Uniform Color Developing And Preparation Technology Of Color Micor/nano Fiber Blended Yarn

The traditional dyeing process will produce a large amount of printing and dyeing wastewater,damage the environment,and the dyeing operation is relatively complex.Therefore,colour spinning enterprises pay great attention to the preparation of colour yarn in new environmental protection processes.With the continuous maturity of electrostatic spinning technology,some enterprises and scholars combine it with traditional cotton spinning technology to prepare blended yarn.By adding dye coloured micro/nanofiber spinning dope preparation,again with the cotton blends can be blended yarn,the preparation method of the coloured yarn process,reduce the production cost,reduce or even eliminate the printing and dyeing wastewater,but were uneven yarn colour,still cannot meet the needs of uniform colour.Therefore,starting from the process parameters such as polymer concentration,the distance between the nozzle and the receiving plate,and the distance between the nozzle and the nozzle,this paper analyzes the causes of the uneven yarn colour.COMSOL simulation software was used to simulate the electric field at the nozzle to analyze the causes of colour unevenness and explore the more appropriate spinning parameters.The mixed yarns with uniform colours were prepared by the ring and rotary spinning.The physical and mechanical properties of the two yarns were compared and analyzed.The spinning process with a better colour rendering effect was obtained.The specific research contents are as follows:(1)Study on the factors of colour unevenness of colour micro/nanofiber blended yarn.Ten different samples were prepared by changing the polymer concentration,the distance between the nozzle and the receiving plate,and the distance between the nozzle and the nozzle.The fluorescence tracer,apparent colour depth,and the proportion of coloured fibres were analyzed for these samples.(2)Study on the technology of uniform colour development of colour micro/nanofiber blended yarn.COMSOL Multiphysics software was used to simulate the field intensity at different nozzle spacing,explore the reasons for the influence of nozzle spacing on the distribution of coloured fibre,and determine the optimal nozzle spacing for the uniform colour of blended cotton sliver.The sliver was then tested for fluorescence tracer,apparent colour depth,and the percentage of coloured fibres.(3)Study on the preparation of colour micro/nanofiber blended yarn.Two blended yarns with uniform colour were prepared by ring spinning and rotary cup spinning,and their apparent colour depth,colourfastness and yarn strength were tested.The results show that:(1)The change of polymer content and the distance between the nozzle and the receiving plate affects the colour depth but has no noticeable impact on the uniformity of the distribution of coloured fibre.When the distance between the nozzle and the receiving plate increases,the colour of the coloured sliver gradually becomes lighter;In addition,with the increase of the distance between the nozzle and the nozzle,the phenomenon of colour unevenness of the sliver is continuously reduced,that is,the uniformity of the distribution of coloured fibre is improved.(2)After changing the parameters,the distribution of coloured fibres in the sliver is more uniform.The phenomenon of fibre tangles disappears,and the proportion of coloured fibres tends to be stable.(3)The apparent colour depth of ring-spun yarns is lighter than that of rotary spun yarns,but the yarn strength is higher than that of rotary spun yarns.At the same time,it was found that the colour fastness of the yarn made of dispersed red and blue was higher than that of the yarn made of dispersed red dye.Still,the yarn's colour fastness made of dispersed red dye was higher than that of the yarn made of dispersed red dye.Still,the yarn's colour fastness made of dispersed red dye was higher than that of the yarn made of dispersed red dye.Still,the colour fastness of the yarn made of dispersed red dye was higher than that of the yarn made of dispersed red dye,but the colour fastness of the yarn made of dispersed red dye was higher than that of the yarn made of dispersed red dye.