Extrusion & Post
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PVC Soft Extrusion Temperature
Fenómeno del problema
Soft PVC after extrusion shows plasticizer exudation, surface greasy, performance decline
Análisis de la causa
Soft PVC processing temperature 130-170℃, lower than rigid; too high temperature causes plasticizer volatilization and exudation, surface greasy and material hardens; temperature window needs adjustment by plasticizer content
Solución
①Soft PVC temperature 130-170℃; ②Prevent local overheating causing plasticizer loss; ③When exudation severe, check formula and temperature matching; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Conclusión clave
Soft PVC temperature management must also protect plasticizer; overheating loses not only appearance but also flexibility; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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