Material Drying
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Silver streaks and bubbles in products due to insufficient pellet drying
Fenómeno del problema
Injection and extrusion products show silver streaks and bubbles, transparency decreases, and mechanical properties decrease
Análisis de la causa
Moisture absorption is 0.04%, but the high processing temperature causes hydrolysis
Solución
Dehumidifying drying at 120-130C for 4-6h, dew point <-30C
Conclusión clave
Sufficient drying is required before processing
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