再生纸浆与高得率浆纤维形态和强度性能的差异分析

Difference Analysis of Fiber Morphology and Strength Properties Between Recycled Pulp and High-yield Pulp

本研究深入探讨了国产废纸浆、美废12#和阔叶木高得率浆的纤维形态和物理强度性能。结果表明,高得率浆与国产废纸纤维形态分布近似,但纤维长度较短,细小纤维含量较高;干、湿零距抗张强度性能接近,2种纤维的强度相差不大,但与美废12#相比存在较大差距,其中湿零距抗张指数比美废12#低21%左右。国产废纸浆、美废12#和高得率浆的结晶指数分别为76%、72%和68%。2种再生纸浆灰分含量高,国产废纸浆的灰分为美废12#的3倍左右。多次回用后,2种再生纸浆纸张强度性能下降趋势较大,高得率浆纸张性能下降趋势较平缓。

The fiber morphology and physical strength properties of domestic waste pulp, US 12#waste pulp and high-yield hardwood pulp were investigated in this paper. The results showed that the fiber length distribution of high-yield pulp was similar to that of domestic waste pulp. The fiber length of high-yield pulp was shorter and the content of fine fibers was higher. The dry and wet zero pitch tensile strength were closed. The difference in fiber strength between high yield pulp and domestic waste pulp was not large, but there was a large gap compared to US 12#waste pulp, of which the wet zero pitch tensile index was about 21% lower than that of US 12#waste pulp. The crystallization index of domestic waste pulp, US 12#waste pulp and high-yield pulp were 76%, 72% and 68%, respectively. The ash contents of domestic waste pulp and US 12#waste pulp were high, and the ash content of domestic waste pulp was about 3 times that of US 12#waste pulp. After reused for several times, the strength properties of the paper prepared from domestic waste pulp and US 12#waste pulp had a larger decline trend, and the decline trend of the paper prepared from high-yield pulp was relatively gentle.