A kind of composite buffering material was made by filling the voids of honeycomb paperboard with polyurethane. Static compression tests were performed to evaluate the energy absorption capacity of the material. Based on the tests results,the mechanical behaviors of the material under different conditions were analyzed, the inherent influencing laws of some factors on the material’s static buffering performance were obtained. It was shown that the elasticity limit (increased from 0.224 0 MPa to 0.542 2 MPa) and yield stress (about 3~4 times the yield stress of the honeycomb paperboard) of composite material increased obviously.Compression strength and yield stress varied inversely with the void diameter,and directly with thickness of the honeycomb paperboard and composite material.The influence of void diameter on the mechanical properties of the composite material was very significant.The absorbed energy of the composite material was about 1.85 times the total absorbed energy of the honeycomb paperboard and polyurethane.The energy absorption efficiency and the ideal energy absorption efficiency of the composite material were better than those of honeycomb paperboard and polyurethane.
