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
Press nips Contribution of wet pressing in papermaking Wet pressing is a unit operation of papermaking where water is expelled from the wet web by mechanical compression in the nip formed by two rolls or a roll and a shoe. The water removal is often assisted by the application of heat to the wet web,
Authors & references
Authors:
Professor Jouni Paltakari, Aalto University
Based on Paulapuro, H., Wet pressing, (Chapter 9), In: Paulapuro, H. (ed.), Papermaking Part 1, Stock Preparation and Wet End, (Book 8), Papermaking Science and Technology. 2nd ed. Finnish Paper Engineers´ Association /Paperi ja Puu Oy. Jyväskylä, 2007, p. 343–401. More literature references can also be found in this chapter.
References:
- Nilsson, P. and Larsson, K.O., Pulp Paper Mag. Can. 69(24):T438 (1968)
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Exercises
This page has been updated 24.11.2020