Production & Quality
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Yellowing of Natural-Color PBT Products During Storage
Problembeschreibung
White or natural-color PBT products turn yellow after being stored in the warehouse for several months.
Ursachenanalyse
The antioxidants in PBT are gradually consumed, and oxygen and ultraviolet rays in the air slowly oxidize it, causing yellowing; high storage temperature accelerates this.
Lösung
Use a high-efficiency antioxidant formulation; store sealed away from light; control the storage temperature <30°C.
Wichtigste Erkenntnis
PBT yellowing during storage is the result of slow oxidation.
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