Material Drying
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PLA Sheet Extrusion Moisture
Problem Phenomenon
PLA sheet extrusion has many bubbles and embrittlement, and ordinary drying systems cannot meet the requirements
Cause Analysis
PLA sheet extrusion requires moisture <50ppm, with extremely high requirements for drying and temperature control systems; the thickness is generally only 0.2-1.0mm; it needs to be processed on modified advanced PET extruders
Solution
①Sheet extrusion moisture control <50ppm; ②Use a PET-type extrusion line with deep dehumidification; ③Design the thickness per the 0.2-1.0mm window; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Key Takeaway
PLA sheet extrusion is the ultimate challenge of drying capability; the 50ppm red line determines the equipment threshold; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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