{"id":2301,"date":"2026-11-09T21:44:05","date_gmt":"2026-11-09T13:44:05","guid":{"rendered":"https:\/\/kerkepm.com\/cases\/mexico-pa-glass-fiber-compounding\/"},"modified":"2026-11-09T22:20:07","modified_gmt":"2026-11-09T14:20:07","slug":"mexico-pa-glass-fiber-compounding","status":"publish","type":"page","link":"https:\/\/kerkepm.com\/es\/cases\/mexico-pa-glass-fiber-compounding\/","title":{"rendered":"PA glass fiber compounding on a KTE-75D"},"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=\"\/cases\/\">Case studies<\/a><span>\/<\/span>Mexico<\/div><\/div><div class=\"wrap\"><div class=\"hero\">\n<p class=\"kicker\">Case study 9 \u00b7 Mexico \u00b7 PA + short glass fibre<\/p>\n<h1>PA glass fiber compounding on a KTE-75D: shipping damage solved in two days<\/h1>\n<p class=\"dek\">A compounder in Mexico bought a KTE-75D for PA with short glass fibre. The container arrived with damage; photographs went over the same day and the replacement parts left the factory within two. The harder part of PA glass fiber compounding was not the shipping \u2014 it was the drying and the side feeder, and both were set before the first run.<\/p>\n<div class=\"byline\"><div><b>Line<\/b> KTE-75D<\/div><div><b>Material<\/b> PA + short GF<\/div><div><b>Output<\/b> 500\u20131,000 kg\/h<\/div><div><b>Result<\/b> line accepted<\/div><div><b>Updated<\/b> 9 November 2026<\/div><\/div>\n<\/div><\/div>\n<div class=\"wrap\"><div class=\"appmedia\">\n<figure class=\"case-photo\"><img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/11\/case-mexico-pa-glass-fiber-compounding.webp\" alt=\"PA glass fiber compounding KTE-75D line for the Mexico customer before shipment\" loading=\"eager\" fetchpriority=\"high\"><figcaption>PA glass fiber compounding KTE-75D line for the Mexico customer before shipment<\/figcaption><\/figure>\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=\"#situation\">The situation: a high-torque line and a damaged container<\/a><a href=\"#found\">What decides quality in PA glass fiber compounding<\/a><a href=\"#changed\">What was done on site<\/a><a href=\"#result\">Result<\/a><\/nav><h2 id=\"rm-s1\">Quick answer<\/h2><p>PA glass fiber compounding fails on two things: moisture in the resin and fibre broken at the side feeder. This KTE-75D (71 mm, 2\u00d72,100 N\u00b7m, 500\u20131,000 kg\/h) runs dried PA at 120 \u00b0C for 4 hours, feeds 20\u201350% glass downstream at barrels 4\u20136, keeps L\/D 44\u201352 with a bimetallic barrel, and strand-cuts through a die shaped to avoid aligning the fibre. When the container arrived damaged, the parts were replaced in two days, so the schedule held.<\/p><\/section>\n<\/div>\n<\/div><\/div>\n<div class=\"wrap\"><div class=\"grid\"><main>\n<div class=\"stats\"><div class=\"stat\"><b>2 days<\/b><span>damage to dispatch<\/span><\/div><div class=\"stat\"><b>20\u201350%<\/b><span>glass loading<\/span><\/div><div class=\"stat\"><b>44\u201352<\/b><span>L\/D<\/span><\/div><\/div>\n<p class=\"note\">Photograph from the commissioning file for this project; customer names are withheld where requested.<\/p>\n\n<h2 class=\"sec\" id=\"situation\">The situation: a high-torque line and a damaged container<\/h2>\n<p>The customer compounds engineering plastics in central Mexico, mainly PA6 and PA66 with short glass fibre for automotive and electrical customers. The machine is a <a href=\"\/machines\/co-rotating-twin-screw-extruder\/\">KTE-75D<\/a>: 71 mm screws, 2\u00d72,100 N\u00b7m and 200\u2013315 kW, quoted for 500\u20131,000 kg\/h \u2014 the D-series torque class is what makes 30\u201335% glass at that output possible without running out of torque in the mixing zone.<\/p>\n<p>Shipping is the part of an export order nobody controls. The container was handled badly in transit and part of the shipment arrived damaged. The customer photographed it and sent the images the same day; the parts were in a crate and on their way within two days, which kept the installation schedule intact.<\/p>\n\n<h2 class=\"sec\" id=\"found\">What decides quality in PA glass fiber compounding<\/h2>\n<p>Glass-filled PA is judged on impact strength, and impact strength is mostly fibre length. Everything in the line either protects fibre length or destroys it.