{"id":22578,"date":"2024-07-17T08:50:13","date_gmt":"2024-07-17T06:50:13","guid":{"rendered":"https:\/\/www.linseis.com\/high-density-polyethylene-hdpe-an-inside-look\/"},"modified":"2024-09-13T15:56:46","modified_gmt":"2024-09-13T13:56:46","slug":"high-density-polyethylene-hdpe-an-inside-look","status":"publish","type":"post","link":"https:\/\/www.linseis.com\/en\/wiki\/high-density-polyethylene-hdpe-an-inside-look\/","title":{"rendered":"High-density polyethylene (HDPE): An inside look"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"22578\" class=\"elementor elementor-22578 elementor-8451\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-9eb8745 e-flex e-con-boxed e-con e-parent\" data-id=\"9eb8745\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-42b8a1e elementor-toc--minimized-on-tablet elementor-widget elementor-widget-table-of-contents\" data-id=\"42b8a1e\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;headings_by_tags&quot;:[&quot;h2&quot;],&quot;exclude_headings_by_selector&quot;:[],&quot;marker_view&quot;:&quot;numbers&quot;,&quot;no_headings_message&quot;:&quot;No headings were found on this page.&quot;,&quot;minimize_box&quot;:&quot;yes&quot;,&quot;minimized_on&quot;:&quot;tablet&quot;,&quot;hierarchical_view&quot;:&quot;yes&quot;,&quot;min_height&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;min_height_tablet&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;min_height_mobile&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]}}\" data-widget_type=\"table-of-contents.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-toc__header\">\n\t\t\t\t\t\t<h4 class=\"elementor-toc__header-title\">\n\t\t\t\tTable of Contents\t\t\t<\/h4>\n\t\t\t\t\t\t\t\t\t\t<div class=\"elementor-toc__toggle-button elementor-toc__toggle-button--expand\" role=\"button\" tabindex=\"0\" aria-controls=\"elementor-toc__42b8a1e\" aria-expanded=\"true\" aria-label=\"Open table of contents\"><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-down\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M207.029 381.476L12.686 187.132c-9.373-9.373-9.373-24.569 0-33.941l22.667-22.667c9.357-9.357 24.522-9.375 33.901-.04L224 284.505l154.745-154.021c9.379-9.335 24.544-9.317 33.901.04l22.667 22.667c9.373 9.373 9.373 24.569 0 33.941L240.971 381.476c-9.373 9.372-24.569 9.372-33.942 0z\"><\/path><\/svg><\/div>\n\t\t\t\t<div class=\"elementor-toc__toggle-button elementor-toc__toggle-button--collapse\" role=\"button\" tabindex=\"0\" aria-controls=\"elementor-toc__42b8a1e\" aria-expanded=\"true\" aria-label=\"Close table of contents\"><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-up\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M240.971 130.524l194.343 194.343c9.373 9.373 9.373 24.569 0 33.941l-22.667 22.667c-9.357 9.357-24.522 9.375-33.901.04L224 227.495 69.255 381.516c-9.379 9.335-24.544 9.317-33.901-.04l-22.667-22.667c-9.373-9.373-9.373-24.569 0-33.941L207.03 130.525c9.372-9.373 24.568-9.373 33.941-.001z\"><\/path><\/svg><\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<div id=\"elementor-toc__42b8a1e\" class=\"elementor-toc__body\">\n\t\t\t<div class=\"elementor-toc__spinner-container\">\n\t\t\t\t<svg class=\"elementor-toc__spinner eicon-animation-spin e-font-icon-svg e-eicon-loading\" aria-hidden=\"true\" viewBox=\"0 0 1000 1000\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M500 975V858C696 858 858 696 858 500S696 142 500 142 142 304 142 500H25C25 237 238 25 500 25S975 237 975 500 763 975 500 975Z\"><\/path><\/svg>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8a9139e elementor-widget elementor-widget-heading\" data-id=\"8a9139e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">High-density polyethylene (HDPE) vs. polyethylene (PE)<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ffaef65 elementor-widget elementor-widget-text-editor\" data-id=\"ffaef65\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><strong>High-Density<\/strong> <strong>Polyethylene<\/strong> <strong>(HDPE)<\/strong> and <strong>Polyethylene<\/strong> <strong>(PE)<\/strong> are both types of Polyethylene, but they exhibit different properties due to variations in their manufacturing processes.<\/p><p><strong>HDPE<\/strong> is a specific type within the <strong>Polyethylene<\/strong> family, distinguished by its high <a href=\"https:\/\/www.linseis.com\/en\/wiki\/crystallization-and-recrystallization-of-polymers\/\"><strong>crystallinity<\/strong><\/a>, which results from a low proportion of side branching groups on the main polymer chains and the absence of any long side branches.<\/p><p>As a result, <strong>HDPE<\/strong> molecules can arrange themselves in an ordered, pseudo-crystalline structure, imparting unique mechanical properties to the material. On the other hand, <strong>Polyethylene<\/strong> is produced as a class of materials with various densities, and the degree and form of side branching on the polymer chain significantly influence its properties.<\/p><p>The differences in manufacturing lead to different densities and various commercial and scientific designations for <strong>Polyethylene<\/strong>, including <strong>HDPE<\/strong>.