{"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":"tornillo-de-extrusion-para-laminas-de-pet","status":"publish","type":"post","link":"https:\/\/sivite-machinery.com\/es\/pet-sheet-extrusion-screw\/","title":{"rendered":"Tornillo de extrusi\u00f3n para l\u00e1minas de PET: c\u00f3mo elegir la relaci\u00f3n L\/D"},"content":{"rendered":"
\n\t\t\t\t
\n\t\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

La primera vez que muchos compradores echan un vistazo a Extrusi\u00f3n de l\u00e1minas de PET<\/strong><\/a> equipos, se dan cuenta de que las extrusoras de l\u00e1minas de PET de distintos fabricantes tienen un aspecto bastante similar por fuera: la disposici\u00f3n del cilindro, la matriz y los rodillos de enfriamiento parece pr\u00e1cticamente la misma. Pero, al observar el componente principal, el tornillo de extrusi\u00f3n de l\u00e1minas de PET, se comprueba que, aunque se trate en todos los casos de \u2019l\u00e1minas de PET\u201c, el dise\u00f1o de la relaci\u00f3n L\/D del tornillo es completamente diferente para el PET virgen, el RPET, el CPET y las l\u00e1minas de PETG moldeadas para muebles. No se trata de una elecci\u00f3n de dise\u00f1o arbitraria por parte de los fabricantes, sino que se debe a que cada material tiene propiedades f\u00edsicas diferentes, y la extrusora debe controlar con precisi\u00f3n el perfil de temperatura y el tiempo de residencia del material durante la extrusi\u00f3n en estado fundido para evitar la aparici\u00f3n de puntos cristalinos, una baja tenacidad, el amarilleamiento y superficies mates en la l\u00e1mina acabada.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

\n\t\t\t\t
\n\t\t\t\t\t

\u00bfQu\u00e9 es la relaci\u00f3n L\/D del tornillo y por qu\u00e9 determina la calidad de la extrusi\u00f3n?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

La relaci\u00f3n L\/D de un tornillo se refiere a la relaci\u00f3n entre la longitud efectiva de trabajo del tornillo y su di\u00e1metro; por ejemplo, un tornillo con un di\u00e1metro de 90 mm y una longitud efectiva de 3600 mm tiene una relaci\u00f3n L\/D de 40:1. Esta cifra puede parecer un simple par\u00e1metro geom\u00e9trico, pero determina directamente el tiempo que el material pasa siendo calentado, cizallado y mezclado en el interior del tornillo, as\u00ed como el n\u00famero de zonas independientes de control de temperatura en las que se puede dividir el tornillo \u2014lo que com\u00fanmente denominamos \u00abtiempo de residencia\u00bb y \u00abprecisi\u00f3n del control de temperatura segmentado\u00bb.
Por lo general, una relaci\u00f3n L\/D mayor permite dividir el tornillo en m\u00e1s zonas de calentamiento y plastificaci\u00f3n, lo que hace que la intensidad de cizallamiento y el aumento de temperatura en cada zona sean m\u00e1s suaves y controlables. Una relaci\u00f3n L\/D menor concentra la plastificaci\u00f3n en menos zonas, lo que ofrece una mayor eficiencia; sin embargo, si el material es intr\u00ednsecamente m\u00e1s dif\u00edcil de plastificar o presenta un mayor nivel de contaminaci\u00f3n, esto puede dar lugar a una plastificaci\u00f3n incompleta o a un cizallamiento excesivo localizado. Esta es precisamente la raz\u00f3n por la que los dise\u00f1os de los tornillos difieren notablemente entre Extrusoras de l\u00e1minas de PET<\/strong><\/a> En el procesamiento de diferentes materiales, el objetivo principal es utilizar la relaci\u00f3n L\/D y el sistema de control de temperatura segmentado que mejor se adapte a las propiedades f\u00edsicas de cada material, controlando al mismo tiempo la calidad de la plastificaci\u00f3n y la estabilidad t\u00e9rmica.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

