TPU Filament Guide: Printing Flexible Parts Like a Pro
Master TPU printing with this complete guide. Settings, tips, and common mistakes to avoid when printing flexible filaments.
Why TPU Is Worth the Challenge
TPU (Thermoplastic Polyurethane) lets you print flexible, rubber-like parts. Phone cases, gaskets, shoe insoles, drone bumpers — things no rigid filament can do.
Essential TPU Settings
- Temperature: 220-240°C (start at 230°C)
- Bed temperature: 50-60°C
- Print speed: 20-30mm/s (slow is key)
- Retraction: Minimal or disabled
- Direct drive extruder: Strongly recommended
The #1 TPU Mistake
Using a Bowden tube extruder. The flexible filament buckles inside the long tube. If you must use Bowden, print extremely slowly (15mm/s) and use minimal retraction.
Shore Hardness Explained
TPU comes in different hardnesses:
- 95A: Most common, good flexibility and printability
- 85A: Very flexible, harder to print
- 70A: Extremely soft, requires specialized setup
Start with 95A for the best balance of flexibility and printability.
Best Use Cases
TPU is perfect for parts that need to absorb shock, create seals, or flex repeatedly without breaking. Think wearables, protective cases, vibration dampeners, and custom grips.
Cost Consideration
TPU costs more per kg (€26-30 for 500g spools) and prints much slower than PLA. Factor the extra print time into your cost calculations using our calculator.
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