PRODUCTION OF RADIO WAVE ABSORBING MATERIAL

摘要

PURPOSE:A radio wave absorbing material which can effectively absorb radio waves regardless of their directions of incidence, prepared by making a mixture comprising a powdered elastomer, a ferrite powder and an electroconductive fiber into a sheet. CONSTITUTION:100pts.wt. powdered elastomer (e.g., chloro-sulfonated polyethylene powder or nitrile rubber powder) is mixed with 100-500pts.wt. ferrite powder (BaO.6Fe2O3 powder) and 2-150pts.wt. 0.5-5mm.-long electroconductive fiber (e.g., brass fiber) in a state in which substantially no shearing force is exerted on the mixture. A sheet which is used as a radio wave absorbing material is obtained by molding the obtained mixture under application of heat and pressure.