Dyeing and finishing processing method for improving phenolic yellowing resistance of white nylon elastic fabric

Abstract

The invention discloses a dyeing and finishing processing method for improving phenolic yellowing resistance of a white nylon elastic fabric, the technological process comprises the steps of fabric weaving, gray fabric inspection, low-temperature pre-setting, refining, bleaching, low-temperature post-setting and finished product inspection, and the spandex raw material adopted for fabric weaving is low-temperature easily-set spandex; the temperature of the low-temperature pre-setting is 150-170 DEG C, the time is 40-60 seconds, and a working solution of the low-temperature pre-setting contains an anti-yellowing auxiliary agent; the temperature of low-temperature post-setting is 140-160 DEG C, the time is 40-60 s, and a working solution for low-temperature post-setting contains an anti-phenolic yellowing agent, an anti-phenolic yellowing stabilizer, a softening agent and polyurethane. By means of the dyeing and finishing processing method, the CIE whiteness of the nylon elastic fabric before washing is improved to 150 or above, the phenolic yellowing resistance grade before washing reaches 4-5 or above, the phenolic yellowing resistance and phenolic yellowing washing durability of the white nylon elastic fabric are remarkably improved, and the high-quality requirement of sports and outdoor clothes for textiles can be met.

Description

Technical Field

[0001] The invention relates to the technical field of textile dyeing and finishing, and in particular to a dyeing and finishing method for improving the phenol yellowing resistance of white nylon stretch fabric. Background Art

[0002] Nylon stretch fabrics are widely used in clothing, home decoration and other fields due to their excellent elasticity and wear resistance. However, white nylon fabrics are easily affected by environmental factors during processing and storage, resulting in phenolic yellowing, which seriously affects the product's aesthetics and market value. The main reason for phenolic yellowing is that during the storage or use of textiles, the amide groups in nylon fibers are easily oxidatively coupled with phenolic substances (such as BHT antioxidants in packaging materials), forming quinone chromophores, which cause irreversible yellowing of nylon fabrics. These phenolic compounds may originate from pollutants in the air, dye decomposition products, or release from storage and packaging materials. This yellowing not only affects the appearance quality of the fabric and reduces its commercial value, but also has a negative impact on consumers' purchasing intention and the durability of the garment.

[0003] In the existing technology, the phenol yellowing phenomenon is mainly suppressed by adding anti-phenol yellowing agents or adopting reduction cleaning process during the high-temperature pre-setting process of nylon stretch fabrics. However, the above methods have the following defects: the effect of the existing anti-phenol yellowing agents is poorly sustained, and the anti-yellowing performance decreases significantly after multiple washings, and the high-temperature pre-setting treatment is easy to damage the fiber strength and elasticity of the fabric. The current method for testing phenol yellowing of textile fabrics and the industry technology level: According to the test of GB / T 29778 (Evaluation of Potential Phenolic Yellowing in Textile Color Fastness Tests), the white nylon stretch fabric treated by traditional process has a phenol yellowing test level of about 4 before washing. The CIE whiteness of the fabric is measured by a spectrophotometer (such as Datacolor 650). After washing 5 times with the GB / T 8629 4N procedure, according to ΔWI=WI 洗前 -WI 洗后 Calculating the fabric's whiteness index variation (Whiteness Index Variation) reveals a decrease in whiteness index (ΔWI) greater than 15, and the phenol yellowing test result drops to approximately Level 2, failing to meet the requirements for high-end business and outdoor sportswear textiles. The typical criteria for determining fabric quality are: ΔWI ≤ 5: Excellent yellowing resistance, meeting high-end textile requirements; ΔWI 5-10: Moderate yellowing resistance; and ΔWI > 10: Substandard yellowing resistance.

[0004] Nylon spandex fabric is a common nylon stretch fabric. Conventional nylon spandex fabric processing requires a pre-setting temperature of 180-200°C before dyeing and finishing. High temperatures can easily lead to oxidation of the nylon amide groups, damage and breakage of the elastic fiber and spandex molecular chains, and accelerate the adsorption of phenolic compounds into the fabric. Furthermore, high temperatures can easily cause microcracks at the nylon-spandex interface due to thermal stress, significantly increasing the penetration of phenolic compounds into the fibers. These factors contribute to the potential for phenolic yellowing in nylon stretch fabrics compared to other fiber types.