<\/p><p>The distinctions between <strong>HDPE<\/strong> and <strong>Polyethylene<\/strong> in terms of their physical properties are summarized in the table below:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-31885ea elementor-widget elementor-widget-spacer\" data-id=\"31885ea\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a4501d7 elementor-widget elementor-widget-spacer\" data-id=\"a4501d7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6586d7e elementor-widget__width-initial elementor-widget elementor-widget-shortcode\" data-id=\"6586d7e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"shortcode.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-shortcode\">\n<table id=\"tablepress-105\" class=\"tablepress tablepress-id-105\">\n<thead>\n<tr class=\"row-1\">\n\t<th class=\"column-1\"><h3><strong>PROPERTIES<\/strong><\/h3><\/th><th class=\"column-2\"><h3><strong>HDPE VALUE (METRIC)<\/strong><\/h3><\/th><th class=\"column-3\"><h3><strong>PE VALUE (METRIC)<\/strong><\/h3><\/th>\n<\/tr>\n<\/thead>\n<tbody class=\"row-striping row-hover\">\n<tr class=\"row-2\">\n\t<td class=\"column-1\">Density:<\/td><td class=\"column-2\">0.933\u20131.27 g\/cm\u00b3<\/td><td class=\"column-3\">0.915\u20130.96 g\/cm\u00b3<\/td>\n<\/tr>\n<tr class=\"row-3\">\n\t<td class=\"column-1\">Shore D Hardness:<\/td><td class=\"column-2\">55\u201369<\/td><td class=\"column-3\">42\u201356<\/td>\n<\/tr>\n<tr class=\"row-4\">\n\t<td class=\"column-1\">Tensile Strength, Ultimate:<\/td><td class=\"column-2\">15.2\u201345 MPa<\/td><td class=\"column-3\">8.96\u201354 MPa<\/td>\n<\/tr>\n<tr class=\"row-5\">\n\t<td class=\"column-1\">Tensile Strength, Yield:<\/td><td class=\"column-2\">2.69\u2013200 MPa<\/td><td class=\"column-3\">7.6\u201314 MPa<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<!-- #tablepress-105 from cache --><\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0ead95c elementor-widget elementor-widget-spacer\" data-id=\"0ead95c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-aeb2266 elementor-widget elementor-widget-spacer\" data-id=\"aeb2266\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c348f39 elementor-widget elementor-widget-text-editor\" data-id=\"c348f39\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>These differences in density, hardness, and tensile strength illustrate the unique mechanical properties of <strong>HDPE<\/strong> compared to other <strong>polyethylene<\/strong> <strong>types<\/strong>.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7a04fb3 elementor-widget__width-initial elementor-widget elementor-widget-image\" data-id=\"7a04fb3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"450\" src=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/HDPE-Rohform-1024x576.png\" class=\"attachment-large size-large wp-image-8462\" alt=\"\" srcset=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/HDPE-Rohform-1024x576.png 1024w, https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/HDPE-Rohform-300x169.png 300w, https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/HDPE-Rohform-768x432.png 768w, https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/HDPE-Rohform.png 1140w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-20567cf elementor-widget elementor-widget-heading\" data-id=\"20567cf\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">The crystallinity of HDPE<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f3a894e elementor-widget elementor-widget-text-editor\" data-id=\"f3a894e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><strong>HDPE<\/strong> is a specific grade within the <strong>Polyethylene<\/strong> family and is characterized by its high <strong>crystallinity<\/strong>. This means that <strong>HDPE<\/strong> molecules are arranged in an ordered, crystalline structure, imparting unique mechanical properties to the material. To precisely quantify the <strong>crystallinity<\/strong>, one can use the special and patented <a href=\"https:\/\/www.linseis.com\/en\/instruments\/differential-scanning-calorimeter-dsc\/chip-dsc-10\/\"><strong>Chip-DSC<\/strong><\/a>.<\/p><p>The high <strong>crystallinity<\/strong> <strong>of<\/strong> <strong>HDPE<\/strong> results in impressive chemical resistance and high tensile strength. These attributes stem from its specific molecular arrangement, providing the material not only with strength but also a degree of stiffness. As a result, <strong>HDPE<\/strong> is in demand for applications such as piping systems, packaging, and boat and canoe construction.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-9a04a49 e-con-full e-flex e-con e-child\" data-id=\"9a04a49\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-1916778 e-con-full e-flex e-con e-child\" data-id=\"1916778\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-eecdecd elementor-widget elementor-widget-image\" data-id=\"eecdecd\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"800\" height=\"450\" src=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/HDPE-Rohre-2-1024x576.png\" class=\"attachment-large size-large wp-image-8479\" alt=\"\" srcset=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/HDPE-Rohre-2-1024x576.png 1024w, https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/HDPE-Rohre-2-300x169.png 300w, https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/HDPE-Rohre-2-768x432.png 768w, https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/HDPE-Rohre-2.png 1140w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-5a8d9e7 e-con-full e-flex e-con