{"id":9153,"date":"2025-01-30T14:08:40","date_gmt":"2025-01-30T22:08:40","guid":{"rendered":"https:\/\/www.recyclemachine.net\/?p=9153"},"modified":"2026-09-25T23:06:58","modified_gmt":"2026-09-26T06:06:58","slug":"%d0%bb%d1%83%d1%87%d1%88%d0%b8%d0%b5-%d0%bc%d0%b0%d1%88%d0%b8%d0%bd%d1%8b-%d0%b4%d0%bb%d1%8f-%d0%b3%d1%80%d0%b0%d0%bd%d1%83%d0%bb%d0%b8%d1%80%d0%be%d0%b2%d0%b0%d0%bd%d0%b8%d1%8f-%d0%bf%d0%bb%d0%b0","status":"publish","type":"post","link":"https:\/\/www.recyclemachine.net\/ru\/%d0%bb%d1%83%d1%87%d1%88%d0%b8%d0%b5-%d0%bc%d0%b0%d1%88%d0%b8%d0%bd%d1%8b-%d0%b4%d0%bb%d1%8f-%d0%b3%d1%80%d0%b0%d0%bd%d1%83%d0%bb%d0%b8%d1%80%d0%be%d0%b2%d0%b0%d0%bd%d0%b8%d1%8f-%d0%bf%d0%bb%d0%b0\/","title":{"rendered":"\u041b\u0443\u0447\u0448\u0438\u0435 \u0433\u0440\u0430\u043d\u0443\u043b\u044f\u0442\u043e\u0440\u044b \u0434\u043b\u044f \u043f\u0435\u0440\u0435\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u041f\u042d\u0422-\u0445\u043b\u043e\u043f\u044c\u0435\u0432"},"content":{"rendered":"<p>Pelletizing is the step that turns washed PET flakes into a sellable product. Choosing the right plastic pelletizer machines for PET flakes recycling determines pellet quality, operating cost, and whether your output qualifies for higher-value applications. This guide covers what actually matters when selecting a pelletizer for PET flakes: the PET-specific process requirements, the two cutting configurations used in practice, and a checklist to use when requesting a quotation. Pelletizing is one stage of the full process \u2014 see <a href=\"https:\/\/www.recyclemachine.net\/plastic-recycling-machines-complete-guide\/\">how plastic recycling machines work together<\/a> in our complete equipment guide.<\/p>\n<h2>Key considerations when choosing plastic pelletizer machines for PET flakes recycling<\/h2>\n<p>PET behaves differently from polyolefins inside an extruder. Five points decide whether a pelletizing line will run stably and produce pellets your buyers accept:<\/p>\n<ul>\n<li><strong>Drying and crystallization.<\/strong> PET is hygroscopic &mdash; any moisture left in the flakes causes hydrolysis in the extruder, which permanently destroys intrinsic viscosity (IV). Flakes must be crystallized and dried to very low residual moisture before extrusion; for demanding applications this is often specified below 50 ppm.<\/li>\n<li><strong>IV retention.<\/strong> Every heat cycle degrades PET&rsquo;s intrinsic viscosity. A gentle screw design, a correct temperature profile, and short residence time limit the IV drop between flake and pellet. If your buyers specify a minimum IV, the line must be configured to protect it.<\/li>\n<li><strong>Vacuum degassing.<\/strong> Multi-stage vacuum venting removes residual moisture, volatile organic compounds, and odors. This is essential for flakes from post-consumer bottles and for any pellets targeting higher-value applications.<\/li>\n<li><strong>Melt filtration.<\/strong> Filtration catches what washing missed &mdash; paper fibers, label fragments, aluminum, sand. Finer screens suit fiber or food-contact pellets; automatic screen changers keep the line running instead of stopping for manual screen swaps when filters load up.<\/li>\n<li><strong>Throughput vs. contamination.<\/strong> Dirtier flakes load filters faster and need more filtration area and more robust degassing. Size the line for your sustained contaminated throughput, not the nameplate best case measured on clean flakes.<\/li>\n<\/ul>\n<p>Most PET flake pelletizing lines are built around a single-screw extruder, which is the economical choice for reprocessing one polymer stream. Twin-screw machines appear where intensive compounding or devolatilization is required, but for straight flake-to-pellet production a well-specified single-screw line with vacuum degassing is the standard answer.<\/p>\n<h2>Main pelletizer configurations for PET flakes<\/h2>\n<p>Once the melt is filtered and degassed, it has to be cut into pellets. Two cutting configurations are actually used for PET flakes in production:<\/p>\n<h3>Strand pelletizing<\/h3>\n<p>Molten PET is extruded through a strand die, cooled in a water bath, and cut into pellets by a strand cutter. The setup is simple and lower in cost, which suits smaller lines running relatively clean flakes. The weak point is contaminated melt: it breaks strands, and every break means operator intervention and downtime.