A light and thin embroidery fabric and a preparation method thereof

Abstract

The present application relates to a kind of light and thin embroidery fabric and its preparation method, belong to fabric technical field, the preparation method includes: S1, preparation modified polyurethane emulsion, cotton fiber and polyester fiber are immersed in modified polyurethane emulsion, dry, the cotton fiber and polyester fiber after treatment are obtained, for standby;S2, take the cotton fiber and polyester fiber after treatment, prepare light and thin yarn using the way of Siro compact spinning, plain weave, obtain light and thin base cloth;S3, preparation finishing liquor;S4, light and thin base cloth is soaked in finishing liquor according to bath ratio, take out, lay on the calender roll, roll liquid, take out the fabric, dry, obtain light and thin embroidery fabric.The sulfonic acid group and polyethylene glycol segment introduced in modified polyurethane, cotton fiber and polyester fiber are immersed in modified polyurethane emulsion, microcrystalline cellulose and chitosan are added in finishing liquor, improve the tensile resistance, hydrophilicity and dyeing rate of light and thin embroidery fabric.

Description

A lightweight embroidered fabric and its preparation method Technical Field

[0001] This invention belongs to the high-performance polyester industry, and more specifically relates to the field of fabric technology, specifically to a lightweight embroidered fabric and its preparation method. Background Technology

[0002] Embroidery, a time-honored surface decoration technique, imbues textiles with high artistic value and visual appeal through the creative combination of needle and thread with fibers. It is widely used in high-end fashion, home furnishings, and arts and crafts, placing higher demands on the thinness and lightness of embroidered fabrics. In traditional embroidery, the needle repeatedly pierces the fabric, causing the thread to weave through it. This pulls and compresses the fabric fibers. Continuous needlework subjects the fabric to sustained tension in specific areas, leading to stretching and deformation. In areas of high stress, breakage may occur, damaging the embroidered pattern and severely affecting the overall aesthetics of the work. It can also damage already completed sections, increasing the difficulty and workload of repairs.

[0003] On the other hand, the dyeing performance of embroidered products also faces challenges. Many high-end embroidered pieces require overall dyeing after the embroidery is completed to achieve unique color effects. The dyeing properties of different fibers in blended fabrics vary greatly, often requiring a two-bath dyeing process or complex dyeing techniques, increasing energy consumption and production costs. Traditional methods involve adding reinforcing coatings or base layers to the fabric surface. While these provide stability for the embroidery, their inherent hydrophobicity or chemical inertness often hinders the diffusion and penetration of dye molecules into the fiber interior during the dyeing process, leading to low dye uptake, insufficient color vibrancy, and even uneven dyeing. This creates an irreconcilable contradiction between the fabric's embroidery processing performance and its dyeing performance.

[0004] In summary, the problems of deformation, breakage, damage, low dye uptake, and uneven dyeing of lightweight fabrics during embroidery and dyeing processes seriously affect the artistic quality of embroidered works and the quality stability of dyed fabrics. With the improvement of people's living standards and the continuous improvement of requirements for textile quality, the market demand for high-quality, personalized embroidered and dyed textiles is growing. Therefore, developing a high-performance fabric that is not easily deformed, broken, or damaged during embroidery, and that promotes dye uptake during dyeing, is of significant practical importance. Summary of the Invention

[0005] The purpose of this invention is to provide a lightweight embroidered fabric and its preparation method, which solves the problems of easy deformation, breakage and damage, low dyeing rate, insufficient color brightness and even uneven dyeing of lightweight embroidered fabrics in the prior art.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] A lightweight embroidered fabric and its preparation method, wherein the preparation method specifically includes the following steps:

[0008] S1. Prepare a modified polyurethane emulsion by impregnating cotton fibers and polyester fibers in the modified polyurethane emulsion and drying them to obtain the treated cotton fibers and polyester fibers for later use.

[0009] S2. Take the treated cotton fibers and polyester fibers, prepare lightweight yarns using Siro compact spinning, and weave them in plain weave to obtain a lightweight base fabric.

