{"id":2073,"date":"2024-05-20T22:12:00","date_gmt":"2024-05-20T14:12:00","guid":{"rendered":"https:\/\/www.wlhtex.com\/en\/?p=2073"},"modified":"2024-05-31T22:38:18","modified_gmt":"2024-05-31T14:38:18","slug":"key-points-of-dyeing-and-finishing-process-of-polyester-stretchable-fabric","status":"publish","type":"post","link":"https:\/\/www.wlhtex.com\/en\/key-points-of-dyeing-and-finishing-process-of-polyester-stretchable-fabric\/","title":{"rendered":"Key Points Of Dyeing And Finishing Process Of Polyester Stretchable Fabric"},"content":{"rendered":"\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-ht7fz-4b8e07d502743e2be440c07b21a277be\">\n#top .av-special-heading.av-ht7fz-4b8e07d502743e2be440c07b21a277be{\npadding-bottom:10px;\n}\nbody .av-special-heading.av-ht7fz-4b8e07d502743e2be440c07b21a277be .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n.av-special-heading.av-ht7fz-4b8e07d502743e2be440c07b21a277be .av-subheading{\nfont-size:15px;\n}\n<\/style>\n<div  class='av-special-heading av-ht7fz-4b8e07d502743e2be440c07b21a277be av-special-heading-h1 blockquote modern-quote modern-centered  avia-builder-el-0  el_before_av_hr  avia-builder-el-first '><h1 class='av-special-heading-tag'  itemprop=\"headline\"  >Key Points Of Dyeing And Finishing Process Of Polyester Stretchable Fabric<\/h1><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-lnh3or9j-d7fc244455bb9ae2b76358c61af57dc2\">\n#top .hr.av-lnh3or9j-d7fc244455bb9ae2b76358c61af57dc2{\nmargin-top:10px;\nmargin-bottom:10px;\n}\n.hr.av-lnh3or9j-d7fc244455bb9ae2b76358c61af57dc2 .hr-inner{\nwidth:50px;\nborder-color:#e94a3f;\n}\n<\/style>\n<div  class='hr av-lnh3or9j-d7fc244455bb9ae2b76358c61af57dc2 hr-custom  avia-builder-el-1  el_after_av_heading  el_before_av_one_full  hr-center hr-icon-no'><span class='hr-inner inner-border-av-border-fat'><span class=\"hr-inner-style\"><\/span><\/span><\/div>\n<div  class='flex_column av-911hz-eba90edf771de018f3b9617a0d88ef53 av_one_full  avia-builder-el-2  el_after_av_hr  el_before_av_social_share  first flex_column_div  '     ><p>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-lnh2tjan-77f952852aad78f2709ceea99e6b4e55\">\n@keyframes av_boxShadowEffect_av-lnh2tjan-77f952852aad78f2709ceea99e6b4e55 {\n0%   { box-shadow:  0 0 0 0 ; opacity: 1; }\n100% { box-shadow:  0 0 6px 0 ; opacity: 1; }\n}\n.avia-image-container.av-lnh2tjan-77f952852aad78f2709ceea99e6b4e55 img.avia_image{\nbox-shadow: 0 0 6px 0 ;\n}\n.avia-image-container.av-lnh2tjan-77f952852aad78f2709ceea99e6b4e55 .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-lnh2tjan-77f952852aad78f2709ceea99e6b4e55 av-styling- avia_animated_image av-animated-when-visible-95 fade-in avia-align-center  avia-builder-el-3  el_before_av_textblock  avia-builder-el-first  av-img-box-shadow av-box-shadow-not-animated'   itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><img decoding=\"async\" class='wp-image-2074 avia-img-lazy-loading-not-2074 avia_image shadow-not-animated' src=\"https:\/\/www.wlhtex.com\/en\/wp-content\/uploads\/sites\/2\/2024\/05\/KEY-POINTS-OF-DYEING-AND-FINISHING-PROCESS-OF-POLYESTER-STRETCHABLE-FABRIC.jpg\" alt='Key Points Of Dyeing And Finishing Process Of Polyester Stretchable Fabric' title='KEY POINTS OF DYEING AND FINISHING PROCESS OF POLYESTER STRETCHABLE FABRIC'  height=\"430\" width=\"1500\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/www.wlhtex.com\/en\/wp-content\/uploads\/sites\/2\/2024\/05\/KEY-POINTS-OF-DYEING-AND-FINISHING-PROCESS-OF-POLYESTER-STRETCHABLE-FABRIC.jpg 