Material Drying
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PET Preform Recycled Material Utilization
Problem Phenomenon
After blending crushed preforms, blowing haze increases and IV decreases.
Cause Analysis
Crushed preforms absorb moisture more severely and have one more heat history; an excessively high ratio lowers the overall IV.
Solution
①Reuse ratio control; ②re-dry crushed preforms; ③remove fine powder; ④monitor IV.
Key Takeaway
Preform reuse = ratio + drying + IV monitoring.
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