Windmoller & Holscher VAREX 3-layers Blown film extrusion line 1800mm of year 2006

Number of layers 3
Film structure ABC
Material LDPE, LLDPE, MDPE
Film Width (mm) 1800
Output (Kg/h) 350Kg/h
Extruder 1 Layer ref: A
Screw diam 60mm
Description Gravimetric doser Doteco 5 comp
Extruder 2 Layer ref: B
Screw diam 90mm
Description Gravimetric doser Doteco 5 comp
Extruder 3 Layer ref: C
Screw diam 60mm
Description Gravimetric doser Doteco 5 comp
Die diam (mm) 250
Thickness controll system Thickness gauge Kundic control OPTIFIL P3
Bubble cage yes. Utlasonic sensors for width control
Panel for gussets yes
Take off unit Fixed
Corona treatment CASON
Rewinder description Width 1800mm
In a blown film extruder PE granulates (or other polymer) are melted in an extruder and pushed through a circular die extruding a tube of molten polymer.
Tube is then inflated to multiples of its initial diameter and cooled to form a thin film.
Bobble is later collapsed and re-winded.