烟用二醋酸纤维素丝束飞花的研究

Study on the Fly of Cellulose Acetate Cigarette Tow

本文介绍了近年来南纤公司在研究丝束飞花难题方面所做的工作及取得的成绩。丝束飞花日均值从原来用户难以接受的19．3mg／30min下降为今用户满意的10．0mg／30min偏下。借助显微镜的观察，首先提出了飞花具有不同的结构种类的看法，并对此进行分类，初步分析了不同飞花结构的产生机理。对错片粘度、浆液水分、浆液状态、丝束油剂等主要工艺控制指标与丝束飞花的关系，进行了较深入的探讨。最后，通过建立力学模型，分析了卷曲压力对丝束飞花的影响，提出适当降低丝束超喂率，注小卷曲机反庆力，有助于减少丝束飞花的形成。

Relative work on studying tow fly and a great success in controlling it made andachieved by NCFC in recent years are introduced briefly in paper. The fly is now undergood control and has droped from a daily AVG. value of 19. 3mg/30min which is uhacceptable to customer to daily AVG. value of 10.0 mg/30min which is much welcomedby customer since the beginning of 1996. With the help of microscope, a new point ofview about existence of many different fly shapes is first raised and their formationmechanism are also analysed preliminarily. In this paper, the relationship between somemajor processing targets such as flake viscosity, dope moisture, dope condition, towfinish etc. And the tow fly is discussed deeply. Finally, through a mechanical model,the relations between crimper pressures and tow fly are studied, and it is forward thatlower overspeed and lower crimper pressure are favorable to decreasing the formation oftow fly.