{"id":13509,"date":"2023-04-03T03:59:06","date_gmt":"2023-04-03T03:59:06","guid":{"rendered":"https:\/\/hansaplas.com\/?p=13509"},"modified":"2023-04-06T01:18:27","modified_gmt":"2023-04-06T01:18:27","slug":"quali-sono-le-proprieta-del-ptfe-la-guida-definitiva","status":"publish","type":"post","link":"https:\/\/hansaplas.com\/it\/proprieta-del-ptfe\/","title":{"rendered":"Quali sono le propriet\u00e0 del PTFE? La guida definitiva"},"content":{"rendered":"<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-13539 aligncenter\" src=\"http:\/\/hansaplas.com\/wp-content\/uploads\/2023\/04\/PTFE-Properties.jpg\" alt=\"Propriet\u00e0 del PTFE\" width=\"800\" height=\"450\" srcset=\"https:\/\/hansaplas.com\/wp-content\/uploads\/2023\/04\/PTFE-Properties.jpg 800w, https:\/\/hansaplas.com\/wp-content\/uploads\/2023\/04\/PTFE-Properties-768x432.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/p>\n<p>Il PTFE \u00e8 un materiale unico con atomi di fluoro e carbonio. Generalmente, il materiale \u00e8 idrofobo, non appiccicoso, non reattivo, ha un&#039;elevata densit\u00e0 ed \u00e8 resistente alle alte temperature.<\/p>\n<p>Ci\u00f2 lo rende una scelta perfetta per molte applicazioni<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_81 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/hansaplas.com\/it\/proprieta-del-ptfe\/#PTFE_Mechanical_Properties\" >Propriet\u00e0 meccaniche del PTFE<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/hansaplas.com\/it\/proprieta-del-ptfe\/#Tensile_and_Compressive_Properties\" >Propriet\u00e0 di trazione e compressione.<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/hansaplas.com\/it\/proprieta-del-ptfe\/#Flexibility\" >Flessibilit\u00e0<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/hansaplas.com\/it\/proprieta-del-ptfe\/#Hardness_of_PTFE\" >Durezza del PTFE<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/hansaplas.com\/it\/proprieta-del-ptfe\/#Coefficient_of_Friction\" >Coefficiente di attrito<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/hansaplas.com\/it\/proprieta-del-ptfe\/#Wear_Properties\" >Propriet\u00e0 di usura<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/hansaplas.com\/it\/proprieta-del-ptfe\/#Physical_Properties\" >Propriet\u00e0 fisiche<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/hansaplas.com\/it\/proprieta-del-ptfe\/#PTFE_Thermal_Properties\" >Propriet\u00e0 termiche del PTFE<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/hansaplas.com\/it\/proprieta-del-ptfe\/#Thermal_Stability\" >Stabilit\u00e0 termica<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/hansaplas.com\/it\/proprieta-del-ptfe\/#Transition_Points\" >Punti di transizione<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/hansaplas.com\/it\/proprieta-del-ptfe\/#Thermal_Expansion\" >Espansione termica<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/hansaplas.com\/it\/proprieta-del-ptfe\/#Thermal_Conductivity\" >Conduttivit\u00e0 termica<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/hansaplas.com\/it\/proprieta-del-ptfe\/#Specific_Heat\" >Calore specifico<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/hansaplas.com\/it\/proprieta-del-ptfe\/#Electrical_Properties_of_PTFE\" >Propriet\u00e0 elettriche del PTFE<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/hansaplas.com\/it\/proprieta-del-ptfe\/#Dielectric_strength\" >Rigidit\u00e0 dielettrica<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/hansaplas.com\/it\/proprieta-del-ptfe\/#Dielectric_Constant_and_Dissipation_Factor\" >Costante dielettrica e fattore di dissipazione<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/hansaplas.com\/it\/proprieta-del-ptfe\/#Arc_Resistance\" >Resistenza all&#039;arco<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/hansaplas.com\/it\/proprieta-del-ptfe\/#Corona_Effect\" >Effetto Corona<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/hansaplas.com\/it\/proprieta-del-ptfe\/#Optical_Properties_of_PTFE\" >Propriet\u00e0 