Preparation method of environment-friendly quick-drying school uniform fabric

Abstract

The invention relates to the field of school uniform fabric production, in particular to a preparation method of an environment-friendly quick-drying school uniform fabric, which comprises the following preparation steps: S1: material selection, S2: fiber functionalization treatment, S21: plasma surface modification, S22: enzymatic polishing, S3: blended yarn preparation and fabric weaving, S4: fabric dyeing, S5: multifunctional composite finishing, S51: spraying of a waterborne polyurethane coating, S52: ozone washing water softening, s6, carrying out post-treatment; the regenerated polyester, the organic cotton and other raw materials are adopted, the regenerated polyester is made of recycled PET plastic bottles and is environmentally friendly and economical, polar groups on the surface of the regenerated polyester are activated through plasma surface modification, the hygroscopicity is greatly improved, the quick-drying performance is enhanced, and by means of a unique double-layer honeycomb mesh structure and a double-strand yarn optimization treatment mode, the moisture absorption performance is greatly improved. A multidirectional moisture guiding channel is formed, and the moisture evaporation rate is increased, so that the prepared school uniform fabric is environment-friendly, durable and comfortable while maintaining high-breathability and quick-drying performance.

Description

Technical Field

[0001] The present invention relates to the field of school uniform fabric production, and in particular to a method for preparing environmentally friendly quick-drying school uniform fabric. Background Art

[0002] School uniforms may seem like simple clothing, but they are actually companions on the students' path of growth. They witness the years of youth and carry educational dreams. They are a unique and beautiful landscape on campus. They have strong practical value. Students have rich daily activities, from classroom learning to exercise during breaks. Uniform clothing makes it convenient to move. They don't have to worry about what to wear every day and can devote more energy to learning. At the same time, uniform school uniforms avoid clothing comparisons among students and help create an equal and pure learning atmosphere, so that every student can focus on acquiring knowledge and self-growth. School uniforms are also an important carrier of campus culture. They carry the spirit and tradition of the school. Every design detail may contain the school's values ​​​​and educational concepts. When wearing school uniforms, students are closely connected with the school, which enhances their sense of belonging and collective honor. In campus activities, uniform school uniforms can allow students to show the style of the school with a uniform image and convey a positive spirit. However, traditional school uniform fabrics are usually made of pure cotton or nylon, which have shortcomings in quick-drying and wear resistance. In particular, when students exercise, sweat is retained and cannot evaporate quickly, resulting in discomfort when wearing. In addition, due to the limited number of matching school uniforms, frequent washing will accelerate fabric wear and shorten the service life of the school uniforms, thereby increasing replacement and maintenance costs. Therefore, the environmentally friendly quick-drying school uniform fabric produced by the preparation method of the present invention solves the technical difficulties in the use of traditional school uniform fabrics. Summary of the Invention

[0003] In order to overcome the shortcomings of traditional school uniform fabrics in terms of quick drying and wear resistance, and the problem that frequent washing affects the service life.

[0004] The technical solution of the present invention is: a method for preparing environmentally friendly quick-drying school uniform fabric, the preparation steps of which are as follows:

[0005] S1: Material selection: recycled polyester, organic cotton, modal fiber and linen / Tencel blended fiber were selected as raw materials;

[0006] S2: fiber functionalization treatment;

[0007] S21: Plasma surface modification: Recycled polyester is added to an atmospheric pressure plasma continuous treatment device for low-temperature plasma treatment. The treatment time is controlled within 3-5 minutes to activate the polar groups on the fiber surface and improve hygroscopicity.

[0008] S22: Enzyme polishing: immerse the organic cotton and modal fiber in the enzyme solution together to ensure complete immersion. Place them in a constant temperature environment at 50°C for 20-30 minutes. Stir every 5 minutes during the treatment process to ensure full contact between the enzyme solution and the fiber. After the treatment is completed, remove the fiber and rinse it thoroughly with clean water to remove residual enzyme solution. Finally, dry the fiber in the air or lay it flat in a hot air circulation oven at 60°C to complete the enzymatic polishing.

[0009] S3: Preparation of blended yarn and fabric weaving: Pre-treated regenerated polyester, organic cotton, and modal fibers are mixed and spun using a siro compact spinning device. 75D / 72F regenerated polyester filament is selected and treated with a texturing machine to form a spiral curled structure to obtain the outer yarn. 40s linen / Tencel blended yarn is then selected and twisted by 10%-20% using a compact siro spinning process to obtain the inner yarn. The prepared outer yarn and inner yarn are then tightly ply-plyed with a plying machine to form a two-ply yarn. The fabric is then woven using a dedicated loom to produce a fabric with a honeycomb mesh structure on the surface and a plain weave structure on the inner layer.

