave catalytic fixation includes the following steps: The fabric coated with functional finishing liquid droplets is immediately fed into a continuous microwave fixation system. The main body of this system is a specially designed multimode microwave resonant cavity with an operating frequency of 2.45 GHz, capable of generating a uniform microwave field with a power density of 2 W / cm³. When the fabric passes through the microwave field, the iron oxide nanocatalyst pre-added in the finishing liquid rapidly absorbs the microwave energy and generates localized high temperatures (the surface temperature instantaneously reaches 120℃-140℃), thereby releasing the blocked isocyanate groups in the waterborne polyurethane prepolymer. The activated -NCO groups then undergo a dehydration condensation reaction with the -COOH groups introduced on the fiber surface by plasma grafting, forming strong covalent bonds (amide bonds). Simultaneously, cross-linking reactions occur between the polyurethane molecular chains, forming a three-dimensional network structure that physically encapsulates and anchors the phase change microcapsules and triple color-changing composite within the fiber network.

[0029] The microwave catalytic fixation process takes only 30 to 60 seconds. It achieves a strong bond between the functional layer and the fiber substrate through localized instantaneous high temperature, while avoiding thermal damage to the fiber material and functional molecules.

[0030] Preferably, the laser micro-hole array processing includes the following steps: The fabric is laid flat and fixed on the worktable of the laser processing platform. A CO2 laser is used to process the micro-holes in the fabric. The laser's operating parameters are set as follows: pulse repetition frequency 10kHz, single pulse energy 0.5mJ, and focused spot diameter 100μm. The laser beam precisely ablates a micro-hole array with uniform pore size (approximately 150±10μm) and pore spacing of 2±0.1mm in a specific area of ​​the fabric according to a preset program.

[0031] Laser micropore array processing is a non-contact processing method that can create additional channels for moisture and heat dissipation in areas with high perspiration or severe heat and moisture accumulation without compromising the overall structural strength and aesthetics of the fabric. This step effectively improves the fabric's dynamic heat and moisture management capabilities.

[0032] Preferably, the finishing process includes the following steps: first, the fabric after fixation is performed by low-temperature (40°C) soaping to remove unreacted finishing agents and particles floating on the surface. Then, it is dried by low-temperature (80°C) hot air while suspended without tension.

[0033] The core technical principle of this invention lies in the systematic optimization of the molecular-level synergistic design of fiber components, the composite construction of fabric microstructure, and the integrated fixation process of functional finishing and substrate. This solves the problems of insufficient multifunctional integration, mutual performance constraints, and poor durability in existing technologies. The introduction of recycled polyester fiber and bio-based nylon fiber improves the basic performance of the fabric, while high-elastic polyester-cotton blend fiber achieves comfort. The application of supercritical CO2 fluid treatment and microwave catalytic fixation processes further ensures the stability and durability of the fabric's performance.

[0034] The technical advantages of this invention are reflected in the following aspects:

[0035] In terms of composition: By selecting a variety of high-performance fibers and combining them with plasma grafting modification, the interfacial compatibility between different fibers is significantly improved, avoiding the performance degradation problem caused by interfacial mismatch during traditional blending. Meanwhile, the introduction of phase change microcapsules and a triple color-changing complex into the functional finishing liquid enables dynamic thermal and humidity management and environmental response functions.

[0036] In terms of technology: Through the innovative application of supercritical CO2 fluid treatment and microwave catalytic fixation technology, the damage to fiber materials and functional molecules caused by traditional high temperature and high pressure conditions is avoided, while ensuring a strong bond between the functional layer and the fiber substrate, significantly improving the durability of the fabric.

[0037] In summary, this invention, through the systematic design of fiber components, fabric structure, and functional finishing processes, solves the problems of insufficient multifunctional integration, mutual performance constraints, and insufficient mechanical properties in existing technologies, providing a brand-new solution for woven sports fabrics for high-intensity sports and everyday leisure scenarios. Detailed Implementation

[0038] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0039] General Implementation Examples

[0040] A high-elastic polyester-cotton blend woven sports fabric, by 100% total weight, comprises the following components:

[0041] 42.0%-45.0% plasma-modified recycled polyester

[0042] 14.2%-14.8% bio-based nylon

[0043] 14.3%-14.8% high-elastic polyester-cotton blend fiber.

[0044] 7.9%-8.5% spandex filament (20D-40D),

[0045] 12.1%-12.6% long afterglow luminescent yarn (30D),

[0046] The remaining amount is reflective glass microsphere yarn (20D);

[0047] A high-elastic polyester-cotton blend woven sports fabric is prepared through the following steps:

[0048] Step S1. Fiber blending pretreatment and Siro compact spinning:

[0049] Regenerated polyester fibers, bio-based nylon fibers, and untreated high-elastic polyester-cotton blend fibers, modified by plasma grafting, are fed into an opening device for thorough mixing. The mixed fiber bundle is then fed into the double-roller feeding zone of a Siro compact spinning machine, with the rear roller linear speed set to 18-22 m / min and the front roller linear speed being 1.15-1.25 times that of the rear roller. The fiber slivers are then spun according to the following steps: 芯： m 皮 =(35±3)%:(65±3)% is divided into two parts, which are fed into the core layer channel and the sheath layer channel respectively; spandex filaments with a specification of 20D to 40D are used as core filaments and fed into the core layer channel simultaneously with the fibers; in the compact spinning and air-gathering zone, the negative pressure is set to -10kPa to -15kPa, so that the fiber bundles are tightly bonded under the action of high-speed airflow, and finally a functional blended yarn with a clear sheath-core structure is formed, with a count range of 40S to 60S;

[0050] Step S2. Multifunctional zoned warping and weaving:

[0051] The functional blended yarns prepared above, along with long-afterglow luminescent fiber yarns and reflective glass microsphere yarns, are wound onto three independent warp beams, A, B, and C, respectively. These warp beams are mounted on a rapier loom equipped with an electronic jacquard device. The lifting and lowering movement of each warp yarn is controlled by the jacquard head, forming a composite structure consisting of an alternating 2 / 1 right-hand twill base fabric region and a honeycomb functional module region. The 2 / 1 right-hand twill base fabric region forms a twill structure through the interweaving of basic warp and weft yarns, with every two adjacent warp or weft yarns floating. The honeycomb functional module region employs a three-dimensional weaving method, forming a honeycomb structure through specific warp and weft yarn interweaving patterns. The ambient temperature in the weaving workshop is strictly controlled at 25℃±1℃, and the relative humidity is maintained at 65%±2%.

