Production & Quality
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PPS regrind degradation
Problem Phenomenon
PPS recycled material oxidatively crosslinks after multiple regranulation and becomes unusable.
Cause Analysis
During multiple high-temperature processing, PPS gradually oxidatively crosslinks, turning black and brittle.
Solution
Limit reuse times to 1-2; do not set recycling granulation temperature too high.
Key Takeaway
Use of PPS recycled material requires great caution.
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