非圆纤维形状因子的几何无关的半自动化测定

Semi-automated geometry-independent determination of the shape factor of non-circular fibers

异形纤维越来越多地用于纺织品的功能化,这些纤维由于具有非圆形横截面而与传统纤维区分开来。由于聚合物熔体在喷嘴出口处发生膨胀,异形纤维的生产相当困难,其结果是纤维横截面偏离了成型毛细管的横截面形状。可以用形状因子表征制得的纤维的横截面形状。定义了外伸因子(FO)和圆因子(FC)的形状因子准则。根据这些独立准则,可以推导出几何无关的形状因子(FITA)。半自动化程序的开发,使得可在较短时间内评估更大的样本,并减少了主观影响。

Shaped fibers are increasingly being used for the functionalization of textiles.These can be distinguished from conventional fibers by a non-circular cross-sections.The production of synthetic fibers is made considerably more difficult by the swelling of the polymer melt at the nozzle outlet.As a result,the fiber cross-section diverges from the shaping capillary cross-section.The so-called shape factor is used to characterize the resulting fiber cross-section.The shape factor criteria of overhang-factor(F O)and the circle-factor(F C)were defined.From these independence criteria a geometry independent shape factor(F ITA)can be derived.The development of semi-automated program enables the evaluation of larger sample sizes in a negligible amount of time and reduces the subjective influence.