Different types of fabrics are made from different kinds of raw materials (e.g: Cotton, Silk, Mohair, Kashmere, Viscose,
Lyocell, Polyester, blended etc.). All kinds of fibres belong their own chemical and physical properties. These properties
play a great role in appearance of fabrics.
In Spinning process different fibres bahave in different ways, cause of that technical parameters for machines vary material
to material .
During selection of raw material for spinning, the following properties will be considerable:
Before I explain about the fibre properties, want to clear that all these parameters are explained on the basis of
HVI and only for cotton fibre. Synthetic fibres are illegible and are sold by manufacturers per requested parameters (Length
and Denier / Mic / Tex).
- Micronaire(Mic) - It's the fineness of a single fibre and shows the size of fibre taken in cross-section.
- Fibre Length - Fibre length on a beard of cotton on HVI (High Volume Instrument) and is determined in hundredths
of an inch and equivalent staple length in 32 (Thirty-second) of an inch. This factor direclty effects on yarn strength
and spinning efficiency.
- Length Uniformity - This factor measures the degree of fibre length uniformity in a bundle. Length uniformity
is directly proportional to the yarn strentgh, yarn uniformity and spinning efficiency.
