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A Study on the Effect of Processing Parameters of the Finisher Card Machine on the Physical Properties of Blended Jute Yarn

A. K. M. Mahabubuzzaman
Bangladesh Jute Research Institute (BJRI), Manik Mia Avenue, Dhaka-1207

M. O. G. Miazi
Bangladesh Jute Research Institute (BJRI), Manik Mia Avenue, Dhaka-1207

A. N. Khan
Department of Textile Engineering, Southeast University, Dhaka, Bangladesh

Abstract/ Executive Summary:

Carding is an important step in processing line of jute spinning. A cylinder is the heart of the whole carding machine due to the carding action, which causes from its cylinder speed and other rollers. This action occurs in breaker card and finisher card machine. This study was carried out to find out the effectiveness of various delivery roller speeds of finisher card cylinder on quality of jute-blended yarn 275 tex (8 lbs/spy). An assessment of the quality of 275 tex (8 lbs/spy) yarns spun from the 100% raw jute and jute acrylic blend were made in terms of their physical properties. The results were compared with those of the 100% jute yarns. Raw jute was blended with acrylic and their blended yarns were manufactured mainly to take advantage of value addition and to produce better yarn of jute fiber. For spinning jute acrylic blended yarn, jute fiber was mixed with acrylic in the ratio of 80% jute and 20% acrylic. Medium delivery roller speed (1830 inch/min) of the finisher card cylinder is better than any other speeds for good quality of jute blended yarn. The physical properties of the produced yarns such as load at break, strain percentage, tenacity at break, textile modulus, and quality ratio were tested. Some empirical relations have been developed between the processing parameters of the machine and physical properties of the yarn. The developed equations are valid within the experimental region.

Keywords: Carding, Spinning, Cylinder, Speed, Quality, Jute yarn

Location:

Start Date:

End Date:

Program Area: Postharvest and Agro-processing

Commodity: Jute

Objectives:

To find a suitable delivery roller speed of cylinder, which involves optimum combing action and parallelization of individual fibre to spin blended jute yarn

Methodology:

One type of jute fiber Bangla white B (BWB) grade was procured as raw material for this experiment. Nowadays A grade jute fibre is very rare in the market. On the other hand C grade jute fiber, which is easily available, is not appropriate for manufacturing better quality jute yarn, as there are many neps in the fiber. The fibre containing neps cannot pass through the flyer easily during spinning resulting in greater break ages of yarn, which then leads to decline of spinning effectiveness of the machine. The individual fibre of Tossa jute of B grade (BTB) is however a fiber of top textile modulus than the BWB fibre, which means BTB fibre, is a stiff fibre of higher torsional stiffness. At the same time more hairiness exists in the yarn produced from BTB jute fibre. BWB jute fibre was, therefore, used for the present experiment because of its low hairiness and better fibre compactness in the yarn during spinning. Only Jute fibre was piled with the application of 25% normal emulsion (i.e. 20 % mineral oil, 79.7% water and 0.3% nonidet) and kept for 48 hours for maturation. The entire piled jute was processed on breaker card machine for producing 275 tex. (8 lbs. /spy) all jute yarn (Miazi, 2002). Separately acrylic fiber and BWB grade of jute fiber were taken by weight as per blend ratio (Jute: acrylic=80:20). Jute fibers were piled with required emulsion and kept for 48 hours for maturation . The acrylic fibers were separated and opened up manually by hand teasing and tufts of certain weights were made. After that the blending was carried out by spreading the component fibers i.e. jute and acrylic fibers in desired proportion (jute: acrylic=80:20) by weight over the Breaker card lattice. The total fibre was processed through Breaker card, Finisher card & the drawing line (1st, 2nd & 3rd) for spinning yarns of 275 tex blended jute yarn. The entire piled jute was processed through finisher card machine by changing the gears of the cylinder in five positions i.e. 54,58,60,66 and 68 for 1453,1560,1614, 1775 and 1830 inch/min delivery speeds respectively for producing 275 tex (8 lbs. /spy) yarns. These delivery speeds have been calculated in the following way: The R.P.M. of Motor is 725, Motor pulley diameter is 7 inches and that of machine pulley is 34 inches. The R.P.M. of machine pulley, cylinder, cylinder pinion and stripper driving pulley all become the same, i.e. 725 x 7’’/34’’x π/ π =149.2 rpm. The delivery speed (inch/min)= cylinder rpm x(number of teeth cylinder change pinion/no. of teeth in delivery wheel) x π x diameter at delivery roller. Here, number of teeth in delivery wheel is 74 and diameter of delivery roller is 4.25 inches (Ahmed, 1966). Slivers of 5 yards length taken randomly from the breaker card and processed with each of the different delivery speed were weighed. The five different slivers obtained from breaker card were further processed through all the stages of conventional jute processing and 275 tex (8lbs. /spy) yarns were spun. Finally, the spun yarns were tested as per standard methods.

Source of Information: Bangladesh J. Sci. Ind. Res. 46(3), 303-306, 2011

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The results were compared with those of the 100% jute yarns. Raw jute was blended with acrylic and their blended yarns were manufactured mainly to take advantage of value addition and to produce better yarn of jute fiber. For spinning jute acrylic blended yarn, jute fiber was mixed with acrylic in the ratio of 80% jute and 20% acrylic. Medium delivery roller speed (1830 inch/min) of the finisher card cylinder is better than any other speeds for good quality of jute blended yarn. The physical properties of the produced yarns such as load at break, strain percentage, tenacity at break, textile modulus, and quality ratio were tested. Some empirical relations have been developed between the processing parameters of the machine and physical properties of the yarn. The developed equations are valid within the experimental region.

Knowledge Management: Journal