<\/p>\n<h3>Water-ring die-face cutting<\/h3>\n<p>Pellets are cut directly at the die face and flung into a water ring for cooling and conveying. This handles higher throughputs with more consistent pellet geometry and far fewer interruptions from melt contamination. The initial investment is higher, which is why water-ring systems appear mostly on larger or more automated lines.<\/p>\n<table>\n<thead>\n<tr><th>Configuration<\/th><th>How it works<\/th><th>Best for<\/th><th>Watch out for<\/th><\/tr>\n<\/thead>\n<tbody>\n<tr><td>Strand pelletizing<\/td><td>Strands extruded, water-bath cooled, then cut<\/td><td>Smaller lines, cleaner flakes, tighter budgets<\/td><td>Strand breaks on contaminated melt cause downtime<\/td><\/tr>\n<tr><td>Water-ring die-face cutting<\/td><td>Pellets cut at the die face, cooled in a water ring<\/td><td>Higher throughputs, consistent pellet geometry<\/td><td>Higher initial investment<\/td><\/tr>\n<\/tbody>\n<\/table>\n<h2>RUMTOO pelletizer options<\/h2>\n<p>RUMTOO builds <a href=\"https:\/\/www.recyclemachine.net\/plastic-pelletizers\/\">single-screw pelletizing lines for PET flakes<\/a> in several sizes, including the RUMTOO-2000 for higher-volume operations and the RUMTOO-500 for smaller lines. Lines can be configured with crystallization drying, vacuum degassing, and melt filtration matched to your flake quality and target pellet application. Exact specifications depend on the feedstock &mdash; confirm the configuration with our engineering team based on your material rather than a catalog number.<\/p>\n<h2>How to choose: quotation checklist<\/h2>\n<p>Use this checklist when requesting a quotation. The answers determine the right configuration, and any serious supplier will ask for them:<\/p>\n<ul>\n<li>Feedstock: bottle flakes, thermoforms, or mixed streams? What is the contamination level?<\/li>\n<li>Target throughput in kg\/h &mdash; sustained output, not peak.<\/li>\n<li>Final pellet application: fiber, strapping, sheet, or food-contact? Each sets different drying and filtration requirements.<\/li>\n<li>Available utilities: power supply, process water, floor space, and ceiling height.<\/li>\n<li>Automation level and labor expectations per shift.<\/li>\n<li>After-sales scope: installation, commissioning, operator training, and spare parts supply.<\/li>\n<\/ul>\n<h2>Frequently asked questions<\/h2>\n<h3>How dry must PET flakes be before pelletizing?<\/h3>\n<p>PET absorbs moisture from the air, and any moisture in the extruder causes hydrolysis that permanently lowers IV. Flakes are normally crystallized and dried to very low residual moisture before extrusion &mdash; confirm the dryer specification against your target application, because food-contact and fiber grades are the least forgiving.<\/p>\n<h3>How much will intrinsic viscosity drop during pelletizing?<\/h3>\n<p>Some IV drop is unavoidable with every heat cycle. Gentle screw design, correct temperature profiles, short residence time, thorough drying, and vacuum degassing all minimize it. Tell your supplier the IV your buyers require so the line is configured to protect it from the start.<\/p>\n<h3>What melt filtration fineness do I need?<\/h3>\n<p>It depends on where the pellets go: fiber and food-contact applications need finer filtration than strapping or sheet. If your flakes carry variable contamination, an automatic screen changer pays for itself by avoiding manual screen-change stops.<\/p>\n<h3>Strand or water-ring cutting for my line?<\/h3>\n<p>Strand cutting suits smaller lines with cleaner flakes and tighter budgets. Water-ring die-face cutting suits higher throughputs, more contaminated feedstock, and operations that need consistent pellet geometry with less operator intervention.<\/p>\n<h3>What lead time should I expect?<\/h3>\n<p>Lead time depends on capacity and configuration &mdash; drying, degassing, filtration, and automation options all affect it. Share your throughput target and required options for an accurate delivery schedule.<\/p>\n\n<script type=\"application\/ld+json\">\n{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"How dry must PET flakes be before pelletizing?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"PET absorbs moisture from the air, and any moisture in the extruder causes hydrolysis that permanently lowers IV. 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If your flakes carry variable contamination, an automatic screen changer pays for itself by avoiding manual screen-change stops.\"}}, {\"@type\": \"Question\", \"name\": \"Strand or water-ring cutting for my line?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Strand cutting suits smaller lines with cleaner flakes and tighter budgets. Water-ring die-face cutting suits higher throughputs, more contaminated feedstock, and operations that need consistent pellet geometry with less operator intervention.