Influence of wet-end variables on the sizing efficiency of ASA on fine papers produced with Eucalyptus globulus kraft pulps
Source abstract
Abstract
"The purpose of paper sizing is to make paper more resistant to liquid penetration. Alkenyl succinic anhydride (ASA) is a synthetic sizing agent usually used in alkaline papermaking. ASA has a fast curing size, but it can lose its ability if it is in contact with water. This work studies the influence of dissolved Ca2+ and HCO3¯ ions in the papermaking stock, the effect of precipitated calcium carbonate (PCC), and the influence of pH and temperature on ASA sizing efficiency using bleached Eucalyptus globulus kraft pulps. Two different types of ASA (designated P and UP) and three different emulsions of ASA were used: starch + ASA P, starch + ASA UP, and starch + ASA UP + surfactant. We concluded that a high concentration of dissolved Ca2+ ions in furnish diminished the sizing efficiency of ASA. Depending on the type of ASA, concentrations below 300 or 500 ppm did not reduce the sizing efficiency. The amount of dissolved HCO3¯ ions in furnish does not determine the sizing degree of ASA. According to our results, it is possible to work with relatively high PCC loading levels. If it is necessary work with high filler loading levels, however, it is better to increase the ASA concentration in stock. The pH and temperature are the limiting variables of the process; high temperature with high pH reduces the sizing performance of ASA."
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Advanced Cellulose Research Studies · Lignin and Wood Chemistry · Material Properties and Processing
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (10)
Show source-provided references
1. Neimo, L. in Papermaking Science and Technology, Papermaking chemistry, Helsinki, TAPPI PRESS, 1999, Chapter 7.
2. Hodgson, K.T., Appita J. 47(5): 402(1994).
3. Araújo, J.A., Oliveira I., Massoquette A., et al., Proceedings of the Associação Brazileira Técnica de Celulose e Papel (ABTCP) 30th Pulp and Paper Annual Meeting, ABTCP, São Paulo, Brazil, 1997, p. 527.
4. Farley, C.E. and Wasser, R.B., in The Sizing of Paper (Reynold, W.F. Ed.) 2th edn., TAPPI PRESS, 1989, pp. 51-61.
5. Wasser, R.B., J. Pulp Paper Sci., 13(1): 29(1987).
6. Savolainen, R.M., Proceedings of the 1996 TAPPI Papermakers Conference, TAPPI PRESS, Atlanta, p. 289.
7. Velho, J., in Mineral fillers for paper Why, What, How (Tecnicelpa Technical books Ed.), Tecnicelpa - Portuguese Association of the Pulp and Paper Technicians, 2003, pp. 185-188.
8. Gess, J.M., Tappi 64(1): 35(1981).10.2524/jtappij.35.8_e1b ↗
9. Cates, R.E., Dumas, D., and Evans, D., in The Sizing of Paper (Reynold, W.F., Ed.) 2nd edn., TAPPI PRESS, 1971, Chap. 12.
10. Zhmud, B., Seppänen, R., and Tiberg, F., Proceedings of the Pira 2001 Scientific & Technical Advances in the Internal and Surface Sizing of Paper and Board, Pira International, Leatherhead, UK, paper 6.