According to the three levels and three factors an orthogonal experiments L9(34) is designed, in which the thermalconductivities of experimental WPU membranes samples aretested. The results are shown in Table 3 and Fig. 2. Wherein, theKn(n = 1,2,3) values are computed from the results of thermalconductivity() in Fig. 2/Table 1 shown. About for Kn(monomer),