亚麻/聚丙烯针织结构预制件及其力学性能

Flax/polypropylene weft knitted composites preform and the mechanical properties

为探讨制备环保型民用纺织复合材料的新途径,利用横机开发了以亚麻为增韧纤维,聚丙烯为基体的亚麻/聚丙烯针织结构复合材料预制件小样,并对其拉伸、弹性回复和顶破强力等力学性能进行测试,分析影响其力学性能的有关因素。研究表明:亚麻纱与聚丙烯长丝合股可有效改善其可编织性;亚麻与聚丙烯纤维体积分数比为50∶50的针织结构预制件的拉伸断裂性能、弹性回复性能及顶破强力都较优;四平结构预制件的拉伸断裂性能、顶破强力优于罗纹结构,而罗纹结构预制件的弹性回复性能优于四平结构;弯纱深度较小时,亚麻/聚丙烯针织结构预制件的力学性能较好。

For developing new ways of producing the flax/polypropylene （PP） composite samples environmentally protective textile composites for civil use, was made with polypropylene as substrate and flax as reinforcing material on a fiat machine. The mechanical properties of the samples such as the tensile strength elastic recovery and bursting strength were tested and affecting factors were analyzed. The research shows that it is effective to improve its knitability by mix-knitting with the flax and PP. The samples have better tensile strength, elastic recovery and bursting strength when the volume fraction of flax/PP fiber is 50 ： 50. In respect of the tensile strength and bursting strength, the sample of full gauge rib stitch is advantageous over that of rib stitch, and vice versa in respect of elastic recovery. The sinker depth directly influences the mechanical properties of the flax/PP knitted samples, and it is recommended that sinker depth be small.