{"id":134050,"date":"2026-10-20T17:24:13","date_gmt":"2026-10-21T00:24:13","guid":{"rendered":"https:\/\/coirubber.com\/?page_id=134050"},"modified":"2026-10-27T12:19:51","modified_gmt":"2026-10-27T19:19:51","slug":"astm-d1238-melt-flow-rate","status":"publish","type":"page","link":"https:\/\/coirubber.com\/de\/astm\/astm-d1238-melt-flow-rate\/","title":{"rendered":"ASTM D1238 Melt Flow Rate"},"content":{"rendered":"<div class=\"coi-video-page\" style=\"max-width:1200px;margin:0 auto;padding:10px 20px 30px;\">\n<h3><strong>ASTM D1238 &#8211; Melt Flow Rate of Thermoplastics<\/strong><\/h3>\n<p>ASTM D1238 is a standard test method for measuring the melt flow rate (MFR) of thermoplastic materials by extrusion plastometer. A measured amount of material is heated to a set temperature, pushed through a small die under a fixed load, and the mass that flows out in ten minutes is reported in grams per 10 minutes. The result gives a quick, repeatable indication of how easily a plastic flows when molten.<\/p>\n<h4>Watch: ASTM D1238: What Does Melt Flow Rate Tell You? (Melt Flow Testing)<\/h4>\n<div style=\"position:relative;padding-bottom:56.25%;height:0;overflow:hidden;max-width:100%;margin:16px 0;\"><iframe src=\"https:\/\/www.youtube.com\/embed\/dBN9ntjT1n8\" title=\"ASTM D1238: What Does Melt Flow Rate Tell You? (Melt Flow Testing) - COi Rubber\" loading=\"lazy\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0;\" allow=\"accelerometer; encrypted-media; gyroscope; picture-in-picture\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/div>\n<p><em>Die veranschaulichenden Bilder in diesem Video sind KI-generiert.<\/em><\/p>\n<h4>Short: Higher melt flow is always better? ASTM D1238 in under a minute<\/h4>\n<div style=\"position:relative;width:100%;max-width:340px;margin:16px 0;\">\n<div style=\"position:relative;padding-bottom:177.78%;height:0;overflow:hidden;\"><iframe src=\"https:\/\/www.youtube.com\/embed\/4C_JZVBsrQs\" title=\"Higher melt flow is always better? ASTM D1238 - COi Rubber\" loading=\"lazy\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0;\" allow=\"accelerometer; encrypted-media; gyroscope; picture-in-picture\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/div>\n<\/div>\n<h4><strong>How to read a melt flow result<\/strong><\/h4>\n<ul>\n<li>A higher melt flow rate means the material flows more easily. A lower rate means it is stiffer when molten.<\/li>\n<li>Higher is not automatically better. The right value depends on the process (for example injection molding versus extrusion) and the part.<\/li>\n<li>Results are only comparable when the temperature and load are the same. Always check the test conditions on a data sheet before comparing two grades.<\/li>\n<li>Melt flow rate is a screening and quality-control number. It does not predict final part strength or service life on its own.<\/li>\n<\/ul>\n<p>Sehen Sie sich kurze Erkl\u00e4rvideos zu Gummi- und Kunststoffpr\u00fcfungen in unserer <a href=\"https:\/\/coirubber.com\/de\/video-library\/\">Video-Bibliothek f\u00fcr Gummipr\u00fcfungen<\/a>. For plastic strength, see <a href=\"https:\/\/coirubber.com\/de\/astm\/astm-d638-plastic-tensile-properties\/\">ASTM D638 tensile properties<\/a>.<\/p>\n<p>Ben\u00f6tigen Sie ma\u00dfgefertigte Gummi- oder Kunststoffteile? Senden Sie Ihre Zeichnung und Anforderungen an <a href=\"mailto:estimator@coirubber.com\">estimator@coirubber.com<\/a> oder <a href=\"https:\/\/coirubber.com\/de\/contact-us\/\">unser Team kontaktieren<\/a>. COi Rubber ist ein Unternehmen in US-amerikanischem Besitz und Betrieb, und unser Fertigungsstandort in Wuhu, China, ist nach IATF 16949 zertifiziert.<\/p>\n<p><script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"VideoObject\",\"name\":\"ASTM D1238: What Does Melt Flow Rate Tell You? 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A measured amount of material is heated to a set temperature, pushed through a small die under a fixed load, and the mass that flows out in [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":64088,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"_exactmetrics_skip_tracking":false,"footnotes":""},"class_list":["post-134050","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>ASTM D1238 Melt Flow Rate - COi Rubber Products<\/title>\n<meta name=\"description\" content=\"ASTM D1238 melt flow rate explained: what the test measures, how to read a result, and why conditions must match. 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