{"id":7498,"date":"2026-10-25T11:12:04","date_gmt":"2026-10-25T11:12:04","guid":{"rendered":"https:\/\/uplastech.com\/how-acrylic-rod-is-made\/"},"modified":"2026-10-26T07:41:55","modified_gmt":"2026-10-26T07:41:55","slug":"how-acrylic-rod-is-made","status":"publish","type":"post","link":"https:\/\/uplastech.com\/nl\/how-acrylic-rod-is-made\/","title":{"rendered":"How Transparent Coloured Acrylic Rod Is Made"},"content":{"rendered":"<style>\n.upl-blog{font-size:17px;line-height:1.78;color:#1f2937}\n.upl-blog p{margin:0 0 18px}\n.upl-blog h2{font-size:26px;line-height:1.3;color:#0b2b33;margin:46px 0 14px;font-weight:700;letter-spacing:-.015em}\n.upl-blog h3{font-size:19.5px;color:#0d3b47;margin:28px 0 10px;font-weight:700}\n.upl-blog ul,.upl-blog ol{margin:0 0 20px;padding-left:22px}\n.upl-blog li{margin:0 0 9px}\n.upl-blog figure{margin:0 0 34px}\n.upl-blog figure img{width:100%;height:auto;display:block;border-radius:10px}\n.upl-blog figcaption{font-size:13px;color:#6b7280;margin-top:10px;line-height:1.5}\n.upl-blog .toc{background:none;border:0;border-radius:0;padding:0;margin:0 0 34px}\n.upl-blog .toc .lwptoc{margin:0}\n.upl-blog .toc h4{margin:0 0 10px;font-size:13px;letter-spacing:.1em;text-transform:uppercase;color:#0d5563}\n.upl-blog .toc ol{margin:0;padding-left:18px;font-size:14.5px}\n.upl-blog .toc li{margin-bottom:6px}\n.upl-blog table{width:100%;border-collapse:collapse;font-size:14.5px;margin:0 0 10px}\n.upl-blog th{background:#0d3b47;color:#fff;text-align:left;padding:11px 13px;font-weight:600;font-size:13.5px;border:0}\n.upl-blog td{padding:11px 13px;border:0;border-bottom:1px solid #e8ebed;vertical-align:top}\n.upl-blog tbody tr:nth-child(even){background:#fafbfc}\n.upl-blog .tablecap{font-size:12.5px;color:#6b7280;margin:0 0 30px}\n.upl-blog .myth{background:#fff8ef;border:1px solid #f6ddbd;border-radius:8px;padding:16px 20px;margin:0 0 26px;font-size:15.5px}\n.upl-blog .myth b{color:#a85c10}\n.upl-blog .callout{background:#f2f8f9;border-radius:8px;padding:18px 22px;margin:0 0 26px;font-size:15.5px;border-left:3px solid #14707f}\n.upl-blog .faq h3{border-top:1px solid #eceff1;padding-top:22px;margin-top:0;font-size:18px}\n.upl-blog .faq h3:first-of-type{border-top:0;padding-top:0}\n.upl-blog .cta{background:linear-gradient(135deg,#0b2b33,#0d5563);color:#fff;border-radius:12px;padding:34px;margin:48px 0 30px}\n.upl-blog .cta h2,.upl-blog .cta .cta-h{color:#fff;margin:0 0 10px;font-size:24px;font-weight:700;line-height:1.3}\n.upl-blog .cta p{color:#c9dee3;margin:0 0 20px;font-size:16px}\n.upl-blog .btn{display:inline-block;background:#e07a1f;color:#fff;text-decoration:none;font-weight:700;padding:13px 26px;border-radius:8px;font-size:15.5px}\n.upl-blog .rel{border-top:1px solid #e8ebed;margin-top:40px;padding-top:26px}\n.upl-blog .rel h4{font-size:13px;letter-spacing:.1em;text-transform:uppercase;color:#6b7280;margin:0 0 14px}\n.upl-blog .rel ul{list-style:none;padding:0;margin:0}\n.upl-blog .rel li{padding:11px 0;border-bottom:1px dashed #e8ebed}\n.upl-blog .rel a{text-decoration:none;font-weight:600;font-size:15.5px}\n@media(max-width:640px){.upl-blog h2{font-size:22px}.upl-blog table{font-size:13px}.upl-blog .cta{padding:24px}}\n\/* \u5355\u7bc7\u9875\u9690\u85cf WhatsApp \u81ea\u52a8\u5c55\u5f00\u7684\u95ee\u5019\u5361\uff0c\u53ea\u4fdd\u7559\u5706\u5f62\u6c14\u6ce1\uff0c\u907f\u514d\u906e\u6321\u4fa7\u680f\u8be2\u76d8\u63d0\u4ea4\u6309\u94ae *\/\nbody.single-post .ht_ctc_chat_greetings_box{display:none !important}\n<\/style>\n<div class=\"upl-blog\">\n<figure>\n<img fetchpriority=\"high\" decoding=\"async\" src=\"https:\/\/uplastech.com\/wp-content\/uploads\/2026\/10\/acrylic-rod-casting-moulds.jpg\" alt=\"Cast acrylic rod production with aluminium tube moulds standing in a heated water bath\" width=\"1536\" height=\"909\"><figcaption>Coloured cast acrylic rod being polymerised in aluminium tube moulds. The temperature ramp in the water bath, not the pigment, is what decides whether the rod comes out clear or full of bubbles.