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Determination of Equilibrium Moisture Regain of Jute and Jute Products Under Natural and Controlled Condition.

Md. Shahidullah
Scientific Officer
Physics Department, Physics and Testing Division, BJRI, Technology Wing, Manik Mia Avenue, Dhaka 1207.

Mr. M. R. Alam
Principal Scientific Officer
Physics and Testing Division, BJRI, Technology Wing, Manik Mia Avenue, Dhaka 1207.

Abstract/ Executive Summary:

Samples of raw jute were taken randomly for the study of their moisture regain at different relative humidities and temperatures as well as under natural conditions for different length of time of exposure in Physics Department, BJRI during 01-01-1985. To 31-12-1985. Moisture regain was found to be dependent only on relative humidity alone but also on the temperature. 13.75% moisture regain which is considered standard at 65% RH and 20 degree celcious temperature was actually found to be 12.36%. Instead of increasing , the moisture regain of jute decreased from 12.36% to 11.11% with the increase of exposure time from 2 hours to 24 hours quite unexpectedly.

Keywords: Determination, Moisture,Jute products ,Natural and controlled condition.

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

Start Date: 01-01-1985

End Date: 31-12-1985

Program Area: Postharvest and Agro-processing

Commodity: Jute

Objectives:

1.Determination of equilibrium moisture regain of jute and jute products under natural condition.

2.Quantative determination of optimum environmental conditions for spinning and weaving.

Methodology:

The samples of raw jute were collected at random and were kept in the experimental room of testing department. The relative humidity of the room was determined with the help of a whirling hygrometer. The room temperature was also recorded. Then 100 gms from the collected sample was heated to about 110 degree celcious using the conditioning oven until whole moisture was removed from it i.e. The sample of 100 gms was made bone dry and its dry weight was recorded with the help of a balance attached to the oven. Then the percentage regain of the above sample was found out. The rest of the sample was exposed in the aforesaid room of the testing department and after wards regain of 100 gms from exposed samples was determined for different length of time.

Source of Information: Annual Technical Report 1985: 204-206

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The results reveal that moisture regain of jute does not depend only on relative humidity alone. The temperature has some effects on the moisture regain of jute. It was found that at 65% R.H. and at 22 degree C the moisture regain of jute has been found to be 12.36% but generally it was taken to be about 13.75% at 65% R.H. at 20 degree C. In addition it was found that moisture regain of jute decreased from 12.36% to 11.11% when the time of exposure was increased from 2 hours to 24 hours which normally should not occur rather the regain of jute should have increased with the increased of time of exposure.

Knowledge Management: Report/Proceedings