Production Metric
Fibre mass recovery percentage defines the mass of long flax line remaining after the removal of short tow and waste during the mechanical combing process. Hackling line yield serves as the primary gauge for measuring the efficiency of the straightening and cleaning equipment within a spinning facility. Process managers calculate this figure by dividing the final weight of the combed long fibre by the total weight of the raw stricks fed into the hackling machine.
This calculation excludes the residual short fibres captured in the dust extraction system or collected as tow for secondary manufacturing uses. The ratio dictates the net output of top-quality sliver available for subsequent drafting stages in the textile line.
Operational Variance
Variations in moisture content within the raw flax supply significantly influence the consistency of these weight measurements across different batches. Humidity levels inside the production hall alter the mass of the fibre during storage and processing, potentially skewing the recorded results if operators fail to apply standard atmospheric corrections. Equipment settings, specifically the spacing between the needles on the hackling pins, determine the intensity of the cleaning action and the resulting loss of material to the tow bin.
Tight pin density cleans the fibre thoroughly but forces a lower output of long line, while wider pin settings increase throughput at the expense of residual impurities. Mill operators monitor the output of every machine shift to ensure the percentage stays within the contractual limits defined by international quality standards for flax processing.
Commercial Impact
Financial settlements between raw material suppliers and spinning mills frequently hinge on the attainment of a specific recovery threshold established in the procurement contract. Disputes arise when the observed output fails to reach the agreed baseline, as the price paid for long line assumes a certain level of conversion efficiency that covers the costs of high-grade fibre production. Discrepancies between mill-side measurements and buyer-side audit checks happen when sampling methods differ or when the drying of fibre during ocean freight changes the original weight parameters.
Traceability records maintain the integrity of these yield statistics by linking the raw strick batch numbers to the resulting sliver weight documented in the internal quality control log. High yield percentages indicate successful fiber processing that maintains raw material value throughout the transformation into yarn.
