What are the effect of combing on yarn quality?

Combing, therefore, makes possible the spinning of yarns of fine counts with low irregularities and a clear appearance, combing also results in stronger, smoother and more lustrous yarns. In the overall spinning process, combing operation serves to improve raw material quality by removing noil.

What is the purpose of the combing process?

COMBING PROCESS ( A SPINNING PROCESS): “ The combing is a process which eliminates the short fibres, impurities, naps, immature fibres from the sliver, straightens the fibres and make them parallel along the sliver length”.

Why is combing done while making a yarn?

Combing the fibres removes the short fibres and arranges the fibre in a flat bundle, with all the fibres going the same direction. This preparation is commonly used to spin a worsted yarn. Woollen yarns cannot be spun from fibre prepared with combs, instead, the fibre must be carded.

Why is combing action necessary in cotton yarn processing?

Combing reduces hairiness of the yarn. It accelerates the next process. Combing reduces imperfection like- neps, thick and thin places of the yarn. Better twist distribution is achieved by the combing action.

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How the quality of lap affects the noil extraction at combing machine?

If the lap is too thick, the fibres present at the bottom of the lap will not get combed properly. … If it is not even across the width, then the lap is not going to be held tightly at places across the width, which will result in pulling out of the fibres in lumps and good fibres may end up in going with the noil.

Why is combing necessary for finer yarn?

Necessity of combing

For finer count, high draft is required but draft irregularity for presence of short fibre. After combing short fibre free product (sliver/roving) is ready for higher draft. … Longer fibres are finer than short fibres. After combing higher count is possible to keep minimum no of fibre in yarn dia.

How can you determine better yarn is produced after combing action?

To improve the yarn quality, the comber must perform the following operations:

  1. Elimination of precisely pre-determined quantity of short fibers;
  2. Elimination of the remaining impurities;
  3. Elimination of a large proportion (not all) of the neps in the fiber material;
  4. Formation of a sliver having maximum possible evenness;

What is the difference between carding and combing?

Combing and carding are two related techniques for preparing cotton, hair or wool fibres. … In general, combed fibres are cleaner, finer, stronger and more lustrous than carded ones. Combed fibres are generally used for producing worsted threads. Carding is a technique whereby two hand or machine cards are used.

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What is the benefits of combing fabric?

“Combing is a technique that has been used in the preparation of textiles for centuries. Essentially, combing is a process that helps to smooth and prepare fibers for use in spinning. Combing also helps to separate short fibers from longer ones, which also helps to make the process of spinning much easier.”

How combing helps for overall mean length improvement?

Combing process removes predetermined level of short fibres from the group of cotton fibres. It is well known that the cotton fibres have distribution of fibre lengths starting from long to very short fibres.

What is combing cycle?

Combing is an intermittent operation carried out between carding and drawframe. The combing process is normally used to produce smoother, finer, stronger and more uniform yarns. The carded materials (sliver) contain certain amount of short fibers, neps, fine kitty and leaf particles.

What is the combing process in spinning?

Combing Definition for the Textile and Apparel Industry. Combing is a method for preparing carded fiber for spinning. It separates out the short fibers by means of a rotating ring or retalinear row of steel pins. The fibers in the ‘top’ it produces, have been straightened and lie parallel to each other.

What is Vario comb?

Staedtler+UHL VARIO high performance Circular Combs are adaptable without problem to any combing machine. The VARIO-System consists of a basic body which is equipped with replaceable VARIO bars. … Such fine tuning of VARIO bars permits an optimum combing of the cotton fibres with a minimum percentage of noil.

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Which type of fibre hook is removed in combing process?

Combing operation removes the leading hooks present in the feed lap preferentially. So, there should be even number of processes between the card and the comber.

What are the objects of combing?

Objectives of Combing

  • To remove the fiber shorter than a predetermined length.
  • To remove remaining impurities in the comber lap.
  • To remove naps in the carded sliver.
  • To make the fiber more parallel and straight.
  • To produce a uniform sliver of required per unit length.