{"id":44,"date":"2026-11-06T19:04:40","date_gmt":"2026-11-06T11:04:40","guid":{"rendered":"https:\/\/kerkepm.com\/applications\/biodegradable\/"},"modified":"2026-11-11T23:40:54","modified_gmt":"2026-11-11T15:40:54","slug":"biodegradable-plastic-extrusion","status":"publish","type":"page","link":"https:\/\/kerkepm.com\/es\/applications\/biodegradable-plastic-extrusion\/","title":{"rendered":"Biodegradable Plastic Extrusion"},"content":{"rendered":"<div class=\"k3\">\n<noscript><iframe loading=\"lazy\" src=\"https:\/\/www.googletagmanager.com\/ns.html?id=GTM-5JN495RG\" height=\"0\" width=\"0\" style=\"display:none;visibility:hidden\"><\/iframe><\/noscript>\n<div class=\"wrap\"><div class=\"crumbs\"><a href=\"\/\">Home<\/a><span>\/<\/span><a href=\"\/applications\/\">Applications<\/a><span>\/<\/span>Biodegradable Plastic Extrusion<\/div><\/div><div class=\"wrap\"><div class=\"hero\">\n<p class=\"kicker\">Application \u00b7 Biodegradable & PLA<\/p>\n<h1>Biodegradable Plastic Extrusion: Protect the Molecules<\/h1>\n<p class=\"dek\">PLA, PBAT and starch blends degrade twice: once in the environment, which is the point, and once in the extruder, which is a scrap batch. The whole line is designed around the second one. A reference biodegradable plastic extrusion page from Kerke.<\/p>\n<div class=\"byline\"><div><b>Updated<\/b> 6 November 2026<\/div>\n<div><b>Output<\/b> 100\u20131,000 kg\/h<\/div>\n<div><b>Line type<\/b> Co-rotating twin screw KTE<\/div>\n<div><b>Basis<\/b> parameter table + material trial<\/div><\/div>\n<\/div><\/div>\n<div class=\"wrap\"><div class=\"appmedia\">\n<div class=\"mslider\" id=\"appslider\">\n<div class=\"ms-frame\"><div class=\"ms-slide on\"><img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/11\/biodegradable-s1.webp\" alt=\"Biodegradable Plastic Extrusion \u2014 workshop photo 1, Kerke workshop, Nanjing\" loading=\"lazy\"><span class=\"ms-cap\">Biodegradable Plastic Extrusion \u2014 workshop photo 1, Kerke workshop, Nanjing<\/span><\/div><div class=\"ms-slide\"><img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/11\/biodegradable-s2.webp\" alt=\"Biodegradable Plastic Extrusion \u2014 workshop photo 2, Kerke workshop, Nanjing\" loading=\"lazy\"><span class=\"ms-cap\">Biodegradable Plastic Extrusion \u2014 workshop photo 2, Kerke workshop, Nanjing<\/span><\/div><div class=\"ms-slide\"><img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/11\/biodegradable-s3.webp\" alt=\"Biodegradable Plastic Extrusion \u2014 workshop photo 3, Kerke workshop, Nanjing\" loading=\"lazy\"><span class=\"ms-cap\">Biodegradable Plastic Extrusion \u2014 workshop photo 3, Kerke workshop, Nanjing<\/span><\/div><div class=\"ms-slide\"><img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/11\/biodegradable-s4.webp\" alt=\"Biodegradable Plastic Extrusion \u2014 workshop photo 4, Kerke workshop, Nanjing\" loading=\"lazy\"><span class=\"ms-cap\">Biodegradable Plastic Extrusion \u2014 workshop photo 4, Kerke workshop, Nanjing<\/span><\/div><div class=\"ms-slide\"><img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/11\/biodegradable-s5.webp\" alt=\"Biodegradable Plastic Extrusion \u2014 workshop photo 5, Kerke workshop, Nanjing\" loading=\"lazy\"><span class=\"ms-cap\">Biodegradable Plastic Extrusion \u2014 workshop photo 5, Kerke workshop, Nanjing<\/span><\/div><div class=\"ms-slide\"><img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/11\/biodegradable-s6.webp\" alt=\"Biodegradable Plastic Extrusion \u2014 workshop photo 6, Kerke workshop, Nanjing\" loading=\"lazy\"><span class=\"ms-cap\">Biodegradable Plastic Extrusion \u2014 workshop photo 