[0052] Step S3. Fabric pretreatment and critical point relaxation setting:

[0053] The woven fabric is fed into an ultrasonic washing machine. The washing solution consists of 0.5wt% tea saponin and deionized water, and the ultrasonic frequency is 40±5kHz with a power density of 1.2-1.8W / cm². 2 After cleaning, the wet blanks are placed in a high-pressure reactor and treated with supercritical CO2 fluid at a temperature of 40±0.5℃ and a pressure of 10±0.2MPa for 45-60 minutes at a CO2 flow rate of 120-150L / min. The blanks are then rehydrated and equilibrated at a temperature of 25±1℃ and a humidity of 65±2% for 4-6 hours.

[0054] Step S4. Nano-atomization function setup:

[0055] The functional finishing liquid is atomized and then adhered to the surface of the pretreated fabric;

[0056] The functional finishing solution is prepared by adding 100 parts by weight of deionized water and 1-2 parts by weight of phosphate ester dispersant to a reaction vessel and stirring at 8000 rpm for 10 min. Then, 3-5 parts by weight of nano-ferric oxide catalyst are added and ultrasonically dispersed at 40℃ for 30 min. Next, 20-30 parts by weight of triple color-changing composite and 60-80 parts by weight of self-healing phase change microcapsules are added and stirred at 4000 rpm for 5 min. Finally, 15-25 parts by weight of waterborne polyurethane adhesive are added and stirred at 2000 rpm for 3 min. The functional finishing solution is injected into the storage tank of an ultrasonic atomizing device. The piezoelectric ceramic atomizing head of the ultrasonic atomizing device operates at a frequency of 1.2 MHz to atomize the finishing solution into tiny droplets with an average diameter of 5 μm, forming a dense fog field. The fabric passes through the sealed chamber filled with functional droplet fog at a constant speed of 10 m / min. The liquid loading rate of the finishing solution is controlled between 8% and 12%.

[0057] The preparation method of self-healing phase change microcapsules is as follows: 3-8 parts of dicyandiamide and 30-50 parts of epoxy resin EP828 are ultrasonically dispersed in acetone and spray-dried to form repair microspheres; the phase change microcapsules are immersed in 0.05-0.15M polydiallyldimethylammonium chloride solution and the pH is adjusted to 8.0-9.0; the negatively charged repair microspheres are mixed with the modified phase change microcapsules at a solid-liquid ratio of 1:8-1:12 and shaken for 20-40 min for adsorption; the temperature is controlled below 10℃, and 0.15-0.25 mol / L pyrrole monomer is slowly added and allowed to stand for adsorption for 3-5 h; 0.45-0.65 mol / L FeCl3 solution is slowly added and reacted for 3-5 h; the mixture is dried with supercritical CO2 at 30-35℃ / 7.5-8.0 MPa to remove moisture.

[0058] Step S5. Microwave-catalyzed immobilization:

[0059] Fabrics coated with functional finishing liquid droplets were subjected to microwave catalytic fixation treatment. The microwave operating frequency was 2.45 GHz, and the microwave field power density was 2.0 ± 0.3 W / cm². 3 The microwave treatment time is 45±5s; this process achieves a strong bond between the functional layer and the fiber substrate through local instantaneous high temperature, while avoiding thermal damage to the fiber material and functional molecules.

[0060] Step S6. Laser micro-hole array processing:

[0061] The fabric is laid flat and fixed on the worktable of the laser processing platform; a CO2 laser (wavelength 10.6μm) is used to process micropores in the fabric. The laser operating parameters are set as follows: pulse repetition frequency 10kHz, single pulse energy 0.5mJ, and focused spot diameter 100μm; the laser beam is controlled to ablate a micropore array with uniform hole size (150±10μm) and hole spacing of 2±0.1mm in a specific area of ​​the fabric.

[0062] Step S7. Post-processing:

[0063] Use a soaping solution containing 0.8-1.2 g / L neutral soap flakes and 0.3 g / L chelating agent (EDTA-2Na) to perform a low-temperature soaping wash on the fixed fabric at 40±1℃ and a liquid flow rate of 0.5 m / s for 8-12 minutes; then dry it with low-temperature (80℃) hot air under tension-free hanging conditions.

[0064] Unless otherwise specified, the preparation process of plasma-modified recycled polyester in the following examples and comparative examples is as follows: 40 Pa, recycled polyester fiber with a thickness of 8 mm, under a 25 sccm oxygen flow, 180 W, for 80 s, to obtain plasma-modified recycled polyester.

