Effects of Fractionation and Mechanical Treatments of Korean OCC on Paper Properties
Tae Young Kang, Hye Jung Youn and Hak Lae Lee
Linerboards and corrugating mediums are being produced using recycled old corrugated containers (OCC) as major raw materials. However, it causes many quality and process problems including strength reduction, deterioration of machine runnability, etc. To find the most appropriate recycling process for the highly recycled papers like Korean OCC, several approaches of fractionation and mechanical treatment of the fractionated stocks were examined and compared. The stock obtained after refining of the whole stock containing both long and short fiber fractions gave better strength but lower in freeness. Refining of the long fiber fraction and remixing it with unrefined short fiber fraction also improved strength, but the improvement was less than the case of refining whole stock. Mechanical treatment of fines fraction did not show any changes in strength. Results indicated that not only long fiber fraction but also short fiber fraction should be mechanically treated to improve strength properties of highly recycled fibers. Removal of the contaminants in the long fiber fraction was crucial for strength improvement.
Fines, Fractionation, Long fiber fraction, Recycling, Refining, Short fiber fraction
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