Effects of Fiber Morphological Characteristics and Refining on Handsheet Properties

纖維形態及鍊漿對於手抄紙性質的影響

彭元興(Yuan-Shing Perng) ； 王益真(Eugene I-Chen Wang) ； 鄭殷立(Yin-Li Cheng) ； 陳毓鈞(Yu-Chun Chen)

《台灣林業科學》 24卷2期 (2009/06) Pp. 127-139

https://doi.org/10.7075/TJFS.200906.0127

摘要

本研究目的為在固定濕端內添化學藥品條件下，應用不同纖維形態的漂白化學木漿（北方針葉樹及放射松2種；尤加利漿、印尼雜木漿及相思木3種），在不同鍊漿程度下，個別纖維及針葉／闊葉纖維混合配料，來探討對於手抄紙嵩度、吸水度、透氣度、乾／濕不透明度的影響，期能做為抄造特殊紙的配料及應用條件選用的參考。纖維形態指標以纖維長度、粗細度及纖維分布為代表。
個別纖維實驗顯示隨著鍊漿程度的增加，纖維分佈與鍊漿程度成正相關性，游離度及纖維長度則呈現負相關性，粗細度呈現不規則現象。混合配料實驗顯示，隨著闊葉樹漿配比增加，游離度、纖維長度與粗細度呈負相關性，纖維分布呈正相關性。可以藉由鍊漿程度及針葉/闊葉木漿配比，來調整配料達到抄紙機需求的游離度及纖維形態性質。
個別纖維組手抄紙實驗顯示，嵩度及不透明度（乾／濕）隨著鍊漿程度而下降，呈負相關性，吸水度、透氣度值隨著鍊漿程度而上升，呈正相關性。闊葉樹漿組的嵩度、不透明度高於針葉樹漿組。針葉樹漿組的吸水度、透氣度值高於闊葉樹漿組。混合配料組手抄紙實驗顯示，隨著闊葉樹漿比例提高，印尼雜木組嵩度呈正相關性，尤加利組及相思木組呈負相關性，吸水度及透氣度值呈負相關性，不透明度呈正相關性。嵩度及吸水度與粗細度呈正相關性（印尼雜木組除外），透氣度與粗細度及纖維分布的關係隨漿料組合而異，不透明度與纖維分布呈正相關性。

關鍵字

鍊漿 ； 纖維形態性質 ； 嵩度 ； 吸水度 ； 透氣度 ； 不透明度

並列摘要

Under a fixed wet end chemical additive regime, pulp fibers of different morphological characteristics, including 2 softwood pulps of northern softwood and radiata pine, and 3 hardwood pulps of eucalyptus, mixed Indonesian hardwoods, and acacia underwent different degrees of pulp refining and then were used individually or as a blend (1 softwood to 1 hardwood pulp) to form handsheets.
The handsheet bulk, water absorption, air permeability, and dry and wet opacities properties were then compared and correlated to the fiber morphological indicators such as fiber length, coarseness, and population in order to provide a reference for furnish blending to make specialty papers and other applications. The experiment on the individual pulp fibers indicated that along with increasing degrees of refining, the fiber population increased proportionally, pulp freeness and fiber lengths changed in an inverse manner, while fiber coarseness changed irregularly. The blended furnishes, on the other hand, indicated that along with increases in the hardwood pulp proportions, the freeness, fiber lengths, and coarseness changed in an inverse trend, whereas the fiber population also increased. Thus, it is feasible to use refining and blending of softwood and hardwood pulps to adjust the stock that meets the required freeness and fiber morphological properties for paper machines.
Analysis of handsheets formed from individual pulps indicated that paper bulk and both dry and wet opacities decreased with an increased degree of pulp refining and were negatively correlated. Water absorption, and air permeability, on the other hand, increased with increasing pulp refining and exhibited positive correlations. The bulk and opacity of the hardwood pulps were higher than those of the softwood pulps, whereas the water absorption and air permeability values were higher than those of the hardwood pulps. The blended furnish study indicated that along with increasing hardwood pulp proportions, the paper bulk of Indonesian hardwoods pulp containing furnishes increased proportionally, while those of eucalyptus and acacia pulps containing furnishes showed negative correlations. Water absorption and air permeability values were negatively correlated to the hardwood pulp proportions, whereas opacities showed positive correlations. In addition, paper bulk and water absorption were positively correlated with the fiber coarseness (except for the Indonesian hardwoods), Relationships between the paper air permeability value and fiber coarseness and populations were furnish-dependent; while there was a positive correlation between paper opacities and fiber populations (except for the Indonesian hardwoods). There was a linear correlation between the pulp blend ratio and handsheet opacity. Hence, the opacity of a blended paper was derived from the opacities of the individual softwood and hardwood fibers.

並列關鍵字

fiber morphological properties ； refining, bulk ； water absorption ； air permeability ； opacity