SLIGHTLY OXYGEN-DELIGNIFIED MASSON PINE KRAFT PULP AND ITS IMPACT ON PULP COLOURATION
The brown paper is growing fast due to a larger number of market demands in China. However, the colouration of paper sheet is usually hard to maintain stability if only by means of interior stock dyeing. So, in order to solve this problem, in this paper, slight medium consistency oxygen-delignified bleaching was used to improve the brightness and colouration of kraft pulp. Masson pine kraft pulps with ~55 Kappa number were slightly bleached through the orthogonal experiments, and the chromatic aberration principle was utilized to analyze the experimental results. The optimal parameters of the slight oxygen delignification for kraft paper were oxygen pressure 0.3MPa, temperature 85℃, reaction time 20min, 3％ of NaOH, and 0.5％ of MgSO4; colour parameters were L* 67.58, a* 5.68, b* 21.89, and the brightness was 23.0％ISO, according to the target kraft paper. The slight oxygen delignification is hence a suitable bleaching for kraft paper.
masson pine kraft pulp colouration slight bleaching oxygen delignification
Li Weiwei Yang Rendang Han Wenjia Wang Bin Chen Kefu
State Key Lab of Pulp and Paper Engineering, South China University of Technology, Guangzhou,510640,China
国际会议
广州
英文
996-999
2010-11-08（万方平台首次上网日期，不代表论文的发表时间）