[0010] S4: Fabric dyeing: The fabric to be dyed is placed in a dedicated supercritical CO2 dyeing device to ensure that the fabric is spread flat in the device without wrinkles. Then, high-purity CO2 gas is filled into the device and the pressure and temperature are gradually increased. Natural plant dyes are then injected into the dyeing device and dyeing is continued for 30-60 minutes. After the dyeing time is over, the next step is entered;

[0011] S5: Multifunctional composite finishing;

[0012] S51: Spraying a water-based polyurethane coating, pouring the prepared water-based polyurethane coating agent into the liquid storage tank of the spraying equipment, placing the fabric steadily on the spraying workbench, starting the spraying equipment, and making the spray gun spray reciprocatingly on the fabric surface at a uniform speed and distance. After the spraying is completed, the fabric is sent to a drying equipment for drying treatment to fully solidify the coating agent and form a flexible protective film with a thickness of 0.1-0.3 μm on the fabric surface;

[0013] S52: Ozone washing and softening: Place the sprayed fabric into the ozone washing equipment, inject an appropriate amount of water into the equipment to completely immerse the fabric in the water, then introduce ozone into the washing equipment and stir for 15-20 minutes to ensure that the ozone can evenly contact the fabric. After the treatment time is over, remove the fabric from the ozone washing equipment and rinse it thoroughly with clean water to remove any residual ozone and impurities on the fabric surface.

[0014] S6: Post-processing: Dehydrating the rinsed fabric. Centrifugal dehydration or squeezing dehydration can be used to remove most of the moisture in the fabric. The dehydrated fabric is then sent to a drying device for final drying to obtain a finished product.

[0015] Preferably, the weight portion of recycled polyester in S1 is 50-55 parts, the weight portion of organic cotton is 15-20 parts, the weight portion of modal fiber is 10-15 parts, and the weight portion of flax / Tencel blended fiber is 20-25 parts.

[0016] Preferably, the regenerated polyester is made from recycled PET plastic bottles by melt spinning, and the fiber cross section is a hollow cross-shaped structure with a hollow pore diameter of 5-8 μm and a cross wall thickness of 1-2 μm.

[0017] Preferably, the process parameters of the low-temperature plasma treatment in S21 are: vacuum pressure 8-12 Pa, argon flow rate 10-15 L / min, and power 80-100 W.

[0018] Preferably, the concentration of the enzyme solution in S22 is 2-3%, and the pH value is 4.5-5.5. The preparation steps are: accurately weigh cellulase with an activity of ≥2000 U / g, dissolve it in acetic acid-sodium acetate buffer at pH 4.5, stir until completely dissolved, and then preheat the enzyme solution to 50°C to prepare the enzyme solution.

[0019] As a preferred option, the double-layer honeycomb mesh fabric in S3 has a gram weight of 150-160g / m 2 , warp density 280-300 strands / 10cm, weft density 240-260 strands / 10cm.

[0020] Preferably, the pressure of the supercritical CO2 anhydrous dyeing equipment in S4 should be gradually increased to 20-30 MPa, while the temperature should be precisely controlled within the range of 100-120°C.

[0021] Preferably, the natural plant dye in S4 is indigo extract or madder extract.

[0022] Preferably, the drying temperature of the drying equipment in S51 is controlled within the range of 80-120° C., and the drying time is controlled within 2-5 minutes.

[0023] Preferably, in the ozone washing and softening process of S52, the ozone concentration is controlled within the range of 50-80ppm, and the ozone generator power is controlled within the range of 500-800W.

[0024] Beneficial effects of the present invention:

[0025] A method for preparing environmentally friendly quick-drying school uniform fabric uses recycled polyester, organic cotton and other raw materials. The recycled polyester is made from recycled PET plastic bottles, which is environmentally friendly and economical. The polar groups on the surface of the recycled polyester are activated through plasma surface modification, which greatly improves the hygroscopicity, accelerates the volatilization of sweat, and enhances the quick-drying performance. In addition, enzymatic polishing makes the surface of organic cotton and modal fiber smoother, reduces friction, and improves wearing comfort. The unique double-layer honeycomb mesh structure and double-ply yarn optimization processing method not only form multiple moisture-conducting channels, but also increase the water evaporation rate. The sweat after exercise can be completely dried within 5 minutes, avoiding stuffiness and discomfort, and reducing friction and fuzzing, taking into account both breathability and wear resistance. A flexible protective film is formed by spraying a water-based polyurethane coating, which effectively improves the wear resistance of the fabric and reduces the risk of wear caused by cleaning. The ozone washing and softening treatment makes the fabric softer and provides a better wearing experience. Through material compounding and process innovation, the present invention makes the prepared school uniform fabric maintain high breathability and quick-drying properties while being environmentally friendly, durable and comfortable, which can meet the needs of students' high-intensity activities and long-term wear. DETAILED DESCRIPTION

