EXPERIMENTAL RESEARCH ON THE SEWABILITY OF FERROMAGNETIC MICRO-WIRES

The paper presents the results of research on the insertion of an amorphous micro-wire with magnetic properties in linear textile structures by sewing. The micro-wires have been produced of FeBiSn alloy coated with thin glass layer. The high magnetic permeability and the small diameter (20-40 μm) recommend these wires as absorbent or reflecting element on high frequency, tens GHz range. The analyses of the stresses specific to the sewing process emphasize the utility of the unbalanced lock-stitch structure for anchor the micro-wires on the surface of plain textiles. To evaluate the seam quality, two parameters were measured: ▪the micro-wire retention in the stitch structure (Rt, cN), and ▪the micro-wire tensile breaking strength changing index (%).