FIBRE
MIGRATION IN YARN STRUCTURE
Fibre Migration
Fibre migration occurs during
spinning both in staple and filaments yarns. The effect of migration is more
pronounced in staple yarn than in filament yarn. The outer fibres tend to move
toward center of low tension zone and the centre fibres try to move outside.
This displacement of fibres during spinning is called fibre migration.
According to Textile Institute (UK),
“The change in distance of a fibre or filament from the axis of a yarn during
production is called fibre migration.”
Effects of
Fibre Migration on Yarn Properties
Migration of fibres affects on many
properties of yarn. Mainly it affects yarn strength and elongation. If fibres
migrate more then strength of yarn is increased and yarn elongation will be
reduced.
Factors
affecting on Fibre Migration
The factors or parameters on which
the fibre migration depends on are-
v Fibre staple length (Higher
the fibre staple length higher will be migration)
v Yarn tension (If the yarn
is under tension, the fibres in yarn will migrate more)
v Mode of spinning (In ring
spinning fibre migration is more whereas in rotor yarn, the strength of yarn is
15-20% less than that of ring yarn. So here fibre migration is very less)
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