Skin-core structure of filament textured yarn and its parameter

In the textured yarn family,both the air-jet textured yarns and the differential shrinkage textured yarns have the skin-core structure,so it is necessary to study its forming principles and its model.By means of experiments and analysis,it is believed that though these two sorts of textured yarns are all different in their skin-core structure forming,the model of this structure can be defined as closely netted and kinked core plus loose loop skin structure.It is proven by EIB experiments that this model is characterized by several parameters such as average diameter of the yarn,average diameter of the yarn core and the height of loop.So there must be some close relationship between the skin-core structure of textured yarns and some of its properties such as the bulkiness,evenness and hairiness.