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    "slug": "admin-december-14-2016",
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        "rendered": "What is PS Plastic?"
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        "rendered": "<div class=\"vc_row wpb_row vc_row-fluid\"><div class=\"wpb_column vc_column_container vc_col-sm-2\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><\/div><\/div><\/div><div class=\"wpb_column vc_column_container vc_col-sm-8\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><div class=\"vc_empty_space\"   style=\"height: 32px\"><span class=\"vc_empty_space_inner\"><\/span><\/div>\n\t<div class=\"wpb_text_column wpb_content_element  post-type\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<table class=\"aligncenter\" width=\"686\">\n<tbody>\n<tr>\n<td width=\"556\">Polystyrene (PS) plastic is a naturally transparent thermoplastic that is available as both<\/td>\n<td width=\"130\"><\/td>\n<\/tr>\n<tr>\n<td colspan=\"2\" width=\"686\">a typical solid plastic as well in the form of a rigid foam material. PS plastic is commonly used in a variety<\/td>\n<\/tr>\n<tr>\n<td colspan=\"2\" width=\"686\">of consumer product applications and is also particularly useful for commercial packaging. Dow&#8230; Now<\/td>\n<\/tr>\n<tr>\n<td colspan=\"2\" width=\"686\">that we know what it is used for, let\u2019s examine some of the key properties of Polystyrene. Polystyrene is<\/td>\n<\/tr>\n<tr>\n<td colspan=\"2\" width=\"686\">typically (but not always) a homopolymer meaning that it is composed only of the monomer styrene in<\/td>\n<\/tr>\n<tr>\n<td width=\"556\">combination with itself. Depending on the type of PS it could be classified&#8230;<\/td>\n<td width=\"130\"><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\t\t<\/div>\n\t<\/div>\n<\/div><\/div><\/div><div class=\"wpb_column vc_column_container vc_col-sm-2\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><\/div><\/div><\/div><\/div><div class=\"vc_row wpb_row vc_row-fluid\"><div class=\"wpb_column vc_column_container vc_col-sm-12\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\">\n\t<div class=\"wpb_tabs wpb_content_element  post-type tab-style-two\" data-interval=\"0\">\n\t\t<div class=\"wpb_wrapper wpb_tour_tabs_wrapper ui-tabs vc_clearfix\">\n\t\t\t<ul class=\"wpb_tabs_nav ui-tabs-nav vc_clearfix text-big\"><li><a href=\"#tab-1777cee4-108d-3\">What is PS in recycling?<\/a><\/li><li><a href=\"#tab-94e49bb9-fdc5-1\">Why is Polystyrene used so often?<\/a><\/li><li><a href=\"#tab-1647079032500-2-8\">Is PS plastic safe?<\/a><\/li><\/ul>\n\t<div id=\"tab-1777cee4-108d-3\" class=\"wpb_tab ui-tabs-panel wpb_ui-tabs-hide vc_clearfix\">\n\t\t\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p>Styrofoam products are made out of PS plastic, so it&#8217;s commonly used to make disposablecoffee cups, packing peanuts, coolers and to-go food containers. PS products CANSOMETIMES be recycled.<\/p>\n<p><strong>The Eleven Most Important Types of Plastic<\/strong><\/p>\n<p>Polystyrene (PS):&#8230; Plastics are one of the most versatile and widely used materials in the worldHere are the top-eleven most relevant types from water bottles to artificial hips.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p><strong>What are the Characteristics of Polystyrene?<\/strong><\/p>\n<table width=\"707\">\n<tbody>\n<tr>\n<td colspan=\"2\" width=\"707\">Now that we know\u00a0what it is used for, let\u2019s examine some of the key properties of Polystyrene.