METHOD OF PREPARING ELECTROMAGNETIC ABSORBING MATERIAL USING MAGNETIC POWDER COATED WITH POLYMER RESIN AND ELECTROMAGNETIC ABSORBING SHEET PREPARED THEREBY

摘要

A method of preparing an electromagnetic absorbing material using magnetic powder coated with a polymer resin is provided to improve a filling rate of magnetic material, especially metal powder on a flake, and to ensure electromagnetic absorption performance by being arranged with magnetic powder along the cross direction of a sheet. A method of preparing an electromagnetic absorbing material comprises (a) a step for coating the mixed liquid resin including a binder resin and solvent with magnetic powder; (b) a step(50) drying the magnetic powder coated with the mixed resin; and (c) a step(70) for molding an electromagnetic wave absorber by using the dried magnetic powder.