Mazda Motor Corporation

Nippon Steel Chemical & Material Co., Ltd.

Kenji Hiramoto

Junichi Ogawa

Kazuhisa To

Nobuyoshi Kajioka

Toshiaki Miyanaga

The electrically conductive resin composition may contain matrix resin, coke powder, and carbon fiber. The volume mean particle diameter of the coke powder may be not less than 1 &#x3bc;m and not more than 500 &#x3bc;m. The content percentage of the coke powder in the electrically conductive resin composition may be not less than 1 wt % and not more than 60 wt %. The aspect ratio of the carbon fiber may be not less than 3 and not more than 1700. The content percentage of the carbon fiber in the electrically conductive resin composition may be not less than 0.5 wt % and not more than 10 wt %.

Electrically conductive resin composition and electromagnetic shielding material therewith

Provided is carbon material filler for an electromagnetic shield, which includes a graphitizable carbon material to be mixed into a molding material in order to absorb electromagnetic waves, the carbon material filler for an electromagnetic shield satisfying (1) to (3): (1) A spacing d002 of a 002 plane of the graphitizable carbon material measured through X-ray diffraction measurement (XRD) is at least 0.338 nm. (2) A relative intensity ratio (A/B) value between a peak intensity (A) of a '002 plane' detected when the graphitizable carbon material is measured through X-ray diffraction measurement (XRD) and a higher peak intensity (B) that is selected from a '100 plane' and a &#x201c;004 plane&#x201d; is at least 2.5 and less than 27. (3) The filler is in powder form and the average particle diameter D50 is at least 1 &#x3bc;m and at most 5 mm.

Carbon material filler for electromagnetic shield, electromagnetic shield material, and carbon-material-containing molded body for electromagnetic shield

Growing community of inventors

Aki-gun, Japan

Kenji Hiramoto