Preparation method of modified cashmere wool and blended yarn

Abstract

The invention discloses a preparation method of modified cashmere and wool and blended yarn, and relates to the technical field of textile material treatment. The preparation method comprises the following steps: soaking textile yarns, adding magnesium chloride for soaking, adding a cross-linking agent, heating, adding sodium carbonate to adjust the pH value, carrying out constant-temperature reaction, cooling, adding acetic acid to adjust the pH value, and then adding a softening agent for treatment. And draining, dehydrating and drying to obtain the anti-pilling and machine-washable cashmere wool and blended yarn. Through the innovative staged treatment process, the anti-pilling and machine washing performance is improved synchronously, the relaxation length of the cashmere product after three times of machine washing is-0.8%, the width is-2.1%, the felting size length is + 0.8%, the area is-1.6%, the fuzzing and pilling grade reaches the grade 4, the anti-pilling and machine washing national standard is completely met, and the anti-pilling and machine washing performance of the cashmere product is improved. The problems that cashmere, wool and blended products are prone to pilling, the machine washing shrinkage rate is high, and the nursing cost is high are effectively solved.

Description

Technical Field

[0001] The invention relates to the technical field of textile material processing, and in particular to a method for preparing modified cashmere wool and blended yarn. Background Art

[0002] Traditional cashmere products have the following defects due to the characteristics of the scaly structure on the fiber surface: easy to pilling: friction during wearing causes the fiber ends to become entangled, and the pilling rate can generally only reach level 2 (GB / T4802.4-2020 standard test); difficult to care for: the shrinkage rate after machine washing exceeds 15% (FZ / T73009-2021 standard), and professional dry cleaning is required; single function: the existing anti-shrinkage process mostly uses chlorination treatment, which destroys the fiber strength and is not environmentally friendly.

[0003] The shrink-resistant cashmere treatment process disclosed in the prior art reduces the shrinkage rate to 8-10% by using a single resin coating, but this results in a hardened feel of the fabric and fails to solve the pilling problem. Summary of the Invention

[0004] In view of the above-mentioned deficiencies in the prior art, the present invention provides a method for preparing modified cashmere wool and blended yarn, which effectively solves the problems of easy pilling, high machine washing shrinkage and high maintenance cost of cashmere wool and its blended products.

[0005] To achieve the above-mentioned purpose, the present invention solves the technical problem by adopting a technical solution: providing a method for preparing modified cashmere wool and blended yarn, comprising the following steps: S1. Add magnesium chloride to the textile yarn and soak it, then add a cross-linking agent, then raise the temperature, add sodium carbonate to adjust the pH, and then react at a constant temperature; S2, after cooling, add acetic acid to adjust the pH, and then add softener for treatment; S3. Drain, dehydrate and dry to obtain modified cashmere wool and blended yarn. Then check the appearance quality, label, inner packaging and outer packaging before storing.

[0006] Furthermore, in step S1, the textile yarn is cashmere, wool or / and blended yarn.

[0007] Furthermore, in step S1, the bath ratio is 1:8-12.

[0008] Furthermore, in step S1, the bath ratio is 1:10.

[0009] Furthermore, in step S1, 5-11% magnesium chloride is added to a water bath at 29-31° C. and the mixture is immersed for 3-5 minutes.

[0010] Furthermore, in step S1, 8% magnesium chloride was added to a 30° C. water bath and soaked for 4 minutes.

[0011] Furthermore, in step S1, 3-8% of a cross-linking agent is added.

[0012] Furthermore, in step S1, 6% cross-linking agent was added.

[0013] Furthermore, in step S1, the cross-linking agent is a polyether compound containing a carbamate group.

[0014] Furthermore, in step S1, the cross-linking agent is an anti-felting finishing agent produced by Tanner Chemicals Netherlands.

[0015] Furthermore, in step S1, the temperature is raised to 55-65°C at a rate of 0.5-1.5°C / min.

[0016] Furthermore, in step S1, the temperature is raised to 60°C at a rate of 1°C / min.

[0017] Furthermore, in step S1, the pH is adjusted to 8-10 and then the reaction is carried out at a constant temperature for 10-20 minutes.

[0018] Furthermore, in step S1, the pH is adjusted to 9 and the reaction is carried out at a constant temperature for 15 minutes.

[0019] Furthermore, in step S2, after cooling to 35-45°C, acetic acid is added to adjust the pH to 3-5.

[0020] Furthermore, in step S2, after cooling to 40°C, acetic acid is added to adjust the pH to 4.

