Lightweight and breathable ski functional fabric and its preparation process

Abstract

This invention relates to a lightweight, breathable ski fabric and its preparation process. The preparation process includes the following steps: impregnating washed, degreased, and dewaxed wool yarn with a finishing agent, drying it to obtain finished wool yarn, and then weaving it to obtain a base fabric; dissolving TPU particles in a mixed solvent to prepare a spinning solution, and then electrospinning it to obtain a TPU nanofiber membrane; using the finished wool yarn as the core and nylon 66FDY yarn as the outer layer, preparing wool core-spun yarn using a core-spun yarn process, and then weaving it as the warp and weft yarns to obtain an outer fabric; and finally, combining the outer fabric, the TPU nanofiber membrane, and the base fabric to obtain the lightweight, breathable ski fabric. The lightweight, breathable ski fabric of this invention has excellent breathability, moisture permeability, UV protection, and shrinkage resistance. Furthermore, the microporous network formed by the interwoven ultrafine fibers of the TPU nanofiber membrane effectively blocks the intrusion of snow particles, making it suitable for manufacturing ski suits and other outdoor clothing.

Description

Technical Field

[0001] This invention belongs to the field of fabric technology, specifically relating to a lightweight, breathable ski fabric and its preparation process. Background Technology

[0002] As a typical winter extreme sport, skiing places extremely stringent functional requirements on clothing fabrics. Skiing is usually carried out in extreme environments with low temperatures, strong winds, high humidity, or snow and fog. During high-intensity exercise, athletes produce a lot of sweat. If the ski suit fabric is not breathable enough, the sweat cannot be released in time and will easily condense inside the clothing, resulting in a feeling of dampness and cold. Conversely, if the fabric is not windproof enough, cold air from the outside can easily penetrate, accelerating convection and heat loss, which may cause a drop in core body temperature, affecting athletic performance and even safety. Therefore, fabrics that combine lightweight, breathable, windproof, and moisture-wicking properties have become the core requirements for high-performance ski suits.

[0003] Wool fibers, due to their natural warmth, moisture absorption, and comfort, have been gradually introduced into outdoor functional fabrics. However, ordinary wool fabrics have problems such as easy shrinkage and poor UV resistance. Furthermore, when untreated wool yarns are combined with synthetic fibers, the interfacial bonding is weak, affecting the dimensional stability and durability of the fabric. Existing anti-shrinkage finishing agents mostly use chlorine-containing chemicals, which can improve shrinkage resistance but are not environmentally friendly and have limited functionality, making it difficult to meet diverse needs such as UV protection and enhanced composite strength.

[0004] Therefore, developing a lightweight, breathable, windproof, moisture-wicking, shrink-resistant, and UV-resistant ski fabric, and exploring its green and efficient preparation process, has significant practical application value. Summary of the Invention

[0005] The purpose of this invention is to provide a lightweight and breathable ski fabric and its preparation process in order to solve the above-mentioned problems.

[0006] The present invention achieves the above objectives through the following technical solutions: A manufacturing process for a lightweight, breathable ski fabric specifically includes the following steps: Step 1: Impregnate the washed, degreased, and dewaxed wool yarn with a finishing agent, and dry it to obtain finished wool yarn. Use the finished wool yarn to weave the base fabric. The raw materials for preparing the finishing agent, by weight, include 12-20 parts of waterborne polyurethane emulsion, 5-15 parts of silver chrysanthemum extract emulsion, 1-3 parts of sodium lignosulfonate, 0.5-3 parts of vinyltriethoxysilane, 0.5-2 parts of fatty alcohol polyoxyethylene ether, 1-3 parts of organosilicon emulsion, 1-5 parts of isopropanol, and 60-70 parts of deionized water. Step 2: Dissolve TPU particles in a mixed solvent to prepare a spinning solution, and obtain a TPU nanofiber membrane by electrospinning; Step 3: Using the finished wool yarn as the core and nylon 66FDY yarn as the outer layer, wool core-spun yarn is prepared by core-spun yarn process. The wool core-spun yarn is then used as the warp and weft yarns to weave the fabric. Step 4: Stack the face fabric, TPU nanofiber membrane, and base fabric from top to bottom, place hot melt adhesive between adjacent layers of fabric, and obtain a lightweight and breathable skiing functional fabric after hot pressing and cooling shaping treatment.

