Preparation process of multifunctional composite fiber textile product

Abstract

The invention relates to the technical field of textile products, in particular to a preparation process of a multifunctional composite fiber textile product, which comprises the following steps: step 1, multi-type fiber customization pretreatment: S1.1, raw material screening: weighing 60-70 parts by mass of polyester fiber, 15-20 parts by mass of graphene modified viscose fiber, 10-15 parts by mass of bamboo fiber and 5-10 parts by mass of chitin fiber, respectively removing impurities, carding and opening; multi-dimensional function integration of antibiosis (the bacteriostasis rate is larger than or equal to 99%), wear resistance (Martindale wear resistance times are larger than or equal to 50,000), heat preservation (the heat conduction coefficient is smaller than or equal to 0.035 W / (mK)) and moisture absorption and sweat releasing (the wicking height is larger than or equal to 10 cm / 30 min) is achieved, antagonism does not exist among functions, and the function retention rate is larger than or equal to 85% after 50 times of washing; through composite pretreatment of plasma modification and coupling agent grafting, the bonding strength of different fiber interfaces is improved by 40% or above, a finished product is free of layering and stripping phenomena after being washed for 50 times, and the mechanical property stability is improved by 35%.

Description

Technical Field

[0001] This invention relates to the field of textile technology, specifically to the preparation process of multifunctional composite fiber textile products. Background Technology

[0002] Composite fiber textiles, with their advantages of being lightweight, high-strength, and multifunctional, are widely used in clothing, home textiles, and industrial textiles (such as medical protective equipment, outdoor gear, and automotive interiors). However, existing manufacturing processes for composite fiber textiles have key limitations that restrict product functionality and performance.

[0003] Limited functionality and poor compatibility: Traditional processes can only achieve single-function modification (such as only antibacterial, only wear-resistant, or only heat preservation). When multiple functions are combined, functional antagonism is likely to occur (such as antibacterial agents damaging the structure of the heat preservation layer, and wear-resistant coatings reducing moisture absorption and perspiration performance), making it difficult to achieve multi-dimensional functional integration of "antibacterial + wear-resistant + heat preservation + moisture absorption and perspiration".

[0004] Weak interfacial bonding: Different types of fibers (such as polyester fiber, graphene fiber, and bamboo fiber) have large differences in surface polarity. When compounded, they are only physically blended together, and the interface is prone to delamination and peeling. After multiple washes, the functional layer of the finished product falls off, resulting in poor durability (functional retention rate ≤60% after 5 washes).

[0005] The pretreatment process is crude: the fiber pretreatment only uses simple alkali washing or coupling agent soaking, without customized modification schemes for different fiber characteristics, resulting in uneven fiber dispersion during subsequent blending and spinning processes, high spinning breakage rate (≥8%), and large fluctuations in the mechanical properties of the finished product.

[0006] Poor compatibility between spinning and forming processes: Traditional melt spinning or solution spinning process parameters are fixed and cannot be adapted to the gradient structure design of composite fibers. The spun fibers have uniform cross-sections and cannot balance strength and functional release efficiency. Uneven stress distribution during stretching and forming process leads to fiber breaking elongation deviation ≥10%.

[0007] Poor adhesion of finishing functions: Functional additives (such as antibacterial agents and heat-insulating microcapsules) are only physically adsorbed or simply coated onto the fiber surface. They are easily lost after friction and washing, and cannot achieve long-lasting function (antibacterial performance only lasts for 10 washes).

[0008] Existing technologies have not yet formed an integrated preparation process of "customized pretreatment - gradient composite spinning - directional stretching and molding - multi-functional synergistic finishing - setting and curing", making it difficult to balance multi-functional integration, interfacial bonding, mechanical properties and functional durability. Therefore, a preparation process for multi-functional composite fiber textile products is proposed. Summary of the Invention

[0009] In view of this, the present invention provides a process for preparing multifunctional composite fiber textile products to solve or alleviate the technical problems existing in the prior art, and at least provides a beneficial alternative.

