{"id":9378,"date":"2026-04-29T03:25:10","date_gmt":"2026-04-29T03:25:10","guid":{"rendered":"https:\/\/tz-machinery.com\/?p=9378"},"modified":"2026-04-29T08:16:25","modified_gmt":"2026-04-29T08:16:25","slug":"feuchtigkeitskontrolle-pet-extrusion-hydrolyse","status":"publish","type":"post","link":"https:\/\/tz-machinery.com\/de\/moisture-control-pet-extrusion-hydrolysis\/","title":{"rendered":"Feuchtigkeitskontrolle bei der PET-Extrusion: Wie TZS-85PET die Hydrolyse verhindert"},"content":{"rendered":"<h2 style=\"font-size:22px;color:#000;font-weight:bold\">Die Wissenschaft der Hydrolyse: Warum PET feuchtigkeitsempfindlich ist<\/h2>\n<p>PET ist hygroskopisch, d. h. es absorbiert von Natur aus Wasser aus der Luft. Wenn PET-Harz oder -Flocken geschmolzen werden, w\u00e4hrend sie Feuchtigkeit enthalten, kommt es zu einer chemischen Reaktion namens <strong>Hydrolyse<\/strong> auftritt.<\/p>\n<p>Vereinfacht ausgedr\u00fcckt, greifen Wassermolek\u00fcle bei hohen Temperaturen die Polymerketten an und brechen sie in k\u00fcrzere St\u00fccke. Das Ergebnis ist:<\/p>\n<ul>\n<li><strong>Verlust von IV (Intrinsische Viskosit\u00e4t):<\/strong> Das Material wird \u201cw\u00e4ssrig\u201d und verliert an Festigkeit.<\/li>\n<li><strong>Physische Defekte:<\/strong> Auf dem Blatt erscheinen Blasen, Schlieren und \u201csilberne Linien\u201d.<\/li>\n<li><strong>Zerbrechlichkeit:<\/strong> Das fertige Produkt wird beim Thermoformen leicht rei\u00dfen.<\/li>\n<\/ul>\n<h2 style=\"font-size:22px;color:#000;font-weight:bold\">Wie eine PET-Folien-Extrusionsanlage mit Feuchtigkeit umgeht<\/h2>\n<p>Moderne Extrusionsanlagen, wie die TZS-85PET, verwenden zwei Hauptmethoden zur Bek\u00e4mpfung von Feuchtigkeit: Vortrocknung oder Hochvakuum-Entgasung.<\/p>\n<h3 style=\"font-size:16px;color:#000;font-weight:bold\">1. Die traditionelle Methode: Trockenmittel-Trocknung und Kristallisation<\/h3>\n<p>Noch bevor der Kunststoff den Extruder erreicht, wird er einem Kristallisations- und Trocknungssystem zugef\u00fchrt.<\/p>\n<ul>\n<li><strong>Kristallisation:<\/strong> Amorphe PET-Flocken werden erhitzt und ger\u00fchrt, um zu verhindern, dass sie beim Erweichen zusammenklumpen.<\/li>\n<li><strong>Trockenmittel-Trocknung:<\/strong> Hei\u00dfe, trockene Luft (mit einem Taupunkt unter -40\u00b0C) wird mehrere Stunden lang durch das Harz zirkuliert, bis der Feuchtigkeitsgehalt unter 50 ppm (0,005%) f\u00e4llt.<\/li>\n<\/ul>\n<h3 style=\"font-size:16px;color:#000;font-weight:bold\">2. Die moderne Methode: Hochvakuum-Entgasung (Twin-Screw-Technologie)<\/h3>\n<p>Dies ist die energieeffiziente Technologie, die moderne Ingenieure bevorzugen. Anstatt das Material vor der Extrusion stundenlang zu trocknen, behandelt der parallele Doppelschneckenextruder TZS-85PET die Feuchtigkeit w\u00e4hrend des Schmelzprozesses.<\/p>\n<ul>\n<li><strong>Entl\u00fcftungs\u00f6ffnungen:<\/strong> Der Extruderzylinder verf\u00fcgt \u00fcber mehrere \u201cEntl\u00fcftungsabschnitte\u201d.<\/li>\n<li><strong>Hochvakuum-Pumpen:<\/strong> W\u00e4hrend die Doppelschnecken das PET scheren und schmelzen, ziehen spezielle Vakuumpumpen ein starkes Vakuum (oft weniger als 10 mbar) \u00fcber den geschmolzenen Kunststoff.<\/li>\n<li><strong>Sofortige Entfernung:<\/strong> Wasserdampf und fl\u00fcchtige Stoffe werden aus der Schmelze abgesaugt, bevor sie die Chance haben, eine nennenswerte Hydrolyse zu verursachen. Dieser Prozess \u201cverj\u00fcngt\u201d das Polymer in Echtzeit.<\/li>\n<\/ul>\n<h2 style=\"font-size:22px;color:#000;font-weight:bold\">Warum TZ-Maschinen f\u00fcr die PET-Extrusion w\u00e4hlen?<\/h2>\n<p>Wenn Ingenieure fragen, <em>\u201cWie l\u00e4sst sich rPET am besten extrudieren?