\n\t\t\t\t
\n\t\t\t\t\t

\u00bfQu\u00e9 defectos en las l\u00e1minas se deben a un tiempo de permanencia mal controlado?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t

Plastificaci\u00f3n incompleta: manchas cristalinas<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

Si la relaci\u00f3n L\/D del tornillo no se adapta a la dificultad de plastificaci\u00f3n del material, o si el dise\u00f1o segmentado del control de temperatura resulta insuficiente, los gr\u00e1nulos de PET pueden presentar zonas localizadas que no se funden por completo durante el procesamiento. Estas part\u00edculas no fundidas forman puntos cristalinos visibles una vez que la l\u00e1mina se enfr\u00eda; esto no solo supone un problema est\u00e9tico, sino que tambi\u00e9n constituye un punto de concentraci\u00f3n de tensiones que reduce la resistencia mec\u00e1nica global de la l\u00e1mina.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

\n\t\t\t\t
\n\t\t\t\t\t

Historial t\u00e9rmico no controlado: amarilleamiento, menor tenacidad, superficie mate<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

Por el contrario, si el control segmentado de la temperatura y la intensidad de cizallamiento no se ajustan con precisi\u00f3n a la sensibilidad t\u00e9rmica de un material, y este permanece demasiado tiempo o sufre un cizallamiento excesivo en una zona localizada de alta temperatura, el PET sufre degradaci\u00f3n t\u00e9rmica, lo que se manifiesta en un amarilleamiento, una menor tenacidad debido a la ruptura de las cadenas moleculares y una superficie notablemente m\u00e1s mate. El PET es un poli\u00e9ster bastante sensible al historial t\u00e9rmico, y su degradaci\u00f3n se acelera significativamente si la exposici\u00f3n localizada supera aproximadamente los 270 \u00b0C.
Dado que estos dos tipos de defectos corresponden a problemas opuestos \u2014 \u201cplastificaci\u00f3n insuficiente\u201d frente a \u201chistorial t\u00e9rmico localizado fuera de control\u201d\u2014, la relaci\u00f3n L\/D del tornillo y el dise\u00f1o de las zonas deben adaptarse con precisi\u00f3n al comportamiento de fusi\u00f3n de cada material espec\u00edfico, en lugar de reducir la decisi\u00f3n a una \u00fanica dimensi\u00f3n como \u201ccuanto m\u00e1s largo, m\u00e1s seguro\u201d o \u201ccuanto m\u00e1s corto, m\u00e1s seguro\u201d.\u201d<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

\n\t\t\t\t
\n\t\t\t\t\t

Par\u00e1metros de la relaci\u00f3n L\/D del tornillo de SIVITE, basados en m\u00e1s de una d\u00e9cada de pruebas<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

Como fabricante especializado en el dise\u00f1o de tornillos para extrusoras de l\u00e1minas de PET, SIVITE, fabricante de extrusoras de l\u00e1minas, lleva m\u00e1s de una d\u00e9cada realizando exhaustivas pruebas en condiciones reales con PET\/APET virgen, RPET, CPET y PETG, lo que le ha permitido establecer gradualmente un conjunto de par\u00e1metros de relaci\u00f3n L\/D que garantizan la calidad m\u00e1s estable de las l\u00e1minas. Estas cifras no son c\u00e1lculos te\u00f3ricos, sino el resultado de una validaci\u00f3n repetida contrastada con datos reales de producci\u00f3n:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"Tabla\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t

1. PET virgen\/APET: L\/D 40:1<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

Los gr\u00e1nulos de PET virgen o APET presentan propiedades f\u00edsicas uniformes y bajos niveles de humedad y contaminaci\u00f3n. SIVITE utiliza una relaci\u00f3n L\/D de 40:1, con un mayor n\u00famero de zonas de control de temperatura segmentadas que permiten un proceso de plastificaci\u00f3n m\u00e1s suave y completo, lo que mantiene la transparencia y el brillo de la l\u00e1mina al tiempo que garantiza una producci\u00f3n estable.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

