聚乙交酯纤维纺丝工艺研究

The Study of Spinning Technology for PGA Fiber

采用改变纺丝速度、拉伸工艺以及测试纤维内应力、声速值、强度值等方法对聚乙交酯(PGA)的纺丝加工工艺及纤维的力学性能进行了分析研究。结果表明:纺丝速度对PGA初生纤维的取向度几乎没有影响,后拉伸能有效提高纤维的取向度及强度。低速纺丝得到的初生纤维内应力较小,可以进行高倍后拉伸,而高速纺丝得到的初生纤维内应力较大,只能进行低倍后拉伸。适当的加温以及低速拉伸有利于得到较高强度的PGA纤维。总体来说,要得到具有较好力学性能的PGA纤维,必须采用低速纺丝、高倍后拉伸、低速拉伸相加的工艺路线。

The spinning technology for preparing PGA fiber was studied in this paper. The methods of measuring fiber internal stress, sonic velocity, tenacity and adjusting spinning speed, drawing temperature and rate were explored to analyses the mechanical properties of PGA fiber. The results showed that winding speed had little effect on the orientation degree of freshly spun fiber and it was the subsequent drawing that could effectively increase the fiber orientation degree. The freshly spun fiber with low internal stress spun at lower speed could be high drawn, while the freshly spun fiber spun at higher speed could only be drawn slightly due to its strong internal stress. Suitable drawing temperature and slow drawing rate were profitable for making PGA fiber with high tenacity. Generally speaking, PGA fiber with perfect mechanical performance could only be made by lower winding speed and higher post drawing as well as slow drawing rate.