PLA, PETG and TPU solve different project needs. PLA is stiff and easy, PETG is tougher and more moisture resistant, and TPU is flexible. Select by load, temperature, impact and deformation.
Project checklist
- Temperature and sunlight.
- Static or impact load.
- Required flexibility.
- Surface and cost.
Material roles
PLA for visual models and stiff light-duty parts; PETG for tough functional parts; TPU for seals, grips and dampers. All require a validated profile.
Validate
- Print in service orientation.
- Test the loaded feature.
- Record dimensions and failure.
| Requirement | PLA | PETG | TPU |
|---|---|---|---|
| Stiffness | High | Medium | Low |
| Toughness | Low | Medium-high | Elastic |
| Heat | Low | Moderate | Low |
| Flexibility | None | Low | High |
Common engineering mistakes
- Choosing by popularity.
- Ignoring heat.
- Using TPU without support design.
- Comparing different infills.
- Skipping a functional test.
Buyer checklist
- What is the temperature?
- Is impact expected?
- Is flexibility required?
- Does the printer support it?
- Was the part tested?
Describe the application through our quote form.