This account provides information about the cause of relaxation shrinkage in worsted yams, and in particular it examines the contribution which cohesive set in single fibers makes to yarn shrinkage.
It is shown that yam shrinkage can be a significant factor in the relaxation shrinkage exhibited by both woven and knitted fabrics. It can give rise to such problems as "bubbling" in checks and variability of dimensions of knitteds. There is also good evidence to show that yam shrinkage can be the cause of fabric expansion during washing.
The conditions which should be used for measurement of yam shrinkage are discussed, and it appears that a tension of 0.2 gf/tex is appropriate in many cases.
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References
1.
Baird, K., Prevention of Bubbling in Wool Check Fabrics, J. Textile Inst.66, 21-27 (1975).
2.
Baird, K. and Foulds, R.A., Felting Shrinkage of Plain-Knitted Wool Fabrics, Textile Res. J.40, 628-636 (1970).
3.
Baumann, A.B. and Baird, K., Laboratory Apparatus for Stretching Textile Yarns, Testile Inst. & Industry12, 334 (1974).
4.
Denby, E. F., Private communication.
5.
Feughelman, M., Creep of Wool Fibers in Water, J. Textile Inst.45, T630-T641 ( 1954).
6.
Feughelman, M. and Robinson, M.S., Relationship Between aome Mechanical Properties of Single Wool Fibers and Relative Humidity, Textile Res. J.37, 441 (1967).
7.
Hickie, T.S. and Chainkin, M., Some Aspects of Worsted-Yarn Structure. Part I: The Single-Fiber Mechanical State in Yarns Produced on High-Draft Spinning Systems, J. Textilr Inst. 65, 421 (1974).
8.
Ingham, J. and Lawes, J., The Effects of Storage on Wool Products, Wool Sci. Rev. No. 40, 2, (1971 ).
9.
Rigby, B.J., Mitchell, T.W., and Robinson, M.S., Changes with Time in Mechanical Properties of Wool Fibers, J. Macromol. Sci. (Phys.) B10, 255-269 (1974).
10.
Sabour, H.I. and Townend, P.P., Effect of Drawing and Spinning Systems on Shrinkage in Worsted Yams, Textile Rec. 81, (963) 66-69 (1963).
11.
Stein, H. and van der Weyden, H., Effect of Tensile Stress on the Tensile Strength, Elongation, and Shrink Properties of Woolen Yams, Z. des. Textile Ind.65, 29-36 (1963).
