Glass-filled Nylon vs TPU
Compare Glass-filled Nylon and TPU filaments side-by-side so you can pick the right one for your 3D printing project.
Glass-filled Nylon vs TPU: Glass-filled Nylon is known for massively stiffer/tougher/more heat & abrasion resistant than nylon, while TPU is known for excellent layer adhesion. TPU is easier to print; Glass-filled Nylon prints at higher nozzle temperatures (260-290°C vs 200-240°C). Choose Glass-filled Nylon for massively stiffer/tougher/more heat & abrasion resistant than nylon, or TPU for excellent layer adhesion.
Key differences at a glance
Glass-filled Nylon
SPA-GF / GFPA
Massively stiffer/tougher/more heat & abrasion resistant than nylon
TPU
SThermoplastic Polyurethane
Excellent layer adhesion; extremely impact resistant; highly durable
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
Glass-filled Nylon Strengths
- Massively stiffer/tougher/more heat & abrasion resistant than nylon
- Warping reduced enough to be fairly easy to print (with correct setup)
- Viable alternative to machined aluminum for some parts
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
Glass-filled Nylon Caveats
- Higher print temps; hardware wear if not equipped
TPU Caveats
- Slow printing; retraction can cause jams (especially in Bowden setups)
- Stringing is common
- Very moisture sensitive; wet TPU prints poorly