硫酸盐竹浆与木浆的打浆特性和纸张性能对比研究

Comparative Study on Beating Characteristics and Paper Properties of Kraft Bamboo Pulp and Wood Pulps

关键词:  硫酸盐竹浆  木浆  PFI打浆  纸张性能

Key Words:kraft bamboo pulp  wood pulps  PFI beating  paper properties

摘要:以硫酸盐竹浆为研究对象，筛分后测定了竹浆各级分纤维的含量，研究了筛除细小纤维组分前后竹浆的打浆特性和纸张性能，并与漂白硫酸盐针叶木浆和漂白硫酸盐阔叶木浆（以下简称木浆）进行对比。研究发现，竹浆中长纤维级分和细小纤维组分含量较高，R16和P200级分纤维的含量分别为50.8%和25.1%；在PFI打浆过程中，相同打浆转数下，竹浆纤维相比木浆纤维更容易被切断和产生扭结现象。竹浆中细小组分有利于纸浆游离度的降低和纸浆保水值的提高，降低打浆能耗；在相同的游离度下，竹浆原浆和筛除细小纤维组分后的竹浆纸张的抗张指数、撕裂指数均大于木浆，竹浆原浆纸张的耐破指数和筛除细小纤维组分后的竹浆纸张的耐折度大于木浆的。

Abstract:Kraft bamboo pulp was used as the research object in this study， the contents of each fraction of bamboo pulp were determined after classification， and the beating characteristics and paper properties of bamboo pulp before and after sieving out the fine components were studied and compared with bleached kraft softwood pulp and bleached kraft hardwood pulp （wood pulps）. The results showed that the content of long fiber fractions and fine fraction in bamboo pulp was higher， of which the content of R16 and P200 were 50.8% and 25.1%， respectively. During the PFI beating， bamboo pulp fibers were more likely to be cut and kinked than wood pulp fibers at the same beating revolutions. The fine components in bamboo pulp could be beneficial to the reduction of pulp freeness and the improvement of pulp water retention value， reducing the energy consumption of beating. Under the same freeness， the tensile index and tearing index of bamboo pulp and bamboo pulp after sieving out the fine components were greater than that of wood pulps. The burst resistance index of bamboo pulp and the folding endurance of bamboo pulp sieving out the fine components were greater than that of wood pulps.