[0010] The technical solution of this invention is achieved as follows: the preparation process of multifunctional composite fiber textile products includes the following steps:

[0011] Step 1: Customized pretreatment for multiple fiber types

[0012] S1.1 Raw material screening: Weigh 60-70 parts of polyester fiber, 15-20 parts of graphene-modified viscose fiber, 10-15 parts of bamboo fiber, and 5-10 parts of chitin fiber according to the mass fraction, and remove impurities and comb open them respectively.

[0013] S1.2 Differentiated Modification:

[0014] Polyester fiber: Low-temperature plasma treatment (power 100-150W, treatment time 3-5min, argon atmosphere), followed by immersion in 2%-3% KH550 silane coupling agent solution at room temperature for 1-2 hours, and drying (temperature 80-90℃, time 2-3 hours).

[0015] Graphene-modified viscose fiber: Immersed in a 1%–1.5% titanate coupling agent solution, ultrasonically treated (power 200–300W, time 30–40 min), and dried (temperature 70–80℃, time 1.5–2 h).

[0016] Bamboo fiber + chitosan fiber: Pre-treatment with alkaline washing (NaOH solution mass concentration 3%~5%, temperature 50~60℃, time 1~1.5h), neutralized to neutral, then soaked in chitosan solution mass concentration 0.5%~1% for 2~3h at room temperature, and then dried;

[0017] S1.3 Mixing and Dispersion: Add all the modified fibers to a high-speed mixer at a speed of 800~1000 r / min for 20~30 min, and add 1~2 parts by weight of dispersant (polyethylene glycol 4000) to obtain the pretreated fiber mixture;

[0018] Step 2: Gradient composite blend spinning

[0019] S2.1 Melt Blending: The pretreated fiber mixture is added to a twin-screw extruder, and the temperature is controlled in stages (zone 1 230~240℃, zone 2 245~255℃, zone 3 250~260℃). The screw speed is 300~400r / min. After melt blending, a composite melt is obtained.

[0020] S2.2 Gradient spinning: The composite melt is fed into the gradient spinning assembly. The spinning nozzle adopts a three-layer concentric circle structure (the inner layer is graphene viscose fiber melt, the middle layer is polyester fiber melt, and the outer layer is bamboo fiber + chitin fiber melt). The spinning temperature is 240~250℃, the spinning speed is 1000~1200m / min, the cooling air temperature is 25~30℃, and the air velocity is 0.5~1m / s, to obtain nascent composite fibers.

[0021] Step 3: Directional stretching molding

[0022] S3.1 Preheating and stretching: The nascent composite fibers are fed into the stretching machine. The preheating temperature is 80~90℃, the first-stage stretching ratio is 1.5~1.8 times, and the stretching speed is 50~60m / min.

[0023] S3.2 Heat setting and stretching: Secondary stretching temperature 100~110℃, stretching ratio 1.2~1.4 times, stretching speed 40~50m / min, to obtain oriented stretching composite fibers;

[0024] Step 4: Post-processing of multi-functional collaboration

[0025] S4.1 Preparation of antibacterial and wear-resistant coating: Weigh 5-8 parts of nano zinc oxide antibacterial agent, 20-25 parts of polyurethane wear-resistant resin, and 60-70 parts of deionized water according to the mass ratio. Stir at high speed (speed 1500-2000 r / min) and then ultrasonically disperse (power 400-500 W, time 20-30 min) to obtain antibacterial and wear-resistant coating liquid;

[0026] S4.2 Preparation of heat-insulating and moisture-absorbing finishing solution: Weigh 8-10 parts of aerogel heat-insulating microcapsules, 3-5 parts of polyethylene glycol moisture absorbent, 1-2 parts of crosslinking agent (hexamethylene diisocyanate), and 75-85 parts of deionized water according to the mass ratio, and stir to mix to obtain the heat-insulating and moisture-absorbing finishing solution.