ottiche del PTFE<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/hansaplas.com\/it\/proprieta-del-ptfe\/#Resistance_of_Light\" >Resistenza alla luce<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/hansaplas.com\/it\/proprieta-del-ptfe\/#Resistance_to_Radiation\" >Resistenza alle radiazioni<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/hansaplas.com\/it\/proprieta-del-ptfe\/#Other_PTFE_Material_Properties\" >Altre propriet\u00e0 del materiale PTFE<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/hansaplas.com\/it\/proprieta-del-ptfe\/#Plastic_%E2%80%9CMemory%E2%80%9D\" >\u201cMemoria\u201d di plastica<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/hansaplas.com\/it\/proprieta-del-ptfe\/#Gas_Permeability_of_PTFE\" >Permeabilit\u00e0 ai gas del PTFE<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/hansaplas.com\/it\/proprieta-del-ptfe\/#Resistant_to_Corrosion_by_Chemical\" >Resistente alla corrosione chimica<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/hansaplas.com\/it\/proprieta-del-ptfe\/#Solvent_Resistance\" >Resistenza ai solventi<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-27\" href=\"https:\/\/hansaplas.com\/it\/proprieta-del-ptfe\/#How_Additives_Fillers_Affect_PTFE_Material_Properties\" >Come gli additivi e i riempitivi influenzano le propriet\u00e0 del materiale PTFE<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-28\" href=\"https:\/\/hansaplas.com\/it\/proprieta-del-ptfe\/#Glass_Fiber\" >Fibra di vetro<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-29\" href=\"https:\/\/hansaplas.com\/it\/proprieta-del-ptfe\/#Adding_of_Carbon\" >Aggiunta di carbonio<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-30\" href=\"https:\/\/hansaplas.com\/it\/proprieta-del-ptfe\/#Carbon_Combined_with_Graphite\" >Carbonio combinato con grafite<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-31\" href=\"https:\/\/hansaplas.com\/it\/proprieta-del-ptfe\/#Bronze-filled_PTFE_Compound\" >Composto PTFE caricato bronzo<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-32\" href=\"https:\/\/hansaplas.com\/it\/proprieta-del-ptfe\/#Molybdenum_MoS2\" >Molybdenum (MoS2)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-33\" href=\"https:\/\/hansaplas.com\/it\/proprieta-del-ptfe\/#Calcium_Fluoride_CaF2\" >Calcium Fluoride (CaF2)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-34\" href=\"https:\/\/hansaplas.com\/it\/proprieta-del-ptfe\/#Mica\" >Mica<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-35\" href=\"https:\/\/hansaplas.com\/it\/proprieta-del-ptfe\/#Ekonol\" >Ekonol<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-36\" href=\"https:\/\/hansaplas.com\/it\/proprieta-del-ptfe\/#Wollastonite\" >Wollastonite<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-37\" href=\"https:\/\/hansaplas.com\/it\/proprieta-del-ptfe\/#Conclusion\" >Conclusione<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"PTFE_Mechanical_Properties\"><\/span>Propriet\u00e0 meccaniche del PTFE<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<figure id=\"attachment_13510\" aria-describedby=\"caption-attachment-13510\" style=\"width: 500px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-13510 size-full\" src=\"http:\/\/hansaplas.com\/wp-content\/uploads\/2023\/04\/Figure-1-PTFE-1.jpg\" alt=\"PTFE\" width=\"500\" height=\"350\" \/><figcaption id=\"caption-attachment-13510\" class=\"wp-caption-text\">PTFE<\/figcaption><\/figure>\n<h3><span class=\"ez-toc-section\" id=\"Tensile_and_Compressive_Properties\"><\/span>Propriet\u00e0 di trazione e compressione.<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Varia da un minimo di 10 MPa fino a un massimo di 35-40 MPa. Dipende dal materiale di riempimento utilizzato, dai parametri di stampaggio e anche dalla qualit\u00e0 della resina di base.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Flexibility\"><\/span>Flessibilit\u00e0<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Il modulo di flessione varia a seconda delle diverse temperature ambientali, come mostrato di seguito.