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 2006
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.

 

  • Extruder
  • W&H
  • Coex
  • blown
  • Varex
  • E18006
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