\u00a0Polystyrene<\/td>\n<\/tr>\n<tr>\n<td colspan=\"2\" width=\"707\">Is typically (but not always) a homopolymer meaning that it is composed only of the monomer styrene in<\/td>\n<\/tr>\n<tr>\n<td width=\"693\">combination with itself. Depending on the type of PS it could be\u00a0classified as a \u201cthermoplastic\u201d or a<\/td>\n<td width=\"15\"><\/td>\n<\/tr>\n<tr>\n<td width=\"693\">\u201cthermoset\u201d\u00a0material. The name has to do with the way the plastic responds to heat. Thermoplastic<\/td>\n<td width=\"15\"><\/td>\n<\/tr>\n<tr>\n<td colspan=\"2\" width=\"707\">materials become fully liquid at their melting point\u00a0(210-249 degrees Celsius in the case of Polystyrene),<\/td>\n<\/tr>\n<tr>\n<td colspan=\"2\" width=\"707\"><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Polystyrene is most uniquely useful for its application as a foamIt is the runaway leader in the packaging industry but it also has a wide range of uses asa traditional plastic. At\u00a0Creative Mechanisms, we have used Polystyrene ina number of applications across a range of industries. For many yearsPolystyrene, or as it is often\u00a0referred to as just Styrene,\u00a0was used as the go-to prototyping material\u00a0basically for the same reasons we now use ABS. It&#8217;s inexpensive, readily availablewhite in color, and it glues, sands, cuts, and paints well. The \u201cS\u201d in\u00a0ABS\u00a0is Styrene.A lot of older engineers and designers who have been in the industryfor a while will ask for a Styrene model when they\u2019re looking for a quick-down-and-dirty prototypeWe still have a lot of sheets of Styrene in the shop at\u00a0Creative Mechanisms.\u00a0We will use them to make quick test models, paint samples,vacuum formed or thermoformed prototypes,<\/p>\n\n\t\t<\/div>\n\t<\/div>\n\n\t<\/div>\n\n\t<div id=\"tab-94e49bb9-fdc5-1\" class=\"wpb_tab ui-tabs-panel wpb_ui-tabs-hide vc_clearfix\">\n\t\t\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p>Polystyrene is most uniquely useful for its application as a foamIt is the runaway leader in the packaging industry but it also has a wide range of uses asa traditional plastic. At\u00a0Creative Mechanisms, we have used Polystyrene ina number of applications across a range of industries. For many yearsPolystyrene, or as it is often\u00a0referred to as just Styrene,\u00a0was used as the go-to prototyping material\u00a0basically for the same reasons we now use ABS. It&#8217;s inexpensive, readily availablewhite in color, and it glues, sands, cuts, and paints well. The \u201cS\u201d in\u00a0ABS\u00a0is Styrene.A lot of older engineers and designers who have been in the industryfor a while will ask for a Styrene model when they\u2019re looking for a quick-down-and-dirty prototypeWe still have a lot of sheets of Styrene in the shop at\u00a0Creative Mechanisms.\u00a0We will use them to make quick test models, paint samples,vacuum formed or thermoformed prototypes, or large models that can be created with flat sheets.We have also seen PS used as a sort-of\u00a0living hinge\u00a0material (typically\u00a0polypropylene\u00a0fits best into\u00a0living hinge\u00a0applications). There are clear disposablePS containers (e.g. a hot dog container from WaWa or your neighborhood convenience store for those living outside the Northeast) that function like aclamshell with a hinge in the middle. The hinge in this case is a little different than your traditional\u00a0PP living hinge. Typically the PS hinge is more of aseries of bends