{"id":25333,"date":"2026-09-26T13:47:00","date_gmt":"2026-09-26T05:47:00","guid":{"rendered":"https:\/\/www.sanait.com\/?p=25333"},"modified":"2026-09-26T13:47:52","modified_gmt":"2026-09-26T05:47:52","slug":"how-acrylic-is-made","status":"publish","type":"post","link":"https:\/\/www.sanait.com\/es\/how-acrylic-is-made\/","title":{"rendered":"C\u00f3mo se fabrica el acr\u00edlico: de la l\u00e1mina de MMA a las piezas fabricadas"},"content":{"rendered":"\n<style>\n\/* Sanait Guide \u2014 How Acrylic Is Made\n   Scope all rules under .sa-guide so the block does not fight the WP theme. *\/\n.sa-guide {\n  --sa-ink: #1c2430;\n  --sa-muted: #5b6573;\n  --sa-line: #d9dee6;\n  --sa-paper: #f6f4ef;\n  --sa-card: #ffffff;\n  --sa-accent: #1f5f5b;\n  --sa-accent-soft: #e6f1f0;\n  --sa-warn: #8a5a12;\n  --sa-warn-soft: #f7eedf;\n  --sa-max: 760px;\n  color: var(--sa-ink);\n  font-family: Georgia, \"Times New Roman\", Times, serif;\n  font-size: 18px;\n  line-height: 1.65;\n  letter-spacing: 0.01em;\n}\n\n.sa-guide *,\n.sa-guide *::before,\n.sa-guide *::after {\n  box-sizing: border-box;\n}\n\n.sa-guide a {\n  color: var(--sa-accent);\n  text-underline-offset: 3px;\n}\n\n.sa-guide a:hover {\n  text-decoration-thickness: 2px;\n}\n\n.sa-guide .sa-lede,\n.sa-guide p,\n.sa-guide li,\n.sa-guide figcaption,\n.sa-guide td,\n.sa-guide th,\n.sa-guide .sa-note,\n.sa-guide .sa-faq-a {\n  font-family: Georgia, \"Times New Roman\", Times, serif;\n}\n\n.sa-guide .sa-kicker,\n.sa-guide .sa-toc a,\n.sa-guide .sa-meta,\n.sa-guide .sa-chip,\n.sa-guide .sa-table caption,\n.sa-guide .sa-author-role,\n.sa-guide .sa-src-list,\n.sa-guide .sa-faq-q,\n.sa-guide h2,\n.sa-guide h3 {\n  font-family: \"Helvetica Neue\", Helvetica, Arial, sans-serif;\n}\n\n.sa-guide .sa-wrap {\n  max-width: var(--sa-max);\n  margin: 0 auto;\n}\n\n.sa-guide .sa-kicker {\n  display: flex;\n  flex-wrap: wrap;\n  gap: 8px 12px;\n  align-items: center;\n  font-size: 12px;\n  letter-spacing: 0.08em;\n  text-transform: uppercase;\n  color: var(--sa-muted);\n  margin: 0 0 18px;\n}\n\n.sa-guide .sa-chip {\n  background: var(--sa-accent-soft);\n  color: var(--sa-accent);\n  padding: 3px 8px;\n  border-radius: 999px;\n  letter-spacing: 0.06em;\n}\n\n.sa-guide .sa-lede {\n  font-size: 1.18em;\n  line-height: 1.5;\n  margin: 0 0 22px;\n}\n\n.sa-guide .sa-takeaway {\n  background: var(--sa-paper);\n  border: 1px solid var(--sa-line);\n  border-left: 4px solid var(--sa-accent);\n  padding: 18px 20px 16px;\n  margin: 0 0 28px;\n}\n\n.sa-guide .sa-takeaway h2 {\n  margin: 0 0 10px;\n  font-size: 13px;\n  letter-spacing: 0.08em;\n  text-transform: uppercase;\n  color: var(--sa-accent);\n}\n\n.sa-guide .sa-takeaway ul {\n  margin: 0;\n  padding-left: 1.15em;\n}\n\n.sa-guide .sa-takeaway li {\n  margin: 0 0 6px;\n  font-size: 0.95em;\n}\n\n.sa-guide .sa-toc {\n  background: var(--sa-card);\n  border: 1px solid var(--sa-line);\n  padding: 16px 20px 12px;\n  margin: 0 0 32px;\n}\n\n.sa-guide .sa-toc h2 {\n  margin: 0 0 8px;\n  font-size: 13px;\n  letter-spacing: 0.08em;\n  text-transform: uppercase;\n  color: var(--sa-muted);\n}\n\n.sa-guide .sa-toc ol {\n  margin: 0;\n  padding-left: 1.25em;\n}\n\n.sa-guide .sa-toc li {\n  margin: 0 0 4px;\n  font-size: 0.92em;\n  font-family: \"Helvetica Neue\", Helvetica, Arial, sans-serif;\n}\n\n.sa-guide h2 {\n  font-size: 1.35rem;\n  line-height: 1.25;\n  margin: 2.1em 0 0.6em;\n  letter-spacing: -0.01em;\n  scroll-margin-top: 88px;\n}\n\n.sa-guide h3 {\n  font-size: 1.05rem;\n  margin: 1.5em 0 0.45em;\n  scroll-margin-top: 88px;\n}\n\n.sa-guide p {\n  margin: 0 0 1em;\n}\n\n.sa-guide ul,\n.sa-guide ol {\n  margin: 0 0 1.1em;\n  padding-left: 1.2em;\n}\n\n.sa-guide li {\n  margin: 0 0 0.4em;\n}\n\n.sa-guide .sa-def {\n  background: var(--sa-accent-soft);\n  padding: 16px 18px;\n  margin: 0 0 22px;\n  border-radius: 2px;\n}\n\n.sa-guide .sa-def p {\n  margin: 0;\n}\n\n.sa-guide .sa-note {\n  background: var(--sa-warn-soft);\n  border: 1px solid #ead9b8;\n  padding: 14px 16px;\n  margin: 0 0 22px;\n  font-size: 0.95em;\n  color: #4a3a22;\n}\n\n.sa-guide .sa-note strong {\n  color: var(--sa-warn);\n}\n\n.sa-guide .sa-table-wrap {\n  overflow-x: auto;\n  margin: 0 0 22px;\n  border: 1px solid var(--sa-line);\n}\n\n.sa-guide table {\n  width: 100%;\n  border-collapse: collapse;\n  font-size: 0.88em;\n  line-height: 1.4;\n  min-width: 560px;\n}\n\n.sa-guide caption {\n  text-align: left;\n  font-size: 12px;\n  letter-spacing: 0.06em;\n  text-transform: uppercase;\n  color: var(--sa-muted);\n  padding: 10px 12px 8px;\n  background: var(--sa-paper);\n  caption-side: top;\n}\n\n.sa-guide th,\n.sa-guide td {\n  border-top: 1px solid var(--sa-line);\n  padding: 9px 12px;\n  vertical-align: top;\n  text-align: left;\n}\n\n.sa-guide thead th {\n  background: #eef1f4;\n  font-weight: 650;\n  font-family: \"Helvetica Neue\", Helvetica, Arial, sans-serif;\n  font-size: 12px;\n  letter-spacing: 0.03em;\n}\n\n.sa-guide tbody th {\n  font-family: \"Helvetica Neue\", Helvetica, Arial, sans-serif;\n  font-weight: 650;\n  width: 28%;\n}\n\n.sa-guide .sa-grid {\n  display: grid;\n  grid-template-columns: 1fr;\n  gap: 12px;\n  margin: 0 0 22px;\n}\n\n@media (min-width: 700px) {\n  .sa-guide .sa-grid-2 {\n    grid-template-columns: 1fr 1fr;\n  }\n}\n\n.sa-guide .sa-card {\n  border: 1px solid var(--sa-line);\n  padding: 14px 16px 12px;\n  background: var(--sa-card);\n}\n\n.sa-guide .sa-card h3 {\n  margin: 0 0 8px;\n  font-size: 0.95rem;\n}\n\n.sa-guide .sa-card p:last-child,\n.sa-guide .sa-card ul:last-child {\n  margin-bottom: 0;\n}\n\n.sa-guide .sa-faq {\n  border-top: 1px solid var(--sa-line);\n  margin: 0 0 22px;\n}\n\n.sa-guide .sa-faq-item {\n  border-bottom: 1px solid var(--sa-line);\n  padding: 14px 0 12px;\n}\n\n.sa-guide .sa-faq-q {\n  margin: 0 0 6px;\n  font-size: 1rem;\n  font-weight: 650;\n}\n\n.sa-guide .sa-faq-a {\n  margin: 0;\n}\n\n.sa-guide .sa-author {\n  display: grid;\n  grid-template-columns: 1fr;\n  gap: 8px;\n  background: var(--sa-paper);\n  border: 1px solid var(--sa-line);\n  padding: 18px 20px;\n  margin: 28px 0 22px;\n}\n\n.sa-guide .sa-author h2 {\n  margin: 0;\n  font-size: 13px;\n  letter-spacing: 0.08em;\n  text-transform: uppercase;\n  color: var(--sa-muted);\n}\n\n.sa-guide .sa-author-name {\n  font-weight: 700;\n  font-family: \"Helvetica Neue\", Helvetica, Arial, sans-serif;\n  margin: 0;\n}\n\n.sa-guide .sa-author-role {\n  margin: 0;\n  color: var(--sa-muted);\n  font-size: 0.88em;\n}\n\n.sa-guide .sa-src h2 {\n  margin-top: 1.6em;\n}\n\n.sa-guide .sa-src-list {\n  font-size: 0.88em;\n  color: var(--sa-muted);\n}\n\n.sa-guide .sa-src-list li {\n  margin: 0 0 8px;\n}\n\n.sa-guide .sa-related {\n  margin: 0 0 8px;\n}\n\n.sa-guide .sa-related ul {\n  margin-bottom: 0;\n}\n\n.sa-guide .sa-meta {\n  font-size: 13px;\n  color: var(--sa-muted);\n  margin: 0 0 18px;\n}\n\n<\/style>\n<div class=\"sa-guide\">\n  <div class=\"sa-wrap\">\n\n    <p class=\"sa-kicker\">\n      <span class=\"sa-chip\">Cluster 3 \u00b7 How It\u2019s Made<\/span>\n      <span>Guide \u00b7 Process<\/span>\n    <\/p>\n\n    <p class=\"sa-meta\">By David Deng \u00b7 R&amp;D manager, Sanait \u00b7 Updated September 2026<\/p>\n\n    <p class=\"sa-lede\">\u201cHow acrylic is made\u201d is two different processes stacked on top of each other. First, methyl methacrylate is polymerized into PMMA sheet, rod, tube, or pellets. Second, that stock is cut, formed, bonded, polished, and printed into a part. Buyers who mix the two steps end up specifying a fabrication method as if it were a material grade \u2014 or a mill process as if it were a box design.<\/p>\n\n    <aside class=\"sa-takeaway\" aria-label=\"Key takeaways\">\n      <h2>Key takeaways<\/h2>\n      <ul>\n        <li>Sheet manufacture and part fabrication are separate. Cast versus extruded is decided at the mill. Laser cutting versus CNC is decided at the factory.<\/li>\n        <li>Cell-cast sheet is polymerized in a mold, often between glass plates. Extruded sheet is melted PMMA pushed through a die. Continuous-cast sits between those two industrial routes.<\/li>\n        <li>Most retail fixtures are made from sheet by a short chain: cut \u2192 machine or form \u2192 join \u2192 finish \u2192 print \u2192 inspect.<\/li>\n        <li>Edge quality, joint clarity, and residual stress come from process choice and from annealing \u2014 not from a brand name on the film.<\/li>\n        <li>A useful factory RFQ names the stock route, the cut method, the joint method, and the finish. \u201cMake it acrylic\u201d is not a process spec.<\/li>\n      <\/ul>\n    <\/aside>\n\n    <nav class=\"sa-toc\" aria-label=\"On this page\">\n      <h2>On this page<\/h2>\n      <ol>\n        <li><a href=\"#two-layers\">Two layers of \u201cmade\u201d<\/a><\/li>\n        <li><a href=\"#from-monomer\">From MMA to PMMA<\/a><\/li>\n        <li><a href=\"#sheet-routes\">How sheet is made<\/a><\/li>\n        <li><a href=\"#other-stock\">Rod, tube, block, and pellets<\/a><\/li>\n        <li><a href=\"#fabrication\">How parts are fabricated<\/a><\/li>\n        <li><a href=\"#cut\">Cutting: saw, laser, CNC<\/a><\/li>\n        <li><a href=\"#form\">Forming and bending<\/a><\/li>\n        <li><a href=\"#join\">Joining and bonding<\/a><\/li>\n        <li><a href=\"#finish\">Polishing, print, and hardware<\/a><\/li>\n        <li><a href=\"#stress\">Stress, annealing, and common defects<\/a><\/li>\n        <li><a href=\"#choose-process\">Which process for which part<\/a><\/li>\n        <li><a href=\"#faq\">FAQ<\/a><\/li>\n        <li><a href=\"#sources\">Sources<\/a><\/li>\n      <\/ol>\n    <\/nav>\n\n    <h2 id=\"two-layers\">Two layers of \u201cmade\u201d<\/h2>\n\n    <div class=\"sa-def\">\n      <p><strong>Definition.<\/strong> Acrylic manufacture is the conversion of methyl methacrylate (MMA) into poly(methyl methacrylate) (PMMA) stock. Acrylic fabrication is the conversion of that stock into a finished article. ISO 7823 describes sheet types. It does not describe how a perfume stand is assembled.