<\/figcaption><\/figure>\n<div class=\"toc\"><\/div>\n<h2 id=\"two-routes\">Two production routes, one product name<\/h2>\n<p>\"Acrylic rod\" covers two manufacturing routes that share a chemistry and almost nothing else. Understanding which route your supplier uses explains most of the differences you will see in tolerance, price and optical quality.<\/p>\n<table>\n<thead>\n<tr>\n<th><\/th>\n<th>Gieten<\/th>\n<th>Extrusie<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>Starting material<\/strong><\/td>\n<td>Liquid MMA monomer<\/td>\n<td>Solid PMMA pellets<\/td>\n<\/tr>\n<tr>\n<td><strong>How the shape is formed<\/strong><\/td>\n<td>Polymerised inside a tube mould<\/td>\n<td>Melted and pushed through a die<\/td>\n<\/tr>\n<tr>\n<td><strong>Batch or continuous<\/strong><\/td>\n<td>Batch \u2014 each tube is a batch<\/td>\n<td>Doorlopend<\/td>\n<\/tr>\n<tr>\n<td><strong>Cyclustijd<\/strong><\/td>\n<td>Many hours to days per batch<\/td>\n<td>Metres per minute<\/td>\n<\/tr>\n<tr>\n<td><strong>Typical diameter<\/strong><\/td>\n<td>3\u2013200 mm<\/td>\n<td>2\u201360 mm<\/td>\n<\/tr>\n<tr>\n<td><strong>Colour added<\/strong><\/td>\n<td>To the monomer before filling<\/td>\n<td>As masterbatch in the pellets<\/td>\n<\/tr>\n<tr>\n<td><strong>Main quality risk<\/strong><\/td>\n<td>Bubbles from exotherm control<\/td>\n<td>Haze from moisture, flow lines<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2 id=\"monomer\">Route one: casting from monomer<\/h2>\n<p>Casting is a chemical process rather than a forming process. The material is created in the shape you want, instead of being shaped after it is made.<\/p>\n<h3>Step 1 \u2014 Preparing the monomer<\/h3>\n<p>Methyl methacrylate monomer is a thin, clear, strongly smelling liquid. It is inhibited as supplied, so the inhibitor has to be removed or overwhelmed before polymerisation will proceed predictably. An initiator is added \u2014 commonly a peroxide or an azo compound such as AIBN \u2014 at a fraction of a percent. The exact level sets how fast the reaction runs, and therefore how much heat it generates.<\/p>\n<p>For transparent coloured rod this is also where the colour goes in: pigment or dye dispersed into the monomer, usually through a concentrated pre-dispersion so that a small volume can be metered accurately into a large batch. Getting this dispersion right is the whole basis of colour consistency, because once the monomer is poured there is no further mixing.<\/p>\n<h3>Step 2 \u2014 Filling the mould<\/h3>\n<p>The mixture is poured into vertical tube moulds. Aluminium is the traditional choice because it conducts heat well and holds its dimensions; polyethylene tubes are used where a softer release is wanted. The tube is filled from the bottom to avoid entraining air, and the fill level is set to allow for the shrinkage that occurs as monomer becomes polymer.<\/p>\n<p>This shrinkage is substantial \u2014 of the order of 20 % by volume \u2014 which is why the mould is generously oversized and why the finished rod's diameter depends on the tube's internal diameter plus a small, predictable correction.<\/p>\n<h3>Step 3 \u2014 Polymerisation<\/h3>\n<p>See the next section. This is the step that decides quality.<\/p>\n<h3>Step 4 \u2014 Demoulding and finishing<\/h3>\n<p>After the cure, the rod is released from the tube, cut to length, and the ends are machined square. Cast rod is usually annealed at this point, then inspected, and the ends are polished if the customer needs optical clarity through the end face.