Treatment process for improving waterproof performance of spandex fabric

Abstract

The invention relates to the technical field of textile, in particular to a treatment process for improving waterproof performance of spandex fabric, which comprises the following steps: putting the fabric into a treatment cylinder: putting the spandex fabric into the treatment cylinder, and immersing the fabric into water according to a bath ratio of 1: 8 to 1: 15; and fabric cleaning: adding a weakly alkaline cleaning agent with the pH value of 7-8 into the treatment cylinder, adjusting the concentration of the cleaning agent in water to 0.3-0.5 g / l, then raising the temperature to 70-80 DEG C, cleaning the fabric for 20-30 minutes at the temperature, and the like. By accurately controlling the ratio of the fabric to water, adopting a weakly alkaline cleaning agent, introducing two waterproof agents (one contains polyurethane and the other contains paraffin and polyurethane) with complementary functions, and optimizing waterproof treatment steps and color fixation treatment, the waterproof performance, the qualified rate and the adaptability of the fabric are remarkably improved; according to the process, uniform distribution and firm attachment of the waterproof agent on the fabric are ensured, and meanwhile, the elasticity, comfort and good air permeability of the fabric are kept.

Description

Technical Field

[0001] The invention relates to the technical field of textiles, and more particularly to a treatment process for improving the waterproof performance of spandex fabrics. Background Art

[0002] In the textile industry, spandex fabrics are widely used in the manufacture of various textiles and footwear materials due to their unique elastic properties and excellent wearing comfort. However, despite the excellent wearing experience of spandex fabrics, the traditional waterproofing process faces many challenges in improving the waterproof performance. Traditionally, the waterproof treatment of spandex fabrics mainly relies on a single waterproofing agent or coating technology. In practical applications, these technologies can usually only improve the waterproof efficiency of fabrics to a relatively low level, about 50% to 60%. This performance level is far from meeting the urgent demand for high-performance waterproof functions of modern textiles, especially in outdoor clothing, sports shoes and other application scenarios, where users have more stringent requirements for fabric waterproof performance; In addition, there are a series of problems in the application of traditional waterproof treatment technology. First, the waterproof effect is unstable and easily affected by environmental factors such as temperature and humidity, which leads to fluctuations in waterproof performance. Second, the coating or waterproof agent is easy to fall off, which not only affects the durability of the fabric, but also may destroy the overall aesthetics of the fabric. Third, the coating treatment may block the tiny pores of the spandex fabric, thereby affecting the breathability of the fabric and the feel when wearing, so that the fabric sacrifices its original comfort and breathability while maintaining its waterproof performance. More importantly, traditional waterproofing processes require the use of large amounts of chemical reagents and energy during the process, which not only increases production costs but also poses potential risks of environmental pollution. As global environmental awareness continues to increase, how to ensure waterproof performance while reducing the impact on the environment has become an important issue that needs to be urgently addressed in the textile industry. Summary of the invention

[0003] The present invention aims to provide an innovative treatment process to address the limitations of traditional waterproof treatment technology in improving the waterproof performance of spandex fabrics. The process aims to significantly improve the waterproof performance of spandex fabrics while maintaining their original elasticity and comfort, as well as good air permeability, and reduce the impact on the environment by reducing the use of chemical reagents and energy consumption, thereby meeting the market demand for high-performance waterproof spandex fabrics.

