{"id":114328,"date":"2024-12-12T17:27:33","date_gmt":"2024-12-12T16:27:33","guid":{"rendered":"https:\/\/step-lab.com\/?page_id=114328"},"modified":"2024-12-12T17:27:35","modified_gmt":"2024-12-12T16:27:35","slug":"iso-2439","status":"publish","type":"page","link":"https:\/\/step-lab.com\/it\/iso-it\/iso-2439\/","title":{"rendered":"ISO 2439"},"content":{"rendered":"\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-188zaf1-025aa8f0fc6b97c81b0d9509fbd8acf9\">\n.avia-section.av-188zaf1-025aa8f0fc6b97c81b0d9509fbd8acf9{\nbackground-repeat:no-repeat;\nbackground-image:url(https:\/\/step-lab.com\/wp-content\/uploads\/2023\/11\/background-for-standards.jpg);\nbackground-position:0% 0%;\nbackground-attachment:scroll;\n}\n.avia-section.av-188zaf1-025aa8f0fc6b97c81b0d9509fbd8acf9 .av-section-color-overlay{\nopacity:0.4;\nbackground-color:#0a0a0a;\n}\n<\/style>\n<div id='av_section_1'  class='avia-section av-188zaf1-025aa8f0fc6b97c81b0d9509fbd8acf9 main_color avia-section-default avia-no-border-styling  avia-builder-el-0  el_before_av_layout_row  avia-builder-el-first  avia-full-stretch avia-bg-style-scroll av-section-color-overlay-active av-minimum-height av-minimum-height-custom av-height-custom  container_wrap fullsize'  data-section-bg-repeat='stretch' data-av_minimum_height_px='400'><div class=\"av-section-color-overlay-wrap\"><div class=\"av-section-color-overlay\"><\/div><div class='container av-section-cont-open' style='height:400px'><main  role=\"main\" itemprop=\"mainContentOfPage\"  class='template-page content  av-content-full alpha units'><div class='post-entry post-entry-type-page post-entry-114328'><div class='entry-content-wrapper clearfix'>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-lp13y1n9-c4766d5d9a214d019a3b8ad78eae5ba3\">\n#top .av_textblock_section.av-lp13y1n9-c4766d5d9a214d019a3b8ad78eae5ba3 .avia_textblock{\ncolor:#ffffff;\n}\n<\/style>\n<section  class='av_textblock_section av-lp13y1n9-c4766d5d9a214d019a3b8ad78eae5ba3 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock av_inherit_color'  itemprop=\"text\" ><h1 style=\"text-align: center;\"><span class=\"ez-toc-section\" id=\"ISO_2439\"><\/span>ISO 2439<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<\/div><\/section>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-mvr8u5-56fde4b1348f244539985c342761cdf4\">\n#top .hr.hr-invisible.av-mvr8u5-56fde4b1348f244539985c342761cdf4{\nheight:20px;\n}\n<\/style>\n<div  class='hr av-mvr8u5-56fde4b1348f244539985c342761cdf4 hr-invisible  avia-builder-el-2  el_after_av_textblock  el_before_av_textblock '><span class='hr-inner '><span class=\"hr-inner-style\"><\/span><\/span><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-lp13ybw2-12fa0d5871d45d46a8b38b70b055a245\">\n#top .av_textblock_section.av-lp13ybw2-12fa0d5871d45d46a8b38b70b055a245 .avia_textblock{\ncolor:#ffffff;\n}\n<\/style>\n<section  class='av_textblock_section av-lp13ybw2-12fa0d5871d45d46a8b38b70b055a245 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock av_inherit_color'  itemprop=\"text\" ><h2 style=\"text-align: center;\"><span class=\"ez-toc-section\" id=\"SCHIUMA_PLASTICA_CELLULARE_FLESSIBILE_%E2%80%93_DETERMINAZIONE_DELLA_DUREZZA\"><\/span>SCHIUMA PLASTICA CELLULARE FLESSIBILE &#8211; DETERMINAZIONE DELLA DUREZZA<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<\/div><\/section>\n\n<\/div><\/div><\/div><!