<\/p>\n<h2 id=\"polymerisation\">The polymerisation ramp \u2014 where clarity is won or lost<\/h2>\n<p>Polymerising MMA is exothermic: the reaction releases heat, and heat makes the reaction go faster. In a thin sheet that is easy to control. In a solid rod 50 mm across, the centre cannot get rid of heat as fast as it generates it, so the centre runs hotter than the outside. If the centre reaches the boiling point of residual monomer, you get bubbles. If the centre runs far ahead of the outside, you get a hard core inside a soft shell, and the resulting stress will crack the rod later.<\/p>\n<p>The control is the temperature programme. A typical cycle starts at 40\u201350 \u00b0C, holds while the reaction initiates, then ramps slowly \u2014 over hours \u2014 to a finishing temperature around 90\u2013110 \u00b0C to drive conversion up and complete the polymerisation. Thicker rods need slower ramps and longer holds. Large-diameter cast rod can take a day or more per batch.<\/p>\n<div class=\"callout\">\n<p><strong>This is why cast rod price rises steeply with diameter.<\/strong> A 100 mm rod occupies a mould for far longer than a 20 mm rod, uses more monomer, and carries a much higher risk of a scrapped batch. The material cost difference is small; the occupancy time and the scrap risk are what you are paying for.<\/p>\n<\/div>\n<p>Two further details matter for coloured rod specifically. Pigments can act as nucleating points or absorb heat differently from clear resin, so a colour that cures cleanly in clear may need a modified ramp. And dyes that are sensitive to heat can shift hue during a long, hot cure \u2014 which is one reason a colour matched on a small sample sometimes does not reproduce on a large rod.<\/p>\n<h2 id=\"extrusion\">Route two: extrusion from pellets<\/h2>\n<h3>Step 1 \u2014 Drying<\/h3>\n<p>PMMA pellets absorb moisture from the air. Extruded wet, that moisture turns to steam in the melt and leaves the rod hazy or full of fine bubbles. Drying at roughly 80 \u00b0C for two to four hours in a desiccant dryer is standard, and it is not optional \u2014 it is the single most common cause of hazy extruded acrylic.<\/p>\n<h3>Step 2 \u2014 Melting<\/h3>\n<p>The dried pellets are fed into a single-screw extruder. Acrylic is a difficult melt: high viscosity, strongly shear-thinning, and narrow in its processing window. Barrel temperatures typically run from about 180 \u00b0C at the feed to 220\u2013240 \u00b0C at the die, with the melt itself around 200\u2013230 \u00b0C depending on grade. Overheat it and it degrades; the first sign is a yellow tint that no amount of cooling removes.<\/p>\n<p>Screw design matters more for acrylic than for commodity resins. The screw needs enough compression to melt the pellets without generating so much shear that the melt overheats, and enough mixing to homogenise the masterbatch colour.<\/p>\n<h3>Step 3 \u2014 Forming and sizing<\/h3>\n<p>The melt passes through a circular die, then is cooled and pulled. Two cooling routes are used: a water bath, which gives fast cooling and high output but more residual stress, and air or a cooled sleeve, which gives slower cooling and lower stress. The haul-off speed relative to extruder output sets the drawdown \u2014 the ratio between die size and finished diameter \u2014 and that ratio is what allows extruded rod to hold \u00b10.1 to \u00b10.3 mm.<\/p>\n<p>Because the tolerance depends on a balance between two continuously running machines, extruded tolerance is a process capability rather than a mould dimension. That has a practical implication: if the haul-off drifts or the melt temperature moves, the diameter drifts with it, which is why in-line gauging and closed-loop control matter on a good line.