Staple Length against Pilling Life in a Combed Cotton Order
Combing long-staple cotton to eighteen percent noil suppresses short fibers below six percent, locking ends into yarn cores to secure Grade 4 pilling life.
Noil Extraction
Combing Process
Yarn preparation requires the removal of short fibres and tangled clusters to prepare the material for fine spinning. The execution of noil extraction happens during the combing phase, where rotating needle cylinders filter out fibres below a specified length limit. This step is critical for producing combed yarns.
Extraction Mechanism
Circular combs strip the short fibres, known as noil, away from the long-staple sliver while it is held by nipper jaws. In any system executing noil extraction, the extraction percentage can be adjusted by altering the distance between the nippers and the detaching rollers. A wider setting removes more short fibres, while a closer setting increases the yield of the sliver.
Yarn Optimization
Removing these short components ensures that the remaining fibres are of uniform length and can align parallel to each other. Combing with precise noil extraction reduces yarn unevenness and minimizes the occurrence of thick or thin places in the final strand. This optimization directly influences the subsequent efficiency of downstream operations by reducing warp breaks under tension.
It also lowers the hairiness of the yarn, which prevents fuzzy fabric surfaces. The resulting yarn has higher strength, which is essential for manufacturing fine, high-density fabrics that require a pristine surface finish.
Byproduct Valuation
Recovered short fibres are collected and sold to other industries for use in non-woven fabrics or coarser yarns. Because these fibres have already been cleaned, they represent a valuable raw material for secondary manufacturing. This secondary market helps offset the high operating costs of the combing room.