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Dry chips versus green chips as furnish for medium-density fiberboardAuthor(s): Paul H. Short; George E. Woodson; Duane E. Lyon
Source: Forest Products Journal, Vol. 28(3): 33-38
Publication Series: Miscellaneous Publication
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DescriptionThe fiber characteristics and the physical and mechanical properties of medium-density fiberboard (MDF), manufactured with pressure-refined fiber from green and partially dried raw material, were analyzed to determine if dry wood chips made a better furnish than green wood chips. Pressure-refining dry material produced coarser fiber than those obtained from green material at the same refiner conditions. This was true for both loblolly pine and mixed hardwood material. Several important properties were shown to be affected by the Mc of the chips prior to pressure refining. Fore the mixed hardwood furnish, partially drying chips significantly improved IB strength of the fabricated panels. MOR, MOE, and dimensional properties were imdependent of initial chip MC. Partially drying softwood chips significantly improved MOr, IB, water absorption and thickness swelling of the fabricated panels, however MOE and linear expansion were adversely affected. I t was concluded that partially drying lob.olly pine chips prior to pressure-refining improves the overall quality of the MDF panels.
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CitationShort, Paul H.; Woodson, George E.; Lyon, Duane E. 1978. Dry chips versus green chips as furnish for medium-density fiberboard. Forest Products Journal, Vol. 28(3): 33-38
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