Why fibre length?
Quality assessment, Fibre breakage study, machine settings, combing efficiency, etc.
The length of staple fibre is one of the most important characteristics. In general, a longer average fibre length is to be preferred because it confers a number of advantages. Firstly, longer fibres are easier to process. Secondly, more even yarns can be produced from them because there are fewer fibre ends in a given length of yarn. Thirdly, a higher strength yarn can be produced from them for the same level of twist.
The length and fineness are sometimes related in natural fibres whereas, for man-made fibres, length and fineness can be controlled separately.
The cut length of man-made fibres is often influenced by the fibre length of natural fibres.
The measurement of natural fibres is a task as there is a greater variation in the length of different types of the same material and even within the same type.
The properties of cotton fibre vary
for different varieties of cotton.
for different growth areas.
for different climatic conditions.
from year to year.