| The production process of Sorona filament is clean,and the garment fabric developed by Sorona is safe and environmentally friendly,soft and elastic,which can meet people’s needs.At present,untwisted silk is mainly used to develop elastic knitted fabrics in the market,but the research on the properties of filament yarn after twisting is less.This paper mainly studies the performance changes of Sorona filament after double twisting,especially the elastic recovery,so as to provide ideas for the development of a substitute for spandex knitted yoga wear fabric.In this paper,based on the research of Sorona without twisting filament,in the twisting machine two,three,wire and twist,come to change the structure and properties of the filament,and carries on the research analysis,optimizing the stretchability of twisting filament and elastic resilience,and developed an Sorona filament elastic fabric,enrich the knitting products,specific research work is as follows:Firstly,this paper analyzes the structure and curl form of Sorona filament and explores the twisting process of filament.The results show that the high crimp has great extensibility and elastic recovery,making it a substitute or supplement of spandex in many cases.In the performance comparison of four different specifications of filaments after twisting,the tensile properties and elastic recovery properties of the twisted filaments are slightly improved compared with the untwisted filaments,which confirms that the elastic properties of Sorona filaments are improved after twisting.Secondly,the influence of the combined twisting process on the properties of the filament is further explored,and the changes of the properties of the combined and combined twisting are compared and analyzed.The results show that the tensile properties and elastic recovery properties of the double twist yarn are superior to those of the combined yarn,and the comparison of the properties of the untwisted yarn,the combined yarn,the combined yarn and the combined yarn proves that the double twist process is the optimal one for improving the filament properties.Then,single factor test and optimization were carried out to study the effect of twist coefficient and pretension on the tensile properties and elastic recovery.Through single factor test analysis,it is found that twist coefficient and pretension are the main factors that affect the tensile properties and elastic recovery of twisted yarn.Take 30D/50 D double twist as an example,in exploring the optimal process,the elastic recovery rate are optimized by the quadratic general rotary experiment process parameters,establish the regression equation,to seek the optimal solution,The best technology of 30D/50 D double twine twine was obtained.The results show that the elastic recovery rate is the best when the twist coefficient is 405 and the pretension is 5.Then,the optimized and twisted filaments and the filaments under other technological parameters were trial-manufactured on a small circular machine,and the elastic recovery rate and bursting strength were analyzed in detail.The results show that the elastic recovery rate and bursting strength of the optimized 30D/50 D two-strand parallel twisting yarn are higher than those of the other parameters,which proves that the optimized process can improve the properties of filament and fabric.Finally,heat treatment was carried out on the combined silk fabric and the optimized twisted silk fabric,and the elastic recovery performance was tested.The results show that after heat treatment,the elastic recovery rate of the twirled silk is higher than that of the combined silk,which is consistent with the properties of the filament before and after twirling.At the same time,the elastic recovery rate of the fabric after heat treatment will be further improved,indicating that heat treatment will improve the elasticity of the fabric,and the elastic recovery rate is better at lower temperature.The elastic recovery rate of the fabric after heat treatment is higher than that before treatment,and meets the elastic requirements of yoga clothes.The research in this paper has a guiding effect on the development of elastic fabrics from Sorona bicomponent filaments. |
PDF Full Text Request