Extrusion & Post
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PET extruded cast film sticking to the roll
Fenómeno del problema
PET cast film sticks severely to the cooling roll and cannot be peeled off normally, producing transverse marks.
Análisis de la causa
Cooling roll temperature is set improperly (on the low side); adhesion between the cast film and the roll surface is too large; roll surface roughness is unsuitable.
Solución
Adjust cooling roll temperature to 20-40°C; use chrome-plated mirror-polished cooling rolls; appropriately reduce melt temperature; use electrostatic pinning assistance.
Conclusión clave
PET cast film roll sticking is a matching problem between surface characteristics and roll surface conditions.
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