Physical Separation
Mechanical breaking of dried flax stems separates woody core pieces from long bast fibres during early primary processing in Chinese mills. Operators feed retted straw through fluted metal rollers that fracture the rigid inner shives without cutting the external strands. Industrial teillage yields clean line material intended for high speed wet spinning lines alongside short tow fractions destined for carded yarn production.
Humidity control within the breaking hall prevents static buildup while keeping fibre breakage below tolerated thresholds.
Yield Quality
Production line managers record daily output metrics on the mill transfer docket to monitor raw material degradation rates. Raw straw entering the installation carries natural impurities that affect the final commercial classification assigned before export packing. Laboratory technicians measure residual shive content using standardized gravimetric testing protocols on sampled batches pulled directly from the discharge conveyor.
Higher grade output commands premium pricing across international textile markets because cleanliness directly reduces subsequent processing waste during carding and combing stages.
Grade Differentiation
Technical specifications separate raw bast fractions from finished woven cloth through distinct physical parameters and testing standards. Raw fibre classification depends heavily on tensile strength, length uniformity and freedom from woody residue, whereas completed fabric evaluation measures warp density, tear resistance and dimensional stability. Mill processing protocols establish internal cleanliness targets that often exceed minimum buyer acceptance criteria to secure favorable long term supply contracts.
Commercial disputes usually arise when delivered shipments fail the agreed moisture regain limits or display excessive shive contamination upon arrival at the spinning mill.