HERSTELLUNGSVERFAHREN FUER STABFOERMIGE FASERBUENDEL-ELEMENTE

摘要

Heat treating a fibrous bundle containing at least 20% by weight of adhesive fibers by introducing the fibrous bundle into a heating zone through an elongated transport zone that is surrounded by said heating zone, imparting heat to the exterior portion of said fibrous bundle by directing heat against the exterior of said transport zone and imparting heat throughout the interior of said fibrous bundle by directing heated gas outwardly through the interior of said transport zone in a direction opposite to the inward movement of said fibrous bundle through said transport zone.