<\/p>\n<h3>Step 4 \u2014 Cutting<\/h3>\n<p>Rod is cut to length on the fly with a saw synchronised to the haul-off. Cut length tolerance of \u00b11 mm is normal; tighter needs a different cut-off arrangement.<\/p>\n<h2 id=\"colour\">Adding the colour<\/h2>\n<figure>\n<img decoding=\"async\" src=\"https:\/\/uplastech.com\/wp-content\/uploads\/2026\/10\/acrylic-rod-colour-range.jpg\" alt=\"Transparent coloured acrylic rods in red, amber, green, blue, violet and clear\" width=\"1536\" height=\"909\"><figcaption>Transparent colour in acrylic comes from soluble dyes or finely dispersed transparent pigments. Any opacifying filler would destroy the effect entirely.<\/figcaption><\/figure>\n<p>Transparent colour is a different problem from opaque colour, and it is worth understanding why before specifying a shade.<\/p>\n<p><strong>No opacifier.<\/strong> Opaque plastics are coloured with titanium dioxide plus pigment. Titanium dioxide scatters light, which is exactly what makes a material opaque \u2014 and exactly what would ruin a transparent rod. So transparent colour is achieved with either a soluble dye, which dissolves in the polymer and absorbs specific wavelengths without scattering, or a transparent organic pigment, which is dispersed as particles small enough not to scatter visible light.<\/p>\n<p><strong>Dye versus pigment.<\/strong> Dyes give the highest clarity and the most \"glass-like\" appearance, because there are no particles at all. Their weakness is lightfastness and heat stability \u2014 some dyes fade or shift in sunlight, and some cannot survive the cast cure or the extrusion melt. Transparent pigments are less optically pure but far more durable, which is why exterior and automotive applications use pigments rather than dyes.<\/p>\n<p><strong>Where the colour is added.<\/strong> In casting, colour is dispersed into the monomer, so it is present uniformly from the first moment of polymerisation and there is no mixing step afterwards. In extrusion, colour comes in as masterbatch pellets blended with natural pellets, and the uniformity depends on how well the screw mixes them. That is the mechanism behind colour streaks in extruded rod \u2014 it is a dispersion problem, not a pigment problem.<\/p>\n<p><strong>Colour changes with diameter.<\/strong> This catches buyers out constantly. A tint that reads as a light amber in a 10 mm rod reads as a deep brown in a 40 mm rod, because the light path through the material is four times longer. Transparent colour therefore has to be specified against a diameter, not on its own. A supplier quoting \"amber\" for both sizes without asking which diameter you need has not thought it through.<\/p>\n<h2 id=\"bubbles\">Why bubbles form, and the four places they come from<\/h2>\n<p>Bubbles are the defining defect of acrylic rod, and they have four distinct origins. Knowing which one you are looking at tells you whether the problem is the process, the material or the handling.<\/p>\n<table>\n<thead>\n<tr>\n<th>Origin<\/th>\n<th>What the bubbles look like<\/th>\n<th>Oorzaak<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>Air entrainment<\/strong><\/td>\n<td>Few, large, irregular, often near the surface or along one side<\/td>\n<td>Air trapped during mould filling in casting, or at the feed throat in extrusion<\/td>\n<\/tr>\n<tr>\n<td><strong>Monomer boil<\/strong><\/td>\n<td>Many, small, concentrated toward the centre of a thick rod<\/td>\n<td>Exotherm running away \u2014 cure too fast or too hot for the