Reduction of the linting and dusting propensity of newspaper using starch and microfibrillated cellulose
2010 (English)In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, Vol. 25, no 4, 495-504 p.Article in journal (Refereed) Published
It is well known that a high linting and dusting tendency of newsprint will almost certainly cause a higher frequency of production stops in offset printing. Such stops are connected with production losses, health hazards and high costs for blanket cleaning. This report deals with the area of surface and internal treatments of thermomechanical pulp (TMP) containing paper grades such as newsprint. The objective of such treatments was to reinforce the surface strength of the paper in order to decrease the linting and dusting of the paper during printing. Surface treatments are usually employed in commercial practice by applying modified starches to the paper surface using film-press technology. Internal treatments of modified starches may also reduce the delamination resistance. In this investigation, laboratory TMP-sheets and commercial newsprint sheets were coated with microfibrillated cellulose (MFC) and anionic starch (A-starch). The surface treatments were also compared with internally treated TMP-sheets using cationic starch. The linting propensity of the sheets was evaluated using the Innventia linting propensity tester (Innventia-LPT). Both MFC and A-starch treatments greatly improved the linting propensity of the coated sheets. It was also found that there is a strong synergistic effect of using a mixture of microfibrillated cellulose and anionic starch. A mixture of these two additives gave a lower linting propensity than if either additive was used alone. When using MFC alone, sheet delamination may occur, due to the strong water retention and hold-out properties of MFC, but if anionic starch was used together with MFC a film anchoring of the coating to the base sheet was achieved, improving the linting propensity without risk for delamination.
Place, publisher, year, edition, pages
2010. Vol. 25, no 4, 495-504 p.
Anionic starch, Cationic starch, Dry strength, Dusting, Innventia linting propensity tester, Linting, Microfibrillated cellulose, Nanocellulose, Newsprint, Offset printing, Surface sizing, Surface treatment
Paper, Pulp and Fiber Technology
IdentifiersURN: urn:nbn:se:kth:diva-159216DOI: 10.3183/NPPRJ-2010-25-04-p495-504OAI: oai:DiVA.org:kth-159216DiVA: diva2:783353
QC 201501262015-01-262015-01-262015-01-26Bibliographically approved