<\/p>\n    <\/div>\n\n    <p>What is acrylic, and how to choose a grade, are covered in the earlier guides: <a href=\"https:\/\/www.sanait.com\/what-is-acrylic\/\">What is acrylic?<\/a> and <a href=\"https:\/\/www.sanait.com\/how-to-choose-acrylic\/\">How to choose acrylic<\/a>. This article stays on process.<\/p>\n\n    <h2 id=\"from-monomer\">From MMA to PMMA<\/h2>\n\n    <p>MMA is a liquid monomer. With an initiator and controlled heat, it polymerizes into long PMMA chains. Additives \u2014 UV stabilizers, colorants, impact modifiers, release agents \u2014 are introduced at this stage or during later compounding. The same monomer family can become optical sheet, a molding pellet, a coating, or a casting syrup. The downstream process decides the molecular weight and the residual stress, which is why cast sheet and extruded sheet do not machine the same way.<\/p>\n\n    <p>Commercial sheet is usually based on MMA homopolymer or on copolymers that still behave as PMMA for general-purpose use. Specialty grades (impact-modified, flame-modified, abrasion-coated) are not interchangeable with unmodified sheet in a fabrication recipe.<\/p>\n\n    <h2 id=\"sheet-routes\">How sheet is made<\/h2>\n\n    <p>Three industrial routes dominate flat sheet. All three can be colorless, tinted, translucent, or opaque. They are not equal stock for a display factory.<\/p>\n\n    <div class=\"sa-table-wrap\">\n      <table>\n        <caption>Mill routes for PMMA sheet<\/caption>\n        <thead>\n          <tr>\n            <th scope=\"col\">Route<\/th>\n            <th scope=\"col\">What happens<\/th>\n            <th scope=\"col\">Typical consequence in fabrication<\/th>\n          <\/tr>\n        <\/thead>\n        <tbody>\n          <tr>\n            <th scope=\"row\">Cell cast<\/th>\n            <td>A syrup of MMA (and often some polymer) is poured into a cell, commonly two glass plates with a gasket, and polymerized by heat.<\/td>\n            <td>Higher molecular weight, lower directional stress, wider thickness tolerance, better polishing and solvent joints on many parts.<\/td>\n          <\/tr>\n          <tr>\n            <th scope=\"row\">Continuous cast<\/th>\n            <td>Polymerization and sheet formation run as a continuous belt or similar process rather than a batch cell. Covered for general-purpose sheet in ISO 7823-3.<\/td>\n            <td>Cast-like optics and machining in thinner gauges, with industrial length availability.<\/td>\n          <\/tr>\n          <tr>\n            <th scope=\"row\">Extruded<\/th>\n            <td>PMMA pellets are melted, forced through a die, and calendered. Covered in ISO 7823-2.<\/td>\n            <td>Tighter thickness, lower cost in standard gauges, more orientation, softer cutting behavior, more sensitive to solvents on stressed parts.<\/td>\n          <\/tr>\n        <\/tbody>\n      <\/table>\n    <\/div>\n\n    <p>Protective film is applied after the sheet is made. Film grade and how long it stays on during laser work change edge soot and glue residue. That is a shop detail, not a mill chemistry detail, but it shows up as a \u201cquality\u201d complaint.<\/p>\n\n    <h2 id=\"other-stock\">Rod, tube, block, and pellets<\/h2>\n\n    <ul>\n      <li><strong>Cast block and thick plate<\/strong> come from the same family of bulk polymerization. They are the stock for milled pedestals and solid letters.<\/li>\n      <li><strong>Rod and tube<\/strong> may be cast (including rotational methods for tube) or extruded. Confirm the route if the part will be machined or solvent-welded.<\/li>\n      <li><strong>Pellets<\/strong> feed injection molding and profile extrusion. A molding-grade data sheet (classification systems such as ASTM D788) does not describe sheet fabrication.<\/li>\n    <\/ul>\n\n    <h2 id=\"fabrication\">How parts are fabricated<\/h2>\n\n    <p>A typical custom display or box follows this order. Steps can be skipped; they are rarely reordered without a reason.<\/p>\n\n    <ol>\n      <li>Stock selection and film-on inspection.<\/li>\n      <li>Cutting to blank size.<\/li>\n      <li>Machining features (pockets, slots, holes) or forming (heat bend, drape, vacuum).<\/li>\n      <li>Joining (solvent cement, UV adhesive, mechanical hardware).<\/li>\n      <li>Edge and surface finishing.<\/li>\n      <li>Print, engraving, or paint.<\/li>\n      <li>Hardware, magnets, feet, and lining.<\/li>\n      <li>Clean, inspect, pack with film or foam that will not mark the face.<\/li>\n    <\/ol>\n\n    <p>Sanait\u2019s shop-level walkthrough of display builds is <a href=\"https:\/\/www.sanait.com\/analyzing-the-manufacturing-process-of-acrylic-display-products\/\">Analyzing the manufacturing process of acrylic display products<\/a>. The sections below stay general so they can be cited without treating one factory as the definition of the process.