Abstract

Ring spun composite yarn (RCY; 755 denier) with linear resistance of 172 Ω/m is prepared with stainless steel (SS) fibre and polyester fibre in ratio of 80%: 20% (w/w). Sheath core yarn system, core being ring spun yarn and PET fibre as sheath material is prepared in various fibre compositions adopting friction spinning technique. For microwave interaction and EMI shielding, hybrid woven fabrics are prepared using sheath-core yarn in weft and SS/PET blended yarn (20% SS/80% PET) in warp in cell structured and rib structured weave design. Samples of woven fabric were evaluated for microwave and EMI shielding properties in frequency range of 8.2–18.0 GHz in parallel and perpendicular polarisation of electromagnetic wave (em wave). Samples having conducting yarn in warp and weft both have shown high reflection in both polarisation of em wave. Sample containing metal fibre content of 32.58% (w/w) prepared in cell-structured weave design containing 1330 and 2017 denier sheath-core yarn in weft and 165 denier (20% SS/80% PET) blended yarn in warp offered reflection of 89.4922–59.9864% in parallel mode and 92.8135–80.0789% in perpendicular mode. This offered EMI shielding of −30.9601 to −35.4659 dB in perpendicular and −17.0209 to −11.2131 dB in parallel mode in 8.2 − 18.0 GHz. Woven fabrics are highly breathable, its air permeability lies in the range of 22.5–26.2 ft³/ft²/s. It inherits high aesthetic values. This hybrid woven fabric finds potential applications in radar camouflage, protection of human being from hazardous effect of microwaves, EMI shielding and electrostatic discharging cover materials, etc.

摘要

采用不锈钢（SS）纤维和涤纶纤维按80%：20%（w/w）的比例制备线性电阻为172Ω/m的环锭纺复合纱（RCY；755旦尼尔）。鞘芯纱体系，芯为环锭纱，以PET纤维为鞘材，采用摩擦纺技术制备多种纤维组合物。对于微波相互作用和 EMI 屏蔽，混合机织物是在纬纱中使用鞘芯纱和在经纱中使用 SS/PET 混纺纱（20% SS/80% PET）在单元结构和罗纹结构编织设计中制备的。在 8.2–18.0 GHz 的频率范围内，以电磁波（em 波）的平行和垂直极化方式评估机织织物样品的微波和 EMI 屏蔽性能。经线和纬线均具有导电纱线的样品在 em 波的两种偏振中均显示出高反射。样品含有 32.58% (w/w) 的金属纤维含量，采用蜂窝结构编织设计，纬纱为 1330 和 2017 旦尼尔皮芯纱，经纱为 165 旦尼尔（20% SS/80% PET）混纺纱，反映了平行模式下为 89.4922–59.9864%，垂直模式下为 92.8135–80.0789%。这在 8.2 - 18.0 GHz 中提供了 -30.9601 至 -35.4659 dB 的垂直 EMI 屏蔽和 -17.0209 至 -11.2131 dB 的并行模式。机织面料透气性好，透气度在 22.5–26.2 英尺范围内 这在 8.2 - 18.0 GHz 中提供了 -30.9601 至 -35.4659 dB 的垂直 EMI 屏蔽和 -17.0209 至 -11.2131 dB 的并行模式。机织面料透气性好，透气度在 22.5–26.2 英尺范围内 这在 8.2 - 18.0 GHz 中提供了 -30.9601 至 -35.4659 dB 的垂直 EMI 屏蔽和 -17.0209 至 -11.2131 dB 的并行模式。机织面料透气性好，透气度在 22.5–26.2 英尺范围内³ /英尺² /秒。它继承了很高的审美价值。这种混合机织物在雷达伪装、保护人体免受微波有害影响、EMI 屏蔽和静电放电覆盖材料等方面具有潜在应用。