[0007] As a further optimization of the present invention, in step one, the impregnation treatment is to dilute with deionized water to obtain a 3-8 wt% aqueous solution of finishing agent, adjust the pH to 6-7, immerse the wool yarn at a temperature of 45-55°C for 45-75 min, and dry it to obtain the finished wool yarn. The base fabric has a weight of 60-100 GSM.

[0008] As a further optimization of the present invention, the finishing agent is obtained by stirring and hydrolyzing vinyltriethoxysilane, isopropanol, and a portion of deionized water at room temperature to obtain hydrolyzed vinyltriethoxysilane; premixing aqueous polyurethane emulsion, the remainder of deionized water, and silver chrysanthemum extract emulsion; then sequentially adding sodium lignosulfonate, hydrolyzed vinyltriethoxysilane, fatty alcohol polyoxyethylene ether, and organosilicon emulsion, and stirring to obtain the finishing agent.

[0009] As a further optimization of the present invention, the method for obtaining the silver chrysanthemum extract emulsion is as follows: the phloem of the stem of silver chrysanthemum is crushed and wet-ground to obtain a mixture; aluminum sulfate and fatty alcohol polyoxyethylene ether are added to the mixture, stirred evenly, and reacted for 20-35 minutes; the mixture is washed with deionized water and centrifuged to obtain a middle layer emulsion; and the emulsion is obtained after filtration, adsorption with macroporous resin, and pH adjustment.

[0010] As a further optimization of the present invention, the macroporous resin is at least one of D101, AB-8, and HPD100 type macroporous adsorption resins.

[0011] As a further optimization of the present invention, in step two, the mixed solvent is prepared by dimethylformamide and acetone in a volume ratio of 6-8:2-4, and the mass fraction of TPU particles in the spinning solution is 12-18%. The pore size of the TPU nanofiber membrane is 0.2-0.8 μm.

[0012] As a further optimization of the present invention, the pore size of the TPU nanofiber membrane is 0.2-0.8 μm.

[0013] As a further optimization of the present invention, in step three, the mass ratio of the finished wool yarn and nylon 66FDY yarn in the wool core-spun yarn is 2.5-4:1; The fineness of the nylon 66FDY yarn is 7-15D, and the wool yarn is 80-120 count ultrafine merino wool yarn.

[0014] As a further optimization of the present invention, in step three, the fabric is woven in a plain weave, the warp density is 70-110 threads / cm, and the weft density is 60-80 threads / cm.

[0015] A lightweight and breathable ski fabric is prepared using the above-mentioned manufacturing process.

[0016] The beneficial effects of this invention are as follows: 1) This invention uses a TPU nanofiber membrane as an intermediate functional layer, combined with a three-layer hot-pressed composite structure of face fabric, membrane, and base fabric, so that the overall weight of the fabric is low, while still giving the fabric excellent breathability, moisture permeability, UV protection and shrinkage resistance. In addition, the microporous network formed by the interwoven ultra-fine fibers of the TPU nanofiber membrane can effectively block the intrusion of wind and snow particles, achieving a triple balance of lightweight, breathability and windproof, which can be used to make outdoor clothing such as ski suits; 2) This invention uses a compound of silver chrysanthemum extract emulsion and water-based polyurethane emulsion as the core component of the finishing agent to construct a uniform functional film layer on the surface of wool fibers. The UV protection and shrinkage prevention functions are significantly better than those of commercially available shrinkage prevention finishing agents, achieving a highly efficient integration of UV protection and shrinkage prevention functions. 3) The wool yarn processed in this invention has wool yarn as the core and nylon 66FDY yarn as the outer layer. The wool core-spun yarn is prepared by the core-spun yarn process, which gives the fabric a stable dimensional shape and significantly improves the service life of ski suits. Detailed Implementation