diameter<\/td>\n<\/tr>\n<tr>\n<td><strong>Shrinkage voids<\/strong><\/td>\n<td>Elongated, at the centre, often with a \"stringy\" appearance<\/td>\n<td>Material pulling apart as it shrinks while the outside has already hardened<\/td>\n<\/tr>\n<tr>\n<td><strong>Moisture<\/strong><\/td>\n<td>Very fine, evenly distributed, with an overall haze<\/td>\n<td>Wet pellets in extrusion; water or contamination in the monomer in casting<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>The fixes follow directly. Air entrainment: fill from the bottom, slow the fill, check the feed throat temperature. Monomer boil: slower ramp, lower peak temperature, longer hold. Shrinkage voids: this is largely a design limit \u2014 very large solid sections need a slower cure, and beyond a certain diameter cast rod is expected to have a small central void. Moisture: dry the pellets properly, and verify the dryer rather than trusting it.<\/p>\n<h2 id=\"annealing\">Annealing and internal stress<\/h2>\n<p>Both routes leave stress in the rod. Casting leaves the stress of polymerisation and of the temperature gradient across the section. Extrusion leaves the stress of flow orientation and of cooling. In both cases the stress is invisible until something releases it \u2014 usually machining, solvent contact, or time.<\/p>\n<p>Annealing is a controlled release: the rod is heated to just below the point where it would distort, held long enough for the stress to relax, then cooled slowly. For acrylic that is typically in the 80\u2013100 \u00b0C range depending on grade, with hold times that scale with diameter.<\/p>\n<p>The practical test is simple and worth asking for. Immerse a sample in a stress-crazing agent \u2014 a solvent or a proprietary craze test solution \u2014 and see whether it crazes within a specified time. A properly annealed rod survives; an unannealed one crazes in seconds.<\/p>\n<div class=\"callout\">\n<p><strong>If your part will be drilled, tapped, turned or cemented, specify annealed rod.<\/strong> It costs slightly more and it prevents the most common field failure in acrylic components: a crack that appears a day after assembly and is blamed on the material.<\/p>\n<\/div>\n<h2 id=\"qc\">Quality checks at each stage<\/h2>\n<table>\n<thead>\n<tr>\n<th>Stage<\/th>\n<th>What is checked<\/th>\n<th>Waarom<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Incoming material<\/td>\n<td>Monomer inhibitor level, pellet moisture, pigment identity<\/td>\n<td>Wrong initiator level or wet pellets produce a whole batch of scrap<\/td>\n<\/tr>\n<tr>\n<td>Colour preparation<\/td>\n<td>Dispersion quality, shade against standard<\/td>\n<td>Colour cannot be corrected after filling or extrusion<\/td>\n<\/tr>\n<tr>\n<td>In-process<\/td>\n<td>Bath or barrel temperature profile, haul-off speed, drawdown<\/td>\n<td>These are the variables that control bubbles and diameter<\/td>\n<\/tr>\n<tr>\n<td>Finished rod \u2014 dimensional<\/td>\n<td>Diameter at several points, ovality, straightness, length<\/td>\n<td>Confirms the process was stable through the run<\/td>\n<\/tr>\n<tr>\n<td>Finished rod \u2014 optical<\/td>\n<td>Visual inspection against a light box for bubbles, haze, streaks; light transmission on optical grades<\/td>\n<td>Bubbles and haze are the defects that cause rejection<\/td>\n<\/tr>\n<tr>\n<td>Finished rod \u2014 stress<\/td>\n<td>Craze test on a sample<\/td>\n<td>Confirms the annealing cycle worked<\/td>\n<\/tr>\n<tr>\n<td>Finished rod \u2014 colour<\/td>\n<td>Spectrophotometer against the retained standard, \u0394E recorded<\/td>\n<td>Batch-to-batch consistency is the main complaint in coloured rod<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2 id=\"cost\">Why acrylic rod costs what it costs<\/h2>\n<p>Four things drive the price, and only one of them is the material.