{"id":13919,"date":"2026-04-19T19:08:19","date_gmt":"2026-04-20T02:08:19","guid":{"rendered":"https:\/\/www.recyclemachine.net\/"},"modified":"2026-06-08T17:57:31","modified_gmt":"2026-06-09T00:57:31","slug":"pvcyi-pet-botta-geri-donusum-hatlarinda-50-ppm-altinda-nasil-kontrol-edebilirsiniz","status":"publish","type":"post","link":"https:\/\/www.recyclemachine.net\/tr\/pvcyi-pet-botta-geri-donusum-hatlarinda-50-ppm-altinda-nasil-kontrol-edebilirsiniz\/","title":{"rendered":"PET Bottlesinde PVC'yi 50 ppm Alt\u0131nda Kontrol Etme Yollar\u0131"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Controlling PVC contamination is one of the toughest challenges in PET bottle recycling, especially when you target high-end applications and food-grade rPET. Even at concentrations around 50 ppm, PVC can damage PET quality, causing brittleness, yellowing and unwanted by-products during extrusion. For PET recyclers, keeping PVC as low as possible is not just a technical requirement \u2013 it directly impacts selling price, customer acceptance and long-term profitability.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In this article, we look at where PVC comes from in a typical PET bottle line, what \u201cgood\u201d looks like in terms of ppm levels, and how a combination of front-end sorting, washing and dry electrostatic separation can help you reliably stay below 50 ppm.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><strong>TL;DR (for plant managers &amp; buyers)<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>PVC can cause serious PET degradation even around <strong>50 ppm<\/strong>.<\/li>\n\n\n\n<li>The most effective strategy is <strong>prevent PVC before grinding<\/strong>, then use <strong>washing + float-sink<\/strong> for bulk cleaning, and a <strong>dry polishing step<\/strong> (often electrostatic) to remove trace PVC.<\/li>\n\n\n\n<li>Prove performance with <strong>routine testing + trend monitoring<\/strong>, not one-off samples.<\/li>\n<\/ul>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">Why 50 ppm PVC matters so much<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Multiple industry sources point out that PVC contamination at or even below 50 ppm can already trigger quality issues in PET flakes when they are remelted. PVC degrades and releases chlorine-containing compounds at PET processing temperatures, which can:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Promote chain scission and embrittlement in the PET resin.<\/li>\n\n\n\n<li>Cause yellowing or off-color in pellets and final products.<\/li>\n\n\n\n<li>Corrode processing equipment and complicate exhaust gas treatment.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">For high-end applications such as food-contact rPET, bottle-to-bottle recycling and premium polyester fibers, buyers often require PVC levels below 50 ppm \u2013 and in some cases below 30 ppm \u2013 as part of their specifications. This means PET recyclers need a process that consistently delivers this quality, not just in lab samples but in full-scale, 24\/7 operation.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Typical sources of PVC in PET bottle streams<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">In a PET bottle recycling line, PVC can enter the system from several sources:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Whole PVC bottles and containers that slip through front-end sorting.<\/li>\n\n\n\n<li>Shrink sleeves, labels and safety seals made from PVC or PETG.<\/li>\n\n\n\n<li>Cap liners, multilayer components and residual films in the bale mix.