High-hygroscopicity composite natural color cloth and preparation method thereof

Abstract

The invention relates to the technical field of natural color cloth, in particular to high-hygroscopicity composite natural color cloth and a preparation method thereof. The high-hygroscopicity composite natural color cloth comprises 40-50 parts of functional fibers, 30-35 parts of high-count combed cotton and 15-25 parts of lyocell fibers. According to the invention, the network provides a large number of capillary channels and a huge specific surface area, water molecules can be rapidly captured and conducted through physical adsorption and capillary action, silk fibroin is rich in hydrophilic amino acid, gallic acid molecules introduced through catalytic grafting of horse radish peroxidase additionally provide a large number of phenolic hydroxyl groups, and the water molecules can be rapidly captured and conducted. The strong polar groups can form strong hydrogen bonds with water molecules to realize efficient water locking, and finally, genipin establishes a stable covalent bond network between the colloidal suspension and the modified silk solution, so that a continuous and lasting transmission path is provided for adsorption and diffusion of water, and the efficient moisture absorption effect of the composite natural color cloth is ensured.

Description

Technical Field

[0001] This invention relates to the field of natural-colored fabric technology, specifically to a highly absorbent composite natural-colored fabric and its preparation method. Background Technology

[0002] Undyed fabric, also known as raw fabric or white fabric, refers to a fabric woven from yarns on a loom without undergoing bleaching, dyeing, printing, or other finishing processes. The quality of undyed fabric directly determines the effect of subsequent dyeing and finishing processes and the quality of the final product. High-quality undyed fabric requires a smooth and clean surface, few cotton knots and impurities, even warp and weft yarns, consistent tension, and good internal strength.

[0003] In existing technologies, the moisture absorption capacity and rate of traditional cotton fibers are limited. When the human body sweats or in high humidity environments, their insufficient moisture absorption directly leads to the inability of the fabric to absorb moisture quickly and in large quantities, which in turn causes obvious dampness and stuffiness, seriously affecting the dryness and comfort of wearing.

[0004] Based on this, the present invention provides a highly absorbent composite natural fabric and its preparation method. Summary of the Invention

[0005] The purpose of this invention is to provide a highly absorbent composite natural-colored fabric and its preparation method. The composite natural-colored fabric prepared by this invention not only has good moisture absorption properties, but also excellent antibacterial properties.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a highly absorbent composite natural fabric, comprising the following raw materials in parts by weight: 40-50 parts of functional fibers, 30-35 parts of high-count combed cotton, and 15-25 parts of lyocell fiber; The functional fiber is prepared by mixing a colloidal suspension and a modified silk solution at a mass ratio of 20-30:70-80, adding 1%-1.5% genipin (by mass of the total mass of the colloidal suspension and the modified silk solution) for cross-linking reaction, and then wet spinning.

[0007] Preferably, the preparation method of the functional fiber is as follows: A colloidal suspension and a modified silk solution are mixed, and genipin is added. The mixture is stirred at 200-400 rpm for 30-60 minutes at 30-40°C to obtain a primary spinning solution. The primary spinning solution is placed in a vacuum degassing machine and allowed to stand at -0.095 to -0.1 MPa for 20-40 minutes. After filtration through a 250-mesh sieve, the spinning solution is obtained. The spinning solution is injected into a spinning barrel and fed at 3-6 mL / min. It is then extruded through a spinneret with an aperture of 50-100 μm and fed into a spinning container containing 10-20 W Nascent fibers are obtained by holding the nascent fibers in a coagulation bath of t% sodium sulfate aqueous solution for 10-16 seconds at a temperature controlled at 20-30℃. The nascent fibers are then subjected to two-stage thermal stretching treatment using a thermal stretching device. The first stage stretching rate is controlled at 20-25% at a bath temperature of 50-55℃. The second stage stretching rate is 10-15% at a bath temperature of 70-75℃. Subsequently, the fibers are pre-dried in a hot air oven at 50-70℃ until the moisture content is below 10%. Finally, the fibers are placed in a steam setting chamber and treated in saturated steam at 85-95℃ for 5-15 minutes to obtain functional fibers.

[0008] Preferably, the preparation method of the colloidal suspension is as follows: Sea squirt cysts are washed, dried, pulverized, and passed through a 60-100 mesh sieve to obtain coarse sea squirt cyst powder. The coarse sea squirt cyst powder is mixed with 3-5 wt% sodium hydroxide at a ratio of 1:10-20, and stirred in a constant temperature water bath at 80°C at 100-300 rpm for 2-3 hours. The mixture is then centrifuged, and the solids are collected. The solids are filtered 2-4 times using 3-5 wt% sodium hydroxide, and then washed with deionized water until neutral. The solids are then dried in an oven at 60-80°C to obtain a first intermediate. The first intermediate is mixed with a mixed solvent at a ratio of 1:10-30, and then heated to 110°C in an oil bath and stirred for 4 hours under nitrogen protection. After 6 hours, the reaction solution was obtained. The reaction solution and ice water were mixed at a ratio of 1:30 and stirred at 800-1000 rpm for 10-30 minutes. After centrifugation, the regenerated cellulose precipitate was collected. The regenerated cellulose precipitate was then repeatedly washed with ethanol and water until the washing solution was neutral and the conductivity was close to that of deionized water to obtain regenerated sea squirt cellulose. The regenerated sea squirt cellulose was mixed with 2-4 wt% sodium hydroxide solution to obtain a suspension. The suspension was placed in a ball mill at a speed of 400-800 rpm and ball milled for 4-6 hours to obtain a ball milling solution. The ball milling solution was centrifuged at 8000-12000 rpm for 15-20 minutes, and the upper suspension containing nanocellulose was collected. The bottom precipitate was discarded, and after dialysis, a colloidal suspension was obtained.

[0009] Preferably, the mixed solvent is prepared by mixing choline chloride and oxalic acid in a molar ratio of 1:1.2.

[0010] Preferably, in the preparation process of the colloidal suspension, the dialysis step involves placing the supernatant into a dialysis bag with a molecular weight cutoff of 10-12 kDa and dialyzing it in flowing deionized water for 48-72 hours. The mass ratio of the regenerated sea squirt cellulose to 2-4 wt% sodium hydroxide solution is 1:50-200.

