The coefficients of friction of various fibers by roeder's method

Abstract

The static and kinetic coefficients of friction of various fibers were systematically measured by Roeder's method at the velocity ranging from 0 to 20 m/min. Fibers tested were viscose rayon, cupra, polynosic, acetate, nylon 4, nylon 6, nylon 11, Nomex, Kevlar, polyester, alkali treated polyester, polyethylene, polypropylene, vinylon having cocoon-like or circular cross-section, silk, and wool, respectively. In order to confirm the effect of shape of cross-section, the coefficients of friction of polyester and nylon filaments having various shapes such as circular, trilobal, pentagonal, pentalobal and octalobal were also measured. All fibers tested except wool moved in scale direction, showed similar relation of the coefficient of friction with the circumferential velocity of the cylinder, i.e. the value decreased with increasing velocity at the initial stage and showed a minimum at the velocity 1 m/min., gradually increased and levelled off at around 10 to 20 m/min. Wool gave different values depending on the direction of rubbing. The effect of alkali treatment of polyester fiber was also examined. © 1985, The Society of Fiber Science and Technology, Japan. All rights reserved.