[0026] The present invention will be further described below with reference to the embodiments.

[0027] Example 1

[0028] S1: Material selection: weigh 50 parts of recycled polyester, 15 parts of organic cotton, 10 parts of modal fiber, and 20 parts of linen / Tencel blended fiber, where the recycled polyester is made from recycled PET plastic bottles by melt spinning.

[0029] S2: fiber functionalization treatment;

[0030] S21: Plasma surface modification: Recycled polyester was added to an atmospheric pressure plasma continuous treatment device with a power of 80W. Low-temperature plasma treatment was performed under the conditions of a vacuum pressure of 8Pa and an argon flow rate of 10L / min for 3 minutes to activate the polar groups on the fiber surface and improve its hygroscopicity.

[0031] S22: Enzyme polishing: immerse the organic cotton and modal fibers together in an enzyme solution with a concentration of 2% and a pH of 4.5, ensuring complete immersion. Place the fibers in a constant temperature environment at 50°C for 20 minutes. Stir every 5 minutes during the treatment process to ensure full contact between the enzyme solution and the fibers. After the treatment is completed, remove the fibers and rinse them thoroughly with clean water to remove any residual enzyme solution. Finally, air-dry the fibers to complete the enzymatic polishing process to reduce hairiness and pilling.

[0032] S3: Preparation of blended yarn and fabric weaving. Pre-treated regenerated polyester, organic cotton and modal fibers are mixed and spun using a siro compact spinning device. 75D / 72F regenerated polyester filament is selected and treated with a texturing machine to form a spiral curled structure to obtain the outer yarn. Subsequently, 40s flax / Tencel blended yarn is selected and spun by increasing the twist by 10% and using a compact siro spinning process to obtain the inner yarn. The prepared outer yarn and the inner yarn are then tightly ply-plyed with a plying machine to form a double-ply yarn, which is then woven on a dedicated loom to produce a 150g / m2 yarn. 2 , the fabric has a warp density of 280 threads / 10cm, a weft density of 240 threads / 10cm, a honeycomb mesh structure on the surface and a plain weave structure on the inner layer;

[0033] S4: Fabric dyeing: The fabric to be dyed is loaded into a dedicated supercritical CO2 dyeing device to ensure that the fabric is spread flat in the device without wrinkles. Then, high-purity CO2 gas is filled into the device and gradually pressurized to 20MPa. At the same time, the temperature is precisely controlled at 100°C. Indigo extract is injected into the dyeing device and dyeing is continued for 30 minutes. After the dyeing time is completed, the next step is entered;

[0034] S5: Multifunctional composite finishing;

[0035] S51: Spraying a water-based polyurethane coating: pour the prepared water-based polyurethane coating agent into the liquid storage tank of the spraying equipment, place the fabric steadily on the spraying workbench, start the spraying equipment, and make the spray gun spray reciprocatingly on the fabric surface at a uniform speed and distance. After the spraying is completed, the fabric is sent to a drying equipment at 80°C for 2 minutes to fully cure the coating agent and form a flexible protective film with a thickness of 0.1 μm on the fabric surface;

[0036] S52: Ozone washing and softening: Place the sprayed fabric into the ozone washing equipment, inject an appropriate amount of water into the equipment to completely immerse the fabric in the water, then introduce ozone with a concentration of 50ppm into the washing equipment and stir for 15 minutes to ensure that the ozone can evenly contact the fabric. After the treatment time is over, remove the fabric from the ozone washing equipment and rinse it thoroughly with clean water to remove any residual ozone and impurities on the fabric surface;

[0037] S6: Post-processing: Dehydrating the rinsed fabric. Centrifugal dehydration or squeezing dehydration can be used to remove most of the moisture in the fabric. The dehydrated fabric is then sent to a drying device for final drying to obtain a finished product.

