A comparative study of the wrap-spun, flyer-spun covered and conventional all-jute yarns

177-181Jute yarns of 276 tex nominal count have been spun using polypropylene filaments as wrapping element on apron draft jute spinning frame with 240 tpm and the properties of these yarns compared with those of the conventional all-jute yarns of equivalent nominal count spun on the same apron draft jute spinning frame using the optimum twist of 160 tpm and higher twist of 240 tpm. The wrap-spun jute/polypropylene yarns of equivalent nominal tex have also been produced using hollow spindle spinning frame with 250, 300 and 350wraps/m and their properties compared with those of the all-jute and covered yarns. It is observed that the tenacity of all the covered and wrap-spun yams is lower than that of the all-jute yarn. However, the breaking extension and work of rupture of the covered and wrap-spun yarns are much higher than those of all-jute yarns. Yarn mass irregularity is found to be higher in all-jute yarn compared to other yarns. Hairiness of wrap-spun yarn is much lower than that of the all-jute and covered yarns