[0011] Preferably, the preparation steps of the silk solution are as follows: Waste silk is selected, shredded, and placed in a 0.5 wt% sodium carbonate aqueous solution. The solution is boiled at 100°C for 30-40 minutes, filtered to collect the solid, and washed with deionized water at 60-70°C until the effluent is neutral. The effluent is then placed in a blower and dried at 60-70°C to obtain silk fibroin fibers. The silk fibroin fibers are mixed with a 9.3 mol / L lithium bromide aqueous solution at a mass ratio of 1:8-12 in a reaction flask, and then placed in water at 60-65°C. The mixture is placed in a bath and stirred at 200-300 rpm for 4-6 hours. After cooling to room temperature, a silk fibroin solution is obtained. This solution is then dialyzed in more than 50 times its volume of deionized water for 2-3 days, with the deionized water changed 3-4 times daily. The mixture is then magnetically stirred at 10-20 rpm. After dialysis, the dialysis bag is immersed in a 20-30 wt% polyvinylpyrrolidone solution and allowed to stand at 4°C. The bag is then periodically observed and weighed until the concentration of silk fibroin reaches 8-12%, thus completing the preparation of the silk solution.

[0012] Preferably, the modified silk solution is prepared as follows: the protein concentration of the silk solution is adjusted to 1-5% using a phosphate buffer solution with a pH of 6.5-7 to obtain a diluted silk solution. Gallic acid and horseradish peroxidase are then added and mixed to obtain a second intermediate. The second intermediate is placed in a constant temperature water bath shaker at 25-35℃ with a rotation speed of 100-150 rpm, and kept in the dark throughout the process. 0.03% hydrogen peroxide solution is added dropwise, with the molar ratio of the 0.03% hydrogen peroxide solution to gallic acid being 0.8-1.2:1. The addition is completed within 2-4 hours. After reacting for 6-12 hours, the mixture is cooled in an ice-water bath to obtain a third intermediate. The third intermediate is placed in a dialysis bag and placed in a cold storage at 4℃. Dialysis is performed in more than 50 times the volume of deionized water for 2-3 days, during which the deionized water is changed 3-4 times a day, while maintaining magnetic stirring at 10-20 rpm to obtain the modified silk solution.

[0013] Preferably, the mass ratio of the diluted silk solution, gallic acid, and horseradish peroxidase is 100:2.8:0.3. During the preparation of the silk solution, the molecular weight cutoff of the dialysis bag is 10-12 kDa, and the molecular weight of the polyvinylpyrrolidone solution is greater than or equal to 20 kDa.

[0014] Preferably, during the preparation of the modified silk solution, the molecular weight cutoff of the dialysis bag is 12-14 kDa.

[0015] A method for preparing a highly absorbent composite unbleached fabric includes the following steps: Step 1: The functional fibers are first cut into short fibers of 36-38mm by a cutting machine, and then pretreated with spinning oil at a mass ratio of 100:0.5-1. Subsequently, the pretreated functional fibers, high-count combed cotton and Lyocell fibers are opened and impurities are removed, and then fed into a blending machine for thorough mixing, and then combed into sliver by a carding machine. Step 2: The raw sliver is processed into a mature sliver through 3-4 sizing processes, and then spun into a fine yarn with a linear density of 14.5-18.5 tex through roving and spinning processes. The twist coefficient of the fine yarn is controlled to be 280-320. Defects are removed from the fine yarn through a winding machine to produce packaged yarn. Step 3: The yarn is warped into a warp beam with uniform tension using a batch warping process. The warp beam is then sized with a composite sizing agent to control the sizing rate at 8-12% and the moisture regain at 6-8%. The composite sizing agent is made by mixing starch, polyvinyl alcohol and polyacrylic acid sizing agent in a mass ratio of 5.5:3.0:1.5.

[0016] Step 4: Using sized warp beams as warp yarns and cone yarns as weft yarns, weave plain weave on an air-jet loom, setting the warp and weft density to 290-310 warp yarns / 10cm and 230-250 weft yarns / 10cm, and the weaving speed to 400-500 r / min, to obtain a greige fabric with a uniform structure. Step 5: The fabric is desized and alkali-treated to remove impurities, then washed with hot water until neutral. The desizing is performed using hydrogen peroxide at a concentration of 3-5 g / L at 50-60℃ for 20-30 minutes, and the alkali-treated temperature is controlled at 55-60℃. Then, it is stretched and set under hot air at 80-85℃ for 10-15 minutes, with the width pre-shrinkage rate controlled at 3-5%, thus completing the preparation of the composite natural color fabric.

[0017] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, regenerated sea squirt cellulose undergoes deep dissociation and ball milling to form a highly dispersed three-dimensional nanofiber network rich in hydroxyl groups. This network provides a large number of capillary channels and a huge specific surface area, enabling it to rapidly capture and conduct water molecules through physical adsorption and capillary action. Secondly, silk fibroin itself is rich in hydrophilic amino acids, while gallic acid molecules introduced through horseradish peroxidase catalysis provide an additional large number of phenolic hydroxyl groups. These strongly polar groups can form strong hydrogen bonds with water molecules, achieving efficient water locking. Finally, genipin establishes a stable covalent bond network between the colloidal suspension and the modified silk solution, providing a continuous and durable transport path for the adsorption and diffusion of moisture, ensuring the efficient moisture absorption effect of the composite fabric.

[0018] 2. In this invention, gallic acid is covalently grafted onto the protein molecular chain of the silk solution during the spinning stage, and then blended with colloidal suspension and cross-linked with genipin before wet spinning. This achieves the embedding of functional groups, which firmly anchors the hydrophilic phenolic hydroxyl groups and antibacterial components to the fiber body, thus constructing a three-dimensional synergistic system consisting of a nanocellulose rapid moisture-wicking network, a modified protein water-locking network, and a cross-linking agent stable transport path. Attached Figure Description

[0019] Figure 1 The present invention provides a flowchart of a highly absorbent composite natural-colored fabric and its preparation method. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0021] It should be noted that the raw materials used in the following embodiments are all commercially available.

