{"id":15411,"date":"2024-09-22T08:54:29","date_gmt":"2024-09-22T05:24:29","guid":{"rendered":"https:\/\/imenpol.com\/blog\/en\/?p=15411"},"modified":"2024-12-30T15:27:18","modified_gmt":"2024-12-30T11:57:18","slug":"air-filter-foam-system","status":"publish","type":"post","link":"https:\/\/imenpol.com\/blog\/en\/educational\/air-filter-foam-system\/","title":{"rendered":"Air filter foam system"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"15411\" class=\"elementor elementor-15411\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-61edf14 e-flex e-con-boxed e-con e-parent\" data-id=\"61edf14\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-7191e04 content-table elementor-toc--minimized-on-tablet elementor-widget elementor-widget-table-of-contents\" data-id=\"7191e04\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;headings_by_tags&quot;:[&quot;h2&quot;,&quot;h3&quot;],&quot;container&quot;:&quot;.table-contents&quot;,&quot;exclude_headings_by_selector&quot;:[],&quot;marker_view&quot;:&quot;numbers&quot;,&quot;no_headings_message&quot;:&quot;No headings were found on this page.&quot;,&quot;minimize_box&quot;:&quot;yes&quot;,&quot;minimized_on&quot;:&quot;tablet&quot;,&quot;hierarchical_view&quot;:&quot;yes&quot;,&quot;min_height&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;min_height_tablet&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;min_height_mobile&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]}}\" data-widget_type=\"table-of-contents.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-toc__header\">\n\t\t\t\t\t\t<h6 class=\"elementor-toc__header-title\">\n\t\t\t\tTable of contents\t\t\t<\/h6>\n\t\t\t\t\t\t\t\t\t\t<div class=\"elementor-toc__toggle-button elementor-toc__toggle-button--expand\" role=\"button\" tabindex=\"0\" aria-controls=\"elementor-toc__7191e04\" aria-expanded=\"true\" aria-label=\"Open table of contents\"><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-down\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M207.029 381.476L12.686 187.132c-9.373-9.373-9.373-24.569 0-33.941l22.667-22.667c9.357-9.357 24.522-9.375 33.901-.04L224 284.505l154.745-154.021c9.379-9.335 24.544-9.317 33.901.04l22.667 22.667c9.373 9.373 9.373 24.569 0 33.941L240.971 381.476c-9.373 9.372-24.569 9.372-33.942 0z\"><\/path><\/svg><\/div>\n\t\t\t\t<div class=\"elementor-toc__toggle-button elementor-toc__toggle-button--collapse\" role=\"button\" tabindex=\"0\" aria-controls=\"elementor-toc__7191e04\" aria-expanded=\"true\" aria-label=\"Close table of contents\"><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-up\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M240.971 130.524l194.343 194.343c9.373 9.373 9.373 24.569 0 33.941l-22.667 22.667c-9.357 9.357-24.522 9.375-33.901.04L224 227.495 69.255 381.516c-9.379 9.335-24.544 9.317-33.901-.04l-22.667-22.667c-9.373-9.373-9.373-24.569 0-33.941L207.03 130.525c9.372-9.373 24.568-9.373 33.941-.001z\"><\/path><\/svg><\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<div id=\"elementor-toc__7191e04\" class=\"elementor-toc__body\">\n\t\t\t<div class=\"elementor-toc__spinner-container\">\n\t\t\t\t<svg class=\"elementor-toc__spinner eicon-animation-spin e-font-icon-svg e-eicon-loading\" aria-hidden=\"true\" viewBox=\"0 0 1000 1000\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M500 975V858C696 858 858 696 858 500S696 142 500 142 142 304 142 500H25C25 237 238 25 500 25S975 237 975 500 763 975 500 975Z\"><\/path><\/svg>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-62d24ad  table-contents e-flex e-con-boxed e-con e-parent\" data-id=\"62d24ad\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a6889dc elementor-widget elementor-widget-text-editor\" data-id=\"a6889dc\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>In the past, in order to produce sealing devices in various applications, Natural Rubber was the only choice of manufacturers as the main material for these products. But silicones with their different features were able to enter in this industry. In the following, due to the particular properties of polyurethane, this type of material was also used in the manufacturer of sealing devices.<\/p><p>Polyurethane foams with high density are commonly used in producing sealing devices such as gaskets and other applications. Sealing devices that produced from this type of materials are often used in the environments near to combustion engines, and one of these products is the foam used in automobile air filters.<\/p><p>Different materials like silicones and polyurethanes are used to produce sealing devices. These products can be manufactured in different ways such as: water jet cut, die cut, molding and etc.<\/p><p>Air filter foam is one of the microcellular foams designed to contain millions of tiny bubbles in the size of less than 50 microns. By adding gas (blowing agent) into polyurethane system, the nucleation process results in the formation of these tiny bubbles and also the product density can be changed by varying the blowing agent.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-2433c86 e-flex e-con-boxed e-con e-parent\" data-id=\"2433c86\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-8a08de9 elementor-widget elementor-widget-image\" data-id=\"8a08de9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"310\" height=\"145\" src=\"https:\/\/imenpol.com\/blog\/en\/wp-content\/uploads\/sites\/2\/2024\/09\/air-filter-foam.png\" class=\"attachment-full size-full wp-image-15413\" alt=\"Air filter foam system\" srcset=\"https:\/\/imenpol.com\/blog\/en\/wp-content\/uploads\/sites\/2\/2024\/09\/air-filter-foam.png 310w, https:\/\/imenpol.com\/blog\/en\/wp-content\/uploads\/sites\/2\/2024\/09\/air-filter-foam-300x140.png 300w\" sizes=\"(max-width: 310px) 100vw, 310px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-b9639d5  table-contents e-flex e-con-boxed e-con e-parent\" data-id=\"b9639d5\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b019247 elementor-widget elementor-widget-text-editor\" data-id=\"b019247\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h2><strong>Advantages of using polyurethane in manufacturing of automobile air filter foam<\/strong><\/h2><p>Polyurethane elastomeric foams have two important properties simultaneously:<\/p><ul><li>high elasticity with excellent mechanical strength<\/li><li>good flexibility at high and low temperatures<\/li><\/ul><p>The hardness of this material customizable. In addition, polyurethanes are highly resistant to abrasion and crack growth, and they also resistant to ozone, oxidation and petroleum products. Polyurethane foams have wide range of temperatures, that for standard materials is between -40 to 100 \u00b0 C.