Effect of specified edge load on Eucalyptus globulus paper properties

conferenceObject

Peralta, C.
Piçarra, E.
Santos, A.
Simões, R.
Anjos, O.

Fernando Caldeira Jorge

PERALTA, C. [et al.] (2006) - Effect of specified edge load on Eucalyptus globulus paper properties. In ECOWOOD 2006 - International Conference on Environmentally Compatible Forest Products , 2 - Proceedings. [S.l. : s.n.]. p. 499-505.

Effect of specified edge load on Eucalyptus globulus paper properties

Specified edge load
Energy consumptions
Eucalyptus globulus
Paper potential

2014-03-07T15:16:15Z
2014-03-07T15:16:15Z
2006

Refining is an important unit operation in the paper production process and consists in the mechanical beating of the pulp fibres in an aqueous medium. The refining conditions affect fibre morphology, pulp suspension characteristics and paper properties. In this study we investigated the effect of refining intensity - given by the specific edge load (SEL) - on the fibre and paper properties. Lower refining intensity led to lower fibre cutting, lower fines generation, and lower ºSR development. Commercial Eucalyptus globulus bleached pulp was refined in a pilot refiner, using different specific edge loads (0.05; 0.1 and 0.2 J/m) and specific energy consumption of 40, 80 and 120 kWh/ton in order to evaluate paper potential. The highest specific edge load tested (0,2 J/m) resulted in a lower average fibre length, as a result of a higher fibre cutting. The papers produced presented higher mechanical resistance, but increasing refinement energy from 80 to 120 kWh/ton did not improve paper properties. On the contrary, with a lowest specific edge load (0,05 J/m), the papers obtained for different specific energy consumption exhibited lower density (i.e., higher open structure, higher air permeability and lower smoothness).

openAccess

eng