[0065] Unless otherwise specified, the preparation method of the triple color-changing complex in the following examples and comparative examples is as follows: 10 parts of a spiropyran compound (1,3,3-trimethylindoline-6'-nitrospiropyran) and 20 parts of n-octadecane were melt-mixed in a 60°C water bath, dispersed in 100 parts of deionized water containing 3 parts of sodium dodecyl sulfate under stirring at 2000 rpm, 5 parts of methyl methacrylate monomer and 0.1 parts of azobisisobutyronitrile initiator were added, and the reaction was carried out at 75°C for 4 hours to obtain T particles with a particle size of 2 μm. C-MCs were centrifuged and washed for later use. Eight parts of a naphthopyran compound (2,2-diphenyl-2H-naphtho[1,2-b]pyran) were dissolved in 15 parts of ethyl acetate as the oil phase, and slowly added dropwise to 100 parts of an aqueous phase containing 2 parts of gelatin and 1 part of gum arabic. The emulsion was emulsified at 45°C and 5000 rpm for 10 min using high-speed shearing. The pH of the emulsion was adjusted to 4.5 with 10% acetic acid solution, and the mixture was cooled to 5°C and cured for 3 hours. 0.5 parts of glutaraldehyde crosslinking agent were added, and the reaction continued for another hour to obtain a particle size of 3... μm PC-MCs were filtered, dried, and set aside for later use. 15 parts of silica gel were impregnated in 20 parts of 0.5 mol / L cobalt chloride ethanol solution, sonicated for 30 min, and the solvent was removed by rotary evaporation at 60 °C. The mixture was then dried at 105 °C for 2 hours to obtain a blue CoCl2 / SiO2 composite powder. This composite powder was placed in a 0.1 mol / L KH-570 toluene solution and refluxed for 6 hours. After filtration and washing, HSCPs were obtained. The three pretreated functional units were then sorted according to their properties. The TC-MCs:PC-MCs:HSCPs ratio of 4:3:3 was uniformly mixed and placed in the bottom pot of a fluidized bed coating machine. The fluidized bed was started, with an inlet air temperature of 40℃, a material temperature of 35℃, and an atomization pressure of 0.25MPa. A 2wt% polyvinyl alcohol aqueous solution was sprayed at a rate of 5mL / min, followed by an aqueous polyurethane solution containing 0.5wt% photoinitiator and a solid content of 8wt% sprayed at a rate of 10mL / min using a 365nm ultraviolet lamp at 30mW / cm². 2 Irradiate with high intensity for 3 minutes, mature at 50℃ for 6 hours, and sieve through 150-200 mesh to obtain a triple color-changing composite with a particle size distribution of 15-40μm.

[0066] Example 1

[0067] A high-elastic polyester-cotton blend woven sports fabric, by 100% total weight, comprises the following components:

[0068] 43.0% plasma-modified recycled polyester

[0069] 14.5% bio-based nylon

[0070] 14.5% high-elastic polyester-cotton blend fiber,

[0071] 8.3% spandex filament (30D),

[0072] 12.5% ​​long afterglow luminescent yarn (30D),

[0073] The remaining amount is reflective glass microsphere yarn (20D);

[0074] A high-elastic polyester-cotton blend woven sports fabric is prepared through the following steps:

[0075] Step S1. Fiber blending pretreatment and Siro compact spinning:

[0076] Regenerated polyester fibers modified by plasma grafting, bio-based nylon fibers, and untreated high-elastic polyester-cotton blend fibers are fed into an opening device for thorough mixing. The mixed fiber bundle is then fed into the double-roller feeding zone of a Siro compact spinning machine, with the rear roller linear speed set to 20 m / min and the front roller linear speed being 1.2 times that of the rear roller. The fiber sliver is then spun at m... 芯： m 皮 =35%:65% is divided into two parts, which are fed into the core layer channel and the sheath layer channel respectively; 30D spandex filament is used as the core filament and fed into the core layer channel at the same time; in the compact spinning air-gathering zone, the negative pressure is set to -12.5kPa, so that the fiber bundles are tightly bonded under the action of high-speed airflow, and finally a functional blended yarn with a clear sheath-core structure is formed, with a count of 50S;

[0077] Step S2. Multifunctional zoned warping and weaving:

[0078] The functional blended yarns prepared above, along with long-afterglow luminescent fiber yarns and reflective glass microsphere yarns, are wound onto three independent warp beams, A, B, and C, respectively. These warp beams are mounted on a rapier loom equipped with an electronic jacquard device. The lifting and lowering movement of each warp yarn is controlled by the jacquard head, forming a composite weave structure composed of an alternating 2 / 1 right-hand twill base structure area and a honeycomb functional module area. The 2 / 1 right-hand twill base structure area forms a twill structure through the interweaving of basic warp and weft yarns, with every two adjacent warp or weft yarns floating up. The honeycomb functional module area employs a three-dimensional weaving method, forming a honeycomb structure through specific warp and weft yarn interweaving patterns. The ambient temperature in the weaving workshop is strictly controlled at 25℃, and the relative humidity is maintained at 65%.

[0079] Step S3. Fabric pretreatment and critical point relaxation setting:

[0080] The woven fabric is fed into an ultrasonic washing machine. The washing solution consists of 0.5 wt% tea saponin and deionized water, and the ultrasonic frequency is 40 kHz with a power density of 1.5 W / cm². 2After cleaning, the wet blanks are placed in a high-pressure reactor and treated with supercritical CO2 fluid at a temperature of 40℃ and a pressure of 10MPa for 50 minutes at a CO2 flow rate of 135L / min. The blanks are then rehydrated and equilibrated at a temperature of 25℃ and a humidity of 65% for 5 hours.

[0081] Step S4. Nano-atomization function setup:

[0082] The functional finishing liquid is atomized and then adhered to the surface of the pretreated fabric;

[0083] The functional finishing solution was prepared by adding 100 parts by weight of deionized water and 1.5 parts by weight of phosphate ester dispersant to a reaction vessel and stirring at 8000 rpm for 10 min. Then, 4 parts by weight of nano-ferric oxide catalyst were added and ultrasonically dispersed at 40℃ for 30 min. Next, 25 parts by weight of triple color-changing composite and 70 parts by weight of self-healing phase change microcapsules were added and stirred at 4000 rpm for 5 min. Finally, 20 parts by weight of waterborne polyurethane adhesive were added and stirred at 2000 rpm for 3 min. The functional finishing solution was injected into the storage tank of an ultrasonic atomizing device. The piezoelectric ceramic atomizing head of the ultrasonic atomizing device operated at a frequency of 1.2 MHz to atomize the finishing solution into tiny droplets with an average diameter of 5 μm, forming a dense fog field. The fabric passed through the sealed chamber filled with functional droplet fog at a constant speed of 10 m / min. The liquid loading rate of the finishing solution was controlled at 10%.

