Abstract: The invention provides a process and apparatus for forming a yarn of at least two separate continuous filaments and a plurality of fibers. At least one of the filaments is of a partially oriented thermoplastic material such that when a twisting force is applied, a retained twist is obtained due to inter-molecular slippage in the partially oriented filament.

Abstract: The present invention provides a process and apparatus for manufacturing yarn products comprised of an inner core of fibers and an outer layer of fibers. In the process, first fibers have a pre-twist imparted thereto to form a strand which becomes the inner core of the yarn and the pre-twist is retained by passing the yarn between two pinch points. While between the two pinch points, second fibers are juxtaposed to the strand and any untwisting tendency by the inner strand will tend to twist the outer layer of fibers. Optionally, the yarn may undergo a further twisting operation while between the two pinch points after the second fibers have been deposited.

Abstract: An apparatus and process for forming yarn products. The apparatus has first yarn forming material supply means, collecting means for receiving the first yarn forming material, second means for supplying a second yarn forming material and for placing it in juxtaposition with the first yarn forming material, and means for transforming the composite material into a consolidated product.