Antistatic easy-care worsted wool fabric and method for producing the same

Abstract

The application belongs to the technical field of wool fabric, and particularly relates to an antistatic easy-care worsted wool fabric and a preparation method thereof. The fabric is spun from high-count wool fibers and conductive fibers, and is treated by a composite finishing agent. The composite finishing agent comprises 5-10 parts of reactive antistatic agent, 3-6 parts of butane tetracarboxylic acid, 1-3 parts of penetrating agent, and 80-90 parts of deionized water. The preparation method comprises the steps of fiber blending, weaving, washing and milling, composite finishing agent dipping, washing, and baking. Through the synergistic effect of conductive fiber blending and the composite finishing agent, a stable covalent crosslinking network is constructed in the fiber and between the fibers, so that the fabric has excellent antistatic property, anti-dustiness, water washing size stability, and wrinkle resistance, and the effect is long-lasting. The technical problems of easy dustiness and easy felting shrinkage of worsted wool fabric are solved.

Description

Technical Field

[0001] This invention belongs to the field of wool fabric technology, specifically relating to an antistatic and easy-care worsted wool fabric and its preparation method. Background Technology

[0002] Worsted wool fabrics, especially high-count worsted knitted felted fabrics, possess advantages such as a fine surface, good warmth retention, and excellent resilience, making them ideal for high-end suits, jackets, and trousers. However, this type of fabric has two significant drawbacks: firstly, due to the inherent scaly structure of wool fibers, it is prone to felting during washing, resulting in poor dimensional stability and difficulty in care, typically requiring dry cleaning; secondly, dark-colored products are particularly susceptible to attracting lint and debris due to static electricity, affecting both appearance and user experience.

[0003] In existing technologies, shrinkage issues are typically addressed by using anti-shrinkage wool or resin-based anti-shrinkage finishing. However, anti-shrinkage wool cannot replicate the delicate texture of worsted felted fabrics, and post-finishing anti-shrinkage treatments (such as chlorination or oxidation) easily lead to problems like uneven coloring and discoloration in dyed fabrics, resulting in low yield rates. To address antistatic issues, blended conductive fibers (such as metal fibers or carbon fibers) or surfactant-based antistatic agents are often used in post-finishing. The former may affect the fabric's hand feel and appearance, while the latter has poor durability, with its antistatic effect significantly diminishing after several washes. Furthermore, existing antistatic treatments are often based on physical mixing, lacking chemical bonding, resulting in limited functionality and insufficient durability.

[0004] Therefore, there is an urgent need in this field to develop a fabric and its preparation method that can impart excellent and durable antistatic properties to worsted wool fabrics and significantly improve their dimensional stability after washing. Summary of the Invention

[0005] This invention aims to solve the problems of existing worsted wool fabrics being prone to attracting lint and dust, having poor dimensional stability after washing, and being difficult to care for. Through the synergistic effect of conductive fiber blending and chemical cross-linking with reactive composite finishing agents, this invention provides a worsted wool fabric that is durable, antistatic, and easy to care for, as well as its preparation method. This allows the fabric to maintain a high-end style while possessing durable antistatic properties and dimensional stability after washing.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] This invention provides an antistatic and easy-care worsted wool fabric, which is made of a blend of high-count wool fibers and conductive fibers, and treated with a composite finishing agent. The high-count wool fibers have a count of 80-100. The conductive fibers are polyaniline composite conductive fibers or carbon black composite conductive fibers, and their mass fraction in the blended yarn is 3%-5%. The composite finishing agent contains the following components by weight: 5-10 parts of reactive antistatic agent, 3-6 parts of butanetetracarboxylic acid, 1-3 parts of penetrant, and 80-90 parts of deionized water. The preparation method of the composite finishing agent is as follows: in a reaction vessel, a metered amount of deionized water is first added, and at 25°C and a stirring speed of 200-300 rpm, the penetrant and reactive antistatic agent are added sequentially, and stirred for 10-15 minutes until uniform. Finally, butanetetracarboxylic acid is slowly added, and stirring is continued for 20-30 minutes to obtain a uniform and transparent composite finishing agent. The reactive antistatic agent is an organosilicon quaternary ammonium salt.

