Composite for shielding electromagnetic interference, manufacturing method of the same, and sheet comprising with the same

摘要

The present invention relates to a manufacturing method of a sheet for electromagnetic suppression comprising the following steps: a) mixing 30-38 wt% of polyester or polyamide synthesis and 60-68 wt% of solvent and manufacturing condensation compositions by adding 1.5-3.0 wt% of hardener in that; b) adding organic solvent and surfactant into a Mill and wet-milling the same at 600-800 and manufacturing slurry by adding and stirring 800-950 parts by weight of metal powder coated by conductive metal or obtained by a heat process for 100 parts by weight of polyamide synthesis or polyester into the condensation compositions; c) coating the mixed slurry mixture onto a releasing film and manufacturing a sheet shaped perform; d) and inserting the perform into a hot-press and compressing and hardening the same. The sheet for electromagnetic suppression obtained by the manufacturing method has high density and permeability compared to a conventional sheet obtained by a conventional technology, thereby improving the competitiveness to be used as a sheet for electromagnetic suppression.