A non-iron wrinkle-resistant fabric and a method for preparing the same
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- GAOFAN (ZHEJIANG) INFORMATION TECH CO LTD
- Filing Date
- 2026-03-25
- Publication Date
- 2026-06-16
Smart Images
Figure REF-OBJ-1774419131248-000001 
Figure REF-OBJ-1774419131248-000002 
Figure REF-OBJ-1774419131248-000003
Abstract
Description
Technical Field
[0001] This invention relates to the field of fabric processing technology, specifically to a wrinkle-resistant, non-iron fabric and its preparation method. Background Technology
[0002] Ordinary natural fiber fabrics such as cotton and linen are prone to wrinkling, requiring ironing to maintain their smoothness, which significantly impacts convenience and usability. Wrinkle-resistant fabrics, as a core category of functional upgrades in textile materials, effectively reduce wrinkles during wearing, washing, and storage. They maintain garments' smoothness and crispness without frequent ironing, improving both comfort and appearance while saving time and costs on care, perfectly aligning with the public's pursuit of a convenient and high-quality lifestyle. Currently, with the textile industry's transformation towards high-end and functional products, and the continuous upgrading of consumption patterns, wrinkle-resistant fabrics have become an important direction for the functional and high-end development of textile materials.
[0003] To effectively address the core pain points of traditional fabrics—poor wrinkle resistance and inability to meet market demands—the industry currently widely adopts a processing technique involving padding the fabric with an anti-wrinkle finishing solution. This involves immersing the fabric in the solution and then padding it, allowing the finishing agent to adhere evenly to the fiber surface and penetrate into the fiber interior, thereby improving the fabric's wrinkle resistance and resilience to a certain extent. However, traditional anti-wrinkle finishing solutions are mostly single-component chemical finishing agents. While these agents can improve the wrinkle resistance of the fabric, they easily damage the structure and arrangement of the fabric fibers during processing, leading to a decrease in fabric durability. This includes problems such as yellowing under light conditions and reduced water repellency of the fabric surface. To address this issue, this invention provides a wrinkle-resistant, non-iron fabric and its preparation method. Summary of the Invention
[0004] The purpose of this invention is to provide a wrinkle-free, non-iron fabric and its preparation method in order to solve the above-mentioned problems.
[0005] The present invention achieves the above objectives through the following technical solutions: This invention provides a wrinkle-free and anti-wrinkle fabric, which is obtained by treating a base fabric with an anti-wrinkle finishing liquid; The anti-wrinkle finishing solution was prepared by compounding a modified urea solution with a 40% (w / w) aqueous solution of dihydroxymethyldihydroxyvinyl urea. The modified urea solution was prepared by compound modification of urea solution with dicyandiamide, amino-modified polydimethylsiloxane and persimmon extract.
[0006] As a further optimization of the present invention, the base fabric is made of cotton fiber and polyester fiber blended in a mass ratio of 1:(1-3).
[0007] As a further optimization of the present invention, the raw materials for preparing the anti-wrinkle finishing liquid, by weight, include 9-12 parts urea, 20-23 parts 40% (w / w) dihydroxymethyl dihydroxyethylene urea aqueous solution, 1-2 parts dicyandiamide, 2-3 parts amino-modified polydimethylsiloxane, 2-5 parts persimmon extract, and 45-50 parts deionized water.
[0008] As a further optimization of the present invention, the preparation method of persimmon extract is as follows: fresh green persimmons are crushed to obtain fruit pulp, which is then sterilized and succinic acid and Aspergillus niger liquid are added in sequence for fermentation to obtain fermentation product. After inactivating Aspergillus niger, the product is subjected to ultrasonic treatment, followed by filtration to remove impurities, adsorption to decolorize, and spray drying to obtain persimmon extract.
[0009] As a further optimization of the present invention, the amount of succinic acid added is 1-1.5% (v / v) based on the volume of fruit pulp, and the amount of Aspergillus niger liquid added is 3-6% (v / v).
[0010] As a further optimization of the present invention, the ultrasonic treatment conditions are as follows: ultrasonic treatment for 30-45 min at 30-45℃, 200-300W, and 25-40kHz.