[0038] Example 2

[0039] S1: Material selection: 52 parts of recycled polyester, 18 parts of organic cotton, 12 parts of modal fiber, and 23 parts of linen / Tencel blended fiber were weighed, wherein the recycled polyester was made by melt spinning of recycled PET plastic bottles.

[0040] S2: fiber functionalization;

[0041] S21: Plasma surface modification: Recycled polyester was added to a 90W atmospheric pressure plasma continuous treatment device and subjected to low-temperature plasma treatment at a vacuum pressure of 10 Pa and an argon flow rate of 13 L / min for 4 minutes to activate polar groups on the fiber surface and improve hygroscopicity.

[0042] S22: Enzyme polishing: immerse the organic cotton and modal fibers together in an enzyme solution with a concentration of 2.5% and a pH value of 5, ensuring complete infiltration. Place the fibers in a constant temperature environment at 50°C for 25 minutes, stirring every 5 minutes during the treatment process to ensure full contact between the enzyme solution and the fibers. After the treatment is complete, remove the fibers and rinse them thoroughly with clean water to remove residual enzyme solution. Finally, spread the fibers flat in a 60°C hot air circulation oven to dry them to complete the enzymatic polishing process to reduce hairiness and pilling.

[0043] S3: Preparation of blended yarn and fabric weaving. Pre-treated regenerated polyester, organic cotton and modal fibers are mixed and spun using a siro compact spinning device. 75D / 72F regenerated polyester filament is selected and treated with a texturing machine to form a spiral curled structure to obtain the outer yarn. Subsequently, 40s flax / Tencel blended yarn is selected and spun by increasing the twist by 15% and using a compact siro spinning process to obtain the inner yarn. The prepared outer yarn and the inner yarn are then tightly ply-plyed with a plying machine to form a double-ply yarn, which is then woven on a dedicated loom to produce a 155g / m2 yarn. 2 , the fabric has a warp density of 290 threads / 10cm, a weft density of 250 threads / 10cm, a honeycomb mesh structure on the surface and a plain weave structure on the inner layer;

[0044] S4: Fabric dyeing: The fabric to be dyed is loaded into a dedicated supercritical CO2 dyeing device to ensure that the fabric is spread flat in the device without wrinkles or accumulation. Then, high-purity CO2 gas is filled into the device and gradually pressurized to 25MPa. At the same time, the temperature is precisely controlled at 110°C. Indigo extract is injected into the dyeing device and dyeing is continued for 40 minutes. After the dyeing time is completed, the next step is entered;

[0045] S5: Multifunctional composite finishing;

[0046] S51: spraying a water-based polyurethane coating, pouring the prepared water-based polyurethane coating agent into the liquid storage tank of the spraying equipment, placing the fabric steadily on the spraying workbench, starting the spraying equipment, and making the spray gun spray reciprocatingly on the fabric surface at a uniform speed and distance. After the spraying is completed, the fabric is sent to a drying equipment at 100°C for 4 minutes to fully cure the coating agent and form a flexible protective film with a thickness of 0.2μm on the fabric surface;

[0047] S52: Ozone washing and softening: Place the sprayed fabric into the ozone washing equipment, inject an appropriate amount of water into the equipment to completely immerse the fabric in the water, then introduce ozone with a concentration of 70ppm into the washing equipment and stir for 18 minutes to ensure that the ozone can evenly contact the fabric. After the treatment time is over, remove the fabric from the ozone washing equipment and rinse it thoroughly with clean water to remove any residual ozone and impurities on the fabric surface;

[0048] S6: Post-processing: Dehydrating the rinsed fabric. Centrifugal dehydration or squeezing dehydration can be used to remove most of the moisture in the fabric. The dehydrated fabric is then sent to a drying device for final drying to obtain a finished product.

[0049] Example 3

[0050] S1: Material selection: 55 parts of recycled polyester, 20 parts of organic cotton, 15 parts of modal fiber, and 25 parts of linen / Tencel blended fiber were weighed, wherein the recycled polyester was made by melt spinning of recycled PET plastic bottles.

[0051] S2: fiber functionalization treatment;

[0052] S21: Plasma surface modification: The recycled polyester was added to a 100W atmospheric pressure plasma continuous treatment device and subjected to low-temperature plasma treatment at a vacuum pressure of 12 Pa and an argon flow rate of 15 L / min for 5 minutes to activate the polar groups on the fiber surface and improve its hygroscopicity.