<\/p>\n\n    <h2 id=\"cut\">Cutting: saw, laser, CNC<\/h2>\n\n    <div class=\"sa-table-wrap\">\n      <table>\n        <caption>Common cutting methods for PMMA sheet<\/caption>\n        <thead>\n          <tr>\n            <th scope=\"col\">Method<\/th>\n            <th scope=\"col\">What it does well<\/th>\n            <th scope=\"col\">What it does poorly<\/th>\n          <\/tr>\n        <\/thead>\n        <tbody>\n          <tr>\n            <th scope=\"row\">Circular or panel saw<\/th>\n            <td>Straight blanks, thick plate, low setup.<\/td>\n            <td>Inside corners, fine graphics. Cut edges need secondary finish if they will be seen.<\/td>\n          <\/tr>\n          <tr>\n            <th scope=\"row\">CO<sub>2<\/sub> laser<\/th>\n            <td>Complex outlines, small holes, a heat-polished edge on suitable cast sheet.<\/td>\n            <td>Very thick plate, tight stacked tolerances, and some extruded grades that melt or stress-craze at the kerf.<\/td>\n          <\/tr>\n          <tr>\n            <th scope=\"row\">CNC router<\/th>\n            <td>Pockets, rebates, precise holes, 3D edges, thick stock.<\/td>\n            <td>Hairline internal corners unless a radius is allowed. Tool marks need polish if the edge is cosmetic.<\/td>\n          <\/tr>\n        <\/tbody>\n      <\/table>\n    <\/div>\n\n    <p>Laser-cut edges on quality cast sheet often look \u201cfinished.\u201d That look is a thin melt layer. It can hide stress. If the part will be solvent-bonded or used outdoors, some shops anneal after laser work. Router-cut edges are mechanically cleaner but visually dull until they are polished.<\/p>\n\n    <h2 id=\"form\">Forming and bending<\/h2>\n\n    <p>PMMA is a thermoplastic. Above its glass-transition region it softens and can be bent or draped. General-purpose sheet is commonly formed well below any \u201cmelting point\u201d quoted on a casual blog \u2014 shops use producer forming windows, not a single public number copied across grades.<\/p>\n\n    <ul>\n      <li><strong>Strip heat bending<\/strong> is the usual method for brochure lips, tray walls, and simple returns. Extruded sheet often forms at a lower temperature and with less force.<\/li>\n      <li><strong>Drape and vacuum forming<\/strong> need even heat and a mold that will not mark the optical face.<\/li>\n      <li><strong>Cold bending<\/strong> is limited. Tight cold bends store stress and crack later, especially on extruded sheet and around holes.<\/li>\n    <\/ul>\n\n    <p>Formed parts should cool on the fixture. Pulling a hot bend off the jig early is a common source of spring-back and later cracking at the bend line.<\/p>\n\n    <h2 id=\"join\">Joining and bonding<\/h2>\n\n    <p>Clear joints are why acrylic boxes look like one piece. They are also where chemistry and stress meet.<\/p>\n\n    <ul>\n      <li><strong>Solvent cement<\/strong> (often dichloromethane-based systems used on PMMA) softens the faying surfaces so they weld. Cast sheet generally tolerates this better. Tight clamps, trapped solvent, and residual laser stress cause blushing and crazing.<\/li>\n      <li><strong>UV-curing adhesives<\/strong> fill small gaps and are common on display work. They are not automatically food-contact or outdoor-rated. The adhesive data sheet is a separate spec from the sheet.<\/li>\n      <li><strong>Mechanical joints<\/strong> \u2014 screws, standoffs, magnets, hinges \u2014 avoid solvent risk but introduce notches. Hole size, clearance, and washer design matter more than screw appearance.<\/li>\n    <\/ul>\n\n    <div class=\"sa-note\">\n      <strong>Do not treat glue as invisible structure.<\/strong> A solvent joint is strong in shear on a well-fitted edge. It is a poor substitute for thickness on a long, loaded lid. Design the span first; then choose a joint.\n    <\/div>\n\n    <h2 id=\"finish\">Polishing, print, and hardware<\/h2>\n\n    <div class=\"sa-grid sa-grid-2\">\n      <div class=\"sa-card\">\n        <h3>Edges<\/h3>\n        <p>Saw and router edges are dressed by scraping, sanding through finer grits, flame polishing, or diamond polishing. Flame polish is fast and glossy; it can add a stress skin. Diamond polish is slower and more stable on visible luxury edges.<\/p>\n      <\/div>\n      <div class=\"sa-card\">\n        <h3>Faces<\/h3>\n        <p>Optical faces should stay under film until packing. Light haze is often film adhesive or dry wiping, not \u201cbad sheet.\u201d Deep scratches are removed only by polishing that also removes thickness \u2014 a problem on tight fits.<\/p>\n      <\/div>\n      <div class=\"sa-card\">\n        <h3>Graphics<\/h3>\n        <p>Laser engraving, UV printing, screen printing, and vinyl are different stacks. Engraving on cast sheet usually frosts cleanly. Inks and adhesives must be checked against alcohol wipes if the part is a cosmetics fixture.