the effect of vine pruning fibers content and press time on some functional properties and surface roughness of medium density fiberboard (mdf)

in this research the possibility of vine pruning fibers in combination with wood fibers was studied in order to fabricate medium density fiberboard. vine pruning fibers content in three levels of 0/100, 30/70 and 60/40 (weight percent) and press time in three levels of 4, 5 and 6 minutes were as variable factors. one layer panels with a density of 0.65 g/cm3 and thickness of 15 mm were made. the physical and mechanical properties of panels including modulus of rupture (mor), thickness swelling (ts) as well as surface roughness (ra, rz, and rq) were measured. results showed that with increasing of vine pruning fibers up to 30%, surface roughness and ts of panels increased and then decreased when the vine pruning fibers increased up to 60% fibers. mor was reduced with increasing of vine pruning fibers up to 60%. increasing press time had no significant effect on surface roughness and the physical and mechanical properties of panels.