<\/p>\n<div class=\"tw\"><table><caption><b>Table 1.<\/b> Where fibre length is lost, and what this line does about it.<\/caption>\n<thead><tr><th scope=\"col\">Stage<\/th><th scope=\"col\">Risk<\/th><th scope=\"col\">Setting on this line<\/th><\/tr><\/thead><tbody>\n<tr><td><b>Resin drying<\/b><\/td><td>PA absorbs moisture; hydrolysis drops molecular weight and impact<\/td><td>120 \u00b0C \u00d7 4 h, moisture below 0.1% before the hopper<\/td><\/tr>\n<tr><td><b>Glass feeding<\/b><\/td><td>Feeding into a starved or partly melted section breaks rovings<\/td><td>Side feeder at barrels 4\u20136, after the melt is complete; 2\u20133 feed points for 30% and above<\/td><\/tr>\n<tr><td><b>Screw after the side feeder<\/b><\/td><td>90\u00b0 kneading blocks chop the fibre<\/td><td>Large-lead conveying and moderate shear; toothed elements rather than 90\u00b0 blocks<\/td><\/tr>\n<tr><td><b>Die and cutting<\/b><\/td><td>Die shape aligns fibre, then the cutter snaps it<\/td><td>Die designed for low orientation; strand cut with a water bath, not die-face<\/td><\/tr>\n<tr><td><b>Wear<\/b><\/td><td>Glass abrades the flight tips and barrel wall<\/td><td>Bimetallic barrel, PM screw elements, wear check on schedule<\/td><\/tr>\n<\/tbody><\/table><\/div>\n<p>Two of these are decisions made at quotation for any PA glass fiber compounding line, not at commissioning: the D-series torque class and the wear package. A B-series machine at the same diameter will run 30% glass, and it will run out of torque before it runs out of die pressure \u2014 which shows up as a line that cannot reach its quoted output on a hot day.<\/p>\n\n<h2 class=\"sec\" id=\"changed\">What was done on site<\/h2>\n<ol class=\"flow\">\n<li><b>Damage assessed from photographs<\/b> the day the container was opened: barrel heating zone cover, one die plate, a section of the water bath frame. None of it structural.<\/li>\n<li><b>Replacement dispatched within two days<\/b>, from stock rather than from a production queue \u2014 the reason the schedule held.<\/li>\n<li><b>Drying verified before the first run.<\/b> The customer's dryer was checked against a moisture reading; a dryer that is 15 \u00b0C low looks fine and ruins the compound.<\/li>\n<li><b>Side feeder position and rate set.<\/b> Glass at barrels 4\u20136, feed rate ramped until the melt temperature and torque settled, then locked.<\/li>\n<li><b>Strand line and die set.<\/b> Bath distance and water temperature adjusted for the PA grade; pellets checked for fines and for fibre tufts on the cut face.<\/li>\n<\/ol>\n\n<h2 class=\"sec\" id=\"result\">Result<\/h2>\n<p>The PA glass fiber compounding line reached its quoted output on 30% glass with impact values inside the customer's specification, and the installation finished on the original date despite the container damage. The customer's assessment was about the response rather than the machine:<\/p>\n<div class=\"quoteband\"><b>Customer evaluation, verbatim:<\/b> \u201cWhen there were problems with the goods, you did not shirk responsibility, but immediately came up with solutions. You are a responsible company.\u201d<\/div>\n\n<h2 class=\"sec\" id=\"line\">Line configuration<\/h2>\n<div class=\"tw\"><table><caption><b>Table 2.<\/b> KTE-75D for PA + short glass, as built.<\/caption>\n<thead><tr><th scope=\"col\">Item<\/th><th scope=\"col\">Specification<\/th><\/tr><\/thead><tbody>\n<tr><td>Model<\/td><td>KTE-75D, 71 mm, 2\u00d72,100 N\u00b7m, 200\u2013315 kW<\/td><\/tr>\n<tr><td>Output band<\/td><td>500\u20131,000 kg\/h (PA66 + 30% GF)<\/td><\/tr>\n<tr><td>L\/D<\/td><td>44\u201352<\/td><\/tr>\n<tr><td>Glass feeding<\/td><td>Side feeder at barrels 4\u20136, 20\u201350% loading<\/td><\/tr>\n<tr><td>Wear package<\/td><td>Bimetallic barrel, PM screw elements<\/td><\/tr>\n<tr><td>Filtration<\/td><td>40\u201380 \u00b5m screen changer<\/td><\/tr>\n<tr><td>Pelletizing<\/td><td>Water-bath strand, centrifugal dryer<\/td><\/tr>\n<\/tbody><\/table><\/div>\n\n<h2 class=\"sec\" id=\"transfer\">What transfers to your line<\/h2>\n<div class=\"call warn\"><h4>Three things to specify before the quotation, not after<\/h4>\n<p><b>Torque class<\/b> \u2014 D-series for 30% glass and above at tonnage, because B-series runs out of torque before it runs out of die. <b>Wear package<\/b> \u2014 bimetallic barrel and PM elements; glass is a grinding medium, not a filler. <b>Side feeder position<\/b> \u2014 barrels 4\u20136, after complete melting; feeding glass into unmelted resin is the fastest way to lose fibre length.