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\n Shenghong Group Zhang Jianguo Qian Qinfang Wu Zhonghua Chen Ting<\/p>\n
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\n Nylon fiber has excellent strength and wear resistance, with a moisture regain of 4.5% to 7%. The fabric feels soft, light and comfortable to wear, and has good wearing properties. It occupies an important position among synthetic fibers. In recent years, with the development of superfine fibers, the added value of nylon and nylon blended fabrics has been greatly improved, such as lightness and comfort. They are especially suitable for making outdoor sports fabrics, such as mountaineering suits, swimsuits, etc. <\/p>\n
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\n High-density nylon fiber fabrics are pre-processed by cold padding; when preformed at 185\u00b0C, 20g\/L anti-yellowing agent RUCOGEN NOX is added; dyed with acid dyes, anti-UV finishing agent CEL is added; when water- and oil-proof post-finishing, an appropriate amount of RUCOGEN NOX is added The joint agent CA-A-01 is added to improve its durability; and a certain pressure calendering treatment is performed to improve its resistance to diamond lining. By analyzing various factors of the process, relevant precautions are put forward. The high-density nylon fiber fabric produced by this process has a soft feel and soft luster. It has super water-repellent and washability, anti-ultraviolet and anti-drying properties, which increases the added value of the product. <\/p>\n
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\n Foreword<\/b><\/p>\n
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\n Nylon fiber has excellent strength and wear resistance, with a moisture regain of 4.5% to 7%. The fabric feels soft, light and comfortable to wear, and has good wearing properties. It occupies an important position among synthetic fibers. In recent years, with the development of superfine fibers, the added value of nylon and nylon blended fabrics has been greatly improved, such as lightness and comfort. They are especially suitable for making outdoor sports fabrics, such as mountaineering suits, swimsuits, etc. <\/p>\n
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\n Apply waterproof, oil-proof and anti-fouling finishing agents to nylon fabrics to change the surface properties of the fabric (reduce the surface tension of the fabric), thereby obtaining effects such as anti-contamination and easy decontamination; through calendering post-treatment, the fabric’s resistance to corrosion can be further improved. Improved velvet properties to better apply to down jacket fabrics. <\/p>\n
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\n This article briefly introduces the functions of outdoor sports fabrics, such as the development of super water-repellent, UV-resistant and windproof products. <\/p>\n
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\n 1. Process flow and testing methods<\/b><\/p>\n
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\n 1.1 Fabric<\/p>\n
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\n Fabric: Fully matted FDY 22.2 dtex\/24 f nylon filament (sizing) \u00d7 fully matted FDY 22.2 dtex\/24 f nylon filament 770 strands\/lOcm\u00d7740 strands\/10cm, 162cm, 55g\/m2 (plain weave in Tsudakoma Weaving on series water-jet looms). <\/p>\n
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\n 1.2 Process flow<\/p>\n
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\n Unwinding and seaming\u2192Desizing pre-treatment (cold stack, open-width desizing and washing)\u2192Pre-forming\u2192Dyeing (anti-UV finishing, ultra-waterproof nanomaterial pre-treatment)\u2192Color fixation\u2192Dehydration\u2192Opening\u2192Post-finishing (baking Dry, waterproof stenter setting) \u2192 calendering, inspection, fabric coding and packaging. <\/p>\n
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\n 1.3 Test method<\/p>\n
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\n (1) Water repellency is measured using the YH286 fabric moisture meter according to AATCC 22-2005 “Spray Method for Testing Water Repellency of Textiles”; <\/p>\n
\n (2) Oil repellency: According to AATCC 11.8-1997 “Oil Repellency: Hydrocarbon Resistance Test”, the oil repellency of the fabric is measured; <\/p>\n
\n (3) Breaking strength is measured according to the method of GB\/T 3923.1-1997 “Textile Fabric Tensile Properties Part 1 Determination of Breaking Strength and Breaking Elongation”; <\/p>\n
