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首页> 外文期刊>Revista rvore >ESTUDO DA RELA??O ENTRE CONDI??ES DE POLPA??O E PROPRIEDADES FíSICO-MEC?NICAS DO PAPEL
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ESTUDO DA RELA??O ENTRE CONDI??ES DE POLPA??O E PROPRIEDADES FíSICO-MEC?NICAS DO PAPEL

机译：纸浆条件与纸张物理力学关系的研究

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摘要

The aim of this study was to evaluate the influence of the pulping condition on the physicalmechanical properties of the eucalyptus bleached paper. Wood chips from a seven-year-old clonal hybrid of eucalyptus were used (Eucalyptus grandisxEucalyptus urophylla). The pulps were obtained from two distinct Lo-SolidsTM pulping conditions, namely: Condition PI - 16.5 % effective alkali, 30 % sulfidity, and 155 oC cooking temperature; and Condition PII - 17.5 % effective alkali, 32 % sulfidity, and 147 oC cooking temperature. Both conditions were performed to kappa number 18.0 ± 0.5. The bleaching were performed following the bleaching sequences OA(Ze)DP to achieve 90 ± 1% ISO brightness. The refinings were made at 0, 750, 1,500 and 3,000 revolution levels and the correlations were made based on the tensile index as independent variable of the refining curves. The physical-mechanical properties of the paper was influenced by the pulping conditions, with increasing of drainability, apparent density, TEA index, stretching and tear index to the PI pulp, considering the same tensile index. The PII pulp, however, achieved the same tensile index of PI pulp with lower refining level, thus, with lower energy waste. The pulping condition PII was most suitable for paper production for preserving more the integrity of the fibers, achieving the same tensile index with a lower refining level.
机译：本研究的目的是评估制浆条件对桉树漂白纸的物理机械性质的影响。使用来自七岁的桉树克隆杂种的木材（桉树祖氏肠霉素Urophylla）。从两个不同的LO-固体制浆条件下获得纸浆，即：条件PI-16.5％有效碱，30％硫酸和155℃烹饪温度;条件pii - 17.5％有效碱，32％硫酸盐和147℃烹饪温度。这两种条件都对κ18.0±0.5进行了。在漂白序列OA（ZE）DP后进行漂白，以达到90±1％的ISO亮度。再造林在0,750,1,500和3,000次旋转水平下进行，并且基于拉伸指数作为精制曲线的独立变量的相关性进行相关性。考虑到相同的拉伸指数，纸张的物理机械性能受制浆条件的影响，随着排水性，表观密度，茶指数，拉伸和撕裂指数的增加，延伸和撕裂指数，考虑到相同的拉伸指数。然而，PII纸浆实现了具有较低精炼水平的PI纸浆的相同拉伸指数，因此具有较低的能量浪费。制浆条件PII最适合于纸张生产，以保持更多的纤维的完整性，实现具有较低精炼水平的相同的拉伸指数。

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