Material Drying
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PVC Recycled '2079851475616104451
Fenómeno del problema
PVC products with recycled material show increased bubbles and degradation points
Análisis de la causa
Recycled material contains water and heat history accumulated, stabilizer partially consumed; during on-site troubleshooting, verify item by item according to this mechanism, avoid blindly adjusting the machine based solely on experience; this mechanism has been repeatedly verified by industry data and should be confirmed first during troubleshooting
Solución
Recycled material dried separately; blending ratio controlled; add stabilizer; downgrade use; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability; change only one variable at a time and record parameter changes to facilitate locating effective measures
Conclusión clave
PVC recycled material needs drying plus stabilizer compensation; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for similar problems later
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