W&H 3 layer extrusion line

E18006

Machine	W&H 3 layer extrusion line
Reference number	E18006
Machine manufacturer	W&H
Model	Varex
Type of extruder	Blown
Year	2008
Number of layers	3
Diameter die	500 mm
Lip opening	2,2 mm
Diameter screw(s)	2 x 70 mm 1 x 90 mm
L/D ratio screw(s)	1:30
Material & Min – Max thickness	LLDPE/LDPE/HDPE/PP/Borstar/ Matalocen/Borcene /recyling
Max. film width	2600 mm
Min. – Max. film thickness	20 - 200 micron
Max. output	850 kg/hour
Rewind manufacturer	W&H Filmatic S
Rewind type	Back-to-Back
Max. rewind reel diameter	1200 mm
Rotating, which part	Take off
Dosing unit	INOEX Raw Material suction, loading and dosing systems Computerized gr/m2 line speed and kgh throughput Control system with integrated supervisory computer
IBC	Yes
Thickness measurement	Yes, Kundig
Edge guide(s)	Yes
Corona treater	Yes, AFS
Including	- Cooling ring: Multicool airing 2800 - VAREX PROCONTROL supervisory data computer

Subject to unsold. Although believed to be correct, the machine specifications and lists supplied are based solely upon those provided by the original owners.

Extruders
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.