A bast fiber used for sacking, burlap, and twine as a backing material for tufted carpets. Jute is one of the most affordable natural fibres and is second only to cotton in amount produced and variety of uses of vegetable fibres. Jute fibres are composed primarily of the plant materials cellulose (major component of plant fibre) and lignin (major components of wood fibre).
Chemical Composition of Jute Fiber
- Cellulose → 65.2%
- Hemi-cellulose → 22.2%
- Lignin → 12.5%
- Water Soluble matter → 1.5%
- Fat and Wax → 0.6%
Defects in Jute
Rooty Jute: in these jute the lower parts of jute fires contain barks.
Specky jute: this defects occur because of insufficient washing which causes the outer barks to adhere in some places
Croppy Jute: this is a defect where the top end of the fibre become rough and hard. It is usually caused by careless steeping.
Knotty jute: the jute fibres contain knots in places and it is caused by insect bite or punctures.
Dezed or Dead fibres: due to over retting in moist condition, the fibre becomes dull, lose strength and becomes inferior for spinning.
Runners: this is a defect where long and hard barky ribbon of fibres remains in jute fibre.
Hunka: defects caused by non-removal of dried up base and hard bark from the fibres.
Mossy jute: fibres from short plants that cannot be properly stripped and cleaned contain broken piece of jute sticks etc.
Flabby or Fluffy jute: due to careless stripping, fibre loses firmness and becomes flabby and hairy
Heart damage: These defects occur when jute fibre contains excess moisture when baled. The centre of the bale becomes badly tendered and in some cases fibres are reduced to powder.