Investigation on NSSC Pulp Obtained from Second-Growth and Original Stem of Eucalyptus camaldulensis in Jiroft Region

This study was conducted to investigate the properties of NSSC pulp from seed original stem and second-growth of Eucalyptus camaldulensis. Cooking conditions were as follow: time 30, 60 and 90 minutes, Temperature 165˚C and L/w: 6/1. Na2SO3 and NaHCO3: 15% and 7% based on OD weight of wood, respectively. In this study fiber dimension and chemical compositions of woods were determined. The pulps were refined to reach the target freeness value (400ml, CSF). Then, hand sheets were made and tested. The average pulp yield for seed original stem wood was higher than the second-growth wood. The results of the strength properties indicate that all properties of the pulp produced from seed original stem in the same condition are higher than those of the pulp of the second-growth wood, but there was no significant difference between them. However, regarding to the results in terms of fast-growth, higher pulp yield and lower refining energy required to reach the proper freeness value, make the second-growth wood as suitable as the seed original stem wood in pulp and paper industry.