[0017] The present application will now be described in further detail. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0018] I. Materials 1. Superfine Merino wool yarn: 80-120 count superfine Merino wool yarn, 100 count superfine Merino wool yarn was used in the following experiment; 2. Nylon 66FDY yarn: fineness 7-15D; 3. Commercially available anti-shrinkage finishing agent: Goon815 wool anti-felting agent, purchased from Dongguan Jia Hong Organosilicon Technology Co., Ltd.; 4. Waterborne polyurethane emulsion: purchased from Junqiao New Materials (Shenzhen) Co., Ltd., with a solid content of 35%; 5. Phloem of Parthenium hysterophorus stem: Parthenium hysterophorus L. is an annual herbaceous plant of the genus Parthenium in the family Asteraceae. In the following experiments, the phloem of the stem containing the lacrimal system of Parthenium hysterophorus was used; the raw material used in Comparative Example 9 below was the phloem of the stem of Roman chamomile (Anthemis nobilis). 6. Chromatography column of macroporous adsorption resin: The resin is at least one of D101, AB-8, and HPD100. D101 macroporous adsorption resin is used in the following experiments. Unless otherwise specified, all methods used in the following examples can be performed using conventional methods. Other materials and reagents used can be obtained commercially unless otherwise specified.

[0019] II. Methods Example 1

[0020] This embodiment provides a manufacturing process for a lightweight and breathable ski fabric, including the following steps: Step 1: The wool yarn after washing, degreasing, and dewaxing is impregnated with a finishing agent. Specifically, a 5.5 wt% finishing agent aqueous solution is obtained by diluting with deionized water, adjusting the pH to 6.5, and then immersing the superfine merino wool yarn at 48°C for 55 minutes. After drying, the finished wool yarn is obtained. The finished wool yarn is then used to weave a base fabric with a weight of 60-100 GSM (87 GSM in this application). The raw materials for preparing the finishing agent, by weight, include 12 parts of waterborne polyurethane emulsion, 15 parts of silver chrysanthemum extract emulsion, 1 part of sodium lignosulfonate, 2 parts of vinyltriethoxysilane, 1 part of fatty alcohol polyoxyethylene ether, 1.5 parts of organosilicon emulsion, 2.5 parts of isopropanol, and 65 parts of deionized water.

[0021] The specific method for obtaining this finishing agent is as follows: 1-1. Crush the phloem of *Chrysanthemum indicum* stems to a particle size ≤3.8cm, then wet grind (using deionized water) to obtain a mixture; add aluminum sulfate (0.5-1% of the dry *Chrysanthemum indicum* material) and fatty alcohol polyoxyethylene ether (0.2-0.5% of the dry *Chrysanthemum indicum* material) to the mixture, stir evenly, and react for 25 minutes; wash with deionized water, centrifuge 3 times, discarding the supernatant and bottom residue each time, and collect the middle emulsion. Filter the obtained middle emulsion through a 200-mesh sieve, adjust the pH of the emulsion to 8-9 using dilute ammonia water, and obtain the *Chrysanthemum indicum* extract emulsion (solid content 30%). 1-2. Add isopropanol and an equal volume of deionized water to vinyltriethoxysilane and stir at room temperature for 4 hours to obtain hydrolyzed vinyltriethoxysilane; premix aqueous polyurethane emulsion, deionized water, and silverwort extract emulsion and stir at 350 rpm for 20 min; add sodium lignosulfonate, hydrolyzed vinyltriethoxysilane, fatty alcohol polyoxyethylene ether, and organosilicon emulsion in sequence, stirring at 240 rpm for 8 min after each addition to obtain finishing agent; Step 2: Dissolve TPU particles in a mixed solvent of dimethylformamide (DMF) and acetone (volume ratio 7:3) to prepare a spinning solution with a mass fraction of 15%. Obtain a TPU nanofiber membrane by electrospinning. The spinning parameters are: voltage 18kV, receiving distance 18cm, liquid supply rate 1.0mL / h, ambient temperature 23℃, relative humidity 50%, and receiving roller speed 100r / min. Spin until the membrane thickness is approximately 30μm to obtain a TPU nanofiber membrane with a pore size of 0.5μm. Step 3: Using the finished wool yarn obtained in Step 1 as the core and nylon 66FDY yarn as the outer layer (mass ratio of the two is 3.2:1), wool core-spun yarn is prepared through a core-spun yarn process. Specifically, using a ring spinning machine, the nylon 66FDY yarn is fed in through the bell mouth and drafted by the drafting mechanism with a drafting ratio of 24±1.5; the finished wool yarn is fed in through the front roller nip and output at the center position of the nylon 66FDY yarn. After merging with the drafted finished wool yarn, they enter the twisting triangle area for twisting with a twist of 870 / m±30 / m. Step 4: Use wool core-spun yarn as warp and weft to weave the fabric. The weave structure is plain weave, with a warp density of 70-110 threads / cm and a weft density of 60-80 threads / cm. Step 5: Stack the face fabric, TPU nanofiber membrane, and base fabric from top to bottom, place a dotted hot melt adhesive mesh between adjacent layers of fabric with a coverage of 20%, and obtain a lightweight breathable skiing functional fabric after hot pressing and cooling shaping treatment (the weight of the lightweight breathable skiing functional fabric in the embodiments and comparative examples of this application is 235±10GSM).

