Kilos in against Metres out at a Jiangsu Mill Audit
Reconciling raw European flax dry mass against finished fabric metres out exposes certified fiber dilution, protecting buyers from origin fraud in Jiangsu mills.
Warping Size Add-on
Viscosity Ceiling
Protective starch layers applied during warp preparation require precise control before yarns face high tension on the loom. A warping size add-on governs dry pickup rates across cellulosic warp lines to prevent breakage during shuttle passage. Mills calculate pickup percentages by comparing dry yarn mass against coated mass after drying cylinders evaporate excess moisture.
The boundary of application ends when sizing baths transfer to slashing frames, because wet state deposition follows separate rheological laws.
Film Uniformity
Starch paste penetration depends heavily on nip pressure applied at the size box squeeze rollers. Mechanical force drives adhesive solids into the core of flax yarns, bonding stray protruding fibers to reduce hairiness. Weak nip pressure leaves surface films brittle, causing high shedding during shedding motions on air jet looms.
Conversely, excessive mechanical loading strips away required coating thickness, exposing raw fibers to abrasive friction against metallic heddle wires.
Tensile Resistance
Coated yarn samples undergo laboratory breaking load testing to verify compliance with buyer acceptance thresholds before bulk weaving begins. Quality inspectors pull conditioned specimens on constant rate of extension testers, recording maximum force values and elongation percentages at rupture. Factory specifications demand higher breaking loads than standard commercial purchase orders stipulate, creating an internal buffer against unexpected variations in raw flax fiber strength.
The final breaking tenacity of sized warp yarns dictates maximum loom operational speeds across industrial workshops.