<\/p>\n<ul>\n<li><strong>Material.<\/strong> PMMA is not a commodity resin. Transparent pigments and lightfast dyes add further cost, and some colours are markedly more expensive than others \u2014 deep reds and blues usually cost more than ambers.<\/li>\n<li><strong>Occupancy time.<\/strong> In casting, the mould is tied up for the whole cure. A large-diameter rod occupies a tube for a day or more, and that time is the dominant cost, not the monomer.<\/li>\n<li><strong>Scrap risk.<\/strong> Casting is a batch process: one temperature excursion can scrap an entire tube, and the scrap cannot be recovered as transparent rod. That risk is priced in.<\/li>\n<li><strong>Yield and finishing.<\/strong> Cutting, squaring the ends, polishing and inspecting all cost labour. A polished end on an optical rod can cost more than the material in a short length.<\/li>\n<\/ul>\n<p>The counter-intuitive consequence: for small diameters in volume, extruded rod is much cheaper; for large diameters, cast is often cheaper than extruded would be, because extrusion cannot make them at all.<\/p>\n<h2 id=\"faq\">Frequently asked questions<\/h2>\n<div class=\"faq\">\n<h3>How long does it take to make cast acrylic rod?<\/h3>\n<p>A full cure cycle for a small-diameter rod is typically measured in hours; for large diameters it can be a day or more per batch, plus annealing. That is why cast rod is made to order rather than held in stock in every size and colour.<\/p>\n<h3>Why is my coloured acrylic rod darker than the sample?<\/h3>\n<p>Almost always a diameter effect. Transparent colour deepens as the light path through the material increases, so a shade approved on a 10 mm sample will look much darker on a 30 mm rod. Colour for transparent rod has to be approved on the actual diameter, or at least on a sample of the same thickness.<\/p>\n<h3>Can acrylic rod be made without bubbles?<\/h3>\n<p>In small and mid diameters, yes \u2014 a well-controlled cast or extrusion process produces rod with no visible bubbles. In very large solid sections a small central void is a normal characteristic of the process rather than a defect, and it should be agreed in the specification rather than discovered at inspection.<\/p>\n<h3>Does the colour go all the way through the rod?<\/h3>\n<p>In both cast and extruded rod, yes \u2014 the colour is in the material, not on the surface. This is different from coated or painted products, and it means the colour survives machining, cutting and polishing.<\/p>\n<h3>What is the difference between transparent and translucent acrylic rod?<\/h3>\n<p>Transparent rod lets you see through it clearly; translucent rod diffuses light so you see a glow but not an image. Translucent is achieved by adding a light-diffusing agent, and it is common in lighting and signage. Specify which one you need \u2014 \"clear coloured\" is ambiguous.<\/p>\n<h3>Can you match a specific Pantone or RAL colour in transparent acrylic?<\/h3>\n<p>Approximately, not exactly. Pantone and RAL are defined for opaque surfaces, and a transparent material viewed against a background will never match a solid colour chip precisely. The practical approach is to match against a physical transparent sample and record the measured value, then hold that as the standard for repeat orders.<\/p>\n<\/div>\n<div class=\"cta\">\n<p class=\"cta-h\">Send the diameter, the colour and the end use<\/p>\n<p>We will confirm whether cast or extruded is the right route, send a colour sample on the actual diameter you need, and quote the quantity \u2014 including the annealing step if your part will be machined.