[0011] As a further optimization of the present invention, the fermentation conditions are closed fermentation at 32-35℃ for 18-24 hours.
[0012] This invention also provides a method for preparing a wrinkle-resistant, non-iron fabric, comprising the following steps: (1) The cotton fiber was enzymatically hydrolyzed by cellulase, and after the enzyme was inactivated at high temperature, it was washed, centrifuged and dehydrated and then vacuum dried at low temperature. The treated cotton fiber was then blended with polyester fiber to obtain the basic fabric. (2) Preparation of persimmon extract: Add urea and dicyandiamide to deionized water and stir until completely dissolved. Then add amino-modified polydimethylsiloxane, disperse and emulsify evenly, add persimmon extract, stir evenly, and heat to 55-60℃ and keep warm for 1-2 hours to obtain modified urea solution. (3) Adjust the pH of the modified urea solution to 5.5. At 45-50℃, add half of the modified urea solution dropwise to a 40% (w / w) dihydroxymethyl dihydroxyethylene urea aqueous solution at a dropping rate of 20-30 mL / h. Adjust the pH to 4.5. Then add the other half of the modified urea solution dropwise at a dropping rate of 15-30 mL / h. Cool the solution to 45℃, adjust the pH of the system to 4.5, and stir for 30 min to obtain the anti-wrinkle finishing solution. (4) The base fabric is immersed in the anti-wrinkle finishing liquid for padding and then dried to obtain wrinkle-free anti-wrinkle fabric.
[0013] As a further optimization of the present invention, in step (1), the enzymatic hydrolysis method is as follows: prepare a cellulase impregnation solution with a mass concentration of 2-5 g / L using acidic cellulase preparation and acetate-sodium acetate buffer solution, and impregnate cotton fibers in the cellulase impregnation solution at a bath ratio of 1:(20-30) at 45-55℃, and treat at a constant temperature for 30-40 min.
[0014] As a further optimization of the present invention, in step (4), the immersion and rolling conditions are: three immersions and three rollings are performed at 45-55℃, the total immersion and rolling time is 12-18 min, and the rolling residue rate is 65-75%; the drying conditions are: pre-drying at 80-100℃ for 3-5 min, and then baking at 150-170℃ for 1-3 min.
[0015] The beneficial effects of this invention are as follows: The wrinkle-resistant fabric provided by this invention utilizes enzymatic modification of cotton fibers and padding treatment with an anti-wrinkle finishing solution during its preparation process, resulting in a significant improvement in the fabric's wrinkle resistance. The anti-wrinkle finishing solution containing persimmon extract not only enhances the fabric's wrinkle resistance but also effectively improves its surface water repellency and resistance to light yellowing. This preparation method balances the fabric's functionality and durability, meeting diverse fabric requirements. Detailed Implementation
[0016] The present application will now be described in further detail. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.
[0017] I. Experimental Materials (1) The amino-modified polydimethylsiloxane is specifically γ-aminopropylmethyldimethoxysilane-modified polydimethylsiloxane, which was purchased from Zhejiang Xin'an Chemical Group; (2) Preparation of Aspergillus niger suspension: Aspergillus niger was inoculated onto PDA medium and cultured at 30°C for 72 h. The spores were washed away with sterile physiological saline, and the concentration of the spore suspension was adjusted to 1×10⁻⁶ using the plate counting method. 8 CFU / mL; (3) The concentration of succinic acid is 0.5% (w / v), which is prepared by dissolving commercially available succinic acid monohydrate in deionized water; (4) pH adjuster: the acid adjuster is a 10% (w / w) aqueous acetic acid solution, and the alkaline adjuster is a 5% (w / w) aqueous sodium carbonate solution; (5) The composite adsorbent consists of activated carbon and diatomaceous earth in a mass ratio of 1:2; Unless otherwise specified, all methods used in this invention are conventional methods known to those skilled in the art, and all reagents and materials used are commercially available products.
