OPTIMAL UTILIZATION OF SHORT FIBER FRACTION OF OCC FOR IMPROVING RETENTION AND DRAINAGE
OCC (Old Corrugated Containers) is the major fiber source for linerboards and corrugating mediums that require diverse specification in strength properties. Many studies have been focused to overcome the problems of strength reduction of brown grades when recycled fibers are used as raw materials. The problem of strength loss for papers made from recycled fibers is closely associated with the increased amount of fines in recycled fibers and hornification of fibers. This shows that the optimal management and proper use of fines in recycling papermaking system are critical to get most benefits of using recycled fibers. In this study some approaches for optimal use of fiber fines in recycled paper mill have been investigated. Stock samples, prepared in the laboratory and obtained from a recycling plant, were used. Fractionation of these samples was made using Sweco screen. We evaluated the ability of polyelectrolytes to form floes by measuring the turbidity change after polymer addition. Qualitative analysis of floe images was also carried out using handsheets. The influence of fractionation ratio and the type and amount of addition of polyelectrolytes on drainage and retention was also evaluated. Different methods of polymer addition were compared to find the most effective ways of treating recycled fiber stocks with polyelectrolytes. Addition of polyelectrolytes to the short fiber fraction was most effective in retention and drainage. Polyelectrolyte with high charge density and high molecular weight could be chosen for drainage and with high molecular weight and branch structure was good for retention.
OCC fractionation fines retentioni drainage
Hye-Jung Youn Seong-Min Chin Ik-Sun Choi Ji Yong Kim Yung Bum Seo Chang-Man Sohn
Seoul Natl Univ., San 56-1, Sillim-Dong, Gwanak-Gu, Seoul, 151-921, Korea Chungnam National University, Daejeon, Korea R&D Center, Hansol Paper Co., Ltd., Daejeon, Korea
国际会议
广州
英文
483-487
2006-11-08（万方平台首次上网日期，不代表论文的发表时间）