1500w, https:\/\/www.wlhtex.com\/en\/wp-content\/uploads\/sites\/2\/2024\/05\/KEY-POINTS-OF-DYEING-AND-FINISHING-PROCESS-OF-POLYESTER-STRETCHABLE-FABRIC-300x86.jpg 300w, https:\/\/www.wlhtex.com\/en\/wp-content\/uploads\/sites\/2\/2024\/05\/KEY-POINTS-OF-DYEING-AND-FINISHING-PROCESS-OF-POLYESTER-STRETCHABLE-FABRIC-1030x295.jpg 1030w, https:\/\/www.wlhtex.com\/en\/wp-content\/uploads\/sites\/2\/2024\/05\/KEY-POINTS-OF-DYEING-AND-FINISHING-PROCESS-OF-POLYESTER-STRETCHABLE-FABRIC-768x220.jpg 768w, https:\/\/www.wlhtex.com\/en\/wp-content\/uploads\/sites\/2\/2024\/05\/KEY-POINTS-OF-DYEING-AND-FINISHING-PROCESS-OF-POLYESTER-STRETCHABLE-FABRIC-705x202.jpg 705w\" sizes=\"(max-width: 1500px) 100vw, 1500px\" \/><\/div><\/div><\/div><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-lnh2psfd-5c6e5832cc063245ed4d709dd6d8a973\">\n#top .av_textblock_section.av-lnh2psfd-5c6e5832cc063245ed4d709dd6d8a973 .avia_textblock{\ntext-align:justify;\n}\n<\/style>\n<section  class='av_textblock_section av-lnh2psfd-5c6e5832cc063245ed4d709dd6d8a973 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><p>The dyeing and finishing process of polyester spandex warp knitted elastic fabric should mainly focus on the characteristics of spandex yarn and solve the problem of adding more oil agent to spandex yarn in the spinning process. This article takes the example of the polyester spandex warp knitted faabric with 44dtex polyester filament yarn and 44dtex spandex, with the density of 160-220g\/m2, and introduces the process and key points of the dyeing and finishing process.<\/p>\n<p><strong>1. Dyeing and finishing process<\/strong><br \/>\nUnwinding greige fabric &#8211; preshrinking (dry cleaning or washing) &#8211; preshaping &#8211; dyeing &#8211; finished product reshaping &#8211; inspection &#8211; packaging.<\/p>\n<p><strong>2. Pre-treatment<\/strong><br \/>\nThe purpose of pre-treatment is to make the fabric fully relaxed and pre-shrink, eliminate the residual stress inside the fabric, especially the spandex yarn fully retracted, reduce or eliminate the difference of surface density and density inside and outside\uff0con the left, middle and right. At the same time, remove the large amount of fiber oil agent on polyester and spandex yarn, and the oil or other stains on the fabric during the knitting process, in order to facilitate the subsequent work.<\/p>\n<p>Polyester spandex fabric washing process has two kinds of process including laundering and dry cleaning. At present, the mainly adopted process is laundering.Laundry equipment is more cost-effective, with prices about one-third of dry cleaning equipment, and the efficiency of laundering is 15-20% higher than dry cleaning. There are a wider variety of stains that can be washed by washing than by dry cleaning, such as sweat stains when carrying greige fabrics. And dry cleaning is more capable of cleaning oil stains. Water washing uses more water, while dry cleaning is more polluting to the environment. Greige fabrics need to be pre-shaped immediately after washing, otherwise they may create creases in the fabric.<\/p>\n<p><strong>3. Predefinition<\/strong><br \/>\nIn polyester\/spandex warp-knitted fabrics, spandex yarns are wrapped inside the fabric by polyester yarns, so they can be thermally shaped like polyester. Generally, it can withstand a relatively quick dry heat treatment of up to 190\u2103.