[0053] S22: Enzymatic polishing: immerse the organic cotton and modal fibers together in an enzyme solution with a concentration of 3% and a pH of 5.5, ensuring complete infiltration. Place the fibers in a constant temperature environment at 50°C for 30 minutes, stirring every 5 minutes during the treatment process to ensure full contact between the enzyme solution and the fibers. After the treatment is complete, remove the fibers and rinse them thoroughly with clean water to remove residual enzyme solution. Finally, spread the fibers flat in a 60°C hot air circulation oven to dry them to complete the enzymatic polishing process to reduce hairiness and pilling.

[0054] S3: Preparation of blended yarn and fabric weaving. Pre-treated regenerated polyester, organic cotton and modal fibers are mixed and spun using a siro compact spinning device. 75D / 72F regenerated polyester filament is selected and treated with a texturing machine to form a spiral curled structure to obtain the outer yarn. Subsequently, 40s flax / Tencel blended yarn is selected and spun by increasing the twist by 20% and using a compact siro spinning process to obtain the inner yarn. The prepared outer yarn and the inner yarn are then tightly ply-plyed with a plying machine to form a double-ply yarn, which is then woven on a dedicated loom to produce a 160g / m2 yarn. 2 , the fabric has a warp density of 300 threads / 10cm, a weft density of 260 threads / 10cm, a honeycomb mesh structure on the surface and a plain weave structure on the inner layer;

[0055] S4: Fabric dyeing: The fabric to be dyed is placed in a dedicated supercritical CO2 dyeing device to ensure that the fabric is spread flat in the device without wrinkles. Then, high-purity CO2 gas is filled into the device and gradually pressurized to 30MPa. At the same time, the temperature is precisely controlled at 120°C. Rubia cordifolia extract is injected into the dyeing device and dyeing is continued for 60 minutes. After the dyeing time is completed, the next step is entered;

[0056] S5: Multifunctional composite finishing;

[0057] S51: spraying a water-based polyurethane coating, pouring the prepared water-based polyurethane coating agent into the liquid storage tank of the spraying equipment, placing the fabric steadily on the spraying workbench, starting the spraying equipment, and making the spray gun spray reciprocatingly on the fabric surface at a uniform speed and distance. After the spraying is completed, the fabric is sent to a drying equipment at 120°C for drying for 5 minutes to fully cure the coating agent and form a flexible protective film with a thickness of 0.3 μm on the fabric surface;

[0058] S52: Ozone washing and softening: Place the sprayed fabric into the ozone washing equipment, inject an appropriate amount of water into the equipment to completely immerse the fabric in the water, then introduce ozone with a concentration of 80ppm into the washing equipment and stir for 20 minutes to ensure that the ozone can evenly contact the fabric. After the treatment time is over, remove the fabric from the ozone washing equipment and rinse it thoroughly with clean water to remove any residual ozone and impurities on the fabric surface;

[0059] S6: Post-processing: Dehydrating the rinsed fabric. Centrifugal dehydration or squeezing dehydration can be used to remove most of the moisture in the fabric. The dehydrated fabric is then sent to a drying device for final drying to obtain a finished product.

[0060] The embodiments of the present invention have been described in detail above, but the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge of those skilled in the art without departing from the spirit of the present invention.

