Co. Au et Ka. Johansson, THE USE OF CATIONIC STARCH AND ANIONIC COLLOIDAL SILICA IN WASTE - HIGH CATIONICITY STARCHES IMPROVE FIXATION, Pulp & paper Canada, 94(6), 1993, pp. 55-58
Disturbing substances such as calcium ion and non-ionic starch were fo
und to be detrimental to the performance of wet end chemicals. By usin
g a new generation of cationic starch in conjunction with an anionic c
olloidal silica, these detrimental effects were minimised. Results of
both laboratory work and full scale machine trial are presented. A the
ory to explain the mechanism of these starches is also proposed.