Flexible parts
TPU 95A provides the ideal balance of flexibility and printability for phone cases, gaskets, shoe soles, and rubber-like components.
Considerations for Flexible Applications
Flexibility and Elasticity - Flexible parts need materials that can bend, stretch, and compress without breaking. Look for high elongation at break values (300-600%).
Abrasion Resistance - Parts that experience repeated flexing or contact need materials that won't wear down quickly.
Chemical Resistance - Many flexible applications require resistance to oils, solvents, and environmental factors.
Printability - Flexible materials can be challenging to print, requiring specific settings and printer configurations.
Top Material Recommendation
TPU 95A (Thermoplastic Polyurethane)
The gold standard for flexible 3D printing applications:
- 300-600% elongation at break
- Excellent abrasion resistance
- Superior chemical resistance
- Ideal shore hardness for most applications
Best for
Limitations
Recommended Brands
NinjaFlex - Pioneer in flexible filament technology, known for consistent quality and excellent layer adhesion.
Polymaker TPU-95A - Professional-grade TPU with excellent printability and mechanical properties.
AMFG TPU - Cost-effective option with good flexibility and print quality.
MatterHackers TPU - Reliable choice with consistent diameter and good chemical resistance.
Makeshaper TPU - Premium option with enhanced abrasion resistance.
Design Considerations
Print Settings
- Speed: 15-30mm/s for best results
- Retraction: Minimal or disabled to prevent jams
- Layer Height: 0.2-0.3mm for good layer adhesion
- Infill: 20-40% depending on desired flexibility
Extruder Setup
- Direct drive extruders work best
- Bowden systems require careful tuning
- Steel nozzles recommended for abrasive variants
Support Strategy
- Use soluble supports when possible
- Tree supports work better than linear
- Avoid overhangs greater than 45° when possible
Applications
Consumer Products
- Phone cases - Shock absorption and grip
- Wearables - Comfortable contact with skin
- Toys - Safe, flexible play items
Industrial Applications
- Gaskets - Sealing applications
- Dampeners - Vibration isolation
- Flexible couplings - Mechanical power transmission
Automotive
- Interior trim - Soft-touch surfaces
- Seals - Weather stripping
- Grips - Non-slip surfaces
Remember that flexible filaments require patience and proper printer setup. Start with simple geometries and gradually work up to more complex flexible parts as you master the material.