<\/p>\n<table>\n<tbody>\n<tr>\n<td width=\"308\">Temperatura<\/td>\n<td width=\"308\">Modulo di flessione<\/td>\n<\/tr>\n<tr>\n<td width=\"308\">(20-22)<sup>0<\/sup>C.<\/td>\n<td width=\"308\">(350-650)N\/mm2<\/td>\n<\/tr>\n<tr>\n<td width=\"308\">-80<sup>0<\/sup>C.<\/td>\n<td width=\"308\">2000 N\/mm2<\/td>\n<\/tr>\n<tr>\n<td width=\"308\">100<sup>0<\/sup>C.<\/td>\n<td width=\"308\">200 N\/mm2<\/td>\n<\/tr>\n<tr>\n<td width=\"308\">260<sup>0<\/sup>C.<\/td>\n<td width=\"308\">45 N\/mm2<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3><span class=\"ez-toc-section\" id=\"Hardness_of_PTFE\"><\/span>Durezza del PTFE<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<table>\n<tbody>\n<tr>\n<td width=\"308\">Metodo di misurazione<\/td>\n<td width=\"308\">Valore<\/td>\n<\/tr>\n<tr>\n<td width=\"308\">ASTMD 2240<\/td>\n<td width=\"308\">D50-D60.<\/td>\n<\/tr>\n<tr>\n<td width=\"308\">DIN 5345<\/td>\n<td width=\"308\">(27-32) N\/mm2<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3><span class=\"ez-toc-section\" id=\"Coefficient_of_Friction\"><\/span>Coefficiente di attrito<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<div class=\"ast-oembed-container\" style=\"height: 100%;\"><iframe loading=\"lazy\" title=\"Che cosa \u00e8 il politetrafluoroetilene (PTFE, Teflon) e a cosa serve?\" width=\"500\" height=\"375\" src=\"https:\/\/www.youtube.com\/embed\/lA0ytKrWa_o?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/div>\n<p>&nbsp;<\/p>\n<p>Un basso coefficiente di attrito, compreso tra 0,05 e 0,09. Solitamente \u00e8 costante a temperatura ambiente.<\/p>\n<p>Tuttavia il coefficiente di attrito cambia in base ai seguenti fattori:<\/p>\n<ol>\n<li>Aumentando il carico di un oggetto che scivola sulla superficie del PTFE, il coefficiente di attrito diminuisce.<\/li>\n<li>Aumenta con l&#039;aumentare della velocit\u00e0 dell&#039;oggetto in planata.<\/li>\n<\/ol>\n<h3><span class=\"ez-toc-section\" id=\"Wear_Properties\"><\/span>Propriet\u00e0 di usura<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Questo dipende dalla superficie dei materiali che scorrono sul PTFE, dalla velocit\u00e0 di scorrimento e dal carico dei materiali. Di solito, questo rende il PTFE molto poco resistente all&#039;usura, rendendolo quindi adatto solo per carichi leggeri ma non per carichi pesanti.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Physical_Properties\"><\/span>Propriet\u00e0 fisiche<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Le principali propriet\u00e0 fisiche includono:<\/p>\n<ul>\n<li>03% assorbimento massimo dell&#039;acqua<\/li>\n<li>Densit\u00e0 apparente apparente da 36 a 0,91 g\/cc<\/li>\n<li>01 a 0,058 restringimento lineare<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"PTFE_Thermal_Properties\"><\/span>Propriet\u00e0 termiche del PTFE<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<figure id=\"attachment_13511\" aria-describedby=\"caption-attachment-13511\" style=\"width: 500px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-13511 size-full\" src=\"http:\/\/hansaplas.com\/wp-content\/uploads\/2023\/04\/Figure-2-PTFE-temperature-characteristics.jpg\" alt=\"Caratteristiche della temperatura del PTFE\" width=\"500\" height=\"350\" \/><figcaption id=\"caption-attachment-13511\" class=\"wp-caption-text\">Caratteristiche della temperatura del PTFE<\/figcaption><\/figure>\n<h3><span class=\"ez-toc-section\" id=\"Thermal_Stability\"><\/span>Stabilit\u00e0 termica<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Il PTFE \u00e8 termicamente stabile.<\/p>\n<p>La sua decomposizione tramite calore inizia a verificarsi a temperature superiori a 400<sup>0<\/sup>C.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Transition_Points\"><\/span>Punti di transizione<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>La struttura molecolare del PTFE cambia in base alla variazione di temperatura. A 19<sup>0<\/sup>C e 30<sup>0<\/sup>Avviene la trasformazione del cristallo di C. Mentre alla temperatura di 327<sup>0<\/sup>C, si verifica uno sbiadimento della struttura cristallina.