[0004] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions: The present invention proposes a treatment process for improving the waterproof performance of spandex fabrics, and the treatment process comprises the following steps: a. Fabric into the tank: Place the spandex fabric in the treatment tank and immerse the fabric in water according to the bath ratio of 1:8 to 1:15; b. Cleaning fabrics: Add a weak alkaline detergent with a pH value of 7-8 into the treatment tank, adjust the concentration of the detergent in the water to 0.3-0.5g / l, then raise the temperature to 70-80℃, and clean the fabrics at this temperature for 20-30 minutes; c. Drainage: After cleaning, drain the water in the treatment tank; d. Waterproof treatment: water is re-injected, and the spandex fabric is immersed in water at a bath ratio of 1:8 to 1:15. During this process, two different waterproofing agents are added in no particular order for waterproofing treatment. The concentration of the two waterproofing agents in water is 2-4g / l, and the waterproofing treatment time is 20-30 minutes. The temperature is 70-80℃, and the two different waterproofing agents are added in equal amounts; The main component of one waterproofing agent contains 3-6% polyurethane, and the main component of the other waterproofing agent contains a mixture of 1-2% paraffin and 3-5% polyurethane; e. Color fixing treatment: After completing the waterproof treatment, lower the temperature in the treatment tank to 40-50℃ and perform color fixing treatment for 30-40 minutes; f. Out of the vat: After the color fixing treatment is completed, the fabric is directly taken out of the treatment vat with water and dried to obtain the spandex fabric.

[0005] As a preferred technical solution of the present invention, a waterproofing agent whose main component contains 3-6% polyurethane is produced by 3M Company of the United States.

[0006] As a preferred technical solution of the present invention, a waterproofing agent whose main components include a mixture of 1-2% paraffin wax and 3-5% polyurethane is produced by Dongguan Enke Chemical Co., Ltd.

[0007] As a preferred technical solution of the present invention, in the step b), the rate of heating to 70-80°C is 1-2°C / min.

[0008] As a preferred technical solution of the present invention, in the step e), the rate of reducing the temperature to 40-50°C is 1-2°C / min.

[0009] As a preferred technical solution of the present invention, in the step a), the weight of the spandex fabric entering the cylinder is 5-800kg.

[0010] As a preferred technical solution of the present invention, in the steps b) and d), the bath ratio of the spandex fabric immersed in water is 1:10.

[0011] As a preferred technical solution of the present invention, the main component of one waterproofing agent includes 4% polyurethane, and the main component of the other waterproofing agent includes a mixture of 1% paraffin and 3% polyurethane.

[0012] The beneficial effects of the present invention are as follows: The present invention significantly improves the waterproof performance, pass rate and adaptability of the fabric by accurately controlling the ratio of fabric to water, adopting a weak alkaline detergent, introducing two waterproof agents with complementary functions (one containing polyurethane and the other containing paraffin and polyurethane), and optimizing the waterproofing treatment steps and color fixing treatment. The process ensures the uniform distribution and firm adhesion of the waterproof agent on the fabric, while maintaining the elasticity, comfort and good air permeability of the fabric. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic diagram of a test sample of the spandex fabric of Example 1; Figure 2 is a schematic diagram of a test sample of the spandex fabric of Example 2; Figure 3 This is a schematic diagram of a test sample of spandex fabric of Comparative Example 1; Figure 4 It is a schematic diagram of the test sample of the spandex fabric of comparative example 2. DETAILED DESCRIPTION

[0014] The present invention proposes a treatment process for improving the waterproof performance of spandex fabrics, and the treatment process comprises the following steps: a. Fabric into the tank: Place the spandex fabric in the treatment tank and immerse the fabric in water according to the bath ratio of 1:8 to 1:15; b. Cleaning fabrics: Add a weak alkaline detergent with a pH value of 7-8 into the treatment tank, adjust the concentration of the detergent in the water to 0.3-0.5g / l, then raise the temperature to 70-80℃, and clean the fabrics at this temperature for 20-30 minutes; c. Drainage: After cleaning, drain the water in the treatment tank; d. Waterproof treatment: water is re-injected, and the spandex fabric is immersed in water at a bath ratio of 1:8 to 1:15. During this process, two different waterproofing agents are added in no particular order for waterproofing treatment. The concentration of the two waterproofing agents in water is 2-4g / l, and the waterproofing treatment time is 20-30 minutes. The temperature is 70-80℃, and the two different waterproofing agents are added in equal amounts; The main component of one waterproofing agent contains 3-6% polyurethane, and the main component of the other waterproofing agent contains a mixture of 1-2% paraffin and 3-5% polyurethane; e. Color fixing treatment: After completing the waterproof treatment, lower the temperature in the treatment tank to 40-50℃ and perform color fixing treatment for 30-40 minutes; f. Out of the vat: After the color fixing treatment is completed, the fabric is directly taken out of the treatment vat with water and dried to obtain the spandex fabric.

