Addex blown film extruder
|Machine||Addex blown film extruder|
|Type of extruder||Blown|
|Number of layers||3|
|Diameter die||1200 mm|
|Lip opening||1,6 mm|
|Diameter screw(s)||120 mm (x3)|
|L/D ratio screw(s)||30:1|
|Material & Min – Max thickness||LDPE, LLDPE, mLLDPE, MDPE, EVA,
40 - 300 microns
|Max. film width||6000 mm|
|Max. output||1100 kg/hour|
|Type of screen changer||Hydraulic|
|Thickness measurement||Yes, Kundig|
|Tower construction included||No|
|Other information||Winder, tower and dosing system not included|
|Including||Extruders, screenchangers, die, air ring,
IBC, bubble cage, flatteners,
gusset boards, nip unit, secondary folding unit, path rollers
|Special characteristics||Designed for agri films for silage and greenhouses.|
|Available from||July 2016|
|Machine can be seen in production?||Yes|
Extrusion in the flexible packaging industry can roughly be devided in three kinds of extrusion: blown film extrusion lines, cast film extrusion lines and BOPP extrusion lines.
Blown Film Extrusion
Blown film extrusion is the most common technology to produce plastic film. Blown film extrusion is typically carried out upwards vertically.
Film is made out of polymer material. These polymeres are generally in the form of granulate. This material is melted and then forced or extruded through a die. Air is blwon thourgh a hole in the center of the die. This pressure causes a bubble. This bubble is a thin layer of film. The film is pulled upwards from the die to cool down and winded on the a roll.
Blown film extrusion exists in various layers, the more layers the thicker the film. The process with more layers is called coextrusion.
- 3 layer
- blown film