e-child\" data-id=\"5a8d9e7\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-6453036 elementor-widget elementor-widget-image\" data-id=\"6453036\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"800\" height=\"450\" src=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/20-1024x576.png\" class=\"attachment-large size-large wp-image-19536\" alt=\"\" srcset=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/20-1024x576.png 1024w, https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/20-300x169.png 300w, https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/20-768x432.png 768w, https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/20.png 1140w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d6438ac elementor-widget elementor-widget-heading\" data-id=\"d6438ac\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">The melting point of high-density polyethylene<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3112811 elementor-widget elementor-widget-text-editor\" data-id=\"3112811\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>A central physical characteristic of <strong>HDPE<\/strong> is its <a href=\"https:\/\/www.linseis.com\/en\/wiki\/melting-point-crystallization-and-glass-transition-in-polymers\/\"><strong>melting<\/strong> <strong>point<\/strong><\/a>, which typically falls in the range of 120\u00b0C to 180\u00b0C.<\/p><p>A common method for determining the <strong>melting<\/strong> <strong>point<\/strong> is the use of a <strong>Dynamic Differential Calorimeter<\/strong>, also known as <strong>DSC<\/strong>.<\/p><p>This makes the material well-suited for various industrial manufacturing methods. A prime example is the extrusion process for producing bottles and containers. During this process, <strong>HDPE<\/strong> is heated to approximately 150\u00b0C to 160\u00b0C, close to its melting point, making it malleable. It is then blown into a mold and cooled, assuming its final shape.<\/p><p>Thanks to this specific temperature range, <strong>HDPE<\/strong> maintains high robustness and tightness during this processing \u2013 properties that are particularly essential for packaging cleaning agents or motor oils.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0bbe709 elementor-widget__width-initial elementor-widget elementor-widget-image\" data-id=\"0bbe709\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"450\" src=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Reinigungsmittel-HDPE-1024x576.png\" class=\"attachment-large size-large wp-image-8492\" alt=\"\" srcset=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Reinigungsmittel-HDPE-1024x576.png 1024w, https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Reinigungsmittel-HDPE-300x169.png 300w, https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Reinigungsmittel-HDPE-768x432.png 768w, https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Reinigungsmittel-HDPE.png 1140w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c076700 elementor-widget elementor-widget-heading\" data-id=\"c076700\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">The robustness and glass transition temperature of HDPE<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-44f3c33 elementor-widget elementor-widget-text-editor\" data-id=\"44f3c33\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>The robustness of <strong>HDPE<\/strong> at high temperatures opens up possibilities for applications where the material is exposed to extreme thermal conditions without losing its structure or functionality.<\/p><p>A prime example is geothermal piping systems. In these systems, hot geothermal heat circulates from the underground, reaching temperatures ranging from 50\u00b0C to 370\u00b0C, depending on depth and region, to heat buildings or generate electricity. <strong>HDPE<\/strong> pipes are present in this environment as they withstand hot liquids without losing their shape or breaking.<\/p><p>This thermal resilience also makes <strong>HDPE<\/strong> the top choice for other applications, such as radiant floor heating systems where warm water flows through the pipes, providing comfortable room temperatures.<\/p><p>The <a href=\"https:\/\/www.linseis.com\/en\/wiki\/glass-transition-temperature\/\"><strong>glass<\/strong> <strong>transition<\/strong> <strong>temperature<\/strong> <strong>(Tg)<\/strong><\/a> <strong>of<\/strong> <strong>High-Density<\/strong> <strong>Polyethylene<\/strong> <strong>(HDPE)<\/strong> typically falls between approximately -100\u00b0C and -130\u00b0C. This low <strong>Tg<\/strong> means that <strong>HDPE<\/strong> remains in a rigid and hard state at temperatures below this range.<\/p><p>The <strong>glass<\/strong> <strong>transition<\/strong> <strong>temperature<\/strong> is the temperature at which an amorphous polymer transitions from a hard, glassy state to a soft, rubbery state, or vice versa.<\/p><p>In the case of <strong>HDPE<\/strong>, this transition occurs at very low temperatures, reflecting its high rigidity and brittleness in the glassy state. The <strong>Chip-DSC<\/strong> can also precisely determine the temperature at which the glass transition occurs.<\/p><p>The <strong>Tg of<\/strong> <strong>HDPE <\/strong>is significantly lower than that of other polymers, making it suitable for applications requiring behavior at low temperatures. Knowledge of the <strong>Tg of HDPE<\/strong> is crucial for applications where mechanical properties and performance at different temperatures play a vital role.