Preliminary Experiments with Improved Hypochlorite Bleaching of Bamboo Pulps

摘要

Investigations were carried out to find out the degradation of bamboo pulp (especially tearing strength) in the Hypocholorite stage of the CEHH sequence by determining the viscosity and fiber strength index. Attempts have been made to retain the strength by replacing 20% chlorine by hypochlorite in the chlorination stage while attaining a brightness of 68% ISO with 12% chlorine in the H 1 stage. Considerable improvement in tear strength was observed using the H/C (20:80) EHH sequence over the conventional CEHH sequence in the case of bamboo (Dendrocalamus strictus) pulp of a low Kappa number. The behavior of a commercial flash-dried bamboo pulp of a high Kappa number was observed to be difficult.