机织针织复合织物与多层双轴向纬编织物拉伸性能对比

摘要

为给机织针织复合(CWK)织物的应用提供参考,选用玻璃纤维作经纱、纬纱,高强涤纶作针织纱分别编织机织针织复合织物和多层双轴向纬编(MBWK)织物,测试2种织物的横、纵向拉伸性能,分析比较拉伸负荷和位移特征曲线.结果表明:2种织物的轴向拉伸性能有较好的相似性；轴向拉伸时,在伸长较小的状态下,先由轴向的纬纱或经纱承担较高的拉伸负荷,直至纬纱或经纱拉断,然后再由织物中的针织结构体,在伸长较大的状态下,承担较低的拉伸负荷,直至针织结构体拉断.经纱和纬纱以交织形式衬入针织结构中,使得CWK织物轴向的拉伸强度稍低于MBWK织物,但起到一定的预牵伸作用,可使针织纱对经纱和纬纱捆绑效果更好.%To provide a reference for the application of the co-woven-knitted (CWK) fabric, the CWK fabric and multi-layered biaxial weft knitted (MBWK) fabric are produced with the same yarns and loop length, using glass filaments as inserted yarns and high tenacity polyester as stitch yarn. Tensile tests are carried out in the wale and course directions of the two fabrics, and their stress-strain curves are compared. The results revealed that axial tensile properties of the two fabrics have good similarity, inserted yarns bear high load in low elongation to failure, and then, the knitted structure commits the low load in high elongation until it damages. Interwoven between warp and weft yarns leads to large buckling of them, the strength of the CWK fabric is lower than that of the MBWK fabric, but the interwoven makes knitting yarn in a state of pre-draft, so that the knitting yarn has the role of better bundled on warp and weft.