Mechanical Pulping

The Szego Mill has been used to refine thermally and chemically softened wood chips and thermally treated hemp into mechanical pulp for papermaking. Paper quality is good and energy consumption is lower than for disk refiners.

Szego Mill pulp properties

  Freeness (mL) Avg fibre length (mm)
 Hemp 125 – 638 0.85 – 1.28
 Black spruce 130 – 619 0.67 – 1.16

Properties of paper made with Szego Mill pulp

  Density (kg/m3)Tear Index (mN-m2/g)
Paper from hemp and kraft pulp 247 – 592 3.21 – 8.23
Paper from black spruce pulp 375 – 575 3.93 – 6.55