-- close content main div --><\/div><\/div><div id='av-layout-grid-1'  class='av-layout-grid-container av-av_layout_row-575c31e8c6cc3da0551a44f6e7e59d11 entry-content-wrapper main_color av-flex-cells  avia-builder-el-4  el_after_av_section  el_before_av_one_fifth  grid-row-not-first  container_wrap fullsize'  >\n<div class='flex_cell av-av_cell_three_fifth-9049ca77cd381b8eb45853defb5676d4 av-gridrow-cell av_three_fifth no_margin  avia-builder-el-5  el_before_av_cell_two_fifth  avia-builder-el-first '  ><div class='flex_cell_inner'><p><div  class='flex_column av-av_one_fifth-2d22dc0500e159f2b39fe7a147caf14c av_one_fifth  avia-builder-el-6  el_before_av_four_fifth  avia-builder-el-first  first flex_column_div  '     ><\/div><div  class='flex_column av-av_four_fifth-3b0d446bf9e6f7db91541aa567be4cdf av_four_fifth  avia-builder-el-7  el_after_av_one_fifth  avia-builder-el-last  flex_column_div  '     ><style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-lhhg43h5-bab404eb3fc2bd36a4ed6dbb07f0661f\">\n#top .av_textblock_section.av-lhhg43h5-bab404eb3fc2bd36a4ed6dbb07f0661f .avia_textblock{\nfont-size:18px;\n}\n<\/style>\n<section  class='av_textblock_section av-lhhg43h5-bab404eb3fc2bd36a4ed6dbb07f0661f '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p>STEP Lab si impegna a produrre macchine di alta qualit\u00e0 conformi a diversi standard internazionali, come lo standard internazionale per la determinazione della durezza della schiuma di plastica cellulare flessibile (<strong>ISO 2439<\/strong>).<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title ez-toc-toggle\" style=\"cursor:pointer\">PAGE CONTENT<\/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: #a81010;color:#a81010\" 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: #a81010;color:#a81010\" 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-1'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/step-lab.com\/it\/iso-it\/iso-2439\/#ISO_2439\" >ISO 2439<\/a><ul class='ez-toc-list-level-2' ><li class='ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/step-lab.com\/it\/iso-it\/iso-2439\/#SCHIUMA_PLASTICA_CELLULARE_FLESSIBILE_%E2%80%93_DETERMINAZIONE_DELLA_DUREZZA\" >SCHIUMA PLASTICA CELLULARE FLESSIBILE &#8211; DETERMINAZIONE DELLA DUREZZA<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/step-lab.com\/it\/iso-it\/iso-2439\/#CHE_COSE_LA_ISO_2439\" >CHE COS&#8217;\u00c8 LA ISO 2439?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/step-lab.com\/it\/iso-it\/iso-2439\/#ISO_2439_%E2%80%93_METODI_DI_PROVA\" >ISO 2439 &#8211; METODI DI PROVA<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/step-lab.com\/it\/iso-it\/iso-2439\/#TESTING_MACHINES_FOR_ISO_2439\" >TESTING MACHINES FOR ISO 2439<\/a><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n\n<h3><span class=\"ez-toc-section\" id=\"CHE_COSE_LA_ISO_2439\"><\/span>CHE COS&#8217;\u00c8 LA ISO 2439?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>La misurazione della durezza da indentazione nei materiali cellulari flessibili serve a indicare la loro capacit\u00e0 di sopportare carichi. La norma <strong>ISO 2439<\/strong> descrive quattro metodi di prova (da A a D) per la determinazione della durezza all&#8217;indentazione, nonch\u00e9 un metodo (E) per valutare il coefficiente di deflessione a compressione e il tasso di perdita di isteresi di tali materiali. L&#8217;Allegato A fornisce una panoramica concisa dei parametri di prova e dei tipici grafici forza-indentazione ottenuti con questi metodi.<\/p>\n<p>\u00c8 importante notare che questi cinque metodi si applicano specificamente alla schiuma di lattice, alla schiuma di uretano e alla schiuma di PVC a celle aperte. Sono adatti per testare articoli finiti e caratterizzare materiali sfusi.