Fibre Classification
Flax of short staple designates vegetable bast fibre that measures below thirty-five millimeters in length after initial scutching or mechanical extraction. This specific material arises from broken or irregular stalks that fail to produce continuous line fibres suitable for high-tension wet spinning. Mills designate these leftovers as tow which undergoes separate combing stages to clear away residual woody particles.
The classification ensures that spinning operations adjust draft ratios to accommodate the reduced physical length of the filaments before they enter the carding machinery.
Production Parameter
Mechanical carding transforms short staple flax into a sliver that feeds into dry spinning frames designed for coarser yarn counts. The process relies on heavy rollers to overlap the segments because the individual fibres lack the required length for controlled friction drafting. Quality control departments monitor the sliver regularity during this stage by measuring the variance in mass per unit of length across the delivery apron.
Such data occupies a central position within the mill production record that tracks yield efficiency against the raw fibre input.
Acceptance Boundary
Technical specifications for commercial procurement differentiate short staple flax from scutched line flax based on the failure to reach minimal threshold lengths required for premium spinning protocols. Buyers verify the average fibre length using a comb sorter or optical scanner to ensure the consistency of the delivered batch against the mill purchase agreement. Grading criteria focus on cleanliness and the percentage of woody shive remaining within the mass because excessive impurity reduces the tensile strength of the finished yarn.
Small variations in staple length impact the spinning speed because machines require different roller settings to maintain the integrity of the output. Higher contamination levels lower the market price because they necessitate intensive extra cleaning cycles that generate significant waste. The commercial value of this fibre grade depends solely on the ability of the spinning equipment to produce a stable yarn from these fragmented segments without excessive breakage.
