TX4202 Yarn Quality Analysis Syllabus:
TX4202 Yarn Quality Analysis Syllabus – Anna University PG Syllabus Regulation 2021
OBJECTIVES
To make the students to
Understand different characteristics of yarns
Understand testing of yarn
Analyze the various reports generated during quality evaluation of yarns and
Interpret the results obtained through these reports for process and quality control.
UNIT I MASS VARIATION OF TEXTILE STRANDS
Depiction of mass variation of textile strands in time and frequency domain; interpretation and significance of U% and CV% for textile strands; irregularity index.
UNIT II VARIANCE LENGTH CURVE
Effect of specimen length and total length on mass variation measurements of textile strands; theory of construction of VL curve; analysis of variance length curves to understand and avoid the introduction of mass variation during the spinning operation
UNIT III SPECTROGRAM
Determination of periodic mass variation in the form of spectrogram; determination of theoretical wave length from spectrum; comparison between normal and ideal spectrum; type of faults and their representation in spectrogram; interpretation of superimposed waves in spectrogram
UNIT IV TENSILE PROPERTIES
Influence of testing factors on yarn tensile properties; measurement and application of yarn modulus; creep and stress relaxation of yarn; significance of estimating minimum yarn strength
UNIT V YARN DEFECTS
Classification and analysis of yarn faults created by mass variation, their causes and remedies; yarn faults in fabrics – causes and remedies ; Hairiness of yarns
TOTAL : 30 PERIODS
LABORATORY:
Measurement and analysis of
1. U% of sliver, roving and yarn
2. Imperfections and hairiness of yarn
3. Tensile properties
4. Creep and stress relaxation
5. Yarn fatigue
6. Variance-length curve
7. Spectrogram
8. Yarn faults
TOTAL : 30 PERIODS
OUTCOME:
On completion of this course, the students can
CO1: Understand different methods of depicting mass variation of strand
CO2: Analyze and interpret VL curve
CO3: Analyze and interpret spectrogram in finding faulty machine elements
CO4: Analyze the tensile values of strand
CO5: Analyze classified faults and other faults present in the yarn and apply knowledge in reducing yarn faults
REFERENCES
1. Kothari V.K., “Progress in Textiles: Science & Technology Vol. 1, Testing and Quality Management”, IAFL Publications, New Delhi, 1999, ISBN: 81-s901033-0-X.
2. Furter R.,“Strength and elongation testing of single and ply yarns”, The Textile Institute, Manchester, 1985.
3. Furter R., “Evenness testing in yarn production: Part I”, The Textile Institute, Manchester, 1982.
4. Furter R., “Evenness testing in yarn production: Part II”, The Textile Institute, Manchester, 1982.
5. Steadman R.G.,“Cotton testing”, Textile Progress, Vol. 27, No.1.Text.Inst., 1997, ISBN:1870812859.
6. “Instrumentation in the textile industry”, Vol. 1; 1996, Instrument Society of America,1997, ISBN:1556175973.
7. Lord P.R. and Grover G., “Roller drafting”, Textile Progress, Vol. 23 No.4, Textile Institute, 1993, ISBN:1870812468.