Preparation and Power Frequency Shielding Effectiveness of Stainless Steel Conductive Fabric

Abstract

In order to prepare the shielding fabrics with high efficiency of power frequency(PF) shielding and excellent electrical conductivity, different ratios of aramid/stainless steel fiber blended yarns were used to weave the shielding fabrics with different specifications. The fabric structure, fabric areal density, number of fabric layers, embedding ratio of copper-clad wires wrapped aramid yarns(denoted as CCWWA) and embedding direction were designed, and a total of 34 different types of shielding fabrics were woven for testing. The experiments were mainly conducted to study the influence mechanism of various factors on the PF shielding effectiveness by testing the electrical conductivity and PF shielding effectiveness of the fabrics. The research results indicate that the PF shielding effectiveness improves with increasing fabric areal density and metal fiber content. The fabrics embedded with CCWWA, particularly those with bidirectional embedding, exhibit a significant enhancement in the PF shielding effectiveness, showing an increase of 8-20 dB compared to the fabrics without CCWWA. The PF shielding effectiveness varies across different fabric structures, with plain weave fabrics demonstrating the superior PF shielding effectiveness due to their compact structure. Non-conductive base fabric has minimal impact on the PF shielding effectiveness. As the number of fabric layers increases, the PF shielding effectiveness initially improves but then declines, peaking with double-layer fabrics.

Keywords

stainless steel blended fabric / power frequency / shielding effectiveness / conductivity / safety protection

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