[0022] The spinning oil is CG298, produced by Ningbo Chenguang Textile Auxiliaries Co., Ltd. Gallic acid was purchased from Shanghai Maclean Biochemical Technology Co., Ltd., CAS No. 149-91-7; Horseradish peroxidase was purchased from Shanghai Maclean Biochemical Technology Co., Ltd., CAS No. 9003-99-0; Genipin was purchased from Shanghai Maclean Biochemical Technology Co., Ltd., CAS No. 6902-77-8; Choline chloride was purchased from Shanghai Maclean Biochemical Technology Co., Ltd., CAS No. 67-48-1; Oxalic acid was purchased from Shanghai Maclean Biochemical Technology Co., Ltd., CAS No. 62-76-0; Polyvinylpyrrolidone was purchased from Shanghai Maclean Biochemical Technology Co., Ltd., CAS No. 9003-39-8.

[0023] Example 1: A highly absorbent composite natural fabric comprises the following raw materials in parts by weight: 40 parts of functional fibers, 30 parts of high-count combed cotton, and 15 parts of lyocell fibers; The functional fiber is prepared by mixing a colloidal suspension and a modified silk solution at a mass ratio of 20:70, adding 1% genipin (by mass of the total mass of the colloidal suspension and the modified silk solution) for cross-linking reaction, and then wet spinning.

[0024] The preparation method of functional fibers is as follows: A colloidal suspension and a modified silk solution are mixed, and genipin is added. The mixture is stirred at 200 rpm for 30 minutes at 30°C to obtain a primary spinning solution. The primary spinning solution is placed in a vacuum degassing machine and allowed to stand at -0.095°C for 20 minutes. After filtration through a 250-mesh sieve, the spinning solution is obtained. The spinning solution is injected into a spinning barrel and fed at a rate of 3 mL / min. It is then extruded through a spinneret with a 50 μm aperture and fed into a spinneret containing 10 wt% sodium sulfate. The nascent fibers were obtained by holding them in a coagulation bath of an aqueous solution for 10 seconds at a temperature of 20°C. The nascent fibers were then subjected to two-stage thermal stretching treatment using a thermal stretching device. The first stage stretching rate was controlled at 20% and the bath temperature was 50°C. The second stage stretching rate was 10% and the bath temperature was increased to 70°C. Subsequently, the fibers were preliminarily dried in a hot air oven at 50°C until the moisture content was below 10%. Finally, the fibers were placed in a steam setting chamber and treated in saturated steam at 85°C for 5 minutes to obtain functional fibers.

[0025] The preparation method of the colloidal suspension is as follows: Sea squirt cysts are washed, dried, pulverized, and passed through a 60-mesh sieve to obtain coarse sea squirt cyst powder. The coarse sea squirt cyst powder is mixed with 3wt% sodium hydroxide at a ratio of 1:10 and stirred at 100 rpm for 2 hours in a constant temperature water bath at 80°C. The mixture is then centrifuged, and the solids are collected. The solids are filtered twice using 3wt% sodium hydroxide. The solids are then washed with deionized water until neutral and dried in an oven at 60°C to obtain the first intermediate. The first intermediate is mixed with a mixed solvent at a ratio of 1:10, then heated to 110°C in an oil bath and stirred for 4 hours under nitrogen protection to obtain... The reaction solution and ice water were mixed at a ratio of 1:30 and stirred at 800 rpm for 10 min. After centrifugation, the regenerated cellulose precipitate was collected. The precipitate was then repeatedly washed with ethanol and water until the wash solution was neutral and its conductivity was close to that of deionized water, thus obtaining regenerated sea squirt cellulose. The regenerated sea squirt cellulose was mixed with a 2 wt% sodium hydroxide solution to obtain a suspension. The suspension was placed in a ball mill and milled at 400 rpm for 4 h to obtain a ball milling solution. The ball milling solution was centrifuged at 8000 rpm for 15 min, and the upper suspension containing nanocellulose was collected. The bottom precipitate was discarded, and the colloidal suspension was obtained after dialysis.

[0026] The mixed solvent was prepared by mixing choline chloride and oxalic acid in a molar ratio of 1:1.2.

[0027] In the preparation of the colloidal suspension, the dialysis step involves loading the supernatant into a dialysis bag with a molecular weight cutoff of 10 kDa and dialyzing it in flowing deionized water for 48 hours. The mass ratio of regenerated sea squirt cellulose to 2 wt% sodium hydroxide solution is 1:50.

[0028] The preparation steps of the silk solution are as follows: Select waste silk, cut it into small pieces, and place it in a 0.5wt% sodium carbonate aqueous solution. Boil at 100℃ for 30 minutes, filter and collect the solid, and wash it with deionized water at 60℃ until the effluent is neutral. Then place it in a blower and dry it at 60℃ to obtain silk fibroin. Mix the silk fibroin with a 9.3mol / L lithium bromide aqueous solution at a mass ratio of 1:8 in a reaction flask, and then place it in a water bath at 60℃ and stir at 200rpm for 4 hours. Remove it and cool it to room temperature to obtain the silk fibroin solution. Dialyze it in more than 50 times its volume of deionized water for 2 days, changing the deionized water 3 times a day, while maintaining a magnetic stirring state of 10rpm. After dialysis, immerse the dialysis bag in a 20wt% polyvinylpyrrolidone solution and let it stand at 4℃. Observe it regularly and weigh it until the concentration of silk fibroin reaches 8%, thus completing the preparation of the silk solution.

[0029] The modified silk solution was prepared as follows: the protein concentration of the silk solution was adjusted to 1% using a phosphate buffer solution with a pH of 6.5 to obtain a diluted silk solution. Gallic acid and horseradish peroxidase were then added and mixed to obtain a second intermediate. The second intermediate was placed in a constant temperature water bath shaker at 25°C with a rotation speed of 100 rpm, and kept in the dark throughout the process. 0.03% hydrogen peroxide solution was added dropwise, with a molar ratio of 0.03% hydrogen peroxide solution to gallic acid of 0.8:1, and the addition was completed within 2 hours. After reacting for 6 hours, the mixture was cooled in an ice-water bath to obtain a third intermediate. The third intermediate was placed in a dialysis bag and placed in a cold storage at 4°C. Dialyzed in more than 50 times its volume of deionized water for 2 days, with the deionized water changed 3 times a day, while maintaining magnetic stirring at 10 rpm to obtain the modified silk solution.

[0030] The mass ratio of diluted silk solution, gallic acid, and horseradish peroxidase was 100:2.8:0.3. During the preparation of the silk solution, the molecular weight cutoff of the dialysis bag was 10 kDa, and the molecular weight of the polyvinylpyrrolidone solution was greater than or equal to 20 kDa.

