Identifying Primary Causes of Warp Streaks in Woven Fabrics
Warp streaks stem from localized end-spacing variations, tension differentials during beaming, linear density fluctuations, or unequal sizing penetration.
Dropped Warp Ends
Yarn Defect
Structural yarn defects that arise during weaving when single warp threads snap and fail to weave into the fabric must be resolved before further processing. The occurrence of dropped warp ends results in empty spaces along the length of the linen cloth, which reduces the density and strength of the woven sheet. This structural flaw must be repaired by skilled menders using matching flax yarns after the roll is taken off the loom.
Weaving Impact
Fine linen yarns are highly prone to breakage under the high mechanical tension of modern shuttleless looms. If the warp stop motion fails to detect a break immediately, the severed thread, known as dropped warp ends, will wind around the beam or float loosely in the shed. This creates an irregular weave pattern and can cause adjacent warp threads to tangle, which eventually forces an emergency shutdown of the loom and increases waste.
Inspection Protocol
Quality inspectors at the grey cloth inspection table trace each missing thread back to its source to ensure the loom has been corrected. They mark the affected areas with plastic pins or colored strings to guide the subsequent repair process. This ensures that only fully corrected rolls proceed to the bleaching and dyeing departments.