Material Drying
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PBT vs PA Comparison
Fenómeno del problema
Material selection between PBT and PA66 is a dilemma, and the dimensional stability requirements in humid environments are different
Análisis de la causa
PBT has small water absorption and stable dimensions, and its electrical performance barely changes in humid environments; PA66 absorbs much water and its wet-state performance drifts; PBT's toughness and hydrolysis resistance are inferior to modified PA; select according to humidity and toughness requirements
Solución
①Select PBT for humid precision electrical parts; ②Select toughened PA for high toughness requirements; ③Hydrolysis resistance requirements both need dedicated grades; after adjustment, take samples continuously to verify the effect, and resume mass production only after confirming stability
Conclusión clave
PBT's core advantage over PA is wet-state dimensional stability; the material selection balance for electrical precision parts tips toward PBT; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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