Yarn Its number - from fabric

Yarn Number - Fabric
Yarn Number - Fabric

Yarn, which is the main raw material for fabric production in textile, is ready for use after passing through certain stages such as cleaning, paralleling, drawing and thinning up to desired length, imparting durability by twisting and winding on bobbins. The fineness or thickness of the yarns is effective at many points, from the strength of the fabric to the smooth surface. Meanwhile, the working parts of the machines that will weave the fabric vary according to whether the yarn is thin or thick. Therefore, numbering is an important process in yarns.

Two easy to measure features are used to determine the yarn fineness. The first is the weight numbering system and the other is the length numbering system.

In the weighting numbering system, the yarn number is expressed as the weight corresponding to the unit length. This system is also called direct numbering system. The numbering system on the basis of length is called indirect numbering system. In this system, the yarn count is expressed in lengths per unit weight.

In order to determine the numbers of weft and warp yarns used in the production of woven fabrics, these yarns must first be removed from a fabric of a certain size. The yarn counts are then calculated separately for warp yarns and weft yarns.

For physical tests performed in accredited laboratories, standards issued by local and foreign organizations are complied with. In determining the yarn count (from the fabric), the following standards are used:

  • TS 255 Woven fabrics - Production style - Analysis methods - Determination of linear density of yarn extracted from fabric
  • ISO 7211-5 Textile - Woven fabrics - Production - Analysis methods - Part 5: Determination of linear density of yarn extracted from fabric
  • ASTM D1059 Standard test method for yarn count based on short distance samples

All laboratories must have a strong technological infrastructure and an experienced and trained staff in order to provide fast, high quality and reliable results to the enterprises.