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Drawing frame plays an important role on yarn quality. There are two types of processing line in jute spinning. One is conventional (traditional) and other is modern line (high speed). The difference between these two lines is due to the difference of drawing stages. In modern line mono-head high-speed type draw frame is in use, where in conventional line push-bar type draw frame is in use. The study was carried out to find out the effectiveness of the line in quality control of jute yarn. The effectiveness of mono-head high-speed type draw frame was better than conventional line push-bar type draw frame on the quality control of jute yarn.
Carding is one important step in processing line of jute spinning. The cylinder is the heart of the whole machine due to the carding action, which causes from its cylinder speed and other rollers. This action mainly occurs in breaker card machine. This study was carried out to find out the effectiveness of various speeds of breaker card cylinder on fibre length and quality of jute yarn 276 tex (8 lbs./spy). Medium speed of the brake card cylinder was better than any other speeds for good fibre length and quality of jute yarn.
The spin Guard Gardella is a centrifugal type dry spinning machine. In this machine yarn can be spun from 72 (2.08 lbs./spy) to 241 tex (7 lbs./spy). But in this system of this machine, it is preferable to produce fine yarn. Here fine yarn 103 tex (3 lbs./spy) was produced in existing speed. Apron Draft Spinning frame was modified into ring spinning system. In this system rings and travelers were used and fine yarn upto 103 tex (3 lbs./spy) was produced. Bangla white B (BWB) grade jute fibres were used for producing fine yarn. The spinning performance and physical properties of produced yarn were found and compared. It was found that the yarn produced from Gardella spinning frame was better than modified ring spinning frame.
An emulsion making process has been developed for spinning hessian type jute yarn by eliminating mineral oil from the normal sequence of emulsion processing. A number of experiments were carried out with jute fibers and 242 and 280 tex yarn were spun on the hessian spinning frame. It was observed that the elimination of mineral oil in emulsion processing did not make the yarn quality worse.