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Carry-over and wet-end chemistry
After reading this article you will..
- know how carry-over of recycled pulp affects papermaking.
Recycled fibre
- Legislation
- Sources and quality of paper for recycling
- Recyclability of paper and board products – Deinkability
- Recycling versus recyclability
- Technical aspects of recycling
- Relevance of recyclability
- Repulpability and deinkability
- Deinkability test methods
- EPRC deinkability assessment
- Deinkability of different printed products
- Removability of adhesive applications
- EPRC assessment on removability of adhesive applications in graphic paper products
- Unit operations and equipment in recycled fibre processing
- Design of processes
- Design principles for stock preparation processes
- Process design for graphical grades, news print
- Process design for tissue
- Process design for board and packaging grades
- Reject and Sludge handling for graphical and tissue applications
- Reject and Sludge handling for board and packaging applications
- Water management
- Additives
- Deinking
- Bleaching of deinked pulp
- Process water treatment
- Sticky control – detackification
- Enzymatic solution for recycled fibres
- Papermaking potential of recycled fibre
- Differences between virgin and recycled fibre
- Repeated (manifold) recycling experiments
- Multiple papermaking with recycled fibres
- Modelling of fibre age distribution
- Special request of recycled fibre furnish in papermaking
- Effects of recycled fibre in papermaking
- Challenges of increased recycled fibre utilisation
Authors & references
Author:
Hans Putz
References:
- Lucas, R. and Williams, T., Winding problems associated with recycled fibres and additives in today’s papers. Tappi Finishing & Converting Conference, TAPPI PRESS, Atlanta, 1997
- Fernandez, C. and Garnier, G., Retention of Fatty Acid Soaps During Recycling. Part I: A Study Using Packed Beds of Pulp Fibres. J. Pulp Paper Sci. 23(1997) No. 4, p. J144J152
- Larson, A., Stenius, P. and Odberg, L., Surface Chemistry in Flotation Deinking. Part II. Svensk Papperstidn. 87(1985) No. 18, p. J165J169
- Haynes, D. and Marcoux, H., Evaluation of fatty acid carryover in North American newsprint deinking mills. CPPA 4th Research Forum on Recycling, Quebec, 1997
- Holmbäck, Å., Analys av fettsyratvålar och vedharts i en returpappersanläggning. M.Sc. Thesis, Åbo Akademi, Faculty of Chem. Eng., Turku, Finland, 1995
- Krüger, E., Göttsching, L. and Mönch, D., Verhalten fixierter Störstoffe im Recyclingprozeß. Wochenbl. Papierfabr. 125(1997) No. 20, p. 986991
- Sjöström, L. and Ödberg, L., Influence of Wet-End Chemicals on the Recyclability of Paper. Das Papier 51(1997) No. 6A, p. V69V73
- Grau, U., Schuhmacher, R. and Kleemann, S., Einfluß des Recyclings auf die Wirksamkeit von Trockenverfestigern. Wochenbl. Papierfabr. 124(1996) No. 17, p. 729735
- Ackermann, C. and Putz, H.-J., Unpublished INGEDE Project. Darmstadt, Germany, 1997
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This page has been updated 16.11.2021