[0021] Furthermore, in step S2, 1-3% softener is added and treated for 10-20 minutes.

[0022] Furthermore, in step S2, 2% softener was added and treated for 15 minutes.

[0023] Furthermore, in step S2, the softener is epoxy-modified silicone.

[0024] Furthermore, in step S3, drying is performed at 79-81°C.

[0025] Furthermore, in step S3, drying is performed at 80°C.

[0026] Furthermore, in step S3, the moisture regain of the modified cashmere wool and blended yarn is 14-18%.

[0027] Furthermore, in step S3, the product is put into storage and stored at a constant temperature.

[0028] The modified cashmere wool and blended yarn are prepared by the preparation method of the modified cashmere wool and blended yarn.

[0029] The present invention has the following beneficial effects: 1. The present invention uses an innovative phased treatment process to simultaneously achieve anti-pilling and improved machine washability. The method provided by the present invention is environmentally friendly and efficient, suitable for industrial production, and has significant economic value.

[0030] 2. After shrinkage-proofing cashmere fabric with a special polyurethane polymer, at a certain temperature and under the action of a catalyst, the blocked -NCO groups are released and reactivated. This polyurethane polymer reacts with itself to form a cross-linked network-like polymer film that covers the surface of the cashmere fibers, thereby reducing felting caused by scales. It also reacts with amino, thiol, and hydroxyl groups on the cashmere fibers, forming chemical bonds between the polymer and the wool. This improves the durability of the anti-felting treatment and restricts the movement of the cashmere fibers, resulting in excellent shrinkage-proofing and significantly enhanced anti-pilling properties. Furthermore, the cross-linking agent forms covalent bonds with the amino / hydroxyl groups of cashmere keratin under alkaline conditions, creating a three-dimensional network structure that inhibits scale movement. The epoxy groups of the epoxy-modified silicone softener bind to the fibers in an acidic environment, forming an elastic protective film that reduces the coefficient of friction and improves anti-pilling properties. The synergistic effect of these substances in the present invention gives the resulting cashmere wool and its blended yarn with other fibers the advantages of anti-pilling and machine washability, making it suitable for the production of high-end cashmere yarn and garments. DETAILED DESCRIPTION

[0031] The principles and features of the present invention are described below. The examples are intended only to illustrate the present invention and are not intended to limit the scope of the present invention. In the examples, where specific conditions are not specified, conventional conditions or manufacturer-recommended conditions were used. Reagents or instruments used where the manufacturer is not specified are conventional products that can be purchased commercially.

[0032] Example 1 A method for preparing modified cashmere wool and blended yarn comprises the following steps: S1. Add 8% magnesium chloride to 1 kg of gray 100% pure cashmere yarn in a 30°C water bath and soak for 3-5 minutes at a bath ratio of 1:10. Then, add 6% of a polyether compound containing a carbamate group (an anti-felting finishing agent produced by Tona Chemicals Netherlands). Raise the temperature to 60°C at a rate of 1°C / min, add sodium carbonate to adjust the pH to 9, and then keep the temperature constant for 15 minutes. S2, after cooling to 40 ° C, add acetic acid to adjust the pH to 4, and then add 3% epoxy modified silicone and treat for 15 minutes; S3. After draining and dehydrating, the yarn is dried at 80°C to a moisture regain of 14-18%, thereby obtaining the modified cashmere yarn. The yarn is then inspected for appearance quality, labeling, inner packaging, and outer packaging, and then stored in a constant temperature warehouse.

[0033] Example 2 A method for preparing modified cashmere wool and blended yarn comprises the following steps: S1. Add 5% magnesium chloride to 1 kg of brown 10% cashmere + 90% wool yarn in a 29°C water bath and soak for 3-5 minutes at a bath ratio of 1:8. Then, add 3% of a polyether compound containing a carbamate group (an anti-felting finishing agent produced by Tona Chemicals Netherlands). Then, raise the temperature to 55°C at a rate of 0.5°C / min, add sodium carbonate to adjust the pH to 8, and then keep the temperature constant for 15 minutes. S2, after cooling to 40 ° C, add acetic acid to adjust the pH to 3, and then add 1% epoxy-modified silicone and treat for 15 minutes; S3. After draining and dehydrating, the yarn is dried at 80°C to a moisture regain of 14-18%, thereby obtaining the modified cashmere-wool blended yarn. The yarn is then inspected for appearance quality, labeling, inner packaging and outer packaging, and then stored in a constant temperature warehouse.

