| 摘要 |
PURPOSE:To improve dispersibility by mixing conductive metallic particles, a hot meltable resin and a charge control agent, then executing hot melt kneading and grinding respectively >=1 times to form powder, and subjecting this powder again to hot melt kneading, grinding and classifying, thereby sizing the powder to prescribed particle sizes. CONSTITUTION:The conductive metallic particles 1, the hot meltable resin 2 and the charge control agent 3 are mixed and thereafter, the mixture is subjected to the hot melt kneading and grinding respectively >=1 times to obtain the 1st powder. A 2nd stage to obtain the 2nd powder by subjecting the 1st powder again to the hot melt kneading, then to the grinding and kneading is provided in succession to the 1st stage. The content of the conductive metallic particles 1 and the charge control agent 3 in the chargeable powder is uniformed by >=2 times of the kneading including the pulverizing. The chargeable powder for circuit formation of wiring boards which can print uniform wiring patterns by uniformly electrofying the respective powders at the time of electrophotographic printing and has good printability is produced in this way. |
