Problems of high-efficiency and short-flow spinning process for hemp fibers were discussed.The processes and efficiency of spinning systems for cotton,wool,hemp fiber and so on were compared.Based on the theoretical analysis and spinning results,the effects of fiber length on yarn unevenness and mechanical property were analyzed.Through spinning practice,yarn quality of hemp fibers with different length after the spinning were compared.The spinning of hemp cut-off fibers with a cotton-type spinning system was proposed.It is considered that excessively long fibers would lead to longer processes and lower productivity.When the fiber was reached a certain length,the effect of increasing fiber length on yarn quality was no longer significant.Appropriately short fibers was helpful to simplifying the spinning process and the yarn quality.When the hemp fiber length was controlled in the cotton fiber length range,it can be spun in the cotton-type spinning equipment completely using the cotton-type spinning equipment to transform and enhance the equipment and technology level of hemp-type spinning.
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