Cotton Yarn Deformation under the lnfluence of Tensile Force
Abstract
The microscopic method was used for the measurement of the elongation and diameter of combed cotton yarns 20 tex spun from different cotton types: Sudanese cotton »XG5B«, Egyptian cotton Giza 75 FG and Turkish cotton white 1st class. Longitudinal, cross and volume deformation, relaxation and permanent deformation of the yarn after relieving under the influence of tensile stress up to 5.5 cN/tex were investigated (stresses were adjusted to the parameters of the technological process of knit fabrics production). Time influence of tensile force increases elongation, but the yarn diameter and volume are decreased. The dependence of relative deformations on specific stress is linear with the correlation coefficient higher than 0.95. The relative. deformation in the cross direction is greater than deformation in longitudinal direction. A yarn spun from shorter and coarser fibers shows a greater relative deformation in both directions. The rest of relative longitudinal deformation 12 hours after relaxation. is from 1.6.to 2.5 %., whereas the rest of cross deformation is. greater, that is from 7.4 to 10.4 %.Downloads
Published
1992-08-31
How to Cite
[1]
Skenderi, Z., Perić, P. and Orešković, V. 1992. Cotton Yarn Deformation under the lnfluence of Tensile Force. Tekstil. 41, 8 (Aug. 1992), 381–386.
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Section
Original scientific paper
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Copyright (c) 1992 Hrvatski inženjerski savez tekstilaca

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