Super fluorine-free water repellent and soil release finishing method for elastic fabrics

Abstract

The application discloses a super-fluorine-free water repellent processing method for elastic fabric, and belongs to the field of textile fabric, which comprises the following steps in sequence: shrinkage, setting, dyeing, water repellent pretreatment, in-dye-pot water repellent processing and setting treatment; the in-dye-pot water repellent processing comprises the following steps: adding 60-80 g / L of a fluorine-free water repellent and 10-20 g / L of a crosslinking agent into a dye vat in sequence, dyeing at a temperature of 40-50 DEG C for 20-30 min, spraying at a pressure of and a flow rate of, and the cycle time of the elastic fabric being. The method can improve the poor water repellent effect of traditional polyester elastic fabric, so that the water repellent effect can reach the water repellent degree of 4-5 before washing according to the national standard ISO4920, 4 after 20 times of washing, and 3-4 after 30 times of washing.

Description

Technical Field

[0001] This invention relates to the field of textile fabrics, and in particular to a super fluorine-free water-repellent processing method for elastic fabrics. Background Technology

[0002] With social development and improved living standards, people are paying more and more attention to the various functional needs of textiles. Fluorine-free water-repellent processing is one such need. Green, environmentally friendly, low-carbon, and energy-saving fluorine-free water-repellent fabrics are becoming increasingly popular among consumers in outdoor sports.

[0003] Existing waterproofing processes have the following technical problems:

[0004] 1) Processing with fluorine-containing C8 carbon or C6 carbon waterproofing agents can easily cause fluorine to dissolve in water during washing, posing a serious safety hazard. An environmentally friendly, fluorine-free, low-carbon, and green processing method meets the needs of modern environmental management progress.

[0005] 2) Traditional fluorine-free water-repellent fabrics have problems such as poor washability, water repellency level of 4 before washing, level 3 after 10 washes, and only level 1-2 after 30 washes. The water repellency effect is poor after air drying, the fabric feels rough, the water repellency effect is uneven, the processing cost is high, and the yield is low.

[0006] 3) Traditional waterproofing processes involve finishing on a setting machine. For example, Chinese invention patent CN113802391A discloses a dyeing and finishing process for an environmentally friendly, fluorine-free, anti-siphon fabric. The woven polyester-spandex greige fabric undergoes pretreatment followed by dyeing, and then reduction washing and setting. A fluorine-free waterproofing agent is added during the setting process. This processing method leads to difficulties in uniformly controlling the amount of liquid on the fabric, resulting in uneven liquid distribution and unstable water repellency. The waterproofing agent can only cross-link and form a film on the fabric surface, causing the fabric to feel stiff and not skin-friendly. Furthermore, the inability to process different color schemes, especially those with significant differences in shade, simultaneously presents a technical bottleneck in the industry, easily leading to color staining. Summary of the Invention

[0007] In order to overcome the defects of the prior art, the technical problem to be solved by the present invention is to provide a super fluorine-free water-repellent processing method for elastic fabrics that are water-resistant and have good water-repellent effect.

[0008] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a super fluorine-free water-repellent processing method for elastic fabric, comprising sequentially performing shrinking, pre-setting, dyeing, water-repellent pretreatment, in-vat water-repellent processing and setting treatment.

[0009] The in-vat water-repellent processing includes the following steps: adding 60-80 g / L of fluorine-free water-repellent agent and 10-20 g / L of crosslinking agent to the dyeing vat in sequence, dyeing process at 40-50℃, constant temperature for 20-30 min, spray pressure of 1.0-1.5 kg, and the cycle time of the elastic fabric is 90-120 s.

[0010] The beneficial effects of this invention are as follows: This invention provides a super fluorine-free water-repellent processing method for elastic fabrics. By setting specific parameters to carry out water-repellent processing in a vat, the poor water-repellent effect of traditional polyester elastic fabrics is improved, so that the water-repellent effect can reach the national standard ISO4920 level 4-5 before washing, level 4 after 20 washes and drying, and level 3-4 or above after 30 washes and drying. Detailed Implementation

[0011] To explain in detail the technical content, objectives, and effects of the present invention, the following description is provided in conjunction with the embodiments.

[0012] The most crucial concept of this invention lies in: improving the water resistance and water-repellent effect of elastic fabrics by setting specific parameters for water-repellent processing in a vat.