<\/p>\n<p>The polyester spandex stretch fabric is dipped before preshaping. The purpose is to eliminate the color streaks in the dyeing as much as possible through the antioxidant treatment of the anti-yellowing agent GR.Penetrating agent and defoamer can be added as needed. The pre-shape process condition is generally at 190\u2103 and the speed is l9-21m\/min. The shaping machine employs l0 sections of ovens, with the first 4 sections at low temperature for pre-drying area, which can be set at 160\u2103, 160\u2103, 170\u2103 and 170\u2103 respectively; the temperature of the last 4 sections of ovens is set at 190\u2103 and the temperature of the last 2 sections of ovens is set at 180\u2103. Generally the lower air volume of the shaping machine should be larger than the upper air volume, in order that the fabric surface does not touch either the upper air vent or the lower air vent. The width is generally around 155.2cm; the tension is around 14.7N; the overfeed is around 10%.<\/p>\n<p>The above process parameters should be appropriately adjusted according to the specifications and actual conditions of the greigefabric during production.<\/p>\n<p><strong>4. Dyeing<\/strong><br \/>\nThe polyester spandex stretch warp knitted fabric is generally dyed with disperse dyes in high temperature and high pressure overflow dyeing machine, while the dyeing equipment of nylon spandex stretch plain warp knitted fabric commonly use room temperature rope dyeing machine as well as warp dyeing machine. Considering the influence of temperature on the elasticity, the dyeing temperature is generally set as follows: 120\u2103 for light color, 125\u2103 for medium and dark color, 80\u2103 for reductive cleaning, 40-60min for preservation time, and 1\u2103\/min for lifting temperature rate.<\/p>\n<p>Since the optimal pH value for disperse dyeing is 4.5-5.5, the pH value of the bath is 5.0-6.0 because the disperse dyes are unstable and have poor diffusion performance at pH 7 or higher, and are prone to color blooms and tar spots.<\/p>\n<p><strong>5. Reshaping<\/strong><br \/>\nWhen polyester spandex stretch fabric is reshaped, the general temperature used is 180\u2103, speed at 32-35m\/min. The first 4 sections of the oven temperature is low, as a pre-drying area, can be set to 170\u2103; and the last 4 sections of the oven temperature is set to 180\u2103. Tension is generally set at 29.4-34.3N. The temperature of nylon spandex fabric is 160\u2103, and the speed is basically the same as that of polyester spandex fabric.The process parameters should be adjusted according to the fabric specifications and actual conditions.<\/p>\n<p>In addition, compared with nylon, due to less polyester shrinkage than nylon, to get the same finished surface density, such as 200g\/m2, polyester stretch fabric generally have to do 195-196g\/m2, while the nylon stretch fabric to do 193-194g\/m2.<\/p>\n<\/div><\/section><\/p><\/div><div  class='av-social-sharing-box av-lnh2yd8u-a482ec29b892f39913cdc0667ea95e1f av-social-sharing-box-default  avia-builder-el-5  el_after_av_one_full  avia-builder-el-last  av-social-sharing-box-fullwidth'><div class=\"av-share-box\"><h5 class='av-share-link-description av-no-toc '>Share this entry<\/h5><ul class=\"av-share-box-list noLightbox\"><li class='av-share-link av-social-link-facebook' ><a target=\"_blank\" aria-label=\"Share on Facebook\" 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