[0031] In the preparation of modified silk solution, the molecular weight cutoff of the dialysis bag is 12 kDa.

[0032] A method for preparing a highly absorbent composite unbleached fabric includes the following steps: Step 1: The functional fibers are first cut into short fibers of 36mm by a cutting machine and pretreated with spinning oil at a mass ratio of 100:0.5. Then, the pretreated functional fibers, high-count combed cotton and Lyocell fibers are opened and impurities are removed. They are then fed into a blending machine for thorough mixing and carded into sliver by a carding machine. Step 2: The raw sliver is made into a mature sliver through three sizing processes, and then spun into a fine yarn with a linear density of 14.5 tex through roving and spinning processes. The twist coefficient of the fine yarn is controlled at 280. The fine yarn is then wound into a winding machine to remove defects and make a package yarn. Step 3: The yarn is warped into a warp beam with uniform tension using a batch warping process. The warp beam is then sized with a composite sizing agent, with the sizing rate controlled at 8% and the moisture regain at 6%. The composite sizing agent is made by mixing starch, polyvinyl alcohol, and polyacrylic acid sizing agent in a mass ratio of 5.5:3.0:1.5.

[0033] Step 4: Using sized warp beams as warp yarns and cone yarns as weft yarns, weave plain weave on an air-jet loom, setting the warp and weft density to 290 warp yarns / 10cm and 230 weft yarns / 10cm, and the weaving speed to 400r / min, to obtain a uniformly structured greige fabric. Step 5: The fabric is desized and alkali-cooked to remove impurities, washed with hot water until neutral, and desized by treating with 3g / L hydrogen peroxide at 50℃ for 20 minutes. The alkali-cooking temperature is controlled at 55℃. Then, it is stretched and set under hot air at 80℃ for 10 minutes, with the width pre-shrinkage rate controlled at 3%, thus completing the preparation of the composite natural color fabric.

[0034] Example 2: A highly absorbent composite natural fabric comprises the following raw materials in parts by weight: 45 parts of functional fibers, 32 parts of high-count combed cotton, and 20 parts of lyocell fiber; The functional fiber is prepared by mixing colloidal suspension and modified silk solution at a mass ratio of 25:75, adding genipin at a mass ratio of 1.2% of the total mass of colloidal suspension and modified silk solution for cross-linking reaction, and then wet spinning.

[0035] The preparation method of functional fibers is as follows: A colloidal suspension and a modified silk solution are mixed, and genipin is added. The mixture is stirred at 300 rpm for 45 minutes at 35°C to obtain a primary spinning solution. The primary spinning solution is then placed in a vacuum degassing machine and allowed to stand at -0.098 MPa for 30 minutes. After filtration through a 250-mesh sieve, the spinning solution is obtained. The spinning solution is injected into a spinning barrel and fed at a rate of 5 mL / min. It is then extruded through a spinneret with a 75 μm aperture and fed into a spinneret containing 15 wt% sulfuric acid. Nascent fibers were obtained by holding the sodium aqueous solution in a coagulation bath for 13 seconds at a temperature of 25°C. The nascent fibers were then subjected to two-stage thermal stretching treatment using a thermal stretching device. The first stage stretching rate was controlled at 22% and the bath temperature was 52°C. The second stage stretching rate was 12% and the bath temperature was increased to 72°C. Subsequently, the fibers were preliminarily dried in a hot air oven at 60°C until the moisture content was below 10%. Finally, the fibers were placed in a steam setting chamber and treated in saturated steam at 90°C for 10 minutes to obtain functional fibers.

[0036] The preparation method of the colloidal suspension is as follows: Sea squirt cysts are washed, dried, pulverized, and passed through an 80-mesh sieve to obtain coarse sea squirt cyst powder. The coarse sea squirt cyst powder is mixed with 3-5 wt% sodium hydroxide at a ratio of 1:15, and stirred at 200 rpm for 2.5 h in a constant temperature water bath at 80℃. The mixture is then centrifuged, and the solids are collected. The solids are filtered three times using 4 wt% sodium hydroxide. The solids are then washed with deionized water until neutral and dried in an oven at 70℃ to obtain the first intermediate. The first intermediate is mixed with a mixed solvent at a ratio of 1:20, then heated to 110℃ in an oil bath and stirred for 5 h under nitrogen protection. The reaction solution was obtained, and then mixed with ice water at a ratio of 1:30. After stirring at 900 rpm for 20 min, the mixture was centrifuged to collect the regenerated cellulose precipitate. The precipitate was then repeatedly washed with ethanol and water until the wash solution was neutral and its conductivity was close to that of deionized water to obtain regenerated sea squirt cellulose. The regenerated sea squirt cellulose was mixed with a 3 wt% sodium hydroxide solution to obtain a suspension. The suspension was placed in a ball mill and milled at 600 rpm for 5 h to obtain a ball milling solution. The ball milling solution was centrifuged at 10000 rpm for 17 min to collect the upper suspension containing nanocellulose. The bottom precipitate was discarded, and the mixture was dialyzed to obtain a colloidal suspension.

[0037] The mixed solvent was prepared by mixing choline chloride and oxalic acid in a molar ratio of 1:1.2.

[0038] In the preparation of the colloidal suspension, the dialysis step involves loading the supernatant into a dialysis bag with a molecular weight cutoff of 11 kDa and dialyzing it in flowing deionized water for 60 hours. The mass ratio of regenerated sea squirt cellulose to 3 wt% sodium hydroxide solution is 1:150.

[0039] The preparation steps of the silk solution are as follows: Select waste silk, cut it into small pieces, and place it in a 0.5wt% sodium carbonate aqueous solution. Boil at 100℃ for 35 minutes, filter to collect the solid, and wash it with deionized water at 65℃ until the effluent is neutral. Then place it in a blower and dry it at 65℃ to obtain silk fibroin. Mix the silk fibroin with a 9.3mol / L lithium bromide aqueous solution at a mass ratio of 1:10 in a reaction flask, then place it in a water bath at 62℃ and stir at 250rpm for 5 hours. Remove it and cool it to room temperature to obtain the silk fibroin solution. Dialyze it in more than 50 times its volume of deionized water for 2 days, changing the deionized water 3 times a day while maintaining magnetic stirring at 15rpm. After dialysis, immerse the dialysis bag in a 25wt% polyvinylpyrrolidone solution and let it stand at 4℃. Observe it regularly and weigh it until the concentration of silk fibroin reaches 10%, thus completing the preparation of the silk solution.

