Production & Quality
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Regrind Proportion of PEEK Exceeding the Limit
Problem Phenomenon
[Problem Phenomenon] The quality of PEEK products blended with regrind declines, and the problem is more prominent for filled grades
Cause Analysis
Regrind increases heat history and cross-contamination risk, and high-temperature processing amplifies the influence of trace impurities; Victrex specifies regrind upper limits: 30% for virgin material, 10% for filled grades
Solution
Limit regrind to within 30% for virgin material and within 10% for filled material, dried separately; grind and sieve regrind to prevent foreign matter; prohibit regrind for critical performance parts; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Key Takeaway
PEEK regrind limits of 30% for virgin and 10% for filled are the official red line — exceeding them plants hidden dangers; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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