Author : Bui Xuan

Summary : The study sought to determine the following : (1) The effect of rice hull filler on the viscosity of the glue mixture; (2) The effect of rice hull filler on the quality of the glue bond; (3) The ash content of rice hull powder; (4) The effect of rice hull filler on the dullness of the cutting tool. Findings disclosed that rice hull powder is a suitable filler for phenol formaldehyde glue in making plywood. The amount of rice hull filler can be used up to 30 to 40 percent the weight of liquid phenol formal dehyde glue and still passes the tests as set forth in the Philippine trade standard for export plywood. In the experiments, Mayapis, Shorea squamata Turcz (Dyer) veneers having an average MC of 10 percent with a range of 9 to 11 percent were glued together to make three-ply plywood panels with a phenol formaldehyde resin and different percentages of rice hull powder filler.