Uploaded March 2026 | Updated September 2026, 2 weeks ago

---

Recently a few comments mentioned that an actively heated chamber could reduce the risk of brittle filaments breaking. Some filaments become so brittle that they can snap in the PTFE tube if they are bent too much.

I wanted to check if this idea is actually true.

In this video I tested five brittle filaments and measured their bending behavior at room temperature and after heating to see if a warm environment really makes them less brittle. Is a heated chamber a real solution, or just a myth?

Tested filaments:
Polymaker ABS-CF10
Qidi PAHT-CF
YXPolyer PC-CF
Qidi PET-GF
Polymaker PPS-CF10

If you enjoy these tests and want to support the channel, you can do it here:
Patreon: patreon.com/mytechfun
Buy Me a Coffee: buymeacoffee.com/mytechfun

Or visit the channel sponsor Polymaker:
https://us.polymaker.com?aff=49&utm_source=affiliately&utm_campaign=aff

Mentioned in the video

Filament bending tool used in the test:
printables.com/model/1272221-filament-bending-test

Chapters

0:00 Introduction
1:14 Testing method
2:08 Tested filaments
3:22 Calculation
4:02 Testing on room temperature
5:50 Testing after heating
8:37 Results
9:09 Conclusions

#3dprinting #filament #brittlefilament #heatedchamber #3dprinter #filamenttesting #engineering #mytechfun