PROPERTIES OF HIGH YIELD PULP (HYP) AND ITS EFFECT ON THE WET-END CHEMISTRY
Some of the recent results are summarized on the characteristics of HYP and its effect on the wet-end operations of the papermaking process in the production of printing and writing paper, including internal sizing, filler retention, OBA/dye addition. Compared with bleached kraft pulp (BKP), HYP pulp contains more fines, lignin and anionic trash, as well as more carboxylic and sulfonic groups that impart HYP fibers higher charge density. Due to these differences, substituting HYP for BKP may have some impacts on the wet-end chemistry of the papermaking process. Generally, HYP has higher response to both AKD and rosin ester sizing than BKP due to the higher anionic group content and self-sizing capability of HYP, although HYP fines and anionic trash can affect the sizing adversely. The addition of cationic polymers, such as PEI, can eliminate the negative effect of HYP anionic trash on internal sizing and filler retention. Under the optimized conditions, a partial substitution of BKP with HYP can lead to improved filler retention. OBA/dye can be used to improve the optical properties of HYP and HYP-containing furnish.
High-yield pulp fine paper sizing OBA wet-end chemistry
Ni Yonghao He Zhibin Zhang Hongjie Zhou Yajun
Limerick Pulp and Paper Centre University of New Brunswick PO Box 4400, Fredericton, NB, Canada E3B Tembec Industries Inc., CP 3000, Temiscaming, QC,Canada J0Z 3R0
国际会议
广州
英文
1430-1435
2010-11-08（万方平台首次上网日期，不代表论文的发表时间）