Material Analysis
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Additive Precipitation of PBT
Problembeschreibung
After long-term storage of PBT products, white powdery precipitates appear on the surface.
Ursachenanalyse
Additives (slip agents, antioxidants, etc.) have limited solubility in the matrix and migrate to the surface over time and precipitate (blooming).
Lösung
Control the amount of additives within the solubility range; use high molecular weight additives to reduce the migration rate.
Wichtigste Erkenntnis
PBT precipitates affect appearance and electrical properties.
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