<\/p>\n      <\/div>\n      <div class=\"sa-card\">\n        <h3>Hardware<\/h3>\n        <p>Magnets, locks, and rubber feet are added last so solvent and heat do not sit against them. On food-contact parts, hardware and adhesives are part of the compliance file, not decorations.<\/p>\n      <\/div>\n    <\/div>\n\n    <h2 id=\"stress\">Stress, annealing, and common defects<\/h2>\n\n    <p>Many field failures blamed on \u201ccheap acrylic\u201d are process stress: laser heat, tight screws, solvent in a clamped joint, a bend cooled too fast, or a sheet stored on edge in the sun. Annealing \u2014 a controlled heat cycle below the forming window, followed by slow cooling \u2014 is used to relax residual stress before bonding or after heavy machining. It is not a cosmetic polish, and it is not required on every simple saw-cut blank.<\/p>\n\n    <div class=\"sa-table-wrap\">\n      <table>\n        <caption>Defects that trace to process, not to \u201cacrylic\u201d as a word<\/caption>\n        <thead>\n          <tr>\n            <th scope=\"col\">What you see<\/th>\n            <th scope=\"col\">Often caused by<\/th>\n          <\/tr>\n        <\/thead>\n        <tbody>\n          <tr>\n            <th scope=\"row\">Fine cracks at a hole or bend<\/th>\n            <td>Notch plus residual stress; screw without clearance; cold bend<\/td>\n          <\/tr>\n          <tr>\n            <th scope=\"row\">White blush in a joint<\/th>\n            <td>Moisture, trapped solvent, or poorly fitted edges<\/td>\n          <\/tr>\n          <tr>\n            <th scope=\"row\">Orange-peel or ripple on a face<\/th>\n            <td>Overheat during forming or flame work<\/td>\n          <\/tr>\n          <tr>\n            <th scope=\"row\">Yellow or hazy sheet after months outdoors<\/th>\n            <td>Indoor grade, mixed\/recycled stock, or a failing coating \u2014 confirm the mill grade<\/td>\n          <\/tr>\n          <tr>\n            <th scope=\"row\">Warped panel<\/th>\n            <td>Uneven storage, one-sided heat, or a formed part pulled off the jig early. See also <a href=\"https:\/\/www.sanait.com\/fixing-warping-issues-with-acrylic-sheets\/\">warping notes<\/a>.<\/td>\n          <\/tr>\n        <\/tbody>\n      <\/table>\n    <\/div>\n\n    <h2 id=\"choose-process\">Which process for which part<\/h2>\n\n    <div class=\"sa-table-wrap\">\n      <table>\n        <caption>First-pass process map<\/caption>\n        <thead>\n          <tr>\n            <th scope=\"col\">Part<\/th>\n            <th scope=\"col\">Stock<\/th>\n            <th scope=\"col\">Usual process chain<\/th>\n          <\/tr>\n        <\/thead>\n        <tbody>\n          <tr>\n            <th scope=\"row\">Clear five-sided box<\/th>\n            <td>Cast sheet<\/td>\n            <td>Laser or CNC blanks \u2192 solvent or UV joints \u2192 diamond or flame edge \u2192 inspect optics<\/td>\n          <\/tr>\n          <tr>\n            <th scope=\"row\">Brochure holder with a lip<\/th>\n            <td>Extruded or cast, by volume<\/td>\n            <td>Cut \u2192 strip heat bend \u2192 polish front edges \u2192 print<\/td>\n          <\/tr>\n          <tr>\n            <th scope=\"row\">Jewelry \/ perfume stand<\/th>\n            <td>Cast sheet or block<\/td>\n            <td>CNC pockets \u2192 polish \u2192 optional engraving<\/td>\n          <\/tr>\n          <tr>\n            <th scope=\"row\">Outdoor sign face<\/th>\n            <td>UV-stable sheet<\/td>\n            <td>Cut oversized holes or frame the panel \u2192 avoid tight mechanical clamp<\/td>\n          <\/tr>\n          <tr>\n            <th scope=\"row\">Solid pedestal<\/th>\n            <td>Cast block<\/td>\n            <td>Mill \u2192 sand\/polish \u2192 no solvent \u201cshortcut\u201d for missing mass<\/td>\n          <\/tr>\n        <\/tbody>\n      <\/table>\n    <\/div>\n\n    <p>If you are sending work to a factory, name stock route, cut method, joint method, and finish on the RFQ. Commercial terms for Sanait jobs (MOQ, sampling) sit on the <a href=\"https:\/\/www.sanait.com\/faq\/\">FAQ<\/a>; they are not process physics.<\/p>\n\n    <h2 id=\"faq\">FAQ<\/h2>\n\n    <div class=\"sa-faq\">\n      <div class=\"sa-faq-item\">\n        <h3 class=\"sa-faq-q\">Is laser-cut acrylic the same as manufactured acrylic?<\/h3>\n        <p class=\"sa-faq-a\">No. Laser cutting is a fabrication step performed on sheet that was already cast or extruded at a mill. The laser does not make PMMA.<\/p>\n      <\/div>\n      <div class=\"sa-faq-item\">\n        <h3 class=\"sa-faq-q\">Why do factories prefer cast sheet for boxes?<\/h3>\n        <p class=\"sa-faq-a\">Because the edges polish more predictably and solvent joints are less likely to craze. Extruded sheet can still make a box; the process window is narrower.<\/p>\n      <\/div>\n      <div class=\"sa-faq-item\">\n        <h3 class=\"sa-faq-q\">Does a flame-polished edge need more work?<\/h3>\n        <p class=\"sa-faq-a\">Sometimes. Flame polish is a heat skin. For parts that will be cemented, used outdoors, or loaded at the edge, a mechanical polish plus optional annealing is the more conservative sequence.