Tensile Measure
The mechanical property known as centinewtons per tex defines specific tenacity by dividing breaking force in centinewtons by linear density in tex. Chinese flax spinning mills record this metric on laboratory test certificates to verify single yarn strength before the material proceeds from the winding department to the loom beam. Flax fibre grades depend primarily on natural fineness and length distribution, whereas woven cloth grades rely on warp and weft density combined with surface regularity.
Mill acceptance standards differ from buyer acceptance criteria because internal production targets focus on reducing end breakage rates during high-speed processing, while commercial contracts penalize deliveries falling below agreed breaking length thresholds.
Breaking Force
Mechanical testing instruments pull conditioned yarn specimens at a constant rate of extension until rupture occurs, registering the peak force required to break the strand. Operators mount short lengths of single yarn between pneumatic clamps inside a controlled atmospheric chamber maintained at standard relative humidity and temperature. Force transducers measure resistance continuously while optical sensors monitor elongation parameters until the specimen fails completely.
Tension values recorded during this destructive procedure determine whether the spinning lot meets structural prerequisites for subsequent sizing and high-tension weaving operations.
Tenacity Limit
Evaluating yarn strength per unit mass prevents heavier yarns from appearing artificially superior simply due to their bulk. Normalizing breaking load against linear density allows technicians to compare fine wet-spun linen yarns with coarser dry-spun counterparts on a direct numerical basis. Tensile values drop sharply if retting has degraded the primary cell walls of the raw flax stem before mechanical decortication takes place.
This specific tenacity ratio establishes the maximum mechanical stress a yarn strand withstands before failure during aggressive mechanical shedding on modern shuttleless looms.
