Processing Machinery
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PVC Soft Material Oil Spots
Fenómeno del problema
Soft PVC product surface exudes oil and becomes sticky
Análisis de la causa
Plasticizer migrates and exudes—a formulation compatibility or temperature history problem; during on-site troubleshooting, verify item by item according to this mechanism to avoid blindly adjusting the machine based only on experience; this mechanism has been repeatedly verified by industry data and should be confirmed first during troubleshooting
Solución
Select a plasticizer system with good compatibility; control processing temperature; manage storage temperature; after adjustment, continuously sample to verify the effect, and resume mass production after confirming stability; change only one variable at a time and record parameter changes to facilitate locating effective measures
Conclusión clave
Oil exudation of soft material is plasticizer migration, and formulation is the root; 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 in the future
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