[0084] Unless otherwise specified, the preparation process of the self-healing phase change microcapsules in the following examples and comparative examples is as follows: 5 parts of dicyandiamide and 20 parts of epoxy resin EP828 are ultrasonically dispersed in acetone and spray-dried to form repair microspheres; the phase change microcapsules are immersed in 0.1M polydiallyldimethylammonium chloride solution and the pH is adjusted to 8.5; the negatively charged repair microspheres are mixed with the modified phase change microcapsules at a solid-liquid ratio of 1:10 and shaken for 30 min for adsorption; the temperature is controlled at 8℃, and 0.2 mol / L pyrrole monomer is slowly added and allowed to stand for adsorption for 4 h; 0.5 mol / L FeCl3 solution is slowly added and reacted for 4 h; the mixture is dried with supercritical CO2 at 33℃ / 7.8 MPa to remove moisture;

[0085] Step S5. Microwave-catalyzed immobilization:

[0086] Fabrics coated with functional finishing liquid droplets were subjected to microwave catalytic fixation treatment. The microwave operating frequency was 2.45 GHz, and the microwave field power density was 2.0 W / cm². 3 The microwave treatment time is 45 seconds. This process achieves a strong bond between the functional layer and the fiber substrate through localized instantaneous high temperature, while avoiding thermal damage to the fiber material and functional molecules.

[0087] Step S6. Laser micro-hole array processing:

[0088] The fabric is laid flat and fixed on the worktable of the laser processing platform; a CO2 laser (wavelength 10.6μm) is used to process micropores in the fabric. The laser operating parameters are set as follows: pulse repetition frequency 10kHz, single pulse energy 0.5mJ, and focused spot diameter 100μm; the laser beam is controlled to ablate a micropore array with uniform hole diameter (approximately 150μm) and hole spacing of 2mm in a specific area of ​​the fabric.

[0089] Step S7. Post-processing:

[0090] The fabric, after being fixed, was subjected to a low-temperature soaping process at 40°C and a flow rate of 0.5 m / s using a soaping solution containing 1.0 g / L neutral soap flakes and 0.3 g / L chelating agent (EDTA-2Na) for 10 minutes. Subsequently, it was dried by low-temperature (80°C) hot air while suspended without tension.

[0091] Example 2

[0092] A high-elastic polyester-cotton blend woven sports fabric, by 100% total weight, comprises the following components:

[0093] 42.0% plasma-modified recycled polyester

[0094] 14.2% bio-based nylon

[0095] 14.3% high-elastic polyester-cotton blend fiber

[0096] 7.9% spandex filament (30D),

[0097] 12.1% long afterglow luminescent yarn (30D),

[0098] The remaining amount is reflective glass microsphere yarn (20D);

[0099] A high-elastic polyester-cotton blend woven sports fabric is prepared through the following steps:

[0100] Step S1. Fiber blending pretreatment and Siro compact spinning:

[0101] Regenerated polyester fibers modified by plasma grafting, bio-based nylon fibers, and untreated high-elastic polyester-cotton blend fibers are fed into an opening device for thorough mixing. The mixed fiber bundle is then fed into the double-roller feeding zone of a Siro compact spinning machine, with the rear roller linear speed set to 20 m / min and the front roller linear speed being 1.2 times that of the rear roller. The fiber sliver is then spun at m... 芯： m 皮=35%:65% is divided into two parts, which are fed into the core layer channel and the sheath layer channel respectively; 30D spandex filament is used as the core filament and fed into the core layer channel at the same time; in the compact spinning air-gathering zone, the negative pressure is set to -15kPa, so that the fiber bundles are tightly attached under the action of high-speed airflow, and finally a functional blended yarn with a clear sheath-core structure is formed, with a count of 50S.

[0102] Step S2. Multifunctional zoned warping and weaving:

[0103] The functional blended yarns prepared above, along with long-afterglow luminescent fiber yarns and reflective glass microsphere yarns, are wound onto three independent warp beams, A, B, and C, respectively. These warp beams are mounted on a rapier loom equipped with an electronic jacquard device. The lifting and lowering movement of each warp yarn is controlled by the jacquard head, forming a composite weave structure composed of an alternating 2 / 1 right-hand twill base structure area and a honeycomb functional module area. The 2 / 1 right-hand twill base structure area forms a twill structure through the interweaving of basic warp and weft yarns, with every two adjacent warp or weft yarns floating up. The honeycomb functional module area employs a three-dimensional weaving method, forming a honeycomb structure through specific warp and weft yarn interweaving patterns. The ambient temperature in the weaving workshop is strictly controlled at 25℃, and the relative humidity is maintained at 65%.

[0104] Step S3. Fabric pretreatment and critical point relaxation setting:

[0105] The woven fabric is fed into an ultrasonic washing machine. The washing solution consists of 0.5 wt% tea saponin and deionized water, and the ultrasonic frequency is 40 kHz with a power density of 1.5 W / cm². 2 After cleaning, the wet blanks are placed in a high-pressure reactor and treated with supercritical CO2 fluid at a temperature of 40℃ and a pressure of 10MPa for 50 minutes at a CO2 flow rate of 150L / min. The blanks are then rehydrated and equilibrated at a temperature of 25℃ and a humidity of 65% for 5 hours.

[0106] Step S4. Nano-atomization function setup:

[0107] The functional finishing liquid is atomized and then adhered to the surface of the pretreated fabric;

[0108] The functional finishing solution was prepared by adding 100 parts by weight of deionized water and 1.5 parts by weight of phosphate ester dispersant to a reaction vessel and stirring at 8000 rpm for 10 min. Then, 4 parts by weight of nano-ferric oxide catalyst were added and ultrasonically dispersed at 40℃ for 30 min. Next, 25 parts by weight of triple color-changing composite and 70 parts by weight of self-healing phase change microcapsules were added and stirred at 4000 rpm for 5 min. Finally, 20 parts by weight of waterborne polyurethane adhesive were added and stirred at 2000 rpm for 3 min. The functional finishing solution was then injected into the storage tank of an ultrasonic atomizing device. The piezoelectric ceramic atomizing head of the ultrasonic atomizing device operated at a frequency of 1.2 MHz to atomize the finishing solution into tiny droplets with an average diameter of 5 μm, forming a dense fog field. The fabric passed through the sealed chamber filled with functional droplet fog at a constant speed of 10 m / min, and the liquid loading rate of the finishing solution was controlled at 12%.

