Fabric Distortion
Skewed filling yarns deviate from a perpendicular angle relative to the warp threads during textile processing. Woven fabrics exhibit this structural defect when tension imbalances occur across the loom width during weaving or through uneven heat setting in the finishing tenter frame. Finishing plants measure the angular displacement in degrees from the true cross-machine direction to determine whether the material meets buyer tolerances before garment cutting begins.
Alignment Tolerances
Garment manufacturers reject rolled goods exceeding a three percent angular deviation threshold because skewed seams twist downward on finished apparel after laundering. Quality control inspectors lay full-length specimens flat on inspection tables to project a shadow line perpendicular to the selvage edge. Automated optical sensors mounted on tenter entry frames detect the angular offset continuously and signal differential overfeed wheels to apply corrective tension before the cloth enters the drying chambers.
Correction Mechanics
Mechanical straighteners apply differential pressure through curved rolls and photo-electric detection heads to pull distorted filling yarns back into square alignment. Hydraulic cylinders adjust roller angles dynamically based on the optical feedback signal received from the advancing web. Mills calibrate these mechanisms continuously because excessive nip pressure damages delicate filament yarns while insufficient tension leaves the underlying distortion uncorrected.
Commercial Liability
Bulk shipments failing agreed angular limits incur financial penalties or outright rejection at the cut-and-sew facility. Purchasing contracts specify maximum allowable skew percentages to allocate the financial burden of wasted yardage between the textile mill and the apparel assembler. Fabric bow remains a permanent structural flaw when thermal setting locks the distorted geometry into synthetic fibres during high-temperature finishing.