[0040] The modified silk solution was prepared as follows: the protein concentration of the silk solution was adjusted to 3% using a phosphate buffer solution with a pH of 6.8 to obtain a diluted silk solution. Gallic acid and horseradish peroxidase were then added and mixed to obtain a second intermediate. The second intermediate was placed in a constant temperature water bath shaker at 30°C with a rotation speed of 120 rpm, and kept in the dark throughout the process. 0.03% hydrogen peroxide solution was added dropwise, with a molar ratio of 0.03% hydrogen peroxide solution to gallic acid of 1:1, and the addition was completed within 3 hours. After reacting for 9 hours, the mixture was cooled in an ice-water bath to obtain a third intermediate. The third intermediate was placed in a dialysis bag and placed in a cold storage at 4°C. Dialyzed in more than 50 times its volume of deionized water for 2 days, with the deionized water changed 3 times a day, while maintaining magnetic stirring at 15 rpm to obtain the modified silk solution.

[0041] The mass ratio of diluted silk solution, gallic acid, and horseradish peroxidase was 100:2.8:0.3. During the preparation of the silk solution, the molecular weight cutoff of the dialysis bag was 11 kDa, and the molecular weight of the polyvinylpyrrolidone solution was greater than or equal to 20 kDa.

[0042] In the preparation of modified silk solution, the molecular weight cutoff of the dialysis bag is 13 kDa.

[0043] A method for preparing a highly absorbent composite unbleached fabric includes the following steps: Step 1: The functional fibers are first cut into short fibers of 37mm by a cutting machine and pretreated with spinning oil at a mass ratio of 100:0.7. Then, the pretreated functional fibers, high-count combed cotton and Lyocell fibers are opened and impurities are removed. They are then fed into a blending machine for thorough mixing and carded into sliver by a carding machine. Step 2: The raw sliver is made into a mature sliver through three sizing processes, and then spun into a fine yarn with a linear density of 16.5 tex through roving and spinning processes. The twist coefficient of the fine yarn is controlled at 300. The fine yarn is then wound into a winding machine to remove defects and make a package yarn. Step 3: The yarn is warped into a warp beam with uniform tension using a batch warping process. The warp beam is then sized with a composite sizing agent, with the sizing rate controlled at 10% and the moisture regain at 7%. The composite sizing agent is made by mixing starch, polyvinyl alcohol, and polyacrylic acid sizing agent in a mass ratio of 5.5:3.0:1.5.

[0044] Step 4: Using sized warp beams as warp yarns and cone yarns as weft yarns, weave plain weave on an air-jet loom, setting the warp and weft density to 300 warp yarns / 10cm and 240 weft yarns / 10cm, and the weaving speed to 450 r / min, to obtain a uniformly structured greige fabric. Step 5: The fabric is desized and alkali-cooked to remove impurities, washed with hot water until neutral, and desized by treating with 4g / L hydrogen peroxide at 55℃ for 25 minutes. The alkali-cooking temperature is controlled at 57℃. Then, it is stretched and set under hot air at 82℃ for 12 minutes, with the width pre-shrinkage rate controlled at 4%, to complete the preparation of the composite natural color fabric.

[0045] Example 3: A highly absorbent composite natural fabric comprises the following raw materials in parts by weight: 50 parts of functional fibers, 35 parts of high-count combed cotton, and 25 parts of lyocell fibers; The functional fiber is prepared by mixing colloidal suspension and modified silk solution at a mass ratio of 30:80, adding genipin at a mass ratio of 1.5% of the total mass of colloidal suspension and modified silk solution for cross-linking reaction, and then wet spinning.

[0046] The preparation method of functional fibers is as follows: A colloidal suspension and a modified silk solution are mixed, and genipin is added. The mixture is stirred at 400 rpm for 60 minutes at 40°C to obtain a primary spinning solution. The primary spinning solution is then placed in a vacuum degassing machine and allowed to stand at -0.1 MPa for 40 minutes. After filtration through a 250-mesh sieve, the spinning solution is obtained. The spinning solution is injected into a spinning barrel and fed at a rate of 6 mL / min. It is then extruded through a 100 μm orifice spinneret and fed into a spinneret containing 20 wt% sulfuric acid. Nascent fibers were obtained by holding the sodium aqueous solution in a coagulation bath for 16 seconds at a temperature of 30°C. The nascent fibers were then subjected to two-stage thermal stretching treatment using a thermal stretching device. The first stage stretching rate was controlled at 25% at a bath temperature of 55°C, and the second stage stretching rate was 15% at a bath temperature of 75°C. Subsequently, the fibers were preliminarily dried in a hot air oven at 70°C until the moisture content was below 10%. Finally, the fibers were placed in a steam setting chamber and treated in saturated steam at 95°C for 15 minutes to obtain functional fibers.

[0047] The preparation method of the colloidal suspension is as follows: Sea squirt cysts are washed, dried, pulverized, and passed through a 100-mesh sieve to obtain coarse sea squirt cyst powder. The coarse sea squirt cyst powder is mixed with 5 wt% sodium hydroxide at a ratio of 1:20, and stirred at 300 rpm for 3 hours in a constant temperature water bath at 80°C. The mixture is then centrifuged, and the solids are collected. The solids are filtered four times using 5 wt% sodium hydroxide. The solids are then washed with deionized water until neutral and dried in an oven at 80°C to obtain the first intermediate. The first intermediate is mixed with a mixed solvent at a ratio of 1:30, then heated to 110°C in an oil bath and stirred for 6 hours under nitrogen protection to obtain... The reaction solution was mixed with ice water at a ratio of 1:30 and stirred at 1000 rpm for 30 min. After centrifugation, the regenerated cellulose precipitate was collected. The precipitate was then repeatedly washed with ethanol and water until the washings were neutral and had a conductivity close to that of deionized water, yielding regenerated sea squirt cellulose. The regenerated sea squirt cellulose was mixed with a 4 wt% sodium hydroxide solution to obtain a suspension. The suspension was placed in a ball mill and milled at 800 rpm for 6 h to obtain a ball milling solution. The ball milling solution was centrifuged at 12000 rpm for 20 min, and the upper suspension containing nanocellulose was collected. The bottom precipitate was discarded, and the colloidal suspension was obtained after dialysis.

