棉纤维集合体压缩后性能分析

Performance analysis of cotton fiber assembly after compression

通过改变压缩负荷和压缩时间对一定质量的普通细绒棉和有机细绒棉的纤维集合体进行了压缩，并对压缩前后棉纤维的基本性能进行了测试。结果表明：在一般的压缩条件下纤维的纵向形貌没有明显的变化，在压缩时间为200h、压缩负荷为30kg的试验条件下普通细绒棉纵向出现了劈裂现象；随着压缩时间的延长和压缩负荷的加大，棉纤维长度和断裂伸长率呈增长趋势，线密度、短纤维指数和断裂强度呈降低趋势；纤维长度和线密度的变化受压缩时间的影响更大．断裂强度和断裂伸长率的变化受压缩负荷的影响更大。

The compression performance is one of the important physical and mechanical properties of cotton fibers. The compression density or compression time of the fiber assembly may affect the mechanical properties and morphological structure of the fiber. A certain mass of fiber assembly of ordinary cotton and organic cotton are compressed through changing the compression load and time, and properties before and after compression are tested. These experiments show that the morphology along fiber length does not change obviously under general compression, but when the compression time is 200 hours and the compression load is 30 kilograms, the ordinary cotton split off. With the growth of compression time and load, the length and elongation of cotton increase, and the line density, short fiber index and breaking strength decrease. The compression time influences more by the change of the length and line density, and the compression load influences more by the change of breaking strength and elongation.