CNC Machining
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View CNC MachiningAmorphous Thermoplastic
Acrylic (PMMA, Polymethyl Methacrylate)
Acrylic is a rigid, glass-clear plastic with excellent optical clarity and weather resistance. It machines, laser cuts, and polishes well, making it common for displays, light guides, and covers. Request a quote or browse all materials.
Typical Properties
Acrylic (PMMA) at a glance
| Property | Typical value |
|---|---|
| Density | ~1.18–1.19 g/cm³ |
| Tensile strength | ~65–75 MPa |
| Tensile modulus | ~3.1–3.3 GPa |
| Elongation at break | ~2–5% |
| Light transmission | ~92% (clear, 3 mm) |
| Heat deflection (1.8 MPa) | ~95–100 °C |
| Glass transition | ~105 °C |
| Refractive index | ~1.49 |
Typical values for cast and extruded clear sheet. These are typical reference values from standard published data, not guaranteed minimums. Request material certificates in your RFQ if properties must be verified.
Advantages
Why engineers choose Acrylic (PMMA)
Clarity
Higher light transmission than polycarbonate.
Weatherability
Good UV and outdoor resistance.
Finishing
Edges can be flame or vapor polished; laser cuts with polished edges.
Scratch resistance
Harder surface than polycarbonate.
Design considerations: Brittle compared with polycarbonate and can crack at sharp corners or under impact; sensitive to some solvents (crazing).
Applications
Common uses
Display covers and windowsLight guides and lensesSignageFluidic and lab prototypesProtective shields
Processes and Finishes
How 3DWK can make it
Laser Cutting
Quote Acrylic (PMMA) parts made with Laser Cutting.
View Laser CuttingInjection Molding
Quote Acrylic (PMMA) parts made with Injection Molding.
View Injection MoldingBrushing & Polishing
A common finish option for Acrylic (PMMA) parts.
View finishLaser Engraving & Marking
A common finish option for Acrylic (PMMA) parts.
View finishAlternatives
Related materials
Polycarbonate
Compare properties and trade-offs.
View PolycarbonateABS
Compare properties and trade-offs.
View ABSPEI (Ultem)
Compare properties and trade-offs.
View PEI (Ultem)Ready to Quote
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