\n\t\t\t\t
\n\t\t\t\t\t

2. RPET: L\/D 48:1 (con zona de desgasificaci\u00f3n)<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

El PET reciclado (RPET) presenta mayores niveles de humedad, contaminaci\u00f3n y fluctuaciones en el \u00edndice de viscosidad (IV), lo que dificulta notablemente la plastificaci\u00f3n; adem\u00e1s, requiere la eliminaci\u00f3n de la humedad y de los compuestos vol\u00e1tiles de bajo peso molecular durante la extrusi\u00f3n. SIVITE utiliza una relaci\u00f3n L\/D de 48:1 para el RPET, con una zona de desgasificaci\u00f3n al vac\u00edo integrada, lo que garantiza una plastificaci\u00f3n completa al tiempo que se eliminan continuamente los compuestos vol\u00e1tiles para evitar la formaci\u00f3n de burbujas y defectos de opacidad en la l\u00e1mina.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

\n\t\t\t\t
\n\t\t\t\t\t

3. CPET: L\/D 34:1<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

El CPET (PET cristalizado) se utiliza principalmente para bandejas alimentarias resistentes al calor y recipientes aptos para el horno. Su requisito distintivo es que la l\u00e1mina acabada debe presentar un grado controlado de cristalinidad para soportar el calentamiento en el microondas o en el horno. SIVITE utiliza una relaci\u00f3n L\/D de 34:1 para el CPET, junto con un control de temperatura segmentado m\u00e1s preciso, de modo que la masa fundida sale del tornillo en un estado t\u00e9rmico adecuado para la etapa de cristalizaci\u00f3n controlada que sigue, evitando as\u00ed un historial t\u00e9rmico excesivo o insuficiente para una cristalizaci\u00f3n estable.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

\n\t\t\t\t
\n\t\t\t\t\t

4. PETG: relaci\u00f3n L\/D de 32:1<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

El PETG (PET modificado con glicol) tiene una unidad de copol\u00edmero integrada en su estructura molecular, lo que le confiere una estabilidad t\u00e9rmica relativamente menor, y normalmente se procesa a temperaturas entre 20 y 30 \u00b0C inferiores a las del PET est\u00e1ndar; si se mantiene en funcionamiento durante demasiado tiempo, se produce f\u00e1cilmente una degradaci\u00f3n t\u00e9rmica. SIVITE utiliza una relaci\u00f3n L\/D de 32:1 para el PETG, combinando un recorrido de plastificaci\u00f3n relativamente m\u00e1s corto con temperaturas de procesamiento m\u00e1s bajas para reducir al m\u00ednimo el tiempo de permanencia en las zonas de alta temperatura. Este par\u00e1metro se valid\u00f3 y se fij\u00f3 a partir de una amplia recopilaci\u00f3n de datos de producci\u00f3n reales sobre l\u00e1minas de PETG para muebles moldeadas, lo que reduce de forma fiable el riesgo de degradaci\u00f3n t\u00e9rmica al tiempo que garantiza una plastificaci\u00f3n completa.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

Las cifras anteriores son los par\u00e1metros recomendados por SIVITE, resumidos a partir de m\u00e1s de una d\u00e9cada de datos de ensayos en condiciones reales. La relaci\u00f3n L\/D real debe ajustarse con mayor precisi\u00f3n en funci\u00f3n del rendimiento espec\u00edfico del equipo, el valor IV de la materia prima y los requisitos de conformado posteriores.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

\n\t\t\t\t
\n\t\t\t\t\t

Gu\u00eda de compra: Preguntas que debes hacerte antes de decidir la relaci\u00f3n L\/D de un tornillo<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