[0005] Therefore, in the current field of textile technology, how to inhibit the occurrence of phenol yellowing from the source of nylon stretch fabric processing and explore an efficient processing method that can effectively inhibit the phenol yellowing phenomenon while maintaining the original excellent physical properties of nylon stretch fabric has become a key issue that needs to be solved urgently. This is of great significance for improving the quality and market competitiveness of white nylon stretch fabric clothing, avoiding yellowing of ready-made clothes during storage, meeting consumer needs, and extending the service life of clothing. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a dyeing and finishing method for improving the resistance of white nylon stretch fabric to phenolic yellowing in response to the shortcomings of the existing technology. The dyeing and finishing method can increase the CIE whiteness of the nylon stretch fabric before washing to above 150, and the resistance to phenolic yellowing before washing reaches level 4-5 or above, thereby significantly improving the resistance to phenolic yellowing and the washing durability of the white nylon stretch fabric, and can meet the high quality requirements of sports and outdoor clothing for textiles.

[0007] The technical solution adopted by the present invention to solve the above technical problems is: a dyeing and finishing method for improving the phenolic yellowing resistance of white nylon stretch fabric, the process flow of the dyeing and finishing method comprises: fabric weaving → grey fabric inspection → low-temperature presetting → refining → bleaching → low-temperature post-setting → finished product inspection, wherein: the spandex raw material used in the fabric weaving is low-temperature easy-setting spandex; the temperature of the low-temperature presetting is 150-170°C, the time is 40-60s, the low-temperature presetting working solution contains: 5-15g / L of anti-yellowing auxiliary agent, and the pH value of the low-temperature presetting working solution is 5-6; the temperature of the low-temperature post-setting is 140-160°C, the time is 40-60s, the low-temperature post-setting working solution contains: 5-10g / L of anti-phenolic yellowing agent, 8-12g / L of anti-phenolic yellowing stabilizer, 8-12g / L of softener and 5-10g / L of polyurethane, and the pH value of the low-temperature post-setting working solution is 5-6.

[0008] The present invention optimizes the dyeing and finishing method. Through a full-process collaborative process, low-temperature easy-setting spandex is used as the spandex raw material of the nylon stretch fabric. Through low-temperature pre-setting and adding an anti-yellowing auxiliary agent, and through low-temperature post-setting and adding an anti-phenol yellowing agent, an anti-phenol yellowing stabilizer and polyurethane, the three-step synergistic effect can significantly improve the anti-phenol yellowing performance of the white nylon stretch fabric, which can meet the high quality requirements of sports and outdoor clothing for textiles.

[0009] The present invention adopts low-temperature easy-setting spandex as the spandex raw material of nylon stretch fabric, realizing pre-setting of the fabric under low-temperature conditions of 150-170°C, which is lower than the pre-setting temperature of 180-200°C of conventional nylon spandex fabric. It can significantly reduce or avoid oxidation of nylon fiber and spandex under high-temperature heating conditions and damage to the fiber polymer chain segments, thereby improving the anti-phenol yellowing performance of the fabric from the source of the fabric.

[0010] The low-temperature post-setting working solution of the dyeing and finishing method of the present invention contains an anti-phenolic yellowing agent, an anti-phenolic yellowing stabilizer, a softener, and polyurethane. The softener and polyurethane work synergistically to firmly anchor the anti-phenolic yellowing agent on the fiber surface, enhancing its fixation, thereby significantly improving the washability and durability of the fabric, ensuring the fabric's anti-phenolic yellowing function. Furthermore, the film-forming properties of the polyurethane are utilized to form a long-lasting protective barrier.

[0011] As an example, the low temperature easy-setting spandex is a product of model EASY SET LYCRA produced by INVISTA or a product of model EASY SET LYCRA produced by Hyosung Group of South Korea. The above-mentioned low-temperature easy-setting spandex is made by introducing a rigid aromatic ring diol (such as 2,5-furan dimethanol) into the spandex elastic fiber polymer and adjusting the ratio of isocyanate groups to hydroxyl groups in the prepolymer to reduce the crystallinity and softening temperature of the spandex polymer hard segment.

[0012] Preferably, the liquid carrying rate of the low-temperature pre-setting is 80-95%.

[0013] Preferably, the liquid carrying rate of the low-temperature post-setting is 75-95%.

