What is thick and thin places in yarn?

What is the main difference of thick place and Neps?

Thin places indicate the mass reductions, thick places indicate the mass increase and neps indicates the increase of short mass. Average of ten tests was taken for final result at each trial.

How do you reduce thin spots in yarn?

Ring Frames:

are a few points to be looked into in ring frames for the control of long thin places. Optimum back-zone settings with a reduced break drafts helps to produce yarns with less number of thick/thin places and slubs.

What is imperfection in yarn?

Imperfections can be defined as the total number of neps, thick and thin places in a given length of yarn. … A yarn with more imperfections will exhibit poor appearance grade, lower strength and poor performance in weaving is likely to produce fabric with low quality.

What does the carding process do to the cotton?

carding, in textile production, a process of separating individual fibres, using a series of dividing and redividing steps, that causes many of the fibres to lie parallel to one another while also removing most of the remaining impurities.

What is slenderness ratio in textile?

The “Slenderness Ratio” can serve as a measure of stiffness. Slenderness Ratio = (Fiber Length/ Fiber Diameter) So when slenderness ratio is high, then the stiffness is low. Fibre elongation: Textile fibre should have at least 1-2% elongation characteristics and preferably slightly more.

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What is yarn fault?

Yarn Faults / Defects:

A yarn which is not uniform is said to be irregular or to contain yarn defects or faults. … During the yarn manufacturing process various types of irregularities are generated in the yarn diameter regularly or at intervals which are known as yarn faults.

How do you reduce a Classimat fault?

The blends with lower viscose content shows less occurrence of classimat faults. Increase in the fiber length increased the total faults but increase in the fiber denier decreased the total faults. Fiber length and denier have significant effect on A & B type of faults.

What is Neps yarn?

Textile terms and definitions define a `Nep’ as a small knot of entangled fibers that usually comprises dead or immature fibers. Neps in cotton continue to be a major problem in the cotton yarn manufacturing process. The two main factors affecting nep formation are fiber characteristics and mechanical processing.

How do you increase yarn strength?

Factors that affect yarn strength are as follows –

  1. Staple length. Longer staple cotton gives higher strength and this is true even in the case of synthetic staple fibre such as nylon and terylene. …
  2. Fibre fineness. …
  3. Fibre strength. …
  4. Twist. …
  5. Evenness. …
  6. Fibre length variation and distribution. …
  7. Fibre finish. …
  8. General factors.