\u25cf \u00bfCu\u00e1l es tu materia prima principal? \u00bfV\u00edrgen, reciclada o una mezcla \u2014y en qu\u00e9 proporci\u00f3n\u2014, ya que esto determina la dificultad de plastificaci\u00f3n y las necesidades de desgasificaci\u00f3n?
\u25cf \u00bfTiene previsto fabricar materiales especiales como el CPET o el PETG? Si en el futuro la misma l\u00ednea tiene que procesar varios materiales, confirme con el fabricante con antelaci\u00f3n si el tornillo se puede ajustar de forma modular o si se necesitar\u00e1n varios juegos de tornillos.
\u25cf \u00bfQu\u00e9 nivel de exigencia tienen sus requisitos en cuanto al aspecto y las propiedades mec\u00e1nicas de las l\u00e1minas? Cuanto m\u00e1s exigentes sean los requisitos de transparencia, brillo y resistencia, mayor precisi\u00f3n se necesitar\u00e1 a la hora de ajustar la relaci\u00f3n L\/D y el control segmentado de la temperatura.<\/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? See SIVITE's data-backed 32:1-48:1 parameters that prevent crystalline spots and yellowing.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/sivite-machinery.com\/es\/tornillo-de-extrusion-para-laminas-de-pet\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"PET Sheet Extrusion Screw: How to Choose the L\/D Ratio\" \/>\n<meta property=\"og:description\" content=\"How should you choose a PET sheet extrusion screw L\/D ratio for virgin PET, RPET, CPET, and PETG? See SIVITE's data-backed 32:1-48:1 parameters that prevent crystalline spots and yellowing.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/sivite-machinery.com\/es\/tornillo-de-extrusion-para-laminas-de-pet\/\" \/>\n<meta property=\"og:site_name\" content=\"Sivite Machinery\" \/>\n<meta property=\"article:published_time\" content=\"2026-09-05T03:12:24+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-09-07T01:07:05+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/sivite-machinery.com\/wp-content\/uploads\/2026\/09\/PET-Sheet-Extrusion-screw.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"675\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"TAN, mingli\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Escrito por\" \/>\n\t<meta name=\"twitter:data1\" content=\"TAN, mingli\" \/>\n\t<meta name=\"twitter:label2\" content=\"Tiempo de lectura\" \/>\n\t<meta name=\"twitter:data2\" content=\"5 minutos\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"TechArticle\",\"@id\":\"https:\\\/\\\/sivite-machinery.com\\\/pet-sheet-extrusion-screw\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/sivite-machinery.com\\\/pet-sheet-extrusion-screw\\\/\"},\"author\":{\"name\":\"TAN, mingli\",\"@id\":\"https:\\\/\\\/sivite-machinery.com\\\/#\\\/schema\\\/person\\\/4866346b02efea9e0ffe5b3c0799de7f\"},\"headline\":\"PET Sheet Extrusion Screw: How to Choose the L\\\/D Ratio\",\"datePublished\":\"2026-09-05T03:12:24+00:00\",\"dateModified\":\"2026-09-07T01:07:05+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/sivite-machinery.com\\\/pet-sheet-extrusion-screw\\\/\"},\"wordCount\":1084,\"publisher\":{\"@id\":\"https:\\\/\\\/sivite-machinery.com\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/sivite-machinery.com\\\/pet-sheet-extrusion-screw\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/sivite-machinery.com\\\/wp-content\\\/uploads\\\/2026\\\/09\\\/PET-Sheet-Extrusion-screw.jpg\",\"articleSection\":[\"Knowledge\"],\"inLanguage\":\"es\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/sivite-machinery.com\\\/pet-sheet-extrusion-screw\\\/\",\"url\":\"https:\\\/\\\/sivite-machinery.com\\\/pet-sheet-extrusion-screw\\\/\",\"name\":\"PET Sheet Extrusion Screw: How to Choose the L\\\/D