[0034] Example 3 A method for preparing modified cashmere wool and blended yarn comprises the following steps: S1. Add 11% magnesium chloride to 1 kg of 100% pure wool yarn in a 31°C water bath and soak for 4 minutes (bath ratio is 1:12). Then add 8% of a polyether compound containing a carbamate group (anti-felting finishing agent produced by Tona Chemicals Netherlands). Then, raise the temperature to 65°C at a rate of 1.5°C / min. Add sodium carbonate to adjust the pH to 10 and keep the reaction at this temperature for 20 minutes. S2. After cooling to 45°C, acetic acid was added to adjust the pH to 5, and then 3% epoxy-modified silicone was added and treated for 20 minutes; S3. After draining and dehydrating, the yarn is dried at 81°C to a moisture regain of 14-18%, thereby obtaining the modified wool yarn. The yarn is then inspected for appearance quality, labeling, inner packaging, and outer packaging, and then stored in a constant temperature warehouse.

[0035] Test Example 1 In order to explore the technical effects of the present invention, the properties of the modified cashmere wool and blended yarn obtained in Example 1 were tested, and the results are shown in Table 1.

[0036] Table 1 Test results

[0037] As shown in Table 1, after three machine washes, the relaxed length of cashmere products decreased by -0.8%, the width decreased by -2.1%, the felted length increased by +0.8%, the area decreased by -1.6%, and the pilling grade reached level 4, which fully complies with the national standard for anti-pilling and machine washability.

[0038] Test Example 2 The shrinkage rates of the modified cashmere wool and blended yarn (i.e., after treatment) obtained in Example 1 and Example 2 were tested respectively, with untreated ordinary cashmere wool as a control. The results are shown in Table 2.

[0039] Table 2 Shrinkage test results

[0040] Shrinkage after treatment = (length before treatment - length after treatment) / length before treatment Shrinkage after washing 3 times = (length before washing - length after washing 3 times) / length before washing As shown in Table 2, the shrinkage rates of Example 1 and Example 2 are 4.1% and 5.7%, respectively. After washing three times, the shrinkage rates of Example 1 and Example 2 are 1.1% and 0.7%, respectively, which are much lower than the shrinkage rate of untreated ordinary cashmere wool after washing three times. This shows that the method provided by the present invention can effectively prevent shrinkage.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for preparing modified cashmere wool and blended yarn, characterized in that: The following steps are involved: S1. Add magnesium chloride to the textile yarn and soak it, then add a cross-linking agent, then raise the temperature, add sodium carbonate to adjust the pH, and then react at a constant temperature; S2, after cooling, add acetic acid to adjust the pH, and then add softener for treatment; S3. Drain, dehydrate and dry to obtain anti-pilling and machine-washable cashmere, wool and blended yarns. Then check the appearance quality, label, inner packaging and outer packaging before storing.

2. The method for preparing modified cashmere wool and blended yarn according to claim 1, wherein: In step S1, the textile yarn is cashmere, wool or / and blended yarn.

3. The method for preparing modified cashmere wool and blended yarn according to claim 1, wherein: In step S1, the bath ratio is 1:8-12.

4. The method for preparing modified cashmere wool and blended yarn according to claim 1, wherein: In step S1, 5-11% magnesium chloride is added to a water bath at 29-31°C and soaked for 3-5 minutes.

5. The method for preparing modified cashmere wool and blended yarn according to claim 1, wherein: In step S1, 3-8% of a cross-linking agent is added, wherein the cross-linking agent is a polyether compound containing a carbamate group.

6. The method for preparing modified cashmere wool and blended yarn according to claim 1, wherein: In step S1, the temperature is raised to 55-65°C at a rate of 0.5-1.5°C / min.

7. The method for preparing modified cashmere wool and blended yarn according to claim 1, wherein: In step S1, the pH is adjusted to 8-10 and then the reaction is carried out at a constant temperature for 10-20 minutes.

8. The method for preparing modified cashmere wool and blended yarn according to claim 1, wherein: In step S2, after cooling to 35-45°C, acetic acid is added to adjust the pH to 3-5.

9. The method for preparing modified cashmere wool and blended yarn according to claim 1, wherein: In step S2, 1-3% softener is added and treated for 10-20 minutes, wherein the softener is epoxy-modified silicone.

10. Modified cashmere wool and blended yarn produced by the method for producing modified cashmere wool and blended yarn according to any one of claims 1 to 9.

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