双组分复合长丝卷曲稳定度的测试方法探讨

Discussion on the Test Method of Crimp Stability of Bi-Component Composite Filament

对双组分纤维来说,其螺旋卷曲结构是优异的弹性性能的主要来源,卷曲稳定度可以表征弹性回复的大小。卷曲稳定度反应的是长丝在承受重负荷之后仍可保留的卷曲收缩量,由于双组分具有不同的拉伸和收缩特性,在机械外力和热处理的作用下形成类似羊毛的三维卷曲态,从而赋予纤维良好的卷曲弹性,所以在热水或者热空气条件下,卷曲显现温度、卷曲显现时间、负荷不同,卷曲稳定度也是不同的,探讨了上述因素对复合长丝卷曲稳定度的变化规律,得到最佳卷曲稳定度的工艺条件。

For bi-component composite filament, the spiral crimp structure is the main source of excellent elastic properties. Crimp stability can be used to characterize the magnitude of elastic recovery. Crimp stability reflects the amount of crimp shrinkage retained by the filaments under heavy load, due to the different tensile and shrinkage properties of the two components, under the action of mechanical external force and heat treatment, a three-dimensional crimp state similar to that of wool is formed, which endowing the fiber good crimp elasticity, so under the condition of hot water or hot air, the crimp temperature, the crimp time and the load are different, and the crimp stability is also different. The changing law of the above factors on the crimp stability of composite filaments is discussed, and the process conditions of the best crimp stability are obtained.