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
Balance of retention, drainage and formation Retention has an impact also on drainage and formation. Good retention improves drainage but impairs formation. Use of retention chemicals is always a balance between good machine runnability and good paper quality (Figure 1). Retention, drainage and dewatering Good fines retention helps drainage by binding fines on the
Authors & references
Authors:
Jonni Ahlgren and Markus Korhonen, Kemira Oyj
References:
- Hubbe, M., Wet End Chemistry. The Basics for Papermakers, seminar Improve the Efficiency of Your PM Wet End, Kajaani, Finland, January 14–15, 2009
Videos
Exercises
This page has been updated 15.11.2020