[0109] The preparation method of self-healing phase change microcapsules is as follows: 3 parts dicyandiamide and 30 parts epoxy resin EP828 are ultrasonically dispersed in acetone and spray-dried to form repair microspheres; the phase change microcapsules are immersed in 0.05M polydiallyldimethylammonium chloride solution and the pH is adjusted to 8.0; the negatively charged repair microspheres are mixed with the modified phase change microcapsules at a solid-liquid ratio of 1:8 and shaken for 20 min for adsorption; the temperature is controlled at 8℃, and 0.15 mol / L pyrrole monomer is slowly added and allowed to stand for 3 h for adsorption; 0.45 mol / L FeCl3 solution is slowly added and reacted for 3 h; the mixture is dried with supercritical CO2 at 30℃ / 7.5 MPa to remove moisture.

[0110] Step S5. Microwave-catalyzed immobilization:

[0111] Fabrics coated with functional finishing liquid droplets were subjected to microwave catalytic fixation treatment. The microwave operating frequency was 2.45 GHz, and the microwave field power density was 2.0 W / cm². 3 The microwave treatment time is 45 seconds. This process achieves a strong bond between the functional layer and the fiber substrate through localized instantaneous high temperature, while avoiding thermal damage to the fiber material and functional molecules.

[0112] Step S6. Laser micro-hole array processing:

[0113] The fabric is laid flat and fixed on the worktable of the laser processing platform; a CO2 laser (wavelength 10.6μm) is used to process micropores in the fabric. The laser operating parameters are set as follows: pulse repetition frequency 10kHz, single pulse energy 0.5mJ, and focused spot diameter 100μm; the laser beam is controlled to ablate a micropore array with uniform hole diameter (approximately 150μm) and hole spacing of 2mm in a specific area of ​​the fabric.

[0114] Step S7. Post-processing:

[0115] The fabric, after being fixed, was subjected to a low-temperature soaping process at 40°C and a flow rate of 0.5 m / s using a soaping solution containing 1.0 g / L neutral soap flakes and 0.3 g / L chelating agent (EDTA-2Na) for 10 minutes. Subsequently, it was dried by low-temperature (80°C) hot air while suspended without tension.

[0116] Example 3

[0117] A high-elastic polyester-cotton blend woven sports fabric, by 100% total weight, comprises the following components:

[0118] 45% plasma-modified recycled polyester,

[0119] 14.8% bio-based nylon

[0120] 14.8% high-elastic polyester-cotton blend fiber

[0121] 8.5% spandex filament (30D),

[0122] 12.6% long afterglow luminescent yarn (30D),

[0123] The remaining amount is reflective glass microsphere yarn (20D);

[0124] A high-elastic polyester-cotton blend woven sports fabric is prepared through the following steps:

[0125] Step S1. Fiber blending pretreatment and Siro compact spinning:

[0126] Regenerated polyester fibers modified by plasma grafting, bio-based nylon fibers, and untreated high-elastic polyester-cotton blend fibers are fed into an opening device for thorough mixing. The mixed fiber bundle is then fed into the double-roller feeding zone of a Siro compact spinning machine, with the rear roller linear speed set to 20 m / min and the front roller linear speed being 1.2 times that of the rear roller. The fiber sliver is then spun at m... 芯： m 皮 =35%:65% is divided into two parts, which are fed into the core layer channel and the sheath layer channel respectively; 30D spandex filament is used as the core filament and fed into the core layer channel at the same time; in the compact spinning air-gathering zone, the negative pressure is set to -12.5kPa, so that the fiber bundles are tightly bonded under the action of high-speed airflow, and finally a functional blended yarn with a clear sheath-core structure is formed, with a count of 50S;

[0127] Step S2. Multifunctional zoned warping and weaving:

[0128] The functional blended yarns prepared above, along with long-afterglow luminescent fiber yarns and reflective glass microsphere yarns, are wound onto three independent warp beams, A, B, and C, respectively. These warp beams are mounted on a rapier loom equipped with an electronic jacquard device. The lifting and lowering movement of each warp yarn is controlled by the jacquard head, forming a composite weave structure composed of an alternating 2 / 1 right-hand twill base structure area and a honeycomb functional module area. The 2 / 1 right-hand twill base structure area forms a twill structure through the interweaving of basic warp and weft yarns, with every two adjacent warp or weft yarns floating up. The honeycomb functional module area employs a three-dimensional weaving method, forming a honeycomb structure through specific warp and weft yarn interweaving patterns. The ambient temperature in the weaving workshop is strictly controlled at 25℃, and the relative humidity is maintained at 65%.

[0129] Step S3. Fabric pretreatment and critical point relaxation setting:

[0130] The woven fabric is fed into an ultrasonic washing machine. The washing solution consists of 0.5 wt% tea saponin and deionized water, and the ultrasonic frequency is 40 kHz with a power density of 1.5 W / cm². 2 After cleaning, the wet blanks are placed in a high-pressure reactor and treated with supercritical CO2 fluid at a temperature of 40℃ and a pressure of 10MPa for 50 minutes at a CO2 flow rate of 135L / min. The blanks are then rehydrated and equilibrated at a temperature of 25℃ and a humidity of 65% for 5 hours.

[0131] Step S4. Nano-atomization function setup:

[0132] The functional finishing liquid is atomized and then adhered to the surface of the pretreated fabric;

[0133] The functional finishing solution was prepared by adding 100 parts by weight of deionized water and 1.5 parts by weight of phosphate ester dispersant to a reaction vessel and stirring at 8000 rpm for 10 min. Then, 3 parts by weight of nano-ferric oxide catalyst were added and ultrasonically dispersed at 40℃ for 30 min. Next, 25 parts by weight of triple color-changing composite and 70 parts by weight of self-healing phase change microcapsules were added and stirred at 4000 rpm for 5 min. Finally, 20 parts by weight of waterborne polyurethane adhesive were added and stirred at 2000 rpm for 3 min. The functional finishing solution was then injected into the storage tank of an ultrasonic atomizing device. The piezoelectric ceramic atomizing head of the ultrasonic atomizing device operated at a frequency of 1.2 MHz to atomize the finishing solution into tiny droplets with an average diameter of 5 μm, forming a dense fog field. The fabric passed through the sealed chamber filled with functional droplet fog at a constant speed of 10 m / min, and the liquid loading rate of the finishing solution was controlled at 10%.

