{"id":3539,"date":"2026-09-05T03:12:24","date_gmt":"2026-09-05T03:12:24","guid":{"rendered":"https:\/\/sivite-machinery.com\/?p=3539"},"modified":"2026-09-07T01:07:05","modified_gmt":"2026-09-07T01:07:05","slug":"evcil-hayvan-yatagi-ekstruzyon-vidasi","status":"publish","type":"post","link":"https:\/\/sivite-machinery.com\/tr\/pet-sheet-extrusion-screw\/","title":{"rendered":"PET Levha Ekstr\u00fczyon Vidas\u0131: L\/D Oran\u0131n\u0131n Nas\u0131l Se\u00e7ilece\u011fi"},"content":{"rendered":"
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Bir\u00e7ok al\u0131c\u0131n\u0131n ilk kez g\u00f6z att\u0131\u011f\u0131 \u015fey PET levha ekstr\u00fczyonu<\/strong><\/a> Ekipmanlara bakt\u0131klar\u0131nda, farkl\u0131 \u00fcreticilerin PET levha ekstr\u00fcderlerinin d\u0131\u015ftan olduk\u00e7a benzer g\u00f6r\u00fcnd\u00fc\u011f\u00fcn\u00fc fark ederler \u2014 silindir, kal\u0131p ve so\u011futma silindiri d\u00fczeni hemen hemen ayn\u0131 g\u00f6r\u00fcn\u00fcr. Ancak i\u00e7 k\u0131s\u0131mdaki temel bile\u015fen olan PET levha ekstr\u00fczyon vidas\u0131na bakt\u0131\u011f\u0131n\u0131zda, hepsi \u2019PET levha\u201c olmas\u0131na ra\u011fmen, saf PET, RPET, CPET ve PETG mobilya kal\u0131plama levhalar\u0131 i\u00e7in vida L\/D oran\u0131 tasar\u0131m\u0131n\u0131n tamamen farkl\u0131 oldu\u011funu g\u00f6receksiniz. Bu, \u00fcreticilerin keyfi bir tasar\u0131m tercihi de\u011fildir; bunun nedeni, her malzemenin farkl\u0131 fiziksel \u00f6zelliklere sahip olmas\u0131 ve ekstr\u00fcderin, bitmi\u015f levhada kristal noktalar\u0131n, yetersiz tokluk, sararma ve mat y\u00fczeylerin olu\u015fmas\u0131n\u0131 \u00f6nlemek i\u00e7in eriyik ekstr\u00fczyonu s\u0131ras\u0131nda s\u0131cakl\u0131k profilini ve malzemenin kalma s\u00fcresini hassas bir \u015fekilde kontrol etmesi gerekti\u011fidir.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Vida L\/D Oran\u0131 Nedir ve Ekstr\u00fczyon Kalitesini Neden Belirler?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Vida L\/D oran\u0131, bir vidan\u0131n etkin \u00e7al\u0131\u015fma uzunlu\u011fu ile \u00e7ap\u0131 aras\u0131ndaki oran\u0131 ifade eder \u2014 \u00f6rne\u011fin, 90 mm \u00e7ap\u0131nda ve 3600 mm etkin uzunlu\u011fa sahip bir vidan\u0131n L\/D oran\u0131 40:1\u2019dir. Bu say\u0131 basit bir geometrik parametre gibi g\u00f6r\u00fcnebilir, ancak malzemenin vida i\u00e7inde ne kadar s\u00fcreyle \u0131s\u0131t\u0131laca\u011f\u0131n\u0131, kesilece\u011fini ve kar\u0131\u015ft\u0131r\u0131laca\u011f\u0131n\u0131 ve vidan\u0131n ka\u00e7 ba\u011f\u0131ms\u0131z s\u0131cakl\u0131k kontrol b\u00f6lgesine b\u00f6l\u00fcnebilece\u011fini do\u011frudan belirler \u2014 buna genellikle kalma s\u00fcresi ve segmentli s\u0131cakl\u0131k kontrol hassasiyeti diyoruz.
