Chemical activation of aspenwood components in the production of thermomechanical pulp

Abstract

The article represents the results of researches that allow to establish the appropriateness of usage of aspenwood modified by sodium monosulphite as a raw material for thermomechanical pulp (TMP) in newsprint production. Replacement of 30% of sprucewood by aspen using 1% consumption of sodium sulphite permits to achieve strength of samples of unbleached TMP 4510 m, which ensures the highest demands to newsprint. In this case the process of wood grinding accelerates and the reactivity of hemicelluloses and lignin increases.