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首页> 外文期刊>Journal of Wood Chemistry and Technology >EVALUATION OF KRAFT-PS COOKING FOR EUCALYPT AND PINE WOOD CHIP MIXTURES
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EVALUATION OF KRAFT-PS COOKING FOR EUCALYPT AND PINE WOOD CHIP MIXTURES

机译：桉树皮和松木屑混合物的牛皮纸-PS烹饪评估

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The purpose of this study was evaluating polysulfides (PS) as additives in kraft cooking of wood mixtures eucalypt (E) and pine chips (P) wood mixtures, namely: 50E/50P, 70E/30P, and 90E/10P. Bleaching (O(D/A)(EP)D) and refining of pulps were also investigated. The PS addition (1.5 or 3.0%) to the kraft cooking preserved the hemicelluloses resulting increased pulp yield and reduced H-factor. The oxygen delignification was more efficient for chip mixtures containing higher proportion of pine chips, but was not largely affected by the addition of PS. The bleach chemical consumption was not significantly influenced by PS dosage or by the wood chip mixture. The burst and tear indexes were improved by increasing the proportion of pine chips to the mixture, but an opposite effect was observed for refinability, tensile index, and opacity. The kraft-PS pulps showed increased refinability, tensile, and burst strengths in relation the standard pulps, but lower opacities.
机译：这项研究的目的是评估多硫化物（PS）在牛皮纸混合物桉木（E）和松木屑（P）木材混合物（即50E / 50P，70E / 30P和90E / 10P）的牛皮纸蒸煮中的添加剂。还研究了漂白（O（D / A）（EP）D）和纸浆精制。牛皮纸蒸煮中添加的PS（1.5％或3.0％）保留了半纤维素，从而提高了纸浆产量并降低了H因子。对于含有更高比例的松木屑的木屑混合物，氧脱木素作用更为有效，但不受PS添加的很大影响。漂白剂的化学消耗量不受PS剂量或木片混合物的影响。通过增加松片在混合物中的比例可以改善破裂指数和撕裂指数，但在提炼性，拉伸指数和不透明性方面却观察到相反的效果。牛皮纸-PS纸浆相对于标准纸浆显示出更高的可提性，抗张强度和破裂强度，但浊度较低。

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