6, Kerke workshop, Nanjing<\/span><\/div><div class=\"ms-slide\"><div class=\"ms-video\" data-yt=\"sXTD0ql6yAk\"><img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/11\/biodegradable-s1.webp\" alt=\"Running video \u2014 Biodegradable Plastic Extrusion, Kerke workshop\" loading=\"lazy\"><button type=\"button\" class=\"ms-play\" aria-label=\"Play video\">&#9654;<\/button><\/div><span class=\"ms-cap\">Running video \u2014 Biodegradable Plastic Extrusion, Kerke workshop<\/span><\/div><\/div>\n<button type=\"button\" class=\"ms-nav prev\" aria-label=\"Previous slide\">&#8249;<\/button>\n<button type=\"button\" class=\"ms-nav next\" aria-label=\"Next slide\">&#8250;<\/button>\n<div class=\"ms-dots\"><button type=\"button\" data-i=\"0\" class=\"ms-dot on\" aria-label=\"Slide 1\"><\/button><button type=\"button\" data-i=\"1\" class=\"ms-dot\" aria-label=\"Slide 2\"><\/button><button type=\"button\" data-i=\"2\" class=\"ms-dot\" aria-label=\"Slide 3\"><\/button><button type=\"button\" data-i=\"3\" class=\"ms-dot\" aria-label=\"Slide 4\"><\/button><button type=\"button\" data-i=\"4\" class=\"ms-dot\" aria-label=\"Slide 5\"><\/button><button type=\"button\" data-i=\"5\" class=\"ms-dot\" aria-label=\"Slide 6\"><\/button><button type=\"button\" data-i=\"6\" class=\"ms-dot\" aria-label=\"Slide 7\"><\/button><\/div>\n<\/div>\n<div class=\"appmedia-text\">\n<section class=\"qa\" id=\"answer\"><nav class=\"wp-block-rank-math-toc-block k3-toc\" aria-label=\"On this page\"><b>On this page:<\/b><a href=\"#rm-s1\">Quick answer<\/a><a href=\"#rm-s2\">What sets the limit<\/a><a href=\"#rm-s3\">Process flow, step by step<\/a><a href=\"#rm-s4\">Equipment configuration<\/a><a href=\"#rm-s5\">Output by model<\/a><\/nav><h2 id=\"rm-s1\">Quick answer<\/h2><p>Biodegradable compounds (PLA, starch-based, PBAT, PBAT\/PLA blends) run at <strong>120\u2013180 \u00b0C<\/strong> with L\/D 40\u201348 and gentle screw designs that protect molecular weight. Output <strong>100\u20131,000 kg\/h<\/strong>. Air-cooled strand pelletizing is preferred over water cooling to avoid hydrolysis.<\/p><\/section>\n<\/div>\n<\/div><\/div>\n<div class=\"wrap\"><div class=\"grid\"><main>\n<div class=\"stats\"><div class=\"stat\"><b>170\u2013200 \u00b0C<\/b><span>PLA window<\/span><\/div><div class=\"stat\"><b>&lt;0.05%<\/b><span>moisture<\/span><\/div><div class=\"stat\"><b>140\u2013200 kg\/h<\/b><span>KTE-65<\/span><\/div><\/div>\n<p class=\"note\">Workshop photos and a running video \u2014 shot on our own lines, not stock images.<\/p>\n\n<h2 class=\"sec\" id=\"limit\" id=\"rm-s2\">What sets the limit<\/h2>\n<p class=\"lead\">Starch or PLA is dried to below 300 ppm, metered with plasticizer and compatibilizer, compounded at low shear, devolatilized and strand-pelletized with air cooling.<\/p>\n<div class=\"tw\"><table><caption><b>Table 1.<\/b> Key parameters for biodegradable plastic extrusion line. Reference values \u2014 confirm on a material trial.<\/caption>\n<thead><tr><th scope=\"col\">Parameter<\/th><th scope=\"col\">Value \/ range<\/th><\/tr><\/thead><tbody><tr><td><b>Materials<\/b><\/td><td>PLA, starch-based, PBAT, PBS, blends<\/td><\/tr><tr><td><b>Temperature<\/b><\/td><td>120\u2013180 \u00b0C (PLA degrades above 200 \u00b0C)<\/td><\/tr><tr><td><b>L\/D<\/b><\/td><td>40\u201348<\/td><\/tr><tr><td><b>Pelletizing<\/b><\/td><td>Air-cooled strand (protects molecular weight)<\/td><\/tr><tr><td><b>Output (reference)<\/b><\/td><td>100\u20131,000 kg\/h<\/td><\/tr><tr><td><b>Model<\/b><\/td><td>KTE-50B, KTE-65B<\/td><\/tr><\/tbody><\/table><\/div>\n<p class=\"note\">Output figures are measured on the reference material stated above. Filler grade, bulk density and moisture move output by \u00b115% \u2014 that is why every quotation we issue is tied to a trial report.