[0027] S4.3 Step-by-step finishing: The oriented composite fibers are first immersed in an antibacterial and abrasion-resistant coating solution (liquor ratio 1:20~1:30, temperature 40~50℃, time 30~40min), with a roll-in rate of 70%~80%, and pre-dried (temperature 80~90℃, time 10~15min); then immersed in a heat-insulating and moisture-absorbing finishing solution (liquor ratio 1:15~1:25, temperature 50~60℃, time 20~30min), with a roll-in rate of 60%~70%, and pre-dried (temperature 70~80℃, time 15~20min).

[0028] Step 5: Crosslinking, shaping, and curing

[0029] S5.1 Thermal crosslinking and setting: The finished fibers are fed into a setting machine at a temperature of 120~130℃ for 20~30 minutes and a pressure of 0.2~0.3MPa to covalently crosslink the functional additives with the fibers;

[0030] S5.2 Cooling and curing: After natural cooling to room temperature, blow with low-temperature cold air (temperature 15~20℃, wind speed 0.3~0.5m / s) for 10~15min to obtain shaped composite fibers;

[0031] Step 6: Textile forming and finished product inspection

[0032] S6.1 Textile forming: The shaped composite fibers are woven into products using woven / knitted / nonwoven processes as required;

[0033] S6.2 Performance Testing: Test the antibacterial rate, wear resistance, thermal conductivity, wicking height, and other indicators of the finished product. Once the standards are met, it is considered a finished product.

[0034] More preferably, in step S1.2, the low-temperature plasma treatment adopts glow discharge mode, the plasma generator frequency is 13.56MHz, and the argon flow rate is 10-15L / min during treatment.

[0035] More preferably, in step S2.2, the extrusion pressures of the inner, middle, and outer melts of the gradient spinning assembly are 0.8~1.0MPa, 1.0~1.2MPa, and 0.6~0.8MPa, respectively, to ensure that the three melts are extruded synchronously and adhered at the interface.

[0036] In a further preferred embodiment, the stretching process in steps S3.1 to S3.2 adopts segmented speed control to avoid stress concentration and breakage caused by fiber stretching.

[0037] In a further preferred embodiment, the stretching process in steps S3.1 to S3.2 adopts segmented speed control to avoid stress concentration and breakage caused by fiber stretching.

[0038] In a further preferred embodiment, the aerogel insulation microcapsules in step S4.2 are silica aerogel-coated structures with a particle size of 1~5μm, which improves the insulation performance by 25%.

[0039] In a further preferred embodiment, the thermal crosslinking and setting in step S5.1 adopts a hot air circulation mode with a temperature uniformity of ±2℃ to ensure that the degree of crosslinking is consistent in all parts of the fiber.

[0040] More preferably, in step S6.1, the warp and weft density of the woven process is 100×80 threads / inch, the loop density of the knitted process is 20~25 loops / cm, and the areal density of the nonwoven process is 100~200g / m².

[0041] Further preferred, the performance standards of the finished product in step S6.2 are: antibacterial rate ≥99% (for Escherichia coli and Staphylococcus aureus), Martindale abrasion resistance ≥50,000 cycles, thermal conductivity ≤0.035W / (m・K), and wicking height ≥10cm / 30min.

[0042] The embodiments of the present invention have the following advantages due to the adoption of the above technical solutions:

[0043] I. This invention achieves multi-dimensional functional integration of "antibacterial (bacteriostatic rate ≥99%) + abrasion resistance (Martindale abrasion resistance ≥50,000 times) + heat preservation (thermal conductivity coefficient ≤0.035W / (m・K)) + moisture absorption and perspiration (wicking height ≥10cm / 30min)", with no antagonism between functions, and a functional retention rate of ≥85% after 50 washes; through plasma modification + coupling agent grafting composite pretreatment, the bonding strength of different fiber interfaces is increased by more than 40%, and the finished product shows no delamination or peeling after 50 washes, with mechanical property stability improved by 35%.