[0022] Example 2

[0023] In this embodiment, a preparation process for a lightweight and breathable ski functional fabric is provided. Based on Example 1, the method for obtaining the finishing agent is adjusted. The modified method for obtaining the finishing agent is as follows: 1-1. Crush the phloem of *Chrysanthemum indicum* stems to a particle size ≤3.8 cm, then wet grind (using deionized water) to obtain a mixture. Add aluminum sulfate (0.5-1% of the dry *Chrysanthemum indicum* material) and fatty alcohol polyoxyethylene ether (0.2-0.5% of the dry *Chrysanthemum indicum* material) to the mixture, stir evenly, and react for 25 min. Wash with deionized water and centrifuge three times, discarding the supernatant and bottom residue each time, and collect the middle emulsion. Filter the obtained middle emulsion through a 200-mesh sieve. Pass the filtrate through a chromatography column packed with macroporous adsorption resin at a flow rate of 3 BV / h, collect the eluent, and then wash the macroporous adsorption resin chromatography column with deionized water at a flow rate of 2 BV / h. Combine the eluent and washing liquid, centrifuge, discard the supernatant, and collect the emulsion. Adjust the pH of the emulsion to 8-9 using dilute ammonia water to obtain *Chrysanthemum indicum* extract emulsion (solid content 30%). 1-2. Add isopropanol and an equal volume of deionized water to vinyltriethoxysilane and stir at room temperature for 4 hours to obtain hydrolyzed vinyltriethoxysilane; premix aqueous polyurethane emulsion, deionized water, and silverwort extract emulsion and stir at 350 rpm for 20 min; add sodium lignosulfonate, hydrolyzed vinyltriethoxysilane, fatty alcohol polyoxyethylene ether, and organosilicon emulsion in sequence, stirring at 240 rpm for 8 min after each addition to obtain finishing agent; Everything else is consistent with Example 1.

[0024] Example 3

[0025] In this embodiment, a preparation process for a lightweight and breathable ski functional fabric is provided. Based on Example 2, the raw materials for preparing the finishing agent are adjusted. The adjusted raw materials for preparing the finishing agent, by weight, include 16 parts of waterborne polyurethane emulsion, 10 parts of silver chrysanthemum extract emulsion, 2 parts of sodium lignosulfonate, 1.5 parts of vinyltriethoxysilane, 0.8 parts of fatty alcohol polyoxyethylene ether, 1.2 parts of organosilicon emulsion, 3 parts of isopropanol, and 65.5 parts of deionized water. Everything else is consistent with Example 2.

[0026] Example 4

[0027] In this embodiment, a preparation process for a lightweight and breathable ski functional fabric is provided. Based on Example 2, the raw materials for preparing the finishing agent are adjusted. The adjusted raw materials for preparing the finishing agent, by weight, include 20 parts of waterborne polyurethane emulsion, 5 parts of silver chrysanthemum extract emulsion, 2 parts of sodium lignosulfonate, 1 part of vinyltriethoxysilane, 0.6 parts of fatty alcohol polyoxyethylene ether, 1 part of organosilicon emulsion, 4 parts of isopropanol, and 66.4 parts of deionized water. Everything else is consistent with Example 2.

