Material Drying
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PBT Automotive Parts
Problem Phenomenon
PBT parts around the automobile engine undergo high-temperature aging, or hydrolyze and fail in humid environments
Cause Analysis
After glass fiber reinforcement, PBT can work long-term at 140°C; heat-resistant grades are needed around the engine; hydrolysis-resistant grades are needed in humid environments; chemical resistance is suitable for automotive fluid contact
Solution
①Select glass fiber reinforced heat-resistant grades for engine surroundings; ②Select hydrolysis-resistant grades for humid parts; ③Do thermal aging and damp-heat verification according to working conditions; after adjustment, take samples continuously to verify the effect, and resume mass production only after confirming stability
Key Takeaway
PBT automotive applications are selected by zone according to temperature and humidity; heat-resistant and hydrolysis-resistant grades each have their own territory; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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