Design Of Axial Non-uniform Bicomponent Yarn,and Study Of Its Moisture-absorption And Quick-drying Properties

Comfort has become the first requirement of consumers for clothing,moisture-absorption and quick-drying properties is an important part of clothing comfort.Generally,the property of fiber is simple and difficult to have both good moisture-absorption and quick-drying properties,thus limiting the performance of fabric.At present,there are several typical methods to give the fabric good moisture-absorption and quick-drying properties,one way is to modify the fabric,the other way is to adopt uniform mixing spin,and the third way is to adopt special finishing on the fabric.The practice of developing moisture-absorption and quick-drying fabrics by fiber modification and special finishing has gradually approached maturity,but there are few researches of yarn,especially the approaches to enhance the moisture-absorption and quick-drying properties from the yarn structure.So this research takes yarn structure as an entry point,and makes corresponding research on the following contents:Firstly,The axial non-uniform bicomponent yarn was designed and spun.In this paper,according to the characteristics of hemp yarn structure and based on the technology of segment color spinning,the structure of axial non-uniform bicomponent yarn was designed.On the basis of the existing literature,the equipment was modified and several non-uniform yarns were spun.It is verified that the design of non-uniform yarn and the parameters of spinning process are reasonable by testing the basic properties and observing the microstructure.Secondly,the fiber distribution parameters of yarn which meet the requirements of weaving are discussed.According to the non-uniform yarn structure and moisture-absorption and quick-drying mechanism,the length of segment,gradient change and content of each fiber components were determined as main factors which affect the moisture-absorption and quick-drying properties of the non-uniform yarn.Cotton and Coolsmart fibers were selected and the orthogonal experiments were designed,the relevant specifications of non-uniform yarn were spun.Through the tests of hairiness,breaking strength and micro-structure observation,the results showed that,in order to obtain the non-uniform yarn with clear gradient effect,obvious segmentation effect and good yarn performance,the length of segment could not be less than 3cm,and the gradient change could not be larger than 1/2.Finally,the effect of yarn structure and fiber distribution parameters on the moisture-absorption and quick-drying properties of the fabric was discussed.Several fabrics were prepared by sizing,weaving and finishing,and then tested the permeability,water absorption,water conductivity and moisture dissipation of fabric.The result showed that the permeability of non-uniform yarn is slightly higher than that of uniform yarn.The water absorption is equivalent.The yarn structure has a great influence on the water conductivity of the fabric.Compared with the uniform yarn fabrics,the drip diffusion area of the non-uniform yarn fabric increased to different degrees at the same content of fiber components,which was related to the content of each fiber components.Among the distribution parameters of fibers,the gradient change has a significant influence on the moisture dissipation of the non-uniform yarn fabric,the larger the gradient change,the smaller the moisture dissipation.The content of each fiber in non-uniform yarn has a significant effect on the core suction height,drip diffusion area and drying rate.In this paper,the axial non-uniform bicomponent yarn was designed and spun.The effect of yarn structure and fiber distribution parameters on the moisture-absorption and quick-drying properties of the fabric was studied through a series of experiments and analysis,which laid a foundation for the development of the moisture-absorption and quick-drying fabric.