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Effect of steam pressure refining and resin levels on the properties of UF-bonded red maple MDF
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1993
Year
Materials ScienceResin LevelsEngineeringRed Maple ChipsMechanical EngineeringWood QualitySteam Pressure RefiningWood StructureWood FibreWood TechnologyWood ModificationRefining PressuresRed Maple
A study was undertaken to determine the influence of steam-pressure-refining levels on red maple (Acer rubrum L.) wood chips fabricated into medium density fiberboard (MDF) test boards using four urea-formaldehyde resin levels. Red maple chips were fiberized using a pressurized, double-disk refiner operating at six refining pressures (50, 60, 70, 80, 90, and 100 psi). MDF test boards were produced using the six groups of refined fibers at four urea-formaldehyde resin contents. Static bending (MOE and MOR), internal bond (IB), water absorption, and thickness swell properties were measured. An increase in refining pressure did not significantly affect MDF strength or dimensional stability properties (...)