PMMA vs PLA
Compare PMMA and PLA filaments side-by-side so you can pick the right one for your 3D printing project.
PMMA vs PLA: PMMA is known for best-in-class clarity, while PLA is known for easiest to print. PLA is easier to print; PMMA prints at higher nozzle temperatures (230-260°C vs 190-220°C). Choose PMMA for best-in-class clarity, or PLA for easiest to print.
Key differences at a glance
PMMA
CAcrylic / Plexiglass / Perspex
Best-in-class clarity; can be buffed/frosted/polished
PLA
APolylactic Acid
Easiest to print, cheap, widely available, fast, good bridges/overhangs, easy support removal
Detailed Comparison
Green marks the generally easier or more forgiving option in that row, based on tier, enclosure needs, and moisture sensitivity. It is not always the better choice for a specific job, so weigh it against what your project actually needs.
Strengths Comparison
PMMA Strengths
- Best-in-class clarity; can be buffed/frosted/polished
- Good UV resistance
- Clarity and rigidity for display parts
PLA Strengths
- Easiest to print, cheap, widely available, fast, good bridges/overhangs, easy support removal
- Stiff non-composite thermoplastic, good tensile strength
Considerations
PMMA Caveats
- Terrible bed and layer adhesion; high thermal expansion; brittle
- Prints often fail during/after
- Can crack/warp; requires tuning
PLA Caveats
- Creeps under sustained load
- Poor heat resistance, UV degradation, can shatter on drops
- Not great for sanding/gluing/painting/touch-ups