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Even when PVC is only a small fraction of the incoming bales, its impact on the final flake quality is disproportionate. A contamination level of 50 ppm corresponds to only about 0.05 kg PVC per 1,000 kg of PET flakes \u2013 a tiny amount in mass, but enough to compromise high-spec applications.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What \u201cbelow 50 ppm\u201d looks like in practice<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Technical datasheets and buyer specifications for high-quality rPET flakes often list maximum PVC limits in the range of 10\u201350 ppm, combined with tight limits on other polymers. For example, some clear rPET flake specs call for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>PVC below 10\u201350 ppm.<\/li>\n\n\n\n<li>Toplam yabanc\u0131 polimerler 80\u2013100 ppm alt\u0131nda.<\/li>\n\n\n\n<li>Toplam flake purity &gt;99.8% a\u011f\u0131rl\u0131k baz\u0131nda.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Bu say\u0131lara g\u00fcvenilir bir \u015fekilde ula\u015fmak, tek bir \u201csihirli\u201d makinenin \u00f6tesindedir. Ba\u015far\u0131l\u0131 tesisler, hatlar\u0131n\u0131 takviyeli ad\u0131mlar olarak tasarlar:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Bale incelemesi ve \u00f6n-s\u0131ralama.<\/li>\n\n\n\n<li>El yap\u0131m\u0131 ve\/veya otomatik \u015fi\u015fe s\u0131ralama.<\/li>\n\n\n\n<li>Etiket kald\u0131rma ve boyut azaltma.<\/li>\n\n\n\n<li>So\u011fuk ve s\u0131cak y\u0131kama.<\/li>\n\n\n\n<li>Y\u00fczen ve yo\u011funluk ay\u0131rma.<\/li>\n\n\n\n<li>Kurutma ve son kurutma \/ cilalama a\u015famalar\u0131.<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">Elektrostatik ayr\u0131m, bu zincirin sonunda kuru cilalama teknolojisi olarak yer al\u0131r ve zaten y\u0131kanm\u0131\u015f, kurutulmu\u015f PET flakelerinden PVC ve di\u011fer polimerlerin son izlerini kald\u0131r\u0131r.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Ba\u015flang\u0131\u00e7: Olabildi\u011fince fazla PVC'yi d\u0131\u015far\u0131da tutma<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">PVC'ye kar\u015f\u0131 ilk savunma hatt\u0131, basit\u00e7e onun flake ak\u0131\u015f\u0131na girmesine izin vermemektir. Ortak stratejiler \u015funlard\u0131r:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>UV veya g\u00f6rsel yard\u0131mlarla el yap\u0131m\u0131 s\u0131ralama:<\/strong> Uzman operat\u00f6rler PVC \u015fi\u015felerini ve etiketlerini tan\u0131yabilir ve UV ayd\u0131nlatma PET ve PVC aras\u0131ndaki kontrast\u0131 art\u0131rabilir.<\/li>\n\n\n\n<li><strong>NIR tabanl\u0131 \u015fi\u015fe s\u0131ralay\u0131c\u0131lar:<\/strong> Yak\u0131n k\u0131z\u0131l\u00f6tesi optik s\u0131ralay\u0131c\u0131lar \u015fi\u015feleri polimer t\u00fcr\u00fcne g\u00f6re s\u0131n\u0131fland\u0131r\u0131r ve par\u00e7alama \u00f6ncesinde PVC, PETG ve di\u011fer istenmeyen maddeleri atar.<\/li>\n\n\n\n<li><strong>Mekanik ve etiket kald\u0131rma a\u015famalar\u0131:<\/strong> Etiket kald\u0131rma sistemleri ve \u00f6n-y\u0131kama a\u015famalar\u0131, etiketleri ve etiketleri \u00e7\u0131kar\u0131r, a\u015fa\u011f\u0131 ak\u0131\u015f PVC y\u00fck\u00fcn\u00fc azalt\u0131r.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Bu teknolojiler, tam \u015fi\u015feler ve b\u00fcy\u00fck par\u00e7alarda son derece etkili olsa da, k\u00fc\u00e7\u00fck par\u00e7alar ve kar\u0131\u015f\u0131k flakeler i\u00e7in m\u00fckemmel de\u011fildirler ve PVC miktar\u0131n\u0131 rendeleme ve y\u0131kama b\u00f6l\u00fcmlerine gelen miktar\u0131 \u00f6nemli \u00f6l\u00e7\u00fcde azaltamazlar.