{"id":911,"date":"2026-05-28T14:22:37","date_gmt":"2026-05-28T06:22:37","guid":{"rendered":"https:\/\/bastone-petrochem.com\/?p=911"},"modified":"2026-10-13T13:44:22","modified_gmt":"2026-10-13T05:44:22","slug":"what-is-polypropylene-resin","status":"publish","type":"post","link":"https:\/\/bastone-petrochem.com\/es\/what-is-polypropylene-resin\/","title":{"rendered":"\u00bfQu\u00e9 es el pl\u00e1stico de polipropileno?"},"content":{"rendered":"<p class=\"wp-block-paragraph\">El pl\u00e1stico de polipropileno es una poliolefina termopl\u00e1stica semicristalina, polimerizada a partir de gas propileno y se vende en forma de gr\u00e1nulos. Es el segundo termopl\u00e1stico b\u00e1sico de mayor volumen una vez que los <a href=\"https:\/\/bastone-petrochem.com\/es\/what-is-polyethylene-resin\/\">grados de polietileno<\/a> se cuentan como una sola familia.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">El pol\u00edmero base est\u00e1 autorizado para contacto con alimentos en EE. UU. seg\u00fan 21 CFR 177.1520. El BPA es un componente del policarbonato y de los revestimientos ep\u00f3xicos de latas, mientras que el polipropileno se polimeriza \u00fanicamente a partir de propileno. Lo que difiere entre dos art\u00edculos de PP es el paquete de aditivos y la transformaci\u00f3n, ambos especificados por el comprador.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Al polipropileno tambi\u00e9n se le asigna el c\u00f3digo de identificaci\u00f3n de resina 5.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">De Qu\u00e9 Est\u00e1 Hecho el Pl\u00e1stico de Polipropileno y C\u00f3mo Se Fabrica<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">El polipropileno se fabrica a partir de un solo mon\u00f3mero, el propileno, un gas recuperado del craqueo t\u00e9rmico de gas de refiner\u00eda y del craqueo catal\u00edtico de aceite pesado, con la deshidrogenaci\u00f3n de propano como tercera v\u00eda.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Casi todo el PP comercial se polimeriza sobre catalizadores heterog\u00e9neos Ziegler-Natta. Los metalocenos son la alternativa de sitio \u00fanico, con un control m\u00e1s estricto del peso molecular, los grupos terminales y la estereorregularidad.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Los grupos metilo pueden adoptar varias disposiciones espaciales a lo largo de la cadena, y solo la forma isot\u00e1ctica, con todos ellos en el mismo lado, se comercializa en cantidad significativa.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La resina sale del reactor en forma de polvo. Se homogeneiza en una extrusora de doble husillo, se corta en gr\u00e1nulos bajo el agua y se mezcla por lotes antes de su env\u00edo.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Propiedades del Pl\u00e1stico de Polipropileno<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">El polipropileno es semirr\u00edgido: m\u00e1s r\u00edgido y duro que el polietileno, con un punto de fusi\u00f3n m\u00e1s alto, y m\u00e1s flexible que el ABS o el nailon \u2014 <a href=\"https:\/\/bastone-petrochem.com\/es\/polypropylene-vs-plastic-family\/\">d\u00f3nde se sit\u00faa entre los pl\u00e1sticos b\u00e1sicos<\/a>.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>Propiedad<\/th><th>Valor t\u00edpico del homopol\u00edmero<\/th><th>M\u00e9todo de prueba<\/th><\/tr><\/thead><tbody><tr><td>Densidad<\/td><td>905 g\/cm\u00b3<\/td><td>ISO 1183<\/td><\/tr><tr><td>Punto de fusi\u00f3n<\/td><td>160\u2013165 \u00b0C<\/td><td>ISO 3146<\/td><\/tr><tr><td>M\u00f3dulo de flexi\u00f3n<\/td><td>200\u20131.450 MPa<\/td><td>ISO 178<\/td><\/tr><tr><td>Resistencia a la tracci\u00f3n en el punto de fluencia<\/td><td>30\u201333 MPa<\/td><td>ISO 527-2<\/td><\/tr><tr><td>Temperatura de deflexi\u00f3n t\u00e9rmica<\/td><td>100 \u00b0C a 0,45 MPa; 55 \u00b0C a 1,80 MPa<\/td><td>ISO 75-2<\/td><\/tr><tr><td>Impacto Charpy con entalla, 23 \u00b0C<\/td><td>6 kJ\/m\u00b2<\/td><td>ISO 179<\/td><\/tr><tr><td>\u00cdndice de fluidez<\/td><td>3 g\/10 min (grado de uso general)<\/td><td>ISO 1133, 230 \u00b0C \/ 2,16 kg<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Con 0,905 g\/cm\u00b3, el polipropileno es el m\u00e1s ligero de los pl\u00e1sticos b\u00e1sicos.