[0015] Among them, a waterproofing agent whose main component contains 3-6% polyurethane is produced by 3M Company in the United States.

[0016] Among them, a waterproofing agent whose main components include a mixture of 1-2% paraffin and 3-5% polyurethane is produced by Dongguan Enke Chemical Co., Ltd.

[0017] Wherein, in the step b), the rate of heating to 70-80°C is 1-2°C / min.

[0018] Wherein, in the step e), the rate of reducing the temperature to 40-50°C is 1-2°C / min.

[0019] Wherein, in the step a), the weight of the spandex fabric entering the vat is 5-800kg.

[0020] Wherein, in the step b) and the step d), the bath ratio of the spandex fabric immersed in water is 1:10.

[0021] Among them, the main component of one waterproofing agent includes 4% polyurethane, and the main component of the other waterproofing agent includes a mixture of 1% paraffin and 3% polyurethane.

[0022] The present invention proposes the above-mentioned treatment process, which aims to significantly improve the waterproof performance of spandex fabrics while maintaining their original elasticity, comfort and good air permeability. The process not only optimizes the traditional treatment steps, but also achieves remarkable results in improving the product qualification rate and waterproof effect. The following is the working principle and core advantages of the process: How it works Fabric in-tank processing and ratio optimization: Accurately control the ratio of fabric and water to ensure uniform distribution and full wetting of fabric in the treatment tank. Cleaning process and cleaning agent selection: Use weak alkaline cleaning agents to effectively remove dirt and surfactants on the surface of the fabric at a suitable temperature, providing a clean base for subsequent waterproofing treatment; Application and type selection of waterproofing agents: Two waterproofing agents with complementary functions were introduced, one containing polyurethane produced by 3M, and the other containing paraffin and polyurethane produced by Enco. The two waterproofing agents were added in two steps to ensure uniformity and durability of the waterproofing effect; Color fixing treatment: After completing the waterproofing treatment, color fixing treatment is carried out to enhance the fastness of the fabric color; Optimization of subsequent processes: directly take the water out of the tank, dry and finish according to the conventional process to obtain spandex fabric with excellent waterproof performance.

[0023] The present invention has the following effects: Higher pass rate: Improve the cleaning process: By optimizing the type, concentration and processing temperature of the cleaning agent, and accurately controlling the ratio of fabric to water, errors and defective products in the processing process are effectively reduced; Optimized waterproofing steps: Two complementary waterproofing agents are added in two steps to ensure uniform distribution and firm adhesion of the waterproofing agents on the fabric, further reducing the defective product rate; The combined effect of these improvement measures has significantly improved the product qualification rate and brought higher economic benefits to the production enterprises. Better waterproof effect: Two complementary water repellents are used: one with polyurethane as the main ingredient, providing excellent water repellency; the other combines paraffin and polyurethane, which enhances the water repellency while maintaining the breathability of the fabric; Two-step addition method: By precisely controlling the order and time of adding the waterproofing agent, the waterproofing agent is fully penetrated and combined between the fabric fibers, thereby significantly improving the waterproof performance of the fabric, and the waterproofing efficiency can reach more than 80%; These properties make the treated spandex fabric more adaptable to various harsh environments, such as rain and moisture, and provide more lasting protection for the wearer; In summary, the present invention achieves the improvement of the waterproof performance and the improvement of the qualified rate of spandex fabrics by optimizing the processing steps and introducing complementary waterproof agents. This innovative process not only meets the market demand for high-performance waterproof spandex fabrics, but also provides new ideas and technical support for the sustainable development of the textile industry. Example 1

