Brückner 3 layers BOPP / BOPET tenderframe plant

Number of layers 3
Film structure ABC
Output speed 425 m/min. 4000kg/h ant 25my ; 3800 kg/h at 20 my; 2854 kg/h at 15 my, 2285 kg/h at 12my
Width (mm) 8200
Extruder 1 Description A
Extruder 2 Description B, twin screw
Extruder 3 Description C
Die width Automatic die, flex lip and thermal baths automatic adjustment
Chill roll unit Chill roller in water bath, diameter 1350mm
MDO description Stretching ratios: 1:1 - 1:7
TDO description Stretching ratios 1:8 - 1:10
Rewinder description Turret winder
Slitter Atlas, center driven winder with independent arms.
12 independent winding stations

Biaxially oriented polypropylene (BOPP) and Biaxially oriented polyester (BOPET) are commonly produced in tender-frame lines.
In these lines material is melted through a
flat extrusion die (T-die) and solidified onto a cooled roller.
Material is then stretched in machine direction in an MDO.
Thereafter material is stretched in transversal direction in a TDO.
These processes deliver a molecule orientation in both axes,
this enhances many of their properties,
particularly the mechanical, impact, barrier and optical properties.