[0008] This invention also provides a method for preparing an antistatic, easy-care worsted wool fabric, the method comprising the following steps:

[0009] S1: High-count wool fibers and conductive fibers are mixed in a certain proportion, and the blended yarn is produced by ring spinning and then woven into fabric.

[0010] S2: The woven fabric is washed and felted to remove impurities and felt the fabric surface. Then it is immersed in a composite finishing agent with a liquor ratio of 1:10-1:15 and treated at 20-30℃ for 20-40 minutes to obtain the pre-finished fabric.

[0011] S3: Wash the pre-finished fabric with water at a liquor ratio of 1:10 for 10-15 minutes at room temperature to remove unreacted composite finishing agents.

[0012] S4: Pre-dry the washed fabric at 80-90℃ for 3-5 minutes, and then bake it at 130-150℃ for 1-2 minutes to obtain the dried fabric, which is an antistatic and easy-care worsted wool fabric.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] (1) This invention blends conductive fibers with high-count wool fibers and treats them with a composite finishing agent that uses organosilicon quaternary ammonium salt as an antistatic agent and butanetetracarboxylic acid as a crosslinking agent. The carboxyl group of butanetetracarboxylic acid reacts with the hydroxyl / amino groups on the wool fiber molecular chain for esterification / amidation, and reacts with the active groups in organosilicon quaternary ammonium salt to form a stable covalent crosslinking network. This achieves efficient static dissipation and imparts excellent antistatic properties and washability through covalent crosslinking, effectively solving the technical problems of traditional antistatic finishing being not washable and dark fabrics being easily stained with dust.

[0015] (2) This invention uses a covalent cross-linking reaction between butanetetracarboxylic acid and the hydroxyl and amino groups on the molecular chain of wool fibers to construct a stable and flexible three-dimensional network structure inside and between the fibers. This cross-linking network restricts the relative slippage of the fibers during the washing process at the molecular level, thereby fundamentally solving the felting problem caused by the scale structure of wool and giving the fabric excellent dimensional stability during washing. At the same time, the reaction does not form a rigid film on the fiber surface, thus completely preserving the original soft feel and high-end style of high-count wool.

[0016] (3) The composite finishing agent preparation method provided by the present invention is simple, the raw materials are all commercially available common chemicals, the overall process flow is highly compatible with existing worsted fabric production lines, and it is easy to achieve large-scale stable production. While improving the functionality and yield of products, it has significant industrialization advantages and economic benefits. Attached Figure Description

[0017] Figure 1 This is a chemical diagram illustrating the process of the woven fabric being impregnated in the composite finishing agent in step S2 of the preparation method of the present invention, where R represents the carbon chain skeleton of butanetetracarboxylic acid, and SiQ represents the silicon group and quaternary ammonium group portion of the organosilicon quaternary ammonium salt.

[0018] Figure 2 The antistatic performance test results are for the fabrics prepared in Examples 1-3 and Comparative Example 1 of this invention.

[0019] Figure 3 The results show the antistatic durability test results of the fabrics prepared in Examples 1-3 and Comparative Example 1 of this invention. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of 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 skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those familiar to those skilled in the art. Furthermore, any methods and materials similar to or equivalent to those described herein may be applied to this invention. The preferred embodiments and materials described herein are for illustrative purposes only and do not limit the scope of this application.

[0022] Example 1: This example provides an antistatic and easy-care worsted wool fabric. The antistatic and easy-care worsted wool fabric is made of high-count wool fibers and conductive fibers, and is treated with a composite finishing agent. The high-count wool fibers have a count of 80. The conductive fibers are polyaniline composite conductive fibers, and their mass fraction in the blended yarn is 3%. The composite finishing agent contains the following components in parts by weight: 5 parts reactive antistatic agent, 3 parts butanetetracarboxylic acid, 1 part penetrant, and 80 parts deionized water. The reactive antistatic agent is an organosilicon quaternary ammonium salt.