\"}}, {\"@type\": \"Question\", \"name\": \"What lead time should I expect?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Lead time depends on capacity and configuration \u2014 drying, degassing, filtration, and automation options all affect it. Share your throughput target and required options for an accurate delivery schedule.\"}}]}\n<\/script>\n\n<p><strong>Request a matched configuration.<\/strong> Share your flake source, contamination level, target throughput, and intended pellet application, and we will recommend a pelletizing configuration sized around your material &mdash; with a detailed quotation.<\/p>\n<p><strong>Related reading:<\/strong> <a href=\"https:\/\/www.recyclemachine.net\/what-is-a-single-screw-pelletizer-for-pet-plastic-flakes\/\">What Is a Single Screw Pelletizer for PET Plastic Flakes?<\/a> &middot; <a href=\"https:\/\/www.recyclemachine.net\/plastic-granulator-guide\/\">Plastic Granulator Guide: Working Principle &amp; Specs<\/a> &middot; <a href=\"https:\/\/www.recyclemachine.net\/500-kg-h-pet-bottle-recycling-washing-line-guide-and-price\/\">500 kg\/h PET Bottle Recycling Washing Line: Guide and Price<\/a> &middot; <a href=\"https:\/\/www.recyclemachine.net\/the-ultimate-guide-to-pet-recycling-machine\/\">The Ultimate Guide to PET Recycling Machine<\/a> &middot; <a href=\"https:\/\/www.recyclemachine.net\/how-to-control-pvc-in-pet-bottle-recycling-lines-below-50-ppm\/\">How to Control PVC in PET Bottle Recycling Lines Below 50 ppm<\/a><\/p>\n\n\n\n","protected":false},"excerpt":{"rendered":"<p>Pelletizing turns washed PET flakes into a sellable product \u2014 strand or water-ring die-face cutting, each with PET-specific demands on dryness, melt filtration, and viscosity control. Use the selection criteria and quotation checklist to get a machine that protects pellet quality and your operating cost.<\/p>","protected":false},"author":1,"featured_media":17809,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[100],"tags":[],"class_list":["post-9153","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-recycling-news"],"tsf_seo":{"title":"\u041b\u0443\u0447\u0448\u0438\u0435 \u0433\u0440\u0430\u043d\u0443\u043b\u044f\u0442\u043e\u0440\u044b \u0434\u043b\u044f \u043f\u0435\u0440\u0435\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u041f\u042d\u0422-\u0445\u043b\u043e\u043f\u044c\u0435\u0432","description":"\u0420\u0443\u043a\u043e\u0432\u043e\u0434\u0441\u0442\u0432\u043e \u043f\u043e \u043f\u0435\u043b\u043b\u0435\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044e \u041f\u042d\u0422: \u0441\u0442\u0440\u0435\u043d\u0433\u043e\u0432\u0430\u044f vs \u0432\u043e\u0434\u043e\u043a\u043e\u043b\u044c\u0446\u0435\u0432\u0430\u044f \u0440\u0435\u0437\u043a\u0430, \u0441\u0443\u0448\u043a\u0430 \u0438 \u043a\u0440\u0438\u0441\u0442\u0430\u043b\u043b\u0438\u0437\u0430\u0446\u0438\u044f, \u0441\u043e\u0445\u0440\u0430\u043d\u0435\u043d\u0438\u0435 IV, \u0444\u0438\u043b\u044c\u0442\u0440\u0430\u0446\u0438\u044f \u0440\u0430\u0441\u043f\u043b\u0430\u0432\u0430\u2014\u043f\u043b\u044e\u0441 \u043a\u043e\u043d\u0442\u0440\u043e\u043b\u044c\u043d\u044b\u0439 \u0441\u043f\u0438\u0441\u043e\u043a \u0434\u043b\u044f \u0437\u0430\u043f\u0440\u043e\u0441\u0430 \u041a\u041f \u043d\u0430 \u043b\u0438\u043d\u0438\u0438 rPET."},"_links":{"self":[{"href":"https:\/\/www.recyclemachine.net\/ru\/wp-json\/wp\/v2\/posts\/9153","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.recyclemachine.net\/ru\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.recyclemachine.net\/ru\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.recyclemachine.net\/ru\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.recyclemachine.net\/ru\/wp-json\/wp\/v2\/comments?post=9153"}],"version-history":[{"count":6,"href":"https:\/\/www.recyclemachine.net\/ru\/wp-json\/wp\/v2\/posts\/9153\/revisions"}],"predecessor-version":[{"id":17585,"href":"https:\/\/www.recyclemachine.net\/ru\/wp-json\/wp\/v2\/posts\/9153\/revisions\/17585"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.recyclemachine.net\/ru\/wp-json\/wp\/v2\/media\/17809"}],"wp:attachment":[{"href":"https:\/\/www.recyclemachine.net\/ru\/wp-json\/wp\/v2\/media?parent=9153"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.recyclemachine.net\/ru\/wp-json\/wp\/v2\/categories?post=9153"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.recyclemachine.net\/ru\/wp-json\/wp\/v2\/tags?post=9153"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}