[0013] The present invention provides a super fluorine-free water-repellent processing method for elastic fabrics, comprising sequentially performing shrinkage, pre-setting, dyeing, water-repellent pretreatment, in-vat water-repellent processing, and setting treatment.

[0014] The in-vat water-repellent processing includes the following steps: adding 60-80 g / L of fluorine-free water-repellent agent and 10-20 g / L of crosslinking agent to the dyeing vat in sequence, dyeing process at 40-50℃, constant temperature for 20-30 min, spray pressure of 1.0-1.5 kg, and the cycle time of the elastic fabric is 90-120 s.

[0015] Furthermore, the in-vat water-repellent processing includes the following steps: adding 70-75 g / L of fluorine-free water-repellent agent and 15-18 g / L of crosslinking agent sequentially into the dyeing vat, dyeing process at 45-48℃, constant temperature for 23-26 min, spray pressure of 1.2-1.3 kg, and the cycle time of the elastic fabric is 100-110 s.

[0016] As can be seen from the above description, the beneficial effects of the present invention are as follows: by performing water-repellent processing in a vat, setting specific dyeing processes and constant temperature times, the fluorine-free water-repellent agent penetrates into the interior of the elastic fabric fibers, improving the problems of poor water-repellent effect after washing, poor washability, and insufficient water-repellent effect after hanging to dry. The dyeing process temperature and constant temperature time have a crucial impact on the water-repellent effect. If the dyeing process temperature and time are not within the range of this application, the processed elastic fabric will have poor water-repellent effect and be poor washability. At the same time, the processed elastic fabric has a smooth, soft, comfortable, and skin-friendly feel. This application changes the traditional water-repellent setting machine processing and finishing method, and instead adds the fluorine-free water-repellent agent in the dyeing machine for treatment. The operation is simple, and the utilization rate of the fluorine-free water-repellent agent is high, with stable effect.

[0017] Further, the shrinking process specifically involves: preparing a working solution in a shrinking machine, and using the shrinking machine to shrink the elastic fabric. The working solution includes 6-60 g / L of spandex degreasing agent and 2-7 g / L of acid. The temperature of the shrinking machine is 40-100℃, the machine speed is 10-40 m / min, the tension is 10-40 N, and the pressure is 2-4 Bar.

[0018] As can be seen from the above description, by setting specific parameters of the shrinking machine, spinning oil and impurities on elastic fabrics can be removed.

[0019] Further, the pre-setting process specifically involves: using a setting machine to pre-set the elastic fabric, wherein the working fluid of the setting machine is 5-10 g / L refined emulsifier, the setting machine's padding method is 1 dip and 1 pad, the liquid carry-over rate is 60-100%, the temperature is 180-190℃, the machine speed is 15-40 m / min, the over-position rate is 5-30%, and the air volume is 50-90%.

[0020] As can be seen from the above description, the quality of the preform processing directly affects the neatness, width, and stability of the elastic fabric. By setting reasonable processing parameters, the shrinkage of the fabric can be controlled, ensuring the dimensional stability of the fabric and meeting different needs.

[0021] Further, the dyeing specifically involves dyeing the elastic fabric with a dyeing agent, which, by weight, comprises: 0-7% dye, 1-2% high-temperature homogenizing agent, 0.5-1.0% glacial acetic acid, 1-1.5% caustic soda flakes, 3-4% sodium hydrosulfite, and 1-2% soaping agent.

[0022] As can be seen from the above description, dyeing can enrich the variety of fabric colors and patterns, improve the appearance and performance of finished products, increase the added value of fabrics, and endow fabrics with special functions.

[0023] Furthermore, the dyeing and water-repellent pretreatment process includes a reduction cleaning step.

[0024] As can be seen from the above description, when using medium to dark colors in dyeing, reduction cleaning is also required. Reduction cleaning removes surface floating color and adhering dye, making the fabric color more vibrant.

[0025] Furthermore, the restoration cleaning includes the following steps:

[0026] Surfactants are used to perform a reductive cleaning of the dyed fabric.

[0027] Furthermore, the water-repellent pretreatment includes the following steps:

[0028] S1: The elastic fabric is washed with water at a temperature of 40-60°C for 10-20 minutes.

[0029] S2: Add 2-3% pretreatment agent to the dyeing vat for 5-10 minutes. The temperature inside the dyeing vat is 70-80℃. After 10-20 minutes of adding the agent, drain the liquid and perform the first and second water washes. The temperature of the first water wash is 40-70℃, and the temperature of the second water wash is 25-35℃.

