A laboratory study on the use of maple CTMP and calcium carbonate fillers in fine paper production
Lijuan Wang, Chuanyou Li, Jinyong Peng and Hongbin Liu, Tianjin University of Science and Technology, Tianjin, China
High yield pulp (HYP) has been gaining increasing interest as a partial substitute for hardwood bleached kraft pulp in fine paper grades due to its functionalities (e.g. bulk, opacity) and cost advantage. On the other hand, the use of calcium carbonate as a filling material is widely practiced in the paper industry. In this study, on basis of laboratory work, we demonstrated the impact concerning the use of maple HYP in combination with different types of calcium carbonate fillers, including precipitated calcium carbonate (PCC), ground calcium carbonate (GCC), and mixed calcium carbonate (PCC mixed with GCC) (PG), in fine paper production. The results showed there was a positive effect on boosting the bulk of fine paper grades as regards the combined use of PCC and HYP. At the ash content of 22%, the bulk of the PCC-filled handsheets containing 20% maple HYP reached up to 1.96 g/cm3 which is 12.6% higher than that of filled-handsheets without HYP.
Nordic Pulp & Paper Research Journal (NPPRJ) is an international scientific magazine covering science and technology for the areas of wood or bio-mass constituents, pulp and paper and including new fiber-based materials, recovery and by-products from pulping processes, bio-refining and energy issues. Articles meeting required scientific standards are accepted from any continent. Open Access: Articles not available through Gold Open Access may be purchased by credit card as a pdf file, to be downloaded within 24 h after ordering, at a price of 22 EUR per article. (Value added tax may apply depending on your location, which you enter at payment logout.) Such articles have Green Open Access, i.e. authors may share articles on their personal non-commerical homepage immediately after publication on the website and download them to non-commercial hosting platforms one year after publication in a full issue of NPPRJ. ISSN: 0283-2631