Electrostatic Properties of Finished Cellulose Acetate Yarn1

Abstract

Instruments are described to. measure the resistance of yarn samples and the charge build-up on the yarn as it is rubbed against a metal post. The resistance of acetate yarn can be calculated from the specific conductivity of the finish solution; the resistance of rayon yarn is much lower and is more affected by the yarn itself. The resistance of the sample determines how fast charge can leak off. If the resistance is smaller than 10¹² or 10¹³ ohms in., charge cannot be detected at some distance from the point of generation, The generation of the charge is not well understood. A quantitative relation does exist between the charge on the yarn and the angle of wrap and the yarn tension. It is very desirable that the antistatic agent help to spread the finish solution over the yarn surlace.