Reed Marks and Starting Marks Read Back to the Loom
Greige reed marks and starting marks map directly to reed wire spacing and loom stoppage dynamics, requiring electronic let-off adjustment to eliminate defects.
Flax Stress Relaxation
Viscoelastic Behavior
Time-dependent tension reduction in natural fibers held at a constant elongation illustrates their viscoelastic character during high-speed industrial processing. Analyzing flax stress relaxation helps spinning mills configure the drafting zones to prevent fiber breakage and yarn irregularities. This mechanical property depends on the moisture content and temperature of the flax roving during the wet spinning process.
Correct tension adjustments ensure uniform fiber flow during drafting.
Mechanical Drafting
During wet spinning, the flax fibers are drawn through hot water to soften the pectins that bind the individual fiber bundles together. As the roving is stretched between the drafting rollers, the internal stress within the fibers begins to decay rapidly due to molecular rearrangement. This decay prevents excessive tension build-up that would otherwise snap the fibers or damage the spinning equipment.
Engineers measure this rate of decay to determine the optimal distance between the feed and drafting rollers. A faster decay rate allows for higher drafting speeds and more efficient yarn production.
Yarn Strength
Insufficient tension decay leads to uneven fiber distribution and causes thick places in the spun yarn. By optimizing the relaxation behavior, mills can produce a finer and more consistent linen yarn. This optimization directly reduces yarn breakage during the subsequent weaving stage.