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纺织学报  2015 

二醋酸纤维素纤维纺丝溶液的挤出胀大行为

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Keywords: 二醋酸纤维素,纺丝溶液,挤出胀大,正三角形,喷丝孔

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Abstract:

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。

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