Abstract: It is an object to provide a process and an apparatus which allow stable production of ultrashort-cut fibers having fiber lengths of no greater than 0.1 mm while minimizing miscutting, the object being achieved by a process and apparatus whereby numerous individual filament groups are bound to form a fiber bundle, an embedding material which is solidified by cooling and gasified or liquefied by heating is gasified or liquefied, the fiber bundle is embedded with the gasified or liquefied embedding material, and the edge of the embedded fiber bundle is thinly shaved at a temperature at which the embedding material does not gasify or liquefy, to obtain ultrashort-cut fibers having cut fiber lengths of no greater than 1.0 mm.

Abstract: A filament-reinforced resinous structural rod having a rugged periphery thereof comprises a reinforcing fibrous member impregnated with a polymeric resinous material and comprising a core element composed of a plurality of filament bundles bundled together, a binding element comprising a filament bundle spirally wound around the core element, a plurality of filament bundles arranged in parallel to each other on and along the core element, and a filament bundle spirally wound around the assembly of the core element bound with the wound filament bundle and the plurality of filament bundles in parallel to the filament bundle wound around the core element.