A Procedure to Determine Thickness Swell Distribution in Wood Composite Panels
Keywords:Medium density fiberboard, oriented strandboard, particleboard, thickness swell, vertical density distribution
AbstractA procedure was developed to determine the thickness swell distribution of wood composite panels, based on the vertical density distributions from before and after the water soak test. The procedure used a linear relationship of the density between adjacent density data points in the vertical density distribution, and it assumed a constant weight of an individual horizontal layer after swell. A computer algorithm was developed for this estimation. The procedure was used to examine the thickness swell distribution of medium density fiberboard, oriented strandboard, and particleboard. Thickness swell distribution in relation to the layer density was discussed.
American Society For Testing and Materials. 1994. Standard test methods for evaluating properties of wood-base fiber and particle panel materials. Philadelphia, PA.nDavis, W. C. T. 1989. The effect of furnish moisture content, press closure rate, and panel density on thickness swell and the vertical density profile of a mixed hardwood flakeboard. M.S. thesis, University of Tennessee, Knoxville, TN. 118 pp.nHalligan, A. F. 1970. A review of thickness swelling in particleboard. Wood Sci. Technol. 4(4):301-312.nHsu, W. E., W. Schwald, J. Schwald, and J. A. Shields. 1988. Chemical and physical changes required for producing dimensionally stable wood-based composites. Part 1: Steam pretreatment. Wood Sci. Technol. 22(3): 281-289.nKelly, M. W. 1977. Critical literature review of relationships between processing parameters and physical properties of particleboard. Gen. Tech. Rep. FPL-20. USDA Forest Service, Forest Products Laboratory, Madison, WI.nStrickler, M. D. 1959. Effect of press cycle and moisture content on properties of Douglas-fir flakeboard. Forest Prod. J. 9(7):203-205.nSuchsland, O. 1962. The density distribution in flake-board. Q. Bull., Mich. Agric. Exp. Sta., Michigan State University, E. Lansing, MI. 45(11):104-121.nSuo, S. 1991. Computer simulation modeling of structural particleboard properties. Ph.D. thesis, University of Minnesota, St. Paul, MN. 158 pp.nWang, P., J. Shi, W. Xu, and J. Guo. 1988. Reducing board density and improving dimensional stability of particleboard. Unpublished Project Progress Report. The Chinese Academy of Forestry, Beijing, China.nWinistorfer, P. M., W. C. Davis, and W. W. Moschler. 1986. A direct scanning densitometer to measure density profiles in wood composite panel products. Forest Prod. J. 36(11/12):82-86.nWinistorfer, P. M., D. L. McFarland, and R. C. Slover. 1992. Performance of ten wax formulations in OSB manufacture. Pages 236-250 in T. M. Maloney, ed. Proceedings of the 26th International Particleboard/Composite Materials Symposium. Washington State University, Pullman. WA.nWinistorfer, P. M., T. M. Young, and E. Walker. 1995. Modeling and comparing vertical density profiles. Wood Fiber Sci. (in press).nYoungquist, J. A., R. M. Rowell, and A. Krzysik. 1986. Mechanical and dimensional stability of acetylated aspen flakeboard. Holz Roh- Werkst. 44:453-457.n
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