本文通过测定塑化曲线确定聚乙烯(PE)的毛细管挂丝温度范围,测试了挤出原丝和低温区域拉伸丝的力学性能和热收缩行为。结果表明,低压下的毛细管挤出工艺对 PE 丝的力学性能影响很小,而低温区域拉伸能大幅度提高原丝的力学性能,产生自增强效应,但热收缩率明显增大。 In this paper, the plasticization curve was used to determine the capillary temperature range of polyethylene (PE), and the mechanical properties and heat shrinkage behavior of the extruded filaments and the drawn yarn in the low temperature range were tested. The results show that the capillary extrusion process at low pressure has little effect on the mechanical properties of PE wire, while the tensile at low temperature can greatly improve the mechanical properties of the precursor, resulting in self-reinforcing effect, but the heat shrinkage increased significantly.