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"ISO_2439_%E2%80%93_METODI_DI_PROVA\"><\/span>ISO 2439 &#8211; METODI DI PROVA<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>La norma <strong>ISO 2439 <\/strong> specifica i seguenti metodi di prova:<\/p>\n<ul>\n<li>Metodo A: Determina l&#8217;indice di durezza all&#8217;indentazione di 40%\/30s, fornendo un&#8217;unica misura per le prove di laboratorio.<\/li>\n<li>Metodo B: determina le caratteristiche di durezza all&#8217;indentazione di 25%-40%-65%\/30s, offrendo indicazioni sulla forma della curva di durezza all&#8217;indentazione.<\/li>\n<li>Metodo C: determina il controllo della durezza per indentazione del 40%, concepito come una procedura rapida adatta ai test di controllo qualit\u00e0.<\/li>\n<li>Metodo D: Determina l&#8217;indice di durezza a bassa indentazione del 25%\/20s, concepito come procedura rapida adatta ai test di ispezione.<\/li>\n<li>Metodo E: determina il coefficiente di deflessione a compressione e il tasso di perdita di isteresi, fornendo ulteriori informazioni sulle propriet\u00e0 portanti dei materiali.<\/li>\n<\/ul>\n<p>Tuttavia, \u00e8 importante riconoscere che i risultati ottenuti con questi metodi si riferiscono esclusivamente alle condizioni di prova specificate e, in generale, non dovrebbero essere utilizzati direttamente per scopi di progettazione.<\/p>\n<\/div><\/section><\/div><\/p>\n<\/div><\/div><div class='flex_cell av-av_cell_two_fifth-9049ca77cd381b8eb45853defb5676d4 av-gridrow-cell av_two_fifth no_margin'  ><div class='flex_cell_inner'><div  class='flex_column av-av_three_fourth-2d22dc0500e159f2b39fe7a147caf14c av_three_fourth first flex_column_div  '     ><style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-ljprl77h-2a0b45db23e6b7ddffd1ddd43c0c131c\">\n@keyframes av_boxShadowEffect_av-ljprl77h-2a0b45db23e6b7ddffd1ddd43c0c131c {\n0%   { 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srcset=\"https:\/\/step-lab.com\/wp-content\/uploads\/2023\/07\/iso2439_foam_testing.jpg 811w, https:\/\/step-lab.com\/wp-content\/uploads\/2023\/07\/iso2439_foam_testing-200x300.jpg 200w, https:\/\/step-lab.com\/wp-content\/uploads\/2023\/07\/iso2439_foam_testing-687x1030.jpg 687w, https:\/\/step-lab.com\/wp-content\/uploads\/2023\/07\/iso2439_foam_testing-768x1152.jpg 768w, https:\/\/step-lab.com\/wp-content\/uploads\/2023\/07\/iso2439_foam_testing-470x705.jpg 470w\" sizes=\"(max-width: 811px) 100vw, 811px\" \/><\/div><\/div><\/div><\/div>\n<\/div><\/div><\/div><div id='after_grid_row_2'  class='main_color av_default_container_wrap container_wrap fullsize'  ><div class='container av-section-cont-open' ><div class='template-page content  av-content-full alpha units'><div class='post-entry post-entry-type-page post-entry-114328'><div class='entry-content-wrapper clearfix'><div  class='flex_column av-8m3ofyq-1b4c212e16f000d91ea0d1a841b2c0db av_one_fifth first flex_column_div  '     ><\/div><div  class='flex_column av-89325pu-039d1c2a2e7a95d10a902b8b06efaec7 av_one_fifth flex_column_div  '     ><style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-7ntj036-fe669fe7d5ab5f46bda5e259c93bc0c0\">\n.avia-image-container.av-7ntj036-fe669fe7d5ab5f46bda5e259c93bc0c0 img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-7ntj036-fe669fe7d5ab5f46bda5e259c93bc0c0 .