Manufacture of Low Density Paper by Cationic Fatty Acid Bulky Promotor Treatment (1) - Effect of Its Concentration and Pulp Type -

ABSTRACT As a part of the study on manufacture of low density paper by organic bulky agent treatment, the effects of cationic fatty acid bulky agent on physical and optical properties of handsheets were elucidated. The research on change of physical and optical properties of paper samples according to bulky agent concen-tration, pulp type, and pulp combination werecarried out. The results demonstrated that an increase of the concentration of cationic fatty acid bulky agent was proportional to an increase of the bulky properties of paper samples while tensile strength decreased. Also, the more the treated concentration of cationic fatty acid bulky agent increased, the more the ISO brightness of paper samples decreased while the opac-ity increased. The effectiveness of bulky agent with softwood bleached kraft pulp (SwBKP) was higher than that with hardwood bleached kraft pulp (HwBKP). In addition, the effectiveness with mixed pulps was higher than that with single pulp. Keywords: Bulky agent, low density paper, cationic fatty acid amine, bulky agent concentration, pulp type