<\/p>\n\n<h2 class=\"sec\" id=\"process\" id=\"rm-s3\">Process flow, step by step<\/h2>\n<ol class=\"flow\"><li><b>Feeding<\/b>Loss-in-weight dosing of polymer and filler; side feeder or liquid injection where the formulation needs it.<\/li><li><b>Melting and dispersing<\/b>Screw geometry with 45\u00b0\/90\u00b0 kneading blocks; barrel profile 120\u2013180 \u00b0C (PLA degrades above 200 \u00b0C).<\/li><li><b>Devolatilization<\/b>Vacuum vent at \u22120.06 to \u22120.09 MPa removes moisture and volatiles before the die.<\/li><li><b>Pressure build-up<\/b>Throttle or discharge section stabilises die pressure; a melt pump where gauge control matters.<\/li><li><b>Pelletizing and packing<\/b>Air-cooled strand (protects molecular weight); then centrifugal dryer, vibrating screen and bagging.<\/li><\/ol>\n\n<h2 class=\"sec\" id=\"equipment\" id=\"rm-s4\">Equipment configuration<\/h2>\n<div class=\"tw\"><table><caption><b>Table 2.<\/b> What the line is made of, and why each part is specified that way.<\/caption>\n<thead><tr><th scope=\"col\">Stage<\/th><th scope=\"col\">Equipment<\/th><th scope=\"col\">Why this choice<\/th><\/tr><\/thead><tbody>\n<tr><td>Main machine<\/td><td><a href=\"\/machines\/co-rotating-twin-screw-extruder\/\">Co-Rotating Twin Screw Extruder<\/a><\/td><td>Architecture follows the filling level and the mixing duty, not the required tonnage.<\/td><\/tr>\n<tr><td>Screw geometry<\/td><td>Building-block elements, W6Mo5Cr4V2, bimetallic liner<\/td><td>Wear package for abrasive filler; mixing blocks only where dispersion demands them.<\/td><\/tr>\n<tr><td>Feeding<\/td><td><a href=\"\/machines\/gravimetric-feeding-system\/\">Loss-in-weight feeder<\/a>, side feeder where needed<\/td><td>Recipe accuracy: \u00b10.5% short term on the weighed component.<\/td><\/tr>\n<tr><td>Pelletizing<\/td><td><a href=\"\/machines\/pelletizing-systems\/\">Pelletizing system<\/a><\/td><td>Chosen by polymer and filler ceiling \u2014 water contact is the deciding column.<\/td><\/tr>\n<tr><td>Downstream<\/td><td>Centrifugal dryer, vibrating screen, bagging<\/td><td>Fines below 2% and moisture below the specification of your downstream process.<\/td><\/tr>\n<\/tbody><\/table><\/div>\n\n<h2 class=\"sec\" id=\"output\" id=\"rm-s5\">Output by model<\/h2>\n<div class=\"tw\"><table><caption><b>Table 3.<\/b> Co-rotating twin screw KTE \u2014 reference output. Full range on the <a href=\"\/machines\/co-rotating-twin-screw-extruder\/\">machine page<\/a>.<\/caption>\n<thead><tr><th scope=\"col\">Model<\/th><th scope=\"col\">Dia. (mm)<\/th><th scope=\"col\">Speed (rpm)<\/th><th scope=\"col\">Motor (kW)<\/th><th scope=\"col\">Torque (N\u00b7m)<\/th><th scope=\"col\">Output (kg\/h)<\/th><\/tr><\/thead><tbody><tr><td class=\"num\"><a href=\"\/applications\/kte-50b\/\">KTE-50B<\/a><\/td><td class=\"num\">50.5<\/td><td class=\"num\">500\u2013600<\/td><td class=\"num\">55\u201375<\/td><td class=\"num\">2\u00d7525<\/td><td class=\"num\">80\u2013200<\/td><\/tr><tr><td class=\"num\"><a href=\"\/applications\/kte-50d\/\">KTE-50D<\/a><\/td><td class=\"num\">50.5<\/td><td class=\"num\">300\u2013800<\/td><td class=\"num\">75\u201390<\/td><td class=\"num\">2\u00d7860<\/td><td class=\"num\">100\u2013300<\/td><\/tr><tr><td class=\"num\"><a href=\"\/applications\/kte-52b\/\">KTE-52B<\/a><\/td><td class=\"num\">51.4<\/td><td class=\"num\">500\u2013600<\/td><td class=\"num\">55\u201375<\/td><td class=\"num\">2\u00d7720<\/td><td class=\"num\">80\u2013200<\/td><\/tr><tr><td