<\/p><\/div>\n<p>The parameter set is on the <a href=\"\/applications\/glass-fiber-compounding\/\">glass fibre compounding page<\/a>; drying, drying and drying are covered again in the <a href=\"\/knowledge\/twin-screw-extruder-troubleshooting\/\">troubleshooting article<\/a>, because it is the cause of most \"the machine changed\" complaints on PA.<\/p>\n\n<h2 class=\"sec\" id=\"faq\">FAQ<\/h2>\n<details open><summary>What glass loading can a KTE-75D run?<\/summary><p>20\u201350% short glass, with 30\u201335% being the common automotive and electrical specification. Above 40% the die, the wear package and the cutting method all change, and the quotation should say so.<\/p><\/details><details><summary>Why does fibre length matter more than glass content in PA glass fiber compounding?<\/summary><p>Because impact strength tracks fibre length, not the percentage on the certificate. A 30% compound with intact fibre outperforms a 35% compound where the side feeder and the screw after it have chopped the glass.<\/p><\/details><details><summary>Which pelletizing method for glass-filled PA?<\/summary><p>Water-bath strand cutting on a PA glass fiber compounding line, with a die designed to avoid aligning the fibre. Die-face cutting snaps fibre at the die and gives a dustier pellet; it is used where the compound allows it, not as a default.<\/p><\/details><details><summary>What happens if the container arrives damaged?<\/summary><p>Photograph everything before unloading, send the images the same day, and ask for the parts list by position. On this order the replacements were dispatched within two days from stock, which is why the installation date did not move.<\/p><\/details>\n<div class=\"method\"><h2 id=\"rm-s2\">Where this record comes from<\/h2>\n<p>Commissioning reports, service logs and the parameter sheet issued with the line. Machine figures are the quoted bands for the model; process windows follow the Kerke parameter table and are confirmed on a material trial before they become a production setpoint. Where the customer asked not to be named, the country and the application are kept and the company name is not.<\/p>\n<p>Reviewed by the Kerke process team, Nanjing. Case published 9 November 2026.<\/p><\/div>\n<div class=\"related\"><h2 id=\"rm-s3\">Related<\/h2><div class=\"rel-grid\"><a class=\"rel\" href=\"\/applications\/glass-fiber-compounding\/\"><span>Application<\/span>Glass Fiber Compounding 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=\"\/knowledge\/twin-screw-extruder-troubleshooting\/\"><span>Knowledge<\/span>Twin Screw Extruder Troubleshooting: Nine Symptoms, Nine Causes<\/a><a class=\"rel\" href=\"\/cases\/\"><span>Case studies<\/span>All eight field cases<\/a><\/div><\/div>\n<div class=\"pager\"><a href=\"\/cases\/pakistan-small-twin-screw-extruder\/\"><span>Previous case<\/span>Pakistan \u00b7 PE filler masterbatch<\/a><a href=\"\/cases\/korea-tpe-underwater-pelletizing\/\"><span>Next case<\/span>Korea \u00b7 TPE elastomer<\/a><\/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=\"#situation\">The situation: a high-torque line and a damaged container<\/a><\/li><li><a href=\"#found\">What decides quality in PA glass fiber compounding<\/a><\/li><li><a href=\"#changed\">What was done on site<\/a><\/li><li><a href=\"#result\">Result<\/a><\/li><li><a href=\"#line\">Line configuration<\/a><\/li><li><a href=\"#transfer\">What transfers to your line<\/a><\/li><li><a href=\"#faq\">FAQ<\/a><\/li><\/ol>\n<div class=\"sidecard\"><b>Glass-filled PA?<\/b>\n<p>Send the PA grade, the glass percentage and the impact target. Torque class and wear package are decided by those three numbers, and they are decided at quotation.