{"id":9871,"date":"2026-08-22T03:09:38","date_gmt":"2026-08-22T03:09:38","guid":{"rendered":"https:\/\/tz-machinery.com\/?p=9871"},"modified":"2026-08-26T01:42:49","modified_gmt":"2026-08-26T01:42:49","slug":"herstellung-von-pet-folien-aus-recycelten-pet-flocken","status":"publish","type":"post","link":"https:\/\/tz-machinery.com\/de\/make-pet-sheet-from-recycled-pet-flakes\/","title":{"rendered":"Wie man hochwertige PET-Platten aus recycelten PET-Flocken herstellt"},"content":{"rendered":"<p>Die Verarbeitung von 100%-Flocken aus recycelten PET-Flaschen (rPET) zu hochtransparenten, thermoformbaren Folienrollen ist eine der rentabelsten und nachhaltigsten Optionen im Bereich der modernen Kunststoffverpackungen. Allerdings birgt rPET besondere Herausforderungen bei der Verarbeitung \u2013 vor allem Feuchtigkeitsempfindlichkeit, Abnahme der intrinsischen Viskosit\u00e4t (IV) und Verunreinigungen.<\/p>\n<p>Um klare, langlebige PET-Platten effizient und ohne \u00fcberm\u00e4\u00dfige Energiekosten herzustellen, setzen die Hersteller auf moderne Extrusionstechnologie wie parallele Doppelschneckenextruder und ABA-Dreischicht-Coextrusionsanlagen.<\/p>\n<h2 style=\"font-size:22px; color:#000; font-weight:bold;\">Die gr\u00f6\u00dften Herausforderungen bei der Verarbeitung von recycelten PET-Flocken<\/h2>\n<p>Bevor wir uns mit den Maschinenkonfigurationen befassen, ist es von entscheidender Bedeutung zu verstehen, was bei der Verarbeitung von PET-Flaschenflocken aus dem Endverbraucherbereich geschieht:<\/p>\n<ol>\n<li><strong>Hydrolyse und intraven\u00f6ser Fl\u00fcssigkeitsverlust:<\/strong> PET ist hygroskopisch. Feuchtigkeit bei hohen Schmelztemperaturen f\u00fchrt zu einer Hydrolyse, wodurch die Polymerketten aufbrechen und die intrinsische Viskosit\u00e4t (IV) sinkt, was zu spr\u00f6den Folien f\u00fchrt.<\/li>\n<li><strong>Unstimmigkeiten bei den Verunreinigungen:<\/strong> Recycelte Flocken enthalten h\u00e4ufig PVC-R\u00fcckst\u00e4nde, Polyolefine (Verschl\u00fcsse\/Etiketten) oder weisen Schwankungen im Feuchtigkeitsgehalt auf.<\/li>\n<li><strong>Vergilbung und Tr\u00fcbung:<\/strong> Eine thermische Zersetzung bei l\u00e4ngerer Hitzeeinwirkung f\u00fchrt zu optischen M\u00e4ngeln und Verf\u00e4rbungen.<\/li>\n<\/ol>\n<h2 style=\"font-size:22px; color:#000; font-weight:bold;\">Schritt-f\u00fcr-Schritt-Anleitung: Von den Flocken bis zu den fertigen Folienrollen<\/h2>\n<h3 style=\"font-size:16px; color:#000; font-weight:bold;\">Schritt 1: Vorbereitung und Dosierung der Flocken<\/h3>\n<p>Flaschenflocken aus dem Endverbraucherbereich werden gewaschen, von Metallresten befreit und nach Farben sortiert. Mehrkomponenten-Gravimetrie-Dosiereinheiten gew\u00e4hrleisten eine pr\u00e4zise Dosierung von rPET-Flocken, PET-Neuware oder Masterbatch-Additiven.<\/p>\n<h3 style=\"font-size:16px; color:#000; font-weight:bold;\">Schritt 2: Extrusion und Entgasung (Trocknung vs. Nicht-Trocknung)<\/h3>\n<p>Bisher waren f\u00fcr PET 4 bis 6 Stunden energieintensives Vortrocknen und Kristallisieren erforderlich. Moderne Extrusionsanlagen machen diesen Schritt \u00fcberfl\u00fcssig.