Ratio\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/sivite-machinery.com\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/sivite-machinery.com\\\/pet-sheet-extrusion-screw\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/sivite-machinery.com\\\/pet-sheet-extrusion-screw\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/sivite-machinery.com\\\/wp-content\\\/uploads\\\/2026\\\/09\\\/PET-Sheet-Extrusion-screw.jpg\",\"datePublished\":\"2026-09-05T03:12:24+00:00\",\"dateModified\":\"2026-09-07T01:07:05+00:00\",\"description\":\"How should you choose a PET sheet extrusion screw L\\\/D ratio for virgin PET, RPET, CPET, and PETG? See SIVITE's data-backed 32:1-48:1 parameters that prevent crystalline spots and yellowing.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/sivite-machinery.com\\\/pet-sheet-extrusion-screw\\\/#breadcrumb\"},\"inLanguage\":\"es\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/sivite-machinery.com\\\/pet-sheet-extrusion-screw\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"es\",\"@id\":\"https:\\\/\\\/sivite-machinery.com\\\/pet-sheet-extrusion-screw\\\/#primaryimage\",\"url\":\"https:\\\/\\\/sivite-machinery.com\\\/wp-content\\\/uploads\\\/2026\\\/09\\\/PET-Sheet-Extrusion-screw.jpg\",\"contentUrl\":\"https:\\\/\\\/sivite-machinery.com\\\/wp-content\\\/uploads\\\/2026\\\/09\\\/PET-Sheet-Extrusion-screw.jpg\",\"width\":1200,\"height\":675,\"caption\":\"PET Sheet Extrusion screw\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/sivite-machinery.com\\\/pet-sheet-extrusion-screw\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u9996\u9875\",\"item\":\"https:\\\/\\\/sivite-machinery.com\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"PET Sheet Extrusion Screw: How to Choose the L\\\/D Ratio\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/sivite-machinery.com\\\/#website\",\"url\":\"https:\\\/\\\/sivite-machinery.com\\\/\",\"name\":\"Sivite Machinery\",\"description\":\"China's Top 3 Manufacturer of PP PET Sheet Extrusion & Thermoforming Machines\",\"publisher\":{\"@id\":\"https:\\\/\\\/sivite-machinery.com\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/sivite-machinery.com\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"es\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/sivite-machinery.com\\\/#organization\",\"name\":\"Sivite Machinery\",\"url\":\"https:\\\/\\\/sivite-machinery.com\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"es\",\"@id\":\"https:\\\/\\\/sivite-machinery.com\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/sivite-machinery.com\\\/wp-content\\\/uploads\\\/2025\\\/10\\\/sivite-machinery-logo-1.png\",\"contentUrl\":\"https:\\\/\\\/sivite-machinery.com\\\/wp-content\\\/uploads\\\/2025\\\/10\\\/sivite-machinery-logo-1.png\",\"width\":350,\"height\":100,\"caption\":\"Sivite Machinery\"},\"image\":{\"@id\":\"https:\\\/\\\/sivite-machinery.com\\\/#\\\/schema\\\/logo\\\/image\\\/\"}},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/sivite-machinery.com\\\/#\\\/schema\\\/person\\\/4866346b02efea9e0ffe5b3c0799de7f\",\"name\":\"TAN, mingli\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"es\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/9f372e7cb6037c70f4c749bf9ba39ab5fec276a883b91cb823e368a04de99b0b?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/9f372e7cb6037c70f4c749bf9ba39ab5fec276a883b91cb823e368a04de99b0b?