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

本研究以铜镀纤维导电注塑制品为研究对象。导电注塑制品的体积电阻率测量结果表明，在注塑成型过程中，高剪切应力的材料由于被镀覆的纤维被树脂流动转向成型方向而表现出高的体积电阻率。此外，我们还阐明了体电阻率和电磁干扰密封的影响与流体诱导剪切应力有关。这些结果表明，在注塑成型过程中，可以通过剪应力来控制注塑制品的导电性。

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.