Improving paper breaking length using cellulosic nanofibers in bagasse pulp

Pars paper factory adds imported long fiber pulp which is made from softwoods to its bagasse pulp to reinforce the paper strength, thereby incurring high expenses to this factory. This research aimed to assess the replacement of different systems of additives (cationic starch-bentonite, cellulose nanofibers-cationic starch, cellulose nanofibers- cationic polyacrylamide) with long fiber pulps, while keeping the paper breaking length to the extent of adding 15% imported long fibers. The results showed adding 1 percent cationic starch leads to enough breaking length, but according to possible process problems adding lesser amount of starch (0.75 %) with 3 % cellulosic nanofibers was also investigated, which could attain suitable paper breaking length. In addition, a treatment without starch but with 7.5 % cellulosic nanofibers and 0.03 % cationic polyacrylamide could also reach to an equivalent breaking length of adding 15 % long fiber pulp. Furthermore, adding bentonite with cationic starch to bagasse pulp resulted in a little improvement in pulp drainage.