{"id":1907,"date":"2026-10-09T08:00:00","date_gmt":"2026-10-09T00:00:00","guid":{"rendered":"https:\/\/bastone-petrochem.com\/?p=1907"},"modified":"2026-10-09T08:00:00","modified_gmt":"2026-10-09T00:00:00","slug":"difference-between-mfi-and-mfr","status":"publish","type":"post","link":"https:\/\/bastone-petrochem.com\/es\/difference-between-mfi-and-mfr\/","title":{"rendered":"\u00bfCu\u00e1l es la diferencia entre MFI y MFR?"},"content":{"rendered":"<p class=\"wp-block-paragraph\">MFI y MFR son la misma medici\u00f3n bajo dos nombres: \u00edndice de fluidez y tasa de fluidez ambos reportan cu\u00e1nto termopl\u00e1stico fundido extruye un dado est\u00e1ndar en 10 minutos a una temperatura y carga establecidas. La tasa de fluidez es el nombre que usan los est\u00e1ndares de ensayo ISO y ASTM actuales; el \u00edndice de fluidez es el nombre m\u00e1s antiguo para el mismo m\u00e9todo y todav\u00eda est\u00e1 en uso.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Un MFI en una hoja de datos y un MFR en otra se pueden comparar directamente si ambos se midieron a la misma temperatura y carga. Verifique primero la unidad: en la literatura sobre polietileno, MFR tambi\u00e9n puede significar relaci\u00f3n de fluidez, una relaci\u00f3n de dos tasas de flujo sin unidad.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Qu\u00e9 miden MFI y MFR<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">MFI y MFR miden cu\u00e1nta resina fundida empuja un pist\u00f3n con peso a trav\u00e9s de un dado est\u00e1ndar a una temperatura fija, expresado como la masa extruida en 10 minutos.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La resina se funde en el barril calentado de un plast\u00f3metro de extrusi\u00f3n. Se cortan longitudes de extruido a intervalos cronometrados, se pesan y la masa se escala a 10 minutos. El resultado se cita en g\/10 min, que es el mismo n\u00famero en dg\/min.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Un valor m\u00e1s alto significa que el fundido fluye con m\u00e1s facilidad y, dentro de un mismo tipo de pol\u00edmero, generalmente significa una masa molar m\u00e1s baja.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">El ensayo se usa principalmente para control de calidad, para confirmar que los lotes de un grado fluyen de manera similar. Sus velocidades de cizallamiento est\u00e1n muy por debajo de las de la extrusi\u00f3n o el moldeo, por lo que un solo valor no siempre se correlaciona con c\u00f3mo se comporta una resina en el procesamiento.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">MVR, la tasa de fluidez volum\u00e9trica del fundido, proviene del mismo ensayo reportado como volumen, en cm\u00b3\/10 min. Se convierte a MFR mediante la densidad del fundido a la temperatura del ensayo, que es menor que la densidad s\u00f3lida que indica una hoja de datos.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">MFR (g\/10 min) = MVR (cm\u00b3\/10 min) \u00d7 densidad del fundido a la temperatura del ensayo (g\/cm\u00b3)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Un valor de fluidez del fundido en una hoja de datos o <a href=\"https:\/\/bastone-petrochem.com\/es\/read-resin-certificate-analysis\/\">certificado de an\u00e1lisis<\/a> no tiene significado sin su temperatura y carga. <a href=\"https:\/\/bastone-petrochem.com\/es\/product-category\/synthetic-resin\/pp\/\">Polypropylene<\/a> normalmente tiene un conjunto de condiciones permitido bajo ISO 1133, pero <a href=\"https:\/\/bastone-petrochem.com\/es\/product-category\/synthetic-resin\/pe\/\">polietileno<\/a> tiene cuatro cargas permitidas a la misma temperatura. Dos cifras tomadas a cargas diferentes nunca pertenecen a la misma columna de una comparaci\u00f3n, sin importar c\u00f3mo las llame cada hoja.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">La diferencia entre MFI y MFR<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">No hay diferencia en la medici\u00f3n: <a href=\"https:\/\/goldbook.iupac.org\/terms\/view\/12787\">El glosario de pol\u00edmeros de la IUPAC<\/a> tiene \u00edndice de fluidez como su entrada y enumera tasa de fluidez y MFR como sin\u00f3nimos. Lo que difiere es qu\u00e9 documentos usan qu\u00e9 nombre, y las letras MFR conllevan un segundo significado.