The invention provides a low-dielectric-constant electromagnetic-shielding thermally conductive polyetheretherketone composite material and a preparation method thereof, belonging to the technical field of polymer material processing. The composite material comprises the following raw materials: polyetheretherketone resin, low-dielectric glass fiber, conductive filler, low-dielectric filler and additives. The preparation method comprises the following steps: S1. Uniformly mixing the polyetheretherketone resin, low-dielectric filler, conductive filler and additives to obtain a mixed material; S2. Feeding the mixed material into a twin-screw extruder from the main feeding port, and feeding the low-dielectric glass fiber into the twin-screw extruder from the side feeding port, then uniformly mixing the mixed material and the low-dielectric glass fiber in the screw chamber of the twin-screw extruder to obtain a secondary mixed material; S3. Heating and melting the secondary mixed material, extruding and pelletizing, and sieving to obtain the polyetheretherketone composite material. The technical solution provided by the invention enables the composite material to have low dielectric constant, strong electromagnetic shielding and high thermal conductivity at the same time.
Area Code: CN
Application Number: CN202411543019.0