Daha y\u00fcksek bir L\/D oran\u0131, genellikle vidan\u0131n daha fazla \u0131s\u0131tma ve plastikle\u015ftirme b\u00f6lgesine b\u00f6l\u00fcnmesini sa\u011flar; b\u00f6ylece her bir b\u00f6lgedeki kesme yo\u011funlu\u011fu ve s\u0131cakl\u0131k art\u0131\u015f\u0131 daha yumu\u015fak ve daha kontrol edilebilir hale gelir. Daha k\u00fc\u00e7\u00fck bir L\/D oran\u0131, plastikle\u015ftirmeyi daha az say\u0131da b\u00f6lgeye yo\u011funla\u015ft\u0131rarak daha y\u00fcksek verimlilik sa\u011flar; ancak malzemenin plastikle\u015ftirilmesi do\u011fas\u0131 gere\u011fi daha zorsa veya daha fazla kirlenme i\u00e7eriyorsa, bu durum plastikle\u015ftirmenin eksik kalmas\u0131na veya b\u00f6lgesel a\u015f\u0131r\u0131 kesmeye yol a\u00e7abilir. \u0130\u015fte tam da bu nedenle, vida tasar\u0131mlar\u0131 aras\u0131nda belirgin farkl\u0131l\u0131klar g\u00f6r\u00fcl\u00fcr. PET levha ekstr\u00fcderleri<\/strong><\/a> Farkl\u0131 malzemelerin i\u015flenmesi \u2014 temel ama\u00e7, her malzemenin fiziksel \u00f6zelliklerine en uygun L\/D oran\u0131n\u0131 ve b\u00f6l\u00fcmlere ayr\u0131lm\u0131\u015f s\u0131cakl\u0131k kontrol \u015femas\u0131n\u0131 kullanarak, ayn\u0131 zamanda plastikle\u015fme kalitesini ve termal kararl\u0131l\u0131\u011f\u0131 kontrol etmektir.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Yetersiz Kontroll\u00fc Bekleme S\u00fcresi Nedeniyle Hangi Sac Kusurlar\u0131 Ortaya \u00c7\u0131kar?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Eksik Plastikle\u015fme: Kristalize Noktalar<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Vida L\/D oran\u0131, malzemenin plastikle\u015fme zorlu\u011funa uymazsa veya b\u00f6l\u00fcmlere ayr\u0131lm\u0131\u015f s\u0131cakl\u0131k kontrol tasar\u0131m\u0131 yetersiz kal\u0131rsa, PET peletlerinde i\u015fleme s\u0131ras\u0131nda tam olarak erimemi\u015f yerel b\u00f6lgeler olu\u015fabilir. Bu erimemi\u015f par\u00e7ac\u0131klar, levha so\u011fudu\u011funda g\u00f6zle g\u00f6r\u00fcl\u00fcr kristal lekeler olu\u015fturur; bu sadece bir g\u00f6r\u00fcn\u00fcm sorunu olmakla kalmaz, ayn\u0131 zamanda levhan\u0131n genel mekanik mukavemetini azaltan bir gerilme yo\u011funla\u015fma noktas\u0131d\u0131r.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Kontrols\u00fcz Is\u0131l \u0130\u015flem Ge\u00e7mi\u015fi: Sararma, Dayan\u0131kl\u0131l\u0131k Kayb\u0131, Mat Y\u00fczey<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Buna kar\u015f\u0131l\u0131k, b\u00f6lgelere ayr\u0131lm\u0131\u015f s\u0131cakl\u0131k kontrol\u00fc ve kesme yo\u011funlu\u011fu, malzemenin termal duyarl\u0131l\u0131\u011f\u0131na hassas bir \u015fekilde ayarlanmazsa ve malzeme, yerel bir y\u00fcksek s\u0131cakl\u0131k b\u00f6lgesinde \u00e7ok uzun s\u00fcre kal\u0131rsa veya a\u015f\u0131r\u0131 kesime maruz kal\u0131rsa, PET termal bozulmaya u\u011frar \u2014 bu durum sararma, molek\u00fcler zincir kopmas\u0131 nedeniyle dayan\u0131kl\u0131l\u0131kta azalma ve g\u00f6zle g\u00f6r\u00fcl\u00fcr derecede matla\u015fan bir y\u00fczey olarak ortaya \u00e7\u0131kar. PET, termal ge\u00e7mi\u015fe kar\u015f\u0131 olduk\u00e7a hassas bir polyester malzemedir ve yakla\u015f\u0131k 270\u00b0C'nin \u00fczerindeki yerel kalma s\u00fcrelerinde bozulma \u00f6nemli \u00f6l\u00e7\u00fcde h\u0131zlan\u0131r.
