Comber Noil and Waste Management
topic
Comber noil (12–25% of comber feed) consists of short fibres (mean length 12–18 mm), neps, and trash. Noil value: $0.30–0.80/kg (vs $1.50–3.00/kg for raw cotton), sold for nonwoven wadding, recycled yarn, or cotton wool production. Blow room and card waste: 2–5% of raw material weight, containing trash, short fibres, and fly; sold at $0.05–0.20/kg. Total preparation waste value recovery: $50,000–500,000/year for a 50,000-spindle mill depending on processing intensity.
Role
Waste management in fibre preparation is a significant cost and sustainability variable. Noil percentage is a direct function of combing intensity, which is a process engineering decision. Understanding the cost trade-off between over-combing (more waste, better quality, higher noil disposal income vs higher raw material cost) and under-combing (less waste, lower quality, potential customer rejections) is a practical mill economics skill.