unit on new spinning systems

8/13/2019 Unit on New Spinning Systems

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Unit-2

1B.TECH TEXTILE TECHNOLOGY 3rd YEAR 1st SEM


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This search began on a broad front at the

end of the 1960s.

The newer spinning systems developed since

then include rotor spinning, air-jet spinning,friction spinning, vortex spinning,

electrostatic spinning, core spinning, wrap

spinning, twistless spinning and others.

3rd YEAR 1st SEM 2B.TECH TEXTILE TECHNOLOGY


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The structures of yarn obtained from thesesystems are also different and vary in manyaspects.

The ring yarns have helical structure andeven twist distribution, but sometimes therecan be problem in ring spun yarn related totwist liveliness and migration of fibres insideyarn.

For improving these aspect new structurescame into picture, which are different fromring spun yarn structure and these structureswill also behave differently in fabric stages



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TWIST DISTRIBUTION IN YARNS FROM DIFFERENT

TECHNOLOGIES


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rotor spinning, electrostatic spinning, air-vortexspinning, friction spinning and disc spinning.



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Open end spinning is also known as break spinning orfree fibre spinning.

In this process the fibrous material is highly draftedto separate out the individual fibres.

The individual fibres are subsequently collected ontothe open end of the yarn.

This is rotated to twist the fibre into the yarnstructure to form a continuous strand of yarn. This iswound onto a bobbin to form the yarn package



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Yarn manufacture using the air jet primarily

produces fascinated yarns using the false

twist principle.

Hence, we discuss about the principle offalse twisting before going into actual air jet

spinning.



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Fig. demonstrates the

principle of operation of

false twisting



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Principle of

Production of

Fasciated Yarn

through False

Twisting.



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15/263rd YEAR 1st SEM 15B.TECH TEXTILE TECHNOLOGY


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Expansion of fibre edges due to

whirling force of the jet air stream

Feed material Passage


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unit on new spinning systems

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