EXPANDED GRAPHITE DISPERSED COMPOSITE, METHOD FOR PRODUCING THE SAME AND CRASH PAD USING THE SAME

摘要

PURPOSE: A manufacturing method of a composite material dispersed with expanded graphite is provided to be able to provide a composite material in which the electromagnetic wave shielding with an increased dispersibility of the expanded graphite, and the heat radiation function are added. CONSTITUTION: A manufacturing method of a composite material dispersed with expanded graphite comprises a step of dispersing expanded graphite in a polymer matrix by melting and mixing a mixture of a dispersion material including expanded graphite and the polymer matrix in an extruder so that 5-30 parts by weight of expanded graphite are contained in 100.0 parts by weight of the polymer matrix (S20). The polymer matrix includes polypropylene and a low density polyethylene at a weight ratio of 65:35 to 75:25. [Reference numerals] (S20) Disperse dispersing material containing expanded graphite on a polymer matrix; (S30) Add glycerol monostearate and talc in the polymer matrix