The influence of moisture of fiber mats on the properties of MDF boards

• Autorzy: Nicewicz D. , Monder S.
• Języki publikacji: EN

Abstrakty

EN

The study investigated the extent to which the properties of MDF boards change with changes in the moisture of fibers forming mats from 4.5 to 10.5%. MDF panels were produced in the laboratory with an assumed density of 660kg/m3 and a thickness of 12 mm. It has been found that it is possible to produce boards without their delamination in the whole range of humidity of fibers. The increased amount of water vapor in the mats when they are pressed is likely to influence better plasticization of the fibers, which translates to improved properties of the boards. Increasing moisture content from 6.5 to 10.5% increases the modulus of rapture by approx. 9%, the modulus of elasticity by approx. 7%, internal bonds by approx.30% and reduces swelling by approx. 22%.

Słowa kluczowe

EN

moisture of fiber mats; MDF properties

• Wydawca: Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
• Czasopismo: Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
• Rocznik: 2014
• Tom: No. 88
• Strony: 174--177
• Opis fizyczny: Bibliogr. 3 poz.

Twórcy

autor

Nicewicz D.

• Faculty of Wood Technology, Warsaw University of Life Sciences – SGGW

autor

Monder S.

• Faculty of Wood Technology, Warsaw University of Life Sciences – SGGW

Bibliografia

• 1. Ayrilmis N.2007: Effect of panel density on dimensional stability of medium and high density fiberboards. Journal Mater Science 42(20):8551–8557.
• 2. Cai Z. Muehl J. H, Winandy J., E. 2006: Effects of panel density and mat moisture content on processing medium density fiberboard. Forest Products Journal 56, (10) :20-25.
• 3. Thoemen H., Humphrey P.E. 2006:Modeling the physical processes relevant during hot pressing of wood-based composites. Part I. Heat and mass transfer. Holz als Roh- und Werkstoff 64: 1–10.