HDPE vs PLA
Compare HDPE and PLA filaments side-by-side so you can pick the right one for your 3D printing project.
HDPE vs PLA: HDPE is known for common recycled polymer, while PLA is known for easiest to print. PLA is easier to print; HDPE is less moisture-sensitive; HDPE prints at higher nozzle temperatures (220-260°C vs 190-220°C). Choose HDPE for common recycled polymer, or PLA for easiest to print.
Key differences at a glance
HDPE
FHigh Density Polyethylene
Common recycled polymer; sometimes used for purging between temp ranges
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
HDPE Strengths
- Common recycled polymer; sometimes used for purging between temp ranges
PLA Strengths
- Easiest to print, cheap, widely available, fast, good bridges/overhangs, easy support removal
- Stiff non-composite thermoplastic, good tensile strength
Considerations
HDPE Caveats
- Extremely prone to warping, bed release, layer splitting; described as worst filament overall
PLA Caveats
- Creeps under sustained load
- Poor heat resistance, UV degradation, can shatter on drops
- Not great for sanding/gluing/painting/touch-ups