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Nombre y est\u00e1ndar<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Los est\u00e1ndares de ensayo ISO y ASTM actuales usan tasa de fluidez. <a href=\"https:\/\/www.iso.org\/standard\/83905.html\">ISO 1133-1:2022<\/a> cubre la tasa de fluidez m\u00e1sica del fundido (MFR) y la tasa de fluidez volum\u00e9trica del fundido (MVR) de termopl\u00e1sticos, y <a href=\"https:\/\/store.astm.org\/d1238-26.html\">ASTM D1238-26<\/a> es el m\u00e9todo de ensayo para las tasas de fluidez del fundido de termopl\u00e1sticos mediante plast\u00f3metro de extrusi\u00f3n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">El \u00edndice de fluidez es el nombre hist\u00f3rico del m\u00e9todo y todav\u00eda est\u00e1 en uso. Para el polietileno ensayado seg\u00fan ASTM D1238, el \u00edndice de fluidez nombra el resultado a 190 \u00b0C bajo 2,16 kg.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">El nombre no le dice a qu\u00e9 est\u00e1ndar se midi\u00f3 una cifra; el m\u00e9todo de ensayo impreso junto al valor identifica el est\u00e1ndar.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Por definici\u00f3n, MFI es una masa por 10 minutos. El uso es m\u00e1s flexible que la definici\u00f3n, as\u00ed que lea la unidad: g\/10 min es una tasa m\u00e1sica y cm\u00b3\/10 min una tasa volum\u00e9trica.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Un valor medido seg\u00fan ASTM D1238 se puede colocar junto a uno medido seg\u00fan ISO 1133 a la misma temperatura y carga, porque las diferencias entre los dos m\u00e9todos son peque\u00f1as. Cuando un valor est\u00e1 cerca de un l\u00edmite de especificaci\u00f3n, h\u00e1galo medir seg\u00fan el est\u00e1ndar con el que se escribi\u00f3 el l\u00edmite.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Cuando MFR significa relaci\u00f3n de fluidez<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">MFR significa relaci\u00f3n de fluidez cuando la cifra compara los resultados a dos cargas: la tasa de flujo a una carga alta dividida por la tasa de flujo a una carga baja. Este uso aparece en la literatura sobre polietileno, en particular en patentes, donde la relaci\u00f3n es t\u00edpicamente el resultado a 21,6 kg sobre el resultado a 2,16 kg, escrito I21\/I2.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La unidad separa las dos. Una tasa de fluidez siempre lleva una unidad, g\/10 min o dg\/min, mientras que la relaci\u00f3n es un n\u00famero simple con dos cargas nombradas.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Los est\u00e1ndares de ensayo llaman a esta cifra la relaci\u00f3n de tasas de flujo, abreviada FRR en ASTM D1238.<\/p>","protected":false},"excerpt":{"rendered":"<p>MFI and MFR are the same measurement under two names: melt flow index and melt flow rate both report how much molten thermoplastic a standard die extrudes in 10 minutes at a set temperature and load. Melt flow rate is the name today&#8217;s ISO and ASTM test standards use; melt flow index is the older [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1907","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"blocksy_meta":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>What Is the Difference Between MFI and MFR - BASTONE<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/bastone-petrochem.com\/es\/difference-between-mfi-and-mfr\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What Is the Difference Between MFI and MFR - BASTONE\" \/>\n<meta property=\"og:description\" content=\"MFI and MFR are the same measurement under two names: melt flow index and melt flow rate both report how much molten thermoplastic a standard die extrudes in 10 minutes at a set temperature and load. Melt flow rate is the name today&#8217;s ISO and ASTM test standards use; melt flow index is the older [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/bastone-petrochem.com\/es\/difference-between-mfi-and-mfr\/\" \/>\n<meta property=\"og:site_name\" content=\"BASTONE\" \/>\n<meta