Material Drying
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PVC Color Masterbatch Handling
Fenómeno del problema
PVC products with color masterbatch show bubbles and color difference
Análisis de la causa
Masterbatch carrier absorbs moisture or poor compatibility with PVC, poor dispersion; 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
Choose PVC-dedicated masterbatch; masterbatch dried; dispersion effect verified; 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 masterbatch needs dedicated type, drying plus dispersion verification; 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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