[0018] II. Experimental Methods 1. Preparation of wrinkle-free and anti-wrinkle fabrics Example 1
[0019] A wrinkle-resistant, non-iron fabric is prepared through the following steps: (1) Prepare a cellulase impregnation solution with a mass concentration of 2 g / L using acidic cellulase preparation (10000 U / g, the same below) and acetate-sodium acetate buffer solution. At 45°C, impregnate cotton fibers in the cellulase impregnation solution at a bath ratio of 1:20, and treat at a constant temperature for 40 min to inactivate the enzyme (keep warm at 95°C for 10 min, the same below). After washing, centrifuge to dehydrate, and then perform low-temperature vacuum drying (40°C, 0.08 MPa, 60 min, the same below). Blend the treated cotton fibers with polyester fibers at a mass ratio of 1:1 to obtain the base fabric. (2) Fresh green persimmons were crushed to obtain fruit pulp. After sterilization (65℃, 20min, the same below), 1% succinic acid and 3% Aspergillus niger solution were added based on the volume of fruit pulp. The mixture was placed at 32℃ and fermented in a sealed container for 24h to obtain fermentation product. After inactivating Aspergillus niger (heated at 85℃ for 5min, the same below), ultrasonic treatment was performed (ultrasonic treatment at 30℃, 200W, 25kHz for 45min). Then, the mixture was filtered to remove impurities, adsorbed and decolorized (1% of the mass of the filtrate was added, 35℃, 200r / min, 30min, the same below) and spray dried (inlet air temperature 160℃, outlet air temperature 80℃, feed rate 15mL / min, the same below) to obtain persimmon extract. (3) By weight, take 9 parts urea, 20 parts 40% (w / w) dihydroxymethyl dihydroxyethylene urea aqueous solution, 1 part dicyandiamide, 2 parts amino-modified polydimethylsiloxane, 2 parts persimmon extract, and 50 parts deionized water. Urea and dicyandiamide were added to deionized water and stirred until completely dissolved. Then amino-modified polydimethylsiloxane was added and dispersed and emulsified evenly (1000 r / min, 15 min, the same below). Persimmon extract was added and stirred evenly (800 r / min, 10 min, the same below). The temperature was raised to 55℃ and kept at that temperature for 2 h to obtain a modified urea solution. (4) Adjust the pH of the modified urea solution to 5.5. At 45°C, add half of the modified urea solution dropwise to a 40% (w / w) dihydroxymethyl dihydroxyethylene urea aqueous solution at a dropping rate of 20 mL / h. Adjust the pH to 4.5. Then add the other half of the modified urea solution dropwise at a dropping rate of 15 mL / h. Cool the solution to 45°C, adjust the pH of the system to 4.5, and stir for 30 min to obtain the anti-wrinkle finishing solution. (5) At 55°C, the base fabric is immersed in the anti-wrinkle finishing liquid for three dips and three slits. The total dip and slit time is 12 min and the slit rate is 75%. The fabric after dip and slit treatment is pre-dried at 80°C for 5 min and then baked at 170°C for 1 min to obtain wrinkle-free anti-wrinkle fabric. Example 2
[0020] A wrinkle-resistant, non-iron fabric is prepared through the following steps: (1) Prepare a cellulase impregnation solution with a mass concentration of 5 g / L using acidic cellulase preparation and acetate-sodium acetate buffer solution. At 55°C, impregnate cotton fibers in the cellulase impregnation solution at a bath ratio of 1:30. Treat at a constant temperature for 30 min, inactivate enzyme, wash, centrifuge and dehydrate, and then perform low-temperature vacuum drying. Blend the treated cotton fibers with polyester fibers at a mass ratio of 1:3 to obtain the base fabric. (2) Fresh green persimmons were crushed to obtain fruit pulp. After sterilization, 1.5% succinic acid and 6% Aspergillus niger solution were added by volume of the fruit pulp. The mixture was placed in a sealed fermentation at 35°C for 18 hours to obtain the fermentation product. After inactivating Aspergillus niger, the product was subjected to ultrasonic treatment (ultrasonic treatment at 45°C, 300W, and 40kHz for 30 