class=\"num\"><a href=\"\/applications\/kte-52d\/\">KTE-52D<\/a><\/td><td class=\"num\">51.4<\/td><td class=\"num\">500\u2013600<\/td><td class=\"num\">75\u2013110<\/td><td class=\"num\">2\u00d71050<\/td><td class=\"num\">100\u2013400<\/td><\/tr><tr><td class=\"num\"><a href=\"\/applications\/kte-65b\/\">KTE-65B<\/a><\/td><td class=\"num\">62.4<\/td><td class=\"num\">500\u2013600<\/td><td class=\"num\">90\u2013110<\/td><td class=\"num\">2\u00d7860<\/td><td class=\"num\">200\u2013450<\/td><\/tr><tr><td class=\"num\"><a href=\"\/applications\/kte-65d\/\">KTE-65D<\/a><\/td><td class=\"num\">62.4<\/td><td class=\"num\">300\u2013800<\/td><td class=\"num\">132\u2013160<\/td><td class=\"num\">2\u00d71530<\/td><td class=\"num\">350\u2013600<\/td><\/tr><tr><td class=\"num\"><a href=\"\/applications\/kte-75b\/\">KTE-75B<\/a><\/td><td class=\"num\">71<\/td><td class=\"num\">500\u2013600<\/td><td class=\"num\">132\u2013160<\/td><td class=\"num\">2\u00d71530<\/td><td class=\"num\">300\u2013800<\/td><\/tr><tr><td class=\"num\"><a href=\"\/applications\/kte-75d\/\">KTE-75D<\/a><\/td><td class=\"num\">71<\/td><td class=\"num\">300\u2013800<\/td><td class=\"num\">200\u2013315<\/td><td class=\"num\">2\u00d72100<\/td><td class=\"num\">500\u20131000<\/td><\/tr><tr><td class=\"num\"><a href=\"\/applications\/kte-85b\/\">KTE-85B<\/a><\/td><td class=\"num\">85<\/td><td class=\"num\">500\u2013600<\/td><td class=\"num\">220\u2013315<\/td><td class=\"num\">2\u00d72100<\/td><td class=\"num\">550\u20131000<\/td><\/tr><tr><td class=\"num\"><a href=\"\/applications\/kte-95b\/\">KTE-95B<\/a><\/td><td class=\"num\">93<\/td><td class=\"num\">500\u2013600<\/td><td class=\"num\">250\u2013315<\/td><td class=\"num\">2\u00d73000<\/td><td class=\"num\">800\u20131500<\/td><\/tr><tr><td class=\"num\"><a href=\"\/applications\/kte-95d\/\">KTE-95D<\/a><\/td><td class=\"num\">93<\/td><td class=\"num\">500\u2013800<\/td><td class=\"num\">315\u2013500<\/td><td class=\"num\">2\u00d74800<\/td><td class=\"num\">1000\u20132000<\/td><\/tr><tr><td class=\"num\"><a href=\"\/applications\/kte-135b\/\">KTE-135B<\/a><\/td><td class=\"num\">135<\/td><td class=\"num\">500\u2013600<\/td><td class=\"num\">315\u2013500<\/td><td class=\"num\">2\u00d74800<\/td><td class=\"num\">1500\u20133000<\/td><\/tr><tr><td class=\"num\"><a href=\"\/applications\/kte-135d\/\">KTE-135D<\/a><\/td><td class=\"num\">135<\/td><td class=\"num\">500\u2013800<\/td><td class=\"num\">500\u20131000<\/td><td class=\"num\">2\u00d77800<\/td><td class=\"num\">1500\u20134000<\/td><\/tr><\/tbody><\/table><\/div>\n\n<h2 class=\"sec\" id=\"mistakes\" id=\"rm-s6\">Three mistakes that cost the most<\/h2>\n<div class=\"call warn\"><h4>1. Wet starch: steam flashes in the barrel and the strand breaks constantly.<\/h4><p>Wet starch: steam flashes in the barrel and the strand breaks constantly.<\/p><\/div><div class=\"call warn\"><h4>2. Water bath cooling absorbs moisture back into PLA and hydrolyses it during storage.<\/h4><p>Water bath cooling absorbs moisture back into PLA and hydrolyses it during storage.<\/p><\/div><div class=\"call warn\"><h4>3. Barrel profile copied from PP masterbatch<\/h4><p>Barrel profile copied from PP masterbatch \u2014 PLA above 200\u2013210 \u00b0C and starch blends drop molecular weight in a step; keep it short (36\u201340D) and cool, not long and hot.<\/p><\/div>\n\n<h2 class=\"sec\" id=\"faq\" id=\"rm-s7\">FAQ<\/h2>\n<details open><summary>Why air-cooled strand?<\/summary><p>PLA and starch-based compounds are hygroscopic; air cooling avoids re-absorbing water and losing molecular weight.<\/p><\/details><details><summary>Can the line run 60% starch?