In order to solve the problems of high nep and many hairiness of lyocell fiber spinning yarn,the spinning of lyocell 14.8 tex knitting yarn is taken as an example,the process princi-ples of each spinning process and the optimal configuration of main parameters are described in detail according to the properties of raw materials and the spinning process.The carding acces-sories are selected through the blowing-carding unit,the heavy weight per unit is used in the carding process and the flexible processes are applied to reduce the fiber damage,ensure car-ding,strengthen transfer,and reduce cotton neps and short fiber.In the drawing process,the drafting distribution is optimized,the straightness and parallelism is increased,the total draft-ing multiple is reduced,the evenness level is stabilized.In the roving yarn process,the roller gauge is enlarged,the drafting efficiency is improved,the drafting multiple of back zone is re-duced,and the evenness level is raised.In the spinning process,the main drafting is concentrat-ed,the roller gauge is enlarged,the drafting force fluctuation is reduced,the ring and traveler are optimized,and the yarn hairiness and the broken ends are reduced.The above measures are taken and the temperature and humidity are reasonably set.By comparing the yarn quality in-dex before and after process optimization,it shows that after a series of process optimization measures,the workshop work is stable,the number of hairiness,broken ends and neps of lyo-cell 14.8 tex yarn are reduced,and the yarn quality is stable.
lyocell fiber14.8 tex knitting yarncard clothingnepshairinessheavy weight per unitdraftinggaugebroken ends
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