[0010] S3. Prepare the finishing solution;

[0011] S4. Soak the thin base fabric in the finishing solution according to the bath ratio, take it out, lay it flat on the rolling mill roller, roll it with the solution, take out the fabric, and dry it to obtain the thin embroidered fabric.

[0012] As a preferred technical solution of the present invention, step S1 specifically includes:

[0013] Dried isophorone diisocyanate, polycaprolactone diol, and dibutyl dilaurate are mixed and stirred under controlled temperature once to obtain intermediate material A. 2-Acrylamido-2-methylpropanesulfonic acid, polyethylene glycol, and dimethylolpropionic acid are added sequentially to intermediate material A, and stirred under controlled temperature a second time to obtain intermediate material B. Deionized water is added to adjust the pH, and the mixture is stirred at high speed and cooled to obtain modified polyurethane emulsion. Cotton fibers and polyester fibers are impregnated in the modified polyurethane emulsion and dried to obtain treated cotton fibers and polyester fibers for later use.

[0014] Further, the temperature of the first temperature-controlled stirring is 80-90℃, and the time is 2-3 hours; the temperature of the second temperature-controlled stirring is 60-70℃, and the time is 20-40 minutes; the pH adjustment is achieved by adding triethylamine to adjust the pH to 7.5-8.5; the high-speed stirring speed is 1500-1800 r / min, and the time is 30-40 minutes; the cooling is achieved by cooling to room temperature; the impregnation time is 20-30 minutes; and the drying temperature is 40-60℃, and the time is 50-60 minutes.

[0015] Further, the mass ratio of isophorone diisocyanate, polycaprolactone diol, and dibutyltin dilaurate is 5-7:8-10:1-2; the amount of 2-acrylamido-2-methylpropanesulfonic acid added is 2-3% of the mass of intermediate material A; the amount of polyethylene glycol added is 3-5% of the mass of intermediate material A; the amount of dimethylolpropionic acid added is 6-8% of the mass of intermediate material A; and the amount of deionized water added is 3-5 times the mass of intermediate material B.

[0016] Furthermore, the polyethylene glycol includes PEG400 or PEG600.

[0017] As a preferred embodiment of the present invention, the mass ratio of cotton fiber to polyester fiber after treatment in step S2 is 2-4:5-7.

[0018] As a preferred technical solution of the present invention, step S3 specifically includes:

[0019] Choline chloride and oxalic acid are mixed and stirred at a controlled temperature until a homogeneous and clear liquid is formed, which is the eutectic solvent. Microcrystalline cellulose is added to the eutectic solvent, and stirred at a controlled temperature a second time. After dialysis, the mixture is ultrasonically dispersed, and the supernatant is collected by centrifugation to obtain mixture A. Chitosan is dissolved in dilute acetic acid solution to obtain chitosan solution. Mix mixture A and chitosan solution are mixed to obtain mixture B. Epichlorohydrin is added to mixture B and stirred evenly to obtain finishing solution.

[0020] Furthermore, the temperature of the first temperature-controlled stirring is 70-80℃; the temperature of the second temperature-controlled stirring is 85-95℃, and the time is 4-6 hours.

[0021] Further, the mass ratio of choline chloride to oxalic acid is 2-3:1-2; the amount of microcrystalline cellulose added is 1-3 wt% of the eutectic solvent; the mass concentration of the dilute acetic acid solution is 1-3%; the volume ratio of chitosan to dilute acetic acid solution is 1 g:100-120 mL; the mass ratio of mixture A to chitosan solution is 4-6:1-3; and the amount of epichlorohydrin added is 3-5% of the mass of mixture B.

[0022] As a preferred embodiment of the present invention, the bath ratio in step S4 is 1g:40-50mL; the soaking time is 30-60min; the rolling residue rate is 65-75%; and the drying temperature is 100-110℃ for 1-2h.

