製漿前處理對機械紙漿光學性質之影響

Effects of Pulping Pretreatment on the Optical Properties of Mechanical Pulps

杜明宏(Ming-Horng Duh) ； 汪淮(Hweig Wang)

《林產工業》 13卷1期 (1994/03) Pp. 129-151

https://doi.org/10.6561/FPI.1994.13(1).8

摘要

本試驗之目的在比較製漿時之各項前處理對於漂白及未漂白機械紙漿化學及光學性質之影響，試驗結果如下：化學藥劑浸漬前處理能降低機械漿醇苯抽出物之含量，使花旗松機械漿的醇萃抽出物含量，由未處理前的2.8%降為1.4%。加熱前處理易導致花旗松及木油桐機械漿白度之下降，而後續之藥劑浸漬前處理則對於花旗松未漂機械漿之白度有不利影響，然對於木油桐未漂機械漿之白度反有提升之效果。與未處理漿比較，木油桐藥劑浸漬前處理機械漿以低亞硫酸鹽漂白時，雖然視白度不及未處理漂白漿，但白度安定性則較佳，然對於過氧化物漂白漿則效果不顯著。

關鍵字

精煉機械紙漿 ； 熱磨機械紙漿 ； 化學浸漬

並列摘要

The main objective of this study was to investigate the effects of pulping pretreatment on the chemical and optical properties of mechanical pulps. The results are summarized as follows: By the use of chemical preimpregnation, the alcohol-benzene extractives of Douglas fir mechanical pulps reduced from 2.8% to 1.4%. Heat pretreatment is liable to induce the yellowing of mechanical pulp. The succeeding chemical impregnation has negative effect on the whiteness of Douglas fir mechanical pulps, but shows positive effect on that of wood oil tree mechanical pulps. Chemical impregnation can improve the whiteness stability of hydrosulfite bleached wood oil tree mechanical pulps, but have no significant effect on those of peroxide bleached mechanical pulps.

並列關鍵字

Refiner mechanical pulp ； thermomechanical pulp ； chemical impregnation