Antistatic finishing method for worsted cashmere fabric
By combining low-temperature plasma surface modification and antistatic finishing liquid treatment, the problem of static electricity accumulation in worsted cashmere fabrics was solved, and the antistatic properties, wrinkle resistance, and light yellowing resistance were improved, thus achieving an overall performance improvement of the fabric.
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
- 2026-05-15
AI Technical Summary
Existing worsted cashmere fabrics are prone to static electricity buildup during processing, wearing, and storage, which affects the wearing experience and easily attracts dust. At the same time, antistatic finishing can damage the fabric's wrinkle resistance and lightfastness.
A method combining low-temperature plasma surface modification with an antistatic finishing liquid was adopted. The method involves using a mixture of argon and hexamethyldisiloxane vapor for low-temperature plasma treatment, and then preparing an antistatic finishing liquid containing hydrolyzed soybean protein, glycerol, persimmon extract, itaconic acid, and other ingredients for padding treatment.
It significantly improves the antistatic properties of worsted cashmere fabrics, enhances the fabric's wrinkle resistance and resistance to light yellowing, and comprehensively improves the fabric's functionality, durability, and aesthetics.
Smart Images
Figure REF-OBJ-1774420894401-000001
Abstract
Description
Technical Field
[0001] This invention relates to the field of fabric processing technology, specifically to a method for antistatic finishing of worsted cashmere fabric. Background Technology
[0002] Worsted cashmere fabric is characterized by its softness, skin-friendliness, excellent warmth, and delicate texture, making it widely used in the production of high-end textiles. However, cashmere fibers are natural protein fibers, lacking conductive groups in their molecular structure and exhibiting high surface resistivity. During processing, wearing, and storage, static electricity easily accumulates due to contact or friction. This static buildup not only affects the wearing experience but also causes the fabric to readily attract dust.
[0003] Currently, antistatic finishing methods for worsted cashmere fabrics include antistatic solution padding, physical modification, and blending with conductive or highly absorbent fibers. While traditional antistatic solutions can effectively improve the antistatic properties of worsted cashmere fabrics, they also lubricate the fibers and reduce inter-fiber friction, thus impairing the fabric's wrinkle resistance. Furthermore, the antistatic agent's action on cashmere proteins reduces the fabric's lightfastness, making it prone to yellowing under light exposure, thus reducing its durability and the aesthetic appeal of light-colored worsted cashmere. To address these issues, this invention provides an antistatic finishing method for worsted cashmere fabrics. Summary of the Invention
[0004] The purpose of this invention is to provide an antistatic finishing method for worsted cashmere fabrics 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 method for antistatic finishing of worsted cashmere fabric, specifically including the following steps: (1) After cleaning the fabric, dry it and adjust the moisture content of the fabric to 10-14%. Then, brush the fabric, wash it, and dry it again. (2) The fabric is conditioned to a moisture regain of 8-12%, and the fabric is subjected to low-temperature plasma surface modification treatment using a mixture of argon-hexamethyldisiloxane vapor with a volume ratio of 4:1. (3) An antistatic finishing solution was prepared using hydrolyzed soybean protein, glycerol, hydrogenated castor oil, persimmon extract, itaconic acid, butanetetracarboxylic acid, nonionic surfactant, sodium hypophosphite and deionized water as raw materials. (4) Adjust the pH value of the antistatic finishing solution to 6-6.5, use the antistatic finishing solution to impregnate the fabric, and obtain the finished fabric after drying and shaping.
[0006] As a further optimization of the present invention, in step (2), the process parameters of the low-temperature plasma surface modification treatment are: vacuum degree 20-40Pa, discharge power 80-120W, treatment time 30-60s, pulse discharge frequency 10-20kHz, and duty cycle 30-60%.
