Drafting Area
Mechanical deformation occurs in the wedge-shaped region of unspun fibers situated between the delivery rollers and the nip point of the twisting mechanism. Within this zone, the dynamic draft triangle governs how the individual flax strands are drawn out before being twisted into yarn. The physical boundary of this area shifts constantly depending on the feed rate of the roving and the spindle speed.
Spun fibers are held in tension here, and any instability in the triangle size leads to yarn unevenness, which is why technicians inspect the roller settings during every shift change.
Drafting Tension
Tension fluctuations within the dynamic draft triangle directly affect the frequency of thread breakages on wet spinning frames. If the triangle becomes too elongated, the fibers lose their parallel alignment and create thick and thin spots in the final linen yarn. Spinners maintain high relative humidity in the spinning room to ensure the flax pectin remains sufficiently pliable to withstand the drafting tension.
Fibre Stability
Production logs for export-grade linen record the frequency of draw-zone failures to evaluate the flax fiber grades. High-quality fibers with long staple lengths create a stable dynamic draft triangle that resists tearing under high draft ratios. This mechanical stability ensures the yarn meets tensile standards.
