Material Drying
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Sticking of PET during drying
Fenómeno do problema
PET pellets stick and agglomerate in the dehumidifying dryer, cannot discharge normally.
Análise das causas
Drying temperature set too high (exceeding PET softening point), temperature control system failure, material stays too long in high-temperature zone, amorphous PET low softening.
Solução
Strictly control drying temperature ≤175°C; calibrate temperature control; avoid long residence (>8h); pre-crystallize amorphous PET first.
Conclusão principal
PET drying sticking requires strict control of temperature and residence time.
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