February 26, 2010

TX 031 THEORY OF YARN SPINNING


ANNA UNIVERSITY :: CHENNAI – 600 025.
M.TECH. TEXTILE TECHNOLOGY
TX 031 THEORY OF YARN SPINNING

  1. FIBRE DISPERSION 8

Ginning of cotton; the necessity of fibre-individualization; fibre opening in blow-room machinery; the mechanism of fibre-dispersion during carding operation; the minimum requirements during carding and the new approaches to improve fibre-dispersion in carding operation. Neps formation and theory of hook formation.

  1. ATTENUATION 9

Principle of roller drafting and its application in yarn production; drafting irregularities – their causes and remedies; the function of aprons in roller drafting; limitation of apron-drafting and the scope for improvement; mechanism of wire-point drafting and its application in yarn production; merits and demerits of wire-point drafting; comparison of wire-point drafting with roller drafting.

  1. TWISTING 8

Effect of twisting of staple-fibre strand on its strength; meaning of twist multiplier and the basis of selection of required twist; fundamental requirement to create real twist in a strand; mechanism of different twisting principles – ring-twisting, open-end twisting, air-jet twisting, up-twisting, two-for-one twisting, hollow-spindle twisting.

4. FIBRE BLENDING 5
Importance of fibre-mix homogeneity on yarn quality; types of mixing during spinning preparatory process; assessment of blend efficiency.

  1. LEVELLING 5

Influence of intermediate product uniformity on yarn uniformity; methods of leveling adopted during spinning processes.

  1. FIBRE CLEANING 5

Methods adopted to clean the fibres from trash, short fibres and neps; role of blow-room, card and comber in fibre cleaning.

  1. FIBRE STRAIGHTENING 5

Definition of fibre-extent; influence of fibre-extent on yarn quality; improvement of fibre-extent by straightening actions in carding, drafting and combing.

TOTAL : 45

REFERENCES:

    • Oxtoby E, Spun Yarn Technology, Butterworths, London, 1987.
    • Klein W, The Technology of Short-staple Spinning, The Textile Institute, Manchester, 1998. ISBN: 1870812980.
    • Klein W, A Practical Guide to Opening and Carding, The Textile Institute, Manchester, 1999. ISBN: 1870812999.
    • Klein W, A Practical Guide to Combing, Drawing and the Roving Frame, The Textile Institute, Manchester, 1999. ISBN: 1870372287.
    • Klein W, A Practical Guide to Ring Spinning, The Textile Institute, Manchester, 1999. ISBN: 1870372298.
    • Lord P.R., Yarn Production: Science, Technology and Economics, The Textile Institute, Manchester, 1999. ISBN: 1870372174.
    • Salhotra K.R. and Chattopadhyay R., Book of papers on Blow-room, Card, Indian Institute of Technology, Delhi, 1998.
    • Shaw J., Short-staple Ring Spinning, Textile Progress, The Textile Institute, Manchester, 1982.
    • Doraiswamy I., Chellamani P., and Pavendhan A., Cotton Ginning, Textile Progress, Vol. 24, No.2, The Textile Institute, Manchester, 1993. ISBN: 1870812484.
    • Grosberg P. and Iyre C, ‘Yarn Production: Theoretical Aspects’, Text.Inst, 1999, ISBN: 1870372034.

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