[0007] As a further optimization of the present invention, the antistatic finishing solution comprises, by weight, 3-5 parts hydrolyzed soybean protein, 4-6 parts glycerol, 1-2 parts hydrogenated castor oil, 2-3 parts persimmon extract, 1-2 parts itaconic acid, 2-4 parts butanetetracarboxylic acid, 0.5-1 part sodium hypophosphite, 0.5-1 part nonionic surfactant, and 70-80 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] As a further optimization of the present invention, the preparation method of the antistatic finishing solution is as follows: under the conditions of 45-55℃ and 200-300r / min, hydrolyzed soybean protein and glycerol are added to deionized water in sequence and stirred until completely dissolved. Hydrogenated castor oil, persimmon extract and nonionic surfactant are added, the temperature is raised to 60-70℃ and stirred until the system is uniform. Sodium hypophosphite is added and stirred until completely dissolved. Itaconic acid is added, stirred evenly and cooled to room temperature to obtain the antistatic finishing solution.
[0013] As a further optimization of the present invention, in step (4), the fabric is subjected to two dips and two nips treatments with an antistatic finishing liquid at room temperature. The dip and nips treatment time is 10-15s, the dip and nips treatment time is 8-12s, and the nips treatment rate is 65-75%.
[0014] As a further optimization of the present invention, in step (4), the drying process parameters are: pre-drying at 100-110℃ for 3-5 minutes, and then shaping at 110-120℃ for 0.5-1.5 minutes.
[0015] The beneficial effects of this invention are as follows: The antistatic finishing method for worsted cashmere fabric provided by this invention combines low-temperature plasma surface modification and antistatic finishing liquid padding. During low-temperature plasma surface modification, an argon-hexamethyldisiloxane vapor mixture is used, effectively improving the antistatic properties of the worsted cashmere fabric. The antistatic finishing liquid, containing itaconic acid, butanetetracarboxylic acid, and persimmon extract, is used to pad the fabric, further enhancing its antistatic properties. Furthermore, through the composite crosslinking effect of itaconic acid and butanetetracarboxylic acid, combined with the synergistic effect of persimmon extract, the fabric's wrinkle resistance and resistance to light yellowing are improved. This comprehensively enhances the functionality, durability, and aesthetics of the worsted cashmere fabric. 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) 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 10 using the plate counting method. 8 CFU / mL; (2) The concentration of succinic acid is 0.5% (w / v), which is prepared by dissolving commercially available succinic acid monohydrate in deionized water.
[0018] (3) The pH adjuster is a 5% (w / w) sodium hydroxide solution.
[0019] (4) The nonionic surfactant is OP-10.
[0020] (5) The composite adsorbent consists of activated carbon and diatomaceous earth in a mass ratio of 1:2.
[0021] 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.
[0022] II. Experimental Methods 1. Fabric preparation Selected yarn count 26S / 2, 180g / m 2 A 100% worsted cashmere plain weave fabric in off-white color, without dyeing or any functional finishing, was used as the experimental fabric (i.e., as the raw fabric) for comparative experiments. The specific setup was as follows: Example 1
[0023] A method for antistatic finishing of worsted cashmere fabric, specifically including the following steps: (1) After cleaning the fabric, dry it (80℃, 7min, the same below), adjust the moisture content of the fabric to 10%, perform a napping treatment on the fabric, wash it and dry it again (75℃, 5min, the same below). The sanding process parameters are as follows (the same applies below): sanding roller mesh number 600 mesh, cloth speed 12m / min, sanding roller linear speed 800m / min, sanding roller pressure 0.2MPa, single-sided sanding 2 passes; (2) The fabric was conditioned to a moisture regain of 8%, and a low-temperature plasma surface modification treatment was performed on the fabric using an argon-hexamethyldisiloxane vapor mixture with a volume ratio of 4:1. The parameters were set as follows: vacuum degree 20Pa, discharge power 80W, treatment time 60s, pulse discharge frequency 20kHz, and duty cycle 30%. (3) 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. Aspergillus niger was inactivated (heated at 85℃ for 5min, the same below). Then, ultrasonic treatment was performed (ultrasonic treatment at 30℃, 200W, 25kHz for 45min). The mixture was then 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. By weight, take 3 parts hydrolyzed soy protein, 4 parts glycerol, 1 part hydrogenated castor oil, 2 parts persimmon extract, 1 part itaconic acid, 2 parts butanetetracarboxylic acid, 0.5 parts sodium hypophosphite, 0.5 parts nonionic surfactant, and 80 parts deionized water. At 45℃ and 300r / min, hydrolyzed soybean protein and glycerol were added to deionized water in sequence and stirred until completely dissolved. Hydrogenated castor oil, persimmon extract and nonionic surfactant were added. The temperature was raised to 60℃ and stirred until the system was homogeneous. Sodium hypophosphite was added and stirred until completely dissolved. Itaconic acid was added, stirred evenly and cooled to room temperature to obtain an antistatic finishing solution. (4) Adjust the pH of the antistatic finishing solution to 6. Under room temperature conditions, use the antistatic finishing solution to perform a two-dip and two-nip treatment on the fabric. The first dip and one nip immersion time is 15s, the second dip and two nip immersion time is 12s, and the nip rate is 75%. The fabric after padding is pre-dried at 100℃ for 5 minutes, and then set at 110℃ for 1.5 minutes to obtain the finished fabric. Example 2