\u00c7\u00fcnk\u00fc bu iki kusur t\u00fcr\u00fc, birbirine z\u0131t sorunlara kar\u015f\u0131l\u0131k gelir \u2014 \u201cyetersiz plastikle\u015fme\u201d ile \u201ckontrol d\u0131\u015f\u0131 kalan yerel \u0131s\u0131l ge\u00e7mi\u015f\u201d \u2014 vida L\/D oran\u0131 ve b\u00f6lge tasar\u0131m\u0131, karar\u0131 \u201cdaha uzun her zaman daha g\u00fcvenlidir\u201d veya \u201cdaha k\u0131sa her zaman daha g\u00fcvenlidir\u201d gibi tek bir boyuta indirgemek yerine, her bir malzemenin erime davran\u0131\u015f\u0131na tam olarak uyarlanmal\u0131d\u0131r.\u201d<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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SIVITE\u2019nin Vida L\/D Oran\u0131 Parametreleri: On Y\u0131l\u0131 A\u015fan Test Deneyimine Dayal\u0131<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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PET levha ekstr\u00fczyon vidas\u0131 tasar\u0131m\u0131nda uzmanla\u015fm\u0131\u015f bir \u00fcretici olarak, SIVITE levha ekstr\u00fcder \u00fcreticisi, son on y\u0131l\u0131 a\u015fk\u0131n bir s\u00fcredir saf PET\/APET, RPET, CPET ve PETG malzemeleri \u00fczerinde kapsaml\u0131 ger\u00e7ek ortam testleri ger\u00e7ekle\u015ftirmi\u015f ve en istikrarl\u0131 levha kalitesini sa\u011flayan bir dizi L\/D oran\u0131 parametresine kademeli olarak ula\u015fm\u0131\u015ft\u0131r. Bu rakamlar teorik hesaplamalar de\u011fildir; ger\u00e7ek \u00fcretim verileriyle defalarca do\u011frulanmas\u0131n\u0131n sonucudur:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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1. \u0130\u015flenmemi\u015f PET\/APET: L\/D oran\u0131 40:1<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\u0130\u015flenmemi\u015f PET veya APET peletleri, homojen fiziksel \u00f6zelliklere ve d\u00fc\u015f\u00fck nem ve kirlilik seviyelerine sahiptir. SIVITE, 40:1\u2019lik bir L\/D oran\u0131 kullan\u0131r; daha fazla say\u0131da b\u00f6l\u00fcmlere ayr\u0131lm\u0131\u015f s\u0131cakl\u0131k kontrol b\u00f6lgeleri sayesinde daha nazik ve daha kapsaml\u0131 bir plastikle\u015ftirme s\u00fcreci sa\u011flan\u0131r \u2014 bu sayede levhan\u0131n \u015feffafl\u0131\u011f\u0131 ve parlakl\u0131\u011f\u0131 korunurken istikrarl\u0131 bir \u00fcretim elde edilir.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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2. RPET: L\/D oran\u0131 48:1 (gaz giderme b\u00f6lgesi ile)<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Geri d\u00f6n\u00fc\u015ft\u00fcr\u00fclm\u00fc\u015f PET (RPET), daha y\u00fcksek nem, kirlilik ve IV dalgalanmas\u0131 i\u00e7erir; bu da plastikle\u015ftirme i\u015flemini belirgin \u015fekilde zorla\u015ft\u0131r\u0131r \u2014 ayr\u0131ca ekstr\u00fczyon s\u0131ras\u0131nda nemin ve d\u00fc\u015f\u00fck molek\u00fcler a\u011f\u0131rl\u0131kl\u0131 u\u00e7ucu maddelerin giderilmesini gerektirir. SIVITE, RPET i\u00e7in 48:1'lik bir L\/D oran\u0131 kullan\u0131r ve entegre \u00f6zel bir vakumlu gaz giderme b\u00f6lgesi sayesinde, levhada kabarc\u0131k ve bulan\u0131kl\u0131k kusurlar\u0131n\u0131 \u00f6nlemek i\u00e7in u\u00e7ucu maddeleri s\u00fcrekli olarak tahliye ederken kapsaml\u0131 bir plastikle\u015ftirme sa\u011flar.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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3. CPET: Uzunluk\/\u00c7ap oran\u0131 34:1<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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CPET (kristalle\u015ftirilmi\u015f PET), esas olarak \u0131s\u0131ya dayan\u0131kl\u0131 g\u0131da tepsileri ve f\u0131r\u0131nda kullan\u0131labilen kaplar i\u00e7in kullan\u0131l\u0131r. Bu malzemenin ay\u0131rt edici \u00f6zelli\u011fi, bitmi\u015f levhan\u0131n mikrodalga veya f\u0131r\u0131n \u0131s\u0131s\u0131na dayanabilmesi i\u00e7in kontroll\u00fc bir kristallik derecesine sahip olmas\u0131 gereklili\u011fidir. SIVITE, CPET i\u00e7in 34:1'lik bir L\/D oran\u0131 kullan\u0131r ve bunu daha hassas segmentli s\u0131cakl\u0131k kontrol\u00fcyle birle\u015ftirir; b\u00f6ylece eriyik, ard\u0131ndan gelen kontroll\u00fc kristalle\u015fme a\u015famas\u0131na uygun bir termal durumda vidadan \u00e7\u0131kar ve istikrarl\u0131 kristalle\u015fme i\u00e7in a\u015f\u0131r\u0131 ya da yetersiz olan termal ge\u00e7mi\u015flerden ka\u00e7\u0131n\u0131l\u0131r.