[0023] The beneficial effects of this invention are:

[0024] This invention impregnates cotton and polyester fibers in a modified polyurethane emulsion. Utilizing the film-forming properties of the polymer, the fibers condense on the fiber surface, reducing slippage between fibers and providing a binding effect to resist the tensile stress caused by repeated piercing of embroidery threads. The invention also incorporates microcrystalline cellulose, which has high crystallinity and rigidity, into the fabric, thereby improving the tensile strength, modulus, and other mechanical properties of lightweight embroidered fabrics. This makes them less prone to deformation, breakage, and damage during embroidery, greatly enhancing the tensile strength of lightweight embroidered fabrics.

[0025] (2) The sulfonic acid groups and polyethylene glycol segments introduced into the modified polyurethane in this invention can maintain the strong hydrophilicity of the polyurethane film condensed on the outside of the thin embroidered fabric. The polyethylene glycol segments have a good interaction with water molecules through ether oxygen bonds, which can promote the spreading and diffusion of dye molecules in water and promote the color uptake rate in the dyeing process.

[0026] (3) The present invention adds microcrystalline cellulose and chitosan to the finishing solution. Both microcrystalline cellulose and chitosan contain a large number of hydrophilic groups such as hydroxyl groups. When they are introduced into the composite of thin embroidered fabric, hydrophilic sites can be formed on the surface or inside of the thin embroidered fabric, which enhances the adsorption of dye molecules in water during dyeing, thereby improving the dyeing rate and making the dyeing more uniform and the color more vibrant. Detailed Implementation

[0027] 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.

[0028] The polycaprolactone diol used in the embodiments, comparative examples and test examples of this invention, model number 2202, was purchased from Wuhan Haishan Technology Co., Ltd.; further details will not be repeated hereafter.

[0029] Example 1

[0030] A lightweight embroidered fabric and its preparation method, the preparation method specifically including the following steps:

[0031] S1. Mix dried isophorone diisocyanate, polycaprolactone diol, and dibutyltin dilaurate, and stir at 80°C for 2.5 hours to obtain intermediate material A. Add 2-acrylamido-2-methylpropanesulfonic acid, PEG600, and dimethylolpropionic acid to intermediate material A in sequence, and stir at 70°C for 30 minutes to obtain intermediate material B. Add deionized water to intermediate material B, add triethylamine to adjust the pH to 8.5, stir at 1650 r / min for 30 minutes, and cool to room temperature to obtain modified polyurethane emulsion. Impregnate cotton fibers and polyester fibers in the modified polyurethane emulsion for 20 minutes, and dry at 50°C for 60 minutes to obtain treated cotton fibers and polyester fibers for later use.

[0032] The mass ratio of isophorone diisocyanate, polycaprolactone diol, and dibutyltin dilaurate is 5:8:2; the amount of 2-acrylamido-2-methylpropanesulfonic acid added is 3% of the mass of intermediate material A; the amount of PEG600 added is 3% of the mass of intermediate material A; the amount of dimethylolpropionic acid added is 7% of the mass of intermediate material A; and the amount of deionized water added is 3 times the mass of intermediate material B.

[0033] S2. Take the treated cotton fiber and polyester fiber at a mass ratio of 3:5, prepare lightweight yarn by Siro compact spinning, and weave it in plain weave to obtain lightweight base fabric.

[0034] S3. Mix choline chloride and oxalic acid, and stir at 75°C until a homogeneous and clear liquid is formed, which is the eutectic solvent. Add microcrystalline cellulose to the eutectic solvent, and stir at 95°C for 5 hours. After dialysis, disperse by ultrasonication, and centrifuge to obtain the supernatant, which is the mixture A. Dissolve chitosan in dilute acetic acid solution to obtain chitosan solution. Mix mixture A with chitosan solution to obtain mixture B. Add epichlorohydrin to mixture B and stir until homogeneous to obtain the finishing solution.

[0035] The mass ratio of choline chloride to oxalic acid is 2.5:1; the amount of microcrystalline cellulose added is 2 wt% of the eutectic solvent; the mass concentration of the dilute acetic acid solution is 3%; the ratio of chitosan to dilute acetic acid solution is 1 g:100 mL; the mass ratio of mixture A to chitosan solution is 4:3; and the amount of epichlorohydrin added is 4% of the mass of mixture B.