[0044] II. The gradient composite spinning process of this invention is suitable for blending various types of fibers such as polyester, graphene, and bamboo fiber, reducing the spinning breakage rate to ≤1%; the directional stretching molding ensures uniform fiber stress distribution, with a breaking elongation deviation of ≤3%, and the finished product qualification rate is increased to over 98%; the multifunctional finishing process adopts microcapsule encapsulation + cross-linking curing technology, where functional additives are covalently bonded to the fibers, improving longevity by more than 5 times; the entire process uses water-based additives, with no organic solvent volatilization, meeting green and environmental protection requirements.

[0045] Third, this invention can be adapted to the functional requirements of different application scenarios (medical protection, outdoor clothing, industrial textiles), and the functional weight can be customized by adjusting the process parameters (such as enhancing antibacterial properties in medical scenarios and enhancing wear resistance and heat insulation in outdoor scenarios).

[0046] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the invention will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0047] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0048] Figure 1 This is a process flow diagram of the present invention. Detailed Implementation

[0049] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0050] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0051] like Figure 1 As shown, this embodiment of the invention provides a process for preparing multifunctional composite fiber textile products, including the following steps:

[0052] Step 1: Customized pretreatment for multiple fiber types

[0053] S1.1 Raw material screening: Weigh 60-70 parts of polyester fiber, 15-20 parts of graphene-modified viscose fiber, 10-15 parts of bamboo fiber, and 5-10 parts of chitin fiber according to the mass fraction, and remove impurities and comb open them respectively.

[0054] S1.2 Differentiated Modification:

[0055] Polyester fiber: Low-temperature plasma treatment (power 100-150W, treatment time 3-5min, argon atmosphere), followed by immersion in 2%-3% KH550 silane coupling agent solution at room temperature for 1-2 hours, and drying (temperature 80-90℃, time 2-3 hours).

[0056] Graphene-modified viscose fiber: Immersed in a 1%–1.5% titanate coupling agent solution, ultrasonically treated (power 200–300W, time 30–40 min), and dried (temperature 70–80℃, time 1.5–2 h).

[0057] Bamboo fiber + chitosan fiber: Pre-treatment with alkaline washing (NaOH solution mass concentration 3%~5%, temperature 50~60℃, time 1~1.5h), neutralized to neutral, then soaked in chitosan solution mass concentration 0.5%~1% for 2~3h at room temperature, and then dried;

[0058] S1.3 Mixing and Dispersion: Add all the modified fibers to a high-speed mixer at a speed of 800~1000 r / min for 20~30 min, and add 1~2 parts by weight of dispersant (polyethylene glycol 4000) to obtain the pretreated fiber mixture;

[0059] Step 2: Gradient composite blend spinning

[0060] S2.1 Melt Blending: The pretreated fiber mixture is added to a twin-screw extruder, and the temperature is controlled in stages (zone 1 230~240℃, zone 2 245~255℃, zone 3 250~260℃). The screw speed is 300~400r / min. After melt blending, a composite melt is obtained.

[0061] S2.2 Gradient spinning: The composite melt is fed into the gradient spinning assembly. The spinning nozzle adopts a three-layer concentric circle structure (the inner layer is graphene viscose fiber melt, the middle layer is polyester fiber melt, and the outer layer is bamboo fiber + chitin fiber melt). The spinning temperature is 240~250℃, the spinning speed is 1000~1200m / min, the cooling air temperature is 25~30℃, and the air velocity is 0.5~1m / s, to obtain nascent composite fibers.

[0062] Step 3: Directional stretching molding

[0063] S3.1 Preheating and stretching: The nascent composite fibers are fed into the stretching machine. The preheating temperature is 80~90℃, the first-stage stretching ratio is 1.5~1.8 times, and the stretching speed is 50~60m / min.

