Diameter: 30 to 36 μm
Very fine: < 10 μm, Fine: < 20 μm, Medium: 20-50 μm, Course: > 50 μm
Staple length: 8 to 30mm
short < 26 mm, medium 26-29 mm, long: 30-38 mm, extra long: 39 mm and over
Natural fibre colour: Brownish yellow colour
Microscopic Images (Cross sectional and SEM):
Liu, Jie, and Wang, Fumei. “Influence of Mercerization on Micro-structure and Properties of Kapok Blended Yarns with Different Blending Ratios.” Journal of Engineered Fibers and Fabrics 6.3 (2011): 155892501100600. Web.Caption:
Smooth circular cross section with wide air filled lumen
Smooth with wax cutin on the fiber surface which makes them water repellent
Tensile strength (cN/dtex) :
Moisture regain (%): 10%
Flammability: Cellulosic fibres such as cotton, hemp jute etc. burns with a steady flame and smells like burning paper or leaves. The ash is greyish and easily crushed.
used in bedding and upholstery industries, in the production of life-saving equipment, and in the construction of thermally insulated and soundproof covers and walls.
Taylor MA, 2004. Technology of Textile Properties. Third edition. Forbes Publications, London, UK.
Zhong Z and Xiao C, 2008. Fabric composition and testing. In: Fabric Testing. Ed: Hu, J. Woodhead Publishing Limited, Cambridge, UK.
ISO/TR 11827:2012 Textiles — Composition testing — Identification of fibres.
Houck, Max M. Identification of Textile Fibers. Cambridge : Boca Raton: Woodhead Pub. in Association with The Textile Institute ; CRC, 2009. Print.