5~5~5~ Paper machine
 
načítání

Paper machine

 

Example of paper machine manufacturing fluting and liner grades


Reference parameters of the PM making liners and fluting

Paper grade: fluting, liner
Basis weight: 90 - 220 gsm
Paper width on reel: up to 6 000 mm



Packaging grades structure

Fluting
Basis weight: 70 to 180 gsm
Number of plies: 1-2

Testliner
Basis weight: 90 to 350 gsm
Number of plies: 2-3

White top liner
Basis weight: 90 to 300 gsm
Number of plies: 2-3

Kraft liner
Basis weight: 125 to 400 gsm
Number of plies: 2-3



 







Fluting/liner structure

 

Headbox
  • Even cross distribution
  • Optimum turbulence
  • Uniform web formation
  • Cross profile control
  • Pulsation dampening
3 headbox types:

1) Open headbox
2) Closed pressure headbox
3) Hydraulic headbox

Wire part
  • Gradual web formation and dewatering
  • Good interlayer bonding
  • Wire guiding and stretching
  • Wire cleaning
  • Quick wire exchange
Dewatering elements
  • Hydrofoil boxes
  • Vacuum-foil boxes
  • Vacuum boxes
  • Drainage elements tops  - ceramic (above 500 m/min.)
Top Former
  • Dewatering and quality improvement by means of Top Former
Press part
  • Efficient dewatering
  • Maximum runnability
  • Felt guiding and stretching
  • Felt cleaning
  • Quick felt exchange
Drying part
  • Efficient paper web drying
  • Energy efficient solutions
  • Easy threading
  • Guiding and stretching
Sizing

Size press
  • Starch consistencies 5 to 10 %
  • Starch basis weights 1.5 to 2.0 gsm each side
Fim press
  • Starch consistencies 9 to 15 %
  • Starch basis weights 1.4 to 4.0 gsm each side
  • Principle: starch is metered on the roll surface and then transferred to the paper in the nip
Calendering
  • Hard- or soft-calender with Thermo-roll and variable crown roll
Reeling
  • Automatic operation
  • Efficient reel turn-up system
  • Tension and nip pressure controls
  • Hydraulic reel
  • Spool overhead magazine and loader available
Rewinder

Optional Jumbo roll transfer rail from reel to unwind stand
  • Automatic operation
  • Quick threading
  • Winding tension and pressure control
Accessories
  • Sectional drives
  • Threading system
  • DCS & QCS
  • Control system
  • Hydraulic and pneumatic systems
  • Hood and ventilation system
  • Steam and condensate system