that allow the clamshell to flex and open up. Whether it is technically a living hinge or not, it still works very well and can be easilythermoformed<\/p>\n\n\t\t<\/div>\n\t<\/div>\n\n\t<\/div>\n\n\t<div id=\"tab-1647079032500-2-8\" class=\"wpb_tab ui-tabs-panel wpb_ui-tabs-hide vc_clearfix\">\n\t\t\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p>FDA for decades has determined that polystyrene is safefor use in contact with food. In addition, FDA has approved styrene as a food additive \u2013 it can be added in small amounts to baked goods, frozen dairy products, candy, gelatins,puddings and other food.<\/p>\n<p><strong><u>\u00a0<\/u><\/strong><\/p>\n<p><strong><u>\u00a0<\/u><\/strong><\/p>\n<p><strong>products\u00a0 color<\/strong><\/p>\n<table width=\"97\">\n<tbody>\n<tr>\n<td width=\"97\"><\/td>\n<\/tr>\n<tr>\n<td width=\"97\">\u00b7\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <strong>Black<\/strong><\/td>\n<\/tr>\n<tr>\n<td width=\"97\">\u00b7\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <strong>white <\/strong><\/td>\n<\/tr>\n<tr>\n<td width=\"97\">\u00b7\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <strong>grey <\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>We produce more than 100000 tons per year<\/p>\n<p><strong>What are the properties of PS?<\/strong><\/p>\n<table width=\"505\">\n<tbody>\n<tr>\n<td width=\"253\">Property<\/td>\n<td width=\"65\">Value<\/td>\n<td width=\"57\"><\/td>\n<td width=\"65\"><\/td>\n<td width=\"65\"><\/td>\n<\/tr>\n<tr>\n<td width=\"253\">Technical Name<\/td>\n<td colspan=\"2\" width=\"122\">Polystyrene (PS)<\/td>\n<td width=\"65\"><\/td>\n<td width=\"65\"><\/td>\n<\/tr>\n<tr>\n<td width=\"253\">Chemical Formula<\/td>\n<td width=\"65\">(C8H8)N<\/td>\n<td width=\"57\"><\/td>\n<td width=\"65\"><\/td>\n<td width=\"65\"><\/td>\n<\/tr>\n<tr>\n<td width=\"253\">Melt Temperature<\/td>\n<td colspan=\"3\" width=\"187\">210-249 \u00b0C (410-480 \u00b0F)<\/td>\n<td width=\"65\"><\/td>\n<\/tr>\n<tr>\n<td width=\"253\">Typical Injection Molding Temperature<\/td>\n<td colspan=\"3\" width=\"187\">38 &#8211; 66 \u00b0C (100 &#8211; 150 \u00b0F)<\/td>\n<td width=\"65\"><\/td>\n<\/tr>\n<tr>\n<td width=\"253\">Heat Deflection Temperature (HDT)<\/td>\n<td colspan=\"4\" width=\"252\">95 \u00b0C (284 \u00b0F) at 0.46 MPa (66 PSI)<\/td>\n<\/tr>\n<tr>\n<td width=\"253\">Tensile Strength<\/td>\n<td colspan=\"3\" width=\"187\">53 MPa (7700 PSI)<\/td>\n<td width=\"65\"><\/td>\n<\/tr>\n<tr>\n<td width=\"253\">Flexural Strength<\/td>\n<td colspan=\"3\" width=\"187\">83 MPa (12000 PSI)<\/td>\n<td width=\"65\"><\/td>\n<\/tr>\n<tr>\n<td width=\"253\">Specific Gravity<\/td>\n<td width=\"65\">1.04<\/td>\n<td width=\"57\"><\/td>\n<td width=\"65\"><\/td>\n<td width=\"65\"><\/td>\n<\/tr>\n<tr>\n<td width=\"253\">Shrink Rate<\/td>\n<td colspan=\"4\" width=\"252\">0.3 &#8211; 0.7 % (.003 &#8211; .007 in\/in)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\t\t<\/div>\n\t<\/div>\n\n\t<\/div>\n\n\t\t<\/div>\n\t<\/div>\n<\/div><\/div><\/div><\/div>",
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        "rendered": "<p>Polystyrene (PS) plastic is a naturally transparent thermoplastic that is available as both a typical solid plastic as well in the form of a rigid foam material. PS plastic is commonly used in a variety of consumer product applications and is also particularly useful for commercial packaging. Dow&#8230; Now that we know what it is&hellip;<\/p>",
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