2—THE FRICTION AND LUBRICATION OF YARNS

Abstract

In an earlier paper, a general theory of the surface friction of solids was proposed. This theory is used to deduce the relation between the on-going and the off-going tensions in a yarn as it traverses a cylindrical object. Experimental verification of the validity of this relationship has been obtained both with continuous filament yarns and with spun yarns. An experimental investigation of the influence of lubrication and of temperature on the frictional behaviour of spun yarns and of the influence of object roughness and running velocity on the frictional behaviour of both continuous filamerit and spun yarns has been conducted. An explanation of the results of this investigation is proposed in terms of the above-mentioned theory.