Secondly, factors influencing charge decay of pulp slurry suspension, such as stirring rate, pulp species, adding amount of polyelectrolyte, adding amount of cationic polymer etc. were discussed.
The effects of the three main process variables(time, temperature and thiourea dioxide charge)on thiourea dioxide(TD)bleaching of pulp from recycled old newspaper were studied.
The feasibility and mechanism of action of using attached agent in anionic rosin under the neutral papermaking condition are analyzed from the inner charge lager of pulp.