minutes). Then, the product was subjected to filtration to remove impurities, adsorption to decolorize, and spray drying to obtain persimmon extract. (3) By weight, take 12 parts urea, 23 parts 40% (w / w) dihydroxymethyl dihydroxyethylene urea aqueous solution, 2 parts dicyandiamide, 3 parts amino-modified polydimethylsiloxane, 5 parts persimmon extract, and 45 parts deionized water. Urea and dicyandiamide were added to deionized water and stirred until completely dissolved. Then, amino-modified polydimethylsiloxane was added, and after dispersion and emulsification, persimmon extract was added. After stirring evenly, the temperature was raised to 60°C and kept at that temperature for 1 hour to obtain a modified urea solution. (4) Adjust the pH of the modified urea solution to 5.5. At 50°C, add half of the modified urea solution dropwise to a 40% (w / w) dihydroxymethyl dihydroxyethylene urea aqueous solution at a dropping rate of 30 mL / h. Adjust the pH to 4.5. Then add the other half of the modified urea solution dropwise at a dropping rate of 30 mL / h. Cool the solution to 45°C, adjust the pH of the system to 4.5, and stir for 30 min to obtain the anti-wrinkle finishing solution. (5) At 45°C, the base fabric is immersed in the anti-wrinkle finishing liquid for three dips and three slits. The total dip and slit time is 18 min and the slit rate is 65%. The fabric after dip and slit is pre-dried at 100°C for 3 min and then baked at 150°C for 3 min to obtain wrinkle-free anti-wrinkle fabric. Example 3
[0021] A wrinkle-resistant, non-iron fabric is prepared through the following steps: (1) Prepare a cellulase impregnation solution with a mass concentration of 3 g / L using acidic cellulase preparation and acetate-sodium acetate buffer solution. At 50°C, impregnate cotton fibers in the cellulase impregnation solution at a bath ratio of 1:25. Treat at a constant temperature for 35 min, inactivate enzyme, wash, centrifuge and dehydrate, and then perform low-temperature vacuum drying. Blend the treated cotton fibers with polyester fibers at a mass ratio of 1:2 to obtain the basic fabric. (2) Fresh green persimmons were crushed to obtain fruit pulp. After low-temperature sterilization, 1.2% succinic acid and 4% Aspergillus niger solution were added by volume of fruit pulp. The mixture was placed in a sealed fermentation at 34℃ for 20h to obtain fermentation product. After low-temperature inactivation of Aspergillus niger, the product was subjected to ultrasonic treatment (ultrasonic treatment at 40℃, 250W, 30kHz for 40min). Then, the product was subjected to filtration to remove impurities, adsorption to decolorize, and spray drying to obtain persimmon extract. (3) By weight, take 10 parts urea, 22 parts 40% (w / w) dihydroxymethyl dihydroxyethylene urea aqueous solution, 1.5 parts dicyandiamide, 2.5 parts amino-modified polydimethylsiloxane, 4 parts persimmon extract, and 48 parts deionized water. Urea and dicyandiamide were added to deionized water and stirred until completely dissolved. Then, amino-modified polydimethylsiloxane was added, and after dispersion and emulsification, persimmon extract was added. After stirring evenly, the temperature was raised to 58°C and kept at that temperature for 1.5 hours to obtain a modified urea solution. (4) Adjust the pH of the modified urea solution to 5.5. At 47°C, add half of the modified urea solution dropwise to a 40% (w / w) dihydroxymethyl dihydroxyethylene urea aqueous solution at a dropping rate of 25 mL / h. Adjust the pH to 4.5. Then add the other half of the modified urea solution dropwise at a dropping rate of 20 mL / h. Cool the solution to 45°C, adjust the pH of the system to 4.5, and stir for 30 min to obtain the anti-wrinkle finishing solution. (5) At 50°C, the base fabric is immersed in the anti-wrinkle finishing liquid for three dips and three slits. The total dip and slit time is 15 min and the slit rate is 70%. The fabric after dip and slit treatment is pre-dried at 90°C for 4 min and then baked at 160°C for 2 min to obtain wrinkle-free anti-wrinkle fabric.
