Particle boards of size 250 mm×250 mm and 12 mm thick with 0.9 g/cm{sup}3 density were made using coir pith, a waste disposed from the coir fibre industries, of 0.45, 0.80, 1.20 and 2.10 mm particle size with phenol formaldehyde and urea formaldehyde resins. The response to the process variables, viz., proportion of resin, curing temperature and curing duration were found to follow a second-order model for the modulus of rupture of the boards. The higher strength characteristics were found for the boards made from the larger particle size of the coir pith and higher levels of the process variables. The levels of the variables, proportion of resin, curing temperature and curing duration of 16.7%, 138℃ and 26 mm, respectively, were found to be optimum for phenol formaldehyde resin. The levels of proportion of resin, curing temperature and curing duration of 20.4%, 139℃ and 17 mm, respectively, were optimum for the urea formaldehyde resin.
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机译：使用厚度为0.9 g / cm {sup} 3的250 mm×250 mm尺寸和12 mm厚，密度为0.9 g / cm {sup} 3的刨花板，该纤维是从椰壳纤维工业丢弃的，粒度为0.45、0.80、1.20和2.10 mm，苯酚甲醛和脲醛树脂。发现对工艺变量的响应，即树脂的比例，固化温度和固化持续时间遵循板的断裂模量的二阶模型。对于由较大的椰壳纤维颗粒尺寸和较高的工艺变量水平制成的板，发现了较高的强度特性。发现变量水平，树脂比例，固化温度和固化时间分别为16.7％，138℃和26 mm，是酚醛树脂的最佳选择。脲醛树脂的最佳树脂比例，固化温度和固化时间分别为20.4％，139℃和17 mm。
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