February 26, 2010

TX 141 YARN QUALITY ANALYSIS


ANNA UNIVERSITY :: CHENNAI – 600 025.
M.TECH. TEXTILE TECHNOLOGY
TX 141 YARN QUALITY ANALYSIS

  1. MASS VARIATION 7

Depiction of mass variation of textile strands in time and frequency domains; Interpretation and significance of U% and CV% for textile strands; Classification and analysis of yarn faults created by mass variations; theoretical limit for strand regularity and index of irregularity.

  1. VARIANCE – LENGTH CURVES 8

Effect of specimen length and total length on mass variation measurements of textile strands; analysis of variance-length curves to understand and avoid the introduction of mass variation during the spinning operations.

  1. SPECTROGRAM 12

Determination of periodic mass variations of textile strands in the form of spectrogram; determination of theoretical wavelength spectrum; comparison between normal spectrum and ideal spectrum; type of faults and their representation in spectrogram; interpretation of superimposed waves in spectrogram; wavelength range for each machine in a spinning mill.

  1. TENSILE PROPERTIES 10

Influence of specimen length on yarn tensile properties; measurement and application of yarn modulus; creep and stress relaxation; effect of testing speed on yarn tensile properties; significance of estimating minimum yarn strength.

  1. INFLUENCE OF YARN QUALITY 8

Effect of yarn properties like evenness, strength, elongation, modulus, hairiness, abrasion resistance, fibre and yarn mix-up and yarn tension history on the performance of yarn during winding, warping, weaving and knitting; effect of yarn quality on fabric wear, appearance and comfort properties.

TOTAL : 45

REFERENCES

  • R.Furter, Evenness testing in yarn production: Part I, The Textile Institute, Manchester, 1982.
  • R.Furter, Evenness testing in yarn production: Part II, The Textile Institute, Manchester, 1982.
  • R.Furter, Strength and elongation testing of single and ply yarns, The Textile Institute, Manchester, 1985.
  • Steadman, R.G, ‘Cotton testing’, Text.Prog, Vol. 27, No.1.Text.Inst, 1997, ISBN:1870812859.
  • P.R.Lord and Grover G, ‘Roller drafting’, Textile Prog, Vol. 23 No.4, Text.Inst, 1993, ISBN:1870812468.
  • Instrumentation in the textile industry, Vol. 1; 1996. Instrument Society of America, 1997, ISBN:1556175973.

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