<\/summary><p>Yes, with a dedicated screw configuration and a side feeder for starch; the limiting factor is usually starch dryness, not the machine.<\/p><\/details><details><summary>What output can you guarantee for this application?<\/summary><p>The reference band is 100\u20131,000 kg\/h, measured on the stated material. We quote a guaranteed figure only after a trial on your own material, because filler grade, bulk density and moisture move output by \u00b115%.<\/p><\/details><details><summary>Can we run our material before ordering?<\/summary><p>Yes \u2014 send 25\u201350 kg. We return pellets, a running video and a report with temperatures, screw speed, feeder settings and output per hour. The trial is free; you cover the freight.<\/p><\/details><details><summary>What is the delivery time?<\/summary><p>30\u201345 working days for standard configurations, 45\u201370 for custom screw geometry and ODM work. Voltage and frequency are built for the destination country.<\/p><\/details>\n\n<div class=\"method\"><h2 id=\"rm-s8\">Where these numbers come from<\/h2>\n<p>Parameters are taken from the Kerke product parameter table and the product master data sheet, and cross-checked against commissioning records for lines in the same application. Formulations and temperature windows are typical industry values, not a recommendation for your specific compound \u2014 every figure marked <em>reference<\/em> must be confirmed on a material trial before it becomes a contractual number.<\/p>\n<p>Reviewed by the Kerke process team, Nanjing. Page updated 6 November 2026.<\/p><\/div>\n\n<div class=\"related\"><h2 id=\"rm-s9\">Related<\/h2><div class=\"rel-grid\"><a class=\"rel\" href=\"\/applications\/pla-pelletizing\/\"><span>Application<\/span>PLA Extrusion & Pelletizing Line<\/a><a class=\"rel\" href=\"\/applications\/3d-printing-filament-pellets\/\"><span>Application<\/span>3D Printing Filament Material Pelletizing Line<\/a><a class=\"rel\" href=\"\/machines\/co-rotating-twin-screw-extruder\/\"><span>Machine<\/span>Co-Rotating Twin Screw Extruder (KTE-50B to KTE-135D)<\/a><a class=\"rel\" href=\"\/machines\/pelletizing-systems\/\"><span>Machine<\/span>Pelletizing systems: 7 methods compared<\/a><a class=\"rel\" href=\"\/knowledge\/pelletizing-methods-compared\/\"><span>Knowledge<\/span>Seven pelletizing methods compared<\/a><a class=\"rel\" href=\"\/knowledge\/twin-screw-extruder-size-chart\/\"><span>Knowledge<\/span>Twin screw size chart, 16\u2013135 mm<\/a><\/div><\/div>\n<div class=\"cta\"><div><b>Tell us your material \u2014 we will tell you the line<\/b><p>Send 25\u201350 kg and we run it on our lab extruder: pellets, running video and a capacity report back in 3\u20137 days.<\/p><\/div>\n<div class=\"acts\"><a href=\"\/get-a-quote\/\">Get a quote<\/a>\n<a class=\"alt\" href=\"\/get-a-quote\/#trial\">Send material for trial<\/a><\/div><\/div>\n<\/main>\n<aside><h5>On this page<\/h5><ol><li><a href=\"#answer\">Quick answer<\/a><\/li><li><a href=\"#limit\">What sets the limit<\/a><\/li><li><a href=\"#process\">Process flow<\/a><\/li><li><a href=\"#equipment\">Equipment configuration<\/a><\/li><li><a href=\"#output\">Output by model<\/a><\/li><li><a href=\"#mistakes\">Costly mistakes<\/a><\/li><li><a href=\"#faq\">FAQ<\/a><\/li><\/ol>\n<div class=\"sidecard\"><b>Which line for your filling level?<\/b>\n<p>Below 85% one twin screw is enough; above it, architecture changes. Tell us the number before we talk tonnage.