[0030] Furthermore, the pretreatment agent is 3-8% sodium methylene bisnaphthalene sulfonate.

[0031] As described above, the water-repellent pretreatment completely removes residual soap and detergent residue from the fabric, creating a favorable environment for the subsequent water-repellent treatment and preventing reactions with the fluorine-free water-repellent agent, thus avoiding abnormal phenomena such as whitening upon handling. Furthermore, the specific selection of 3-8% sodium methylene bis(naphthalene)sulfonate as the pretreatment agent will not affect the effectiveness of the fluorine-free water-repellent agent in the subsequent water-repellent treatment steps.

[0032] Furthermore, the fluorine-free waterproofing agent is PHOBOL RSH or Jintexguard DWR-P920, and the crosslinking agent is hexamethylene diisocyanate.

[0033] As can be seen from the above description, by using a specific crosslinking agent, chemical bonds are generated between linear molecules, which link the linear molecules together to form a network structure, thereby improving the strength and elasticity of polymer materials.

[0034] Furthermore, the shaping process specifically involves shaping and finishing using a shaping machine. The shaping machine operates on a 1-dip-1-roll method, with a pressure of 2-3 bar, a liquid carryover rate of 60-100%, a temperature of 140-160°C, a machine speed of 15-30 m / min, an over-position rate of 0-50%, an air volume of 80-100%, and a baking time of 90-120 s.

[0035] As can be seen from the above description, by setting specific parameters to shape and finish the fabric, the fabric's hand feel, slippage, color, width, strength, and appearance can be improved, while also stabilizing its dimensions.

[0036] Furthermore, the raw materials used to make the elastic fabric include polyester.

[0037] As described above, polyester is a major type of synthetic fiber, and elastic fabrics made from polyester are characterized by high strength and good elasticity. The elastic fabric of this invention can be pure polyester elastic fabric, polyester-spandex blended elastic fabric, or polyester-spandex elastic fabric. The method provided by this invention can perform in-bottle water-repellent treatment on all of these fabrics, improving the water-repellent effect to a water repellency level of 4 or higher (including level 4) after 20 washes and a water repellency level of 3 or higher (including level 3) after 30 washes, thus making it more wash-resistant.

[0038] Embodiment 1 of the present invention is as follows:

[0039] A super fluorine-free water-repellent processing method for elastic fabric includes sequentially performing shrinkage, pre-setting, dyeing, water-repellent pretreatment, in-vat water-repellent processing, and finishing treatment.

[0040] The elastic fabric is made of recycled polyester, brand name KZS0793; the fluorine-free waterproofing agent is PHOBOL RSH, purchased from Huntsman Textiles & Chemicals (China) Co., Ltd., Asia Pacific; the pretreatment agent is 3-8% sodium methylene bis(naphthalene) sulfonate, CAS number 36290-04-7; the special spandex degreasing agent HT-WY BS is purchased from Jiangsu Dewang Digital Technology Co., Ltd.; Disperse Orange WD, Disperse Ruby WD BS, and Disperse Deep Blue WD-N are all purchased from Hangzhou Flat Glass Co., Ltd.; the high-temperature dispersing leveling agent K-541 is purchased from LIMING GROUP; and the soaping agent HP-18 is purchased from Fujian Yingpin New Material Technology Co., Ltd.

[0041] The shrinking process is as follows: a working solution is prepared in a shrinking machine, and the elastic fabric is shrunk by the shrinking machine. The working solution consists of 20g / L of special spandex degreasing agent HT-WY bs, 3g / L of glacial acetic acid and water. The temperature of the shrinking machine is 60℃, the speed is 18m / min, the tension is 13N, and the pressure is 2Bar.

[0042] The pre-setting process specifically involves using a pre-setting machine to pre-set the elastic fabric. The working fluid of the pre-setting machine is 8g / L refined emulsifier. The immersion and padding method of the pre-setting machine is 1 dip and 1 pad, with a liquid coverage of 100%, a temperature of 190℃, a machine speed of 20M / min, an over-position rate of 30%, and an air volume of 90%.

[0043] The dyeing process specifically involves dyeing the elastic fabric with a dyeing agent. By weight, the dyeing agent consists of 0.7% Disperse Orange (WD), 0.4% Disperse Ruby (WD BS), 2.2% Disperse Deep Blue (WD-N), K-541 high-temperature dispersing leveling agent, 0.8% glacial acetic acid, 1.3% caustic soda flakes, 3.5% sodium hydrosulfite, and 1.5% soaping agent HP-18.