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La temperatura de servicio est\u00e1 muy por debajo del <a href=\"https:\/\/bastone-petrochem.com\/es\/melting-point-polypropylene\/\">rango de fusi\u00f3n<\/a>. Una pieza de PP sometida a carga funciona continuamente entre 0 y 80 \u00b0C, y alcanza unos 100 \u00b0C solo donde no soporta una tensi\u00f3n mec\u00e1nica significativa.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">El \u00edndice de fluidez es la mayor parte de lo que te indica un c\u00f3digo de grado de PP.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Dos cifras de MFR tomadas a diferentes cargas o temperaturas nunca pertenecen a la misma columna, y los dos est\u00e1ndares tampoco son intercambiables \u2014 <a href=\"https:\/\/store.astm.org\/d1238-23.html\">ASTM D1238<\/a> se\u00f1ala que este y la ISO 1133 abordan el mismo tema pero difieren en contenido t\u00e9cnico. Verifica contra qu\u00e9 est\u00e1ndar se redact\u00f3 un <a href=\"https:\/\/bastone-petrochem.com\/es\/read-resin-certificate-analysis\/\">certificado de an\u00e1lisis<\/a> antes de colocarlo junto a una hoja de datos.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Cu\u00e1les Son las Desventajas del Polipropileno<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Las desventajas del polipropileno son la fragilidad a baja temperatura, la sensibilidad a los rayos UV, la oxidaci\u00f3n, la contracci\u00f3n de moldeo y la inflamabilidad. Cada una requiere una correcci\u00f3n est\u00e1ndar, ya sea un cambio de grado o un <a href=\"https:\/\/bastone-petrochem.com\/es\/what-additives-are-used-polypropylene\/\">paquete de aditivos<\/a>, y ninguna de ellas exige un pol\u00edmero diferente.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Fragilidad a baja temperatura<\/strong>: el Charpy con entalla del homopol\u00edmero es de 6 kJ\/m\u00b2 a 23 \u00b0C. Un copol\u00edmero heterof\u00e1sico de grado para extrusi\u00f3n a\u00fan devuelve 8 kJ\/m\u00b2 a \u221220 \u00b0C, pero lee la fila de impacto a tu propia temperatura.<\/li>\n\n\n\n<li><strong>Sensibilidad a los rayos UV<\/strong>: el PP sin pigmentar se decolora y pierde propiedades mec\u00e1nicas en exteriores. Los absorbentes de UV, los estabilizadores de luz o el negro de carbono lo prolongan.<\/li>\n\n\n\n<li><strong>Oxidaci\u00f3n<\/strong>: el carbono terciario en cada segundo \u00e1tomo de la cadena principal es donde comienza la degradaci\u00f3n t\u00e9rmica. Todo grado comercial lleva un paquete de antioxidantes.<\/li>\n\n\n\n<li><strong>Contracci\u00f3n de moldeo y alabeo<\/strong>: la contracci\u00f3n es alta para un termopl\u00e1stico b\u00e1sico y depende de la direcci\u00f3n. La nucleaci\u00f3n y el relleno mineral, generalmente talco o fibra de vidrio, son las correcciones est\u00e1ndar.<\/li>\n\n\n\n<li><strong>Inflamabilidad<\/strong>: con un \u00edndice de ox\u00edgeno l\u00edmite de alrededor de 17, el PP arde f\u00e1cilmente en el aire. Existen grados ign\u00edfugos para las aplicaciones que requieren una clasificaci\u00f3n.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Los Tres Tipos de Polipropileno<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Los tres tipos comerciales son homopol\u00edmero, copol\u00edmero aleatorio y copol\u00edmero de impacto (heterof\u00e1sico). Se diferencian por el comon\u00f3mero \u2014 lo que se alimenta a cada reactor.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>Tipo<\/th><th>Qu\u00e9 se polimeriza<\/th><th>Qu\u00e9 cambia<\/th><th>A d\u00f3nde va<\/th><\/tr><\/thead><tbody><tr><td>Homopol\u00edmero<\/td><td>Propileno solo<\/td><td>Mayor rigidez y punto de fusi\u00f3n, impacto m\u00e1s d\u00e9bil por debajo de la temperatura ambiente<\/td><td>Cinta de rafia, pel\u00edcula BOPP, fibra, moldeo por inyecci\u00f3n general<\/td><\/tr><tr><td>Copol\u00edmero aleatorio<\/td><td>Propileno con 0,1\u20138 mol% de etileno en el mismo reactor<\/td><td>Permanece monof\u00e1sico, por lo que la claridad aumenta y el punto de fusi\u00f3n disminuye; m\u00e1s blando<\/td><td>Envases transparentes, tuber\u00eda de agua caliente y fr\u00eda<\/td><\/tr><tr><td>El copol\u00edmero de impacto<\/td><td>Primero homopol\u00edmero, luego una fase de caucho etileno-propileno en un reactor de fase gaseosa<\/td><td>Resistencia al impacto a baja temperatura, pagada con rigidez y claridad<\/td><td>Cajas, piezas automotrices, envases para almacenamiento en fr\u00edo<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">El PP compuesto despu\u00e9s del reactor con un elast\u00f3mero comprado es un producto separado en una ruta separada.