Friction and Lubrication of Synthetic Fibers

Abstract

The effect of guide temperature, loopsize, pretension, denier, and moisture regain of multifilament yarns on friction are presented. Heat stable lubricants show a continuous decrease in friction with increasing temperature, whereas volatile lubricants pass through a minimum in friction with increasing temperature. The increase in friction with increasing angle of contact, increasing pretension, increasing denier and increasing moisture regain is attributed to an increase in area of contact. In line with Part I, the data of the present paper support the contention that intermittent contacts between fiber and substrate exist in the boundary regions, whereas a continuous fluid film separates fiber from substrate in the hydrodynamic region.