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Y\u0131kama, y\u00fczen-kal\u0131r ve ne yapabilecekleri (ve yapamayacaklar\u0131)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">PET \u015fi\u015fe hatlar\u0131n\u0131n \u00e7o\u011fu, yap\u0131\u015ft\u0131r\u0131c\u0131lar, ka\u011f\u0131t, organik maddeler ve d\u00fc\u015f\u00fck yo\u011funluklu kirletici maddeleri kald\u0131rmak i\u00e7in s\u0131cak y\u0131kama, frizaj y\u0131kama ve y\u00fczen-kal\u0131r ay\u0131rma kombinasyonuna g\u00fcvenir. Tipik bir s\u00fcre\u00e7te:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>S\u0131v\u0131 rendele\u00e7iler \u015fi\u015feleri flakelere indirir.<\/li>\n\n\n\n<li>Frizaj y\u0131kay\u0131c\u0131lar ve s\u0131cak y\u0131kama tanklar\u0131 etiketleri, kir ve yap\u0131\u015ft\u0131r\u0131c\u0131lar\u0131 temizler.<\/li>\n\n\n\n<li><a href=\"https:\/\/www.recyclemachine.net\/tr\/pet-pulu-aritma-ayirma-tanki\/\">Float-sink tanks<\/a> separate polyolefins (PP\/HDPE) from PET based on density.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Bu ad\u0131mlar, genel kirleticiyi azaltmak ve PET'i kapa\u011f\u0131n ve etiketlerden ay\u0131rmak i\u00e7in m\u00fckemmel \u00e7al\u0131\u015f\u0131r. Ancak, PET ve PVC aras\u0131ndaki yo\u011funluk farklar\u0131 nispeten k\u00fc\u00e7\u00fck ve bir\u00e7ok yo\u011funluk tabanl\u0131 sistem PVC kald\u0131rma i\u00e7in \u00f6zel olarak optimize edilmemi\u015ftir. Bu nedenle, ek cilalama ad\u0131m\u0131 kullan\u0131lmazsa, iyi tasarlanm\u0131\u015f y\u0131kama hatlar\u0131 bile 100\u2013200 ppm'nin \u00fczerinde PVC seviyeleri olan PET flakeleri teslim edebilir.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Her ad\u0131m\u0131n ger\u00e7ekten neyi kald\u0131rabilece\u011fi (h\u0131zl\u0131 referans)<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Ad\u0131m<\/th><th>En iyi kald\u0131rma<\/th><th>PVC kontrol s\u0131n\u0131rlar\u0131<\/th><\/tr><\/thead><tbody><tr><td>Ba\u015flang\u0131\u00e7 s\u0131ralama (el yap\u0131m\u0131 \/ optik)<\/td><td>Tam PVC konteynerleri, belirgin off-spec maddeler<\/td><td>Small fragments and mixed flakes can slip through<\/td><\/tr><tr><td>De-labelling \/ sleeve removal<\/td><td>Sleeves, labels, seals before they become fragments<\/td><td>Less effective once material is shredded into small pieces<\/td><\/tr><tr><td>Hot wash + friction wash<\/td><td>Glue, dirt, organics; improves overall cleanliness<\/td><td>Cleaning does not equal polymer separation; PVC can remain<\/td><\/tr><tr><td>Float-sink<\/td><td>PP\/HDPE vs PET separation (caps\/labels)<\/td><td>PET vs PVC density separation is not consistently sharp<\/td><\/tr><tr><td>Dry polishing (often electrostatic)<\/td><td>Trace PVC and other polymers in dry flakes<\/td><td>Requires tight moisture and particle-size control<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Why dry electrostatic separation is needed as a polishing step<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">To push PVC levels below 50 ppm, many recyclers add a <strong>dry electrostatic separation<\/strong> stage after drying. Electrostatic separators exploit differences in electrical properties between PET and PVC:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For a practical equipment overview, see: <a href=\"https:\/\/www.rumtoo.com\/plastic-electrostatic-separator\/\">Plastic Electrostatic Separator<\/a><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Flakes are exposed to a charging mechanism (corona or triboelectric charging), which induces different polarities on different polymers.<\/li>\n\n\n\n<li>Charged flakes pass through an electric field between electrodes or a charged drum.<\/li>\n\n\n\n<li>Based on their charge and conductivity, PET and PVC follow different trajectories and are collected as separate fractions.