抄録
Fiber orientation of extruded short-fiber reinforced plastics is experimentally investigated. Glass fiber reinforced polyproplene is extruded at various extrusion ratio and temperatures and then cooled rapidly under constraint of strain recovery. A high degree of fiber orientation is achieved by ram extrusion at high extrusion ratio near the melting temperature. The orientation state of extruded materials is almost uniform through the section. Fiber orientation is affected by extrusion processing conditions, such as extrusion ratio and extrusion temperature. The mean fiber length has a linear decrease with increasing extrusion ratio and a linear increase with increasing extrusion temperature.