[0036] S4. Soak the thin base fabric in the finishing solution at a bath ratio of 1g:40mL for 45 minutes, take it out, lay it flat on the roller of the rolling mill, and roll it with the liquid, with a residual rate of 70%. Take out the fabric and dry it at 100℃ for 1.5 hours to obtain the thin embroidered fabric.

[0037] Example 2

[0038] A lightweight embroidered fabric and its preparation method, the preparation method specifically including the following steps:

[0039] S1. Mix dried isophorone diisocyanate, polycaprolactone diol, and dibutyltin dilaurate, and stir at 85°C for 3 hours to obtain intermediate material A. Add 2-acrylamido-2-methylpropanesulfonic acid, PEG600, and dimethylolpropionic acid to intermediate material A in sequence, and stir at 60°C for 40 minutes to obtain intermediate material B. Add deionized water to intermediate material B, add triethylamine to adjust the pH to 7.5, stir at 1800 r / min for 40 minutes, and cool to room temperature to obtain modified polyurethane emulsion. Impregnate cotton fibers and polyester fibers in the modified polyurethane emulsion for 30 minutes, and dry at 60°C for 55 minutes to obtain treated cotton fibers and polyester fibers for later use.

[0040] The mass ratio of isophorone diisocyanate, polycaprolactone diol, and dibutyltin dilaurate is 6:10:1.5; the amount of 2-acrylamido-2-methylpropanesulfonic acid added is 2% of the mass of intermediate material A; the amount of PEG600 added is 4% of the mass of intermediate material A; the amount of dimethylolpropionic acid added is 6% of the mass of intermediate material A; and the amount of deionized water added is 5 times the mass of intermediate material B.

[0041] S2. Take the treated cotton fiber and polyester fiber at a mass ratio of 2:7, prepare lightweight yarn by Siro compact spinning, and weave it in plain weave to obtain lightweight base fabric.

[0042] S3. Mix choline chloride and oxalic acid, and stir at 80°C until a homogeneous and clear liquid is formed, which is the eutectic solvent. Add microcrystalline cellulose to the eutectic solvent, and stir at 85°C for 4 hours. After dialysis, disperse by ultrasonication, and centrifuge to obtain the supernatant, which is the mixture A. Dissolve chitosan in dilute acetic acid solution to obtain chitosan solution. Mix the nanocellulose suspension with the chitosan solution to obtain mixture B. Add epichlorohydrin to mixture B and stir until homogeneous to obtain the finishing solution.

[0043] The mass ratio of choline chloride to oxalic acid is 2:2; the amount of microcrystalline cellulose added is 3 wt% of the eutectic solvent; the mass concentration of the dilute acetic acid solution is 1%; the ratio of chitosan to dilute acetic acid solution is 1 g: 120 mL; the mass ratio of mixture A to chitosan solution is 6:2; and the amount of epichlorohydrin added is 5% of the mass of mixture B.

[0044] S4. Soak the thin base fabric in the finishing solution at a bath ratio of 1g:50mL for 30 minutes, take it out, lay it flat on the roller of the rolling mill, and roll it with the liquid. The residual rate is 75%. Take out the fabric and dry it at 105℃ for 1 hour to obtain the thin embroidered fabric.

[0045] Example 3

[0046] A lightweight embroidered fabric and its preparation method, the preparation method specifically including the following steps:

[0047] S1. Mix dried isophorone diisocyanate, polycaprolactone diol, and dibutyltin dilaurate, and stir at 90°C for 2 hours to obtain intermediate material A. Add 2-acrylamido-2-methylpropanesulfonic acid, PEG600, and dimethylolpropionic acid to intermediate material A in sequence, and stir at 65°C for 20 minutes to obtain intermediate material B. Add deionized water to intermediate material B, add triethylamine to adjust the pH to 8, stir at 1500 r / min for 35 minutes, and cool to room temperature to obtain modified polyurethane emulsion. Impregnate cotton fibers and polyester fibers in the modified polyurethane emulsion for 25 minutes, and dry at 40°C for 50 minutes to obtain treated cotton fibers and polyester fibers for later use.

