{"id":14775,"date":"2024-04-08T15:08:06","date_gmt":"2024-04-08T15:08:06","guid":{"rendered":"https:\/\/bfymold.com\/?p=14775"},"modified":"2025-03-13T07:18:00","modified_gmt":"2025-03-13T07:18:00","slug":"why-do-plastic-products-with-color-matching-fade","status":"publish","type":"post","link":"https:\/\/bfymold.com\/fr\/why-do-plastic-products-with-color-matching-fade\/","title":{"rendered":"Pourquoi les produits en plastique dont la couleur est assortie se d\u00e9colorent-ils ?"},"content":{"rendered":"\n<p id=\"u8c75bb95\">Les produits en plastique sont affect\u00e9s par divers facteurs susceptibles de provoquer une d\u00e9coloration. La d\u00e9coloration des produits de coloration en plastique est li\u00e9e \u00e0 la r\u00e9sistance \u00e0 la lumi\u00e8re, \u00e0 l&rsquo;oxyg\u00e8ne, \u00e0 la chaleur, \u00e0 l&rsquo;acide et \u00e0 l&rsquo;alcali de la poudre colorante, ainsi qu&rsquo;aux caract\u00e9ristiques de la r\u00e9sine utilis\u00e9e. <\/p>\n\n<div style=\"height:54px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<p id=\"u96c0d5e4\">Voici une analyse d\u00e9taill\u00e9e des facteurs \u00e0 l&rsquo;origine de l&rsquo;alt\u00e9ration des couleurs des plastiques :<\/p>\n\n<div style=\"height:54px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"800\" src=\"https:\/\/bfymold.com\/wp-content\/uploads\/2024\/03\/H646232853a254731858b53aaf1d6ee043.webp\" alt=\"produits en plastique\" class=\"wp-image-19043\" style=\"width:700px\" title=\"\" srcset=\"https:\/\/bfymold.com\/wp-content\/uploads\/2024\/03\/H646232853a254731858b53aaf1d6ee043.webp 800w, https:\/\/bfymold.com\/wp-content\/uploads\/2024\/03\/H646232853a254731858b53aaf1d6ee043-300x300.webp 300w, https:\/\/bfymold.com\/wp-content\/uploads\/2024\/03\/H646232853a254731858b53aaf1d6ee043-150x150.webp 150w, https:\/\/bfymold.com\/wp-content\/uploads\/2024\/03\/H646232853a254731858b53aaf1d6ee043-768x768.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\">produits en plastique<\/figcaption><\/figure>\n\n<div style=\"height:54px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<h2 class=\"wp-block-heading\" id=\"p1mMQ\">1. Solidit\u00e9 \u00e0 la lumi\u00e8re du colorant<\/h2>\n\n<div style=\"height:54px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<p id=\"u692bb35c\">La solidit\u00e9 \u00e0 la lumi\u00e8re du colorant influe directement sur la d\u00e9coloration du produit. Il est important d&rsquo;utiliser un colorant ayant un degr\u00e9 \u00e9lev\u00e9 de solidit\u00e9 \u00e0 la lumi\u00e8re (6 ou plus) pour les produits d&rsquo;ext\u00e9rieur expos\u00e9s \u00e0 une forte lumi\u00e8re, tandis que les produits d&rsquo;int\u00e9rieur peuvent utiliser des degr\u00e9s inf\u00e9rieurs (4 ou 5). <\/p>\n\n<p id=\"u8dc46130\">La r\u00e9sistance \u00e0 la lumi\u00e8re de la r\u00e9sine porteuse influe \u00e9galement sur le changement de couleur et la d\u00e9coloration apr\u00e8s irradiation aux ultraviolets. L&rsquo;ajout d&rsquo;absorbants UV et d&rsquo;autres stabilisateurs de lumi\u00e8re au m\u00e9lange-ma\u00eetre peut am\u00e9liorer la r\u00e9sistance \u00e0 la lumi\u00e8re des colorants et des produits plastiques color\u00e9s. <\/p>\n\n<div style=\"height:54px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<h2 class=\"wp-block-heading\" id=\"ZQk0e\">2. R\u00e9sistance \u00e0 la chaleur<\/h2>\n\n<div style=\"height:54px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<p id=\"ubd37f8b9\">La stabilit\u00e9 thermique des pigments thermor\u00e9sistants fait r\u00e9f\u00e9rence \u00e0 leur comportement aux temp\u00e9ratures de traitement en termes de perte de poids, de d\u00e9coloration et d&rsquo;alt\u00e9ration.<\/p>\n\n<p id=\"u62094ece\">Les pigments inorganiques pr\u00e9sentent une bonne stabilit\u00e9 thermique en raison de leur composition en oxyde m\u00e9tallique, tandis que les compos\u00e9s organiques peuvent subir des modifications de leur structure mol\u00e9culaire \u00e0 certaines temp\u00e9ratures. <\/p>\n\n<p id=\"u62094ece\">Lors de la s\u00e9lection des colorants pour les produits en PP, PA et PET trait\u00e9s \u00e0 plus de 280\u2103, il convient de pr\u00eater attention \u00e0 la r\u00e9sistance \u00e0 la chaleur du pigment et \u00e0 sa tol\u00e9rance au temps dans cette plage de temp\u00e9rature (g\u00e9n\u00e9ralement de 4 \u00e0 10 minutes).