[0064] S3.2 Heat setting and stretching: Secondary stretching temperature 100~110℃, stretching ratio 1.2~1.4 times, stretching speed 40~50m / min, to obtain oriented stretching composite fibers;

[0065] Step 4: Post-processing of multi-functional collaboration

[0066] S4.1 Preparation of antibacterial and wear-resistant coating: Weigh 5-8 parts of nano zinc oxide antibacterial agent, 20-25 parts of polyurethane wear-resistant resin, and 60-70 parts of deionized water according to the mass ratio. Stir at high speed (speed 1500-2000 r / min) and then ultrasonically disperse (power 400-500 W, time 20-30 min) to obtain antibacterial and wear-resistant coating liquid;

[0067] S4.2 Preparation of heat-insulating and moisture-absorbing finishing solution: Weigh 8-10 parts of aerogel heat-insulating microcapsules, 3-5 parts of polyethylene glycol moisture absorbent, 1-2 parts of crosslinking agent (hexamethylene diisocyanate), and 75-85 parts of deionized water according to the mass ratio, and stir to mix to obtain the heat-insulating and moisture-absorbing finishing solution.

[0068] S4.3 Step-by-step finishing: The oriented composite fibers are first immersed in an antibacterial and abrasion-resistant coating solution (liquor ratio 1:20~1:30, temperature 40~50℃, time 30~40min), with a roll-in rate of 70%~80%, and pre-dried (temperature 80~90℃, time 10~15min); then immersed in a heat-insulating and moisture-absorbing finishing solution (liquor ratio 1:15~1:25, temperature 50~60℃, time 20~30min), with a roll-in rate of 60%~70%, and pre-dried (temperature 70~80℃, time 15~20min).

[0069] Step 5: Crosslinking, shaping, and curing

[0070] S5.1 Thermal crosslinking and setting: The finished fibers are fed into a setting machine at a temperature of 120~130℃ for 20~30 minutes and a pressure of 0.2~0.3MPa to covalently crosslink the functional additives with the fibers;

[0071] S5.2 Cooling and curing: After natural cooling to room temperature, blow with low-temperature cold air (temperature 15~20℃, wind speed 0.3~0.5m / s) for 10~15min to obtain shaped composite fibers;

[0072] Step 6: Textile forming and finished product inspection

[0073] S6.1 Textile forming: The shaped composite fibers are woven into products using woven / knitted / nonwoven processes as required;

[0074] S6.2 Performance Testing: Test the antibacterial rate, wear resistance, thermal conductivity, wicking height, and other indicators of the finished product. Once the standards are met, it is considered a finished product.

[0075] In one embodiment, the low-temperature plasma treatment in step S1.2 adopts a glow discharge mode, the plasma generator frequency is 13.56MHz, and the argon flow rate is 10-15L / min during the treatment.

[0076] In one embodiment, the extrusion pressures of the inner, middle, and outer melts of the gradient spinning assembly in step S2.2 are 0.8~1.0MPa, 1.0~1.2MPa, and 0.6~0.8MPa, respectively, to ensure that the three melts are extruded synchronously and adhered at the interface.

[0077] In one embodiment, the stretching process in steps S3.1 to S3.2 adopts segmented speed control to avoid stress concentration and breakage caused by fiber stretching.

[0078] In one embodiment, the stretching process in steps S3.1 to S3.2 adopts segmented speed control to avoid stress concentration and breakage caused by fiber stretching.

[0079] In one embodiment, the aerogel insulation microcapsules in step S4.2 are silica aerogel-coated structures with a particle size of 1~5μm, which improves the insulation performance by 25%.

[0080] In one embodiment, the thermal crosslinking and setting in step S5.1 adopts a hot air circulation mode with a temperature uniformity of ±2℃ to ensure that the degree of crosslinking is consistent in all parts of the fiber.

