Selecting the right additive manufacturing polymer determines whether a prototype can be used for functional load testing or merely visual verification. Each material class has distinct mechanical boundaries.
PLA is excellent for fast dimensional checks due to its low thermal shrinkage. However, its low glass transition temperature makes it useless for structural or high-temperature tests.
"Choosing the correct filament is the difference between a functional load prototype and a cosmetic model."
ABS and PETG: Tougher Alternatives
ABS provides high impact resistance and can be vapor-smoothed, but requires a heated chamber to prevent layer splitting. PETG acts as a middle ground, offering high durability and chemical resistance with the easy printing characteristics of PLA.
Functional Engineering Nylon
For high-load parts like gears and brackets, Nylon is the gold standard. It possesses high tensile strength and elastic deflection, allowing prototypes to survive cyclic stress testing in functional environments.