Material Drying
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Drying Management for PESU High Water Absorption
Problem Phenomenon
【Problem Phenomenon】PESU products have dimensional and strength problems, and tracing found that drying was underestimated
Cause Analysis
PESU's saturated water absorption of about 2.1% is relatively high among sulfones, and it must be thoroughly dried before molding, otherwise dimensions and strength are affected; the impression of low moisture absorption led to insufficient drying investment
Solution
Execute PESU drying according to official high-grade parameters and actually measure moisture content; sealed management after drying with time-limited use; include moisture records of dimension-sensitive parts in traceability; after adjustment, continuously sample to verify the effect, confirm stability before resuming mass production
Key Takeaway
PESU's 2.1% water absorption cannot be underestimated, thorough drying is the prerequisite for dimensions and strength; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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