Jute Fibre

Chemical Composition of Jute Fibre

1. Cellulose  → 65.2%
2. Hemi-cellulose  → 22.2%
3. Lignin  → 12.5%
4. Water Soluble matter  → 1.5%
5. Fat and Wax  → 0.6%

Grading of Jute

                         

Defects in Jute

1. Rooty Jute: in these jute the lower parts of jute fires contain barks.
2. Specky jute: this defects occur because of insufficient washing which causes the outer barks to adhere in some places
3. Croppy Jute:  this is a defect where the top end of the fibre become rough and hard. It is usually caused by careless steeping.
4. Knotty jute: the jute fibres contain knots in places and it is caused by insect bite or punctures.
5. Dezed or Dead fibres: due to over retting in moist condition, the fibre becomes dull, lose strength and becomes inferior for spinning.
6. Runners: this is a defect where long and hard barky ribbon of fibres remains in jute fibre.
7. Hunka: defects caused by non-removal of dried up base and hard bark from the fibres.

Different forms of jute purchased by Mills

Jute is purchased by mills in two forms.

1. Jute may be purchased in the form of bundles of 1 to 2 mounds or 3 to 4 mounds of kutcha jute or in loose forms. In these forms the fibres are uncut and require selection, grading, and piecing-up before processing.

2. Jute fires used for export are bought in the form of pucca bales each weighing 400 lbs including 6 lbs binding ropes. The dimension of the bales is

4 feet 1 inches by 1 feet 6.5 inches by 1 feet 6 inches = 9.5 cubic feet

      And the bales are under pressure of 6000 to 7000 lbs per square inch.