Biodegradable Polyester Alternatives: PLA, PHA, PBS
topic
Biodegradable polyesters for textile use: PLA (polylactic acid, Tg 57°C, Tm 170°C) — compostable (EN 13432, industrial composting only, not home composting or marine), good tensile strength (20–60 cN/dtex), poor heat resistance, dyed with disperse dyes at low temperature. PHA (polyhydroxyalkanoates, bacterial biosynthesis) — marine biodegradable, high cost, brittle. PBS (polybutylene succinate) — flexible, biodegradable, blended with PLA for improved toughness. None match PET mechanical performance across all parameters.
Role
Biodegradable polyester alternatives address end-of-life environmental impact, particularly microplastics. Their performance trade-offs versus PET, biodegradation conditions (marine vs. industrial composting), and LCA comparison are critical for evidence-based material selection.