Assumptions of an Ideal Yarn Geometry | Properties of Ideal Yarns

What is yarn geometry?
Yarn geometry means, the arrangement, properties and structure of the fibres within the yarn. We know that, molecular properties and fiber structure determines fiber properties, same as yarn structure determines yarn properties, which along with fabric structure determines fabric properties. From yarn geometry easily know about cross-section parameters of yarn. Yarn geometry play an important role in the fabric geometry and some physical properties of fabric such as handle and appearance. In this article I will give ideal properties of yarn, I mean yarn geometry.
Fig: Single, ply and cord yarn (Image courtesy: https://www.britannica.com)
Properties of ideal yarns:
The following yarn properties should have a textile yarn if it is said as a ideal yarn-
  1. The yarn in circular in cross-section and is uniform along its length.
  2. Yarn is composed of concentric layers of different radial.
  3. Each fibre follows a uniform helical path around one of the concentric cylinder so that its distance from yarn axis remains constant.
  4. A fibre at the center will follow a straight line of the axis.
  5. The axis of circular cylinders coir sides with yarn axis.
  6. The number of filaments or fibers crossing the unit area is constant; that is the density of packing. Fibers in the yarn are constant throughout the model.
  7. Every filament in the yarn will have the same amount of twist per unit length.
  8. The yarn consists of very large number of filaments.
If the above mentioned yarn properties is absent on any yarn than the yarn should not be allowed on weaving to make fabric. Because it will not be able to give you a perfect weaving combination where the warp and weft yarn’s parameter is mandatory to be maintained.

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Mazharul Islam Kiron is a textile consultant and researcher on online business promotion. He is working with one European textile machinery company as a country agent. He is also a contributor of Wikipedia.


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