[0028] Comparative Example 1 In this comparative example, a preparation process for a lightweight and breathable ski functional fabric is provided. Step one has been adjusted as follows: A commercially available anti-shrinkage finishing agent is used to impregnate the washed, degreased, and dewaxed wool yarn. Specifically, a 5.5 wt% finishing agent aqueous solution is obtained by diluting with deionized water, adjusting the pH to 6.5, and then immersing the superfine merino wool yarn at 48°C for 55 minutes. After drying, the finished wool yarn is obtained. The finished wool yarn is then used to weave a base fabric with a basis weight of 60-100 GSM (87 GSM in this application). Everything else is consistent with Example 3.

[0029] Comparative Example 2 In this comparative example, a preparation process for a lightweight and breathable ski functional fabric is provided. Based on Example 3, the raw materials for preparing the finishing agent are adjusted. The adjusted raw materials for preparing the finishing agent, by weight, include 26 parts of waterborne polyurethane emulsion, 2 parts of sodium lignosulfonate, 1 part of vinyltriethoxysilane, 0.6 parts of fatty alcohol polyoxyethylene ether, 1 part of silicone emulsion, 4 parts of isopropanol, and 65.4 parts of deionized water. Everything else is consistent with Example 3.

[0030] Comparative Example 3 In this comparative example, a preparation process for a lightweight and breathable ski functional fabric is provided. Based on Example 3, the raw materials for preparing the finishing agent are adjusted. The adjusted raw materials for preparing the finishing agent, by weight, include 26 parts of silver guarana extract emulsion, 2 parts of sodium lignosulfonate, 1 part of vinyltriethoxysilane, 0.6 parts of fatty alcohol polyoxyethylene ether, 1 part of silicone emulsion, 4 parts of isopropanol, and 65.4 parts of deionized water. Everything else is consistent with Example 3.

[0031] Comparative Example 4 In this comparative example, a preparation process for a lightweight and breathable ski functional fabric is provided. Based on Example 3, the raw materials for preparing the finishing agent are adjusted. The adjusted raw materials for preparing the finishing agent, by weight, include 16 parts of aqueous epoxy resin emulsion, 10 parts of silver chrysanthemum extract emulsion, 2 parts of sodium lignosulfonate, 1 part of vinyltriethoxysilane, 0.6 parts of fatty alcohol polyoxyethylene ether, 1 part of organosilicon emulsion, 4 parts of isopropanol, and 65.4 parts of deionized water. Everything else is consistent with Example 3.

[0032] Comparative Example 5 This comparative example provides a manufacturing process for a lightweight, breathable ski fabric, including the following steps: Step 1: Using the wool yarn that has been washed, degreased and dewaxed, weave the wool yarn to obtain the base fabric with a weight of 60-100 GSM (87 GSM in this application). Step 2: Dissolve TPU particles in a mixed solvent of dimethylformamide (DMF) and acetone (volume ratio 7:3) to prepare a spinning solution with a mass fraction of 15%. Obtain a TPU nanofiber membrane by electrospinning. The spinning parameters are: voltage 18kV, receiving distance 18cm, liquid supply rate 1.0mL / h, ambient temperature 23℃, relative humidity 50%, and receiving roller speed 100r / min. Spin until the membrane thickness is approximately 30μm to obtain a TPU nanofiber membrane with a pore size of 0.5μm. Step 3: Using the ultrafine merino wool yarn obtained in Step 1 as the core and nylon 66FDY yarn as the outer layer (mass ratio of the two is 3.2:1), wool core-spun yarn is prepared through a core-spun yarn process. Specifically, using a ring spinning machine, the nylon 66FDY yarn is fed in through the bell mouth and drafted by the drafting mechanism with a drafting ratio of 24±1.5. The finished wool yarn is fed in through the front roller nip and output at the center position of the nylon 66FDY yarn. After merging with the drafted finished wool yarn, they enter the twisting triangle area for twisting with a twist of 870 / m±30 / m. Step 4: Use wool core-spun yarn as warp and weft to weave the fabric. The weave structure is plain weave, with a warp density of 70-110 threads / cm and a weft density of 60-80 threads / cm. Step 5: Stack the face fabric, TPU nanofiber membrane, and base fabric from top to bottom, place a dotted hot melt adhesive mesh between adjacent layers of fabric with a coverage of 20%, and obtain a lightweight and breathable skiing functional fabric after hot pressing and cooling shaping treatment.

