Sheath-core spinning of multilobal conductive core filaments

Claim 1

A novel synthetic sheath-core bicomponent filament having antistatic properties comprising a continuous nonconductive sheath of a synthetic thermoplastic fiber forming polymer selected from the group consisting of polyester and polyamide surrounding an electrically conductive polymeric core, constituting from 0.3% to 35% of the filament cross-section, said polymeric core comprised of 20 to 35% of electrically conductive carbon black dispersed in polyethylene, the cross-section of said core having from three to six lobes and a modification ratio of at least 2, with each lobe having an L/D ratio of from 1 to 20, where L is the length of a line drawn from the center point of the line between low points of adjacent valleys on either side of the lobe to the farthest point on said lobe, and D is the greatest width of the lobe as measured perpendicular to L.