[0014] Preferably, the anti-yellowing additive is a product of model ZX-511W provided by Zhanxing Company, the anti-phenol yellowing agent is a product of model ZX-510 provided by Zhanxing Company, the anti-phenol yellowing stabilizer is a product of model ZX-515D provided by Zhanxing Company, the softener is a quaternary ammonium softener, and the polyurethane is a product of model ZX-515 provided by Tona Trading (Shanghai) Co., Ltd. NANO PU products. The ZX-511W anti-yellowing additive effectively prevents oxidative yellowing of nylon stretch fabrics during the low-temperature pre-setting process, thereby extending the fabric's service life and maintaining its original color and performance. During the low-temperature post-setting process, the ZX-510 anti-phenol yellowing agent and ZX-515D anti-phenol yellowing stabilizer block the active amino groups of the nylon fibers in the fabric and modify the spandex surface to reduce phenol adsorption. This prevents yellowing caused by various factors, including sunlight oxidation, NOx / SOx gas reactions in the air, lignin migration from packaging cartons, precipitation of the antioxidant BHT (2,6-di-tert-butyl-p-cresol) in packaging films, and yellowing caused by alkali metal residues in the processing water. Quaternary ammonium softeners (such as dioctadecyldimethylammonium chloride) carry a positive charge and can electrostatically bind to the negative charge on the fiber surface to form a directional adsorption layer. This adsorption layer not only gives the fabric a soft feel, but also can adsorb negatively charged anti-phenol yellowing agents through charge matching to form a "softener-anti-phenol yellowing agent" complex, reducing the dissolution of anti-phenol yellowing agents during washing, and further improving the fabric's anti-phenol yellowing properties.

[0015] Compared with the prior art, the present invention has the following advantages: the dyeing and finishing method of the present invention uses a full-process collaborative process, uses low-temperature easy-setting spandex as the spandex raw material of the nylon stretch fabric, adds an anti-yellowing auxiliary agent through low-temperature pre-setting, and adds an anti-phenol yellowing agent, an anti-phenol yellowing stabilizer and a polyurethane through the three-step synergistic effect of low-temperature post-setting, so that the CIE whiteness of the nylon stretch fabric before washing is increased to more than 150, and the anti-phenol yellowing performance grade before washing reaches more than 4-5 levels, significantly improving the anti-phenol yellowing performance of the white nylon stretch fabric, which can meet the high-quality requirements of sports and outdoor clothing for textiles. The dyeing and finishing method of the present invention significantly enhances the anti-phenol yellowing washing durability of the fabric. Compared with the traditional process, the anti-phenol yellowing performance grade after washing can be increased by 1-2 levels. The dyeing and finishing method of the present invention can not only effectively improve the whiteness and brightness of the color of white and light-colored nylon stretch fabrics, but also significantly improve the yellowing problem that is prevalent in the industry, and provides a reliable solution for the long-term storage stability and anti-yellowing durability of nylon stretch fabrics and their clothing products after washing. DETAILED DESCRIPTION

[0016] The present invention is further described in detail below with reference to the examples. Raw materials, additives, processes, equipment, etc. not limited in the present invention all adopt conventional techniques in the art.

[0017] Example 1: White cotton-nylon stretch woven plain fabric, with a specific yarn count specification of CPT50*Nylon40D (20DSpandex) 230*130, and a composition of 71% cotton, 25% nylon, and 4% spandex, wherein the spandex raw material is low-temperature easy-setting spandex, and the low-temperature easy-setting spandex is a product of EASY SET LYCRA produced by INVISTA.

[0018] The process flow of the dyeing and finishing method of the white cotton nylon stretch woven plain fabric in Example 1 is as follows: fabric weaving → grey fabric inspection → grey fabric singeing → desizing → low-temperature pre-setting → refining → bleaching → low-temperature post-setting → pre-shrinking → finished product inspection, wherein the temperature of the low-temperature pre-setting is 150°C, the time is 40 seconds, the low-temperature pre-setting working solution contains: 10 g / L of anti-yellowing auxiliary agent, the pH value of the low-temperature pre-setting working solution is adjusted to 5-6 with acetic acid, and the two dipping and two rolling are performed until the liquid carrying rate of the grey fabric is 80-90%; the temperature of the low-temperature post-setting is 150°C, the time is 60 seconds, the low-temperature post-setting working solution contains: 5-10 g / L of phenolic yellowing agent, 10 g / L of anti-phenolic yellowing stabilizer, 10 g / L of softener and 5 g / L of polyurethane, the pH value of the low-temperature post-setting working solution is adjusted to 5-6 with acetic acid, and the one dipping and one rolling are performed until the liquid carrying rate of the grey fabric is about 90%.

