Wet Spun Linen Warp Tensile Strength and Single End Breakage
Wet spun linen warp breaking strength depends on low strength CV and elastic sizing film to resist cyclic shed tension and prevent single end loom stops.
Single End Test ISO 2062
Standard Methodology
International standardized testing protocols define physical property evaluation procedures for individual spun yarns prior to fabric assembly. The single end test iso 2062 specifies constant-rate-of-extension tensile testing parameters to measure breaking force and elongation at break of single yarn specimens. In linen testing, conditioning specimens under standard atmospheric conditions of twenty degrees Celsius and sixty-five percent relative humidity is mandatory because moisture content strongly influences flax strength.
Laboratory test reports cite peak tenacity values in centinewtons per tex along with elongation percentages across multiple specimen runs.
Laboratory Execution
Automated tensile testers clamp individual yarn strands between pneumatic jaws set at specified gauge lengths, extending the specimen until fracture occurs. The testing equipment records force-elongation curves, capturing breaking strength along with work-to-break values. Wet-spun flax yarns display steep force curves with low breaking elongation, demonstrating the crystalline structure of natural cellulose bundles.
Testing protocols require twenty to fifty individual yarn breaks per sample lot to establish statistically valid mean values and coefficients of variation for yarn strength.
Verification Criterion
Commercial sales contracts for flax yarn incorporate breaking strength thresholds established under ISO 2062 as primary acceptance criteria. Bales failing to meet specified tensile minimums are rejected or re-routed to lower-speed rapier looms to avoid excessive warp breakage.