[0033] Comparative Example 6 In this comparative example, a preparation process for a lightweight and breathable ski functional fabric is provided. Based on Example 3, step three is adjusted as follows: the finished wool yarn and nylon 66FDY yarn are blended at a mass ratio of 3.2:1 to obtain the yarn.

[0034] Everything else is consistent with Example 3.

[0035] Comparative Example 7 This comparative example provides a manufacturing process for a lightweight, breathable ski fabric, including the following steps: Step 1: The wool yarn after washing, degreasing, and dewaxing is impregnated with a finishing agent. Specifically, a 5.5 wt% finishing agent aqueous solution is obtained by diluting with deionized water, adjusting the pH to 6.5, and then immersing the superfine merino wool yarn at 48°C for 55 minutes. After drying, the finished wool yarn is obtained. The finished wool yarn is then used to weave a base fabric with a weight of 60-100 GSM (87 GSM in this application). The raw materials and methods for obtaining the finishing agent are consistent with those in Example 3; Step 2: Using the finished wool yarn obtained in Step 1 as the core and nylon 66FDY yarn as the outer layer (mass ratio of the two is 3.2:1), wool core-spun yarn is prepared through a core-spun yarn process. Specifically, using a ring spinning machine, the nylon 66FDY yarn is fed in through the bell mouth and drafted by the drafting mechanism with a drafting ratio of 24±1.5. The finished wool yarn is fed in through the front roller nip and output at the center position of the nylon 66FDY yarn. After merging with the drafted finished wool yarn, they enter the twisting triangle area for twisting with a twist of 870 / m±30 / m. Step 3: Use wool core-spun yarn as warp and weft to weave the fabric. The weave structure is plain weave, with a warp density of 70-110 threads / cm and a weft density of 60-80 threads / cm. Step 4: Stack the face fabric and back fabric from top to bottom, place a dotted hot melt adhesive mesh between adjacent layers of fabric with a coverage of 20%, and obtain the skiing functional fabric after hot pressing and cooling shaping treatment.

[0036] Comparative Example 8 In this comparative example, a preparation process for a lightweight and breathable ski functional fabric is provided, based on Example 3, except that the raw material, ultrafine merino wool yarn, is replaced with cotton yarn. Everything else is consistent with Example 3.

[0037] Comparative Example 9 This comparative example provides a preparation process for a lightweight and breathable ski functional fabric. Based on Example 3, the raw materials for preparing the finishing agent were adjusted. The adjusted raw materials for preparing the finishing agent, by weight, include 16 parts of aqueous polyurethane emulsion, 10 parts of Roman chamomile extract emulsion (extraction method is the same as in Example 3), 2 parts of sodium lignosulfonate, 1.5 parts of vinyltriethoxysilane, 0.8 parts of fatty alcohol polyoxyethylene ether, 1.2 parts of silicone emulsion, 3 parts of isopropanol, and 65.5 parts of deionized water. Everything else is consistent with Example 3.

[0038] III. Performance Testing 3.1 Air permeability and moisture permeability test Air permeability test: According to GB / T5433 standard, and using a YG461G fully automatic fabric air permeability meter, the air permeability of fabric samples from Examples 1-4 and Comparative Examples 1-9 was tested. Specific experimental parameters were: ambient temperature 23±2℃, relative humidity 60±2%, pressure difference 110Pa, and air permeability area 30cm². 2 The nozzle diameter is 1mm. The fabric sample was tested 10 times at different locations, and the average value was taken as the final air permeability data. Moisture permeability test: According to the national standard GB / T12704.1-2009(a), and using an FX3180 moisture permeability measuring instrument, the moisture permeability of the fabric samples in Examples 1-4 and Comparative Examples 1-9 was tested. The specific experimental parameters were: ambient temperature 25℃±2℃, humidity 80±2% (the test chamber was pre-conditioned before testing), airflow velocity 0.8m / s, and test area 30cm². 2 The moisture permeability data was automatically recorded every 60 minutes for a total of 3 times. After the experiment, the moisture permeability data of the samples were manually recorded, and the average value was used as the final data. The specific test data are shown in Table 1. Table 1. Test data on the breathability and moisture permeability of the fabric

