利用光衍射测量长丝纱的变形结构

Light diffraction used as optical instrument to measure texturing of filament yarns

无变形的长丝纱倾向于以一种平行且均匀的方式排列在一起。相比于表面不太均匀且包含毛羽的短纤维纱线,无变形的长丝纱表面很光滑。在很多应用中,人们期望可在保留长丝纱连续性的同时获得短纤纱的某些特性。通过变形丝工艺,可以使长丝纱获得特定的性能,如高膨松性、高弹性和孔隙度。在实验室中,可以离线测量变形纱的性能,但还没有实现对运行过程中的纱线进行性能的实时在线光学检测。离线测量方法成本高,且只能获得随机纱线样本质量的统计信息。除介绍了最先进的变形纱参数的测量外,还提出了一种直接光学测量变形纱的潜在方法。

Non-textured filament yarns tend to exist side by side in a parallel and even way.The surface is smooth compared to the less uniform and hairy surface of staple fiber yarns.For many applications staple fiber specific properties are desirable with retention of the continuity of a filament at the same time.Through texturing the filament yarns obtain customizable properties such as high bulk,high elasticity and porosity.The properties of textured filament yarns are currently measured offline in the laboratory.Online optical methods for the characterization of filament yarns on the running yarn do not exist.Offline measurement methods are costly and generate only statistical information on the quality of the yarn by random sampling.Besides the state-of-the-art of the measurement of textured yarn parameters,apotential method for the direct optical measurement of textured filament yarn is presented here.