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Studies on Thermal, Mechanical and Acoustic Properties of Jute Felt from Jute Caddies.

Md. Mohiuddin Mallick
Senior Scientific Officer
Physics Department, Textile Physics Division, BJRI, Manik Mia Avenue, Dhaka-1207.

Kazi Md. Ahmed Karim
Principal Scientific Officer
Physics Department, Textile Physics Division, BJRI, Manik Mia Avenue, Dhaka-1207.

Md. Golam Kibria
Scientific Officer
Physics Department, Textile Physics Division, BJRI, Manik Mia Avenue, Dhaka-1207.

Abstract/ Executive Summary:

Jute felt has many uses and at present it is manufacture from the tread waste and cutting. It is almost wholly used as carpet underlay. Jute caddis fetch a very low price because of their effective utilization involves a lot of problems. Sometimes they are used in the production of sacking weft yarn of heavy count but only upto 20%. It is difficult to dispose. Moreover, it is observed that the sound level is maximum in weaving sections and minimum in softener section. But jute industries are unable to meet their requirement, 85dB which is the standard. To minimize this excess noise, acoustic behavior of different types of felt made from jute caddies (100%), carpet waste (6mm) and 80:20 caddies and acrylic using needle punch technique were studied in Physics department during 1987. It was found that about 4% noise can be minimized using felt made from 100% caddies whereas nearly 5% noise can be minimized using felt made from carpet waste while approximately 10% noise can be minimized using felt made from 80:82 acrylic blended caddies.

Keywords: Carpet waste, Caddies, Blended felt, Noise.

Location: Different Jute Mills, Physics Department, Textile Physics Division, BJRI, Manik Mia Avenue, Dhaka-1207.

Start Date: 01-01-1985

End Date: 31-12-1987

Program Area: Variety and Species

Commodity: Jute

Objectives:

1.To study the acoustic behavior of the felt

2.To study the noise level in the mills

3.To study the properties of different types of felt on noise absorption.

Methodology:

To study the acoustic properties of the felt the possible places such as Adamjee jute mill, Karim Jute Mill, Latif Bawani Jute Mill noise levels are recorded in db unit during the jute processing by a finisher card by which sound level meter which can measure any level within the range 6-110 dB specially the places where labors were working. A study on noise absorption effect was also carried on jute felt by applying known signal in to the sonic emitter and final signal were collected in the output of the transducer. The size of the felt was always 15cmX20cm with thickness of 6mm.

Source of Information: Annual Technical Report 1987: (156-161)

Article Link (Online Journal):

Funding Source:

1. Government

Budget: 35,000/- (Thirty Five Thousand Taka Only)

Total Budget (Tk.) : 35,000/- (Thirty Five Thousand Taka Only)

Achievement/Findings:

It is observed that the sound level is maximum in weaving sections and minimum in softener section. When there is no felt the maximum noise level is 110dB which was 104.3 dB, 104.5 dB and 101.2dB when there was 100% caddies felt, carpet waste felt and blended felt respectively. Similarly when there is minimum noise level 75.5dB the felt made from caddies absorb 4% whereas it was 5% when used felt is made from carpet waste while it was 10% when used felt is made from blended caddies.

Knowledge Management: Report/Proceedings