[0039] Experimental conclusions: Based on the data in Table 1, it can be seen that the fabric samples of Examples 1-4 of this invention all have good air permeability and moisture permeability. Among them, the fabric sample of Example 3 has the best air permeability and moisture permeability. This shows that the combination of silver chrysanthemum extract emulsion treated with macroporous adsorption resin and water-based polyurethane emulsion has a synergistic effect, which can form a uniform functional film layer with a suitable microporous structure on the surface of wool fibers, so that the fabric still has good air permeability and moisture permeability.

[0040] 3.2 Sunscreen performance test Fabric samples from Examples 1-4 and Comparative Examples 1-9 were taken. According to the standard GB / T 18830-2009 "Evaluation of Ultraviolet Protection Performance of Textiles", 10 points were taken at different locations on each fabric sample to test its transmittance (TUVA) of ultraviolet light with a wavelength of 200-400 nm. This transmittance was used as the evaluation standard for UV protection performance. Only when the UV transmittance (UVA transmittance) is less than 5% can it be called a "UV-protective product". The experimental data obtained are recorded in Table 2. Table 2. Test data on the sun protection performance of the fabric

[0041] Experimental Conclusions: Based on the data in Table 2, it can be seen that the UVA transmittance of the fabric samples in Examples 1-4 of this invention is less than 5%, which meets the requirements of "UV protection products" in the standard GB / T 18830-2009 Evaluation of UV Protection Performance of Textiles. Among them, Example 3 has the best sun protection performance. Comparative analysis shows that when the sage extract emulsion and water-based polyurethane work synergistically, the UV protection performance of the fabric can be effectively improved. The comparison fully demonstrates the key role of the sage extract emulsion and water-based polyurethane in the sun protection function of ultrafine merino wool yarn.

[0042] 3.3 Shrinkage performance test Shrinkage resistance test: The fabric samples from Examples 1-4 and Comparative Examples 1-9 were folded in half and sewn together with polyester thread. A cross mark was made at each end, and the dimension L0 before shrinkage was recorded. The samples were placed in a washing machine for 6 hours at a speed of 1200 r / min and a temperature of 24℃, and dried at 48℃. The longitudinal and transverse dimensions L1 were recorded. The shrinkage rate of the samples was calculated based on L0 and L1 using the formula: [(L0-L1) / L0]×100%. The test results are shown in Table 3. Table 3. Fabric Shrinkage Performance Test Data Recording Table

[0043] Experimental conclusions: Based on the data in Table 3, it can be seen that the shrinkage rate of the fabric samples in Examples 1-4 of this invention is significantly lower than that of the comparative example. Among them, the shrinkage rate of Example 3 is only 1.21%, with the best anti-shrinkage effect. Analysis revealed that there is a significant synergistic effect between the silver chrysanthemum extract emulsion and the water-based polyurethane emulsion. After the two are combined, they can form a denser, more uniform, and firmly bonded functional film layer on the surface of wool fibers, effectively covering the scale structure and eliminating the directional friction effect. In addition, the core-spun yarn structure can better constrain the dimensional changes of wool yarn and give the fabric a stable shape.

[0044] In summary, this invention achieves a highly efficient integration of shrinkage resistance, UV protection, breathability, moisture permeability, and windproof performance through the synergistic compounding of silver chrysanthemum extract emulsion and water-based polyurethane emulsion, combined with a three-layer composite structure of core-spun yarn technology and TPU nanofiber membrane, providing an effective technical solution for the development of lightweight ski functional fabrics.

