Processing Machinery
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PVC Regrind Odor
Problem Phenomenon
PVC products blended with regrind have a noticeable odor
Cause Analysis
Recycled material has accumulated heat history, the stabilizer is consumed and degradation products remain; During on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based solely on experience; This mechanism has been repeatedly verified by industry materials, and it should be confirmed first during troubleshooting
Solution
Regrind ratio control; supplement stabilizer; prohibit regrind in odor-sensitive products; After adjustment, take consecutive samples to verify the effect, and resume mass production only after confirming stability; Change only one variable at a time and record parameter changes, so as to locate effective measures
Key Takeaway
Regrind odor is controlled by ratio and stabilizer; 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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