Material Analysis
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PLA Thermal Degradation Products
Fenómeno del problema
Irritating odor appears in the PLA high-temperature processing workshop, and the safety assessment requires a clear composition
Análisis de la causa
PLA begins to degrade at 300℃ and is 90% degraded at 450℃; the thermal degradation products contain irritating substances such as acetaldehyde, acrolein, methanol and acetic acid; combustible in fire
Solución
①Keep the processing temperature away from the 300℃ degradation zone; ②Workshop exhaust configuration; ③Compile the safety data sheet per the degradation products; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Conclusión clave
PLA's thermal safety boundary is at 300℃; the degradation product list is the basis for workshop safety assessment; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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