{"id":1001,"date":"2026-01-19T17:34:01","date_gmt":"2026-01-19T08:34:01","guid":{"rendered":"https:\/\/cte-japan.com\/en\/?p=1001"},"modified":"2026-01-19T17:40:49","modified_gmt":"2026-01-19T08:40:49","slug":"plastic-fiber-scrap-recycling-using-an-htm-extruder","status":"publish","type":"post","link":"https:\/\/cte-japan.com\/en\/2026\/01\/19\/plastic-fiber-scrap-recycling-using-an-htm-extruder\/","title":{"rendered":"Plastic Fiber Scrap Recycling Using an HTM Extruder"},"content":{"rendered":"<p>Fiber-type plastic scrap materials have extremely low bulk density and tend to entangle easily.<br \/>\nUnlike pellets, these materials are difficult to feed consistently into an extruder screw, often leading to unstable feeding behavior during extrusion. As a result, issues such as hopper bridging and feed necking frequently occur, making stable processing difficult with conventional extruders.<\/p>\n<p>This article presents CTE\u2019s technical solution for recycling fiber-type plastic scrap, focusing on validation results using the HTM twin-screw compounding extruder.<\/p>\n<h2 class=\"style_h2\">Challenges of Fiber-Type Plastic Scrap<\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/cte-japan.com\/en\/wp-content\/uploads\/25-1024x683.jpg\" alt=\"Bulk plastic fiber scrap material with tangled nylon fibers, representing low bulk density recycled feedstock for twin-screw extrusion and compounding processes.\" width=\"1024\" height=\"683\" class=\"aligncenter size-large wp-image-1004\" srcset=\"https:\/\/cte-japan.com\/en\/wp-content\/uploads\/25-1024x683.jpg 1024w, https:\/\/cte-japan.com\/en\/wp-content\/uploads\/25-500x333.jpg 500w, https:\/\/cte-japan.com\/en\/wp-content\/uploads\/25-768x512.jpg 768w, https:\/\/cte-japan.com\/en\/wp-content\/uploads\/25-600x400.jpg 600w, https:\/\/cte-japan.com\/en\/wp-content\/uploads\/25.jpg 1200w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/p>\n<ul>\n<li>Extremely low bulk density (high air content)<\/li>\n<li>Fibers easily entangle and are difficult to disentangle<\/li>\n<li>Frequent bridging in the feeder hopper<\/li>\n<li>Unstable bite-in to the extruder screw<\/li>\n<\/ul>\n<p>Due to these factors, extrusion processes often suffer from feed necking and unstable material supply, making stable and high-output processing a major challenge.<\/p>\n<h2 class=\"style_h2\">HTM Twin-Screw Extruder Solution by CTE<\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/cte-japan.com\/en\/wp-content\/uploads\/2-5-1024x512.png\" alt=\"Diagram comparing intermesh and non-intermesh (HTM) twin-screw extruders, showing material flow and screw configurations. Intermesh focuses on gas movement and sealing, while HTM highlights efficient polymer flow.\" width=\"1024\" height=\"512\" class=\"aligncenter size-large wp-image-894\" srcset=\"https:\/\/cte-japan.com\/en\/wp-content\/uploads\/2-5-1024x512.png 1024w, https:\/\/cte-japan.com\/en\/wp-content\/uploads\/2-5-500x250.png 500w, https:\/\/cte-japan.com\/en\/wp-content\/uploads\/2-5-768x384.png 768w, https:\/\/cte-japan.com\/en\/wp-content\/uploads\/2-5.png 1200w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/p>\n<p>CTE\u2019s HTM twin-screw compounding extruder features a non-intermeshing, counter-rotating screw design, which allows gas to escape easily through the gap between the two screws.<br \/>\nThis structure provides excellent degassing performance, effectively suppressing feed necking even when processing low-bulk-density materials.<\/p>\n<p>By combining this screw design with a rear vent system and a hopper screw (force-feeding device), higher throughput can be achieved while maintaining stable operation.<\/p>\n<p>This configuration enables an efficient and reliable compounding process for fiber-type scrap materials that are difficult to handle with conventional intermeshing co-rotating extruders.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/cte-japan.com\/en\/wp-content\/uploads\/HTM\u578b.png\" alt=\"Diagram of an HTM twin-screw extruder showing key components, including the hopper screw, counter-rotating screws, open vent, and rear vent for efficient gas release and material processing.\" width=\"800\" height=\"400\" class=\"aligncenter size-full wp-image-766\" srcset=\"https:\/\/cte-japan.com\/en\/wp-content\/uploads\/HTM\u578b.png 800w, https:\/\/cte-japan.com\/en\/wp-content\/uploads\/HTM\u578b-500x250.png 500w, https:\/\/cte-japan.com\/en\/wp-content\/uploads\/HTM\u578b-768x384.png 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/p>\n<h2 class=\"style_h2\">Validation Results<\/h2>\n<p>Under these conditions, stable processing at up to 110 kg\/h was confirmed using the HTM-50 extruder, despite the extremely low bulk density of the material.