[0019] Comparative Example 1: White cotton nylon stretch plain woven fabric. The difference from Example 1 is that the spandex raw material in Comparative Example 1 is conventional spandex lycra.

[0020] The process flow of the dyeing and finishing method of the white cotton nylon stretch woven plain fabric in Comparative Example 1 is: fabric weaving → grey fabric inspection → grey fabric singeing → desizing → high temperature presetting → refining → bleaching → tenter heat setting → finished product inspection, wherein the high temperature presetting temperature is 190°C, the time is 40s, and the high temperature presetting working solution contains only: softener 10g / L.

[0021] The key quality indicators of the white cotton nylon stretch woven plain fabrics of Example 1 and Comparative Example 1 processed by the above different dyeing and finishing methods were tested, and the specific comparative data are shown in Table 1.

[0022] Table 1: Performance comparison of white cotton nylon stretch woven plain fabrics of Example 1 and Comparative Example 1

[0023] Performance indicators Example 1 Comparative Example 1 CIE whiteness before washing 150 140 Anti-phenol yellowing performance before washing (grade) 4-5 3-4 CIE whiteness after washing 145 130 <![CDATA[ΔWI 洗前-洗后 ]]> 5 10 Anti-phenol yellowing performance after washing (grade) ≥4 2-3 Fabric elastic recovery 90％ 82％ Breaking strength (N) Warp: 620, Weft: 450 Warp: 540, Weft: 380 Tear strength (N) Warp: 32, Weft: 28 Warp: 32, Weft: 20 Fabric shrinkage (%) Warp: -2.5%, Weft: -2.0% Warp: -2.6%, Weft: -2.2%

[0024] The comparative results in Table 1 show that the dyeing and finishing method of the present invention is energy-efficient and cost-effective. According to the GB / T 8629 4N wash-and-dry test, the fabric shrinkage is -2.5% in the warp direction and -2.0% in the weft direction. The fabric has good dimensional stability after washing, reaching the dimensional stability of fabrics produced using conventional high-temperature presetting processes, and can meet and achieve the industry quality requirements for large-scale garment production (>-3% in the warp direction and >-2.5% in the weft direction). More importantly, the dyeing and finishing method of the present invention can significantly improve the whiteness of the fabric, increasing the CIE whiteness of the fabric in Comparative Example 1 from 140 before washing to 150. The whiteness change value ΔWI of the fabric after five washes is 1.5%. 洗前-洗后 =5, and the high whiteness of the fabric is durable. The dyeing and finishing method of the present invention also effectively enhances the resistance of white cotton, nylon, and stretch woven plain fabric to phenolic yellowing, significantly improving the fabric's resistance to phenolic yellowing. The fabric achieved a pre-wash resistance to phenolic yellowing of 4-5, an improvement of one level over the 3-4 levels achieved by the conventional comparative example 1. Furthermore, the fabric of the present invention achieved a very good quality grade of ≥4 after washing, surpassing the 2-3 levels achieved by the conventional comparative example 1.

[0025] Example 2: White nylon stretch woven twill fabric, the specific yarn count specification is 70D Nylon (40D Spandex) * 70DNylon (40D Spandex) 180 * 100, the composition is 74% nylon 26% spandex, wherein the spandex raw material is low temperature easy to set spandex, the low temperature easy to set spandex is produced by the Korean Hyosung Group, model eco-soft products.

[0026] The process flow of the dyeing and finishing method of the white nylon elastic woven twill fabric of Example 2 is: fabric weaving → grey fabric inspection → desizing → low-temperature presetting → refining → bleaching and fluorescent whitening → low-temperature post-setting → finished product inspection, wherein the temperature of the low-temperature pre-setting is 155°C, the time is 40s, the working solution of the low-temperature pre-setting contains: 15g / L of anti-yellowing auxiliary agent, the pH value of the low-temperature pre-setting working solution is adjusted to 5-6 with acetic acid, and the two dipping and two rolling are performed until the liquid carrying rate of the grey fabric is 70-80%; the temperature of the low-temperature post-setting is 150°C, the time is 60s, the working solution of the low-temperature post-setting contains: 8g / L of anti-phenol yellowing agent, 10g / L of anti-phenol yellowing stabilizer, 10g / L of softener and 6g / L of polyurethane, the pH value of the low-temperature post-setting working solution is adjusted to 5-6 with acetic acid, and the one dipping and one rolling are performed until the liquid carrying rate of the grey fabric is about 85%.