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Thermal_Expansion\"><\/span>Espansione termica<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Questo varia a seconda della temperatura e cambia anche relativamente in base ai cambi di direzione.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Thermal_Conductivity\"><\/span>Conduttivit\u00e0 termica<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>La bassa conduttivit\u00e0 termica rende il PTFE un buon materiale isolante. Questa pu\u00f2 essere aumentata aggiungendo riempitivi.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Specific_Heat\"><\/span>Calore specifico<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Il contenuto termico aumenta con la temperatura. Quando la temperatura \u00e8 elevata, il contenuto termico del PTFE aumenta.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Electrical_Properties_of_PTFE\"><\/span>Propriet\u00e0 elettriche del PTFE<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Dielectric_strength\"><\/span>Rigidit\u00e0 dielettrica<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Lo spessore del PTFE \u00e8 direttamente proporzionale allo spessore del materiale. Analogamente, diminuisce anche con l&#039;aumentare della frequenza.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Dielectric_Constant_and_Dissipation_Factor\"><\/span>Costante dielettrica e fattore di dissipazione<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Ha un fattore di dissipazione molto basso, compreso tra 0,0001 e 0,0003. Questo rimane costante fino a temperature di 300<sup>0<\/sup>c e una frequenza di 109 Hz. Il PTFE ha una costante dielettrica di 2,1.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Arc_Resistance\"><\/span>Resistenza all&#039;arco<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>La resistenza all&#039;arco \u00e8 la capacit\u00e0 di un isolante di resistere ad alta tensione senza formare un percorso conduttivo lungo la sua superficie. Il PTFE ha una buona resistenza di 300 secondi.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Corona_Effect\"><\/span>Effetto Corona<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>L&#039;effetto corona \u00e8 la ionizzazione dell&#039;aria circostante un conduttore, che produce un bagliore e un sibilo. L&#039;effetto corona provoca erosioni sulla superficie del PTFE.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Optical_Properties_of_PTFE\"><\/span>Propriet\u00e0 ottiche del PTFE<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<figure id=\"attachment_13512\" aria-describedby=\"caption-attachment-13512\" style=\"width: 500px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-13512 size-full\" src=\"http:\/\/hansaplas.com\/wp-content\/uploads\/2023\/04\/Figure-3-Transluscent-PTFE.jpg\" alt=\"PTFE traslucido\" width=\"500\" height=\"350\" \/><figcaption id=\"caption-attachment-13512\" class=\"wp-caption-text\">PTFE traslucido<\/figcaption><\/figure>\n<h3><span class=\"ez-toc-section\" id=\"Resistance_of_Light\"><\/span>Resistenza alla luce<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Alcuni campioni di prova, esposti a oltre 20 anni di luce solare, non mostrano alcun cambiamento. Ci\u00f2 dimostra che il PTFE \u00e8 resistente alla decomposizione causata dalla luce solare.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Resistance_to_Radiation\"><\/span>Resistenza alle radiazioni<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Ha una scarsa resistenza alle radiazioni. Ci\u00f2 \u00e8 dovuto alla sua decomposizione quando esposto a radiazioni ad alta intensit\u00e0.