<\/p>\n<a class=\"btn\" href=\"\/get-a-quote\/\">Ask an engineer<\/a>\n<a class=\"btn ghost\" href=\"\/applications\/\">Browse by material<\/a><\/div>\n<\/aside><\/div><\/div>\n<script>\n(function(){\n  var root=document.getElementById('appslider'); if(!root) return;\n  var slides=[].slice.call(root.querySelectorAll('.ms-slide'));\n  var dots=[].slice.call(root.querySelectorAll('.ms-dot'));\n  var cur=0, timer=null, locked=false;\n  function show(i){\n    cur=(i+slides.length)%slides.length;\n    slides.forEach(function(s,j){\n      s.classList.toggle('on', j===cur);\n      var v=s.querySelector('.ms-video');\n      if(j!==cur && v){ var f=v.querySelector('iframe');\n        if(f){ f.remove(); var p=v.querySelector('.ms-play'); if(p) p.style.display=''; } }\n    });\n    dots.forEach(function(d,j){ d.classList.toggle('on', j===cur); });\n    var v=slides[cur].querySelector('.ms-video');\n    if(v){ locked=true; stop(); playVideo(v); }\n  }\n  \/* \u81ea\u52a8\u64ad\u653e\uff1a3s \u4e00\u5f20\uff1b\u60ac\u505c\u6682\u505c\uff0c\u79fb\u51fa\u6062\u590d\uff1b\u8f6e\u5230\u89c6\u9891\u81ea\u52a8\u9759\u97f3\u64ad\u653e\u5e76\u505c\u7559\uff08locked\uff09\uff0c\u624b\u52a8\u5207\u6362\u540e\u6062\u590d\u8f6e\u64ad *\/\n  function start(){ if(timer || document.hidden || locked) return; timer=setInterval(function(){ show(cur+1); }, 3000); }\n  function stop(){ if(timer){ clearInterval(timer); timer=null; } }\n  function playVideo(v){\n    if(v.querySelector('iframe')) return;\n    var f=document.createElement('iframe');\n    f.src='https:\/\/www.youtube.com\/embed\/'+v.dataset.yt+'?autoplay=1&mute=1&rel=0';\n    f.setAttribute('allow','autoplay; encrypted-media; picture-in-picture');\n    f.setAttribute('allowfullscreen','');\n    var p=v.querySelector('.ms-play'); if(p) p.style.display='none';\n    v.insertBefore(f, p);\n  }\n  function manual(i){ locked=false; show(i); start(); }\n  document.addEventListener('visibilitychange', function(){ if(document.hidden) stop(); else start(); });\n  root.addEventListener('mouseenter', stop);\n  root.addEventListener('mouseleave', function(){ if(!locked) start(); });\n  root.querySelector('.prev').addEventListener('click', function(){ manual(cur-1); });\n  root.querySelector('.next').addEventListener('click', function(){ manual(cur+1); });\n  dots.forEach(function(d){ d.addEventListener('click', function(){ manual(+d.dataset.i); }); });\n  root.addEventListener('click', function(e){\n    var p=e.target.closest('.ms-play'); if(!p) return;\n    locked=true; stop(); playVideo(p.parentNode);\n  });\n  show(0);\n  start();\n})();\n<\/script>\n<script type=\"application\/ld+json\">{\"@context\": \"https:\/\/schema.org\", \"@graph\": [{\"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Why air-cooled strand?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"PLA and starch-based compounds are hygroscopic; air cooling avoids re-absorbing water and losing molecular weight.\"}}, {\"@type\": \"Question\", \"name\": \"Can the line run 60% starch?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes, with a dedicated screw configuration and a side feeder for starch; the limiting factor is usually starch dryness, not the machine.\"}}, {\"@type\": \"Question\", \"name\": \"What output can you guarantee for this application?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The reference band is 100\u20131,000 kg\/h, measured on the stated material. We quote a guaranteed figure only after a trial on your own material, because filler grade, bulk density and moisture move output by \u00b115%.\"}}, {\"@type\": \"Question\", \"name\": \"Can we run our material before ordering?