Extrusion & Post
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LDPE Casting Chill Roll
Fenómeno do problema
LDPE cast film adheres poorly to the roll and transparency is poor.
Análise das causas
Improper chill roll temperature or poor air knife attachment gives poor film surface cooling state; During on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience; This mechanism has been repeatedly verified by industry literature and should be confirmed first during troubleshooting.
Solução
Chill roll temperature 20-40℃; optimize air knife pressure and angle; roll surface cleaning; 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.
Conclusão principal
Cast film roll attachment is controlled by roll temperature and air knife; After confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; Incorporate this case into the defect archive as a troubleshooting reference for similar future problems.
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