Material Drying
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PA66 low-temperature impact shortcoming
Fenómeno del problema
PA66 parts used in cold regions fracture brittlely at low temperature, yet the same grade passes testing at normal temperature
Análisis de la causa
PA66 low-temperature impact performance is inferior to PA6, and brittleness is significant under the dual action of dry state and low temperature; if cold-region applications are designed according to normal-temperature data, hidden dangers of batch failure will be left
Solución
①Perform low-temperature impact verification for cold-region applications; ②Select toughened modified grades or evaluate PA6 substitution; ③Low-temperature performance of products improves after moisture conditioning; after adjustment, take continuous samples to verify the effect, confirm stability before resuming mass production
Conclusión clave
The shortcoming of PA66 is at low temperature; cold-region applications must be verified at low temperature, toughened grades or PA6 substitution are the two ways out; after confirming effectiveness, fix the parameters and practices into the work instructions to prevent recurrence
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