Optimizing Warp Sizing Polymer Add-on Levels for Air-Jet Weaving Efficiency
Optimizing sizing polymer add-on levels balances yarn hairiness reduction against shed dusting to maximize air-jet loom efficiency and lower desizing costs.
Dry Size Add-on Percentage
Applied Mass
Gravimetric analysis of sizing solids deposited onto spun or filament warp yarns establishes the baseline material coating required to withstand mechanical stresses during weaving operations. A baseline measurement of dry size add-on percentage compares the bone-dry weight of unsized yarn against the bone-dry weight of sized yarn after desizing or before application. Mill auditors verify this value through standardized oven-drying procedures to ensure proper film formation across the warp sheet.
Insufficient sizing leaves protruding fibers exposed to intense friction from reeds and drop wires. Excessive deposit causes filament brittleness and waste.
Abrasion Resistance
Mechanical strength and fiber cohesion in warp yarns increase when film-forming polymers bind outer fibers to the core structure during slasher impregnation. Applying a targeted dry size add-on percentage reduces loom stops caused by warp end breakages in high-speed air-jet and rapier weaving machines. Film toughness absorbs repetitive cyclic tension while preventing fiber shedding inside the harness eyes.
Desizing Mass
Washing procedures in finishing plants rely on exact knowledge of applied dry polymer mass to calibrate chemical baths and wash box temperatures. Standard formulas for dry size add-on percentage provide the mass baseline needed to compute enzymatic or oxidative bath concentrations during preparation. Incomplete removal downstream impairs subsequent dyeing uniformity and chemical absorption.
Deposition Limit
Upper limits of polymer application depend heavily on yarn linear density, fiber blend, twist factor, and loom reed density. When the dry size add-on percentage exceeds recommended technical limits for fine combed cotton yarns, warp flexibility drops sharply and causes stiff reed marks. Low limits lead to severe shedding.