PETG (Polyethylene Terephthalate Glycol) is a versatile material that combines the ease of PLA with improved strength and heat resistance. It’s the go-to material for functional parts.
Properties
- Strength — Higher impact resistance than PLA
- Heat Resistance — Better than PLA (~80°C glass transition)
- Chemical Resistance — Good resistance to many chemicals
- Flexibility — Slightly flexible, less brittle than PLA
- Layer Adhesion — Excellent interlayer bonding
Best Practices
- Heated bed required (75-85°C)
- Reduce fan speed (50-70%) for better layer adhesion
- Increase retraction to reduce stringing
- Avoid over-squishing the first layer (PETG sticks too well)
- Dry filament before use if exposed to humidity