Real Time Size Add on Sensing and Adaptive Squeeze Control in High Speed Bast Warp Sizing
Real time microwave sensing and adaptive squeeze roll pressure tuning stabilize bast warp size add-on to maximize loom efficiency and cut yarn breaks.
Sizing Pick up Percentage
Starch Additive Ratio
Mechanical application rates govern the starch additive ratio during the warp preparation phase of Chinese flax yarn production. Starch additive ratio describes the exact dry solid mass retained by the yarn relative to the native dry mass of the raw flax before sizing. Jiangsu mills calculate this metric by weighing dried yarn samples immediately after the size box and comparing those figures against the initial weight of the unsized flax warp.
High proportions stiffen the yarn excessively, which later causes filament breakage on the high-speed air-jet looms. Low proportions fail to bind stray surface fibers securely. Mill technicians record these retention percentages daily within the production ledger for each spinning lot.
Moisture Equilibrium Point
Atmospheric humidity surrounding the drying cylinder directly influences the final moisture equilibrium point of sized flax warps. Absolute water content within the dried yarn must remain strictly between eight and nine percent to prevent microbial degradation during extended storage periods before weaving. Ambient workshop conditions inside Zhejiang weaving sheds frequently challenge this balance because seasonal monsoons alter local vapor pressure rapidly.
Quality inspectors test conditioned samples inside climate-controlled laboratories to verify that residual water percentages comply with international buyer acceptance standards.
Fiber Penetration Depth
Adhesive fluid dynamics dictate the fiber penetration depth within the interior core of single flax yarns during the immersion phase. Surface coating alone proves insufficient for high-tension loom cycles because brittle exterior shells crack under repeated harness friction. Technicians evaluate cross-sectional microscope slides of sized yarn samples to measure how far the sizing solution has migrated toward the central filament bundle.
Adequate core penetration prevents yarn shedding and maintains tensile strength through the final finishing stages before export.