How do you reduce neps in yarn?

How can Neps be reduced?

It is advisable that spinners periodically measure neps in the chute feed material to determine the severity of adding neps during opening and cleaning. The carding process will always reduce neps. This is because neps may either be removed during carding or straightened in the carding zone.

How do you remove Neps from fabric?

Carding both generates and removes neps. Carding is the most significant process where significant decrease in the level of neps can take place. It was also observed that with finer cottons, increasing the card licker-in speed increased the card web neps.

How do you reduce thickness in yarn?

Increase in twist binds the yarn more tightly together which reduces on the number of thick places/km.

What is the main reason for Neps formation?

A very small portion of observed neps may exist in unprocessed cotton, but the vast majority of neps are caused by handling and processing. Almost any mechanical process can cause the formation of neps, but the most likely ones include harvesting, ginning, and opening/cleaning in the textile mill.

How do you reduce neps in cotton yarn?

When flat speed increases, it reduces the neps content and short fiber content of sliver and increases the fiber parallelization, thus decreasing the unevenness. Irrespective of the flat speed, the yarn unevenness increases as the yarn becomes finer as expected.

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How Neps are formed in blowroom?

Neps are created by the mechanical handling and cleaning of the cotton fiber, the neps increase throughout the ginning, opening and cleaning process. Although there is a decrease during carding and combing, both are designed to align fibers and remove imperfections such as neps (Fig. 1).

What is NEP count?

Nep count is the number of neps per 100 square inch of card web forming a standard hank of the sliver of 0.12 Ne on a 40-inch wide card.

What is yarn imperfection?

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 are the faults of yarn?

From all the above yarn faults, some important yarn faults have discussed in the following:

  • Slubs: Slubs are fish-shaped thick places from 1-4cm long and about 5-8 times longer than the average yarn diameter at the thickest portion.
  • Cracker: …
  • Spinners Doubles: …
  • Bad Piecing and Double Gaiting: …
  • Slough Off: …
  • Bottoms: