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: The evolution of spinning technology was focused on improving productivity with good quality of yarns. Moredetail spinning technology according to mixing of various kinds of fibre materials on the air vortex spinning system isrequired for obtaining good quality yarns. This paper investigated the physical properties of air vortex yarns comparedwith ring and compact yarns using PTT/tencel/cotton fibres. It was observed that unevenness of air vortex yarns washigher than those of ring and compact yarns, which resulted in low tenacity and breaking strain of air vortex yarns. Initialmodulus of air vortex yarns was higher than those of ring and compact yarns. Yarn imperfections of air vortex yarns suchas thin, thick and nep were much more than those of ring and compact yarns. These poor yarn qualities of air vortex yarnwere attributed to the fasciated yarn structure with parallel fibres in the core part of the air vortex yarn. However, yarnhairiness of air vortex yarns was less and shorter than those of ring and compact yarns. Thermal shrinkage of air vortexyarns were higher than that of ring yarns, which was caused by sensible thermal shrinkage of PTT fibres on the bulkyyarn surface and core part of air vortex yarns. Key words : air vortex spinning(  ), compact spinning( ), PTT(), imperfection(),force-elongation( ), thermal shrinkage( )

han'gug uilyu san'eob haghoeji/han-guk uiryu saneop hakoeji

Study on the Physical Property of PTT/Tencel/Cotton MVS Blended Yarn for High Emotional Garment (I) - Physical property of blended yarn according to yarn structure -