A compound insulation plastic board of filled corn rod broken powder the polyurethane foam was invented, preliminary to decide its formula and preparation technology, according to the test results of different corn rod broken powder size (0 ~ 0.45 mm and 0.45 ~ 1.5 mm and 1.5 ~ 4 mm three kinds of specifications) and filling quantity of polyurethane foam plastics density, compression strength and thermal conductivity, and the influence of the different filling quantity and grain size of polyurethane foam plastic foam time, foam molding effect. The results show that as the corn stalk broken powder particle size must, along with the increase of filling quantity, filling, corn stalk broken powder of polyurethane foam insulation material density and the increase, but the compression strength drops, when corn rod broken powder particle size of 0.45 ~ 1.5 mm, filling content is 30%, the preparation of complex polyurethane foam plastic board compression strength (compression 50%) for 185 kPa, heat conduction coefficient is 0.038 W/m • K, variation of size (－40 ~＋ 70 ℃) for plus or minus 1%, can satisfy the channel lining seepage control project for expansion in the performance requirements of destruction. According to the calculation and don't fill corn rod broken powder of polyurethane foam plastic board compared, the hybrid foam insulation board can reduce the cost of about 25%, and be able to make full use of agricultural production waste, reduce the waste away or burned the environmental pollution.
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