[0024] A method for antistatic finishing of worsted cashmere fabric, specifically including the following steps: (1) After cleaning the fabric, dry it, adjust the moisture content of the fabric to 14%, perform a brushing treatment on the fabric, wash it and dry it again. (2) The fabric was conditioned to a moisture regain of 12%, and a low-temperature plasma surface modification treatment was performed on the fabric using an argon-hexamethyldisiloxane vapor mixture with a volume ratio of 4:1. The treatment conditions were set as follows: vacuum degree 40 Pa, discharge power 120 W, treatment time 30 s, pulse discharge frequency 10 kHz, and duty cycle 60%. (3) 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 fruit pulp. The mixture was placed in a sealed fermentation at 35°C for 18 hours to obtain 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. By weight, take 5 parts hydrolyzed soy protein, 6 parts glycerol, 2 parts hydrogenated castor oil, 3 parts persimmon extract, 2 parts itaconic acid, 4 parts butanetetracarboxylic acid, 1 part sodium hypophosphite, 1 part nonionic surfactant, and 70 parts deionized water. At 55℃ and 200r / min, hydrolyzed soy protein and glycerol were added to deionized water in sequence and stirred until completely dissolved. Hydrogenated castor oil, persimmon extract and nonionic surfactant were added. The temperature was raised to 70℃ and stirred until the system was homogeneous. Sodium hypophosphite was added and stirred until completely dissolved. Itaconic acid was added, stirred evenly and cooled to room temperature to obtain an antistatic finishing solution. (4) Adjust the pH of the antistatic finishing solution to 6.5. Under room temperature conditions, use the antistatic finishing solution to perform a two-dip and two-nip treatment on the fabric. The immersion time for the first dip and one nip is 15s, and the immersion time for the second dip and two nip is 8s. The nip rate is 65%. The fabric after padding is pre-dried at 110℃ for 5 minutes and then set at 120℃ for 0.5 minutes to obtain the finished fabric. Example 3
[0025] A method for antistatic finishing of worsted cashmere fabric, specifically including the following steps: (1) After cleaning the fabric, dry it, adjust the moisture content of the fabric to 12%, perform a brushing treatment on the fabric, wash it and dry it again. (2) The fabric was conditioned to a moisture regain of 10%, and the fabric was subjected to low-temperature plasma surface modification treatment using an argon-hexamethyldisiloxane vapor mixture with a volume ratio of 4:1. The treatment conditions were set as follows: vacuum degree 30 Pa, discharge power 100 W, treatment time 45 s, pulse discharge frequency 15 kHz, and duty cycle 40%. (3) Fresh green persimmons were crushed to obtain fruit pulp. After sterilization, 1.2% succinic acid and 4% Aspergillus niger solution were added by volume of the fruit pulp. The mixture was placed in a sealed fermentation at 34℃ for 20h to obtain the fermentation product. After inactivating Aspergillus niger, the product was subjected to ultrasonic treatment (ultrasonic treatment at 40℃, 250W, and 30kHz for 40min). Then, the product was subjected to filtration to remove impurities, adsorption to decolorize, and spray drying to obtain persimmon extract. By weight, take 4 parts hydrolyzed soy protein, 5 parts glycerin, 1.5 parts hydrogenated castor oil, 2.5 parts persimmon extract, 1.5 parts itaconic acid, 3 parts butanetetracarboxylic acid, 0.6 parts sodium hypophosphite, 0.8 parts nonionic surfactant, and 75 parts deionized water. At 50℃ and 250r / min, hydrolyzed soy protein and glycerol were added to deionized water in sequence and stirred until completely dissolved. Hydrogenated castor oil, persimmon extract and nonionic surfactant were added. The temperature was raised to 65℃ and stirred until the system was homogeneous. Sodium hypophosphite was added and stirred until completely dissolved. Itaconic acid was added, stirred evenly and cooled to room temperature to obtain an antistatic finishing solution. (4) Adjust the pH of the antistatic finishing solution to 6.2. Under room temperature conditions, use the antistatic finishing solution to perform a two-dip and two-nip treatment on the fabric. The first dip and one-nip immersion time is 12s, the second dip and two-nip immersion time is 10s, and the immersion rate is 70%. The fabric after padding is pre-dried at 105℃ for 4 minutes and then set at 115℃ for 1 minute to obtain the finished fabric.