[0044] The water-repellent pretreatment specifically includes:

[0045] S1: The elastic fabric is washed with water at a temperature of 50°C for 10-20 minutes.

[0046] S2: Add 3% pretreatment agent to the dyeing vat for 8 minutes. The temperature inside the dyeing vat is 75°C. After 15 minutes of adding the agent, drain the liquid and perform the first and second water washes. The temperature of the first water wash is 60°C and the temperature of the second water wash is 27°C.

[0047] The water-repellent treatment in the dyeing vat is as follows: 50g / L of fluorine-free waterproofing agent and 15g / L of crosslinking agent are added sequentially to the dyeing vat, the dyeing process is 40℃, the temperature is kept constant for 30 minutes, the spray pressure is 1.0kg, and the cycle time of the elastic fabric is 90s.

[0048] The shaping process specifically involves shaping and finishing using a shaping machine. The shaping machine operates on a 1-dip-1-roll method, with a pressure of 2 bar, a liquid carryover rate of 75%, a temperature of 160°C, a machine speed of 18 m / min, an over-position rate of 30%, an air volume of 95%, and a baking time of 100 s.

[0049] Embodiment 2 of the present invention is as follows:

[0050] A super fluorine-free water-repellent processing method for elastic fabric includes sequentially performing shrinkage, pre-setting, dyeing, water-repellent pretreatment, in-vat water-repellent processing, and finishing treatment.

[0051] The elastic fabric is made of recycled polyester, brand name KZD0875; the fluorine-free waterproofing agent is Jintexguard DWR-P920, purchased from Fuying Technology Chemical Co., Ltd.; the pretreatment agent is 3-8% sodium methylene bisnaphthalene sulfonate, CAS number 36290-04-7; the special spandex degreasing agent HT-WY BS is purchased from Jiangsu Dewang Digital Technology Co., Ltd.; Disperse Orange WD, Disperse Red WD BS, and Disperse Deep Blue WD-N are all purchased from Hangzhou Fuleant Co., Ltd.; the high-temperature dispersing leveling agent K-541 is purchased from LIMING GROUP; and the soaping agent HP-18 is purchased from Fujian Yingpin New Material Technology Co., Ltd.

[0052] The shrinking process is as follows: a working solution is prepared in a shrinking machine, and the elastic fabric is shrunk by the shrinking machine. The working solution consists of 6g / L spandex degreasing agent, 2g / L acid and water. The temperature of the shrinking machine is 40℃, the speed is 10m / min, the tension is 10N and the pressure is 2Bar.

[0053] The pre-setting process specifically involves using a pre-setting machine to pre-set the elastic fabric. The working fluid of the pre-setting machine is 5g / L refined emulsifier. The immersion and padding method of the pre-setting machine is 1 dip and 1 pad, with a liquid content of 60%, a temperature of 180℃, a speed of 15m / min, an over-position rate of 5%, and an air volume of 50%.

[0054] The dyeing process specifically involves dyeing the elastic fabric with a dyeing agent. By weight, the dyeing agent includes: Disperse Orange WD 0.7%, Disperse Ruby WD BS 0.4%, Disperse Deep Blue WD-N 2.2%, High-Temperature Dispersing Leveling Agent K-5411%, Glacial Acetic Acid 0.5%, Caustic Soda 1%, Sodium Hydrosulfite 3%, and Soaping Agent HP-181%.

[0055] The water-repellent pretreatment specifically includes:

[0056] S1: The elastic fabric is washed with water at a temperature of 40°C for 10 minutes.

[0057] S2: Add 2% pretreatment agent to the dyeing vat for 5 minutes. The temperature inside the dyeing vat is 70°C. After 10 minutes of adding the agent, drain the liquid and perform the first and second water washes. The temperature of the first water wash is 40°C and the temperature of the second water wash is 25°C.

[0058] The water-repellent treatment in the dyeing vat is as follows: 60g / L of fluorine-free waterproofing agent and 10g / L of crosslinking agent are added sequentially to the dyeing vat, the dyeing process is 40℃, the temperature is kept constant for 20 minutes, the spray pressure is 1.5kg, and the cycle time of the elastic fabric is 120s.

[0059] The shaping process specifically involves shaping and finishing using a shaping machine. The shaping machine operates on a 1-dip-1-roll method, with a pressure of 2 bar, a liquid carryover rate of 60%, a temperature of 140°C, a machine speed of 15 m / min, an over-position rate of 10%, an air volume of 80%, and a baking time of 90 s.

