Papers by Narayanan Balasubramanian
Though it is said that man made fibres are made with precision and do not have variability associ... more Though it is said that man made fibres are made with precision and do not have variability associated with natural fibre, this seldom applies in practise. Not only some amount of variability in properties is found but also defects and abnormalities in fibre are encountered which cause processing problems, defects in final product and waste and rejections. So testing of raw material for various properties is equally important in man made fibres and filaments.
Nipper closing time in Backward Feed and Top comb entry time in Forward feed have critical influe... more Nipper closing time in Backward Feed and Top comb entry time in Forward feed have critical influence on noil. Theoretical noil% when nipper closes before completion of feed in Backward feed and top comb enters before completion of feed in forward feed have been worked out. Backward feed should be used for high noil levels and super combing and Forward feed is recommended for low noil levels and semi combing. Sequence in which operations of feeding, combing and detachment take place in comber has significant influence on noil level. Combing can be done either with backward feed or forward feed. Feeding of sheet takes place during backward movement of nipper in backward feed and feeding takes place while nippers move forward towards detaching rollers in forward feed. In most of the modern combers like Rieter E76, Truetschler TCO, LMW LK 64 and Sacolowell Ca comber there is option to work either with backward or forward feed. Essential features in which the two feeds differ are discussed and the comber settings in each type of feed that has critical influence on noil level are indicated.
Though it is said that man made fibres are made with precision and do not have variability associ... more Though it is said that man made fibres are made with precision and do not have variability associated with natural fibre, this seldom applies in practise. Not only some amount of variability in properties is found but also defects and abnormalities in fibre are encountered which cause processing problems, defects in final product and waste and rejections. So testing of raw material for various properties is equally important in man made fibres and filaments.
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Papers by Narayanan Balasubramanian