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Other_PTFE_Material_Properties\"><\/span>Altre propriet\u00e0 del materiale PTFE<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Plastic_%E2%80%9CMemory%E2%80%9D\"><\/span>\u201cMemoria\u201d di plastica<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>I materiali in PTFE, una volta deformati, mantengono la loro forma originale anche dopo essere stati riscaldati. Il PTFE ha una buona memoria plastica.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Gas_Permeability_of_PTFE\"><\/span>Permeabilit\u00e0 ai gas del PTFE<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Questa \u00e8 la capacit\u00e0 del gas di diffondersi attraverso un materiale quando la pressione tra le due superfici \u00e8 diversa. La permeabilit\u00e0 ai gas del PTFE dipende dallo spessore, dalla pressione tra le due superfici e dalle tecniche di lavorazione del materiale PTFE.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Resistant_to_Corrosion_by_Chemical\"><\/span>Resistente alla corrosione chimica<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Il PTFE non \u00e8 influenzato dalla maggior parte dei composti e degli elementi noti. \u00c8 influenzato da:<\/p>\n<ul>\n<li>Metalli alcalini allo stato elementare<\/li>\n<li>trifluoruro di cloro<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Solvent_Resistance\"><\/span>Resistenza ai solventi<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Non pu\u00f2 dissolversi nella maggior parte dei solventi, ad eccezione degli oli altamente fluorurati a temperature superiori a 300<sup>0<\/sup>C<\/p>\n<h2><span class=\"ez-toc-section\" id=\"How_Additives_Fillers_Affect_PTFE_Material_Properties\"><\/span>Come gli additivi e i riempitivi influenzano le propriet\u00e0 del materiale PTFE<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<figure id=\"attachment_13513\" aria-describedby=\"caption-attachment-13513\" style=\"width: 500px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-13513 size-full\" src=\"http:\/\/hansaplas.com\/wp-content\/uploads\/2023\/04\/Figure-4-PTFE-gasket.jpg\" alt=\"Guarnizione in PTFE\" width=\"500\" height=\"350\" \/><figcaption id=\"caption-attachment-13513\" class=\"wp-caption-text\">Guarnizione in PTFE<\/figcaption><\/figure>\n<h3><span class=\"ez-toc-section\" id=\"Glass_Fiber\"><\/span>Fibra di vetro<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Riduce la velocit\u00e0 di creep, ovvero la deformazione causata da pressione e tempo. La fibra di vetro rende inoltre il PTFE resistente all&#039;usura, agli agenti chimici e adatto a pressioni superficiali pi\u00f9 elevate. Utilizzato per la realizzazione di anelli, boccole, raccordi filettati, ecc.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Adding_of_Carbon\"><\/span>Aggiunta di carbonio<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Il carbonio dovrebbe essere utilizzato in polvere o in fibra. Riduce la velocit\u00e0 di scorrimento, aumenta la conduttivit\u00e0 termica e migliora la resistenza alla compressione.<\/p>\n<p>Inoltre, rende il PTFE pi\u00f9 resistente all&#039;usura e pi\u00f9 conduttivo elettricamente.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Carbon_Combined_with_Graphite\"><\/span>Carbonio combinato con grafite<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Riduce l&#039;usura del PTFE grazie al basso coefficiente di attrito. Idealmente, fornisce una lubrificazione &quot;perfetta&quot;.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Bronze-filled_PTFE_Compound\"><\/span>Composto PTFE caricato bronzo<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li>Risulta in un aumento della conduttivit\u00e0 termica<\/li>\n<li>Migliora la conduttivit\u00e0 elettrica<\/li>\n<li>Lo rende pi\u00f9 resistente alla pressione<\/li>\n<li>Migliora le propriet\u00e0 di resistenza allo scorrimento<\/li>\n<\/ul>\n<p>Ha un&#039;elevata resistenza all&#039;attrito che pu\u00f2 essere ridotta con l&#039;aggiunta di MoS<sub>2<\/sub>.<\/p>\n<p>Tra gli svantaggi rientra la possibile ossidazione, a cui si aggiunge la scarsa resistenza chimica.