Process for producing antistatic yarns

A process for producing a conductive supported yarn comprising:

• melt spinning non-conductive nylon filaments to form a first set of filaments;
• separating at least one of the filaments from the freshly spun first set into a second set of filaments;
• providing the second set of filaments to a suffusion coating process wherein conductive material is suffused into the second set so that after said providing, the suffusion coated second set has a resistivity of between about 10.sup.6 and about 10.sup.9 .OMEGA./cm;
• recombining the first set and the second set to form a conductive supported yarn;
• and
• subjecting both sets to a source of latent non-symmetrical stress prior to said providing.

A process for preparing an electrically conductive fiber comprising a filamentary polymer substrate having finely divided, electrically conductive particles uniformly suffused in an annular region located at the periphery of the filament and extending the entire length thereof comprising;

• melt-spinning a filament of a fiber forming polymer directly without winding to a suffusion coating apparatus;
• continuously suffusing electrically conductive particles uniformly in an annular region at the periphery of the filament such that after said suffusing the filament is electrically conducting;
• and
• winding the resulting suffused filament.

A process for preparing an electrically conductive fiber comprising a filamentary polymer substrate having finely divided, electrically conductive particles uniformly suffused in an annular region located at the periphery of the filament and extending the entire length thereof comprising:

• melt-spinning a filament of a fiber forming polymer directly without winding to a suffusion coating apparatus;
• continuously suffusing electrically conductive particles uniformly annular region at the periphery of the filament such that after said suffusing the filament is electrically conducting;
• winding the resulting suffused filament;
• and
• subjecting said filament to a source of latent non-symmetrical stress prior to said suffusing.

A process for preparing multifilament conductive yarn comprising:

• melt spinning at least two filaments of a fiber forming polymer directly without winding to a suffusion coating apparatus;
• continuously suffusing electrically conductive particles uniformly in an annular region at the periphery of each filament such that after said suffusing each filament is electrically conducting thereby creating a multifilament conductive yarn;
• and
• winding the resulting multifilament yarn.

A process for preparing multifilament conductive yarn comprising:

• melt spinning at least two filaments of a fiber forming polymer directly without winding to a suffusion coating apparatus;
• continuously suffusing electrically conductive particles uniformly in an annular region at the periphery of each filament;
• such that after said suffusing each filament is electrically conducting thereby creating a multifilament conductive yarn;
• winding the resulting multifilament yarn;
• and
• subjecting at least some filaments to a source of latent non-symmetrical stress prior to said suffusing.