Melt spinning monofilaments production

Early in the manufacture of PP, a concept was developed for dry spinning directly from the solution obtained in the polymerization operation. Had it been feasible, it would have been the realization of a chemical engineer s dream the gaseous olefin fed into one end of the equipment, and the packaged fiber, ready for shipment to a textile mill, coming out the other end. But it did not turn out that way, and today melt spinning is the accepted technique for the production of staple fibers, monofilament, and multifilament yams. To this usual method have been added the fibrillation and the slit film procedures for producing yams. 

PEN mnltifilament fibers are commercially available from several polyester fiber prodncers. These include Teijin in Japan, Honeywell (formally AlliedSignal) in the United States and Enrope, Kosa in Europe, and Hyosimg in Korea. PEN fibers are produced in a melt spinning/post-drawing process similar to that used in PET fiber manufacture. All production to date is in the form of continuous multifilament yarn, although staple and monofilament fabrication have also been reported. 

The manufacture of all man-made fibers involves at least three distinct process steps. The first consists of the production of polymers or polymer derivatives suitable for spinning into fibers. In the second step, or spinning, a polymer melt or solution is extruded under pressure through the appropriate spinneret s orifice(s) to form the fiber or fibers. If only a single fiber is produced from a spinneret, it is referred to as monofilament. Multifilament spinnerets produce yarns. The third step is drawing,... 

PBS is a typical thermoplastic and can be processed via various methods, such as extrusion, injection molding, film blowing, fiber spinning, and thermoforming. It has been reported that PBS can be processed into melt-blown, multifilament, monofilament, nonwoven, flat and split yarn, injection-molded products, film, paper laminate, sheet, and tape for applications in the textile and plastic industries. 

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