[0060] Embodiment 3 of the present invention is as follows:

[0061] A super fluorine-free water-repellent processing method for elastic fabric includes sequentially performing shrinkage, pre-setting, dyeing, water-repellent pretreatment, in-vat water-repellent processing, and finishing treatment.

[0062] The elastic fabric is made of recycled polyester, brand name KZD0875; the fluorine-free waterproofing agent is PHOBOL RSH, purchased from Huntsman Textiles & Chemicals (China) Co., Ltd., Asia Pacific; the pretreatment agent is 3-8% sodium methylene bis(naphthalene) sulfonate, CAS number 36290-04-7; the special spandex degreasing agent HT-WY BS is purchased from Jiangsu Dewang Digital Technology Co., Ltd.; Disperse Orange WD, Disperse Red WD BS, and Disperse Deep Blue WD-N are all purchased from Hangzhou Flat Glass Co., Ltd.; the high-temperature dispersing leveling agent K-541 is purchased from LIMING GROUP; and the soaping agent HP-18 is purchased from Fujian Yingpin New Material Technology Co., Ltd.

[0063] The shrinking process is specifically as follows: a working solution is prepared in a shrinking machine, and the elastic fabric is shrunk by the shrinking machine. The working solution includes 60g / L spandex degreasing agent and 7g / L acid. The temperature of the shrinking machine is 100℃, the speed is 40m / min, the tension is 40N, and the pressure is 4Bar.

[0064] The pre-setting process specifically involves using a pre-setting machine to pre-set the elastic fabric. The working fluid of the pre-setting machine is a 10g / L refined emulsifier. The immersion and padding method of the pre-setting machine is 1 dip and 1 pad, with a liquid coverage of 100%, a temperature of 190℃, a machine speed of 40M / min, an over-position rate of 30%, and an air volume of 90%.

[0065] The dyeing process specifically involves dyeing the elastic fabric with a dyeing agent. By weight, the dyeing agent includes: Disperse Orange WD 0.7%, Disperse Ruby WD BS 0.4%, Disperse Deep Blue WD-N 2.2%, High-Temperature Dispersing Leveling Agent K-5412%, Glacial Acetic Acid 1%, Caustic Soda 1.5%, Sodium Hydrosulfite 4%, and Soaping Agent HP-182%.

[0066] The water-repellent pretreatment specifically includes:

[0067] S1: The elastic fabric is washed with water at a temperature of 60°C for 20 minutes.

[0068] S2: Add 3% pretreatment agent to the dyeing vat for 10 minutes. The temperature inside the dyeing vat is 80°C. After 20 minutes of adding the agent, drain the liquid and perform the first and second water washes. The temperature of the first water wash is 70°C and the temperature of the second water wash is 35°C.

[0069] The water-repellent treatment in the dyeing vat is as follows: 80g / L of fluorine-free waterproofing agent and 20g / L of crosslinking agent are added sequentially to the dyeing vat, the dyeing process is 50℃, the temperature is kept constant for 30 minutes, the spray pressure is 1.2kg, and the cycle time of the elastic fabric is 100s.

[0070] The shaping process specifically involves shaping and finishing the product using a shaping machine. The shaping machine operates on a 1-dip-1-roll method, with a pressure of 3 bar, a liquid carryover rate of 100%, a temperature of 160°C, a machine speed of 30 m / min, an over-position rate of 50%, an air volume of 100%, and a baking time of 120 s.

[0071] Comparative Example 1 of the present invention is:

[0072] The only difference between Comparative Example 1 and Example 1 is that the dyeing process is at 60°C in the in-vat water-repellent processing step.

[0073] Comparative Example 2 of the present invention is as follows:

[0074] The only difference between Comparative Example 2 and Example 1 is that the temperature is kept constant for 50 minutes during the water-repellent processing step inside the cylinder.

[0075] Comparative Example 3 of the present invention is as follows:

[0076] The only difference between Comparative Example 3 and Example 1 is that: no water-repellent pretreatment or in-cylinder water-repellent processing steps are performed, while water-repellent treatment is performed in the molding process.

[0077] Examples 1 and Comparative Examples 1-3 were tested for water repellency according to the standard ISO 4920, and the washing standard ISO 6330. The results are shown in Table 1.

