不锈钢丝包芯纱针织物电磁屏蔽性能研究

采用涤纶长丝、棉粗纱和超细316L不锈钢丝在HN32-04型棉纺花式捻线机上纺制不锈钢丝包芯纱,并在龙星LXC-252SCV型电脑横机上编织纬平针织物及浮线添纱针织物。介绍纺纱原理及编织工艺,并测试不锈钢丝包芯纱的拉伸性能以及针织物的电磁屏蔽效能。结果表明,不锈钢丝包芯纱的平均拉伸断裂强力为38.96 N,位移为124.30 mm,其拉伸过程分为不锈钢丝断裂、纱线中纤维抽拔、纱线断裂过程。随着电磁波频率的不断增强,纬平针织物和浮线添纱针织物的电磁屏蔽效能下降。针织物结构不同,织物紧密程度和线圈大小不同,对不同频段电磁波的屏蔽能力也不同。

Study on Electromagnetic Shielding Performance of Stainless Steel Wire Core-spun Yarn Knitted Fabric

The stainless steel core-spun yarn was spun on HN32-04 type cotton spinning fancy twister by using polyester filament,cotton roving and ultra-fine 316L stainless steel wire,and plain knitted fabric and float plaiting fabric were knitted on Longxing LXC-252SCV computerized flat knitting machine.The spinning principle and knitting process were introduced,and the tensile properties of stainless steel wire core-spun yarn and the electromagnetic shielding effectiveness of knitted fabrics were tested.The results show that the average tensile strength and displacement of the stainless steel wire core-spun yarn is 38.96 N and 124.30 mm respectively.The stretching process can be divided into stainless steel wire breaking,fiber drawing and yarn breaking.With the increasing of electromagnetic wave frequency,the electromagnetic shielding effectiveness of plain knitted fabric and floating plaiting knitted fabric decreases.Different knitted fabrics have different structure,tightness and loop length,and different shielding ability to electromagnetic wave of different frequency band.