[0048] The mixed solvent was prepared by mixing choline chloride and oxalic acid in a molar ratio of 1:1.2.

[0049] In the preparation of the colloidal suspension, the dialysis step involves loading the supernatant into a dialysis bag with a molecular weight cutoff of 12 kDa and dialyzing it in flowing deionized water for 72 hours. The mass ratio of regenerated sea squirt cellulose to 4 wt% sodium hydroxide solution is 1:200.

[0050] The preparation steps of the silk solution are as follows: Select waste silk, cut it into small pieces, and place it in a 0.5wt% sodium carbonate aqueous solution. Boil at 100℃ for 40 minutes, filter to collect the solid, and wash with deionized water at 70℃ until the effluent is neutral. Then place it in a blower and dry at 70℃ to obtain silk fibroin. Mix the silk fibroin with a 9.3mol / L lithium bromide aqueous solution at a mass ratio of 1:12 in a reaction flask, then place it in a water bath at 65℃ and stir at 300rpm for 6 hours. Remove and cool to room temperature to obtain the silk fibroin solution. Dialyze it in more than 50 times its volume of deionized water for 3 days, changing the deionized water 4 times a day while maintaining magnetic stirring at 20rpm. After dialysis, immerse the dialysis bag in a 30wt% polyvinylpyrrolidone solution and let it stand at 4℃. Observe and weigh it periodically until the concentration of silk fibroin reaches 12%, thus completing the preparation of the silk solution.

[0051] The modified silk solution was prepared as follows: the protein concentration of the silk solution was adjusted to 5% using a phosphate buffer solution with pH 7 to obtain a diluted silk solution. Gallic acid and horseradish peroxidase were then added and mixed to obtain a second intermediate. The second intermediate was placed in a constant temperature water bath shaker at 35°C with a rotation speed of 150 rpm, and kept in the dark throughout the process. 0.03% hydrogen peroxide solution was added dropwise, with a molar ratio of 0.03% hydrogen peroxide solution to gallic acid of 1.2:1, and the addition was completed within 4 hours. After reacting for 12 hours, the mixture was cooled in an ice-water bath to obtain a third intermediate. The third intermediate was placed in a dialysis bag and placed in a cold storage at 4°C. Dialyzed in more than 50 times its volume of deionized water for 3 days, with the deionized water changed 4 times a day, while maintaining magnetic stirring at 20 rpm to obtain the modified silk solution.

[0052] The mass ratio of diluted silk solution, gallic acid, and horseradish peroxidase was 100:2.8:0.3. During the preparation of the silk solution, the molecular weight cutoff of the dialysis bag was 12 kDa, and the molecular weight of the polyvinylpyrrolidone solution was greater than or equal to 20 kDa.

[0053] In the preparation of modified silk solution, the molecular weight cutoff of the dialysis bag is 14 kDa.

[0054] A method for preparing a highly absorbent composite unbleached fabric includes the following steps: Step 1: The functional fibers are first cut into short fibers of 36-38mm by a cutting machine, and then pretreated with spinning oil at a mass ratio of 100:1. Subsequently, the pretreated functional fibers, high-count combed cotton and Lyocell fibers are opened and impurities are removed, and then fed into a blending machine for thorough mixing, and then combed into sliver by a carding machine. Step 2: The raw sliver is made into a mature sliver through four sizing processes, and then spun into a fine yarn with a linear density of 18.5 tex through roving and spinning processes. The twist coefficient of the fine yarn is controlled at 320. The fine yarn is then wound into a winding machine to remove defects and make a package yarn. Step 3: The yarn is warped into a warp beam with uniform tension using a batch warping process. The warp beam is then sized with a composite sizing agent, with the sizing rate controlled at 12% and the moisture regain at 8%. The composite sizing agent is made by mixing starch, polyvinyl alcohol, and polyacrylic acid sizing agent in a mass ratio of 5.5:3.0:1.5.

[0055] Step 4: Using sized warp beams as warp yarns and cone yarns as weft yarns, weave plain weave on an air-jet loom, setting the warp and weft density to 310 warp yarns / 10cm and 250 weft yarns / 10cm, and the weaving speed to 500 r / min, to obtain a uniformly structured greige fabric. Step 5: The fabric is desized and alkali-cooked to remove impurities, washed with hot water until neutral, and desized by treating with 5g / L hydrogen peroxide at 60℃ for 30 minutes. The alkali-cooking temperature is controlled at 60℃. Then, it is stretched and set under hot air at 85℃ for 15 minutes, with the width pre-shrinkage rate controlled at 5%, to complete the preparation of the composite natural color fabric.

[0056] Comparative Example 1: The difference between this comparative example and Example 1 is that this comparative example does not contain functional fibers, and all functional fibers are replaced with lyocell fibers of equal mass.

[0057] Comparative Example 2: The difference between this comparative example and Example 1 is that the modified silk solution is replaced with an equal mass of unmodified silk solution in this comparative example.

[0058] Comparative Example 3 differs from Example 1 in that the mass ratio of the colloidal suspension to the modified silk solution in the preparation of functional fibers in this comparative example is 10:80. Comparative Example 4 differs from Example 1 in that, in the preparation of this comparative example, genipin was replaced by a 25% aqueous solution of glutaraldehyde.

[0059] Performance testing: The composite natural-colored fabrics prepared in Examples 1-3 and Comparative Examples 1-4 were subjected to performance tests, and the test data are recorded in the table below: Moisture permeability test: The moisture permeability of the composite undyed fabric was determined according to GB / T12704-2009 "Textiles - Test methods for moisture permeability of fabrics - Part 1: Moisture absorption method". Antibacterial test: The antibacterial properties of the composite undyed fabric were determined according to GB / T20944.3-2008 "Evaluation of antibacterial properties of textiles - Part 3: Vibration method"; Moisture regain test: GB / T 9995-1997 "Determination of moisture content and moisture regain of textile materials - Oven drying method" tests the moisture regain of composite undyed fabric; Table 1 Performance Test Table for Composite Natural Fabric

