Effects of Adding Co-ground Talc and Calcium Carbonate on the Retention and Paper Properties of Handsheets

共濕磨滑石粉與碳酸鈣對於留存率及紙張性質的影響

彭元興(Yuan-Shing Perng) ； 王益真(Eugene I-Chen Wang) ； 楊逸婷(Yi-Ting Yang) ； 李奕威(Yi-Wei Lee)

《台灣林業科學》 25卷2期 (2010/06) Pp. 129-137

https://doi.org/10.7075/TJFS.201006.0129

摘要

本研究為應用2種滑石粉／碳酸鈣製備方式：混合共濕磨滑石粉／碳酸鈣及單獨濕磨碳酸鈣與乾磨滑石粉混合，來探討滑石粉取代部份碳酸鈣填料時對於一次留存率、灰分、上膠度、嵩度、抗張強度、平滑度、粗糙度、白度、不透明度等的影響。以100%濕磨碳酸鈣及100%乾磨滑石粉為空白組。滑石粉取代碳酸鈣量為10%，填料（碳酸鈣＋滑石粉）添加量為0、10、20、30%。實驗結果顯示，滑石粉取代10%碳酸鈣可以提高一次留存率、填料留存率、嵩度、上膠度、斷裂長度、白度等性質，但會降低平滑度及不透明度。共濕磨滑石粉與碳酸鈣組與濕磨碳酸鈣組及乾磨滑石粉組比較，可以得到粒徑分佈較均勻且平均粒徑較小，同時片狀的外型邊緣亦較平順的填料。共濕磨碳酸鈣／滑石粉組與濕磨碳酸鈣+乾磨滑石粉組比較，可以提高填料留存率、上膠度、斷裂指數及白度等性質。

關鍵字

滑石粉 ； 共濕磨 ； 碳酸鈣 ； 留存率 ； 斷裂指數

並列摘要

In this study, 2 methods of preparation of talc and calcium carbonate were employed. The 2 minerals were either ground up together with water or the wet-ground calcium carbonate was mixed with dry-ground talc. Then the preparations were added to a typical fine paper furnish to investigate the effects of replacing a portion of calcium carbonate with talc on the first-pass retention (FPR), ash, sizing degree, bulk, tensile strength, smoothness, roughness, brightness, and opacity of the handsheets (with a basis weight 60 g m^(-2)). Handsheets produced with 100% wet-ground calcium carbonate (GCC) and 100% dry-ground talc served as the control groups. The replacement level of talc was 10%, and the dosages examined were 0, 10, 20, and 30%. The results indicated that replacing a portion of GCC with talc enhanced the FPR, ash retention, bulk, sizing degree, tensile index, and brightness of the handsheets at the cost of decreased smoothness and opacity. Comparing the 2 preparations, grinding together the talc and calcium carbonate appeared to produce a more-uniform particle size distribution and smaller average particle diameters than the separately ground and mixed groups. The edges of the platy filler were smoother for the former group as well. Comparing the 2 groups, talc and GCC ground together produced better handsheet filler retention, sizing degree, tensile index, and brightness.

並列關鍵字

talc ； co-grinding ； calcium carbonate ； retention ； tensile index