PMMA (Plexiglas, acrylic) is the clear plastic that holds up best to weather and sunlight. It is more optically pure than PC but considerably more brittle. Common for displays, optical components, and architectural panels.
Mechanical and physical properties
| Property | Value |
|---|---|
| Tensile strength | 65 MPa |
| Elongation at break | 5% |
| Density | 1.18 g/cm³ |
| Modulus | 3.0 GPa |
| Max service temperature | 70-90 °C |
| Optical transmission | 92% |
| Hardness (Rockwell M) | 98 |
Typical applications
- Display cases and signage.
- Optical lenses and light pipes.
- Architectural panels and skylights.
- Aquarium and tank windows.
PMMA vs PC
PMMA is clearer and weather-resistant; PC is impact-resistant. For exposed outdoor signage with no impact risk, PMMA. For machine guards or anything that may be hit, PC.
Specifying it on Uretyco
- 1Pick PMMA from the dropdown
Cast (better optics) or extruded (cheaper).
- 2Specify polish for cosmetic edges
Flame polish or diamond polish for clear edges.
- 3Plan for laser cutting
Cast PMMA produces clean, polished edges from laser.
- 4Avoid sharp corners under load
PMMA is brittle; relax internal radii in load-bearing geometry.
Related materials
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