Material Drying
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Silver streaks and bubbles in products due to insufficient pellet drying
Problem Phenomenon
Injection and extrusion products show silver streaks and bubbles, transparency decreases, and mechanical properties decrease
Cause Analysis
Moisture absorption is 0.04%, but the high processing temperature causes hydrolysis
Solution
Dehumidifying drying at 120-130C for 4-6h, dew point <-30C
Key Takeaway
Sufficient drying is required before processing
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