In a continuous process for making looped, continuous (mono-or multi-) filament yarn, Fig. 1 (not shown) a polymeric material e.g. a polyamide such as polyhexamethylene adipamide, poly-epsilon-caprolactum or poly-omega-aminoundecanoic acid, a polyester or polyacrylic, cellulose acetate or triacetate, a vinyl or vinylidene polymer, or polyurethane, is extruded into (one or more) filaments 20 which are directly forwarded by an air jet 22 (which also effects elongation and macromolecular orientation of the filaments) into an induction-motor driven, rotating, hollow e.g. inverted conical, body 24. The filaments fold or double upon themselves to form a web or assembly of randomly laid, serially connected, variable length, partially entangled loops deposited on the inner sloping or concave wall of the body and pressed thereagainst by centrifugal and frictional forces and the pressure of air passing from the body through perforations therein, Figs. 4-8 (not shown). The web is continuously withdrawn (through the hollow stem 25) as a yarn the twist effects in which (due to rotation of the body) are permanently retained when the yarn 26 is wound into a package 29. The final yarn, Figs. 11-16 (not shown) comprises a compact core, formed of progressively advancing loops aligned in a generally axial direction, and a peripheral region, formed of emerging, randomly arrayed loops extending outwardly therefrom.
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