By N. S. Kaplan
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Additional info for A Practical Guide to Fibre Science
If all the properties have to be good for the cotton, the rawmaterial would be too expensive. To produce a good yarn with this difficulties, an intimate knowledge of the raw material and its behaviour in processing is a must. Fibre characteristics must be classified according to a certain sequence of importance with respect to the end product and the spinning process. Moreover, such quantified characteristics must also be assessed with reference to the following what is the ideal value? what amount of variation is acceptable in the bale material?
Yam strength 3. yarn evenness 4. yam fullness 48 Textile Technology 5. drape of the fabric 6. lustre 7. handle 8. productivity Productivity is influenced by the end breakage rate and twist per inch required in the yarn. Immature fibres(unripe fibres) have neither adequate strength nor adequate longitudinal siffness. They therefore lead to the following: 1. loss of yarn strength 2. neppiness 3. high proportion of short fibres 4. varying dyeability 5. processing difficulties at the card and blowroom Fibre length is one among the most important characteristics.
Mode-Mean) = 3(Median-Mean) where, Median is the particular value of length above and below which exactly 50% of the fibres lie. 5% of fibres in the specimen being tested when the fibres are parallelized and randomly distributed and where the initial starting point of the scanning in the test is considered 100%. This length is measured using "DIGITAL FIBROGRAPH". 50% Span length It is defined as the distance spanned by 50% of fibres in the specimen being tested when the fibres are parallelized and randomly distributed and where the initial starting point of the scanning in the test is considered 100%.
A Practical Guide to Fibre Science by N. S. Kaplan