[0060] In Examples 1-3, the regenerated sea squirt cellulose exhibits higher natural purity and accessibility. Its hydrogen bond network is relatively weak, and after processing and mechanical ball milling, it can be more efficiently and with lower energy consumption dissociated into nanocellulose with a high aspect ratio. The material's excellent hygroscopic and permeable properties mainly originate from the amphiphilic network and hierarchical channels within the functional fibers. First, the regenerated sea squirt cellulose undergoes deep dissociation and ball milling to form a highly dispersed and hydroxyl-rich three-dimensional nanofiber network. This network provides numerous capillary channels and a large specific surface area, enabling… The silk fibroin rapidly captures and conducts water molecules through physical adsorption and capillary action. Secondly, the silk fibroin itself is rich in hydrophilic amino acids, and the gallic acid molecules introduced by horseradish peroxidase catalysis provide an additional large number of phenolic hydroxyl groups. These strongly polar groups can form strong hydrogen bonds with water molecules to achieve efficient water locking. Finally, genipin establishes a stable covalent bond network between the colloidal suspension and the modified silk solution, fixing these hydrophilic components and forming stable micropores that run through the fiber, ensuring the smooth and long-lasting moisture transport channels and guaranteeing efficient moisture absorption. Gallic acid, as a natural polyphenol, has a multifaceted and highly efficient antibacterial mechanism. It can disrupt the integrity of microbial cell membranes, leading to leakage of contents; it can chelate essential metal ions of microorganisms, interfering with their enzyme activity and metabolism; it can also penetrate into the cell, interfering with the synthesis of nucleic acids and proteins. Through enzymatic catalysis, gallic acid is covalently grafted onto silk fibroin chains and further anchored within the fiber network through genipin crosslinking, preventing the dissolution and loss of antibacterial components, thus endowing the material with durable and broad-spectrum antibacterial properties. In Comparative Example 1, functional fibers were completely absent, consisting only of ordinary high-count combed cotton and Lyocell fibers. Although these two fibers have a certain degree of hydrophilicity, their specific surface area, hydrophilic group density, and micropore structure are far inferior to the bihydrophilic network constructed by colloidal suspension and modified protein. They mainly rely on the amorphous regions of the fibers themselves to absorb moisture, and their moisture absorption capacity and rate are limited. At the same time, since they do not contain any antibacterial active ingredients, the material does not have any inherent antibacterial ability. In Comparative Example 2, silk solution was used instead of modified silk solution. Although the silk solution had good hydrophilicity, making its moisture absorption and permeability better than Comparative Example 1, its antibacterial performance dropped sharply due to the lack of the key gallic acid antibacterial active group. However, the small amount of antibacterial amino acids contained in silk fibroin itself and the genipin crosslinking agent itself also had certain antibacterial activity, ensuring a certain level of antibacterial performance. In Comparative Example 3, the proportion of colloidal suspension was significantly reduced. Although the excessively high proportion of protein provided more hydrophilic groups and made the moisture regain acceptable, the severe weakening of the nanocellulose skeleton led to the destruction of the network dominated by the nanocellulose network for rapid water conduction and diffusion. Therefore, the increase in moisture permeability was limited and failed to reach the level of the example. At the same time, the reduction of the cellulose skeleton may also have affected the uniform distribution and stability of antibacterial components in the fiber. In Comparative Example 4, although glutaraldehyde can react efficiently with protein amino groups to form a cross-linked network, the reaction is violent, the cross-linking is too high and uncontrollable, resulting in an overly dense fiber structure and the failure of some hydrophilic properties.

[0061] By comparing and analyzing the relevant data in the table, it can be seen that the composite natural-colored fabric prepared by this invention not only has good moisture absorption properties but also excellent antibacterial properties. This indicates that the highly absorbent composite natural-colored fabric provided by this invention has a broader market prospect and is more suitable for widespread application.

[0062] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0063] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A highly absorbent composite natural-colored fabric, characterized in that: The raw materials include the following parts by weight: 40-50 parts functional fiber, 30-35 parts high-count combed cotton, and 15-25 parts lyocell fiber; The functional fiber is prepared by mixing a colloidal suspension and a modified silk solution at a mass ratio of 20-30:70-80, adding 1%-1.5% genipin (by mass of the total mass of the colloidal suspension and the modified silk solution) for cross-linking reaction, and then wet spinning.

2. The highly absorbent composite natural-colored fabric according to claim 1, characterized in that, The preparation method of the functional fiber is as follows: A colloidal suspension and a modified silk solution are mixed, and genipin is added. The mixture is stirred at 200-400 rpm for 30-60 minutes at 30-40°C to obtain a primary spinning solution. The primary spinning solution is placed in a vacuum degassing machine and allowed to stand for 20-40 minutes at -0.095 to -0.1 MPa. After filtration through a 250-mesh sieve, the spinning solution is obtained. The spinning solution is injected into a spinning barrel and fed at 3-6 mL / min. It is then extruded through a spinneret with an aperture of 50-100 μm and fed into a spinning container containing 10-20 wt% of [unspecified fiber]. Nascent fibers are obtained by holding the nascent fibers in a coagulation bath of sodium sulfate aqueous solution for 10-16 seconds at a temperature controlled at 20-30℃. The nascent fibers are then subjected to two-stage thermal stretching treatment using a thermal stretching device. The first stage stretching rate is controlled at 20-25% at a bath temperature of 50-55℃. The second stage stretching rate is 10-15% at a bath temperature of 70-75℃. Subsequently, the fibers are pre-dried in a hot air oven at 50-70℃ until the moisture content is below 10%. Finally, the fibers are placed in a steam setting chamber and treated in saturated steam at 85-95℃ for 5-15 minutes to obtain functional fibers.

