Molding Process
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PEEK product improper post-crystallization heat treatment
Problem Phenomenon
Post-crystallization treatment instead causes performance decline or poor effect
Cause Analysis
Heat treatment temperature not high enough or time insufficient, crystallinity not reaching the target; temperature too high causing thermo-oxidative degradation; heating/cooling rate too fast introducing new internal stress
Solution
Post-treatment temperature 200-250°C held for 2-4 hours; perform in nitrogen or vacuum protective atmosphere to avoid oxidation; slow heating and cooling <3°C/min
Key Takeaway
Post-crystallization heat treatment is a necessary process step to compensate for insufficient crystallization during processing
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