Uploaded February 2026 | Updated September 2026, 2 weeks ago
Sunlu sent me their PPA-CF filament for testing. The results were surprising.
This material turned out to be one of the stiffest filaments I have ever tested in bending. The flexural performance is outstanding, and the creep resistance under load is also impressive.
However, there is a catch: the filament itself is quite brittle. And while this is not unusual for carbon fiber reinforced materials, it may explain why this product was discontinued before reaching a wider market.
In this video I test Sunlu PPA-CF using my standard methodology: tensile strength, layer adhesion, shear, torsion, impact, temperature resistance, creep behavior and bending stiffness — so you can compare it directly with all previously tested materials in my spreadsheet.
Was canceling it the right decision? Let’s look at the numbers.
Link to other Sunlu products (affiliate):
https://www.sunlu.com?sca_ref=6072024.hoQfHOudeF
Support My Work
If you find these independent material tests useful, you can support the channel here:
Patreon (early access + full comparison spreadsheet):
patreon.com/mytechfun
Buy Me a Coffee:
buymeacoffee.com/mytechfun
Thank you for helping me continue testing more advanced materials.
Chapters
0:00 Introduction
0:54 About PPA-CF
1:16 Unboxing
2:08 Filament brittleness
2:38 Preparing the printing
3:00 Test print
4:16 Drying, moisture
5:43 Second test print
6:47 Slicer settings
7:12 3D printing
7:34 Tensile test
7:58 Layer adhesion
8:23 Shear test
9:03 Torsion test
9:39 Impact test(s)
10:14 Temperature test
10:36 Creep test
11:45 Bending test
12:19 All results
12:44 Conclusions
Tags
#3Dprinting #PPA #CarbonFiber
#Sunlu #PPACF #EngineeringFilament #HighTempFilament
#FlexuralTest #TensileTest #LayerAdhesion #CreepTest
#ImpactTest #ShearTest #TorsionTest #BendingTest
#AdvancedMaterials #3DPrintingTest #MaterialTesting
Sunlu sent me their PPA-CF filament for testing. The results were surprising.
This material turned out to be one of the stiffest filaments I have ever tested in bending. The flexural performance is outstanding, and the creep resistance under load is also impressive.
However, there is a catch: the filament itself is quite brittle. And while this is not unusual for carbon fiber reinforced materials, it may explain why this product was discontinued before reaching a wider market.
In this video I test Sunlu PPA-CF using my standard methodology: tensile strength, layer adhesion, shear, torsion, impact, temperature resistance, creep behavior and bending stiffness — so you can compare it directly with all previously tested materials in my spreadsheet.
Was canceling it the right decision? Let’s look at the numbers.
Link to other Sunlu products (affiliate):
https://www.sunlu.com?sca_ref=6072024.hoQfHOudeF
Support My Work
If you find these independent material tests useful, you can support the channel here:
Patreon (early access + full comparison spreadsheet):
patreon.com/mytechfun
Buy Me a Coffee:
buymeacoffee.com/mytechfun
Thank you for helping me continue testing more advanced materials.
Chapters
0:00 Introduction
0:54 About PPA-CF
1:16 Unboxing
2:08 Filament brittleness
2:38 Preparing the printing
3:00 Test print
4:16 Drying, moisture
5:43 Second test print
6:47 Slicer settings
7:12 3D printing
7:34 Tensile test
7:58 Layer adhesion
8:23 Shear test
9:03 Torsion test
9:39 Impact test(s)
10:14 Temperature test
10:36 Creep test
11:45 Bending test
12:19 All results
12:44 Conclusions
Tags
#3Dprinting #PPA #CarbonFiber
#Sunlu #PPACF #EngineeringFilament #HighTempFilament
#FlexuralTest #TensileTest #LayerAdhesion #CreepTest
#ImpactTest #ShearTest #TorsionTest #BendingTest
#AdvancedMaterials #3DPrintingTest #MaterialTesting
