Material Drying
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PA6 Dry-State and Conditioned-State Data
Fenómeno do problema
Products designed according to dry-state strength have insufficient toughness after installation, or products designed according to the conditioned state have out-of-tolerance dimensions
Análise das causas
The performance difference between dry-state and conditioned-state PA6 is huge: conditioned-state tensile strength drops 40-50% but impact strength rises 2-3 times; mixing the two sets of data causes the design safety factor to be built on the wrong basis
Solução
①Design calculations clearly indicate whether the service state is dry or conditioned; ②Load-bearing parts are checked against conditioned-state data; ③Drawings and technical agreements uniformly specify the test state; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Conclusão principal
PA6 performance data must carry a state label; mixing dry and conditioned states is the most common hidden error on the design side and must be eliminated at the drawing level; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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