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Case studies and equipment suppliers report that, when properly integrated, electrostatic separation can reduce PVC contamination from around 1,000 ppm to values below 50 ppm in PET flakes, while also removing other polymer contaminants. This makes the technology particularly attractive as the final refining step before quality control and packaging.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Process conditions that influence electrostatic performance<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">To achieve reliable separation and stay below 50 ppm, several process parameters need to be controlled:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Moisture content:<\/strong> Electrostatic separators generally require dry feed, often with residual moisture below about 0.5\u20130.8%, to prevent charges from dissipating.<\/li>\n\n\n\n<li><strong>Particle size and shape:<\/strong> Flake size should be within a defined range (for example below 10\u201312 mm), with limited fines, to maintain stable trajectories in the electric field.<\/li>\n\n\n\n<li><strong>Blend composition:<\/strong> G\u0131da at\u0131klar\u0131n\u0131n bile\u015fimi nispeten istikrarl\u0131 olmal\u0131d\u0131r veya makine, PVC\/PET oranlar\u0131na g\u00f6re ayarlanmal\u0131d\u0131r ki at\u0131k ve reddedilen fraksiyonlar kontrol alt\u0131nda kalabilsin.<\/li>\n\n\n\n<li><strong>Gerilim, elektrot konfig\u00fcrasyonu ve b\u00f6l\u00fcc\u00fc ayarlar\u0131:<\/strong> Bu parametreleri optimize etmek, PVC kald\u0131rma verimlili\u011fini PET verimi ile dengelemek ve kay\u0131plar\u0131 minimize etmek i\u00e7in kritik \u00f6neme sahiptir.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Pratikte, bir\u00e7ok tesis iki a\u015famal\u0131 bir strateji uygulamaktad\u0131r: birincil manyetik ge\u00e7i\u015f, y\u00fcksek PET \u00fcr\u00fcn\u00fc ve y\u00fcksek PVC reddi ay\u0131rmak i\u00e7in, ard\u0131ndan ikinci ge\u00e7i\u015f, PVC'yi daha da azaltmak ve PET'i geri kazanmak i\u00e7in orta kalite malzemeye uygulan\u0131r.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Entegre PET \u015fi\u015fe y\u0131kama hatlar\u0131n\u0131n rol\u00fc<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Tam kapsaml\u0131 sistem tedarik\u00e7ileri, iyi tasarlanm\u0131\u015f bir PET \u015fi\u015fe y\u0131kama hat\u0131n\u0131 ve son elektrik statik cilalama a\u015famas\u0131n\u0131 birle\u015ftirerek 99.8%'nin \u00fczerinde flake safiyetleri ve \u00e7ok d\u00fc\u015f\u00fck PVC seviyeleri elde edebilece\u011fini g\u00f6stermektedir. Tipik tasar\u0131m unsurlar\u0131 \u015funlar\u0131 i\u00e7erir:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Bale a\u00e7ma, metal \u00e7\u0131karma ve \u00f6n s\u0131n\u0131fland\u0131rma.<\/li>\n\n\n\n<li>Otomatik \u015fi\u015fe s\u0131n\u0131fland\u0131rma (NIR) ve manuel kalite kontrol\u00fc.<\/li>\n\n\n\n<li>Y\u00fcksek verimli etiket kald\u0131rma, s\u0131cak y\u0131kama ve s\u00fcrt\u00fcnme temizleme.<\/li>\n\n\n\n<li>Poliolefinler i\u00e7in \u00e7ok a\u015famal\u0131 y\u00fczen-kal\u0131r ve yo\u011funluk ay\u0131rma.<\/li>\n\n\n\n<li>Elektrostatik ay\u0131rma i\u00e7in gerekli nem seviyesine ula\u015fmak i\u00e7in d\u00fc\u015f\u00fck kal\u0131nt\u0131l\u0131 kurutma.<\/li>\n\n\n\n<li>PET\/PVC ve di\u011fer kar\u0131\u015f\u0131k plastikler i\u00e7in bir veya daha fazla elektrik statik ay\u0131r\u0131c\u0131.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Bu a\u015famalar do\u011fru \u015fekilde m\u00fchendislenip ayarland\u0131\u011f\u0131nda, temiz PET flakelerinin istikrarl\u0131 bir \u00e7\u0131k\u0131\u015f\u0131 elde edilir, PVC 50 ppm e\u015fi\u011finin alt\u0131ndad\u0131r ve g\u0131da s\u0131n\u0131f\u0131 veya y\u00fcksek performans uygulamalar\u0131 i\u00e7in haz\u0131r hale gelir.