[0022] 2. Performance testing of wrinkle-resistant and non-iron fabrics Samples of equal size were cut from the fabrics obtained in Examples 1-3, and an untreated base fabric (same as in Example 3) was used as a blank control for performance testing. The testing items and methods are as follows: (1) Wrinkle resistance test: Refer to GB / T 3819-1997 "Determination of the recovery of creases of textile fabrics by recovery angle method", fold the sample after standard atmospheric equilibrium and press to form a crease. After release, measure the opening angle of the two folds at the crease, record the warp and weft values and use the sum of the two to characterize the overall wrinkle resistance.
[0023] (2) Water repellency test: According to GB / T 42694-2023 "Detection and evaluation of the anti-wetting properties of textile surfaces by contact angle and roll-off angle method", after the sample is conditioned to humidity equilibrium under standard atmospheric conditions, it is flat and fixed on the test platform. 0.05mL of deionized water droplet is added to the surface of the sample. After standing for 30 seconds, the water contact angle is measured. The same sample is tested in parallel 5 times, and the arithmetic mean is taken as the final test result.
[0024] (3) Test for resistance to light yellowing: Refer to GB / T 8427-2019 "Textiles - Tests for color fastness to artificial light: Xenon arc", the sample was tested under a xenon lamp [420nm, 0.5W / (m 2 After continuous illumination for 8 hours (nm), the yellowness index (YI) was measured and recorded using a colorimeter. The same sample was tested in parallel 5 times, and the arithmetic mean was taken as the final test result.
[0025] The test results are shown in Table 1. It can be seen from the table that the data of Examples 1-3 are significantly better than the blank control. This result shows that the fabric prepared based on the preparation method provided by the present invention not only has good wrinkle resistance, but also good surface water repellency and light yellowing resistance.
[0026] Table 1. Fabric performance test results for Examples 1-3 and the blank control. 3. The influence of preparation method on fabric properties Adjust the preparation method of wrinkle-free and anti-wrinkle fabrics and set the following comparative examples: Comparative Example 1 A wrinkle-resistant, non-iron fabric is prepared through the following steps: (1) Prepare a cellulase impregnation solution with a mass concentration of 3 g / L using acidic cellulase preparation and acetate-sodium acetate buffer solution. At 50°C, impregnate cotton fibers in the cellulase impregnation solution at a bath ratio of 1:25. Treat at a constant temperature for 35 min, inactivate enzyme, wash, centrifuge and dehydrate, and then perform low-temperature vacuum drying. Blend the treated cotton fibers with polyester fibers at a mass ratio of 1:2 to obtain the basic fabric. (2) Add urea and dicyandiamide to deionized water and stir until completely dissolved. Then add amino-modified polydimethylsiloxane, disperse and emulsify evenly, and heat to 58°C and keep warm for 1.5 hours to obtain modified urea solution. (3) Adjust the pH of the modified urea solution to 5.5. At 47°C, add half of the modified urea solution dropwise to a 40% (w / w) dihydroxymethyl dihydroxyethylene urea aqueous solution at a dropping rate of 25 mL / h. Adjust the pH to 4.5. Then add the other half of the modified urea solution dropwise at a dropping rate of 20 mL / h. Cool the solution to 45°C, adjust the pH of the system to 4.5, and stir for 30 min to obtain the anti-wrinkle finishing solution. (4) At 50°C, the base fabric is immersed in the anti-wrinkle finishing liquid for three dips and three slits. The total dip and slit time is 15 min and the slit rate is 70%. The dipped and slit fabric is pre-dried at 90°C for 4 min and then baked at 160°C for 2 min to obtain wrinkle-free anti-wrinkle fabric.
