Effect Of Yarn Structures On The Moisture Transport Property Of Yarns And Fabrics

In recent years,with the improvement of living standards,the majority of consumers prefer to pursue the cloth with good comfortability other than good durability.After the outbreak of the epidemic,the number of persons who are paying attention to fitness is increasing for improving their health.Meanwhile,the demand for sports textiles is also increasing.Whether it is sports textiles or leisure textiles,the ability to transfer sweat from the skin surface to surroundings in time is essential to maintain the comfort of textiles.The price of staple yarn is cheaper than that of filament,and staple clothing is more acceptable because of its softer touch feeling.At present,the mainstream staple yarns in the market have three categories,that is,ring spinning yarns,rotor spinning yarns and vortex spinning yarns.New spinning technologies are developing rapidly at home and abroad,providing options for different textile demands;however,the influence of the structure of the new yarns on the moisture conductivity of the woven fabrics has not been systematically and comprehensively studied.To reduce the influence of the raw material on the moisture conductivity of the fabric,the yarn structure based on the arrangement and interaction of the fibers was studied by using polyester as the raw material and the weak hygroscopic property of the fabric(convention moisture regain=0.4%).By comparing the ability to conduct liquid water of the corresponding yarns of ring spinning yarn,rotor spinning yarn,and air vortex spinning yarn with those of the fabrics spun based on the three yarns,the moisture conduction modes of different fiber winding modes,binding forms,and arrangement densities were studied in depth.This study can provide guidance and reference for the development of thermal and wet comfort textiles.The main research contents and results are as follows:(1)Study on moisture conductivity of yarn with different yarn structures.The ring spinning yarn,rotor spinning yarn,and air vortex spinning yarn with a yarn density of 28 tex were spun by using 1.33dtex×38mm polyester staple fibers as raw materials.The internal structure and moisture conductivity of the three yarns were compared and analyzed by using image analysis technology,wicking experiment,and in-situ analysis method.The results show that the wicking height of ring spinning yarn is the highest,followed by air vortex spinning yarn and rotor spinning yarn.The uniform spiral shape of fiber in ring-spun yarn forms a good liquid transport structure.The fibers in air vortex spinning yarn have a core-wrapped structure.The corewrapped fibers are closely wrapped by the outer wrapping fibers,and the liquid propagates upward along the core-wrapped fibers.The structure of rotor spinning yarn is similar to that of air vortex spinning yarn,but the outer wrapping fibers are messy,which hinders the transmission of liquid.(2)Study on moisture conductivity of fabric with different yarn structures.This study is based on the study of yarn moisture conductivity.Three kinds of yarns are woven into 1+1 rib fabric,and other parameters are guaranteed to be the same except yarn structure.The influence of yarn structure on fabric moisture conductivity was compared and analyzed by wicking test and droplet diffusion area test.The results of the wicking test show that the wicking height of air vortex spinning textile is the highest,followed by ring spinning textile,and the rotor textile is the worst,which is inconsistent with the test results of yarn moisture conductivity.To further support the fabric test results,comparative analysis of the fabric of the droplets spread area of the experiment,the experimental results consistent with experimental results of fabric wicking test results,suggesting the yarn and fabric core inconsistent results absorption may be the cause of hairiness,and to confirm the speculation,the sheet simulated fabric was taken as the experimental object,to eliminate irrelevant factors,wicking experiments again.The results show that hairiness is the key factor that causes the difference in wicking test data between yarn and fabric.When the yarns in the fabric are loosely arranged,the yarn structure is the main factor affecting the moisture conductivity of the fabric.When higher fabric tightness,squeezed into a tight arrangement between yarn,hairiness is more significant than the influence of the yarn structure.Hairiness blocks the wicking passage between yarns,has affected the yarn surface between the fiber and fiber wicking effect,and can also lead to poor wettability of the fabric,resulting in poor moisture conductivity of the fabric as a whole.