| 摘要 |
A spinneret for use in producing composite filaments, comprises: nozzles (27) for feeding at least an island constituent melt; a combining chamber (25) having a horizontal bottom surface, into which chamber a sea constituent melt is introduced, the combining chamber having discharging holes (28) for the sea melt in combination with the respective nozzles (27), each combination being connected to an outlet (30) for extruding a primary composite melt stream of a "core in sheath" type or a secondary composite melt stream of an "island in a sea" type. The sea melt is fed into the combining chamber (25) through vertical passages (45), the outlets of which are located substantially uniformly over the entire bottom surface of the combining chamber (25). The extruding outlets (30) are grouped into respective groups, each group having the same number of extruding outlets and the extruding outlets (30) in each group are located equiangularly along a circle III. Each circle III has the same diameter, the respective circles having centres at which the outlets of the vertical passages (45) are located and being substantially equally spaced apart from the neighbouring circles III. |
