Material Analysis
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Additive Precipitation of PBT
Fenómeno del problema
After long-term storage of PBT products, white powdery precipitates appear on the surface.
Análisis de la causa
Additives (slip agents, antioxidants, etc.) have limited solubility in the matrix and migrate to the surface over time and precipitate (blooming).
Solución
Control the amount of additives within the solubility range; use high molecular weight additives to reduce the migration rate.
Conclusión clave
PBT precipitates affect appearance and electrical properties.
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