日本落叶松纸浆材造纸性能的研究

该文以日本落叶松为原料 ,分别研究了用碱量、硫化度、保温时间对硫酸盐法制浆的影响 ,并对不同树龄、不同部位和不同单株之间的制浆差别进行了比较 .结果发现 ,最佳蒸煮工艺条件为 :用碱量 2 1%、硫化度 2 5 %、最高温度 170℃、保温时间 2 5h ;随着树龄的增大 ,日本落叶松的蒸煮难度增加 ;在树干的顶部、干部和基部中 ,干部原料较易蒸煮 ;不同单株间的制浆性能存在一定的差别 ,但影响不大 ;树龄较小的 12年生日本落叶松纸浆的物理性能要好于 15年生和 2 3年生的 ;原浆的卡伯值高对保持日本落叶松KP浆的抗张强度和裂断长有利 ,而对耐折度和撕裂指数不利 .

Paper-making properties of Larix kaempferi pulpwood

This paper investigated the influence of dosage of soda, sulfureted degree and heat preservation time on Larix kaempferi kraft pulping, in order to find out the difference between L.kaempferi trees at different ages or between different vertical locations within a stem. The results show that the optimal technical conditions of pulping are that dosage of soda is 21%, sulfureted degree is 25%, the max temperature is 170℃ and heat preservation time is 2 5 h. With the growth of L.kaempferi, the trees become harder to cook. In the three sections of L.kaempferi stem, the middle section is easier to cook. The physical performance of the pulp of 12-year-old L.kaempferi is better than that of the 15- and 23-year-old; If the pulp has high Kappa value,its tensile strength and breaking length are better, but its folder endurance and tearing index are less.