Determining Flax Staple Profile Using Manual Comb Sorting
Manual comb sorting by ISO 2370 isolates technical flax bundle length profiles to prevent drafting waves, control short fibre content, and enforce purchase contracts.
Length Dispersion CV
Fibre Distribution
Statistical variance measurements define the consistency of raw material lengths within a textile lot. The length dispersion cv provides a numerical value representing the coefficient of variation in millimetre measurements across a flax population. It is calculated by dividing the standard deviation of the length by the mean.
This value helps mill managers predict the volume of short fibres that will be removed during the hackling stage.
Process Efficiency
High variation in fibre length leads to increased waste and frequent breakages on the spinning frame. An elevated length dispersion cv suggests that the scutching process was aggressive or the raw flax was brittle. Machines must be adjusted to accommodate the shortest fibres, which often reduces the overall speed of the line.
Precise settings on the comb are necessary to maintain yield. Operators must monitor these levels to avoid a sudden drop in yarn quality. Frequent adjustments increase the downtime of the mill.
Spinnability Factor
Uniformity in the raw material allows for the production of finer yarns with fewer imperfections. When the length dispersion cv remains low, the drafting rollers can maintain better control over the individual fibres. This stability ensures that the twist is distributed evenly along the length of the yarn.
Consistency in fibre length remains the primary driver of high quality linen output.