Structural Flaw
Structural flaws occur when synthetic fragments from packaging materials contaminate natural fiber yarns or fabrics. A polypropylene defect appears as a non-dyeable streak or a physical lump in the finished textile. These impurities usually originate from the bags used to transport raw cotton or the twine used for baling.
Dyeing Behavior
Chemical resistance of the plastic prevents it from accepting the dyes used for cellulose or protein fibers. When the fabric leaves the dye bath, the contaminant remains its original color or stays white. A polypropylene defect appears as a non-dyeable streak or a physical lump in the finished textile.
These impurities usually originate from the bags used to transport raw cotton.
Detection Challenge
Inspection systems struggle to find these thin, translucent fibers before they are woven into the structure. Once embedded, the plastic can only be removed manually or by cutting out the affected section of the cloth. Prevention focuses on the use of paper or cotton packaging at the ginning and baling stages.
Economic Impact
Remediation of contaminated batches involves substantial labor costs and material waste. Brands often set strict limits on the number of such flaws allowed per thousand meters of fabric. Consistent quality depends on a clean supply chain from the farm to the spinning mill.
