Continuous Dyeing Tension Dynamics in Jammed Greige Fabric Architecture
Continuous dyeing of jammed greige fabrics requires web draft below 0.5 percent to prevent capillary collapse and preserve liquor penetration across yarn cores.
Weft Bowing Distortion
Structural Defect
A curvature of the weft yarns across the width of a woven fabric causes visual and structural asymmetry in finished garments. This weft bowing distortion occurs during continuous wet processing when the center of the fabric travels faster or slower than the edges. This distortion affects both the appearance and the dimensional stability of the finished textile roll, making it a critical checkpoint in quality control.
Process Cause
Friction between the fabric and the guide rollers or the action of the drying air can cause the center of the web to advance ahead of the selvages. When the fabric is held tightly at the edges by the stenter pins, the center is free to bow forward. This creates a curved pattern in the weft yarns.
Consequence
Severe bowing causes patterns to curve, making it impossible to align the fabric panels during cutting. This issue results in wasted material or rejected garments.
Correction Method
Continuous weft straighteners use optical sensors to detect the curve of the weft yarns and adjust the angle of specialized straightening rolls. These straightening systems apply more tension to the areas that are lagging behind to bring the weft yarns back into alignment.