[0023] The preparation method of the composite finishing agent is as follows: In a reaction vessel, first add 80 parts of measured deionized water, and then add 1 part of penetrant and 5 parts of reactive antistatic agent in sequence at 25°C and 200 rpm. Stir for 10 minutes until uniform, and finally slowly add 3 parts of butanetetracarboxylic acid. Continue stirring for 20 minutes to obtain a uniform and transparent composite finishing agent.

[0024] This embodiment also provides a method for preparing an antistatic and easy-care worsted wool fabric, the method comprising the following steps:

[0025] S1: Mix 80-count high-count wool fiber with polyaniline composite conductive fiber at a mass fraction ratio of 97:3, use ring spinning worsted spinning process to make blended yarn, and weave it into fabric.

[0026] S2: The woven fabric undergoes washing and fulling to remove impurities and full the surface. It is then immersed in a composite finishing agent at a liquor ratio of 1:10 for 20 minutes at 20°C. During this process, the carboxyl groups of butanetetracarboxylic acid in the composite finishing agent undergo esterification / amidation reactions with the hydroxyl / amino groups on the wool fiber molecular chains, and also react with the active groups in the organosilicon quaternary ammonium salt to form a stable covalent cross-linked network. The reaction mechanism is as follows: Figure 1 As shown, the fabric is obtained after preliminary finishing.

[0027] S3: Wash the pre-finished fabric with water at a liquor ratio of 1:10 for 10 minutes at room temperature to remove unreacted composite finishing agents;

[0028] S4: Pre-dry the washed fabric at 80℃ for 3 minutes, and then bake it at 130℃ for 1 minute to obtain the dried fabric, which is an antistatic and easy-care worsted wool fabric.

[0029] Example 2: This example provides an antistatic and easy-care worsted wool fabric. The antistatic and easy-care worsted wool fabric is made of a blend of high-count wool fibers and conductive fibers, and is treated with a composite finishing agent. The high-count wool fibers have a count of 90. The conductive fibers are carbon black composite conductive fibers, and their mass fraction in the blended yarn is 4%. The composite finishing agent contains the following components in parts by weight: 7 parts reactive antistatic agent, 4 parts butanetetracarboxylic acid, 2 parts penetrant, and 85 parts deionized water. The reactive antistatic agent is an organosilicon quaternary ammonium salt.

[0030] The preparation method of the composite finishing agent is as follows: In a reaction vessel, first add 85 parts of measured deionized water, and then add 2 parts of penetrant and 7 parts of reactive antistatic agent in sequence at 25°C and 250 rpm. Stir for 12 minutes until uniform, and finally slowly add 4 parts of butanetetracarboxylic acid. Continue stirring for 25 minutes to obtain a uniform and transparent composite finishing agent.

[0031] This embodiment also provides a method for preparing an antistatic and easy-care worsted wool fabric, the method comprising the following steps:

[0032] S1: 90-count high-count wool fiber and carbon black composite conductive fiber are mixed in a mass fraction ratio of 96:4, and the blended yarn is made by ring spinning and woven into fabric.

[0033] S2: The woven fabric is washed and felted to remove impurities and felt the fabric surface. Then it is immersed in a composite finishing agent with a liquor ratio of 1:12 and treated at 25°C for 30 minutes to obtain the pre-finished fabric.

[0034] S3: Wash the pre-finished fabric with water at a liquor ratio of 1:10 for 12 minutes at room temperature to remove unreacted composite finishing agents.

[0035] S4: Pre-dry the washed fabric at 85℃ for 4 minutes, and then bake it at 140℃ for 1.5 minutes to obtain the dried fabric, which is an antistatic and easy-care worsted wool fabric.

