Thermoplastic resin composition having excellent heat resistance and electromagnetic wave shielding ability, method for manufacturing same and injection-molded article manufactured therefrom
A thermoplastic resin and composition technology, applied in the direction of shielding materials, etc., can solve the problems of electromagnetic wave shielding performance and heat resistance not reaching the required level, and achieve the effect of excellent mechanical properties and high shielding efficiency
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[0083] Preparation method of thermoplastic resin composition
[0084] The preparation method of the thermoplastic resin composition having excellent heat resistance and electromagnetic wave shielding ability according to the present invention comprises: using an extruder at 250° C. to 320° C. and 250 to 350 rpm, to (a) 100 parts by weight of the thermoplastic resin , the thermoplastic resin comprises 80% by weight to 100% by weight of a base resin and 0 to 20% by weight of a reinforcing resin; (b) 2 to 60 parts by weight of linear carbon fibers having an average diameter of 3 to 15 μm; (c) 1 to 5 The BET specific surface area of parts by weight is 200 to 400m 2 / g of carbon nanofibrils; (d) 1 to 15 parts by weight of carbon nanosheets; and (e) 1 to 25 parts by weight of metal powder for the steps of melt kneading and extrusion. The thermoplastic resin composition prepared by using the method can have excellent electrical conductivity, impact strength, heat resistance, appea...
Embodiment 1 to Embodiment 6 and comparative example 1 to comparative example 4
[0117] According to the composition shown in Table 1 below, each component was fed into a twin-screw extruder, melt-kneaded and extruded at a temperature of 250° C. to 320° C. and a rotation speed of 300 rpm, and the discharged extruded The output is sheared by a granulator to obtain pellets. Then, the obtained pellets were injection molded using an injection machine (80 tons; Engel Co.) at an injection temperature (barrel temperature) of 250°C to 300°C and a molding temperature of 70°C to 100°C to prepare Physical properties of samples.
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