New Technology for Increased Filler Use and Fiber Savings in Graphic Grades, 2011 PaperCon Conference

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Virgin fiber is an expensive raw material in the paper making process. There are continual efforts to replace it with less costly materials, such as calcium carbonate. While increased filler usage has long been sought after by the paper industry, technical limitations have precluded the practice. A novel solution to this problem will be presented. The approach involves the preparation of filler designed to be incorporated at higher levels in papermaking operations without compromising the performance of the final product. In particular, the critical dry strength and optical properties of the sheet are preserved at the higher filler level. Results from commercial applications of this technology in the uncoated and coated wood-free grades will be presented.