Wax Application and Yarn Lubrication in Sizing
topic
Wax application during sizing uses solid wax rollers or emulsion systems applying paraffin or carnauba wax to sized yarn surfaces after drying at 0.3 to 1.5 percent on yarn weight, reducing the coefficient of friction of the size film surface that would otherwise be too high for smooth passage through heddle eyes and reed dents at weaving speeds, with wax add-on optimisation balancing the friction reduction benefit against the adhesion reduction that excess wax causes at splice locations.
Role
Reduces sized yarn-to-heddle friction that would cause excessive heddle wear and warp breaks from the mechanical abrasion of stiff sized yarn moving through heddle eyes at high speed, with wax addition being an essential complement to the adhesive size coating that provides abrasion resistance but whose inherently rough surface without lubrication would create the friction-induced wear that size protection is intended to prevent.