{"id":9597,"date":"2026-09-01T10:40:54","date_gmt":"2026-09-01T08:40:54","guid":{"rendered":"https:\/\/www.apiovan.com\/?post_type=product&#038;p=9597"},"modified":"2026-09-01T10:51:23","modified_gmt":"2026-09-01T08:51:23","slug":"rivestimento-in-silicone-herc-per-linee-di-estrusione-piana","status":"publish","type":"product","link":"https:\/\/www.apiovan.com\/it\/rivestimento-in-silicone-herc-per-linee-di-estrusione-piana\/","title":{"rendered":"Rivestimento in silicone HERC per linee di estrusione piana"},"content":{"rendered":"<p>Funzioni Principali nella Zona Estrusore Cast<\/p>\n<ul>\n<li><strong>Propriet\u00e0 antiaderenti (Release):<\/strong> Il silicone evita che la resina plastica fusa (PP, PE, PET, ecc.) appena uscita dalla testa piana si attacchi alla superficie del rullo pressore.<\/li>\n<li><strong>Resistenza termica elevata:<\/strong> Lavorando a ridosso della filiera piana, le mescole in silicone garantiscono stabilit\u00e0 strutturale e mantengono l&#8217;elasticit\u00e0 a temperature continue elevate (generalmente fino a <strong>200 \u00b0C<\/strong>, con punte speciali fino a <strong>300 \u00b0C<\/strong>).<\/li>\n<li><strong>Pressione omogenea:<\/strong> L&#8217;elasticit\u00e0 della gomma siliconica permette di esercitare una pressione uniforme sul film contro il <em>chill roll<\/em>, eliminando le bolle d&#8217;aria intrappolate e migliorando lo shock termico e la planarit\u00e0 del film.<\/li>\n<\/ul>\n<p>Specifiche Tecniche Tipiche per l&#8217;Estrusione Cast<\/p>\n<p>A seconda della specifica applicazione della linea cast, i cilindri gommati si differenziano per alcune caratteristiche cruciali delle mescole:<\/p>\n<ul>\n<li><strong>Durezza (Shore A): <\/strong>Mescole pi\u00f9 morbide (50-60 ShA) per una maggiore impronta; pi\u00f9 dure (70-80+ ShA) per una maggiore resistenza meccanica.<\/li>\n<li><strong>Finitura superficiale: <\/strong>Pu\u00f2 variare da liscia a leggermente opaca o goffrata a seconda dell&#8217;effetto estetico\/funzionale richiesto sul film plastico.<\/li>\n<\/ul>\n<p>La A.Piovan, specializzata nel converting e nell&#8217;estrusione, fornisce rivestimenti siliconici con formulazioni ad alto ritorno elastico: mantengono pressione e contatto costanti sul film, ciclo dopo ciclo, senza perdere geometria, per ottimizzare la durata del rullo riducendo i fermi macchina.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>I <strong>cilindri gommati in silicone<\/strong> nella zona dell&#8217;estrusore delle <strong>linee di estrusione film cast<\/strong> svolgono un ruolo fondamentale. A differenza del <em>chill roll<\/em> principale (che \u00e8 in acciaio cromato e raffreddato internamente), i rulli rivestiti in silicone operano a diretto contatto con il polimero fuso o semi-fuso ad alte temperature.<\/p>\n<p>La loro applicazione principale in questa specifica zona \u00e8 il <strong>rullo pressore (nip roller)<\/strong> della calandra di raffreddamento o i rulli di primo rinvio e traino, ed il nostro silicone \u201cHERC\u201d, un rivestimento in silicone ad alto ritorno elastico \u00e8 la risposta giusta per migliorare le prestazioni del processo<\/p>\n","protected":false},"featured_media":9601,"template":"","meta":{"_acf_changed":false,"content-type":"","site-sidebar-layout":"default","site-content-layout":"default","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":"default","adv-header-id-meta":"","stick-header-meta":"default","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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