[0027] Comparative Example 2 A wrinkle-resistant, non-iron fabric is prepared through the following steps: (1) The basic fabric is obtained by blending cotton fiber and polyester fiber at a mass ratio of 1:2; (2) Add urea and dicyandiamide to deionized water and stir until completely dissolved. Then add amino-modified polydimethylsiloxane, disperse and emulsify evenly, and heat to 58°C and keep warm for 1.5 hours to obtain modified urea solution. (3) Adjust the pH of the modified urea solution to 5.5. At 47°C, add half of the modified urea solution dropwise to a 40% (w / w) dihydroxymethyl dihydroxyethylene urea aqueous solution at a dropping rate of 25 mL / h. Adjust the pH to 4.5. Then add the other half of the modified urea solution dropwise at a dropping rate of 20 mL / h. Cool the solution to 45°C, adjust the pH of the system to 4.5, and stir for 30 min to obtain the anti-wrinkle finishing solution. (4) At 50°C, the base fabric is immersed in the anti-wrinkle finishing liquid for three dips and three slits. The total dip and slit time is 15 min and the slit rate is 70%. The dipped and slit fabric is pre-dried at 90°C for 4 min and then baked at 160°C for 2 min to obtain wrinkle-free anti-wrinkle fabric.
[0028] The performance of the wrinkle-resistant fabrics prepared in Comparative Examples 1 and 2 was tested. The test items and methods were the same as in Section 2, and the test results are shown in Table 2.
[0029] As can be seen from the table: the anti-wrinkle finishing solution used in Comparative Example 1 did not contain persimmon extract; Comparative Example 2, based on Comparative Example 1, further omitted the enzymatic hydrolysis step of cotton fiber treatment; there were significant differences in the wrinkle recovery angle of the fabric between Comparative Example 1 and Examples 3 and 2. This result indicates that enzymatic hydrolysis of cotton fibers and padding the fabric with an anti-wrinkle finishing solution containing persimmon extract are both beneficial to improving the anti-wrinkle performance of the fabric. In addition, compared with Example 3, the water contact angle of the fabric surface in Comparative Example 1 was significantly reduced, while the yellowing index was significantly increased. This result indicates that the persimmon extract in the anti-wrinkle finishing solution is the core component for improving the fabric's resistance to light yellowing and water repellency.
[0030] Table 2. Fabric performance test results for Comparative Examples 1 and 2 4. The effect of persimmon extract on fabric properties The preparation method of persimmon extract was adjusted, and the following comparative ratio was set up: Comparative Example 3 Compared to Example 3, the difference in Comparative Example 3 is that the preparation method of persimmon extract in step (2) is adjusted as follows: fresh green persimmons are crushed to obtain fruit pulp, sterilized and then subjected to ultrasonic treatment (ultrasonic treatment for 40 min at 40℃, 250W, 30kHz), and then filtered to remove impurities, adsorbed to decolorize and spray dried in sequence to obtain persimmon extract.
[0031] Comparative Example 4 Compared to Example 3, the difference in Comparative Example 4 is that the preparation method of persimmon extract in step (2) is adjusted as follows: fresh green persimmons are crushed to obtain fruit pulp. After sterilization, 4% Aspergillus niger solution is added based on the volume of the fruit pulp. The mixture is then placed in a sealed container at 34°C for 20 hours to obtain the fermentation product. After inactivating Aspergillus niger, the product is subjected to ultrasonic treatment (ultrasonic treatment at 40°C, 250W, and 30kHz for 40 minutes). The product is then subjected to filtration to remove impurities, adsorption to decolorize, and spray drying to obtain persimmon extract.
[0032] The performance of the wrinkle-free fabrics obtained in Comparative Examples 3 and 4 was tested. The test items and methods were the same as in Section 2, and the test results are shown in Table 3.
[0033] As can be seen from the table, compared with Example 3, the properties of the fabric in Comparative Example 3 are relatively worse. This result indicates that the persimmon extract preparation process used in this invention promotes the dissolution of effective components in persimmon, which in turn helps to improve the efficacy of the anti-wrinkle finishing liquid. In Comparative Example 4, the decrease in water contact angle is particularly significant. This result indicates that the use of succinic acid is a necessary material for preparing persimmon extract, which helps to enhance the effect of the anti-wrinkle finishing liquid on the water repellency of the fabric.
[0034] Table 3. Fabric performance test results for Comparative Examples 3 and 4 The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.