<\/p>\n      <\/div>\n      <div class=\"sa-faq-item\">\n        <h3 class=\"sa-faq-q\">Can acrylic be injection molded?<\/h3>\n        <p class=\"sa-faq-a\">Yes, from PMMA pellets. That is a different industry from sheet fabrication. Molded lenses and light pipes should be specified as molding compounds, not as \u201c3 mm cast.\u201d<\/p>\n      <\/div>\n      <div class=\"sa-faq-item\">\n        <h3 class=\"sa-faq-q\">Is recycled sheet processed the same way?<\/h3>\n        <p class=\"sa-faq-a\">It can be cut on the same machines. Optical consistency, stress, and outdoor color hold are less predictable. For clear export fixtures, virgin mill sheet is the lower-risk default.<\/p>\n      <\/div>\n      <div class=\"sa-faq-item\">\n        <h3 class=\"sa-faq-q\">What should I ask a factory before production?<\/h3>\n        <p class=\"sa-faq-a\">Stock route and mill, cut method, whether laser parts are annealed, joint chemistry, edge finish, and how the first article will be inspected against your drawing.<\/p>\n      <\/div>\n    <\/div>\n\n    <div class=\"sa-author\" id=\"author\">\n      <h2>About the author<\/h2>\n      <p class=\"sa-author-name\">David Deng<\/p>\n      <p class=\"sa-author-role\">R&amp;D manager at Sanait. 10+ years in acrylic fabrication; 2,000+ custom acrylic projects shipped across 20+ countries.<\/p>\n      <p>Sanait Co., Ltd. fabricates custom acrylic displays, boxes, trays, and organizers in Dongguan. The process map above is general PMMA practice. Plant capability and commercial terms are on the <a href=\"https:\/\/www.sanait.com\/about-us\/\">about page<\/a>.<\/p>\n    <\/div>\n\n    <div class=\"sa-related\">\n      <h2>Related Sanait guides<\/h2>\n      <ul>\n        <li><a href=\"https:\/\/www.sanait.com\/what-is-acrylic\/\">What is acrylic?<\/a><\/li>\n        <li><a href=\"https:\/\/www.sanait.com\/how-to-choose-acrylic\/\">How to choose acrylic<\/a><\/li>\n        <li><a href=\"https:\/\/www.sanait.com\/analyzing-the-manufacturing-process-of-acrylic-display-products\/\">Manufacturing process of acrylic display products<\/a><\/li>\n        <li><a href=\"https:\/\/www.sanait.com\/acrylic-manufacturing-how-to-choose-high-quality-raw-materials\/\">How to choose raw materials<\/a><\/li>\n        <li><a href=\"https:\/\/www.sanait.com\/fixing-warping-issues-with-acrylic-sheets\/\">Fixing warping issues with acrylic sheets<\/a><\/li>\n      <\/ul>\n    <\/div>\n\n    <section class=\"sa-src\" id=\"sources\">\n      <h2>Sources<\/h2>\n      <ol class=\"sa-src-list\">\n        <li>ISO 7823-1:2003, <em>Plastics \u2014 Poly(methyl methacrylate) sheets \u2014 Part 1: Cast sheets<\/em>. <a href=\"https:\/\/www.iso.org\/standard\/33450.html\" rel=\"nofollow noopener\" target=\"_blank\">iso.org<\/a><\/li>\n        <li>ISO 7823-2:2003, <em>Plastics \u2014 Poly(methyl methacrylate) sheets \u2014 Part 2: Extruded sheets<\/em>. <a href=\"https:\/\/www.iso.org\/standard\/33451.html\" rel=\"nofollow noopener\" target=\"_blank\">iso.org<\/a><\/li>\n        <li>ISO 7823-3:2021, <em>Plastics \u2014 Poly(methyl methacrylate) sheets \u2014 Part 3: Continuous cast sheets<\/em>. <a href=\"https:\/\/www.iso.org\/standard\/82324.html\" rel=\"nofollow noopener\" target=\"_blank\">iso.org<\/a><\/li>\n        <li>ASTM D788, <em>Standard Classification System for Poly(Methyl Methacrylate) (PMMA) Molding and Extrusion Materials<\/em>. <a href=\"https:\/\/www.astm.org\/d0788-16.html\" rel=\"nofollow noopener\" target=\"_blank\">astm.org<\/a><\/li>\n        <li>\u201cPoly(methyl methacrylate).\u201d <em>Wikipedia<\/em>. <a href=\"https:\/\/en.wikipedia.org\/wiki\/Poly(methyl_methacrylate)\" rel=\"nofollow noopener\" target=\"_blank\">en.wikipedia.org<\/a><\/li>\n        <li>Osswald, T. \u201cTracing the History of Polymeric Materials: The Commercialization of Acrylic.\u201d <em>Plastics Technology<\/em>, 3 August 2022. <a href=\"https:\/\/www.ptonline.com\/articles\/tracing-the-history-of-polymeric-materials-part-20-2\" rel=\"nofollow noopener\" target=\"_blank\">ptonline.com<\/a><\/li>\n      <\/ol>\n    <\/section>\n\n  <\/div>\n<\/div>\n\n<script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@graph\": [\n    {\n      \"@type\": \"Article\",\n      \"headline\": \"How Acrylic Is Made: From PMMA Sheet to Fabricated Parts\",\n      \"description\": \"How PMMA sheet is cast or extruded, and how factories cut, form, bond, and polish acrylic parts.\",\n      \"inLanguage\": \"en\",\n      \"author\": {\n        \"@type\": \"Person\",\n        \"name\": \"David Deng\",\n        \"jobTitle\": \"R&D manager\",\n        \"worksFor\": {\n          \"@type\": \"Organization\",\n          \"name\": \"Sanait Co., Ltd.