Thermoplastic composite material composition having excellent electromagnetic radiation shielding performance

A thermoplastic composite material composition comprising:

• a base resin;
• a first filler comprising a master batch comprising a thermoplastic resin and a carbon material;
• a second filler comprising a non-carbon material;
• a carbon fiber;
• a flow improver;
• and
• a high-density polyethylene resin;
• wherein, based on the total weight of the thermoplastic composite material composition, the thermoplastic composite material composition comprises 6 wt % to 20 wt % of the base resin,
• wherein the carbon fiber is surface-treated with one or more substances selected from the group consisting of:
• a silane group, an epoxy group, and an imide group,
• wherein, based on the total weight of the thermoplastic composite material composition, the thermoplastic composite material composition comprises:
• 50 wt % to 67 wt % of the first filler;
• 2 wt % to 8 wt % of the second filler;
• 2 wt % to 4 wt % of the flow improver;
• and
• 2 wt % to 4 wt % of the high-density polyethylene resin, and
• wherein the master batch comprises 20 to 40 parts by weight of the carbon material per 100 parts by weight of the thermoplastic resin.