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-243805f e-con-full e-flex e-con e-child\" data-id=\"243805f\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-b7d1c46 e-con-full e-flex e-con e-child\" data-id=\"b7d1c46\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-0f72433 elementor-widget elementor-widget-image\" data-id=\"0f72433\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"450\" src=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Fussbodenheizung-mit-HDPE-Rohren-1024x576.png\" class=\"attachment-large size-large wp-image-8513\" alt=\"\" srcset=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Fussbodenheizung-mit-HDPE-Rohren-1024x576.png 1024w, https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Fussbodenheizung-mit-HDPE-Rohren-300x169.png 300w, https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Fussbodenheizung-mit-HDPE-Rohren-768x432.png 768w, https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Fussbodenheizung-mit-HDPE-Rohren.png 1140w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-f8307e8 e-con-full e-flex e-con e-child\" data-id=\"f8307e8\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-9070aec elementor-widget elementor-widget-image\" data-id=\"9070aec\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"450\" src=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/25-1024x576.png\" class=\"attachment-large size-large wp-image-19557\" alt=\"\" srcset=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/25-1024x576.png 1024w, https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/25-300x169.png 300w, https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/25-768x432.png 768w, https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/25.png 1140w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-48f7a73 elementor-widget elementor-widget-heading\" data-id=\"48f7a73\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Different types of HDPE<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b27924d elementor-widget elementor-widget-text-editor\" data-id=\"b27924d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>There are various grades of <strong>HDPE<\/strong>, depending on molecular weight and branching. The numbers following <strong>HDPE<\/strong>, such as \u201c500,\u201d \u201c300,\u201d or \u201c1000,\u201d typically represent the molecular weight in thousands.<\/p>\n<p>This means that <strong>HDPE<\/strong> <strong>500<\/strong> has an average molecular weight of approximately 500,000, <strong>HDPE<\/strong> <strong>300<\/strong> around 300,000, and <strong>HDPE<\/strong> <strong>1000<\/strong> roughly 1,000,000.<\/p>\n<p>A higher molecular weight can result in increased strength, toughness, and chemical resistance, depending on the specific formulation and manufacturing method.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9c625f3 elementor-widget elementor-widget-heading\" data-id=\"9c625f3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Some of the common grades include:<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-abf55a3 e-con-full e-flex e-con e-child\" data-id=\"abf55a3\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-59a465a e-con-full e-flex e-con e-child\" data-id=\"59a465a\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-befb529 elementor-widget elementor-widget-text-editor\" data-id=\"befb529\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ul>\n<li><strong>HDPE 500:<\/strong>\n<ul>\n<li>This type, with a molecular weight around 500,000, is known for its high impact resistance and is commonly used in canoe and boat construction. Due to its resistance to saltwater corrosion and robust nature, boats and canoes made from <strong>HDPE<\/strong> <strong>500<\/strong> are durable and require minimal maintenance.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-20243d8 e-con-full e-flex e-con e-child\" data-id=\"20243d8\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-fa7696c elementor-widget elementor-widget-image\" data-id=\"fa7696c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"450\" src=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/HDPE-im-Kanubau-1024x576.png\" class=\"attachment-large size-large wp-image-8540\" alt=\"\" srcset=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/HDPE-im-Kanubau-1024x576.png 1024w, https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/HDPE-im-Kanubau-300x169.png 300w, https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/HDPE-im-Kanubau-768x432.png 768w, https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/HDPE-im-Kanubau.png 1140w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-67e6c8b e-con-full e-flex e-con e-child\" data-id=\"67e6c8b\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-994cb5d e-con-full e-flex e-con e-child\" data-id=\"994cb5d\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5849594 elementor-widget elementor-widget-image\" data-id=\"5849594\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"450\" src=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/HDPE-in-der-Lebensmittelindustrie-1024x576-1.png\" class=\"attachment-large size-large wp-image-20051\" alt=\"\" srcset=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/HDPE-in-der-Lebensmittelindustrie-1024x576-1.png 