\",\n          \"url\": \"https:\/\/www.sanait.com\/\"\n        }\n      },\n      \"publisher\": {\n        \"@type\": \"Organization\",\n        \"name\": \"Sanait\",\n        \"url\": \"https:\/\/www.sanait.com\/\"\n      },\n      \"dateModified\": \"2026-09-26\"\n    },\n    {\n      \"@type\": \"FAQPage\",\n      \"mainEntity\": [\n        {\n          \"@type\": \"Question\",\n          \"name\": \"Is laser-cut acrylic the same as manufactured acrylic?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"No. Laser cutting is a fabrication step on sheet that was already cast or extruded at a mill.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"Can acrylic be injection molded?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"Yes, from PMMA pellets. That is a different process from sheet fabrication.\"\n          }\n        }\n      ]\n    }\n  ]\n}\n<\/script>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[38],"tags":[],"class_list":["post-25333","post","type-post","status-publish","format-standard","hentry","category-guide"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How Acrylic Is Made: Cast, Extruded, Fabricated<\/title>\n<meta name=\"description\" content=\"Acrylic is made in two layers: MMA is polymerized into PMMA sheet, then factories cut, form, bond, and polish parts. Covers cast vs extruded and shop processes.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.sanait.com\/es\/how-acrylic-is-made\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How Acrylic Is Made: Cast, Extruded, Fabricated\" \/>\n<meta property=\"og:description\" content=\"Acrylic is made in two layers: MMA is polymerized into PMMA sheet, then factories cut, form, bond, and polish parts. Covers cast vs extruded and shop processes.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.sanait.com\/es\/how-acrylic-is-made\/\" \/>\n<meta property=\"og:site_name\" content=\"Sanait Co., Ltd\" \/>\n<meta property=\"article:published_time\" content=\"2026-09-26T05:47:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-09-26T05:47:52+00:00\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:label1\" content=\"Escrito por\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"Tiempo de lectura\" \/>\n\t<meta name=\"twitter:data2\" content=\"10 minutos\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.sanait.com\\\/how-acrylic-is-made\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.sanait.com\\\/how-acrylic-is-made\\\/\"},\"author\":{\"name\":\"admin\",\"@id\":\"https:\\\/\\\/www.sanait.com\\\/#\\\/schema\\\/person\\\/28d038ce002cbf4113df5e469956a6e8\"},\"headline\":\"How Acrylic Is Made: From MMA Sheet to Fabricated Parts\",\"datePublished\":\"2026-09-26T05:47:00+00:00\",\"dateModified\":\"2026-09-26T05:47:52+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.sanait.com\\\/how-acrylic-is-made\\\/\"},\"wordCount\":2083,\"publisher\":{\"@id\":\"https:\\\/\\\/www.sanait.com\\\/#organization\"},\"articleSection\":[\"Guide\"],\"inLanguage\":\"es\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.sanait.com\\\/how-acrylic-is-made\\\/\",\"url\":\"https:\\\/\\\/www.sanait.com\\\/how-acrylic-is-made\\\/\",\"name\":\"How Acrylic Is Made: Cast, Extruded, Fabricated\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.sanait.com\\\/#website\"},\"datePublished\":\"2026-09-26T05:47:00+00:00\",\"dateModified\":\"2026-09-26T05:47:52+00:00\",\"description\":\"Acrylic is made in two layers: MMA is polymerized into PMMA sheet, then factories cut, form, bond, and polish parts. Covers cast vs extruded and shop processes.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.sanait.com\\\/how-acrylic-is-made\\\/#breadcrumb\"},\"inLanguage\":\"es\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.sanait.com\\\/how-acrylic-is-made\\\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.sanait.com\\\/how-acrylic-is-made\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.sanait.com\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"How Acrylic Is Made: From MMA Sheet to Fabricated Parts\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.sanait.com\\\/#website\",\"url\":\"https:\\\/\\\/www.sanait.com\\\/\",\"name\":\"Sanait Co., Ltd\",\"description\":\"Premium Custom Acrylic Solutions\",\"publisher\":{\"@id\":\"https:\\\/\\\/www.sanait.com\\\/#organization\"},\"alternateName\":\"Sanait\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.sanait.com\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"es\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/www.sanait.com\\\/#organization\",\"name\":\"Sanait Co Ltd\",\"url\":\"https:\\\/\\\/www.sanait.com\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"es\",\"@id\":\"https:\\\/\\\/www.sanait.com\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/www.sanait.com\\\/wp-content\\\/uploads\\\/2021\\\/07\\\/new-logo-20210714.png\",\"contentUrl\":\"https:\\\/\\\/www.sanait.com\\\/wp-content\\\/uploads\\\/2021\\\/07\\\/new-logo-20210714.png\",\"width\":395,\"height\":80,\"caption\":\"Sanait Co Ltd\"},\"image\":{\"@id\":\"https:\\\/\\\/www.sanait.com\\\/#\\\/schema\\\/logo\\\/image\\\/\"}},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/www.sanait.com\\\/#\\\/schema\\\/person\\\/28d038ce002cbf4113df5e469956a6e8\",\"name\":\"admin\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"C\u00f3mo se fabrica el acr\u00edlico: moldeado, extruido, fabricado","description":"El acr\u00edlico se fabrica en dos capas: el MMA se polimeriza para obtener una l\u00e1mina de PMMA y, a continuaci\u00f3n, las f\u00e1bricas cortan, moldean, unen y pulen las piezas. Abarca tanto los procesos de moldeo como los de extrusi\u00f3n y los procesos de taller.