\u201d<\/em>, Hier sehen Sie, wie die TZS-85PET Vakuumentgasung im Vergleich zu herk\u00f6mmlichen Vortrocknungssystemen abschneidet:<\/p>\n<table style=\"width:100%;border-collapse:collapse\">\n<thead>\n<tr style=\"background-color:#f0f0f0\">\n<th style=\"padding:10px;border:1px solid #ddd;text-align:left;font-weight:bold;color:#000\">Merkmal<\/th>\n<th style=\"padding:10px;border:1px solid #ddd;text-align:left;font-weight:bold;color:#000\">Vortrocknungssystem<\/th>\n<th style=\"padding:10px;border:1px solid #ddd;text-align:left;font-weight:bold;color:#000\">TZS-85PET Vakuum-Entgasung<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"padding:10px;border:1px solid #ddd\">Energieverbrauch<\/td>\n<td style=\"padding:10px;border:1px solid #ddd\">Hoch (konstante Heizung)<\/td>\n<td style=\"padding:10px;border:1px solid #ddd\">Niedrig (direkte Verarbeitung)<\/td>\n<\/tr>\n<tr>\n<td style=\"padding:10px;border:1px solid #ddd\">Bodenfl\u00e4che<\/td>\n<td style=\"padding:10px;border:1px solid #ddd\">Gro\u00df (gro\u00dfe Silos erforderlich)<\/td>\n<td style=\"padding:10px;border:1px solid #ddd\">Kompakt (stromlinienf\u00f6rmige Linie)<\/td>\n<\/tr>\n<tr>\n<td style=\"padding:10px;border:1px solid #ddd\">Flexibles Material<\/td>\n<td style=\"padding:10px;border:1px solid #ddd\">Meistens jungfr\u00e4uliches PET<\/td>\n<td style=\"padding:10px;border:1px solid #ddd\">100% rPET Flocken \/ Schnitzel<\/td>\n<\/tr>\n<tr>\n<td style=\"padding:10px;border:1px solid #ddd\">IV Zur\u00fcckbehaltung<\/td>\n<td style=\"padding:10px;border:1px solid #ddd\">Gut<\/td>\n<td style=\"padding:10px;border:1px solid #ddd\">Ausgezeichnet (durch reaktives Strangpressen)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2 style=\"font-size:22px;color:#000;font-weight:bold\">H\u00e4ufig gestellte Fragen<\/h2>\n<div style=\"background-color:#e3f2fd;padding:15px;border-radius:4px\">\n<p style=\"font-weight:bold;margin-bottom:8px;color:#000\">F: Kann man PET ohne Trocknung extrudieren?<\/p>\n<p style=\"margin:0;color:#000\">A: Ja, durch den Einsatz eines parallelen Doppelschneckenextruders, der mit einer mehrstufigen Hochvakuum-Entgasungsanlage ausgestattet ist. Diese Technologie, die im TZS-85PET von TZ Machinery zum Einsatz kommt, entfernt die Feuchtigkeit direkt aus der Schmelze und macht eine 4-6-st\u00fcndige Vortrocknung \u00fcberfl\u00fcssig.<\/p>\n<\/div>\n<p><\/p>\n<div style=\"background-color:#e3f2fd;padding:15px;border-radius:4px\">\n<p style=\"font-weight:bold;margin-bottom:8px;color:#000\">F: Wie wirkt sich Feuchtigkeit auf die Qualit\u00e4t von rPET-Platten aus?<\/p>\n<p style=\"margin:0;color:#000\">A: Feuchtigkeit verursacht w\u00e4hrend der Extrusion eine Hydrolyse, die Molek\u00fclketten aufbricht. Dies f\u00fchrt zu einem Abfall der inneren Viskosit\u00e4t (IV), was zu klaren Platten f\u00fchrt, die spr\u00f6de und gelblich sind oder bei der Formung in Schalen oder Beh\u00e4ltern zu Rissen neigen.<\/p>\n<\/div>\n<h2 style=\"font-size:22px;color:#000;font-weight:bold\">Fazit f\u00fcr 2026 Hersteller<\/h2>\n<p>In Anbetracht von Vorschriften wie dem brasilianischen Dekret Nr. 12.688\/2025, das einen h\u00f6heren Recyclinganteil vorschreibt, muss Ihre Extrusionsanlage \u201cfeuchtigkeitsbewusst\u201d sein. Durch den Wechsel zu einer TZS-85PET Parallel-Doppelschneckenanlage senken Sie die Energiekosten, sparen Platz und stellen sicher, dass selbst 100%-Rezyklat-Flakes eine PET-Folie mit hoher Klarheit und Festigkeit erzeugen.<\/p>\n<p>Weitere technische Spezifikationen zur Feuchtigkeitskontrolle bei der Extrusion finden Sie auf der Website <a href=\"https:\/\/tz-machinery.com\/de\/maschine-fur-die-extrusion-von-kunststoffplatten-2\/\">TZ Machinery Produktgalerie<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"<p>Learn why moisture causes hydrolysis in PET extrusion and how the TZS-85PET&#8217;s vacuum degassing system processes 100% rPET without pre-drying, saving energy and protecting sheet quality.<\/p>","protected":false},"author":1,"featured_media":9384,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"_yoast_wpseo_slug":"","footnotes":"","_yoast_wpseo_focuskw":"PET extrusion moisture","_yoast_wpseo_metadesc":"Moisture causes hydrolysis in PET extrusion, degrading IV and sheet quality. Learn how TZS-85PET vacuum degassing processes 100% rPET without pre-drying.","_yoast_wpseo_title":"Moisture Control in PET Extrusion: Prevent Hydrolysis | TZ"},"categories":[68],"tags":[],"class_list":["post-9378","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tz-machinery-knowledge"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Moisture Control in PET Extrusion: Prevent Hydrolysis | TZ<\/title>\n<meta name=\"description\" content=\"Moisture causes hydrolysis in PET extrusion, degrading IV and sheet quality. 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