Blow Molding
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PPS vs. PEEK Comparison
Problem Phenomenon
Selection between PPS and PEEK for high-temperature parts is a dilemma; performance and cost are hard to balance
Cause Analysis
PEEK is superior to PPS in heat resistance, toughness, and wear resistance but costs several times more; PPS is comparable in chemical resistance and flame retardancy but more brittle; below 200°C, PPS wins on cost-performance
Solution
①Prioritize PPS for rigid parts below 220°C; ②Select PEEK for high toughness, high wear resistance, or ultra-high temperature; ③Evaluate by full lifecycle cost; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Key Takeaway
The watershed between PPS and PEEK is temperature and toughness; below 220°C, PPS is the king of cost-performance; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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