[0036] Example 3: This example provides an antistatic and easy-care worsted wool fabric. The antistatic and easy-care worsted wool fabric is made of high-count wool fibers and conductive fibers, and is treated with a composite finishing agent. The high-count wool fibers have a count of 100. The conductive fibers are polyaniline composite conductive fibers, and their mass fraction in the blended yarn is 5%. The composite finishing agent contains the following components in parts by weight: 10 parts reactive antistatic agent, 6 parts butanetetracarboxylic acid, 3 parts penetrant, and 90 parts deionized water. The reactive antistatic agent is an organosilicon quaternary ammonium salt.

[0037] The preparation method of the composite finishing agent is as follows: In a reaction vessel, first add 90 parts of measured deionized water, and then add 3 parts of penetrant and 10 parts of reactive antistatic agent in sequence at 25°C and 300 rpm. Stir for 15 minutes until uniform, and finally slowly add 6 parts of butanetetracarboxylic acid. Continue stirring for 30 minutes to obtain a uniform and transparent composite finishing agent.

[0038] This embodiment also provides a method for preparing an antistatic and easy-care worsted wool fabric, the method comprising the following steps:

[0039] S1: Mix 100-count high-count wool fiber with polyaniline composite conductive fiber at a mass ratio of 95:5, use ring spinning worsted spinning process to make blended yarn, and weave it into fabric.

[0040] S2: The woven fabric is washed and felted to remove impurities and felt the fabric surface. Then it is immersed in a composite finishing agent with a liquor ratio of 1:15 and treated at 30°C for 40 minutes to obtain the pre-finished fabric.

[0041] S3: Wash the pre-finished fabric with water at a liquor ratio of 1:10 for 15 minutes at room temperature to remove unreacted composite finishing agents.

[0042] S4: Pre-dry the washed fabric at 90℃ for 5 minutes, and then bake it at 150℃ for 2 minutes to obtain the dried fabric, which is an antistatic and easy-care worsted wool fabric.

[0043] Comparative Example 1: This comparative example provides a comparative fabric and its preparation method. The difference between this and Example 3 is that the fabric is not treated with a composite finishing agent. The preparation method replaces the composite finishing agent in step S2 with an equal weight of deionized water. All other aspects remain unchanged.

[0044] Experimental methods:

[0045] Antistatic performance testing: Following GB / T 12703.1-2021 "Textiles - Test Methods for Electrostatic Properties - Part 1: Corona Charging Method", under conditions of 20℃±2℃ and 30%±5% relative humidity, an electrostatic decay tester meeting the standard requirements was used to charge the fabrics prepared in Examples 1-3 and Comparative Example 1 using the corona charging method, and their electrostatic voltage half-life was measured. Referring to GB / T 12703.2-2021 "Textiles - Test Methods for Electrostatic Properties - Part 2: Manual Friction Method", under conditions of 20℃±2℃ and 30%±5% relative humidity, the fabrics prepared in Examples 1-3 and Comparative Example 1 were rubbed manually, and their surface charge density after friction was measured. The results are as follows: Figure 1 As shown.

[0046] Antistatic durability test: The fabrics prepared in Examples 1-3 and Comparative Example 1 were washed five times, and then tested again according to GB / T 12703.1-2021 "Textiles - Test methods for electrostatic properties - Part 1: Corona charging method" and GB / T12703.2-2021 "Textiles - Test methods for electrostatic properties - Part 2: Manual rubbing method". The results are as follows. Figure 2 As shown.

[0047] Lint and dust repellency test: The fabrics prepared in Examples 1-3 and Comparative Example 1 were cut into 20cm×20cm samples. Under dry conditions, they were placed in a roller friction tester along with standard black wool fabric and cotton lint to simulate friction and lint adhesion during wear. The degree of lint and dust adhesion on the sample surface was then rated, with 1 being the worst (severely soiled) and 5 being the best (almost no soiling). The results are shown in Table 1.

