• Kataja-Aho, Janne
• Vuoti, Sauli
• Haavisto, Sanna
• Hyvärinen, Sari
• Asikainen, Jaakko

Abstract

Cationizedbirch xylan was prepared and its use as a papermakingchemical was evaluated.The focus was on studying the effects ofcationized birch xylan on the wet anddry strength of fine paper. Theresults of the laboratory experiments show thatthe addition of 3percent of cationized birch xylan to birch kraft pulp improvedtheinitial wet strength of the web by 30 percent compared to base stock at asolids content of 55%. Furthermore, the tensile stiffness of the wetwebincreased by approximately a third and the dry tensile strengthimproved by26%, while the dry elastic modulus was not changed. Theimprovements in thestrength properties were clear when compared to thebase stock, but not as highas achieved with conventionally usedcationized starch. The difference betweenthe xylan and starch is mostlikely due to the shorter polymer chain length ofthe cationized xylan.

Topics

• impedance spectroscopy
• polymer
• experiment
• strength
• tensile strength