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对洋麻硫酸盐浆的PFI打浆性能进行研究,探讨纸浆的打浆度及纤维形态的变化规律,并对不同打浆度的纸浆进行强度指标及光学性能的检测。结果表明,洋麻硫酸盐浆易打浆,打浆能耗较低,在打浆转数为2 000r时即达到42°SR,纤维的二重重均长度和宽度随着打浆度的升高,先增加然后回落;纤维粗度也是先增大后减小,细小纤维含量逐渐增加,纤维的弯曲指数和扭结指数先降低后升高。对成纸强度指标的测试发现,随着打浆度的提高,耐破指数和裂断长逐渐提高,而撕裂指数逐渐降低,在打浆度为42°SR时,强度指标良好,撕裂指数18.66mN·m~2·g~(-1),耐破指数4.72kPa·m~2·g~(-1),裂断长7.38km。成纸的白度和不透明度随着打浆度的提高而有所降低。
The pulping performance of kenaf kraft pulp was studied. The change of pulp beating degree and fiber morphology was discussed. The strength index and optical property of pulping pulp with different beating degree were tested. The results show that the kraft kraft pulp is easy to beaten and the energy consumption of beating is low. When the beating speed is 2 000 r, the kraft kraft pulp reaches 42 ° SR. The double weight average length and width of the kraft pulp first increase and then increase Down; the fiber coarseness also increased first and then decreased, the fine fiber content increased gradually, the fiber bending index and kink index first decreased and then increased. The test of paper strength index found that with the increase of beating degree, the rupture index and the rupture length increased gradually, while the tearing index decreased gradually. At the beating degree of 42 ° SR, the strength index was good and the tear index was 18.66 mN · m ~ 2 · g ~ (-1), burst index of 4.72kPa · m ~ 2 · g ~ (-1) and crack length of 7.38km. Paper whiteness and opacity with the degree of beating reduced.