Establishment of orientation control techniques of cupper plating fiber for electrical property improvement in injection molding

在本研究中，导电注塑制品，使用镀铜纤维的重点。作为导电性注射成型品的体积电阻率的测定结果，在注射成型时剪切应力高的材料中，由于树脂流动，镀覆纤维转向成型方向，因此体积电阻率高。此外，我们还阐明了体积电阻率和电磁干扰密封效果与流体诱导剪切应力有关。这些结果表明，注塑制品的导电性可以由注塑过程中的剪切应力控制。

In this study, the electrically conductivity injection molded article that used the cupper-plated fiber was focused. As a measurement result of volume resistivity in the electrically conductive injection molded article, the material which was high shear stress during injection molding showed high volume resistivity because of the plated fiber turns to the molding direction by the resin flow. In addition, we clarified that the volume resistivity and effect of electro-magnetic interference sealed were related to the flow induced shear stress. These results indicate that the electrical conductivity of injection molded article can be controlled from shear stress during injection molding.