Material Drying
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PA12 Product Embrittlement and Fracture
Fenómeno del problema
The product breaks brittlely under stress, more severe at low temperature.
Análisis de la causa
Material degradation or insufficient drying reduces molecular weight; PA12 itself has good low-temperature toughness but is still sensitive at notches; excessive shear also reduces toughness.; During on-site troubleshooting, verify item by item according to this mechanism to avoid blindly adjusting the machine based solely on experience
Solución
①Control processing temperature to prevent degradation; ②sufficient drying; ③avoid sharp corners and notches in structure; ④select toughened grade for verification.; After adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Conclusión clave
For PA12 embrittlement, check degradation and moisture; structural design cooperates with material protection.; After confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; Include this case in the defect archive as a troubleshooting reference for subsequent similar problems
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