[0026] Comparative Example 1 Compared to Example 3, Comparative Example 1 differs in that the mixed gas used in step (2) is replaced with an oxygen-nitrogen mixed gas with a volume ratio of 1:1.
[0027] Comparative Example 2 Compared to Example 3, the difference in Comparative Example 2 is that the formula of the antistatic finishing liquid in step (3) is adjusted as follows: by mass, take 4 parts hydrolyzed soybean protein, 5 parts glycerol, 1.5 parts hydrogenated castor oil, 1.5 parts itaconic acid, 3 parts butanetetracarboxylic acid, 0.6 parts sodium hypophosphite, 0.8 parts nonionic surfactant, and 75 parts deionized water.
[0028] Comparative Example 3 Compared to Example 3, the difference in Comparative Example 3 is that the formula of the antistatic finishing liquid in step (3) is adjusted as follows: by mass, take 4 parts hydrolyzed soybean protein, 5 parts glycerol, 1.5 parts hydrogenated castor oil, 2.5 parts persimmon extract, 4.5 parts butanetetracarboxylic acid, 0.6 parts sodium hypophosphite, 0.8 parts nonionic surfactant, and 75 parts deionized water.
[0029] Comparative Example 4 Compared with Example 3, the difference of Comparative Example 4 is that the preparation method of persimmon extract in step (3) 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.
[0030] 2. Fabric performance testing Samples of equal size were cut from the fabrics obtained in Examples 1-3 and Comparative Examples 1-4. Untreated worsted cashmere fabric was used as a blank control for performance testing. The test items and methods are as follows: (1) Antistatic performance test: Refer to GB / T 12703.1-2021 "Evaluation of electrostatic properties of textiles - Part 1: Corona charging method" to test the electrostatic voltage half-life of the sample; after the sample is conditioned to humidity equilibrium under standard atmospheric conditions, it is charged with -10kV corona for 30s at 20℃ and 40%RH. After the charging is stopped, the platform is kept rotating and the time required for the electrostatic voltage on the sample surface to decay to 50% of the initial peak value is automatically recorded, which is the electrostatic voltage half-life. Five samples are taken for each sample for parallel testing, and the average value is taken as the test result. According to the test results, the antistatic performance level of the sample is determined (excellent: half-life ≤ 10s; good: 10s < half-life ≤ 30s; average: 30s < half-life ≤ 60s; poor: > 60s). (2) Wrinkle resistance test: Refer to GB / T 3819-1997 "Determination of the recovery of creases of textile fabrics by the recovery angle method", fold the sample after standard atmospheric equilibrium and press it 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. (3) Test for resistance to light yellowing: Referring to GB / T 8427-2019 "Textiles - Tests for color fastness to artificial light: Xenon arc", the samples were 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.