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Takip, test ve s\u00fcrekli iyile\u015ftirme<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Bir PVC hedefine bir kez ula\u015fmak yeterli de\u011fildir - geri d\u00f6n\u00fc\u015f\u00fcm\u00e7ilerin zaman i\u00e7inde tutarl\u0131 performans g\u00f6stermeleri gerekmektedir. Bu genellikle \u015funlar\u0131 i\u00e7erir:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>PVC i\u00e7eri\u011finin d\u00fczenli olarak laboratuvar test edilmesi, genellikle f\u0131r\u0131n testleri veya \u00f6zel analitik y\u00f6ntemler kullan\u0131larak tan\u0131mlanm\u0131\u015f ppm s\u0131n\u0131rlar\u0131na kar\u015f\u0131, d\u00fczenli olarak.<\/li>\n\n\n\n<li>Anahtar de\u011fi\u015fkenler \u00fczerinde s\u00fcre\u00e7 izleme, bale kalitesi, s\u0131n\u0131fland\u0131rma reddi oranlar\u0131, y\u0131kama performans\u0131 ve elektrik statik ay\u0131r\u0131c\u0131 ayarlar\u0131 gibi.<\/li>\n\n\n\n<li>Hat \u00fczerinde d\u00fczenli olarak denetimler, yeni kontaminasyon kaynaklar\u0131 veya performansta kayma tespit etmek i\u00e7in.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Bu s\u00fcreci kalite y\u00f6netim sistemine d\u00f6n\u00fc\u015ft\u00fcren tesisler, marka sahiplerinin gereksinimlerini kar\u015f\u0131lamak ve y\u00fcksek de\u011ferli rPET i\u00e7in uzun vadeli s\u00f6zle\u015fmeler kazanmak i\u00e7in daha iyi konumdad\u0131r.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Kabul ve QA: 50 ppm'nin alt\u0131nda tutulmas\u0131n\u0131 nas\u0131l kan\u0131tlayabilirsiniz<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Al\u0131c\u0131lar i\u00e7in \u201cPVC &lt; 50 ppm\u201d savunabilir hale getirmek i\u00e7in, kabul plan\u0131n\u0131z\u0131 tan\u0131mlay\u0131n ve ona sad\u0131k kal\u0131n:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u00d6rnekleme plan\u0131:<\/strong> \u00f6rne\u011fin, kurutma sonras\u0131 veya cilalama sonras\u0131 veya paketlenmeden \u00f6nce nerede ve ne s\u0131kl\u0131kla \u00f6rnek al\u0131naca\u011f\u0131n\u0131 belirlemek.<\/li>\n\n\n\n<li><strong>Trend, kesitler de\u011fil:<\/strong> zaman i\u00e7inde sonu\u00e7lar\u0131 izleyin ve sapmalar\u0131 giri\u015fimli balelere, ceket t\u00fcrlerine, nem kaymas\u0131na veya ay\u0131r\u0131c\u0131 ayarlara ba\u011flay\u0131n.<\/li>\n\n\n\n<li><strong>\u0130zlenecek s\u00fcre\u00e7 KPI'lar\u0131:<\/strong> giri\u015fimli bale kalitesi, optik s\u0131n\u0131fland\u0131rma reddi oranlar\u0131, kurutucu nemi, flake boy da\u011f\u0131l\u0131m\u0131 (in\u00e7), elektrik statik voltaj\/b\u00f6l\u00fcc\u00fc ayarlar\u0131 ve PET verim kay\u0131plar\u0131.<\/li>\n\n\n\n<li><strong>T\u0131rmanma kurallar\u0131:<\/strong> bir art\u0131\u015f g\u00f6rd\u00fc\u011f\u00fcn\u00fczde ne olur (lotu tut, orta kaliteyi yeniden i\u015fle, ayarlar\u0131 ayarla, bale kayna\u011f\u0131n\u0131 denetle).<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">B\u00fct\u00fcn bunlar\u0131 bir araya getirme<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Controlling PVC in PET bottle recycling lines below 50 ppm is achievable, but it requires a system-level view:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Keep as much PVC out of the line as possible through bale control and front-end sorting.<\/li>\n\n\n\n<li>Use robust washing and density separation to remove bulk contaminants.<\/li>\n\n\n\n<li>Add dry electrostatic separation as a final polishing step to capture the last PVC and foreign polymers.<\/li>\n\n\n\n<li>Back everything up with testing and process control to prove that you consistently meet the specification.