Paper Title
DEVELOPING KNITTED FABRICS WITH ELECTROMAGNETIC SHIELDING PROPERTIES

Abstract
This study investigates the influence of conductive yarn content on the electromagnetic shielding effectiveness (EMSE) and surface resistivity of knitted fabrics. The fabrics, made with conductive core-spun yarns and 100% cotton yarns, were produced using consistent knitting pattern types and yarn counts, allowing for a comparative analysis of the impact of conductive material quantity. Results indicate a clear inverse relationship between surface resistivity and conductivity, with fabrics containing higher amounts of conductive yarn demonstrating lower surface resistivity and superior shielding performance. Notably, fabrics coded S10-46, S20-46, R10-45, R20-45, I10-49, and I20-49 exhibited significantly better EMSE, particularly in the 0.1-0.6 GHz frequency range, where they performed better than their counterparts. However, a gradual decline in EMSE was observed at higher frequencies, suggesting that metal conductive wires are more effective at shielding electromagnetic radiation at lower frequencies. The shielding mechanisms of absorption and reflection were also evaluated, with absorption consistently surpassing reflection across all fabric types in the 0.1-3 GHz range. These findings highlight the critical role of conductive material quantity and fabric structure in optimizing EMSE for applications in electromagnetic radiation shielding. Keywords - Electromagnetic Shielding, Knitting, Fabric, Cotton, Conductivity, Stainless Steel, Ring Spinning.