Method for producing electrically conductive resin composition

摘要: PROBLEM TO BE SOLVED: To provide a method for efficiently producing an electrically conductive resin composition containing carbon black by using single continuously kneading extruder. SOLUTION: This the is characterized preparing masterbatch comprising thermoplastic resin, (a) in amount of 40-90 pts. mass and 10-60 based on 100 total upstream part barrel extruder then introducing (b) 5-500 mass% from downstream side same when resins satisfying following formula (I) extrusion: [melt flow rate(MFR) (a)]/[melt (b)] = 2-20 (I).