<\/p><p>Since this product is generally used in high temperature environments, it is required to be able to withstand high temperatures for a long time without losing its physical and mechanical properties. Therefore, these foams must have dimensional stability under such conditions, which led to their use as PVC in the car air filter gasket. Another important feature is called compression set, meaning that the test sample must have a minimum deformation under constant pressure and heat over a period of time. The material that used as gasket in car air filter foam, is a high density flexible polyurethane material with a free rise density in the range of 250-550 kg\/m3, it also has tiny and uniform cells. Another desirable feature of this type of polyurethane foam is the exothermic reaction between polyol and isocyanate, where the foaming and curing operation is carried out without need to apply heat. As mentioned, air filter foam has good tensile properties with elongation at break of 100%, while having desirable tensile strength as well as tear strength.<\/p><p>The features of these foams are not limited to those listed above, other features include high modulus of elasticity, high strength against fatigue test, low water absorption (cell closure) and good hardness.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-935095a e-flex e-con-boxed e-con e-parent\" data-id=\"935095a\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-ead7ae0 elementor-widget elementor-widget-image\" data-id=\"ead7ae0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"650\" height=\"650\" src=\"https:\/\/imenpol.com\/blog\/en\/wp-content\/uploads\/sites\/2\/2024\/09\/car-filter.png\" class=\"attachment-full size-full wp-image-15416\" alt=\"\" srcset=\"https:\/\/imenpol.com\/blog\/en\/wp-content\/uploads\/sites\/2\/2024\/09\/car-filter.png 650w, https:\/\/imenpol.com\/blog\/en\/wp-content\/uploads\/sites\/2\/2024\/09\/car-filter-300x300.png 300w, https:\/\/imenpol.com\/blog\/en\/wp-content\/uploads\/sites\/2\/2024\/09\/car-filter-150x150.png 150w\" sizes=\"(max-width: 650px) 100vw, 650px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-3379b8e  table-contents e-flex e-con-boxed e-con e-parent\" data-id=\"3379b8e\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-84d8670 elementor-widget elementor-widget-text-editor\" data-id=\"84d8670\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h2><strong>Automotive air filter foam production process<\/strong><\/h2><p>In order to produce this product, it is necessary to mix polyols and isocyanates with a suitable composition to form a good polyurethane polymer chains. The process of this product is generally done by the injection machine, which has two types of low pressure and high pressure. In addition, the curing process of this product does not require the temperature to the mold due to the exothermic reaction between polyol and isocyanate and the curing is done at the ambient temperature after injecting the material in mold. One of the important thing that play an important role in manufacturing of polyurethane air filter foam is regarding the composition of polyurethane and isocyanate, in the reaction between polyol and isocyanate, OH groups are combined with NCO groups, respectively, to reach the final product. This value depends on the number of OH groups polyols as well as the number of NCO. Also the standard ratio of polyol and isocyanate use in automotive air filter foam is 3 (polyol) to 1 (isocyanate), which also decreases the amount of isocyanate consumed by increasing the amount of filler in polyol.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-c65a9f3 e-flex e-con-boxed e-con e-parent\" data-id=\"c65a9f3\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-649a253 elementor-widget elementor-widget-image\" data-id=\"649a253\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"423\" height=\"213\" src=\"https:\/\/imenpol.com\/blog\/en\/wp-content\/uploads\/sites\/2\/2024\/09\/Automotive-air-filter-foam.png\" class=\"attachment-full size-full wp-image-15415\" alt=\"Automotive air filter foam\" srcset=\"https:\/\/imenpol.com\/blog\/en\/wp-content\/uploads\/sites\/2\/2024\/09\/Automotive-air-filter-foam.png 423w, https:\/\/imenpol.com\/blog\/en\/wp-content\/uploads\/sites\/2\/2024\/09\/Automotive-air-filter-foam-300x151.png 300w\" sizes=\"(max-width: 423px) 100vw, 423px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Natural rubber was once the main material for sealing devices, but silicones and polyurethanes have replaced it due to their better properties. High-density polyurethane foams are now used in automotive air filters, offering benefits like elasticity, strength, and temperature resistance. These foams contain tiny bubbles formed during production, and their manufacturing involves mixing polyols and isocyanates, with curing taking place at room temperature through an exothermic reaction.<\/p>\n","protected":false},"author":4,"featured_media":15413,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[35,57,85],"class_list":["post-15411","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-educational","tag-air-filter-foam","tag-elastofoam","tag-polyurethane-foam-articles"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Air filter foam system - Imenpol blog<\/title>\n<meta name=\"description\" content=\"Imenpol blog\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/imenpol.com\/blog\/en\/educational\/air-filter-foam-system\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Air filter foam system - 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