Semi-flexible TPU vs ASA
Compare Semi-flexible TPU and ASA filaments side-by-side. See which one is best for your 3D printing project.
Semi-flexible TPU
BMid-durometer TPU
Good balance for bumpers/hinges/impacty parts
ASA
AAcrylonitrile Styrene Acrylate
Excellent UV resistance (outdoors indefinitely), tough, matte surface
Detailed Comparison
Property
Semi-flexible TPU
ASA
Tier Rating
Tier B
Tier A
Family
Flexible
ASA
Nozzle Temp
210-230°C
220-275°C
Bed Temp
40-60°C
90-110°C
Enclosure
not needed
recommended
Cooling
Moderate cooling
Low to moderate; avoid drafts
Moisture Sensitivity
high
moderate
Strengths Comparison
Semi-flexible TPU Strengths
- Good balance for bumpers/hinges/impacty parts
ASA Strengths
- Excellent UV resistance (outdoors indefinitely), tough, matte surface
- Less warping than ABS; low viscosity enables very high speed printing
- High heat tolerance (~boiling water range)
Considerations
Semi-flexible TPU Caveats
- Too stiff for some flexible uses; too soft for some rigid uses
ASA Caveats
- Still off-gasses; enclosure/ventilation recommended
- Can still warp; needs tuning
Frequently Asked Questions
Is Semi-flexible TPU or ASA better for 3D printing?
ASA is generally rated higher (Tier A) compared to Semi-flexible TPU (Tier B). However, the best choice depends on your specific needs: Semi-flexible TPU is best for Good balance for bumpers/hinges/impacty parts, while ASA is best for Excellent UV resistance (outdoors indefinitely), tough, matte surface.
What are the temperature differences between Semi-flexible TPU and ASA?
Semi-flexible TPU prints at 210-230°C nozzle / 40-60°C bed. ASA prints at 220-275°C nozzle / 90-110°C bed.
Do Semi-flexible TPU and ASA need an enclosure?
Semi-flexible TPU: not needed. ASA: recommended.
Which is more beginner-friendly: Semi-flexible TPU or ASA?
Semi-flexible TPU is more beginner-friendly as it doesn't require an enclosure.