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">By combining these strategies, PET recyclers can produce higher-quality flakes, access more demanding end markets and improve the overall economics of their operations.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">SSS<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>What PVC level is typically required for bottle-to-bottle or food-contact rPET?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Many high-spec buyers treat <strong>\u2264 50 ppm<\/strong> as a key limit, and some push tighter depending on application and risk tolerance.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Can a strong washing line alone guarantee PVC &lt; 50 ppm?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Usually not. Washing removes dirt\/glue\/organics effectively, but PVC control typically needs <strong>polymer-selective separation<\/strong>, especially for small fragments.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>What is the most common reason electrostatic separation underperforms?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Feed conditions: <strong>moisture too high<\/strong>, too many fines, or unstable feed composition\/settings.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Where should PVC testing be done?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">At minimum, test near the final product point (before packaging) and use intermediate checks (e.g., after drying \/ after polishing) to diagnose where excursions originate.<\/p>","protected":false},"excerpt":{"rendered":"<p>Controlling PVC contamination is one of the toughest challenges in PET bottle recycling, especially when you target high-end applications and food-grade rPET. Even at concentrations around 50 ppm, PVC can damage PET quality, causing brittleness, yellowing and unwanted by-products during extrusion. For PET recyclers, keeping PVC as low as possible is not just a technical &hellip; <a href=\"https:\/\/www.recyclemachine.net\/tr\/pvcyi-pet-botta-geri-donusum-hatlarinda-50-ppm-altinda-nasil-kontrol-edebilirsiniz\/\" class=\"more-link\">okumaya devam et <span class=\"screen-reader-text\">PET Bottlesinde PVC'yi 50 ppm Alt\u0131nda Kontrol Etme Yollar\u0131<\/span><\/a><\/p>","protected":false},"author":1,"featured_media":13921,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1997],"tags":[],"class_list":["post-13919","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-buying-guides"],"tsf_seo":{"title":"","description":"","robots":"index, follow","canonical":"","og_title":"","og_description":"","og_image":"","no_blogname":false},"_links":{"self":[{"href":"https:\/\/www.recyclemachine.net\/tr\/wp-json\/wp\/v2\/posts\/13919","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.recyclemachine.net\/tr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.recyclemachine.net\/tr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.recyclemachine.net\/tr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.recyclemachine.net\/tr\/wp-json\/wp\/v2\/comments?post=13919"}],"version-history":[{"count":3,"href":"https:\/\/www.recyclemachine.net\/tr\/wp-json\/wp\/v2\/posts\/13919\/revisions"}],"predecessor-version":[{"id":14309,"href":"https:\/\/www.recyclemachine.net\/tr\/wp-json\/wp\/v2\/posts\/13919\/revisions\/14309"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.recyclemachine.net\/tr\/wp-json\/wp\/v2\/media\/13921"}],"wp:attachment":[{"href":"https:\/\/www.recyclemachine.net\/tr\/wp-json\/wp\/v2\/media?parent=13919"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.recyclemachine.net\/tr\/wp-json\/wp\/v2\/categories?post=13919"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.recyclemachine.net\/tr\/wp-json\/wp\/v2\/tags?post=13919"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}