Europe: Understanding PLA Thermal Limits
Heat resistance is critical for buyers evaluating PLA for high-temperature applications. Standard PLA Tg 55-60 C, HDT around 55 C, limiting use near heat or sunlight. Understanding limits and mitigation is essential.
PLA Thermal Properties
PLA softens at 55-60 C, below ABS (HDT above 95 C) or PETG (70 C). Parts in hot cars or near heat deform. Communicate limitations.
| Material | Tg | HDT |
|---|---|---|
| PLA | 55-60 C | 55 C |
| PETG | 80 C | 70 C |
| ABS | 105 C | 95 C |
Annealing PLA
Heating above Tg but below melting allows chain reorganization. HDT to 70-85 C. Oven 80-110 C, 30-60 min. Shrinkage 2-5%, compensate in design.
When to Choose Alternatives
Below 50 C: PLA. 50-65: annealed PLA or PETG. Above 65: ABS. Our ABS High-Impact Grey: HDT above 95 C.
High-Temp PLA (PLA+)
Blends with biopolymers, HDT 70-85 C without annealing. Verify with test data.
Testing Heat Resistance
ASTM D648 HDT. Practical: oven at service temp 24 hours, measure change. Testing on request.
Application Scenarios
Indoor decorative: PLA. Electronics: annealed or PETG. Automotive: ABS. Outdoor: ASA. Hot-fill: PETG.
Communicating Limits
Document max temp, warn about cars and sunlight, recommend alternatives. Selection guide reduces complaints.
Quality Documentation
Each batch: Tg, HDT, CTE in COA per ASTM. Custom reports 500+.
FAQ
Max temp?
Softens 55-60 C. Below 50 continuous. Annealed 70-85.
Anneal PLA?
Yes. 80-110 C, 30-60 min. HDT 70-85. Shrink 2-5%.
When ABS?
Above 65 C, heat, impact. Our ABS: HDT above 95 C.
PLA+?
HDT 70-85 without annealing. Verify independently.
Test HDT?
ASTM D648. Oven 24 hours. Custom 500+.
Deform in cars?
Yes. 60-70 C. Use ABS or ASA.
Annealing affects dimensions?
2-5% shrink. Design larger. Test first.
Thermal data per batch?
Yes. Tg, HDT, CTE in COA.