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Principle of operation the new generation air-jet spinners were presented. Based on Murata Jet Spinner (MJS), MTS (Murata Twin Spinner) and MVS (Murata Vortex Spinner) offered by Japanese company MURATA and air-jet JW and J20 spinners offered by Swiss company RIETER. The principle of yam formation in double helix vortex was discussed, as well as pneumatic spinning using the principle of false twisting. In the classic two-jet pneumatic spinning air jets MJS air-jetthe principle of false twist was used. Element which impart the yarn twist in the pneumatic one-jet MVS spinning is a specially formed air jet having inside a hollow channel and additional air intakes to allow for a helical vortex. The most innovative air-jet pneumatic spinner is the MVS VORTEX III 870 working on the so-called „self-spinning" technology.
A comparative assessment of the manufacturing processes of new generation pneumatic yarns with classic ring yarns was made. The considerations included spinning speed, the number of machines involved in the spinning process, the surface occupied by these machines, the size of their employment, and the energy consumption. It has been found that air jet spinning machines enable produce cotton yarns, man-made yarns of cotton type and blends cotton yarns with chemical fibers with very high spinning speeds up to 400 m/min and even up to 500 m/min. In addition, the production of yarns on pneumatic air-jet spun yarns provides the opportunity to integrate manufacturing roving, spinning and winding of yarn together with its cleaning processes into one single operation, resulting in significant savings in occupied areas, employment and energy consumption.
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