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在实验室用搅拌器的高强度剪切力破坏半纤维素组成不同的两种浆料的纤维。通过与未经破坏的浆料纤维的强度比较来评价这些纤维抗机械处理的能力。研究表明,在较高的氢氧根离子浓度条件下制得的浆料,木聚糖含量较少,葡萄糖-甘露聚糖含量较多,并对机械处理很敏感。根据撕裂指数/抗张指数和湿态零距抗张指数来评价纸浆强度的降低。含有较多木聚糖和较少葡萄糖-甘露聚糖的浆料在进行机械处理时无强度损失。通过选择合适的蒸煮参数,可以得到含有特定糖类的浆料。浆料纤维中糖类成分影响其抗机械破坏的能力。
The high shear strength of the agitator in the laboratory destroyed the fibers of the two slurries with different hemicellulose compositions. The ability of these fibers to resist mechanical handling was evaluated by comparison with the strength of unstruced pulp fibers. Studies have shown that slurries prepared at higher hydroxide ion concentrations have less xylan content and more glucose-mannan content and are sensitive to mechanical handling. The reduction in pulp strength was evaluated on the basis of the tear index / tensile index and the wet zero gauge tensile index. Slurries containing more xylan and less dextran-mannan had no loss of strength when subjected to mechanical treatment. By selecting the appropriate cooking parameters, it is possible to obtain slurries containing specific sugars. The sugar content of the pulp fiber affects its resistance to mechanical damage.