Boundary Friction of Textile Yarns

Abstract

A method and apparatus for determining the boundary friction of textile fibers are described. Mineral oil and oleic acid are shown to be ineffective boundary lubricants for "Dacron," ¹ nylon, acetate, rayon, and polyacrylonitrile fibers. Stearic acid and n-octadecylamine reduced the boundary friction compared to that of the clean fibers. Polyacrylic acid grafted to nylon gave low boundary friction when treated with n-octa decylamine. Oleic acid formed an elective boundary film on chrome which gave low friction when rubbed by various textile fibers and was stable at temperatures up to 160° C. Lubricants had no effect on the boundary friction of "Teflon." ² These results are interpreted in terms of adsorption of the lubricants on the rubbing surfaces.

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