3 layers BRUCKNER BOPP / BOPET extrusion machine
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.
| Machine Code | BO57 |
| Manufacturer | BRUCKNER |
| Year | 1988 |
| Number of layers | 3 |
| Overhaul/renovation | several |
| Film structure | A B C |
| Material | BOPP |
| Output | 2500 kG / H |
| Width (mm) | 7400 |
| Extruder 1 Description | 1 X 200 MM diam L/D 21 + 1 sequence 1 x 250 L/D 20 |
| Extruder 2 Description | 1 x90 coex |
| Extruder 3 Description | 1 x 90 coex |
| Head description | 7 heating zones - 45 Kw heating power - lips 1,7 - 3,5 mm |
| Die width | 1054 mm |
| Thickness controll system | automatic by 37 heating bolts Two thickness controls new by Electronic system |
| Chill roll unit | width 1400 mm diam 2.400 mm |
| MDO description | pulling unit thermo heated calenders, rollers width 1200 mm, MDO ratio 1: 1/ 10:1- slow section 2 x 60 m/ min ;high speed section 9 x 250 m/min, Preheating calenders 18 , 6 pulling rollers , 2 stabiizing rollersn |
| TDO description | Max stretchin width 8500 mm, effective max width capacxity 6700 - 7500 mm, 7 heating zones by air blowers and thermo oil heaters |
| Corona treatment | yes two corona treaters |
| Flame treatment | Yes |
| Rewinder width | 7200 mm |
| Rewinder description | Diam mandrels 450mm.Lenght mandrels 7800mm. Winding speed 250m/min. Tension film 150/700N. 2 alternating winding stations |
| Slitter | year 1988, 7200 max width film; Diam unwinder 1000mm - 900 diam rewinder. 200 mm min cut. 2000mm max cut. Speed 800m/min |
| Additional information | Trim exhausting grinding and recirculating unit |
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