Continuous synthetic filaments which are capable of holding an electrostatic charge sufficient to separate the filaments from each other include those comprised of polyamides, such as poly(hexamethylene adipamide), polycaproamide and/or copolymers thereof; polyesters, such as poly(ethylene terephthalate), poly(hexahydro-pxylene terephthalate), and/ or copolymers thereof; polyhydrocarbons, such as