Kevlar
Fibre structure & physical properties
Fibre composition:
Aramid
Diameter: Can be made to any diameter
Very fine: < 10 μm,
Fine: < 20 μm,
Medium: 20-50 μm,
Course: > 50 μm
Length: Filament
Staple length: continuous filament
short < 26 mm,
medium 26-29 mm,
long: 30-38 mm,
extra long: 39 mm and over
Natural fibre colour: Yellow colour
Microscopic Images (Cross sectional and SEM):
It’s cross section determined by the spinneret. Usually cylindrical, but can be made tri-lobal, tetra, hexa or octagon
Comment:
Surface is undistinguishable, showing not characteristic markings.
Fibre properties (Mechanical, Chemical and Thermal)
Mechanical Properties
Tensile strength (cN/dtex) :
Chemical Properties
Hydrophobicity: Hydrophobic
Moisture regain (%): 7%
Thermal Properties
Flammability: Can be ignited at high tempatures (over 450 degrees) but burning usually stops when the heat source is removed.
Sustainability considerations
End uses
Apparel: high performance textiles. Heat and flame resistant textiles.
Videos
Materials using this fibre
Additional resources
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.
