Date of Award
Bachelor of Science
Paper Science and Engineering
Dr. Richard B. Valley
Alkaline papermaking systems have many advantages over the conventional acid systems; however, they have disadvantages in that they do not produce a highly sized sheet of paper consistently. This study investigation how shear, at the point of addition of an Alkenyl Succinic Anhydride/starch emulsion to a cellulose system, effects the sizing properties of a sheet. It was found that at no agitation, the sizing was low and very non-uniform. This was probably due to a lack of mixing, and thus a lack of contact between the emulsion and the fiber. The sizing increased as the mixing and contact between the emulsion and the fiber increased. However, with extremely high agitation, no apparent increase or decrease in sizing was observed. This could be due to either a flattening of the curve towards the top of the peak prior to decline, or possibly a constant trend that would remain and not decline.
Purpura, Phillip G., "The Effect of Shear on Asa Sized Paper" (1984). Paper Engineering Senior Theses. 435.