[0081] In one embodiment, the warp and weft density of the woven process in step S6.1 is 100×80 threads / inch, the loop density of the knitted process is 20~25 loops / cm, and the areal density of the nonwoven process is 100~200g / m².

[0082] In one embodiment, the performance standards for the finished product in step S6.2 are: antibacterial rate ≥99% (for Escherichia coli and Staphylococcus aureus), Martindale abrasion resistance ≥50,000 cycles, thermal conductivity ≤0.035W / (m・K), and wicking height ≥10cm / 30min.

[0083] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in the present invention, and these should all be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A preparation process for multifunctional composite fiber textile products, characterized in that: Includes the following steps: Step 1: Customized pretreatment for multiple fiber types S1.1 Raw material screening: Weigh 60-70 parts of polyester fiber, 15-20 parts of graphene-modified viscose fiber, 10-15 parts of bamboo fiber, and 5-10 parts of chitin fiber according to the mass fraction, and remove impurities and comb open them respectively. S1.2 Differentiated Modification: Polyester fiber: Low-temperature plasma treatment (power 100-150W, treatment time 3-5min, argon atmosphere), followed by immersion in 2%-3% KH550 silane coupling agent solution at room temperature for 1-2 hours, and drying (temperature 80-90℃, time 2-3 hours). Graphene-modified viscose fiber: Immersed in a 1%–1.5% titanate coupling agent solution, ultrasonically treated (power 200–300W, time 30–40 min), and dried (temperature 70–80℃, time 1.5–2 h). Bamboo fiber + chitosan fiber: Pre-treatment with alkaline washing (NaOH solution mass concentration 3%~5%, temperature 50~60℃, time 1~1.5h), neutralized to neutral, then soaked in chitosan solution mass concentration 0.5%~1% for 2~3h at room temperature, and then dried; S1.3 Mixing and Dispersion: Add all the modified fibers to a high-speed mixer at a speed of 800~1000 r / min for 20~30 min, and add 1~2 parts by weight of dispersant (polyethylene glycol 4000) to obtain the pretreated fiber mixture; Step 2: Gradient composite blend spinning S2.1 Melt Blending: The pretreated fiber mixture is added to a twin-screw extruder, and the temperature is controlled in stages (zone 1 230~240℃, zone 2 245~255℃, zone 3 250~260℃). The screw speed is 300~400r / min. After melt blending, a composite melt is obtained. S2.2 Gradient spinning: The composite melt is fed into the gradient spinning assembly. The spinning nozzle adopts a three-layer concentric circle structure (the inner layer is graphene viscose fiber melt, the middle layer is polyester fiber melt, and the outer layer is bamboo fiber + chitin fiber melt). The spinning temperature is 240~250℃, the spinning speed is 1000~1200m / min, the cooling air temperature is 25~30℃, and the air velocity is 0.5~1m / s, to obtain nascent composite fibers. Step 3: Directional stretching molding S3.1 Preheating and stretching: The nascent composite fibers are fed into the stretching machine. The preheating temperature is 80~90℃, the first-stage stretching ratio is 1.5~1.8 times, and the stretching speed is 50~60m / min. S3.2 Heat setting and stretching: Secondary stretching temperature 100~110℃, stretching ratio 1.2~1.4 times, stretching speed 40~50m / min, to obtain oriented stretching composite fibers; Step 4: Post-processing of multi-functional collaboration S4.1 Preparation of antibacterial and wear-resistant coating: Weigh 5-8 parts of nano zinc oxide antibacterial agent, 20-25 parts of polyurethane wear-resistant resin, and 60-70 parts of deionized water according to the mass ratio. Stir at high speed (speed 1500-2000 r / min) and then ultrasonically disperse (power 400-500 W, time 20-30 min) to obtain antibacterial and wear-resistant coating liquid; S4.2 Preparation of heat-insulating and moisture-absorbing finishing solution: Weigh 8-10 parts of aerogel heat-insulating microcapsules, 3-5 parts of polyethylene glycol moisture absorbent, 1-2 parts of crosslinking agent (hexamethylene diisocyanate), and 75-85 parts of deionized water according to the mass ratio, and stir to mix to obtain the heat-insulating and moisture-absorbing finishing solution. S4.3 Step-by-step finishing: The oriented composite fibers are first immersed in an antibacterial and abrasion-resistant coating solution (liquor ratio 1:20~1:30, temperature 40~50℃, time 30~40min), with a roll-in rate of 70%~80%, and pre-dried (temperature 80~90℃, time 10~15min); then immersed in a heat-insulating and moisture-absorbing finishing solution (liquor ratio 1:15~1:25, temperature 50~60℃, time 20~30min), with a roll-in rate of 60%~70%, and pre-dried (temperature 70~80℃, time 15~20min). Step 5: Crosslinking, shaping, and curing S5.1 Thermal crosslinking and setting: The finished fibers are fed into a setting machine at a temperature of 120~130℃ for 20~30 minutes and a pressure of 0.2~0.3MPa to covalently crosslink the functional additives with the fibers; S5.2 Cooling and curing: After natural cooling to room temperature, blow with low-temperature cold air (temperature 15~20℃, wind speed 0.3~0.5m / s) for 10~15min to obtain shaped composite fibers; Step 6: Textile forming and finished product inspection S6.1 Textile forming: The shaped composite fibers are woven into products using woven / knitted / nonwoven processes as required; S6.2 Performance Testing: Test the antibacterial rate, wear resistance, thermal conductivity, wicking height, and other indicators of the finished product. Once the standards are met, it is considered a finished product.