<\/p>\n<table style=\"margin: 0 auto 40px; width: 90%; max-width: 900px; border-collapse: collapse;\">\n<tr>\n<th style=\"background-color:#2dabe2;color:#ffffff;font-weight:600;white-space:nowrap;padding:12px;\">\n      Material\n    <\/th>\n<td style=\"padding:12px;\">\n      Shredded plastic fiber scrap\n    <\/td>\n<\/tr>\n<tr>\n<th style=\"background-color:#2dabe2;color:#ffffff;font-weight:600;white-space:nowrap;padding:12px;\">\n      Bulk density\n    <\/th>\n<td style=\"padding:12px;\">\n      0.05\u20130.1 g\/cm\u00b3\n    <\/td>\n<\/tr>\n<tr>\n<th style=\"background-color:#2dabe2;color:#ffffff;font-weight:600;white-space:nowrap;padding:12px;\">\n      Extruder\n    <\/th>\n<td style=\"padding:12px;\">\n      HTM-50 Twin-Screw Compounding Extruder (Screw diameter: \u03c650 mm)\n    <\/td>\n<\/tr>\n<tr>\n<th style=\"background-color:#2dabe2;color:#ffffff;font-weight:600;white-space:nowrap;padding:12px;\">\n      Throughput\n    <\/th>\n<td style=\"padding:12px;\">\n      Up to 110 kg\/h\n    <\/td>\n<\/tr>\n<tr>\n<th style=\"background-color:#2dabe2;color:#ffffff;font-weight:600;white-space:nowrap;padding:12px;\">\n      Operating conditions\n    <\/th>\n<td style=\"padding:12px;\">\n      Rear vent not used \/ Hopper screw used\n    <\/td>\n<\/tr>\n<tr>\n<th style=\"background-color:#2dabe2;color:#ffffff;font-weight:600;white-space:nowrap;padding:12px;\">\n      Operating status\n    <\/th>\n<td style=\"padding:12px;\">\n      No feed necking or operational issues\n    <\/td>\n<\/tr>\n<\/table>\n<h3 class=\"style_h3\"><strong>Key Performance Findings<\/strong><\/h3>\n<ul>\n<li>\n    <strong>Stable material bite-in<\/strong><br \/>\n    Even without using the rear vent, the hopper screw functioned effectively, ensuring consistent feeding into the screw and smooth operation.\n  <\/li>\n<li>\n    <strong>Sufficient operational margin<\/strong><br \/>\n    Although the evaluation was limited to 110 kg\/h due to feeder capacity, screw speed and motor current still showed ample margin, indicating potential for higher throughput.\n  <\/li>\n<li>\n    <strong>Excellent degassing performance<\/strong><br \/>\n    Effective degassing through the open vent was observed, with no feed necking or related processing issues.\n  <\/li>\n<\/ul>\n<h2 class=\"style_h2\">Conclusion<\/h2>\n<p>In recycling fiber-type plastic scrap materials, the following factors have a significant impact on processing capacity and operational stability:<\/p>\n<ul>\n<li>Prevention of hopper bridging<\/li>\n<li>Stable material bite-in to the extruder screw<\/li>\n<li>Effective degassing of air-rich materials<\/li>\n<\/ul>\n<p>For such fiber-type materials, process optimization must consider not only the extruder itself, but also the feeding system as part of the overall process design.<\/p>\n<p>CTE provides integrated process solutions for challenging materials, including fiber-type plastic scrap, by optimizing the entire compounding line\u2014from feeding to extrusion and degassing.<\/p>\n","protected":false},"excerpt":{"rendered":"This article presents validation results for recycling plastic fiber scrap using an HTM twin-screw extruder, addressing low bulk density feeding challenges and degassing performance.","protected":false},"author":1,"featured_media":1005,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[40],"tags":[36,37,45,30,32],"class_list":["post-1001","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-extrusion-technology","tag-degassing","tag-low-bulk-density","tag-processing-optimization","tag-recycled-materials","tag-twin-screw-extruder"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/cte-japan.com\/en\/wp-json\/wp\/v2\/posts\/1001","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cte-japan.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cte-japan.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cte-japan.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/cte-japan.com\/en\/wp-json\/wp\/v2\/comments?post=1001"}],"version-history":[{"count":6,"href":"https:\/\/cte-japan.com\/en\/wp-json\/wp\/v2\/posts\/1001\/revisions"}],"predecessor-version":[{"id":1009,"href":"https:\/\/cte-japan.com\/en\/wp-json\/wp\/v2\/posts\/1001\/revisions\/1009"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cte-japan.com\/en\/wp-json\/wp\/v2\/media\/1005"}],"wp:attachment":[{"href":"https:\/\/cte-japan.com\/en\/wp-json\/wp\/v2\/media?parent=1001"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cte-japan.com\/en\/wp-json\/wp\/v2\/categories?post=1001"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cte-japan.com\/en\/wp-json\/wp\/v2\/tags?post=1001"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}