[0048] The mass ratio of isophorone diisocyanate, polycaprolactone diol, and dibutyltin dilaurate is 7:9:1; the amount of 2-acrylamido-2-methylpropanesulfonic acid added is 2.5% of the mass of intermediate material A; the amount of PEG600 added is 5% of the mass of intermediate material A; the amount of dimethylolpropionic acid added is 8% of the mass of intermediate material A; and the amount of deionized water added is 4 times the mass of intermediate material B.

[0049] S2. Take the treated cotton fiber and polyester fiber at a mass ratio of 4:6, prepare lightweight yarn by Siro compact spinning, and weave it in plain weave to obtain lightweight base fabric.

[0050] S3. Mix choline chloride and oxalic acid, and stir at 70°C until a uniform and clear liquid is formed, which is the eutectic solvent. Add microcrystalline cellulose to the eutectic solvent, stir at 90°C for 6 hours, dialyze, and then disperse by ultrasonication. Centrifuge and collect the supernatant to obtain mixture A. Dissolve chitosan in dilute acetic acid solution to obtain chitosan solution. Mix the nanocellulose suspension with the chitosan solution to obtain mixture B. Add epichlorohydrin to mixture B and stir until uniform to obtain the finishing solution.

[0051] The mass ratio of choline chloride to oxalic acid is 3:1.5; the amount of microcrystalline cellulose added is 1 wt% of the eutectic solvent; the mass concentration of the dilute acetic acid solution is 2%; the ratio of chitosan to dilute acetic acid solution is 1 g:110 mL; the mass ratio of mixture A to chitosan solution is 5:1; and the amount of epichlorohydrin added is 3% of mixture B.

[0052] S4. Soak the thin base fabric in the finishing solution at a bath ratio of 1g:45mL for 60 minutes, take it out, lay it flat on the roller of the rolling mill, and roll it with the liquid. The residual rate is 65%. Take out the fabric and dry it at 110℃ for 2 hours to obtain the thin embroidered fabric.

[0053] Comparative Example 1

[0054] Compared with Example 1, the difference is that in step S1 of Comparative Example 1, the cotton fibers and polyester fibers are not impregnated in the modified polyurethane emulsion, while the other operation steps and parameters remain unchanged.

[0055] Comparative Example 2

[0056] Compared with Example 1, the difference is that 2-acrylamido-2-methylpropanesulfonic acid is not added in step S1 of Comparative Example 2, while the other operation steps and parameters remain unchanged.

[0057] Comparative Example 3

[0058] Compared with Example 1, the difference is that PEG600 is not added in step S1 of Comparative Example 3, while the other operation steps and parameters remain unchanged.

[0059] Comparative Example 4

[0060] Compared with Example 1, the difference is that microcrystalline cellulose is not added in step S3 of Comparative Example 4, while the other operation steps and parameters remain unchanged.

[0061] Comparative Example 5

[0062] Compared with Example 1, the difference is that chitosan solution is not added in step S3 of Comparative Example 5, while the other operation steps and parameters remain unchanged.

[0063] Test Example 1

[0064] The tensile properties of the lightweight fabrics prepared in Examples 1-3 and Comparative Examples 1 and 4 were tested in accordance with the standard GB / T 3923.1-2013 "Textiles - Tensile Properties of Fabrics - Part 1: Determination of Breaking Strength and Elongation at Break"; the results are shown in Table 1.