\n (4) Tear strength is measured according to the method of GB\/T3917.2-2009 “Tear Properties of Textile Fabrics Part 2: Pants Type Samples (Determination of Single Seam Tear Strength”; <\/p>\n
\n (5) Seam slippage is measured according to GB\/T13772.2-2008 “Determination of yarn resistance to slippage at seams of textile woven fabrics – Part 2 Constant load method”; <\/p>\n
\n (6) Washing resistance is measured according to AATCC 135-2010 “Dimensional changes in fabrics during home washing”; <\/p>\n
\n (7) Air permeability is based on GB\/T5453-1997 “Testing of Air Permeability of Textile Fabrics”. Measure 10 times on different parts of each sample and take the average value; <\/p>\n
\n (8) Rubbing fastness According to GB\/T3920-1997 Textile Color Fastness Test and Rubbing Color Fastness”, use the Y507L rubbing fastness meter to measure the rubbing fastness before and after color fixation; <\/p>\n
\n (9) The UV protection performance is measured according to GB\/T18830 “Evaluation of UV Protection Performance of Textiles”; <\/p>\n
\n (10) Color fastness to washing is in accordance with IS0105\/C06: 2010 “Textiles Color Fastness Test Part C06: Color Fastness to Domestic and Commercial Laundering.” A2S\u300bMeasurement;<\/p>\n
\n (11) Color fastness to perspiration is measured according to IS0105\/E04: 2008 “Textiles Color Fastness Test Part E04: Color Fastness to Perspiration”: <\/p>\n
\n (12) The lint resistance is measured according to GB\/T12705.1-2009 “Test Methods for Anti-Drilling Properties of Textile Fabrics Part 1: Friction Method”. <\/p>\n
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\n 2. Discussion on dyeing and finishing technology<\/b><\/p>\n
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\n 2.1 Pre-treatment of desizing<\/p>\n
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\n 2.1.1 Cold pile<\/p>\n
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\n Our factory uses cold stack technology + high-efficiency open-width desizing and washing for pre-treatment. <\/p>\n
\n Process prescription\/(g.L-1):<\/p>\n
\n Liquid caustic soda 100<\/p>\n
\n Degreaser TF-115C5<\/p>\n
\n Four-in-one scouring agent TF-1705<\/p>\n
\n Liquid carrying rate\/%30<\/p>\n
\n Temperature\/\u210324<\/p>\n
\n Time\/h36<\/p>\n
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\n 2.1.2 Efficient water washing<\/p>\n
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\n Generally, nylon fabric weaving slurry contains silicone oil lubricant, which needs to be treated before degreasing. If the gray fabric is not degreased, the silicone oil will be cross-linked during high-temperature setting and adsorbed on the nylon yarn, which will seriously hinder the dyeing of acid dyes during dyeing, resulting in dyeing. <\/p>\n
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\n In the pre-treatment tank of the open-width desizing machine, additives for desizing, emulsification, and preventing the slurry (oil, wax) from being stained back are added to the pre-treatment tank of the open-width desizing machine, and with the help of the high-frequency ultrasonic oscillation function of the water washing tank, the cold stack is completed. The gray fabric is washed with water to remove the slurry, oil and impurities that have been degraded, saponified, emulsified and alkali hydrolyzed on the fabric during the cold stacking process, thereby accelerating the chemical degradation of oxidation products and alkali hydrolysis to prepare for subsequent dyeing. <\/p>\n
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\n Treatment technology\/(g.L-1):<\/p>\n
\n Oxidation desizing agent TF-127K5<\/p>\n
\n Chelating dispersant TF-188A2<\/p>\n
\n Degreaser TF-1262<\/p>\n
\n Liquid caustic soda 20<\/p>\n
\n Temperature\/\u210398<\/p>\n
\n Vehicle speed\/(m.mm-1)80<\/p>\n
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\n 2.2 Preforming<\/p>\n
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\n Nylon fiber has a high degree of crystallinity. Through pre-shaping, the arrangement of the crystalline and amorphous areas can be ordered, reducing or eliminating the uneven stress produced by the nylon fiber during spinning, drafting and weaving processes, which is effective Improve dyeing uniformity. Pre-shaping can also improve the flatness and wrinkle resistance of the fabric surface, reduce the wrinkles and fabric shrinkage wrinkles caused by the fabric during dyeing, and increase the dimensional stability of the fabric in subsequent processing. However, the elasticity of nylon fabrics will be damaged under high temperature conditions, and the terminal amino groups are easily oxidized (acid dye chromophore groups), destroying the dyeing properties of nylon fabrics. Therefore, during preshaping, 20g\/L anti-yellowing agent RUCOGEN NOX was used to pad the white nylon fabric. <\/p>\n
