Material Drying
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PA66 low-temperature impact shortcoming
Problem Phenomenon
PA66 parts used in cold regions fracture brittlely at low temperature, yet the same grade passes testing at normal temperature
Cause Analysis
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
Solution
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
Key Takeaway
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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