[0065] Table 1

[0066] Breaking strength (N) Elongation at break (%) Example 1 2 16.02 28.24 Example 2 2 11.15 27.96 Example 3 2 10.49 27.89 Comparative Example 1 1 65.95 32.04 Comparative Example 4 1 73.94 35.18 surface

[0067] As can be seen from Table 1, the lightweight embroidered fabric prepared by the method of the present invention is not easily deformed, broken or damaged during the embroidery process, which greatly improves the tensile strength of the lightweight embroidered fabric. Specifically, as can be seen from Comparative Example 1, the present invention impregnates cotton fibers and polyester fibers in modified polyurethane emulsion, and the polyurethane film condensed on the fiber surface can resist the tensile stress caused by repeated piercing of embroidery threads. As can be seen from Comparative Example 4, the introduction of microcrystalline cellulose with high crystallinity and rigidity into the fabric can improve the tensile strength, modulus and other mechanical properties of the lightweight embroidered fabric.

[0068] Test Example 2

[0069] Fabric surface wettability test: The lightweight fabrics prepared in Examples 1-3 and Comparative Examples 1-5 were placed on the platform of an optical contact angle measuring instrument. Deionized water was used as the test liquid, with a drop volume of 5 μL. The test temperature was 23±2℃ and the relative humidity was 50±5% RH. The contact angle of the deionized water was measured 5 seconds after the droplet contacted the fabric surface; the results are shown in Table 2.

[0070] Table 2

[0071] Deionized water contact angle (°): Example 1 26.2, Example 2 25.8, Example 3 25.5, Comparative Example 2 35.7, Comparative Example 3 36.6, Comparative Example 4 37.8, Comparative Example 5 36.9 surface

[0072] As can be seen from Table 2, the lightweight embroidered fabric prepared by the method of the present invention has high hydrophilicity. Specifically, as can be seen from Comparative Examples 2-3, the sulfonic acid groups and polyethylene glycol segments introduced into the modified polyurethane of the present invention can maintain the strong hydrophilicity of the polyurethane film condensed on the outside of the lightweight embroidered fabric. The polyethylene glycol segments have a good interaction with water molecules through ether oxygen bonds, which can promote the spreading and diffusion of droplets. As can be seen from Comparative Examples 4-5, the microcrystalline cellulose and chitosan introduced in the present invention can improve the hydrophilicity of the lightweight embroidered fabric.

[0073] Test Example 3

[0074] Referring to standard GB / T 23976.1-2009, the dye uptake rate (%) of the lightweight fabrics prepared in Examples 1-3 and Comparative Examples 1-5 under normal pressure was determined; the results are shown in Table 3.

[0075] Table 3

[0076] Coloring Rate (%) Example 1 87.3 Example 2 86.4 Example 3 85.9 Comparative Example 2 75.2 Comparative Example 3 71.7 Comparative Example 4 67.5 Comparative Example 5 70.8 surface

[0077] As shown in Table 2, the lightweight embroidered fabric prepared by the method of the present invention can enhance the adsorption of dye molecules in water during dyeing, thereby improving the dyeing rate, making the dyeing more uniform and the color more vibrant. Specifically, as can be seen from Comparative Examples 2-3, the hydrophilicity of the polyurethane film condensed on the outside of the lightweight embroidered fabric is improved, which can promote the dyeing rate during the dyeing process. As can be seen from Comparative Examples 4-5, the present invention adds microcrystalline cellulose and chitosan to the finishing solution. Both microcrystalline cellulose and chitosan contain a large number of hydrophilic groups such as hydroxyl groups. Introducing them into the lightweight embroidered fabric composite can form hydrophilic sites on or inside the lightweight embroidered fabric, thereby improving the dyeing rate.

[0078] In the description of this specification, the 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 present invention. In this specification, the 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.

[0079] The above description is merely an example and illustration of the concept of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the concept of the invention or exceed the scope defined in the claims, they should all fall within the protection scope of the present invention.

