MFC Case Study: FBB Outer Ply

MFC Grinder Case Study: MFC in Folding Box Board (FBB) Outer Ply

Filler increase and chemical pulp reduction

Background

  • Coated FBB grade
  • 2.25% MFC added to both outer layers
  • Outer layer filler content increased
  • Grammage redistributed from outer layers to middle layer
  • MFC produced using FiberLean G250 grinder with eucalyptus pulp

Trial Objectives

  • Increase filler content in outer layers
  • Reduce chemical pulp usage
  • Maintain stiffness and brightness
  • Improve surface properties

Trial Results

MFC Case Study: FBB Outer Ply
MFC Case Study: FBB Outer Ply

Trial Outcomes

  • 2.25% MFC added to both outer layers
  • +10% filler in each outer layer
  • Top layer grammage reduced by 4 g/m2
  • Back layer grammage reduced by 3 g/m2
  • Middle layer grammage increased by 7 g/m2
  • 18% reduction of chemical pulp use
  • Maintained stiffness and brightness
  • Significantly improved smoothness

Business Impact

Estimated 10–20 EUR/t cost saving through fibre reduction and filler substitution

Key Takeaway

MFC enables higher filler loading and an 18% reduction in chemical pulp, while maintaining stiffness and brightness and improving surface smoothness.

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