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Wood fibreboard paraffin hydrophobization and the impact of this treatment on the board surface finishing quality

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Języki publikacji
EN
Abstrakty
EN
Wood fibreboard paraffin hydrophobization and the impact of this treatment on the board surface finishing quality. The aim of this paper is to analyse the causes of surface treatment defects in commercially produced wood fibreboards (FB). The analysis of: the obtained (measured and calculated) thermodynamic characteristics and of the results of microscopic examinations demonstrated that the excessive FB hydrophobization with paraffin may cause the paraffin to release from the FB surface and to migrate into the first primer layer. For the sanded FBs, similar paraffin migration was also observed into the second primer layer. This entailed lowered drying rate for the coating materials applied on FB, lower adhesion of the coating materials to the substrate and also lower adhesion between the particular coating layers applied. At the same time, the occurring frequency of surface treatment defects increased.
Twórcy
autor
  • Department of Wood Science, Faculty of Wood Sciences and Technology, Technical University in Zvolen, Slovak Republic
Bibliografia
  • 1. CAI, L., FU, Q., NIU, M. et al. 2016: Effect of chlorinated paraffin nanoemulsion onthe microstructure and water repellency of ultra-low density fiberboard. BioResources,11(2): 4579-4592.
  • 2. GARAI, R. M., SÁNCHEZ, I. C., GARCIA, R. T. et al. 2005: Study on the Effect ofRaw Material Composition on Water‐Repellent Capacity of Paraffin Wax Emulsionson Wood. J. Disper. Sci. Technol., 26(1):918
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  • 4. KÚDELA, J, JAVOREK, Ľ., MRENICA, L. 2016. Influence of milling and sanding on beech wood surface properties. Part II. Wetting and thermo-dynamical characteristicsof wood surface. Ann. WULS-SGGW, For and Wood Technol., No. 95: 154-158
  • 5. KÚDELA, J., LIPTÁKOVÁ, E. 2006: Adhesion of coating materials to wood. J.Adhesion Sci. Technol., 20(8): 875-895.
  • 6. LIPTÁKOVÁ, E., KÚDELA, J. 1994: Analysis of wood-wetting process.Holzforschung, 48(2): 139–144.
  • 7. LIPTÁKOVÁ, E., KÚDELA, J. 2002: Study of the system wood – coating material.Part 2. Wood – solid coating material. Holzforschung 56(5): 547–557.
  • 8. NEUMANN, A. W., GOOD, R. J., HOPPE, C. J., SEJPAL, M.1974. An equation ofstate approach to determine surface tensions of low–energy solids from contact angles.Colloid Interface Sci., 49(2): 291–303.
  • 9. ROFFAEL, E., SCHNEIDER, T., DIX, B., BUCHHOLZ, T. 2005: On paraffin sizingof medium density fiberboards (MDF). Part 1: Influence of the chemical compositionof paraffin and type of emulsifier on the hydrophobic properties of MDF. Holz alsRoh- und Werkstoff, 63(3):192-203.
  • 10. STN 67 3052, 1980: Stanovenie zasychania náterových látok.
  • 11. SUCHSLAND, O. 2004: The swelling and Shrinking of wood. A practical technologyprimer. Madison: Forest Products Society, 189 p.
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  • 13. TORKAMAN, J. 2008: Reduction of Water Absorption and Swelling of Fiberboard.In.: International Conference on Durability of Building Materials and Components.Istanbul, Turkey 11-14 May 2008, pp. 1-5.
  • 14. WITTE, J. 1999: Flourované povrchové aktívní látky pro barvy a nátěry. In.: Novépoznatky v oboru nátěrových hmot a jejích aplikací. Pardubice: Univerzita Pardubice,pp. 198-205.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-f76459ed-597f-4472-852d-9e8b864b07c1
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