[0027] Comparative Example 2: White nylon stretch woven twill fabric. The difference from Example 2 is that the spandex raw material in Comparative Example 2 is conventional spandex lycra.

[0028] The process flow of the dyeing and finishing method of the white nylon stretch woven twill fabric in Comparative Example 2 is: fabric weaving → grey fabric inspection → high-temperature presetting → desizing → refining → bleaching → tenter heat setting → preshrinking → finished product inspection, wherein the high-temperature presetting temperature is 180°C, the time is 40s, and the high-temperature presetting working solution contains only 10g / L of softener.

[0029] The key quality indicators of the white cotton nylon stretch woven plain fabrics of Example 2 and Comparative Example 2 processed by the above different dyeing and finishing methods were tested, and the specific comparative data are shown in Table 2.

[0030] Table 2: Performance comparison of white nylon stretch woven twill fabrics of Example 2 and Comparative Example 2

[0031] Performance indicators Example 2 Comparative Example 2 CIE whiteness before washing 152 145 Anti-phenol yellowing performance before washing (grade) ≥4-5 3-4 CIE whiteness after washing 147 130 <![CDATA[ΔWI 洗前-洗后 ]]> 5 15 Anti-phenol yellowing performance after washing (grade) ≥4 2 Fabric elastic recovery 95％ 82％ Breaking strength (N) Warp: 520, Weft: 480 Warp: 540, Weft: 380 Tear strength (N) Warp: >32, Weft: >32 Warp: 26, Weft: 24 Fabric shrinkage (%) Warp: -2.6%, Weft: -2.2% Warp: -2.7%, Weft: -2.1%

[0032] The comparative results in Table 2 show that the dyeing and finishing method of the present invention is energy-efficient and cost-effective. According to the GB / T 8629 4N wash-and-dry test, the fabric shrinkage is -2.6% in the warp direction and -2.2% in the weft direction. The fabric has good dimensional stability after washing, reaching the dimensional stability of fabrics produced using conventional high-temperature presetting processes, and can meet and achieve the industry quality requirements for large-scale garment production (>-3% in the warp direction and >-2.5% in the weft direction). More importantly, the dyeing and finishing method of the present invention can significantly improve the whiteness of the fabric, increasing the CIE whiteness of the fabric in Comparative Example 2 from 145 before washing to 152. The whiteness change value ΔWI of the fabric after five washes is 145. 洗前-洗后 =5, significantly improving the whiteness of the fabric compared to the conventional comparative example 2. The dyeing and finishing method of the present invention also effectively enhances the resistance of the white cotton, nylon, and stretch woven plain fabric to phenolic yellowing, significantly improving the fabric's resistance to phenolic yellowing. The fabric achieved a pre-wash resistance to phenolic yellowing of ≥4-5, an improvement of more than one grade compared to the 3-4 achieved in the conventional comparative example 2. Furthermore, the fabric of the present invention maintained a very good quality resistance to phenolic yellowing of ≥4 after washing, an improvement of more than two grades compared to the conventional comparative example 2.

[0033] The comparison results of Example 1 and Comparative Example 1, as well as Example 2 and Comparative Example 2, show that the dyeing and finishing method of the present invention can significantly improve the resistance of white nylon stretch fabric to phenolic yellowing, and significantly enhance the fabric's resistance to phenolic yellowing washing durability. At the same time, the dual low-temperature setting process of low-temperature pre-setting and low-temperature post-setting adopted by the dyeing and finishing method of the present invention significantly improves the whiteness durability, elasticity, and strength of the fabric. The dyeing and finishing method of the present invention is not only applicable to white nylon stretch fabrics of various multi-component fibers, but can also be effectively applied to various light-colored nylon stretch woven fabrics. In addition, the dyeing and finishing method of the present invention is also applicable to improving the dyeing and finishing of white and light-colored knitted weft-knitted or warp-knitted nylon stretch knitted fabrics. The dyeing and finishing method of the present invention provides a unified solution for the diversified application of nylon stretch fabrics.