1024w, https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/HDPE-in-der-Lebensmittelindustrie-1024x576-1-300x169.png 300w, https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/HDPE-in-der-Lebensmittelindustrie-1024x576-1-768x432.png 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-816bb8c e-con-full e-flex e-con e-child\" data-id=\"816bb8c\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-7ac4db0 elementor-widget elementor-widget-text-editor\" data-id=\"7ac4db0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ul>\n<li><strong>HDPE 300:<\/strong>\n<ul>\n<li>This type, with a molecular weight around 300,000, is commonly used for food packaging. Its resistance to chemicals and low water absorption ensure that food remains fresh and contamination is avoided. Additionally, <strong>HDPE<\/strong> <strong>300<\/strong> is FDA-compliant, meaning it is safe for food contact.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-6401d94 e-con-full e-flex e-con e-child\" data-id=\"6401d94\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-71a6934 e-con-full e-flex e-con e-child\" data-id=\"71a6934\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2ab642b elementor-widget elementor-widget-text-editor\" data-id=\"2ab642b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ul>\n<li><span style=\"text-decoration: underline;\">HDPE 1000:<\/span>\n<ul>\n<li>With a molecular weight around 1,000,000, this type is commonly used in industrial applications due to its high abrasion resistance and resistance to chemical influences. An example is the production of sliding bearings or wear strips in conveyor systems, as these parts are subjected to constant friction.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-e9e1480 e-con-full e-flex e-con e-child\" data-id=\"e9e1480\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-9bfabf1 elementor-widget elementor-widget-image\" data-id=\"9bfabf1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"450\" src=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Verschleissschiene-HDPE-1024x576.png\" class=\"attachment-large size-large wp-image-8558\" alt=\"\" srcset=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Verschleissschiene-HDPE-1024x576.png 1024w, https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Verschleissschiene-HDPE-300x169.png 300w, https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Verschleissschiene-HDPE-768x432.png 768w, https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Verschleissschiene-HDPE.png 1140w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-efecd1d elementor-widget elementor-widget-spacer\" data-id=\"efecd1d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-26b9975 elementor-widget elementor-widget-text-editor\" data-id=\"26b9975\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Depending on the specific requirements of an application, whether it\u2019s resistance to UV radiation, mechanical strength, or suitability for food contact, a particular grade of <strong>HDPE<\/strong> can be selected to achieve the best results. This underscores the versatility and adaptability of <strong>HDPE<\/strong> in various industrial and commercial sectors.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1f7c342 elementor-widget elementor-widget-heading\" data-id=\"1f7c342\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Advantages of using high-density polyethylene<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-93c669b elementor-widget elementor-widget-text-editor\" data-id=\"93c669b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ul>\n<li>Chemical Consistency<\/li>\n<li>Food-safe<\/li>\n<li>UV-Consistency<\/li>\n<li>Humidity resistance<\/li>\n<li>Durability and light weight<\/li>\n<li>Recyclability<\/li>\n<li>Versatility<\/li>\n<\/ul>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-87f6761 elementor-widget elementor-widget-spacer\" data-id=\"87f6761\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>High-density polyethylene (HDPE) and polyethylene (PE) are both types of polyethylene, but they have different properties due to differences in production.<\/p>\n","protected":false},"author":3,"featured_media":13752,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[106],"tags":[],"class_list":["post-22578","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-wiki"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.linseis.com\/en\/wp-json\/wp\/v2\/posts\/22578","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.linseis.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.linseis.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.linseis.com\/en\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.linseis.com\/en\/wp-json\/wp\/v2\/comments?post=22578"}],"version-history":[{"count":0,"href":"https:\/\/www.linseis.com\/en\/wp-json\/wp\/v2\/posts\/22578\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.linseis.com\/en\/wp-json\/wp\/v2\/media\/13752"}],"wp:attachment":[{"href":"https:\/\/www.linseis.com\/en\/wp-json\/wp\/v2\/media?parent=22578"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.linseis.com\/en\/wp-json\/wp\/v2\/categories?post=22578"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.linseis.com\/en\/wp-json\/wp\/v2\/tags?post=22578"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}