[0024] Fabric preparation: 10 kg of spandex fabric was selected and treated according to the treatment process of the present invention; Processing steps: 1. Fabric into the tank: Place the fabric in the treatment tank and add water at a bath ratio of 1:10; 2. Cleaning fabrics: Add a weak alkaline detergent with a pH value of 7.5 and a concentration of 0.4g / l, heat to 75°C, heat at a rate of 1.5°C / min, and clean for 25 minutes; 3. Drainage: After cleaning, drain the water in the treatment tank; 4. Waterproofing: Refill water, add water in a bath ratio of 1:10, add two waterproofing agents with a concentration of 3g / l, one of which is a waterproofing agent containing 4% polyurethane produced by 3M, and the other is a waterproofing agent containing 1% paraffin and 3% polyurethane produced by Enke. The waterproofing treatment time is 25 minutes and the temperature is 75°C; 5. Color fixing treatment: After completing the waterproof treatment, lower the temperature in the treatment tank to 45°C, and cool it down at a rate of 1.5°C / min for 35 minutes of color fixing treatment; 6. Take out of the vat and dry: After the color fixation treatment is completed, take the fabric out of the treatment vat directly with water and dry it; Waterproof efficiency and performance test (using the national standard GB / T 4744-2013 "Test and evaluation of the waterproof performance of textiles - Water-immersion method" and GB / T 24218.15-2018 "Determination of waterproof and breathable properties of textiles - Part 15: Dynamic water absorption test (spray method)"): Waterproof efficiency test: According to GB / T 4744-2013 standard, use the specified spraying device, place the fabric under standard conditions, spray a certain amount of water at a certain angle and speed, and record the wetting of the fabric surface after spraying. In Example 1, the surface of the treated fabric is only slightly wet after spraying ( Figure 1 As shown in the figure), no water drop penetration occurs. According to the rating method in the standard, its waterproof efficiency reaches more than 85%; Waterproof performance test: According to GB / T 24218.15-2018 standard, a dynamic water absorption test device was used to simulate a rain spray environment, and the water absorption mass and water absorption rate of the fabric within a certain period of time were recorded. Under the spray test, the fabric of Example 1 had low water absorption mass and slow water absorption rate, showing good waterproof performance. Example 2

[0025] Fabric preparation: 10 kg of spandex fabric was also selected, but the concentration of the waterproofing agent was adjusted to 2.5 g / l, and the remaining steps were the same as in Example 1; Waterproof efficiency and performance test: Waterproof efficiency test: According to GB / T 4744-2013 standard, in Example 2, the surface of the fabric was only slightly wet after spraying ( Figure 2 As shown in the figure, the waterproof efficiency reaches more than 80%, which is slightly lower than that of Example 1, but still meets the requirements of high-performance waterproof fabrics; Waterproof performance test: According to the GB / T 24218.15-2018 standard, the fabric of Example 2 also showed good waterproof performance, but compared with Example 1, the water absorption quality and water absorption rate were slightly increased.

[0026] Comparative Example 1 (without complementary waterproofing agent) Fabric preparation and treatment steps: 10kg spandex fabric was selected and treated according to a similar treatment process, but only one waterproofing agent (3M waterproofing agent containing 4% polyurethane) was used at a concentration of 3g / l; Waterproof efficiency and performance test: Waterproof efficiency test: According to GB / T 4744-2013 standard, in comparative example 1, the surface of the fabric showed obvious wetting after spraying ( Figure 3 As shown in the figure), some areas even have water droplets penetrated, and the waterproof efficiency is only about 55%; Waterproof performance test: According to the GB / T 24218.15-2018 standard, the fabric of Example 1 has high water absorption quality and water absorption rate, and poor waterproof performance.

[0027] Comparative Example 2 (cleaning by acid-base neutralization) Fabric preparation and treatment steps: 10 kg of spandex fabric was selected and treated according to a similar treatment process, but the cleaning step adopted an acid-base neutralization method (first adding an acidic cleaning agent, and then adding an alkaline cleaning agent for neutralization), and the remaining steps were the same as in Example 1; Waterproof efficiency and performance test: Waterproof efficiency test: According to GB / T 4744-2013 standard, in comparative example 2, the surface of the fabric also showed obvious wetting after spraying ( Figure 4 As shown), the waterproof efficiency is about 60%, which is slightly higher than that of Comparative Example 1, but still far lower than that of the embodiment.

