二醋酸纤维素纤维纺丝溶液的挤出胀大行为

纺织学报 ›› 2015, Vol. 36 ›› Issue (04): 7-10.

二醋酸纤维素纤维纺丝溶液的挤出胀大行为

收稿日期:2014-02-19 修回日期:2014-11-13 出版日期:2015-04-15 发布日期:2015-04-20
通讯作者: 于勤 E-mail:yuqin19791123@163.com

Die swell behavior of cellulose diacetate spinning dope

Received:2014-02-19 Revised:2014-11-13 Online:2015-04-15 Published:2015-04-20
Contact: YU QIN E-mail:yuqin19791123@163.com

摘要/Abstract

摘要：

为研究二醋酸纤维素纤维（CDA）纺丝溶液在正三角形喷丝孔出口处的挤出胀大行为，通过激光外径测量仪，对不同剪切速率条件下，不同质量分数、温度、流量的纺丝液和不同长径比的喷丝孔的挤出胀大比进行了系统研究。结果表明：当剪切速率一定时，随着CDA纺丝液质量分数和纺丝液流量的增加，挤出胀大比也逐渐增加；提高纺丝液温度和增加喷丝孔长径比，挤出胀大比则呈现下降趋势。当剪切速率增加时，不同质量分数度、不同温度和不同流量的纺丝液及不同长径比的喷丝孔的挤出胀大比也在增加，并且增加程度更加显著。研究结论为分析正三角形喷丝孔纺制二醋酸纤维或丝束的过程提供了依据。

关键词: 二醋酸纤维素, 纺丝溶液, 挤出胀大, 正三角形, 喷丝孔

Abstract:

In order to study the die swell behavior of cellulose diacetate spinning dopes at the exit of a regular triangle spinneret orifice, a laser outside diameter measuring instrument was used to investigate the die swell ratio of spinning dopes of different mass concentrations, temperatures and flowing rates and spinneret orifices of different length/diameter ratios under various shear rates. The results demonstrated that when shear rate was kept constant, with increasing of mass concentrations or flowing ratesof CAD spinning dopes, the die swell ratios gradually increased, but they were in a reduction trend while increasing temperatures of dopes or the length/diameter ratio of spinneret orifices. As shear rate was increased, the die swell ratios of spinning dopes of different mass concentrations, temperatures and flowing rates and spinneret orifices of different length/diameter ratios were increased as well, with more significant increase. The research conclusion provides a basis for the further analysis on the process for spinning CDA fibers or tows by regular triangular spinneret orifices.

Key words: cellulose diacetate, spinning dope, die swell, regular triangle, spinneret orifice

于勤王强范雪荣. 二醋酸纤维素纤维纺丝溶液的挤出胀大行为[J]. 纺织学报, 2015, 36(04): 7-10.

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