Conductive woven fabrics made of metallic/modal core yarns: manufacturing techniques and electromagnetic shielding effectiveness

We independently invented the feeding wire device and combined it with the drawing device of the spinning frame to accurately realize the wire in the middle of the core yarn, effectively solve the problem that the wire is easy to expose the fabric surface. Using a degradable and environmentally friendly modal as roving, Cu and SS as conductive yarns, preparing conductive fabrics, and exploring the effect of shielding networks, lamination layer number, lamination angle, and number of metallic wires. When both the warp and weft yarns are composed of conductive core yarns, the conductive woven fabrics with lamination angle of 0 degrees can build a complete conductive network, and the average EMI SE of single-layered conductive woven fabrics is 30 dB. When only the weft yarn is composed of a conductive yarn, varieties of lamination angles and lamination layers improve the EMI SE of the conductive woven fabrics considerably. However, the shielding value of the two metal fabrics is not a multiple of the single metal fabric. Increasing the lamination layers, the thickness of the fabric will increase, and the gas permeability and SSE/t value decrease.

Automated summary

We invented a feeding wire device and combined it with the drawing device of the spinning frame to accurately position the wire in the middle of the core yarn. This solves the problem of wire exposure on the fabric surface. We used degradable and environmentally friendly modal as roving, Cu and SS as conductive yarns, and explored the effects of shielding networks, lamination layer number, lamination angle, and number of metallic wires. Conductive woven fabrics with a lamination angle of 0 degrees and both warp and weft yarns composed of conductive core yarns can build a complete conductive network. The average EMI SE of single-layered conductive woven fabrics is 30 dB. When only the weft yarn is composed of a conductive yarn, various lamination angles and layers significantly improve the EMI SE of the conductive woven fabrics. However, the shielding value of the two metal fabrics is not a multiple of the single metal fabric. Increasing the lamination layers increases the fabric thickness and reduces gas permeability and SSE/t value.