Furnish moisture content, resin nonvolatile content, and assembly time effects on properties of mixed hardwood strandboard

The objective of this research was to investigate the effects of three levels each of furnish moisture content (MC) (2%, 5%, 8%), resin nonvolatile content (50.8%, 54.8%, 58.8%), and assembly time (0 min., 20 min., 40 min.) on the strength (modulus of rupture (MOR) and internal bond (IB)) and dimensional stability (thickness swell (TS), linear expansion, and water absorption) of strandboard panels made from a combination of mixed hardwoods (60% sweetgum, 40% hackberry, mixed oak species, and hickory). MOR and IB were both significantly affected by furnish MC and resin solids percent, increasing with decreasing levels of each. TS increased significantly with increasing levels of furnish MC and resin solids percent. An ovendry-vacuum/pressure/soak cycle resulted in significant reductions in MOR and IB. Assembly time was not significant for any measured property. Linear expansion was not affected by any treatment.

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