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Para qu\u00e9 se usa el pl\u00e1stico de polipropileno<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">El polipropileno se transforma en todas las rutas de productos b\u00e1sicos \u2014 moldeo por inyecci\u00f3n, pel\u00edcula, fibra, tuber\u00eda y l\u00e1mina \u2014 y cada ruta requiere un <a href=\"https:\/\/bastone-petrochem.com\/es\/product-category\/synthetic-resin\/pp\/\">grado de polipropileno<\/a>, definido primero por el \u00edndice de fluidez y luego <a href=\"https:\/\/bastone-petrochem.com\/es\/decide-between-three-main-grades-polypropylene-resin\/\">por tipo<\/a>.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>Proceso de transformaci\u00f3n<\/th><th>Productos t\u00edpicos<\/th><th>Tipo generalmente especificado<\/th><\/tr><\/thead><tbody><tr><td>Moldeo por inyecci\u00f3n<\/td><td>Cierres con bisagras vivas, <a href=\"https:\/\/bastone-petrochem.com\/es\/pp-grade-thin-wall-injection-molding\/\">envases de pared delgada<\/a>, cajas, piezas automotrices interiores y bajo el cap\u00f3<\/td><td>Homopol\u00edmero para pared delgada, copol\u00edmero de impacto para cajas y automotriz<\/td><\/tr><tr><td>Pel\u00edcula<\/td><td>Pel\u00edcula BOPP y CPP para envasado y laminaci\u00f3n<\/td><td>Homopol\u00edmero<\/td><\/tr><tr><td>Fibra y rafia<\/td><td><a href=\"https:\/\/bastone-petrochem.com\/es\/polypropylene-raffia-grade-woven-sack-line\/\">Sacos tejidos y FIBC<\/a>, no tejidos spunbond, hilo para alfombras, cuerda<\/td><td>Homopol\u00edmero<\/td><\/tr><tr><td>Tuber\u00eda<\/td><td><a href=\"https:\/\/bastone-petrochem.com\/es\/pp-grade-ppr-pipe-line\/\">Tuber\u00eda de agua caliente y fr\u00eda<\/a> sistemas, especificados por ISO 15874<\/td><td>Copol\u00edmero aleatorio (PP-R)<\/td><\/tr><tr><td>L\u00e1mina y termoformado<\/td><td>L\u00e1mina corrugada, tanques fabricados y conductos, macetas y vasos termoformados<\/td><td>Grados de l\u00e1mina de homopol\u00edmero o copol\u00edmero<\/td><\/tr><\/tbody><\/table><\/figure>","protected":false},"excerpt":{"rendered":"<p>Polypropylene plastic is a semi-crystalline thermoplastic polyolefin, polymerised from propylene gas and sold as pellets. It is the second-largest commodity thermoplastic by volume once the polyethylene grades are counted as one family. The base polymer is cleared for food contact in the US under 21 CFR 177.1520. BPA is a building block of polycarbonate and [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":953,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_lmt_disableupdate":"","_lmt_disable":"","footnotes":""},"categories":[64],"tags":[68],"class_list":["post-911","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-material-basics","tag-polypropylene"],"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 Polypropylene Plastic - 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\/what-is-polypropylene-resin\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What Is Polypropylene Plastic - BASTONE\" \/>\n<meta property=\"og:description\" content=\"Polypropylene plastic is a semi-crystalline thermoplastic polyolefin, polymerised from propylene gas and sold as pellets. It is the second-largest commodity thermoplastic by volume once the polyethylene grades are counted as one family. The base polymer is cleared for food contact in the US under 21 CFR 177.1520. 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It is the second-largest commodity thermoplastic by volume once the polyethylene grades are counted as one family. The base polymer is cleared for food contact in the US under 21 CFR 177.1520. 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