Fiberlogy FiberFlex 40D vs TPU

Compare Fiberlogy FiberFlex 40D and TPU filaments side-by-side so you can pick the right one for your 3D printing project.

Fiberlogy FiberFlex 40D vs TPU: Fiberlogy FiberFlex 40D is known for excellent layer adhesion, while TPU is known for excellent layer adhesion. Both have no enclosure requirements; Fiberlogy FiberFlex 40D is less moisture-sensitive; Fiberlogy FiberFlex 40D prints at higher nozzle temperatures (230°C vs 200-240°C). Choose Fiberlogy FiberFlex 40D for excellent layer adhesion, or TPU for excellent layer adhesion.

Key differences at a glance

Property
Fiberlogy FiberFlex 40D
TPU
Nozzle temp
230°C
200-240°C
Bed temp
60°C
30-60°C
Enclosure needed
No
No
Ease of printing
Easy
Easy
Moisture sensitivity
low
high

Fiberlogy FiberFlex 40D

-

Excellent layer adhesion; extremely impact resistant; highly durable

TPU

S

Thermoplastic Polyurethane

Excellent layer adhesion; extremely impact resistant; highly durable

Detailed Comparison

Property
Fiberlogy FiberFlex 40D
TPU
Tier Rating
Tier null
Tier S
Family
Flexible
Flexible
Nozzle Temp
230°C
200-240°C
Bed Temp
60°C
30-60°C
Enclosure
not needed
not needed
Cooling
Moderate cooling
Moisture Sensitivity
low
high

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

Fiberlogy FiberFlex 40D Strengths

  • Excellent layer adhesion; extremely impact resistant; highly durable
  • Great for combat robots, tactical/rough-use parts
  • Rubber-like parts (gaskets, grips, bumpers, wheels)

TPU Strengths

  • Excellent layer adhesion; extremely impact resistant; highly durable
  • Great for combat robots, tactical/rough-use parts
  • Rubber-like parts (gaskets, grips, bumpers, wheels)

Considerations

Fiberlogy FiberFlex 40D Caveats

  • Slow printing; retraction can cause jams (especially in Bowden setups)
  • Stringing is common
  • Very moisture sensitive; wet TPU prints poorly

TPU Caveats

  • Slow printing; retraction can cause jams (especially in Bowden setups)
  • Stringing is common
  • Very moisture sensitive; wet TPU prints poorly

Frequently Asked Questions

What is the difference between Fiberlogy FiberFlex 40D and TPU?
Fiberlogy FiberFlex 40D prints at 230°C nozzle / 60°C bed (No enclosure, low moisture sensitivity). TPU prints at 200-240°C nozzle / 30-60°C bed (No enclosure, high moisture sensitivity).
Is Fiberlogy FiberFlex 40D or TPU stronger?
Our dataset does not include comparable tensile strength values for both. Qualitatively, Fiberlogy FiberFlex 40D is suited to excellent layer adhesion, while TPU is suited to excellent layer adhesion.
Which prints at a higher temperature, Fiberlogy FiberFlex 40D or TPU?
Fiberlogy FiberFlex 40D prints at a higher temperature (230°C nozzle vs 200-240°C for TPU).
Is Fiberlogy FiberFlex 40D or TPU better for beginners?
Fiberlogy FiberFlex 40D is better for beginners: enclosure is no and moisture sensitivity is low, vs no enclosure and high moisture for TPU.
Should I use Fiberlogy FiberFlex 40D or TPU for flexible parts?
For flexible parts, Fiberlogy FiberFlex 40D is usually the better fit (Excellent layer adhesion). Choose TPU instead when excellent layer adhesion.

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