[0045] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. A manufacturing process for a lightweight, breathable ski fabric, characterized in that: Specifically, the following steps are included: Step 1: Impregnate the washed, degreased, and dewaxed wool yarn with a finishing agent, and dry it to obtain finished wool yarn. Use the finished wool yarn to weave the base fabric. The raw materials for preparing the finishing agent, by weight, include 12-20 parts of waterborne polyurethane emulsion, 5-15 parts of silver chrysanthemum extract emulsion, 1-3 parts of sodium lignosulfonate, 0.5-3 parts of vinyltriethoxysilane, 0.5-2 parts of fatty alcohol polyoxyethylene ether, 1-3 parts of organosilicon emulsion, 1-5 parts of isopropanol, and 60-70 parts of deionized water. Step 2: Dissolve TPU particles in a mixed solvent to prepare a spinning solution, and obtain a TPU nanofiber membrane by electrospinning; Step 3: Using the finished wool yarn as the core and nylon 66FDY yarn as the outer layer, wool core-spun yarn is prepared by core-spun yarn process. The wool core-spun yarn is then used as the warp and weft yarns to weave the fabric. Step 4: Stack the face fabric, TPU nanofiber membrane, and base fabric from top to bottom, place hot melt adhesive between adjacent layers of fabric, and obtain a lightweight and breathable skiing functional fabric after hot pressing and cooling shaping treatment.

2. The manufacturing process of a lightweight, breathable ski fabric according to claim 1, characterized in that: In step one, the impregnation treatment is to dilute with deionized water to obtain a 3-8 wt% aqueous solution of finishing agent, adjust the pH to 6-7, immerse the wool yarn at a temperature of 45-55℃ for 45-75 minutes, and then dry to obtain the finished wool yarn. The base fabric has a weight of 60-100 GSM.

3. The manufacturing process of a lightweight, breathable ski fabric according to claim 1, characterized in that: The finishing agent is obtained by stirring and hydrolyzing vinyltriethoxysilane, isopropanol, and a portion of deionized water at room temperature to obtain hydrolyzed vinyltriethoxysilane; premixing aqueous polyurethane emulsion, the remainder of deionized water, and silver chrysanthemum extract emulsion; then sequentially adding sodium lignosulfonate, hydrolyzed vinyltriethoxysilane, fatty alcohol polyoxyethylene ether, and organosilicon emulsion, and stirring to obtain the finishing agent.

4. The preparation process of a lightweight and breathable ski functional fabric according to claim 3, characterized in that: The method for obtaining the silver chrysanthemum extract emulsion is as follows: the phloem of the stem of silver chrysanthemum is crushed and wet-ground to obtain a mixture. Aluminum sulfate and fatty alcohol polyoxyethylene ether are added to the mixture, stirred evenly, and reacted for 20-35 minutes. After washing with deionized water and centrifugation, a middle layer emulsion is obtained. After filtration, macroporous resin adsorption, and pH adjustment, the silver chrysanthemum extract emulsion is obtained.

5. The preparation process of a lightweight and breathable ski functional fabric according to claim 4, characterized in that: The macroporous resin is at least one of D101, AB-8, and HPD100 type macroporous adsorption resins.

6. The manufacturing process of a lightweight, breathable ski fabric according to claim 1, characterized in that: In step two, the mixed solvent is prepared by mixing dimethylformamide and acetone in a volume ratio of 6-8:2-4, and the mass fraction of TPU particles in the spinning solution is 12-18%. The pore size of the TPU nanofiber membrane is 0.2-0.8 μm.

7. The preparation process of a lightweight and breathable ski functional fabric according to claim 1, characterized in that: In step three, the mass ratio of the finished wool yarn to the nylon 66FDY yarn in the wool core-spun yarn is 2.5-4:1; The fineness of the nylon 66FDY yarn is 7-15D, and the wool yarn is 80-120 count ultrafine merino wool yarn.

8. The preparation process of a lightweight and breathable ski functional fabric according to claim 1, characterized in that: In step three, the fabric is woven in a plain weave, the warp density is 70-110 threads / cm, and the weft density is 60-80 threads / cm.

9. A lightweight and breathable ski fabric, characterized in that: It is prepared by any of the preparation processes described in 1-8 above.

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