自捻纱的拉伸力学性能

Tensile properties of self-twist yarns

针对自捻纱断裂强力和断裂伸长率较低的问题,通过对同种原料自捻纺纱线和环锭纺纱线的拉伸力学性能进行对比,讨论了适合自捻纺纱的纤维和必须经过复合才能进行自捻纺纱的纤维以及对纤维配比的要求。与环锭纺纱线相比,羊毛、腈纶、涤纶自捻纱的断裂强力依次降低81.25%、49.33%、31.39%。涤纶、腈纶等纤维能直接采用自捻纺加工方式,而羊毛和苎麻不能直接采用自捻纺纱,必须和其他原料复合自捻。分别对毛/涤纶、麻/涤纶、腈纶/涤纶双组分复合自捻纱进行拉伸力学性能分析,结果表明,要使纱线拉伸性能符合要求,2种原料的组分中涤纶纤维含量需满足:毛/涤纶纱中占60%以上,麻/涤纶纱中占71%以上,但腈纶/涤纶纱的纤维配比不受限制。

In view of the problem of lower breaking strength and elongation of self-twist yarns,the fibers and those after being combined with other fibers suitable for self-twist spinning and fiber ratio were discussed,by comparing the breaking properties of self-twist yarns with that of ring spun yarns made by the same fibers. In comparison with the ring spun yarns,breaking strength of wool,polyester,acrylic self-twist yarn decreased by 81. 25%,49. 33%,31. 39%,respectively. Polyester and acrylic fibers can be used directly for the self-twist spinning,but wool and ramie can＇ t be used directly and must be compositely twisted with other fibers. Results of mechanical properties of wool / polyester,ramie / polyester,acrylic /polyester composite self-twist yarn show that polyester fiber percentage should reach 60% or above in wool /polyester composite self-twist yarn to meet the processing requirement of afterward procedure,and for ramie / polyester it should reach 71% or more,with no limit for acrylic / polyester.