| 摘要 |
Conductive composites with resin, produced by mixing a vapor grown carbon fiber having a fiber diameter of 2 to 500 nm with a matrix resin in a molten state while suppressing breakage of the fiber 20% or less, exhibit conductivity higher than that of a conventional conductive composites with resin through incorporation of vapor grown carbon fiber in an amount equivalent to a conventional amount, or exhibit conductivity equal to or higher than that of a conventional conductive composites with resin through incorporation of vapor grown carbon fiber in an amount smaller than a conventional amount. In the case where the melt-mixing of the fiber with resin is performed using a co-rotating twin-screw extruder, the vapor grown carbon fiber is preferably fed to the extruder by way of side feeding. In the case where the melt-mixing is performed using a pressure kneader, resin is sufficiently melted in the kneader in advance, and vapor grown carbon fiber is fed to the molten resin.
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