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Studies of Limitation Factors of Spinning Finer Counts of Yarn with Jute.

Md. Siddiquir Rahman
Senior Scientific Officer
Physics Department, Physics and Testing Division, BJRI, Technology Wing, Manik Mia Avenue, Dhaka-1207.

Abstract/ Executive Summary:

Yarns of different counts, approximately 2 lbs/spindle to 12 lbs/spindle obtained from from different jute mills as well as experimental mill of BJRI were investigated during the year of 1982 in the Physics department of BJRI. Different physical properties of yarn and those of the fibers extracted from the corresponding yarns were determined at standard temperature and humidity. Spinning quality of the yarns was also determined. Yarns of 4.49 count displayed higher quality ratio, breaking strength and low CV% indicating the yarn as more uniform than others. Yarn of 7.32lb/spindle from Dhobdhobey pat was also found to have reasonable good quality ratio though less uniform in comparison to other.

Keywords: Spinning,Finer counts,Yarn with jute.

Location: Physics Department, Physics and Testing Division, BJRI, Technology Wing, Manik Mia Avenue, Dhaka-1207.

Start Date: 01-01-1982

End Date: 31-12-1982

Program Area: Postharvest and Agro-processing

Commodity: Jute

Objectives:

1.To measure the physical characteristics of jute fabrics having different warp and weft constructions

2.To related these to the characteristics of the yarn used.

3.To study the Physico-mechanical properties of yarn

4.To find out the imitating factor of spinning to produce finer count

Methodology:

Samples of different counts of yarn collected from Adamjee Jute Mills Ltd. Dhaka Jute Mills Ltd. and Experimental Mills. Specimen of yarn 20 inches long were selected and breaking strength was measured using Good Brand Tensile Strength Tester. Each yarn piece was clamped in the grip of the tensile tester and the breaking strength was measured and expressed in pounds. 100 individual yarn pieces tested to obtain the average breaking strength of a yarn. After the tensile strength test each test specimen was weighed and the average mass was found out. The diameter of different places along the length of the test specimen were then determined with the help of Projection Microscope. Thereafter 1 inch length from the tip of each of the two broken ends of a test specimen of yarn was cut and weighed on a sensitive electrical balance and the average was determined which was considered to be weight of 1 inch length of the yarn at the fracture zone of the test specimen. It may be mentioned here that a few fibers that protruded much beyond the broken ends were neglected in measuring the 1 inch length from the tip. Another 1 inches length of yarn was cut at random from each individual test specimen and weighed as before zone and the mass of the same yarn at other than fracture zone. Similarly, Grist, fiber length, diameter and yarn irregularity were measured by using standard machine at standard temperature and humidity.

Source of Information: Annual Technical Report 1982: 72-76

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The results reveal that quality ratio gives a convenient way of comparing yarns whose counts are similar but not exactly the same. It was found that quality ratio of Dhobdhobey pat is the third highest among all of the yarn and higher than that of yarn no. 6 and 8. Low twist factor of yarn no. 6 has definitely lowered its Bundle strength by a certain percentage otherwise its breaking strength might have been higher giving a higher quality ratio value. Yarn no. 8 appears to be more uniform than yarn no. 6 and 7 and its twist factor is also within the range of optimum value but still its quality ratio is lower than yarns no. 6 and 7 which may be due to fiber of low quality. Yarn no. 9 has the second highest quality ratio value and appears to be uniform.

Knowledge Management: Report/Proceedings