镀银纱线织物和石墨涂层织物电磁屏蔽效能分析

Analysis on electromagnetic shielding effectiveness of fabrics with silver plating yarns and graphite coating

针对电磁辐射污染问题,应用棉/莫代尔纱线(CM)、镀银纱线(SP)、涤纶/棉纱线(PC)和涤纶长丝(PF)4种纱线织造13种织物,并对其中8种织物进行表面石墨涂层处理,应用矢量网络分析仪测试了不同比例镀银纱线织物和不同结构石墨涂层织物的电磁屏蔽效能。试验结果显示,镀银纱线织物的电磁屏蔽效能低于具有均匀银镀层的市售机织物和针织物;镀银纱线织物的表面电阻随着镀银纱线含量的增加而降低,电磁屏蔽效能随着镀银纱线含量的增加而增加。石墨涂层CM/PC织物和石墨涂层CM/PF织物的表面电阻在20~40 kΩ/cm,其最大的电磁屏蔽效能分别为1.2 dB和4.2 dB。

Aiming at the problems of electromagnetic radiation pollution, 13 kinds of fabrics are woven with 4 kinds of yarns such as cotton/modal yarn （CM） , silver plating yarn （SP） , polyester/cotton yarn （PC） and polyester filament （PF） , ere, and 8 kinds of fabrics among them are coated with graphite coating. Vector network analyzer is used to test electromagnetic shielding effectiveness （EMSE） of the fabrics. Experimental results show that the EMSE of silver plating yarn fabric is superior to the commercial plating fabric with even silver coating. Surface resistance of fabrics decreases and their EMSE increases with increasing silver plating yams. The surface resistance of graphite coating fabrics is from 20 kΩ/cm to 40 kΩ/cm, and maximum EMSM of CM/PC and CM/PF graphite coating fabrics are 1.1 dB and 4.2 dB respectively.