摘要
对慈竹单段漂白和多段组合漂白性能进行了系统研究，提出了慈竹化机浆漂白至71％以上白度的工艺。研究结果表明，H202总用量10％，慈竹化机浆经单段H202漂白，白度只能达到64．7％-65．0％；两段H2O，漂白具有较高的漂白效率，漂白浆白度达到66．6％～67．1％；总漂剂用量为12％的三段组合漂白，结束段分别使用H202、FAS和Na2S20。不同漂门方式，FAS漂白效率最优，白度达到72．9％；其次是H202漂白，白度为71．9％；以FAS为结束段的漂白，与本色慈竹化机浆相比，抗张指数、耐破指数和撕裂指数分别提高200％～300％、250％～300％和250％～270％。采用碱性Na2SO3化学预浸渍，两段H202漂白加一段FAS漂白的三段组合漂白，慈竹化机浆可漂白至71％以一的白度。
Bleaching of chemimechanical pulps from a bamboo species Neosinocalamus affinis （Rendle） Kengf to a higher brightness by single- and multi-stage processes was discussed in this paper. By using 10% H2O2, the bamboo pulps were only able to bleach to a brightness of 64. 7% - 65.0% ISO in single stage process. Bleaching efficiency was improved by using two-or three-stage process. The brightness of 66.6% - 67. 1% ISO was obtained by two-stage bleaching at 10% H2O2 charge in total. Bleaching properties of the bamboo high yield pulps by using three bleaching chemicals of H2O2, FAS and NaS204 in the final stage of the three-stage process were compared in term of the brightness： FAS 〉 H2O2 〉 NaS204. The brightness of 69% -73% ISO was obtained by using bleaching chemicals of 10% H2O2 and 2% FAS. After bleaching, the tensile, tear and burst index of the bamboo pulps was increased by 200% - 300%, 250% - 300%, and 250% - 270% respectively. The effects of two kinds of chemical-pretreatment of bamboo chips on brightness and strength properties of the bleached pulps were compared as well.
出处
《中国造纸》
CAS
北大核心
2010年第3期1-4,共4页
China Pulp & Paper
基金
"十一五"国家科技支撑计划专题(2006BAD18B0502
2006BAD19B0705)研究内容
关键词
慈竹化机浆
漂白
过氧化氢
FAS
bamboo chemimechanical pulps
bleaching
hydrogen peroxide
FAS