<\/p>\n\n<div style=\"height:54px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<figure class=\"wp-block-image aligncenter size-large is-resized\"><img decoding=\"async\" width=\"1024\" height=\"1018\" src=\"https:\/\/bfymold.com\/wp-content\/uploads\/2024\/09\/Hdd750ac1cd4c4641bb44b63e02252269E-1024x1018.jpg\" alt=\"Produits en plastique\" class=\"wp-image-4164\" style=\"width:516px;height:auto\" title=\"\" srcset=\"https:\/\/bfymold.com\/wp-content\/uploads\/2024\/09\/Hdd750ac1cd4c4641bb44b63e02252269E-1024x1018.jpg 1024w, https:\/\/bfymold.com\/wp-content\/uploads\/2024\/09\/Hdd750ac1cd4c4641bb44b63e02252269E-300x298.jpg 300w, https:\/\/bfymold.com\/wp-content\/uploads\/2024\/09\/Hdd750ac1cd4c4641bb44b63e02252269E-150x150.jpg 150w, https:\/\/bfymold.com\/wp-content\/uploads\/2024\/09\/Hdd750ac1cd4c4641bb44b63e02252269E-768x764.jpg 768w, https:\/\/bfymold.com\/wp-content\/uploads\/2024\/09\/Hdd750ac1cd4c4641bb44b63e02252269E-1536x1528.jpg 1536w, https:\/\/bfymold.com\/wp-content\/uploads\/2024\/09\/Hdd750ac1cd4c4641bb44b63e02252269E-2048x2037.jpg 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">Produits en plastique<\/figcaption><\/figure>\n\n<div style=\"height:54px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<h2 class=\"wp-block-heading\" id=\"lc4oL\">3. Propri\u00e9t\u00e9s antioxydantes<\/h2>\n\n<div style=\"height:54px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<p id=\"ud871cb7d\">Certains pigments organiques se d\u00e9gradent par des processus d&rsquo;oxydation conduisant \u00e0 une d\u00e9coloration progressive dans des conditions de temp\u00e9rature \u00e9lev\u00e9e ou d&rsquo;exposition \u00e0 des oxydants puissants tels que le chromate dans le jaune de chrome.<\/p>\n\n<div style=\"height:54px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<h2 class=\"wp-block-heading\" id=\"xiJfW\">4. R\u00e9sistance aux acides et aux alcalins<\/h2>\n\n<div style=\"height:54px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<p id=\"ua354f2f7\">La r\u00e9sistance chimique (r\u00e9sistance \u00e0 l&rsquo;acide et \u00e0 l&rsquo;alcali) des agents colorants joue un r\u00f4le dans la d\u00e9coloration du produit ; par exemple, le rouge de chrome molybd\u00e8ne r\u00e9siste \u00e0 l&rsquo;acide dilu\u00e9 mais est sensible \u00e0 l&rsquo;alcali, tandis que le jaune de cadmium ne r\u00e9siste pas \u00e0 l&rsquo;acide.<\/p>\n\n<p id=\"u8cac8b6e\">Pour r\u00e9soudre les probl\u00e8mes li\u00e9s \u00e0 la d\u00e9coloration des plastiques color\u00e9s, il convient de proc\u00e9der \u00e0 une \u00e9valuation compl\u00e8te des pigments, des colorants, des agents tensioactifs, des dispersants, des r\u00e9sines porteuses et des additifs antivieillissement n\u00e9cessaires, en fonction des conditions de traitement et des exigences d&rsquo;utilisation des produits en plastique.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Les produits en plastique sont affect\u00e9s par divers facteurs susceptibles de provoquer une d\u00e9coloration. La d\u00e9coloration des produits de coloration en plastique est li\u00e9e \u00e0 la r\u00e9sistance \u00e0 la lumi\u00e8re, \u00e0 l&rsquo;oxyg\u00e8ne, \u00e0 la chaleur, \u00e0 l&rsquo;acide et \u00e0 l&rsquo;alcali de la poudre colorante, ainsi qu&rsquo;aux caract\u00e9ristiques de la r\u00e9sine utilis\u00e9e. Voici une analyse d\u00e9taill\u00e9e [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":7278,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_eb_attr":"","_sitemap_exclude":false,"_sitemap_priority":"","_sitemap_frequency":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[49],"tags":[],"class_list":["post-14775","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"_links":{"self":[{"href":"https:\/\/bfymold.com\/fr\/wp-json\/wp\/v2\/posts\/14775","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/bfymold.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/bfymold.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/bfymold.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/bfymold.com\/fr\/wp-json\/wp\/v2\/comments?post=14775"}],"version-history":[{"count":0,"href":"https:\/\/bfymold.com\/fr\/wp-json\/wp\/v2\/posts\/14775\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/bfymold.com\/fr\/wp-json\/wp\/v2\/media\/7278"}],"wp:attachment":[{"href":"https:\/\/bfymold.com\/fr\/wp-json\/wp\/v2\/media?parent=14775"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bfymold.com\/fr\/wp-json\/wp\/v2\/categories?post=14775"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bfymold.com\/fr\/wp-json\/wp\/v2\/tags?post=14775"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}