Novel Method of Observation of Flow Induced Fiber Orientation in Injection Molding of FRTP

Abstract

The objective of this research is the observation of fiber orientation for the whole of injection moldings, not a local observation. In this method, a remarkable point is using a degradation of the UV light level exposed. PPS/GF composite was exposed to accelerator weathering test about 400 hours. In this treatment, the surface was degraded, and fibers appeared on the surface. The phenomenon was observed on the whole surface of it. The fiber orientation of surface layer were observed using a optical-microscope. In this process, as a degradation of the surface of UV exposed was using, it is not under the effect of any plastics or any shapes. As there are no need of cutting or polishing for sample preparation, we can observe the fiber orientation of a curved surface, edge of a corner.