Is Polymaker PET-GF15 the Ultimate Budget Technical Filament?

🧪 In this video, I test Polymaker PET-GF15, a glass fiber–reinforced PET filament that is often positioned as a budget-friendly technical material. I tested six different colors, using the same test methodology I apply across my filament reviews, to see how much the material — and the color — really matters. 🖨️ The video covers printability, brittleness, slicer settings, annealing behavior, dimensional changes, and a full mechanical test series including tensile strength, layer adhesion, shear, torsion, creep, bending, impact resistance, and temperature resistance. 📊 All test objects were printed and evaluated under controlled conditions so the results can be directly compared with other materials I’ve tested earlier on the channel. In this video, I also include reference results from my Polymaker PET-CF17 test for direct comparison. Product link 🔗 Polymaker PET-GF15 (affiliate, US only): https://us.polymaker.com/products/fib... Patreon ❤️ My Patreon supporters sometimes get early access to video and access to a summary spreadsheet that contains all previous test results, measured with the same test method. This makes it easy to compare PET-GF15 with PET-CF, PA-based filaments, and other technical materials. 👉   / mytechfun   Mentioned in the video ▶️ PET-CF filament test:    • Review of Fiberon PET-CF17, a great techni...   ▶️ Digital impact testing machine:    • Cheap Chinese Digital Impact Tester for IZ...   ⏱️Chapters 0:00 Introduction 0:55 Specifications 3:06 Unboxing 3:43 Brittleness of filament 4:48 Slicer settings (wrench) 5:11 3D printing wrench 6:18 Final slicer settings 6:35 3D printing test objects 7:23 Two-color printing 7:47 Annealing 8:07 Shrinking 8:37 Tensile test 9:01 Layer adhesion 9:56 Shear test 11:09 Torsion test 12:16 Creep test 13:41 Temperature test 15:05 Bending test 15:44 Impact test(s) 17:54 All results 18:34 Conclusions Tags #Polymaker #PETGF15 #GlassFiberFilament #TechnicalFilament #3DPrinting #FilamentTest #MaterialTesting #Annealing #LayerAdhesion #TensileTest #ImpactTest #3DPrintStrength #MyTechFun