Monofilament extrusion is a process used to make continuous strands of polymeric material for a variety of consumer and industrial products. Both one and two polymer systems called co-extrusion or bicomponent extrusion are widely used. Synthetic monofilament fibers are produced by extruding a melted polymer through small spinneret holes. This process is well known and is broadly applied in industry. The preparation, melting, and extrusion of the polymer are similar to those used for film blowing, die casting, and various fiber spinning processes. However, for higher tex fibers (diameters of > 100 microns) the fiber processing is unique and is similar to slit film fiber processing (Hans A. Krassig, 1984). In the case of low tex monofilaments, the fiber processing steps are similar to the production of standard industrial multi-filament fibers.