Force Resistance
Maximum tensile force that an individual flax strand can support before rupturing is the primary measure of its inherent material strength. This value, known as the single fiber breaking load, is expressed in centinewtons and represents the baseline capability of the raw stock. Combing mills use this measurement to grade fibres before they are released to the spinning floor.
Laboratory Test
Electronic tensile testers clamp a single isolated fiber between two jaws and gradually increase the tension until failure occurs. This test must be performed under standard atmospheric conditions of temperature and relative humidity because moisture absorbs into the flax and alters its mechanical response. Technicians record the average value from dozens of individual trials to generate a statistically valid report for the batch documentation.
Mill Relevance
Wet spinning operations depend on this individual strength to ensure the continuous flow of the sliver through the hot water drafting bath. If the single fiber breaking load is below the acceptable threshold, the drafting tension will cause frequent yarn breaks and increase machine downtime. Spinning managers consult these test reports to adjust the draft ratio and ensure that the finished yarn meets the strict tension standards required for modern high-speed looms.
This preventive adjustment avoids the production of weak yarn that would be rejected during incoming inspection at the fabric mill.
