Material Drying
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PAI product bubbles and pores
Problem Phenomenon
Severe bubbles in PAI injection molded products cause performance to be substandard
Cause Analysis
Insufficient drying, moisture content exceeding the standard (requires 150°C/4-6h); at processing temperatures of 340-380°C, moisture vaporizes
Solution
Strictly dry to moisture content <0.05%; use a vented screw; increase holding pressure
Key Takeaway
PAI is extremely sensitive to moisture
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