Material Drying
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PBT injection molded product dimensions change with ambient humidity
Fenómeno del problema
The dimensions of PBT products change in humid environments, and the insertion and extraction force of electrical connectors fluctuates.
Análisis de la causa
Although PBT has a low moisture absorption rate (<0.1%), it still has a certain moisture absorption expansion in high-humidity environments, and the product thickness and shape affect the dimensional change.
Solución
Use glass fiber reinforced PBT to reduce moisture absorption expansion; conduct environmental testing and verification on key dimensions; use alternative materials such as PPS when necessary.
Conclusión clave
Although PBT moisture absorption expansion is not large, precision applications still need attention.
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