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Yarn Testing Introduction

Yarn Testing Introduction 

Yarn testing is the heart portion of the spinning industry.

Management of spinning completely depends on the yarn quality, this can be estimated in the testing Lab.

DSPAT Yarn
Yarn


Spinning lab generally includes testing of fibres as well as yarn, but yarn testing is the spinners' priority.


Apart from the spinning industry, war testing also touch on ginning industry and has significant effects on the weaving and garment industry also.


Spinner testing yarn to maintain their inner process, and quality and fulfil demands of weavers in yarn quality and quantity.


Ginner estimates from fibres about yarn parameters and acts according to the testing report.


Weaver uses yarn testing to check their fabric quality, and strength and understand the properties of that fabric depending on yarn characteristics.


Garment manufacturers also used yarn testing to some extent to analyze costing and decide the types of final garments according to the yarn quality used for producing those garments.


Yarn testing generally includes yarn count, uniformity, hairiness, twist, and strength. From these parameters, the price and quality of yarn are decided.


However, for more research and analysis purposes, frictional properties of abrasion, elongation, moisture effects, and colour variation of yarn were also measured in the testing lab.


In some cases, yarn testing varies with the types of fibres used for the production of yarn. 


I.e. - Various testing for Natural fibre yarn and filament fibre yarn. In the case of natural cotton fibres, Short fibres are higher so that the hairiness value of 100% cotton yarn is a considerable parameter while in the case of manmade filament yarn, the Hairiness value is less important because it does not create higher hairiness.


  • Here, is the table to compare fibre testing and yarn testing in natural as well as manmade fibre.


Natural Fiber Quality Parameters

Natural Yarn quality Parameters

Mean length / Effective length

strength, Evenness, Hairiness

Length Distribution

Evenness, Hairiness

Short fibre content

Evenness, Hairiness, Imperfections

Fineness

Evenness

Fibre strength

strength

Maturity Co-efficient

Neps

Trash %

Imperfection particularly neps trash particles

Seed coats

Neps

Colour

Colour variation within and between lots



Manmade Fiber Quality Parameters

Manmade Yarn quality Parameters

Mean length

Evenness, Hairiness

Fineness

Evenness, Hairiness

Crimp

Evenness, Hairiness

Spin finish

Hairiness

Flushed fibres

Imperfection



Yarn testing includes the following parameters 

  1. Yarn sampling
  2. Yarn count
  3. Yarn Hairiness
  4. Yarn Twist
  5. Yarn evenness
  6. Yarn moisture effect
  7. Yarn friction
  8. Yarn strength

Questions -
  1. Detailed description of yarn testing.
  2. Which fibre testing has an influence on yarn testing in natural fibre? OR compare fibre testing and yarn testing in natural fibre.
  3. Which fibre testing has an influence on yarn testing in man-made fibre? OR compare fibre testing and yarn testing in man-made fibre.
  4. Which parameters are included in yarn testing?

References

Lord, P. R. (2003). Handbook of yarn production: Technology, science and economics (1st ed.). Woodhead Publishing.

NPTEL IITm. (n.d.). Nptel.Ac.In. from https://nptel.ac.in/courses/116102029

Saville, B. P. (1999). Physical testing of textiles. Woodhead Publishing.

Testometric co. Ltd. (n.d.). Testometric.co.uk. from https://www.testometric.co.uk/

Yarn tests. (2019, July 23). ATIRA; Ahmedabad Textile Industry’s Research Association. https://atira.in/yarn-tests/

(N.d.). Textilelearner.net. from https://textilelearner.net/classification-of-textile-testing-fiber-testing-yarn-testing-fabric-testing/

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