[0078]

[0079] In summary, the present invention provides a super fluorine-free water-repellent processing method for elastic fabrics. By performing water-repellent treatment in a vat, setting specific dyeing processes and constant temperature times, the fluorine-free water-repellent agent penetrates into the interior of the elastic fabric fibers, improving the problems of poor water-repellent effect after washing, poor washability, and insufficient water-repellent effect after hanging to dry. Simultaneously, the processed elastic fabric has a smooth, soft, comfortable, and skin-friendly feel. The processed polyester elastic fabric can achieve a water repellency level of 4 or higher (including level 4) after 20 washes and a water repellency level of 3 or higher (including level 3) after 30 washes, far exceeding the current market industry standard requirement of 1-2 levels of water repellency after 30 washes, making it more wash-resistant. It changes the traditional water-repellent setting machine processing method, allowing the fluorine-free water-repellent agent to be added to the chemical tank of an overflow dyeing machine for treatment. The operation is simple, and the utilization rate of the fluorine-free water-repellent agent is high, with stable results.

[0080] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent modifications made based on the content of the present invention specification, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A method for processing a super fluorine-free water-repellent elastic fabric, characterized in that, The process includes sequentially performing shrinkage, embryo fixation, dyeing, water-repellent pretreatment, in-vat water-repellent processing, and finishing treatment. The in-vat water-repellent processing includes the following steps: adding 60~80g / L of fluorine-free water-repellent agent and 10~20g / L of crosslinking agent to the dyeing vat in sequence, dyeing process at 40~50℃, constant temperature for 20~30min, spraying pressure of 1.0~1.5kg, and the cycle time of the elastic fabric is 90~120s; The water-repellent pretreatment includes the following steps: S1: Wash the elastic fabric with water at a temperature of 40-60℃ for 10-20 minutes; S2: Add 2-3% of a pretreatment agent, which is 3-8% sodium methylene bisnaphthalene sulfonate, to the dyeing vat at a temperature of 70-80℃. After adding the agent, drain the solution 10-20 minutes later and perform a first and second water wash. The temperature of the first water wash is higher than that of the second water wash.

2. The super fluorine-free water-repellent processing method for elastic fabric according to claim 1, characterized in that, The shrinking process includes the following steps: preparing a working solution in a shrinking machine, and shrinking the elastic fabric through the shrinking machine; The working fluid includes 6~60g / L spandex degreasing agent and 2~7g / L acid. The temperature of the shrinking machine is 40~100℃, the speed is 10~40M / min, the tension is 10~40N, and the pressure is 2~4Bar.

3. The super fluorine-free water-repellent processing method for elastic fabric according to claim 1, characterized in that, The pre-setting process includes the following steps: using a pre-setting machine to pre-set the elastic fabric, wherein the working fluid of the pre-setting machine is 5~10g / L refined emulsifier, the pre-setting machine is dipped and rolled once, the liquid content is 60~100%, the temperature is 180~190℃, the machine speed is 15~40M / min, the over-position rate is 5~30%, and the air volume is 50~90%.

4. The super fluorine-free water-repellent processing method for elastic fabric according to claim 1, characterized in that, The dyeing process includes the following steps: dyeing the elastic fabric with a dyeing agent; The dyeing agent comprises, by weight: 0-7% dye, 1-2% high-temperature homogenizer, 0.5-1% glacial acetic acid, 1-1.5% caustic soda flakes, 3-4% sodium hydrosulfite, and 1-2% soaping agent.

5. The super fluorine-free water-repellent processing method for elastic fabric according to claim 4, characterized in that, The dyeing and water-repellent pretreatment process also includes a reduction cleaning step.

6. The super fluorine-free water-repellent processing method for elastic fabric according to claim 1, characterized in that, The fluorine-free waterproofing agent is PHOBOL RSH or Jintexguard DWR-P920, and the crosslinking agent is hexamethylene diisocyanate.

7. The super fluorine-free water-repellent processing method for elastic fabric according to claim 1, characterized in that, The shaping process specifically involves shaping and finishing using a shaping machine. The shaping machine operates on a 1-dip-1-roll method, with a pressure of 2-3 bar, a liquid carryover rate of 60-100%, a temperature of 140-160℃, a machine speed of 15-30 m / min, an over-position rate of 0-50%, an air volume of 80-100%, and a baking time of 90-120 s.

8. The super fluorine-free water-repellent processing method for elastic fabric according to claim 1, characterized in that, The raw materials used to make the elastic fabric include polyester.

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