白水中溶解与胶体物质的特征与化学控制

为了提高纸机白水循环使用程度,以薄页包装纸抄造白水为对象,研究表征了其溶解与胶体物质( DCS)的性质,探讨了阳离子聚合物对白水中DCS的控制效果,以及对纸料抄造性能和纸张物理强度性能的影响。结果表明, DCS是白水固形物中的主要组分,含量66.2％,且以溶解性物质为主。有效控制白水中DCS障碍较合适的处理条件为：聚二甲基二烯丙基氯化铵( PDADMAC)用量0.0292 g?L－1,聚乙烯亚胺( PEI)用量0.0400 g?L－1,处理时间5 min。

Characterization and chemical control of the dissolved and colloidal substances in the white water of tissue wrapping paper

In order to increase the white water recirculation, the dissolved and colloidal substances ( DCS) in the white water of tissue wrapping paper were characterized, and two kinds of cationic polymers were employed to investigate their effects on the control of DCS, the pulp slurry drainability and the paper physical strength property. It could be concluded as that, the DCS were the major components of solid substances in the white water, up to 66. 2% of solid substances, and the main portion of DCS were dissolved substances. For chemical control of DCS, the treatment conditions could be summarized as:dosage of PDADMAC was 0.029 2 g?L-1 and that of PEI 0.040 0 g?L-1 , stirring for 5 min, respectively. The drainability of pulp slurry was improved significantly and the paper tensile strength was increased dramatically.