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首页> 外文期刊>Southern Forests: a Journal of Forest Science >The pulp and paper properties of Sirex noctilio infested and fire-damagedthermomechanically pulped, South African grown Pinus patula
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The pulp and paper properties of Sirex noctilio infested and fire-damagedthermomechanically pulped, South African grown Pinus patula

机译：南非Sinex noctilio感染和毁灭性热机械制浆的木浆和造纸特性

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Pinus patula is the softwood species most extensively planted in South Africa. However, large portions of these plantings are under threat from Sirex noctilio infestation and occasional forest fires. In this exploratory investigation, the effects of tree age, Sirex noctilio infestation and fire damage to wood from Pinus patula trees on their pulp and paper properties were evaluated. Pulp was produced using the thermomechanical pulping (TMP) process. The energy consumption required to pulp the different pulpwood materials was determined. Pulps were beaten for five different time periods to investigate the development of the fibre properties in response to increasing energy input. Paper properties such as burst, tear strength and breaking length were determined on handsheets manufactured from unbeaten and beaten pulps. Box and line plots and canonical variate analysis biplots were used to statistically analyse the data. It was found that the burst strength of paper produced from healthy trees was significantly higher than that from sirex-infested or fire damaged (burnt) trees. Similarly, the tear strength of paper from healthy and burnt trees was significantly better than from sirex-infested or young trees. No significant differences in breaking length were evident between the pulpwood materials and an increase in beating time did not lead to any improvements. From this study it can be concluded that wood from dead or dying, sirex-infested and young trees produced paper with consistently lower strength properties compared to wood obtained from healthy 12-year-old trees.
机译：阔叶松是南非种植最广泛的针叶树种。但是，这些播种的很大一部分都受到西里克斯夜蛾侵扰和偶尔森林大火的威胁。在此探索性调查中，评估了树龄，小夜蛾侵染以及火松对木材的燃烧对其纸浆和纸张特性的影响。纸浆是使用热机械制浆（TMP）工艺生产的。确定了将不同的纸浆材料制浆所需的能量消耗。将纸浆打浆五个不同的时间，以研究随着能量输入的增加，纤维性能的发展。在由未打浆和打浆的纸浆制成的手抄纸上确定纸的性能，例如破裂，撕裂强度和断裂长度。箱线图和典型变量分析双线图用于统计分析数据。结果发现，健康树木产生的纸张的破裂强度显着高于由番石榴感染或火灾损坏（烧毁）的树木产生的纸张的破裂强度。同样，健康树木和烧毁树木的纸张抗撕裂强度明显好于用番石榴树感染的树木或幼树。纸浆材料之间的断裂长度没有明显差异，并且打浆时间的增加也没有导致任何改善。从这项研究中可以得出结论，与从健康的12岁树种获得的木材相比，死掉或垂死的，受到番木纹感染和年轻的树木所产生的木材的强度特性始终较低。

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