Claims

1. A method for preparing a lightweight embroidered fabric, characterized in that, The preparation method specifically includes the following steps: S1, mixing dried isophorone diisocyanate, polycaprolactone diol, and dibutyltin dilaurate, and stirring under controlled temperature once to obtain intermediate material A; adding 2-acrylamido-2-methylpropanesulfonic acid, polyethylene glycol, and dimethylolpropionic acid sequentially to intermediate material A, and stirring under controlled temperature a second time to obtain intermediate material B; adding deionized water, adjusting the pH, stirring at high speed, and cooling to obtain modified polyurethane emulsion; impregnating cotton fibers and polyester fibers in the modified polyurethane emulsion, and drying to obtain treated cotton fibers and polyester fibers for later use; S2, taking the treated cotton fibers and polyester fibers, and preparing them using Siro compact spinning. Lightweight yarns are woven in a plain weave to obtain a lightweight base fabric; S3, choline chloride and oxalic acid are mixed and stirred at a controlled temperature until a uniform and clear liquid is formed, which is the eutectic solvent; microcrystalline cellulose is added to the eutectic solvent, stirred at a controlled temperature a second time, dialyzed, ultrasonically dispersed, and the supernatant is collected by centrifugation to obtain mixture A; chitosan is dissolved in dilute acetic acid solution to obtain chitosan solution; mixture A is mixed with chitosan solution to obtain mixture B, epichlorohydrin is added to mixture B and stirred evenly to obtain finishing solution; S4, the lightweight base fabric is immersed in finishing solution according to the bath ratio, taken out, laid flat on the rollers of the rolling mill, rolled, the fabric is taken out, dried, and the lightweight embroidered fabric is obtained.

2. The method for preparing the lightweight embroidered fabric according to claim 1, characterized in that, The temperature for the first temperature-controlled stirring is 80-90℃, and the time is 2-3 hours; the temperature for the second temperature-controlled stirring is 60-70℃, and the time is 20-40 minutes; the pH adjustment is achieved by adding triethylamine to adjust the pH to 7.5-8.5; the high-speed stirring speed is 1500-1800 r / min, and the time is 30-40 minutes; the cooling is achieved by cooling to room temperature; the impregnation time is 20-30 minutes; and the drying temperature is 40-60℃, and the time is 50-60 minutes.

3. The method for preparing the lightweight embroidered fabric according to claim 1, characterized in that, The mass ratio of isophorone diisocyanate, polycaprolactone diol, and dibutyltin dilaurate is 5-7:8-10:1-2; the amount of 2-acrylamido-2-methylpropanesulfonic acid added is 2-3% of the mass of intermediate material A; the amount of polyethylene glycol added is 3-5% of the mass of intermediate material A; the amount of dimethylolpropionic acid added is 6-8% of the mass of intermediate material A; and the amount of deionized water added is 3-5 times the mass of intermediate material B.

4. The method for preparing the lightweight embroidered fabric according to claim 1, characterized in that, Step S2 specifically includes: taking the treated cotton fibers and polyester fibers, preparing lightweight yarns using Siro compact spinning, and weaving them in plain weave to obtain a lightweight base fabric.

5. The method for preparing the lightweight embroidered fabric according to claim 4, characterized in that, The mass ratio of the treated cotton fiber to polyester fiber is 2-4:5-7.

6. The method for preparing the lightweight embroidered fabric according to claim 1, characterized in that, The temperature for the first temperature-controlled stirring is 70-80℃; the temperature for the second temperature-controlled stirring is 85-95℃, and the time is 4-6 hours.

7. The method for preparing the lightweight embroidered fabric according to claim 1, characterized in that, The mass ratio of choline chloride to oxalic acid is 2-3:1-2; the amount of microcrystalline cellulose added is 1-3 wt% of the eutectic solvent; the mass concentration of the dilute acetic acid solution is 1-3%; the volume ratio of chitosan to dilute acetic acid solution is 1 g:100-120 mL; the mass ratio of mixture A to chitosan solution is 4-6:1-3; and the amount of epichlorohydrin added is 3-5% of the mass of mixture B.

8. The method for preparing the lightweight embroidered fabric according to claim 1, characterized in that, In step S4, the liquor ratio is 1g:40-50mL; the soaking time is 30-60min; the residual rate of the rolling liquid is 65-75%; and the drying temperature is 100-110℃ for 1-2h.