Sunlu PPA-CF – The Stiffest Filament You Can’t Buy

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... Support My Work If you find these independent material tests useful, you can support the channel here: Patreon (early access + full comparison spreadsheet):   / mytechfun   Buy Me a Coffee: https://www.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