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/9f372e7cb6037c70f4c749bf9ba39ab5fec276a883b91cb823e368a04de99b0b?s=96&d=mm&r=g\",\"caption\":\"TAN, mingli\"},\"sameAs\":[\"https:\\\/\\\/sivite-machinery.com\"],\"url\":\"https:\\\/\\\/sivite-machinery.com\\\/es\\\/author\\\/sivitemachinery\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Tornillo de extrusi\u00f3n para l\u00e1minas de PET: c\u00f3mo elegir la relaci\u00f3n L\/D","description":"\u00bfC\u00f3mo se debe elegir la relaci\u00f3n L\/D del tornillo de extrusi\u00f3n de l\u00e1minas de PET para PET virgen, RPET, CPET y PETG? Consulta los par\u00e1metros de SIVITE, respaldados por datos, que oscilan entre 32:1 y 48:1 y evitan la aparici\u00f3n de manchas cristalinas y el amarilleamiento.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/sivite-machinery.com\/es\/tornillo-de-extrusion-para-laminas-de-pet\/","og_locale":"es_ES","og_type":"article","og_title":"PET Sheet Extrusion Screw: How to Choose the L\/D Ratio","og_description":"How should you choose a PET sheet extrusion screw L\/D ratio for virgin PET, RPET, CPET, and PETG? See SIVITE's data-backed 32:1-48:1 parameters that prevent crystalline spots and yellowing.","og_url":"https:\/\/sivite-machinery.com\/es\/tornillo-de-extrusion-para-laminas-de-pet\/","og_site_name":"Sivite Machinery","article_published_time":"2026-09-05T03:12:24+00:00","article_modified_time":"2026-09-07T01:07:05+00:00","og_image":[{"width":1200,"height":675,"url":"https:\/\/sivite-machinery.com\/wp-content\/uploads\/2026\/09\/PET-Sheet-Extrusion-screw.jpg","type":"image\/jpeg"}],"author":"TAN, mingli","twitter_card":"summary_large_image","twitter_misc":{"Escrito por":"TAN, mingli","Tiempo de lectura":"5 minutos"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"TechArticle","@id":"https:\/\/sivite-machinery.com\/pet-sheet-extrusion-screw\/#article","isPartOf":{"@id":"https:\/\/sivite-machinery.com\/pet-sheet-extrusion-screw\/"},"author":{"name":"TAN, mingli","@id":"https:\/\/sivite-machinery.com\/#\/schema\/person\/4866346b02efea9e0ffe5b3c0799de7f"},"headline":"PET Sheet Extrusion Screw: How to Choose the L\/D Ratio","datePublished":"2026-09-05T03:12:24+00:00","dateModified":"2026-09-07T01:07:05+00:00","mainEntityOfPage":{"@id":"https:\/\/sivite-machinery.com\/pet-sheet-extrusion-screw\/"},"wordCount":1084,"publisher":{"@id":"https:\/\/sivite-machinery.com\/#organization"},"image":{"@id":"https:\/\/sivite-machinery.com\/pet-sheet-extrusion-screw\/#primaryimage"},"thumbnailUrl":"https:\/\/sivite-machinery.com\/wp-content\/uploads\/2026\/09\/PET-Sheet-Extrusion-screw.jpg","articleSection":["Knowledge"],"inLanguage":"es"},{"@type":"WebPage","@id":"https:\/\/sivite-machinery.com\/pet-sheet-extrusion-screw\/","url":"https:\/\/sivite-machinery.com\/pet-sheet-extrusion-screw\/","name":"Tornillo de extrusi\u00f3n para l\u00e1minas de PET: c\u00f3mo elegir la relaci\u00f3n L\/D","isPartOf":{"@id":"https:\/\/sivite-machinery.com\/#website"},"primaryImageOfPage":{"@id":"https:\/\/sivite-machinery.com\/pet-sheet-extrusion-screw\/#primaryimage"},"image":{"@id":"https:\/\/sivite-machinery.com\/pet-sheet-extrusion-screw\/#primaryimage"},"thumbnailUrl":"https:\/\/sivite-machinery.com\/wp-content\/uploads\/2026\/09\/PET-Sheet-Extrusion-screw.jpg","datePublished":"2026-09-05T03:12:24+00:00","dateModified":"2026-09-07T01:07:05+00:00","description":"\u00bfC\u00f3mo se debe elegir la relaci\u00f3n L\/D del tornillo de extrusi\u00f3n de l\u00e1minas de PET para PET virgen, RPET, CPET y PETG? Consulta los par\u00e1metros de SIVITE, respaldados por datos, que oscilan entre 32:1 y 48:1 y evitan la aparici\u00f3n de manchas cristalinas y el