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S-twist
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S- and Z-twist yarns
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S-twist

yarn and rope manufacturing
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S- and Z-twist yarns
S- and Z-twist yarns (Left) S- and (right) Z-twist yarns.

In yarn and rope manufacturing, S-twist refers to a direction of twist where the fibers or yarns spiral upward to the left, resembling the central portion of the letter 'S'. This process binds fibers or yarns together to create a continuous strand.123

The direction and amount of twist significantly impact the yarn's properties and the resulting fabric's appearance and durability. Yarns with less twist are used for softer fabrics, while those with more twist create smoother surfaces. In rope construction, alternate stages are twisted in opposite directions to ensure torsional stability.132

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4 Britannica Sources
  1. twisting
  2. rope
  3. S-twist
  4. textile - Modern spinning

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