[0134] The preparation method of self-healing phase change microcapsules is as follows: 8 parts of dicyandiamide and 50 parts of epoxy resin EP828 are ultrasonically dispersed in acetone and spray-dried to form repair microspheres; the phase change microcapsules are immersed in 0.15M polydiallyldimethylammonium chloride solution and the pH is adjusted to 9.0; the negatively charged repair microspheres are mixed with the modified phase change microcapsules at a solid-liquid ratio of 1:12 and shaken for 40 min for adsorption; the temperature is controlled at 8℃, and 0.25 mol / L pyrrole monomer is slowly added and allowed to stand for adsorption for 3-5 h; 0.65 mol / L FeCl3 solution is slowly added and reacted for 5 h; the mixture is dried with supercritical CO2 at 35℃ / 8.0 MPa to remove moisture.

[0135] Step S5. Microwave-catalyzed immobilization:

[0136] Fabrics coated with functional finishing liquid droplets were subjected to microwave catalytic fixation treatment. The microwave operating frequency was 2.45 GHz, and the microwave field power density was 2.0 W / cm². 3 The microwave treatment time is 45 seconds. This process achieves a strong bond between the functional layer and the fiber substrate through localized instantaneous high temperature, while avoiding thermal damage to the fiber material and functional molecules.

[0137] Step S6. Laser micro-hole array processing:

[0138] The fabric is laid flat and fixed on the worktable of the laser processing platform; a CO2 laser (wavelength 10.6μm) is used to process micropores in the fabric. The laser operating parameters are set as follows: pulse repetition frequency 10kHz, single pulse energy 0.5mJ, and focused spot diameter 100μm; the laser beam is controlled to ablate a micropore array with uniform hole diameter (approximately 150μm) and hole spacing of 2mm in a specific area of ​​the fabric.

[0139] Step S7. Post-processing:

[0140] The fabric, after being fixed, was subjected to a low-temperature soaping process at 40°C and a flow rate of 0.5 m / s using a soaping solution containing 1.0 g / L neutral soap flakes and 0.3 g / L chelating agent (EDTA-2Na) for 10 minutes. Subsequently, it was dried by low-temperature (80°C) hot air while suspended without tension.

[0141] Comparative Example 1

[0142] The difference from Example 1 is that in step S1, the recycled polyester fibers and bio-based nylon fibers are not subjected to plasma grafting treatment.

[0143] Comparative Example 2

[0144] The difference from Example 1 is that in step S2, a conventional weaving method is used;

[0145] Comparative Example 3

[0146] The difference from Example 1 is that in step S2, there are no long afterglow luminescent fiber yarns and reflective glass microsphere yarns, and a reflective coating scheme is used.

[0147] Comparative Example 4

[0148] The difference from Example 1 is that in step S3, a traditional high-temperature setting process is used;

[0149] Comparative Example 5

[0150] The difference from Example 1 is that step S6 does not involve laser micro-hole array processing;

[0151] Comparative Example 6

[0152] The difference from Example 1 is that no nano-iron oxide catalyst is added in step S4;

[0153] Comparative Example 7

[0154] The difference from Example 1 is that in step S4, the amount of nano-iron oxide catalyst is 10 parts;

[0155] Comparative Example 8

[0156] The difference from Example 1 is that in step S5, the microwave processing time is 2 minutes;

[0157] Comparative Example 9

[0158] The difference from Example 1 is that in step S7, the drying temperature is 120°C.

[0159] Comparative Example 10

[0160] The difference from Example 1 is that in step S4, the self-healing phase change microcapsules are replaced with untreated ordinary phase change microcapsules.

[0161] Performance testing methods and standards:

[0162] 1. Breaking strength (N / 5cm): Refer to GB / T3923.1-2013 "Textiles - Tensile properties of fabrics - Part 1: Determination of breaking strength and elongation at break (strip method)";

[0163] Test sample specifications: Cut samples with dimensions of 5cm (width) × 20cm (length) along the warp and weft directions respectively, and take 5 parallel samples for each test group;

[0164] Testing environment: Temperature 23±2℃, relative humidity 65±5% RH;

[0165] Test parameters: stretching speed 100mm / min, clamping distance 100mm.

[0166] 2. Elastic recovery rate (%):

[0167] Test sample specifications: Cut the sample to a size of 5cm (width) × 15cm (length), and take 5 parallel samples for each test group;

[0168] Testing environment: Temperature 23±2℃, relative humidity 65±5% RH;

[0169] Test parameters: Pre-tension 2N, stretch to 20% elongation and hold for 30s, release and let stand for 60s, then calculate the elastic recovery rate.

[0170] 3. Air permeability (mm / s): Refer to ISO 9237:1995 "Textiles - Determination of air permeability of fabrics";

[0171] Test sample specifications: Cut circular test specimens with a diameter of 12.7cm, and take 5 parallel samples for each test group (taken from the twill area and honeycomb area respectively).

[0172] Testing environment: Temperature 23±2℃, relative humidity 65±5% RH;

[0173] Test parameters: Test area 20cm² 2 The pressure difference is 100 Pa.

[0174] 4. Moisture permeability (g / m 2 • 24h): Refer to GB / T12704.1-2021 "Textiles - Determination of moisture permeability of fabrics - Part 1: Moisture absorption method" (Method B);

[0175] Test sample specifications: Cut the sample to a size of 10cm×10cm, and take 3 parallel samples for each test group;

[0176] Testing environment: Temperature 38±2℃, relative humidity 90±2% RH (wet side); 38±2℃, relative humidity 45±5% RH (dry side);

[0177] Test parameters: Permeability cup area 38.48cm² 2 The test lasted 24 hours.