property=\"article:published_time\" content=\"2026-10-09T00:00:00+00:00\" \/>\n<meta name=\"author\" content=\"Stoneexpert\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/bastone-petrochem.com\/difference-between-mfi-and-mfr\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/bastone-petrochem.com\/difference-between-mfi-and-mfr\/\"},\"author\":{\"name\":\"Stoneexpert\",\"@id\":\"https:\/\/bastone-petrochem.com\/#\/schema\/person\/e7ac5c8da49e0875ec220147ea11b63b\"},\"headline\":\"What Is the Difference Between MFI and MFR\",\"datePublished\":\"2026-10-09T00:00:00+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/bastone-petrochem.com\/difference-between-mfi-and-mfr\/\"},\"wordCount\":702,\"publisher\":{\"@id\":\"https:\/\/bastone-petrochem.com\/#organization\"},\"articleSection\":[\"Uncategorized\"],\"inLanguage\":\"es\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/bastone-petrochem.com\/difference-between-mfi-and-mfr\/\",\"url\":\"https:\/\/bastone-petrochem.com\/difference-between-mfi-and-mfr\/\",\"name\":\"What Is the Difference Between MFI and MFR - BASTONE\",\"isPartOf\":{\"@id\":\"https:\/\/bastone-petrochem.com\/#website\"},\"datePublished\":\"2026-10-09T00:00:00+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/bastone-petrochem.com\/difference-between-mfi-and-mfr\/#breadcrumb\"},\"inLanguage\":\"es\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/bastone-petrochem.com\/difference-between-mfi-and-mfr\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/bastone-petrochem.com\/difference-between-mfi-and-mfr\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/bastone-petrochem.com\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"What Is the Difference Between MFI and MFR\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/bastone-petrochem.com\/#website\",\"url\":\"https:\/\/bastone-petrochem.com\/\",\"name\":\"BASTONE\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\/\/bastone-petrochem.com\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/bastone-petrochem.com\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"es\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/bastone-petrochem.com\/#organization\",\"name\":\"BASTONE\",\"url\":\"https:\/\/bastone-petrochem.com\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"es\",\"@id\":\"https:\/\/bastone-petrochem.com\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/bastone-petrochem.com\/wp-content\/uploads\/2022\/12\/cropped-site_icon-1.png\",\"contentUrl\":\"https:\/\/bastone-petrochem.com\/wp-content\/uploads\/2022\/12\/cropped-site_icon-1.png\",\"width\":512,\"height\":512,\"caption\":\"BASTONE\"},\"image\":{\"@id\":\"https:\/\/bastone-petrochem.com\/#\/schema\/logo\/image\/\"}},{\"@type\":\"Person\",\"@id\":\"https:\/\/bastone-petrochem.com\/#\/schema\/person\/e7ac5c8da49e0875ec220147ea11b63b\",\"name\":\"Stoneexpert\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"es\",\"@id\":\"https:\/\/bastone-petrochem.com\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/ccbc3bd4b33231373976b8b8852b2182bef518e4e4af70fdf506c36010f421ec?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/ccbc3bd4b33231373976b8b8852b2182bef518e4e4af70fdf506c36010f421ec?s=96&d=mm&r=g\",\"caption\":\"Stoneexpert\"},\"url\":\"https:\/\/bastone-petrochem.com\/es\/author\/zmd88259886gmail-com\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"\u00bfCu\u00e1l es la diferencia entre MFI y MFR? - BASTONE","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:\/\/bastone-petrochem.com\/es\/difference-between-mfi-and-mfr\/","og_locale":"es_ES","og_type":"article","og_title":"What Is the Difference Between MFI and MFR - BASTONE","og_description":"MFI and MFR are the same measurement under two names: melt flow index and melt flow rate both report how much molten thermoplastic a standard die extrudes in 10 minutes at a set temperature and load. Melt flow rate is the name today&#8217;s ISO and ASTM test standards use; melt flow index is the older [&hellip;]","og_url":"https:\/\/bastone-petrochem.com\/es\/difference-between-mfi-and-mfr\/","og_site_name":"BASTONE","article_published_time":"2026-10-09T00:00:00+00:00","author":"Stoneexpert","twitter_card":"summary_large_image","schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/bastone-petrochem.com\/difference-between-mfi-and-mfr\/#article","isPartOf":{"@id":"https:\/\/bastone-petrochem.com\/difference-between-mfi-and-mfr\/"},"author":{"name":"Stoneexpert","@id":"https:\/\/bastone-petrochem.com\/#\/schema\/person\/e7ac5c8da49e0875ec220147ea11b63b"},"headline":"What Is the Difference Between MFI and MFR","datePublished":"2026-10-09T00:00:00+00:00","mainEntityOfPage":{"@id":"https:\/\/bastone-petrochem.com\/difference-between-mfi-and-mfr\/"},"wordCount":702,"publisher":{"@id":"https:\/\/bastone-petrochem.com\/#organization"},"articleSection":["Uncategorized"],"inLanguage":"es"},{"@type":"WebPage","@id":"https:\/\/bastone-petrochem.com\/difference-between-mfi-and-mfr\/","url":"https:\/\/bastone-petrochem.com\/difference-between-mfi-and-mfr\/","name":"\u00bfCu\u00e1l es la diferencia entre MFI y MFR? - BASTONE","isPartOf":{"@id":"https:\/\/bastone-petrochem.com\/#website"},"datePublished":"2026-10-09T00:00:00+00:00","breadcrumb":{"@id":"https:\/\/bastone-petrochem.com\/difference-between-mfi-and-mfr\/#breadcrumb"},"inLanguage":"es","potentialAction":[{"@type":"ReadAction","target":["https:\/\/bastone-petrochem.com\/difference-between-mfi-and-mfr\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/bastone-petrochem.com\/difference-between-mfi-and-mfr\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/bastone-petrochem.com\/"},{"@type":"ListItem","position":2,"name":"What Is the Difference Between MFI and MFR"}]},{"@type":"WebSite","@id":"https:\/\/bastone-petrochem.com\/#website","url":"https:\/\/bastone-petrochem.com\/","name":"BAST\u00d3N","description":"","publisher":{"@id":"https:\/\/bastone-petrochem.com\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/bastone-petrochem.com\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"es"},{"@type":"Organization","@id":"https:\/\/bastone-petrochem.com\/#organization","name":"BAST\u00d3N","url":"https:\/\/bastone-petrochem.com\/","logo":{"@type":"ImageObject","inLanguage":"es","@id":"https:\/\/bastone-petrochem.com\/#\/schema\/logo\/image\/","url":"https:\/\/bastone-petrochem.com\/wp-content\/uploads\/2022\/12\/cropped-site_icon-1.png","contentUrl":"https:\/\/bastone-petrochem.com\/wp-content\/uploads\/2022\/12\/cropped-site_icon-1.png","width":512,"height":512,"caption":"BASTONE"},"image":{"@id":"https:\/\/bastone-petrochem.com\/#\/schema\/logo\/image\/"}},{"@type":"Person","@id":"https:\/\/bastone-petrochem.com\/#\/schema\/person\/e7ac5c8da49e0875ec220147ea11b63b","name":"Stoneexpert","image":{"@type":"ImageObject","inLanguage":"es","@id":"https:\/\/bastone-petrochem.com\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/ccbc3bd4b33231373976b8b8852b2182bef518e4e4af70fdf506c36010f421ec?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/ccbc3bd4b33231373976b8b8852b2182bef518e4e4af70fdf506c36010f421ec?s=96&d=mm&r=g","caption":"Stoneexpert"},"url":"https:\/\/bastone-petrochem.com\/es\/author\/zmd88259886gmail-com\/"}]}},"_links":{"self":[{"href":"https:\/\/bastone-petrochem.com\/es\/wp-json\/wp\/v2\/posts\/1907","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/bastone-petrochem.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/bastone-petrochem.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/bastone-petrochem.com\/es\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/bastone-petrochem.com\/es\/wp-json\/wp\/v2\/comments?post=1907"}],"version-history":[{"count":1,"href":"https:\/\/bastone-petrochem.com\/es\/wp-json\/wp\/v2\/posts\/1907\/revisions"}],"predecessor-version":[{"id":1931,"href":"https:\/\/bastone-petrochem.com\/es\/wp-json\/wp\/v2\/posts\/1907\/revisions\/1931"}],"wp:attachment":[{"href":"https:\/\/bastone-petrochem.com\/es\/wp-json\/wp\/v2\/media?parent=1907"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bastone-petrochem.com\/es\/wp-json\/wp\/v2\/categories?post=1907"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bastone-petrochem.com\/es\/wp-json\/wp\/v2\/tags?post=1907"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}