amarilleamiento.","breadcrumb":{"@id":"https:\/\/sivite-machinery.com\/pet-sheet-extrusion-screw\/#breadcrumb"},"inLanguage":"es","potentialAction":[{"@type":"ReadAction","target":["https:\/\/sivite-machinery.com\/pet-sheet-extrusion-screw\/"]}]},{"@type":"ImageObject","inLanguage":"es","@id":"https:\/\/sivite-machinery.com\/pet-sheet-extrusion-screw\/#primaryimage","url":"https:\/\/sivite-machinery.com\/wp-content\/uploads\/2026\/09\/PET-Sheet-Extrusion-screw.jpg","contentUrl":"https:\/\/sivite-machinery.com\/wp-content\/uploads\/2026\/09\/PET-Sheet-Extrusion-screw.jpg","width":1200,"height":675,"caption":"PET Sheet Extrusion screw"},{"@type":"BreadcrumbList","@id":"https:\/\/sivite-machinery.com\/pet-sheet-extrusion-screw\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"\u9996\u9875","item":"https:\/\/sivite-machinery.com\/"},{"@type":"ListItem","position":2,"name":"PET Sheet Extrusion Screw: How to Choose the L\/D Ratio"}]},{"@type":"WebSite","@id":"https:\/\/sivite-machinery.com\/#website","url":"https:\/\/sivite-machinery.com\/","name":"Sivite Machinery","description":"Los 3 principales fabricantes chinos de m\u00e1quinas de extrusi\u00f3n y termoformado de l\u00e1minas de PP y PET.","publisher":{"@id":"https:\/\/sivite-machinery.com\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/sivite-machinery.com\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"es"},{"@type":"Organization","@id":"https:\/\/sivite-machinery.com\/#organization","name":"Sivite Machinery","url":"https:\/\/sivite-machinery.com\/","logo":{"@type":"ImageObject","inLanguage":"es","@id":"https:\/\/sivite-machinery.com\/#\/schema\/logo\/image\/","url":"https:\/\/sivite-machinery.com\/wp-content\/uploads\/2025\/10\/sivite-machinery-logo-1.png","contentUrl":"https:\/\/sivite-machinery.com\/wp-content\/uploads\/2025\/10\/sivite-machinery-logo-1.png","width":350,"height":100,"caption":"Sivite Machinery"},"image":{"@id":"https:\/\/sivite-machinery.com\/#\/schema\/logo\/image\/"}},{"@type":"Person","@id":"https:\/\/sivite-machinery.com\/#\/schema\/person\/4866346b02efea9e0ffe5b3c0799de7f","name":"TAN, Mingli","image":{"@type":"ImageObject","inLanguage":"es","@id":"https:\/\/secure.gravatar.com\/avatar\/9f372e7cb6037c70f4c749bf9ba39ab5fec276a883b91cb823e368a04de99b0b?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/9f372e7cb6037c70f4c749bf9ba39ab5fec276a883b91cb823e368a04de99b0b?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/9f372e7cb6037c70f4c749bf9ba39ab5fec276a883b91cb823e368a04de99b0b?s=96&d=mm&r=g","caption":"TAN, mingli"},"sameAs":["https:\/\/sivite-machinery.com"],"url":"https:\/\/sivite-machinery.com\/es\/author\/sivitemachinery\/"}]}},"jetpack_featured_media_url":"https:\/\/sivite-machinery.com\/wp-content\/uploads\/2026\/09\/PET-Sheet-Extrusion-screw.jpg","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/sivite-machinery.com\/es\/wp-json\/wp\/v2\/posts\/3539","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sivite-machinery.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sivite-machinery.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sivite-machinery.com\/es\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/sivite-machinery.com\/es\/wp-json\/wp\/v2\/comments?post=3539"}],"version-history":[{"count":7,"href":"https:\/\/sivite-machinery.com\/es\/wp-json\/wp\/v2\/posts\/3539\/revisions"}],"predecessor-version":[{"id":3561,"href":"https:\/\/sivite-machinery.com\/es\/wp-json\/wp\/v2\/posts\/3539\/revisions\/3561"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sivite-machinery.com\/es\/wp-json\/wp\/v2\/media\/3540"}],"wp:attachment":[{"href":"https:\/\/sivite-machinery.com\/es\/wp-json\/wp\/v2\/media?parent=3539"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sivite-machinery.com\/es\/wp-json\/wp\/v2\/categories?post=3539"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sivite-machinery.com\/es\/wp-json\/wp\/v2\/tags?post=3539"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}