Material Drying
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PAEK product bubbles/internal pores
Problem Phenomenon
Internal bubbles appear in PAEK injection molded products, affecting mechanical properties
Cause Analysis
Insufficient drying, moisture content exceeding the standard (PAEK requires 150-180°C/2-3h drying); at processing temperatures of 350-400°C, trace moisture vaporizes sharply
Solution
Strictly dry to moisture content <0.02%; reduce screw speed; increase holding pressure time and pressure
Key Takeaway
PAEK is similar to PEEK in that trace moisture causes bubbles at extremely high processing temperatures
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