COMPOSITION FOR COMPLEX SHEET WITH THERMAL DISSIPATION, EMI SHIELDING AND ABSORPTION IN TARGET FREQUENCY RANGE, AND PRODUCTS MANUFACTURED THEREFROM

摘要

A composition for a composite sheet is provided to realize maximized absorptivity at a specific frequency range, while showing high electron wave-shielding property and heat emission property, even in the presence of a low amount of fillers. A composition for a composite sheet comprises: 70-90 wt% of fillers containing 50-90 wt% of soft magnetic metal powder and 10-50 wt% of conductive metal powder; and 10-30 wt% of a polymer matrix resin, wherein the soft magnetic metal powder is sheet-like powder having an aspect ratio of 27.8-37.5, and the conductive metal powder is fibrous powder. The soft magnetic metal powder is at least one selected from the group consisting of Permalloy, Sendust, Ni-Zn ferrite, Mn-Zn ferrite, carbonyl iron, Fe-Si-based alloys and Molypermalloy.