Foreign Fibre Detection at Winding Stage
topic
Foreign fibre detection at winding uses polarised light, dual-wavelength optical, or hyperspectral imaging sensors to identify differently reflective or coloured fibres within the yarn body that would cause visible specks in white and pale dyed fabric, with detection triggering automatic cutting and removal of the contaminated yarn segment before splicing, with polypropylene, polyester, and coloured cotton fibres being the most problematic contaminants in cotton warp yarn production.
Role
Prevents the propagation of fibre contamination from spinning packages into warp beams where it would produce persistent fabric defects that cannot be removed after weaving, with foreign fibre detection at winding being the last practical intervention point for removing contamination before it is incorporated into the warp beam structure where detection becomes impossible and fabric-level rejection of contaminated rolls is the only remaining remediation option.