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TECHNICAL:

FRACTIONATION OF BAMBOO PULP – WAY TO IMPROVE PAPER STRENGTH

Tripathi S., Sharma N., Mishra O.P., Chakrabarti S.K. and Varadhan R. Thapar Centre for Industrial Research and Development, Yamuna Nagar, India

Fibre fractionation followed by selective processing of each fraction appears to be a better option for producing paper of improved quality. In this study, bamboo pulp was fractionated in to long fibre fraction (+48 mesh), short fibre fraction (-48, +200 mesh) and compared with the as such (un-fractionated) pulp. Kappa number of long fibre fraction pulp was significantly lower and viscosity was higher than the as such pulp. Bleachability of fractionated pulps was better as compared to the as such pulp. Long fibre pulp fraction required ~ 31% less chlorine, 15% less hypo and 7% less chlorine dioxide to bleach the pulp to 88% ISO brightness as compared to the un-fractionated pulp. Tensile strength and bursting strength of long fibre fraction pulp was 7-30% higher and tearing strength was 18-27% higher than the as such pulp.

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