[0048] Dimensional stability testing: Following the 5A washing and A-type drying procedure (lay-to-dry) of GB / T 8629-2017 "Textiles for Testing - Household Washing and Drying Procedures", the original warp and weft lengths L0 of the fabric samples prepared in Examples 1-3 and Comparative Example 1 were measured. The warp and weft lengths L1 were then recorded after 1, 3, and 5 wash-dry cycles. The dimensional change rate was calculated, and the results are shown in Table 2. The formula for calculating the dimensional change rate is:

[0049] Dimensional change rate (%) = .

[0050] Wrinkle recovery test: According to GB / T 3819-1997 "Determination of wrinkle recovery of textile fabrics - Recovery angle method", the quick-elastic wrinkle recovery angle (warp + weft) of the fabrics prepared in Examples 1-3 and Comparative Example 1 was measured, and the results are shown in Table 3.

[0051] Table 1 Test results of anti-lint and ash retention performance

[0052]

[0053] Table 2 Dimensional stability test results

[0054]

[0055] Table 3 Results of anti-wrinkle recovery test

[0056]

[0057] from Figure 2 and Figure 3It can be seen that all embodiments exhibit excellent antistatic properties, with a static voltage half-life far less than the conventional requirement of 10-20 seconds and an extremely low charge surface density. After 5 washes, the antistatic performance of each embodiment shows a slight and reasonable decrease due to the loss of some composite finishing agents, but the performance is still far superior to the comparative example, indicating that its antistatic properties have excellent durability. Table 1 analysis shows that the anti-lint and antistatic performance results are highly positively correlated. Example 3 hardly attracts lint, while Comparative Example 1 easily attracts lint due to severe static electricity, proving that the antistatic treatment of the present invention can effectively improve the problem of lint attracting in actual wear. After 5 washes, as shown in Table 2, the absolute value of the warp and weft dimensional change rate of all embodiments is controlled at ≤2.5%, meeting the dimensional stability requirements. The larger the recovery angle, the better the wrinkle resistance and the easier it is to care for. Observing the results in Table 3, it can be found that the wrinkle recovery angle of the fabrics prepared in Examples 1-3 is significantly larger than that of Comparative Example 1, proving that the present invention not only imparts antistatic properties to the fabric, but also significantly improves its wrinkle resistance and ease of care.

[0058] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

[0059] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention. The actual application is not limited to this. In conclusion, if those skilled in the art are inspired by this description and design similar methods and embodiments without departing from the spirit of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. An antistatic, easy-care worsted wool fabric, characterized in that, The antistatic and easy-care worsted wool fabric is made of a blend of high-count wool fibers and conductive fibers, and is treated with a composite finishing agent. The high-count wool fibers have a count of 80-100. The conductive fibers are polyaniline composite conductive fibers or carbon black composite conductive fibers. The composite finishing agent contains the following components by weight: 5-10 parts of reactive antistatic agent organosilicon quaternary ammonium salt, 3-6 parts of crosslinking agent butanetetracarboxylic acid, 1-3 parts of penetrant, and 80-90 parts of deionized water. The preparation method of the composite finishing agent is as follows: first, add a measured amount of deionized water and stir, then add the penetrant and organosilicon quaternary ammonium salt in sequence and stir evenly, and finally slowly add butanetetracarboxylic acid and stir evenly to obtain the composite finishing agent.

2. A method for preparing an antistatic, easy-care worsted wool fabric according to claim 1, characterized in that, The specific steps of the preparation method are as follows: S1: High-count wool fibers are mixed with conductive fibers to form a blended yarn, which is then woven into a fabric. S2: The woven fabric is washed and felted, and then immersed in a composite finishing agent to obtain the pre-finished fabric. S3: Wash the pre-finished fabric with water; S4: Dry the washed fabric to obtain an antistatic, easy-care worsted wool fabric.

3. The method for preparing an antistatic, easy-care worsted wool fabric according to claim 2, characterized in that, In step S2, the bath ratio during the immersion in the composite finishing agent is 1:10-1:15; in step S3, the bath ratio during the water washing process is 1:10.

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