3. The highly absorbent composite natural-colored fabric according to claim 1, characterized in that, The preparation method of the colloidal suspension is as follows: Sea squirt cysts are washed, dried, pulverized, and passed through a 60-100 mesh sieve to obtain coarse sea squirt cyst powder. The coarse sea squirt cyst powder is mixed with 3-5 wt% sodium hydroxide at a ratio of 1:10-20, and stirred in an 80°C constant temperature water bath at 100-300 rpm for 2-3 hours. The mixture is then centrifuged, and the solids are collected. The solids are filtered 2-4 times using 3-5 wt% sodium hydroxide, and then washed with deionized water until neutral. The solids are then dried in an oven at 60-80°C to obtain a first intermediate. The first intermediate is mixed with a mixed solvent at a ratio of 1:10-30, and then heated to 110°C in an oil bath and stirred for 4-6 hours under nitrogen protection. The reaction solution was obtained, and the reaction solution and ice water were mixed at a ratio of 1:

30. After stirring at 800-1000 rpm for 10-30 min, the mixture was centrifuged and the regenerated cellulose precipitate was collected. The regenerated cellulose precipitate was then repeatedly washed with ethanol and water until the washing solution was neutral and the conductivity was close to that of deionized water to obtain regenerated sea squirt cellulose. The regenerated sea squirt cellulose was mixed with 2-4 wt% sodium hydroxide solution to obtain a suspension. The suspension was placed in a ball mill and milled at 400-800 rpm for 4-6 h to obtain a ball milling solution. The ball milling solution was centrifuged at 8000-12000 rpm for 15-20 min, and the upper suspension containing nanocellulose was collected. The bottom precipitate was discarded, and the mixture was dialyzed to obtain a colloidal suspension.

4. The highly absorbent composite natural-colored fabric according to claim 3, characterized in that, The mixed solvent is prepared by mixing choline chloride and oxalic acid in a molar ratio of 1:1.

2.

5. The highly absorbent composite natural-colored fabric according to claim 2, characterized in that, In the preparation of the colloidal suspension, the dialysis step involves loading the supernatant into a dialysis bag with a molecular weight cutoff of 10-12 kDa and dialyzing it in flowing deionized water for 48-72 hours. The mass ratio of the regenerated sea squirt cellulose to 2-4 wt% sodium hydroxide solution is 1:50-200.

6. The highly absorbent composite natural-colored fabric according to claim 1, characterized in that, The modified silk solution is prepared as follows: the protein concentration of the silk solution is adjusted to 1-5% using a phosphate buffer solution with a pH of 6.5-7 to obtain a diluted silk solution. Gallic acid and horseradish peroxidase are then added and mixed to obtain a second intermediate. The second intermediate is placed in a constant temperature water bath shaker at 25-35℃ with a rotation speed of 100-150 rpm, and kept in the dark throughout the process. 0.03% hydrogen peroxide solution is added dropwise, with a molar ratio of 0.03% hydrogen peroxide solution to gallic acid of 0.8-1.2:

1. The addition is completed within 2-4 hours. After reacting for 6-12 hours, the mixture is cooled in an ice-water bath to obtain a third intermediate. The third intermediate is placed in a dialysis bag and placed in a cold storage at 4℃. Dialysis is performed in more than 50 times the volume of deionized water for 2-3 days, with the deionized water changed 3-4 times a day, while maintaining magnetic stirring at 10-20 rpm to obtain the modified silk solution.

7. The highly absorbent composite natural-colored fabric according to claim 6, characterized in that, The preparation steps of the silk solution are as follows: Select waste silk, cut it into small pieces, and place it in a 0.5 wt% sodium carbonate aqueous solution. Boil at 100℃ for 30-40 minutes, filter to collect the solid, and wash with deionized water at 60-70℃ until the effluent is neutral. Then place it in a blower and dry at 60-70℃ to obtain silk fibroin fibers. Mix the silk fibroin fibers with a 9.3 mol / L lithium bromide aqueous solution at a mass ratio of 1:8-12 in a reaction flask, and then place it in a water bath at 60-65℃. The mixture is stirred at 200-300 rpm for 4-6 hours, then cooled to room temperature to obtain a silk fibroin solution. This solution is then dialyzed in more than 50 times its volume of deionized water for 2-3 days, with the deionized water changed 3-4 times daily, while maintaining magnetic stirring at 10-20 rpm. After dialysis, the dialysis bag is immersed in a 20-30 wt% polyvinylpyrrolidone solution and allowed to stand at 4°C. The bag is then periodically observed and weighed until the concentration of silk fibroin reaches 8-12%, thus completing the preparation of the silk solution.

8. The highly absorbent composite natural-colored fabric according to claim 7, characterized in that, The mass ratio of the diluted silk solution, gallic acid, and horseradish peroxidase is 100:2.8:0.

3. During the preparation of the silk solution, the molecular weight cutoff of the dialysis bag is 10-12 kDa, and the molecular weight of the polyvinylpyrrolidone solution is greater than or equal to 20 kDa.

9. The highly absorbent composite natural-colored fabric according to claim 8, characterized in that, In the preparation of the modified silk solution, the molecular weight cutoff of the dialysis bag is 12-14 kDa.

10. The method for preparing the highly absorbent composite natural-colored fabric according to claims 1 to 9, characterized in that, Includes the following steps: Step 1: The functional fibers are first cut into short fibers of 36-38mm by a cutting machine, and then pretreated with spinning oil at a mass ratio of 100:0.5-1. Subsequently, the pretreated functional fibers, high-count combed cotton and Lyocell fibers are opened and impurities are removed, and then fed into a blending machine for thorough mixing, and then combed into sliver by a carding machine. Step 2: The raw sliver is processed into a mature sliver through 3-4 sizing processes, and then spun into a fine yarn with a linear density of 14.5-18.5 tex through roving and spinning processes. The twist coefficient of the fine yarn is controlled to be 280-320. Defects are removed from the fine yarn through a winding machine to produce packaged yarn. Step 3: The yarn is warped into a warp beam with uniform tension using a batch warping process. The warp beam is then sized with a composite sizing agent to control the sizing rate at 8-12% and the moisture regain at 6-8%. The composite sizing agent is a mixture of starch, polyvinyl alcohol, and polyacrylic acid sizing agent in a mass ratio of 5.5:3.0:1.

5. Step 4: Using sized warp beams as warp yarns and cone yarns as weft yarns, weave plain weave on an air-jet loom, setting the warp and weft density to 290-310 warp yarns / 10cm and 230-250 weft yarns / 10cm, and the weaving speed to 400-500 r / min, to obtain a greige fabric with a uniform structure. Step 5: The fabric is desized and alkali-treated to remove impurities, then washed with hot water until neutral. The desizing is performed using hydrogen peroxide at a concentration of 3-5 g / L at 50-60℃ for 20-30 minutes, and the alkali-treated temperature is controlled at 55-60℃. Then, it is stretched and set under hot air at 80-85℃ for 10-15 minutes, with the width pre-shrinkage rate controlled at 3-5%, thus completing the preparation of the composite natural color fabric.

Images