Conducting polyester PET and polyamide PA- 6 fibre and fabrics were prepared by in- situ chemical oxidative polymerisation using super critical fluid assisted process. The fibre materials and cloths produced were characterized by means of FTIR, WAXD, SEM, and DSC and two- probe resistivity. The samples were studied also by means of washing them several times. Homogeneous treated fibre materials with sustainable properties were produced. Melt spun fibre material of inherently conducting polymer blends have been reported earlier. Reasonable mechanical and electrical properties ( resistance of 10(5)...10(7) Omega/cm) are typical for blend of polypropylene and polyaniline. With bi- component extrusion technology the fibre as good as 10(3)...10(5) Omega/cm is reachable. (c) 2005 Springer Science+ Business Media, Inc.