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23 Feb 2008 03:22:19 | http://bala.bravehost.com
Compact Spinning Protruding fibres from the body of yarn, known
as hairiness, is a characteristic feature of staple fibre yarns.
This gives the yarns and fabrics made from them a softer and
comfortable feel. At the same time, hairiness has some
undesirable effects as pointed below 1.Full ralisation of
strength of fibres is not realised as part of the fibres are not
integrated in the yarn 2.Rough feel is given to yarns
3.Variation in hairniess is a source of weft bars and warp way
streaks in fabric. 4.Long protruding hairs from yarn contribute
to multiple breaks in weaving and fabric faults like stitches
and floats. Compact spinning is designed to reduce hairiness in
yarn. In traditional spinning fibres in the selvedge of strand
emerging from front roller nip do not get fully integrated into
yarn because of restriction to twist flow by the spinning
triangle. These fibres therefore show up partly as protruding
hairs or wild fibres. To overcome this effect, the spinning
triangle is nearly eliminated in compact spinning by
incorporating a condensing zone after main drafting zone. The
condensing zone has a revolving perforated apron with suction
underneath. The fibres are collected on the perforated track and
thus get condensed. The width of strand under front roller nip
is substantially reduced and this enables twist to flow right up
to nip. As a result hairiness is substantially reduced. Compact
spinning systems are offered by Rieter(Comforspin),
Suessen(Elite) and ITV-Zinser among others. Benefits claimed
from comfort spinning are 1.15-20% reduction in hairiness of
yarn, the reduction being more pronounced in long length hairs
2.10-15% improvement in yarn tenacity 3.Twist in yarn can be
reduced by 10% while maintaining same yarn strength 4.Better
evennes of diameter and hairiness. 5.Better abrasion resistance
of yarn leading to less end breaks in weaving. 6.Loom shed
droppings and linting in knitting are reduced 7.Size% can be
reduced by 30-50% 8.Singeing can be omitted 9.Reduced pilling
and better dye uptake in fabric
About Author :
Qualifications:B.Sc., B.Sc.(Tech),M.sc., Ph.D., A.T.I., F.T.I.,
Honorary FTI Experience: Over 45 years experience in R&D and
Technical consultancy to Textile mills and Nonwoven units.
Retired as Joint Director of BTRA.Consultant to mills, Conducts
Inhouse Refresher courses, Visiting professor of Textile
Colleges . Has a web site 1.http://b
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