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No 2 / 4

Adsorption of cationic polyacrylamide on mechanical pulp

Date: 1.6.1994-30.12.1996
Code: K7612
Department: Åbo Akademi University / Faculty of Chemical Engineering (KTF), Laboratory of Paper Chemistry
Address: Porthansgatan 3, FIN-20500 Åbo
Phone +358-2-2154 305
Fax +358-2-2516 757
Project leader: TkD Dan Eklund, professor (1.6.1994-)
Researchers: DI Maristiina Mikkonen (1.1.1995-)
Type of research: 0 (0=Within duty, 1=Ordered research, 2=Co-operation)
- basic research 50 %
- applied research 50 %
Finnish funding organizations: TEKES, Helsinki () FIM
Man months: Totally: 12 months
Keywords: massatillverkning, forskning, massanvalmistus, tutkimus, adsorption, störsubstanser, mekaniska massa, katjonisk polyakrylamid, adsorption, detrimental substances, mechanical pulp, cationic polyacrylamide,

The closure of circulation systems in the paper mills increases the amount of inorganic and organic soluble substances and colloidal material-detrimental substances - in circulating water system because of their low retention.Detrimental substances will cause problems in the paper machine and they effect the chemistry of the system.Because of these reasons the detrimental substances should be eliminated from the system.It is possible to use additive chemicals in a clean pulp.In this work was chosen cationic polyacrylamide which is a widely used as a retention and dry strength aid. -The aim of this study is to find out the effect of detrimental substances on the adsorption of cationic polyacrylamide on mechanical pulp.The mechanisms of adsorption and the effect of polyacrylamide on retention and strength properties in the present of filler will also be studied.


26.2.1996 / 27.2.1996