Material Drying
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PET Preform Missing Moisture Verification
Fenómeno do problema
The process has not changed but hazy bottles appear intermittently.
Análise das causas
Dryer dew point drift, molecular sieve failure or dehumidification system failure; environmental humidity changes make the drying capacity insufficient.
Solução
①Dew point online monitoring and alarm; ②regular regeneration/replacement of molecular sieves; ③clean the drying filter and air duct; ④strengthen verification in high-humidity seasons.
Conclusão principal
Intermittent haze = drying system state drift.
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