A detailed study is made of the effects of yarn size and twist on fiber migration in staple yarns. A simple theoretical model is developed to calculate migration force in a surface fiber as a function of yarn size, twist and processing tension. The theoretical model proved useful, not only in explaining the experimental results, but also in providing some unex pected additional information. In particular, it demonstrates that some scatter of data in experimental results can be expected theoretically. Among all the variables considered thus far in this series of papers [1, 2], yarn size and twist appear to be the most influential variables controlling fiber migration in staple yarns.
Gupta, B.S., FiberMigration in Staple Yarns. Part II: The Geometric Mechanism of Fiber Migration and the Influence of the Roving and Drafting Variables, Textile Res. J.40, 15-24 (1970).
2.
Gupta, B.S. and Hamby, D.S., FiberMigration in Staple Yarns. Part I: Mean Fiber Position as a Controlling Factor and the Influence of Spindle Speed and Spinning Tension, Textile Res. J.39, 55-69 (1969).
3.
Hearle, J.W.S. , TheMechanics of Twisted Yarns: The Influence of Transverse Forces on Tensile Behavior, J. Textile Inst.49, T389-T408 (1958).
4.
Hearle, J.W.S. and Bose, O.N., Migration of Fibers in Yarns. Part II: A Geometrical Explanation of Migration, Textile Res. J.35, 693-699 (1965).
5.
Hearle, J.W.S. and Gupta, B.S., Migration of Fibers in Yarns. Part III: A Study of Migration in Staple-Fiber Rayon Yarn. Textile Res. J.35, 788-795 (1965).
6.
Hearle, J.W.S. and Gupta, B.S., Migration of Fibers in Yarns. Part IV: A Study of Migration in a Continuous-Filament Yarn. Textile Res. J.35, 885-889 (1965).
7.
Hearle, J.W.S. , Gupta, B.S., and Goswami, B.C., Migration of Fibers in Yarns. Part V: The Combination of Mechanisms of Migration, Textile Res. J.35, 972-978 (1965).
8.
Hearle, J.W.S. and Merchant, V.B., Interchange of Position Among the Components of a Seven-Ply Structure: Mechanism of Migration, J. Textile Inst.53, T537-T552 (1962).
9.
Iyer, B.K. and Phatarfod, R.M., SomeAspects of Yarn Structure , J. Textile Inst.56, T225-T247 ( 1965).
10.
Morris, G.J. , ThermalProperties of Textile Materials, J. Textile Inst.44, T 449-T 476 (1953).
11.
Morton, W.E. , TheArrangement of Fiber in Single Yarns. Textile Res. J.26, 325-331 (1956).
12.
Morton, W.E. , and Hearle, J.W.S., Yarn Contraction Due to Twist, J. Textile Inst.48, T 159-T 162 (1957).
13.
Rees, W.H., TheTransmission of Heat Through Textile Fabrics, J. Textile Inst.32, T 149-T 165 ( 1941).
