不同细度氨纶机械性能对比分析

Analysis of Mechanical Properties of Spandex with Different Fineness

选取了细度规格不同的5种氨纶丝试样,测试其沸水收缩率、线密度变异系数、拉伸性能及回弹性能,试验发现:氨纶丝的沸水收缩率随着细度的增加呈现下降趋势;氨纶丝线密度CV值随着氨纶丝细度的增大,明显下降;300%伸长时的强度随细度的变化不明显,断裂强度随氨纶丝细度增加呈现先增后减的现象,断裂伸长率随着细度增加呈现增加的趋势,拉伸300%时强度的CV值随着氨纶丝细度增加呈现下降的趋势;氨纶丝试样拉伸300%时弹性回复率随着细度增加呈现下降的趋势,即相对细度较细的氨纶丝弹性回复性能较好。

The boiling water shrinkage,CV value of linear density,tensile property and resilience of five kinds of spandex fibers with different fineness specifications were tested.It was found that the boiling water shrinkage of spandex fibers decreased with the in-crease of fineness.The CV value of linear density of spandex fibers decreased with the increase of spandex fiber fineness.The strength at 300%elongation did not change significantly with the change of fineness,the breaking strength increased at first and then decreased with the increase of spandex filament fineness,the breaking elongation increased with the increase of fineness,and the CV value of strength at 300%elongation decreased with the increase of spandex filament fineness.The elastic recovery rate of spandex fiber de-creased with the increase of fineness when it was stretched 300%.