Rotomec Extrusion laminating line
|Machine||Rotomec Extrusion laminating line|
|Type of extruder||Extrusion-laminating|
|Number of layers||Mono|
|Lip opening||0,5 - 0,8 mm|
|Diameter screw(s)||150 mm|
|Max. film width||1750 mm|
|Max. rewind reel diameter||1400 mm|
|Corona treater||Yes, 3 total (2 pre-treatment, 1 post-treatment)|
|Other information||Several upgrades between years 2000-2005|
|Including||Primary unwinder for main substrate
Paper 20 – 200gsm
Board 250 – 350gsm
Diameter 1250 mm
Unwinder for lamination
Alufoil, Pet, PP, Gread
Diameter 800 mm
Secondary unwinder for sandwich lamination
Diameter 1200 mm
3 chill rolls
Matt, Gloss, Semi-matt
System autodie Bolt from Protagon
|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.
Cast Film Lines
In the process of cast extrusion polymer travels through a flat die system. For mono-layer extrusion only the die is required. For co-extrusion besides the die you need also aa feedblock.
The extruders melt and mix the material, they filter it and i t will be be fed to the die system. The molten curtain enters the cooling unit directly after leaving the die. A roll cooled by water will freeze the film.
The edges will be trimmed and when required corono treatment is applied. The last stage of the process is winding the film onto rolls.
Rotomec is part of the Bobst Group since 2006. Bobst produces rotogravure printing presses under the name of Rotomec.