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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4. PETG: L\/D oran\u0131 32:1<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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PETG (glikol ile modifiye edilmi\u015f PET), molek\u00fcler yap\u0131s\u0131nda bir kopolimer birimi bar\u0131nd\u0131r\u0131r; bu da ona nispeten daha d\u00fc\u015f\u00fck termal kararl\u0131l\u0131k kazand\u0131r\u0131r ve genellikle standart PET\u2019ten 20-30 \u00b0C daha d\u00fc\u015f\u00fck s\u0131cakl\u0131klarda i\u015flenir \u2014 \u00e7ok uzun s\u00fcre \u00e7al\u0131\u015ft\u0131r\u0131lmas\u0131 kolayca termal bozunmaya yol a\u00e7ar. SIVITE, PETG i\u00e7in 32:1'lik bir L\/D oran\u0131 kullan\u0131r; bu sayede nispeten daha k\u0131sa plastikle\u015ftirme mesafesini daha d\u00fc\u015f\u00fck i\u015fleme s\u0131cakl\u0131klar\u0131yla birle\u015ftirerek, y\u00fcksek s\u0131cakl\u0131k b\u00f6lgelerindeki kalma s\u00fcresini daha s\u0131k\u0131 bir \u015fekilde kontrol eder. Bu parametre, PETG mobilya kal\u0131p levhalar\u0131na ili\u015fkin kapsaml\u0131 ger\u00e7ek \u00fcretim verileriyle do\u011frulanm\u0131\u015f ve sabitlenmi\u015ftir; b\u00f6ylece termal bozulma riski g\u00fcvenilir bir \u015fekilde azalt\u0131l\u0131rken, tam plastikle\u015fme yine de sa\u011flanmaktad\u0131r.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Yukar\u0131daki rakamlar, on y\u0131l\u0131 a\u015fk\u0131n bir s\u00fcredir toplanan ger\u00e7ek test verilerinden derlenen ve SIVITE taraf\u0131ndan \u00f6nerilen parametrelerdir. Ger\u00e7ek L\/D oran\u0131, ilgili ekipman\u0131n \u00fcretim kapasitesi, hammaddenin IV de\u011feri ve sonraki \u015fekillendirme a\u015famalar\u0131ndaki gereksinimlere g\u00f6re daha da hassas bir \u015fekilde ayarlanmal\u0131d\u0131r.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Sat\u0131n Alma Rehberi: Vida L\/D Oran\u0131n\u0131 Kesinle\u015ftirmeden \u00d6nce Sorulmas\u0131 Gereken Sorular<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\u25cf Ba\u015fl\u0131ca hammaddeniz nedir? \u0130\u015flenmemi\u015f, geri d\u00f6n\u00fc\u015ft\u00fcr\u00fclm\u00fc\u015f m\u00fc, yoksa bir kar\u0131\u015f\u0131m m\u0131 \u2014 ve hangi oranda \u2014 zira bu, plastikle\u015ftirme zorlu\u011funu ve gaz giderme gereksinimlerini belirler
\u25cf CPET veya PETG gibi \u00f6zel malzemeler \u00fcretme plan\u0131n\u0131z var m\u0131? Gelecekte ayn\u0131 \u00fcretim hatt\u0131nda birden fazla malzemenin i\u015flenmesi gerekecekse, vidan\u0131n mod\u00fcler olarak ayarlan\u0131p ayarlanamayaca\u011f\u0131n\u0131 veya birden fazla vida setine ihtiya\u00e7 duyulup duyulmayaca\u011f\u0131n\u0131 \u00f6nceden \u00fcreticiye teyit edin
\u25cf Levhalar\u0131n g\u00f6r\u00fcn\u00fcm\u00fc ve mekanik \u00f6zelliklerine ili\u015fkin gereksinimleriniz ne kadar kat\u0131d\u0131r? \u015eeffafl\u0131k, parlakl\u0131k ve dayan\u0131kl\u0131l\u0131k konusundaki gereksinimler ne kadar y\u00fcksekse, L\/D oran\u0131 ve segmentli s\u0131cakl\u0131k kontrol\u00fcn\u00fcn o kadar hassas bir \u015fekilde uyumlu hale getirilmesi gerekir<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"

The first time many buyers look at PET sheet extrusion equipment, they notice that different manufacturers’ PET sheet extruders look […]<\/p>\n","protected":false},"author":5,"featured_media":3540,"comment_status":"closed","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":"default","ast-page-background-enabled":"default","ast-page-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":"","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-4)","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-4)","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-4)","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":""}},"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[37],"tags":[],"class_list":["post-3539","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge"],"yoast_head":"\nPET Sheet Extrusion Screw: How to Choose the L\/D Ratio<\/title>\n<meta name=\"description\" content=\"How should you choose a PET sheet extrusion screw L\/D ratio for virgin PET, RPET, CPET, and PETG? 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