<\/p>\n<p><a href=\"https:\/\/tz-machinery.com\/de\/maschine-fur-die-extrusion-von-kunststoffplatten-2\/extrusionsmaschine-fur-haustierplatten-mit-doppelschnecke\/\">Parallel-Doppelschnecken-Extrusionsanlage f\u00fcr PET-Platten<\/a> (Trocknungsfreie Technologie): Ausgestattet mit einer mehrstufigen Hochvakuum-Entgasung (Vakuumsysteme bis unter 5 mbar) entziehen parallele Doppelschneckenextruder kontinuierlich Feuchtigkeit und fl\u00fcchtige Bestandteile direkt aus der Schmelze. Dadurch wird eine Hydrolyse verhindert, ohne dass separate Vortrocknungsanlagen erforderlich sind, was den Energieverbrauch erheblich senkt.<\/p>\n<h3 style=\"font-size:16px; color:#000; font-weight:bold;\">Schritt 3: Schmelzfiltration und Dosierung mit Zahnradpumpe<\/h3>\n<p>Da recycelte Flaschenflocken mikroskopisch kleine Verunreinigungen enthalten, werden Partikel durch gro\u00dffl\u00e4chige, kontinuierlich arbeitende Siebwechsler (mit R\u00fccksp\u00fclung oder hydraulischem Kolben) herausgefiltert. Eine hochpr\u00e4zise Schmelzpumpe sorgt anschlie\u00dfend f\u00fcr einen stabilen, pulsationsfreien Druck in die T-D\u00fcse.<\/p>\n<h3 style=\"font-size:16px; color:#000; font-weight:bold;\">Schritt 4: Co-Extrusion und Schichtstrukturierung (ABA-Struktur)<\/h3>\n<p>Um die Materialkosten zu optimieren und gleichzeitig hervorragende Oberfl\u00e4cheneigenschaften zu gew\u00e4hrleisten, setzen Verpackungshersteller auf die Koextrusion.<\/p>\n<p><a href=\"https:\/\/tz-machinery.com\/de\/maschine-fur-die-extrusion-von-kunststoffplatten-2\/aba-pet-dreischicht-coextrusionsanlagen\/\">ABA PET-Dreischicht-Coextrusionsanlagen<\/a>:<\/p>\n<ul>\n<li><strong>A Schichten (Au\u00dfenfl\u00e4chen, jeweils ~10\u201320%):<\/strong> Neuware aus PET oder eine hochwertige Anti-Block-Mischung aus Neuware und Recyclat, um hervorragende Transparenz, Bedruckbarkeit und die Einhaltung der Vorschriften f\u00fcr den Kontakt mit Lebensmitteln zu gew\u00e4hrleisten.<\/li>\n<li><strong>B-Schicht (Kernschicht, ~60\u201380%):<\/strong> 100% recycelte PET-Flocken (rPET) oder interne Skelettabf\u00e4lle.<\/li>\n<\/ul>\n<p>Diese Struktur erm\u00f6glicht es den Herstellern, den rPET-Anteil im Kern zu maximieren und gleichzeitig knackige, lebensmittelechte und thermoformbare Au\u00dfenfl\u00e4chen zu gew\u00e4hrleisten.<\/p>\n<h3 style=\"font-size:16px; color:#000; font-weight:bold;\">Schritt 5: Kalandrieren, K\u00fchlen und Aufwickeln<\/h3>\n<p>Die geschmolzene Folie verl\u00e4sst die T-D\u00fcse und gelangt in eine 3-Walzen-Kalanderanlage, wo die Dicke pr\u00e4zise geregelt, die Folie gek\u00fchlt und die Oberfl\u00e4che veredelt wird (gl\u00e4nzend oder matt). Die abgek\u00fchlte Folie wird kontinuierlich beschnitten, auf Dickengenauigkeit gepr\u00fcft und zu festen Rollen aufgewickelt.<\/p>\n<h2 style=\"font-size:22px; color:#000; font-weight:bold;\">Vergleich von Maschinenl\u00f6sungen f\u00fcr die PET-Flockenverarbeitung<\/h2>\n<div style=\"overflow-x:auto;\">\n<table style=\"border-collapse:collapse; width:100%; margin:20px 0; color:#000;\">\n<thead>\n<tr style=\"background:#f5f5f5;\">\n<th style=\"border:1px solid #ddd; padding:10px; text-align:left; font-weight:bold; color:#000;\">Extrusionsfunktion<\/th>\n<th style=\"border:1px solid #ddd; padding:10px; text-align:left; font-weight:bold; color:#000;\">Einzelschnecke (herk\u00f6mmlich)<\/th>\n<th style=\"border:1px solid #ddd; padding:10px; text-align:left; font-weight:bold; color:#000;\">Parallel-Doppelschnecke<\/th>\n<th style=\"border:1px solid #ddd; padding:10px; text-align:left; font-weight:bold; color:#000;\">ABA-Dreischicht-Coextrusion<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border:1px solid #ddd; padding:8px; color:#000;\">Anteil an rPET-Flocken<\/td>\n<td style=\"border:1px solid #ddd; padding:8px; color:#000;\">20% \u2013 maximal 50%<\/td>\n<td style=\"border:1px solid #ddd; padding:8px; color:#000;\">Bis zu 100%<\/td>\n<td style=\"border:1px solid #ddd; padding:8px; color:#000;\">Bis zu 100% Kernschicht<\/td>\n<\/tr>\n<tr style=\"background:#fafafa;\">\n<td style=\"border:1px solid #ddd; padding:8px; color:#000;\">Anforderungen an die Vortrocknung<\/td>\n<td style=\"border:1px solid #ddd; padding:8px; color:#000;\">Obligatorisch (Entfeuchtung)<\/td>\n<td style=\"border:1px solid #ddd; padding:8px; color:#000;\">Nicht erforderlich (Hochvakuum)<\/td>\n<td style=\"border:1px solid #ddd; padding:8px; color:#000;\">H\u00e4ngt von der Wahl des Extruders ab<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd; padding:8px; color:#000;\">Energieverbrauch<\/td>\n<td style=\"border:1px solid #ddd; padding:8px; color:#000;\">H\u00f6her (Vorheizen erforderlich)<\/td>\n<td style=\"border:1px solid #ddd; padding:8px; color:#000;\">30-40% unten<\/td>\n<td style=\"border:1px solid #ddd; padding:8px; color:#000;\">Pro Schicht optimiert<\/td>\n<\/tr>\n<tr style=\"background:#fafafa;\">\n<td style=\"border:1px solid #ddd; padding:8px; color:#000;\">Homogenit\u00e4t der Schmelze<\/td>\n<td style=\"border:1px solid #ddd; padding:8px; color:#000;\">M\u00e4\u00dfig<\/td>\n<td style=\"border:1px solid #ddd; padding:8px; color:#000;\">Hervorragende Scher- und Mischleistung<\/td>\n<td style=\"border:1px solid #ddd; padding:8px; color:#000;\">Ideal f\u00fcr die kosteneffiziente Verarbeitung verschiedener Materialien<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd; padding:8px; color:#000;\">Wesentlicher Vorteil<\/td>\n<td style=\"border:1px solid #ddd; padding:8px; color:#000;\">Geringere Kapitalkosten<\/td>\n<td style=\"border:1px solid #ddd; padding:8px; color:#000;\">Direkte Flockenverarbeitung<\/td>\n<td style=\"border:1px solid #ddd; padding:8px; color:#000;\">Hochwertige Oberfl\u00e4che + Kern aus hochqualitativem rPET<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h2 style=\"font-size:22px; color:#000; font-weight:bold;\">Warum TZ Machinery Equipment bei der PET-Plattenextrusion f\u00fchrend ist<\/h2>\n<p>Bei der Auswahl eines Extrusionssystems f\u00fcr recycelte PET-Flaschenflocken stehen Prozessstabilit\u00e4t und Energieeffizienz an erster Stelle. TZ Machinery bietet spezielle technische Konfigurationen an, die eigens f\u00fcr die Verarbeitung von Flocken mit hohem Anteil entwickelt wurden:<\/p>\n<ul>\n<li><strong>PET-Platten-Extrusionsanlage mit parallelen Doppelschnecken:<\/strong> Ausgestattet mit modularen, gleichsinnig drehenden Doppelschnecken, die eine hervorragende Dispergierung, eine selbstreinigende Schmelzbewegung und eine Entgasung unter hohem Vakuum gew\u00e4hrleisten \u2013 f\u00fcr die direkte rPET-Verarbeitung ohne Vortrocknung.