Standard Laboratory Methods for Flax Yarn Linear Density Determination
Standard flax yarn linear density determination mandates motorized skein reeling under 0.5 cN/tex tension combined with ISO 6741 oven-dry commercial mass correction.
Beam Filling
Warp Geometry
Winding parallel flax yarns onto a flanged cylindrical bobbin under uniform tension constitutes a foundational preparatory operation in linen weaving. Proper beam filling requires exact spatial alignment of hundreds of individual threads across the full width of the loom beam. When wet-spun or dry-spun flax yarn is wound onto the sectional warping beam, subtle variations in linear density cause irregular packing across the barrel cylinder.
Mill technicians record circumferential measurements and flange clearance figures on the warping lot ticket to verify profile consistency before transfer to the sizing machine.
Density Control
Flax fibres possess low elongation properties that amplify tension anomalies during high-speed winding. Inconsistent beam filling produces localized hard spots where yarn layers press excessively against underlying wraps. Presser rolls regulate package hardness by applying continuous hydraulic force against the rotating yarn mass.
Uneven density creates slack selvages during slasher sizing, which alters liquid pickup rates across the yarn sheet.
Weaving Impact
Defects established during warp preparation persist through the loom shed and distort finished cloth structure. Faulty beam filling leads to uneven tension during shed opening, causing end breaks in plain weave fabric. Mills enforce precise flange distance tolerances on the beam card to meet buyer specifications.