Abstract: A fine heterogeneous hybrid spun yarn is blended from electrostatically conductive staple fibers and electrostatically non-conductive staple fibers so that the yarn is electrostatically conductive only over short discrete lengths. When used in pile fabrics, such as carpets, the fine yarn is introduced with at least some of the carpet facing yarns during the carpet making operations. The resultant carpet structure substantially eliminates electrostatic shock to a human walking across the carpet and approaching a ground such as a light switch, radio, or another person. Such a carpet does not constitute a dangerous floor covering.The unique heterogeneous hybrid spun blended yarn is achieved by process techniques completely contrary to accepted blending practices.

Abstract: A transparent static reducing mat has a transparent plastic substrate. A number of thin conducting essentially invisible fibers are on the substrate in a static-charge-draining conducting layer and are covered by a transparent partially conductive layer of plastic material contacting the conducting layer of thickness much less than the thickness of the transparent substrate.

Abstract: This invention describes a transparent chair mat having anti-static qualities. The chair mat is substantially transparent thereby permitting the carpet thereunder to be readily seen. The chair mat can be gounded or not, as desired. This anti-static chair mat enables castered chairs to roll over it without the person sitting in the chair generating excess static-electricity.

Abstract: An anti-static carpet in which the sole conductive layer is a secondary backing having a surface resistivity less than 10.sup.11 ohms per square. In the disclosed embodiment, the secondary backing includes a backing base and a conductive composition coating on the upper side of the base. The conductive composition comprises latex and carbon black and is applied to the backing base before the secondary and primary backings are attached to each other.