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-7ntj036-fe669fe7d5ab5f46bda5e259c93bc0c0 av-styling- avia-align-center'   itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><img decoding=\"async\" fetchpriority=\"high\" class='wp-image-95140 avia-img-lazy-loading-not-95140 avia_image ' src=\"https:\/\/step-lab.com\/wp-content\/uploads\/2023\/07\/foam_testing_machine-470x705.jpg\" alt='' title='foam_testing_machine'  height=\"705\" width=\"470\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/step-lab.com\/wp-content\/uploads\/2023\/07\/foam_testing_machine-470x705.jpg 470w, https:\/\/step-lab.com\/wp-content\/uploads\/2023\/07\/foam_testing_machine-200x300.jpg 200w, https:\/\/step-lab.com\/wp-content\/uploads\/2023\/07\/foam_testing_machine-687x1030.jpg 687w, https:\/\/step-lab.com\/wp-content\/uploads\/2023\/07\/foam_testing_machine-768x1152.jpg 768w, https:\/\/step-lab.com\/wp-content\/uploads\/2023\/07\/foam_testing_machine.jpg 997w\" sizes=\"(max-width: 470px) 100vw, 470px\" \/><\/div><\/div><\/div><\/div><\/p>\n<div  class='flex_column av-742w0fm-87b9a329fd1a8df71e41f772c5953174 av_two_fifth flex_column_div  '     ><p>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-6n05yc2-c151233a72e511b80128c819516b0000\">\n#top .hr.hr-invisible.av-6n05yc2-c151233a72e511b80128c819516b0000{\nheight:120px;\n}\n<\/style>\n<div  class='hr av-6n05yc2-c151233a72e511b80128c819516b0000 hr-invisible'><span class='hr-inner '><span class=\"hr-inner-style\"><\/span><\/span><\/div><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-lhhg4moj-16052842af2f6b59284250826eabb65f\">\n#top .av_textblock_section.av-lhhg4moj-16052842af2f6b59284250826eabb65f .avia_textblock{\nfont-size:16px;\n}\n<\/style>\n<section  class='av_textblock_section av-lhhg4moj-16052842af2f6b59284250826eabb65f '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><h3><span class=\"ez-toc-section\" id=\"TESTING_MACHINES_FOR_ISO_2439\"><\/span>TESTING MACHINES FOR ISO 2439<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Our <a href=\"https:\/\/step-lab.com\/systems-based-on-electromechanical-actuators\/\">EA dynamic and fatigue testing machine<\/a> is a versatile solution for conducting tests that comply with ISO 2439.<\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li>Dynamic loads range up to 200kN<\/li>\n<li>Zero maintenance and easy installation<\/li>\n<li>Low energy consuming<\/li>\n<li>Highly reliable test<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/div><\/section><\/p><\/div>\n<\/div><\/div><\/div><!-- close content main div --><\/div><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-61tq91u-5a063aad93f4c398bf7fd2bacec083c0\">\n.avia-section.av-61tq91u-5a063aad93f4c398bf7fd2bacec083c0{\nbackground-color:#dddddd;\nbackground-image:unset;\n}\n<\/style>\n<div id='av_section_4'  class='avia-section av-61tq91u-5a063aad93f4c398bf7fd2bacec083c0 main_color avia-section-default avia-no-border-styling avia-bg-style-scroll container_wrap fullsize'  ><div class='container av-section-cont-open' ><div class='template-page content  av-content-full alpha units'><div class='post-entry post-entry-type-page post-entry-114328'><div class='entry-content-wrapper clearfix'>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-5vq7qb6-0dabef0d20f180dabc983d3eaf1dc7c1\">\n.flex_column.av-5vq7qb6-0dabef0d20f180dabc983d3eaf1dc7c1{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-5vq7qb6-0dabef0d20f180dabc983d3eaf1dc7c1 av_one_fifth first flex_column_div av-zero-column-padding  '     ><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-5ba7oaa-fccb3b9c414c7b0ad2073a1f559d24db\">\n.flex_column.av-5ba7oaa-fccb3b9c414c7b0ad2073a1f559d24db{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-5ba7oaa-fccb3b9c414c7b0ad2073a1f559d24db av_one_fifth flex_column_div av-zero-column-padding  '     ><style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-4pdth0y-919167c568f3888866fb90a74ce3a306\">\n.avia-image-container.av-4pdth0y-919167c568f3888866fb90a74ce3a306 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