Natural fibre products
- Printing and writing papers
- Paperboards
- Tissue
- Nonwovens
- Speciality papers
- Production of paper and board
- Stock and water systems
- Web forming
- Wet pressing
- Drying of natural fibre products
- Surface sizing
- Pigment coating
- Finishing
- Converting of paper and board
- Papermaking chemistry
- Paper physics
- Printing
Hydrodynamic disturbances In addition to the laminar shear on the wire, the fibre orientation in machine-made paper depends also on other hydrodynamic effects. One important factor is the anisotropic fibre orientation distribution already in the jet as it emerges from the headbox 1. The anisotropic jet is caused by the converging slice channel that accelerates
Authors & references
Edited by:
Professor Jouni Paltakari, Aalto University
Based on: Niskanen, K. & Pakarinen, P. Paper Structure (Chapter 1). In: Niskanen, K. (ed), Paper Physics, (Book 16), Papermaking Science and Technology. 2nd edition. Jyväskylä, 2008, Finnish Paper Engineers’ Association/Paperi ja Puu Oy. pp. 11 – 58. More literature references can also be found in this chapter.
References:
- Wrist, P., “Dynamics of sheet formation on the Fourdrinier machine”, The Formation and Structure of Paper (F. Bolam, Ed.), B.P.B.M.A., London, 1962, pp. 839–888.
- Niskanen, K. J., “Distribution of fibre orientations in paper”, Fundamentals of Papermaking (C. F. Baker and V. W. Punton, Eds.), Mech. Eng. Publ,, London, 1989, vol. 1, pp. 275–308.
- Parker, J., “The Sheet-Forming Process”, STAP No. 9, TAPPI, Atlanta, 1972.
- Hasuike, M., Johansson, P-A., Fellers, C., et al., “Fibre Orientation and Its Relation to Paper Formation Studied by Image Analysis”, 1987 International Paper Physics Conference Proceedings, CPPA, Montreal, pp. 185–188.
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This page has been updated 25.11.2020