Study On The Process And Properties Of Moisture Absorption And Sweat Releasing Profiled Polyester DTY

This dissertation mainly studies the process and properties of moisture absorption and sweat releasing profiled polyester pre-oriented yarn (POY) and draw textured yarn (DTY) made by high-speed spinning and draw texturing. By properly setting the process parameter and measuring the degree of profile, the orientation factor, yarn irregularity, the properties of moisture absorption and sweat releasing, the breaking strength and elongation, we discuss the effect of process parameter on the morphology and properties of POY and DTY. The results show that the degree of profile increases with the decrease of spinning temperature and the increase of the velocity of cross air blow. The orientation factor and yarn irregularity have a strong relationship with the spinning temperature, the composing of spinneret pack, the structure of spinneret, the velocity of cross air blow, the location of oiling and bundling, the spinning speed etc. It is also indicated that the process parameter of draw texturing has a large effect on the moisture absorption and sweat releasing properties of profiled polyester DTY. The key technical and innovation point of this dissertation is that we make a large improvement on the cross-shaped spinneret that is widely used in the profiled polyester fiber manufacture. By redesigning the ratio of length and diameter of the spinneret orifice, optimizing the way of the orifice arranging on the spinneret and the composing of spinneret pack, we produce the profiled polyester fiber with a high degree of profile and good properties of moisture absorption and sweat releasing. Through the research, we basically find out a mature process way to produce the moisture absorption and sweat releasing profiled polyester POY and DTY in order to supply some theory guidance for the industrialization of manufacturing the moisture absorption and sweat releasing profiled polyester DTY.