Wet Spun Linen Warp Tensile Strength and Single End Breakage
Wet spun linen warp breaking strength depends on low strength CV and elastic sizing film to resist cyclic shed tension and prevent single end loom stops.
Slasher Sizing Pickup
Add-on Metric
Warp preparation quality metrics evaluate chemical coating volume against dry yarn mass before fabric formation. The slasher sizing pickup quantifies the dry weight percentage of protective size paste added to the warp yarn sheet during slasher processing. Spun linen yarns require an optimum size pickup, typically between eight and fourteen percent, to bind surface fibers without reducing natural elasticity.
Slasher room records detail initial dry yarn mass and final oven-dry beam weights to calculate exact pickup figures for each sizing lot.
Process Control
Squeegee roller pressure, size box temperature, liquor viscosity and machine speed determine the wet pickup volume absorbed by the yarn sheet. Excess pickup creates stiff, brittle yarns that crack during shedding, whereas insufficient pickup allows surface fibers to pill and fray under reed impact. Drying cylinders following the size box must evaporate water at controlled rates to prevent skinning, where size forms a hard outer shell without penetrating yarn bundles.
Technicians adjust squeeze roller pneumatic pressure continuously to maintain uniform size add-on across thousands of warp ends.
Performance Boundary
Buyer specifications mandate strict compliance with target pickup ranges to ensure predictable desizing performance during fabric finishing. Deviations in pickup percentage cause uneven desizing, leading to shade variations in subsequent dyeing procedures.