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes \u2014 send 25\u201350 kg. We return pellets, a running video and a report with temperatures, screw speed, feeder settings and output per hour. The trial is free; you cover the freight.\"}}, {\"@type\": \"Question\", \"name\": \"What is the delivery time?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"30\u201345 working days for standard configurations, 45\u201370 for custom screw geometry and ODM work. Voltage and frequency are built for the destination country.\"}}]}, {\"@type\": \"BreadcrumbList\", \"itemListElement\": [{\"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/www.kerkepm.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Applications\", \"item\": \"https:\/\/www.kerkepm.com\/applications\/\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"Biodegradable Plastic Extrusion\"}]}]}<\/script>\n<div class=\"wrap\"><section class=\"k3-more\" id=\"rm-more\"><h2>Biodegradable plastic extrusion \u2014 the short version<\/h2><p>Note on biodegradable plastic extrusion: the numbers above are reference ranges from Kerke's own trial runs, not catalogue promises. Screw geometry, wear package and pelletizing method are set on the trial bench first, so the output you compare is the output you get. If your grade is not in the tables, send it \u2014 the closest configuration is usually a change of screw set, not a different machine.<\/p><p class=\"k3-rel\"><b>Related on this site:<\/b> <a href=\"\/machines\/co-rotating-twin-screw-extruder\/\">Machine range: KTE-50B to 135D<\/a> \u00b7 <a href=\"\/knowledge\/pelletizing-methods-compared\/\">Pelletizing methods compared<\/a> \u00b7 <a href=\"\/get-a-quote\/\">quotation and free trial<\/a> \u00b7 <a href=\"https:\/\/en.wikipedia.org\/wiki\/Masterbatch\" target=\"_blank\" rel=\"noopener\">Wikipedia: Masterbatch<\/a><\/p><\/section><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Home\/Applications\/Biodegradable Plastic Extrusion Application \u00b7 Biodegradable &#038; PLA Biodegradable Plastic Extrusion: Protect the Molecules PLA, PBAT and starch blends degrade twice: once in the environment, which is the point, and once in the extruder, which is a scrap batch. The whole line is designed around the second one. A reference biodegradable plastic extrusion page from [&#8230;]\n","protected":false},"author":0,"featured_media":1665,"parent":23,"menu_order":401,"comment_status":"closed","ping_status":"closed","template":"page-blank.php","meta":{"footnotes":""},"application":[46],"app_group":[20],"class_list":["post-44","page","type-page","status-publish","has-post-thumbnail","hentry","application-biodegradable","app_group-biodegradable"],"_links":{"self":[{"href":"https:\/\/kerkepm.com\/es\/wp-json\/wp\/v2\/pages\/44","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kerkepm.com\/es\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/kerkepm.com\/es\/wp-json\/wp\/v2\/types\/page"}],"replies":[{"embeddable":true,"href":"https:\/\/kerkepm.com\/es\/wp-json\/wp\/v2\/comments?post=44"}],"version-history":[{"count":0,"href":"https:\/\/kerkepm.com\/es\/wp-json\/wp\/v2\/pages\/44\/revisions"}],"up":[{"embeddable":true,"href":"https:\/\/kerkepm.com\/es\/wp-json\/wp\/v2\/pages\/23"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/kerkepm.com\/es\/wp-json\/wp\/v2\/media\/1665"}],"wp:attachment":[{"href":"https:\/\/kerkepm.com\/es\/wp-json\/wp\/v2\/media?parent=44"}],"wp:term":[{"taxonomy":"application","embeddable":true,"href":"https:\/\/kerkepm.com\/es\/wp-json\/wp\/v2\/application?post=44"},{"taxonomy":"app_group","embeddable":true,"href":"https:\/\/kerkepm.com\/es\/wp-json\/wp\/v2\/app_group?post=44"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}