Question

The standard norm for the waste at comber is

• A. 0.5% of short fibre
• B. 2.5 times short fibre
• C. 4.5% of short fibre
• D. based on type of cotton processed

Hint:

• Comber noil percentage varies (e.g., 8-25\%) based on input cotton SFC and desired yarn quality.
• The phrasing "X\% of Y\%" is ambiguous. If interpreted as a factor: Noil\% = (Factor from option) $\times$ (SFC\% value).
• Option (a) implies Noil\% $\approx 0.5 \times$ SFC\%. For 20\% SFC, this gives 10\% noil, which is a practical value.
• Option (d) is true but not a specific quantitative norm.

Answer 1

The Correct Option is A

The standard norm for waste at the comber is derived from understanding the processing characteristics of short fibers in cotton. Combing is a process in textile engineering where short fibers are removed to produce higher quality yarns. The optimal removal percentage ensures quality and efficiency without excessive waste. In this context, the correct option is:

0.5% of short fibre

Here’s how this standard is derived:

• The goal of the combing process is to enhance the quality by eliminating short fibers, while the efficiency is determined by how minimally waste can be extracted, targeting only undesirable short fibers.
• A standard of 0.5% of short fiber provides a balance, accommodating a realistic percentage of fibers that need removal without incurring unnecessary waste.
• This norm is crucial as it considers efficiency while preserving quality, which is necessary for maintaining industry standards and minimizing loss during the yarn production.