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Kenaf fiber(Bast fiber)

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Introduction
Structure of Fiber
Production, Processing & Cultivation of Fiber
Harvesting
Retting
Washing
Drying
Properties
End Uses

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Kenaf fiber(Bast fiber)

  1. 1. Outline: Introduction Structure of Fiber Production, Processing & Cultivation of Fiber Harvesting Retting Washing Drying Properties End Uses
  2. 2. Introduction: Kenaf is a natural fiber which is a plant in the Malvaceae family. Botanical name is Hibiscus cannabinu. It is grown mainly for bast fiber in China (44%), India (39%), Indonesia, Malaysia, Bangladesh, USA, South Africa, Thailand and parts of Africa. Fiber: Two kinds, the long fibers are mainly in the thin bark (cortical layer), whereas the short fibers are in the ligneous core, namely pith (short fiber).
  3. 3. Structure of Fiber:  The stalk of the Kenaf plant consists of two distinct types of fibers :  The outer fiber is called bast and comprises roughly 40% of the stalk dry weight.  Refine bast fiber measure 2.6mm and are similar to the best softwood fiber used to make paper  White inner fiber is called core and comprises 60% of the dry weight.
  4. 4. Composition  Cellulose percentage is from 44 to 55%. hemi cellulose 21%,pectine is 2%.  Lignin: lignin percentage is from 15 to 19%.
  5. 5. Production, Processing and Cultivation of Fiber:  It is sown from may to October. Growing quickly rising to a height of 5-6 m in a 6 to 8 months.  Temperature need from 20 to 27 degree centigrade
  6. 6. Harvesting  Kenaf crop are both hand and machine harvested.  Fiber are usually separated from the stalk mechanically although retting is still done by hand in some areas.  Plant are harvested for their stalk from which the fiber is extracted.
  7. 7. Retting of Kenaf fiber  The process by which the fiber got loosened and separated from the woody stalk.  Jute and Kenaf fiber have almost same retting process.
  8. 8. Water Retting  Plant stem are immersed in water river ,ponds and tank.  It need 7 to 14 days.
  9. 9. Washing and Drying  Fiber are separating with water.
  10. 10. Properties of Kenaf fiber  Fiber length: Kenaf fiber length is from 2.6 to 4mm.  Fiber diameter: diameter of Kenaf fiber is from 17 to 21.9 micron.  Density: 1.4 g/cm3.  Elongation: 1.6 %
  11. 11. Uses  Roping: it is use in making ropes.  Paper: it is use in paper production.  Use in coarse cloths.  It is used in automotive product.  Engineered wood, Insulation, Clothing-grade cloth  Soil-less potting mixes  Animal bedding, Packing material

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