The homogenized melt from the extruder is fed to a circular die or spinneret which is at90° to the axis of the extruder. The die is threaded on to the head which is connected tothe extruder through an adaptor or neck. The filter pack and breaker plate are mounted onthe head. The filter ensures that a contaminant free melt is fed to the die, which mayotherwise lead to breakage of filaments.
Monofilament dies usually have 180 to 200 holes which are even distributed on 2 or 3pitch circles (concentric to one another). The L/D ratio of the die is usually 8 to 10mm.These holes are precisely machined to get a smooth and uniform monofilament surface.A cone with a smooth surface is fixed onto the die to ensure smooth and uniform flow ofmelt to all the holes. Circular dies are preferred for uniform pressure drop throughout thedie.
The process essentially consists of the following steps
Monofilament fabric are used for various applications like