The yield, the strength, etc. of pulps prepared by SOX, Mg-SP, NSSC, KP, AP, RMP, and lime pulping process from the same lot of bagasse (without depithing) were compared. An improvement of the strength and/or brightness of bagasse pulp prepared by SOX process (SOXP) was attempted by blending unbleached and bleached kraft pulp prepared from soft wood (NUKP and NBKP) in it.
Maximum yields of baggsse pulps obtained by those process are 73.2% (SOX), 74.8% (AP), 68.7% (lime pulping), and 83.6 (RMP). The breaking length, burst factor, and tear factor of SOXP at the yield of 62.4% were 3.4 km, 1.5, and 27, respectively. The breaking length, burst factor, and tear factor of KP at the yield of 41.1% were 7.1 km, 4.5 and 48, respectively.
The strength of SOXP was remarkable improved by blending NUKP and or NBKP in it. The paper and paperboard made from SOXP are considered to be applicable to packing materials.