Claims
1. A wrinkle-resistant, non-iron fabric, characterized in that: The wrinkle-free and non-wrinkle-resistant fabric is obtained by treating a base fabric with an anti-wrinkle finishing liquid. The anti-wrinkle finishing solution is prepared by compounding a modified urea solution with a 40% (w / w) aqueous solution of dihydroxymethyldihydroxyvinyl urea. The modified urea solution is prepared by compound modification of urea solution with dicyandiamide, amino-modified polydimethylsiloxane and persimmon extract.
2. The wrinkle-resistant fabric according to claim 1, characterized in that: The base fabric is made of cotton fiber and polyester fiber blended in a mass ratio of 1:(1-3).
3. The wrinkle-resistant fabric according to claim 1, characterized in that: The raw materials for preparing the anti-wrinkle finishing liquid, by weight, include 9-12 parts urea, 20-23 parts 40% (w / w) dihydroxymethyl dihydroxyethylene urea aqueous solution, 1-2 parts dicyandiamide, 2-3 parts amino-modified polydimethylsiloxane, 2-5 parts persimmon extract, and 45-50 parts deionized water.
4. The wrinkle-resistant fabric according to claim 1, characterized in that: The preparation method of the persimmon extract is as follows: fresh green persimmons are crushed to obtain fruit pulp, which is then sterilized and succinic acid and Aspergillus niger liquid are added in sequence for fermentation to obtain fermentation products. After inactivating Aspergillus niger, the products are subjected to ultrasonic treatment, followed by filtration to remove impurities, adsorption to decolorize, and spray drying to obtain persimmon extract.
5. The wrinkle-resistant fabric according to claim 4, characterized in that: The amount of succinic acid added is 1-1.5% (v / v) based on the volume of the fruit pulp, and the amount of Aspergillus niger solution added is 3-6% (v / v).
6. The wrinkle-resistant fabric according to claim 4, characterized in that: The ultrasonic treatment conditions are: ultrasonic treatment for 30-45 min at 30-45℃, 200-300W, and 25-40kHz.
7. The wrinkle-resistant fabric according to claim 4, characterized in that: The fermentation conditions are: closed fermentation at 32-35℃ for 18-24 hours.
8. A method for preparing a wrinkle-free and non-iron fabric as described in any one of claims 1-7, characterized in that: Includes the following steps: (1) The cotton fiber was enzymatically hydrolyzed by cellulase, and after the enzyme was inactivated at high temperature, it was washed, centrifuged and dehydrated and then vacuum dried at low temperature. The treated cotton fiber was then blended with polyester fiber to obtain the basic fabric. (2) Preparation of persimmon extract: Add urea and dicyandiamide to deionized water and stir until completely dissolved. Then add amino-modified polydimethylsiloxane, disperse and emulsify evenly, add persimmon extract, stir evenly, and heat to 55-60℃ and keep warm for 1-2 hours to obtain modified urea solution. (3) Adjust the pH of the modified urea solution to 5.
5. At 45-50℃, add half of the modified urea solution dropwise to a 40% (w / w) dihydroxymethyl dihydroxyethylene urea aqueous solution at a dropping rate of 20-30 mL / h. Adjust the pH to 4.
5. Then add the other half of the modified urea solution dropwise at a dropping rate of 15-30 mL / h. Cool the solution to 45℃, adjust the pH of the system to 4.5, and stir for 30 min to obtain the anti-wrinkle finishing solution. (4) The base fabric is immersed in the anti-wrinkle finishing liquid for padding and then dried to obtain wrinkle-free anti-wrinkle fabric.
9. The preparation method according to claim 8, characterized in that: In step (1), the enzymatic hydrolysis method is as follows: prepare a cellulase impregnation solution with a mass concentration of 2–5 g / L using acidic cellulase preparation and acetate-sodium acetate buffer solution, and impregnate cotton fibers in the cellulase impregnation solution at a bath ratio of 1:(20-30) at 45–55℃ for constant temperature treatment for 30–40 min.
10. The preparation method according to claim 8, characterized in that: In step (4), the immersion and rolling conditions are as follows: three immersions and three rollings are performed at 45-55℃, the total immersion and rolling time is 12-18 min, and the rolling residue rate is 65-75%; the drying conditions are as follows: pre-drying at 80-100℃ for 3-5 min, and then baking at 150-170℃ for 1-3 min.