What Is Acrylic Made Of?
Acrylic is a transparent thermoplastic formally known as polymethyl methacrylate (PMMA), produced by polymerizing methyl methacrylate monomer into a rigid, lightweight solid. It transmits up to 92% of visible light — more than standard plate glass — and is sold under trade names including Plexiglas, Lucite, and Acrylite. Despite different brand names, the underlying material and performance characteristics are consistent.
What Is the Difference Between Cast and Extruded Acrylic?
Cast and extruded are the two primary manufacturing grades, and choosing correctly between them affects optical quality, tolerances, and cost.
Made by curing liquid monomer between glass plates. Denser molecular structure, tighter thickness tolerances, superior optical clarity. Standard for display work, optical applications, and precision assemblies.
Produced at higher throughput by pushing molten polymer through a die. Slightly softer, more economical, bonds well with solvent cements. Practical for thermoforming and cost-driven production runs.
Both grades are stocked at Plastic-Craft Products in a wide range of thicknesses, colors, and sheet sizes with no minimum order requirement.
What Are the Key Properties of Acrylic Sheet?
Optical clarity: Up to 92% light transmission with excellent color neutrality across the visible spectrum.
UV stability: Inherently UV-resistant without additives; will not yellow, haze, or become brittle under prolonged outdoor exposure.
Impact resistance: Approximately 10 times more impact-resistant than glass at equivalent thickness, making it a safer and lighter glazing alternative.
Scratch resistance: Surface hardness significantly outperforms polycarbonate. Minor surface damage can often be restored with Micro-Mesh abrasive polishing.
Machinability: Saws, drills, routes, engraves, and laser cuts cleanly. Edges can be flame- or diamond-polished to optical clarity.
Chemical resistance: Resists dilute acids, alkalis, and most inorganic chemicals. Susceptible to aromatic solvents and ketones.
One specification detail to account for: acrylic has a higher thermal expansion coefficient than metal. Assemblies exposed to temperature cycling should include tolerances that allow for dimensional movement at fastener holes and bonded joints to prevent stress cracking.
What Is Acrylic Sheet Used For?
Acrylic is specified across a broad range of industries because its combination of transparency, weatherability, and fabrication flexibility addresses applications where glass is too heavy or fragile, and polycarbonate lacks the surface quality.
For defense and aerospace programs, Plastic-Craft Products operates under ISO 9001:2015 and AS9100D certifications — the aerospace quality standard governing full traceability and process documentation for mission-critical components.
What Should You Specify When Ordering Acrylic?
A complete specification prevents rework and schedule delays. Confirm: grade (cast or extruded), thickness with required tolerance, color and light transmission level, and edge finish — saw cut, machined, flame-polished, or diamond-polished.
For bonded assemblies, Weld-On and Acrifix solvent cements are stocked in-house. Plastic-Craft Products also offers CNC routing, laser cutting, thermoforming, line bending, and a full range of secondary fabrication — material and finished parts sourced from a single ISO-certified supplier.
Frequently Asked Questions
Is acrylic stronger than glass?
Yes. Acrylic is approximately 10 times more impact-resistant than glass at the same thickness. It is also significantly lighter, making it the preferred alternative for glazing, guards, and enclosures where safety and weight are both factors.
Does acrylic turn yellow over time?
No — acrylic is inherently UV-stable and will not yellow or become brittle with outdoor exposure. This distinguishes it from many other clear plastics, including some grades of polycarbonate, which can yellow without UV coatings.
What is the difference between acrylic and polycarbonate?
Acrylic offers superior optical clarity, better UV stability, and higher surface hardness. Polycarbonate offers greater impact resistance and is more flexible. For display, signage, and outdoor glazing, acrylic is typically the better choice. For extreme impact resistance, polycarbonate is preferred.
Can acrylic be cut to custom sizes?
Yes. Plastic-Craft Products cuts acrylic sheet, rod, and tube to exact customer dimensions in-house. There are no minimum order quantities, making it practical for both prototype and full production orders.
Where can I buy acrylic sheet?
Plastic-Craft Products stocks cast and extruded acrylic sheet, rod, and tube at their facility in West Nyack, NY. Call (845) 358-3010, email [email protected], or request a quote online.
Ready to Order Acrylic Sheet, Rod, or Tube?
Plastic-Craft Products stocks cast and extruded acrylic in dozens of grades, colors, and thicknesses — cut to your exact dimensions with no minimum orders and in-house fabrication.
(845) 358-3010