STUDY ON ONP NEUTRAL DEINKING TECHNICAL CONDITIONS AND MECHANISM
Orthogonal experiment and single factor experiment were used to investigate neutral deinking technology of old newsprint (ONP) by self-compounded TM-1. Olympus inverted biological microscope and scanning electron microscopy (SEM) were used to analyze fiber surface changing during neutral deinking and ink particles dispersing behavior in the pulp. The results showed that optimum operational conditions of neutral deinking was TM-1 0.5％, Na2SiO3 2.0％, EDTA 0.6％, mechanical time 20s, pulp consistence 1.0％, temperature 60 , curing time ℃ for 30min and floatation time for 5 min. Under this condition, brightness of the deinked pulp increased 8.0％ SBD, and the ink removal efficiency reached by 96％. Most of ink particles were separated from the fiber and aggregated into larger particles. The deinked pulp and its fiber profile became more clearer. Compare with the pulp by alkaline deinking, the neutral deinking fiber surface had less fibrils and damaging degree was less.
old newspaper neutral deinking brightness ink particles
Zhang Xiaolin Wang Rumin
School of Science, Northwestern Polytechnical University, Xi’an, 710072, China School of Printing an School of Science, Northwestern Polytechnical University, Xi’an, 710072, China
国际会议
广州
英文
818-821
2010-11-08（万方平台首次上网日期，不代表论文的发表时间）