Teijin Limited

Junzo Handa

Tadashi Hirakawa

Shunzo Mitsui

An antistatic composite yarn is obtained by wrapping a core yarn with a covering yarn. The core yarn has an electrically conductive coating thereon which comprises a polymeric matrix and a finely divided electrically conductive material therein. The antistatic composite yarn and a pile yarn are used to produce a tufted antistatic carpet. Polyamide fiber is preferably used as the covering yarn and the pile yarn. The covering yarn contains at least 40% by weight of polyamide fiber, whose content of amino end group is at least 1.0.times.10.sup.-5 mol/g higher than that of polyamide fiber contained in the pile yarn. In the case the pile yarn is composed of at least two kinds of polyamide fibers which differ from one another in the content of amino end group, one of the polyamide fibers has the content of amino end group at least 1.0.times.10.sup.-5 mol/g lower than that of another.

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Ohtsu, Japan

Junzo Handa