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\n Table l RUCOGENNOX anti-high temperature yellowing effect<\/p>\n
| \n \n Results<\/p>\n \n<\/td>\n | \n \n Unformed<\/p>\n \n<\/td>\n | \n \n Use anti-yellowing agents<\/p>\n \n 190\u2103 setting 60s<\/p>\n<\/td>\n | \n \n No anti-yellowing agents are used<\/p>\n \n 190\u2103 setting 60s<\/p>\n<\/td>\n<\/tr>\n | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| \n \n Whiteness<\/p>\n<\/td>\n | \n \n 82.03<\/p>\n<\/td>\n | \n \n 79.3<\/p>\n<\/td>\n | \n \n 40.23<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n \n \n During pre-shaping, 20g\/L anti-yellowing agent RUCOGEN NOX is used to pad the nylon fabric. Different pre-shaping temperatures have an impact on the coloring rate and tearing strength. <\/p>\n \n \n The anti-yellowing finishing agent RUCOGEN NOX is a polymer compound that contains various types of antioxidant active groups on the molecular chain. The active groups generated by its decomposition under high temperature conditions can capture the degradation of nylon fabrics under high temperature conditions. free radicals, cutting off the free radical chain reaction, thereby preventing the formation of conjugated colored compounds and reducing the yellowing of nylon fabrics under high temperature conditions. <\/p>\n \n \n As can be seen from Table 1, direct high-temperature setting without anti-yellowing finishing, the whiteness of the cloth surface is greatly reduced; while using high-temperature anti-yellowing agent RUCOGEN NOX, the yellowing phenomenon of the cloth surface is significantly reduced, which shows that the anti-yellowing agent It has a good protective effect on fiber. <\/b><\/p>\n \n \n The preforming process is determined as follows: <\/p>\n \n Anti-yellowing agent RUCOGEN NOX\/\uff08g.L-1\uff0920<\/p>\n \n pH adjuster RUCO-ACID ABS\/\uff08g.L-1\uff092<\/p>\n \n Liquid padding rate\/%30<\/p>\n \n Temperature\/\u2103180<\/p>\n \n Vehicle speed\/(m.min-1)60<\/p>\n \n \n 2.3 Dyeing and UV-resistant finishing<\/p>\n \n \n 2.3.1 Dyeing<\/p>\n \n \n Nylon products are usually processed in weakly acidic dye bathsIn dyeing, leveling is achieved by controlling process parameters such as leveling agent, dyeing temperature, heating rate, and pH value of the dye liquor. In order to improve the water-repellent, oil-repellent and anti-fouling properties of fabrics, the anionic additive ECO-EVER (containing dispersant) is added during the dyeing process. This additive is a polymer nanomaterial. With the help of the dispersant during dyeing, the nanoparticles can be highly dispersed between yarns, between fibers and on the fiber surface. In the post-finishing waterproofing process, the anionic additive ECO-EVER and the organic fluorine resin form a thin and dense film on the fiber surface to prevent further penetration of oil stains, greatly improving the water-repellent, oil-repellent, anti-fouling properties and durability. Washability. <\/p>\n \n \n Nylon fabrics generally have poor UV resistance, so UV absorber CEL can be added during dyeing. This additive has strong selective absorption of ultraviolet rays and can convert energy to reduce its transmission and improve fabric quality. <\/p>\n \n \n Take dark brown as an example<\/p>\n \n Process prescription: <\/p>\n \n A)<\/p>\n \n Glacial acetic acid\/(g.L-1)1.5<\/p>\n \n Anti-UV absorber CEL\/% (omf)4<\/p>\n \n ECO-EVER\/% (omf)5<\/p>\n \n Acid leveling agent TF-217F\/(g\/L-1)2<\/p>\n \n B)<\/p>\n \n Acid navy blue M-R (Ya Yun)\/%(omf)1.35<\/p>\n \n Acid Yellow M-2R (Ya Yun)\/%(omf)3.35<\/p>\n \n Acidic sauce red M-B (Yayun)\/%(omf)1.15<\/p>\n \n C)<\/p>\n \n Anionic color fixing agent NBS (Tona)\/(g.L-1)2<\/p>\n \n Glacial acetic acid\/(g.L-1)2<\/p>\n \n pH value 4\uff5e4.5<\/p>\n \n \n 2.3.2 Color fixation<\/p>\n \n \n In order to improve the wet treatment fastness of nylon fabrics dyed with acid dyes, the anionic color-fixing agent NBS was used to fix the color of nylon-dyed fabrics (brown). The effect of the dosage of anionic color fixing agent NBS on color fastness performance is shown in Tables 2 to 5. <\/p>\n \n \n Table 2 Effect of the dosage of anionic fixative NBS on rubbing fastness<\/p>\n
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