[0031] The test results are shown in the table below. From the table, we can see that: (1) In Examples 1-3, all data of the fabric were significantly better than those of the blank control group. This result shows that the antistatic finishing method proposed in this invention can significantly improve the antistatic properties, wrinkle resistance and light yellowing resistance of worsted cashmere fabric. (2) Comparing Example 3, blank comparison and Comparative Example 1, it can be seen that padding with antistatic finishing liquid and low-temperature plasma surface modification with argon-hexamethyldisiloxane mixed gas can both improve the antistatic properties of cashmere fabric, and the modification effect achieved by argon-hexamethyldisiloxane mixed gas is significantly better than that of conventional oxygen-nitrogen mixed gas. (3) Comparing Example 3, Comparative Example 2 and Comparative Example 4, it can be seen that the yellowness index of the fabric in Comparative Example 2 and Comparative Example 4 is significantly higher than that in Example 3. This result indicates that the persimmon extract obtained by fermenting green persimmon is the core functional component for improving the light yellowing resistance of fine cashmere fabric. (4) Comparing Example 3, Comparative Example 2 and Comparative Example 3, it can be seen that the wrinkle recovery angle of the fabric in Comparative Example 2 and Comparative Example 3 is significantly smaller than that in Example 3. This result indicates that the effect of improving the wrinkle resistance of worsted cashmere fabric depends on the composite crosslinking system composed of itaconic acid and butanetetracarboxylic acid and the use of persimmon extract.
[0032] 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 method for antistatic finishing of worsted cashmere fabric, characterized in that: Specifically, the following steps are included: (1) After cleaning the fabric, dry it and adjust the moisture content of the fabric to 10-14%. Then, brush the fabric, wash it, and dry it again. (2) The fabric is conditioned to a moisture regain of 8-12%, and the fabric is subjected to low-temperature plasma surface modification treatment using a mixture of argon-hexamethyldisiloxane vapor with a volume ratio of 4:
1. (3) An antistatic finishing solution was prepared using hydrolyzed soybean protein, glycerol, hydrogenated castor oil, persimmon extract, itaconic acid, butanetetracarboxylic acid, nonionic surfactant, sodium hypophosphite and deionized water as raw materials. (4) Adjust the pH value of the antistatic finishing solution to 6-6.5, use the antistatic finishing solution to impregnate the fabric, and obtain the finished fabric after drying and shaping.
2. The antistatic finishing method according to claim 1, characterized in that: In step (2), the process parameters for low-temperature plasma surface modification treatment are: vacuum degree 20-40Pa, discharge power 80-120W, treatment time 30-60s, pulse discharge frequency 10-20kHz, and duty cycle 30-60%.
3. The antistatic finishing method according to claim 1, characterized in that: The antistatic finishing solution comprises, by weight, 3-5 parts hydrolyzed soybean protein, 4-6 parts glycerol, 1-2 parts hydrogenated castor oil, 2-3 parts persimmon extract, 1-2 parts itaconic acid, 2-4 parts butanetetracarboxylic acid, 0.5-1 part sodium hypophosphite, 0.5-1 part nonionic surfactant, and 70-80 parts deionized water.
4. The antistatic finishing method according to claim 3, 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 antistatic finishing method 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 antistatic finishing method 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 antistatic finishing method according to claim 4, characterized in that: The fermentation conditions are: closed fermentation at 32-35℃ for 18-24 hours.
8. The antistatic finishing method according to claim 3, characterized in that: The antistatic finishing solution is prepared as follows: under conditions of 45-55℃ and 200-300r / min, hydrolyzed soybean protein and glycerol are added sequentially to deionized water and stirred until completely dissolved. Hydrogenated castor oil, persimmon extract and nonionic surfactant are added, the temperature is raised to 60-70℃ and stirred until the system is homogeneous. Sodium hypophosphite is added and stirred until completely dissolved. Itaconic acid is added, stirred evenly and then cooled to room temperature to obtain the antistatic finishing solution.
9. The antistatic finishing method according to claim 1, characterized in that: In step (4), the fabric is subjected to two dips and two nips treatments with an antistatic finishing liquid at room temperature. The dip and nips treatment time is 10-15s, the dip and nips treatment time is 8-12s, and the nips treatment rate is 65-75%.
10. The antistatic finishing method according to claim 1, characterized in that: In step (4), the drying process parameters are: pre-drying at 100-110℃ for 3-5 minutes, and then shaping at 110-120℃ for 0.5-1.5 minutes.