Processing Machinery
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PVC Soft Product Plasticizer Exudation
Fenómeno del problema
Soft PVC product surface oily and sticky, affecting appearance and use.
Análisis de la causa
Insufficient compatibility of plasticizer with PVC or excessive amount; high temperature accelerates migration; plasticizer migrates to surface forming oil layer; during on-site troubleshooting, verify item by item according to this mechanism, avoid blindly adjusting the machine based solely on experience.
Solución
①Switch to plasticizer with better compatibility with PVC; ②Control additive dosage to avoid excessive exudation; ③Evaluate using high-molecular plasticizers with slow migration; ④Control use environment temperature to reduce migration exudation; ⑤Do additive exudation test evaluation.
Conclusión clave
PVC soft material oiling = 'plasticizer compatibility': compatibility and dosage are key; high-molecular plasticizers migrate slowly, the upgrade direction for preventing oiling; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence.
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