<\/p>\n<a class=\"btn\" href=\"\/get-a-quote\/\">Ask an engineer<\/a>\n<a class=\"btn ghost\" href=\"\/cases\/\">All case studies<\/a><\/div>\n<\/aside><\/div><\/div>\n<script type=\"application\/ld+json\">{\"@context\": \"https:\/\/schema.org\", \"@graph\": [{\"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What glass loading can a KTE-75D run?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"20\u201350% short glass, with 30\u201335% being the common automotive and electrical specification. Above 40% the die, the wear package and the cutting method all change, and the quotation should say so.\"}}, {\"@type\": \"Question\", \"name\": \"Why does fibre length matter more than glass content in PA glass fiber compounding?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Because impact strength tracks fibre length, not the percentage on the certificate. A 30% compound with intact fibre outperforms a 35% compound where the side feeder and the screw after it have chopped the glass.\"}}, {\"@type\": \"Question\", \"name\": \"Which pelletizing method for glass-filled PA?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Water-bath strand cutting on a PA glass fiber compounding line, with a die designed to avoid aligning the fibre. Die-face cutting snaps fibre at the die and gives a dustier pellet; it is used where the compound allows it, not as a default.\"}}, {\"@type\": \"Question\", \"name\": \"What happens if the container arrives damaged?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Photograph everything before unloading, send the images the same day, and ask for the parts list by position. On this order the replacements were dispatched within two days from stock, which is why the installation date did not move.\"}}]}]}<\/script>\n<div class=\"wrap\"><section class=\"k3-more\" id=\"rm-more\"><h2>Pa glass fiber compounding \u2014 the short version<\/h2><p>Note on pa glass fiber compounding: the readings in this record come from the commissioning log of the line described, and the settings are the ones that were left with the customer. Treat them as a starting point for your own material, not as a guarantee \u2014 the same correction on a different filler grade or carrier ends in a different number.<\/p><p class=\"k3-rel\"><b>Related on this site:<\/b> <a href=\"\/applications\/\">Extrusion lines by application<\/a> \u00b7 <a href=\"\/machines\/\">Twin screw extruder types<\/a> \u00b7 <a href=\"\/get-a-quote\/\">free extrusion line quotation<\/a> \u00b7 <a href=\"https:\/\/en.wikipedia.org\/wiki\/Extrusion\" target=\"_blank\" rel=\"noopener\">Wikipedia: Extrusion<\/a><\/p><\/section><\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Home\/Case studies\/Mexico Case study 9 \u00b7 Mexico \u00b7 PA + short glass fibre PA glass fiber compounding on a KTE-75D: shipping damage solved in two days A compounder in Mexico bought a KTE-75D for PA with short glass fibre. The container arrived with damage; photographs went over the same day and the replacement parts left [&#8230;]\n","protected":false},"author":0,"featured_media":2361,"parent":2288,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"page-blank.php","meta":{"footnotes":""},"application":[],"app_group":[],"class_list":["post-2301","page","type-page","status-publish","has-post-thumbnail","hentry"],"_links":{"self":[{"href":"https:\/\/kerkepm.com\/es\/wp-json\/wp\/v2\/pages\/2301","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=2301"}],"version-history":[{"count":0,"href":"https:\/\/kerkepm.com\/es\/wp-json\/wp\/v2\/pages\/2301\/revisions"}],"up":[{"embeddable":true,"href":"https:\/\/kerkepm.com\/es\/wp-json\/wp\/v2\/pages\/2288"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/kerkepm.com\/es\/wp-json\/wp\/v2\/media\/2361"}],"wp:attachment":[{"href":"https:\/\/kerkepm.com\/es\/wp-json\/wp\/v2\/media?parent=2301"}],"wp:term":[{"taxonomy":"application","embeddable":true,"href":"https:\/\/kerkepm.com\/es\/wp-json\/wp\/v2\/application?post=2301"},{"taxonomy":"app_group","embeddable":true,"href":"https:\/\/kerkepm.com\/es\/wp-json\/wp\/v2\/app_group?post=2301"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}