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Molybdenum_MoS2\"><\/span>Molibdeno (MoS<sub>2<\/sub>)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Il molibdeno ha un effetto lubrificante che conferisce al materiale propriet\u00e0 antiattrito.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Calcium_Fluoride_CaF2\"><\/span>Fluoruro di calcio (CaF<sub>2<\/sub>)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Utilizzato come alternativa alla fibra di vetro se quest&#039;ultima non \u00e8 adatta a causa della sua resistenza chimica. Viene utilizzato nella produzione di guarnizioni e nella realizzazione di applicazioni elettroniche.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Mica\"><\/span>Mica<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>La mica garantisce che il PTFE si espanda e si restringa meno. Tuttavia, la mica ha propriet\u00e0 meccaniche limitate. Questo \u00e8 applicabile principalmente alle tecniche di compressione.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Ekonol\"><\/span>Ekonol<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Ekonol migliora la resistenza del PTFE alle alte temperature, lo rende resistente all&#039;usura e lo rende resistente all&#039;usura del materiale di contatto in acciaio. Questo rende il PTFE adatto per applicazioni rotanti, alimentari e con materiali di contatto morbidi.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Wollastonite\"><\/span>Wollastonite<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>La wollastonite ha propriet\u00e0 simili alla fibra di vetro, ma \u00e8 adatta al contatto con gli alimenti ed \u00e8 anche meno abrasiva.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>Conclusione<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Come potete vedere, le propriet\u00e0 superiori rendono il PTFE la scelta perfetta per numerose applicazioni. Il bello \u00e8 che \u00e8 possibile modificarlo per ottenere propriet\u00e0 superiori adatte a qualsiasi esigenza applicativa.<\/p>\n<p>Per tutte le vostre barre in PTFE, fogli in PTFE o PTFE vergine, contattateci subito.<\/p>\n<p><strong>Ulteriori risorse<\/strong>:<\/p>\n<p><a href=\"https:\/\/www.sciencedirect.com\/topics\/earth-and-planetary-sciences\/polytetrafluoroethylene\">Politetrafluoroetilene<\/a> \u2013 Fonte: Science Direct<\/p>\n<p><a href=\"https:\/\/hansaplas.com\/it\/applicazioni-del-ptfe\/\">Applicazioni PTFE<\/a> \u2013 Fonte: Hansa<\/p>\n<p><a href=\"https:\/\/en.wikipedia.org\/wiki\/Polytetrafluoroethylene\">PTFE<\/a> \u2013 Fonte: Wikipedia<\/p>\n<p><a href=\"https:\/\/hansaplas.com\/it\/ptfe-manufacturing-process\/\">Processo di produzione del PTFE<\/a> \u2013 Fonte: Hansa<\/p>","protected":false},"excerpt":{"rendered":"<p>PTFE is a unique material with fluorine and carbon atoms. Usually, the material is hydrophobic, non-sticky, non-reactive, has a high density, and is resistant to [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":13539,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"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":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"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":""},"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-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":"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":""},"mobile":{"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":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-13509","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>What is the PTFE Properties - The Ultimate Guide - Hansa<\/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:\/\/hansaplas.com\/it\/proprieta-del-ptfe\/\" \/>\n<meta property=\"og:locale\" content=\"it_IT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What is the PTFE Properties - The Ultimate Guide - Hansa\" \/>\n<meta property=\"og:description\" content=\"PTFE is a unique material with fluorine and carbon atoms. 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