Samples of refined wheat straw fibres were analyzed in the
PQM-1000 fibre classifier system. The fibre properties from all
the separate trials (RA to RD) are presented in Table 4.
The fibre length distribution was homogenous in all the
trials. Varying the amounts of hydrogen peroxide and calcium
chloride had no major effect on fibre length, width or curl.
The homogenous fibre quality reflects constant defibration
processing conditions throughout the process. These conditions
were maintained by an even input and control of the
raw material feed. The average length of the straw fibre was
approximately 1.1mm and the average width was around
25–26m. The fibre curl indexwas constant (7%) and the mass
per length property (coarseness) increased with higher doses
of H2O2.