Hot Melt Sizing for Synthetic Filament Yarns
topic
Hot melt sizing applies thermoplastic wax or polymer size in molten form at 80 to 120 degrees Celsius to filament yarn ends using heated roller applicators, with immediate solidification on cooling providing a size coating without aqueous drying stage; the solidified hot melt size is removed from fabric by thermal or solvent treatment and presents no wastewater treatment challenge from aqueous size effluent.
Role
Provides an energy-efficient sizing alternative for synthetic filament warp yarns where the hydrophobic fibre surface reduces adhesion of aqueous size systems, with hot melt sizing avoiding aqueous solution preparation, cooking, and heating energy while enabling complete size removal by heating alone without enzymatic or chemical desizing processes that add process cost and effluent treatment burden.
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