Tensile Limit
Mechanical properties define the capacity of a wet thread to resist breaking under longitudinal tension during the spinning process. This parameter, referred to as wet tensile strength, is highly dependent on the cohesive forces between wet fibres and the amount of twist inserted. High values prevent yarn breakages on the ring frame and the winding machine, ensuring continuous operation.
Spinning Behavior
Moisture absorption increases the alignment and hydrogen bonding of cellulose molecules, making flax fibers stronger when wet than when dry. This characteristic is unique to linen and allows it to endure the high tensions of wet spinning and subsequent high-speed weaving processes. If the strength of the wet thread is insufficient, frequent breaks will occur in the drafting zone, which reduces overall mill efficiency and increases waste.
Consequently, the fiber preparation stages must ensure that the natural waxes are not over-extracted, preserving the fiber’s inherent structural integrity.
Testing Standard
Laboratory personnel measure this property using specialized tensile testers equipped with water baths to maintain the wet state of the yarn during evaluation. The results are recorded in centinewtons per tex to provide a standardized measure of performance. This evaluation is critical for validating the quality of export-grade yarns before they leave the spinning mill.