[0178] The test results are shown in Table 1.

[0179] Table 1 Performance test results of the examples and comparative examples

[0180]

[0181] This invention achieves a breakthrough through a synergistic effect of core-sheath yarn structure, supercritical relaxation, and microwave bonding: In the core-sheath yarn structure, the spandex core layer and the recycled polyester / bio-based nylon sheath layer form a stress gradient distribution, imparting high resilience; supercritical CO2 fluid penetrates deep into the fiber network at 10 MPa without damage, eliminating internal stress and improving dimensional stability to a warp and weft shrinkage rate of ≤0.8%; microwave-catalyzed Fe3O4-induced localized high temperature (130°C) triggers directional bonding of amide bonds (bond energy 340 kJ / mol), anchoring phase change microcapsules and color-changing composites at the fiber interface. These three elements synergistically overcome the technical contradiction of achieving high elasticity, comfort, and intelligent response simultaneously in sports fabrics.

[0182] Each comparative example lacks or alters key technical features from the embodiments, disrupting the synergistic effect between fiber components, fabric structure, and process parameters, thus resulting in performance differences compared to the embodiments:

[0183] Comparative Example 1 did not involve plasma grafting modification of recycled polyester and bio-based nylon, so polar groups could not be introduced onto the fiber surface. Compared with the improved inter-fiber interface compatibility in the example, the cohesion between different fibers was significantly insufficient, ultimately weakening the overall mechanical properties of the fabric.

[0184] Comparative Example 2 uses a conventional weaving method and does not construct the composite structure of 2 / 1 right twill and honeycomb weave interlaced as in the example. It loses the three-dimensional breathable chambers unique to honeycomb weave and cannot achieve a balance between mechanical strength and breathability through the composite structure as in the example, resulting in deterioration of breathability and moisture permeability.

[0185] In Comparative Example 3, a reflective coating was used instead of the reflective glass microbead yarn and long afterglow luminescent yarn of the embodiment. The coating would close the original microporous structure of the fabric and hinder the flow of moisture and heat. This is contrary to the design of avoiding micropore closure by yarn inlay in the embodiment. Therefore, the breathability and moisture permeability are greatly reduced.

[0186] Comparative Example 4 uses a traditional high-temperature setting process instead of the supercritical CO2 low-temperature relaxation setting process used in the Example. High temperature can cause thermal damage to the molecular chains of high-elastic fibers (such as spandex) and embrittlement of functional fiber structures. At the same time, the residual internal stress can also disrupt the elastic recovery balance of the fabric, resulting in lower elasticity and mechanical strength than in the Example.

[0187] Comparative Example 5 did not undergo laser micropore array processing and lacked the additional ventilation channels designed for non-honeycomb areas in the examples. It could not meet the rapid moisture dissipation requirements of areas with heat and moisture accumulation, and its air permeability and moisture permeability were naturally inferior to those of the examples.

[0188] Comparative Example 6 did not add nano-iron oxide catalyst, and could not generate local instantaneous high temperature by absorbing microwave energy through catalyst as in the example. This resulted in insufficient desealing of isocyanate groups in waterborne polyurethane and insufficient covalent bonding between the functional layer and the fiber substrate. Although it had little impact on the basic mechanical properties, the functional layer was prone to falling off during long-term use, which indirectly affected the overall performance stability.

[0189] In Comparative Example 7, an excessive amount of nano-ferric oxide catalyst was added, exceeding the reasonable dosage range of the examples. After the nanoparticles agglomerated, uneven microwave energy absorption occurred, and local overheating damaged the fiber structure and functional molecules, destroying the fixation effect of the catalyst precisely controlled in the examples, thereby reducing the mechanical properties and functional stability of the fabric.

[0190] Comparative Example 8 extended the microwave treatment time to 2 minutes, which far exceeded the 45±5 seconds of the Example. Excessive microwave treatment can cause the molecular chains of elastic fibers such as spandex to depolymerize, disrupting the stress balance of the core-sheath yarn structure. This is inconsistent with the design concept of achieving efficient fixation without damaging the fibers through short-time microwave treatment in the Example, resulting in a significant decrease in the breaking strength of the fabric.

[0191] Comparative Example 9 increased the drying temperature to 120°C, which is higher than the low-temperature hot air temperature of 80°C in the Example. The high temperature will destroy the crystal structure of the luminescent material in the long afterglow luminescent yarn and the surface optical properties of the reflective glass microsphere yarn. At the same time, it may cause residual stress inside the fiber, affecting the elasticity of the fabric and the integrity of the breathable structure. Naturally, the performance is not as good as that of the Example.

[0192] Comparative Example 10 uses ordinary phase change microcapsules instead of the self-healing phase change microcapsules of the examples. It lacks the function of releasing repair agents during laser processing and repairing microporous edge fiber damage through epoxy resin and dicyandiamide polymerization. The damage to the microporous edge fiber structure not only weakens the local mechanical properties of the fabric, but also reduces the efficiency of the air permeability channel due to the irregularity of the microporous edges, resulting in lower air permeability and moisture permeability than the examples.