Claims

1. A method for preparing environmentally friendly quick-drying school uniform fabric, characterized by: The preparation steps are as follows: S1: Material selection: recycled polyester, organic cotton, modal fiber and linen / Tencel blended fiber were selected as raw materials; S2: fiber functionalization; S21: Plasma surface modification: Recycled polyester is added to an atmospheric pressure plasma continuous treatment device for low-temperature plasma treatment. The treatment time is controlled within 3-5 minutes to activate the polar groups on the fiber surface and improve hygroscopicity. S22: Enzyme polishing: immerse the organic cotton and modal fiber in the enzyme solution together to ensure complete immersion. Place them in a constant temperature environment at 50°C for 20-30 minutes. Stir every 5 minutes during the treatment process to ensure full contact between the enzyme solution and the fiber. After the treatment is completed, remove the fiber and rinse it thoroughly with clean water to remove residual enzyme solution. Finally, dry the fiber in the air or lay it flat in a hot air circulation oven at 60°C to complete the enzymatic polishing. S3: Preparation of blended yarn and fabric weaving: Pre-treated regenerated polyester, organic cotton, and modal fibers are mixed and spun using a siro compact spinning device. 75D / 72F regenerated polyester filament is selected and treated with a texturing machine to form a spiral curled structure to obtain the outer yarn. 40s linen / Tencel blended yarn is then selected and twisted by 10%-20% using a compact siro spinning process to obtain the inner yarn. The prepared outer yarn and inner yarn are then tightly ply-plyed with a plying machine to form a two-ply yarn. The fabric is then woven using a dedicated loom to produce a fabric with a honeycomb mesh structure on the surface and a plain weave structure on the inner layer. S4: Fabric dyeing: The fabric to be dyed is placed in a dedicated supercritical carbon dioxide dyeing device to ensure that the fabric is spread flat in the device without wrinkles. Then, high-purity carbon dioxide gas is filled into the device and the pressure and temperature are gradually increased. Natural plant dyes are then injected into the dyeing device and dyeing is continued for 30-60 minutes. After the dyeing time is completed, the next step is entered; S5: Multifunctional composite finishing; S51: Spraying a water-based polyurethane coating, pouring the prepared water-based polyurethane coating agent into the liquid storage tank of the spraying equipment, placing the fabric steadily on the spraying workbench, starting the spraying equipment, and making the spray gun spray reciprocatingly on the fabric surface at a uniform speed and distance. After the spraying is completed, the fabric is sent to a drying equipment for drying treatment to fully solidify the coating agent and form a flexible protective film with a thickness of 0.1-0.3 μm on the fabric surface; S52: Ozone washing and softening: Place the sprayed fabric into the ozone washing equipment, inject an appropriate amount of water into the equipment to completely immerse the fabric in the water, then introduce ozone into the washing equipment and stir for 15-20 minutes to ensure that the ozone can evenly contact the fabric. After the treatment time is over, remove the fabric from the ozone washing equipment and rinse it thoroughly with clean water to remove any residual ozone and impurities on the fabric surface. S6: Post-processing: Dehydrating the rinsed fabric. Centrifugal dehydration or squeezing dehydration can be used to remove most of the moisture in the fabric. The dehydrated fabric is then sent to a drying device for final drying to obtain a finished product.

2. The method for preparing an environmentally friendly quick-drying school uniform fabric according to claim 1, characterized in that: In S1, the weight proportion of recycled polyester is 50-55 parts, the weight proportion of organic cotton is 15-20 parts, the weight proportion of modal fiber is 10-15 parts, and the weight proportion of flax / Tencel blended fiber is 20-25 parts.

3. The method for preparing an environmentally friendly quick-drying school uniform fabric according to claim 2, characterized in that: Recycled polyester is made from recycled PET plastic bottles through melt spinning. The fiber cross-section is a hollow cross-shaped structure with a hollow pore diameter of 5-8μm and a cross wall thickness of 1-2μm.

4. The method for preparing an environmentally friendly quick-drying school uniform fabric according to claim 1, characterized in that: The process parameters of low-temperature plasma treatment in S21 are: vacuum pressure 8-12Pa, argon flow rate 10-15L / min, and power 80-100W.

5. The method for preparing an environmentally friendly quick-drying school uniform fabric according to claim 1, characterized in that: The enzyme solution in S22 has a concentration of 2-3% and a pH of 4.5-5.

5. The preparation steps are as follows: accurately weigh cellulase with an activity of ≥2000 U / g, dissolve it in acetic acid-sodium acetate buffer at pH 4.5, stir until completely dissolved, and then preheat the enzyme solution to 50°C to prepare the enzyme solution.

6. The method for preparing an environmentally friendly quick-drying school uniform fabric according to claim 1, characterized in that: The double-layer honeycomb mesh structure fabric in S3 has a grammage of 150-160g / m 2 , warp density 280-300 strands / 10cm, weft density 240-260 strands / 10cm.

7. The method for preparing an environmentally friendly quick-drying school uniform fabric according to claim 1, characterized in that: The pressure of the supercritical carbon dioxide anhydrous dyeing equipment in S4 should be gradually increased to 20-30MPa, and the temperature should be accurately controlled within the range of 100-120℃.

8. The method for preparing an environmentally friendly quick-drying school uniform fabric according to claim 1, characterized in that: The natural plant dye in S4 is indigo extract or madder extract.

9. The method for preparing an environmentally friendly quick-drying school uniform fabric according to claim 1, characterized in that: The drying temperature of the drying equipment in S51 is controlled within the range of 80-120° C., and the drying time is controlled within 2-5 minutes.

10. The method for preparing an environmentally friendly quick-drying school uniform fabric according to claim 1, characterized in that: During the ozone washing and softening process of S52, the ozone concentration is controlled within the range of 50-80ppm, and the ozone generator power is controlled within the range of 500-800W.