Material Drying
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PA12 Product Embrittlement and Fracture
Problem Phenomenon
The product breaks brittlely under stress, more severe at low temperature.
Cause Analysis
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
Solution
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
Key Takeaway
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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