Fiber Assembly
The multi-cellular bundles of flax found in the bark of the plant stem comprise the primary load-bearing structures used in industrial yarn production. These technical bast fibers are composed of multiple individual elementary fibers held together by natural pectin and lignin. Processing in the mill aims to split these bundles to the optimal degree for the target yarn count, as excessive splitting reduces fiber length while insufficient splitting limits yarn fineness.
Extraction Output
The harvesting, retting, and scutching processes isolate the fiber bundles from the wooden stem. The resulting technical bast fibers are graded by length, color, and cleanliness before being sent to the combed sliver production lines. Spinners evaluate the fiber bundles for their splitting potential, which determines how easily they can be refined during wet spinning.
Quality Standard
Contract specifications for raw flax shipments define the allowable bundle dimensions to ensure processing consistency. If the technical bast fibers are too coarse or poorly retted, they will not draft evenly and will cause high yarn irregularity. Buyers test sample lots for tensile strength and bundle linear density to confirm that the fiber grade matches the requirements for the spinning run.
This documentation is crucial for maintaining yarn uniformity and preventing breakdowns on high-speed weaving looms. Spun linen yarns must meet these material criteria to pass export inspections.
