Material Drying
6 Aufrufe
PET Preform Recycled Material Utilization
Problembeschreibung
After blending crushed preforms, blowing haze increases and IV decreases.
Ursachenanalyse
Crushed preforms absorb moisture more severely and have one more heat history; an excessively high ratio lowers the overall IV.
Lösung
①Reuse ratio control; ②re-dry crushed preforms; ③remove fine powder; ④monitor IV.
Wichtigste Erkenntnis
Preform reuse = ratio + drying + IV monitoring.
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