Improving the bending stiffness of multi-ply folding boxboard with maple HYP

BCTMP (Bleached chemi-thermo-mechanical pulp) or HYP (high-yield pulp) is an important

sector in the Canadian market pulp business, and most of them has been exported to Europe

and Asia and over half of it is used as middle-ply furnish in Folding Boxboard (FBB). FBB

requires high bending stiffness for crush resistance, z-directional strength for preventing delamination,

surface smoothness for good printing, and good die-cutting performance for

conversion. Maple HYP has been known to be the premium pulp in the middle ply of FBB

since it has a very high bulk. In this project, we will determine the difference in fiber stiffness

and compressibility as well as bulk formation mechanism between maple and eucalyptus

HYP. This will help identify the potential advantages of using maple in FBB and develop

practical strategies to maximize the contribution of maple HYP to bulk and bending stiffness

as well as other properties of FBB.

Faculty Supervisor:

Yonghao Ni

Student:

Partner:

FPInnovations (Pointe-Claire, QC);Tembec Inc (Temiscaming, QC)

Discipline:

Engineering

Sector:

Manufacturing

University:

University of New Brunswick

Program:

Accelerate

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