What is yarn
Conditioning?
Yarn conditioning is a process of increasing
performance of yarn such as strength, serviceability, luster, handle during the
weaving process.
In various operation in spinning like opening, carding,
drawing and spinning yarn lost moisture content in the fiber. Conditioning provide moisture again in fiber.
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| Yarn Conditioning |
Relative humidity and
temperature will decide the amount of moisture in the atmosphere. High relative
humidity in different departments of spinning is not desirable. It will
result in major problems. But on the other hand, a high degree of
moisture improves the physical properties of yarn. Moreover it helps the yarn
to attain the standard moisture regain value of the fibre. Yarns sold with
lower moisture content than the standard value will result in monetary loss. Therefore
the aim of Conditioning is to provide an economical device for supplying
the necessary moisture in a short time, in order to achieve a lasting
improvement in quality.
The relative humidity in
turn affects the properties of the fibre via the moisture content of the cotton
fibre. The fibre strength and elasticity increase proportionately with the
increase in humidity. If the water content of the cotton fibre is increased the
fibre is able to swell, resulting in increased fibre to fibre friction in
the twisted yarn structure. This positive alteration in the properties of the
fibre will again have a positive effect on the strength and elasticity of the
yarn.
The absence of Vacuum in
conventional conditioning chambers prevents homogeneous penetration. The outer
layers of the package are also too moist and the transition from moist to dry
yarn gives rise to substantial variations in downstream processing of the package,
both with regard to friction data and strength.
Benefits Achieved out of Conditioning for Knitting:
The treatment temperature for knitting yarn is held below
the melting point of the wax. Temperatures for unwaxed yarn are coordinated to
the compatibility fo each individual type of yarn Upto 20% greater efficiency
due to a reduction in the unwinding tension fewer needle breaks uniform
moisture content and friction values regular stitch formation no change in size
of finished articles no extra dampening required free from electrostatic less
fly hence less problems. It helps if the yarn is running on a closer gauge
machines NOTE: Please note that the wax applied should be able to withstand min
60 degree centigrade. If low quality wax is used, it will result in major
problem. Conditioning should be done at 55 to 60 degree centigrade.
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