[0028] Waterproof performance test: According to the GB / T 24218.15-2018 standard, the fabric of Example 2 has high water absorption quality and water absorption rate, and its waterproof performance is also poor.

[0029] The following is a table organized according to the above content, highlighting the differences between Example 1, Example 2, Comparative Example 1 and Comparative Example 2:

[0030] Example 1 and Example 2: The main difference between the two is the concentration of the waterproofing agent. The concentration of the waterproofing agent in Example 1 is higher, resulting in better waterproofing efficiency and performance; Example and Comparative Example 1: Comparative Example 2 used only one waterproofing agent, while Example 1 and Example 2 used two complementary waterproofing agents, which significantly improved the waterproofing efficiency and performance; Embodiment and Comparative Example 1: Comparative Example 2 uses an acid-base neutralization method in the cleaning process, which may affect the waterproof performance of the fabric, resulting in lower waterproof efficiency and performance than the embodiment; These results suggest that the use of complementary water-repellents and appropriate washing practices are essential to improve the water-repellent properties of fabrics.

[0031] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0032] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A treatment process for improving the waterproof performance of spandex fabric, characterized in that: The processing process comprises the following steps: a. Fabric into the tank: Place the spandex fabric in the treatment tank and immerse the fabric in water according to the bath ratio of 1:8 to 1:15; b. Cleaning fabrics: Add a weak alkaline detergent with a pH value of 7-8 into the treatment tank, adjust the concentration of the detergent in the water to 0.3-0.5g / l, then raise the temperature to 70-80℃, and clean the fabrics at this temperature for 20-30 minutes; c. Drainage: After cleaning, drain the water in the treatment tank; d. Waterproof treatment: water is re-injected, and the spandex fabric is immersed in water at a bath ratio of 1:8 to 1:

15. During this process, two different waterproofing agents are added in no particular order for waterproofing treatment. The concentration of the two waterproofing agents in water is 2-4g / l, and the waterproofing treatment time is 20-30 minutes. The temperature is 70-80℃, and the two different waterproofing agents are added in equal amounts; The main component of one waterproofing agent contains 3-6% polyurethane, and the main component of the other waterproofing agent contains a mixture of 1-2% paraffin and 3-5% polyurethane; e. Color fixing treatment: After completing the waterproof treatment, lower the temperature in the treatment tank to 40-50℃ and perform color fixing treatment for 30-40 minutes; f. Out of the vat: After the color fixing treatment is completed, the fabric is directly taken out of the treatment vat with water and dried to obtain the spandex fabric.

2. A treatment process for improving the waterproof performance of spandex fabric according to claim 1, characterized in that: A waterproofing agent whose main component contains 3-6% polyurethane is produced by 3M Company in the United States.

3. A treatment process for improving the waterproof performance of spandex fabric according to claim 1, characterized in that: A waterproofing agent whose main components include a mixture of 1-2% paraffin and 3-5% polyurethane is produced by Dongguan Enke Chemical Co., Ltd.

4. A treatment process for improving the waterproof performance of spandex fabric according to claim 1, characterized in that: In the step b), the rate of heating to 70-80°C is 1-2°C / min.

5. The process for improving the waterproof performance of spandex fabric according to claim 1, characterized in that: In the step e), the temperature is reduced to 40-50°C at a rate of 1-2°C / min.

6. A treatment process for improving the waterproof performance of spandex fabric according to claim 1, characterized in that: In the step a), the weight of the spandex fabric entering the vat is 5-800kg.

7. The process for improving the waterproof performance of spandex fabric according to claim 1, characterized in that: In the step b) and the step d), the bath ratio of the spandex fabric immersed in water is 1:

10.

8. The process for improving the waterproof performance of spandex fabric according to claim 1, characterized in that: The main component of one waterproofing agent includes 4% polyurethane, and the main component of the other waterproofing agent includes a mixture of 1% paraffin and 3% polyurethane.

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