Effect of Polyglycol Ethers on the Frictional Properties of a Hemispherical Yarn

The effect of polyglycol ethers on the frictional properties of a 22 tex 35%wool/65% polyester fiber blend yarn was examined. During external friction the yarn moves in the direction perpendicular to the relative velocity vector as determined by the dynamic coefficient of friction. In this case, the formation and rupture of bonds between the yarn and the loom component is localized in a thin surface layer. During internal friction the surface of contact between the fibers in the yarn is continuous and independent of the load. Laminar motion of fibers during friction occurs in the direction of the vector of relative velocity and is determined by the coefficient of tangential resistance. In the case of internal friction the deformation spreads across the volume of the yarn, thereby affecting the strength characteristics of the fibrous material. The efficiency of mechanical processing of the wool blend yarn can be improved by using polyglycol ethers as a lubricant which beneficially affects the frictional properties of a fibrous material.