Processing Machinery
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PVDF Recycled Material Use Management
Problem Phenomenon
【Problem phenomenon】After blending PVDF regrind, product performance fluctuates, and chemical resistance and strength decline
Cause Analysis
Accumulated heat history of regrind reduces molecular weight and may mix in impurities; performance declines noticeably when the ratio is out of control; fluoroplastic regrind is valuable but must be finely managed; During on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based solely on experience
Solution
Dry regrind separately by batch and use within a limited ratio; prohibit or strictly limit regrind in critical performance parts; establish a regrind traceability and performance sampling system; After adjustment, take consecutive samples to verify the effect, and resume mass production only after confirming stability
Key Takeaway
PVDF regrind is highly valuable and needs finer management; ratio limitation plus sampling is the bottom line; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; Include this case in the defect archive as a reference for troubleshooting similar problems in the future
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