2003 6.6m DMT Five-Layer Co-Extrusion Film Line

DMT Five-Extruder, Five-Layer Co-Extrusion Cast Film Line

• — Manufacturer / supplier: DMT
• — Model / configuration: Five-extruder, five-layer co-extrusion cast film line dedicated to white product
• — Year of installation: 2003
• — Upgrades / modifications: Major 2012 upgrade increasing resin feed capacity and screen changer size
• — Line type: High-speed (HS) cast film line for white product
• — Capacity / throughput:
  • — Nameplate capacity: 14.9 KT
  • — Total extruder output: 5,900 kg/h
• — Line speed and web dimensions:
  • — Maximum film line speed: 390 mpm (mechanical design speed 390 mpm)
  • — Maximum width on winder: 6.6 m (single winder-width configuration)
• — Winding:
  • — Maximum roll OD on winder: 1,170 mm
  • — Mill roll winding system: contact type with closed-loop, step-wise movement control
  • — Core size: 450 mm cores
  • — Total cores: 64
• — Raw material handling:
  • — Line storage silos: 6 silos
  • — Total silo storage capacity: 600 tons
  • — Indoor storage bins: 12 bins at 4,536 kg each
  • — Feeding / dosing: K-Tron feeding/dosing system with main AEC batch blending for co-extrusion
• — Extrusion system:
  • — Total extruders: 5 extruders (five-layer co-extrusion)
  • — Main extruder: Mitsubishi cascade unit rated at 4,500 kg/h
  • — Primary screw (main extruder): 200 mm, 17.1 L/D
  • — Secondary screw (main extruder): 250 mm, 20.3 L/D
  • — Intermediate extruders: two Mitsubishi 150 mm, 33 L/D units for bath and caster internal tie layers, 550 kg/h each
  • — Skin-layer extruders: two Mitsubishi 75 mm, 33 L/D units for bath/air-knife side and caster external layers, 150 kg/h each
• — Die and casting:
  • — Die type: EDI 5-layer die
  • — Die width: 1,000 mm
  • — Chill roll width: 2,150 mm
  • — Cast film thickness gauging: EGS Strontium 90 system
• — MDO (Machine Direction Orientation):
  • — Preheat rolls: 16 rolls
  • — Stretch rolls: 5 rolls
  • — Annealing rolls: 4 rolls
• — TDO (Transverse Direction Orientation):
  • — Preheat section length: 24 m
  • — Stretch section length: 16 m
  • — Annealing section length: 12 m
  • — Chain-track system: DMT monorail chain-track
• — Film gauging and control:
  • — Cast film thickness gauging: EGS Strontium 90 system
  • — Final film thickness gauging: EGS scanner feedback control system with auto flex die
• — Surface treatment: Softal corona treatment units fitted top and bottom