Claims

1. A process for the preparation of a high stretch polyester cotton blended woven sportswear fabric characterized in that, The method comprises the following steps: S1. Fiber blending pretreatment and Siro compact spinning: Plasma modified regenerated polyester fibers, bio-based polyamide fibers and high-elasticity polyester cotton-like fibers are opened and mixed, and then fed into the double roller feeding area of a Siro compact spinning machine. The mass ratio of the core layer to the skin layer is 32-38%: 62-68%. Spandex filaments are fed into the core layer channel as core filaments. Under negative pressure, 40-60S skin-core structure blended yarns are prepared; S2. Multi-functional zoned warping and weaving: The blended yarns, long afterglow yarns and reflective glass bead yarns are divided into separate warp beams. The warp yarns are raised and lowered by an electronic jacquard device to weave a fabric with a 2 / 1 right twill and a honeycomb weave interlaced composite structure; S3. Fabric pretreatment and critical point relaxation setting: The fabric is washed with ultrasonic waves and treated with supercritical CO2 at 40±0.5℃, 10±0.2MPa and a CO2 flow rate of 120-150L / min for 45-60min. After moisture balance, a pretreated fabric is obtained; S4. Nano-atomized functional finishing: A functional finishing liquid is atomized and attached to the surface of the pretreated fabric; The functional finishing liquid comprises, by weight, 100 parts of deionized water, 1-2 parts of a phosphate dispersant, 3-5 parts of nano-iron oxide, 20-30 parts of a triple color-changing complex, 60-80 parts of self-repairing phase change microcapsules and 15-25 parts of a water-based polyurethane adhesive; S5. Microwave catalytic fixation; S6. Laser micro-hole array processing: A CO2 laser is used to ablate a micro-hole array with a hole diameter of 150±10μm and a hole spacing of 2.0±0.1mm in the non-honeycomb area of the pretreated fabric; S7. Finishing: soaping, drying and obtaining a finished product; The preparation sequence of the functional finishing liquid in S4 is as follows: (a) Mix deionized water and a dispersant at 8000rpm for 10min; (b) Add nano-iron oxide and ultrasonically disperse at 40℃ for 30min; (c) Add a triple color-changing complex and self-repairing phase change microcapsules and mix at 4000rpm for 5min; (d) Add a water-based polyurethane adhesive and mix at 2000rpm for 3min; The preparation method of the self-repairing phase change microcapsules is as follows: dicyandiamide and epoxy resin EP828 are ultrasonically dispersed in acetone, and spray dried to form repair microspheres. The phase change microcapsules are immersed in a 0.05-0.15M polydiallyldimethylammonium chloride solution, and the pH is adjusted to 8.0-9.

0. The negatively charged repair microspheres are mixed with modified phase change microcapsules at a solid-liquid ratio of 1:8-1:12, and shaken for 20-40min. The temperature is controlled at <10℃, 0.15-0.25mol / L pyrrole monomer is slowly added, and the mixture is left to stand for 3-5h. 0.45-0.65mol / L FeCl3 solution is slowly added, and the mixture is reacted for 3-5h. The mixture is dried under supercritical CO2 at 30-35℃ / 7.5-8.0MPa to remove water. The preparation method of the triple color-changing complex is: melt mixing spiropyran compound and n-octadecane in a 60 DEG C water bath, dispersing into deionized water containing sodium dodecyl sulfate under stirring at 2000 rpm, adding methyl methacrylate monomer and azobisisobutyronitrile initiator, and reacting at 75 DEG C to obtain TC-MCs with a particle size of 2+ / -0.5 mu m, which is centrifuged and washed for standby; The naphthopyran compound is dissolved in ethyl acetate as an oil phase, slowly added dropwise into an aqueous phase containing gelatin and gum arabic, emulsified at high speed at 45 DEG C, the pH of the emulsion is adjusted to 4.5+ / -0.5 with 10% acetic acid solution, and the temperature is lowered to 5 DEG C for solidification, and then glutaraldehyde crosslinking agent is added for reaction to obtain PC-MCs with a particle size of 3+ / -0.5 mu m, which is filtered and dried for standby; The silica gel is immersed in a 0.5 mol / L cobalt chloride ethanol solution, ultrasonically treated, and then rotary evaporated to remove the solvent, and dried to obtain blue CoCl2 / SiO2 composite powder, which is placed in a 0.1 mol / L silane coupling agent toluene solution, refluxed for 6 hours, filtered and washed to obtain HSCPs; The TC-MCs, PC-MCs and HSCPs are uniformly mixed in a mass ratio of 4:3:3, placed in the bottom pot of a fluidized bed coating machine, and then sprayed with 2 wt% polyvinyl alcohol aqueous solution, and then sprayed with 0.5 wt% photoinitiator and 8 wt% waterborne polyurethane solution with solid content of 8 wt%, irradiated with ultraviolet lamp, aged, and sieved to obtain triple color-changing complexes with a particle size distribution of 15-40 mu m.

2. A process for making high stretch polyester cotton blended woven sportswear fabric as claimed in claim 1 wherein, The specification of the spandex filament is 20D to 40D; the specification of the long afterglow light yarn is 30D; the specification of the reflective glass bead yarn is 20D; the preparation process of the plasma modified regenerated polyester is: 30-50 Pa, the regenerated polyester fiber is laid flat with a thickness of 5-10 mm, an oxygen gas flow of 20-30 sccm, a treatment of 150-200 W for 60-90 s, and the plasma modified regenerated polyester is obtained.

3. The process for making high stretch polyester cotton blended woven sportswear fabric as claimed in claim 1 wherein, The negative pressure condition in S1 is -12+ / -2 kPa.

4. The process for making high stretch polyester cotton blended woven sportswear fabric as claimed in claim 1 wherein, The process of ultrasonic washing in S3 is: 0.5wt% tea saponin solution, 40±5 kHz, 1.2-1.8 W / cm 2 , processing 8-12 min; the process of moisture regain balance is: 25±1℃, 65±2%RH, 4-6h.

5. The process for making high stretch polyester cotton blended woven sportswear fabric as claimed in claim 1 wherein, The parameters for ablating the non-honeycomb area of the pretreated fabric using a CO2 laser are: wavelength 10.6 mu m, pulse frequency 10 kHz, single pulse energy 0.5 mJ, and spot diameter 100 mu m.

6. The process for making high stretch polyester cotton blended woven sportswear fabric as claimed in claim 1 wherein, The process technology of the soaping is: 0.8-1.2 g / L neutral soap, 0.3 g / L EDTA-2Na, 40+ / -1 DEG C, 0.5 m / s liquid flow, and 8-12 min; the process technology of the drying is: tensionless suspension and 80 DEG C hot air drying.

7. A high stretch polyester cotton blended woven sportswear fabric characterized in that, The high-elasticity polyester cotton blended woven sports fabric is prepared by the preparation method of any one of claims 1-6.

Images