16—an Instrument for Measuring the Coefficient of Friction of Yarns Against Other Materials

Abstract

This paper describes a new instrument for measuring the coefficient of friction of yarn running against a fixed surface. It is a direct-reading instrument in which the fixed object under test need not be of a closely specified form and can be easily changed without the necessity for accurate positioning. The conditions of test, such as initial tension, speed and temperature of the fixed surface can be readily varied. Details of calibration and performance are given together with illustrative results which show that the coefficient of friction is not a yarn constant, but depends on the material of the fixed friction surface and the conditions of test.

Frictional Properties of Nylon Yarn and Their Relation to the Function of Textile Guides

“…On Faradex the coefficient of friction is almost constant, while on chromium plated steel and glass the coefficient increases with speed. This effect of the coefficient increasing with speed was found by Buckle and Pollitt (1948)^ for various yarns rubbing against a stainless steel cylinder.…”

“…Buckle and Pollitt (1948)\ Breazeale (1947)-, Morrow (1931)^ Moss (1951)®, and Viviani and Graziano (1951)® have described methods and instruments used for measuring the coefficient of friction between running yarn and guides and give some results.…”

Dry friction characterisation of carbon fibre tow and satin weave fabric for composite applications

“…The capstan measuring method has been widely applied since the beginning of the twentieth century. The first experiments were performed on cotton, wool, viscose, and nylon tow material [9][10][11]. Other synthetic materials like polyester were studied later as well [12][13][14].…”

Comparative Analysis of Frictional Resistance of Wool Yarns

“…Many instruments work on the principle of motion of a cylindrical surface relative to the measured body wrapped around it (group D according to Kragielski [ 14 ] ) . The devices in this group can be further classified depending on which part of such an apparatus is moving, the cylindrical surface [ 24 ] or the yarn [ 1,3,[5][6]34 ] . The first kind of device can be used to determine fiber and fabric friction coefficients; the second is used for yams.…”