Material Drying
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PETG '2079851475616104458 sheet bubbles after moisture absorption
Problem Phenomenon
PETG sheets produce bubbles during '2079851475616104458 heating, and the products are scrapped.
Cause Analysis
The sheet absorbs moisture during storage (humid environment), and at '2079851475616104458 temperature the moisture vaporizes and expands forming bubbles.
Solution
Pre-dry the sheets before use at 60-65°C/2-4h; store in a dry environment <40%RH; store unused sheets in a dehumidifying drying box.
Key Takeaway
PETG hygroscopicity requires strict storage and pre-drying management.
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