[0034] The anti-yellowing agent used in Examples 1 to 2 and Comparative Examples 1 to 2 is a product of model ZX-511W provided by Zhanxing Company, which has a colorless transparent liquid appearance, a pH value of 6.0 to 7.0 at a concentration of 1%, a nonionic ionicity, and is readily soluble in water; the anti-phenol yellowing agent is a product of model ZX-510 provided by Zhanxing Company, which has a light yellow transparent liquid appearance, a pH value of 4.0 to 5.0, an anionic ionicity, and is readily soluble in water; the anti-phenol yellowing stabilizer is a product of model ZX-515D provided by Zhanxing Company, which has a colorless transparent liquid appearance, a pH value of 4.5 to 6.0 at a concentration of 1%, a nonionic ionicity, and is readily soluble in water; the softener is a quaternary ammonium salt softener. In this embodiment, the softener is provided by Advanced Chemical Co., Ltd., which is Advansoft The product 8630 is a light yellow transparent liquid with a pH value of 6.0-7.0 at a concentration of 1%. It is a weakly cationic ionic agent with good high temperature resistance and acid, alkali and salt stability. It is a hydrophilic silicone softener based on block technology. The polyurethane is provided by Tona Trading (Shanghai) Co., Ltd. NANO PU products are chemically composed of modified polyether polyurethane preparatory liquid, with amphoteric ionicity (sometimes weak anionic), slightly yellow in supply state, and a density of 1.10 g / cm at 23°C. 3 The viscosity at 20℃ is about 50mPa.s, the pH value at 20℃ is 4.5-5.5, and it is easily soluble in water.

[0035] The scope of protection of the present invention is not limited to these embodiments, and any equivalent replacement and improvement based on the technical solution of the present invention shall fall within the scope of protection of the present invention. The processes, additives, raw materials, etc. not limited in the present invention are all conventional technical means in the art.

Claims

1. A dyeing and finishing method for improving the phenol yellowing resistance of white nylon stretch fabric, characterized in that: The process flow of the dyeing and finishing method includes: fabric weaving → grey fabric inspection → low-temperature pre-setting → refining → bleaching → low-temperature post-setting → finished product inspection, wherein: the spandex raw material used in the fabric weaving is low-temperature easy-setting spandex; the temperature of the low-temperature pre-setting is 150-170°C, the time is 40-60s, the low-temperature pre-setting working liquid contains: 5-15g / L of anti-yellowing auxiliary agent, and the pH value of the low-temperature pre-setting working liquid is 5-6; the temperature of the low-temperature post-setting is 140-160°C, the time is 40-60s, the low-temperature post-setting working liquid contains: 5-10g / L of anti-phenol yellowing agent, 8-12g / L of anti-phenol yellowing stabilizer, 8-12g / L of softener and 5-10g / L of polyurethane, and the pH value of the low-temperature post-setting working liquid is 5-6.

2. A dyeing and finishing method for improving the phenol yellowing resistance of white nylon stretch fabric according to claim 1, characterized in that: The low temperature easy-setting spandex is the product of EASY SET LYCRA produced by INVISTA or the product of eco-soft products.

3. A dyeing and finishing method for improving the phenol yellowing resistance of white nylon stretch fabric according to claim 1, characterized in that: The liquid carrying rate of the low-temperature pre-setting is 80-95%.

4. A dyeing and finishing method for improving the phenol yellowing resistance of white nylon stretch fabric according to claim 1, characterized in that: The liquid carrying rate of the low-temperature post-setting process is 75-95%.

5. The dyeing and finishing method for improving the phenol yellowing resistance of white nylon stretch fabric according to claim 1, characterized in that: The anti-yellowing auxiliary agent is a product of model ZX-511W provided by Zhanxing Company, the anti-phenol yellowing agent is a product of model ZX-510 provided by Zhanxing Company, the anti-phenol yellowing stabilizer is a product of model ZX-515D provided by Zhanxing Company, the softener is a quaternary ammonium softener, and the polyurethane is a product of model ZX-515 provided by Tona Trading (Shanghai) Co., Ltd. NANO PU products.