Case Study White Top Liner

MFC Grinder Case Study: MFC in White Top Liner

Filler increase & lightweighting (white layer)

Background

  • 120 g/m² two-layer recycled white top liner
  • Initial: 38 g/m² white layer, 20% filler in white layer, no MFC in white layer
  • With MFC: 42 g/m² white layer, 44% filler, 6% MFC
  • MFC produced using FiberLean G250 grinder

Trial Objectives

  • Increase filler content in the white layer
  • Reduce fibre consumption
  • Maintain mechanical properties and runnability
  • Improve surface appearance

Trial Results

Case Study White Top Liner

Trial Outcomes

  • 6% MFC in top layer, +24% filler in top layer, +4 g/m² basis weight in top layer
  • 20% reduction of white layer fibre consumption
  • Brightness increased by 1% (abs. Units)
  • Calmer / less mottled surface
  • Mechanical properties maintained
  • Process parameters unchanged

Business Impact

Estimated 10–20 EUR/t cost saving with improved visual quality.

Key Takeaway

MFC enabled a 20% reduction in white layer fibre while increasing filler and improving surface quality – with no process disruption.

CLICK TO DOWNLOAD CASE STUDY PDF