Sizing Quantity
Warp yarn preparation for industrial linen weaving involves applying protective film-forming polymers to prevent yarn breakage from loom abrasion. Mill technicians measure size add-on weight to calculate the percentage of dry sizing solids deposited onto single flax yarns during slasher sizing operations. Target values typically range between six and twelve percent depending on yarn count and weave density.
Applying correct sizing mass improves warp strength without inducing excessive yarn stiffness.
Coating Application
Slasher machines pass warp sheets through size boxes containing heated starch or polyvinyl alcohol solutions before squeezing off excess liquor with heavy rubber rollers. Calculating size add-on weight requires taking dry yarn samples before sizing and after passage through drying cylinders. Technicians desize and dry sample swatches to determine the net mass gain of solid sizing agent relative to un-sized dry yarn weight.
Proper chemical absorption smooths protruding surface fibers, binding them into the core yarn structure to withstand reed friction during high-speed weaving. Moisture meters continuously monitor output sheet moisture to prevent size film baking.
Desizing Threshold
Add-on calculations measure temporary coating mass that must be removed entirely during fabric desizing and scouring before dyeing. Residual size solids remaining in woven cloth inhibit uniform liquor penetration during subsequent wet processing treatments.