2. The preparation process of the multifunctional composite fiber textile product according to claim 1, characterized in that: In step S1.2, the low-temperature plasma treatment adopts the glow discharge mode, the plasma generator frequency is 13.56MHz, and the argon flow rate is 10-15L / min.

3. The preparation process of the multifunctional composite fiber textile product according to claim 1, characterized in that: In step S2.2, the extrusion pressures of the inner, middle, and outer melts of the gradient spinning assembly are 0.8~1.0MPa, 1.0~1.2MPa, and 0.6~0.8MPa, respectively, to ensure that the three melts are extruded synchronously and adhered at the interface.

4. The preparation process of the multifunctional composite fiber textile product according to claim 1, characterized in that: In steps S3.1 to S3.2, the stretching process is carried out in segments with speed control to avoid stress concentration and breakage caused by fiber stretching.

5. The preparation process of the multifunctional composite fiber textile product according to claim 1, characterized in that: In steps S3.1 to S3.2, the stretching process is carried out in segments with speed control to avoid stress concentration and breakage caused by fiber stretching.

6. The preparation process of the multifunctional composite fiber textile product according to claim 1, characterized in that: In step S4.2, the aerogel insulation microcapsules have a silica aerogel coating structure with a particle size of 1~5μm, which improves the insulation performance by 25%.

7. The preparation process of the multifunctional composite fiber textile product according to claim 1, characterized in that: In step S5.1, the thermal cross-linking and setting adopts a hot air circulation mode with a temperature uniformity of ±2℃ to ensure that the degree of cross-linking is consistent in all parts of the fiber.

8. The preparation process of the multifunctional composite fiber textile product according to claim 1, characterized in that: In step S6.1, the warp and weft density of the woven process is 100×80 threads / inch, the loop density of the knitted process is 20~25 loops / cm, and the areal density of the nonwoven process is 100~200g / m².

9. The preparation process of the multifunctional composite fiber textile product according to claim 1, characterized in that: The performance standards for the finished product in step S6.2 are as follows: antibacterial rate ≥99% (for Escherichia coli and Staphylococcus aureus), Martindale abrasion resistance ≥50,000 cycles, thermal conductivity ≤0.035W / (m・K), and wicking height ≥10cm / 30min.

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