Skip to content
Licensed Unlicensed Requires Authentication Published by De Gruyter June 1, 2005

Effect of juvenile wood on strength properties and dimensional stability of black spruce medium-density fiberboard panels

Jun Li Shi, Shu Yin Zhang and Bernard Riedl
From the journal


Strength properties and dimensional stability of medium-density fiberboard (MDF) panels made from black spruce (Picea mariana [Mill.] BSP.) 0–20, 21–40, and over 40 year old fiber were studied. An analysis of covariance (ANCOVA) was performed to examine the differences in modulus of rupture (MOR), modulus of elasticity (MOE), and thickness swell (TS) of the three types of panels, while panel density was treated as a covariate in order to adjust the mean values that were partly attributed to panel density. The results indicate that MOR, internal bond (IB), and water absorption of MDF panels made from 0–20 year old fiber, which contained 100% juvenile wood, were significantly superior to those of panels made from 21–40 and over 40 year old fiber; but linear expansion (LE) of MDF panels made from 0–20 year old fiber was significantly larger than that of panels from the other two age classes. The differences in MOR, IB, water absorption, and LE between panels made from 21–40 and over 40 year old fiber were not significant. The comparisons of panel MOE and TS were relatively dependent on panel density due to existence of interactions among the three age groups.


Corresponding author. Department of Wood Science, Laval University, Québec, G1K 7P4, Canada


ANSI standard (2002) A208.2-2002. Medium density fiberboard (MDF) for interior application.Search in Google Scholar

ASTM standard (2001) D 1037-99. Evaluating properties of wood-based fiber and particle panel materials.Search in Google Scholar

Barbour, R.J. (1987) A preliminary study of the wood properties of fast-grown black spruce, Picea mariana, from Quebec. Can. For. Serv. No. 33.Search in Google Scholar

Barbour, R.J., Sabourin, D., Chiu, E. (1989) Evaluation of basic wood properties of black spruce from Quebec part II. Can. For. Serv. No. 31.Search in Google Scholar

Bendtsen, B.A., Senft, J. (1986) Mechanical and anatomical properties in individual growth rings of plantation-grown eastern cottonwood and loblolly pine. Wood Fiber Sci.18(1):23–38.Search in Google Scholar

Dix, B., Thole, V., Marutzky, R. (1999) Poplar and eucalyptus wood as raw material for wood-based panels. Eurowood Tech. Workshop Proc.: Industrial End-Uses of Fast-Grown Species. CNR/IRL and CNR/ITL. Florence. pp.93–102.Search in Google Scholar

Groom, L.H., Mott, L., Shaler, S.M., Pesacreta, T. (1998) Effect of fiber surface and mechanical properties on the stiffness and strength of medium-density fiberboard. Microfibril Angel in Wood, Proc. of the IAWA/IUFRO International Workshop on the Significance of Microfibril Angel to Wood Quality, Westport, New Zealand.Search in Google Scholar

Hsu, W.E. (1997) Wood quality requirements for panel products. Proc. of CTIA/IUFRO Inter. Wood Quality Workshop, Timber Management toward Wood Quality and End-Product Value. Forintek Canada Corp. Quebec City, Canada. I-7/10.Search in Google Scholar

Huitema, B.E. The Analysis of Covariance and Alternatives. Jone Wiley & Sons, New York, 1980. pp. 274–275.Search in Google Scholar

Li, M., Gertjejansen, R.O., Ritter, D.C. (1991) Red pine thinnings as a raw material for waferboard. Forest Prod. J.41(7/8):41–43.Search in Google Scholar

Maloney, T.M. (1986) Juvenile wood-Problems in composition board products. Proc. of a cooperative Technical Workshop, Juvenile Wood: What does it mean to forest management and forest products? Forest Prod. Res. Soc., Madison, WI. pp. 72–74.Search in Google Scholar

Maloney, T.M. Modern Particleboard and Dry-Process Fiberboard Manufacturing. Miller Freeman, San Francisco, CA, 1993.Search in Google Scholar

Olson, B.D. Developing wood composites using small diameter timber resources from dense, stagnant stands. M.S. thesis. Wash. State Univ., Pullman, WA, 1996.Search in Google Scholar

Panshin, A.J., DeZeeuw, C. Textbook of Wood Technology. 4th ED. McGraw-Hill Book Co., New York, 1980.Search in Google Scholar

Peter, J.J., Bender, D.A., Wolcott, M.P., Johnson, J.D. (2002) Selected properties of hybrid poplar clear wood and composite panels. Forest Prod. J.52(5): 45–54.Search in Google Scholar

Pugel, A.D., Price, E.W., Hse, C.Y. (1989) Composites from southern pine juvenile wood. Part 1. Panel fabrication and initial properties. Forest Prod. J.40(1):29–33.Search in Google Scholar

Pugel, A.D., Price, E.W., Hse, C.Y. (1990) Composites from southern pine juvenile wood. Part 2. Durability and dimensional stability. Forest Prod. J.40(3):57–61.Search in Google Scholar

SAS Institute, Inc. (1990) SAS/STAT User's guide. Cary, NC.Search in Google Scholar

Shupe, T.F., Hsu, C.Y., Choong, E.T., Groom, L.H. (1999) Effect of silvicultural practice and wood type on loblolly pine particleboard and medium density fiberboard properties. Holzforschung53(2):215–222.10.1515/HF.1999.036Search in Google Scholar

Tappi standard (1995) T233cm-95. Fiber length of pulp by classification.Search in Google Scholar

Wasniewski, J.L. (1989) Evaluation of juvenile wood and its effect on Douglas fir structural composite panels. Proc. 23rd Wash. State Univ. Inter. Particleboard-Composite Materials Symp. Pullman, WA. pp. 161–175.Search in Google Scholar

Zhang, S.Y. (1998) Effect of age on the variation, correlations and inheritance of selected wood characteristics in black spruce (Picea mariana). Wood Sci. Tech.32:197–204.Search in Google Scholar

Zhang, S.Y., Chauret, G. (2001) Impact of initial spacing on tree and wood characteristics, product quality and value recovery in black spruce (Picea mariana). Canadian For. Serv. Report No. 35, Forintek Canada Corp., Sainte-Foy, Québec.Search in Google Scholar

Zobel, B.J., Sprague, J.R. Juvenile Wood in Forest Trees. Springer-Verlag. Berlin, 1998.10.1007/978-3-642-72126-7Search in Google Scholar

Published Online: 2005-06-01
Published in Print: 2005-01-01

©2004 by Walter de Gruyter Berlin New York