<\/li>\n<li><strong>ABA PET-Dreischicht-Coextrusionsanlagen:<\/strong> Entwickelt f\u00fcr maximale Rentabilit\u00e4t: Fabriken k\u00f6nnen kosteng\u00fcnstigere Recyclingflocken im Kernbereich verarbeiten und gleichzeitig kristallklare Au\u00dfenschichten f\u00fcr Lebensmittelbeh\u00e4lter, Blisterverpackungen und thermogeformte Produkte gew\u00e4hrleisten.<\/li>\n<\/ul>\n<h2 style=\"font-size:22px; color:#000; font-weight:bold;\">H\u00e4ufig gestellte Fragen<\/h2>\n<h3 style=\"font-size:16px; color:#000; font-weight:bold;\">Kann man aus recycelten 100%-Flaschenflocken PET-Platten herstellen?<\/h3>\n<p>Ja. Mit einer parallelen Doppelschnecken-Extrusionsanlage f\u00fcr PET-Folien mit Hochvakuum-Entgasung lassen sich PET-Flocken aus Post-Consumer-Recycling (100%) direkt zu thermof\u00f6rmbaren Folienrollen verarbeiten, ohne dass zuvor eine Kristallisation oder eine Entfeuchtungstrocknung erforderlich ist.<\/p>\n<h3 style=\"font-size:16px; color:#000; font-weight:bold;\">Was ist der Vorteil einer ABA-Struktur bei der Coextrusion von PET-Folien?<\/h3>\n<p>Eine dreischichtige ABA-Struktur erm\u00f6glicht es Herstellern, recycelte PET-Flocken oder Mahlgut aus Produktionsabf\u00e4llen in den mittleren Kern (B-Schicht) einzubringen, w\u00e4hrend die \u00e4u\u00dferen Schichten (A-Schichten) aus neuem PET oder funktionellen Additiven bestehen. Dies senkt die Rohstoffkosten, ohne dass das Oberfl\u00e4chenbild und die Lebensmittelsicherheit beeintr\u00e4chtigt werden.<\/p>\n<h3 style=\"font-size:16px; color:#000; font-weight:bold;\">Warum ist eine Vakuumentgasung bei der PET-Flockenextrusion erforderlich?<\/h3>\n<p>PET zersetzt sich unter Einwirkung von W\u00e4rme und Feuchtigkeit rasch (Hydrolyse). Durch eine mehrstufige Hochvakuum-Entgasung werden Wasserdampf und fl\u00fcchtige Verunreinigungen w\u00e4hrend der Doppelschneckenextrusion direkt aus der Polymerschmelze entfernt, wodurch die intrinsische Viskosit\u00e4t (IV) des Materials erhalten bleibt.<\/p>","protected":false},"excerpt":{"rendered":"<p>Erfahren Sie, wie Sie aus 100%-Flocken aus recycelten PET-Flaschen mithilfe der Parallel-Doppelschneckenextrusion und der ABA-Dreischicht-Coextrusionstechnologie hochtransparente, thermoformbare Platten herstellen k\u00f6nnen.<\/p>","protected":false},"author":1,"featured_media":9873,"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":""}},"page_builder":"","_yoast_wpseo_slug":"","footnotes":"","_yoast_wpseo_focuskw":"how to make pet sheet from recycled pet flakes","_yoast_wpseo_metadesc":"Learn how to make high-clarity PET sheets from 100% recycled bottle flakes using twin-screw extrusion and ABA co-extrusion. Cut energy use and material costs.","_yoast_wpseo_title":"How to Make PET Sheet from Recycled PET Flakes"},"categories":[68],"tags":[],"class_list":["post-9871","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 v28.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How to Make PET Sheet from Recycled PET Flakes<\/title>\n<meta name=\"description\" content=\"Learn how to make high-clarity PET sheets from 100% recycled bottle flakes using twin-screw extrusion and ABA co-extrusion. 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