Important Measurement Point for Determining Fiber Quality

Determining Fiber Quality:
In yarn manufacturing process, it’s very important to know to determine fiber qualities and fiber properties. Because the lion share cost of yarn manufacturing goes to raw materials. So attaining quality garments is very argent to dignify raw material’s qualities. That’s why we have some specific measurement points by which we can specify actual yarn quality. Some of them are given below with a small description.

Some Important Measurement Point for Determining Fiber Quality

1. Uniformity Ratio:

………………………………..Mean fiber length            .100
Uniformity ratio = …………..……………………….. × ………
…………………………….Upper half mean length         .1

Mean length is the average length of all fibers approximately ¼’’ and longer, and upper half mean length is the estimate of the lengths of fibers in the upper half portion as measured by the fibrograph.

Rating of cotton fibers with respect to uniformity ratio

2. Coefficient of Variation (CV):
CV is a relative measure of the length variation. The larger the value, the greater the variation in fiber lengths, and, conversely the smaller the value, the more uniform are the fiber lengths.

Rating of cotton samples with regard to fiber length variation

3. Fibre Fineness rating in micrograms/ inch:

4. Maturity ratings:

5. Fiber strength rating is 1000lbs. per square inch:

6. Effect of short fibre in yarn:

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