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.sanait.com\/es\/how-acrylic-is-made\/","og_locale":"es_ES","og_type":"article","og_title":"How Acrylic Is Made: Cast, Extruded, Fabricated","og_description":"Acrylic is made in two layers: MMA is polymerized into PMMA sheet, then factories cut, form, bond, and polish parts. Covers cast vs extruded and shop processes.","og_url":"https:\/\/www.sanait.com\/es\/how-acrylic-is-made\/","og_site_name":"Sanait Co., Ltd","article_published_time":"2026-09-26T05:47:00+00:00","article_modified_time":"2026-09-26T05:47:52+00:00","author":"admin","twitter_misc":{"Escrito por":"admin","Tiempo de lectura":"10 minutos"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.sanait.com\/how-acrylic-is-made\/#article","isPartOf":{"@id":"https:\/\/www.sanait.com\/how-acrylic-is-made\/"},"author":{"name":"admin","@id":"https:\/\/www.sanait.com\/#\/schema\/person\/28d038ce002cbf4113df5e469956a6e8"},"headline":"How Acrylic Is Made: From MMA Sheet to Fabricated Parts","datePublished":"2026-09-26T05:47:00+00:00","dateModified":"2026-09-26T05:47:52+00:00","mainEntityOfPage":{"@id":"https:\/\/www.sanait.com\/how-acrylic-is-made\/"},"wordCount":2083,"publisher":{"@id":"https:\/\/www.sanait.com\/#organization"},"articleSection":["Guide"],"inLanguage":"es"},{"@type":"WebPage","@id":"https:\/\/www.sanait.com\/how-acrylic-is-made\/","url":"https:\/\/www.sanait.com\/how-acrylic-is-made\/","name":"C\u00f3mo se fabrica el acr\u00edlico: moldeado, extruido, fabricado","isPartOf":{"@id":"https:\/\/www.sanait.com\/#website"},"datePublished":"2026-09-26T05:47:00+00:00","dateModified":"2026-09-26T05:47:52+00:00","description":"El acr\u00edlico se fabrica en dos capas: el MMA se polimeriza para obtener una l\u00e1mina de PMMA y, a continuaci\u00f3n, las f\u00e1bricas cortan, moldean, unen y pulen las piezas. Abarca tanto los procesos de moldeo como los de extrusi\u00f3n y los procesos de taller.","breadcrumb":{"@id":"https:\/\/www.sanait.com\/how-acrylic-is-made\/#breadcrumb"},"inLanguage":"es","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.sanait.com\/how-acrylic-is-made\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.sanait.com\/how-acrylic-is-made\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.sanait.com\/"},{"@type":"ListItem","position":2,"name":"How Acrylic Is Made: From MMA Sheet to Fabricated Parts"}]},{"@type":"WebSite","@id":"https:\/\/www.sanait.com\/#website","url":"https:\/\/www.sanait.com\/","name":"Sanait Co., Ltd.","description":"Soluciones acr\u00edlicas personalizadas de alta calidad","publisher":{"@id":"https:\/\/www.sanait.com\/#organization"},"alternateName":"Sanait","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.sanait.com\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"es"},{"@type":"Organization","@id":"https:\/\/www.sanait.com\/#organization","name":"Sanait Co Ltd","url":"https:\/\/www.sanait.com\/","logo":{"@type":"ImageObject","inLanguage":"es","@id":"https:\/\/www.sanait.com\/#\/schema\/logo\/image\/","url":"https:\/\/www.sanait.com\/wp-content\/uploads\/2021\/07\/new-logo-20210714.png","contentUrl":"https:\/\/www.sanait.com\/wp-content\/uploads\/2021\/07\/new-logo-20210714.png","width":395,"height":80,"caption":"Sanait Co Ltd"},"image":{"@id":"https:\/\/www.sanait.com\/#\/schema\/logo\/image\/"}},{"@type":"Person","@id":"https:\/\/www.sanait.com\/#\/schema\/person\/28d038ce002cbf4113df5e469956a6e8","name":"admin"}]}},"_links":{"self":[{"href":"https:\/\/www.sanait.com\/es\/wp-json\/wp\/v2\/posts\/25333","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.sanait.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.sanait.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.sanait.com\/es\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.sanait.com\/es\/wp-json\/wp\/v2\/comments?post=25333"}],"version-history":[{"count":1,"href":"https:\/\/www.sanait.com\/es\/wp-json\/wp\/v2\/posts\/25333\/revisions"}],"predecessor-version":[{"id":25334,"href":"https:\/\/www.sanait.com\/es\/wp-json\/wp\/v2\/posts\/25333\/revisions\/25334"}],"wp:attachment":[{"href":"https:\/\/www.sanait.com\/es\/wp-json\/wp\/v2\/media?parent=25333"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.sanait.com\/es\/wp-json\/wp\/v2\/categories?post=25333"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.sanait.com\/es\/wp-json\/wp\/v2\/tags?post=25333"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}