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Dimensional stability of MDF panels produced from heat-treated fibres

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Published/Copyright: May 3, 2006
Holzforschung
From the journal Volume 60 Issue 3

Abstract

The objectives of this study were to improve the dimensional stability of medium-density fibreboard (MDF) by heat treatment and to determine the effects of the treatment on the mechanical properties and vertical density profile of the panels. MDF panels were produced from untreated fibres and fibres treated at two different temperatures (150 and 180°C) for 15, 30 and 60 min. Panels produced from heat-treated fibres showed an important reduction in thickness swelling and water absorption after water soaking. Linear expansion and contraction were not improved by the treatment. Thickness swelling after repeated cycles of adsorption and desorption increased, while thickness shrinkage under the same conditions was not changed by the treatment. The springback of panels after repeated cycles of adsorption and desorption was not improved, either. Statistical analyses did not show significant differences in the modulus of rupture, modulus of elasticity and internal bond strength of panels following heat treatment. No significant effect was found for the vertical density profile of panels following heat treatment, although the profiles for panels produced from heat-treated fibres were flatter than those produced from untreated fibres.

Keywords: dimensional stability; heat treatment; medium-density fibreboard; MDF
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Corresponding author. Centre de Recherche sur le Bois (CRB), Département des Sciences du Bois et de la Forêt, Université Laval, Québec, Canada G1K 7P4 Tel.: +1-418-656-2131 ext. 12561 Fax: +1-418-656-5262

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Published Online: 2006-05-03
Published in Print: 2006-05-01

©2006 by Walter de Gruyter Berlin New York

Articles in the same Issue

  1. Brightness stabilisation of bleached high-yield pulps by novel sulfur-containing inhibitors
  2. Application of UV-Vis and resonance Raman spectroscopy to study bleaching and photoyellowing of thermomechanical pulps
  3. Characteristics of NAEM salt-catalyzed alcohol organosolv pulping as a biorefinery
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  5. Calculation of the relative bonded area and scattering coefficient from sheet density and fibre shape
  6. Formic and acetic acids in archaeological wood. A comparison between the Vasa Warship, the Bremen Cog, the Oberländer Boat and the Danish Viking Ships
  7. Time-domain 1H NMR characterization of the liquid phase in greenwood
  8. Chemical reaction of alkoxysilane molecules in wood modified with silanol groups
  9. Dimensional stability of MDF panels produced from heat-treated fibres
  10. Multivariate modeling of MDF panel properties in relation to wood fiber characteristics
  11. Viscoelastic behaviour of solid wood under compressive loading
  12. The creep of wood destabilized by change in moisture content. Part 3: The influence of changing moisture history on creep behavior
  13. Air permeability of aspen veneer and glueline: Experimentation and implications
  14. Fracture cleavage analysis of PVAc latex adhesives: Influence of phenolic additives
  15. Effect of a waterproof agent on gypsum particleboard properties
  16. Effects of semi-isostatic densification on anatomy and cell-shape recovery on soaking
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  18. The effect of CaCl2 on growth rate, wood decay and oxalic acid accumulation in Serpula lacrymans and related brown-rot fungi
https://doi.org/10.1515/HF.2006.045
Keywords for this article
dimensional stability; heat treatment; medium-density fibreboard; MDF

Articles in the same Issue

  1. Brightness stabilisation of bleached high-yield pulps by novel sulfur-containing inhibitors
  2. Application of UV-Vis and resonance Raman spectroscopy to study bleaching and photoyellowing of thermomechanical pulps
  3. Characteristics of NAEM salt-catalyzed alcohol organosolv pulping as a biorefinery
  4. Effect of poly(ethylene oxide) molecular mass on miscibility and hydrogen bonding with lignin
  5. Calculation of the relative bonded area and scattering coefficient from sheet density and fibre shape
  6. Formic and acetic acids in archaeological wood. A comparison between the Vasa Warship, the Bremen Cog, the Oberländer Boat and the Danish Viking Ships
  7. Time-domain 1H NMR characterization of the liquid phase in greenwood
  8. Chemical reaction of alkoxysilane molecules in wood modified with silanol groups
  9. Dimensional stability of MDF panels produced from heat-treated fibres
  10. Multivariate modeling of MDF panel properties in relation to wood fiber characteristics
  11. Viscoelastic behaviour of solid wood under compressive loading
  12. The creep of wood destabilized by change in moisture content. Part 3: The influence of changing moisture history on creep behavior
  13. Air permeability of aspen veneer and glueline: Experimentation and implications
  14. Fracture cleavage analysis of PVAc latex adhesives: Influence of phenolic additives
  15. Effect of a waterproof agent on gypsum particleboard properties
  16. Effects of semi-isostatic densification on anatomy and cell-shape recovery on soaking
  17. Analytical tools to predict changes in properties of oriented strandboard exposed to the fungus Postia placenta
  18. The effect of CaCl2 on growth rate, wood decay and oxalic acid accumulation in Serpula lacrymans and related brown-rot fungi
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