<\/p>\n<p><a class=\"btn\" href=\"https:\/\/uplastech.com\/nl\/service\/\">Request an acrylic rod sample<\/a>\n<\/div>\n<div class=\"rel\">\n<h4>Continue reading<\/h4>\n<ul>\n<li><a href=\"https:\/\/uplastech.com\/nl\/cast-vs-extruded-acrylic-rod\/\">Cast vs Extruded Acrylic Rod: Which One to Specify<\/a><\/li>\n<li><a href=\"https:\/\/uplastech.com\/nl\/acrylic-rod-colour-consistency\/\">Colour Consistency in Transparent Acrylic Rod<\/a><\/li>\n<li><a href=\"https:\/\/uplastech.com\/nl\/acrylic-rod-specification-guide\/\">Acrylic Rod Sizes, Tolerances and Straightness<\/a><\/li>\n<li><a href=\"https:\/\/uplastech.com\/nl\/acrylic-pmma-injection-molding\/\">PMMA acrylic injection moulding at Uplastech<\/a><\/li>\n<\/ul>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Inside acrylic rod production: monomer casting and the polymerisation ramp, extrusion from dried pellets, how transparent colour is added, why bubbles form, and why diameter drives cost.<\/p>","protected":false},"author":1,"featured_media":7493,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_seopress_titles_title":"How Transparent Coloured Acrylic Rod Is Made","_seopress_titles_desc":"How acrylic rod is made: MMA monomer casting, the polymerisation temperature ramp, PMMA extrusion, transparent colouring with dyes and pigments, bubble control and annealing.","_seopress_robots_index":"1","_seopress_robots_follow":"1","_seopress_robots_imageindex":"","_seopress_robots_snippet":"","_seopress_robots_primary_cat":"38","_seopress_robots_breadcrumbs":"","_seopress_robots_freeze_modified_date":"","_seopress_robots_custom_modified_date":"","_seopress_robots_canonical":"https:\/\/uplastech.com\/how-acrylic-rod-is-made\/","_seopress_social_fb_title":"","_seopress_social_fb_desc":"","_seopress_social_fb_img":"","_seopress_social_fb_img_attachment_id":0,"_seopress_social_fb_img_width":0,"_seopress_social_fb_img_height":0,"_seopress_social_twitter_title":"","_seopress_social_twitter_desc":"","_seopress_social_twitter_img":"","_seopress_social_twitter_img_attachment_id":0,"_seopress_social_twitter_img_width":0,"_seopress_social_twitter_img_height":0,"_seopress_redirections_value":"","_seopress_redirections_enabled":"","_seopress_redirections_enabled_regex":"","_seopress_redirections_logged_status":"","_seopress_redirections_param":"","_seopress_redirections_type":0,"_seopress_analysis_target_kw":"how acrylic rod is made","footnotes":""},"categories":[38],"tags":[],"class_list":["post-7498","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-acrylic-rod"],"meta_box":{"post-to-quiz_to":[]},"_links":{"self":[{"href":"https:\/\/uplastech.com\/nl\/wp-json\/wp\/v2\/posts\/7498","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/uplastech.com\/nl\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/uplastech.com\/nl\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/uplastech.com\/nl\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/uplastech.com\/nl\/wp-json\/wp\/v2\/comments?post=7498"}],"version-history":[{"count":1,"href":"https:\/\/uplastech.com\/nl\/wp-json\/wp\/v2\/posts\/7498\/revisions"}],"predecessor-version":[{"id":7549,"href":"https:\/\/uplastech.com\/nl\/wp-json\/wp\/v2\/posts\/7498\/revisions\/7549"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/uplastech.com\/nl\/wp-json\/wp\/v2\/media\/7493"}],"wp:attachment":[{"href":"https:\/\/uplastech.com\/nl\/wp-json\/wp\/v2\/media?parent=7498"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/uplastech.com\/nl\/wp-json\/wp\/v2\/categories?post=7498"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/uplastech.com\/nl\/wp-json\/wp\/v2\/tags?post=7498"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}