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近年来,高得率浆(HYP)在高级纸中的应用逐渐增加,对高得率浆的视觉品质要求也相应提高,如何高效合理地提高浆张的白度以及白度稳定性成为广大造纸工作者关注的热点。传统的HYP过氧化氢漂白成本较高,污染负荷比较严重,而且以损失高得率浆的松厚度和光散射系数等特性为代价来取得较高的白度。本文主要围绕高得率浆的发展及应用,论述了近些年高得率浆的漂白工艺的研究进展。此外,还探讨了高得率浆的过氧化氢/OBA漂白工艺与传统高得率浆过氧化氢漂白工艺的优缺点,以及荧光增白剂在含高得率浆高级纸中的应用研究。
In recent years, the application of high-yield pulp (HYP) in high-grade paper has gradually increased, and the visual quality requirements of high-yield pulp have also been correspondingly raised. How to improve the whiteness and whiteness stability of pulp effectively and rationally has become the major issue of papermaking Workers are concerned about the hot spots. Traditional HYP hydrogen peroxide bleaching costs higher, the pollution load is more serious, but also to lose high yield pulp bulk and light scattering coefficient and other characteristics at the expense of higher whiteness. This paper focuses on the development and application of high-yielding pulp, and discusses the research progress of the bleaching process of high-yielding pulp in recent years. In addition, the advantages and disadvantages of the hydrogen peroxide / OBA bleaching process of high-yield pulp and the traditional high-yield pulp hydrogen peroxide bleaching process were also discussed, as well as the application research of optical brighteners in high-yield pulp high-grade paper.