Hostname: page-component-8448b6f56d-xtgtn Total loading time: 0 Render date: 2024-04-23T20:22:31.024Z Has data issue: false hasContentIssue false
  • English
  • Français

Model Study of Paper Elasticity and Drying Restraints

Published online by Cambridge University Press:  16 February 2011

Kaarlo J. Niskanen
Kaarlo J. Niskanen*
Affiliation:
Paper Science Centre, The Finnish Pulp and Paper Research Institute, P.O.B. 70, SF-02150 Espoo, Finland.
Get access

Abstract

Experiments on laboratory paper sheets have indicated that under certain conditions the elastic modulus is inversely proportional to both the drying shrinkage and dimensional stability. Thus it appears that the elastic response of paper to mechanically and hygroscopically induced stresses is determined by the drying strain or shrinkage of the sheet. It is not clear, however, what effect the geometry of paper network and the properties of papermaking fibers have on the relationship between paper elasticity and drying restraints.

We have developed a model for the study of the elastic properties of paper as a function of the drying shrinkage. The model is based on the assumption that there exists a unique relationship between the elastic properties and dried-in compression of fiber. As a consequence, the elastic properties of a fiber depend on its orientation relative to the principal axes of the paper sheet.

The qualitative features obtained from the model calculations are consistent with experimental observations and independent of details of the elastic properties of fiber. It is clearly shown that no unique relationship exists between the drying strain and elastic modulus of the paper sheet. However, to a reasonable accuracy certain simple relatioships do exist that appear to be of general validity.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 197: Symposium U – Materials Interactions Relevant to the Pulp, Paper and Wood Industries , 1990 , 203
Copyright
Copyright © Materials Research Society 1990

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Wedel, G. L., TAPPI 72 (4), 93–97 (1989).Google Scholar
2. Shands, J. A., Genco, J. M., TAPPI 71 (9), 165–169 (1988).Google Scholar
3. Setterholm, V., Kuenzi, E. W., TAPPI 53 (10), 1915–1920 (1970).Google Scholar
4. Htun, M., Fellers, C., in Paper Structure and Properties, edited by Bristow, J. A. and Kolseth, P. (Marcel Dekker, Inc., New York, 1986), pp. 327–345.Google Scholar
5. Kenworthy, I. C., Pap. Technol. 5 (4), 359–368 (1964).Google Scholar
6. Perkins, R. W., Mark, R. E., in The Role of Fundamental Research in Paper Making, edited by Brander, J. (Mechanical Engineering Publications Ltd. London 1983), pp. 479–526.Google Scholar
7. Batten, G. L. Jr., Nissan, A. H., TAPPI 69 (10), 130–131 (1986); 70 (8), 117 (1987).Google Scholar
8. Bristow, J. A., Htun, M., Fellers, C., Rigdahl, M., TAPPI 70 (8), 115–116 (1987).Google Scholar
9. Schulgasser, K., Page, D. H., Composites Sci. Technol. 32 (4), 279–292 (1988).Google Scholar
10. Page, D. H., Tydeman, P. A., Hunt, M., in The Formation and Structure of Paper, edited by Bolam, F., B.P.B.M.A., London, 1962), pp. 171–193.Google Scholar
11. Page, D. H., Seth, R. S., TAPPI 63 (10), 99–102 (1980).Google Scholar
12. Baum, G. A., Shephard, D. R., Pers, K., T. R. Ave'Lallemant, TAPPI 67 (5), 100–104 (1984).Google Scholar
13. SST-250, Nomura Shoji Co., Tokyo, Japan.Google Scholar